Liquid crystal display device

• US 10,642,105 B2
• Filed: 07/12/2018
• Issued: 05/05/2020
• Est. Priority Date: 12/15/2008
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Japan Display Incorporated
• Inventors: Nagami, Takahiro
• Primary Examiner(s): Nguyen, Hoan C
• Application Number:
  US16/033,507
• Publication Number:
  US 20180321527A1
• Time in Patent Office: 663 Days
• CPC Class Codes: G02F 1/133514 Colour filters
• 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 1/13398 Spacer materials; Spacer properties
• CPC Class Codes: G02F 1/1341 Filling or closing of cells

Abstract

A display device includes a display panel having a display region and a peripheral region, the display panel including a TFT substrate, a counter substrate fixed to the TFT substrate by seal material formed at the peripheral region, and liquid crystal interposed between the TFT substrate and the counter substrate. The TFT substrate includes an inorganic film and an organic film, with first column spacers being formed on the counter substrate. The organic film includes a first part which has an island-like shape formed at the peripheral region and a second part formed at the display region, and the seal material covers at least one of the first column spacers and the first part of the organic film, and is in contact with the inorganic film. The first part of the organic film is separated from the second part of the organic film of the organic film.

Claims

1. A display device comprising:

a first substrate;

an organic film provided on the first substrate;

a first inorganic insulation film provided on the organic film;

a second inorganic insulation film provided between the first substrate and the organic film;

a third inorganic insulation film provided between the second inorganic insulation film and the organic film;

a second substrate opposed to the first substrate;

a seal material bonding the first substrate and the second substrate; and

a protrusion provided on the second substrate,

wherein the seal material surrounds a display area,

the organic film has a slit that overlaps with the seal material, in a plan view, and extends along an extending direction of the seal material,

the protrusion is opposed to the organic film that is closer to an end of the first substrate than the slit of the organic film,

the protrusion is covered by the seal material,

the slit of the organic film is covered by the first inorganic insulation film, and

the first inorganic insulation film is directly in contact with the third inorganic insulation film in the slit of the organic film.

2. The display device according to claim 1, further comprising a metal line provided between the first substrate and the organic film, wherein the metal line overlaps with the slit of the organic film, in a plan view.

3. The display device according to claim 2,

wherein the first inorganic insulation film is provided continuously on the organic film to the end of the first substrate.

4. The display device according to claim 2,

wherein the metal line is between the second inorganic insulation film and the third inorganic insulation film.

5. The display device according to claim 4,

wherein the third inorganic insulation film is exposed by the slit of the organic film from the organic film.

6. The display device according to claim 1,

wherein the protrusion does not overlap with the slit of the organic film, in a plan view, and

the protrusion is in contact with the organic film, which is closer to an end of the first substrate than the slit.

7. The display device according to claim 1,

wherein the organic film, which is closer to the display area than the slit, extends continuously from the slit of the organic film to the display area.

8. The display device according to claim 1,

wherein the protrusion is provided between the end of the first substrate and the slit of the organic film, in a plan view, and

the protrusion does not overlap with the end of the first substrate, in a plan view.