JP2010232718A - Head-mounted image display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head-mounted image display apparatus that is easily adjusted such that any image can be observed in an effective screen size within a visual field range by an observation optical unit in a mounted posture desired by an observer. <P>SOLUTION: The head-mounted image display apparatus includes an ocular optical unit 26 and a display element 23 for displaying images, and allows image light of the image displayed by the display element 23 to go into an eyeball 30 through the ocular optical unit 26. The display element 23 includes a display region adjustment means that includes a displayable screen size 23a larger than a screen size corresponding to an effective screen size 35 that can be observed within the visual field range 26a by the ocular optical unit 26, and controls an address of a display region 35a corresponding to the effective screen size 35 of the display element 23 for adjusting the display region 35a by controlling an address of the display region 35a corresponding to the effective screen size 35 in the display element 23 by the display region adjustment means such that the image of the effective screen size 35 can be observed within the visual field range 26a by the ocular optical unit 26. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a head-mounted image display device.

  As a conventional head-mounted image display device, for example, a device that can be mounted by a mobile device such as a headset type or a spectacles-mounted type has been proposed (for example, see Patent Documents 1 and 2).

  FIG. 22 is a diagram showing a schematic configuration of a conventionally proposed headset-type head mounted image display device, where (a) is a front view, (b) is a side view, and (c) is a plan view. . This head-mounted image display device 100 is of the left eye type, and is a headset-type head support unit 101 held in the left ear of the observer M, and the head support unit 101 has a relay unit 102 and a holding unit. And a light guide unit 104 that is connected via the unit 103 and is held in the left eye visual field of the observer M. The light guide unit 104 includes an eyepiece optical unit 105 provided at an end opposite to the holding unit 103 side. The head support unit 101, the relay unit 102, or the holding unit 103 incorporates a display element (not shown) such as a liquid crystal display element or an organic EL element that displays an image to be observed. The image light of the displayed image is emitted from the eyepiece optical unit 105 through the light guide unit 104.

  The head-mounted image display apparatus 100 illustrated in FIG. 22 moves the head support unit 101 to the left of the observer M so that the image light emitted from the eyepiece optical unit 105 enters the left eye pupil of the observer M. An enlarged virtual image of an image displayed on a display element (not shown) can be observed by holding it in the ear and looking into the eyepiece optical unit 105 in that state. In addition, this structure may be made into a right eye type by comprising right-and-left reverse.

  FIG. 23 is a perspective view showing a schematic configuration of a head-mounted image display device of eyeglass-mounted type that has been conventionally proposed. This head-mounted image display device 110 is a right-eye type integrated with spectacles, and includes a video display unit 112 supported by a spectacle frame 111 and an observation optical unit 113 held by the video display unit 112. Have. The observation optical unit 113 includes a light guide unit 114 and an eyepiece optical unit 115, and is held by the video display unit 112 in the vicinity of the front of the right eyeglass lens 116 in the right eye field of the observer. . The video display unit 112 incorporates a display element (not shown) such as a liquid crystal display element or an organic EL element that displays an image to be observed, and image light of the image displayed on the display element is observed. The light enters the optical unit 113, passes through the light guide unit 114, and exits from the eyepiece optical unit 115.

  In the head-mounted image display device 110 shown in FIG. 23, the image light emitted from the eyepiece optical unit 115 enters the right eye pupil through the eyeglass lens 114 when the observer puts on the eyeglass frame 111. ing. Therefore, the observer can observe an enlarged virtual image of an image displayed on a display element (not shown) by wearing the eyeglass frame 111 and looking through the eyepiece optical unit 115.

  Note that as a head-mounted image display device of a spectacle-mounted type, a device that can be attached to and detached from normal spectacles and used in the same manner as in FIG. 23, a video display unit equipped with a display element, a light guide unit, A spectacle-integrated type or a separate type is also proposed in which an observation optical unit having an eyepiece optical unit is separated.

Japanese translation of PCT publication No. 2003-502713 JP 2006-3879 A

  By the way, the head size of the observer has individual differences in the head width, the pupil distance, the distance from the ear to the eyeball, and the like. For this reason, depending on the orientation of the head-mounted image display device, depending on the observer, when the line of sight is directed toward the eyepiece optical unit, the deviation between the visual axis of the corresponding eyeball and the optical axis of the observation optical unit increases. Thus, vignetting may occur in the image light from the display element, and the entire screen of the display element may not be observed.

  FIG. 24 is a diagram for explaining the observation state of the display screen of the display element according to the mounting posture of the conventional head-mounted image display device. 24A to 24C are schematic diagrams illustrating image light when the image displayed on the display element 121 is observed with the eyeball 124 through the light guide unit 122 and the eyepiece optical unit 123 by the ray reverse tracking method. It is. FIGS. 24D to 24F are diagrams showing the observation modes of the display screen 121a of the display element 121 in the visual field range 123a by the eyepiece optical unit 123 corresponding to FIGS. 24A to 24C. In FIGS. 24D to 24F, the visual field range 123a by the eyepiece optical unit 123 is circular due to the pupil shape. The display element 121 has a display screen 121a having a screen size corresponding to a predetermined effective screen size that can be observed in the visual field range 123a by the eyepiece optical unit 123.

