(a) Field of the Invention
The invention relates to a driving device and a display device including the same, and more particularly, to a driving device capable of controlling gamma independently for each of red (R), green (G), or blue (B) colors and a display device including the same.
(b) Description of the Related Art
A general display device includes a display panel assembly which includes a plurality of pixels including a switching element and display signal lines, a gray voltage generator generating reference gray voltage, and a data driver which generates a plurality of gray voltages using the reference gray voltage and applies gray voltage corresponding to an image signal among the generated gray voltage to a data line among the display signal lines as a data signal.
A general gray voltage generator generates a defined number of the reference gray voltages according to a gamma curve of a liquid crystal display. The reference gray voltages include a set having a positive value for a common voltage Vcom and a set having a negative value for the common voltage Vcom. The data driver divides the reference gray voltages to generate gray voltages for an entire gray and may select the data signal among the gray voltages.
In order to implement a color display, each pixel of the display device uniquely displays one of primary colors such as R, G, and B or alternately displays the primary colors with time. Since the pixel displaying each of R, G, and B has a different gamma characteristic, when the same reference gray voltage is used based on the same gamma curve, color sense for each gray may not be uniform or a desired color may not be represented.
The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.