JP2007178939A - Image display device and retinal scanning image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device and a retinal scanning type image display device that can have a prism with a projection part for securing the optical path of image light arranged suitably, even when the user is wearing spectacles. <P>SOLUTION: The prism 150 of the retinal scanning type image display device 1 has a first plane 152, which is a surface perpendicular to the gaze direction of the user 50 and on which external light Z1 is made incident, a second plane 154 which projects the external light Z1 made incident from the first plane 152 to the eyes of the user 50, and the projection part 158 which is formed on the side of the second plane 154 and guides the image light projected from a projection device 100. The prism is arranged, having the side of the second plane 154 where the projection part 158 is not provided, facing a lens 202L of the spectacles 200 of the user 50. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image display device and a retinal scanning image display device, and in particular, an image display device and a retina that display an image by emitting image light according to an image signal and reflecting the image light. The present invention relates to a scanning image display apparatus.

  2. Description of the Related Art Conventionally, an image display device for displaying an image displays an image by image light emitted in accordance with an image signal related to the image or external light from the outside, and makes it possible to visually recognize the state of the outside. There is a device.

  In such an image display device, for example, as shown in Patent Document 1, a device is disclosed in which emitted image light is reflected by a mirror and guided to a user's eye through a lens and a spectacle lens. Yes. The image light reflected by the mirror is guided to the lens and the spectacle lens. However, external light from the outside world is guided to the user's eye through the spectacle lens without passing through the lens.

Further, in the image display device disclosed in Patent Document 1, since the size of a mirror or the like must be increased, an output device that emits image light in accordance with an image signal related to an image, and the image light is reflected. In addition, there is an image display device including a prism that transmits external light from the outside world and guides it to the user's eyes, and an image based on the image light and an image based on the external light (state of the outside world) can be viewed on the same region. Become. The prism in such an image display device is a surface that is perpendicular to the user's line-of-sight direction, and includes a first plane and a second plane that transmit external light, and a first plane or a second plane. Protrusions for ensuring the optical path of the image light, half mirrors for reflecting the image light and transmitting the external light, and the like are formed on either one of them.
JP-T-2001-522064

  However, in the image display device as described above, when the user wears spectacles, if the projection is brought into contact with the spectacle lens, the projection may cause damage to the spectacle lens, and the prism is not disposed. Since there is a risk of stabilization and interference of image light, it is desired that the prism be disposed at a suitable position even when the user wears spectacles.

  The present invention has been made in view of the above-described problems, and even when a user wears spectacles, a prism having a protrusion for securing an optical path of image light is preferably disposed. An object of the present invention is to provide an image display device and a retinal scanning image display device that can be used.

  In order to achieve the above object, the present invention provides the following.

  That is, according to the first aspect of the present invention, an emission device that emits image light in accordance with an image signal, the image light emitted from the emission device, and the image light are reflected toward the user's eyes. In the image display device including the prism, the prism is a surface perpendicular to the user's line-of-sight direction, the first plane on which external light from the outside is incident, and the user's line-of-sight direction A second plane from which the external light incident from the first plane is emitted to the user's eyes, and either the first plane side or the second plane side. And a projection for guiding image light emitted from the emission device, wherein the prism is provided on the first plane side and the second plane side where the projection is not provided. Either one of them faces the lens of the user's glasses The image display apparatus characterized by being arranged so.

  In the present invention described in claim 2, the image display device according to claim 1, wherein the first plane and the second plane are parallel to each other.

  The image display device according to claim 1 or 2, wherein the emission device emits image light from a side of a user.

  According to a fourth aspect of the present invention, the emission device emits image light from a plane side on which the projections are provided toward a plane side on which the projections are not provided. Item 4. The image display device according to any one of Items 1 to 3.

  Further, in the present invention according to claim 5, the portion where the image light emitted from the emitting device is guided to the outside from the prism toward the user's eyes is formed as a surface perpendicular to the user's line-of-sight direction. The image display device according to claim 1, wherein the image display device is provided.

  Further, in the present invention according to claim 6, the prism is provided between a half mirror provided in an oblique direction with respect to the user, and between the protrusion and the end portion of the half mirror, and the line of sight of the user 6. The image display device according to claim 1, further comprising a third plane perpendicular to the first plane.

  The image according to claim 6, wherein the third plane has a length arranged at a position where the protrusion does not enter a user's viewing angle. Display device.

  Further, in the present invention according to claim 8, when the prism is disposed facing the outside of the user's glasses, the projection is disposed forward. The image display device according to claim 1.

  Further, in the present invention according to claim 9, the emission device faces the outer side of the spectacle vine, and the prism can be attached to and detached from the spectacles with the prism facing the front of the spectacle lens. Item 9. The image display device according to Item 8.

  The image display device according to claim 8 or 9, further comprising a slide mechanism capable of sliding the emission device and the prism in a front-rear direction of a user.

  Further, in the present invention according to claim 11, at least a part of the image light emitted from the emitting device can be emitted to the user's eye by one total reflection, and The image display device according to claim 8, wherein the image display device has a shape capable of securing a user's viewing angle.

  Further, in the present invention according to claim 12, when the prism is disposed facing the inner side of the user's glasses, the protrusion is disposed rearward. The image display device according to claim 1.

  Further, in the present invention according to claim 13, the prism is disposed in such a manner that the image light emitted from the emitting device does not interfere with the vine of the glasses. Display device.

  The image display device according to claim 13, wherein the prism is disposed at a predetermined angle upward or downward toward the outside with respect to the user.

