# US 10,481,405 B2 · Three dimension display device and controlling method thereof

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- Number: US 10,481,405 B2
- Document ID: US10481405B2
- Status: Granted
- Kind: B2
- Application number: 15/519,615
- Filed: 2016-01-05
- Published: 2018-05-31
- Granted: 2019-11-19
- Earliest claimed: 2015-08-20
- Assignees: Boe Technology Group Co., Ltd.; Beijing Boe Optoelectronics Technology Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.; Beijing Boe Optoelectronics Technology Co., Ltd.
- Inventors: Pengcheng Lu; Xue Dong; Xiaochuan Chen; Ming Yang; Qian Wang; Lei Wang; Rui Xu; Jian Gao; Xiaochen Niu
- Web page: https://patentgrep.com/patent/US10481405B2

## CPC

- 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
- G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)}
- H04N 13/30: Image reproducers (optical systems for producing stereoscopic or other three-dimensional [3D] effects G02B30/00)
- H04N 13/312: the parallax barriers being placed behind the display panel, e.g. between backlight and spatial light modulator [SLM]
- H04N 13/315: the parallax barriers being time-variant
- H04N 13/32: using arrays of controllable light sources; using moving apertures or moving light sources
- H04N 13/366: using viewer tracking
- H04N 13/398: Synchronisation thereof; Control thereof
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A 3D display device includes a display panel for displaying an image and a grating structure cooperating with the display panel to provide a 3D display effect. The grating structure includes a plurality of gratings capable of being switched between a transparent state and a nontransparent state. The 3D display device further includes: an eye tracking unit configured to acquire positions of eyes of a viewer; and a control unit connected to the eye tracking unit and configured to control the gratings to be switched between the transparent state and the nontransparent state in accordance with the positions of the eyes of the viewer, to enable a left eye of the viewer to view a first view displayed on the display panel through the grating structure and enable a right eye of the viewer to view a second view displayed on the display panel through the grating structure.

## Claims

### Claim 1

A three dimension (3D) display device, comprising a display panel for displaying an image and a gratin g structure cooperating with the display panel to provide a 3D display effect, wherein the grating structure comprises a plurality of gratings capable of being switched between a transparent state and a nontransparent state, and
the 3D display device further comprises:
an eye tracking unit configured to acquire positions of eyes of a viewer; and
a control unit connected to the eye tracking unit and configured to control the gratings to be switched between the transparent state and the nontransparent state in accordance with the positions of the eyes of the viewer, to enable a left eye of the viewer to view a first view displayed on the display panel through the grating structure and enable a right eye of the viewer to view a second view displayed on the display panel through the grating structure,
wherein the grating structure consists of a backlight arranged at a rear side of the display panel, the backlight comprises a plurality of light-emitting units arranged separately, and each of the light-emitting units forms the grating in the transparent state when emitting light and forms the grating in the nontransparent state when not emitting light, and
wherein the control unit further comprises a third controller configured to adjust a size of the light-emitting unit in accordance with a distance between the backlight and the display panel and a distance between a viewer's eyes and the display panel.

### Claim 2 (depends on 1)

The 3D display device according to claim 1, wherein the control unit comprises:
a first controller configured to apply a first signal to the display panel, to enable a plurality of first pixel units spaced apart from each other on the display panel to display the first view and enable a plurality of second pixel units each arranged between adjacent first pixel units on the display panel to display the second view; and
a second controller configured to apply a second signal to the grating structure, to enable a plurality of first gratings of the grating structure spaced apart from each other to be in the transparent state and enable a plurality of second gratings of the grating structure each arranged between adjacent first gratings to be in the nontransparent state.

### Claim 3 (depends on 1)

The 3D display device according to claim 1, wherein the light-emitting unit is of a circular, rectangular or trapezoidal shape.

### Claim 4 (depends on 1)

The 3D display device according to claim 1, wherein the backlight is a white organic light-emitting diode (OLED) display screen or a red-green-blue OLED display screen;
when the backlight is the white OLED display screen, the display panel comprises a color filter;
when the backlight is the red-green-blue OLED display screen, the display panel comprises no color filter.

### Claim 5 (depends on 4)

The 3D display device according to claim 4, wherein the light-emitting unit comprises n OLED pixel units in an identical column, and during the 3D display, the OLED pixel units on the OLED display screen are turned on alternately in such a manner that the OLED pixel units in one column are in a dark state and the OLED pixel units in an adjacent column are in a bright state.

### Claim 6 (depends on 4)

The 3D display device according to claim 4, wherein the light-emitting unit comprises m*n OLED pixel units in m adjacent columns, and during the 3D display, the OLED pixels units on the OLED display screen are turned on alternately in such a manner that the OLED pixel units in m columns are in a dark state and the OLED pixel units in m adjacent columns are in a bright state.

### Claim 7

A method for controlling a three dimension (3D) display device, the 3D display device comprising a display panel for displaying an image and a grating structure cooperating with the display panel to provide a 3D display effect, the grating structure comprising a plurality of gratings capable of being switched between a transparent state and a nontransparent state, the method comprising steps of:
acquiring positions of eyes of a viewer;
adjusting a size of the light-emitting unit in accordance with a distance between the backlight and the display panel and a distance between the viewer's eyes and the display panel; and
controlling the gratings to be switched between the transparent state and the nontransparent state in accordance with the positions of the eyes of the viewer, to enable a left eye of the viewer to view a first view displayed on the display panel through the grating structure and enable a right eye of the viewer to view a second view displayed on the display panel through the grating structure,
wherein the grating structure consists of a backlight arranged at a rear side of the display panel, the backlight comprises a plurality of light-emitting units arranged separately, and each of the light-emitting units forms the grating in the transparent state when emitting light and forms the grating in the nontransparent state when not emitting light.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the step of controlling the gratings to be switched between the transparent state and the nontransparent state in accordance with the positions of the eyes of the viewer, to enable the left eye of the viewer to view the first view displayed on the display panel through the grating structure and enable the right eye of the viewer to view the second view displayed on the display panel through the grating structure comprises:
applying a first signal to the display panel, to enable a plurality of first pixel units spaced apart from each other on the display panel to display the first view and enable a plurality of second pixel units each arranged between the adjacent first pixel units on the display panel to display the second view; and
applying a second signal to the grating structure, to enable a plurality of first gratings of the grating structure spaced apart from each other to be in the transparent state and enable a plurality of second gratings of the grating structure each arranged between the adjacent first gratings to be in the nontransparent state.

### Claim 9 (depends on 7)

The method according to claim 7, wherein the light-emitting unit comprises n OLED pixel units in an identical column, and during the 3D display, the OLED pixel units on the OLED display screen are turned on alternately in such a manner that the OLED pixel units in one column are in a dark state and the OLED pixel units in an adjacent column are in a bright state.

### Claim 10 (depends on 7)

The method according to claim 7, wherein the light-emitting unit comprises m*n OLED pixel units in m adjacent columns, and during the 3D display, the OLED pixels units on the OLED display screen are turned on alternately in such a manner that the OLED pixel units in m columns are in a dark state and the OLED pixel units in m adjacent columns are in a bright state.

### Claim 11 (depends on 1)

The 3D display device according to claim 1, comprising no light splitter.

### Claim 12 (depends on 11)

The 3D display device according to claim 11, comprising no lens.