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EP0317261A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid crystal display device for projection apparatus

Assignee: Sony Corp
•
Filing: 1988-11-15
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Granted: —
•
Expires: 2008-11-15
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Abstract

Abstract A liquid crystal display device for projection apparatus having a liquid crystal display panel (1) of a laser heat write-in type, a frame (2) having heaters (7) therein and supporting the liquid crystal display panel (1) and a pair of light transmission panels (11 a , 11 b ) located to sandwich the liquid crystal display panel (1) therebetween with a predetermined spacing from its opposite surfaces, whereby a substantially air-tight space (12) is formed in contact with at least an effective display area on each opposite side of the liquid crystal display panel (1) in cooperation with the frame (2) and the pair of light transmission panels (11 a , 11 b ) so that the air-tight spaces (12) can be held at a predetermined temperature. Thus, at least the effective display area of the liquid crystal display panel can be held at a predetermined bias temperature over substantially the entire surface, reducing the power required for a write-in laser beam and avoiding irregular resolution of an optical image to be displayed.

Inventors

  • 👤 Tetsuya C/O Sony Corp. Morita
  • 👤 Tetsuo C/O Sony Corp. Urabe

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-10 00:49
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/132; G02F1/1333; G02F1/133382

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 128 words
A liquid crystal display device for projection apparatus, comprising: a) a liquid crystal display panel (1) of a laser heat write-in kind; b) a frame (2) having heating means (7) and supporting the liquid crystal display panel (1); and c) a pair of light transmission panels (11 a , 11 b ) respectively located in opposing relation to the opposite outer surfaces of the liquid crystal display panel (1) with a predetermined distance therebetween to form, on each side, a substantially air-tight space (12) in contact with at least an effective display area of the liquid crystal display panel (1) whereby, in cooperation with the frame (2), the light transmission panels (11 a , 11 b ) each hold the respective air-­tight space (12) at a predetermined temperature.
Claim 2
Dependent Claim 128 words
A liquid crystal display device for projection apparatus, comprising: a) a liquid crystal display panel (1) of a laser heat write-in kind; b) a frame (2) having heating means (7) and supporting the liquid crystal display panel (1); and c) a pair of light transmission panels (11 a , 11 b ) respectively located in opposing relation to the opposite outer surfaces of the liquid crystal display panel (1) with a predetermined distance therebetween to form, on each side, a substantially air-tight space (12) in contact with at least an effective display area of the liquid crystal display panel (1) whereby, in cooperation with the frame (2), the light transmission panels (11 a , 11 b ) each hold the respective air-­tight space (12) at a predetermined temperature.
Claim 3
Dependent Claim 32 words
A liquid crystal display device according to claim 1, further comprising an infrared ray absorbing filter (13) provided on the inner surface of one (11 a ) of the light transmission panels.
Claim 4
Dependent Claim 29 words
A liquid crystal display device according to claim 1 or claim 2, wherein one of the light transmission panels (11 a ) itself has an infrared ray absorbing property.
Claim 5
Dependent Claim 48 words
A liquid crystal display device according to claim 2, wherein one (11 a ) of the light transmission panels is located on the side of the liquid crystal display panel opposite to the side from which a laser beam is applied to the liquid crystal display panel (1).
Claim 6
Dependent Claim 53 words
A liquid crystal display device according to claim 3, wherein the light transmission panel (11 a ) having an infrared ray absorbing property is located on the side of the liquid crystal display panel (1) opposite to the side from which a laser beam becomes incident on the liquid crystal display panel (1).

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