JP2008233462A - Projector and projection method for projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector capable of efficiently projecting an object in predetermined size, and to provide a projection method for a projector. <P>SOLUTION: In the projector 1, an image control part arithmetically operates (calculates) zoom data for a zoom lens 61 for projecting the object to a screen 200 so as to be in size nearly coincident with size data of the object based on distance data to the screen 200 acquired by a distance acquisition means, object data acquired for a predetermined object from image information by an object acquisition means, and size data corresponding to the object data stored in an object storage part and acquired by a size data acquisition part. Then, the zoom lens 61 is driven by a zoom lens drive part 100 based on the calculated zoom data. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector and a projection method for the projector.

  Conventionally, a projector modulates a light beam emitted from a light source with a light modulation device based on image information to form an optical image, and the formed optical image is projected onto a projection target surface such as a screen via a projection lens. Projecting as Also, the projector can be viewed by many people at the same time by enlarging and projecting an image with a projection lens.

  In recent years, the price of projectors has been reduced, and the spread of projectors has accelerated. In addition to companies and schools, projectors are used in various places such as homes, game halls, restaurants and the like. Under such circumstances, projectors are often used in business relations in companies and the like, and in particular, are used for projecting presentation materials.

  When projecting presentation materials or the like, there may be a case where it is desired to project a certain target object (for example, an image representing the appearance of a new product or the like) with a predetermined size. For example, when it is desired to project the actual size of the target object itself (actual size), the user enlarges / reduces the projection size by rotating the zoom lens that constitutes the projection lens, and thus the actual size. Therefore, the projector is operated and projected so as to be approximately the same level. When the purpose of the presentation is to have the object understood, it is an effective means to project the object in a predetermined size (especially the actual size).

  However, it takes time for the user to rotate the zoom lens and adjust the object so that the object is projected to a predetermined size while visually confirming the zoom lens. There was a problem that it was different from the predetermined size. As a result, efficient presentation progress was hindered.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a projector and a projector projection method capable of efficiently projecting an object with a predetermined size.

  In order to achieve the above-described object, a projector according to the present invention modulates a light beam emitted from a light source with a light modulation device based on image information to form an optical image, and projects the light onto a projection target surface via a projection lens. A projector that projects as an image, a distance acquisition unit that acquires distance data to a projection target surface, a target acquisition unit that detects a predetermined target from image information, and acquires target data; Object storage unit for storing size data, size data acquisition unit for acquiring size data corresponding to the object data from the object storage unit, distance data acquired by the distance acquisition unit, and object acquisition unit Based on the object data acquired in step 1 and the object size data acquired by the size data acquisition unit, the object is projected onto the projection target surface so that the object is substantially the same size as the object size data. An image control unit that calculates and controls zoom data for the projection lens for capturing, and a projection lens drive unit that drives the projection lens based on the zoom data calculated by the image control unit And

According to such a projector, the distance acquisition unit acquires distance data to the projection target surface, and the target acquisition unit detects a predetermined target from the image information and acquires target data. Then, the size data acquisition unit acquires size data corresponding to the object data from the object storage unit that stores the size data of the object. Then, a projection for causing the image control unit to project onto the projection target surface based on the distance data, the object data, and the size data so that the object has a size that substantially matches the size data of the object. The zoom data for the lens is calculated and controlled. Then, the projection lens driving unit drives the projection lens based on the zoom data calculated by the image control unit, thereby performing projection with a size that substantially matches the size data of the object.
With such a configuration, by setting the size data to a predetermined size, it is possible to realize a projector that can efficiently project an object with a substantially predetermined size. When the predetermined size is, for example, the actual size of the target object, a projector capable of efficiently projecting the target object at approximately full size is realized.

  In order to achieve the above-described object, the projector of the present invention modulates a light beam emitted from a light source with a light modulation device based on image information to form an optical image, and projects a projection object through a projection lens. A projector that projects an image on a surface, a distance acquisition unit that acquires distance data to a projection target surface, a zoom acquisition unit that acquires zoom data of a projection lens, and a predetermined object detected from image information Object acquisition means for acquiring object data, an object storage unit for storing object size data, and a size data acquisition unit for acquiring size data corresponding to the object data from the object storage unit The distance data acquired by the distance acquisition unit, the zoom data acquired by the zoom acquisition unit, the target data acquired by the target acquisition unit, and the target acquired by the size data acquisition unit Based on the size data, zooming of the image size of the object data with respect to the image size of the light modulation device for projecting onto the projection target surface so that the object is substantially the same size as the size data of the object And an image control unit that performs control to calculate data and send image information obtained by zooming a predetermined area including the object to the light modulation device based on the zoom data.

According to such a projector, the distance acquisition unit acquires distance data to the projection target surface, the zoom acquisition unit acquires zoom data of the projection lens, and the target acquisition unit detects a predetermined target from the image information. To acquire the object data. Then, the size data acquisition unit acquires size data corresponding to the object data from the object storage unit that stores the size data of the object. Then, the image control unit causes the target object to be projected onto the projection target surface based on the distance data, the zoom data, the target object data, and the size data so as to have a size that substantially matches the size data of the target object. The zoom data of the image data of the object data relative to the image size of the light modulation device is calculated, and based on the zoom data, control is performed to send image information obtained by zooming a predetermined area including the object to the light modulation device. Do. As a result, the light modulation device performs modulation using the zoomed image information, and the modulated optical image is projected onto the projection target surface with a size that substantially matches the size data of the object by the projection lens.
With such a configuration, by setting the size data to a predetermined size, it is possible to realize a projector that can efficiently project an object with a substantially predetermined size. When the predetermined size is, for example, the actual size of the target object, a projector capable of efficiently projecting the target object at approximately full size is realized.

  In the projector described above, the distance acquisition unit includes a distance detection unit that detects distance information to the projection target surface, and a distance processing unit that processes the distance information detected by the distance detection unit as distance data. The object acquisition means may include an object detection unit that detects object information of a predetermined object from image information, and an object processing unit that processes the object information detected by the object detection unit as object data. preferable.

According to such a projector, the distance acquisition unit detects distance information to the projection target surface by the distance detection unit, and processes the distance information as distance data by the distance processing unit. Further, the object acquisition means detects object information of a predetermined object from the image information at the object detection unit, and processes the object information as object data at the object processing unit.
With this configuration, distance data and object data can be acquired, and a projector capable of efficiently projecting an object with a substantially predetermined size by setting the size data to a predetermined size. Can be realized.

  In the projector described above, the distance acquisition unit includes a distance detection unit that detects distance information to the projection target surface, and a distance processing unit that processes the distance information detected by the distance detection unit as distance data. The acquisition unit includes a zoom detection unit that detects zoom information of the projection lens, and a zoom processing unit that processes the zoom information detected by the zoom detection unit as zoom data. It is preferable to have an object detection unit that detects object information of the object and an object processing unit that processes the object information detected by the object detection unit as object data.

According to such a projector, the distance acquisition unit detects distance information to the projection target surface by the distance detection unit, and processes the distance information as distance data by the distance processing unit. The zoom acquisition means detects zoom information of the projection lens by the zoom detection unit, and processes the zoom information as zoom data by the zoom processing unit. Further, the object acquisition means detects object information of a predetermined object from the image information at the object detection unit, and processes the object information as object data at the object processing unit.
With this configuration, it is possible to acquire distance data, zoom data, and object data. By setting the size data to a predetermined size, it is possible to efficiently project the object at a substantially predetermined size. Possible projectors can be realized.

  In the projector described above, it is preferable that the distance detection unit includes a distance sensor that uses reflection of light.