  Further, in the present invention according to claim 15, the image display apparatus according to claim 14, wherein the image is rotated and displayed in accordance with an angle at which the prism is disposed.

  According to a sixteenth aspect of the present invention, the image display device according to any one of the first to fifteenth aspects is provided, and image light modulated in accordance with an image signal is scanned and emitted to the prism. A retinal scanning image display apparatus, wherein an image is projected onto a retina of at least one eye of a user and the image is displayed.

  According to the first or sixteenth aspect of the invention, the prism is a surface perpendicular to the user's line-of-sight direction, the first plane on which external light from the outside is incident, and the user's line-of-sight direction. A second surface from which the external light incident from the first plane is emitted to the user's eyes, the first plane side, or the second plane side. And a protrusion for guiding image light. Further, the prism is disposed with the other of the first plane side and the second plane side where no protrusion is provided facing the lens of the user's glasses. Therefore, a projection for securing the optical path of the image light emitted from the emission device and guiding the image light is provided, and either the first plane side or the second plane side where the projection is not provided is provided. If the other side faces the lens of the user's glasses, even if the user wears the glasses, the projection lens may damage the lens of the glasses or the arrangement of the prism may become unstable. The possibility of interference of light can be eliminated, a sufficient optical path for image light can be secured, and a prism provided with a projection for guiding the image light can be suitably disposed.

  According to the invention of claim 2 or 16, the first plane and the second plane are parallel. Therefore, it is possible to prevent image distortion based on external light.

  According to the invention described in claim 3 or 16, the emission device emits image light from the side of the user. Accordingly, it is possible to prevent interference between image light and external light. Of course, there are few opportunities to restrict the operation of the user, and the emission device can be arranged.

  According to the invention described in claim 4 or 16, the emitting device emits the image light from the flat surface side where the protruding portion is provided toward the flat surface side where the protruding portion is not provided. Accordingly, since the image light is emitted from the plane side on which the projection portion that guides the image light is provided, the projection portion can sufficiently secure the optical path of the image light and can efficiently guide the image light.

  According to the fifth or thirteenth aspect of the present invention, the portion where the image light is guided to the outside from the prism toward the user's eyes is formed as a plane perpendicular to the user's line-of-sight direction. Therefore, image distortion based on image light can be prevented. In addition, this portion becomes the second plane, and image distortion based on external light can also be prevented.

  According to invention of Claim 6 or 16, a prism is provided between the half mirror provided in the diagonal direction with respect to the user, and the protrusion part and the edge part of a half mirror, and it is in a user's gaze direction. And a third plane perpendicular to the first plane. Therefore, since the third plane perpendicular to the user's line-of-sight direction is provided between the protrusion and the end of the half mirror, the protrusion is difficult to enter at the user's viewing angle, and the protrusion at the user's viewing angle. In the case where does not enter, it is possible to prevent protrusions from entering an image based on external light.

  According to the invention described in claim 7 or 16, the third plane is a length arranged at a position where the protrusion does not enter the viewing angle of the user. Therefore, since the protrusion is reliably disposed at a position where the projection angle does not enter the viewing angle of the user, it is possible to prevent the protrusion from entering the image based on the external light.

  According to the invention described in claim 8 or 16, when the prism is disposed facing the outside of the user's glasses, the protrusion is disposed forward. Therefore, the projection is directed forward, and the second plane faces from the outside of the glasses, and a prism provided with a projection that guides image light is suitable even when the user wears glasses. It can be arranged.

  According to the invention described in claim 9 or 16, it is possible to make the emitting device face the outer side of the spectacle vine and to attach / detach the spectacle to the spectacle with the prism facing the front of the spectacle lens. Therefore, the emitting device and the prism can be stably disposed so as to cover the lens and the vine of the spectacles. Further, it can be easily detached and is convenient.

  According to the tenth or sixteenth aspect of the present invention, the slide mechanism is provided that can slide the emitting device and the prism in the front-back direction of the user. Therefore, by sliding the emitting device and the prism in the front-rear direction, the distance between the prism and the user's eyes can be adjusted, and an image based on the image light can be easily visually recognized.

  According to the invention described in claim 11 or 16, the protrusion can emit at least part of the image light emitted from the emitting device to the user's eye with one total reflection, and It is a shape which can ensure a user's viewing angle. Therefore, it is possible to easily guide the image light efficiently by the protrusions.

  According to the twelfth or sixteenth aspect of the present invention, when the prism is disposed so as to face the inner side of the user's glasses, the protrusion is disposed rearward. Accordingly, the protrusion is directed rearward and the first plane faces from the inside of the glasses, and a prism provided with a protrusion for guiding image light is suitable even when the user wears the glasses. It can be arranged. Further, since the prism can be disposed close to the user's eye, the thickness of the prism can be reduced.

  According to invention of Claim 13 or 16, a prism is arrange | positioned in the aspect which the image light radiate | emitted from an output device does not interfere with the vine of spectacles. Therefore, an image based on image light can be displayed normally.

  According to the fourteenth or sixteenth aspect, the prism is disposed at a predetermined angle upward or downward toward the outside with respect to the user. Accordingly, it is possible to prevent the interference of the image light due to the vine of the glasses. In particular, the prism is easily supported by being disposed at a predetermined angle upward toward the outside with respect to the user.

  According to the fifteenth or sixteenth aspect of the present invention, the image is rotated and displayed in accordance with the angle at which the prism is disposed. Therefore, an image can be displayed horizontally by rotating and displaying an image according to the angle at which the prism is disposed even for a prism that is not disposed horizontally.

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

[Configuration of image display device]
Hereinafter, an embodiment of an image display device and a retinal scanning image display device according to the present invention will be described with reference to the drawings. First, the configuration of a retinal scanning display 1 that is an example of an image display device according to the present invention will be described with reference to FIGS. 1 and 2.

  The retinal scanning display 1 scans and emits beam light (hereinafter, also referred to as image light Z2 (see FIG. 2)) modulated in accordance with an image signal related to an image, thereby allowing a user 50 (observer). ) Projects an image on the retina of at least one of the eyes and displays (projects and displays) the image. As shown in FIG. 1, the retinal scanning display 1 emits an image light Z2 in accordance with an image signal related to an image, guides the image light Z2 emitted from the emission device 100, and displays the image light Z2. The prism 150 reflects the light Z <b> 2 toward the eyes of the user 50.

  The retinal scanning display 1 can be attached to a user 50 wearing glasses 200. The retinal scanning display 1 is mounted obliquely so as to face upward toward the outside of the user 50. In this embodiment, as shown in FIG. 2, the prism 150 is arranged on the inner side 210 of the lens 202 </ b> L of the glasses 200. In order not to interfere, the retinal scanning display 1 is mounted not upward in the horizontal direction but toward the outside of the user 50 as shown in FIG. By mounting the retinal scanning display 1 in this manner, the prism 150 described later is disposed in a manner in which the image light Z2 emitted from the emission device 100 does not interfere with the vine 204L of the glasses 200. An image based on Z2 can be displayed normally. Although details will be described later with reference to FIG. 4, in this case, since the scanning line is inclined, the image is displayed obliquely, that is, rotated, so that the input image is reversed so as to cancel the rotation. A normal image can be displayed by rotating and correcting.

  As will be described in detail later, the emitting device 100 scans the image light Z2 modulated in accordance with the image signal relating to the image and emits it to the prism 150. The prism 150 is fixed to the emission device 100, guides the image light Z2 emitted from the emission device 100, and reflects the image light Z2 toward the eyes of the user 50. The prism 150 transmits external light Z1 from the outside and guides it to the eyes of the user 50.

  As described above, the emission device 100 as described above includes a support portion 130 for supporting the emission device 100. A groove 132 is formed in the support portion 130. By inserting the vine 204 </ b> L of the glasses 200 into the groove 132 and fixing the support 130 to the vine 204 </ b> L of the glasses 200, the emission device 100 is attached to the glasses 200. That is, the retinal scanning display 1 can attach and detach the emitting device 100 to the glasses 200. Therefore, when the vine 204L of the glasses 200 is inserted into the groove 132 and the support portion 130 is fixed to the vine 204L of the glasses 200, it can be easily detached and simple.

  Further, since the vine 204 </ b> L of the glasses 200 can slide along the groove 132, the emitting device 100 can slide in the front-rear direction (the direction indicated by the arrow A) with respect to the user 50. Further, since the prism 150 is fixed to the emitting device 100, the retinal scanning display 1 has a slide function that allows the emitting device 100 and the prism 150 to slide in the front-rear direction with respect to the user 50. In addition, the support part 130 (especially groove | channel 132) in this embodiment is corresponded to an example of a slide function. Therefore, by sliding the emitting device 100 and the prism 150 in the front-rear direction, the distance between the prism 150 and the eyes of the user 50 can be adjusted, and an image based on the image light Z2 can be easily visually recognized.

  In this embodiment, the retinal scanning display 1 is slidable in the front-rear direction with respect to the user 50 as indicated by the arrow A. However, the present invention is not limited to this. It is good also as a structure which can be displaced (sliding). As a result, the position where the image light Z2 is incident can be adjusted by sliding the prism 150 to the side with respect to the user 50, and the image based on the image light Z2 can be easily visually recognized. In addition, for example, a configuration may be provided that includes not only one of these but also both. Of course, there is no problem as long as the retinal scanning display 1 can be mounted at an appropriate position.

  In addition, the emission device 100 emits the image light Z <b> 2 from the side of the user 50 toward the prism 150. Therefore, the interference of the image light Z2 and the external light Z1 can be prevented. Of course, there are few opportunities to restrict the operation of the user 50, and the emission device 100 can be arranged.

  In addition, the emitting device 100 emits the image light Z2 from the second plane 154 side where the projections 158 are provided toward the first plane 152 side where the projections 158 are not provided. Accordingly, since the image light Z2 is emitted from the second flat surface 154 side where the projection 158 for guiding the image light Z2 is provided, the projection 158 sufficiently secures the optical path of the image light Z2 and efficiently uses the image light Z2. Can guide well.

  The prism 150 as described above is disposed on the user 50 side (inner side 210) with respect to the lens 202L of the glasses 200. The prism 150 is an optical system that causes the image light Z2 incident from the side of the user 50 to enter the eyes of the user 50 and the external light Z1 from the outside to the eyes of the user 50, and of course the actual field of view. That is, an image based on the image light Z2 emitted from the emission device 100 can be visually recognized.

  The prism 150 includes a first plane 152 on which external light Z1 from the outside is incident, and a second plane 154 from which the external light Z1 incident on the first plane 152 is emitted toward the user's 50 eye. A projection 158 provided on the second plane 154 side for guiding the image light Z2 emitted from the emission device 100, a third plane 156 provided between the second plane 154 and the projection 158, external light A half mirror 162 that guides the external light Z1 and the image light Z2 to the eyes of the user 50 by transmitting Z1 and reflecting the image light Z2 is provided.

