JP2010237308A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress degradation in image quality which occurs due to color shift in a display image when image light subjected to pupil expansion by diffraction grating 17 is projected on the eyes 12 of a user and the image is thereby displayed. <P>SOLUTION: The image display device includes: an image display part 2 for visualizing a display image by projecting image light which has been subjected to the pupil expansion, to the eyes 12 of a user; a mounting part 3 that is mounted on the head of a user and holds the image display part 2 in front of the eyes 12 of the user; and a positioning part 4 that is disposed between the image display part 2 and the mounting part 3 and positions the exit pupils by moving the image display part 2 backward or forward with respect to the mounting part 3 in front of the eyes of the user. A determination image for positioning is projected from the image display part 2, and the positions of the exit pupils are adjusted by the positioning part 4 according to the viewing state of the determination image. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an image display device, and more particularly to an image display device that displays an image by introducing image light that has been subjected to pupil enlargement processing into a user's eyes.

  In recent years, a head-mounted display device that puts a display device on a user's head, irradiates image light directly on the user's eyes, and forms a display image on the retina for display is put into practical use. ing. Since it does not take up the place of a display apparatus and can expand | deploy an image | video in front of eyes, utilization is examined in various fields.

  FIG. 9 is a block diagram showing a configuration of a retinal scanning type image display device which is an example of this type of display device (FIG. 1 of Patent Document 1). The operation of the retinal scanning image display apparatus will be briefly described below. A video signal input from the outside is input to the signal processing circuit 60. The signal processing circuit 60 extracts a synchronization signal and luminance signals of respective colors of R (red), G (green), and B (blue) from the video signal. The R, G, and B color laser drivers 70, 72, and 74 receive the R, G, and B color signals and generate drive signals for each of the R, G, and B colors. The RGB lights emitted by the R, G, and B lasers 135, 137, and 139 are combined via the collimator lenses 40, 42, 44, the dichroic mirrors 50, 52, 54, and the coupling optical system 56, and are combined into an optical fiber 82. be introduced. The combined light emitted from the optical fiber 82 is emitted to the optical scanning unit via the collimator lens 84, the beam splitter 92, and the like.

  The optical scanning unit includes a horizontal scanning system 100 that scans the combined light emitted from the optical fiber 82 in the horizontal direction and a vertical scanning system 120 that scans in the vertical direction. The scanning light scanned by the optical scanning unit is introduced into the pupil 146 of the user's eye 145 via the relay optical system 140 and forms an image on the retina 147. The user recognizes the image formed on the retina as a display image.

  FIG. 10 shows a simplified optical path of the retinal scanning image display device of FIG. 9 (FIG. 6 of Patent Document 1). Between the horizontal scanning system 100 and the vertical scanning system 120, a first relay optical system 112, a diffraction grating 116, and a second optical system 114 are installed. The scanning light from the vertical scanning system 120 is projected onto the user's eye 145 via the second relay optical systems 142 and 144. Here, the diffraction grating 116 is provided to enlarge the exit pupil diameter projected from the second relay optical system 144, and is a position where the scanning light from the horizontal scanning system 100 forms an intermediate image by forming an image. Is installed.

JP 2006-251126 A

FIG. 11 is a schematic diagram showing scanning light projected from the main body 200 of the retinal scanning type image display apparatus to the user's eye 145. FIG. 11A shows a state where the user's eyes are facing the front, and FIG. 11B shows a state where the user's eyes are facing the upper end portion of the display image. In FIG. 11A, image light is projected from the main body 200 onto the pupil Pi of the user's eye 145 with a predetermined angle of view θ. In FIG. 11 (a), the image light G _{+ theta / 2} of the outer peripheral portion of the image to be projected, the image light G _o of the central portion, the image light G _{+ theta / 2} image light G of the outer peripheral portion opposite to the _{- θ / 2} is drawn. Each image light G _{+ θ / 2} , G _o , G _{−θ / 2} converges on the exit pupil Pd of the image display device and is introduced into the eye 145 through the user's pupil Pi. Each image light _{G + θ / 2, G o} , G -θ / 2 includes _a zero-order diffracted light _D 0, + 1-order diffracted light _{D +1} and -1 order diffracted light _{D -1} by the diffraction grating 116 (not shown), the exit pupil The diameter of Pd is enlarged. Further, the position of the exit pupil Pd of the image apparatus is made to substantially coincide with the position of the user's pupil Pi. Accordingly, when the eye 145 of the user is facing the front, the entire image light _{G + θ / 2, G o} , since _{G - [theta] / 2} is introduced into the eye 145, the entire image is visible.

  Usually, the field angle θ of the image light is set to 20 ° to 35 °, for example, the field angle θ = 25 °. However, the eyes 145 can finely recognize the image of the outside world, and the pyramidal cells on the retina that are sensitive to color are concentrated in an angle range of 2 ° to 3 ° at most when viewed from the center of the retina. For this reason, when the user tries to look closely at the projected display image, the eyeball 150 is frequently rotated.

FIG. 11B shows a state where the user is gazing at the outer periphery of the image. Since the eye 145 faces the image light G _{+ θ / 2} in front, the pupil Pi also faces the image light G _{+ θ / 2} side. In this case, the image light _{G + θ / 2, G o} , since each part of the G _{- [theta] / 2} is introduced into the eye 145 through the pupil Pi, once the entire image is visible. However, the image light _{G + θ / 2, G o} , ± 1 -order diffracted light _D +1 included in s husband _{G -θ / 2, D -1,} the color shift caused by the wavelength dependence of the diffraction angle occurs. Therefore, if the ratios of the 0th-order diffracted light D ₀ and the ± 1st-order diffracted lights D ₊₁ and D ₋₁ of the image light introduced into the eye 145 are different, color unevenness is recognized. As shown in FIG. 11B, when the eye 145 gazes at the direction of the image light G _{+ θ / 2} at the outer peripheral edge, the eye 145 will see the + 1st order diffracted light D _{+ 1} peripheral region of the image light G _{+ θ / 2} as a center, Color misregistration will be recognized remarkably.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an image display device in which color misregistration can be suppressed within an allowable limit even when the outer periphery of image light is watched, and an image formed by image light is not chipped. It is to be.

  In the present invention, the following means have been taken in order to solve the above problems.

  In the invention according to claim 1, the image light subjected to the pupil enlargement process by the diffraction element is projected onto the user's eye, and the display is made visible, and the image display unit is attached to the user's head, A mounting unit that holds the image display unit in front of the user's eyes, and the image display unit and the mounting unit. The image display unit is positioned before and after the user's eyes with respect to the mounting unit. A position adjustment unit that moves in a direction to adjust the position of the exit pupil by the image light, and the image display unit projects image light for determination for adjusting the position of the exit pupil. The image display device enables the position adjustment of the exit pupil by the position adjustment unit in accordance with the visual recognition state of the determination image based on the image light for determination.

