# US 11,307,427 B2 · Image display device, image display system, head-up display, moving body, and image display method

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- Number: US 11,307,427 B2
- Document ID: US11307427B2
- Status: Granted
- Kind: B2
- Application number: 17/255,165
- Filed: 2019-06-21
- Published: 2021-08-26
- Granted: 2022-04-19
- Earliest claimed: 2018-06-26
- Assignees: KYOCERA Corporation
- Applicants: KYOCERA Corporation
- Inventors: Kaoru Kusafuka
- Web page: https://patentgrep.com/patent/US11307427B2

## CPC

- G02B 27/0179: {Display position adjusting means not related to the information to be displayed}
- H04N 13/366: using viewer tracking
- B60K 35/211: {producing three-dimensional [3D] effects, e.g. stereoscopic images}
- B60K 35/235: with means for detecting the driver's gaze direction or eye points
- G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)}
- G02B 30/30: involving parallax barriers
- H04N 13/31: using parallax barriers
- H04N 13/317: using slanted parallax optics
- H04N 13/324: Colour aspects
- H04N 13/398: Synchronisation thereof; Control thereof
- B60K 35/10: Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
- G02B 2027/0134: {of stereoscopic type}
- G02B 2027/0187: {slaved to motion of at least a part of the body of the user, e.g. head, eye}
- G09G 3/003: {to produce spatial visual effects}
- 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
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

An image display device includes a display panel, an optical element, an acquisition unit, and a controller. The controller is configured to be able to switch an image displayed on subpixels between a left eye image and a right eye image. The display panel includes red subpixels and green subpixels which are different in a width in an x direction. The controller is configured to control the plurality of subpixels as a group, and is configured so that, when an image displayed by one red subpixel belonging to the group is changed from the left eye image to the right eye image, an image displayed by another red subpixel belonging to the same group is changed from the left eye image to the right eye image.

## Claims

### Claim 1

An image display device, comprising:
a display panel comprising a plurality of subpixels arranged in a grid along a first direction corresponding to a parallax direction of a user and a second direction intersecting the first direction;
an optical element configured to define a light beam direction of an image displayed on the display panel;
an acquisition unit configured to acquire a first position of a first eye of the user and a second position of a second eye of the user, the second eye being different from the first eye; and
a controller configured to be able to switch a display position for displaying a first image visually recognized by the first eye of the user and a second image visually recognized by the second eye of the user for each subpixel included in the plurality of subpixels based on the first position and the second position,
the plurality of subpixels comprising a plurality of first subpixels configured to emit light of a first color and a plurality of second subpixels configured to emit light of a second color different from the first color,
a length of the first subpixels along the first direction being different from a length of the second subpixels along the first direction, and
the controller being configured to
control the plurality of subpixels comprising the plurality of first subpixels and the plurality of second subpixels as a group,
change an image displayed by a first subpixel of the plurality of first subpixels from the first image to the second image at a first timing, and
change an image displayed by a second subpixel of the plurality of second subpixels from the first image to the second image at a second timing,
wherein the first timing is a timing different from the second timing.

### Claim 2 (depends on 1)

The image display device according to claim 1, wherein
the optical element comprises a plurality of optical components configured to be arranged along the first direction and define the light beam direction.

### Claim 3 (depends on 2)

The image display device according to claim 2, wherein
the optical components each comprise a dimming region which constitutes a parallax barrier and has a slit shape.

### Claim 4 (depends on 2)

The image display device according to claim 2, wherein
the optical components are arranged to face the display panel and extend along a third direction intersecting the first direction and the second direction.

### Claim 5 (depends on 4)

The image display device according to claim 4, wherein
the display panel comprises a plurality of pixels each comprising a predetermined number of subpixels including the first subpixel and the second subpixel,
the third direction is a direction in which b pieces of pixels advance in the second direction while a pieces of pixels advance in the first direction, and
a and b are integers other than 0 that are relatively prime.

### Claim 6 (depends on 5)

The image display device according to claim 5, wherein
a pitch in the first direction on the display panel of the optical components projected from a point at an optimal viewing distance where the user's eyes are located is defined by a distance in the first direction between two straight lines extending in the third direction that pass through two different vertices of the plurality of pixels.

### Claim 7 (depends on 1)

The image display device according to claim 1, wherein
a plurality of subpixels belonging to the group extend in a plane along the first direction and the second direction.

### Claim 8 (depends on 1)

The image display device according to claim 1, wherein
when the image displayed by the first subpixel is changed from the first image to the second image, the controller is further configured to change an image displayed by another first subpixel of the plurality of first subpixels from the second image to the first image.

### Claim 9

An image display system, comprising:
a display panel comprising a plurality of subpixels arranged in a grid along a first direction corresponding to a parallax direction of a user and a second direction intersecting the first direction;
an optical element configured to define a light beam direction of an image displayed on the display panel;
a detection device configured to be able to detect a first position of a first eye of the user and a second position of a second eye of the user, the second eye being different from the first eye; and
a controller configured to be able to switch a display position for displaying a first image visually recognized by the first eye of the user and a second image visually recognized by the second eye of the user for each subpixel included in the plurality of subpixels based on the first position and the second position detected by the detection device,
the plurality of subpixels comprising a plurality of first subpixels configured to emit light of a first color and a plurality of second subpixels configured to emit light of a second color different from the first color,
a length of the first subpixels along the first direction being different from a length of the second subpixels along the first direction, and
the controller being configured to
control the plurality of subpixels comprising the plurality of first subpixels and the plurality of second subpixels as a group,
change an image displayed by a first subpixel of the plurality of first subpixels from the first image to the second image at a first timing, and
change an image displayed by a second subpixel of the plurality of second subpixels from the first image to the second image at a second timing,
wherein the first timing is a timing different from the second timing.

