JP2005107125A - Retina scanning display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retina scanning display device which clearly visualizes a picture without receiving an adverse effect due to brightness of the circumference. <P>SOLUTION: The retina scanning display device is provided with a modulated light output part 3 which outputs light as modulated light S modulated in accordance with picture information, a light reflection part 4 having light transparency and a scanning part 5 which irradiates the light reflection part 4 with the modulated light S, scans reflection light from the light reflection part 4 on a retina M4 and displays the picture on the retina M4. The retina scanning display device is further provided with a light intensity control means 6 which controls the intensity of the modulated light S. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a retinal scanning display device capable of directly displaying an image on a human retina.

A retinal scanning display device capable of directly displaying an image on a human retina is known (Patent Document 1).
JP 11-271666 A

  As shown in FIG. 9, the retinal scanning display device 100 has a shape in which a light reflecting portion 102 is provided in a lens portion of a device frame 101 formed in an eyeglass shape. Then, the light H modulated by the image signal is irradiated and reflected on the light reflecting portion 102, so that the light H is concentrated on the crystalline lens M3 through the pupil M2 surrounded by the iris M1 of the eye M of the user of the apparatus. An image is displayed on the retina M4.

  By the way, if the light reflecting portion 102 of the device frame 101 is formed of a translucent member, the user of the device can see the image supplied from the device and the scenery outside the device through the light reflecting portion 102. Can be visually observed. For this reason, the user of this apparatus can use it with high versatility, such as superimposing and enjoying the image supplied from this apparatus and the surrounding scenery.

  However, as described above, the conventional retinal scanning display device 100 can be used with high versatility, but the ambient light 103 from the surroundings directly passes through the light reflecting portion 102 and is directly applied to the eyes M of the user of the device. Therefore, if the surroundings become brighter than expected when the device user is viewing the image, there will be a major problem that the image will be difficult to see clearly due to the surrounding brightness. It was.

  The present invention has been made in view of the above-described prior art, and an object of the present invention is to provide a retinal scanning display device in which an image can be clearly seen without being adversely affected by ambient brightness. .

  According to the first aspect of the present invention, a modulated light output unit that outputs light as modulated light modulated according to image information, a light reflecting unit having light transmittance, and the modulated light to the light reflecting unit A retinal scanning display device including a scanning unit that scans reflected light from the light reflecting unit onto the retina and displays an image on the retina, and adjusts the intensity of the modulated light. It is characterized by comprising strength adjusting means.

  In the first aspect of the invention, the modulated light output unit modulates the light according to the image signal and outputs the modulated light. The scanning unit displays the image on the retina by irradiating the light reflecting unit with the modulated light and reflecting the modulated light. The light intensity adjusting means adjusts the intensity of the modulated light output from the modulated light output unit.

  According to a second aspect of the present invention, in the retinal scanning display device according to the first aspect of the present invention, the retinal scanning display device further includes a detection unit that detects the brightness of the outside world, and the light intensity adjusting unit The intensity of the modulated light is adjusted according to the above.

  According to a third aspect of the present invention, in the retinal scanning display device according to the second aspect, the light intensity adjusting means increases the intensity of the modulated light when the brightness of the external environment detected by the detection unit becomes brighter. It is a feature.

  According to a fourth aspect of the present invention, in the retinal scanning display device according to the second or third aspect, the light intensity adjusting unit is configured such that the brightness of the external environment detected by the detection unit is equal to or greater than a predetermined intensity for a predetermined time. When the above is continued, the intensity of the modulated light is adjusted according to the predetermined intensity.

  According to a fifth aspect of the present invention, in the retinal scanning display device according to the first aspect of the present invention, an operation unit that can be manually operated is provided, and the light intensity adjusting means corresponds to the manual operation with respect to the operation unit. It adjusts the intensity | strength of this, It is characterized by the above-mentioned.

  According to a sixth aspect of the present invention, in the retinal scanning display device according to any one of the first to fifth aspects, a light transmittance variable means for changing the light transmittance of the light reflecting portion is provided. It is a feature.

  According to a seventh aspect of the present invention, in the retinal scanning display device according to the sixth aspect, the light transmittance variable means changes the light transmittance of a portion corresponding to the entire visual field of the eye in the light reflecting portion. It is characterized by this.

