Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
2007-02-06
2007-02-06
Nguyen, Jimmy H. (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S096000
Reexamination Certificate
active
10049049
ABSTRACT:
When displaying moving images by using liquid crystal panels and others, a problem exists in that tail streaks occur, and image degradation is resultantly caused. To solve this problem, an echo suppression circuit 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 displays video signals including moving images. If these two frames are not the same in signal level, the signal is accordingly corrected so as to equalize the signal level of these frames. Based on the video signals and others corrected by the echo suppression circuit, a controller operates the liquid crystal panel with AC drive through a source driver and a gate driver. As such, the drive voltage used to operate the liquid crystal panel with AC drive is adjusted so as to be balanced between positive and negative. In this manner, the tail streaks are prevented when displaying moving images.
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Arimoto Katsuyuki
Funamoto Taro
Inoue Kazuo
Kumagawa Katsuhiko
Machidori Wataru
Matsushita Electric - Industrial Co., Ltd.
Nguyen Jimmy H.
Wenderoth , Lind & Ponack, L.L.P.
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