  As shown in FIG. 24A, in an appropriate mounting posture in which the visual axis of the eyeball 124 and the optical axis of the eyepiece optical unit 123 coincide with each other, vignetting does not occur in the image light. As shown, the entire display screen 121 a of the display element 121 is displayed in the visual field range 123 a by the eyepiece optical unit 123.

  On the other hand, when the mounting posture is shifted as shown in FIG. 24B with respect to the visual axis of the eyeball 124, the optical axis of the eyepiece optical unit 123 is displayed in the visual field range 123a by the eyepiece optical unit 123. As shown in FIG. 24E, the display screen 121a of the display element 121 is displaced downward, for example, so that vignetting occurs in the image light in the lower part of the display screen 121a, and the image of that part cannot be observed. Similarly, as shown in FIG. 24C, the optical axis of the eyepiece optical unit 123 is shifted in the direction opposite to the case of FIG. Since the display screen 121a of the display element 121 displayed in the visual field range 123a by the eyepiece optical unit 123 is shifted upward, for example, as shown in FIG. 24F, vignetting occurs in the image light in the upper part of the display screen 121a. As a result, the image of that portion cannot be observed.

  As a countermeasure in the observation state as shown in FIG. 24 (e) or FIG. 24 (f), as shown in FIG. 24 (d), the visual field range 123a depends on the type of the head-mounted image display device. The display screen 121a is displayed on the screen, that is, as shown in FIG. 24A, the wearing posture is appropriately adjusted so that the visual axis of the eyeball 124 matches the optical axis of the eyepiece optical unit 123. It may be possible to readjust.

  However, the readjustment operation may be troublesome depending on the type of the head-mounted image display device. In addition, since the observer's head dimensions are different from person to person as described above, there may be cases where it cannot be adjusted to a physically appropriate mounting posture, or conversely, if the observer is adjusted to a proper mounting posture, depending on the observer, There is a concern that inconveniences such as annoying itself may occur.

  Accordingly, an object of the present invention made in view of the above point is to provide a head-mounted image that can be easily adjusted so that an image can be observed with an effective screen size in the visual field range by the observation optical unit in a desired mounting posture of the observer. It is to provide a display device.

The invention of the head-mounted image display device according to claim 1 that achieves the above object includes an eyepiece optical unit disposed in the field of view of one eyeball of the observer while being attached to the head of the observer. A head-mounted image display device having a display element for displaying an image, and causing image light of the image displayed on the display element to enter the eyeball of the observer through the eyepiece optical unit In
The display element has a displayable screen size larger than a screen size corresponding to a predetermined effective screen size that can be observed in a visual field range by the eyepiece optical unit,
A display area adjusting means for controlling an address of a display area corresponding to the effective screen size in the display element;
The display area is adjusted by controlling the display area address corresponding to the effective screen size in the display element by the display area adjusting means so that the image of the effective screen size can be observed in the visual field range by the eyepiece optical unit. It is characterized by being able to be configured.

The invention according to claim 2 is the head-mounted image display device according to claim 1,
The length of the diagonal line of the displayable screen size is P, the focal length of the eyepiece optical unit on the display element side is f, the diameter of the pupil of the eyeball is d, the distance from the pupil to the eyepiece optical unit is W, When the length of the diagonal line of the eyepiece optical unit is D,
P / 2 / f> d / 2 / W, P / 2 / f> D / 2 / W
It is characterized by having comprised so that.

The invention according to claim 3 is the head-mounted image display device according to claim 1 or 2,
A light guide part for guiding image light from the display element to the eyepiece optical part, and a projection cross section in an observer's visual axis direction at least at a light guide tip part of the light guide part including the eyepiece optical part; Is less than 4 mm, which is smaller than the diameter of the pupil of the eyeball.

The invention according to claim 4 is the head-mounted image display device according to claim 3,
The light guide unit has a width of a projection cross section in the visual axis direction of an observer from an incident end side where image light is incident from the display element to an emission end side where the image light is emitted to the eyepiece optical unit. It has a tapered shape that becomes smaller toward the surface.

The invention according to claim 5 is the head-mounted image display device according to any one of claims 1 to 4,
The display area adjusting means includes
An adjustment image memory for storing image data of an adjustment image including display position information on the display element;
An input unit for inputting desired display position information of the image for adjustment displayed on the display element;
A display control unit that controls an address of a display area corresponding to the effective screen size in the display element, based on the display position information input from the input unit;
It is characterized by having.

The invention according to claim 6 is the head-mounted image display device according to any one of claims 1 to 4,
The display area adjusting means includes
An adjustment image memory for storing image data of an adjustment image having a screen size corresponding to the effective screen size;
An input unit for inputting display position movement information of the adjustment image displayed on the display element;
A display control unit that moves the display position of the adjustment image on the display element based on the display position movement information input from the input unit;
It is characterized by having.

