Method of adjusting display device driving voltage and display device

• US 9,773,463 B2
• Filed: 05/08/2014
• Issued: 09/26/2017
• 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
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): Khoo, Stacy
• Application Number:
  US14/272,519
• Publication Number:
  US 20150154929A1
• Time in Patent Office: 1,237 Days
• Field of Search: 345 77, 345 87-104, 345690-697, 348246-247, 349192
• 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:

in response to receiving a driving voltage of a display device, comparing the driving voltage with a driving voltage threshold to determine whether the driving voltage is larger than the driving voltage threshold, wherein the sliding tail unevenness (Trace Mura) of the display device corresponding to driving voltages higher than the driving voltage threshold exceeds predetermined acceptable Trace Mura for the display device; and

when it is determined that the driving voltage is larger than the driving voltage threshold, adjusting the driving voltage to make the driving voltage smaller than or equal to the driving voltage threshold such that Trace Mura for the display device is reduced;

wherein adjusting the driving voltage to make the driving voltage 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 to make the driving voltage smaller than or equal to the driving voltage threshold, wherein a highest driving voltage on the selected gamma curve is closest to the driving voltage threshold.

2. The method according to claim 1, wherein liquid crystal transmittance corresponding to the 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 before comparing the driving voltage of the display device with the driving voltage threshold, the method further comprises:

detecting a triggering signal indicating a touch operation by a user; and

, wherein

comparing the driving voltage of the display device with the driving voltage threshold for reducing Trace Mura of the display device only when the triggering signal is detected.

4. A display device, comprising a processor, a memory and a display panel, wherein the memory is configured to store codes of a computer program and the processor is configured to execute the computer program to:

in response to receiving a driving voltage of a display device, compare a driving voltage of the display device with a driving voltage threshold to determine whether the driving voltage is larger than the driving voltage threshold, wherein the sliding tail unevenness (Trace Mura) of the display device corresponding to driving voltages higher than the driving voltage threshold exceeds predetermined acceptable Trace Mura for the display device, and

adjust the driving voltage to make the driving voltage smaller than or equal to the driving voltage threshold such that Trace Mura for the display device is reduced, when it is determined that the driving voltage is larger than the driving voltage threshold; and

the display panel is configured to display based on the driving voltage adjusted by the driving unit;

wherein the processor configured to adjust the driving voltage to make the driving voltage smaller than or equal to the driving voltage threshold is configured to;

select a gamma curve from at least two preset gamma curves according to the driving voltage threshold to adjust the driving voltage to make the driving voltage smaller than or equal to the driving voltage threshold, wherein a highest driving voltage on the selected gamma curve is closest to the driving voltage threshold.

5. The display device according to claim 4, further comprising a touch screen, wherein the touch screen is configured to receive a triggering signal.

6. The display device according to claim 5, the processor is further configured to detect the triggering signal indicating a touch operation by a user and adjust the driving voltage for driving the display panel to display when the triggering signal is detected.

7. The display device according to claim 5, wherein a touch control region is defined by the triggering signal, and the processor is configured to only adjust the driving voltage of the touch control region of the display panel.