Patent US5757452A successfully refreshed from Google Patents.
US5757452A
Expired / Lapsed
US
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Color liquid crystal panel with light shielding layer sections formed between color filter films without contacting said color filter films
Assignee: Canon Inc
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Filing: 1995-12-20
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Granted: 1998-05-26
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Expires: 2015-12-20
Abstract
Abstract The invention provides a color liquid crystal panel which has a liquid crystal placed between a first substrate and a second substrate, the first substrate having formed thereon a plurality of color filter films and transparent electrodes and the second substrate having formed thereto a transparent electrode. It also has first light-shielding layer sections. formed on the first substrate either in the same layer as the color filter film or in a layer at the substrate side from the color filter films, without contacting the color filter films. It further has second light-shielding layer sections formed in a layer at the liquid crystal layer side from the color filter films. Light is completely shielded by the first light-shielding layer sections and/or the second light-shielding layer section(s) between the color filter films. Such a color liquid crystal panel is highly effective in shielding the gaps between the color filter films, and is less reflective to external light or the like at the display surface.
Inventors
- 👤 Yuichi Masaki
- 👤 Kazuya Ishiwata
- 👤 Masaaki Suzuki
- 👤 Yuko Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:12
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
136 words
A color liquid crystal panel which has a liquid crystal placed between a first substrate and a second substrate, said first substrate having formed thereon a plurality of color filter films and transparent electrodes in correspondence with display pixels and said second substrate having formed thereto a transparent electrode, wherein first light-shielding layer sections are formed on said first substrate in the same layer as said color filter films or in a layer at the first substrate side from said color filter films, without contacting said color filter films, and wherein second light-shielding layer sections are formed in a layer at the liquid crystal layer side from said color filter films, so that light trying to pass between color filter films is completely shielded by said first light-shielding layer sections and/or said second light-shielding layer sections.
Claim 2
Dependent Claim
136 words
A color liquid crystal panel which has a liquid crystal placed between a first substrate and a second substrate, said first substrate having formed thereon a plurality of color filter films and transparent electrodes in correspondence with display pixels and said second substrate having formed thereto a transparent electrode, wherein first light-shielding layer sections are formed on said first substrate in the same layer as said color filter films or in a layer at the first substrate side from said color filter films, without contacting said color filter films, and wherein second light-shielding layer sections are formed in a layer at the liquid crystal layer side from said color filter films, so that light trying to pass between color filter films is completely shielded by said first light-shielding layer sections and/or said second light-shielding layer sections.
Claim 3
Dependent Claim
79 words
A color liquid crystal panel according to claim 1, wherein said first light-shielding layer sections are formed in the same layer as the color filter films, and wherein light trying to pass through one gap between said color filter films is completely shielded by both the first light-shielding layer section and the second light-shielding layer section, and light trying to pass through the other gap between the color filter films is shielded by said second light-shielding layer section alone.
Claim 4
Dependent Claim
61 words
A color liquid crystal panel according to claim 1, wherein said first light-shielding layer sections are formed at the substrate side in a layer different from the layer of the color filter films, and wherein light trying to pass through one gap between said color filters is shielded by said first light-shielding layer section or said second light-shielding layer section alone.
Claim 5
Dependent Claim
29 words
A color liquid crystal panel according to claim 1, wherein the area ratio of said first light-shielding layer section to said second light-shielding layer section is 1 or less.
Claim 6
Dependent Claim
45 words
A color liquid crystal panel according to claim 1, wherein light trying to pass through said color filter films arranged in a predetermined row is completely shielded at both sides of the row by said first light-shielding layer sections and said second light-shielding layer sections.
Claim 7
Dependent Claim
18 words
A color liquid crystal according to claim 1, wherein said first light-shielding layer section is made of metal.
Claim 8
Dependent Claim
32 words
A color liquid crystal panel according to claim 1, wherein said first light-shielding layer section is made of nonmetallic material, and wherein said second light-shielding layer section is made of metallic material.
Claim 9
Dependent Claim
25 words
A color liquid crystal panel according to claim 1, wherein said second light-shielding layer section has a larger area than said first light-shielding layer section.
Claim 10
Dependent Claim
35 words
A color liquid crystal panel according to claim 1 having at least three types of said color filter film, a red color filter film, a green color filter film, and a blue color filter film.
Claim 11
Dependent Claim
51 words
A color liquid crystal panel according to claim 1 having at least four types of said color filter film, a red color filter film, a green color filter film, a blue color filter film, and a white color filter film, the four dots of these color filter films constituting a pixel.
Claim 12
Dependent Claim
119 words
A color liquid crystal panel according to claim 1, wherein said color filter film comprises a first red color filter film, a first green color filter film, a first blue color filter film, a second red color filter film with an area smaller than said first red color filter film, a second green color filter film with an area smaller than said green color filter film, and a second blue color filter film with an area smaller than said first blue color filter film, with the areas corresponding to each of said second red color filter film, said second green color filter film, and said second blue filter film being simultaneously turned on to provide a white color display.
Claim 13
Dependent Claim
149 words
A color liquid crystal panel which has a liquid crystal placed between a first substrate and a second substrate, said first substrate having formed thereon a red color filter film, a green color filter film, and a blue color filter film, and transparent electrodes in correspondence with display pixels, and said second substrate having formed thereto a transparent electrode, wherein said color filter films are formed in one layer, and said first light-shielding layer sections are formed on said first substrate in the same layer as said color filter films, without contacting said color filter films, and wherein second light-shielding layer sections are formed in a layer at the liquid crystal side from said color filter films, so that light trying to pass between color filter films is completely shielded by said first light-shielding layer section and said second light-shielding layer section, or by said second light-shielding layer section.
Claim 14
Dependent Claim
149 words
A color liquid crystal panel which has a liquid crystal placed between a first substrate and a second substrate, said first substrate having formed thereon a red color filter film, a green color filter film, and a blue color filter film, and transparent electrodes in correspondence with display pixels, and said second substrate having formed thereto a transparent electrode, wherein said color filter films are formed in one layer, and said first light-shielding layer sections are formed on said first substrate in the same layer as said color filter films, without contacting said color filter films, and wherein second light-shielding layer sections are formed in a layer at the liquid crystal side from said color filter films, so that light trying to pass between color filter films is completely shielded by said first light-shielding layer section and said second light-shielding layer section, or by said second light-shielding layer section.
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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) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |