Video display device that stretches a video signal and a signal of the light source and television receiving device
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United States of America Patent
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Feb 24, 2015
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app pub date -
Jun 27, 2012
filing date -
Nov 11, 2011
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Abstract
A video display device increases a feeling of brightness and expresses a video with high contrast by detecting a part of a video signal that emits light, enhancing the display luminance of the light-emitting part, and displaying the part. A light emission detection portion (1) uses a prescribed feature quantity related to the brightness of an input video signal, predetermines the light emission quantity for the video signal on the basis of the relationship with the feature quantity, and detects the light emission quantity for each input video signal frame from the feature quantity. A backlight luminance stretch portion (3) stretches the light source luminance of the backlight according to the light emission quantity detected. A video signal luminance stretch portion (6) stretches the video signal according to the light emission quantity or the luminance distribution of the input video signal.
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