  In the invention which concerns on Claim 2, the said image display part inputs the said image data from the determination image memory | storage part which memorize | stores the image data for projecting the said determination image, and the said determination image storage part, The said image A projection unit that projects image light for determination according to data, a light diffraction unit that applies a pupil expansion process to the projected image light by the diffraction element, and an image light that has been subjected to the pupil expansion process And an eyepiece lens unit that projects toward the eyes.

  In the invention according to claim 3, the determination image includes a peripheral determination pattern displayed in a peripheral portion of the display image.

  In the invention according to claim 4, the peripheral determination pattern is formed of a color determination pattern having an angle of view in a range of 2 ° to 3 °.

  In the invention according to claim 5, the determination image includes a color comparison pattern that is displayed in the center of the display image and is compared with the color that appears in the color determination pattern.

  In the invention according to claim 6, the peripheral determination pattern includes a peripheral edge pattern for displaying a peripheral edge of the display image.

  In the invention which concerns on Claim 7, the said position adjustment part enabled the position of the front-back direction of the said image display part to be able to move to the step shape of a predetermined space | interval.

  In the invention which concerns on Claim 8, the said image display part memorize | stores the past position of the position detection part which detects the position of the said image display part with respect to the said mounting part, and the said image display part which the said position detection part detected. The current position of the image display unit detected by the position detection unit and the past position stored in the position storage unit, and the current position is a predetermined distance or more from the past position And a position comparison unit for detecting a warning on the image display unit.

  In the invention which concerns on Claim 9, in the position adjustment method of the image display apparatus of any one of the said Claims 1-8, the said edge part which the said image display part displays on the periphery edge part of a display image A first projection step of projecting a first determination image consisting of a pattern, and the image display unit up to a position where the peripheral edge pattern starts to be chipped in a state in which the outermost peripheral edge of the outer peripheral edge pattern is watched. A first moving step of bringing the eye close to the eye direction, and the image display unit projects a second determination image having a color determination pattern in a peripheral portion of the display image and a color comparison pattern in a central portion of the display image A second projecting step, and a second moving step for moving the image display unit in a direction opposite to the user's eye to a position where a color appearing in the color determination pattern and a color appearing in the color comparison pattern approximate. And the position adjusting method for an image display device characterized by having.

  In the invention according to claim 10, in the second projection step, the color comparison pattern includes a color sample pattern representing a color sample and a color limit pattern representing a color limit, and the second moving step includes the color determination. The image display unit is fixed by moving a predetermined distance in the direction of the user's eyes from the position where the color appearing in the pattern approximates the color appearing in the color limit pattern.

  In the invention according to claim 11, the first projection step to the second movement step are performed when the image display device is activated.

  In the invention which concerns on Claim 12, in the drive method of the image display apparatus of any one of the said Claims 1-8, the said image display part is a periphery edge part pattern which displays the periphery edge part of a display image. First image data for displaying a first determination image having a second determination image for displaying a second determination image having a color determination pattern in the periphery of the display image and a color comparison pattern in the center of the display image A determination image storage unit that stores two image data, a projection unit that inputs the image data from the determination image storage unit and projects image light for determination, and position adjustment of the image display unit in the position adjustment unit A first projection step of inputting the first image data from the determination image storage unit and projecting image light based on the image data. When, A first input step in which the movement of the image display unit to the first position is input to the operation input unit; and the projection unit inputs the second image data from the determination image storage unit. An image having: a second projection step of projecting image light based on the image data; and a second input step in which the operation input unit inputs that the image display unit has been moved to the second position. A display device driving method was adopted.

  In the invention according to claim 13, the first projection step to the second input step are performed when the image display device is activated.

  In the invention according to claim 14, the image display device includes a position detection unit that detects a position of the image display unit with respect to the mounting unit, a position storage unit that stores the detected position, and a position comparison unit. The second input step further includes a step of detecting the second position by the position detection unit and storing the second position in the position storage unit, and the position comparison unit is detected by the position detection unit. The current position of the image display unit is compared with the second position stored in the position storage unit, and it is detected that the current position is separated from the second position by a predetermined distance or more. And a warning display step for displaying a warning on the image display unit.

  In the image display device according to the present invention, the image light subjected to the pupil enlargement process by the diffraction element is projected onto the user's eyes, and the image display unit for visually recognizing the display image is attached to the user's head, The image display unit is configured between a mounting unit that holds the image display unit in front of the user's eyes and the image display unit and the mounting unit. The image display unit is moved in the front-rear direction of the user's eyes with respect to the mounting unit. A position adjustment unit that can adjust the position of the exit pupil by the image light, and the image display unit projects image light for determination for adjusting the position of the exit pupil, and the image light for the determination The position of the exit pupil can be adjusted by the position adjustment unit in accordance with the visual recognition state of the determination image based thereon. As a result, the color shift when the user gazes at the periphery of the display image is suppressed within the allowable limit, and the display image of the other periphery is missing while the periphery is being watched. The position of the image display unit can be adjusted so that there is no problem.

It is a schematic diagram for demonstrating the structure of the image display apparatus which concerns on embodiment of this invention. It is a block diagram for demonstrating the function of the image display part which concerns on embodiment of this invention. It is a figure for demonstrating the principle of positioning of the image display apparatus which concerns on embodiment of this invention. It is a schematic diagram for demonstrating the structure of the image display apparatus which concerns on embodiment of this invention. 1 is a block diagram schematically illustrating an image display device according to an embodiment of the present invention. It is a flowchart for demonstrating the position adjustment method and drive method of the image display apparatus which concern on embodiment of this invention. It is a figure showing an example of the judgment picture concerning the embodiment of the present invention. It is a flowchart for demonstrating the position adjustment method and drive method of the image display apparatus which concern on embodiment of this invention. It is a block diagram showing the structure of a conventionally well-known retinal scanning type image display apparatus. It is a schematic diagram showing the optical path of a conventionally well-known retinal scanning type image display apparatus. It is a schematic diagram showing the state by which scanning light is projected on an eye from a retina scanning type image display apparatus.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic diagram for explaining a configuration of an image display apparatus 1 according to an embodiment of the present invention. In the following description, the same reference numerals are given to the same parts or parts representing the same functions.

