Liquid crystal cell and method for fabricating the same, liquid crystal display panel, and display device

• US 9,939,687 B2
• Filed: 11/28/2014
• Issued: 04/10/2018
• Est. Priority Date: 11/14/2014
• Status: Expired due to Fees

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zhu, Ming, Yang, Yafeng, Suzuki, Teruaki
• Primary Examiner(s): Merlin, Jessica M
• Assistant Examiner(s): TEETS, MARK D
• Application Number:
  US14/555,933
• Publication Number:
  US 20160139445A1
• Time in Patent Office: 1,229 Days
• Field of Search: None
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/13396 Spacers having different sizes
• CPC Class Codes: G02F 1/13398 Spacer materials; Spacer properties
• CPC Class Codes: G02F 2201/54 Arrangements for reducing warping-twist
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: G02F 2203/60 Temperature independent

Abstract

A liquid crystal cell and method for fabricating the same, a liquid crystal display panel, and a display device are disclosed. The liquid crystal cell comprises an active area and a dummy area, and comprises a first and second substrate which are arranged oppositely and separated by spacers, and liquid crystal arranged between the first and second substrate. The liquid crystal cell further comprises a volume variation compensating component which is arranged in the active area, and the volume variation compensating component comprises a material with a thermal expansion coefficient opposite to that of the liquid crystal, so as to compensate variation in the volume of liquid crystal when temperature varies. Not only defects of gravity mura at high temperature and bubbles at low temperature are eliminated to spread LC Margin, but also the scope of application environment for the liquid crystal display panel is expanded.

Claims

1. A liquid crystal cell, comprising an active area and a dummy area, and comprising a first and second substrate which are arranged oppositely and separated by spacers, and liquid crystal arranged between the first and second substrate,

wherein the liquid crystal cell further comprises a volume variation compensating component which is arranged in the active area, and the volume variation compensating component comprises a material with a thermal expansion coefficient opposite to that of the liquid crystal, wherein when the liquid crystal decreases in volume due to temperature variation, the volume variation compensating component increases in volume, or when the liquid crystal increases in volume due to temperature variation, the volume variation compensating component decreases in volume,

wherein the spacers are post spacers, and

wherein the spacers comprise main spacers and sub-spacers with a height smaller than that of the main spacers, and the volume variation compensating component forms the sub-spacers.

2. The liquid crystal cell of claim 1, wherein the volume variation compensating component further comprises fillers which are uniformly dispersed within the liquid crystal.

3. The liquid crystal cell of claim 2, wherein the fillers are nanospheres, nanowires, or nanotubes.

4. The liquid crystal cell of claim 1, wherein the volume variation compensating component further comprises a buffer belt which is arranged in the dummy area.

5. The liquid crystal cell of claim 4, wherein the buffer belt is arranged on the first substrate and/or the second substrate.

6. The liquid crystal cell of claim 1, wherein the volume variation compensating component comprises a material with a negative thermal expansion coefficient.

7. The liquid crystal cell of claim 6, wherein the negative thermal expansion coefficient material has an isotropic thermal expansion coefficient.

8. The liquid crystal cell of claim 7, wherein the negative thermal expansion coefficient material is selected from the group consisting of ZrW₂O₈, HfW₂O₈, ZrV₂O₇, and ThP₂O₇.

9. The liquid crystal cell of claim 1, wherein the first substrate is a color filter substrate, and the second substrate is an array substrate.

10. A display device, comprising the liquid crystal cell of claim 1.

11. The display device of claim 10, wherein the volume variation compensating component is fillers which are uniformly dispersed within the liquid crystal.

12. A method for fabricating a liquid crystal cell, comprising steps of:

providing a color filter substrate and an array substrate;

forming a volume variation compensating component in an active area, which comprises a material with a thermal expansion coefficient opposite to that of the liquid crystal, wherein when the liquid crystal decreases in volume due to temperature variation, the volume variation compensating component increases in volume, or when the liquid crystal increases in volume due to temperature variation, the volume variation compensating component decreases in volume; and

assembling the color filter substrate and the array substrate, and curing a frame sealant to form a liquid crystal cell,

wherein the step of forming the volume variation compensating component comprises;

forming main spacers and sub-spacers with a height smaller than that of the main spacers on the color filter substrate, wherein the volume variation compensating component forms the sub-spacers.

13. The method of claim 12, wherein the step of forming the volume variation compensating component further comprises:

uniformly dispersing fillers in the liquid crystal, and dropping the liquid crystal onto the array substrate.

14. The method of claim 12, further comprise:

in a dummy area, forming the volume variation compensating component as a buffer belt on the color filter substrate and/or the array substrate.