US4922239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-shade color liquid crystal display apparatus
Assignee: Hitachi Ltd
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Filing: 1988-01-28
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Granted: 1990-05-01
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Expires: 2008-01-28
Abstract
Abstract A multi-shade color liquid crystal display apparatus wherein a number of striped color liquid crystal elements are arranged in parallel in one direction. A color filter for each color liquid crystal element is arbitrarily selected to have one color and the ratios of the widths of the color filters to the pitches of the filters for each of a plurality of blocks of the striped color liquid crystal elements are made different from one another while maintaining one of the widths and pitches constant so that light and dark shades of the color are obtained in different blocks.
Inventors
- 👤 Masaru Kugo
- 👤 Hiroshi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:01
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/1313; G02F1/1335; G02F1/133509; G02F1/133514
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A multi-shade color liquid crystal display apparatus comprising a number of striped color liquid crystal element portions formed by striped light transparent control portions having color filters of the same predetermined color which cover the striped light transparent control portions, respectively, and which are arranged in parallel with a pitch in one direction, wherein ratios of widths of said color filters to said pitch are different in respective ones of at least two blocks of said striped color liquid crystal element portions a one of the widths of said color filters and said pitch being constant in said at least two blocks, and light and dark shades of said predetermined color to be displayed are effected by the difference in said ratios in different ones of said blocks.
Claim 2
Dependent Claim
128 words
A multi-shade color liquid crystal display apparatus comprising a number of striped color liquid crystal element portions formed by striped light transparent control portions having color filters of the same predetermined color which cover the striped light transparent control portions, respectively, and which are arranged in parallel with a pitch in one direction, wherein ratios of widths of said color filters to said pitch are different in respective ones of at least two blocks of said striped color liquid crystal element portions a one of the widths of said color filters and said pitch being constant in said at least two blocks, and light and dark shades of said predetermined color to be displayed are effected by the difference in said ratios in different ones of said blocks.
Claim 3
Dependent Claim
21 words
A color liquid crystal display apparatus according to claim 1, wherein said widths of said color filters differ between said block.
Claim 4
Dependent Claim
17 words
A color liquid crystal display apparatus according to claim 1, wherein said pitch differ between said blocks.
Claim 5
Dependent Claim
36 words
A color liquid crystal display apparatus according to claim 2, wherein each block is constituted by a different ratio of the width of said strip type transparent control portion to the width of said color 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) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |