METHOD FOR DRIVING TOUCH DISPLAY APPARATUS AND TOUCH DISPLAY APPARATUS

• US 20160266697A1
• Filed: 04/14/2014
• Published: 09/15/2016
• Est. Priority Date: 12/26/2013
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: CHENG, Hongfei, ZHANG, Yuxin
• Granted Patent: US 10,101,842 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133601 for spatial active dimming
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• 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 3/044 by capacitive means
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/3677 suitable for active matrices only
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

Embodiments of the present disclosure provide a method for driving a touch display apparatus and the touch display apparatus, wherein the quality of the screen display of the touch display apparatus is ensured, by controlling a backlight to be turned on during a first time phase of a time unit, controlling the backlight to be turned off during a second time phase of the time unit, and transmitting, by the chip, a touch driving signal to the touch driving electrodes during a third time phase of the time unit, wherein there is a first relationship between the second time phase and the third time phase.

Claims

1. A method for driving a touch display apparatus, the touch display apparatus comprising a touch panel, a chip, touch driving electrodes and a backlight, wherein the method comprises:

controlling the backlight to be turned on during a first time phase of a time unit;

controlling the backlight to be turned off during a second time phase of the time unit;

transmitting, by the chip, a touch driving signal to the touch driving electrodes during a third time phase of the time unit,

wherein there is a first relationship between the second time phase and the third time phase.

2. The method according to claim 1, wherein the first relationship is that:

a start time of the second time phase is the same as a start time of the third time phase; and

an end time of the second time phase is the same as an end time of the third time phase.

3. The method according to claim 1, wherein the first relationship is that:

a start time of the second time phase is the same as a start time of the third time phase; and

an end time of the second time phase is later than an end time of the third time phase.

4. The method according to claim 1, wherein the first relationship is that:

a start time of the second time phase is earlier than a start time of the third time phase; and

an end time of the second time phase is the same as an end time of the third time phase.

5. The method according to claim 1, wherein the first relationship is that:

a start time of the second time phase is earlier than a start time of the third time phase; and

an end time of the second time phase is later than an end time of the third time phase.

6. The method according to claim 1, wherein the time unit is a time of one frame.

7. The method according to claim 6, wherein the time unit is equal to a sum of a length of the first time phase and a length of the second time phase.

8. The method according to claim 1, wherein the first time phase is a display phase and the second time phase is a touch phase.

9. A touch display apparatus, wherein the touch display apparatus is driven by using the method for driving the touch display apparatus according to claim 1.

10. The touch display apparatus according to claim 9, wherein the touch panel is an ADS mode liquid crystal screen.

11. The touch display apparatus according to claim 9, wherein the touch panel comprises an upper substrate and a lower substrate, wherein sensing electrodes are provided on the upper substrate, common electrodes and pixel electrodes are provided on the lower substrate and at different layers, and a liquid crystal layer is provided between the sensing electrodes and the common electrodes.

12. The touch display apparatus according to claim 11, wherein the common electrodes and the pixel electrodes are covered by an insulation layer and a passivation layer respectively.

13. The touch display apparatus according to claim 9, wherein the first relationship is that:

a start time of the second time phase is the same as a start time of the third time phase; and

an end time of the second time phase is the same as an end time of the third time phase.

14. The touch display apparatus according to claim 9, wherein the first relationship is that:

a start time of the second time phase is the same as a start time of the third time phase; and

an end time of the second time phase is later than an end time of the third time phase.

15. The touch display apparatus according to claim 9, wherein the first relationship is that:

a start time of the second time phase is earlier than a start time of the third time phase; and

an end time of the second time phase is the same as an end time of the third time phase.

16. The touch display apparatus according to claim 9, wherein the first relationship is that:

a start time of the second time phase is earlier than a start time of the third time phase; and

an end time of the second time phase is later than an end time of the third time phase.

17. The touch display apparatus according to claim 9, wherein the time unit is a time of one frame.

18. The touch display apparatus according to claim 17, wherein the time unit is equal to a sum of a length of the first time phase and a length of the second time phase.

19. The touch display apparatus according to claim 9, wherein the first time phase is a display phase and the second time phase is a touch phase.