  According to an eighth aspect of the present invention, in the retinal scanning display device according to the sixth aspect of the invention, the light transmittance varying means has a light transmittance of a portion corresponding to a part of the visual field of the eye in the light reflecting portion. It is characterized by changing.

  A ninth aspect of the present invention is the retinal scanning display device according to any one of the sixth to eighth aspects, further comprising a detection unit that detects the brightness of the outside world, wherein the light transmittance varying means is the The light transmittance is reduced when the brightness of the external environment detected by the detection unit exceeds a predetermined level.

  According to a tenth aspect of the present invention, there is provided a modulated light output unit that outputs light as modulated light modulated according to image information, a light reflecting unit having light transparency, and the modulated light to the light reflecting unit. A retinal scanning display device comprising: a scanning unit that scans reflected light from the light reflecting unit onto the retina and displays an image on the retina, wherein the light transmittance of the light reflecting unit is The present invention is characterized in that a light transmittance variable means for changing is provided.

  The modulated light output unit modulates the light according to the image signal and outputs the modulated light. The scanning unit displays the image on the retina by irradiating the light reflecting unit with the modulated light and reflecting the modulated light. The light transmittance varying means adjusts the light transmittance of the light reflecting portion.

  According to an eleventh aspect of the present invention, in the retinal scanning display device according to the tenth aspect, the light transmittance varying means changes the light transmittance of a portion corresponding to the entire visual field of the eye in the light reflecting portion. It is characterized by this.

  According to a twelfth aspect of the present invention, in the retinal scanning display device according to the tenth aspect of the present invention, the light transmittance varying means includes a light transmittance of a portion corresponding to a part of the visual field of the eye in the light reflecting portion. It is characterized by changing.

  A thirteenth aspect of the present invention is the retinal scanning display device according to any one of the tenth to twelfth aspects of the present invention, further comprising a detection unit that detects the brightness of the outside world, and the light transmittance varying unit includes: The light transmittance is adjusted according to the brightness of the external environment detected by the detection unit.

  According to a fourteenth aspect of the present invention, in the retinal scanning display device according to the thirteenth aspect, the light transmittance varying means reduces the light transmittance when the brightness of the external environment detected by the detection unit becomes brighter. It is a feature.

  The invention described in claim 15 is the retinal scanning display device according to claim 13 or 14, wherein the predetermined brightness is detected when the brightness of the external environment detected by the detection unit continues for a predetermined time with a predetermined intensity or more. The light transmittance is adjusted according to the intensity of the light.

  A sixteenth aspect of the present invention is the retinal scanning display device according to the tenth aspect of the present invention, further comprising an operation unit that can be manually operated, wherein the light transmittance variable stage corresponds to the manual operation on the operation unit. The transmittance is adjusted.

  According to the first aspect of the present invention, since the light intensity adjusting means for adjusting the intensity of the modulated light is provided, the intensity of the modulated light is adjusted to make the image clear regardless of the surrounding brightness. It becomes possible to see.

  According to the second aspect of the present invention, since the intensity of the modulated light is automatically adjusted according to the degree of ambient brightness, the image can be clearly seen without operation.

  According to the third aspect of the present invention, when the ambient brightness is increased, the intensity of the modulated light is automatically increased, and the image displayed on the retina can be clearly recognized.

  According to the fourth aspect of the present invention, the intensity of the modulated light is increased when the surrounding brightness exceeds a predetermined time for a predetermined time or more, so that the brightness of the image is prevented from changing suddenly. , Can make the image easier to see.

  According to the fifth aspect of the present invention, the intensity of the modulated light can be adjusted by manual operation.

  According to the sixth aspect of the present invention, the intensity of the modulated light can be adjusted and the transmittance of the external light transmitted through the light reflecting portion can be changed, so that the image can be viewed more clearly. be able to.

  According to the seventh aspect of the invention, the intensity of the modulated light can be adjusted, and the light transmittance of the portion corresponding to the entire visual field of the eye in the light reflecting portion can be changed.

  According to the eighth aspect of the invention, the intensity of the modulated light can be adjusted, and the light transmittance of a portion corresponding to a part of the visual field of the eye in the light reflecting portion can be changed. it can.