  FIG. 1A is a perspective view of the image display device 1 according to the first embodiment of the present invention. The image display device 1 is mounted on an image display unit 2 that projects image light, which has been subjected to pupil enlargement processing by a diffraction element, onto the user's eyes, and is held on the user's head and held in front of the user's eyes. The image display unit 2 is configured to be movable in the front-rear direction of the user's eyes with respect to the mounting unit 3 and is projected from the image display unit. The position adjustment unit 4 enables adjustment of the position of the exit pupil by the image light.

  As will be described in detail later, the image display unit 2 includes a main body 14 and a half mirror 11 that guides image light projected from the main body 14 toward the eyes of the user. The mounting portion 3 is composed of a glasses-type frame, and includes a front frame 5 and left and right temples 6 connected to the front frame 5 so as to be opened and closed. A position adjusting unit 4 is formed on the left frame 6 on the front frame 5 side. The position adjustment unit 4 includes a columnar body 7 formed on the front frame 5 side of the temple 6 and a frame body 8 fixed to the side surface of the main body 14. A through hole is formed in the frame body 8, and a columnar body 7 is inserted into the through hole, and the columnar body 7 holds the frame body 8 so as to be movable in the front-rear direction. Accordingly, the position of the exit pupil can be adjusted by moving the image display unit 2 back and forth with respect to the mounting unit 3.

  FIG. 1B is an exploded perspective view of the frame body 8 and the stopper 9 installed on the side surface of the casing constituting the main body 14. The frame body 8 is separated into a front frame body 8 a and a rear frame body 8 b, and is fixed with a gap provided on the side surface of the main body 14. The stopper 9 has an L-shape that falls down when viewed from the side, and a through hole is formed in the long portion of the L-shape, and a step is formed in the short portion of the L-shape. The stopper 9 has an L-shaped long portion inserted into the gap between the front and rear frames 8a and 8b, and an L-shaped short portion exposed at the upper side of the rear frame 8b. The step portion at the tip of the L-shaped short part is fixed to the upper surface end of the rear frame 8b with screws. The stopper 9 is formed of an elastic member, and when the upper portion is pressed downward with a finger, the L-shaped longitudinal portion moves downward, and when the finger is released, the stopper 9 returns to its original position.

  FIG. 1C is a schematic longitudinal sectional view of the position adjusting unit 4 in the longitudinal direction. The columnar body 7 has a quadrangular cross section, and V-shaped grooves 10 are formed on the bottom surface at predetermined intervals. The columnar body 7 is inserted into the through holes of the rear frame body 8b, the stopper 9, and the front frame body 8a. The lower portion 9 b of the stopper 9 has a protrusion on the columnar body 7 side, and this protrusion engages with the groove 10 of the columnar body 7 to fix the position of the image display unit 2. The engagement is released by pressing the upper part 9a of the stopper 9 downward, and the image display unit 2 can move back and forth. Further, the image display unit 2 can be moved in the front-rear direction step by step in the groove 10 by pulling the image display unit 2 forward or pushing it backward.

  In addition, the said mounting part 3 and the position adjustment part 4 show one Embodiment of this invention, and are not limited to this structure. The mounting unit 3 may be a goggle type instead of the spectacles type frame, and the position adjusting unit 4 is formed with a concave or convex portion on the temple 6, and a sliding portion that meshes with the concave or convex portion on the side surface of the image display unit 2. May be formed so as to be movable in the front-rear direction, or a clip-like holding part may be formed on the side surface of the image display unit 2 to hold the temple 6 so as to be movable in the front-rear direction. In short, it is only necessary that the image display unit 2 is held in the mounting unit 3 so as to be movable in the front-rear direction of the user's eyes and the position of the exit pupil of the image light projected from the image display unit 2 can be adjusted.

  FIG. 2 is a block diagram for explaining the function of the image display unit 2. As shown in FIG. 2, the image display unit 2 includes a projection unit 16 that projects image light based on the input image signal S, a diffraction grating 17 that performs pupil enlargement processing that diffracts image light from the projection unit 16, and The eyepiece 18 that projects the image light subjected to the pupil enlargement process to the user's eye 12, the determination image storage unit 19 that stores the determination image for adjusting the position of the image display unit 2, and the control of the apparatus The control part 15 to perform is provided.

  The control unit 15 executes various functions by reading the processing program stored in the ROM 21 into the RAM 22 and executing it. The control unit 15 inputs an image signal S from the outside via the image signal input I / F 40, develops pixel data constituting the image, stores the data in the VRAM 23, and sequentially stores pixels from the VRAM 23 in synchronization with the horizontal synchronization signal. Data is read out and output to the image signal supply circuit 25.

  The projection unit 16 receives the image signal S, converts it into image light, and projects it. The image signal supply circuit 25 inputs the image signal S and outputs a luminance signal of each color of RGB. The R laser driver 26R, the G laser driver 26G, and the B laser driver 26B input RGB luminance signals, generate RGB image signals, and supply them to the R laser 27R, the G laser 27G, and the B laser 27B. Each of the lasers 27R, 27G, and 27B emits RGB laser light having emission intensity corresponding to the luminance signal. The RGB laser beams are mixed through a collimator lens 28, a dichroic mirror 29, and a coupling optical system 30, and introduced into an optical fiber 31.

  The mixed color laser light guided by the optical fiber 31 is collimated by the collimator lens 32 and is irradiated on the swing reflection surface of the horizontal light scanner 34. The horizontal light scanner 34 receives a drive signal from the horizontal drive circuit 33 to which a horizontal synchronization signal is input, and scans the collimated laser light in the horizontal direction. The laser beam scanned in the horizontal direction is guided by the relay lens 35 to the swing reflection surface of the vertical light scanner 37. The vertical light scanner 37 inputs a drive signal from the vertical drive circuit 36 to which the vertical synchronization signal is input, and scans the laser beam scanned in the horizontal direction in the vertical direction. The scanning light scanned in the horizontal direction and the vertical direction is incident on the diffraction surface of the diffraction grating 17 by the relay optical system 38.

  The diffraction grating 17 is installed at a position where an intermediate image is formed. The diffraction grating 17 diffracts the incident image light and performs a pupil diameter enlargement process including 0th-order diffracted light and ± 1st-order diffracted light. The eyepiece 18 introduces the image light that has been subjected to the pupil enlargement process from the diffraction grating 17 to the user's eyes, and forms a display image. The position of the exit pupil EP of the projected image light is adjusted on the side of the retina 13 with respect to the user's pupil Pi, and the image light of the entire display image is introduced into the user's eye 12 and color shift is allowed. Reduce within limits.

