JP2015179201A - screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen which is manufactured at lower costs compared with conventional products and offers improved foreground visibility.SOLUTION: A screen 100 of the present invention comprises a transparent base material 110 and a plurality of diffuse-reflection layers 120 for diffusely reflecting projection light which are arrayed, on a side of the base material 110 for projecting images, at layer pitches Pv and Ph smaller than a pixel pitch of pixels, each diffuse-reflection layer 120 having a vertical size Mv in a direction perpendicular to an arrayed direction and a horizontal size Mh in a direction parallel thereto that are smaller than the layer pitch Pv and layer pitch Ph, respectively.

Description

  The present invention relates to a screen capable of improving the foreground visibility on the back side of the screen.

  2. Description of the Related Art Conventionally, there has been known a screen that allows a user to visually recognize a scene on the back side of the screen and to project a projected image by projecting the image on the screen. For example, Patent Document 1 describes a screen using a hologram element. This screen transmits background light on the back side of the screen and combines linearly polarized light transmitted from a transmitting means on the hologram element. Image. Therefore, the user can visually recognize the background and visually recognize the image projected on the hologram element.

JP-A-8-201718

  However, since the screen disclosed in Patent Document 1 uses a hologram element, the material cost and the manufacturing cost are high. Further, since the hologram is an organic substance, it has low durability and cannot be used for a long time. Furthermore, although the screen constituted by the hologram element transmits the background light, if the transmittance of the background light is low, it becomes difficult for the user to visually recognize the foreground.

  An object of the present invention made in view of such a viewpoint is to provide a screen capable of reducing the cost and improving the foreground visibility compared to the conventional art.

In order to solve the above problem, a screen according to a first invention is:
A permeable substrate;
The substrate is arranged with a layer pitch equal to or less than the pixel pitch of the image on the side on which the image is projected onto the screen, and a vertical dimension and a horizontal horizontal dimension that are perpendicular to the arrangement direction are shorter than the layer pitch, respectively. And a plurality of diffuse reflection layers that diffusely reflect the projection light.

The screen according to the second invention is
The vertical dimension and the horizontal dimension of the diffuse reflection layer are each less than half of the layer pitch.

The screen according to the third invention is
A light shielding layer for blocking incident light from the base material side is further provided between the base material and each of the diffuse reflection layers.

The screen according to the fourth invention is
Each of the diffuse reflection layers is arranged on the substrate by a combination of a plurality of different layer pitches.

  According to the screen according to the first aspect of the present invention, the diffuse reflection layer can be manufactured by a method that suppresses the material cost as compared with the conventional method and suppresses the manufacturing cost. Further, since the diffuse reflection layers that reflect the projection light are arranged discretely instead of the entire screen, the cost of the screen can be further reduced. In addition, since the portion where the diffuse reflection layer is not arranged on the screen has transparency, the foreground visibility is improved.

  Moreover, according to the screen which concerns on 2nd invention, since both the vertical dimension and horizontal dimension of a screen become a base material which has transparency, foreground visibility is further improved.

  Further, according to the screen of the third invention, the light shielding layer blocks the incident light from the foreground, so that even if the light is incident from the foreground, the user hardly impairs the visibility of the image projected on the screen. .

  Further, according to the screen of the fourth invention, the layer pitch of the diffuse reflection layer arranged on the base material and the pixel pitch of the image projected from the projector can be shifted, and moire due to interference of both pitches can be reduced. It can be avoided. Therefore, it is difficult for the user to impair the visibility of the image projected on the screen.

It is a figure which shows the example which mounted the screen which concerns on one embodiment of this invention in the one part area | region of the front window of a vehicle. It is an enlarged view which shows typically a part of structural example of the screen which concerns on one embodiment of this invention. It is a figure which shows typically the usage example of the screen which concerns on one embodiment of this invention. It is a figure which shows the example of the image projected on a screen. It is a schematic diagram which shows a part of structural example of the screen which shows the modification of a diffuse reflection layer. It is a front view which shows typically a part of structural example of the screen which shows the modification of the arrangement | sequence of a diffuse reflection layer. It is a side view which shows typically the structural example of a laminated glass provided with a screen.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an example in which a screen according to an embodiment of the present invention is mounted in a partial area of a front window of a car. As shown in FIG. 1, a front window 140 of a car includes a screen 100 according to the present embodiment in a partial area thereof. The vehicle includes an instrument panel 150 made of, for example, resin at the front of the passenger compartment. The instrument panel 150 includes an instrument on the driver's seat side and a meter hood 152 that protects the instrument on the upper side of the instrument. In addition, the instrument panel 150 includes a projector 130. The projector 130 is, for example, a liquid crystal projector, and enlarges an image by projecting projection light 131 of an image generated by the liquid crystal display onto the screen 100 from a hole 151 provided in the instrument panel 150. It is displayed on the screen 100. In the present embodiment, the user of the screen 100 is a driver 160, and the driver 160 can see the image projected by the projector 130 on the screen 100.

  FIG. 2 is an enlarged view schematically showing a part of the configuration example of the screen according to the embodiment of the present invention. FIG. 2A shows a front view of the screen 100, and FIG. 2B shows a side view of the screen 100. As shown in FIG. 2, the screen 100 includes a base material 110 and a plurality of diffuse reflection layers 120 arranged on the base material 110. The diffuse reflection layer 120 is provided on the base 110 on the side (front side) where the image is projected, that is, the side on which the user visually recognizes the image.

  The substrate 110 is made of a permeable material. In the present embodiment, a part of the transparent front window 140 is used as the base material 110 of the screen 100.

  The diffuse reflection layer 120 is a layer that diffusely reflects the projection light 131 of the projector 130. The diffuse reflection layers 120 are arranged with a layer pitch equal to or less than the pixel pitch of the image. In the present embodiment, the diffuse reflection layer 120 is provided on the surface of the base 110 on the vehicle interior side at equal intervals in the vertical and horizontal directions with layer pitches Pv and Ph, respectively. In the present embodiment, the diffuse reflection layer 120 is, for example, a rectangle having vertical and horizontal horizontal dimensions Mv and Mh in the arrangement direction. The vertical dimension Mv and the horizontal dimension Mh are shorter than the layer pitches Pv and Ph, respectively. In this way, by arranging the diffuse reflection layers 120 at a pixel pitch or less, all the pixels included in the projection light 131 are diffusely reflected by any of the plurality of diffuse reflection layers 120 without omission. Further, by making the vertical dimension Mv and the horizontal dimension Mh of the diffuse reflection layer 120 shorter than the layer pitches Pv and Ph, respectively, a gap is formed between the diffuse reflection layers 120. Therefore, the user can visually recognize the foreground on the back side of the screen 100 through the transparent base material 110 from the gap.

  The vertical dimension Mv and the horizontal dimension Mh of each diffuse reflection layer 120 can be, for example, less than half of the layer pitches Pv and Ph, respectively. Thereby, since half or more of the vertical dimension Mv and the horizontal dimension Mh of the screen 100 becomes the base material 110 having transparency, the foreground visibility is further improved. Moreover, it is preferable that the vertical dimension Mv and the horizontal dimension Mh of the diffuse reflection layer 120 are sufficiently small particularly for the resolution of the eyes of the user. As a result, the user is not aware of the presence of the diffuse reflection layer 120 when viewing the screen 100.

  In the present embodiment, since the screen 100 is provided in a partial region of the front window 140, the vertical dimension Mv and the horizontal dimension Mh of the diffuse reflection layer 120 and the layer pitch Pv between the diffuse reflection layers 120 and For example, Ph is determined so as to satisfy the requirements stipulated in laws and regulations relating to the transmittance of the front window 140.

  Based on the above-described conditions, the layer pitches Pv and Ph are preferably in the range of 50 μm to 300 μm, for example. In the present embodiment, for example, the diffuse reflection layer 120 is a square having a vertical dimension Mv and a horizontal dimension Mh of 100 μm, respectively, and layer pitches Pv and Ph are arranged at equal intervals of 300 μm. FIG. 2A shows a diagram in which nine diffuse reflection layers 120 are arranged, but FIG. 2A shows only a part of the screen 100, and actually the screen 100 In accordance with the size, the pattern of the diffuse reflection layer 120 shown in FIG.

  The diffuse reflection layer 120 is formed on the screen 100 by printing, applying, spraying, or the like with an opaque white, silver, or black ink material. That is, the diffuse reflection layer 120 can be manufactured by a method in which the material cost is lower than the conventional one and the manufacturing cost is reduced. Further, since the diffuse reflection layer 120 is arranged discretely instead of the entire screen 100, the manufacturing cost of the screen 100 can be suppressed.

  As shown in FIG. 2, the screen 100 according to the present embodiment further includes a light shielding layer 121 between the substrate 110 and each of the diffuse reflection layers 120. The light shielding layer 121 is a layer that blocks incident light from the base material 110 side (back side) of the screen 100. Although the size and shape of the light shielding layer 121 can be arbitrarily determined, in order to prevent light from entering the diffuse reflection layer 120 from the back side of the screen 100, it is preferable that the light shield layer 121 be at least larger than the diffuse reflection layer 120. On the other hand, since the user cannot visually recognize the foreground on the back side from the portion where the light shielding layer 121 is provided on the screen 100, it is preferable that the light shielding layer 121 is made small. Therefore, it is preferable that the light shielding layer 121 is as small as possible while covering the diffuse reflection layer 120.

