# US 11,442,269 B2 · 3D display device, head-up display, moving body, and program

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- Number: US 11,442,269 B2
- Document ID: US11442269B2
- Status: Granted
- Kind: B2
- Application number: 17/284,945
- Filed: 2019-10-28
- Published: 2021-11-18
- Granted: 2022-09-13
- Earliest claimed: 2018-11-02
- Assignees: KYOCERA Corporation
- Applicants: KYOCERA Corporation
- Inventors: Kaoru Kusafuka; Sunao Hashimoto
- Web page: https://patentgrep.com/patent/US11442269B2

## CPC

- G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)}
- H04N 13/373: for tracking forward-backward translational head movements, i.e. longitudinal movements
- B60K 35/10: Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
- B60K 35/211: {producing three-dimensional [3D] effects, e.g. stereoscopic images}
- B60K 35/23: Head-up displays [HUD] (optical aspects of head-up displays G02B27/01)
- B60K 35/81: for controlling displays
- G02B 27/0093: {with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking}
- G02B 30/27: involving lenticular arrays
- G02B 30/30: involving parallax barriers
- H04N 13/31: using parallax barriers
- H04N 13/363: using image projection screens (volumetric display H04N13/388)
- H04N 13/376: for tracking left-right translational head movements, i.e. lateral movements
- H04N 13/378: for tracking rotational head movements around an axis perpendicular to the screen
- H04N 13/38: for tracking vertical translational head movements
- H04N 13/398: Synchronisation thereof; Control thereof
- H04N 23/60: Control of cameras or camera modules
- B60K 2360/149: Instrument input by detecting viewing direction not otherwise provided for
- B60K 2360/29: Holographic features
- B60K 2360/334: Projection means
- G02B 2027/0134: {of stereoscopic type}
- G02B 2027/0136: {with a single image source for both eyes}
- G02B 2027/014: {comprising information/image processing systems}
- G02B 2027/0187: {slaved to motion of at least a part of the body of the user, e.g. head, eye}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES

## Abstract

A 3D display device includes a display panel, an optical element, a second communication module, and a controller. The display panel is mounted on a moving body and configured to display a parallax image. The optical element is configured to define a propagation direction of image light emitted from the display panel. The second communication module is configured to receive a motion signal indicating a parameter of a motion of the moving body. The controller is configured to cause the display panel to display the parallax image based on the parameter indicated by the motion signal.

## Claims

### Claim 1

A 3D display device, comprising:
a display panel mounted on a moving vehicle in which a user is, the display panel displaying a parallax image to the user;
an optical element which defines a propagation direction of image light emitted from the display panel;
a communication circuitry which receives a motion signal indicating a parameter of a motion of the moving vehicle, the parameter including acceleration indicating a change in the motion of the moving vehicle;
a controller which causes the display panel to display the parallax image based on the parameter indicated by the motion signal;
an imaging device having an imaging range containing a face of the user; and
a table provided in the controller, the table storing data indicating correspondence between acceleration of the moving vehicle in an inter-eye direction of the user and positions of eyes of the user in the inter-eye direction,
wherein, when first positions of the eyes estimated based on a captured image generated by the imaging device and second positions of the eyes estimated based on the acceleration in the inter-eye direction indicated by the motion signal are different from each other, the controller calibrates the data stored in the table by using a difference between the first positions and the second positions.

### Claim 2 (depends on 1)

The 3D display device according to claim 1, wherein the controller causes the display panel to display the parallax image based on a change amount per time of the parameter.

### Claim 3 (depends on 1)

The 3D display device according to claim 1, wherein the controller causes the display panel to display the parallax image based on magnitude of the parameter.

### Claim 4 (depends on 1)

The 3D display device according to claim 1, wherein a first image which is viewed by a first eye of a user, and a second image which is viewed by a second eye of the user and has a parallax with respect to the first image constitute parallax image and are displayed on the display panel, and the controller controls the display panel such that, as a change amount of the parameter of the motion is larger, display positions of the first image and the second image on the display panel are changed more.

### Claim 5 (depends on 1)

The 3D display device according to claim 1, wherein the controller causes the display panel to display the parallax image based on a divergence between a gravity direction and a height direction of the user.

### Claim 6

A head-up display, comprising:
a 3D display device comprising a display panel mounted on a moving vehicle in which a user is, the display panel displaying a parallax image to the user, an optical element which defines a propagation direction of image light emitted from the display panel, a communication circuitry which receives a motion signal indicating a parameter of a motion of the moving vehicle, the parameter including acceleration indicating a change in the motion of the moving vehicle, a controller which causes the display panel to display the parallax image based on the parameter indicated by the motion signal, an imaging device having an imaging range containing a face of the user, and a table provided in the controller, the table storing data indicating correspondence between acceleration of the moving vehicle in an inter-eye direction of the user and positions of eyes of the user in the inter-eye direction; and
an optical member which reflects the image light emitted from the 3D display device and causes the reflected light to reach the eyes of the user,
wherein, when first positions of the eyes estimated based on a captured image generated by the imaging device and second positions of the eyes estimated based on the acceleration in the inter-eye direction indicated by the motion signal are different from each other, the controller calibrates the data stored in the table by using a difference between the first positions and the second positions.

### Claim 7

A moving vehicle, comprising:
a head-up display comprising
a 3D display device comprising a display panel which displays a parallax image to a user, an optical element which defines a propagation direction of image light emitted from the display panel, a communication circuitry which receives a motion signal indicating a parameter of a motion of the moving vehicle, the parameter including acceleration indicating a change in the motion of the moving vehicle, and a controller which causes the display panel to display the parallax image based on the parameter indicated by the motion signal,
an optical member which reflects the image light emitted from the 3D display device and causes the reflected image light to reach the eyes of the user,
an imaging device having an imaging range containing a face of the user, and
a table provided in the controller, the table storing data indicating correspondence between acceleration of the moving vehicle in an inter-eye direction of the user and positions of eyes of the user in the inter-eye direction,
wherein, when first positions of the eyes estimated based on a captured image generated by the imaging device and second positions of the eyes estimated based on the acceleration in the inter-eye direction indicated by the motion signal are different from each other, the controller calibrates the data stored in the table by using a difference between the first positions and the second positions.

### Claim 8

A program of activating a 3D display device mounted on a moving vehicle, the 3D display device comprising a display panel which displays a parallax image for a user, an optical element which defines a propagation direction of image light emitted from the display panel, an imaging device having an imaging range containing a face of the user, a communication circuitry, and a controller which includes a table storing data indicating correspondence between acceleration of the moving vehicle in an inter-eye direction of the user and positions of eyes of the user in the inter-eye direction, the program being provided in the controller and comprising:
activating the controller to cause the communication circuitry to receive a motion signal indicating a parameter of a motion of the moving vehicle, the parameter including acceleration indicating a change in the motion of the moving vehicle; and
activating the controller to cause the display panel to display the parallax image based on the parameter and, when first positions of the eyes estimated based on a captured image generated by the imaging device and second positions of the eyes estimated based on the acceleration in the inter-eye direction indicated by the motion signal are different from each other, calibrate the data stored in the table by using a difference between the first positions and the second positions.

### Claim 9 (depends on 1)

The 3D display device according to claim 1, wherein
the parallax image includes a left-eye image and a right-eye image which has a parallax with respect to the left-eye image,
the optical element is a parallax barrier including a light transmitting region and a dimming region which are alternately arranged repeatedly, and
the controller causes a part of the left-eye image and right-eye image to display a black image when the positions of the eyes change toward the parallax image, the part of the left-eye image and right-eye image being viewable with both the left eye and the right eye through the light transmitting region.