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US 7,804,552 B2Granted
Electro-optical device with light shielding portion comprising laminated colored layers, electrical equipment having the same, portable telephone having the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsShunpei Yamazaki, Yuugo Goto, Hideki Katsura
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Abstract
An object of the present invention is to provide a pixel structure capable of shielding light between a TFT and a pixel without using a light shielding mask (black matrix) in an electro-optical display device. The present invention has a feature in that, as one of means for shielding light, a lamination film consisting of two colored layers (a lamination layer of a red-colored layer and a blue-colored layer) is formed on an opposing substrate as a light shielding portion so as to overlap with a TFT formed on a device electrode.
Claims22
An electro-optical device comprising:
- a gate electrode formed over a first substrate;
- a source wiring formed over said first substrate;
- a first insulating film formed on said gate electrode and said source wiring;
- a semiconductor layer formed over said first insulating film, and having at least a source region, a drain region, and a channel formation region interposed therebetween;
- a second insulating film covering at least said semiconductor layer;
- a gate wiring formed on said second insulating film, and electrically connected to said gate electrode;
- a connection wiring for electrically connecting said source wiring and said semiconductor layer, and formed on said second insulating film;
- a second substrate opposed to said first substrate;
- a light shielding portion comprising a first colored layer and a second colored layer;
- a first pixel opening comprising said first colored layer, a second pixel opening comprising said second colored layer and a third pixel opening comprising a third colored layer;
- and
- an organic resin film covering said light shielding portion, said first colored layer, said second colored layer and said third colored layer,
- wherein said light shielding portion overlaps the channel formation region;
- wherein a liquid crystal is interposed between said organic resin film and said channel formation region;
- wherein said organic resin film has a thickness of 1μm or more;
- wherein said light shielding portion is interposed between said second substrate and said liquid crystal;
- and
- wherein a pixel electrode is electrically connected to said source region or said drain region, said pixel electrode comprises a transparent conductive film.
15 more elements
An electro-optical device comprising:
- a gate electrode formed over a first substrate;
- a source wiring formed over said first substrate;
- a first insulating film formed on said gate electrode and said source wiring;
- a semiconductor layer formed over said first insulating film, and having at least a source region, a drain region, and a channel formation region interposed therebetween;
- a second insulating film covering at least said semiconductor layer;
- a gate wiring formed on said second insulating film, and electrically connected to said gate electrode;
- a connection wiring for electrically connecting the source wiring and the semiconductor layer, and formed on said second insulating film;
- a second substrate opposed to said first substrate;
- a first colored layer, a second colored layer and a third colored layer formed on said second substrate;
- a light shielding portion comprising said first colored layer and said second colored layer;
- and
- an organic resin film covering said light shielding portion, said first colored layer, said second colored layer, and said third colored layer,
- wherein said light shielding portion overlaps said channel formation region;
- wherein a liquid crystal is interposed between said organic resin film and said channel formation region;
- wherein said organic resin film has a thickness of 1μm or more;
- wherein a pixel electrode is electrically connected to said source region or said drain region, said pixel electrode comprises a transparent conductive film;
- and
- wherein said light shielding portion is interposed between said second substrate and said liquid crystal.
15 more elements
An electro-optical device comprising:
- a first substrate;
- a reverse stagger type thin film transistor formed over said first substrate, said reverse stagger type thin film transistor comprising;
- a gate electrode;
- a first insulating film formed on said gate electrode;
- and
- a channel formation region, a source region and a drain region formed over the first insulating film;
- a source wiring formed over said first substrate,
- wherein the source wiring is electrically connected to said source region through a second wiring formed over the first insulating film, and
- wherein the first insulating film is formed on the source wiring;
- a second insulating film over at least the channel formation region, the source region and the drain region,
- wherein the second wiring is formed on said second insulating film,
- a gate wiring formed on said second insulating film, and electrically connected to said gate electrode;
- a pixel electrode comprising a first transparent conductive film, and electrically connected to said drain region;
- a second substrate opposed to said first substrate;
- at least a first colored layer and a second colored layer formed on said second substrate, wherein said first colored layer and said second colored layer partly overlap each other,
- wherein said first colored layer and said second colored layer partly overlap each other to form a light shielding portion, and
- wherein said light shielding portion overlaps at least said channel formation region;
- an organic resin film covering said first and second colored layers;
- an opposing electrode comprising a second transparent conductive film;
- and
- a liquid crystal interposed between said pixel electrode and said opposing electrode, wherein said organic resin film is interposed between said liquid crystal and said first and second colored layers,
- wherein said organic resin film covers said first and second colored layers and said light shielding portion,
- wherein said organic resin film has a thickness of 1 μm or more, and
- wherein said opposing electrode is interposed between said liquid crystal and said organic. resin film.
21 more elements
An electro-optical device comprising:
- a first substrate;
- a reverse stagger type thin film transistor formed over said first substrate, said reverse stagger type thin film transistor comprising;
- a gate electrode;
- a first insulating film formed on said gate electrode;
- a channel formation region, a source region and a drain region formed over the first insulating film;
- a source wiring formed over said first substrate,
- wherein the source wiring is electrically connected to said source region through a second wiring formed over the first insulating film, and
- wherein the first insulating film is formed on the source wiring;
- a second insulating film over at least the channel formation region, the source region and the drain region,
- wherein the second wiring is formed on said second insulating film;
- a gate wiring formed on said second insulating film, and electrically connected to said gate electrode;
- a pixel electrode electrically connected to said drain region;
- a second substrate opposed to said first substrate;
- a first colored layer, a second colored layer and a third colored layer formed on said second substrate, wherein said first colored layer and said second colored layer partly overlap each other,
- wherein said first colored layer, said second colored layer and said third colored layer partly overlap each other to form a light shielding portion,
- wherein said light shielding portion overlaps at least said channel formation region;
- an organic resin film covering said first, second and third colored layers;
- and
- a liquid crystal interposed between said first substrate and said second substrate, wherein said organic resin film is interposed between said liquid crystal and said first, second and third colored layers,
- wherein said organic resin film covers said first, second and third colored layers and said light shielding portion, and
- wherein said organic resin film has a thickness of 1 μm or more.
18 more elements
Dependencies are inferred from the claim text.