Head-mount display

Abstract

To realize a head-mount display with which, while suppressing increase in a cost, it is possible to expand a visual field of a head-mount display.SOLUTION: A head-mount display (1) according to one embodiment of the present disclosure comprises: a display panel (3) located on the front of a user; a display control unit (9) for displaying front view video in a front display region of the display panel (3) as seen from the user and displaying outside view video in an outside display region of the display panel (3) with respect to the front display region as seen from the user; a lens for focusing display light emitted from the front display region in order to display front view video in the front display region on the eyes of the user; and a concave mirror for causing display light emitted from the outside display region in order to display outside view video in the outside display region to be reflected toward the eyes of the user and focused on the eyes of the user.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a head mounted display. [Background technology]

[0002] The field of view of current head mounted displays is about 110° to 120°, and head mounted displays that reproduce the human field of view of 180° or more have not yet been put to practical use. In order to create a higher sense of immersion, a head mounted display that reproduces the human field of view is desired. In response to this, Patent Document 1 discloses a head mounted display that uses lenses and side displays to expand the field of view of the head mounted display to the same level as the human field of view. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-108012 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the head mounted display of Patent Document 1 has a configuration in which a side display is used in addition to a front display to expand the field of view of the head mounted display, which poses a problem of significant increase in costs.

[0005] The object of the present disclosure has been made to solve the above-mentioned problems, and to realize a head mounted display that can expand the field of view of the head mounted display while suppressing increases in costs. [Means for solving the problem]

[0006] A head mounted display according to an embodiment of the present disclosure includes: A display panel disposed in front of a user; a display control unit that displays a front view image in a front display area of ​​the display panel as viewed from the user, and displays an outer view image in an outer display area of ​​the display panel with respect to the front display area as viewed from the user; a lens that focuses display light emitted from the front display area to an eye of the user in order to display the front view image in the front display area; a concave mirror that reflects display light emitted from the outer display area toward the user's eye to display the outer field of view image in the outer display area, and focuses the light on the user's eye; Equipped with. Effect of the Invention

[0007] According to the present disclosure, it is possible to realize a head mounted display that can expand the field of view of the head mounted display while suppressing increases in costs. [Brief description of the drawings]

[0008] [Figure 1] 1A and 1B are diagrams for explaining a configuration of a head mounted display according to an embodiment. [Diagram 2] FIG. 2 is a block diagram showing the configuration of a control system of the head mounted display according to the embodiment. [Diagram 3] A figure for explaining the cut-out ranges in which the display control unit in the head-mounted display of the embodiment cuts out the left eye front view image, the right eye front view image, the left eye outer view image, and the right eye outer view image from the captured image. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, specific embodiments to which the present disclosure is applied will be described in detail with reference to the drawings. However, the present disclosure is not limited to the following embodiments, and the following description and drawings are appropriately simplified.

[0010] Fig. 1 is a diagram for explaining the configuration of the head mounted display of this embodiment. Fig. 2 is a block diagram showing the configuration of a control system of the head mounted display of this embodiment. In the following explanation, the front-rear direction, left-right direction, and up-down direction of the head mounted display are defined based on the user wearing the head mounted display.

[0011] The head mounted display 1 of the present embodiment is applicable to various uses such as games, entertainment, industry, medical use, flight simulators, etc. The head mounted display 1 is, for example, a VR (Virtual Reality) head mounted display or an MR (Mixed Reality) head mounted display.

[0012] The head mounted display 1 is worn by a user (not shown). As shown in Fig. 1 and Fig. 2, the head mounted display 1 includes a frame 2, a display panel 3, a left eye optical system 4, a right eye optical system 5, a first shielding unit 6, a second shielding unit 7, a third shielding unit 8, and a display control unit 9.

[0013] The frame 2 has a goggle or eyeglass shape and is worn on the user's head by a headband (not shown) or the like. A display panel 3, a left eye optical system 4, a right eye optical system 5, a first shielding unit 6, a second shielding unit 7, a third shielding unit 8, and a display control unit 9 are attached to the frame 2.

[0014] Although FIG. 1 illustrates a binocular head mounted display 1, the display may be a head mounted display having a eyeglasses shape or a monocular head mounted display.

