Method of producing a display panel

Patent metadata

Field	Value
Publication number	US-10866446-B2
Application number	US-201615757360-A
Country	US
Kind code	B2
Filing date	Aug 26, 2016
Priority date	Sep 4, 2015
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A method of producing a liquid crystal panel includes a grinding process and a sealing process. The grinding process includes grinding at least one common liquid crystal panel including a liquid crystal layer, a pair of boards that sandwich the liquid crystal layer, and a frame-shaped sealing member sandwiched between the boards along the non-rectangular outline to remove a section of the sealing member and to leave a rest of the sealing member. The grinding process further includes forming a sealing member removed processed edge section of the common liquid crystal panel. The sealing member removed processed edge section includes edges of the boards corresponding to the section of the sealing member removed from the common liquid crystal panel. The sealing process includes applying a sealing resin to the sealing member removed processed edge section to fill a space between the edges of the board.

First claim

The invention claimed is:

1. A method of producing a liquid crystal panel having a non-rectangular outline, the method comprising:
a grinding process including:
grinding at least one common liquid crystal panel including a liquid crystal layer, a pair of boards opposed to each other to sandwich the liquid crystal layer, and a frame-shaped sealing member sandwiched between the boards to fix the boards and surrounding the liquid crystal layer to seal the liquid crystal layer along a processing line defined along the non-rectangular outline to remove a section of the sealing member and to leave a rest of the sealing member; and
forming a sealing member removed processed edge section of the common liquid crystal panel such that the liquid crystal layer is exposed, the sealing member removed processed edge section including edges of the boards corresponding to the section of the sealing member removed from the common liquid crystal panel; and

a sealing process including applying a sealing resin to the sealing member removed processed edge section to fill a space between the edges of the boards to seal the liquid crystal layer together with the rest of the sealing member.

2. The method of producing a liquid crystal panel according to claim 1 , wherein the grinding process includes grinding the common liquid crystal panel that is sandwiched and held in a thickness direction of the common liquid crystal panel along the processing line.

3. The method of producing a liquid crystal panel according to claim 2 , wherein the grinding process includes holding the common liquid crystal panel by a clamping device that includes a pair of holding portions to be sandwiched between the holding portions in the thickness direction.

4. The method of producing a liquid crystal panel according to claim 2 , wherein the grinding process includes sandwiching the common liquid crystal panel between protective boards, holding the common liquid crystal panel and the protective boards together, and grinding the common liquid crystal panel together with the protective boards along the processing line.

5. The method of producing a liquid crystal panel according to claim 1 , wherein the sealing process includes a curing process that includes applying the sealing resin that is any one of a thermosetting resin, a photo-curable resin, and a thermosetting and photo curable resin cured by heat and/or light and in an uncured state to the sealing member removed processed edge section and applying the heat and/or the light to the sealing resin to cure the sealing resin in the uncured state.

6. The method of producing a liquid crystal panel according to claim 5 , wherein
the sealing process includes applying the sealing resin to the sealing member removed processed edge section of the common liquid crystal panel that is sandwiched to be under pressure in the thickness direction, and
the curing process includes applying the heat and/or the light to the sealing resin in the common liquid crystal panel that is released from the pressure in the thickness direction.

7. The method of producing a liquid crystal panel according to claim 1 , wherein
the sealing resin used in the sealing process includes a plurality of kinds of sealing resins, and
the sealing process includes applying the sealing resins to the sealing member removed processed edge section to form multiple layers.

8. The method of producing a liquid crystal panel according to claim 7 , wherein the sealing resins used in the sealing process include an acrylic-based resin that is directly applied to the sealing member removed processed edge section and an epoxy-based resin that is applied to over the acrylic-based resin.

9. The method of producing a liquid crystal panel according to claim 1 , further comprising a moisture barrier attaching process including attaching a moisture barrier having an elongated shape to at least the sealing member removed processed edge section of the common liquid crystal panel, the moisture barrier including a section to cover at least the sealing member removed processed edge section and having moisture resistance and flexibility.

10. The method of producing a liquid crystal panel according to claim 9 , wherein the moisture barrier used in the moisture barrier attaching process is a glass ribbon.

11. The method of producing a liquid crystal panel according to claim 1 , wherein
the at least one common liquid crystal panel includes a plurality of common liquid crystal panels, and
the grinding process includes collectively grinding the plurality of common liquid crystal panels that are layered in the thickness direction.

12. The method of producing a liquid crystal panel according to claim 11 , wherein the grinding process includes fixing the plurality of common liquid crystal panels together with adhesives disposed between the common liquid crystal panels not to be displaced from each other.

13. The method of producing a liquid crystal panel according to claim 12 , wherein the grinding process includes applying the adhesives to areas of the common liquid crystal panel outside the processing line.

14. The method of producing a liquid crystal panel according to claim 1 , further comprising:
a mother common liquid crystal panel producing process including producing a mother common liquid crystal panel including a plurality of common liquid crystal panels of the at least one common liquid crystal panel, the plurality of common liquid crystal panels being arranged in a matrix; and
a singulation process including cutting the mother common liquid crystal panel into the common liquid crystal panels to obtain the plurality of common liquid crystal panels.

15. The method of producing a liquid crystal panel according to claim 1 , wherein one of the boards of the at least one common liquid crystal panel is an array board including a plurality of gate drivers monolithically fabricated and disposed to be decentralized inside the frame-shaped sealing member.

Assignees

• Sharp Kk

Inventors

• Kanehiro Masayuki
• Nakanishi Youhei

Classifications

• G02F1/133354

  Arrangements for aligning or assembling substrates · CPC title

• B24B27/0616

  using a tool turning around the workpiece · CPC title

• B24B27/003

  using a tool turning around the work-piece · CPC title

• G02F1/1303

  Apparatus specially adapted to the manufacture of LCDs · CPC title

• B24B9/00

  Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor (B24B21/00 takes precedence; for sharpening cutting edges on tools B24B3/00; removing burrs by loose abrasive material B24B31/00) · CPC title