  The light shielding layer 121 is formed by printing, applying or spraying a material such as opaque black ink.

  By providing the light shielding layer 121 on the screen 100, even when light is incident from the back side of the screen 100, the diffuse reflection layer 120 is not affected by the incident light from the back side. It is difficult to impair the visibility of the displayed image.

  FIG. 3 is a diagram schematically illustrating a usage example of the screen according to the embodiment of the present invention. Here, the function of the screen 100 will be described with reference to FIG. In FIG. 3, the driver 160 travels using a vehicle having a screen 100 in a partial area of the front window 140. In FIG. 3, the front window 140 is not shown. For the sake of explanation, the screen 100 is shown enlarged.

  When the image is not projected on the screen 100, the driver 160 can visually recognize the foreground on the back side of the screen 100 through a portion of the screen 100 where the diffuse reflection layer 120 is not provided. For example, as shown in FIG. 3, if there is a tree 210 on the back side of the screen 100, the driver 160 can visually recognize the tree 210 through the transparent substrate 110 through the screen 100.

  On the other hand, when an image is projected on the screen 100, the projection light 131 projected from the projector 130 is projected onto the diffuse reflection layer 120. In the diffuse reflection layer 120, the projection light 131 is diffusely reflected as diffuse reflection light 132. The driver 160 can recognize the image projected on the screen 100 by visually recognizing the diffuse reflected light 132 incident on the field of view. At this time, even if, for example, sunlight 220 is incident on the screen 100 from the back side of the screen 100, the light shielding layer 121 blocks the incidence of the sunlight 220 on the diffuse reflection layer 120. Regardless of the influence, it is difficult to impair the visibility of the image projected on the screen 100.

  FIG. 4 is a diagram illustrating an example of an image projected on the screen. The driver 160 looks at the screen 100 and, for example, as shown in FIG. 4 (a), traveling information necessary during driving, such as a guidance display shown by a car navigation system, a traveling speed of a car, and a speed limit of a road that is traveling Can be confirmed.

  The driver 160 during driving needs to check traveling information while checking the front. By displaying the travel information on the screen 100 included in the front window 140 as described above, for example, the travel information is displayed in front of the driver 160 as compared with the case where the travel information is displayed on the instrument of the instrument panel 150 or the like. It is displayed at a position close to the viewpoint. Therefore, the driver 160 can reduce the movement of the viewpoint for confirming the traveling information, and as a result, can drive more safely. Further, since the driving information is displayed at a position close to the viewpoint in front of the driver 160, the driver 160 can easily focus on the screen 100 when the viewpoint is moved to the screen 100 indicating the driving information. Travel information can be confirmed.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each means can be rearranged so as not to be logically contradictory, and a plurality of means can be combined into one or divided.

  For example, the diffuse reflection layer 120 is not limited to the one shown in the above embodiment. FIG. 5 is a schematic diagram illustrating a part of a configuration example of a screen showing a modification of the diffuse reflection layer. In the above-described embodiment, it has been described that two different layers of the diffuse reflection layer 120 and the light shielding layer 121 are provided on the substrate 110. For example, as illustrated in the side view of FIG. You may provide the light-shielding diffuse reflection layer 122 which has a function of these two layers on the base material 110. The light shielding diffuse reflection layer 122 diffuses and reflects the projection light 131 of the projector 130 and blocks incident light from the back side of the screen 100. By using the light shielding diffuse reflection layer 122, the thickness of the entire screen 100 can be reduced.

  In the above-described embodiment, the diffuse reflection layer 120 has been described as a square having the same vertical dimension and horizontal dimension. However, for example, the diffuse reflection layer 120 is a rectangle such as a rectangle having different vertical dimensions Mv and horizontal dimensions Mh. Also good. For example, the shape of the diffuse reflection layer 120 is not limited to a rectangle, and may be a circle or any other shape as shown in the front view of FIG. Furthermore, the diffuse reflection layers 120 having different shapes may be mixed on the substrate 110.

  Further, the arrangement of the diffuse reflection layer 120 is not limited to that shown in the above-described embodiment. For example, the diffuse reflection layer 120 may be arranged on the substrate 110 by a combination of a plurality of different layer pitches. FIG. 6 is a front view schematically showing a part of a configuration example of a screen showing a modified example of the arrangement of the diffuse reflection layers 120. For example, as shown in FIG. 6, the diffuse reflection layer 120 may be regularly or irregularly arranged by combining three layer pitches Ph1, Ph2, and Ph3 having different lengths. Thereby, the layer pitch of the diffuse reflection layer 120 arranged on the substrate 110 and the pixel pitch of the image projected from the projector 130 can be shifted. As a result, moire due to interference between both pitches can be avoided, and the user is unlikely to lose visibility of the image projected on the screen 100.