  According to the ninth aspect of the present invention, the intensity of the modulated light can be adjusted, and the light transmittance of the light reflecting portion is reduced when the brightness of the external environment exceeds a predetermined level for a predetermined period of time. Therefore, it is possible to prevent the brightness of the image from changing suddenly and to easily view the image.

  According to the tenth aspect of the present invention, since the light transmittance of the light reflecting portion can be adjusted, it becomes possible to see an image clearly regardless of the surrounding brightness.

  According to the eleventh aspect of the present invention, the light transmittance of the portion corresponding to the entire visual field of the eye in the light reflecting portion can be changed.

  According to invention of Claim 12, the light transmittance of the part corresponded to a part of visual field of the eye among the light reflection parts can be changed.

  According to the thirteenth aspect of the invention, since the light transmittance of the light reflecting portion is automatically adjusted according to the brightness of the outside world, the image can be clearly seen without being operated.

  According to the fourteenth aspect of the present invention, when the brightness of the outside world becomes brighter, the light transmittance of the light reflecting portion is automatically reduced, so that the image can be recognized clearly.

  According to the fifteenth aspect of the present invention, when the brightness of the outside world continues at a predetermined intensity or more for a predetermined time or more, the light transmittance of the light reflecting portion is adjusted, so that the brightness of the image changes abruptly. It is easy to see the image.

  According to invention of Claim 16, the light transmittance of a light reflection part can be adjusted manually as needed.

  1 to 6 show the first embodiment. The retinal scanning display device 1 of this embodiment can adjust the intensity of the modulated light S that scans the human retina according to the intensity of the external light G. FIG. It is a display device.

  As shown in FIG. 1, if the device frame 2 of the retinal scanning display device 1 of the present embodiment is formed in, for example, a glasses shape, this device user can use the device by wearing it on the head. .

  As shown in FIG. 1 or FIG. 3, the retinal scanning display device 1 includes a modulated light output unit 3, a light reflecting unit 4, a scanning unit 5, and a light intensity adjusting unit 6.

  The modulated light output unit 3 is an optical device that modulates light according to the image signal P supplied from the external device 7 and outputs the modulated light S. The light intensity adjusting means 6 is an optical device that adjusts the intensity of the modulated light S output from the modulated light output unit 3 in accordance with the intensity of the external light G, that is, the intensity of the surrounding brightness. is there.

  The light reflecting portion 4 is made of a material such as glass and has a function of transmitting light and a function of reflecting light. As shown in FIG. 1, when the apparatus frame 2 is formed in a spectacle shape, the light reflecting portion 4 is provided so as to face the eye of the apparatus user like a lens of an eyeglass.

  The scanning unit 5 irradiates the light reflecting unit 4 with the modulated light S output from the modulated light output unit 3, and reflects the reflected light (modulated light S) reflected from the light reflecting unit 4 to the eyes of the user of the apparatus. It converges on the lens M3 through the pupil M2 surrounded by the M iris M1, scans on the retina M4, and displays an image on the retina M4.

  Next, the configuration of the modulated light output unit 3 and the light intensity adjusting means 6 will be described. The device 1 is provided for both the left and right eyes. Since the left eye and the right eye have the same configuration, only one of them will be described. As shown in FIG. 3, the modulated light output unit 3 includes an image signal processing unit 8, a red light source 9, a green light source 10, a blue light source 11, a red light source driver 12, a green light source driver 13, and a blue light source driver 14. , Collimating lenses 15, 16 and 17, wavelength selective mirrors 18, 19 and 20, and a focus lens 21. Then, the image signal processing means 8 is based on the image signal P supplied from the external device 7, and the red light source driver 12, the green light source driver 13, and the blue light source that respectively drive the red light source 9, the green light source 10, and the blue light source 11. An intensity modulation signal is output to the driver 14. Light emitted from the red light source 9, the green light source 10, and the blue light source 11 is formed into substantially parallel rays by collimating lenses 15, 16, and 17, and then combined by the wavelength selective mirrors 18, 19, and 20. The focus lens 21 is configured to be incident on the optical fiber 22.

  The intensity of the output of the red light source 9, the green light source 10, and the blue light source 11 is variable. That is, if the power supplied from the red light source driver 12, the green light source driver 13, and the blue light source driver 14 to the red light source 9, the green light source 10, and the blue light source 11 is increased, the emission intensity of the red light source 9, the green light source 10, and the blue light source 11 is increased. On the other hand, if the power supplied from the red light source driver 12, the green light source driver 13, and the blue light source driver 14 to the red light source 9, the green light source 10, and the blue light source 11 is reduced, the red light source 9, the green light source 10, and the blue light source The emission intensity of 11 is reduced.

  The light intensity adjusting means 6 controls the red light source driver 12, the green light source driver 13, and the blue light source driver 14 according to the detection result of the detection unit 23 (shown in FIGS. 1 and 3) that detects external light. . The light intensity adjusting means 6 controls the red light source driver 12, the green light source driver 13, and the blue light source driver 14 in accordance with the intensity of ambient ambient light, that is, the intensity of brightness around the apparatus. For example, as illustrated in FIG. 1, the detection unit 23 is an optical device that is attached to the front surface of the device frame 2 and detects the brightness of the surroundings. The light intensity adjusting means 6 is constituted by a microcomputer, for example, and executes a predetermined operation based on program software stored in a built-in ROM.

  Next, a method in which the light intensity adjusting unit 6 controls the red light source driver 12, the green light source driver 13, and the blue light source driver 14 according to the intensity of external light detected by the detection unit 23 will be described. The light intensity adjusting unit 6 converts the light having the intensity corresponding to the intensity of the external light detected by the detection unit 23 into the red light source 9, the green light source 10, and the blue light source 11 when the external light with the predetermined intensity continues for a predetermined time or longer. The red light source driver 12, the green light source driver 13, and the blue light source driver 14 are controlled so as to emit light. A specific method in which the light intensity adjusting unit 6 controls the red light source driver 12, the green light source driver 13, and the blue light source driver 14 will be described with reference to FIG. In FIG. 2, the vertical axis indicates the intensity K of the external light detected by the detection unit 23, and the horizontal axis indicates the passage of time. In the figure, it is assumed that threshold values a1, a2, a3, a4,... Indicating the intensity K of external light are set. Further, on the horizontal axis, it is assumed that times T1, T2, T3,... For detecting external light are set at intervals of one second. Then, as shown by a solid line in FIG. 2, the intensity K1 of the external light is not less than the threshold value a2 and not more than the threshold value a3 at time T1, but is not more than the threshold value a2 and not more than the threshold value at time T2. In the case of a1 or more, that is, when the intensity of outside light continues for the threshold value a1 or more for one second or more, the light intensity adjusting means 6 is configured such that the red light source 9, the green light source 10, and the blue light source 11 The red light source driver 12, the green light source driver 13, and the blue light source driver 14 are controlled so as to have an intensity corresponding to a1.

  In addition, as shown by the dotted line in FIG. 2, the intensity K2 of the external light is not less than the threshold value a2 and not more than the threshold value a3 at time T1, and is similarly not less than the threshold value a2 at time T2. When the threshold value is a3 or less, that is, when the intensity of the external light continues for more than one second and the threshold value a2 or more, the light intensity adjusting means 6 includes the red light source 9, the green light source 10, and the blue light source 11, The red light source driver 12, the green light source driver 13, and the blue light source driver 14 are controlled so that the intensity corresponds to the threshold value a2.

  Further, as indicated by a one-dot chain line in FIG. 2, the intensity K3 of the external light is not less than the threshold value a2 and not more than the threshold value a3 at the time T1, and is not less than the threshold value a3 and is the threshold value at the time T2. In the case of a4 or less, that is, when the intensity of external light continues for a second or more and the threshold value a3 or more, the light intensity adjusting means 6 is configured to use the red light source 9, the green light source 10, and the blue light source 11 as threshold values. The red light source driver 12, the green light source driver 13, and the blue light source driver 14 are controlled so as to have an intensity corresponding to a3.

  In the above description, when the external light continues a value equal to or greater than a predetermined threshold value for one second or more, the light intensity adjusting means 6 outputs the outputs of the red light source 9, the green light source 10, and the blue light source 11 to the predetermined value. The red light source driver 12, the green light source driver 13, and the blue light source driver 14 are controlled so as to have an intensity corresponding to the threshold value. However, the time for detecting the external light by the detecting unit 23 may be freely changed without being limited to one second as described above.

  Next, the above-described scanning unit 5 will be described. As shown in FIG. 3, the scanning unit 5 includes a horizontal scanning mirror 24, convex lenses 25 and 26, a vertical scanning mirror 27, and convex lenses 28 and 29.

  The horizontal scanning mirror 24 is rotatably provided by a rotating shaft 30. The horizontal scanning mirror 24 reflects the modulated light S in a direction corresponding to the rotational position. The convex lenses 25 and 26 focus the modulated light S reflected by the horizontal scanning mirror 24 on the vertical scanning mirror 27.

  Further, the vertical scanning mirror 27 is provided so as to be swingable about the rotation shaft 31. The vertical scanning mirror 27 reflects the modulated light S that has passed through the convex lens 26 in a direction corresponding to the rotational position of the vertical scanning mirror 27.

  Further, the convex lenses 28 and 29 concentrate the light-modulated light S reflected by the vertical scanning mirror 27 on the retina M4 by concentrating on the lens M3 through the pupil M2 surrounded by the iris M1 of the eye M of the user of the apparatus. The image is displayed on the screen.

  Here, the horizontal scanning mirror 24 is located at the focal position of the convex lens 25, and the vertical scanning mirror 27 is located at the focal position of the convex lenses 26 and 28.

  Next, the above-described light reflecting portion 4 will be described. As shown in FIG. 1, the light reflecting portion 4 has a light reflecting surface 32 that faces the eye M of the user of the apparatus. The light reflecting surface 32 is formed as a spheroid. As shown in FIG. 5, when the ellipse 33 is rotated with the long axis L of the ellipse 33 shown in FIG. Is formed.

  The ellipse 33 shown in FIG. 4 has two focal points M and N. Here, as a general property of the ellipse 33, as shown in FIG. 4, the light emitted from the light source arranged at one focus M and reflected by the ellipse 33 gathers at the other focus N. There is a characteristic. Since the light reflecting surface 32 is formed of a spheroidal surface as described above, as shown in FIG. 6, the light reflecting surface 32 is emitted from one focal point M, and any position of the light reflecting surface 32, for example, FIG. Even light reflected by a, b, c, and d is collected at the other focal point N.

  Accordingly, the scanning unit 5 is attached to the apparatus frame 2 so that the scanning unit 5 that emits the modulated light S is positioned at one focal point M of the ellipse 33 shown in FIG. By forming the device frame 2 so that the eye M of the user of the device is positioned, it is emitted from the scanning unit 5 and reflected at any position on the light reflecting surface 32 as shown in FIG. Even if it is light, it is formed so that it may gather on the eyes M of the user of the apparatus.

  Next, the operation of the retinal scanning display device 1 configured as described above will be described. The device user operates a power switch (not shown) of the retinal scanning display device 1 to operate the retinal scanning display device 1. The light intensity adjusting unit 6 controls the red light source driver 12, the green light source driver 13, and the blue light source driver 14 based on the output of the detection unit 23 that detects the ambient brightness, and the red light source 9, the green light source 10, and the blue light source driver 14. The intensity of light output from the light source 11 is adjusted to be stronger than the surrounding brightness. Accordingly, the device user can clearly see the image displayed on the retina M4 of the eye M of the device user without being disturbed by the surrounding brightness.

  Further, it is assumed that the brightness of the surroundings becomes dark while the device is in use. In this case, the light intensity adjusting means 6 controls the red light source driver 12, the green light source driver 13, and the blue light source driver 14 based on the output of the detection unit 23 that detects ambient brightness, It adjusts so that the intensity | strength of the light output from the green light source 10 and the blue light source 11 may become weak according to surrounding brightness. Thereby, since the electric power given to the red light source 9, the green light source 10, and the blue light source 11 from the red light source driver 12, the green light source driver 13, and the blue light source driver 14 can be reduced, it contributes to energy saving.

