US4568149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display panel with opaque mask over gate or signal line
Assignee: Canon Inc
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Filing: 1984-01-19
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Granted: 1986-02-04
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Expires: 2004-01-19
Abstract
Abstract A display panel comprises a pair of electrode plates oppositely spaced from each other. One of the electrode plates has switching elements provided with gate lines and source lines, and the other electrode plate has counter electrodes thereon. At least one of the pair of electrode plates is provided along at least one of gate lines and the source lines with non-transmissive members, and spacer members are provided between the pair of electrode plates along the non-transmissive members.
Inventors
- 👤 Masao Sugata
- 👤 Yuko Miyajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:59
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/1368; G02F1/1333; G02F1/1339; G02F1/13394; G02F1/136209; G02F1/13392
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
107 words
In a display panel comprising a pair of electrode plates oppositely spaced from each other, one electrode plate having switching elements provided with gate lines and source lines, the other electrode plate having a counter electrode thereon, the improvement wherein: (a) at least one of said pair of electrode plates is provided with a non-transmissive member along at least one of said gate lines and said source lines, said non-transmissive member being formed as a stripe having substantially the same width as one of the gate lines or source lines, and (b) a spacer member is interposed between said pair of electrode plates along said non-transmissive member.
Claim 2
Dependent Claim
107 words
In a display panel comprising a pair of electrode plates oppositely spaced from each other, one electrode plate having switching elements provided with gate lines and source lines, the other electrode plate having a counter electrode thereon, the improvement wherein: (a) at least one of said pair of electrode plates is provided with a non-transmissive member along at least one of said gate lines and said source lines, said non-transmissive member being formed as a stripe having substantially the same width as one of the gate lines or source lines, and (b) a spacer member is interposed between said pair of electrode plates along said non-transmissive member.
Claim 3
Dependent Claim
19 words
A display panel according to claim 1, wherein a liquid crystal is interposed between said pair of electrode plates.
Claim 4
Dependent Claim
16 words
A display panel according to claim 2, wherein said liquid crystal is a nematic liquid crystal.
Claim 5
Dependent Claim
17 words
A display panel according to claim 1, wherein said non-transmissive member is formed of a metallic film.
Claim 6
Dependent Claim
16 words
A display panel according to claim 1, wherein said metallic film is a film of chromium.
Claim 7
Dependent Claim
50 words
A display panel according to claim 1, wherein said switching element is comprised of a thin film transistor comprising a gate electrode, a thin film semiconductor insulated from said gate electrode with an insulating film, and a source electrode and a drain electrode respectively connected to said thin film semiconductor.
Claim 8
Dependent Claim
15 words
A display panel according to claim 6, wherein said thin film semiconductor comprises amorphous silicon.
Claim 9
Dependent Claim
21 words
A display panel according to claim 1, wherein said spacer member is formed in a size smaller than a display unit.
Claim 10
Dependent Claim
47 words
A display panel according to claim 1, wherein said spacer member has been produced by forming a film of an insulating material on at least one of electrode plates, and then etching the film of a insulating material except for the portion thereof forming the spacer member.
Claim 11
Dependent Claim
14 words
A display panel according to claim 9, wherein said insulating material comprises a resin.
Claim 12
Dependent Claim
98 words
In a display panel comprising first and second electrode plates oppositely spaced from each other, and a liquid crystal interposed between said first and second electrode plates; said first electrode plate having switching elements provided with gate lines, source lines and drain electrodes constituting display units, said second electrode plate having a counter electrode thereon; the improvement wherein said second electrode plate comprises color filters disposed to face said drain electrodes, and a non-transmissive metallic film disposed between an adjacent pair of said color filters and along at least one of said gate lines and said source lines.
Claim 13
Dependent Claim
98 words
In a display panel comprising first and second electrode plates oppositely spaced from each other, and a liquid crystal interposed between said first and second electrode plates; said first electrode plate having switching elements provided with gate lines, source lines and drain electrodes constituting display units, said second electrode plate having a counter electrode thereon; the improvement wherein said second electrode plate comprises color filters disposed to face said drain electrodes, and a non-transmissive metallic film disposed between an adjacent pair of said color filters and along at least one of said gate lines and said source lines.
Claim 14
Dependent Claim
22 words
A display panel according to claim 11, wherein one of said color filters has a color selected from blue, green and red.
Claim 15
Dependent Claim
20 words
A display panel according to claim 11, wherein said non-transmissive metallic film is a film of chromium, aluminum or molybdenum.
References Cited (Backward Citations)
JPS5625174A
Cited
US4448491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |