Image display and method for displaying image
First Claim
1. An image display apparatus for displaying an image based on an input video signal, comprising:
- a display device for outputting image lights according to a voltage to be applied;
drive means for driving said display device by switching the drive voltage between positive and negative for application based on said input video signal; and
means for suppressing a polarization phenomenon in said display device.
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Accused Products
Abstract
At the time when displaying moving images using liquid crystal panels and others, there is such a problem that tail streaks occur, and resultantly image degradation is caused. In order to solve this problem, an echo suppression circuit 100 divides a video signal into a pair composed of two successive frames for comparison between these two frames in signal level for the purpose of suppressing an echo phenomenon occurring when a liquid crystal panel 108 displays video signals including moving images. If these two frames are not the same in signal level, the signal is accordingly so corrected as to equalize the signal level of those. Based on the video signals and others corrected by the echo suppression circuit 100, a controller 102 operates the liquid crystal panel with Alternating-Current drive through a source driver 104 and a gate driver 106. As such, the drive voltage used to operate the liquid crystal panel with AC drive is so adjusted as to be balanced between positive and negative. In this manner, the tail streaks are prevented when displaying moving images.
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Citations
39 Claims
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1. An image display apparatus for displaying an image based on an input video signal, comprising:
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a display device for outputting image lights according to a voltage to be applied;
drive means for driving said display device by switching the drive voltage between positive and negative for application based on said input video signal; and
means for suppressing a polarization phenomenon in said display device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. An image display method for displaying an image by driving a display device based on an input video signal, comprising:
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a drive step of driving said display device by switching a drive voltage between positive and negative for application based on said input video signal; and
an adjusting step of adjusting said drive voltage by correcting said input video signal or said drive voltage so that absolute values of said drive voltage between positive and negative become closer in at least any two successive frames.
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35. An image display method for displaying an image by driving a display device based on an input video signal, comprising
a drive step of driving said display device by switching a drive voltage between positive and negative for application based on said input video signal, wherein said drive step divides one vertical scanning period of said input video signal into a first sub period and a second sub period, and the drive voltage applied to the sub periods is different in polarity.
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36. An image display method for displaying an image by driving a display device based on an input video signal, comprising
a drive step of driving said display device by switching a drive voltage between positive and negative for application based on said input video signal, wherein said drive step divides one vertical scanning period of said input video signal into a first sub period and a second sub period, and outputs said input video signal in said first sub period, and outputs a compensation signal in said second sub period.
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37. An image display method for displaying an image by driving a display device based on an input video signal, comprising
a drive step of driving said display device by switching a drive voltage between positive and negative for application based on said input video signal, wherein said drive step scans, in an n-th frame, odd-numbered scanning lines for a data signal, and even-numbered scanning lines f or a compensation signal, and scans, in an n-th frame, the odd-numbered scanning lines for the compensation signal, and the even-numbered lines for the data signal.
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38. An image display method for displaying an image by driving a display device based on an input video signal, comprising
a drive step of driving said display device by switching a drive voltage between positive and negative for application based on said input video signal, wherein during one vertical scanning period of said input video signal, after sequentially scanning either ones of odd-numbered scanning lines and even-numbered scanning lines, said drive step sequentially scans the scanning lines.
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39. An image display method for displaying an image by driving a display device based on an input video signal, comprising
a drive step of driving said display device by switching a drive voltage between positive and negative for application based on said input video signal, wherein said drive step applies the drive voltage of the same polarity without polarity reverse to at least any two successive frames.
Specification