3D DISPLAY DEVICE AND DRIVING METHOD THEREOF

• US 20170214906A1
• Filed: 12/23/2015
• Published: 07/27/2017
• Est. Priority Date: 08/20/2015
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Lu, Pengcheng, Niu, Xiaochen, Dong, Xue, Chen, Xiaochuan, Wang, Qian, Yang, Ming, Yang, Shengji, Gao, Jian, Wang, Lei, Xu, Rui, Liu, Yingming
• Granted Patent: US 10,523,927 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 30/24 involving temporal multiplexing, e.g. using sequentially activated left and right shutters
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02B 30/30 involving parallax barriers
• CPC Class Codes: H04N 13/30 Image reproducers optical systems for producing stereoscopic or other three-dimensional effects G02B30/00
• CPC Class Codes: H04N 13/31 using parallax barriers
• CPC Class Codes: H04N 13/312 the parallax barriers being placed behind the display panel, e.g. between backlight and spatial light modulator [SLM]
• CPC Class Codes: H04N 13/32 using arrays of controllable light sources; using moving apertures or moving light sources
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 2213/001 Constructional or mechanical details

Abstract

A 3D display device and a driving method thereof are disclosed. The 3D display device comprises a grating and a display panel, and the grating is divided into a bright grating cell and a dark grating cell, the grating comprising a substrate and a plurality of OLED light-emitting devices arranged on the substrate. At least a part of the plurality of OLED light emitting devices emit light to apply the operating voltage to form the bright grating cells, and the non-light emitting OLED light-emitting devices form the dark grating cells. The 3D display device is for displaying a 3D picture.

Claims

1. A 3D display device, comprising a grating and a display panel, the grating being divided into a bright grating cell and a dark grating cell, wherein the grating comprises:

a substrate; and

a plurality of OLED light emitting devices arranged on the substrate,

wherein at least a part of the plurality of OLED light-emitting devices emit light when an operating voltage is applied to form the bright grating cell, and the OLED light-emitting devices which do not emit light form the dark grating units.

2. The 3D display device according to claim 1, wherein the grating includes a plurality of repeating units, at least one control signal line and a plurality of data signal lines provided on the substrate;

wherein;

each of the repeating units is provided with a control transistor and an OLED light-emitting device, an output terminal of the control transistor is connected to an anode of the OLED light-emitting device, and a cathode of the OLED light-emitting device is connected to ground;

the at least one control signal line extends in a transverse direction, and each control signal line is connected to a control terminal of the control transistor of at least one of the repeating units to control the control transistor to turn on or turn off; and

the data signal lines extend in a longitudinal direction, and each data signal line is connected to an input terminal of the control transistor of a respective one of the plurality of repeating units to cause the control transistor to output a voltage signal to the OLED light emitting device.

3. The 3D display device according to claim 2, wherein:

the repeating units are arranged in a line and there is one control signal line;

the control signal line is connected to the control terminal of each respective control transistor of the repeating units; and

an odd-numbered column of the data signal lines is connected to the input terminal of the control transistor in an odd-numbered position and an even-numbered column of the data signal lines is connected to the input terminal of the control transistor in an even-numbered position.

4. The 3D display device according to claim 2, wherein:

the repeating units are arranged in an array, and there are plurality of control signal lines;

an odd-numbered row of the control signal lines is connected to the control terminal of an odd-numbered row of control transistors, and an even-numbered row of the control signal lines is connected to the control terminal of an even-numbered row of control transistors; and

an odd-numbered column of the data signal lines is connected to the input terminal of an odd-numbered column of control transistors, and an even-numbered column of the data signal lines is connected to the input terminal of an even-numbered column of control transistors.

5. The 3D display device according to claim 2, wherein:

the repeating units are arranged in an array, and there are a plurality of control signal lines,

the control signal lines include first control signal lines and second control signal lines, and one row of repeating units corresponds to the first control signal lines and the second control signal lines;

an odd-numbered row of the first control signal lines is connected to the control terminal of control transistors in an odd-numbered row and odd-numbered column, and an even-numbered row of the first control signal lines is connected to the control terminal of control transistors in an even-numbered row and even-numbered column;

an odd-numbered row of the second control signal lines is connected to the control terminal of the control transistors in the odd-numbered row and the even-numbered column, and an even-numbered row of the second control signal lines is connected to the control terminal of the control transistors in the even-numbered row and the odd-numbered column; and

an odd-numbered column of the data signal lines is connected to the input terminal of the control transistors in the odd-numbered column, and an even-numbered column of the data signal lines is connected to the input terminal of the control transistors in the even-numbered column.

6. The 3D display device according to claim 2, wherein:

the repeating units are arranged in an array, and there are plurality of control signal lines, and the control signal lines include first control signal lines and second control signal lines, and one row of repeating units corresponds to the first control signal lines and the second control signal lines;

each of the first control signal lines is connected to the control terminals of the control transistors in odd-numbered rows and odd-numbered columns and each of the first control signal lines is connected to the control terminals of the control transistors in even-numbered rows and even-numbered columns;

each of the second control signal lines is connected to the control terminal of the control transistors in odd-numbered rows and even-numbered columns, and each of the second control signal lines is connected to the control terminal of the control transistors in even-numbered rows and odd-numbered columns; and

an odd-numbered column of the data signal lines is connected to the input terminal of the control transistors in an odd-numbered column, and an even-numbered column of the data signal lines is connected to the input terminal of the control transistors in an even-numbered column.