  The first plane 152 is disposed so as to face the lens 202L of the glasses 200. The first plane 152 is arranged as a plane perpendicular to the viewing direction of the user 50 (a plane perpendicular to the user 50) so as not to distort the image based on the external light Z1. External light Z1 from the outside is incident on the first plane 152. That is, the prism 150 is a surface perpendicular to the direction of the line of sight of the user 50, and has a first plane 152 on which external light Z1 from the outside is incident. Note that a protrusion such as the protrusion 158 is not formed on the first flat surface 152 side of the prism 150, and the lens 202L of the glasses 200 is not damaged.

  The second plane 154 is disposed so as to face the eyes of the user 50 without facing the lens 202L of the glasses 200. Similarly to the first plane 152, the second plane 154 is a plane perpendicular to the line of sight of the user 50 (perpendicular to the user 50) in order not to distort the image based on the external light Z1. It is arranged as a flat surface. From the second plane 154, the external light Z1 incident on the prism 150 from the first plane 152 is emitted. That is, the prism 150 is a surface perpendicular to the line-of-sight direction of the user 50 and has the second plane 154 from which the external light Z1 incident from the first plane 152 is emitted to the eyes of the user 50. is doing. In addition, since the first plane 152 and the second plane 154 are parallel, distortion of an image based on external light can be prevented.

  Further, from the second plane 154, the image light Z2 emitted from the emission device 100 and incident on the prism 150 from an image light incident surface 160 described later is emitted toward the eyes of the user 50. That is, the portion where the image light Z2 emitted from the emission device 100 is guided to the outside of the prism 150 toward the user 50's eyes is formed as a second plane 154 perpendicular to the user's 50 line-of-sight direction. Yes. Therefore, distortion of an image based on the image light Z2 and an image based on the external light Z1 can be prevented. In addition, a protrusion 158 is formed on the second flat surface 154 side of the prism 150.

  Similarly to the second plane 154, the third plane 156 is disposed so as to face the eyes of the user 50 without facing the lens 202L of the glasses 200. The third plane 156 is formed on the second plane 154 side as the same plane as the second plane 154. As with the first plane 152 and the second plane 154, the third plane 156 is a plane perpendicular to the line-of-sight direction of the user 50 in order not to distort the image based on the external light Z1 ( It is arranged as a plane perpendicular to the user 50. The third plane 156 is formed between the second plane 154 and the protrusion 158. That is, the prism 150 has a third plane that is provided between the protrusion 158 formed on the second plane 154 side and the second plane 154 and is perpendicular to the line-of-sight direction of the user 50. It becomes. Therefore, since the third plane 156 perpendicular to the direction of the line of sight of the user 50 is provided between the projection 158 and the second plane 154, the projection 158 is unlikely to enter the viewing angle of the user 50. When the projection 158 does not enter the viewing angle of 50, the projection 158 can be prevented from entering the image based on the external light Z1.

  The third plane 156 has a boundary line provided between the projection 158 and the second plane by the user 50 when a projection 158 described later is disposed within the viewing angle range of the user 50. Since there exists a possibility that it may become visually recognizable, the projection part 158 mentioned later is formed in order to position it outside the viewing angle range of the user 50. FIG. That is, the third plane 156 has a length that is disposed at a position where the protrusion 158 does not enter the viewing angle of the user 50. Accordingly, since the protrusion 158 is reliably disposed at a position where the viewing angle of the user 50 does not enter, it is possible to prevent the protrusion 158 from entering the image based on the external light Z1.

  The protrusion 158 is formed on the second plane 154 side. The protrusion 158 is convex toward the user 50 and has a triangular cross section. The protrusion 158 has an image light incident surface 160 on the side where the second flat surface 154 is not formed, on which the image light Z2 emitted from the emission device 100 is incident. The image light incident surface 160 is formed to be inclined with respect to the user 50. The image light incident surface 160 faces not the first plane 152 side but the second plane 154 side (user 50 side). Further, as described above, the emission device 100 emits the image light Z2 from the second plane 154 side where the projections 158 are provided toward the first plane 152 side where the projections 158 are not provided. . For this reason, the projection 158 has a sufficient incidence angle and incidence area compared with the case where the projection 158 is incident from the direction perpendicular to the line of sight of the user 50, and reduces the number of total reflections in the prism 150. The image light Z2 can be guided to the eyes of the user 50. Accordingly, since the image light Z2 is emitted from the second flat surface 154 side where the projection 158 for guiding the image light Z2 is provided, the projection 158 sufficiently secures the optical path of the image light Z2 and efficiently uses the image light Z2. Can guide well.

  Further, by forming the projection 158 having such a shape, the image light Z2 emitted from the emission device 100 can be emitted to the eyes of the user 50 with one to four total reflections. In addition, the viewing angle of the user 50 can be secured. In other words, the prism 150 (protrusion 158) can emit at least part of the image light Z2 emitted from the emission device 100 to the eyes of the user 50 by one total reflection, and the user 50's It is a shape that can ensure a viewing angle. Therefore, the image light Z2 can be efficiently guided by the protrusions 358.

  As described above, the prism 150 is formed on the second plane 154 side, and has the protrusion 158 for guiding the image light Z2 emitted from the emission device 100.

  The half mirror 162 is provided obliquely with respect to the direction of the line of sight of the user 50, totally reflects the image light Z2 from the emission device 100 incident from the side, and transmits the external light Z1 from the outside. . As a result, the half mirror 162 emits the external light Z1 and the image light Z2 from the second plane 154 to the eyes of the user 50. That is, the prism 150 includes a half mirror 162 provided in an oblique direction with respect to the user 50.