  The determination image storage unit 19 stores image data of a determination image for adjusting the position of the image display unit 2. In the position adjustment, a determination image is displayed based on the image data read from the determination image storage unit 19, and the position adjustment unit 4 is operated according to the visual recognition state of the determination image, so that the exit pupil EP of the image display unit 2 is adjusted. Adjust the position back and forth.

  The stored determination image includes a peripheral determination pattern displayed in the peripheral portion of the display image and a color comparison pattern displayed in the central portion of the display image. The peripheral determination pattern is a pattern that is displayed in the peripheral portion of the display image, and includes a peripheral end pattern that displays the peripheral end portion, and a color determination pattern that has a size of an angle of view in the range of 2 ° to 3 °. Including. The peripheral edge pattern is a pattern for specifying the position of the image display unit 2 that starts to be seen with the peripheral edge pattern missing, with the outermost peripheral edge of the outer peripheral edge pattern being watched. The color determination pattern is a pattern for determining a color shift when the peripheral portion of the display image is watched. The color comparison pattern is used for positioning the image display unit 2 in which the color shift in the peripheral portion is within the allowable limit compared to the color appearing in the color determination pattern.

  Thus, by displaying the peripheral determination pattern, the user's eyes 12 can be easily directed to the peripheral portion, and the lack of the display image in the peripheral portion can be easily found. In addition, by setting the angle of view of the color determination pattern in the range of 2 ° to 3 °, image light can be projected only on the pituitary cell region sensitive to the color on the retina. Identification accuracy can be improved, and deterioration in image quality due to color misregistration can be reliably prevented. In addition, since the color comparison pattern is displayed at the center of the display image, it is easy to compare with the color appearing in the color determination pattern on the outer peripheral portion, and the color determination accuracy can be improved.

  In the above-described embodiment, the projection unit 16 is an optical scanning type in which laser light is two-dimensionally scanned using an optical scanner, but the present invention is not limited to this. DMD (Digital Mirror Device) or a liquid crystal display element can be used as the projection unit 16. The image light projected from the DMD or the liquid crystal display element may be subjected to pupil expansion processing by the diffraction grating 17 to display an image.

  FIG. 3 is a view for explaining the principle of positioning of the image display device 1 of the present invention. 3A shows a case where the exit pupil EP of the image light projected from the image display unit 2 matches the position of the user's pupil Pi, and FIG. 3B shows the exit pupil of the image light. EP is located between the pupil Pi of the user and the rotation center of the eyeball, and FIG. 3C shows a case where the exit pupil EP of the image light coincides with the rotation center of the user's eyeball. The left side of each figure shows a state in which image light is projected from the image display unit 2 to the user's eye 12, and the right side of each figure is a judgment image read out and projected from the judgment image storage unit 19. 48 shows a state visible to the user. A peripheral edge pattern 41 is displayed on the outer periphery of the determination image 48, and a color determination pattern 42 is displayed on the upper right corner.

In FIG. 3A, when the user is facing the front, the exit pupil EP of the image light and the pupil Pi of the user substantially coincide. As a result, all of the image light _{G + θ / 2, G -θ} / 2 and the image light G _o of the display center portion of the display peripheral portion is directed into the eye of the user. Therefore, the ratio between the _0th-order diffracted light D0 and the ± 1st-order diffracted lights D _{+ 1} and D- ₁ included in each image light does not shift, and no color shift occurs. In addition, since the image light G _{+ θ / 2} and G _{−θ / 2} from the display outer peripheral portion are introduced into the eyeball, the peripheral portion of the display image can be visually recognized.

Next, the user gazes at the color determination pattern 42 displayed at the peripheral edge. Since the color determination pattern 42 is located at the peripheral edge of the display image, the user rotates the eyeball and looks at the image light G _{+ θ / 2} in front. Then, the user's pupil Pi is greatly displaced in the eyeball rotation direction with respect to the exit pupil EP of the image light, and the −1st order diffracted light D ₋ included in each of the image light G _{+ θ / 2} , _{Go , and} G _{−θ / 2. 1} does not enter the eyeball. Then, the upper edge portion of the + 1st order diffracted light D ₊ 1 included in the image light G _{+ θ / 2} from the display outer peripheral portion is viewed in front.

The wavelength of the image light at the upper edge of the ₊ 1st order diffracted light D _{+ 1} is shifted to the red side. For this reason, the white color determination pattern 42 projected from the image display unit 2 appears to the user in a reddish color. In addition, the pupils Pi users, some of the image light G _{- [theta] / 2} of the zero-order diffracted light D _0, and + 1st-order diffracted light D _{+ 1} is incident on the eye to be incident from the outer peripheral portion of the lower side of the display image The Therefore, as shown in the determination image 48 on the right side, the user can see the entire periphery of the peripheral edge pattern 41.

FIG. 3B shows a state in which the image display unit 2 is moved in the direction of the user's eye 12, and the exit pupil EP of the image light is located between the user's pupil Pi and the rotation center of the eyeball. . When the eye 12 of the user is facing the front, all of the image light G ₀ incident from the front is led into the eye of the user. Therefore, no color misregistration occurs.

Next, the user gazes at the color determination pattern 42 displayed at the peripheral edge. Since the color determination pattern 42 is located at the outermost peripheral edge of the determination image 48, the user rotates the eyeball and looks at the image light G _{+ θ / 2} in front. In this case, since the exit pupil EP of the image light is moved toward the rotation center side of the eyeball, the user's pupil Pi does not greatly shift in the eyeball rotation direction with respect to the exit pupil EP of the image light. Therefore, image light G _{+ theta / 2} from the outer peripheral portion, all the + 1-order diffracted light _{D +1} 0-order diffracted light _{D 0,} almost all of the -1-order diffracted light _{D -1} is incident on the eyeball. As a result, as shown in the determination image 48 on the right side, the color appearing in the color determination pattern 42 becomes lighter than in the case of FIG. 3A, and the color shift is reduced.

FIG. 3C shows a state in which the exit pupil EP of the image light projected by the image display unit 2 is moved to the position of the rotation center of the user's eyeball. In this case, even when the view area of the determination image 48 throat, 0-order contained in the image light diffracted lights D ₀ and ± 1-order diffracted light D ₊₁ incident from looking _direction, D _-1 is introduced into the eye. Therefore, even when the color determination pattern 42 displayed at the peripheral edge of the determination image 48 is watched, no color shift occurs. However, as the exit pupil EP of the image light moves in the direction of the user's retina 13, the image light D _{−θ / 2} that enters from the diagonal direction of the peripheral edge that is gazing enters the user's pupil Pi. It becomes difficult. As a result, as shown in the determination image 48 on the right side of FIG. 3C, the peripheral edge pattern 41 in the direction of the image light G− _{θ / 2} appears to be missing. If a defect occurs in an area other than the area being watched, an unnatural image appears.

