LIQUID CRYSTAL DISPLAY PANEL

• US 20180052342A1
• Filed: 12/29/2016
• Published: 02/22/2018
• Est. Priority Date: 08/17/2016
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: CHANG, Wan-Heng, FAN, Chen-Feng, LIN, Rong-Fu, SU, Sung-Yu, CHENG, Hsiao-Wei
• Granted Patent: US 10,216,017 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/1323 Arrangements for providing a switchable viewing angle
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133531 characterised by the arrangement of polariser or analyser axes
• CPC Class Codes: G02F 1/1337 Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/13471 in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells G02F1/13475 takes precedence
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel

Abstract

A liquid crystal display panel includes a first substrate, a second substrate, a third substrate, a pixel electrode layer, a first common electrode layer, a first control electrode layer, a first liquid crystal layer, a second common electrode layer, a second control electrode layer and a second liquid crystal layer. The second substrate is opposite to the first substrate. The third substrate is opposite to the second substrate. The pixel electrode layer and the first common electrode layer are disposed on the first substrate. The first control electrode layer is disposed on the second substrate. The first liquid crystal layer is disposed between the first substrate and the second substrate. The second common electrode layer is disposed on the second substrate. The second control electrode layer is disposed on the third substrate. The second liquid crystal layer is disposed between the second substrate and the third substrate.

Claims

1. A liquid crystal display panel, comprising:

a first substrate;

a second substrate disposed opposite to the first substrate, wherein the second substrate has a first surface and a second surface, and the first surface faces the first substrate;

a third substrate disposed opposite to the second substrate, wherein the second substrate is located between the first substrate and the third substrate;

a pixel electrode layer disposed on the first substrate;

a first common electrode layer disposed on the first substrate;

a first control electrode layer disposed on the second substrate;

a first liquid crystal layer disposed between the first substrate and the second substrate, wherein the first liquid crystal layer comprises a plurality of first liquid crystal molecules, and the first liquid crystal molecules being adjacent to the first substrate and the first liquid crystal molecules being adjacent to the second substrate are aligned along a first direction;

a second common electrode layer disposed on the second substrate;

a second control electrode layer disposed on the third substrate; and

a second liquid crystal layer disposed between the second substrate and the third substrate, wherein the second liquid crystal layer comprises a plurality of second liquid crystal molecules, the second liquid crystal molecules being adjacent to the second substrate and the second liquid crystal molecules being adjacent to the third substrate are aligned along a second direction, and the second direction is not parallel to the first direction.

2. The liquid crystal display panel according to claim 1, wherein the first direction is perpendicular to the second direction.

3. The liquid crystal display panel according to claim 1, further comprising:

a first polarizer, wherein the first substrate is located between the second substrate and the first polarizer, and a polarization axis of the first polarizer is parallel to or perpendicular to the first direction; and

a second polarizer, wherein the third substrate is located between the second substrate and the second polarizer, and a polarization axis of the second polarizer is perpendicular to the polarization axis of the first polarizer.

4. The liquid crystal display panel according to claim 1, wherein the first liquid crystal molecules and the second liquid crystal molecules are with positive dielectric anisotropy.

5. The liquid crystal display panel according to claim 1, wherein when the liquid crystal display panel is in a wide viewing angle mode, a first potential difference between the first common electrode layer and the first control electrode layer is about 0 volts to 5 volts, and a second potential difference between the second common electrode layer and the second control electrode layer is about 0 volts.

6. The liquid crystal display panel according to claim 5, wherein when the liquid crystal display panel is in a first narrow viewing angle mode, a third potential difference between the first common electrode layer and the first control electrode layer is about 0 volts to 10 volts, and a fourth potential difference between the second common electrode layer and the second control electrode layer is about 0 volts.

7. The liquid crystal display panel according to claim 6, wherein the third potential difference is greater than the first potential difference.

8. The liquid crystal display panel according to claim 5, wherein when the liquid crystal display panel is in a second narrow viewing angle mode, a fifth potential difference between the first common electrode layer and the first control electrode layer is about 0 volts to 5 volts, and a sixth potential difference between the second common electrode layer and the second control electrode layer is about 0 volts to 10 volts.

9. The liquid crystal display panel according to claim 5, wherein when the liquid crystal display panel is in a third narrow viewing angle mode, a seventh potential difference between the first common electrode layer and the first control electrode layer is about 0 volts to 10 volts, and an eighth potential difference between the second common electrode layer and the second control electrode layer is about 0 volts to 10 volts.

10. The liquid crystal display panel according to claim 9, wherein the seventh potential difference is greater than the first potential difference.

11. The liquid crystal display panel according to claim 1, wherein the second control electrode layer comprises a plurality of second control electrodes.

12. The liquid crystal display panel according to claim 11, wherein the second control electrodes are respectively electrically connected to a plurality of touch control signal lines, and the touch control signal lines are configured to respectively transmit touch control signals to the second control electrodes and to respectively provide voltages to the second control electrodes.

13. The liquid crystal display panel according to claim 12, wherein the second control electrodes and the second common electrode layer have different potentials.

14. The liquid crystal display panel according to claim 1, further comprising:

a first alignment layer disposed on a surface of the first substrate facing the second substrate; and

a second alignment layer disposed on the first surface of the second substrate.

15. The liquid crystal display panel according to claim 1, further comprising:

a third alignment layer disposed on the second surface of the second substrate; and

a fourth alignment layer disposed on a surface of the third substrate facing the second substrate.

16. The liquid crystal display panel according to claim 1, further comprising an insulation layer disposed between the pixel electrode layer and the first common electrode layer.

17. A liquid crystal display panel, comprising:

a liquid crystal panel with a horizontal electric field, comprising a first control electrode layer, a first liquid crystal layer, and a pixel electrode layer, wherein the first liquid crystal layer is located between the pixel electrode layer and the first control electrode layer;

an opposite substrate; and

a second liquid crystal layer, wherein the second liquid crystal layer is located between the liquid crystal panel and the opposite substrate.