DEVICE AND METHOD FOR COLOR REDUCTION WITH DITHERING

摘要

Techniques for displaying a quality-improved image with reduced power consumption are provided. In one embodiment, a display panel driver is provided that includes a dithering section configured to receive first m-bit image data and configured to generate second image data by performing dithering on the first image data with n-bit dither values each selected from elements of a dither table, and a driver circuit configured to drive the source lines of a display panel in response to the second image data. In generating the second image data corresponding to first pixels belonging to a first pixel column, the dither values are selected from elements in a first column of the dither table, while the second image data corresponding to second pixels belonging to a second pixel column adjacent to the first pixel column, the dither values are selected from elements in a second column of the dither table.

主权项

1. A display panel driver for driving a display panel which includes a plurality of source lines and a plurality of pixel columns each comprising a plurality of pixels arrayed in a first direction in which the source lines are extended, the pixels including subpixels respectively connected to associated one of the source lines, the driver comprising:
a dithering section configured to receive first m-bit image data and generate second image data by performing dithering on the first image data with n-bit dither values, wherein m is an integer of three or more and n is an integer from 2 to m; and a driver circuit configured to drive the plurality of source lines of the display panel in response to the second image data, wherein the dither values are each selected from elements of a dither table, each of the elements is an n-bit value, wherein, in generating the second image data corresponding to first pixels belonging to a first pixel column of the plurality of pixel columns, the dither values are selected from elements in a first column of the dither table in response to addresses of the first pixels, wherein, in generating the second image data corresponding to second pixels belonging to a second pixel column adjacent to the first pixel column in a second direction perpendicular to the first direction, the dither values are selected from elements in a second column of the dither table in response to addresses of the second pixels, wherein all the elements of the first column of the dither table belong to a half of the elements of the dither table having smaller values, and wherein all the elements of the second column of the dither table belong to the other half of the elements of the dither table having larger values.