US5537233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct-vision/projection type liquid-crystal display having light source at the edge of a gap between two liquid crystal panels
Assignee: Sanyo Electric Co Ltd
•
Filing: 1994-11-16
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Granted: 1996-07-16
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Expires: 2014-11-16
Abstract
Abstract In a display housing, first and Second liquid-crystal panels are disposed in parallel with each other, and a fluorescent lamp is positioned beside both ends of a gap between these panels. Thus, when used for a transmission type display, e.g. an OHP, the first liquid-crystal panel for light shutter is set in a transmission condition to transmit light from a light source for the OHP or the like and to irradiate the second liquid-crystal panel for displaying an image, thereby projecting the image in a magnified size onto a screen or the like. When used for a direct-vision type display, e.g. a monitor for a personal computer or the like, the first liquid-crystal panel is set in a shading condition to effect diffuse reflection of light from the fluorescent lamp by the first liquid-crystal panel and to irradiate the second liquid-crystal panel, thereby providing a direct-vision image.
Inventors
- 👤 Norio Miura
- 👤 Hisao Uehara
- 👤 Atsuyoshi Tanioka
- 👤 Kazuhiko Moriwaki
- 👤 Makoto Shimizu
- 👤 Masahiro Okuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1347; G02F1/13476; G02F1/1335; G02F1/1336; G02F1/133615; G02F1/133626; G02F1/133627
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A liquid-crystal display for showing a desired image by applying voltage to a liquid crystal to adjust the quantity of transmitted light, characterized by: a first liquid-crystal panel which is configured by holding a liquid-crystal layer or a layer containing liquid crystal between a pair of substrates and driven as light shutter, a second liquid-crystal panel which is configured by holding a liquid-crystal layer or a layer containing liquid crystal between another pair of substrates, disposed at a prescribed space in parallel with said first liquid-crystal panel and driven to display an image, and a lighting means which is disposed at ends of a gap between said first and second liquid-crystal panels and emits light between said first and second liquid-crystal panels.
Claim 2
Dependent Claim
122 words
A liquid-crystal display for showing a desired image by applying voltage to a liquid crystal to adjust the quantity of transmitted light, characterized by: a first liquid-crystal panel which is configured by holding a liquid-crystal layer or a layer containing liquid crystal between a pair of substrates and driven as light shutter, a second liquid-crystal panel which is configured by holding a liquid-crystal layer or a layer containing liquid crystal between another pair of substrates, disposed at a prescribed space in parallel with said first liquid-crystal panel and driven to display an image, and a lighting means which is disposed at ends of a gap between said first and second liquid-crystal panels and emits light between said first and second liquid-crystal panels.
Claim 3
Dependent Claim
52 words
A liquid-crystal display according to claim 1, wherein said liquid-crystal display is used as a projection type by increasing the light transmittance of said first liquid-crystal panel, or said liquid-crystal display is used as a direct-vision type by lowering the light transmittance of said first liquid-crystal panel and operating said lighting means.
Claim 4
Dependent Claim
41 words
A liquid-crystal display according to claim 2, wherein the light transmittance of said first liquid-crystal panel can be controlled for each area, and said area is controlled to control a display area of the display screen of said second liquid-crystal panel.
Claim 5
Dependent Claim
18 words
A liquid-crystal display according to claim 1, wherein said first and second liquid-crystal panels have the same structure.
Claim 6
Dependent Claim
32 words
A liquid-crystal display according to claim 1, wherein at least said first liquid-crystal panel is structured by holding a composite film containing liquid crystal and a polymer between said pair of substrates.
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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) | 1999-07-16 | 2000-01-15 | 2000-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-16 | 2004-01-15 | 2004-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-16 | 2008-01-15 | 2008-07-16 | $7700.00 | Window Closed / Lapsed |