×

Display defect compensation with localized backlighting

  • US 10,726,801 B2
  • Filed: 04/17/2015
  • Issued: 07/28/2020
  • Est. Priority Date: 04/17/2015
  • Status: Active Grant
First Claim
Patent Images

1. An electronic device comprising:

  • a backlight unit configured to provide illumination across a viewable display area of the electronic device, the viewable display area comprising a plurality of zones, the plurality of zones being arranged in a regular zone arrangement;

    a liquid crystal layer disposed proximate to the backlight unit, the liquid crystal layer configured to selectively filter the illumination provided by the backlight unit; and

    a processor coupled to the backlight unit and to the liquid crystal layer, the processor configured to determine, based on local frame data indicative of content to be displayed, a local backlight brightness level of each zone of the plurality of zones and to generate liquid crystal control signaling for the liquid crystal layer,wherein the processor is further configured to adjust with a first adjustment, based on data indicative of content to be displayed, a respective backlight brightness level of each zone of the plurality of zones and to generate control signaling for the liquid crystal panel;

    wherein the processor is further configured, in addition to the first adjustment, to adjust with a second adjustment the respective backlight brightness levels and the liquid crystal control signaling to compensate for distortions arising from defects in the backlight unit and the liquid crystal layer, the defects otherwise resulting in a dimmer region of the viewable display area and a non-uniformity of display intensity.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×