METHOD OF ADJUSTING DISPLAY DEVICE DRIVING VOLTAGE AND DISPLAY DEVICE

• US 20150154929A1
• Filed: 05/08/2014
• Published: 06/04/2015
• Est. Priority Date: 12/03/2013
• Status: Active Grant

• Current Assignee: Tianma Microelectronics Company Limited, Xiamen Tianma Micro-Electronics Co., Ltd.
• Original Assignee: Tianma Microelectronics Company Limited, Xiamen Tianma Micro-Electronics Co., Ltd.
• Inventors: LI, Yuan, Du, Yi
• Granted Patent: US 9,773,463 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0271 Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

The present invention discloses methods of adjusting display device driving voltage and a display device, which are used for improving pressing unevenness (Trace Mura) of the display device caused by pressing or paddling. The method comprises: comparing the driving voltage of a display device with a driving voltage threshold; and if the driving voltage is larger than the driving voltage threshold, adjusting the driving voltage to make the adjusted driving voltage be smaller than or equal to the driving voltage threshold.

Claims

1. A method of adjusting display device driving voltage, comprising:

comparing a driving voltage of a display device with a driving voltage threshold; and

if the driving voltage is larger than the driving voltage threshold, adjusting the driving voltage to make the adjusted driving voltage be smaller than or equal to the driving voltage threshold.

2. The method according to claim 1, wherein liquid crystal transmittance corresponding to value of the driving voltage threshold is larger than 60% of the liquid crystal transmittance in the display device.

3. The method according to claim 1, wherein if the driving voltage is larger than the driving voltage threshold, adjusting the driving voltage to make the adjusted driving voltage be smaller than or equal to the driving voltage threshold comprises:

adjusting the value of the driving voltage higher than a preset driving voltage threshold to the preset driving voltage threshold to make the adjusted driving voltage be equal to the preset driving voltage threshold.

4. The method according to claim 1, wherein adjusting the driving voltage to make the adjusted driving voltage be smaller than or equal to the driving voltage threshold comprises:

selecting a gamma curve from at least two preset gamma curves according to the driving voltage threshold to adjust the driving voltage so as to make the adjusted driving voltage be smaller than or equal to the driving voltage threshold, wherein the highest driving voltage of the selected gamma curve is closest to the driving voltage threshold.

5. The method according to claim 1, wherein before comparing the driving voltage of the display device with the driving voltage threshold, the method further comprises:

detecting triggering signal, and comparing the driving voltage of the display device with the driving voltage threshold when the triggering signal is detected.

6. A display device, comprising a driving unit and a display panel, wherein

the driving unit is configured to compare a driving voltage of the display device with a driving voltage threshold, and to adjust the driving voltage to make the adjusted driving voltage be smaller than or equal to the driving voltage threshold when the driving voltage is larger than the driving voltage threshold;

and

the display panel is configured to display under drive of the driving voltage adjusted by the driving unit.

7. The display device according to claim 6, further comprising a touch screen, wherein the touch screen is configured to receive a triggering signal.

8. The display device according to claim 7, further comprising a control unit, wherein the control unit is configured to detect the triggering signal and to send an indication signal to the driving unit, wherein the indication signal is used for indicating the driving unit to adjust the driving voltage for driving the display panel to display.

9. The display device according to claim 7, wherein a touch control region is defined by the triggering signal, and the driving unit only adjusts the driving voltage of the touch control region of the display panel.