  According to such a projector, by having the distance sensor in the distance detection unit, it is possible to reliably detect the distance information to the projection target surface.

  In the projector described above, it is preferable that the distance detection unit includes a distance sensor that uses reflection of light, and the zoom detection unit includes a position sensor that detects a movement position of the projection lens.

  According to such a projector, by having the distance sensor in the distance detection unit and the position sensor in the zoom detection unit, the distance information to the projection target surface is reliably detected, and the zoom information of the projection lens is detected by the moving position. be able to.

  In the projector described above, it is preferable that the distance detection unit includes a distance sensor that uses reflection of light, and the zoom detection unit includes an imaging sensor that detects a projection size projected on the projection target surface.

  According to such a projector, by having a distance sensor in the distance detection unit and an imaging sensor in the zoom detection unit, it is possible to reliably detect the distance information to the projection target surface, and to determine the projection size projected on the projection target surface. By detecting, zoom information of the projection lens can be detected.

  In order to achieve the above-described object, a projection method of a projector according to the present invention acquires a distance acquisition step of acquiring distance data to a projection target surface, and acquires a target object by detecting a predetermined target from image information. An object acquisition step, an object storage step for storing the size data of the object, and a size data acquisition step for acquiring size data corresponding to the object data from the size data stored in the object storage step; Based on the distance data acquired in the distance acquisition step, the target data acquired in the target acquisition step, and the size data of the target acquired in the size data acquisition step, the target is the size of the target The image control process for calculating and controlling the zoom data for the projection lens for projecting onto the projection target surface so that the size substantially matches the data, and the image control process. And having a projection lens driving step for driving the projection lens based on Mudeta.

According to such a projection method of the projector, distance data to the projection target surface is acquired in the distance acquisition step, and a predetermined target is detected from the image information in the target acquisition step to acquire target data. Further, the size data of the object is stored in the object storing step. And the magnitude | size data corresponding to the object data memorize | stored at the object memory | storage process are acquired by a magnitude | size data acquisition process. Then, in the image control process, based on the distance data, the object data, and the size data, a projection for projecting onto the projection target surface so that the object has a size that substantially matches the size data of the object. The zoom data for the lens is calculated and controlled. Then, the projection lens driving step drives the projection lens based on the zoom data calculated in the image control step, thereby performing a projection that substantially matches the size data of the object.
By setting the size data to a predetermined size through such a process, a projection method capable of efficiently projecting an object with a substantially predetermined size can be realized. For example, when the predetermined size is set to the actual size of the object, a projector projection method capable of efficiently projecting the object at approximately the actual size is realized.

  In order to achieve the above-described object, the projector projection method of the present invention includes a distance acquisition step of acquiring distance data to the projection target surface, a zoom acquisition step of acquiring zoom data of the projection lens, and image information. The object acquisition step for detecting a predetermined object from the object and acquiring the object data, the object storage step for storing the size data of the object, and the object data from the size data stored in the object storage step Size data acquisition process for acquiring size data corresponding to the distance data acquired in the distance acquisition process, zoom data acquired in the zoom acquisition process, object data acquired in the object acquisition process, and size Based on the size data of the target acquired in the data acquisition step, the target is projected onto the projection target surface so as to have a size that substantially matches the size data of the target. The zoom data of the image data of the object data relative to the image size of the light modulation device is calculated, and based on the zoom data, image information obtained by zooming a predetermined area including the object is transmitted to the light modulation device. And an image control step for performing control.

According to such a projector projection method, distance data to the projection target surface is acquired in the distance acquisition step, zoom data of the projection lens is acquired in the zoom acquisition step, and a predetermined target is obtained from the image information in the target acquisition step. Object is detected and object data is acquired. Further, the size data of the object is stored in the object storing step. And the magnitude | size data corresponding to the object data memorize | stored at the object memory | storage process are acquired by a magnitude | size data acquisition process. Then, by the image control process, based on the distance data, zoom data, object data, and size data, the object is projected onto the projection target surface so as to have a size that substantially matches the size data of the object. The zoom data of the image data of the object data relative to the image size of the light modulation device is calculated, and based on the zoom data, image information obtained by zooming a predetermined area including the object is transmitted to the light modulation device. Take control. As a result, the light modulation device performs modulation using the zoomed image information, and the modulated optical image is projected onto the projection target surface with a size that substantially matches the size data of the object by the projection lens.
By setting the size data to a predetermined size through such a process, a projection method capable of efficiently projecting an object with a substantially predetermined size can be realized. For example, when the predetermined size is set to the actual size of the object, a projector projection method capable of efficiently projecting the object at approximately the actual size is realized.

  In the projector projection method described above, the distance acquisition step includes a distance detection step for detecting distance information to the projection target surface, and a distance processing step for processing the distance information detected in the distance detection step as distance data. The object acquisition process includes an object detection process for detecting object information of a predetermined object from the image information, and an object processing process for processing the object information detected in the object detection process as object data. It is preferable to have.

According to such a projector projection method, in the distance acquisition step, distance information to the projection target surface is detected in the distance detection step, and the distance information is processed as distance data in the distance processing step. In the object acquisition process, the object information of the predetermined object is detected from the image information in the object detection process, and the object information is processed as object data in the object processing process.
Through such a process, distance data and object data can be acquired, and by setting the size data to a predetermined size, it is possible to efficiently project the object at a substantially predetermined size. A simple projector projection method can be realized.

  In the projector projection method described above, the distance acquisition step includes a distance detection step for detecting distance information to the projection target surface, and a distance processing step for processing the distance information detected in the distance detection step as distance data. The zoom acquisition step includes a zoom detection step for detecting zoom information of the projection lens, and a zoom processing step for processing the zoom information detected in the zoom detection step as zoom data, and the object acquisition step includes image information. It is preferable to have an object detection process for detecting object information of a predetermined object and an object processing process for processing the object information detected in the object detection process as object data.

According to such a projector projection method, in the distance acquisition step, distance information to the projection target surface is detected in the distance detection step, and the distance information is processed as distance data in the distance processing step. In the zoom acquisition step, zoom information of the projection lens is detected in the zoom detection step, and the zoom information is processed as zoom data in the zoom processing step. In the object acquisition process, the object information of the predetermined object is detected from the image information in the object detection process, and the object information is processed as object data in the object processing process.
Through such steps, distance data, zoom data, and object data can be acquired, and by setting the size data to a predetermined size, the target can be efficiently projected at a substantially predetermined size. It is possible to realize a projector projection method that can be used.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)

  FIG. 1 is a schematic configuration diagram of a projector according to a first embodiment of the invention. The configuration and operation of the projector 1 will be described with reference to FIG.

  The projector 1 includes an A / D conversion unit 10 that converts an input image signal into a digital signal, and an image processing unit that performs reduction or enlargement (scaling) processing on the digital signal in accordance with the specifications of the liquid crystal panel 50 as a light modulation device. 20 and a liquid crystal panel driving unit 30 for converting a digital signal subjected to image processing for display on the liquid crystal panel 50.

  Then, the light source that emits the light beam, the illumination optical system 40 that performs polarization conversion and color separation of the emitted light beam, the liquid crystal panel 50 that performs light modulation, and the transmitted light from the liquid crystal panel 50 are color-synthesized, and the combined light And a projection lens 60 as a projection optical system for enlarging and projecting. Moreover, the control part 70 which controls the whole operation | movement including the timing of these operation | movements, etc. is provided.

  The control unit 70 is a CPU 71 that controls arithmetic processing and the entire system based on various control programs, a ROM 72 that stores a control program of the CPU 71 in advance, data read from the ROM 72 and the like, and a calculation process of the CPU 71. It consists of a RAM 73 for storing necessary calculation results and various tables. These are connected to each other by a bus which is a signal line for transferring data so that data can be exchanged.

