EP0241562A1
Expired / Lapsed
EP
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Liquid crystal display device
Assignee: Sanyo Electric Co Ltd
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Filing: 1986-10-16
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Granted: —
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Expires: 2006-10-16
Abstract
Abstract A liquid crystal display device in which video signals are applied to drive a liquid crystal panel that consists of a plurality of display picture elements arranged in the form of a matrix, the polarities of the video signals being reversed for at least one adjacent display picture element in at least the same row and/or for at least one horizontal scanning period, in order to visually compensate the flickering on the whole surface of the liquid crystal panel.
Inventors
- 👤 Atsuyoshi 5-2-26 Aoyamadai Tanioka
- 👤 Tatsuo 5-2-25 Aoyamadai Katagishi
- 👤 Hajime 2-6-10 Itayado-Cho Takesada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 02:51
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/66; G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3614; G09G3/3648; G09G3/3655; H04N3/00; H04N3/10; H04N3/12; H04N3/127; G09G2320/00; G09G2320/02; G09G2320/0247
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
(1) A liquid-crystal display apparatus comprising a liquid-crystal panel which has a plurality of display picture elements arranged alternatively with one column to be selected at the odd field and the other column to be selected at the even field, is driven through application of picture signals to be reversed in polarity at the field period, a first polarity reversing circuit for reversing the polarity of said picture signal to be applied upon said liquid-crystal panel for each display element of at least. one or more adjacent within at least the same column.
Claim 2
Dependent Claim
85 words
(2) A liquid-crystal display apparatus comprising a liquid-crystal panel which has a plurality of display picture elements arranged alternatively with one column to be selected at the odd field and the other column to be selected at the even field, is driven through application of picture signals to be reversed in polarity at the field period, a second polarity reversing circuit for reversing the polarity of said picture signal to be applied upon said liquid-crystal panel for at least one horizontal scanning period or more.
Claim 3
Dependent Claim
122 words
(3) A liquid-crystal display apparatus comprising a liquid-crystal panel which has a plurality of display picture elements arranged alternatively with one column to be selected at the odd field and the other column to be selected at the even field, is driven through application of picture signals to be reversed in polarity at the field period, a first polarity reversing circuit for reversing the polarity of said picture signal to be applied upon said liquid-crystal panel for each display element of at least one or more adjacent within at least the same column, a second polarity reversing circuit for reversing the polarity of said picture signal to be applied upon said liquid-crystal panel for at least one horizontal scanning period or more.
Claim 4
Dependent Claim
119 words
(4) A driving circuit for a liquid-crystal display apparatus comprising a liquid-crystal panel which has a plurality of display picture elements disposed in columns and rows, is driven through application of picture signals to be reversed in polarity at the field period, a third polarity reversing circuit for reversing for the given period the polarity of the picture signal to be applied upon said liquid-crystal panel, a circuit for feeding the first or the second DC voltage selected for the given period the opposite electrode of said liquid crystal, a brilliance level adjusting circuit for simultaneously varying said first and second DC voltage mutually in the opposite direction so as to adjust the brilliance level of said picture signal.
References Cited (Backward Citations)
No citation records indexed.
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