US4139271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device
Assignee: Seiko Instruments Inc
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Filing: 1976-11-09
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Granted: 1979-02-13
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Expires: 1996-11-09
Abstract
Abstract A liquid crystal display device comprised of a liquid crystal panel unit having first and second polarizing plates disposed on opposite sides thereof. The polarizing plates have respective polarizing axes having relative orientations differing by 90°. One of the polarizing plates has a minor region having a polarizing axis oriented in parallel with that of the other of the polarizing plates. The liquid crystal panel unit has disposed thereon an electrode in registration with the minor region of the polarizing plate and which receives in use an electrical potential for independently controlling the light transmissive properties of The portion of the stacked combination of the liquid crystal panel unit and the first and second polarizing plates that is in registration with the minor region.
Inventors
- 👤 Kazuhiro Yoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133528
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
243 words
A display device, comprising: first and second glass plates disposed in a stacked condition for defining a liquid crystal panel unit; liquid crystal material disposed between said first and second glass plates and responsive to an electrical field applied thereto for changing polarization of light passing through said liquid crystal material; first and second polarizing plates respectively disposed above and below said liquid crystal panel unit and in a stacked condition therewith, said first and said second polarizing plates having respective polarizing axes having relative orientations differing by 90°, and said second polarizing plate having a hexagonal shaped minor region having a polarizing axis oriented parallel to the polarizing axis of said first polarizing plate and differing by 90° from the polarizing axis of the major portion of said second polarizing plate; six wedge-shaped electrodes disposed symmetrically in a hexagonal pattern on said liquid crystal panel unit in registration with said hexagonal shaped minor region of said second polarizing plate for receiving electrical potentials to apply to said liquid crystal material in registration with said hexagonal shaped minor region electrical fields independent of an electrical field applied to the remainder of said liquid crystal material for independently controlling the light transmissive properties of the portion of the stacked combination of said liquid crystal panel unit and said first and second polarizing plates that is in registration with said hexagonal shaped minor region; and a reflecting plate disposed opposite one of said polarizing plates.
Claim 2
Dependent Claim
243 words
A display device, comprising: first and second glass plates disposed in a stacked condition for defining a liquid crystal panel unit; liquid crystal material disposed between said first and second glass plates and responsive to an electrical field applied thereto for changing polarization of light passing through said liquid crystal material; first and second polarizing plates respectively disposed above and below said liquid crystal panel unit and in a stacked condition therewith, said first and said second polarizing plates having respective polarizing axes having relative orientations differing by 90°, and said second polarizing plate having a hexagonal shaped minor region having a polarizing axis oriented parallel to the polarizing axis of said first polarizing plate and differing by 90° from the polarizing axis of the major portion of said second polarizing plate; six wedge-shaped electrodes disposed symmetrically in a hexagonal pattern on said liquid crystal panel unit in registration with said hexagonal shaped minor region of said second polarizing plate for receiving electrical potentials to apply to said liquid crystal material in registration with said hexagonal shaped minor region electrical fields independent of an electrical field applied to the remainder of said liquid crystal material for independently controlling the light transmissive properties of the portion of the stacked combination of said liquid crystal panel unit and said first and second polarizing plates that is in registration with said hexagonal shaped minor region; and a reflecting plate disposed opposite one of said polarizing plates.
Claim 3
Dependent Claim
251 words
A display device, comprising: first and second glass plates disposed in a stacked condition for defining a liquid crystal panel unit; liquid crystal material disposed between said first and second glass plates and responsive to an electrical field applied thereto for changing polarization of light passing through said liquid crystal material; first and second polarizing plates respectively disposed above and below said liquid crystal panel unit and in a stacked condition therewith, said first and said second polarizing plates having respective polarizing axes having relative orientations differing by 90°, and said second polarizing plate having a hexagonal shaped minor region having a polarizing axis oriented parallel to the polarizing axis of said first polarizing plate and differing by 90° from the polarizing axis of the major portion of said second polarizing plate; six diamond-shaped electrodes disposed symmetrically in a star pattern having points extending beyond said hexagonal minor region on said liquid crystal panel unit in registration with said hexagonal shaped minor region of said second polarizing plate for receiving electrical potentials to apply to said liquid crystal material in registration with said hexagonal shaped minor region electrical fields independent of an electrical field applied to the remainder of said liquid crystal material for independently controlling the light transmissive properties of the portion of the stacked combination of said liquid crystal panel unit and said first and second polarizing plates that is in registration with said hexagonal shaped minor region; and a reflecting plate disposed opposite one of said polarizing plates.
Claim 4
Dependent Claim
251 words
A display device, comprising: first and second glass plates disposed in a stacked condition for defining a liquid crystal panel unit; liquid crystal material disposed between said first and second glass plates and responsive to an electrical field applied thereto for changing polarization of light passing through said liquid crystal material; first and second polarizing plates respectively disposed above and below said liquid crystal panel unit and in a stacked condition therewith, said first and said second polarizing plates having respective polarizing axes having relative orientations differing by 90°, and said second polarizing plate having a hexagonal shaped minor region having a polarizing axis oriented parallel to the polarizing axis of said first polarizing plate and differing by 90° from the polarizing axis of the major portion of said second polarizing plate; six diamond-shaped electrodes disposed symmetrically in a star pattern having points extending beyond said hexagonal minor region on said liquid crystal panel unit in registration with said hexagonal shaped minor region of said second polarizing plate for receiving electrical potentials to apply to said liquid crystal material in registration with said hexagonal shaped minor region electrical fields independent of an electrical field applied to the remainder of said liquid crystal material for independently controlling the light transmissive properties of the portion of the stacked combination of said liquid crystal panel unit and said first and second polarizing plates that is in registration with said hexagonal shaped minor region; and a reflecting plate disposed opposite one of said polarizing plates.
References Cited (Backward Citations)
US3538322A
Cited
US3874163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |