Apparatus for converting a digital signal to an analog signal for a pixel in a liquid crystal display and method therefor
AssigneeChi Mei Optoelectronics Corp.
InventorsLi-Yi Chen, Chen-Lung Kuo
Life of this patent
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Abstract
An apparatus for converting a digital pixel signal to a gamma voltage signal for a pixel in a liquid crystal display (LCD), wherein the digital pixel signal corresponds to the pixel. The apparatus includes a pixel signal converting unit for converting the digital pixel signal to a converted pixel signal and a gamma correction unit coupled to the pixel signal converting unit for outputting the gamma voltage signal according to the converted pixel signal. The relation between the digital pixel signal and the converted pixel signal is determined according to a display color of the pixel.
Claims33
An apparatus for converting a digital pixel signal to a gamma voltage signal for enabling a pixel in a liquid crystal display (LCD), wherein the digital pixel signal corresponds to the pixel, the apparatus comprising:
- a pixel signal converting unit for converting the digital pixel signal to a converted pixel signal, wherein the relation between the digital pixel signal and the converted pixel signal is determined according to a display, color of the pixel;
- and
- a gamma correction unit coupled to the pixel signal converting unit for converting the converted pixel signal into the gamma voltage signal and outputting the gamma voltage signal.
A method for converting a digital pixel signal to a gamma voltage signal, wherein the digital pixel signal corresponds to a pixel in a display panel, the method comprising the steps of:
- a. receiving the digital pixel signal;
- b. converting the digital pixel signal to a converted pixel signal, wherein the relation between the digital pixel signal and the converted pixel signal is determined according to a display color of the pixel;
- c. converting the converted pixel signal to the gamma voltage signal by performing gamma correction;
- and
- d. outputting the gamma voltage signal.
A method for converting a digital pixel signal to a gamma voltage signal for a pixel in a display panel, wherein the gamma voltage signal is used for applying to a pixel after a last gamma voltage signal is applied to the pixel, and the last gamma voltage signal corresponds to a last digital pixel signal, the method comprising:
- receiving the digital pixel signal;
- converting the digital pixel signal to the converted pixel signal equal to a dynamic converted pixel signal if the digital pixel signal and the last digital pixel signal are different in value, wherein the relation between the digital pixel signal and the dynamic converted pixel signal is determined according to a display color of the pixel, the digital pixel signal, and the last digital pixel signal;
- converting the digital pixel signal to the converted pixel signal equal to a static converted pixel signal according to the value of the digital pixel signal if the digital pixel signal and the last digital pixel signal are equal in value, wherein the relation between the digital pixel signal and the static converted pixel signal is determined according to the display color of the pixel;
- converting the converted pixel signal to the gamma voltage signal;
- and
- outputting the gamma voltage signal.
Dependencies are inferred from the claim text.