Patent EP0730371A2 successfully refreshed from Google Patents.
EP0730371A2
Expired / Lapsed
EP
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Liquid crystal display device
Assignee: Sony Corp
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Filing: 1996-02-15
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Granted: —
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Expires: 2016-02-15
Abstract
Abstract A liquid crystal display apparatus comprising an amplitude detecting unit for detecting an amplitude of a supplied video signal; a liquid crystal display for displaying an image on a main surface based on the video signal; a backlight for giving off light with a luminance which can be freely set from the back surface of the liquid crystal display to the main surface; and a luminance setting unit for variably setting the luminance of the backlight based on the amplitude detected by the amplitude detecting unit.
Inventors
- 👤 Kensuke Motomura
- 👤 Susumu Tsuchida
- 👤 Yoshihide Nagatsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:38
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/66; H04N5/70; G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/3406; G09G2320/00; G09G2320/06; G09G2320/0626; G09G2320/0646; G09G2330/00; G09G2330/02; G09G2330/021; G09G2330/022; G09G2360/00; G09G2360/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A liquid crystal display apparatus comprising: an amplitude detecting means (14) for detecting an amplitude of a supplied video signal; a liquid crystal display (10) for displaying an image on its main surface based on the video signal; a backlight (8) for emitting a light from the back surface of the liquid crystal display to the main surface, characterised in that said backlight (8) has a variably settable luminance; and a setting means (9) for variably setting the luminance of the backlight (8) based on the amplitude detected by the amplitude detecting means (14).
Claim 2
Dependent Claim
60 words
A liquid crystal display apparatus according to claim 1, further comprising: an amplifier (12) for amplifying the video signal and having a selectably variable amplification rate; wherein the setting means (9) is adapted to variably set the luminance of the backlight (8) and the amplification rate of the amplifier (12) based on the amplitude detected by the amplitude detecting means.
Claim 3
Dependent Claim
61 words
A liquid crystal display apparatus according to claim 1 or 2, further comprising: a time counting means (13) for counting a time of continuation of a non-signal level of the supplied video signal; wherein the setting means (9) is adapted to variably set the luminance of the backlight (8) based on the continuation time counted by the time counting means (13).
Claim 4
Dependent Claim
59 words
A liquid crystal display apparatus according to claim 1, 2 or 3, further comprising: a transitory signal detecting means (15) for detecting the transitory state of the supplied video signal; wherein the setting means (9) is adapted to variably set the luminance of the backlight (8) when the transitory state is detected by the transitory signal detecting means (15).
Claim 5
Dependent Claim
99 words
A liquid crystal display apparatus comprising: a time counting means (13) for counting a time of continuation of a non-signal level of the supplied video signal; a liquid crystal display (10) for displaying an image on its main surface based on the video signal; a backlight (8) for emitting a light from the back surface of the liquid crystal display (10) to the main surface, said backlight having a variably settable luminance; and a luminance setting means (9) for variably setting the luminance of the backlight (8) based on the continuation time counted by the time counting means (13).
Claim 6
Dependent Claim
97 words
A liquid crystal display apparatus comprising: a transitory signal detecting means (15) for detecting the transitory state of the supplied video signal; a liquid crystal display (10) for displaying an image on its main surface based on the video signal; a backlight (8) for emitting a light from the back surface of the liquid crystal display (10) to the main surface, said backlight (8) having a variably settable luminance; and a luminance setting means (9) for variably setting the luminance of the backlight (8) when the transitory state is detected by the transitory signal detecting means (15).
References Cited (Backward Citations)
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