JP2022022078A - Three-dimensional display device, head-up display, and movable body - Google Patents

Abstract

To provide a three-dimensional display device that allows a user to appropriately visually recognize a three-dimensional image.SOLUTION: A three-dimensional display device 1 comprises a display panel 5, a barrier unit 6, a detection unit 2, and a control unit 7. The display panel 5 displays a parallax image including a first image and a second image having parallax with respect to the first image. The barrier unit 6 defines a direction of travel of image light of the parallax image and provides parallax to a first eye and a second eye of a user. The detection unit 2 picks up an image of the face of the user who visually recognizes the parallax image. The control unit 7 composes the first image and the second image different from each other to create a first reference image based on an index defining the arrangement of the first image and the second image displayed on the display panel 5, and displays the first reference image on the display panel 5. The control unit 7 adjusts the index based on the image of the face of the user picked up by the detection unit 2 and on which the first reference image is projected.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a three-dimensional display device, a head-up display and a moving body.

Conventionally, in order to perform a three-dimensional display without using glasses, a part of the light emitted from the display panel reaches the right eye, and the other part of the light emitted from the display panel reaches the left eye. A three-dimensional display device including an optical element is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-166259

In the above-mentioned three-dimensional display device, it is required for the user to appropriately visually recognize the three-dimensional image.

The three-dimensional display device according to the embodiment of the present disclosure includes a display panel, a barrier unit, a detection unit, and a control unit. The display panel is configured to display a parallax image including a first image and a second image having parallax with respect to the first image. The barrier portion is configured to give parallax to the first eye and the second eye of the user by defining the traveling direction of the image light of the parallax image. The detection unit is configured to capture the face of the user who is visually recognizing the parallax image. The control unit synthesizes the first image and the second image that are different from each other based on a predetermined index that defines the arrangement of the first image and the second image displayed on the display panel, and first. A reference image is generated, and the first reference image is displayed on the display panel. The control unit adjusts the index based on the image of the user's face imaged by the detection unit on which the first reference image is projected.

The head-up display according to the embodiment of the present disclosure includes a display panel, a barrier unit, an optical member, a detection unit, and a control unit. The display panel is configured to display a parallax image including a first image and a second image having parallax with respect to the first image. The barrier portion is configured to give parallax to the first eye and the second eye of the user by defining the traveling direction of the image light of the parallax image. The optical member is configured to make the user visually recognize the image light emitted from the display panel as a virtual image. The detection unit is configured to capture the face of the user who is visually recognizing the parallax image. The control unit synthesizes the first image and the second image that are different from each other based on a predetermined index that defines the arrangement of the first image and the second image displayed on the display panel, and first. A reference image is generated, and the first reference image is displayed on the display panel. The control unit adjusts the index based on the image of the user's face imaged by the detection unit on which the first reference image is projected.

The mobile body according to the embodiment of the present disclosure includes a head-up display. The head-up display includes a display panel, a barrier unit, an optical member, a detection unit, and a control unit. The display panel is configured to display a parallax image including a first image and a second image having parallax with respect to the first image. The barrier portion is configured to give parallax to the first eye and the second eye of the user by defining the traveling direction of the image light of the parallax image. The optical member is configured to make the user visually recognize the image light emitted from the display panel as a virtual image. The detection unit is configured to capture the face of the user who is visually recognizing the parallax image. The control unit synthesizes the first image and the second image that are different from each other based on a predetermined index that defines the arrangement of the first image and the second image displayed on the display panel, and first. A reference image is generated, and the first reference image is displayed on the display panel. The control unit adjusts the index based on the image of the user's face imaged by the detection unit on which the first reference image is projected.

According to the three-dimensional display device, the head-up display, and the moving body according to the embodiment of the present disclosure, the user can appropriately visually recognize the three-dimensional image.

It is a figure which shows the example which looked at the 3D display device which concerns on one Embodiment of this disclosure from the vertical direction. It is a figure which shows the example which looked at the display panel of the 3D display device shown in FIG. 1 from the depth direction. It is a figure which shows the example which looked at the barrier part of the 3D display device shown in FIG. 1 from the depth direction. It is a figure for demonstrating the left visible region in the display panel of the 3D display apparatus shown in FIG. It is a figure for demonstrating the right visible area in the display panel of the 3D display apparatus shown in FIG. It is a figure for demonstrating the information for identifying the position of a left eye and the position of a right eye. It is a figure which shows the example of the image table which shows the correspondence between the position of the left eye and the right eye, and the image to be displayed in each subpixel when the distance between eyes is a standard distance. It is a figure which shows the example of the reference image used for adjusting an index. It is a figure which shows the example of the image of the user which the reference image is projected, which is imaged by the detection unit. It is a figure for demonstrating origin correction. It is a flowchart explaining an example of the process for adjusting an index. It is a figure for demonstrating the binocular visible region in the 3D display system shown in FIG. It is a figure which shows the example of the image of the user which the reference image is projected, which is imaged by the detection unit. It is a figure for demonstrating the correction process of the inter-eye distance. It is a figure which shows the head-up display which concerns on one Embodiment of this disclosure. It is a figure which shows the moving body which concerns on one Embodiment of this disclosure.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The figures used in the following description are schematic. The dimensional ratios on the drawings do not always match the actual ones.

FIG. 1 is a diagram showing an example of a three-dimensional display device according to an embodiment of the present disclosure viewed from above and below. The three-dimensional display device 1 according to the present embodiment includes a display panel 5, a barrier unit 6, a detection unit 2, and a control unit 7.

The detection unit 2 is configured to capture an image of the user's face. The detection unit 2 is configured to capture the face of the user who is visually recognizing the three-dimensional image displayed by the three-dimensional display device 1. The detection unit 2 may detect the position of the left eye 15L and the position of the right eye 15R of the user and output the position to the control unit 7. The detection unit 2 may include, for example, a camera. The detection unit 2 may take an image of the user's face with a camera. The detection unit 2 may detect the position of the left eye 15L and the position of the right eye 15R from the image of the user's face captured by the camera. The detection unit 2 may detect the positions of the left eye 15L and the right eye 15R as the coordinates in the three-dimensional space from the captured image of one camera. The detection unit 2 may detect the position of the left eye 15L and the position of the right eye 15R as the coordinates in the three-dimensional space from the images captured by two or more cameras. The detection unit 2 may detect a three-dimensional image projected on the user's face from the image captured by the camera. The left eye 15L is also referred to as the first eye. The right eye 15R is also referred to as the second eye. When the left eye 15L and the right eye 15R are not distinguished, the left eye 15L and the right eye 15R are collectively referred to as the eye 15.

The detection unit 2 may include a visible light camera or an infrared camera. The detection unit 2 may include both a visible light camera and an infrared camera. The detection unit 2 may have the functions of both a visible light camera and an infrared camera. The detection unit 2 may include, for example, a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor.

The detection unit 2 may not be provided with a camera and may be connected to a camera outside the device. The detection unit 2 may include an input terminal for inputting a signal from a camera outside the device. Cameras outside the device may be directly connected to the input terminals. Cameras outside the device may be indirectly connected to the input terminals via a shared network. The detection unit 2 without a camera may include an input terminal for inputting a video signal by the camera. The detection unit 2 without a camera may detect the positions of the left eye and the right eye from the video signal input to the input terminal.

The detection unit 2 may include, for example, a sensor. The sensor may be an ultrasonic sensor, an optical sensor, or the like. The detection unit 2 may detect the position of the user's head by a sensor and detect the positions of the left eye 15L and the right eye 15R based on the position of the head. The detection unit 2 may detect the positions of the left eye 15L and the right eye 15R as coordinate values in three-dimensional space by one or two or more sensors.

The three-dimensional display device 1 does not have to include the detection unit 2. When the three-dimensional display device 1 does not include the detection unit 2, the three-dimensional display device 1 may include an input terminal for inputting a signal from a detection device outside the device. A detection device outside the device may be connected to an input terminal. The detection device outside the device may use an electric signal and an optical signal as a transmission signal to the input terminal. The detection device outside the device may be indirectly connected to the input terminal via a shared communication network. The three-dimensional display device 1 may be configured to input position coordinates indicating the positions of the left eye and the right eye acquired from a detection device outside the device.

