Display apparatus and gate driving method thereof

Patent metadata

Field	Value
Publication number	US-9875707-B2
Application number	US-201514708303-A
Country	US
Kind code	B2
Filing date	May 11, 2015
Priority date	May 11, 2015
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A display apparatus and a gate driving method thereof are provided. The display apparatus includes a display panel and a gate driver. The display panel has a plurality of gate lines. Output terminals of the gate driver are coupled to the gate lines in a one-to-one manner. The gate driver is configured to drive the gate lines according to a scrambled scan sequence.

First claim

What is claimed is:

1. A display apparatus comprising:
a display panel having a plurality of gate lines; and
a gate driver, having a plurality of output terminals coupled to the gate lines in a one-to-one manner, configured to drive the gate lines according to a scrambled scan sequence, wherein the gate driver is configured to determine the scrambled scan sequence in a first frame period according to a first pseudo-random binary sequence, and the gate driver is configured to determine the scrambled scan sequence in a second frame period according to a second pseudo-random binary sequence different from the first pseudo-random binary sequence.

2. The display apparatus as recited in claim 1 , wherein the gate driver is configured to determine the scrambled scan sequence according to a pseudo-random binary sequence.

3. The display apparatus as recited in claim 1 , wherein the gate lines are at least categorized into a first gate line group and a second gate line group, the gate driver is configured to determine the scrambled scan sequence of the first gate line group according to a first pseudo-random binary sequence, and the gate driver is configured to determine the scrambled scan sequence of the second gate line group according to a second pseudo-random binary sequence different from the first pseudo-random binary sequence.

4. The display apparatus as recited in claim 1 , further comprising a random number table, wherein the gate driver is configured to determine the scrambled scan sequence according to the random number table.

5. The display apparatus as recited in claim 1 , further comprising a first random number table and a second random number table, wherein the gate lines are at least categorized into a first gate line group and a second gate line group, the gate driver is configured to determine the scrambled scan sequence of the first gate line group according to the first random number table, and the gate driver is configured to determine the scrambled scan sequence of the second gate line group according to the second random number table different from the first random number table.

6. The display apparatus as recited in claim 1 , further comprising a first random number table and a second random number table, wherein the gate driver is configured to determine the scrambled scan sequence in a first frame period according to the first random number table, and the gate driver is configured to determine the scrambled scan sequence in a second frame period according to the second random number table different from the first random number table.

7. The display apparatus as recited in claim 1 , further comprising:
a timing controller, coupled to the gate driver, configured to obtain a detection result by detecting image data in a frame period, and control the gate driver to select a non-scrambled scan sequence or the scrambled scan sequence according to the detection result for driving the gate lines.

8. The display apparatus as recited in claim 1 , further comprising:
a source driver, coupled to the display panel, configured to drive source lines of the display panel according to image data,
wherein the gate driver selects the scrambled scan sequence to drive the gate lines if a temperature of the source driver is within a high-temperature range, and the gate driver selects a non-scrambled scan sequence to drive the gate lines if the temperature of the source driver is within a low-temperature range.

9. The display apparatus as recited in claim 1 , further comprising:
a source driver, coupled to the display panel, configured to drive source lines of the display panel according to image data,
wherein the gate driver selects the scrambled scan sequence to drive the gate lines if power consumption of the source driver is within a high-power range, and the gate driver selects a non-scrambled scan sequence to drive the gate lines if the power consumption of the source driver is within a low-power range.

10. A gate driving method adopted in a display apparatus, comprising:
providing a display panel;
determining a scrambled scan sequence in a first frame period by a gate driver according to a first pseudo-random binary sequence;
determining the scrambled scan sequence in a second frame period by the gate driver according to a second pseudo-random binary sequence different from the first pseudo-random binary sequence; and
driving a plurality of gate lines of the display panel by the gate driver according to the scrambled scan sequence.

11. The gate driving method as recited in claim 10 , further comprising:
determining the scrambled scan sequence by the gate driver according to a pseudo-random binary sequence.

12. The gate driving method as recited in claim 10 , wherein the gate lines are at least categorized into a first gate line group and a second gate line group, and the gate driving method further comprises:
determining the scrambled scan sequence of the first gate line group by the gate driver according to a first pseudo-random binary sequence; and
determining the scrambled scan sequence of the second gate line group by the gate driver according to a second pseudo-random binary sequence different from the first pseudo-random binary sequence.

13. The gate driving method as recited in claim 10 , further comprising:
determining the scrambled scan sequence by the gate driver according to a random number table.

14. The gate driving method as recited in claim 10 , wherein the gate lines are at least categorized into a first gate line group and a second gate line group, and the gate driving method further comprises:
determining the scrambled scan sequence of the first gate line group by the gate driver according to a first random number table; and
determining the scrambled scan sequence of the second gate line group by the gate driver according to a second random number table different from the first random number table.

15. The gate driving method as recited in claim 10 , further comprising:
determining the scrambled scan sequence in a first frame period by the gate driver according to a first random number table; and
determining the scrambled scan sequence in a second frame period by the gate driver according to a second random number table different from the first random number table.

16. The gate driving method as recited in claim 10 , further comprising:
obtaining a detection result by a timing controller detecting image data in a frame period; and
selecting a non-scrambled scan sequence or the scrambled scan sequence according to the detection result for driving the gate lines.

17. The gate driving method as recited in claim 10 , wherein the gate driver selects the scrambled scan sequence to drive the gate lines if a temperature of a source driver is within a high-temperature range, and the gate driver selects a non-scrambled scan sequence to drive the gate lines if the temperature of the source driver is within a low-temperature range.

18. The gate driving method as recited in claim 10 , wherein the gate driver selects the scrambled scan sequence to drive the gate lines if power consumption of a source driver is within a high-power range, and the gate driver selects a non-scrambled scan sequence to drive the gate lines if the power consumption of the source driver is within a low-power range.

Assignees

• Novatek Microelectronics Corp

Inventors

• Cheng Jhih-Siou
• Fang Po-Hsiang
• Tseng Po-Yu
• Lin Chieh-An
• Huang Ju-Lin
• Liu Yi-Chuan

Classifications

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G09G2330/025

  Reduction of instantaneous peaks of current · CPC title

• G09G2320/041

  Temperature compensation · CPC title

• G09G2310/067

  Special waveforms for scanning, where no circuit details of the gate driver are given · CPC title

• G09G3/3674 Primary

  Details of drivers for scan electrodes · CPC title