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Method for producing a color image and imaging device employing same

  • US 9,997,135 B2
  • Filed: 12/19/2016
  • Issued: 06/12/2018
  • Est. Priority Date: 09/01/2009
  • Status: Active Grant
First Claim
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1. A method of producing a color image using a display device comprised of display pixels comprising groups of red, green and blue primary color subpixels, the method comprising:

  • a) providing data of an input image comprised of image pixels comprising red, green, and blue primary colors, to at least one of a computer readable storage medium, memory, or central processing unit of an imaging color rendering controller in communication with the display device;

    b) within at least one of an external processor, or the computer readable storage medium, memory, or central processing unit of the image color rendering controller, generating a first three-dimensional look-up table of addresses containing values of input colors and corresponding output colors, wherein the input colors are defined by tristimulus values of the red, green, and blue primary colors, and wherein for each input color tristimulus value, a corresponding output color is defined;

    c) via the central processing unit, loading the first three-dimensional look-up table into the image color rendering controller;

    d) in the central processing unit, executing an image processing algorithm to;

    increase the brightness of the image relative to a base brightness level by changing display device primary colors;

    decrease power to the display device below a base power level to reduce the brightness of the image; and

    restore color to the image to approximately the base brightness level by modifying image pixel data using the three-dimensional lookup table to produce output image pixel data; and

    e) outputting the output image pixel data to the display pixels of the display device to produce the color image having a brightness at least as high as the base brightness level while operating the display device at a power level lower than the base power level.

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