  Therefore, the optimal position of the image display unit 2 with respect to the user's eyes 12 is that the peripheral edge pattern 41 is not chipped when the user gazes at the outermost peripheral portion of the display image. The color shift of the color appearing on the outer peripheral portion is within the allowable limit. Accordingly, a determination image including the peripheral edge pattern 41 and the color determination pattern 42 is displayed, and while watching the color determination pattern 42 displayed on the peripheral edge, the position until the peripheral edge pattern 41 appears to be missing is displayed. After the image display unit 2 is moved, it is moved and fixed in the opposite direction to a position where the color of the color determination pattern 42 can maintain the allowable limit.

  This makes it possible to display a high-quality image without causing any other area to be seen no matter which part of the display image is observed, even if the color shift is within the allowable limit in any area of the display image. Can do.

(Second embodiment)
FIG. 4 is a schematic diagram for explaining the configuration of the image display apparatus 1 according to the second embodiment of the present invention. FIG. 5 is a functional block diagram for explaining functions of the image display apparatus 1 according to the second embodiment. The difference from the first embodiment is that a position detection element for detecting the current position of the image display unit 2 is provided in the position adjustment unit 4 configured between the image display unit 2 and the mounting unit 3 and is determined once. This is a point in which the position information of the determined position is stored in the storage unit. This will be specifically described below.

  FIG. 4A is a perspective view of the image display device 1 according to the second embodiment of the present invention. The image display device 1 includes an image display unit 2 that projects image light toward the user's eyes, a mounting unit 3 that holds the image display unit 2 and is mounted and fixed to the user's head. A position adjusting unit 4 is provided that enables the image display unit 2 to move back and forth with respect to the direction of the user's eyes.

  FIG. 4B shows a longitudinal sectional view of the temple 6 in the longitudinal direction. The position adjustment unit 4 is a columnar body 7 having a quadrangular cross section formed on the front frame 5 side of the temple 6 and a frame in which the columnar body 7 is inserted in the center portion on the side surface on the temple 6 side of the image display unit 2. It is composed of a body 8.

  The frame body 8 is separated into a front frame body 8 a and a rear frame body 8 b, and is fixed with a gap provided on the side surface of the main body 14. The stopper 9 has an L-shape that falls down when viewed from the side, and a through hole is formed in the long portion of the L-shape, and a step is formed in the short portion of the L-shape. The stopper 9 has an L-shaped long portion inserted into the gap between the front and rear frames 8a and 8b, and an L-shaped short portion exposed on the upper surface of the rear frame 8b and fixed with screws. The stopper 9 is formed of an elastic member, and when the upper portion is pressed downward with a finger, the L-shaped longitudinal portion moves downward, and when the finger is released, the stopper 9 returns to its original position.

  The columnar body 7 includes a support 50 from the lower side, a resistance layer 51 attached to the upper surface of the support body 50, and a protective body 52 installed thereon. The protection body 52 is opened along the longitudinal direction of the temple 6 so that a part of the surface of the resistance layer 51 is exposed. A plurality of grooves 10 are formed at predetermined intervals on the bottom surface of the support 50. The lower part of the stopper 9 abuts so as to press the bottom surface of the columnar body 7 and engages with a groove 10 formed on the bottom surface of the columnar body 7. By pressing the upper end of the stopper 9, the engagement is released, and the image display unit 2 can move back and forth.

  Further, a brush 53 that is in contact with the surface of the resistance layer 51 is provided at the lower part of the upper side of the frame 8 a and is in electrical contact with the resistance layer 51. The brush 53 and the resistance layer 51 constitute a position detection element. The brush 53 is connected to the image display unit 2 through a wiring (not shown). The end portion of the resistance layer 51 is connected to the image display unit 2 via a wiring (not shown). When the image display unit 2 is moved in the front-rear direction with respect to the mounting unit 3, the frame 8 moves with respect to the columnar body 7, and this movement moves the position of the brush 53 with respect to the resistance layer 51. The resistance value between the ends of 51 changes. That is, the position of the image display unit 2 can be detected by detecting the resistance value with the position detection unit.

  FIG. 5 is a block diagram schematically showing the configuration of the image display device 1 according to the second embodiment of the present invention. The image display device 1 includes an image display unit 2, a mounting unit 3 (not shown), and a position adjusting unit 4 (not shown) configured between the image display unit 2 and the mounting unit 3.

  The image display unit 2 projects a projection unit 16 that projects image light, a diffraction grating 17 that performs pupil expansion processing of the projected image light, and image light that has undergone pupil expansion processing onto the user's eye 12. Eyepiece 18 for use, a half mirror 11 (not shown) that reflects image light from the eyepiece 18 to the eye 12, a determination image storage unit 19 that stores a determination image, an operation input unit 39 that is input by a user, It can be said that a control unit 15 for controlling the image display device 1 and a position detection unit 45 for detecting a resistance value between the brush 53 formed on the position adjustment unit 4 and the end of the resistance layer 51 can be said.

  The image display unit 2 further includes a position storage unit 46 that stores position information related to the position of the image display unit 2 detected by the position detection unit 45, and a position detected in the past and a current detection stored in the position storage unit 46. A position comparison unit 47 that compares the current position with the current position, determines that the current position is separated from the past position by a predetermined distance or more, and causes the projection unit 16 to project image light representing a warning display. Yes. Therefore, when the user wears the image display device 1 on the head and views the displayed image, the position correction of the image display unit 2 is performed on the mounting unit 3 only when the position correction warning is displayed. Just do it. Therefore, the user does not need to be aware of color misregistration during normal use.

  In the present embodiment, the resistance value of the resistance layer 51 is detected and the position of the image display unit 2 with respect to the mounting unit 3 is detected. However, the present invention is not limited to this. For example, even if the columnar body 7 is provided with a light emitting element, the frame 8 is provided with a light receiving element, and the position of the image display unit 2 relative to the mounting unit 3 is detected based on the position of the light receiving element that receives light emitted from the light emitting element. Alternatively, other position detection methods may be used.

  Further, in the first embodiment and the second embodiment, the position of the image display unit 2 with respect to the mounting unit 3 is moved by manual operation. Instead, an electric mechanism such as a stepping motor is incorporated in the position adjustment unit 4. Thus, the position of the mounting portion 3 may be electrically controlled.

(Third embodiment)
FIG. 6 is a flowchart for explaining a position adjusting method and a driving method of the image display apparatus 1 according to the third embodiment of the present invention.

