Charge-sharing controlling method and display panel

Patent metadata

Field	Value
Publication number	US-9607559-B2
Application number	US-201414496373-A
Country	US
Kind code	B2
Filing date	Sep 25, 2014
Priority date	Oct 18, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A charge-sharing controlling method and a display panel are disclosed. The charge-sharing controlling method is suitable for the display panel including plural sub-pixels. The charge-sharing controlling method includes following steps: determining whether the display panel is displaying a primary color screen; if the display panel is displaying a primary color screen, prolonging an activated time of a charge-sharing circuit, which is coupled between any two of the sub-pixels displaying the same color, adjacent to each other and having opposite polarities.

First claim

What is claimed is:

1. A charge-sharing controlling method, suitable for a display panel comprising a plurality of sub-pixels, the charge-sharing controlling method comprising:
determining whether the display panel is utilized to display a primary color screen; and
if the display panel is displaying the primary color screen, prolonging an activated time of a charge-sharing circuit, the charge-sharing circuit being coupled between any two of the sub-pixels displaying the same color, adjacent to each other and having opposite polarities;
if the display panel is not displaying the primary color screen, setting the activated time of the charge-sharing circuit at a first time length; and
if the display panel is displaying the primary color screen, setting the activated time of the charge-sharing circuit at a second time length, wherein the second time length is longer than the first time length;
wherein the first time length and the second time length are positively correlated to pixel capacitances of the sub-pixels, and also positively correlated to an operational voltage level on the display panel.

2. The charge-sharing controlling method of claim 1 , wherein, whether the display panel is utilized to display the primary color screen is determined by detecting whether the panel is utilized to display any one of a pure red (R) screen, a pure green (G) screen, a pure blue (B) screen, a pure cyan (GB) screen, a pure yellow (RG) screen or a pure magenta (RB) screen.

3. The charge-sharing controlling method of claim 1 , wherein a lower bound of the second time length is configured according to a required time for two of the sub-pixels with opposite polarities to reach a balanced level, and a upper bound of the second time length is configured in positively correlated to a displaying period of each display frame and in negatively correlated to a required charge time for a liquid crystal unit of the display panel.

4. The charge-sharing controlling method of claim 1 , wherein each of the sub-pixels adopts opposite polarities in a first display frame and in a second display frame subsequent to the first display frame.

5. The charge-sharing controlling method of claim 1 , wherein the display panel comprises a source driver circuit, the source driver circuit is utilized to activate the charge-sharing circuit when a timing control signal is configured at an active level, the charge-sharing controlling method comprises:
determining whether a data signal outputted from the source driver circuit is utilized to display the primary color screen on the display panel by the source driver circuit; and
if the data signal is utilized to display the primary color screen, adjusting the timing control signal for prolonging a time interval of the timing control signal at the active level.

6. The charge-sharing controlling method of claim 1 , wherein the display panel comprises a timing controller for generating a timing control signal, the timing control signal is utilized to activate the charge-sharing circuit when the timing control signal is configured at an active level, the timing controller receives a data signal, the charge-sharing controlling method comprises:
determining whether a data signal is utilized to display the primary color screen on the display panel by the timing controller; and
if the data signal is utilized to display the primary color screen, prolonging a time interval of the timing control signal at the active level by the timing controller.

7. A display panel, comprising:
a plurality of sub-pixels;
a charge-sharing circuit coupled between any two of the sub-pixels displaying the same color, adjacent to each other and having opposite polarities;
a timing controller, configured for generating a timing control signal, the charge-sharing circuit being activated when the timing control signal is configured at an active level; and
a source driver circuit, configured for generating a data signal for driving the sub-pixels, and the source driver circuit comprising:
a determining unit, configured for determining whether the data signal is utilized to display a primary color screen on the display panel; and
an adjusting unit, if the data signal is determined to be utilized to display the primary color screen, the adjusting unit triggering the timing controller to adjust the timing control signal, so as to prolong a time interval of the timing control signal at the active level;

wherein if the data signal is not determined to be utilized to display the primary color screen, the adjusting unit triggers the timing controller to adjust an activated time of the charge-sharing circuit at a first time length; and
if the data signal is determined to be utilized to display the primary color screen, the adjusting unit triggers the timing controller to adjust the activated time of the charge-sharing circuit at a second time length, wherein the second time length is longer than the first time length;
wherein the first time length and the second time length are positively correlated to pixel capacitances of the sub-pixels, and also positively correlated to an operational voltage level on the display panel.

8. A display panel, comprising:
a plurality of sub-pixels;
a charge-sharing circuit coupled between any two of the sub-pixels displaying the same color, adjacent to each other and having opposite polarities;
a source driver circuit, configured for generating a data signal for driving the sub-pixels; and
a timing controller, configured for generating a timing control signal, the charge-sharing circuit being activated when the timing control signal is configured at an active level, and the timing controller comprising:
a determining unit, configured for determining whether the data signal outputted from the source driver circuit is utilized to display a primary color screen on the display panel; and
an adjusting unit, if the data signal is determined to be utilized to display the primary color screen, the adjusting unit adjusting the timing control signal generated by the timing controller, so as to prolong a time interval of the timing control signal at the active level;
wherein if the data signal is not determined to be utilized to display the primary color screen, the adjusting unit adjusts an activated time of the charge-sharing circuit at a first time length; and
if the data signal is determined to be utilized to display the primary color screen, the adjusting unit adjusts the activated time of the charge-sharing circuit at a second time length, wherein the second time length is longer than the first time length;
wherein a lower bound of the second time length is configured according to a required time for two of the sub-pixels with opposite polarities to reach a balanced level, and a upper bound of the second time length is configured in positively correlated to a displaying period of each display frame and in negatively correlated to a required charge time for a liquid crystal unit of the display panel.

Assignees

• Au Optronics Corp

Inventors

• Wen Chun-Kuei
• Huang Yu-Ting
• Shih Hung-Min
• Su Tian-Hua

Classifications

• G09G3/3607 Primary

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• G09G2330/023

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• G09G3/3614

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