LIQUID CRYSTAL DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF

• US 20060285060A1
• Filed: 05/30/2006
• Published: 12/21/2006
• Est. Priority Date: 05/27/2005
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: MISAKI, Katsunori, KUROSAWA, Yoshio, SAWASAKI, Manabu
• Granted Patent: US 8,059,252 B2
• Time in Patent Office: Days
• US Class Current: 349/156
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence

Abstract

The invention relates to a liquid crystal display device that is used in display portions of electronics devices and a manufacturing method thereof, and an object is to provide a high quality liquid crystal display device where light is inhibited from leaking and a manufacturing method thereof. The projected structure formed of the first through the fourth columnar spacer receiving patterns, the insulating film and the final protective film is formed on the TFT substrate. The projected structure is buried in the columnar spacer disposed on the opposite substrate. Thereby, even when the liquid crystal display panel is surface pressed, both substrates are hardly displaced.

Claims

1. A liquid crystal display device comprising:

a first substrate and a second substrate that are disposed facing each other;

a liquid crystal sealed between the first and the second substrates;

a columnar spacer disposed on the first substrate so as to hold a cell gap between the first and the second substrates; and

a projected structure that is formed on the second substrate and provided with columnar spacer receivers having at least two kinds of heights.

4. The liquid crystal display device according to claim 1, wherein the projected structure is formed with at least one layer of a gate layer, a gate insulating film layer, a semiconductor layer, a contact layer, a drain layer (data layer), a passivation film layer, an overcoat layer, a pixel electrode, a reflection/diffusion layer and a reflection electrode layer, all of which are disposed on the second substrate, or at least one layer of a black matrix layer, a CF layer, a common electrode layer and a domain control projection layer, all of which are disposed on the second substrate.

5. The liquid crystal display device according to claim 1, wherein the projected structure is an isolated pattern and at least part of the projected structure is formed into a structure where an area of a lower portion is larger than an area of an upper portion.

6. The liquid crystal display device according to claim 1, wherein the projected structure is buried in the columnar spacer.

7. The liquid crystal display device according to claim 6, wherein a plurality of the projected structures is disposed.

8. The liquid crystal display device according to claim 7, wherein a plurality of the projected structures is formed into different shapes.

13. The liquid crystal display device according to claim 1, wherein the columnar spacer receivers disposed on the second substrate are formed different in height.

14. The liquid crystal display device according to claim 1, wherein the columnar spacers having different shapes are plurality disposed.

15. The liquid crystal display device according to claim 1, wherein the columnar spacers having different hardness are plurality disposed.

2. A liquid crystal display device comprising:

a first substrate and a second substrate that are disposed facing each other;

a liquid crystal sealed between the first and the second substrates;

a columnar spacer disposed on the first substrate so as to hold a cell gap between the first and the second substrates;

a columnar spacer contact portion that is formed on the second substrate and provided with a columnar spacer receiver and with which the columnar spacer comes into contact; and

a columnar spacer periphery portion that is formed on the second substrate higher than the columnar spacer contact portion in the periphery of the columnar spacer contact portion and disposed in the periphery of the columnar spacer.

9. The liquid crystal display device according to claim 2, wherein the columnar spacer periphery portion is formed with at least one layer of a gate layer, a gate insulating film layer, a semiconductor layer, a contact layer, a drain layer (data layer), a passivation film layer, an overcoat layer, a pixel electrode, a reflection/diffusion layer and a reflection electrode layer, all of which are disposed on the second substrate, or with at least one layer of a black matrix layer, a CF layer, a common electrode layer and a domain control projection layer, all of which are disposed on the second substrate.

10. The liquid crystal display device according to claim 2, wherein the columnar spacer periphery portion is a predetermined bus line or a predetermined electrode that is formed on the second substrate.

11. The liquid crystal display device according to claim 2, wherein the columnar spacers are disposed on at least two different positions to a pattern of the second substrate.

3. A liquid crystal display device comprising:

a first substrate and a second substrate that are disposed facing each other;

a liquid crystal sealed between the first and the second substrates;

a columnar spacer disposed on the first substrate so as to hold a cell gap between the first and the second substrates;

a columnar spacer contact portion that is formed on the second substrate and provided with a columnar spacer receiver and comes into contact with the columnar spacer;

a columnar spacer that is formed on the first substrate and does not come into contact with the columnar spacer receiver on the second substrate; and

a columnar spacer periphery portion that is formed on the second substrate so as to be higher than a tip end portion of the columnar spacer and disposed in the periphery of the columnar spacer.

12. The liquid crystal display device according to claim 3, wherein the columnar spacer periphery portion is formed so as to be a throughhole structure.

16. A manufacturing method of a liquid crystal display device that includes a first substrate and a second substrate that are disposed facing each other, a liquid crystal sealed between the first and the second substrates and a columnar spacer disposed on the first substrate so as to hold a cell gap between the first and the second substrates, comprising:

forming, on the second substrate in a TFT formation process or a CF formation process, a projected structure that has columnar spacer receivers having at least two kinds of heights.

17. A manufacturing method of a liquid crystal display device that includes a first substrate and a second substrate that are disposed facing each other, a liquid crystal sealed between the first and the second substrates and a columnar spacer disposed on the first substrate so as to hold a cell gap between the first and the second substrates, comprising:

forming, on the second substrate in a TFT formation process or a CF formation process, a columnar spacer periphery portion that is disposed in the periphery of the columnar spacer so as to be higher than the columnar spacer contact portion with which the columnar spacer comes into contact.

18. A manufacturing method of a liquid crystal display device that includes a first substrate and a second substrate that are disposed facing each other, a liquid crystal sealed between the first and the second substrates and a columnar spacer disposed on the first substrate so as to hold a cell gap between the first and the second substrates, comprising:

forming, on the second substrate in a TFT formation process or a CF formation process, a columnar spacer periphery portion that is disposed in the periphery of the columnar spacer so as to be higher than a tip end of the .columnar spacer.