  The user operates the operation input unit 39 of the image display device 1 to activate it. The CPU 20 of the control unit 15 reads out the main processing program from the ROM 21, develops it in the RAM 22, and executes the main processing program. When it is determined that the current activation is the first activation (Yes in Step S1), the control unit 15 activates the pupil position setting mode (Step S4). When determining that the current activation is not the first activation (No in step S1), the control unit 15 projects a determination screen for determining whether or not to perform position adjustment from the projection unit 16 to the user's eye 12 (step S2). . When the control unit 15 detects that the user has input that the position adjustment is performed from the operation input unit 39 (Yes in Step S2), the control unit 15 activates the pupil position setting mode in Step S4. When the control unit 15 detects that an input indicating that the position adjustment is not performed within a predetermined period or that an input indicating that the position adjustment is not performed is input from the operation input unit 39 (No in step S2). Then, the image / video display mode is activated (step S3). When the image / video display mode is activated, the image signal S input via the image signal input I / F 40 is output to the image signal supply circuit 25 of the projection unit 16 to perform normal display of images and videos.

  When the pupil position setting mode is activated, the control unit 15 reads the first image data from the determination image storage unit 19 and supplies the first image data to the projection unit 16, and the projection unit 16 projects and displays the first determination image (step S5). . This is called the first projection step.

  FIG. 7A shows the first determination image. The first determination image includes a peripheral edge pattern 41 displayed on the peripheral edge of the display image and a color displayed on the outermost periphery of the display image and having a field angle in the range of 2 ° to 3 °. A determination pattern 42 is included. The background of the first determination image is painted black using black image data. The peripheral edge pattern 41 and the color determination pattern 42 are displayed using white image data. In the lower part of the color determination pattern 42, an instruction sentence “Please pay attention to the circle and move the main body to the eye side until the entire frame can be seen” is displayed.

  At this time, the user operates the position adjustment unit 4 while gazing at the color determination pattern 42 displayed on the outermost peripheral portion, and displays a part of the peripheral end pattern 41, for example, on the diagonal of the color determination pattern 42. The image display unit 2 is brought close to the direction of the user's eye 12 until the peripheral edge pattern 41 is missing (step S6).

  Next, the user operates the position adjustment unit 4 to move the image display unit 2 one step further away from the user's eyes 12 (step S7). When the user looks at the color determination pattern 42 displayed on the outermost peripheral portion and sees all of the peripheral edge pattern 41 (Yes in step S8), the user operates the operation input unit 39 to display the image. The display unit 2 inputs that the movement to the first position is completed and the first movement step is completed (step S9). This operation is called a first input step. When detecting the completion of the first input step from the operation input unit 39, the control unit 15 reads the second image data from the determination image storage unit 19 and outputs the second image data to the projection unit 16, and the projection unit 16 outputs the second determination image. Is projected and displayed (step S10). This is called a second projection step.

  FIG. 7B shows a second determination image. The second determination image includes a color determination pattern 42 displayed on the outermost peripheral portion of the display screen, a color limit pattern 43 and a color sample pattern 44 displayed on the center portion of the display image. The color limit pattern 43 is formed by image data displaying a color limit, and indicates the limit of color misregistration. That is, if the color that appears in the color determination pattern 42 is of the level that appears in the color limit pattern 43, it means that the color shift in the outermost peripheral area of the display screen is in an acceptable range. When it becomes darker than the color of the limit pattern 43, it means that the color deviation exceeds the allowable range and the image quality is lowered. The color sample pattern 44 is for facilitating comparison with the color appearing in the color determination pattern 42. In the lower part of the color limit pattern 43 and the color sample pattern 44, “Compare the color of the circle at the left edge of the screen with the two circles at the center. If it is close to the left circle, please move the body away from your eyes. "

When the image display unit 2 is moved in a direction away from the eye 12, the color determination pattern 42 changes from white to a reddish color. As described with reference to FIG. 3, the user's pupil Pi is displaced from the exit pupil EP of the image light, and the −1st order diffracted light D ₋₁ included in the image light G _{+ θ / 2} is not incident on the eyeball. Since the upper edge portion of the + 1st order diffracted light D ₊ 1 included in the image light G _{+ θ / 2} is viewed in front, the wavelength of the color determination pattern 42 is shifted to the red side.

  The user compares the color appearing in the color determination pattern 42 with the color displayed in the color limit pattern 43 while keeping a close eye on the color determination pattern 42 (step S11). When the user determines that the color appearing in the color determination pattern 42 has not reached the color displayed in the color limit pattern 43 (No in step S12), the user operates the position adjustment unit 4 to display the image display unit 2. Is moved 1 step further to the user's eye 12 (step S13), and the color determination pattern 42 is watched. This operation is repeated until the color appearing in the color determination pattern 42 is close to the color displayed in the color limit pattern 43.

  When the user determines that the color appearing in the color determination pattern 42 is close to the color displayed in the color limit pattern 43 (Yes in step S12), the user operates the position adjustment unit 4 to move the image display unit 2 to the eye 12. 1 step in a direction close to (step S14). The user operates the operation input unit 39 to input that the image display unit 2 has been moved to the second position and the second moving step has been completed (step S15). This operation is called a second input step. The control unit 15 detects the completion of the second input step from the operation input unit 39, and ends the pupil position setting mode.

  In the second projection step, the color sample pattern 44 is displayed side by side with the color limit pattern 43 as the second determination image, but the color sample pattern 44 may be omitted. In addition, after determining that the color appearing in the color determination pattern 42 is close to the color displayed in the color limit pattern 43, the image display unit 2 is moved backward toward the first step eye 12 in step S 14. If the color to be displayed is within the allowable limit, the backward step S13 can be omitted. Further, although white image data is used as the color of the color determination pattern 42, the present invention is not limited to this, and image data of other colors can be used. In this case, the display color of the color limit pattern 43 is image data of an allowable limit color in which the wavelength is shifted from the display color of the color determination pattern 42 to the red side.

(Fourth embodiment)
FIG. 8 is a flowchart showing a position adjusting method and a driving method of the image display apparatus 1 according to the fourth embodiment of the present invention. The fourth embodiment is a position adjustment method and a driving method of the image display device 1 having the configuration of the second embodiment.

  The user scans and starts the operation input unit 39 of the image display device 1. When it is determined that the current activation is the first activation (Yes in Step S1), the control unit 15 activates the pupil position setting mode (Step S4 in the third embodiment). Hereinafter, steps S4 to S15 are the same as those in the third embodiment, and thus description thereof is omitted. When the control unit 15 determines that the current activation is not the first activation (No in Step S1), the position detection unit 45 detects the position of the image display unit 2 (Step S16).

