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Voltage-balanced serial iLED pixel and display

  • US 10,453,826 B2
  • Filed: 05/31/2017
  • Issued: 10/22/2019
  • Est. Priority Date: 06/03/2016
  • Status: Active Grant
First Claim
Patent Images

1. A multi-color inorganic light-emitting diode (iLED) pixel, comprising:

  • a common voltage signal and a common ground signal;

    a first color sub-pixel comprising two or more first iLEDs, each first iLED emitting a first color of light when provided with electrical power at a first voltage, the two or more first iLEDs serially connected between the common voltage signal and the common ground signal;

    a second color sub-pixel comprising one or more second iLEDs, each second iLED emitting a second color of light different from the first color when provided with electrical power at a second voltage different from the first voltage, the one or more second iLEDs serially connected between the common voltage signal and the common ground signal;

    a third color sub-pixel comprising one or more third iLEDs each emitting a third color of light different from the first and second colors of light when provided with electrical power at a third voltage different from the first or second voltage, the one or more third iLEDs serially connected between the common voltage signal and the common ground signal; and

    a pixel controller that provides a first control signal for controlling the one or more first iLEDs to emit light and a second control signal for controlling the one or more second iLEDs to emit light,wherein the number of first iLEDs is different from the number of second iLEDs and the number of second iLEDs is the same as the number of third iLEDs,wherein a ratio of a controlling attribute of the first control signal to a controlling attribute of the second control signal is dependent on a ratio of the number of first iLEDs to the number of second iLEDs, andwherein at least one iLED of the first color sub-pixel, the second color sub-pixel, or the third color sub-pixel has a width from 2 to 5 μ

    m, 5 to 10 μ

    m, 10 to 20 μ

    m, or 20 to 50 μ

    m, has a length from 2 to 5 μ

    m, 5 to 10 μ

    m, 10 to 20 μ

    m, or 20 to 50 μ

    m, or has a height from 2 to 5 μ

    m, 4 to 10 μ

    m, 10 to 20 μ

    m, or 20 to 50 μ

    m.

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