### Claim 10 (depends on 9)

The image display system according to claim 9, wherein
when the image displayed by the first subpixel is changed from the first image to the second image, the controller is further configured to change an image displayed by another first subpixel of the plurality of first subpixels from the second image to the first image.

### Claim 11

A head-up display, comprising:
a display panel comprising a plurality of subpixels arranged in a grid along a first direction corresponding to a parallax direction of a user and a second direction intersecting the first direction;
an optical element configured to define a light beam direction of an image displayed on the display panel;
a detection device configured to be able to detect a first position of a first eye of the user and a second position of a second eye of the user, the second eye being different from the first eye;
a controller configured to be able to switch a display position for displaying a first image visually recognized by the first eye of the user and a second image visually recognized by the second eye of the user for each subpixel included in the plurality of subpixels based on the first position and the second position detected by the detection device; and
an optical system configured to project a virtual image of the display panel, the optical system being arranged on a side of the display panel and the optical element on which side the user's eyes are positioned,
the plurality of subpixels comprising a plurality of first subpixels configured to emit light of a first color and a plurality of second subpixels configured to emit light of a second color different from the first color,
a length of the first subpixels along the first direction being different from a length of the second subpixels along the first direction, and
the controller being configured to
control the plurality of subpixels comprising the plurality of first subpixels and the plurality of second subpixels as a group,
change an image displayed by a first subpixel of the plurality of first subpixels from the first image to the second image at a first timing, and
change an image displayed by a second subpixel of the plurality of second subpixels from the first image to the second image at a second timing,
wherein the first timing is a timing different from the second timing.

### Claim 12 (depends on 11)

The head-up display according to claim 11, wherein
when the image displayed by the first subpixel is changed from the first image to the second image, the controller is further configured to change an image displayed by another first subpixel of the plurality of first subpixels from the second image to the first image.

### Claim 13

A moving body, comprising:
a head-up display comprising
a display panel comprising a plurality of subpixels arranged in a grid along a first direction corresponding to a parallax direction of a user and a second direction intersecting the first direction;
an optical element configured to define a light beam direction of an image displayed on the display panel;
a detection device configured to be able to detect a first position of a first eye of the user and a second position of a second eye of the user, the second eye being different from the first eye;
a controller configured to be able to switch a display position for displaying a first image visually recognized by the first eye of the user and a second image visually recognized by the second eye of the user for each subpixel included in the plurality of subpixels based on the first position and the second position detected by the detection device; and
an optical system configured to project a virtual image of the display panel, the optical system being arranged on a side of the display panel and the optical element on which side the user's eyes are positioned,
the plurality of subpixels comprising a plurality of first subpixels configured to emit light of a first color and a plurality of second subpixels configured to emit light of a second color different from the first color,
a length of the first subpixels along the first direction being different from a length of the second subpixels along the first direction, and
the controller being configured to
control the plurality of subpixels including the plurality of first subpixels and the plurality of second subpixels as a group,
change an image displayed by a first subpixel of the plurality of first subpixels from the first image to the second image at a first timing, and
change an image displayed by a second subpixel of the plurality of second subpixels from the first image to the second image at a second timing,
wherein the first timing is a timing different from the second timing.

### Claim 14 (depends on 13)

The moving body according to claim 13, wherein
when the image displayed by the first subpixel is changed from the first image to the second image, the controller is further configured to change an image displayed by another first subpixel of the plurality of first subpixels from the second image to the first image.

### Claim 15

An image display method, comprising:
acquiring a first position of a first eye of a user and a second position of a second eye of the user, by an acquisition unit, the second eye being different from the first eye;
displaying a first image or a second image on each of a plurality of subpixels which are included in the display panel and arranged in a grid along a first direction corresponding to a parallax direction of the user and a second direction intersecting the first direction, based on the first position and the second position by a controller; and
causing the first image to reach the first eye of the user and the second image to reach the second eye of the user, by an optical element,
the plurality of subpixels comprising a plurality of first subpixels configured to emit light of a first color and a plurality of second subpixels configured to emit light of a second color different from the first color,
a length of the first subpixels along the first direction being different from a length of the second subpixels along the first direction, and
the controller being configured to
control the plurality of subpixels comprising the plurality of first subpixels and the plurality of second subpixels as a group,
change an image displayed by a first subpixel of the plurality of first subpixels from the first image to the second image at a first timing, and
change an image displayed by a second subpixel of the plurality of second subpixels from the first image to the second image at a second timing,
wherein the first timing is a timing different from the second timing.

### Claim 16 (depends on 15)

The image display method according to claim 15, wherein
when the image displayed by the first subpixel is changed from the first image to the second image, the controller is further configured to change an image displayed by another first subpixel of the plurality of first subpixels from the second image to the first image.