低残像ディジタル液晶テレビの開発

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  • Development of a Low Image-Lag Digital Liquid Crystal TV.
  • テイ ザンゾウ ディジタル エキショウ テレビ ノ カイハツ

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A new low image-lag digital liquid crystal TV has been developed. In conventional LCTVs, image lags occur due to the low response time of a liquid crystal material. Using the new low image-lag drive method (L. A. O) that emphasizes moving parts of the image, the response time was improved from 60 ms to 17 ms, or in other words, 40% to 10% in terms of an image-lag after one field, which is sufficient for TV specifications. This method also improved the vertical resolution degraded by an intra-field interpolated-type non-interlaced drive method. In addition, in order to reduce noise produced by this method, a noise reduction method has been proposed. This method has a motion detector and the L. A. o method works under the condition that moving images are detected. Using this method, the maximum improvement in S/N ratio was about 10 dB. As a result, a high-image quality 10.4 inch LCTV has been developed. The brightness was 400 cd/m2 and we can see images even in an illuminated room.

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