The invention according to claim 7 is the head-mounted image display device according to any one of claims 1 to 4,
The display area adjusting means includes
An input unit for inputting display position movement information of an input image having a screen size corresponding to the effective screen size displayed on the display element;
A display control unit that moves the display position of the input image on the display element based on the display position movement information input from the input unit;
It is characterized by having.

  According to the present invention, the displayable screen size of the display element is made larger than the screen size corresponding to the effective screen size that can be observed in the visual field range by the eyepiece optical unit, and the display area adjusting means controls the display area address Thus, the display area of the effective screen size is electrically adjusted, so that the observer can observe the image of the effective screen size while keeping the head-mounted image display device in a desired wearing posture suitable for him / her. Easy adjustment is possible.

It is a schematic perspective view which shows the structure of the principal part of the head mounted image display apparatus which concerns on 1st Embodiment of this invention. It is a schematic plan view which shows the structure of the principal part of the head mounted image display apparatus shown in FIG. It is a figure which shows the relationship between the width of the projection cross section to the observer's visual axis direction of the observation optical part shown in FIG. 1, and a pupil diameter. It is a figure for demonstrating the observation state of the display screen of a display element by the mounting attitude | position of the head mounted image display apparatus shown in FIG. It is a figure for demonstrating the adjustment method of the display area corresponded to the effective screen size on the display element shown in FIG. It is a figure which shows the relationship between the display element in the head mounted image display apparatus shown in FIG. 1, and an effective screen size. It is a block diagram which shows the circuit structure of the principal part of the head mounted image display apparatus shown in FIG. It is a figure which shows the image for adjustment stored in the image memory for adjustment shown in FIG. It is a flowchart explaining the operation | movement of the adjustment mode by the head mounted image display apparatus which concerns on 1st Embodiment. It is a figure which shows the display mode of the image for adjustment by step S13 shown in FIG. It is a figure for demonstrating the process in step S15 shown in FIG. It is a figure which shows the image for position adjustment used with the head mounted image display apparatus which concerns on 2nd Embodiment of this invention. It is a flowchart explaining operation | movement of the adjustment mode by the head mounted image display apparatus which concerns on 2nd Embodiment. It is a figure for demonstrating the process in step S28 shown in FIG. It is a figure which shows the image for position adjustment used with the head mounted image display apparatus which concerns on 3rd Embodiment of this invention. It is a flowchart explaining operation | movement of the adjustment mode by the head mounted image display apparatus which concerns on 3rd Embodiment. It is a figure which shows the display position of the image for fine adjustment moved and adjusted by step S37 shown in FIG. It is a flowchart explaining operation | movement of the adjustment mode by the head mounted image display apparatus which concerns on 4th Embodiment of this invention. It is a figure which shows the display position of the image for adjustment adjusted by movement by step S44 shown in FIG. It is a flowchart which shows the outline | summary of operation | movement of the head mounted image display apparatus which concerns on 5th Embodiment of this invention. It is a schematic diagram for demonstrating the modification of the head mounted image display apparatus which concerns on this invention. It is a figure which shows schematic structure of the headset type head mounted image display apparatus proposed conventionally. It is a perspective view which shows schematic structure of the spectacles type head mounted image display apparatus proposed conventionally. It is a figure for demonstrating the observation state of the display screen of the display element by the mounting attitude | position of the conventional head mounted image display apparatus.

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

(First embodiment)
1 and 2 are a schematic perspective view and a schematic plan view showing a configuration of a main part of the head-mounted image display device according to the first embodiment of the present invention. The head-mounted image display device 20 is a right-eye type that can be detachably attached to the glasses 10, and includes a video display unit 21 and an observation optical unit 22 separated from the video display unit 21. The video display unit 21 is equipped with a display element 23 such as a liquid crystal display element or an organic EL element that displays an image to be observed, and a peripheral circuit for displaying an image on the display element 23. The video display unit 21 is fixed to the temple 11R on the right side of the glasses 10 via the attachment unit 24, and emits image light of an image displayed on the display element 23 forward from the window unit 21a, thereby observing optics. The light is incident on the portion 22.

  The observation optical unit 22 includes a light guide unit 25 and an eyepiece optical unit 26 made of plastic or glass. The observation optical unit 22 is held by the right eye lens 12R via a clip-type holder 27. Also, the observation optical unit 22 is connected to a hinge 14R that rotatably connects the armor (R) 13R on the right side of the glasses 10 and the temple 11R via an arm 28 attached to a holder 27 via a screw 15R. Supported. Then, the image light emitted from the window portion 21a of the video display unit 21 is incident from one end side of the light guide unit 25, reflected multiple times in the light guide unit 25, and emitted from the other end side, The image light emitted from the light guide unit 25 passes through the eyepiece optical unit 26 and is emitted toward the observer's eyeball (in this case, the right eyeball) 30 as shown in FIG. Thereby, the observer can observe the enlarged virtual image of the image displayed on the display element 23 of the video display unit 21 by directing his / her line of sight toward the eyepiece optical unit 26.

  In the present embodiment, the displayable screen size of the display element 23 is set larger than the screen size corresponding to the effective screen size that can be observed in the visual field range of the eyepiece optical unit 26. Further, the light guide unit 25 is configured so that image light having a displayable screen size from the display element 23 can be incident thereon. Then, the display area corresponding to the effective screen size in the display element 23 can be electrically adjusted so that the observer can observe an image of the effective screen size.

  Further, the width of the projection cross section of the observation optical unit 22 including the light guide unit 25 and the eyepiece optical unit 26 in the visual axis direction of the observer is smaller than the diameter of the pupil 30a of the eyeball 30, as shown in FIG. For example, it is set to 4 mm or less, which is smaller than the average pupil diameter. Thereby, the light guide part 25 and the observation optical part 26 become see-through so that the outside world can be seen. In the present embodiment, the light guide section 25 has a tapered shape in which the width of the projected cross section in the visual axis direction of the observer decreases from the incident end side to the exit end side of the image light. Thus, by making it taper shape, the eyepiece optical part 26 can be made thinner and the see-through effect can be enhanced. Further, even when the eyeball 30 and the optical axis of the eyepiece optical unit 26 are misaligned, there is an advantage that vignetting due to the entrance opening is less likely to occur due to the thick incident end of the light guide unit 25. Furthermore, since a larger display element 23 can be arranged in accordance with the incident part opening of the light guide part 25, the display position movement range can be increased and the adjustable range of the observer can be increased.

  As described above, if the displayable screen size of the display element 23 is made larger than the screen size corresponding to the effective screen size observable by the eyepiece optical unit 26, for example, as shown in FIG. Even if the optical axis of the eye optical unit 26 is deviated from the visual axis of the eyeball 30 to some extent, the visual field range of the eyepiece optical unit 26 is within the displayable screen size 23a of the display element 23 as shown in FIG. A display area corresponding to a predetermined effective screen size 35 by 26a can be located. 4A is a schematic diagram showing image light when the image displayed on the display element 23 is observed with the eyeball 30 through the light guide unit 25 and the eyepiece optical unit 26 by the ray reverse tracking method. .

  Therefore, the displayable screen size of the display element 23 according to the relative positional relationship between the displayable screen size 23a of the display element 23 and the effective screen size 35 based on the visual field range 26a of the eyepiece optical unit 26 based on the mounting posture of the apparatus. If the display area 35a corresponding to the effective screen size 35 is moved and adjusted as shown in FIG. 5 by controlling the address at which the image is displayed within the image 23a, the observer observes the image having the predetermined effective screen size 35. It becomes possible to do.

  Here, the displayable screen size 23a of the display element 23 is preferably configured to satisfy the following conditions. That is, as schematically shown in FIG. 6, the length of the diagonal line of the displayable screen size 23a in the display element 23 is P, the focal length on the display element 23 side of the eyepiece optical unit 26 is f, and the pupil 30a of the eyeball 30 is When the diameter is d, the distance (eye relief) from the pupil 30a to the eyepiece optical unit 26 is W, and the length of the diagonal line of the eyepiece optical unit 26 is D, P / 2 / f> d / 2 / W, P / 2 / f> D / 2 / W is satisfied.

  FIG. 7 is a block diagram showing a circuit configuration of a main part of the head-mounted image display device 20 according to the present embodiment. The head-mounted image display device 20 according to the present embodiment includes a display image memory 41 for storing image data of an image to be displayed on the display element 23, and an image display area having an effective screen size to be displayed on the display element 23. Display area memory 42 for storing address information for setting the image, a control unit 43 for controlling the overall operation including display control of the image on the display element 23, and an adjustment image including display position information on the display element 23 An adjustment image memory 44 for storing the image data, and an input unit 45 capable of inputting an operation mode, desired display position information of the adjustment image displayed on the display element 23, and the like.

  FIG. 8 is a diagram showing an adjustment image stored in the adjustment image memory 44 shown in FIG. The adjustment image 51 divides an area corresponding to the entire displayable screen size 23a of the display element 23 into a matrix in the horizontal (X) direction and the vertical (Y) direction, and each divided area (hereinafter referred to as a cell). The display position information (coordinates, symbols, images, etc.) of the cell is recorded. Here, as the display position information of each cell, coordinates indicating the position in the X direction in the upper column of each cell and the position in the Y direction in the lower column are recorded.

  The head-mounted image display device 20 according to the present embodiment adjusts the normal mode for displaying a desired input image and the display area 35a corresponding to the effective screen size 35 on the display element 23 as operation modes. Either of the adjustment modes can be selected by the input unit 45.

  Here, when the normal mode is selected, the control unit 43 temporarily stores the input image data to be displayed in the display image memory 41 and based on the display area address information stored in the display area memory 42. Thus, an image composed of the input image data is displayed in the display area 35 a corresponding to the display element 23 corresponding to the effective screen size 35. Here, the address information stored in the display area memory 42 is a preset default value or address information calculated in an adjustment mode described later.

  On the other hand, when the adjustment mode is selected, the control unit 43 adjusts the position of the display area 35a corresponding to the effective screen size 35 on the display element 23, for example, according to the flowchart shown in FIG.