  As described above, the highly effective protrusion 158 is formed on the prism 150, but the first flat surface 152 side where the protrusion 158 is not provided is disposed to face the lens 202 </ b> L of the eyeglass 200 of the user 50. It was. In other words, when the prism 150 is disposed so as to face the inner side 210 of the eyeglasses 200 of the user 50, the protrusion 158 is disposed rearward (in the direction of the user 50). Therefore, a projection 158 is provided for securing the optical path of the image light Z2 emitted from the emission device 100 and guiding the image light Z2, and the first plane 152 side where the projection 158 is not provided is arranged on the user side. By facing the lens 202L of the 50 eyeglasses 200, even if the user 50 wears the eyeglasses 200, the projections 158 may damage the lens 202L of the eyeglasses 200, and the arrangement of the prism 150 is unstable. And the possibility of interfering with the image light Z2 can be eliminated, the Z2 optical path of the image light is sufficiently secured, and the prism 150 provided with the projection 158 for guiding the image light Z2 is preferably disposed. be able to. Further, since the protrusion 158 faces rearward and the first plane 152 faces from the inner side 210 of the glasses 200, the prism 150 can be disposed close to the eyes of the user 50. The thickness of 150 can be made small (thin).

[Electrical configuration of image display device]
The electrical configuration of the retinal scanning display 1 in the present embodiment, mainly the electrical configuration of the emission device 100, and the like will be described with reference to FIG.

  As shown in FIG. 3, the retinal scanning display 1 includes an emission device 100 and a prism 150. Further, the emission device 100 is provided with a light source unit 2 for processing a video signal supplied from the outside. The light source unit 2 is provided with a video signal supply circuit 3 that receives an external video signal and generates each signal as an element for synthesizing the video based on the video signal. A signal 4, a horizontal synchronization signal 5, and a vertical synchronization signal 6 are output. The light source unit 2 also includes lasers that are intensity-modulated based on the red (R), green (G), and blue (B) video signals transmitted from the video signal supply circuit 3 as video signals 4. An R laser driver 10, a G laser driver 9, and a B laser driver 8 for driving the R laser 13, the G laser 12, and the B laser 11 are provided so as to emit light. Further, the collimating optical system 14 provided so as to collimate the laser light emitted from each laser into parallel light, the dichroic mirror 15 for combining the collimated laser lights, and the combined laser light as light. A coupling optical system 16 leading to the fiber 17 is provided. As the R laser 13, G laser 12, and B laser 11, a semiconductor laser such as a laser diode or a solid-state laser may be used. The light source unit 2 in this embodiment corresponds to an example of a modulation unit that modulates the intensity of at least one light source and beam light (light beam) emitted from the light source in accordance with an image signal.

  Further, the emission device 100 of the retinal scanning display 1 includes a first relay optical system 18 that guides the laser light propagated from the light source unit 2 to the horizontal scanning system 19, and a collimated laser light through a galvano mirror 19a. A horizontal scanning system 19 that scans in the horizontal direction using the second relay optical system 20 that guides the laser beam scanned by the horizontal scanning system 19 to the vertical scanning system 21 and the horizontal scanning system 19 scans the second relay. The vertical scanning system 21 that scans the laser light incident through the optical system 20 in the vertical direction using the galvano mirror 21a and the laser light scanned by the vertical scanning system 21 are incident on the pupil 24 of the user. The third relay optical system 22 is provided. The second relay optical system 20 is conjugated with the galvano mirror 19a of the horizontal scanning system 19 and the galvano mirror 21a of the vertical scanning system 21, and the third relay optical system 22 is galvano mirror 21a with the user. These pupils 24 are provided so as to be conjugate with each other.

  The prism 150 is disposed between the third relay optical system 22 and the user's pupil 24, and guides the image light Z2 emitted from the emission device 100 to the user's pupil 24 by total reflection or the like. It becomes.

  As a specific example, the horizontal scanning system 19 is an optical system that horizontally scans a laser beam in the horizontal direction (an example of primary scanning) for each scanning line of an image to be displayed. The horizontal scanning system 19 includes a galvano mirror 19a that scans the laser beam in the horizontal direction, and a horizontal scanning control circuit 19c that controls driving of the galvano mirror 19a.

  On the other hand, the vertical scanning system 21 is an optical system that vertically scans the laser beam from the first scanning line toward the last scanning line (an example of secondary scanning) for each frame of an image to be displayed. is there. The vertical scanning system 21 includes a galvano mirror 21a that performs vertical scanning, and a vertical scanning control circuit 21c that controls driving of the galvano mirror 21a.

  The horizontal scanning system 19 is designed to scan the laser beam at a higher speed, that is, at a higher frequency than the vertical scanning system 21. Further, as shown in FIG. 3, the horizontal scanning system 19 and the vertical scanning system 21 are respectively connected to the video signal supply circuit 3 and are respectively supplied to the horizontal synchronization signal 5 and the vertical synchronization signal 6 output from the video signal supply circuit 3. The laser beam is scanned in synchronization.

  The horizontal scanning system 19 and the vertical scanning system 21 in this embodiment scan the incident beam light in a primary direction and a secondary direction substantially perpendicular to the primary direction, thereby forming a frame. It is an example of a scanning device. The horizontal scanning system 19 in the present embodiment corresponds to an example of a primary scanning unit that scans incident beam light in the horizontal direction, and the vertical scanning system 21 in the present embodiment is scanned in the horizontal direction. This corresponds to an example of secondary scanning means for scanning the light beam in the vertical direction.

  Next, a process from when the retinal scanning display 1 according to the embodiment of the present invention receives an image signal from the outside until it projects an image on the retina of the user will be described with reference to FIG.

  As shown in FIG. 3, in the retinal scanning display 1 of the present embodiment, when the video signal supply circuit 3 provided in the light source unit 2 is supplied with an external video signal, the video signal supply circuit 3 A video signal 4 including an R video signal, a G video signal, and a B video signal, a horizontal synchronizing signal 5 and a vertical synchronizing signal 6 for outputting laser beams of red, green, and blue colors are output. The R laser driver 10, the G laser driver 9, and the B laser driver 8 respectively drive the R laser 13, the G laser 12, and the B laser 11 based on the input R video signal, G video signal, and B video signal. Output a signal. Based on this drive signal, the R laser 13, the G laser 12, and the B laser 11 each generate intensity-modulated laser light and output each to the collimating optical system 14. The video signal supply circuit 3 controls the timing of generating laser light and outputting each to the collimating optical system 14 in accordance with a BD signal (not shown) indicating a driving state of a galvano mirror 19a described later. That is, such a retinal scanning display 1 (video signal supply circuit 3) controls the timing at which beam light is emitted to the galvanometer mirror 19a or the like. The laser light generated from the point light source is collimated into parallel light by the collimating optical system 14, and is further incident on the dichroic mirror 15 to be combined into one beam light, and then combined by the coupling optical system 16. It is guided to enter the optical fiber 17.

  The laser light propagated by the optical fiber 17 is guided from the optical fiber 17 by the first relay optical system 18 and emitted to the horizontal scanning system 19. The emitted laser light is incident on the deflection surface 19b of the galvanometer mirror 19a of the horizontal scanning system 19. The laser beam incident on the deflecting surface 19b of the galvano mirror 19a is scanned in the horizontal direction in synchronization with the horizontal synchronizing signal and enters the deflecting surface 21b of the galvano mirror 21a of the vertical scanning system 21 via the second relay optical system 20. . In the second relay optical system 20, the deflection surface 19b of the galvanometer mirror 19a and the deflection surface 21b of the galvanometer mirror 21a are adjusted to have a conjugate relationship, and the surface tilt of the galvanometer mirror 19a is corrected. The galvanometer mirror 21a is reciprocally oscillated so that the deflection surface 21b reflects incident light in the vertical direction in synchronization with the vertical synchronization signal 6 in the same manner as the galvanometer mirror 19a synchronizes with the horizontal synchronization signal. Laser light is scanned in the vertical direction by the galvanometer mirror 21a. Laser light that is two-dimensionally scanned in the vertical and horizontal directions by the horizontal scanning system 19 and the vertical scanning system 21 is provided so that the deflection surface 21b of the galvano mirror 21a and the pupil 24 of the user have a conjugate relationship. The light is incident on the user's pupil 24 by the third relay optical system 22 and the prism 150, and is projected onto the retina. Thus, the user can recognize the image by the laser light that is two-dimensionally scanned and projected onto the retina. The galvanometer mirror 19a of the horizontal scanning system 19 and the galvanometer mirror 21a of the vertical scanning system 21 have the same names, but their reflecting surfaces are swung (rotated) so as to scan light. It goes without saying that any drive system such as a resonance type, non-resonance type, piezoelectric drive, electromagnetic drive, electrostatic drive, or the like may be used.

  In the present embodiment, since the retinal scanning display 1 is attached to the user 50 at an angle, the image to be displayed is displayed at an angle. Specifically, when the retinal scanning display is mounted horizontally with respect to the user 50, as shown in FIG. 4 (A), the display area in which the image light Z2 is scanned in the horizontal direction and the image is displayed. 80, but when the retinal scanning display 1 is mounted obliquely with respect to the user 50, the image light Z2 is not scanned horizontally, as shown in FIG. When the display area 80 is scanned and tilted horizontally, the second display area 82 is formed at a horizontal angle when the display area 80 is mounted obliquely. Only the image 82 corrected to a horizontal angle is reduced and displayed. (In addition, an image is not displayed in a portion outside the display area 82 in the display area 80, for example, a constant color such as black is displayed.) In this case, the light source unit 2 described above has a predetermined (corrects the slant). The second display area 82 is formed by generating an image signal tilted at an angle. However, the second display area 82 is not limited to this. For example, the second display area 82 is obliquely corrected by optically correcting the tilt of the image light (beam light). The display area may be formed at a horizontal angle when mounted on the display. Thus, even when the retinal scanning display 1 is attached to the user 50 at an angle, an image can be displayed. That is, when the prism 150 is disposed at a predetermined angle upward or downward toward the outside with respect to the user 50, the retinal scanning display 1 displays an image according to the angle at which the prism 150 is disposed. Is rotated and displayed so as to correct the angle. Accordingly, it is possible to prevent the interference of the image light due to the vine of the glasses. In particular, the prism is easily supported by being disposed at a predetermined angle upward toward the outside with respect to the user. Further, even for prisms that are not arranged horizontally, the image can be displayed horizontally by rotating the image so as to correct the angle according to the angle at which the prism is arranged. it can.

[Second Embodiment]
In the above-described embodiment, the prism 150 is arranged on the inner side 210 of the lens 202L of the spectacles 200. However, the present invention is not limited to this. For example, the prism 150 may be arranged on the outer side 212 of the lens 202L of the spectacles 200. . Specifically, the second embodiment will be described below with reference to FIG. In order to facilitate understanding of the invention, description of the same configuration as that of the above-described embodiment will be omitted.

