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Locally dimmed quantum dot display

  • US 10,373,574 B2
  • Filed: 02/26/2018
  • Issued: 08/06/2019
  • Est. Priority Date: 02/24/2009
  • Status: Active Grant
First Claim
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1. A display comprising:

  • a backlight, the backlight comprising a controller and a set of emitters, which is controllable to emit a first spatially varying light pattern, the first spatially varying light pattern produced by modulating the illumination of the set of emitters according to input image data corresponding to an image to be displayed by the display;

    a phosphorescent plate located to be illuminated by the first spatially varying light pattern and comprising one or more materials which emit a second spatially varying light pattern in response to receiving the first spatially varying light pattern, the second spatially varying light pattern having a spectral distribution different from that of the first spatially varying light pattern, the second varying light pattern based upon determining the expected light output of the phosphorescent plate when illuminated by the modulated light from the set of emitters to produce the first varying light pattern; and

    a display modulation layer located to receive the second spatially varying light pattern, the display modulation layer controllable to spatially modulate the second spatially varying light pattern and to thereby provide a third spatially varying light pattern, the third spatially varying light pattern having a spatial variation different from that of the second spatially varying light patterns;

    wherein the phosphorescent plate comprises a patterned plurality of regions, each region comprising a plurality of sub-regions each configured to emit light having a unique spectral distribution relative to the other sub-regions within the same region in response to receiving light from the modulated light source;

    wherein the plurality of sub-regions within each region comprise a first sub-region which emits light having a first central wavelength, a second sub-region which emits light having a second central wavelength and a third sub-region which emits light having a third central wavelength; and

    further wherein the sub-regions are configured to illuminate an area of the display modulator layer and further wherein the display modulator layer comprises a set of color filtered subpixels to provide a wide color gamut.

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