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Image displaying method, image displaying device, and contrast adjusting circuit for use therewith

  • US 20040036703A1
  • Filed: 04/10/2003
  • Published: 02/26/2004
  • Est. Priority Date: 08/22/2002
  • Status: Active Grant
First Claim
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1. A method of converting an analog video signal into a digital video signal to display an image, the method comprising:

  • detecting information about an average brightness level of a digital luminance signal that has been subjected to analog-to-digital conversion;

    determining the quantity of correction in response to the average brightness level; and

    based on the quantity of correction, by which black-correction processing which decreases a brightness level by offsetting the brightness level to the minus side is performed for an analog luminance signal before the A/D conversion or the digital luminance signal after the A/D conversion, and in association with the brightness level decreased by black-correction processing, a contrast gain is increased within a dynamic range;

    whereby contrast is adjusted before displaying an image.

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