  The emission device 300 emits the image light Z2 from the first plane 352 side where the projections 358 are provided toward the second plane 354 side where the projections 358 are not provided. Accordingly, since the image light Z2 is emitted from the first flat surface 352 side where the projection 358 for guiding the image light Z2 is provided, the projection 358 sufficiently secures the optical path of the image light Z2, and the image light Z2 is efficiently used. Can guide well.

  The prism 350 is disposed on the opposite side (outer side 212) from the user 50 with respect to the lens 202L of the glasses 200.

  The prism 350 includes a first flat surface 352 on which external light Z1 from the outside is incident, a second flat surface 354 from which the external light Z1 incident on the first flat surface 352 is emitted toward the eyes of the user 50, A projection 358 provided on the first plane 352 side for guiding the image light Z2 emitted from the emission device 300, a third plane 356 provided between the first plane 352 and the projection 358, external light A half mirror 362 that guides the external light Z1 and the image light Z2 to the eyes of the user 50 by transmitting Z1 and reflecting the image light Z2 is provided.

  The first plane 352 is disposed so as not to face the lens 202 </ b> L of the glasses 200 and to face in the direction opposite to the eyes of the user 50. Further, a protrusion 358 is formed on the first flat surface 352 side of the prism 350.

  The second plane 354 is disposed so as to face the lens 202L of the glasses 200. Note that no protrusion such as the protrusion 358 is formed on the second flat surface 354 side of the prism 350, and the lens 202L of the glasses 200 is not damaged.

  Similarly to the first plane 352, the third plane 356 is disposed so as not to face the lens 202L of the glasses 200 but in the direction opposite to the eye of the user 50. The third plane 356 is formed on the first plane 352 side as the same plane as the first plane 352. The third plane 356 is formed between the first plane 352 and the protrusion 358. In other words, the third plane 356 is formed between the end 362 a of the half mirror 362 and the protrusion 358. That is, the prism 350 is provided between the protrusion 358 formed on the first plane 352 side and the end 362a (first plane 352) of the half mirror 362, and is in the direction of the line of sight of the user 50. It will have a third vertical plane. Therefore, since the third plane 356 perpendicular to the line-of-sight direction of the user 50 is provided between the protrusion 358 and the end 362a (first plane 352) of the half mirror 362, the viewing angle of the user 50 When the projection 358 is difficult to enter and the projection 358 does not enter the viewing angle of the user 50, the projection 358 can be prevented from entering the image based on the external light Z1.

  The protrusion 358 is formed on the first plane 352 side. The protrusion 358 is convex on the opposite side of the user 50 and has a triangular cross section. The protrusion 358 has an image light incident surface 360 for allowing the image light Z2 emitted from the emission device 300 to enter the side where the first flat surface 352 is not formed. The image light incident surface 360 is formed so as to be inclined with respect to the user 50. The image light incident surface 360 faces not the second plane 354 side but the first plane 352 side (the side opposite to the user 50). Further, as described above, the emission device 300 emits the image light Z2 from the first plane 352 side where the projections 358 are provided toward the second plane 354 side where the projections 358 are not provided. . For this reason, the projection 358 has a margin in the incident angle and the incident area as compared with the case where the projection 358 is incident from the direction perpendicular to the direction of the line of sight of the user 50, and reduces the number of total reflections in the prism 150. The image light Z2 can be guided to the eyes of the user 50. Accordingly, since the image light Z2 is emitted from the first flat surface 352 side where the projection 358 for guiding the image light Z2 is provided, the projection 358 sufficiently secures the optical path of the image light Z2, and the image light Z2 is efficiently used. Can guide well.

  Further, by forming the projection 358 having such a shape, the image light Z2 emitted from the emission device 300 can be emitted to the eyes of the user 50 with one to three total reflections. In addition, the viewing angle of the user 50 can be secured. In other words, the prism 350 (projection 358) can emit at least part of the image light Z2 emitted from the emission device 300 to the eyes of the user 50 by one total reflection, and the user 50's It is a shape that can ensure a viewing angle. Therefore, the image light Z2 can be efficiently guided by the protrusions 358.

  As described above, the prism 350 is formed on the first plane 352 side, and includes the protrusion 358 for guiding the image light Z2 emitted from the emission device 300.

  As described above, the highly effective protrusion 358 is formed on the prism 350, but the second flat surface 354 side where the protrusion 358 is not provided is disposed so as to face the lens 202L of the eyeglass 200 of the user 50. It was. In other words, when the prism 350 is disposed so as to face the outer side 212 of the eyeglass 200 of the user 50, the protrusion 358 is disposed toward the front (in the direction opposite to the user 50). Therefore, the projection 358 for securing the optical path of the image light Z2 emitted from the emission device 300 and guiding the image light Z2 is provided, and the second plane 354 side where the projection 358 is not provided is arranged on the user side. By facing the lens 202L of the 50 eyeglasses 200, even if the user 50 wears the eyeglasses 200, the projections 358 may damage the lens 202L of the eyeglasses 200, and the arrangement of the prism 350 is unstable. And the possibility of interfering with the image light Z2 can be eliminated, the Z2 optical path of the image light is sufficiently secured, and the prism 350 provided with the projection 358 for guiding the image light Z2 is preferably disposed. be able to.

  Further, since the emission device 300 faces the outside of the vine 204L of the spectacles 200 and the prism 350 faces the lens 202L front of the spectacles 200 and can be attached to and detached from the spectacles 200, the emission device 300 and the prism 350 are connected to the spectacles 200. It is possible to stably dispose 200 lenses 202L and vines 204L. Further, it can be easily detached and is convenient.

