Patent ID: 8044903

Claim:
A display device, comprising: a data voltage generating circuit supplied with a data signal and operative to generate a data voltage, the data voltage generating circuit comprising: a gamma reference voltage generator operative to generate a first gamma reference voltage and a second gamma reference voltage by dividing a high source voltage and to generate a third gamma reference voltage and a fourth gamma reference voltage by dividing a low source voltage, wherein generating the first and second gamma reference voltages is irrelevant to the low source voltage, and generating the third and fourth gamma reference voltages is irrelevant to the high source voltage, wherein the gamma reference voltage generator comprises first and second gamma reference voltage dividers connected to the high source voltage in parallel and third and fourth reference voltage dividers connected to the low source voltage in parallel, and wherein the first to fourth gamma reference voltage dividers generate the first to fourth gamma reference voltages, respectively; and a gray level voltage generator, coupled with the gamma reference voltage generator, including a plurality of gray level voltage dividers operative to generate a plurality of gray level voltages wherein one of the plurality of gray level voltage dividers is exclusively selected and both end terminals of the selected one of the plurality of gray level voltage dividers are respectively supplied with the first and second gamma reference voltages or the third and fourth gamma reference voltages, wherein the generated data voltage is one of the selected gray level voltages corresponding to a gray level of the supplied data signal; and a display panel coupled with the data voltage generating circuit operative to display images using the generated data voltage.