  The position comparison unit 47 reads the position information indicating the current position of the image display unit 2 from the position detection unit 45 and the position information indicating the past position from the position storage unit 46, and calculates the difference (step S17). When the position comparison unit 47 determines that the difference is within a predetermined value range that is within the allowable limit of color misregistration (Yes in step S18), it is not necessary to perform pupil position setting, so an image / video display is performed. The mode is activated (step S3), and normal operation is performed. When the position comparison unit 47 determines that the difference is not within the range of the predetermined value (No in step S18), the position comparison unit 47 supplies the projection display unit 16 with the warning display image data via the control unit 15, and the image display unit 2 Image light indicating that position adjustment is necessary is projected onto the user's eye 12 to alert the user (step S19).

  Next, the control unit 15 projects a screen for determining whether or not to perform position adjustment from the projection unit 16 onto the user's eye 12 (step S2). When the control unit 15 detects that the user has input from the operation input unit 39 to perform position adjustment (Yes in step S2), the control unit 15 activates the pupil position setting mode in step S4. When the control unit 15 detects that the position adjustment is not input within the predetermined period or that the position input is not performed from the operation input unit 39 (No in step S2), the control unit 15 The video display mode is activated (step S3). When the image / video display mode is activated, the image signal S input via the image signal input I / F 40 is output to the image signal supply circuit 25 of the projection unit 16 to perform normal display of images and videos.

  After the pupil position setting mode is activated (step S4 in the third embodiment) and the completion of the second movement step is input (step S15 in the third embodiment), the position detection unit 45 is connected to the image display unit 2 The current position is detected and position information is generated, and the control unit 15 stores the position information of the current position in the position storage unit 46 (step S20). This stored position information becomes position information representing a past position on the image display unit 2. Thereafter, the pupil position setting mode is terminated.

  As a result, when the current position of the image display unit 2 is within an allowable limit that causes a positional shift, it is not necessary to perform pupil position setting, and the user is not required to perform position adjustment.

  Although the present invention has been described through the above-described embodiments, the following effects can be achieved according to the present embodiment.

  (1) An image display device according to the present invention projects an image light, which has been subjected to pupil enlargement processing by a diffraction element, onto a user's eye to visually recognize a display image, and a user's head. A mounting unit that is mounted and holds the image display unit in front of the user's eyes, and is configured between the image display unit and the mounting unit, and the image display unit is positioned in the front-rear direction of the user's eyes with respect to the mounting unit. A position adjusting unit that moves and adjusts the position of the exit pupil by the image light, and the image display unit projects image light for determination for adjusting the position of the exit pupil, and the image for determination The position adjustment unit can adjust the position of the exit pupil according to the visual recognition state of the determination image based on light.

  Further, as the position adjustment method of the image display device 1, a first projection step in which the image display unit projects a first determination image composed of a peripheral edge pattern displayed on the peripheral edge of the display image, and an outer peripheral edge pattern The first movement step of bringing the image display unit close to the direction of the user's eyes until the position where the peripheral edge pattern starts to be chipped in a state where the outermost peripheral edge of the image is observed, and the image display unit To a position where the color appearing in the color judgment pattern and the color appearing in the color comparison pattern approximate to the second projection step of projecting the second judgment image having the color judgment pattern and the color comparison pattern in the center of the display image And a second moving step for moving the image display unit in a direction opposite to the user's eyes.

  Further, as a driving method of the image display device, the image display unit includes first image data for displaying a first determination image having a peripheral edge pattern for displaying a peripheral edge portion of the display image, and the periphery of the display image. A determination image storage unit for storing second image data for displaying a second determination image having a color determination pattern at the center and a color comparison pattern at the center of the display image, and inputting image data from the determination image storage unit A projection unit that projects image light for determination, and an operation input unit that inputs that the position of the image display unit has been adjusted in the position adjustment unit. A first projection step for inputting image data and projecting image light based on the image data; and a first input step for inputting that the image display unit has been moved to the first position to the operation input unit; The projection part The second projection step of inputting the second image data from the image storage unit and projecting the image light based on the image data, and the operation input unit are input that the image display unit has been moved to the second position. A second input step.

  As a result, the color shift when the user gazes at the periphery of the display image is suppressed within the allowable limit, and the display image of the other periphery is missing while the periphery is being watched. The position of the image display unit can be adjusted so that there is no problem.

  (2) The image display unit inputs a determination image storage unit that stores image data for projecting a determination image and image data from the determination image storage unit, and projects image light for determination according to the image data A projection unit, a light diffractive unit that applies a pupil enlargement process to the projected image light using a diffraction element, and an eyepiece unit that projects the image light subjected to the pupil enlargement process toward the user's eyes. It was decided that Accordingly, the determination image can be easily read, and the configuration of the image light pupil enlargement processing unit can be simplified.

  (3) The determination image includes a peripheral determination pattern displayed in the peripheral portion of the display image. Thereby, since the peripheral part of a display image can be looked at easily, a user's eyeball can be turned to an outer peripheral part.

  (4) The peripheral determination pattern is made up of a color determination pattern having an angle of view in the range of 2 ° to 3 °. As a result, the color determination pattern 42 is projected only on the area of the user's retina where cells sensitive to color concentrate, so that the color identification accuracy of the user is improved and the image quality is reduced due to color misregistration. It can be prevented with accuracy.

  (5) The determination image is displayed at the center of the display image and includes a color comparison pattern for comparison with the color appearing in the color determination pattern. Accordingly, the color determination pattern displayed on the outer peripheral portion and the color comparison pattern displayed on the central portion can be easily compared by moving the line of sight, so that the color determination accuracy can be improved. Further, since the color comparison pattern is set at the center of the display screen, it can be displayed in a state where no color shift occurs due to the set color image data.

  (6) The peripheral determination pattern includes a peripheral edge pattern that displays the peripheral edge of the display image. Thereby, it is possible to easily confirm the lack of the image at the peripheral edge.

  (7) The position adjustment unit can move the position of the image display unit in the front-rear direction in a stepped manner at a predetermined interval. Thereby, since positioning of the image display part 2 can be moved back and forth reliably, alignment can be performed in a short time.

  (8) The image display unit is detected by the position detection unit that detects the position of the image display unit with respect to the mounting unit, the position storage unit that stores the past position of the image display unit detected by the position detection unit, and the position detection unit. The current position of the image display unit is compared with the past position stored in the position storage unit, and it is detected that the current position is separated from the past position by a predetermined distance or more. And a position comparison unit for displaying a warning.