[Other Embodiments]
In the above-described embodiment, the emission devices 100 and 300 and the prisms 150 and 350 are mounted on the oblique side of the user 50, and image light is applied to the prisms 150 and 350 from the side of the user 50 by the emission devices 100 and 300. However, the present invention is not limited to this. For example, when the prism 350 is disposed so as to face the outer side 212 of the eyeglasses 200 of the user 50, the protrusion 358 is disposed toward the front. As shown in FIG. 6, the emission devices 100 and 300 and the prisms 150 and 350 may be mounted horizontally to the side without being inclined. Further, for example, the emission devices 100 and 300 may be mounted above the user 50, and image light may be emitted from above the user 50 toward the prisms 150 and 350 by the emission devices 100 and 300.

  Furthermore, in the above-described embodiment, the retinal scanning display 1, 99 is directly attached to the eyeglass 200, but if the user 50 wearing the eyeglass 200 can attach the retinal scanning display 1, 99, this is used. It is not limited to any configuration. Further, for example, there is no problem even if the retina scanning display 1, 99 is configured not to slide with respect to the user 50.

  Furthermore, in the above-described embodiment, the image based on the image light is displayed only on the left eye of the user 50. However, the present invention is not limited to this. For example, the image based on the image light is displayed only on the right eye of the user 50. May be. Of course, an image based on image light may be displayed on both eyes of the user 50.

  Furthermore, in the above-described embodiment, the image is projected onto the retina of at least one eye of the user by scanning in the two-dimensional direction and emitted to the prisms 150 and 350, and the retina scanning type displays the image. Although the present invention is adopted for the displays 1 and 99, the present invention is not limited to this.

  As described above, some of the embodiments of the present invention have been described in detail with reference to the drawings. The present invention can be implemented in other forms that have been modified or improved.

It is an external view which shows the retinal scanning display in this embodiment. It is an external view which shows the retinal scanning display in this embodiment. It is explanatory drawing which shows the retinal scanning display in this embodiment. It is explanatory drawing which shows the display area of the image in the retinal scanning display in this embodiment. It is an external view which shows the retinal scanning display in this embodiment. It is an external view which shows the retinal scanning display in this embodiment.

Explanation of symbols

1,99 Retina scanning display 50 User 100,300 Emitting device 150,350 Prism 152,352 First plane 154,354 Second plane 156,356 Third plane 158,358 Protrusion 160,360 Image light incidence Surface 162,362 Half mirror 200 Glasses Z1 Outside light Z2 Image light

Claims (16)

An emission device that emits image light according to an image signal;
In the image display device comprising the prism that guides the image light emitted from the emission device and reflects the image light toward the user's eyes,
The prism is
A first plane that is a plane perpendicular to the user's line-of-sight direction and from which external light from the outside is incident;
A second plane, which is a plane perpendicular to the user's line-of-sight direction, and external light incident from the first plane is emitted to the user's eyes;
A projection portion that is formed on either the first plane side or the second plane side and guides the image light emitted from the emission device;
The prism is arranged such that one of the first plane side and the second plane side on which the protrusion is not provided is opposed to a lens of a user's glasses. apparatus.   The image display apparatus according to claim 1, wherein the first plane and the second plane are parallel to each other.   The image display device according to claim 1, wherein the emission device emits image light from a side of a user.   4. The image according to claim 1, wherein the emission device emits image light from a plane side on which the protrusion is provided toward a plane on which the protrusion is not provided. 5. Display device.   The portion where the image light emitted from the emitting device is guided to the outside from the prism toward the user's eyes is formed as a surface perpendicular to the user's line-of-sight direction. 5. The image display device according to any one of 4. The prism is
A half mirror provided obliquely to the user;
6. The device according to claim 1, further comprising: a third plane that is provided between the protrusion and the end of the half mirror and is perpendicular to the direction of the user's line of sight. The image display device described in 1.   The image display apparatus according to claim 6, wherein the third plane has a length arranged at a position where the protrusion does not enter a user's viewing angle.   The said prism is arrange | positioned toward the front, when the said prism is arrange | positioned facing the outer side of a user's spectacles, The any one of Claim 1 to 7 characterized by the above-mentioned. The image display device described.   9. The image display device according to claim 8, wherein the light emitting device faces the outer side of a spectacle vine, and the prism faces the front of a spectacle lens and can be attached to and detached from the spectacles.   The image display device according to claim 8, further comprising a slide mechanism capable of sliding the emission device and the prism in a front-rear direction of a user.   The protrusion has a shape that allows at least a part of the image light emitted from the emission device to be emitted to the user's eye with one total reflection and secures the user's viewing angle. The image display device according to claim 8, wherein:   The said prism is arrange | positioned toward the back, when the said prism is arrange | positioned facing the inner side of a user's spectacles, The projection part is arrange | positioned toward back. The image display device described.   The image display device according to claim 12, wherein the prism is arranged in a manner in which image light emitted from the emission device does not interfere with a vine of the glasses.   The image display device according to claim 13, wherein the prism is disposed at a predetermined angle upward or downward toward the outside with respect to the user.   The image display device according to claim 14, wherein an image is rotated and displayed according to an angle at which the prism is disposed. An image display device according to any one of claims 1 to 15, comprising: image light modulated in accordance with an image signal is scanned and emitted to the prism, whereby the retina of at least one eye of a user is emitted. A retinal scanning image display device that projects an image and displays the image.

Images