  That is, when the adjustment mode is selected, the control unit 43 first reads the image data of the adjustment image 51 stored in the adjustment image memory 44 into the display image memory 41 (step S11). Next, the control unit 43 resets the address information of the display area stored in the display area memory 42 (step S12), and displays the adjustment image 51 including the image data read into the display image memory 41. Full screen display is performed on the displayable screen size 23a of the element 23 (step S13).

  As a result, as shown in FIG. 10, the adjustment image 51 that covers the visual field range 26a by the eyepiece optical unit 26 is displayed, and the observer displays the cell displayed at the center of the visual field range 26a. Position information can be input via the input unit 45. The input unit 45 can be configured to input the display position information by, for example, pressing a numeric keypad or a predetermined input button a plurality of times.

  Thereafter, when the control unit 43 detects that the display position information is input from the input unit 45 (step S14), the display area of the display element 23 corresponding to the effective screen size 35 based on the input display position information. The address 35a is calculated (step S15), and the address information is stored in the display area memory 42 (step S16). For example, as shown in FIG. 10, when the cell at the X position “35” and the Y position “46” is displayed at the center of the visual field range 26a and the display position information is input from the input unit 45, the control unit 11, the address of the display area 35a corresponding to the effective screen size 35 centered on the divided area corresponding to the X direction “35” and the Y direction “46” on the display element 23, as shown in FIG. The address information is calculated and stored in the display area memory 42. As a result, in the subsequent normal mode, an image having an effective screen size 35 can be observed in the visual field range 26a by the eyepiece optical unit 26.

  Therefore, in the head-mounted image display device 20 according to the present embodiment, the display area memory 42 and the control unit 43 constitute a display control unit, and the display area memory 42 and the control unit 43 and the adjustment image memory 44. The display unit is configured by the input unit 45. The display image memory 41, the display area memory 42, the control unit 43, and the adjustment image memory 44 shown in FIG. 7 are mounted on the video display unit 21 shown in FIGS. 1 and 2, and the input unit 45 is An input operation unit such as a numeric keypad or an input button can be provided on the outer surface of the video display unit 21 and mounted on the video display unit 21. The display image memory 41, the display area memory 42, and the control unit 43 are mounted on the video display unit 21, and the adjustment image memory 44 and the input unit 45 are provided in a separate housing from the video display unit 21, Various layouts are possible, such as wired or wireless connection.

  As described above, in the present embodiment, in the adjustment mode, the display element 23 having the displayable screen size 23a larger than the display area 35a corresponding to the effective screen size 35 that can be observed in the visual field range 26a by the eyepiece optical unit 26. The adjustment image 51 is displayed on the entire screen of the image, and the display position information of the cell displayed at the center of the visual field range 26a of the adjustment image 51 is input from the input unit 45, whereby the image of the effective screen size 35 is displayed. The position of the display area 35a is adjusted so that can be observed. Therefore, regardless of the attachment state of the head-mounted image display device 20 to the glasses 10, the size of the head of the observer, the degree of wearing of the glasses 10, etc., the observer can select the head-mounted image display device 20. Can be easily adjusted so that the image can be observed with the effective screen size 35 of the visual field range 26a in a state where the user wears the camera in a desired posture suitable for him.

(Second Embodiment)
FIGS. 12A and 12B are views showing position adjustment images used in the head-mounted image display device according to the second embodiment of the present invention. In this embodiment, in the head-mounted image display device 20 according to the first embodiment, a rough adjustment image 55 and a fine adjustment image 56 are used instead of the position adjustment image 51 shown in FIG. Image data of two position adjustment images is stored in the adjustment image memory 44 shown in FIG.

  Here, as shown in FIG. 12A, the coarse adjustment image 55 has a region corresponding to the entire displayable screen size of the display element 23 that is coarser than the adjustment image 51 shown in FIG. The display position information is recorded in each cell. Here, as the display position information of each cell, coordinates indicating the position in the X direction on the right side and the position in the Y direction on the left side are recorded. Further, as shown in FIG. 12B, the fine adjustment image 56 is obtained by dividing the screen size corresponding to the effective screen size 35 into a matrix with the same number of divisions as the coarse adjustment image 55. Similarly, display position information is recorded. Note that the size of each cell of the coarse adjustment image 55 is smaller than that of the fine adjustment image 56, and is such that some or all of the plurality of cells are located in the visual field range 26a. FIGS. 12A and 12B also show the visual field range 26 a of the eyepiece optical unit 26 in order to compare the sizes of the coarse adjustment image 55 and the fine adjustment image 56.

  The head-mounted image display device according to the present embodiment is different from the head-mounted image display device 20 according to the first embodiment in the operation of the adjustment mode shown in FIG. Therefore, hereinafter, the operation in the adjustment mode will be described using the reference numerals shown in the first embodiment, and the other configurations and operations are the same as those in the first embodiment, and the description thereof will be omitted.

