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Compensator for color-television receivers for chromaticity variations in ambient light

  • US 3,200,193 A
  • Filed: 08/30/1961
  • Issued: 08/10/1965
  • Est. Priority Date: 12/08/1960
  • Status: Expired due to Term
First Claim
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1. A COLOR-TELEVISION RECEIVER HAVING APPARATUS TO COMPENSATE FOR CHANGES IN THE AMBIENT LIGHT WHICH AFFECT THE SUBJECTIVE IMPRESSION A VIEWER HAS OF THE REPRODUCED IMAGE, COMPRISING:

  • AN IMAGE REPRODUCING DEVICE;

    MEANS FOR DEVELOPING A LUMINANCE SIGNAL AND A CHROMINANCE SIGNAL FROM A RECEIVED COMPOSITE COLOR-TELEVISION SIGNAL AND FOR SUPPLYING SAID SIGNALS TO SAID IMAGE REPRODUCING DEVICE;

    MEANS FOR DETECTING CHANGES IN THE ABIENT LIGHT FALLING ON SAID IMAGE REPRODUCING DEVICE;

    AND MEANS RESPONSIVE TO SAID DETECTION MEANS FOR CHANGING A COLOR CHARACTERISTIC OF THE REPRODUCED IMAGE IN ACCORDANCE WITH THE CHANGES IN THE AMBIENT LIGHT TO COMPENSATE FOR SUCH CHANGES.

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