Liquid crystal display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9529233-B2
Application number	US-201414249430-A
Country	US
Kind code	B2
Filing date	Apr 10, 2014
Priority date	Apr 11, 2013
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

It is possible to separate each liquid crystal display panel from a mother board in which multiple liquid crystal display panels are formed even with a thin glass substrate, by forming a columnar spacer in the boundary between liquid crystal display panels, forming a scribe line corresponding to the columnar spacer on both sides of the counter substrate and the TFT substrate in the mother board, and forming a separation line between the scribe lines by applying a bending stress to the mother board. Since the columnar spacer is formed in a portion corresponding to the scribe line, the strength in this portion increases, so that the proper scribe lines and break lines can be formed when the thickness of the glass substrate is reduced to about 0.15 mm.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
a TFT substrate including a plurality of pixels arranged in a matrix;
a counter substrate disposed opposite the TFT substrate;
a plurality of spacers disposed on the counter substrate;
a sealing material bonding the TFT substrate and the counter substrate; and
a liquid crystal sealed between the TFT substrate and the counter substrate by the sealing material;
wherein the TFT substrate is made larger than the counter substrate to form a terminal portion on a single layer of the TFT substrate,
wherein a spacer of the plurality of spacers or a portion of the spacer is present in an end portion of the liquid crystal display device,
wherein the sealing material is present between the liquid crystal and the spacer or the portion of the spacer,
wherein the sealing material is not present in the end portion of the liquid crystal display device,
wherein the spacer or the portion of the spacer does not contact with the TFT substrate in end portions of three sides of the counter substrate other a side of the counter substrate facing the terminal portion of the liquid crystal display device,
wherein another spacer of the plurality of spacers or a portion of the another spacer formed at an end portion of the counter substrate facing the terminal portion is in contact with the TFT substrate.

2. The liquid crystal display device according to claim 1 , wherein the spacer formed on a side facing the terminal portion is formed on a laminated film of a black matrix and an overcoat film.

3. The liquid crystal display device according to claim 1 , wherein the spacer formed on a side facing the terminal portion and is formed on a laminated film of a black matrix, a color filter layer, and an overcoat film.

4. The liquid crystal display device according to claim 1 , wherein the spacer formed on a side facing the terminal portion and is formed on a laminated film of a black matrix, two color filter layers, and an overcoat film.

5. The liquid crystal display device according to claim 1 , wherein the spacer formed on a side facing the terminal portion is formed on a laminated film of a black matrix, three color filter layers, and an overcoat.

6. The liquid crystal display device according to claim 1 , wherein the spacer is formed in line along a side of the liquid crystal device.

7. The liquid crystal display device according to claim 1 , wherein a plurality of the spacers are separately formed in line with a distance w 2 along a side of the liquid crystal device, the width of the spacer along the side is w 1 ,
wherein w 1 is greater than w 2 .

8. A liquid crystal display device comprising:
a TFT substrate including a plurality of pixels arranged in a matrix;
a counter substrate disposed opposite the TFT substrate;
a plurality of spacers disposed on the counter substrate;
a sealing material bonding the TFT substrate and the counter substrate; and
a liquid crystal sealed between the TFT substrate and the counter substrate by the sealing material;
wherein the TFT substrate is made larger than the counter substrate to form a terminal portion on the single layer of the TFT substrate,
wherein a spacer of the plurality of spacers or a portion of the spacer, and the sealing material are provided on three sides of the liquid crystal display device other than a side facing the terminal portion,
wherein the sealing material on the three sides of the liquid crystal display device other than a side facing the terminal portion is provided to a space between a bottom surface of the spacer or the portion of the spacer and the TFT substrate,
wherein another spacer or a portion of the another spacer formed at an end portion of the counter substrate facing the terminal portion is in contact with the TFT substrate, and
wherein the sealing material is not present between a bottom surface of the another spacer or the portion of the another spacer and the TFT substrate at an end portion of the counter substrate facing the terminal portion.

9. The liquid crystal display device according to claim 8 , wherein the spacer formed on a side facing the terminal portion is formed on a laminated film of a black matrix and an overcoat film.

10. The liquid crystal display device according to claim 8 , wherein the spacer formed on a side facing the terminal portion is formed on a laminated film of a black matrix, a color filter layer, and an overcoat film.

11. The liquid crystal display device according to claim 8 , wherein the spacer formed on a side facing the terminal portion is formed on a laminated film of a black matrix, two color filter layers, and an overcoat film.

12. The liquid crystal display device according to claim 8 , wherein the spacer formed on a side facing the terminal portion is formed on a laminated film of a black matrix, three color filter layers, and an overcoat film.

13. The liquid crystal device according to claim 8 , wherein the spacer is formed in line along a side of the liquid crystal device.

14. The liquid crystal display device according to claim 8 , wherein a plurality of the spacers are separately formed in line with a distance w 2 along a side of the liquid crystal device, the width of the spacer along the side is w 1 ,
wherein w 1 is greater than w 2 .

15. A manufacturing method of a liquid crystal display device, the device comprising:
a TFT substrate including a plurality of pixels arranged in a matrix;
a counter substrate disposed opposite the TFT substrate;
a spacer disposed on the counter substrate;
a sealing material bonding the TFT substrate and the counter substrate; and
a liquid crystal sealed between the TFT substrate and the counter substrate by the sealing material;
wherein the TFT substrate is made larger than the counter substrate to form a terminal portion on a single layer of the TFT substrate, and
wherein the manufacturing method includes the steps of:
forming a plurality of liquid crystal display panels in a mother board;
forming the spacer in an end portion of each of the plurality of liquid crystal display panels,
wherein the spacer is formed on both sides of a separation line, and is in contact with the TFT substrate in an end portion of a side facing the terminal portion,
forming a scribe line along the separation line;
separating each of the plurality of liquid crystal display panels from the mother board by the separation line, and
removing a portion of the mother board from the terminal portion of the TFT substrate by applying stress to the mother board.

16. The manufacturing method of a liquid crystal display device according to claim 15 , wherein the spacer is formed on a black matrix and an overcoat film.

17. The manufacturing method of a liquid crystal display device according to claim 15 , wherein the spacer is formed on a laminated film of a black matrix, a color filter, and an overcoat film.

18. The manufacturing method of a liquid crystal display device according to claim 15 , wherein the spacer is formed in line along a side of the counter substrate.

19. The manufacturing method of a liquid crystal display device according to claim 15 , wherein a plurality of the spacers are separately formed in line with a distance w 2 along a side of the liquid crystal device, the width of the spacer along the side is w 1 ,
wherein w 1 is greater than w 2 .

Assignees

• Japan Display Inc

Inventors

• Hatakeyama Eisuke

Classifications

• G02F1/133351

  Manufacturing of individual cells out of a plurality of cells, e.g. by dicing · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/13394 Primary

  spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence) · CPC title

• G02F1/133514

  Colour filters · CPC title

• G02F1/1339

  Gaskets; Spacers; Sealing of cells · CPC title