US5818550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color display device
Assignee: Sony Corp
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Filing: 1995-10-18
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Granted: 1998-10-06
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Expires: 2015-10-18
Abstract
Abstract A color display device such as an active-matrix type liquid crystal display apparatus has a first substrate having pixel electrodes arranged in the form of the matrix, switching elements associated with respective pixel electrodes and color filters aligned with the respective pixel electrodes. The first substrate is composed of a laminate structure including, superposed in the mentioned sequence, a first layer having the switching elements, a second layer having the color filters, a third layer including a planarization film which fills convexities presented by the switching elements and the color filters, and a fourth layer having the pixel electrodes aligned with the color filter. The display device also has a second substrate including a counter electrode and adjoined to the first substrate leaving a predetermined gap left therebetween. A liquid crystal is charged in the gap between the first and second substrates.
Inventors
- 👤 Hisashi Kadota
- 👤 Yuko Inoue
- 👤 Takenobu Urazono
- 👤 Masafumi Kunii
- 👤 Shinji Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:30
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136227; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/133357; G02F1/136209; G02F1/1368
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
136 words
A color display device, comprising: a first substrate having pixel electrodes arranged in the form of a matrix, thin film transistors associated with respective pixel electrodes and color filters aligned with the respective pixel electrodes, said first substrate having a laminate structure including a first layer having said thin film transistors, and an interlayer insulating layer, a second layer having said color filters and a light shielding layer provided over said thin film transistor on said insulating layer, a third layer including a planarization film for providing a planarized surface thereon, and a fourth layer having said pixel electrodes aligned with said color filters superimposed on one another in that order; a second substrate having a counter electrode and adjoined to said first substrate through a gap therebetween; and an electro-optical material held in said gap.
Claim 2
Dependent Claim
136 words
A color display device, comprising: a first substrate having pixel electrodes arranged in the form of a matrix, thin film transistors associated with respective pixel electrodes and color filters aligned with the respective pixel electrodes, said first substrate having a laminate structure including a first layer having said thin film transistors, and an interlayer insulating layer, a second layer having said color filters and a light shielding layer provided over said thin film transistor on said insulating layer, a third layer including a planarization film for providing a planarized surface thereon, and a fourth layer having said pixel electrodes aligned with said color filters superimposed on one another in that order; a second substrate having a counter electrode and adjoined to said first substrate through a gap therebetween; and an electro-optical material held in said gap.
Claim 3
Dependent Claim
19 words
A color display device according to claim 1, wherein said planarization film is formed of an organic transparent material.
Claim 4
Dependent Claim
23 words
A color display device according to claim 1, wherein said color filters are formed of an organic photosensitive material containing pigments dispersed therein.
Claim 5
Dependent Claim
38 words
A color display device according to claim 1, wherein said light shielding layer comprises a metal film through which said pixel electrodes of said fourth layer are electrically connected to said thin film transistors of said first layer.
Claim 6
Dependent Claim
39 words
A color display device according to claim 1, wherein said light shielding layer comprises an insulating film through which said pixel electrodes of said fourth layer extend into electrical contact with said thin film transistors of said first layer.
Claim 7
Dependent Claim
20 words
A color display device according to claim 1, wherein said thin film transistor is a top-gate type thin film transistor.
Claim 8
Dependent Claim
20 words
A color display device according to claim 1, wherein said thin film transistor is a bottom-gate type thin film transistor.
Claim 9
Dependent Claim
16 words
A color display device according to claim 1, wherein said electro-optical material is a liquid crystal.
Claim 10
Dependent Claim
18 words
The display device of claim 1, wherein the light shielding layer is in contact with the drain electrode.
Claim 11
Dependent Claim
153 words
A display device comprising: a substrate; at least one active layer formed on the substrate; a first interlayer insulating film formed on the substrate in areas of the substrate where there is no active layer; a source electrode formed over a source region of the active layer; a drain electrode formed over a drain region of the active layer; a gate electrode formed over a date region of the active layer; a second inter-layer insulating film formed on the first interlayer insulating film and extending over the source electrode and above the gate electrode; a color filter formed over the second interlayer insulating film; a transparent-planarizing layer formed over the color filter; a pixel electrode formed over the planarizing layer; and further comprising a single mask layer formed over the second interlayer insulating film above the gate electrode beneath the planarizing layer extending from a location at least adjacent to the drain electrode.
Claim 12
Dependent Claim
153 words
A display device comprising: a substrate; at least one active layer formed on the substrate; a first interlayer insulating film formed on the substrate in areas of the substrate where there is no active layer; a source electrode formed over a source region of the active layer; a drain electrode formed over a drain region of the active layer; a gate electrode formed over a date region of the active layer; a second inter-layer insulating film formed on the first interlayer insulating film and extending over the source electrode and above the gate electrode; a color filter formed over the second interlayer insulating film; a transparent-planarizing layer formed over the color filter; a pixel electrode formed over the planarizing layer; and further comprising a single mask layer formed over the second interlayer insulating film above the gate electrode beneath the planarizing layer extending from a location at least adjacent to the drain electrode.
Claim 13
Dependent Claim
19 words
The display device of claim 10, wherein the mask layer is formed beneath a portion of the color filter.
Claim 14
Dependent Claim
19 words
The display device of claim 10, wherein the mask layer is formed above a portion of the color filter.
Claim 15
Dependent Claim
21 words
The display device of claim 10, wherein the mask layer is conductive and connects the pixel electrode with the drain electrode.
Claim 16
Dependent Claim
19 words
The display device of claim 13, wherein the mask layer is formed beneath a portion of the color filter.
Claim 17
Dependent Claim
19 words
The display device of claim 13, wherein the mask layer is formed above a portion of the color filter.
Claim 18
Dependent Claim
26 words
The display device of claim 10, wherein the drain electrode extends to the top surface of the planarizing layer and connects directly with the pixel electrode.
Claim 19
Dependent Claim
17 words
The display device of claim 10, wherein the mask layer is in contact with the drain electrode.
Claim 20
Dependent Claim
133 words
A display device comprising: a substrate; at least one gate electrode formed on the substrate; a gate insulating film formed over the gate electrode; an active layer formed over the gate insulating film; an etching stopper formed on the active layer over the gate electrode; a source electrode connected to a source region of the active layer; a drain electrode connected to a drain region of the active layer; an interlayer-insulating film formed over the source electrode and etching stopper; a mask layer formed on the interlayer-insulating film in a region above the active layer; a color filter formed on the interlayer-insulating film in a region which is not above the active layer; a planarizing layer formed on the color filter and mask layer; and a pixel electrode formed on the planarizing layer.
Claim 21
Dependent Claim
133 words
A display device comprising: a substrate; at least one gate electrode formed on the substrate; a gate insulating film formed over the gate electrode; an active layer formed over the gate insulating film; an etching stopper formed on the active layer over the gate electrode; a source electrode connected to a source region of the active layer; a drain electrode connected to a drain region of the active layer; an interlayer-insulating film formed over the source electrode and etching stopper; a mask layer formed on the interlayer-insulating film in a region above the active layer; a color filter formed on the interlayer-insulating film in a region which is not above the active layer; a planarizing layer formed on the color filter and mask layer; and a pixel electrode formed on the planarizing layer.
Claim 22
Dependent Claim
77 words
A color display device comprising: a substrate; at least one thin film transistor having a semiconductor layer formed on the substrate; an interlayer insulating layer formed over the thin film transistor; a color filter formed on the interlayer insulating layer; a light shielding layer formed on the interlayer insulating layer; a transparent-planarizing layer formed on the color filter and light shielding layer for providing a planarized surface thereon; and a pixel electrode formed on the planarizing layer.
Claim 23
Dependent Claim
77 words
A color display device comprising: a substrate; at least one thin film transistor having a semiconductor layer formed on the substrate; an interlayer insulating layer formed over the thin film transistor; a color filter formed on the interlayer insulating layer; a light shielding layer formed on the interlayer insulating layer; a transparent-planarizing layer formed on the color filter and light shielding layer for providing a planarized surface thereon; and a pixel electrode formed on the planarizing layer.
Claim 24
Dependent Claim
17 words
A color display device of claim 19, wherein said pixel electrode is connected to the semiconductor layer.
Claim 25
Dependent Claim
26 words
A color display of claim 19, further comprising a drain electrode, and wherein said pixel electrode is connected to the semiconductor layer through the drain electrode.
Claim 26
Dependent Claim
29 words
A color display of claim 19, wherein said light shielding layer is a metal, and said pixel electrode is connected to the semiconductor layer through the light shielding layer.
Claim 27
Dependent Claim
26 words
A color display of claim 20, further comprising a drain electrode, and wherein said pixel electrode is connected to the semiconductor layer through the drain electrode.
Claim 28
Dependent Claim
29 words
A color display of claim 23, wherein said light shielding layer is a metal, and said pixel electrode is connected to the semiconductor layer through the light shielding layer.
Claim 29
Dependent Claim
76 words
A color display device, comprising: a substrate; at least one thin film transistor having a gate electrode formed on the substrate; an interlayer insulating layer formed over the thin film transistor; a color filter formed on the interlayer insulating layer; a light shielding layer formed on the interlayer insulating layer; a transparent-planarizing layer formed on the color filter and light-shielding layer for providing a planarized surface thereon; and a pixel electrode formed on the planarizing layer.
Claim 30
Dependent Claim
76 words
A color display device, comprising: a substrate; at least one thin film transistor having a gate electrode formed on the substrate; an interlayer insulating layer formed over the thin film transistor; a color filter formed on the interlayer insulating layer; a light shielding layer formed on the interlayer insulating layer; a transparent-planarizing layer formed on the color filter and light-shielding layer for providing a planarized surface thereon; and a pixel electrode formed on the planarizing layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-10-05 | 2002-04-06 | 2002-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-05 | 2006-04-06 | 2006-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-05 | 2010-04-06 | 2010-10-06 | $7700.00 | Window Closed / Lapsed |