LIQUID CRYSTAL DISPLAY AND DISPLAY DEVICE

• US 20160033827A1
• Filed: 06/03/2014
• Published: 02/04/2016
• Est. Priority Date: 12/19/2013
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: WANG, Haiyan, UM, Yoonsung, WANG, Xiaolin
• Granted Patent: US 9,658,497 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode

Abstract

The present invention discloses a liquid crystal display panel and a display device. A capacitance compensation portion is arranged using a shading region, and the capacitance compensation portion is arranged opposite to a portion of a common electrode located within the shading region. Compared to the case where a common electrodes and a pixel electrode are overlapped only in a light transmitting region, the present invention enlarges the overlap area of the pixel electrode and the common electrode in the shading region, compensates the storage capacitance between the pixel electrode and the common electrode, and reduces the voltage difference before and after jump of the voltage of the pixel electrode, and improves the flicker of a liquid crystal display panel. Moreover, as the capacitance compensation portions additionally provided in the pixel electrodes are located within the shading region, the aperture rate of pixel regions will not be influenced.

Claims

1. A liquid crystal display panel, having a plurality of pixel regions arranged in an array, each of the pixel regions being divided into a light transmitting region and a shading region, each of the pixel regions being provided with a common electrode and a pixel electrode, wherein

within at least one of the pixel regions, the pixel electrode has a capacitance compensation portion which is located within the shading region and arranged opposite to a portion of the common electrode located within the shading region.

2. The liquid crystal display panel according to claim 1, comprising an opposite substrate, an array substrate, a liquid crystal layer located between the opposite substrate and the array substrate, a first polarizer located on one side of the opposite substrate back away from the liquid crystal layer, and a second polarizer located on one side of the array substrate back away from the liquid crystal layer, wherein

the liquid crystal layer consists of positive liquid crystal molecules, and a direction of a long axis of the positive liquid crystal molecules at an initial state is parallel to the opposite substrate and the array substrate;

or, the liquid crystal layer consists of negative liquid crystal molecules, and a direction of a short axis of the negative liquid crystal molecules at an initial state is parallel to the opposite substrate and the array substrate;

the pixel electrode is located on one side of the array substrate facing the liquid crystal layer; and

the common electrode is located on one side of the array substrate or the opposite substrate facing the liquid crystal layer.

3. The liquid crystal display panel according to claim 2, wherein a direction of a light transmitting axis of the first polarizer is vertical to a direction of a light transmitting axis of the second polarizer.

4. The liquid crystal display panel according to claim 3, wherein in the case of the liquid crystal layer consisting of positive liquid crystal molecules, within two adjacent pixel regions, an angle formed by projections of two adjacent edges of the capacitance compensation portions of the pixel electrodes on the array substrate and a projection of the long axis of the positive liquid crystal molecules on the array substrate is greater than 0°

;

or

in the case of the liquid crystal layer consisting of negative liquid crystal molecules, within two adjacent pixel regions, an angle formed by projections of two adjacent edges of the capacitance compensation portions of the pixel electrodes on the array substrate and a projection of the short axis of the negative liquid crystal molecules on the array substrate is greater than 0°

.

5. The liquid crystal display panel according to claim 4, wherein in the case of the liquid crystal layer consisting of positive liquid crystal molecules, within two adjacent pixel regions, the projections of two adjacent edges of the capacitance compensation portions of the pixel electrodes on the array substrate are vertical to the projection of the long axis of the positive liquid crystal molecules on the array substrate;

or

in the case of the liquid crystal layer consisting of negative liquid crystal molecules, within two adjacent pixel regions, the projections of two adjacent edges of the capacitance compensation portions of the pixel electrodes on the array substrate are vertical to the projection of the short axis of the negative liquid crystal molecules on the array substrate.

6. The liquid crystal display panel according to claim 2, wherein a direction of the light transmitting axis of the first polarizer is parallel to a direction of the light transmitting axis of the second polarizer.

7. The liquid crystal display panel according to claim 6, wherein in the case of the liquid crystal layer consisting of positive liquid crystal molecules, within two adjacent pixel regions, the angle formed by projections of two adjacent edges of the capacitance compensation portions of the pixel electrodes on the array substrate and a projection of the long axis of the positive liquid crystal molecules on the array substrate is greater than or equal to 0°

but less than 90°

;

or

in the case of the liquid crystal layer consisting of negative liquid crystal molecules, within two adjacent pixel regions, the angle formed by projections of two adjacent edges of the capacitance compensation portions of the pixel electrodes on the array substrate and a projection of the short axis of the negative liquid crystal molecules on the array substrate is greater than or equal to 0°

but less than 90°

.

8. The liquid crystal display panel according to claim 7, wherein in the case of the liquid crystal layer consisting of positive liquid crystal molecules, within two adjacent pixel regions, the projections of two adjacent edges of the capacitance compensation portions of the pixel electrodes on the array substrate are parallel to the projection of the long axis of the positive liquid crystal molecules on the array substrate;

or

in the case of the liquid crystal layer consisting of negative liquid crystal molecules, within two adjacent pixel regions, the projections of two adjacent edges of the capacitance compensation portions of the pixel electrodes on the array substrate are parallel to the projection of the short axis of the negative liquid crystal molecules on the array substrate.

11. The liquid crystal display panel according to claim 1, wherein within two adjacent pixel regions, two adjacent edges of the capacitance compensation portions of the pixel electrodes have complementary patterns.

12. The liquid crystal display panel according to claim 2, wherein within two adjacent pixel regions, two adjacent edges of the capacitance compensation portions of the pixel electrodes have complementary patterns.

13. The liquid crystal display panel according to claim 3, wherein within two adjacent pixel regions, two adjacent edges of the capacitance compensation portions of the pixel electrodes have complementary patterns.

14. The liquid crystal display panel according to claim 4, wherein within two adjacent pixel regions, two adjacent edges of the capacitance compensation portions of the pixel electrodes have complementary patterns.

15. The liquid crystal display panel according to claim 5, wherein within two adjacent pixel regions, two adjacent edges of the capacitance compensation portions of the pixel electrodes have complementary patterns.

16. The liquid crystal display panel according to claim 6, wherein within two adjacent pixel regions, two adjacent edges of the capacitance compensation portions of the pixel electrodes have complementary patterns.

17. The liquid crystal display panel according to claim 7, wherein within two adjacent pixel regions, two adjacent edges of the capacitance compensation portions of the pixel electrodes have complementary patterns.

18. The liquid crystal display panel according to claim 8, wherein within two adjacent pixel regions, two adjacent edges of the capacitance compensation portions of the pixel electrodes have complementary patterns.

9-10. -10. (canceled)

19. A display device, comprising a liquid crystal display panel,

the liquid crystal display panel having a plurality of pixel regions arranged in an, each of the pixel regions being divided into a light transmitting region and a shading region, each of the pixel regions being provided with a common electrode and a pixel electrode, wherein

within at least one of the pixel regions, the pixel electrode has a capacitance compensation portion which is located within the shading region and arranged opposite to a portion of the common electrode located within the shading region.