  In addition, a remote control device (remote controller) 91 for a user to operate the projector 1 and a remote control control unit 90 that receives a signal from the remote control device 91 and sends a signal to the control unit 70 are provided.

  The projector 1 operates as a distance detection unit 80 that detects the distance to the projection target surface (screen 200 in the present embodiment), and a distance processing unit that processes the distance information detected by the distance detection unit 80 as distance data. The control part 70 which performs is provided. The distance detection unit 80 and the distance processing unit (control unit 70) constitute a distance detection unit. In the present embodiment, the distance detection unit 80 includes a distance sensor that utilizes light reflection. Specifically, a reflective infrared sensor (not shown) is provided as a distance sensor. The reflective infrared sensor is installed on the front side of the projector 1 body on the projection side (the side facing the screen 200).

  The projection lens 60 as a projection optical system includes a zoom lens 61 for enlarging / reducing the image size projected on the screen 200 and a focus lens 62 for adjusting the focus of the projected image. Has been.

  The zoom lens driving unit 100 is provided as a projection lens driving unit that drives the zoom lens 61. In the present embodiment, the zoom lens driving unit 100 drives the zoom lens 61 by a DC (direct current) motor (not shown) and a gear train (not shown).

  Further, the zoom lens position detection unit 110 as a zoom detection unit that detects the position of the zoom lens 61 as zoom information, and the position (zoom information) of the zoom lens 61 detected by the zoom lens position detection unit 110 And a control unit 70 as a zoom processing unit for processing as a magnification (zoom data). The zoom detection unit (zoom lens position detection unit 110) and the zoom processing unit (control unit 70) constitute zoom detection means. In the present embodiment, the zoom lens position detection unit 110 includes a position sensor. More specifically, a photoelectric rotary encoder (not shown) is provided as a position sensor to detect the movement position of the projection lens 60 (zoom lens 61).

  Note that the focus lens 62 is manually adjusted in the present embodiment. The zoom lens 61 and the focus lens 62 are each composed of a plurality of lenses.

  FIG. 2 is a flowchart showing an operation procedure for performing full-scale projection according to the present embodiment. With reference to FIG. 1 and FIG. 2, an operation procedure for performing full-scale projection (hereinafter, referred to as full-scale projection as appropriate) will be described including steps. It is assumed that the projector 1 projects an image including an object for causing the screen 200 as a projection target surface to project a predetermined size.

  In the present embodiment, it is assumed that an image including an object for causing full-scale projection is projected. When the control unit 70 determines that an input signal from the user's remote control device 91 is input as an input for projecting an object in the projected image with a predetermined size (actual size). The operation procedure after that is shown. In addition, it is assumed that the projection lens is set by driving the zoom lens 61 using the zoom lens driving unit 100 and the focus lens 62 is manually rotated to adjust the focus of the projected image. .

  In step S100, the control unit 70 (hereinafter referred to as the CPU 71) drives the reflection type infrared sensor of the distance detection unit 80 constituting the distance acquisition unit, and detects the distance to the screen 200 as distance information. The reflection-type infrared sensor detects distance information by projecting infrared rays toward the screen 200 and receiving infrared rays reflected and returned from the screen 200. And the distance detection part 80 outputs distance information. Next, the process proceeds to step S101.

  In step S101, the CPU 71 operates as a distance processing unit constituting a distance acquisition unit. The CPU 71 inputs distance information output from the reflective infrared sensor of the distance detector 80, reads a table indicating correspondence between the distance information stored in the RAM 73 and the actual distance (distance data), and detects the detected distance. The distance data corresponding to the information is calculated (calculated). Next, the process proceeds to step S102.

  Step S100 corresponds to the distance detection process, and step S101 corresponds to the distance processing process. Moreover, a distance acquisition process is comprised by a distance detection process and a distance processing process.

  In step S <b> 102, the image processing unit 20 operates as a target detection unit constituting the target acquisition unit, and detects a target from an image signal input to the image processing unit 20. The object detection unit is constructed by reading and executing a program for detecting an object from the ROM 72. In the present embodiment, the object detection unit detects (recognizes) the object by detecting the outer shape of the object (detecting object information) by executing the program. The ROM 72 stores a program for detecting (recognizing) various objects.

  Note that the image processing unit 20 performs a scaling process so that the image size of the input image corresponds to the image size of the liquid crystal panel 50 as the light modulation device. Note that the image size of the liquid crystal panel 50 in the present embodiment is an XGA size (1024 × 768 dots), and is stored in the RAM 73 as image size data. Then, when the size of the input image is, for example, the HDTV size (1920 × 1080 dots), the image processing unit 20 processes the HDTV size to be the XGA size by scaling processing.

  Next, in step S103, the image processing unit 20 operates as an object processing unit that constitutes the object acquisition unit, and processes the detected object as object data. Specifically, the image size of the object with respect to the image size of the liquid crystal panel 50 is calculated (calculated) as the object data. The calculated image size of the object (object data) is output to the control unit 70. Next, the process proceeds to step S104.

  Step S102 corresponds to an object detection process, and step S103 corresponds to an object processing process. Moreover, a target object acquisition process is comprised by a target object detection process and a target object processing process.

  In step S104, the CPU 71 operates as a size data acquisition unit. The CPU 71 reads a table indicating the correspondence between the target object and the size data of the target object from the RAM 73 as the target object storage unit, and acquires size data for the detected target object. Specifically, when the object is, for example, a personal computer, size data corresponding to the personal computer is read from the table. When the size data is, for example, 30 cm, the size data of 30 cm is acquired.

  The RAM 73 serving as the object storage unit stores in advance a table indicating the correspondence between the object and the size data of the object. The table stores data indicating various objects and a predetermined size of each object. In the present embodiment, the actual size of the object is set as the predetermined size. Therefore, since the object is a table that matches the size of the object itself of 30 cm, the projection of the actual size is performed.

  In addition, said process to memorize | store corresponds to a target object memory | storage process. Step S104 corresponds to a size data acquisition step.

  In addition, as a method of storing a predetermined size in the object storage unit (RAM 73), an on-screen function (so-called OSD (On Screen Display)) provided in the projector 1 is used, and a menu projected on the screen 200 is used. The user inputs using the remote control device 91 or the like. Further, the object storing step is performed at an arbitrary time when the projector 1 is used.

  Next, in step S105, the CPU 71 operates as an image control unit. The CPU 71 outputs distance data (distance between the screen 200 and the projector 1) output from the distance processing unit, and object data (image size of the object relative to the image size of the liquid crystal panel 50) output from the object processing unit. The size data acquired from the object storage unit is input.

  Then, based on the distance data, the object data, and the size data, the CPU 71 determines that the object (for example, a personal computer) is the object size data (for example, a personal computer) with respect to the screen 200 installed at the position indicated by the distance data. For example, the zoom magnification (zoom data) with respect to the zoom lens 61 is calculated (calculated) so as to be projected so as to be substantially the same (substantially coincide with 30 cm). Step S105 corresponds to an image control process.

  Next, in step S106, the CPU 71 drives the zoom lens driving unit 100 in order to move the zoom lens 61 to the initial setting position. Therefore, regardless of the position of the zoom lens 61 that is currently projected, the zoom lens 61 performs an operation of returning to the initial setting position. Note that the initial setting position is a position where the zoom magnification is minimum. Next, the process proceeds to step S107.

  In step S107, the CPU 71 causes the zoom lens driving unit 100 to drive the zoom lens 61 so that the calculated zoom magnification is obtained. Specifically, the CPU 71 drives the zoom lens driving unit 100, and the zoom lens position detection unit 110 detects the movement position of the zoom lens 61 driven by the zoom lens driving unit 100, thereby the position corresponding to the zoom magnification. Thus, the driving of the zoom lens driving unit 100 is stopped. Step S107 corresponds to a projection lens driving process.

  By executing the above flow, an object (for example, a personal computer) projected through the projection lens 60 is projected in actual size (for example, 30 cm). In this case, for example, a projection size of 5 times becomes a projection size of 3 times according to the zoom magnification that also calculates the projection size.

  FIG. 3 is a diagram for explaining a full-scale projection according to the present embodiment. FIG. 3A is a diagram illustrating a state in which the projection is first performed, and FIG. It is a figure which shows the state which performed. With reference to FIG. 3, the full-scale projection will be described.

  As shown in FIG. 3A, normally, an image (video) including an image of the object T is projected on the screen 200 as the projection size A. The projection size A is a size according to user preference.

  In this state, for example, when the user operates an input key for projecting a predetermined size of an object set on the remote control device 91, the operation procedure is controlled by the control unit 70 as shown in FIG. The operation indicated by is executed. As a result, as shown in FIG. 3B, in the present embodiment, the zoom lens 61 is finally operated so that the target T becomes the projection size B projected at the actual size. Can be projected.

  Further, when shifting from the projection size A shown in FIG. 3A to the projection size B shown in FIG. 3B, which is projected in the actual size (the state in step S106 and step S107 in FIG. 2). ) Is a small amount of time, but the projected image is not taken. Specifically, the projection image at this time is processed to be displayed in black. However, the present invention is not limited thereto, and the image may be continuously projected even when the zoom lens 61 is moved.

According to the embodiment described above, the following effects can be obtained.
(1) According to the projector 1 of the present embodiment, distance data to the screen 200 is acquired by the distance acquisition means (the reflective infrared sensor and the distance processing unit (CPU 71) of the distance detection unit 80). Then, the object acquisition means (the image processing unit 20 operating as the object detection unit and the object processing unit) detects a predetermined object T from the image information and detects object data (for the image size of the liquid crystal panel 50). The image size of the object T) is acquired. Then, the size data acquisition unit (CPU 71) acquires size data corresponding to the object data from the object storage unit (RAM 73).
Then, the image control unit (CPU 71) causes the screen 200 to project on the screen 200 so that the size of the target T is substantially the same as the size data of the target T based on the distance data, the target data, and the size data. The zoom magnification is calculated (calculated). Then, the projection lens driving unit (zoom lens driving unit 100) drives the projection lens 60 (zoom lens 61) based on the control of the image control unit, so that the size substantially matches the size data of the target T. Projection.
With such a configuration, the projector 1 capable of efficiently projecting the object T at a substantially real size is realized.

(2) The distance data to the screen 200 is acquired in the distance acquisition process (distance detection process, distance processing process) of the present embodiment. In a target acquisition step (target detection step, target processing step), a predetermined target T is detected from the image information, and target data (image size of the target T with respect to the image size of the liquid crystal panel 50) is obtained. get. In the size data acquisition step, size data corresponding to the target data stored in the target storage step is acquired.
Then, in the image control process, a zoom for projecting onto the screen 200 so that the size of the target T is substantially the same as the size data of the target T based on the distance data, the target data, and the size data. Calculate (calculate) the magnification. Then, in the projection lens driving process, the projection lens 60 (zoom lens 61) is driven based on the control of the image control process, thereby performing projection having a size that substantially matches the size data of the object T.
By such a process, a full-size projection method capable of efficiently projecting the object T at a substantially full size is realized.

  (3) According to the projector 1 of the present embodiment, the distance detector 80 includes the distance sensor (reflective infrared sensor), so that the distance information to the screen 200 can be reliably detected.

(4) According to the projector 1 of the present embodiment, an input unit (switch key) for projecting the object T with a predetermined size can be set in the remote control device 91 or the like. When the user wants to project the object T in the projected image with a predetermined size (in the present embodiment, the actual size), the user projects the object T with the predetermined size. By pressing this switch key, there is no need for visual adjustment and the like, and the object T can be projected in a predetermined size (actual size in this embodiment) easily and reliably. Therefore, an efficient presentation can be performed.
(Second Embodiment)

  FIG. 4 is a flowchart showing an operation procedure for performing full size projection according to the second embodiment of the present invention. Note that the projector 2 (see FIG. 1) of the present embodiment has substantially the same configuration as that of the projector 1 shown in FIG. 1 of the first embodiment. In the projector 2 of the present embodiment, the operations of the zoom lens position detection unit 110 and the image processing unit 20 are different from those of the first embodiment.

  Further, in the present embodiment, the projection of the actual size of the target object is performed as the projection of the predetermined size of the target object. With reference to FIGS. 1 and 4, an operation procedure for performing full-scale projection in the present embodiment will be described including steps.

  Similarly to the first embodiment, the projector 2 according to the present embodiment projects an image including an object for causing a screen 200 as a projection target surface to perform full-size projection. FIG. 4 shows an input for causing the control unit 70 to project an object in the projected image with a predetermined size (actual size) based on an input signal from the user's remote control device 91. The operation procedure after that is shown as follows. In addition, it is assumed that the projection lens is set by driving the zoom lens 61 using the zoom lens driving unit 100 and the focus lens 62 is manually rotated to adjust the focus of the projected image. .

  In addition, with respect to the same parts as those in the flowchart showing the operation procedure in the first embodiment shown in FIG.

  4, step S200 and step S201 are the same as step S100 and step S101 shown in FIG. Specifically, in step S200 and step S201, distance data to the screen 200 is acquired by a distance acquisition unit (a reflective infrared sensor and a distance processing unit (CPU 71) of the distance detection unit 80).

  Step S200 corresponds to the distance detection process, and step S201 corresponds to the distance processing process. Moreover, a distance acquisition process is comprised by a distance detection process and a distance processing process.

  In step S202, the CPU 71 drives the rotary encoder of the zoom lens position detection unit 110 to detect the position (movement distance) of the zoom lens 61 as zoom information. The zoom lens position detection unit 110 operates as a zoom detection unit that constitutes a zoom acquisition unit. The zoom lens position detection unit 110 is driven from the time when an image is projected on the screen 200 by the user's input operation to the remote control device 91, and the rotary encoder outputs the zoom lens position (zoom information). To do. Next, the process proceeds to step S203.

  In step S203, the CPU 71 operates as a zoom processing unit constituting a zoom acquisition unit. The CPU 71 inputs the zoom lens position (zoom information) output from the rotary encoder of the zoom lens position detection unit 110. Then, the CPU 71 reads a table indicating the correspondence between the zoom lens position stored in the RAM 73 and the actual zoom magnification of the zoom lens 61, and sets the zoom magnification (zoom data) corresponding to the detected zoom lens position (zoom information). Calculate (calculate). Next, the process proceeds to step S204.

  Note that step S202 corresponds to the zoom detection process, and step S203 corresponds to the zoom processing process. Further, the zoom detection process and the zoom processing process constitute a zoom acquisition process.

  Next, step S204 and step S205 are the same as step S102 and step S103 shown in FIG. More specifically, in step S204 and step S205, the object acquisition unit (the image processing unit 20 that operates as the object detection unit and the object processing unit) detects a predetermined object from the image information and detects object data. (Image size of the object with respect to the image size of the liquid crystal panel 50) is acquired.

  Step S204 corresponds to the object detection process, and step S205 corresponds to the object processing process. Moreover, a target object acquisition process is comprised by a target object detection process and a target object processing process.

  Next, step S206 is the same as step S104 shown in FIG. Specifically, in step S206, the CPU 71 operates as a size data acquisition unit. The CPU 71 reads a table indicating the correspondence between the target object and the size data of the target object from the RAM 73 as the target object storage unit, and acquires size data for the detected target object. Specifically, when the object is, for example, a personal computer, size data corresponding to the personal computer is read from the table. When the size data is, for example, 30 cm, the size data of 30 cm is acquired.

  Note that, in the RAM 73 as the object storage unit, a table indicating correspondence between the object and the size data of the object is stored in advance as in the first embodiment. The table stores data indicating various objects and a predetermined size of each object. In the present embodiment, the actual size of the object is set as the predetermined size. Therefore, since the object is a table that matches the size of the object itself of 30 cm, the projection of the actual size is performed.

  In addition, said process to memorize | store corresponds to a target object memory | storage process. Step S206 corresponds to a size data acquisition step.

  In step S207, the CPU 71 operates as an image control unit. The CPU 71 outputs distance data (distance between the screen 200 and the projector 2) output from the distance processing unit, a zoom magnification (zoom magnification of the zoom lens 61) output from the zoom processing unit, and an object processing unit. Object data (image size of the object relative to the image size of the liquid crystal panel 50) and size data acquired from the object storage unit are input.

  Then, the CPU 71 does not change the zoom magnification (projection size) of the zoom lens 61 with respect to the screen 200 installed at the position indicated by the distance data based on the distance data, the zoom magnification, the object data, and the size data. In addition, on the liquid crystal panel 50 as a light modulation device, the image size of the object is changed (zoomed) with respect to the image size of the liquid crystal panel 50 to make the object coincide with the size data (full-size projection). The control to perform is performed.

  The CPU 71 performs zoom data (zoom magnification) of the image size of the object data relative to the image size on the liquid crystal panel 50 based on the distance data, the zoom magnification, the object data, and the size data in order to perform full size projection. ) Is calculated (calculated). Step S207 corresponds to an image control process.

  Next, in step S208, the image processing unit 20 operates as an image correction unit. Based on the zoom magnification of the object image size relative to the image size of the liquid crystal panel 50 calculated by the image control unit (CPU 71), the image processing unit 20 sets the current object image size to the calculated zoom magnification. Change (image correction). At this time, the image size of the set predetermined area including the object is changed. In addition, when the area part including the changed object is smaller than the image size of the liquid crystal panel 50, image correction is performed so that the projection result is displayed in black except for the area part. The image information subjected to the image correction is output to the liquid crystal panel driving unit 30 as an image correction signal. Step S208 is included in the image control process as an image correction process. Next, the process proceeds to step S209.

  Note that the operation of the image correction unit executed in step S208 is the same as the so-called electronic zoom operation. Note that the full-scale projection in the first embodiment is a so-called optical zoom that changes the zoom magnification of the projection lens 60. This difference is the difference between the first embodiment and the second embodiment.

  In step S <b> 209, the liquid crystal panel drive unit 30 drives the liquid crystal panel 50 based on the image correction signal from the image processing unit 20, and the image size of the liquid crystal panel 50 includes the target object that is the result of the image correction. A predetermined area portion is displayed.

  By executing the above flow, an image displayed on the liquid crystal panel 50 includes an object by modulating a light beam from the light source to form an optical image and projecting it onto the screen 200 via the projection lens 60. The predetermined area is projected in actual size. In the present embodiment, the area other than the predetermined area is projected in black.

  FIG. 5 is a diagram for explaining a full-scale projection according to the present embodiment. FIG. 5A is a diagram illustrating a state in which the projection is first performed, and FIG. It is a figure which shows the state which performed. With reference to FIG. 5, full-scale projection will be described.

  As shown in FIG. 5A, normally, an image (video) including an image of the object T is projected on the screen 200 as the projection size A. The projection size A is a size according to user preference.

  In this state, for example, when the user operates an input key for projecting a predetermined size of an object set in the remote control device 91, the operation procedure is controlled by the control unit 70 as shown in FIG. The operation indicated by is executed. As a result, as shown in FIG. 5 (b), the target T has a full size and a predetermined area including the target T is projected. The projection size of the predetermined area including the object T is the projection size C. A black image is projected in a region D (shown by diagonal lines) between the projection size A other than the projection size C.

According to the embodiment described above, the following effects can be obtained.
(1) According to the projector 2 of the present embodiment, the distance acquisition unit (the reflective infrared sensor and the distance processing unit (CPU 71) of the distance detection unit 80) acquires the distance data to the screen 200. Then, zoom data (zoom magnification) of the projection lens 60 (zoom lens 61) is obtained by the zoom acquisition means (the zoom lens position detection unit 110 and the zoom processing unit (CPU 71)). Then, the object acquisition means (the image processing unit 20 operating as the object detection unit and the object processing unit) detects a predetermined object T from the image information and detects object data (for the image size of the liquid crystal panel 50). Image size of the object T) is acquired. Then, the size data acquisition unit (CPU 71) acquires size data corresponding to the object data from the object storage unit (RAM 73).
Then, the image control unit (CPU 71) calculates (calculates) the zoom magnification of the image size of the object T with respect to the image size on the liquid crystal panel 50 based on the distance data, the zoom data, the object data, and the size data. To do. Then, based on the zoom magnification, the image information obtained by changing (image correction) the image size of the current object T to be the calculated zoom magnification is output to the liquid crystal panel driving unit 30 as an image correction signal. More specifically, the CPU 71 calculates the zoom magnification, the image processing unit 20 changes the image information (image correction) so as to obtain the zoom magnification, and the image correction is performed on the liquid crystal panel driving unit as the image correction signal. Output to 30. Then, the liquid crystal panel driving unit 30 drives the liquid crystal panel 50 and modulates it based on the image correction signal, thereby performing projection having a size that substantially matches the size data of the object T.
With such a configuration, the projector 2 capable of efficiently projecting the target T to a predetermined area including the target T with a substantially real size is realized.

(2) The distance data to the screen 200 is acquired in the distance acquisition process (distance detection process, distance processing process) of the present embodiment. Then, zoom data (zoom magnification) of the projection lens 60 (zoom lens 61) is acquired in a zoom acquisition step (zoom detection step, zoom processing step). In a target acquisition step (target detection step, target processing step), a predetermined target T is detected from the image information, and target data (image size of the target T with respect to the image size of the liquid crystal panel 50) is obtained. get. In the size data acquisition step, size data corresponding to the target data stored in the target storage step is acquired.
Then, the image control step calculates (calculates) the zoom magnification of the image size of the object T with respect to the image size on the liquid crystal panel 50 based on the distance data, zoom data, object data, and size data. Then, based on the zoom magnification, image information obtained by changing the image size of the current target T so as to be the calculated zoom magnification is output to the liquid crystal panel drive unit 30 as an image correction signal. Then, the liquid crystal panel driving unit 30 drives the liquid crystal panel 50 and modulates it based on the image correction signal, thereby performing projection having a size that substantially matches the size data of the object T.
By such a process, a full-size projection method capable of efficiently projecting the target T to a predetermined area including the target T with a substantially real size is realized.

  (3) According to the projector 2 of the present embodiment, the distance detection unit 80 includes the distance sensor (reflection infrared sensor), and the zoom detection unit (zoom lens position detection unit 110) includes the position sensor (rotary encoder). The distance information to the screen 200 can be reliably detected, and the zoom information of the zoom lens 61 can be detected from the moving position.

(4) According to the projector 2 of the present embodiment, an input unit (switch key) for projecting the object T at a predetermined size can be set in the remote control device 91 or the like. When the user wants to project the object T in the projected image with a predetermined size (in the present embodiment, the actual size), the user projects the object T with the predetermined size. By pressing this switch key, there is no need for visual adjustment and the like, and the object T can be projected in a predetermined size (actual size in this embodiment) easily and reliably. Therefore, an efficient presentation can be performed.
(Third embodiment)

  FIG. 6 is a schematic configuration diagram of a projector according to the third embodiment of the present invention. The projector 3 of the present embodiment is different from the projector of the second embodiment in that it includes a position sensor as a zoom detection unit that constitutes a zoom acquisition unit, whereas the projector 3 includes an image sensor. . Other configurations are the same as those in the second embodiment.

  Further, in the present embodiment, the projection of the actual size of the target object is performed as the projection of the predetermined size of the target object. With reference to FIG. 6, the configuration and operation of the projector 3 in the present embodiment will be described with respect to components different from those in the second embodiment.

  As described above, the projector 3 of the present embodiment does not include the zoom lens driving unit 100 (see FIG. 1) and the zoom lens position detection unit 110 (see FIG. 1) in the second embodiment. Therefore, when projecting an image, the user manually rotates the zoom lens 61 to set the projection size.

  The projector 3 of the present embodiment includes a zoom detection unit 120 for detecting a zoom magnification (zoom information) for a projection image projected on the screen 200. Note that the zoom detection unit 120 includes an imaging sensor in the present embodiment. Specifically, a CCD (Charge Coupled Devices) camera (not shown) is provided as an image sensor, and the projection size of an image projected on the screen 200 is detected. The CCD camera is installed on the front side of the projector 3 body on the projection side (the side facing the screen 200).

  The projector 3 also includes a captured image memory 130 that stores a projected image detected (captured) by the zoom detection unit 120 (CCD camera). The projector 3 includes an image processing unit 20 that processes a captured image stored in the captured image memory 130, and a control unit 70 that processes the processed captured image as a zoom magnification (zoom data) of the zoom lens 61. Yes. In the projector 3, the zoom detection unit 120 and the zoom processing unit (the captured image memory 130, the image processing unit 20, and the control unit 70) constitute a zoom acquisition unit.

  FIG. 7 is a flowchart showing an operation procedure for performing full-scale projection according to the present embodiment. With reference to FIG. 6 and FIG. 7, an operation procedure for performing full-scale projection in the present embodiment will be described including steps.

  It is assumed that the projector 3 is projecting an image including an object for causing the screen 200 as a projection target surface to perform full size projection. FIG. 7 illustrates an input for causing the control unit 70 to project an object in a projected image with a predetermined size (actual size) based on an input signal from the user's remote control device 91. The operation procedure after that is shown as follows. It is assumed that the zoom lens 61 is manually rotated to set the projection size, and the focus lens 62 is manually rotated to adjust the focus of the projected image.

  Further, regarding the same parts as those in the flowchart showing the operation procedure in the second embodiment shown in FIG. 4, a simple explanation or explanation will be omitted as appropriate.

  In step S300 and step S301, the distance data to the screen 200 is obtained by the distance acquisition means (the reflection type infrared sensor and the distance processing unit (CPU 71) of the distance detection unit 80) as in steps S200 and S201 shown in FIG. To get. Next, the process proceeds to step S302.

  Step S300 corresponds to the distance detection process, and step S301 corresponds to the distance processing process. Moreover, a distance acquisition process is comprised by a distance detection process and a distance processing process.

  In step S <b> 302, the CPU 71 drives the CCD camera of the zoom detection unit 120 to capture a projection image projected on the screen 200. Then, the captured projection image is stored in the captured image memory 130 as zoom information. Then, the CPU 71 causes the image processing unit 20 to analyze the stored image data, and detects the projection size as zoom information. Next, the process proceeds to step S303.

  In step S303, the CPU 71 reads a table indicating the correspondence between the projection size stored in the RAM 73 and the zoom magnification of the zoom lens 61 with respect to the detected projection size, and zooms corresponding to the detected projection size (zoom information). The zoom magnification (zoom data) of the lens 61 is calculated (calculated). Next, the process proceeds to step S304.

  Step S302 corresponds to the zoom detection process, and step S303 corresponds to the zoom processing process. Further, the zoom detection process and the zoom processing process constitute a zoom acquisition process.

  In step S304 and step S305, as in step S204 and step S205 shown in FIG. 4, the object acquisition means (the image processing unit 20 that operates as the object detection unit and the object processing unit) uses a predetermined amount of image information. The object is detected and object data (image size of the object with respect to the image size of the liquid crystal panel 50) is acquired. Next, the process proceeds to step S306.

  Step S304 corresponds to an object detection process, and step S305 corresponds to an object processing process. Moreover, a target object acquisition process is comprised by a target object detection process and a target object processing process.

  Note that steps S306 to S309 are the same as steps S206 to S209 shown in FIG. Each process is the same.

  In step S306, the CPU 71 operates as a size data acquisition unit. The CPU 71 reads a table indicating the correspondence between the target object and the size data of the target object from the RAM 73 as the target object storage unit, and acquires size data for the detected target object. Specifically, when the object is, for example, a personal computer, size data corresponding to the personal computer is read from the table. When the size data is, for example, 30 cm, the size data of 30 cm is acquired.

  Note that the RAM 73 serving as the object storage unit stores a table indicating correspondence between the object and the size data of the object in advance, as in the first and second embodiments. The table stores data indicating various objects and a predetermined size of each object. In the present embodiment, the actual size of the object is set as the predetermined size. Therefore, since the object is a table that matches the size of the object itself of 30 cm, the projection of the actual size is performed.

  In addition, said process to memorize | store corresponds to a target object memory | storage process. Step S306 corresponds to a size data acquisition step.

  In step S307, the CPU 71 operates as an image control unit. The CPU 71 outputs distance data (distance between the screen 200 and the projector 3) output from the distance processing unit, a zoom magnification (zoom magnification of the zoom lens 61) output from the zoom processing unit, and an object processing unit. Object data (image size of the object relative to the image size of the liquid crystal panel 50) and size data acquired from the object storage unit are input.

  Then, the CPU 71 does not change the zoom magnification (projection size) of the zoom lens 61 with respect to the screen 200 installed at the position indicated by the distance data based on the distance data, the zoom magnification, the object data, and the size data. In addition, on the liquid crystal panel 50 as a light modulation device, the image size of the object is changed (zoomed) with respect to the image size of the liquid crystal panel 50 to make the object coincide with the size data (full-size projection). The control to perform is performed.

  The CPU 71 performs zoom data (zoom magnification) of the image size of the object data relative to the image size on the liquid crystal panel 50 based on the distance data, the zoom magnification, the object data, and the size data in order to perform full size projection. ) Is calculated (calculated). Step S307 corresponds to an image control process.

  Next, in step S308, the image processing unit 20 operates as an image correction unit. Based on the zoom magnification of the object image size relative to the image size of the liquid crystal panel 50 calculated by the image control unit (CPU 71), the image processing unit 20 sets the current object image size to the calculated zoom magnification. Change (image correction). At this time, the image size of the set predetermined area including the object is changed. In addition, when the area part including the changed object is smaller than the image size of the liquid crystal panel 50, image correction is performed so that the projection result is displayed in black except for the area part. The image information subjected to the image correction is output to the liquid crystal panel driving unit 30 as an image correction signal. Note that step S308 is included in the image control process as an image correction process.

  In step S <b> 309, the liquid crystal panel driving unit 30 drives the liquid crystal panel 50 based on the image correction signal from the image processing unit 20, and the image size of the liquid crystal panel 50 includes an object that is the result of the image correction. A predetermined area portion is displayed.

  By executing the above flow, an image displayed on the liquid crystal panel 50 includes an object by modulating a light beam from the light source to form an optical image and projecting it onto the screen 200 via the projection lens 60. The predetermined area is projected in actual size. In this case, the area other than the predetermined area is projected in black. Further, since the diagram for explaining the full-scale projection of the present embodiment is the same as that of FIG. 5 in the second embodiment, the illustration and description thereof are omitted.

According to the embodiment described above, the following effects can be obtained.
(1) According to the projector 3 of the present embodiment, distance data to the screen 200 is acquired by the distance acquisition means (the reflective infrared sensor and the distance processing unit (CPU 71) of the distance detection unit 80). Then, zoom data (zoom magnification) of the projection lens 60 (zoom lens 61) is acquired by a zoom acquisition means (zoom detection unit 120 and zoom processing unit (captured image memory 130, image processing unit 20, CPU 71)). Thereafter, the projector 3 capable of efficiently projecting the target T to a predetermined area including the target T with a substantially real size is realized by the same configuration as that of the second embodiment.

  (2) A full-size projection method capable of efficiently projecting the target T to a predetermined area including the target T with a substantially real size is realized by the same process as in the second embodiment.

  (3) According to the projector 3 of the present embodiment, the distance detection unit 80 includes the distance sensor (reflective infrared sensor) and the zoom detection unit 120 includes the image sensor (CCD camera). By detecting the distance information and detecting the projection size projected on the screen 200, the zoom information of the zoom lens 61 can be detected.

  (4) According to the projector 3 of the present embodiment, an input unit (switch key) for projecting the object T at a predetermined size can be set in the remote control device 91 or the like. When the user wants to project the object T in the projected image with a predetermined size (in the present embodiment, the actual size), the user projects the object T with the predetermined size. By pressing this switch key, there is no need for visual adjustment and the like, and the object T can be projected in a predetermined size (actual size in this embodiment) easily and reliably. Therefore, an efficient presentation can be performed.

  The present invention is not limited to the above-described embodiments, and various changes and improvements can be added. A modification will be described below.

  (Modification 1) In the first embodiment, in step S106, the CPU 71 drives the zoom lens driving unit 100 to move the zoom lens 61 to the initial setting position. Thereafter, in step S107, the CPU 71 drives the zoom lens driving unit 100 to move the zoom lens 61 so that the calculated zoom magnification is obtained. However, the present invention is not limited to this, and the zoom magnification corresponding to the currently projected projection size (projection size A shown in FIG. 3A) is read as data by the zoom lens position detection unit 110, and the calculated zoom magnification is obtained. It is also possible to calculate (calculate) a correction amount for this purpose. Detailed description will be given below.

  The CPU 71 operates as a correction processing unit. The CPU 71 calculates (calculates) a correction amount for changing the current zoom magnification to the calculated zoom magnification based on the zoom magnification calculated by the image control unit (CPU 71). Specifically, when the current zoom magnification is 5 times and the calculated magnification is 3 times, the CPU 71 uses a rotary encoder to correct the 5 times zoom magnification to 3 times the zoom magnification. On the other hand, it calculates (calculates) how much correction amount (the amount of movement of the zoom lens 61 with respect to the current zoom lens 61 position) is necessary. In addition, when such calculation of the correction amount is set as a correction processing step, the correction processing step is included in the image control step.

  Next, the CPU 71 outputs a signal corresponding to the calculated correction amount to the zoom lens driving unit 100. Then, the zoom lens driving unit 100 is realized by driving the zoom lens 61 (moving the zoom lens 61) in accordance with the input correction amount signal.

  By performing such processing, the projection size (FIG. 3B) corresponding to the calculated zoom magnification can be obtained smoothly from the current projection size (projection size A shown in FIG. 3A) without performing step S106. ) Can be changed to the projection size B).

  (Modification 2) In the modification 1, the zoom detection unit (zoom lens position detection unit 110) includes a rotary encoder, but the zoom lens position detection unit 110 includes the zoom detection unit 120 of the third embodiment. A CCD camera as an image sensor may be provided. At this time, the projection size is detected in the same manner as in the third embodiment, and the object T is detected by the image control unit (CPU 71) based on the distance data, the object data, and the size data. The zoom magnification with respect to the zoom lens 61 for projecting onto the projection target surface is calculated (calculated) so as to be substantially the same as the size data. Then, the zoom lens driving unit 100 projects an image while driving the zoom lens 61. Then, the projected image (projection size) is sequentially captured by the CCD camera, analyzed by the image processing unit 20, and the image control unit (CPU 71) determines whether or not the result of the analysis is the calculated zoom magnification. By controlling the zoom lens driving unit 100 while making the determination, the object T can be projected at a predetermined size.

  (Modification 3) In the present embodiment, projectors 1, 2, 3 and a projection method capable of efficiently projecting the object T in actual size are realized. However, the present invention is not limited to this, and projection can be performed with a predetermined size. In that case, it is performed by storing various types of objects T and data indicating a predetermined size of each object T in a table stored in the RAM 73 as the object storage unit. Thereby, the target T can be projected in a size desired by the user. In addition, an input of a predetermined size can be input using an on-screen function or the like. Accordingly, it is possible to realize a projector and a projection method that can efficiently project the object T at a predetermined size.

(Modification 4) In the above-described embodiment, the projection size fits within the screen 200 when the object T is projected in actual size. However, the present invention is not limited to this, and the projection size may be larger than that of the screen 200 when the object T is projected in actual size. Therefore, the case where the screen 200 with a limited size is used and the case where a wall surface larger than the screen 200 is used as the projection target surface are appropriately selected according to the actual size of the target T. Is good.
For example, when projecting a full-scale object such as a car or furniture as the object T, it is preferable to project using a wall surface or the like as the object to be projected, and even if there is no actual object in a limited space. Since the large size can be confirmed, the effect of using the present invention becomes extremely high. The same applies to the case where the object T is projected with a predetermined size.

  (Modification 5) In the second embodiment, the full size projection is a predetermined area including the object T included in the image, and this predetermined area is the entire projected image before the full size projection. May be set as a predetermined area, or an area including only the object T, not the entire image, may be set as the predetermined area. The same applies to the case where the object T is projected with a predetermined size.

  (Modification 6) In the second embodiment, when the image processing unit 20 operates as an image correction unit, the region including the changed target T is smaller than the image size of the liquid crystal panel 50. In this case, image correction is performed so that the projection result is black display (area D) except for the area. However, when the region including the target T to be projected in actual size is larger than the image size of the liquid crystal panel 50, the entire target T is not displayed on the liquid crystal panel 50, and the target Image correction for displaying the portion T may be used. As a result, the entire object T is not projected on the screen 200, but the portion of the object T is projected. The same applies to the case where the object T is projected with a predetermined size.

  (Modification 7) In the above-described embodiment, the distance detector 80 includes a reflective infrared sensor as a distance sensor, but may include a sensor using ultrasonic waves or a laser.

  (Modification 8) In the first and second embodiments, the zoom lens position detection unit 110 includes a rotary encoder as a position sensor that detects the movement position of the zoom lens 61. However, a linear encoder may be included.

  (Modification 9) In the third embodiment, the zoom detection unit 120 includes a CCD camera (CCD image sensor) as an imaging sensor, but may include a complementary metal oxide semiconductor (CMOS) image sensor.

  (Modification 10) In the above embodiment, the distance acquisition means includes a distance sensor. However, as a distance acquisition unit, the user may input the distance between the screen 200 and the projectors 1, 2, and 3 using the remote control device 91 or the like.

  (Modification 11) In the second and third embodiments, the zoom acquisition means includes a position sensor and an image sensor. However, the zoom magnification of the zoom lens 61 may be input by the user using the remote control device 91 or the like. The same applies to the first modification.

  (Modification 12) In the above embodiment, the liquid crystal panel 50 as the light modulation device uses the transmissive liquid crystal panel 50, but a reflective light modulation element such as a reflective liquid crystal panel can also be used. It is. Further, a minute mirror array device that modulates the light beam emitted from the light source by controlling the emission direction of the incident light for each micromirror serving as a pixel may be used.

  (Modification 13) Although the present invention is applied to the projectors 1, 2, and 3 of the embodiment as a front type projector, it can also be applied to a rear type projector integrally having a screen as a projection target surface. In this case, the distance data in the distance acquisition unit and the zoom data in the zoom acquisition unit are set to predetermined values according to the specifications of the rear type projector. Further, the present invention can be similarly applied to a front type projector that does not include the zoom lens 61.

1 is a schematic configuration diagram of a projector according to a first embodiment of the invention. The flowchart which shows the operation | movement procedure which performs full size projection. It is a figure explaining projection of a full size, (a) is a figure which shows the state currently projected, (b) is a figure which shows the state which performed full size projection. 9 is a flowchart showing an operation procedure for performing full size projection according to the second embodiment of the present invention. It is a figure explaining projection of a full size, (a) is a figure which shows the state currently projected, (b) is a figure which shows the state which performed full size projection. The schematic block diagram of the projector which concerns on 3rd Embodiment of this invention. The flowchart which shows the operation | movement procedure which performs full size projection.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 2, 3 ... Projector, 10 ... A / D conversion part, 20 ... Image processing part, 30 ... Liquid crystal panel drive part, 40 ... Illumination optical system, 50 ... Liquid crystal panel, 60 ... Projection lens, 61 ... Zoom lens, 62 ... Focus lens, 70 ... Control unit, 71 ... CPU, 72 ... ROM, 73 ... RAM, 80 ... Distance detection unit, 90 ... Remote control unit, 91 ... Remote control device, 100 ... Zoom lens driving unit, 110 ... Zoom lens Position detection unit, 120 ... zoom detection unit, 130 ... captured image memory, 200 ... screen, T ... target.

Claims (11)

A projector that modulates a light beam emitted from a light source with a light modulation device based on image information to form an optical image, and projects it as an image on a projection target surface through a projection lens,
Distance acquisition means for acquiring distance data to the projection target surface;
Object acquisition means for detecting a predetermined object from the image information and acquiring object data;
An object storage unit for storing size data of the object;
A size data obtaining unit for obtaining the size data corresponding to the object data from the object storage unit;
Based on the distance data acquired by the distance acquisition unit, the target data acquired by the target acquisition unit, and the size data of the target acquired by the size data acquisition unit, the target An image control unit that calculates and controls zoom data for the projection lens for projecting onto the projection target surface such that an object has a size that substantially matches the size data of the object;
A projection lens driving unit configured to drive the projection lens based on the zoom data calculated by the image control unit; A projector that modulates a light beam emitted from a light source with a light modulation device based on image information to form an optical image, and projects it as an image on a projection target surface through a projection lens,
Distance acquisition means for acquiring distance data to the projection target surface;
Zoom acquisition means for acquiring zoom data of the projection lens;
Object acquisition means for detecting a predetermined object from the image information and acquiring object data;
An object storage unit for storing size data of the object;
A size data obtaining unit for obtaining the size data corresponding to the object data from the object storage unit;
The distance data acquired by the distance acquisition unit, the zoom data acquired by the zoom acquisition unit, the target data acquired by the target acquisition unit, and the target acquired by the size data acquisition unit Based on the size data of the light modulation device, the image with respect to the image size of the light modulation device for projecting the object onto the projection target surface so that the size of the object is substantially the same as the size data of the object. An image control unit that calculates zoom data of the image size of the target object data and performs control to send image information obtained by zooming a predetermined region including the target object to the light modulation device based on the zoom data; A projector comprising: The projector according to claim 1,
The distance acquisition means includes a distance detection unit that detects distance information to the projection target surface, and a distance processing unit that processes the distance information detected by the distance detection unit as the distance data.
The target acquisition means includes a target detection unit for detecting target information of the predetermined target from the image information, and a target for processing the target information detected by the target detection unit as the target data A projector. The projector according to claim 2,
The distance acquisition means includes a distance detection unit that detects distance information to the projection target surface, and a distance processing unit that processes the distance information detected by the distance detection unit as the distance data.
The zoom acquisition unit includes a zoom detection unit that detects zoom information of the projection lens, and a zoom processing unit that processes the zoom information detected by the zoom detection unit as the zoom data,
The target acquisition means includes a target detection unit for detecting target information of the predetermined target from the image information, and a target for processing the target information detected by the target detection unit as the target data A projector. The projector according to claim 3, wherein
The distance detection unit includes a distance sensor that uses reflection of light. The projector according to claim 4,
The distance detection unit includes a distance sensor that utilizes reflection of light,
The zoom detection unit includes a position sensor that detects a movement position of the projection lens. The projector according to claim 4,
The distance detection unit includes a distance sensor that utilizes reflection of light,
The projector according to claim 1, wherein the zoom detection unit includes an image sensor that detects a projection size projected on the projection target surface. A projector projection method,
A distance acquisition step of acquiring distance data to the projection target surface;
A target acquisition step of detecting a predetermined target from image information and acquiring target data;
An object storage step of storing size data of the object;
A size data acquisition step of acquiring the size data corresponding to the target data from the size data stored in the target object storage step;
Based on the distance data acquired in the distance acquisition step, the target data acquired in the target acquisition step, and the size data of the target acquired in the size data acquisition step, the target An image control step of calculating and controlling zoom data for the projection lens for causing the object to be projected onto the projection target surface such that the object has a size that substantially matches the size data of the object;
A projection lens driving step of driving the projection lens based on the zoom data calculated in the image control step. A projector projection method,
A distance acquisition step of acquiring distance data to the projection target surface;
A zoom acquisition step of acquiring zoom data of the projection lens;
A target acquisition step of detecting a predetermined target from image information and acquiring target data;
An object storage step of storing size data of the object;
A size data acquisition step of acquiring the size data corresponding to the target data from the size data stored in the target object storage step;
The distance data acquired in the distance acquisition step, the zoom data acquired in the zoom acquisition step, the target data acquired in the target acquisition step, and the target acquired in the size data acquisition step. The object with respect to the image size of the light modulation device for projecting the object onto the projection target surface so that the object has a size substantially matching the size data of the object based on the size data of An image control step of calculating zoom data of the image size of the object data and performing control to send image information obtained by zooming a predetermined area including the object to the light modulation device based on the zoom data; A projector projection method characterized by comprising: A projector projection method according to claim 8, comprising:
The distance acquisition step includes a distance detection step of detecting distance information to the projection target surface, and a distance processing step of processing the distance information detected in the distance detection step as the distance data,
The target acquisition step includes a target detection step of detecting target information of the predetermined target from the image information, and a target of processing the target information detected in the target detection step as the target data. A projector processing method comprising: an object processing step. A projector projection method according to claim 9, comprising:
The distance acquisition step includes a distance detection step of detecting distance information to the projection target surface, and a distance processing step of processing the distance information detected in the distance detection step as the distance data,
The zoom acquisition step includes a zoom detection step of detecting zoom information of the projection lens, and a zoom processing step of processing the zoom information detected in the zoom detection step as the zoom data,
The target acquisition step includes a target detection step of detecting target information of the predetermined target from the image information, and a target of processing the target information detected in the target detection step as the target data. A projector processing method comprising: an object processing step.

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