Device and method for subpixel rendering

A display device, comprising:

• a display panel;
• and
• a display driver configured to output an output image generated through subpixel rendering (SPR) on the display panel, wherein the display driver comprises:
• buffer memory circuitry configured to store first subpixel data for a plurality of first subpixels of input subpixels of an input image, wherein the plurality of the first subpixels each are encompassed at least partially in a plurality of predetermined regions defined within two lines of input subpixels of the input image;
• a register configured to store coefficients that respectively correspond to shapes of portions of the first subpixels encompassed in the predetermined regions, wherein for each of the predetermined regions, a first total of the coefficients of a first set of the portions of the first subpixels equals a second total of the coefficients of a second set of the portions of the first subpixels, wherein an adjacent two portions of the first set are diagonally arranged, and wherein an adjacent two portions of the second set are diagonally arranged;
• and
• SPR circuitry configured to calculate second subpixel data of second subpixels of an output image, based on the first subpixel data and the coefficients.

A method for subpixel rendering, comprising:

• receiving input image data comprising input subpixels;
• storing first subpixel data for a plurality of first subpixels of the input subpixels, wherein each of the plurality of first subpixels is encompassed at least partially in a plurality of predetermined regions defined within two adjacent lines of the input subpixels;
• storing coefficients corresponding to shapes of portions of the plurality of first subpixels that are encompassed in the plurality of predetermined regions, wherein for each of the predetermined regions, a first total of the coefficients of a first set of the portions of the first subpixels equals a second total of the coefficients of a second set of the portions of the first subpixels, wherein an adjacent two portions of the first set are diagonally arranged, and wherein an adjacent two portions of the second set are diagonally arranged;
• and
• generating, based on the first subpixel data and the coefficients, output image data comprising second subpixel data for second subpixels.