Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10095067-B2
Application number	US-201514957888-A
Country	US
Kind code	B2
Filing date	Dec 3, 2015
Priority date	Dec 4, 2014
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

There is achieved a liquid crystal display device having a smaller picture frame region and a seal part of improved reliability. A liquid crystal display device includes a TFT substrate having a display region and a terminal region and formed with an organic passivation film, a counter substrate attached to the TFT substrate through a seal part, and a liquid crystal contained inside the seal part. A hole is formed at a predetermined pitch on the organic passivation film of the TFT substrate corresponding to the seal part when viewed on a plane. When the hole is viewed on a plane, a shortest distance from the hole to the hole is four micrometers or greater and 12 micrometers or less at a height of h 1 =0.9×h 2 from a bottom face of the hole, where a depth of the hole is defined as h 2.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
a TFT substrate having a display region and a terminal region and formed with an organic passivation film;
a counter substrate attached to the TFT substrate through a seal part; and
a liquid crystal contained inside the seal part,
wherein a hole is formed at a predetermined pitch on the organic passivation film of the TFT substrate corresponding to the seal part when viewed on a plane,
when the hole is viewed on a plane, a shortest distance from the hole to the hole is four micrometers or greater and 12 micrometers or less at a height of h 1 =0.9×h 2 from a bottom surface of the hole, where a depth of the hole is defined as h 2 ,
lines are formed between the TFT substrate and the organic passivation film, and are not exposed by the hole,
the hole is arranged in a matrix in a plan view, and
a plurality of the lines are formed between the holes in a plan view.

2. The liquid crystal display device according to claim 1 ,
wherein the planar shape of the hole is a square; and
a length of a side of the square is one micrometer or greater and seven micrometers or less.

3. The liquid crystal display device according to claim 2 ,
wherein an overcoat film made of an organic material is formed on the counter substrate corresponding to the seal part, and a second hole is formed on the overcoat film at a predetermined pitch when viewed on a plane; and
a shortest distance from the second hole to the second hole is four micrometers or greater and 12 micrometers or less, where a depth of the second hole is defined as h 2 , and the second hole is viewed on a plane at a height h 1 =0.9×h 2 from a bottom surface of the second hole.

4. The liquid crystal display device according to claim 1 ,
wherein the planar shape of the hole is a circle; and
a diameter of the circle is one micrometer or greater and seven micrometers or less.

5. The liquid crystal display device according to claim 4 ,
wherein an overcoat film made of an organic material is formed on the counter substrate corresponding to the seal part, and a second hole is formed on the overcoat film at a predetermined pitch when viewed on a plane; and
a shortest distance from the second hole to the second hole is four micrometers or greater and 12 micrometers or less, where a depth of the second hole is defined as h 2 , and the second hole is viewed on a plane at a height h 1 =0.9×h 2 from a bottom surface of the second hole.

6. The liquid crystal display device according to claim 1 ,
wherein the planar shape of the hole has a major dimension and a minor dimension; and
the major dimension is one micrometer or greater and seven micrometers or less.

7. The liquid crystal display device according to claim 6 ,
wherein an overcoat film made of an organic material is formed on the counter substrate corresponding to the seal part, and a second hole is formed on the overcoat film at a predetermined pitch when viewed on a plane; and
a shortest distance from the second hole to the second hole is four micrometers or greater and 12 micrometers or less, where a depth of the second hole is defined as h 2 , and the second hole is viewed on a plane at a height h 1 =0.9×h 2 from a bottom surface of the second hole.

8. The liquid crystal display device according to claim 1 ,
wherein the depth h 2 of the hole is one micrometer or greater.

9. The liquid crystal display device according to claim 8 ,
wherein an overcoat film made of an organic material is formed on the counter substrate corresponding to the seal part, and a second hole is formed on the overcoat film at a predetermined pitch when viewed on a plane; and
a shortest distance from the second hole to the second hole is four micrometers or greater and 12 micrometers or less, where a depth of the second hole is defined as h 2 , and the second hole is viewed on a plane at a height h 1 =0.9×h 2 from a bottom surface of the second hole.

10. The liquid crystal display device according to claim 1 ,
wherein a value d 1 ×d 11 /p 1 ×p 2 is greater on an outer area of the seal part than on an inner area of the seal part,
where a pitch of the hole in a first direction is defined as p 1 , a pitch in a second direction is defined as p 2 , a major dimension of the planar shape of the hole is defined as d 1 , a minor dimension is defined as d 11 , a portion of the seal part on the liquid crystal side is defined as the inner area, a portion of the seal part on an opposite side of the liquid crystal is defined as the outer area, and a distance from an inner edge to an outer edge of the seal part is defined as a width of the seal part.

11. The liquid crystal display device according to claim 10 ,
wherein on an inner side from a center of the seal part in a width direction, the hole is not formed.

12. The liquid crystal display device according to claim 11 ,
wherein the value d 1 is equal to the value d 11 .

13. The liquid crystal display device according to claim 10 ,
wherein the value d 1 is equal to the value d 11 .

14. The liquid crystal display device according to claim 1 ,
wherein a value d 1 ×d 11 /p 1 ×p 2 on a first side region is smaller than a value d 1 ×d 11 /p 1 ×p 2 on a second side region,
where a pitch of the hole in a first direction is defined as p 1 , a pitch in a second direction is defined as p 2 , a major dimension of the planar shape of the hole is defined as d 1 , a minor dimension is defined as d 11 , a side region of the counter substrate on the terminal region side is defined as the first side region, and a side region opposed to the first side region is defined as the second side region.

15. The liquid crystal display device according to claim 14 ,
wherein the value d 1 is equal to the value d 11 .

16. The liquid crystal display device according to claim 1 ,
wherein a value d 1 ×d 11 /p 1 ×p 2 on a portion of a third side region near to a first side region is smaller than a value d 1 ×d 11 /p 1 ×p 2 on a portion of the third side region near to a second side region,
where a pitch of the hole in a first direction is defined as p 1 , a pitch in a second direction is defined as p 2 , a major dimension of the planar shape of the hole is defined as d 1 , a minor dimension is defined as d 11 , a side region of the counter substrate on the terminal region side is defined as the first side region, a side region opposed to the first side region is defined as the second side region, a side region on a left side viewed from the first side region is defined as the third side region.

17. The liquid crystal display device according to claim 16 ,
wherein the value d 1 is equal to the value d 11 .

18. The liquid crystal display device according to claim 1 ,
wherein a value d 1 ×d 11 /p 1 ×p 2 on a portion of a fourth side region near to a first side region is smaller than a value d 1 ×d 11 /p 1 ×p 2 on a portion of the fourth side region near to a second side region,
where a pitch of the hole in a first direction is defined as p 1 , a pitch in a second direction is defined as p 2 , a major dimension of the planar shape of the hole is defined as d 1 , a minor dimension is defined as d 11 , a side region of the counter substrate on the terminal region side is defined as the first side region, a side region opposed to the first side region is defined as the second side region, and a side region on a right side viewed from the first side region is defined as the fourth side region.

19. The liquid crystal display device according to c

Assignees

• Japan Display Inc

Inventors

• Nishino Tomonori
• Shimura Masato
• Ishikawa Tomokazu
• Kuramoto Yuki
• Hashimoto Satoshi

Classifications

• G02F2001/133388

  Physics · mapped topic

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title

• G02F1/1339 Primary

  Gaskets; Spacers; Sealing of cells · CPC title

• G02F1/133388

  with constructional differences between the display region and the peripheral region · CPC title