[0015] The display panel 3 includes a display device such as a liquid crystal panel or an organic EL (Electro Luminescence) panel. As shown in Fig. 1, the display panel 3 is disposed in front of the user when the user wears the head mounted display 1.

[0016] The display panel 3 may be either a flat panel or a curved panel. As shown in Fig. 1, the display panel 3 includes a left eye front display area 3a, a right eye front display area 3b, a left eye outer display area 3c, and a right eye outer display area 3d.

[0017] 1, the left eye front display area 3a, the right eye front display area 3b, the left eye outer display area 3c, and the right eye outer display area 3d are distinguished by hatching. In this case, the left eye front display area 3a, the right eye front display area 3b, the left eye outer display area 3c, and the right eye outer display area 3d may be arranged on one display panel 3.

[0018] However, it may be divided into a left eye display panel in which a left eye front display area 3a and a left eye outer display area 3c are arranged, and a right eye display panel in which a right eye front display area 3b and a right eye outer display area 3d are arranged.

[0019] The left-eye front display region 3a is disposed in front of a left-eye position P1 at which a user's left eye EL is disposed, as shown in Fig. 1. The left-eye front display region 3a emits a first display light L1 toward the rear in order to display a left-eye front field of view image.

[0020] The right-eye front display region 3b is disposed in front of a right-eye position P2 where the right eye ER of the user is disposed, as shown in Fig. 1. The right-eye front display region 3b emits the second display light L2 toward the rear side to display a right-eye front view image. Here, the distance between the left-eye position P1 and the right-eye position P2 may be, for example, approximately equal to the interpupillary distance of a typical user.

[0021] The left-eye outer display region 3c is disposed on the left side of the left-eye front display region 3a as shown in Fig. 1. The left-eye outer display region 3c emits the third display light L3 toward the rear side in order to display a left-eye outer visual field image.

[0022] The right-eye outer display region 3d is disposed on the right side of the right-eye front display region 3b as shown in Fig. 1. The right-eye outer display region 3d emits the fourth display light L4 toward the rear side in order to display a right-eye outer visual field image.

[0023] 1, the left-eye optical system 4 includes a lens 4a and a concave mirror 4b. The lens 4a is disposed between the left-eye position P1 and the left-eye front display area 3a of the display panel 3. The lens 4a has, for example, a convex shape on the front and rear sides.

[0024] 1, the lens 4a guides the first display light L1 to the left eye position P1. At this time, the lens 4a may focus the first display light L1 at the left eye position P1 within a range of about 60° of the field of view of the user's left eye EL placed at the left eye position P1 (that is, ±30° when the front side is set to 0° with the left eye EL as the center and the counterclockwise direction as viewed from above is set to the positive direction), for example.

[0025] The concave mirror 4b is disposed on the diagonally left rear side of the lens 4a, for example, as shown in FIG. 1. The concave mirror 4b has, for example, a spherical surface that is convex toward the diagonally left rear side. The concave mirror 4b guides the third display light L3 to the left eye position P1. At this time, the concave mirror 4b horizontally inverts the left eye outer visual field image formed by the third display light L3 and guides it to the left eye position P1.

[0026] Here, the concave mirror 4b is preferably positioned so that the range in which the user views the first display light L1 through the lens 4a and the range in which the user views the third display light L3 through the concave mirror 4b are continuous.

[0027] Therefore, for example, if the front side is 0° with the left eye EL as the center, and counterclockwise when viewed from above is the positive direction, the concave mirror 4b may focus the third display light L3 at the left eye position P1 within a range of approximately 30° to 90° of the field of view of the user's left eye EL positioned at the left eye position P1.

[0028] As shown in Figure 1, when viewed from the top-bottom direction, the right-eye optical system 5 has a symmetrical configuration with a central axis AX1 that passes through the center in the left-right direction between the left-eye optical system 4 and the head-mounted display 1 and extends in the front-to-back direction.

[0029] Therefore, although detailed explanation is omitted, the right eye optical system 5 includes a lens 5a that directs the second display light L2 to the right eye position P2, and a concave mirror 5b that directs the fourth display light L4 to the right eye position P2, as shown in FIG. 1.