The detection unit 2 may have a function of detecting the position of the user's eye 15. The detection unit 2 does not have to have a function of detecting the position of the eye 15. The three-dimensional display device 1 may be configured such that the control unit 7 detects the position of the eye 15, or may have a position acquisition unit 3 that detects the position of the eye 15 and outputs the position to the control unit 7.

The display panel 5 displays a parallax image including a left eye image (first image) and a right eye image (second image) having a parallax with respect to the left eye image. The left eye image is an image projected on the user's first eye 15L, and the right eye image is an image projected on the user's second eye 15R. The parallax image is also referred to as a mixed image. The barrier unit 6 is an optical element that defines the traveling direction of the image light emitted from the display panel 5. The barrier portion 6 is also referred to as a parallax barrier. The control unit 7 combines the first image and the second image to generate a parallax image. The control unit 7 may synthesize the first image and the second image based on at least one of the position of the first eye 15L and the position of the second eye 15R detected by the detection unit 2.

The control unit 7 displays the generated parallax image on the display panel 5. The display panel 5 may have a plurality of display areas in the active area. Each of the plurality of display areas may correspond to any of a plurality of reference indexes. The reference index is also simply referred to as an index. The control unit 7 synthesizes the parallax images to be displayed in each of the plurality of display areas with reference to the reference index of the display areas.

The display panel 5 may be a transmissive display panel or a self-luminous display panel. As the transmissive display panel, for example, a liquid crystal display panel can be used. Examples of the self-luminous display panel include a light emitting diode (LED) element, an organic electro luminescence (OEL) element, an organic light emitting diode (OLED) element, and a semiconductor laser (Laser). A display panel including a self-luminous element such as a Diode; LD) element can be used. In this embodiment, a liquid crystal display panel is used as the display panel 5.

When the display panel 5 is a transmissive display panel, the three-dimensional display device 1 includes an irradiator 4. The irradiator 4 can irradiate the display panel 5 with light in a plane. The irradiator 4 may be configured to include a light source, a light guide plate, a diffusion plate, a diffusion sheet, and the like. The irradiator 4 emits irradiation light by a light source, and the irradiation light can be made uniform in the surface direction of the display panel 5 by a light guide plate, a diffusion plate, a diffusion sheet, or the like. The irradiator 4 may emit uniformed light toward the display panel 5.

The irradiator 4 includes a visible light source that emits visible light. The visible light source may be, for example, an LED element, a cold cathode fluorescent lamp, a halogen lamp or a xenon lamp. The irradiator 4 may be configured to include an infrared light source that emits infrared light. The infrared light source may be, for example, an infrared LED element. The three-dimensional display device 1 may be configured to drive the visible light source and the infrared light source separately. When the three-dimensional display device 1 drives a visible light source and an infrared light source, the three-dimensional image displayed by the three-dimensional display device 1 includes a visible light component and an infrared light component. When the three-dimensional display device 1 drives only an infrared light source, the three-dimensional image displayed by the three-dimensional display device 1 contains only an infrared light component. When the detection unit 2 includes an infrared camera or the detection unit 2 has the function of an infrared camera, the detection unit 2 can detect the infrared light component of the three-dimensional image projected on the user's face.

The irradiator 4 may be configured to include a plurality of infrared LED elements. The plurality of infrared LED elements may be dispersedly arranged in the entire irradiator 4, or may be unevenly arranged in a part of the irradiator 4. The irradiator 4 may have a configuration in which a visible light light source is arranged at the center of the light emitting surface thereof, and a plurality of infrared LED elements are arranged so as to surround the periphery of the visible light light source.

As shown in FIG. 2, for example, the display panel 5 has a plurality of compartmentalized areas on the active area 51 formed in a planar shape. The active area 51 displays a parallax image. The parallax image includes a first image and a second image having a parallax with respect to the first image. The compartmentalized area is a region partitioned by a grid-like black matrix 52 in a first direction and a second direction orthogonal to the first direction. The direction orthogonal to the first direction and the second direction is referred to as a third direction. The first direction may be referred to as the horizontal direction. The second direction may be referred to as the vertical direction. The third direction may be referred to as the depth direction. The first direction, the second direction, and the third direction are not limited to these, respectively. In the drawings, the first direction is represented as the x-axis direction, the second direction is represented as the y-axis direction, and the third direction is represented as the z-axis direction.

One subpixel corresponds to each of the compartment areas. Therefore, the active area 51 includes a plurality of sub-pixels arranged in a grid pattern along the horizontal direction and the vertical direction.

Each sub-pixel corresponds to any of the colors red (R), green (G), and blue (B), and one pixel can be composed of three sub-pixels R, G, and B as a set. .. One pixel can be referred to as one pixel. The horizontal direction is, for example, a direction in which a plurality of subpixels constituting one pixel are arranged. The vertical direction is, for example, the direction in which subpixels of the same color are lined up.

A plurality of sub-pixels arranged in the active area 51 as described above constitute a sub-pixel group Pg. The subpixel group Pg is repeatedly arranged in the horizontal direction. The sub-pixel group Pg is repeatedly arranged adjacent to a position shifted by one sub-pixel in the horizontal direction in the vertical direction. The subpixel group Pg includes subpixels in a predetermined row and column. Specifically, the subpixel group Pg has b (b rows) in the vertical direction, 2 × n (n columns) in the horizontal direction, and (2 × n × b) subpixels arranged continuously. Includes P1 to Pk (k = 2 × n × b). In the example shown in FIG. 2, n = 6 and b = 1. In the active area 51, a subpixel group Pg including 12 subpixels P1 to P12 arranged in succession, one in the vertical direction and 12 in the horizontal direction, is arranged. In the example shown in FIG. 2, some subpixel groups Pg are coded.

The sub-pixel group Pg is the smallest unit in which the control unit 7 controls to display an image. The sub-pixels P1 to Pk (k = 2 × n × b) having the same identification information of all the sub-pixel groups Pg are simultaneously controlled by the control unit 7. For example, when the control unit 7 switches the image to be displayed on the subpixel P1 from the left eye image to the right eye image, the control unit 7 simultaneously changes the image to be displayed on the subpixel P1 in all the subpixel group Pg from the left eye image to the right eye image. Can be switched.

(Parallax barrier)
As shown in FIG. 1, the barrier portion 6 is formed by a plane along the active area 51. The barrier portion 6 may be arranged at a distance of a predetermined distance (gap) g from the active area 51. The barrier portion 6 may be located on the opposite side of the irradiator 4 with respect to the display panel 5. The barrier portion 6 may be located on the irradiator 4 side of the display panel 5.

The barrier portion 6 may be configured to be movable in the traveling direction of the image light emitted from the display panel 5. In other words, the barrier portion 6 may be configured to be movable in the third direction shown in FIG. The three-dimensional display device 1 may include a drive unit 11 that drives the barrier unit 6 in the third direction. The drive unit 11 may be controlled by the control unit 7. The drive unit 11 may drive the barrier unit 6 in the third direction by a motor, a piezoelectric element, or the like. The drive unit 11 may drive the barrier unit 6 in the positive direction in the third direction, or may drive the barrier unit 6 in the negative direction in the third direction.

As shown in FIG. 3, the barrier portion 6 defines the light ray direction, which is the propagation direction of the image light emitted from the subpixel, for each of the translucent regions 62, which are a plurality of strip-shaped regions extending in a predetermined direction in the plane. .. The predetermined direction is a direction forming a predetermined angle other than 0 degrees with the vertical direction. As shown in FIG. 1, by defining the image light emitted from the sub-pixels arranged in the active area 51 by the barrier portion 6, the area on the active area 51 visible to the user's eyes 15 is determined. .. Hereinafter, the area in the active area 51 that emits the image light propagating to the position of the user's eye 15 is referred to as a visible area 51a. The area in the active area 51 that emits the image light propagating to the position of the user's left eye 15L is referred to as the left visible area 51aL (first visible area). The area in the active area 51 that emits the image light propagating to the position of the user's right eye 15R is referred to as the right visible area 51aR (second visible area).

