Patent US3811751A successfully refreshed from Google Patents.
US3811751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-illuminated liquid crystal display panel
Assignee: Raytheon Co
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Filing: 1973-04-02
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Granted: 1974-05-21
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Expires: 1993-04-02
Abstract
Abstract A self-illuminated liquid crystal display panel has an electroluminescent panel behind a liquid crystal layer with two layers of micro-louvered light control film sandwiched between the panel and the liquid crystal layer in order to direct the light prior to selective scattering in activated regions of the liquid crystal. The embodiments show dark information on a bright background and bright information on a dark background.
Inventors
- 👤 G Myer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:17
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133524; G02F1/1336; G02F1/133602
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
A self-illuminated display comprising: a layer of liquid crystal for selectively scattering light; light source means for providing an evenly distributed source of light, said means being spaced apart from said liquid crystal layer; a first layer of light control film sandwiched between said light source means and said liquid crystal layer, said light control film having a plurality of generally parallel microlouvers set at an angle with respect to a face of said film for directing the light from said light source means in a first orientation plane parallel to said micro-louvers; and a second layer of light control film also sandwiched between said light source means and said liquid crystal layer, said second layer having its micro-louvers set parallel to a second orientation plane intersecting said first orientation plane.
Claim 2
Dependent Claim
131 words
A self-illuminated display comprising: a layer of liquid crystal for selectively scattering light; light source means for providing an evenly distributed source of light, said means being spaced apart from said liquid crystal layer; a first layer of light control film sandwiched between said light source means and said liquid crystal layer, said light control film having a plurality of generally parallel microlouvers set at an angle with respect to a face of said film for directing the light from said light source means in a first orientation plane parallel to said micro-louvers; and a second layer of light control film also sandwiched between said light source means and said liquid crystal layer, said second layer having its micro-louvers set parallel to a second orientation plane intersecting said first orientation plane.
Claim 3
Dependent Claim
25 words
The display of claim 1 having a viewing axis intersecting both of said orientation planes, whereby a light image on a dark background is obtainable.
Claim 4
Dependent Claim
32 words
The display of claim 2 wherein said micro-louvers are set at an acute angle with respect to the face of said film and wherein said viewing axis is perpendicular to said film.
Claim 5
Dependent Claim
180 words
A self-illuminated planar display having a viewing axis intersecting said display at a predetermined angle, said display comprising: a layer of liquid crystal; a pair of electrodes for inducing electric current in selected portions of said liquid crystal whereby light may be selectively scattered by said liquid crystal; an electroluminescent panel for providing an evenly distributed source of light, said panel being spaced apart from said liquid crystal layer and oriented parallel therewith; a layer of light control film sandwiched between said electroluminescent panel and said liquid crystal layer, said light control film having a plurality of generally parallel micro-louvers set at an angle with respect to a face of said film wherein said micro-louvers are generally parallel with a first orientation plane having said viewing axis defined thereon whereby a dark image on a light background is obtainable; and a second layer of light control film also sandwiched between said electroluminescent panel and said liquid crystal layer, said second layer having its micro-louvers set parallel to a second orientation plane intersecting about said viewing axis said first orientation plane.
Claim 6
Dependent Claim
180 words
A self-illuminated planar display having a viewing axis intersecting said display at a predetermined angle, said display comprising: a layer of liquid crystal; a pair of electrodes for inducing electric current in selected portions of said liquid crystal whereby light may be selectively scattered by said liquid crystal; an electroluminescent panel for providing an evenly distributed source of light, said panel being spaced apart from said liquid crystal layer and oriented parallel therewith; a layer of light control film sandwiched between said electroluminescent panel and said liquid crystal layer, said light control film having a plurality of generally parallel micro-louvers set at an angle with respect to a face of said film wherein said micro-louvers are generally parallel with a first orientation plane having said viewing axis defined thereon whereby a dark image on a light background is obtainable; and a second layer of light control film also sandwiched between said electroluminescent panel and said liquid crystal layer, said second layer having its micro-louvers set parallel to a second orientation plane intersecting about said viewing axis said first orientation plane.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |