Display panel and method for narrowing edges and increasing edge strength thereof

Patent metadata

Field	Value
Publication number	US-9720268-B2
Application number	US-201414473213-A
Country	US
Kind code	B2
Filing date	Aug 29, 2014
Priority date	Jul 30, 2009
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

An edge narrowing method for a display panel is disclosed. The method includes the steps of providing the display panel, a grinding apparatus and a polishing apparatus; tilting the display panel so that the first substrate and a grinding member of the grinding apparatus have a first grinding angle therebetween; grinding the first substrate and the light-shielding area with the grinding apparatus while the display panel is tilted at the first grinding angle, thereby forming a first grinding end surface; stopping grinding of the first substrate and the light-shielding area when the width of the light-shielding area is between 0.35 and 1 mm; and polishing the first grinding end surface with the polishing apparatus to form a first end surface.

First claim

What is claimed is:

1. A method for narrowing edges of a display panel, the display panel comprising a first substrate, a second substrate, a sealant and a light-shielding area, the sealant being disposed between the first substrate and the second substrate, the light-shielding area being disposed between the sealant and the first substrate, the method comprising:
providing the display panel;
tilting the display panel so that the first substrate of the display panel and a horizontal plane form a first tilt angle therebetween;
grinding the first substrate and the light-shielding area to form a first grinding end surface on the first substrate and the light-shielding area while the display panel is tilted at the first tilt angle; and
polishing the first grinding end surface to form a first end surface;
wherein an arithmetic average roughness Ra of the first end surface is between 0.001 and 0.04 μm, and a maximum roughness height Ry of the first end surface is between approximately 0.1 and 0.5 μm.

2. The method of claim 1 , further comprising:
grinding the second substrate or the sealant while the display panel is tilted at the first tilt angle.

3. The method of claim 1 , further comprising:
tilting the display panel so that the second substrate and the horizontal plane form a second tilt angle therebetween.

4. The method of claim 3 , further comprising:
grinding the second substrate to form a second grinding end surface on the second substrate while the display panel is tilted at the second tilt angle.

5. The method of claim 4 , further comprising:
grinding the sealant and a portion of the second substrate while the display panel is tilted at the first tilt angle.

6. The method of claim 5 , wherein the first grinding end surface goes from the first substrate, the light-shielding area, and the sealant to the portion of the second substrate, and the second grinding end surface comprises another portion of the second substrate.

7. The method of claim 4 , further comprising:
grinding the sealant and a portion of the first substrate while the display panel is tilted at the second tilt angle.

8. The method of claim 4 , wherein the second grinding end surface goes from the second substrate, the sealant, and the light-shielding area to a portion of the first substrate.

9. The method of claim 3 , further comprising:
grinding the sealant while the display panel is tilted at the second tilt angle.

10. The method of claim 4 , further comprising:
polishing the second grinding end surface to form a second end surface, wherein an arithmetic average roughness Ra of the second end surface is between 0.001 and 0.04 μm, and a maximum roughness height Ry of the second end surface is between approximately 0.1 and 0.5 μm.

11. A method for increasing edge strength of a display panel, the display panel comprising a first substrate, a second substrate and a sealant, the sealant being disposed between the first substrate and the second substrate, the method comprising:
providing the display panel;
tilting the display panel so that the second substrate of the display panel and a horizontal plane form a tilt angle;
grinding the second substrate to form a grinding end surface on the second substrate while the display panel is tilted at the tilt angle; and
polishing the grinding end surface to form an end surface, wherein an arithmetic average roughness Ra of the end surface is between 0.001 and 0.04 μm, and a maximum roughness height Ry of the end surface is between approximately 0.1 and 0.5 μm.

12. A display panel, comprising:
a first substrate comprising a first outer surface, a first inner surface and a first end surface, the first outer surface and the first end surface forming a first included angle therebetween;
a second substrate disposed opposite to the first substrate and comprising a second outer surface, a second inner surface and a second end surface, the second outer surface and the second end surface forming a second included angle therebetween; and
a sealant disposed between the first inner surface and the second inner surface, and comprising a sealant end surface between the first end surface and the second end surface;
wherein an arithmetic average roughness Ra of the first end surface or the second end surface is between 0.001 and 0.04 μm, and a maximum roughness height Ry of the first end surface or the second end surface is between approximately 0.1 and 0.5 μm.

13. The display panel of claim 12 , wherein the sum of the first included angle and the second included angle is equal to 180 degrees.

14. The display panel of claim 12 , wherein the first included angle is equal to the second included angle.

15. The display panel of claim 12 , wherein the first substrate further comprises a light-shielding area disposed between the first inner surface and the sealant.

16. The display panel of claim 15 , wherein the light-shielding area further comprises an outer end surface and an inner end surface, the outer end surface is connected to the first end surface or the sealant end surface, and the inner end surface is disposed opposite to the outer end surface.

17. A method for narrowing edges of a display panel, the display panel comprising a first substrate, a second substrate, a sealant, an initial first photo spacer, a second photo spacer and a liquid crystal layer, the initial first photo spacer and the second photo spacer forming a trench at an edge of the first substrate, the initial first photo spacer being placed outside the sealant and far from the liquid crystal layer, the second photo spacer being placed inside the sealant and next to the liquid crystal layer, the sealant and the liquid crystal layer being placed between the first substrate and the second substrate, and the sealant being within the trench, the method comprising:
providing the display panel;
simultaneously cutting the first substrate, the initial first sensing spacer and the second substrate to form a first photo spacer and an end surface, the end surface going through the first substrate, the first photo spacer and the second substrate; and
polishing the end surface, wherein an arithmetic average roughness Ra of the end surface is between 0.001 and 0.04 μm, and a maximum roughness height Ry of the end surface is between approximately 0.1 and 0.5 μm.

18. The method of claim 17 , wherein the cutting is to cut the first substrate, the initial first sensing spacer and the second substrate at a tilt angle.

Assignees

• Au Optronics Corp

Inventors

• Liu Yu Chen
• Liu Chung Wei
• Wang Shu Chih
• Weng Chia Shin

Classifications

• Y10T428/24355

  Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] · CPC title

• H01J2209/267

  shaped surfaces or flanges · CPC title

• G02F1/1333 Primary

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• Y10T83/04

  Processes · CPC title

• G02F2001/133388

  Physics · mapped topic