Patent ID: 8847997

Claim:
An organic light emitting display, comprising: a plurality of pixels, each pixel including a transparent transistor; a timing controller configured to receive an externally supplied first data to generate a second data from the first data; a frame memory configured to store one frame of the first data: a grey level judging unit configured to supply a control signal to the timing controller corresponding to grey level values of the first data stored in the frame memory; and a data driver configured to receive the second data, to generate a data signal from the second data, and to supply the data signal to data lines coupled to the pixels, wherein the first data comprises of i bits (i is an integer) that includes a most significant bit and a least significant bit, wherein the second data comprises of j bits (j is an integer greater than i) that includes a most significant bit and a least significant bit, wherein the grey level judging unit generates the control signal to control fixing of the most significant bit of the first data to a first value when the i bits of the first data stored in the frame memory represent a high difference in the grey level values, and causes to fix the most significant bit of the i bits of the second data to the first value, and wherein the grey level judging unit generates the control signal to control the fixing of the least significant bit of the first data to a second value when i bits of the first data stored in the frame memory represent a low difference in the grey level values, and causes to fix the least significant bit of the i bits of the second data to the second value.