Display device and manufacturing method thereof

• US 9,395,585 B2
• Filed: 07/02/2015
• Issued: 07/19/2016
• Est. Priority Date: 10/01/2012
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Hatakeyama, Eisuke
• Primary Examiner(s): Vu, Phu
• Application Number:
  US14/791,122
• Publication Number:
  US 20150309349A1
• Time in Patent Office: 383 Days
• Field of Search: 349/153, 349155-156, 349/190
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13306 Circuit arrangements or driving methods for the control of single liquid crystal cells G02F1/132, G02F1/133382 take precedence
• CPC Class Codes: G02F 1/133351 Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
• CPC Class Codes: G02F 1/1337 Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
• CPC Class Codes: G02F 1/133792 by etching
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/13396 Spacers having different sizes
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 2201/50 Protective arrangements

Abstract

In a display device having high reliability, even if being a narrow framing type, and a method for manufacturing thereof, having a display panel, being made up with a first substrate 101 and a second substrate 201, which are adhered with using a seal 301, a main SOC 302 is disposed like a wall, on a peripheral end portion of the first substrate 101 and the second substrate 201, and the seal 301 is disposed inwardly of the main SOC 302. Also, in a method for manufacturing thereof, the main SOC 302 is formed in a region including a cutting plane between the display panel regions neighboring with, and on the cutting plane is made the cutting thereof.

Claims

1. A display device comprising:

a display panel, being constructed by adhering a first substrate and a second substrate with using a seal,

wherein a main spacer for use of adjusting a gap distance is disposed like a wall, on a peripheral end portion of the first and second substrates,

the seal is disposed inwardly of the main spacer,

the main spacer is disposed on the second substrate,

the display panel has a front surface and four sides,

one of the four sides has a side surface, wherein the side surface is substantially perpendicular to the front surface,

the side surface includes a cutting plane of the liquid crystal display panel, and

the cutting plane of the liquid crystal includes a first cutting plane of the main spacer, a second cutting plane of the first substrate and a third cutting plane of the second substrate, and the first cutting plane, the second cutting plane, and the third cutting plane coincide with each other in a plan view.

2. The display device according to claim 1, wherein plural numbers of sub spacers having height lower than that of the main spacer are disposed in an inside of the seal, on the second substrate.

3. The display device according to claim 1,

wherein the first substrate has an inorganic passivation film, and an upper layer passivation film or an organic passivation film, which is formed on the inorganic passivation film, and

the upper layer passivation film or the organic passivation film has plural numbers of grooves within a region where the seal is formed.

4. The display device according to claim 1,

wherein the first substrate has an inorganic passivation film, and an upper layer passivation film or an organic passivation film, which is formed on the inorganic passivation film,

the upper layer passivation film or the organic passivation film has plural numbers of grooves within a region where the seal is formed,

plural numbers of sub spacers having height lower than that of the main spacer are disposed inside of the seal on the second substrate, and

the sub spacers and the grooves are disposed so as to overlap each other when viewed from vertically above.

5. The display device according to claim 4,

wherein the first substrate has a gate wiring and a drain wiring, and

both the gate wiring and the drain wiring are disposed not to overlap on the sub spacers and the grooves when viewed from vertically above.

6. The display device according to claim 1, wherein the first substrate has an inorganic passivation film, and

the inorganic passivation film has plural numbers of grooves within a region where the seal is formed.

7. The display device according to claim 1, wherein the first substrate has an inorganic passivation film,

the inorganic passivation film has plural numbers of grooves within a region where the seal is formed,

plural numbers of sub spacers having height lower than that of the main spacer are disposed within an inside of the seal on the second substrate, and

the sub spacers and the grooves are disposed so as to overlap each other when viewed from vertically above.

8. The display device according to claim 7, wherein the first substrate has a gate wiring and a drain wiring, and both the gate wiring and the drain wiring are disposed not to overlap on the sub spacers and the grooves when viewed from vertically above.

9. The display device according to claim 1,

wherein the display panel has an effective display region, comprising spacer for defining a gap distance between the first substrate and the second substrate, and

height of the main spacer is higher than height of the spacer in the effective display region.

10. The display device according to claim 9, wherein the main spacer and the spacer in the effective display region are made of the same material.

11. The display device according to claim 1, wherein the first substrate has an alignment film, and the alignment film extends to the end of the first substrate and the second substrate, and the main spacer is in contact with the alignment film.