  FIG. 13 is a flowchart showing the operation in the adjustment mode. When the adjustment mode is selected, the control unit 43 first reads the image data of the coarse adjustment image 55 stored in the adjustment image memory 44 into the display image memory 41 (step S21). Next, the control unit 43 resets the address information of the display area stored in the display area memory 42 (step S22), and displays the coarse adjustment image 55 including the image data read into the display image memory 41. It is displayed on the entire screen of the element 23 (step S23).

  As a result, as shown in FIG. 12A, the coarse adjustment image 55 that covers the visual field range 26a by the eyepiece optical unit 26 is displayed on the entire screen of the display element 23, and the visual field range is displayed by the observer. The display position information of the cell displayed at the center of 26 a can be input via the input unit 45. For example, in the case of FIG. 12A, since the cell “33” is displayed in the center of the visual field range 26a, the observer presses the X button provided in the input unit 45 three times and the Y button, for example. After operating three times, the display position information of the cell “33” can be input by operating the enter button.

  Thereafter, when the control unit 43 detects that the display position information of the coarse adjustment image 55 is input from the input unit 45 (step S24), the control unit 43 finely focuses on the cell position based on the input display position information. An address for displaying the adjustment image 56 is calculated, and the address information is stored in the display area memory 42. Then, the image data of the fine adjustment image 56 stored in the adjustment image memory 44 is read into the display image memory 41 (step S25). Next, the control unit 43 displays the fine adjustment image 56 based on the address information stored in the display area memory 42 (step S26) and is displayed at the center of the visual field range 26a by the observer. The display position information of the cell of the fine adjustment image 56 can be input via the input unit 45. For example, in the case of FIG. 12B, since the cell “32” is displayed at the center of the visual field range 26a, the display position information of the cell “32” can be input by the observer.

  Thereafter, when the control unit 43 detects that the display position information of the fine adjustment image 56 is input from the input unit 45 (step S27), it corresponds to the effective screen size 35 based on the input display position information. The address of the display area 35a of the display element 23 is calculated (step S28), and the address information is stored in the display area memory 42 (step S29). For example, as shown in FIG. 12B, when the cell “32” is displayed at the center of the visual field range 26a and the display position information is input from the input unit 45, the control unit 43 As shown, the address of the display area 35a corresponding to the effective screen size 35 centered on the cell “32” of the fine adjustment image 56 is calculated on the display element 23, and the address information is displayed in the display area memory 42. To store. As a result, in the subsequent normal mode, an image having an effective screen size 35 can be observed in the visual field range 26a by the eyepiece optical unit 26.

  According to the present embodiment, in the adjustment mode, it is possible to adjust in stages using two hierarchical position adjustment images, the coarse adjustment image 55 and the fine adjustment image 56. Compared to the case of the embodiment, the position of the display area 35a where the image of the effective screen size 35 can be observed can be adjusted more easily and with high accuracy.

(Third embodiment)
FIGS. 15A and 15B are views showing position adjustment images used in the head-mounted image display device according to the third embodiment of the present invention. In the present embodiment, as in the second embodiment, the image data of the two position adjustment images, ie, the coarse adjustment image 65 and the fine adjustment image 66 are converted into the adjustment image memory 44 shown in FIG. To store.

  Here, as shown in FIG. 15A, the coarse adjustment image 65 corresponds to the entire displayable screen size of the display element 23 as in the coarse adjustment image 55 shown in FIG. The area is roughly divided into a matrix and display position information is recorded in each cell. Further, as shown in FIG. 15B, the fine adjustment image 66 has a single cell size of the coarse adjustment image 65 and a plurality of screen sizes so as to surround the periphery, and the outermost screen size is effective. It is recorded as a visually recognizable image corresponding to the screen size 35.

  Hereinafter, the operation in the adjustment mode by the head-mounted image display device according to the present embodiment will be described using the reference numerals shown in the first embodiment. Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.

  FIG. 16 is a flowchart showing the operation in the adjustment mode. When the adjustment mode is selected, the control unit 43 first reads the image data of the coarse adjustment image 65 stored in the adjustment image memory 44 into the display image memory 41 (step S31). Next, the control unit 43 resets the address information of the display area stored in the display area memory 42 (step S32), and displays the coarse adjustment image 65 composed of the image data read into the display image memory 41. It is displayed on the entire screen of the element 23 (step S33).

  As a result, as shown in FIG. 15A, the coarse adjustment image 65 that covers the visual field range 26a by the eyepiece optical unit 26 is displayed and displayed by the observer at the center of the visual field range 26a. The display position information of the current cell can be input via the input unit 45. For example, in the case of FIG. 15A, since the cell “33” is displayed at the center of the visual field range 26a, the observer performs the same as described in the second embodiment via the input unit 45. The display position information of the cell “33” can be input.

