Method and display device for sub -pixel rendering
AssigneeHimax Technologies Limited
InventorChi-Feng Chuang
Life of this patent
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Abstract
The sub-pixel rendering method includes: obtaining a digital image, in which the digital image includes multiple pixels, each of the pixels includes multiple grey levels, and the number of the grey levels in the digital image is greater than the number of the sub-pixel structures; performing a gamma transformation on each of the grey levels to obtain multiple sub-pixel luminances; performing a sub-pixel rendering algorithm on the sub-pixel luminances to obtain multiple rendered sub-pixel luminances; and transforming the rendered sub-pixel luminances into multiple rendered grey levels, and driving the display panel according to the rendered grey levels, in which the number of the rendered grey levels is equal to the number of the sub-pixel structures.
Claims10
A display device, comprising:
- a display panel comprising a plurality of sub-pixel structures;
- and
- a computation circuit configured to obtain a digital image comprising a plurality of pixels, wherein each of the pixels comprises a plurality of grey levels, each of the grey levels corresponds to one of a plurality of colors, each of the sub-pixel structures corresponds to one of the colors, the colors comprises red, blue, and green, and a number of the grey levels in the digital image is greater than a number of the sub-pixel structures,
- wherein for each of the colors, the computation circuit is configured to obtain a color ratio of the number of the corresponding sub-pixel structures to a number of the pixels, and
- wherein the computation circuit is configured to perform a gamma transformation on each of the grey levels to obtain a plurality of sub-pixel luminances, perform a sub-pixel rendering algorithm on the sub-pixel luminances to obtain a plurality of rendered sub-pixel luminances, transform the rendered sub-pixel luminances into a plurality of rendered grey levels, and drive the display panel according to the rendered grey levels, wherein a number of the rendered grey levels is equal to the number of the sub-pixel structures.
A sub-pixel rendering method for a display panel, wherein the display panel comprises a plurality of sub-pixel structures, the sub-pixel rendering method comprising:
- obtaining a digital image, wherein the digital image comprises a plurality of pixels, each of the pixels comprises a plurality of grey levels, each of the grey levels corresponds to one of a plurality of colors, each of the sub-pixel structures corresponds to one of the colors, the colors comprises red, blue, and green, and a number of the grey levels in the digital image is greater than a number of the sub-pixel structures;
- for each of the colors, obtaining a color ratio of the number of the corresponding sub-pixel structures to a number of the pixels;
- performing a gamma transformation on each of the grey levels to obtain a plurality of sub-pixel luminances;
- performing a sub-pixel rendering algorithm on the sub-pixel luminances to obtain a plurality of rendered sub-pixel luminances;
- and
- transforming the rendered sub-pixel luminances into a plurality of rendered grey levels, and driving the display panel according to the rendered grey levels, wherein a number of the rendered grey levels is equal to the number of the sub-pixel structures.
Dependencies are inferred from the claim text.