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Temperature based white point control in backlights

  • US 8,575,865 B2
  • Filed: 03/24/2009
  • Issued: 11/05/2013
  • Est. Priority Date: 03/24/2009
  • Status: Active Grant
First Claim
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1. A display, comprising:

  • a plurality of white light emitting diodes arranged within an electronics region and other regions of a backlight to produce an emitted white point that corresponds to a target white point, wherein the electronics region is configured to produce more heat during operation of the display than the other regions;

    a plurality of color compensating light emitting diodes arranged only within the electronics region of the backlight and intermixed with the plurality of white light emitting diodes;

    one or more drivers configured to drive groups of one or more color compensating light emitting diodes of the plurality of color compensating light emitting diodes at a respective driving strength; and

    a controller configured to detect a temperature change within the electronics region and to adjust at least one of the respective driving strengths to compensate for a shift in the emitted white point of white light emitting diodes arranged within the electronics region due to the temperature change.

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