Patent ID: 8736641
Filing Date: 2014-05-27
Classification: G09G

Abstract:
1. A driving apparatus of an organic light emitting display device, the driving apparatus comprising: a display panel comprising a plurality of unit pixels, which comprise a red sub-pixel, green sub-pixel, first blue sub-pixel, and second blue sub-pixel and which are arranged in a certain type of pixel arrangement structure in respective areas which are defined by a plurality of scan lines and data lines; a data converter generating four-color image data to be supplied to a unit pixel on the basis of the three-color input data having red, green, and blue; a timing controller aligning the four-color image data in correspondence with the pixel arrangement structure; and a panel driver supplying a data signal, corresponding to each of the four-color image data which are aligned and supplied by the timing controller, to a corresponding sub-pixel, wherein the data converter comprises: a gamma correction unit gamma-correcting the three-color input data; a color coordinate conversion unit converting color coordinates of the gamma-corrected three-color input data, based on blue data of the gamma-corrected three-color input data, to generate XYZ color coordinate data; a color gamut determination unit generating a first logic level of color gamut determination signal or a second logic level of color gamut determination signal, based on a CIE colorimetric system which comprises a first color gamut defined by red, green, and first blue, and a second color gamut defined by red, green, and second blue, wherein the color gamut determination unit generates the first logic level of color gamut determination signal when the XYZ color coordinate data are comprised in the first color gamut, or generates the second logic level of color gamut determination signal when the XYZ color coordinate data are comprised in the second color gamut; a color coordinate inverse conversion unit performing color coordinate inverse conversion on the XYZ color coordinate data to generate the three-color conversion data; and a four-color image data generation unit generating the four-color image data according to the first or second logic level of color gamut determination signal, on the basis of the three-color input data and the inversely gamma-corrected three-color conversion data.