  Thereafter, when the control unit 43 detects that the display position information of the coarse adjustment image 55 has been input from the input unit 45 (step S34), the control unit 43 finely focuses on the cell position based on the input display position information. An address for displaying the adjustment image 66 is calculated, and the address information is stored in the display area memory 42. Then, the image data of the fine adjustment image 66 stored in the adjustment image memory 44 is read into the display image memory 41 (step S35). Next, the control unit 43 displays the fine adjustment image 66 as shown in FIG. 15B based on the address information stored in the display area memory 42 (step S36). Thereby, the observer performs an adjustment operation for moving the display position of the fine adjustment image 66 on the display element 23 as shown in FIG. 15B, for example, by operating a movement key provided in the input unit 45. Is executed (step S37). In this adjustment operation, when the display position movement information is input from the input unit 45, the control unit 43 moves the display position of the fine adjustment image 66 on the display element 23 based on the movement information. Then, for example, at a desired display position shown in FIG. 17, display position determination information can be input by operating a determination key or the like provided on the input unit 45.

  Thereafter, when the control unit 43 detects that the determination information of the display position of the fine adjustment image 66 is input from the input unit 45 (step S38), the address information of the display position of the fine adjustment image 66 at the determination time point. Is stored in the display area memory 42 (step S39). As a result, in the subsequent normal mode, an image having an effective screen size 35 can be observed in the visual field range 26a by the eyepiece optical unit 26.

  According to the present embodiment, the fine adjustment image 66 corresponding to the effective screen size 35 is displayed movably on the display element 23 by the operation of the observer so that the observer can determine a desired display position. As a result, the position of the display area 35a can be adjusted with higher accuracy, and in the normal mode, the image is displayed at the display position set by the observer. It becomes possible to observe.

(Fourth embodiment)
In the head-mounted image display device according to the fourth embodiment of the present invention, image data of an adjustment image having a screen size corresponding to the effective screen size 35 is stored in the adjustment image memory 44 shown in FIG. To do. In the adjustment mode, the adjustment image stored in the adjustment image memory 44 is displayed at a predetermined position of the display element 23, and the display position can be moved and adjusted to a desired display position by operating the input unit 45. To do.

  Hereinafter, the operation in the adjustment mode by the head-mounted image display device according to the present embodiment will be described using the reference numerals shown in the first embodiment. Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.

  FIG. 18 is a flowchart showing the operation in the adjustment mode by the head-mounted image display apparatus according to the present embodiment. When the adjustment mode is selected, the control unit 43 first reads the image data of the adjustment image stored in the adjustment image memory 44 into the display image memory 41 (step S41). Next, the control unit 43 resets the address information of the display area stored in the display area memory 42 (step S42), and displays an adjustment image including the image data read into the display image memory 41 on the display element 23. Are displayed in a predetermined area (for example, the center) (step S43).

  As a result, the observer performs an adjustment operation for moving the display position of the adjustment image 71 on the display element 23 by, for example, operating a movement key provided in the input unit 45 as shown in FIG. S44). In this adjustment operation, when the display position movement information is input from the input unit 45, the control unit 43 performs fine adjustment image on the display element 23 based on the movement information as in the case of the third embodiment. The display position 66 is moved. Then, at a desired display position, display position determination information can be input by operating a determination key or the like provided on the input unit 45.

  Thereafter, as in the case of the third embodiment, when the control unit 43 detects that the determination information of the display position of the adjustment image 71 is input from the input unit 45 (step S45), the adjustment at the determination time is performed. Address information of the display position of the image 71 for use is stored in the display area memory 42 (step S46). As a result, in the subsequent normal mode, an image having an effective screen size 35 can be observed in the visual field range 26a by the eyepiece optical unit 26.

  In the above description, when displaying the adjustment image 71 for the first time, the address information of the display area stored in the display area memory 42 is reset, and the adjustment image 71 is placed in a predetermined area of the display element 23. Although displayed, the image for adjustment 71 can be displayed in the display area without resetting the address information stored in the display area memory 42, and the position can be adjusted starting from the display position. You can also

  According to the present embodiment, the display position is adjusted using the adjustment image 71 having a screen size corresponding to the effective screen size 35, so that the capacity of the adjustment image memory 44 is added to the effect of the third embodiment. There is an advantage that the cost can be reduced and the cost can be reduced.

(Fifth embodiment)
In the head-mounted image display device according to the fifth embodiment of the present invention, the adjustment image memory 44 shown in FIG. 7 is omitted, and the image is displayed on the display element 23 with a screen size corresponding to the effective screen size 35. The input image based on the input image data is used as an adjustment image, and its display position can be moved and adjusted in the same manner as in the fourth embodiment.

  FIG. 20 is a flowchart showing an outline of the operation of the head-mounted image display device according to the present embodiment. As shown in FIG. 20, in the present embodiment, during operation in the normal mode (step S51), the control unit 43 determines whether or not the operation mode has been switched to the adjustment mode (step S52), and adjustment is performed. When the mode is switched, the display position of the input image based on the input image data can be adjusted by the movement adjustment operation by the input unit 45 (step S53). When the display position is determined (step S54), the address information of the display position is stored in the display area memory 42 (step S55), the mode is automatically shifted to the normal mode, and thereafter stored in the display area memory 42. The input image is displayed at the displayed position. Other configurations and operations are the same as those in the first embodiment, and thus description thereof is omitted.

  As described above, if the input image based on the input image data is used as the adjustment image, the adjustment image memory 44 is not required, and there is an advantage that the cost can be further reduced.