  FIG. 7 shows a second embodiment. The feature of the second embodiment is that the light transmittance of the light reflecting portion 41 is variably formed, and the light transmittance can be controlled according to the degree of ambient brightness. . The light reflecting portion 41 of the second embodiment includes a light reflecting surface portion 42 having the same configuration as the light reflecting portion 4 of the first embodiment and a liquid crystal shutter 43 provided on the outer surface of the light reflecting surface portion 42. . In the liquid crystal shutter 43, the magnitude of the light transmittance is controlled by the magnitude of the applied power. If the light transmittance of the liquid crystal shutter 43 increases, a large amount of external light G passes through the liquid crystal shutter 43 and enters the eye M of the user of the apparatus. If the light transmittance of the liquid crystal shutter 43 decreases, The amount of external light G that passes through the liquid crystal shutter 43 and enters the eyes M of the user of the apparatus is reduced.

  The voltage applied to the liquid crystal shutter 43 is controlled by the light transmittance varying means 44. The light transmittance varying means 44 controls the amount of power applied to the liquid crystal shutter 43 in accordance with the level of ambient brightness detected by the detecting unit 23 that detects the intensity of external light, thereby controlling the liquid crystal The light transmittance of the shutter 43 is controlled.

  In the first embodiment, the intensity of the modulated light S is adjusted according to the level of the surrounding brightness by providing the light intensity adjusting means 6 so that the image is clear without being disturbed by the surrounding brightness. In the second embodiment, the light transmittance of the light reflecting portion 41 is made variable and the light transmittance is controlled according to the brightness of the surroundings. 44 was provided. However, the light intensity adjusting unit 6, the light reflecting unit 41 having a variable light transmittance, and the light transmittance varying unit 44 may be provided together in one retinal scanning display device 1.

  Further, the light intensity adjusting means 6 of the first embodiment has a built-in timer, and when the intensity of the brightness of the external light detected by the detection unit 23 is equal to or higher than a predetermined value and continues for a predetermined time or longer, a predetermined brightness is obtained. The intensity of the modulated light S may be adjusted to an intensity corresponding to the intensity. Further, similarly, when the light transmittance varying unit 44 of the second embodiment has a built-in timer and the intensity of the brightness of the external light detected by the detection unit 23 is equal to or higher than a predetermined value and continues for a predetermined time or longer. The light reflecting portion 41 may be adjusted so that the light transmittance corresponding to a predetermined brightness is obtained. In such a configuration, even if the ambient brightness changes momentarily, the configuration does not follow such a momentary change, thus reducing the user's uncomfortable feeling while using this device. be able to.

  Furthermore, the light intensity adjusting means 6 of the first embodiment and the light transmittance varying means 44 of the second embodiment adjust the intensity of the modulated light S according to the brightness of the external light detected by the detecting unit 23. However, the operation unit is provided in the light intensity adjusting unit 6 and the light transmittance varying unit 44, and the device user manually operates the operation unit to adjust the light intensity adjusting unit 6 to obtain modulated light. The intensity of S may be adjusted, or the user may manually adjust the light transmittance variable means 44 to adjust the light transmittance with respect to the external light G.

  FIG. 8 shows a third embodiment. The feature of the third embodiment is that the light transmittance of only the part 51 (shown by a dotted line in the figure) corresponding to the entire visual field or a part of the light reflecting portion 41 of the second embodiment is changed. There is a point I did. In this case, if the voltage is uniformly applied to the entire liquid crystal shutter 43 of the second embodiment, the light transmittance of the liquid crystal shutter 43 can be changed uniformly. Further, if the power applied to the liquid crystal shutter 43 can be applied differently for each part of the liquid crystal shutter 43, the light transmittance of the liquid crystal shutter 43 is partially changed, for example, corresponding to the image display area. The light transmittance of the portion to be changed can be changed to achieve the above-described effect. Further, only the image area portion is made non-transmissive by the liquid crystal shutter and the other portions are made transparent so that the overlap between the image area and the real image can be eliminated, and the sense of incongruity with the real image can be eliminated.

It is an external view of a retina scanning display apparatus. (First embodiment) It is explanatory drawing explaining the effect | action which adjusts the intensity | strength of a light source corresponding to the temporal change of external light. (First embodiment) It is a circuit block diagram of a retina scanning display apparatus. (First embodiment) It is explanatory drawing for forming the rotation ellipsoid which comprises a light reflection part. (First embodiment) It is explanatory drawing for forming the rotation ellipsoid which comprises a light reflection part. (First embodiment) In a light reflection part, it is a front view of the light reflection part for demonstrating reflection of light. (First embodiment) It is a block diagram explaining the structure of a retina scanning display apparatus. (Second Embodiment) It is a front view of a light reflection part. (Third embodiment) It is an external view which shows a part of external appearance of the retinal scanning display apparatus of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Retina scanning display apparatus 3 Modulated light output part 4 Light reflection part 5 Scanning part 6 Light intensity adjustment means 23 Detection part 41 Light reflection part 44 Light transmittance variable means

Claims (16)

A modulated light output unit that outputs light as modulated light modulated according to image information, a light reflecting unit having light transparency, and the modulated light is irradiated to the modulated light unit, and the light reflecting unit A retinal scanning display device comprising a scanning unit that scans the retina light on the retina and displays an image on the retina,
A retinal scanning display device comprising light intensity adjusting means for adjusting the intensity of the modulated light.   2. The detection unit according to claim 1, further comprising a detection unit configured to detect brightness of the outside world, wherein the light intensity adjustment unit adjusts the intensity of the modulated light according to the brightness of the outside world detected by the detection unit. The retinal scanning display device described.   The retinal scanning display device according to claim 2, wherein the light intensity adjusting unit increases the intensity of the modulated light when the brightness of the external environment detected by the detection unit becomes brighter.   The light intensity adjusting means adjusts the intensity of the modulated light in accordance with the predetermined intensity when the brightness of the external environment detected by the detection unit continues for a predetermined time with a predetermined intensity or higher. The retinal scanning display device according to claim 2 or 3.   2. The retinal scanning display apparatus according to claim 1, further comprising a manually operable operation unit, wherein the light intensity adjusting unit adjusts the intensity of the modulated light in response to a manual operation on the operation unit.   6. The retinal scanning display device according to claim 1, further comprising a light transmittance varying unit that changes a light transmittance of the light reflecting portion.   The retinal scanning display apparatus according to claim 6, wherein the light transmittance varying unit changes the light transmittance of a portion corresponding to the entire visual field of the eye in the light reflecting portion.   The retinal scanning display apparatus according to claim 6, wherein the light transmittance varying unit changes a light transmittance of a portion corresponding to a part of a visual field of the eye in the light reflecting portion.   7. The apparatus according to claim 6, further comprising: a detecting unit that detects brightness of the outside world, wherein the light transmittance varying unit reduces the light transmittance when the brightness of the outside world detected by the detecting unit exceeds a predetermined level. Item 9. The retinal scanning display device according to any one of items 8. A modulated light output unit that outputs light as modulated light modulated according to image information, a light reflecting unit having light transparency, and the modulated light is irradiated to the modulated light unit, and the light reflecting unit A retinal scanning display device comprising a scanning unit that scans the retina light on the retina and displays an image on the retina,
A retinal scanning display device comprising light transmittance varying means for changing the light transmittance of the light reflecting section.   The retinal scanning display apparatus according to claim 10, wherein the light transmittance varying unit changes a light transmittance of a portion corresponding to the entire visual field of the eye among the light reflecting portions.   The retinal scanning display apparatus according to claim 10, wherein the light transmittance varying unit changes a light transmittance of a portion corresponding to a part of a visual field of the eye in the light reflecting portion.   11. The apparatus according to claim 10, further comprising a detection unit that detects brightness of the outside world, wherein the light transmittance varying unit adjusts the light transmittance according to the brightness of the outside world detected by the detection unit. Item 13. The retinal scanning display device according to any one of items 12.   14. The retinal scanning display device according to claim 13, wherein the light transmittance varying means reduces the light transmittance when the brightness of the outside world detected by the detection unit becomes brighter.   The light transmittance varying means adjusts the light transmittance in accordance with the predetermined intensity when the brightness of the outside world detected by the detection unit continues for a predetermined time with a predetermined intensity or higher. The retinal scanning display device according to claim 13 or 14. The retinal scanning display apparatus according to claim 10, further comprising a manually operable operation unit, wherein the light transmittance varying unit adjusts the light transmittance in response to a manual operation on the operation unit.

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