[0030] The first shielding portion 6 prevents the first display light L1 from entering the right eye position P2 and the second display light L2 from entering the left eye position P1. The first shielding portion 6 is a plate-like member capable of absorbing light (i.e., optically shielding), and is disposed, for example, between the lens 4a of the left eye optical system 4 and the lens 5a of the right eye optical system 5, as shown in FIG.

[0031] 1, for example, the front end of the first shielding portion 6 may be disposed near a portion between the left-eye front display area 3a and the right-eye front display area 3b of the display panel 3. The rear end of the first shielding portion 6 may be disposed rearward of the lens 4a of the left-eye optical system 4 and the lens 5a of the right-eye optical system 5.

[0032] The second shielding portion 7 prevents the first display light L1 from entering the concave mirror 4b of the left-eye optical system 4 and prevents the third display light L3 from entering the lens 4a of the left-eye optical system 4. The second shielding portion 7 is a plate-like member capable of absorbing light, and is disposed so as to incline toward the right as it approaches the front side, for example, as shown in FIG.

[0033] 1, the front end of the second shielding portion 7 may be disposed near the boundary between the left-eye front display area 3a and the left-eye outer display area 3c of the display panel 3. The rear end of the second shielding portion 7 may be disposed near the left end of the lens 4a of the left-eye optical system 4.

[0034] Therefore, as shown in Figure 1, the second shielding portion 7 may be arranged between a first optical path LP1 from the left end of the left-eye front display area 3a of the display panel 3 in the first display light L1 toward the lens 4a of the left-eye optical system 4, and a second optical path LP2 from the right end of the left-eye outer display area 3c of the display panel 3 in the third display light L3 toward the concave mirror 4b of the left-eye optical system 4.

[0035] As shown in Figure 1, when viewed from the top and bottom, the third shielding portion 8 has a left-right symmetrical configuration with the second shielding portion 7 and the central axis AX1 as the axis of symmetry, so detailed explanation is omitted, but the third shielding portion 8 is arranged to prevent the second display light L2 from entering the concave mirror 5b of the right-eye optical system 5 and the fourth display light L4 from entering the lens 5a of the right-eye optical system 5.

[0036] In this case, too, the third shielding portion 8 may be arranged between a third optical path LP3 extending from the right end of the right-eye front display area 3b of the display panel 3 in the second display light L2 toward the lens 5a of the right-eye optical system 5, and a fourth optical path LP4 extending from the left end of the right-eye outer display area 3d of the display panel 3 in the fourth display light L4 toward the concave mirror 5b of the right-eye optical system 5, as shown in FIG.

[0037] The display control unit 9 controls the display panel 3 to display a left-eye front view image in the left-eye front display area 3a of the display panel 3, while displaying a left-eye outer view image in the left-eye outer display area 3c of the display panel 3.

[0038] In addition, the display control unit 9 controls the display panel 3 to display a right-eye front view image in the right-eye front display area 3b of the display panel 3, while displaying a right-eye outer view image in the right-eye outer display area 3d of the display panel 3.

[0039] For example, Fig. 3 is a diagram for explaining the cut-out ranges in which the display control unit in the head mounted display of the present embodiment cuts out the left eye front view image, the right eye front view image, the left eye outer view image, and the right eye outer view image from the captured image. Note that Fig. 3 is a diagram showing one viewpoint of the captured image captured 180° in front by a 360° camera.

[0040] For example, as shown in FIG. 3, the display control unit 9 cuts out a 120° angle of view of the captured image based on the left eye position P1 as a left eye front view image, and cuts out a 120° angle of view of the captured image based on the right eye position P2 as a right eye front view image.

[0041] In addition, for example, as shown in Figure 3, the display control unit 9 cuts out the left side of the captured image with a field of view of 120° to 180° based on the left eye placement position P1 as an outer field of view image for the left eye, and cuts out the right side of the captured image with a field of view of 120° to 180° based on the right eye placement position P2 as an outer field of view image for the right eye.

[0042] Then, the display control unit 9 displays the left eye front view image, right eye front view image, left eye outer view image, and right eye outer view image cut out from the captured image in the left eye front view display area 3a, right eye front view display area 3b, left eye outer display area 3c, and right eye outer display area 3d of the display panel 3, respectively.