  In addition, this invention is not limited only to the said embodiment, Many deformation | transformation or a change is possible. For example, in the configuration shown in FIGS. 1 and 2, the width of the projection cross section of the observation optical unit 22 in the visual axis direction of the observer is made smaller than the diameter of the pupil 30a throughout, but the eyepiece optical unit 26 It is possible to provide a see-through function by making only the light guide tip portion of the light guide portion 25 including the diameter smaller than the diameter of the pupil 30a.

  Further, the light guide unit 25 is not limited to a tapered shape that tapers from the incident end side to the emission end side of the image light, and as shown in a schematic diagram in FIG. 21, the displayable screen size of the display element 23 It is also possible to make the size uniform from the incident end side to the exit end side so that the image light from can be incident. Of course, also in this case, the width of the projection cross section in the visual axis direction of the observer can be made smaller than the diameter of the pupil to provide a see-through function. Furthermore, the observation optical unit 22 can be formed without providing a see-through function. Furthermore, the light guide unit 25 may be omitted, and the display element 23 may be held facing the eyepiece optical unit 26 so that a virtual image can be observed.

  Further, any of the adjustment modes described in the first to fifth embodiments can be selected by the observer so that the display area of the effective screen size can be adjusted. Further, the present invention is not limited to the right eye type as shown in FIGS. 1 and 2, but may be configured as a left eye type, or limited to a separated type in which the video display unit and the observation optical unit are separated. In addition, the present invention can also be effectively applied to an integrated head-mounted image display device in which these are integrated. Further, the present invention can be effectively applied not only to the spectacle wearing type but also to the spectacle integrated type as shown in FIG. 23 and the headset type head mounted image display apparatus as shown in FIG.

10 glasses 11R temple 12R right eye lens 13R armor
14R Hinges 15R Screws 20 Head-mounted image display device 21 Video display unit 21a Window unit 22 Observation optical unit 23 Display element 23a Displayable screen size 24 Mounting unit 25 Light guide unit 26 Eyepiece optical unit 26a Field of view 30 Eyeball 30a Pupil 35 Effective screen size 35a Display area 41 Display image memory 42 Display area memory 43 Control unit 44 Adjustment image memory 45 Input unit 51,71 Adjustment image 55,65 Coarse adjustment image 56,66 Fine adjustment image

Claims (7)

An eyepiece optical unit disposed in the field of view of one eyeball of the observer in a state of being mounted on the observer's head, and a display element for displaying an image, and an image displayed on the display element In a head-mounted image display device that causes image light to enter the eyeball of the observer through the eyepiece optical unit,
The display element has a displayable screen size larger than a screen size corresponding to a predetermined effective screen size that can be observed in a visual field range by the eyepiece optical unit,
A display area adjusting means for controlling an address of a display area corresponding to the effective screen size in the display element;
The display area is adjusted by controlling the display area address corresponding to the effective screen size in the display element by the display area adjusting means so that the image of the effective screen size can be observed in the visual field range by the eyepiece optical unit. A head-mounted image display device characterized by being configured. The length of the diagonal line of the displayable screen size is P, the focal length of the eyepiece optical unit on the display element side is f, the diameter of the pupil of the eyeball is d, the distance from the pupil to the eyepiece optical unit is W, When the length of the diagonal line of the eyepiece optical unit is D,
P / 2 / f> d / 2 / W, P / 2 / f> D / 2 / W
The head-mounted image display device according to claim 1, wherein the head-mounted image display device is configured to satisfy the above.   A light guide part for guiding image light from the display element to the eyepiece optical part, and a projection cross section in an observer's visual axis direction at least at a light guide tip part of the light guide part including the eyepiece optical part; The head-mounted image display device according to claim 1, wherein a width of the head is 4 mm or less smaller than a diameter of a pupil of the eyeball.   The light guide unit has a width of a projection cross section in the visual axis direction of an observer from an incident end side where image light is incident from the display element to an emission end side where the image light is emitted to the eyepiece optical unit. The head-mounted image display device according to claim 3, wherein the head-mounted image display device has a tapered shape that decreases toward the head. The display area adjusting means includes
An adjustment image memory for storing image data of an adjustment image including display position information on the display element;
An input unit for inputting desired display position information of the image for adjustment displayed on the display element;
A display control unit that controls an address of a display area corresponding to the effective screen size in the display element, based on the display position information input from the input unit;
The head-mounted image display device according to claim 1, wherein The display area adjusting means includes
An adjustment image memory for storing image data of an adjustment image having a screen size corresponding to the effective screen size;
An input unit for inputting display position movement information of the adjustment image displayed on the display element;
A display control unit that moves the display position of the adjustment image on the display element based on the display position movement information input from the input unit;
The head-mounted image display device according to any one of claims 1 to 4, wherein the head-mounted image display device is provided. The display area adjusting means includes
An input unit for inputting display position movement information of an input image having a screen size corresponding to the effective screen size displayed on the display element;
A display control unit that moves the display position of the input image on the display element based on the display position movement information input from the input unit;
The head-mounted image display device according to any one of claims 1 to 4, wherein the head-mounted image display device is provided.

Images