Patent EP0171202A2 successfully refreshed from Google Patents.
EP0171202A2
Expired / Lapsed
EP
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Thermal imager
Assignee: STC PLC
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Filing: 1985-07-10
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Granted: —
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Expires: 2005-07-10
Abstract
Abstract The display system of a thermal imager operating in chopped mode is provided by a matrix addressed crystal display cell which, without recourse to any special separate signal storage and signal processing stage, automatically performs frame-to-frame subtraction by virtue of its square law response.
Inventors
- 👤 Peter William Ross
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 21:48
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/20; H04N23/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A thermal imager adapted to operate in chopped mode so as to produce a video signal output in which the alternate frames are inverted with respect to the intervening frames, characterised in that the video output is applied to a matrix addressed liquid crystal display device capable of grey scale representation, which display device is adapted to perform frame-to-frame subtraction by virtue of its square law response to drive voltage across its pixels.
Claim 2
Dependent Claim
73 words
A thermal imager adapted to operate in chopped mode so as to produce a video signal output in which the alternate frames are inverted with respect to the intervening frames, characterised in that the video output is applied to a matrix addressed liquid crystal display device capable of grey scale representation, which display device is adapted to perform frame-to-frame subtraction by virtue of its square law response to drive voltage across its pixels.
References Cited (Backward Citations)
No citation records indexed.
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