7. The 3D display device according to claim 1, wherein the grating comprises a first electrode layer, a light-emitting layer, and a second electrode layer laminated on the substrate, and the first and second electrode layers are respectively connected to two voltage signal terminals for supplying a voltage signal.

8. The 3D display device according to claim 1, wherein the grating includes a first electrode layer, a light-emitting layer, and a second electrode layer stacked on the substrate, wherein

the first electrode layer comprises a plurality of strip electrodes longitudinally extending and spaced-apart from each other and connected to a first voltage signal terminal for providing a first voltage signal;

and

the second electrode layer includes a plane electrode connected to a second voltage signal terminal for providing a second voltage signal.

9. The 3D display device according to claim 1, wherein the grating comprises a luminescent gate element layer, an insulating layer and a dark grating unit layer which are laminated on the substrate, the bright grating unit layer comprises a first electrode layer, a first light-emitting layer and a second electrode layer laminated together, and the dark grating cell layer comprises a third electrode layer, a second light-emitting layer and a fourth electrode layer laminated together, wherein:

the first electrode layer includes a plurality of first strip electrodes longitudinally extending and spaced-apart from each other, the first strip electrodes being connected to a first voltage signal terminal for providing a first voltage signal;

the third electrode layer includes a plurality of second strip electrodes longitudinally extending and spaced-apart from each other, the second strip electrodes each connected to a second voltage signal terminal for providing a second voltage signal, and a vertical projection of the second strip electrodes on the substrate and a vertical projection of the first strip electrodes on the substrate being alternately arranged in the transverse direction; and

the second electrode layer and the fourth electrode layer each include a plane electrode connected to a third voltage signal terminal for supplying a third voltage signal.

10. The 3D display device according to claim 1, wherein the grating includes a first grating forming layer, an insulating layer, and a second grating forming layer laminated on the substrate, the first grating forming layer includes a first electrode layer, a first light emitting layer and a second electrode layer laminated together, and the second grating forming layer includes a third electrode layer, a second light emitting layer and a fourth electrode layer laminated together, wherein:

the first electrode layer includes a plurality of first strip electrodes longitudinally extending and spaced-apart from each other, the first strip electrodes being connected to a first voltage signal terminal for providing a first voltage signal;

the second electrode layer comprises a plurality of second strip electrodes transversely extending and spaced apart from each other, the second strip electrodes being connected to a second voltage signal terminal for providing a second voltage signal, and an overlapping portion of the second strip electrodes and the first strip electrodes forming a first overlapping portion;

the third electrode layer comprises a plurality of third strip electrodes longitudinally extending and spaced apart from each other, the third strip electrodes being connected to the first voltage signal terminal; and

the fourth electrode layer comprises a plurality of fourth strip electrodes transversely spaced and spaced-apart from each other, the fourth strip electrodes being connected to the second voltage signal terminal, an overlapping portion of the fourth strip electrodes and the third strip electrodes forming a second overlapping portion, a vertical projection of the second overlapping portion on the substrate and a vertical projection of the first overlapping portion on the substrate being alternately arranged in the transverse direction and in the longitudinal direction.

11. The 3D display device according to claim 1, wherein the OLED light-emitting devices in the grating comprise a white-d OLED light-emitting device, and the display panel comprises a color-blocking layer for at least blocking a red light, a green light and a blue light.

12. The 3D display device according to claim 1, wherein the grating is provided on a back surface of the display panel, and the display panel is a liquid crystal display panel.

13. The 3D display device according to claim 12, wherein the display panel includes a TFT array substrate and a color film substrate arranged opposite to each other, and a color filter substrate sandwiched between the TFT array substrate and the color film substrate, and the TFT array substrate is provided with a wire grid polarizer on a side facing away from a liquid crystal layer.

14. A method for driving a 3D display device according to claim 1, comprising:

applying an operating voltage to at least a part of the OLED light emitting devices in the grating of the 3D display device, so that OLED light-emitting devices to which the operating voltage is applied emit light to form a bright grating cell.

15. The method for driving the 3D display device according to claim 14, further comprising:

applying a left-eye image signal to a first half of sub-pixels in the display panel of the 3D display device, and applying a right-eye image signal to a second half of sub-pixels in the display panel,

wherein first half of the sub-pixels to which the left-eye image signal is applied and the second half of the sub-pixels to which the right-eye image signal is applied are alternately arranged in the transverse direction, the bright grating units and the dark grating units of the grating are strip structures, and the bright grating units and the dark grating units are alternately arranged in the transverse direction.

16. The method for driving the 3D display device according to claim 14, further comprising:

applying a left-eye image signal to a first half of sub-pixels in the display panel of the 3D display device, and applying a right-eye image signal to a second half of sub pixels in the display panel,

wherein the first half of the sub-pixels to which the left-eye image signal is applied and the second half of the sub-pixels to which the right-eye image signal is applied are alternately arranged in the transverse direction and in the longitudinal direction, the bright grating cell and the dark grating cell are square structures, and the bright grating units and the dark grating units are arranged alternately in the transverse direction and alternately in the longitudinal direction.