DRIVING METHOD OF LIQUID CRYSTAL DISPLAY PANEL

• US 20180059458A1
• Filed: 02/26/2016
• Published: 03/01/2018
• Est. Priority Date: 02/01/2016
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Chen, Lixuan
• Granted Patent: US 9,995,952 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/13306 Circuit arrangements or driving methods for the control of single liquid crystal cells G02F1/132, G02F1/133382 take precedence
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2300/0495 Use of transitions between isotropic and anisotropic phases in liquid crystals, by voltage controlled deformation of the liquid crystal molecules, as opposed to merely changing the orientation of the molecules as in, e.g. twisted-nematic [TN], vertical-aligned [VA], cholesteric, in-plane, or bi-refringent liquid crystals
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3622 using a passive matrix G09G3/3674 - G09G3/3696 take precedence

Abstract

Disclosed is a driving method of a liquid crystal display panel. Area division is implemented to obtain at least three division areas for individually providing a compensation signal voltage to each division area according to the difference of the actual brightnesses and the target brightnesses, and with the compensation signal voltage, implementing enhancement to a data signal voltage corresponded with a sub pixel, of which a difference of the data signal voltage (V+) in a positive polarity driving cycle or the data signal voltage (V−) in a negative polarity driving cycle and the common voltage (VCOM) is smaller, and implementing abatement to a data signal voltage corresponded with a sub pixel, of which a difference of the data signal voltage (V+) in the positive polarity driving cycle or the data signal voltage (V−) in the negative polarity driving cycle and the common voltage (VCOM) is larger.

Claims

1. A driving method of a liquid crystal display panel, comprising steps of:

step 1, providing a liquid crystal display panel;

the liquid crystal display panel comprises a plurality of pixel units aligned in array, and each pixel unit comprises a red sub pixel unit, a green sub pixel unit and a blue sub pixel unit;

the green sub pixel is an integrated structure, and at least one of the red sub pixel unit and the blue sub pixel unit is divided into two parts, a main region and a sub region;

step 2, implementing area division to the liquid crystal display panel to obtain at least three division areas;

step 3, activating the liquid crystal display panel to provide theoretical data signal voltages and the same common voltage to the respective division areas of the liquid crystal display panel to compare differences of actual brightnesses of the respective division areas and target brightnesses under the theoretical data signal voltages;

step 4, individually providing a compensation signal voltage to each division area according to the difference of the actual brightnesses and the target brightnesses of the respective division areas of the liquid crystal display panel, and in each division area of the liquid crystal display panel, with the compensation signal voltage, implementing enhancement to a data signal voltage corresponded with a sub pixel, of which a difference of the data signal voltage in a positive polarity driving cycle or the data signal voltage in a negative polarity driving cycle and the common voltage is smaller, and implementing abatement to a data signal voltage corresponded with a sub pixel, of which a difference of the data signal voltage in the positive polarity driving cycle or the data signal voltage in the negative polarity driving cycle and the common voltage is larger.

2. The driving method of the liquid crystal display panel according to claim 1, wherein in the step 1, only the blue sub pixel unit is divided into the two parts, the main region and the sub region.

3. The driving method of the liquid crystal display panel according to claim 1, wherein in the step 1, only the red sub pixel unit is divided into the two parts, the main region and the sub region.

4. The driving method of the liquid crystal display panel according to claim 1, wherein in the step 1, the blue sub pixel unit is divided into the two parts, the main region and the sub region, and the red sub pixel unit is also divided into the two parts, the main region and the sub region.

5. The driving method of the liquid crystal display panel according to claim 1, wherein in the step 2, according to a position corresponded with a source drive IC in the liquid crystal display panel, the area division is implemented to the liquid crystal display panel to obtain at least three division areas.

6. The driving method of the liquid crystal display panel according to claim 1, wherein in the step 2, the area division is implemented to the liquid crystal display panel along a horizontal direction to obtain at least three division areas.

7. The driving method of the liquid crystal display panel according to claim 6, wherein the step 2 further comprises separately selecting one reference sub pixel in each division area, and in the step 3, comparing differences of actual brightnesses of the reference sub pixels in the respective division areas and the target brightnesses under the theoretical data signal voltages to compare the differences of the actual brightnesses of the respective division areas and the target brightnesses under the theoretical data signal voltages.

8. The driving method of the liquid crystal display panel according to claim 7, wherein a distance a between the reference sub pixel and a left frame or a right frame of the liquid crystal display panel is:

0.1×

L<

a<

0.4×

L, and L is a width of the liquid crystal display panel;

a distance b between the reference sub pixel and a top frame or a bottom frame of the liquid crystal display panel is;

0.2×

H<

b<

0.7×

H, and H is a height of the liquid crystal display panel.

9. The driving method of the liquid crystal display panel according to claim 1, wherein the sub pixel of the integrated structure comprises an integrated pixel electrode of a pozidriv structure;

in the sub pixel divided with the two parts, the main region and the sub region, wherein the main region comprises a main region pixel electrode of a pozidriv structure, and the sub region comprises a sub region pixel electrode of a pozidriv structure.

10. A driving method of a liquid crystal display panel, comprising steps of:

step 1, providing a liquid crystal display panel;

the liquid crystal display panel comprises a plurality of pixel units aligned in array, and each pixel unit comprises a red sub pixel unit, a green sub pixel unit and a blue sub pixel unit;

the green sub pixel is an integrated structure, and at least one of the red sub pixel unit and the blue sub pixel unit is divided into two parts, a main region and a sub region;

step 2, implementing area division to the liquid crystal display panel to obtain at least three division areas;

step 3, activating the liquid crystal display panel to provide theoretical data signal voltages and the same common voltage to the respective division areas of the liquid crystal display panel to compare differences of actual brightnesses of the respective division areas and target brightnesses under the theoretical data signal voltages;

step 4, individually providing a compensation signal voltage to each division area according to the difference of the actual brightnesses and the target brightnesses of the respective division areas of the liquid crystal display panel, and in each division area of the liquid crystal display panel, with the compensation signal voltage, implementing enhancement to a data signal voltage corresponded with a sub pixel, of which a difference of the data signal voltage in a positive polarity driving cycle or the data signal voltage in a negative polarity driving cycle and the common voltage is smaller, and implementing abatement to a data signal voltage corresponded with a sub pixel, of which a difference of the data signal voltage in the positive polarity driving cycle or the data signal voltage in the negative polarity driving cycle and the common voltage is larger;

wherein in the step 1, only the blue sub pixel unit is divided into the two parts, the main region and the sub region;

wherein in the step 2, the area division is implemented to the liquid crystal display panel along a horizontal direction to obtain at least three division areas;

wherein the sub pixel of the integrated structure comprises an integrated pixel electrode of a pozidriv structure;

in the sub pixel divided with the two parts, the main region and the sub region, wherein the main region comprises a main region pixel electrode of a pozidriv structure, and the sub region comprises a sub region pixel electrode of a pozidriv structure.

11. The driving method of the liquid crystal display panel according to claim 10, wherein the step 2 further comprises separately selecting one reference sub pixel in each division area, and in the step 3, comparing differences of actual brightnesses of the reference sub pixels in the respective division areas and the target brightnesses under the theoretical data signal voltages to compare the differences of the actual brightnesses of the respective division areas and the target brightnesses under the theoretical data signal voltages.

12. The driving method of the liquid crystal display panel according to claim 11, wherein a distance a between the reference sub pixel and a left frame or a right frame of the liquid crystal display panel is:

0.1×

L<

a<

0.4×

L, and L is a width of the liquid crystal display panel;

a distance b between the reference sub pixel and a top frame or a bottom frame of the liquid crystal display panel is;

0.2×

H<

b<

0.7×

H, and H is a height of the liquid crystal display panel.