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Method for fault-healing in a light emitting diode (LED) based display

  • US 9,536,463 B2
  • Filed: 08/08/2007
  • Issued: 01/03/2017
  • Est. Priority Date: 08/08/2007
  • Status: Active Grant
First Claim
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1. A method for fault-healing in a light emitting diode (LED) based display, comprising:

  • providing in each pixel of the display LEDs of four or more primary colors and diagnostic circuitry for electrically detecting fault in the LEDs of the pixel; and

    for each pixel,(a) receiving a signal specifying a light intensity and a color to be displayed by the pixel;

    (b) using the diagnostic circuitry of the pixel, detecting if a fault in the form of an open circuit exists in an LED of one of the primary colors;

    (c) when no fault is detected, driving the LEDs of the pixel with currents to achieve the specified light intensity and color; and

    (d) upon detecting the fault, driving the LEDs of the pixel in the primary colors without fault with currents to achieve the specified light intensity and color.

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