US5095379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color filter, liquid crystal display using same and method of repair thereof by using a negative photosensitive resin
Assignee: International Business Machines Corp
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Filing: 1991-04-15
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Granted: 1992-03-10
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Expires: 2011-04-15
Abstract
Abstract Color filters, including those used in a liquid crystal display, aee repaired in a self-aligning manner. Defective parts of the colored pixels of a filter are filled with a negative type photosensitive resin containing a pigment of the same color as the colored pixel. The photosensitive resin is exposed to light through the defective colored pixels and the exposed resin is developed. When the defect extends through pixels of different colors, a gray colored resin is utilized. The gray colored resin has a color temperature equal to that of the white color temperature resulting from the additive color process of the colors of the various colored pixels of the filter.
Inventors
- 👤 Tetsuya Fukunaga
- 👤 Ayumi Ikeda
- 👤 Toshihiro Ueki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:12
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/68; G03F1/72; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/133516; G03F7/00; G03F7/0005; G03F7/0007
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
41 words
A color filter comprising: a plurality of colored pixels: at least one of said pixels having a defect therein; said defect being filled with a negative type photosensitive resin containing a pigment of the same color as that of said pixel.
Claim 2
Dependent Claim
41 words
A color filter comprising: a plurality of colored pixels: at least one of said pixels having a defect therein; said defect being filled with a negative type photosensitive resin containing a pigment of the same color as that of said pixel.
Claim 3
Dependent Claim
20 words
The color filter according to claim 1, wherein said colored pixels comprises a negative type photosensitive resin containing a pigment.
Claim 4
Independent Claim
71 words
A method for repairing a defect in a color filter having colored pixels, comprising the steps of: applying to said colored pixels having the defect a negative type photosensitive resin in which is dispersed a pigment of the same color as said colored pixels having the defect; exposing said applied negative type photosensitive resin to light through said colored pixels having the defect; and developing said exposed negative type photosensitive resin.
Claim 5
Independent Claim
71 words
A method for repairing a defect in a color filter having colored pixels, comprising the steps of: applying to said colored pixels having the defect a negative type photosensitive resin in which is dispersed a pigment of the same color as said colored pixels having the defect; exposing said applied negative type photosensitive resin to light through said colored pixels having the defect; and developing said exposed negative type photosensitive resin.
Claim 6
Dependent Claim
46 words
A color filter comprising: a plurality of colored pixels of different colors; a defective portion extending over a plurality of colored pixels of different colors, said defective portion being filled with a negative type photosensitive resin, said resin containing a pigment which colors said resin gray.
Claim 7
Dependent Claim
46 words
A color filter comprising: a plurality of colored pixels of different colors; a defective portion extending over a plurality of colored pixels of different colors, said defective portion being filled with a negative type photosensitive resin, said resin containing a pigment which colors said resin gray.
Claim 8
Dependent Claim
23 words
The color filter of claim 4, wherein light transmittance of said gray colored negative type photosensitive resin is approximately 30% to approximately 60%.
Claim 9
Dependent Claim
38 words
The color filter of claim 4 wherein color temperature of said gray colored negative type photosensitive resin is equal to that of a white color resulting from the additive color mixing of the colored pixels of the filter.
Claim 10
Independent Claim
69 words
A method for repairing a defect extending over a plurality of colored pixels of different colors, comprising the steps of: applying to the plurality of colored pixels having said defect a negative type photosensitive resin containing a pigment which colors the resin gray; exposing said applied negative type photosensitive resin to light through said plurality of colored pixels with the defect; and developing said exposed negative type photosensitive resin.
Claim 11
Independent Claim
69 words
A method for repairing a defect extending over a plurality of colored pixels of different colors, comprising the steps of: applying to the plurality of colored pixels having said defect a negative type photosensitive resin containing a pigment which colors the resin gray; exposing said applied negative type photosensitive resin to light through said plurality of colored pixels with the defect; and developing said exposed negative type photosensitive resin.
Claim 12
Dependent Claim
38 words
The method of claim 7 wherein the color temperature of said gray colored negative type photosensitive resin is equal to that of the white color resulting from the additive color mixing of the colored pixels of the filter.
Claim 13
Dependent Claim
67 words
A liquid crystal display device comprising: a liquid crystal material layer interposed between a pair of transparent substrates, and a color filter having colored pixels interposed between one of said pair of transparent substrates and said liquid crystal material layer; wherein the defective portion of said colored pixels is filled with a negative type photosensitive resin containing a pigment of the same color as said colored pixels.
Claim 14
Dependent Claim
67 words
A liquid crystal display device comprising: a liquid crystal material layer interposed between a pair of transparent substrates, and a color filter having colored pixels interposed between one of said pair of transparent substrates and said liquid crystal material layer; wherein the defective portion of said colored pixels is filled with a negative type photosensitive resin containing a pigment of the same color as said colored pixels.
Claim 15
Dependent Claim
70 words
A liquid crystal display device comprising: a liquid crystal material layer interposed between a pair of transparent substrates, and a color filter having a plurality of colored pixels interposed between one of said pair of transparent substrates and said liquid crystal material layer; wherein the defective portion extending over the differently colored pixels of said color filter is filled with a negative type photosensitive resin colored gray with a pigment.
Claim 16
Dependent Claim
70 words
A liquid crystal display device comprising: a liquid crystal material layer interposed between a pair of transparent substrates, and a color filter having a plurality of colored pixels interposed between one of said pair of transparent substrates and said liquid crystal material layer; wherein the defective portion extending over the differently colored pixels of said color filter is filled with a negative type photosensitive resin colored gray with a pigment.
Claim 17
Dependent Claim
40 words
The liquid crystal display device of claim 10 wherein the color temperature of said gray colored negative type photosensitive resin is equal to that of a white color resulting from additive color mixing of the colored pixels of the filter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |