Display device

• US 10,545,362 B2
• Filed: 05/31/2018
• Issued: 01/28/2020
• Est. Priority Date: 08/23/2017
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Hefei Boe Display Lighting Co., Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zhang, Qiping, Sun, Wenbo
• Primary Examiner(s): Liu, Shan
• Application Number:
  US15/994,288
• Publication Number:
  US 20190064586A1
• Time in Patent Office: 607 Days
• Field of Search: 349 58- 65, 349122
• CPC Class Codes: G02B 6/0025 Diffusing sheet or layer; Prismatic sheet or layer
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133311 Environmental protection, e.g. against dust or humidity
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 2201/54 Arrangements for reducing warping-twist
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

The disclosure discloses a display device. The display device with a display area, and a bezel area surrounding the display area includes a back plate, and a light guiding plate and an optical film arranged above the back plate in that order, wherein a display panel is further arranged above the optical film, and the display panel is supported and fixed by a frame arranged above the back plate, and located on a periphery of the light guiding plate and the optical film; and there is an adhesive coating layer arranged on such a part of a surface of the optical film facing the display panel that overlaps with the bezel area, and an adhesion coefficient of an adhesive material of the adhesive coating layer reduces as a temperature rises.

Claims

1. A display device with a display area, and a bezel area surrounding the display area, wherein the display device comprises a back plate, and a light guiding plate and an optical film arranged above the back plate in that order, wherein a display panel is further arranged above the optical film, and the display panel is supported and fixed by a frame arranged above the back plate and located on a periphery of the light guiding plate and the optical film;

and

a surface of the optical film facing the display panel is arranged with an adhesive coating layer at a part that overlaps with the bezel area, and wherein an adhesion coefficient of an adhesive material of the adhesive coating layer is reduced as a temperature rises,

wherein a side light source is arranged in a sub-bezel area on a side of the display device, and the adhesive coating layer is arranged in sub-bezel areas of the display device other than a sub-bezel area opposite to the sub-bezel area where the side light source is located;

wherein a shading tape is affixed throughout the bezel area on a surface of the display panel facing the optical film, and a surface of the adhesive coating layer facing away from the optical film comes into contact with the shading tape; and

wherein a first edge of the shading tape is a single sided adhesive member and having a surface without any adhesive facing the display panel, and edges of the shading tape other than the first edge are double sided adhesive members having a part directly adhered to the display panel and the adhesive coating layer and another part directly adhered to the display panel and the frame, and wherein the first edge of the shading tape is an edge of the shading tape in the sub-bezel area where the side light source is located.

2. The display device according to claim 1, wherein a gap area is located between the optical film and the frame, and the adhesive coating layer extends to the gap area.

3. The display device according to claim 1, wherein the display panel comprises:

an array substrate and a color filter substrate arranged opposite to each other, a lower polarizer arranged on a surface of the array substrate facing away from the color filter substrate, and an upper polarizer arranged on a surface of the color filter substrate facing away from the array substrate, and a surface of the array substrate facing the lower polarizer has a first part that overlaps with the lower polarizer in the bezel area, and a second part that does not overlap with the lower polarizer in the bezel area; and

wherein, the shading tape has a first part in contact with the second part of the array substrate that does not overlap with the lower polarizer, and a second part in contact with the lower polarizer.

4. The display device according to claim 1, wherein a material of the adhesive coating layer is melamine formaldehyde resin.

5. The display device according to claim 1, wherein the optical film comprises a lower diffusion sheet, and a lower light enhancement sheet, an upper light enhancement sheet, and an upper diffusion sheet arranged above the lower diffusion sheet in that order, and the upper diffusion sheet comes into contact with the adhesive coating layer.

6. The display device according to claim 1, wherein a reflection sheet is further arranged between the light guiding plate and the back plate.

7. The display device according to claim 1, wherein the back plate is a U-shaped back plate.