  The image display device further includes a position detection unit that detects the position of the image display unit with respect to the mounting unit, a position storage unit that stores the detected position, and a position comparison unit, and the second input step includes position detection A step of detecting a second position by the unit and storing the second position in the position storage unit. The position comparison unit further includes a current position of the image display unit detected by the position detection unit and a second position stored in the position storage unit. And a warning display step for detecting that the current position is separated from the second position by a predetermined distance or more and displaying a warning on the image display unit.

  As a result, when the current position of the image display unit is within an allowable limit for causing a positional shift, there is no need to perform pupil position setting, and the user is not required to perform position adjustment. Have.

  (9) In the second projection step, the color comparison pattern includes a color sample pattern representing a color sample and a color limit pattern representing a color limit, and the second moving step appears in the color and color limit pattern appearing in the color determination pattern. The image display unit is fixed by moving a predetermined distance in the direction of the user's eye rather than the position where the color approximates. Thereby, since the image display unit is moved by a predetermined distance in the direction of the user's eyes, the color misregistration can be reduced within the color misregistration limit, so that a high-quality image can be displayed. In addition, since both the color limit pattern and the color sample pattern are included in the color comparison pattern, color matching can be performed with higher accuracy.

  (10) The first projection step to the second movement step are performed when the image display device is activated. Thereby, since the position setting process of the image display unit is performed at the time of activation, it is possible to reliably prevent the user from continuing to view the low-quality display image having a color shift without noticing.

DESCRIPTION OF SYMBOLS 1 Image display apparatus 2 Image display part 3 Mounting part 4 Position adjustment part 5 Front frame 6 Temple 7 Columnar body 8 Frame body 9 Stopper 10 Groove 11 Half mirror

Claims (14)

An image display unit for projecting image light that has been subjected to pupil enlargement processing by a diffraction element to a user's eye and visually recognizing a display image;
A mounting unit mounted on a user's head and holding the image display unit in front of the user's eyes;
It is configured between the image display unit and the mounting unit, and the position of the exit pupil by the image light can be adjusted by moving the image display unit in the front-rear direction of the user's eyes with respect to the mounting unit. A position adjusting unit that
The image display unit projects image light for determination for adjusting the position of the exit pupil, and the position adjustment unit projects the exit pupil according to the visual recognition state of the determination image based on the image light for determination. An image display device that enables position adjustment.   The image display unit stores a determination image storage unit that stores image data for projecting the determination image, and inputs the image data from the determination image storage unit, and image light for determination according to the image data. A projection unit for projecting the image, a light diffraction unit for subjecting the projected image light to pupil expansion processing by the diffraction element, and an eyepiece for projecting the image light subjected to the pupil expansion processing toward the user's eyes And an image display device according to claim 1.   The image display device according to claim 1, wherein the determination image includes a peripheral determination pattern displayed in a peripheral portion of the display image.   The image display apparatus according to claim 3, wherein the peripheral determination pattern is a color determination pattern having a size of an angle of view ranging from 2 ° to 3 °.   The image display device according to claim 4, wherein the determination image includes a color comparison pattern that is displayed in a center portion of the display image and is compared with a color that appears in the color determination pattern.   The image display device according to claim 3, wherein the peripheral determination pattern includes a peripheral edge pattern that displays a peripheral edge of a display image.   The image display device according to claim 1, wherein the position adjustment unit is capable of moving the position of the image display unit in the front-rear direction in a step-like manner at a predetermined interval. The image display unit
A position detection unit for detecting the position of the image display unit with respect to the mounting unit;
A position storage unit that stores a past position of the image display unit detected by the position detection unit;
The current position of the image display unit detected by the position detection unit is compared with the past position stored in the position storage unit, and the current position is separated from the past position by a predetermined distance or more. The image display apparatus according to claim 1, further comprising: a position comparison unit that detects a warning and displays a warning on the image display unit. In the position adjustment method of the image display device according to any one of claims 1 to 8,
A first projection step of projecting a first determination image composed of a peripheral edge pattern displayed on the peripheral edge of the display image by the image display unit;
A first moving step of bringing the image display unit close to the direction of the user's eyes until a position at which the peripheral edge pattern starts to be chipped in a state in which the outermost peripheral edge of the outer peripheral edge pattern is watched,
A second projection step in which the image display unit projects a second determination image having a color determination pattern in a peripheral portion of the display image and a color comparison pattern in a central portion of the display image;
A second moving step of moving the image display unit in a direction opposite to the user's eyes to a position where the color appearing in the color determination pattern and the color appearing in the color comparison pattern approximate. A method for adjusting the position of an image display device. In the second projection step, the color comparison pattern includes a color sample pattern representing a color sample and a color limit pattern representing a color limit,
In the second movement step, the image display unit is moved by a predetermined distance in the direction of the user's eyes, and fixed, from a position where the color appearing in the color determination pattern and the color appearing in the color limit pattern approximate. The position adjustment method of the image display apparatus according to claim 9.   The position adjustment method according to claim 9 or 10, wherein the first projection step to the second movement step are performed when the image display device is activated. In the driving method of the image display device according to any one of claims 1 to 8,
The image display unit
First image data for displaying a first determination image having a peripheral edge pattern for displaying a peripheral edge of the display image, a color determination pattern in the peripheral part of the display image, and a color comparison pattern in the central part of the display image A determination image storage unit that stores second image data for displaying a second determination image, and a projection unit that inputs the image data from the determination image storage unit and projects image light for determination. An operation input unit for inputting that the position adjustment of the image display unit has been performed in the position adjustment unit,
A first projection step in which the projection unit inputs the first image data from the determination image storage unit and projects image light based on the image data;
A first input step in which the operation input unit inputs that the image display unit has been moved to the first position;
A second projection step in which the projection unit inputs the second image data from the determination image storage unit and projects image light based on the image data;
And a second input step in which the operation input unit inputs that the image display unit has been moved to the second position.   13. The method of driving an image display device according to claim 12, wherein the first projection step to the second input step are performed when the image display device is activated. The image display device further includes a position detection unit that detects a position of the image display unit with respect to the mounting unit, a position storage unit that stores the detected position, and a position comparison unit.
The second input step includes a step of detecting the second position by the position detection unit and storing the second position in the position storage unit,
Further, the position comparison unit compares the current position of the image display unit detected by the position detection unit with the second position stored in the position storage unit, and the current position is the second position. The method for driving an image display device according to claim 12 or 13, further comprising a warning display step of detecting that the position is separated from the position by a predetermined distance or more and displaying a warning on the image display unit. .

Images