As shown in FIG. 3, the barrier portion 6 has a plurality of light-shielding regions 61 that block image light. The plurality of light-shielding regions 61 define a light-transmitting region 62 between the light-shielding regions 61 adjacent to each other. The light-transmitting region 62 has a higher light transmittance than the light-shielding region 61. In other words, the light-shielding region 61 has a lower light transmittance than the light-transmitting region 62.

The translucent region 62 is a portion that transmits light incident on the barrier portion 6. The light transmitting region 62 may transmit light with a transmittance of a first predetermined value or more. The first predetermined value may be, for example, a value of approximately 100% or a value of less than 100%. The value of the first predetermined value may be 100% or less as long as the image light emitted from the active area 51 is in a range where the image light can be clearly seen, and may be, for example, 80% or 50%. The light-shielding region 61 is a portion that blocks the light incident on the barrier portion 6 and hardly transmits it. In other words, the shading area 61 blocks the image displayed in the active area 51 of the display panel 5 from reaching the user's eyes. The light-shielding region 61 may block light with a transmittance of a second predetermined value or less. The second predetermined value may be, for example, a value of approximately 0% or a value larger than 0%. The second predetermined value may be a value close to 0% such as 0.5%, 1% or 3%. The first predetermined value may be several times or more, for example, 10 times or more larger than the second predetermined value.

The translucent region 62 and the light-shielding region 61 extend in a predetermined direction along the active area 51, and are repeatedly and alternately arranged in a direction orthogonal to the predetermined direction. The translucent region 62 defines the light ray direction of the image light emitted from the subpixel.

As shown in FIG. 1, the barrier pitch Bp, which is the horizontal arrangement interval of the translucent region 62, and the gap g between the active area 51 and the barrier portion 6 are the appropriate viewing distance d and the standard distance E0. It is specified that the following equations (1) and (2) hold.

E0: d = (n × Hp): g ... (1)

d: Bp = (d + g): (2 × n × Hp)… (2)

The suitable viewing distance d is a distance between each of the user's right eye and left eye and the barrier portion 6 such that the horizontal length of the visible region 51a is equivalent to n subpixels. The direction of the straight line passing through the right eye and the left eye (inter-eye direction) is the horizontal direction. The standard distance E0 is the standard of the user's inter-eye distance E. The standard distance E0 may be, for example, 61.1 mm to 64.4 mm, which is a value calculated by research by the National Institute of Advanced Industrial Science and Technology. Hp is the horizontal length of the subpixel as shown in FIG.

The barrier portion 6 may be composed of a film or a plate-shaped member having a transmittance of less than the second predetermined value. In this case, the light-shielding region 61 is composed of the film or plate-shaped member. The translucent region 62 is composed of openings provided in the film or plate-like member. The film may be made of resin or may be made of other materials. The plate-shaped member may be made of resin, metal, or the like, or may be made of other materials. The barrier portion 6 is not limited to the film or plate-shaped member, and may be composed of other types of members. In the barrier portion 6, the base material may have a light-shielding property, or the base material may contain an additive having a light-shielding property.

The barrier portion 6 may be configured by a liquid crystal shutter. The liquid crystal shutter can control the light transmittance according to the applied voltage. The liquid crystal shutter is composed of a plurality of pixels, and the transmittance of light in each pixel may be controlled. The liquid crystal shutter can form a region having a high light transmittance or a region having a low light transmittance into an arbitrary shape. When the barrier portion 6 is composed of a liquid crystal shutter, the translucent region 62 may be a region having a transmittance of a first predetermined value or more. When the barrier portion 6 is composed of a liquid crystal shutter, the light-shielding region 61 may be a region having a transmittance of a second predetermined value or less.

By being configured as described above, the barrier unit 6 can allow the image light emitted from a part of the subpixels of the active area 51 to pass through the translucent region 62 and propagate to the user's right eye. The barrier unit 6 can allow the image light emitted from some of the other sub-pixels to pass through the translucent region 62 and propagate to the left eye of the user.

(Parallax image)
The image visually recognized by the user will be described in detail with reference to FIGS. 4 and 5. As described above, the left visible region 51aL shown in FIG. 4 is visually recognized by the user's left eye 15L when the image light that has passed through the translucent region 62 of the barrier portion 6 reaches the user's left eye 15L. It is an area on the active area 51. The left invisible region 51bL is an region that cannot be visually recognized by the user's left eye 15L because the image light is blocked by the light-shielding region 61 of the barrier portion 6. The left visible region 51aL includes half of subpixel P1, the whole of subpixels P2 to P6, and half of subpixel P7.

The right visible region 51aR shown in FIG. 5 is the user's right eye when the image light from some other subpixels transmitted through the translucent region 62 of the barrier portion 6 reaches the user's right eye 15R. It is an area on the active area 51 visually recognized by the 15R. The right invisible region 51bR is a region that cannot be visually recognized by the user's right eye 15R because the image light is blocked by the light-shielding region 61 of the barrier portion 6. The right visible region 51aR includes half of subpixel P7, the whole of subpixels P8 to P12, and half of subpixel P1.

When the left eye image is displayed on the sub-pixels P1 to P6 and the right eye image is displayed on the sub-pixels P7 to P12, the left eye 15L and the right eye 15R visually recognize the left eye image and the right eye image, respectively. The left eye image and the right eye image are parallax images having parallax with each other. Specifically, the left eye 15L is half of the left eye image displayed on the subpixel P1, the entire left eye image displayed on the subpixels P2 to P6, and the right eye image displayed on the subpixel P7. Visualize half of. The right eye 15R visually recognizes half of the right eye image displayed on the subpixel P7, the entire right eye image displayed on the subpixels P8 to P12, and half of the left eye image displayed on the subpixel P1. do. In FIGS. 4 and 5, the subpixels displaying the left-eye image are designated by the reference numeral “L”, and the subpixels displaying the right-eye image are designated by the reference numeral “R”.

In this state, the area of the left eye image visually recognized by the user's left eye 15L is the maximum, and the area of the right eye image is the minimum. The area of the right eye image visually recognized by the user's right eye 15R is the maximum, and the area of the left eye image is the minimum. Therefore, the user visually recognizes the three-dimensional image in the state where the crosstalk is most reduced.

In the three-dimensional display device 1 configured as described above, when the left eye image and the right eye image having a difference in distance from each other are displayed in the subpixels included in the left visible region 51aL and the right visible region 51aR, the eye. A user whose distance E is a standard distance E0 can appropriately visually recognize a three-dimensional image. In the above configuration, the left eye image is displayed in the subpixel in which more than half is visually recognized by the left eye 15L, and the right eye image is displayed in the subpixel in which more than half is visually recognized by the right eye 15R. Not limited to this, the subpixels that display the left eye image and the right eye image are the left visible area 51aL and the right visible area 51aR so that the crosstalk is minimized according to the design of the active area 51, the barrier portion 6, and the like. It may be determined as appropriate based on. For example, the left eye image is displayed on a subpixel in which a predetermined ratio or more is visually recognized by the left eye 15L according to the aperture ratio of the barrier portion 6, and the right eye is displayed on the subpixel in which a predetermined ratio or more is visually recognized by the right eye 15R. The image may be displayed.

(Structure of control unit)
The control unit 7 is connected to each component of the three-dimensional display device 1 and can control each component. The components controlled by the control unit 7 may include a detection unit 2, a display panel 5, and a drive unit 11. The three-dimensional display device 1 may include a control unit that controls the detection unit 2 in addition to the control unit 7 that controls the display panel 5 and the drive unit 11. The control unit 7 is configured as, for example, a processor. The control unit 7 may include one or more processors. The processor may include a general-purpose processor that reads a specific program and performs a specific function, and a dedicated processor specialized for a specific process. The dedicated processor may include an application specific integrated circuit (ASIC). The processor may include, for example, a Programmable Logic Device (PLD). The programmable logic device may include an FPGA (Field-Programmable Gate Array). The control unit 7 may be either a SoC (System-on a-Chip) in which one or a plurality of processors cooperate, or a SiP (System In a Package). The control unit 7 includes a memory 8, and may store various information, a program for operating each component of the three-dimensional display device 1, and the like in the memory 8. The memory 8 may be configured by, for example, a semiconductor memory or the like. The memory 8 may function as a work memory of the control unit 7. The memory 8 is composed of an arbitrary storage device such as a RAM (Random Access Memory) and a ROM (Read Only Memory). The memory 8 may store the first table described later.

