LIQUID CRYSTAL DISPLAY DEVICE

• US 20100073616A1
• Filed: 09/21/2009
• Published: 03/25/2010
• Est. Priority Date: 09/22/2008
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Mutou, Daisuke, ABE, Hiroyuki, Kamada, Takamitsu
• Granted Patent: US 8,330,915 B2
• Time in Patent Office: Days
• US Class Current: 349/138
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133357 Planarisation layers
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer

Abstract

A liquid crystal display device capable of preventing the occurrence of crack in a capacitor insulating film due to laser marking is provided. The liquid crystal display device includes pixels arranged in a matrix in a display region above a substrate, a thin film layer formed in a non-display region excluding the display region, and a transparent insulating film extending from the display region to the non-display region and formed on the thin film layer, in which the transparent insulating film includes at least an organic insulating film formed of an organic compound for planarizing a surface of the substrate, an inorganic insulating film which is a thin film formed on the organic insulating film and formed of an inorganic compound and formed with an opening extending to the organic insulating film in a region above the thin film layer, and a transparent electrode layer which is formed in the opening of the inorganic insulating film to cover the organic insulating film exposed from the opening of the inorganic insulating film.

Claims

1. A liquid crystal display device comprising:

pixels arranged in a matrix in a display region above a substrate;

a thin film layer for laser writing formed in a non-display region excluding the display region; and

a transparent insulating film extending from the display region to the non-display region and formed on the thin film layer, wherein

the transparent insulating film includes at least an organic insulating film which is formed of an organic compound for planarizing a surface of the substrate,

an inorganic insulating film which is a thin film formed on the organic insulating film and formed of an inorganic compound and formed with an opening extending to the organic insulating film in a region above the thin film layer, and

a transparent electrode layer which is formed in the opening of the inorganic insulating film to cover the organic insulating film exposed from the opening of the inorganic insulating film.

4. The liquid crystal display device according to claim 1, wherein

the inorganic insulating film is formed of an inorganic compound having a higher dielectric constant than those of other inorganic insulating films formed in the display region.

5. The liquid crystal display device according to claim 1, wherein

the inorganic transparent insulating film is formed of an SiN thin film.

6. The liquid crystal display device according to claim 1, wherein

the inorganic transparent insulating film is a capacitor insulating film formed between a common electrode and a pixel electrode which constitute the pixel.

7. The liquid crystal display device according to claim 1, wherein

the thin film layer is formed of Mo, a W alloy, Al, or an Al alloy.

2. A liquid crystal display device comprising:

pixels arranged in a matrix in a display region above a substrate;

a thin film layer for laser writing formed in a non-display region excluding the display region; and

a transparent insulating film extending from the display region to the non-display region and formed on the thin film layer, wherein

the transparent insulating film includes at least

an organic insulating film which is formed of an organic compound for planarizing a surface of the substrate, and

an inorganic insulating film which is formed of an inorganic compound and formed on the organic insulating film, and

a groove portion extending from the inorganic insulating film to the organic insulating film is formed so as to annularly surround the periphery of the forming region of the thin film layer.

3. A liquid crystal display device comprising:

pixels arranged in a matrix in a display region above a substrate;

a thin film layer for laser writing formed in a non-display region excluding the display region; and

a transparent insulating film extending from the display region to the non-display region and formed on the thin film layer, wherein

the transparent insulating film includes at least

an organic insulating film which is formed of an organic compound for planarizing a surface of the substrate,

an inorganic insulating film which is formed of an inorganic compound, formed on the organic insulating film, and formed with an opening extending to the organic insulating film in a region above the thin film layer, and

a transparent electrode film which is formed in the opening of the inorganic insulating film to cover the organic insulating film exposed from the opening of the inorganic insulating film,

a groove portion extending from the inorganic insulating film to the organic insulating film is formed so as to annularly surround the periphery of the forming region of the thin film layer, and

the groove portion is covered with the transparent electrode film.