Display device and driving method and manufacturing method thereof

• US 10,222,642 B2
• Filed: 10/31/2014
• Issued: 03/05/2019
• Est. Priority Date: 06/30/2014
• Status: Expired due to Fees

• 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: Yang, Shengji
• Primary Examiner(s): Ketema, Benyam
• Application Number:
  US14/762,667
• Publication Number:
  US 20160246094A1
• Time in Patent Office: 1,586 Days
• Field of Search: 345173
• CPC Class Codes: G02B 30/27 involving lenticular arrays
• CPC Class Codes: G02B 30/28 involving active lenticular arrays
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
• CPC Class Codes: H04N 13/31 using parallax barriers

Abstract

The present invention discloses a display device and a driving method and manufacturing method thereof. The display device comprises: a display module and a liquid crystal cell which are arranged opposite to each other. The display module comprises first electrodes, and the liquid crystal cell comprises second electrodes and a third electrode arranged opposite to the second electrodes. The first electrodes and the second electrodes extend in different directions. During stereoscopic display, a coupling electric field is formed between the first electrodes and the second electrodes within a touch period, and a grating electric field is formed between the second electrodes and the third electrode within a stereoscopic display period. The coupling electric field is used for generating a touch signal when a touch occurs, and the grating electric field allows the display module to form a display picture for stereoscopic display.

Claims

1. A display device, comprising a display module and a liquid crystal cell which are arranged opposite to each other, wherein the display module comprises first electrodes, and the liquid crystal cell comprises a liquid crystal layer, second electrodes and a third electrode, with the first electrodes and the second electrodes extending in different directions, wherein the display module is located on one side of the liquid crystal cell away from a display surface of the display device, the second electrodes are located on a side of the liquid crystal layer proximal to the display module, and the third electrode is located on a side of the liquid crystal layer away from the display module;

and

during stereoscopic display, a coupling electric field is formed between each of the first electrodes and all of the second electrodes within a touch period, and the first electrodes act as common electrodes and a grating electric field is formed between the second electrodes and the third electrode within a stereoscopic display period; and

the coupling electric field is used for generating a touch signal when a touch occurs, and the grating electric field allows the display module to form a display picture for stereoscopic display.

2. The display device according to claim 1, wherein the display module further comprises a fourth electrode;

and

during 2D display, a coupling electric field is formed between the first electrodes and the second electrodes within a touch period, a flat display electric field is formed between the fourth electrode and the first electrodes within a flat display period, and the flat display electric field allows the display module to form a display picture for 2D display.

3. The display device according to claim 1, wherein the first electrodes are of a strip structure, the second electrodes are of a strip structure, and the third electrode is of a planar structure.

4. The display device according to claim 2, wherein the liquid crystal cell comprises an upper substrate and a lower substrate which are arranged opposite to each other, with liquid crystals being filled there between, the second electrodes is disposed on the lower substrate, and the third electrode is disposed on the upper substrate.

5. The display device according to claim 4, Wherein the display module comprises a first substrate and a second substrate which are arranged opposite to each other, with liquid crystals being filled there between, the lower substrate is located on the second substrate, and the first substrate comprises the first electrodes.

6. The display device according to claim 1, wherein during stereoscopic display, a voltage signal applied on the third electrode is the same as a voltage signal applied on the second electrodes.

7. The display device according to claim 2, wherein during 2D display, a voltage signal applied on the third electrode is the same as a voltage signal applied on the second electrodes.

11. The display device according to claim 7, wherein during 2D display, the voltage signal applied on the third electrode and the second electrodes is a voltage signal of 0V.

8. A driving method for driving a display device which comprises a display module and a liquid crystal cell arranged opposite to the display module, the display module comprising first electrodes, the liquid crystal cell comprising a liquid crystal layer, second electrodes and a third electrode, the first electrodes and the second electrodes extending in different directions, and the display module further comprising a fourth electrode, wherein the display module is located on one side of the liquid crystal cell away from a display surface of the display device, the second electrodes are located on a side of the liquid crystal layer proximal to the display module, and the third electrode is located on a side of the liquid crystal layer away from the display module;

the driving method comprises the following steps of;

during stereoscopic display, forming a coupling electric field between each of the first electrodes and all of the second electrodes within a touch period, the coupling electric field being used for generating a touch signal when a touch occurs; and

applying the first electrodes with a common electrode voltage and forming a grating electric field between the second electrodes and the third electrode within a stereoscopic display period, the grating electric field allowing the display module to form a display picture for stereoscopic display.

9. The driving method according to claim 8, further comprising:

during 2D display, forming a coupling electric field between the first electrodes and the second electrodes within a touch period; and

forming a flat panel display electric field between the fourth electrode and the first electrodes within a flat panel display period, the flat panel display electric field allowing the display module to form a display picture for 2D display.

12. The driving method according to claim 8, further comprising:

during 2D display, applying a same voltage signal to the third electrode and the second electrodes.

13. The driving method according to claim 12, further comprising:

during 2D display, applying a voltage signal of 0V to the third electrode and the second electrodes.

10. A manufacturing method of a display device, comprising:

preparing a display module, the display module comprising first electrodes;

preparing a liquid crystal cell, the liquid crystal cell comprising a liquid crystal layer, second electrodes and a third electrode arranged opposite to the second electrodes, the first electrodes and the second electrodes extending in different directions, wherein the display module is located on one side of the liquid crystal cell away from a display surface of the display device, the second electrodes are located on a side of the liquid crystal layer proximal to the display module, and the third electrode is located on a side of the liquid crystal layer away from the display module;

during stereoscopic display, a coupling electric field being formed between each of the first electrodes and all of the second electrodes within a touch period, and the first electrodes act as common electrodes and a grating electric field being formed between the second electrodes and the third electrode within a stereoscopic display period, the coupling electric field being used for generating a touch signal when a touch occurs, and the grating electric field allowing the display module to form a display picture for stereoscopic display; and

arranging the display module and the liquid crystal cell opposite to each other.