(Index adjustment)
As shown in FIG. 6, the positions of the right eye 15R and the left eye 15L in the horizontal direction are identified by information 0 to 11, respectively. The information for identifying the position of the right eye 15R when the inter-eye distance E is the standard distance E0 is attached in the same manner as the information for identifying the position of the left eye 15L.

As shown in FIG. 7, in the first table, the positions of the left eye 15L and the right eye 15R when the intereye distance E is the standard distance E0, and a predetermined ratio or more in each of the left visible region 51aL and the right visible region 51aR. The left subpixel and the right subpixel containing are stored correspondingly. In the example shown in FIG. 7, the information 0 to 11 for identifying the position of the eye 15 is shown in the column direction, and the information P1 to P12 for identifying the subpixel is shown in the row direction. The information that identifies the position of the eye 15 is referred to as an index or reference index. The first table shows whether each subpixel is a left subpixel or a right subpixel when the eye 15 is in each position. In FIG. 7, the left subpixel is indicated by "left" and the right subpixel is indicated by "right". As described with reference to FIG. 6, when the intereye distance E is the standard distance E0, when the left eye 15L is in the position indicated by “0”, the right eye 15R is in the position indicated by “0”. In this case, in the example shown in FIG. 7, it is shown that the subpixels P1 to P6 are the left subpixels and the subpixels P7 to P12 are the right subpixels. When the left eye 15L is in the position indicated by "1", the right eye 15R is in the position indicated by "1". In this case, it is shown that the subpixels P2 to P7 are the left subpixels, and P1 and P8 to P12 are the right subpixels. The control unit 7 selects any of the indexes 0 to 11. The control unit 7 defines the arrangement of the left-eye image and the right-eye image to be displayed on the display surface of the display panel 5 based on the information P1 to P12 that identify the subpixels corresponding to the selected index.

The control unit 7 has a first image and a second image based on the position of the left eye 15L or the position of the right eye 15R detected by the detection unit 2 or the position acquisition unit 3, and the index stored in the first table. And are combined to generate a parallax image. The control unit 7 may adjust the arrangement of the first image and the second image displayed on the display surface of the display panel 5 based on the position of the left eye 15L or the position of the right eye 15R and the index. As a result, the user whose inter-eye distance E is the standard distance E0 can appropriately visually recognize the three-dimensional image.

The position of the user's eyes 15 can move in the first direction (horizontal direction). When the control unit 7 fixes the index to any of the indexes 0 to 11 stored in the first table and generates a parallax image based on the fixed index, it crosses the three-dimensional image visually recognized by the user. Talk may occur.

The three-dimensional display device 1 of the present embodiment is configured such that the control unit 7 adjusts the index. When adjusting the index, the control unit 7 generates a parallax image for index adjustment and displays the generated parallax image for index adjustment on the display panel. The parallax image for index adjustment is also referred to as a reference image.

The reference image is an image obtained by synthesizing a first image and a second image that are different from each other. The first image and the second image constituting the reference image may be monochromatic images having different colors from each other. One of the first image and the second image constituting the reference image may be a black image and the other (second image) may be a white image. In this case, the reference image is a striped image in which white regions and black regions are alternately and periodically arranged, as shown in FIG. The reference image may be a visible light image or an infrared light image. The visible light image may be a black-and-white striped image or a color striped image. The infrared light image may be a fringe image obtained by synthesizing a first image and a second image having different wavelengths of image light.

The control unit 7 synthesizes a first image and a second image different from each other based on a predetermined index to generate a reference image. The predetermined index may be any of indexes 0 to 11 stored in the first table. The reference image may be a composite image assuming that the right eye 15R is in the position indicated by "0" in the first table, and both the left eye 15L and the right eye 15R are "0" in the first table. The image may be a composite image assuming that it is in the position indicated by. The reference image generated based on the predetermined index is also referred to as the first reference image 14. The control unit 7 displays the generated first reference image 14 on the display panel 5. FIG. 8 shows an example of the reference image displayed on the display panel 5 viewed from the depth direction. The first reference image 14 displayed on the display panel 5 is propagated to the user's left eye 15L and right eye 15R via the barrier portion 6 and the optical element. The first reference image 14 is projected on the user's face.

The control unit 7 controls the detection unit 2 to capture the face of the user on which the first reference image 14 is projected. FIG. 9 is a diagram showing an example of an image captured by the detection unit 2. Hereinafter, the image captured by the detection unit 2 is also referred to as the first detection image 12. FIG. 9 shows an example of the first detected image 12 when the first reference image 14 shown in FIG. 8 is used. As shown in FIG. 9, the first detected image 12 includes the user's left eye 15L and right eye 15R, and the first reference image 14 projected on the user's face. The first reference image 14 projected on the user's face can form a striped pattern in the first detected image 12, for example, as shown in FIG. The striped pattern is also referred to as a shading pattern.

Hereinafter, the index adjustment performed by the three-dimensional display device 1 based on the first detected image 12 will be described. The detection unit 2 detects at least one of the position of the left eye 15L and the position of the right eye 15R, and the position of the shading pattern. In the following, it is assumed that the detection unit 2 detects the position of the right eye 15R. The position of the shading pattern may be the luminance value distribution of the shading pattern. The shading pattern includes a high-luminance region 12a and a low-luminance region 12b. The high-luminance region 12a is a band-shaped region where the brightness in the shade pattern is bright, and the low-luminance region 12b is a band-shaped region where the brightness in the shade pattern is dark.

When the first reference image 14 is generated based on an appropriate index according to the position of the user's eye 15, the high-luminance region 12a and the right eye 15R overlap in the first detection image 12. The fact that the high-luminance region 12a and the right eye 15R do not overlap means that the index used to generate the first reference image 14 is not an appropriate index according to the actual position of the user's eye 15. ..

The control unit 7 adjusts the index based on the first detected image 12. In the following, it is assumed that the index used to generate the first reference image 14 is “0”.

The control unit 7 detects the deviation amount Dd between the position of the right eye 15R and the position of the high-luminance region 12a in the first direction (horizontal direction) as the deviation amount of the index. The position of the high-luminance region 12a may be a position within the high-luminance region 12a where the luminance value is highest in the first direction. For example, when the deviation amount Dd between the position of the right eye 15R and the position of the high-luminance region 12a in the first direction is three subpixels, the deviation amount of the index is “+3”, and the control unit 7 sets the index. Change from "0" to "3". When the amount of deviation Dd between the position of the right eye 15R and the position of the high-luminance region 12a in the first direction is six subpixels, the amount of change in the index is "+6", and the control unit 7 sets the index to "0". To "6". In this way, the control unit 7 can adjust the index based on the image of the user's face on which the first reference image 14 is projected.

According to the three-dimensional display device 1, since the index adjustment is performed based on the image of the user's face on which the first reference image 14 is projected, the adjustment excluding the user's subjective judgment is performed. It can be carried out. Therefore, the three-dimensional display device 1 can appropriately make the user visually recognize the three-dimensional image.

The three-dimensional display device 1 does not require the user's judgment in adjusting the index. Therefore, according to the three-dimensional display device 1, the index adjustment can be repeated a plurality of times without causing the user to feel annoyed, and the index adjustment accuracy can be improved.

The control unit 7 may adjust the index based on the amount of deviation between the position of the left eye 15L and the position of the low-luminance region 12b in the first direction. As a result, even when it is difficult to discriminate the high-luminance region 12a in the shading pattern due to the influence of light coming from the outside, etc., based on the image of the user's face on which the first reference image 14 is projected. , The index can be adjusted.

When the control unit 7 determines that it is difficult to discriminate the high-luminance region 12a in the shading pattern, the control unit 7 may generate a reference image in which the left eye image which is a white image and the right eye image which is a black image are combined. A reference image obtained by synthesizing a left eye image which is a white image and a right eye image which is a black image is also referred to as an inversion reference image. The control unit 7 may adjust the index based on the image of the face of the user who is visually recognizing the inversion reference image captured by the detection unit 2. The control unit 7 may adjust the index based on the amount of deviation between the position of the right eye 15R and the position of the low-luminance region of the shading pattern included in the inversion reference image projected on the user's face. As a result, even when it is difficult to discriminate the high-luminance region 12a of the shading pattern due to the influence of light coming from the outside, the index is based on the image of the user's face on which the inversion reference image is projected. Can be adjusted.

The three-dimensional display device 1 may be configured to adjust the index at night. As a result, it is possible to reduce the possibility that the position of the user's eye 15 or the first reference image 14 projected on the user's face becomes difficult to detect due to the influence of light coming from the outside. The night may be, for example, a time zone from sunset to sunrise. At night, the surrounding brightness may be dark regardless of the time of day.

The three-dimensional display device 1 may be configured to readjust the index after adjusting the index as described above. When the index is readjusted, the control unit 7 synthesizes a first image and a second image different from each other based on the adjusted index to generate a second reference image. The control unit 7 displays the second reference image on the display panel 5. The second reference image displayed on the display panel 5 is propagated to the user's left eye 15L and right eye 15R via the barrier unit 6, the optical element, and the like. The second reference image is projected on the user's face. The control unit 7 controls the detection unit 2 to capture the face of the user on which the second reference image is projected. The image of the user's face on which the second reference image is projected, which is captured by the detection unit 2, is the same as that of the first detection image 12 shown in FIG. 9, but the position and shading pattern of the user's eyes 15 The position of may be different from that of the first detection image 12 shown in FIG. Since the process performed by the three-dimensional display device 1 for readjusting the index is the same as the process performed for adjusting the index, detailed description thereof will be omitted.

Since the three-dimensional display device 1 readjusts the index, the accuracy of index adjustment can be improved. Therefore, the three-dimensional display device 1 can appropriately make the user visually recognize the three-dimensional image. According to the three-dimensional display device 1, the index adjustment can be repeated a plurality of times, and the index adjustment accuracy can be improved.

The three-dimensional display device 1 may display the reference image only when the index is being adjusted. When the index is not adjusted, the three-dimensional display device 1 may display various information about a moving body such as a vehicle, a ship, or an aircraft equipped with the three-dimensional display device 1. The three-dimensional display device 1 may display a reference image between frames of continuous images showing various information, and have the detection unit 2 capture the face of the user on which the reference image is projected. As a result, the three-dimensional display device 1 can repeatedly adjust the index while displaying various information about the moving body. As a result, the three-dimensional display device 1 can always use an appropriate index according to the position of the user's eye 15, so that the user can appropriately visually recognize the three-dimensional image.

In the three-dimensional display device 1, the detection unit 2 detects at least one of the position of the left eye 15L and the position of the right eye 15R and the position of the shading pattern, but the detection unit 2 detects the position of the left eye 15L and the right. It is not necessary to detect at least one of the positions of the eye 15R and the position of the shading pattern. In this case, the three-dimensional display device 1 may be configured such that the position acquisition unit 3 detects at least one of the position of the left eye 15L and the position of the right eye 15R and the position of the shading pattern.

The display panel 5 may have a plurality of display areas having different indexes in the active area 51. The control unit 7 may adjust the index of the display area located in the central portion of the active area 51 as described above, and adjust the index of another display area in synchronization with the index of the display area.

The three-dimensional display device 1 may be configured to correct the first detected image 12 and adjust the index based on the corrected first detected image 12. The correction of the first detected image 12 may be performed based on the reflectance of the user's face. Hereinafter, the correction of the first detected image 12 and the adjustment of the index using the corrected first detected image 12 will be described.

The control unit 7 causes the display panel 5 to display the test image at a time point before the first reference image 14 is displayed on the display panel 5. The test image may be a monochromatic image. The monochromatic image may be a white image. The test image may be generated, for example, by synthesizing a white first image and a white second image. The control unit 7 may display the test image on the display panel 5 before generating the first reference image 14, or may display the test image on the display panel 5 after generating the first reference image 14.

The control unit 7 causes the detection unit 2 to capture an image of the user's face on which the test image is projected. The detection unit 2 measures the reflectance of the user's face based on the reflectance measurement image (hereinafter, also simply referred to as a measurement image) obtained by imaging. The reflectance of the user's face can be measured for each pixel of the measurement image based on the luminance value of the test image displayed on the display panel 5 and the luminance value of each pixel of the measurement image. The detection unit 2 detects at least one of the position of the left eye 15L and the position of the right eye 15R based on the measurement image. In the following, it is assumed that the detection unit 2 detects the position of the right eye 15R.

The control unit 7 causes the display panel 5 to display the first reference image 14 after the detection unit 2 detects the reflectance of the user's face and the position of the right eye 15R. The control unit 7 causes the detection unit 2 to image the face of the user on which the first reference image 14 is projected, and obtains the first detection image 12. The control unit 7 corrects the first detected image 12 by dividing the luminance value of each pixel in the first detected image 12 by the reflectance of the pixel measured from the measurement image.

The corrected first detection image 12 is an image in which the influence of the reflectance of the user's face is reduced. The corrected first detection image 12 may be an image that does not substantially include the user's face and contains only the shading pattern. The detection unit 2 detects the position of the high-luminance region 12a of the shading pattern based on the corrected first detection image 12. Since the corrected second detection image 13 is an image in which the influence of the reflectance of the user's face is reduced, the position of the high-luminance region 12a is detected from the corrected second detection image 13 to obtain high brightness. The position of the region 12a can be detected with high accuracy.

In order to adjust the index, it is determined how many sub-pixels the deviation amount Dd between the position of the right eye 15R and the position of the high-luminance region 12a in the first direction (x-axis direction) corresponds to. There is a need. Since the position of the right eye 15R and the position of the high-luminance region 12a are represented by the coordinates with respect to the origin of the camera included in the detection unit 2, in order to make the above determination, first, the coordinates of the right eye 15R and the position are expressed. It is necessary to convert the coordinates of the high-luminance region 12a into the coordinates with respect to the origin of the display panel 5. The coordinate transformation is also referred to as origin correction. FIG. 10 is a diagram for explaining origin correction. The origin O5 of the display panel 5 is located in the high luminance region 12a. It is assumed that the origin O2 of the camera is at the position shown in FIG. The control unit 7 converts the coordinates of the right eye 15R with respect to the origin O2 and the coordinates of the high-luminance region 12a (collectively referred to as “x”) into the coordinates x + xd-xe with respect to the origin O5. Here, xd is the distance between the right eye 15R and the high-luminance region 12a in the x-axis direction, and xe is the x-coordinate of the right eye 15R with respect to the origin O2. The control unit 7 determines how many sub-pixels the deviation amount Dd corresponds to by using the above-mentioned origin correction, and adjusts the index based on the determination.

According to the three-dimensional display device 1 having the above configuration, the position of the right eye 15R is detected from the measurement image, and the position of the high-luminance region 12a is detected from the corrected first detection image 12. And the position of the high-luminance region 12a can be detected accurately. As a result, the index can be adjusted accurately.

The control unit 7 may detect the position of the left eye 15L based on the measurement image. The control unit 7 calculates an index based on the amount of deviation between the position of the left eye 15L detected from the measurement image and the position of the low-luminance region 12b detected from the corrected first detection image 12 in the first direction. You may adjust.

The control unit 7 may display the inversion reference image on the display panel 5 instead of the first reference image 14. The control unit 7 may have the detection unit 2 capture an image of the user's face on which the inversion reference image is projected to obtain a detection image. The control unit 7 may correct the detected image using the reflectance of the user's face, and detect the position of the right eye and the position of the low-luminance region based on the corrected detected image. The control unit 7 may adjust the index based on the amount of deviation between the position of the right eye and the position of the low-luminance region in the first direction. As a result, even when it is difficult to discriminate the high-luminance region of the shading pattern due to the influence of light coming from the outside, the index is indexed based on the image of the user's face on which the inversion reference image is projected. Can be adjusted.

When the control unit 7 displays the test image on the display panel 5 before generating the first reference image 14, at least one color of the first image and the second image or based on the reflectance of the user's face You may change the brightness. This makes it possible to accurately detect the position of the eye 15 and the shading pattern.

FIG. 11 is a flowchart illustrating an example of a process for adjusting the index. When the control unit 7 starts this flowchart, in step S1, the test image is displayed on the display panel 5, and the detection unit 2 is made to capture an image of the user's face (measurement image) on which the test image is projected. .. In step S2, the control unit 7 detects the position of the right eye 15R based on the measurement image. In step S3, the control unit 7 measures the reflectance of the user's face based on the measurement image. In step S4, the control unit 7 displays the first reference image 14 on the display panel 5, and causes the detection unit 2 to display the image of the user's face (first detection image 12) on which the first reference image 14 is projected. Have an image taken. In step S5, the control unit 7 corrects the first detected image 12 by using the reflectance of the user's face, and obtains the corrected first detected image 12. In step S6, the control unit 7 detects the position of the high-luminance region 12a based on the corrected first detection image 12. In step S7, the control unit 7 corrects the origin based on the position of the right eye 15R detected in step S2 and the position of the high-luminance region 12a detected in step S6. In step S8, the control unit 7 adjusts the index based on the deviation amount Dd with respect to the origin O5 of the display panel 5, and ends this flowchart.

When the index is readjusted, the three-dimensional display device 1 uses the reflectance of the user's face to capture the image of the user's face captured by the detection unit 2 on which the second reference image is projected. It may be corrected and the index may be readjusted based on the corrected image.

(Correction of inter-eye distance)
When the inter-eye distance E1 of the user is different from the standard distance E0, for example, as shown in FIG. 12, there is a binocular visible region 51aLR in which a part of the left visible region 51aL overlaps with a part of the right visible region 51aR. There is. Therefore, it is determined that the left subpixel (first subpixel) that is determined to display the left eye image based on the left visible region 51aL and that the right eye image should be displayed based on the right visible region 51aR. There may be subpixels that are the right subpixel (second subpixel). The left subpixel is, for example, a subpixel in which a predetermined ratio (for example, half) or more is included in the left visible region 51aL. The right subpixel is, for example, a subpixel in which a predetermined ratio or more is included in the right visible region 51aR.

When the right eye image is displayed in the subpixel which is the left subpixel and is the right pixel, the right eye image visually recognized by the left eye 15L increases. When the left eye image is displayed in the subpixel which is the left subpixel and is the right pixel, the left eye image visually recognized by the right eye 15R increases. Therefore, crosstalk may increase regardless of whether the left-eye image or the right-eye image is displayed on the overlapping subpixels. The control unit 7 causes a cross talk generated when a user having an intereye distance E1 different from the standard distance E0 visually recognizes a three-dimensional image displayed by the three-dimensional display device 1 configured based on the standard distance E0. In order to reduce the distance, the distance between the eyes may be corrected.

When correcting the interocular distance, the control unit 7 generates a parallax image for correcting the interocular distance and displays the generated parallax image on the display panel. The parallax image for interocular distance correction may be a first reference image 14 synthesized based on a predetermined index, or may be a second reference image synthesized based on the adjusted index. The parallax image for interocular distance correction may be an image different from the first reference image and the second reference image. In the following, it is assumed that the parallax image for correcting the interocular distance is the first reference image 14.

The control unit 7 displays the first reference image 14 on the display panel 5. The first reference image 14 displayed on the display panel 5 is propagated to the user's left eye 15L and right eye 15R via the barrier portion 6 and the optical element. The first reference image 14 is projected on the user's face.

The control unit 7 controls the detection unit 2 to capture the face of the user on which the first reference image 14 is projected. FIG. 13 is a diagram showing an example of an image captured by the detection unit 2. The image captured by the detection unit 2 is also referred to as a second detection image 13. As shown in FIG. 13, the second detected image 13 includes the user's left eye 15L and right eye 15R, and the first reference image 14 projected on the user's face. The first reference image 14 projected on the user's face can form a striped pattern in the second detected image 13, for example, as shown in FIG. The striped pattern is also referred to as a shading pattern.

Hereinafter, the correction of the intereye distance performed by the three-dimensional display device 1 based on the second detected image 13 will be described. The detection unit 2 detects the position of the left eye 15L, the position of the right eye 15R, and the position of the shading pattern. The position of the shading pattern may be the luminance value distribution of the shading pattern. The shading pattern includes a high-luminance region 13a and a low-luminance region 13b. The high-luminance region 13a is a band-shaped region where the brightness in the shading pattern is bright, and the low-luminance region 13b is a band-shaped region where the brightness in the shading pattern is dark.

The three-dimensional display device 1 in which the inter-eye distance correction is not performed is configured based on the standard distance E0. Therefore, when the inter-eye distance E1 of the user is the standard distance E0, the distance between the high brightness region 13a and the low brightness region 13b in the first direction (horizontal direction) is the left eye 15L and the right eye 15R in the horizontal direction. Is equal to the distance of. In other words, when the inter-eye distance E1 of the user is the standard distance E0, the horizontal distance between the adjacent high-brightness regions 13a is twice the distance between the first eye 15L and the second eye 15R in the horizontal direction. become. The horizontal distance between adjacent high-luminance regions 13a is also referred to as the horizontal distance Dh. The distance between the first eye 15L and the second eye 15R in the horizontal direction is also referred to as the horizontal distance De. The horizontal distance Dh can be calculated based on the position of the high-luminance region 12a. The horizontal distance De can be calculated based on the position of the left eye 15L and the position of the right eye 15R. When the horizontal distance Dh is larger than twice the horizontal distance De, it can be determined that the inter-eye distance E1 of the user is smaller than the standard distance E0. When the horizontal distance Dh is smaller than twice the horizontal distance De, it can be determined that the inter-eye distance E1 of the user is larger than the standard distance E0.

The control unit 7 controls the drive unit 11 based on the horizontal distance Dh and the horizontal distance De, and moves the barrier unit 6 in the third direction. When the control unit 7 determines that the inter-eye distance E1 of the user is larger than the standard distance E0, the control unit 7 moves the barrier unit 6 along the third direction, for example, as shown in FIG. 14, and the barrier unit 6 and the active area. Reduce the distance to 51. As a result, the image light emitted from the subpixel included in the left visible region 51aL is propagated to the left eye of the user whose intereye distance E1 is larger than the standard distance E0, and is emitted from the subpixel included in the right visible region 51aR. The resulting image light can be propagated to the right eye of the user whose intereye distance E1 is larger than the standard distance E0.

When the control unit 7 determines that the inter-eye distance E1 of the user is smaller than the standard distance E0, the control unit 7 moves the barrier unit 6 along the third direction to increase the distance between the barrier unit 6 and the active area 51. As a result, the image light emitted from the subpixel included in the left visible region 51aL is propagated to the left eye 15L of the user whose eye distance E1 is smaller than the standard distance, and is emitted from the subpixel included in the right visible region 51aR. The resulting image light can be propagated to the right eye 15R of the user whose intereye distance E1 is smaller than the standard distance E0.

According to the three-dimensional display device 1, since the correction of the inter-eye distance is performed based on the image of the user's face on which the first reference image is projected, the correction excluding the subjective judgment of the user. It can be performed. Therefore, the three-dimensional display device 1 can appropriately make the user visually recognize the three-dimensional image.

The memory 8 may store a table for interocular distance correction in which the relationship between the ratio of the horizontal distance Dh and the horizontal distance De and the amount of movement of the barrier portion 6 in the third direction is defined. The control unit 7 may control the drive unit 11 by using the interocular distance correction table stored in the memory 8.

The three-dimensional display device 1 does not require the user's judgment in correcting the intereye distance. Therefore, according to the three-dimensional display device 1, it is possible to repeat the correction of the inter-eye distance a plurality of times without causing the user to feel annoyed, and it is possible to improve the correction accuracy of the inter-eye distance.

The three-dimensional display device 1 may be configured to correct the second detected image 13 and correct the intereye distance based on the corrected second detected image 13. The correction of the second detected image 13 may be performed based on the reflectance of the user's face. Hereinafter, the correction of the second detected image 13 and the correction of the interocular distance using the corrected second detected image 13 will be described.

The control unit 7 causes the display panel 5 to display the test image at a time point before the first reference image 14 is displayed on the display panel 5. The test image may be a monochromatic image. The monochromatic image may be a white image. The test image may be generated, for example, by synthesizing a white first image and a white second image. The control unit 7 may display the test image on the display panel 5 before generating the first reference image 14, or may display the test image on the display panel 5 after generating the first reference image 14.

The control unit 7 has the detection unit 2 capture an image of the user's face on which the test image is projected to obtain an image for measurement. The control unit 7 measures the reflectance of the user's face based on the measurement image, and detects the position of the left eye 15L and the position of the right eye 15R. The reflectance of the user's face can be measured for each pixel of the measurement image based on the luminance value of the test image displayed on the display panel 5 and the luminance value of each pixel of the measurement image. The control unit 7 may store the reflectance measured when the index is adjusted in the memory 8 and use the reflectance read from the memory 8, or may use the reflectance when correcting the interocular distance. The rate may be measured again. The control unit 7 calculates the horizontal distance De based on the position of the left eye 15L and the position of the right eye 15R.

The control unit 7 causes the display panel 5 to display the first reference image 14. The control unit 7 causes the detection unit 2 to image the face of the user on which the first reference image 14 is projected, and obtains the second detection image 13. The control unit 7 corrects the second detected image 13 by dividing the luminance value of each pixel in the second detected image 13 by the reflectance of the pixel measured from the measurement image. The control unit 7 detects the position of the high-luminance region 12a based on the corrected second detection image 13, and calculates the horizontal distance Dh based on the position of the high-luminance region 12a. Since the subsequent processing is the same as the case where the interocular distance is corrected by using the second detected image 13 which is not corrected, detailed description thereof will be omitted. In the corrected second detection image 13, the influence of the reflectance of the user's face is reduced, so that the shading pattern can be easily detected. Therefore, by using the corrected second detection image 13, it is possible to accurately correct the inter-eye distance.

When the control unit 7 determines that it is difficult to discriminate the low-luminance region 13b in the shading pattern, the distance between adjacent high-luminance regions 13a in the horizontal direction may be set as the horizontal distance Dh. As a result, even when it is difficult to discriminate the low-luminance region 13b in the shading pattern due to the influence of light coming from the outside, etc., based on the image of the user's face on which the first reference image is projected, The distance between the eyes can be corrected.

When the control unit 7 determines that it is difficult to discriminate the low-luminance region 13b in the shading pattern, the control unit 7 may generate a reference image in which the left eye image which is a white image and the right eye image which is a black image are combined. A reference image obtained by synthesizing a left eye image which is a white image and a right eye image which is a black image is also referred to as an inversion reference image. The control unit 7 may correct the intereye distance based on the image of the face of the user who is visually recognizing the inversion reference image captured by the detection unit 2. The control unit 7 may correct the inter-eye distance based on the distance between adjacent high-luminance regions in the horizontal direction and the horizontal distance De. As a result, even when it is difficult to discriminate the low-luminance region 13b of the shading pattern due to the influence of light coming from the outside, the eyes are based on the image of the user's face on which the inversion reference image is projected. The distance can be corrected.

The three-dimensional display device 1 may be configured to correct the intereye distance at night. As a result, it is possible to reduce the possibility that the position of the user's eye 15 or the first reference image 14 projected on the user's face becomes difficult to detect due to the influence of light coming from the outside. The night may be, for example, a time zone from sunset to sunrise. At night, the surrounding brightness may be dark regardless of the time of day.

The three-dimensional display device 1 may be configured to correct the inter-eye distance and then re-correct the inter-eye distance as described above. When re-correcting the inter-eye distance, the control unit 7 synthesizes a first image and a second image different from each other to generate a parallax image for re-correcting the inter-eye distance. The control unit 7 displays the generated parallax image on the display panel. The parallax image for re-correcting the interocular distance may be a first reference image, a second reference image, or an image different from the first reference image and the second reference image. In the following, it is assumed that the parallax image for re-correcting the interocular distance is the second reference image.

The second reference image displayed on the display panel 5 is propagated to the left eye and the right eye of the user via the barrier unit 6, the optical element, and the like. The second reference image is projected on the user's face. The control unit 7 controls the detection unit 2 to capture the face of the user on which the second reference image is projected. The image of the user's face on which the second reference image is projected, which is captured by the detection unit 2, is the same as that of the second detection image 13 shown in FIG. 13, but the position and shading pattern of the user's eyes 15 The position of may be different from the second detection image 13 shown in FIG. Since the process performed by the three-dimensional display device 1 for re-correcting the inter-eye distance is the same as the above-mentioned process performed for correcting the inter-eye distance, detailed description thereof will be omitted.

Since the three-dimensional display device 1 re-corrects the inter-eye distance, the accuracy of correcting the inter-eye distance can be improved. Therefore, the three-dimensional display device 1 can appropriately make the user visually recognize the three-dimensional image. According to the three-dimensional display device 1, the correction of the inter-eye distance can be repeated a plurality of times, and the correction accuracy of the inter-eye distance can be improved.

The three-dimensional display device 1 may display the reference image only when the distance between the eyes is corrected. When the inter-eye distance is not corrected, the three-dimensional display device 1 may display various information about a moving body such as a vehicle, a ship, or an aircraft equipped with the three-dimensional display device 1. The three-dimensional display device 1 may display a reference image between frames of continuous images showing various information, and have the detection unit 2 capture the face of the user on which the reference image is projected. As a result, the three-dimensional display device 1 can repeatedly correct the inter-eye distance while displaying various information about the moving body. As a result, the three-dimensional display device 1 can always display a three-dimensional image according to the distance between the eyes of the user, so that the user can appropriately visually recognize the three-dimensional image.

In the three-dimensional display device 1, the detection unit 2 detects the position of the eye 15 and the position of the shading pattern, but the detection unit 2 does not have to detect the position of the eye 15 and the position of the shading pattern. In this case, the three-dimensional display device 1 may be configured such that the control unit 7 detects the position of the eye 15 and the position of the shading pattern, and the position acquisition unit 3 may detect the position of the eye 15 and the shading pattern. It may be configured to detect the position and output it to the control unit 7.

When the three-dimensional display device 1 re-corrects the inter-eye distance, the image of the user's face captured by the detection unit 2 on which the second reference image is projected is used to obtain the reflectance of the user's face. It may be corrected using and the interocular distance may be re-corrected based on the corrected image.

As shown in FIG. 15, the three-dimensional display device 1 can be mounted on the head-up display 100. The head-up display 100 is also referred to as a HUD (Head Up Display) 100. The HUD 100 includes a three-dimensional display device 1, an optical member 110, and a projected member 120 having a projected surface 130.

The HUD 100 causes the image light emitted from the three-dimensional display device 1 to reach the projected member 120 via the optical member 110. The HUD 100 causes the image light reflected by the projected member 120 to reach the first eye and the second eye of the user. In other words, the HUD 100 advances the image light from the three-dimensional display device 1 to the first eye and the second eye of the user along the optical path 140 shown by the broken line in FIG. The user can visually recognize the image light that has reached along the optical path 140 as a virtual image 150.

Since the index of the three-dimensional display device 1 is adjusted based on the image of the user's face on which the first reference image is projected, the HUD100 makes adjustments excluding the user's subjective judgment. be able to. Therefore, the HUD100 can appropriately make the user visually recognize the three-dimensional image. The HUD100 does not require user judgment to adjust the index. Therefore, according to the HUD 100, the index adjustment can be repeated a plurality of times without causing the user to feel annoyed, and the index adjustment accuracy can be improved.

As shown in FIG. 16, the HUD100 including the three-dimensional display device 1 may be mounted on a moving body 10 such as a vehicle, a ship, or an aircraft. The HUD 100 may use a part of the configuration as other devices and parts included in the moving body 10. For example, the moving body 10 may also use the windshield as the projected member 120. When a part of the configuration is also used as another device or component included in the moving body 10, the other configuration can be referred to as a HUD module or a three-dimensional display component. The HUD 100 may be mounted on the moving body 10.

Since the index of the three-dimensional display device 1 is adjusted based on the image of the user's face on which the first reference image is projected, the moving body 10 is adjusted excluding the subjective judgment of the user. It can be performed. Therefore, the moving body 10 can appropriately make the user visually recognize the three-dimensional image. The mobile body 10 does not require the user's judgment in adjusting the index. Therefore, according to the mobile body 10, the index adjustment can be repeated a plurality of times without causing the user to feel annoyed, and the index adjustment accuracy can be improved.

"Vehicles" in the present disclosure include, but are not limited to, automobiles and industrial vehicles, and may include railroad vehicles, domestic vehicles, and fixed-wing aircraft traveling on runways. Automobiles include, but are not limited to, passenger cars, trucks, buses, motorcycles, trolleybuses and the like, and may include other vehicles traveling on the road. Industrial vehicles include industrial vehicles for agriculture and construction. Industrial vehicles include, but are not limited to, forklifts and golf carts. Industrial vehicles for agriculture include, but are not limited to, tractors, cultivators, transplanters, binders, combines, and lawnmowers. Industrial vehicles for construction include, but are not limited to, bulldozers, scrapers, excavators, mobile cranes, dump trucks, and road rollers. Vehicles include those that run manually. The classification of vehicles is not limited to the above. For example, an automobile may include an industrial vehicle capable of traveling on a road, and the same vehicle may be included in a plurality of classifications. Vessels in the present disclosure include marine jets, boats and tankers. Aircraft in the present disclosure include fixed-wing aircraft and rotary-wing aircraft.

Although the embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above-described embodiments, and various changes, improvements, etc. may be made without departing from the gist of the present disclosure. It is possible. Needless to say, all or a part of each of the above-described embodiments can be combined as appropriate and within a consistent range.

In the present disclosure, the description of "first", "second" and the like is an identifier for distinguishing the configuration. The configurations distinguished by the descriptions such as "first" and "second" in the present disclosure can exchange numbers in the configurations. For example, the first eye can exchange the identifiers "first" and "second" with the second eye. The exchange of identifiers takes place at the same time. Even after exchanging identifiers, the configuration is distinguished. The identifier may be deleted. Configurations with the identifier removed are distinguished by a code. Based solely on the description of identifiers such as "1st" and "2nd" in the present disclosure, it shall not be used as an interpretation of the order of the configurations or as a basis for the existence of identifiers with smaller numbers.

In the present disclosure, the x-axis, y-axis, and z-axis are provided for convenience of explanation and may be interchanged with each other. The configuration according to the present disclosure has been described using a Cartesian coordinate system composed of x-axis, y-axis, and z-axis. The positional relationship of each configuration according to the present disclosure is not limited to being orthogonal.

1 3D display device 2 Detection unit 3 Position acquisition unit 4 Irradiator 5 Display panel 51 Active area 51a Visible area 51aL Left visible area 51aR Right visible area 51bL Left invisible area 51bR Right invisible area 51aLR Binocular visible area 6 Barrier part 61 Shading Area 62 Translucent area 7 Control unit 8 Memory 10 Mobile unit 11 Drive unit 12 First detection image 13 Second detection image 12a, 13a High brightness area 12b, 13b Low brightness area 14 Reference image (first reference image)
15 eyes 15L left eye 15R right eye 100 head-up display (HUD)
110 Optical member 120 Projected member 130 Projected surface 140 Optical path 150 Virtual image

Claims (14)

A display panel configured to display a parallax image including a first image and a second image having parallax with respect to the first image.
A barrier unit configured to give parallax to the first eye and the second eye of the user by defining the traveling direction of the image light of the parallax image.
A detection unit configured to capture the face of the user who is visually recognizing the parallax image, and a detection unit.
With a control unit,
The control unit
Based on a predetermined index that defines the arrangement of the first image and the second image displayed on the display panel, the first image and the second image that are different from each other are combined to generate a first reference image. ,
The first reference image is displayed on the display panel, and the first reference image is displayed on the display panel.
A three-dimensional display device that adjusts the index based on the image of the user's face captured by the detection unit on which the first reference image is projected. The three-dimensional display device according to claim 1.
The control unit is a three-dimensional display device that adjusts the position of the barrier unit in the traveling direction of the image light based on the image of the user's face on which the first reference image is projected. The three-dimensional display device according to claim 1 or 2.
The first image and the second image are monochromatic images different from each other, and are different from each other.
The control unit is attached to at least one of the position of the first eye and the position of the second eye of the user obtained from the image of the face of the user captured by the detection unit, and the face of the user. A three-dimensional display device that adjusts the index based on the projected shade pattern of the first reference image. The three-dimensional display device according to claim 3.
The control unit is projected onto the user's first eye position and second eye position obtained from the image of the user's face captured by the detection unit, and the user's face. A three-dimensional display device that adjusts the position of the barrier portion in the traveling direction of the image light based on the shading pattern of the first reference image. The three-dimensional display device according to any one of claims 1 to 4.
The control unit
Based on the adjusted index, the first image and the second image, which are different from each other, are combined to generate a second reference image.
The second reference image is displayed on the display panel, and the second reference image is displayed on the display panel.
A three-dimensional display device that readjusts the index based on the image of the user's face captured by the detection unit on which the second reference image is projected. The three-dimensional display device according to claim 5.
The control unit is a three-dimensional display device that readjusts the position of the barrier unit in the traveling direction of the image light based on the image of the user's face on which the second reference image is projected. The three-dimensional display device according to any one of claims 1 to 6.
The control unit is a three-dimensional display device that displays a monochromatic test image on the display panel before displaying the first reference image on the display panel. The three-dimensional display device according to claim 7.
The test image is a three-dimensional display device which is a white monochromatic image. The three-dimensional display device according to claim 7 or 8.
The control unit is a three-dimensional display device that causes the detection unit to capture an image of the user's face on which the test image is projected. The three-dimensional display device according to claim 9.
The control unit is a three-dimensional display device that measures the reflectance of the user's face based on the image of the user's face captured by the detection unit on which the test image is projected. The three-dimensional display device according to claim 10.
The control unit is a three-dimensional display device that corrects the image of the user's face captured by the detection unit on which the first reference image is projected based on the reflectance. The three-dimensional display device according to claim 11.
The control unit is a three-dimensional display device that adjusts the index based on the corrected image of the user's face. A display panel configured to display a parallax image including a first image and a second image having parallax with respect to the first image.
A barrier unit configured to give parallax to the first eye and the second eye of the user by defining the traveling direction of the image light of the parallax image.
An optical member configured to make the user visually recognize the image light emitted from the display panel as a virtual image.
A detection unit configured to capture the face of the user who is visually recognizing the parallax image, and a detection unit.
With a control unit,
The control unit
Based on the index that specifies the arrangement of the first image and the second image displayed on the display panel, the first image and the second image that are different from each other are combined to generate a first reference image.
The first reference image is displayed on the display panel, and the first reference image is displayed on the display panel.
A head-up display that adjusts the index based on the image of the user's face captured by the detection unit on which the first reference image is projected. A display panel configured to display a parallax image including a first image and a second image having parallax with respect to the first image.
A barrier unit configured to give parallax to the first eye and the second eye of the user by defining the traveling direction of the image light of the parallax image.
An optical member configured to make the user visually recognize the image light emitted from the display panel as a virtual image.
A detection unit configured to capture the face of the user who is visually recognizing the parallax image, and a detection unit.
With a control unit,
The control unit
Based on the index that specifies the arrangement of the first image and the second image displayed on the display panel, the first image and the second image that are different from each other are combined to generate a first reference image.
The first reference image is displayed on the display panel, and the first reference image is displayed on the display panel.
A mobile body comprising a head-up display that adjusts the index based on the image of the user's face imaged by the detection unit on which the first reference image is projected.

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