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US 9,285,619 B2Granted
Display panel, method of manufacturing the same, and liquid crystal display panel
AssigneeMitsubishi Electric Corporation
InventorsKazushi Yamayoshi, Takeshi Sonoda, Koichi Takai, Osamu Miyakawa, Shinsuke Ogata, Takeshi Shimamura
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Abstract
A liquid crystal display panel includes a thin film transistor disposed on an insulating substrate in a display region, an external wiring for connecting the thin film transistor to a terminal electrode, and a planarized film disposed on the thin film transistor, and having a planarized upper surface. The planarized film is not disposed, or a planarized film having a smaller film thickness than that of the planarized film in the display region is disposed, above the external wiring in a frame region.
Claims10
A display panel comprising:
- an insulating substrate in which a display region and a frame region surrounding said display region are defined;
- a thin film transistor disposed on said insulating substrate in said display region;
- a terminal electrode disposed on said insulating substrate in said frame region;
- a wiring disposed on said insulating substrate, for connecting said thin film transistor to said terminal electrode;
- an insulating film having an opening in said terminal electrode so that there is no direct contact between said insulating film and said terminal electrode, and covering said wiring;
- and
- a planarized film disposed on said thin film transistor, and having a planarized upper surface, wherein
- said planarized film is not disposed, or a planarized film having a smaller film thickness than that of said planarized film disposed in said display region is disposed, above said wiring in said frame region.
5 more elements
A liquid crystal display panel including a display panel, wherein said display panel comprises:
- an insulating substrate in which a display region and a frame region surrounding said display region are defined;
- a thin film transistor disposed on said insulating substrate in said display region;
- a terminal electrode disposed on said insulating substrate in said frame region;
- a wiring disposed on said insulating substrate, for connecting said thin film transistor to said terminal electrode;
- an insulating film having an opening in said terminal electrode so that there is no direct contact between said insulating film and said terminal electrode, and covering said wiring;
- and
- a planarized film disposed on said thin film transistor, and having a planarized upper surface, wherein
- said planarized film is not disposed, or a planarized film having a smaller film thickness than that of said planarized film disposed in said display region is disposed, above said wiring in said frame region, and
- said liquid crystal display panel comprises:
- a liquid crystal layer disposed above said planarized film in said display region;
- and
- a pixel electrode and an opposed electrode disposed between said planarized film and said liquid crystal layer in said display region and provided to apply a fringe electric field to said liquid crystal layer.
9 more elements
A method of manufacturing a display panel comprising the steps of:
- (a) forming a thin film transistor on an insulating substrate in a display region, in said insulating substrate said display region and a frame region surrounding said display region being defined, forming a terminal electrode on said insulating substrate in said frame region, forming a wiring for connecting said thin film transistor to said terminal electrode on said insulating substrate, and forming an insulating film for covering said terminal electrode and said wiring;
- (b) forming a planarized film having a planarized upper surface on a whole surface of said insulating substrate after said step (a);
- (c) forming a contact hole in said planarized film on said thin film transistor, in said display region, and removing said planarized film formed above said terminal electrode and reducing a film thickness of said planarized film formed above said wiring to be thinner than said planarized film in said display region, in said frame region, and
- (d) forming an opening over said terminal electrode by etching said insulating film after said step (c).
1 more element
A display panel comprising:
- an insulating substrate in which a display region and a frame region surrounding said display region are defined;
- a thin film transistor disposed on said insulating substrate in said display region;
- a terminal electrode disposed on said insulating substrate in said frame region;
- a wiring disposed on said insulating substrate, for connecting said thin film transistor to said terminal electrode;
- an insulating film having an opening over said terminal electrode, and covering said wiring;
- and
- a planarized film disposed on said thin film transistor and above said wiring in said frame region, and having a planarized upper surface, wherein
- said planarized film having a smaller film thickness in said frame region than that of said planarized film disposed in said display region.
5 more elements
A liquid crystal display panel including a display panel, wherein said display panel comprises:
- an insulating substrate in which a display region and a frame region surrounding said display region are defined;
- a thin film transistor disposed on said insulating substrate in said display region;
- a terminal electrode disposed on said insulating substrate in said frame region;
- a wiring disposed on said insulating substrate, for connecting said thin film transistor to said terminal electrode;
- an insulating film having an opening over said terminal electrode, and covering said wiring;
- and
- a planarized film disposed on said thin film transistor and above said wiring in said frame region, and having a planarized upper surface, wherein
- said planarized film having a smaller film thickness in said frame region than that of said planarized film disposed in said display region, and
- said liquid crystal display panel comprises:
- a liquid crystal layer disposed above said planarized film in said display region;
- and
- a pixel electrode and an opposed electrode disposed between said planarized film and said liquid crystal layer in said display region and provided to apply a fringe electric field to said liquid crystal layer.
9 more elements
Dependencies are inferred from the claim text.