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Patent EP0127701A1 successfully refreshed from Google Patents.
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EP0127701A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Apparatus for projecting a light image

Assignee: Datelcare BV
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Filing: 1983-06-07
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Granted: —
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Expires: 2003-06-07
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Abstract

Abstract An apparatus for projecting a light image comprises a light source (2) and a projection lens (5). A polarising liquid crystal display means 17) is positioned in the beam path from the light source (2) to the projection lens (5). said liquid crystal display means (7) comprising a number of controllable picture elements. The liquid crystal display means (7) is located between a polarizer (8) and an analyser (9). A control unit (14) for controlling the picture elements is connected to the liquid crystal display means (7), which control unit comprises a micro-processor (16) adapted to be coupled with a computer. Thereby, the apparatus can project light images determined by data stored in the computer.

Inventors

  • 👤 Robert Pierre Nicolaas Dr. Bronckers

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-28 13:20
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/132; G09; G09F; G09F19/00; G09F19/12; G09F19/18

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 85 words
1 . Apparatus for projecting a light image,comprising a light source and a projection lens, characterized by a polarizing liquid crysta? display means with a number of controllable picture elements, said liquid crystal display means being positioned between a polarizer and an analyser in the beam path from the light source to the projection lens, and by a control unit connected to the liquid crystal display means for controlling the picture elements, said control unit including a microprocessor adapted to be coupled with a computer.
Claim 2
Dependent Claim 85 words
1 . Apparatus for projecting a light image,comprising a light source and a projection lens, characterized by a polarizing liquid crysta? display means with a number of controllable picture elements, said liquid crystal display means being positioned between a polarizer and an analyser in the beam path from the light source to the projection lens, and by a control unit connected to the liquid crystal display means for controlling the picture elements, said control unit including a microprocessor adapted to be coupled with a computer.
Claim 3
Dependent Claim 23 words
Apparatus according to claim 1, characterized in that a heat filter and an ultraviolet filter are provided between the polarizer and the analyser.
Claim 4
Dependent Claim 27 words
Apparatus according to claim 2, characterized in that both said filters, the polarizer, the analyser and the liquid crystal display means are mounted in a common holder.

References Cited (Backward Citations)

FR2164225A5 Cited
GB1488153A Cited
DE2555859A1 Cited
DE3142664A1 Cited

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