  The arrangement of the diffuse reflection layer 120 is not limited to the combination of the three layer pitches described above, and may be a combination of any number of two or more layer pitches. Further, the diffuse reflection layers 120 may be arranged at arbitrary intervals without setting the layer pitch interval. Further, the diffuse reflection layers 120 may be arranged at unequal intervals in the vertical direction as well as in the horizontal direction.

  Moreover, in the above-mentioned embodiment, although the example which comprised the screen 100 using the single layer glass as the base material 110 was demonstrated, it is not limited on a single layer glass that the screen 100 is comprised. For example, the screen 100 can also be configured with laminated glass. FIG. 7 is a side view schematically illustrating a configuration example of a laminated glass including a screen. Referring to FIG. 7, the laminated glass includes two sheets of glass and a permeable adhesive layer 170 therebetween. Here, in any of FIGS. 7A, 7 </ b> B, and 7 </ b> C, it is assumed that an image is projected from the right side of the figure. That is, the user can see the projected image by viewing the screen 100 of FIGS. 7A, 7B, and 7C from the right side. When the screen 100 of FIGS. 7A, 7B, and 7C is configured in a partial region of the front window 140 of the car as in the above-described embodiment, of the two glasses of laminated glass The left glass is the outside glass and the right glass is the inside glass.

  FIG. 7A shows a screen 100 configured by providing a diffuse reflection layer 120 on the surface of the vehicle interior side of the glass outside the vehicle interior. In this case, the glass on the outside of the passenger compartment serves as the base material 110 of the screen 100, and the light shielding layer 121 and the diffuse reflection layer 120 are sequentially provided in the adhesive layer 170 on the base material 110.

  FIG. 7B shows a screen 100 configured by providing a diffuse reflection layer 120 on the surface of the vehicle interior side glass outside the vehicle interior. In this case, the glass on the outside of the vehicle interior serves as the substrate 110 of the screen 100, but the diffuse reflection layer 120 is provided in the adhesive layer 170 on the surface of the glass on the vehicle interior side outside the vehicle interior. The light shielding layer 121 is provided outside the passenger compartment of the diffuse reflection layer 120 in contact with the diffuse reflection layer 120.

  FIG. 7C shows a screen 100 configured by providing a diffuse reflection layer 120 on the surface of the vehicle interior side glass on the vehicle interior side. In this case, the glass on the vehicle interior side becomes the base material 110 of the screen 100, and the light shielding layer 121 and the diffuse reflection layer 120 are sequentially provided in the vehicle interior on the base material 110.

  In the above-described embodiment, the screen 100 is provided in a partial area of the front window 140. However, the screen 100 is not necessarily provided in the entire partial area of the front window 140. For example, as shown in FIG. 4B, when segment display is performed on the front window 140, the diffuse reflection layer 120 may be provided only in a portion of the front window 140 where segment display is performed. Thereby, since the diffuse reflection layer 120 is not arranged in a portion where no display is performed, the foreground visibility is further improved.

  In the above-described embodiment, the diffuse reflection layer 120 is arranged in a partial region of the front window 140 of the car and configured as the screen 100. However, the screen 100 is configured by the front window 140 of the car. Not limited to. For example, the window glass can be configured as the screen 100 by arranging the diffuse reflection layer 120 on a window glass or the like in a conference room.

100 Screen 110 Base material 120 Diffuse reflection layer 121 Light shielding layer 122 Light shielding diffuse reflection layer 130 Projector 131 Projection light 132 Diffuse reflection light 140 Front window 150 Instrument panel 151 Hole 152 Meter hood 160 Driver 170 Adhesion layer 210 Tree 220 Sunlight

Claims (4)

A permeable substrate;
The substrate is arranged with a layer pitch equal to or less than the pixel pitch of the image on the side on which the image is projected onto the screen, and a vertical dimension and a horizontal horizontal dimension that are perpendicular to the arrangement direction are shorter than the layer pitch, respectively. And a screen comprising a plurality of diffuse reflection layers that diffusely reflect the projection light.   The screen according to claim 1, wherein a vertical dimension and a horizontal dimension of the diffuse reflection layer are each equal to or less than half of the layer pitch.   The screen according to claim 1, further comprising a light shielding layer that blocks incident light from the base material side between the base material and each of the diffuse reflection layers.   4. The screen according to claim 1, wherein each of the diffuse reflection layers is arranged on the base material by a combination of a plurality of different layer pitches. 5.

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