Patent US5708486A successfully refreshed from Google Patents.
US5708486A
Expired / Lapsed
US
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LCD having a shading layer exhibiting a different reflection characteristic from reflection electrodes
Assignee: Canon Inc
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Filing: 1996-09-16
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Granted: 1998-01-13
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Expires: 2016-09-16
Abstract
Abstract A display unit comprises a first substrate having a display area including a plurality of reflection electrodes with a gap portion formed therebetween and a peripheral portion around the display area, a second substrate opposing the first substrate and having a transparent electrode, and a liquid crystal material being put between the first and second substrates. The first substrate has a shading layer at at least part of the gap portion and the peripheral portion. The shading layer exhibits a different reflection characteristic from the reflection electrodes.
Inventors
- 👤 Mamoru Miyawaki
- 👤 Saburo Sugawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:28
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133553; G02F1/136; G02F1/1362; G02F1/136209; G02F1/136277
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
90 words
A display unit comprising a first substrate having a display area including a plurality of reflection electrodes with a gap portion formed therebetween and a peripheral portion around the display area, a second substrate opposing said first substrate and having a transparent electrode, and a liquid crystal material being put between said first and second substrates, wherein said first substrate has a shading layer at at least part of said gap portion and said peripheral portion, and wherein said shading layer exhibits a different reflection characteristic from said reflection electrodes.
Claim 2
Dependent Claim
90 words
A display unit comprising a first substrate having a display area including a plurality of reflection electrodes with a gap portion formed therebetween and a peripheral portion around the display area, a second substrate opposing said first substrate and having a transparent electrode, and a liquid crystal material being put between said first and second substrates, wherein said first substrate has a shading layer at at least part of said gap portion and said peripheral portion, and wherein said shading layer exhibits a different reflection characteristic from said reflection electrodes.
Claim 3
Dependent Claim
28 words
The display unit according to claim 1, wherein said first substrate has an insulation layer between said reflection electrodes and said shading layer to form a holding capacitor.
Claim 4
Dependent Claim
27 words
The display unit according to claim 1, wherein said shading layer is composed of a different material from said reflection electrodes to exhibit the different reflection characteristic.
Claim 5
Dependent Claim
33 words
The display unit according to claim 3, wherein said reflection electrodes are composed primarily of Al and said shading layer is composed primarily of a material selected from Ti, TiN, W and Mo.
Claim 6
Dependent Claim
26 words
The display unit according to claim 1, wherein said shading layer has a different surface roughness from said reflection electrodes to exhibit the different reflection characteristic.
Claim 7
Dependent Claim
27 words
The display unit according to claim 1, wherein said shading layer reflects light to a different direction from said reflection electrodes to exhibit the different reflection characteristic.
Claim 8
Dependent Claim
20 words
The display unit according to claim 6, wherein said shading layer has a different surface angle from said reflection electrode.
Claim 9
Dependent Claim
57 words
The display unit according to claim 7, wherein, let the angle between the surfaces of said reflection electrodes and the surface of said shading layer be θ, let the refractive index of said liquid crystal material be n, and let the F-number of an optical projection system be F, and θ satisfies any of the followings: ##EQU3##
Claim 10
Dependent Claim
14 words
The display unit according to claim 8, wherein said θ is 10° to 30°.
Claim 11
Dependent Claim
29 words
The display unit according to claim 6, wherein said first substrate has a thick insulation layer under said reflection electrodes and a thin insulation layer at the gap portion.
Claim 12
Dependent Claim
58 words
The display unit according to claim 6, wherein said first substrate has a signal line in a plane below said reflection electrodes and a plurality of wiring layers with a gap space formed therebetween in the same plane as the signal line, and wherein said gap space is wider under said gap portion than under said reflection electrodes.
Claim 13
Dependent Claim
24 words
The display unit according to claim 6, wherein edges of said reflection electrodes adjoining each other are asymmetric to the pixel boundary plane therebetween.
Claim 14
Dependent Claim
19 words
The display unit according to claim 6, wherein said transparent electrode has a different angle from said reflection electrodes.
Claim 15
Dependent Claim
45 words
The display unit according to claim 6, wherein said first substrate has a plurality of scanning lines, a plurality of signal lines intersecting with said scanning lines, and a plurality of pixel switches located in the intersections of said scanning lines and said signal lines.
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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) | 2001-01-12 | 2001-07-14 | 2002-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-01-12 | 2005-07-14 | 2006-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-01-12 | 2009-07-14 | 2010-01-13 | $7700.00 | Window Closed / Lapsed |