Curved display device and display panel thereof

• US 10,459,296 B2
• Filed: 03/02/2018
• Issued: 10/29/2019
• Est. Priority Date: 12/27/2017
• 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: Yin, Bingkun, Yin, Wanting, Tan, Cong, Shen, Hung-ming
• Primary Examiner(s): Duong, Thoi V
• Application Number:
  US15/910,600
• Publication Number:
  US 20190196241A1
• Time in Patent Office: 606 Days
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• 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 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence

Abstract

The present invention provides a curved display device and a display panel thereof. The display panel includes a CF substrate, a TFT substrate, a plurality of photo spacers, a liquid crystal layer and a sealing layer. The liquid crystal layer is located between the CF and the TFT substrates, the plurality of photo spacers is disposed on a surface of the CF substrate facing the TFT substrate, the sealing layer is disposed between the CF and the TFT substrates and surrounds an edge of the liquid crystal layer, the liquid crystal layer includes an intermediate region and two edge regions located at two sides of the intermediate region, a stress generated from the photo spacers located in the intermediate region on the liquid crystals in the intermediate region is smaller than that generated from the photo spacers located in the edge regions on the liquid crystals in the edge regions.

Claims

1. A display panel, comprising a color filter, CF substrate, a thin film transistor, TFT substrate, a plurality of photo spacers, a liquid crystal layer and a sealing layer, wherein the liquid crystal layer is disposed between the CF substrate and the TFT substrate, the plurality of photo spacers is disposed on a surface of the CF substrate facing the TFT substrate, the sealing layer is disposed between the CF substrate and the TFT substrate and surrounds an edge of the liquid crystal layer, the liquid crystal layer comprises an intermediate region and two edge regions located at two sides of the intermediate region, a stress generated from the photo spacers located in the intermediate region on the liquid crystals in the intermediate region is smaller than the stress generated from the photo spacers located in the edge regions on the liquid crystals in the edge regions, to keep the CF substrate and the TFT substrate at a constant gap;

wherein the photo spacers located in the two edge regions are symmetrical to the intermediate region, the photo spacers located in the intermediate region are symmetrical to a central axis of the CF substrate; and

wherein the density of the photo spacers located in the intermediate region gradually increases in a direction from the intermediate region to the edge region, and the density of the photo spacers located in the edge region gradually increases in a direction from the intermediate region to the edge region.

2. The display panel according to claim 1, wherein heights of the photo spacers in the intermediate region are smaller than the heights of the photo spacers in the edge region.

3. The display panel according to claim 2, wherein heights of the photo spacers located in the intermediate region gradually increase in a direction from the intermediate region to the edge region.

4. The display panel according to claim 3, wherein heights of the photo spacers located in the edge region gradually increase in a direction from the intermediate region to the edge region.

5. The display panel according to claim 2, wherein heights of the photo spacers located in the edge region gradually increase in a direction from the intermediate region to the edge region.

6. The display panel according to claim 1, wherein a maximum length in the direction parallel to the CF substrate of the photo spacers in the intermediate region is smaller than the maximum length in the direction parallel to the CF substrate of the photo spacers located in the edge region.

7. The display panel according to claim 6, wherein the maximum length in the direction parallel to the CF substrate of the photo spacers located in the intermediate region gradually increases in a direction from the intermediate region to the edge region, and/or the maximum length in the direction parallel to the CF substrate of the photo spacers located in the edge region gradually increases in a direction from the intermediate region to the edge region.

8. A curved display device, comprising a display panel, wherein the display panel comprises a color filter, CF substrate, a thin film transistor, TFT substrate, a plurality of photo spacers, a liquid crystal layer and a sealing layer, the liquid crystal layer is disposed between the CF substrate and the TFT substrate, the plurality of photo spacers is disposed on a surface of the CF substrate facing the TFT substrate, the sealing layer is disposed between the CF substrate and the TFT substrate and surrounds an edge of the liquid crystal layer, the liquid crystal layer comprises an intermediate region and two edge regions located at two sides of the intermediate region, a stress generated from the photo spacers located in the intermediate region on the liquid crystals in the intermediate region is smaller than the stress generated from the photo spacers located in the edge regions on the liquid crystals in the edge regions, to keep the CF substrate and the TFT substrate at a constant gap;

wherein the photo spacers located in the two edge regions are symmetrical to the intermediate region, the photo spacers located in the intermediate region are symmetrical to a central axis of the CF substrate; and

wherein the density of the photo spacers located in the intermediate region gradually increases in a direction from the intermediate region to the edge region, and the density of the photo spacers located in the edge region gradually increases in a direction from the intermediate region to the edge region.

9. The curved display device according to claim 8, wherein heights of the photo spacers in the intermediate region are smaller than the heights of the photo spacers in the edge region.

10. The curved display device according to claim 9, wherein heights of the photo spacers located in the intermediate region gradually increase in a direction from the intermediate region to the edge region.

11. The curved display device according to claim 10, wherein heights of the photo spacers located in the edge region gradually increase in a direction from the intermediate region to the edge region.

12. The curved display device according to claim 9, wherein heights of the photo spacers located in the edge region gradually increase in a direction from the intermediate region to the edge region.

13. The curved display device according to claim 8, wherein a maximum length in the direction parallel to the CF substrate of the photo spacers in the intermediate region is smaller than the maximum length in the direction parallel to the CF substrate of the photo spacers located in the edge region.

14. The curved display device according to claim 13, wherein the maximum length in the direction parallel to the CF substrate of the photo spacers located in the intermediate region gradually increases in a direction from the intermediate region to the edge region, and/or the maximum length in the direction parallel to the CF substrate of the photo spacers located in the edge region gradually increases in a direction from the intermediate region to the edge region.