[0043] At this time, the concave mirror 4b of the left eye optical system 4 inverts the left eye outer field image left and right and directs it to the left eye position P1, and the concave mirror 5b of the right eye optical system 5 inverts the right eye outer field image left and right and directs it to the right eye position P2.

[0044] Therefore, the display control unit 9 inverts the left eye outer field of view image and the right eye outer field of view image cut out from the captured image, respectively, and displays them in the left eye outer display area 3c and the right eye outer display area 3d of the display panel 3.

[0045] In addition, when the user views the left eye front view image, the right eye front view image, the left eye outer view image, and the right eye outer view image with the left eye EL and right eye ER, the display control unit 9 may correct each image before displaying them on the display panel 3 so that distortion or the like does not occur in each image.

[0046] As described above, the head mounted display 1 of this embodiment includes an outer display area 3c for the left eye and an outer display area 3d for the right eye of the display panel 3, a concave mirror 4b of the optical system 4 for the left eye, and a concave mirror 5b of the optical system 5 for the right eye.

[0047] Therefore, when a user wears the head mounted display 1 of this embodiment, the user can view not only a left eye front view image and a right eye front view image, but also a left eye outer view image and a right eye outer view image. As a result, the head mounted display 1 of this embodiment can realize a field of view of, for example, about 180°, and can create a high sense of immersion.

[0048] Moreover, the head mounted display 1 of the present embodiment forms the front display area and the outer display area using, for example, one display panel 3, and does not require a separate display to widen the field of view. Therefore, the head mounted display 1 of the present embodiment can widen the field of view of the head mounted display while suppressing an increase in cost compared to the head mounted display of Patent Document 1.

[0049] In this embodiment, the display control unit 9 cuts out each image from the captured image as shown in Figure 3, but the cut-out range can be changed as appropriate depending on the angle of view of the captured image and the ratio of the field of view shared by the front display area and the outer display area, respectively.

[0050] In addition, the head mounted display 1 of this embodiment achieves a field of view of, for example, about 180°, but in order to achieve a wider field of view, the concave mirror 4b of the left eye optical system 4 may be positioned further back from the lens 4a, and the concave mirror 5b of the right eye optical system 5 may be positioned further back from the lens 5a.

[0051] The present disclosure is not limited to the present embodiment, and can be modified as appropriate without departing from the spirit and scope of the present disclosure. [Explanation of symbols]

[0052] 1. Head-mounted display 2 Frames 3 display panel, 3a front display area for left eye, 3b front display area for right eye, 3c outer display area for left eye, 3d outer display area for right eye 4 Optical system for left eye, 4a lens, 4b concave mirror 5 Optical system for right eye, 5a lens, 5b concave mirror 6 First shielding part 7 Second shielding section 8 Third shield 9. Display control section AX1 center axis EL left eye ER right eye L1 First indicator light L2 Second indicator light L3 3rd indicator light L4 4th indicator light LP1, LP2, LP3, LP4 optical path P1 Left eye placement position P2 Right eye placement position

Claims

1. A display panel disposed in front of a user; a display control unit that displays a front view image in a front display area of ​​the display panel as viewed from the user, and displays an outer view image in an outer display area of ​​the display panel with respect to the front display area as viewed from the user; a lens that focuses display light emitted from the front display area to an eye of the user in order to display the front view image in the front display area; a concave mirror that reflects display light emitted from the outer display area toward the user's eye to display the outer field of view image in the outer display area, and focuses the light on the user's eye; Equipped with Head-mounted display.

2. the concave mirror is disposed so that a range in which the user views the display light emitted from the front display area through the lens and a range in which the user views the display light emitted from the outer display area through the concave mirror are continuous with each other. The head mounted display according to claim 1 .

3. The display control unit displays the left-right inverted outer field of view image in the outer display area. The head mounted display according to claim 1 or 2.

4. a shielding portion that optically shields an optical path along which the display light emitted from the front display area travels from an end of the front display area on the outer display area side to the lens, and an optical path along which the display light emitted from the outer display area travels from an end of the outer display area on the front display area side to the concave mirror, The head mounted display according to claim 1 or 2.

5. The front display area and the outer display area are disposed so as to be continuous in the left-right direction on a single display panel. The head mounted display according to claim 1 or 2.

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