Blue phase liquid crystal display panel

• US 9,958,740 B2
• Filed: 07/16/2015
• Issued: 05/01/2018
• Est. Priority Date: 06/30/2015
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Tang, Yuejun
• Primary Examiner(s): Green, Tracie Y
• Application Number:
  US14/778,237
• Publication Number:
  US 20170139287A1
• Time in Patent Office: 1,020 Days
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• 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 1/134381 Hybrid switching mode, i.e. for applying an electric field with components parallel and orthogonal to the substrates
• CPC Class Codes: G02F 1/13793 Blue phases
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel

Abstract

Disclosed is a blue phase liquid crystal display panel which includes an upper substrate and a lower substrate which are disposed opposite to each other, and blue phase liquid crystals provided between the upper substrate and the lower substrate. The upper substrate is provided with a first common electrode on a side facing the blue phase liquid crystals, and the lower substrate is provided with a second common electrode and a plurality of pixel electrodes on a side facing the blue phase liquid crystals. The pixel electrodes each extend towards the first common electrode, thus forming a horizontal electric field between the upper substrate and the lower substrate. According to the present disclosure, higher horizontal field intensity can be achieved so that the external drive voltage of the blue phase liquid crystals can be greatly decreased.

Claims

1. A blue phase liquid crystal display panel, comprising:

an upper substrate and a lower substrate which are disposed opposite to each other, and

blue phase liquid crystals provided between the upper substrate and the lower substrate,

wherein the upper substrate is provided with a first common electrode on a side facing the blue phase liquid crystals, and the lower substrate is provided with a second common electrode and a plurality of pixel electrodes on a side facing the blue phase liquid crystals,

wherein the pixel electrodes each extend towards the first common electrode, forming a horizontal electric field between the upper substrate and the lower substrate,

wherein the pixel electrodes each are provided with an insulating layer at an end facing the first common electrode, and

wherein the extending length of the pixel electrode is larger than or equal to half of the distance between the upper substrate and the lower substrate, and is smaller than the distance between the upper substrate and the lower substrate.

2. The blue phase liquid crystal display panel according to claim 1, wherein the first common electrode completely covers the upper substrate, and the second common electrode completely covers the lower substrate, the pixel electrodes each extending from the second common electrode in an insulating manner.

3. The blue phase liquid crystal display panel according to claim 2, wherein a third common electrode is provided between two neighboring pixel electrodes, the third common electrode extending from the second common electrode to the first common electrode.

4. The blue phase liquid crystal display panel according to claim 3, wherein the third common electrode is provided with an insulating layer at an end facing the first common electrode.

5. The blue phase liquid crystal display panel according to claim 1, wherein the first common electrode completely covers the upper substrate, and the second common electrode comprises a plurality of second sub-common electrodes which are arranged at intervals on the lower substrate, the pixel electrodes each being arranged in a region between two neighboring second sub-common electrodes on the lower substrate.

6. The blue phase liquid crystal display panel according to claim 1, wherein the second common electrode completely covers the lower substrate, and the first common electrode comprises a plurality of first sub-common electrodes which are arranged at intervals on the upper substrate, the pixel electrodes each extending from the second common electrode to a region between two neighboring first sub-common electrodes in an insulating manner.

7. The blue phase liquid crystal display panel according to claim 1, wherein the first common electrode comprises a plurality of first sub-common electrodes which are arranged at intervals on the upper substrate, and the second common electrode comprises a plurality of second sub-common electrodes which are arranged at intervals on the lower substrate, the pixel electrodes each being arranged in a region between two neighboring second sub-common electrodes on the lower substrate.

8. The blue phase liquid crystal display panel according to claim 7, wherein the first sub-common electrode completely corresponds to the second sub-common electrode.