US4708440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal display device
Assignee: Hitachi Ltd
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Filing: 1986-02-18
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Granted: 1987-11-24
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Expires: 2006-02-18
Abstract
Abstract In a segment display type multi-color liquid crystal display device, the area of the display surface of the display device except the areas of segment electrodes is formed so as to present a color identical or similar to a color presented by the segment electrodes in an unselected state. Selected segments can be clearly recognized.
Inventors
- 👤 Masaru Kugo
- 👤 Hideyuki Ouchi
- 👤 Kouzou Katogi
- 👤 Osamu Igarashi
- 👤 Seiji Suda
- 👤 Keiichi Tokuyama
- 👤 Hirohisa Yamamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:42
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/13306; G02F1/1343; G02F1/134309; G02F1/134327; G09; G09F; G09F9/00; G09F9/30; G09F9/35
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A liquid crystal display device provided with a plurality of transparent segment electrodes each having at least one color filter thereon, desired ones of the segment electrodes being selected for display; characterized in that an area of a display surface of said liquid crystal display device except areas of said segment electrodes is formed so as to present a color similar to a color presented by the segment electrodes in an unselected state.
Claim 2
Dependent Claim
73 words
A liquid crystal display device provided with a plurality of transparent segment electrodes each having at least one color filter thereon, desired ones of the segment electrodes being selected for display; characterized in that an area of a display surface of said liquid crystal display device except areas of said segment electrodes is formed so as to present a color similar to a color presented by the segment electrodes in an unselected state.
Claim 3
Dependent Claim
42 words
A liquid crystal display device according to claim 1, wherein said each segment electrode is constructed of a plurality of transparent electrode stripes, on which the plurality of color filters transmitting different colors are arranged in a predetermined order of the colors.
Claim 4
Dependent Claim
53 words
A liquid crystal display device according to claim 1, wherein a diffuser is attached behind a liquid crystal cell, and the area of said diffuser except the areas of said segment electrodes is coated so as to present the color similar to the color presented by said segment electrodes in the unselected state.
Claim 5
Dependent Claim
48 words
A liquid crystal display device according to claim 1, wherein the area of a front surface of a display panel except the areas of said segment electrodes is coated so as to present the color similar to the color presented by said segment electrodes in the unselected state.
Claim 6
Dependent Claim
50 words
A liquid crystal display device according to claim 2, wherein among said plurality of stripes constituting said each segment electrode, ones for displaying the colors different from each other are respectively driven by rectangular waves which have duty factors different from each other as previously determined for the different colors.
References Cited (Backward Citations)
DE2415202A1
Cited
US4042294A
Cited
US4196973A
Cited
US4470666A
Cited
US4410887A
Cited
US4519679A
Cited
DE3313804A1
Cited
DE3402469A1
Cited
US4630894A
Cited
EP0121305A2
Cited
US4516834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |