Patent ID: 8890899

Claim:
A monochrome light emitting display device comprising: a display panel having unit pixels of first and second sub-pixels arranged in a matrix arrangement to display a monochrome image; gate and data drivers respectively driving gate lines and data lines of the display panel; and a timing controller that aligns externally input RGB data to be suitable for driving of the display panel to supply the RGB data to the data driver and generates data and gate control signals to control the data and gate drivers, wherein each of the first and second sub-pixels includes at least one switching device and at least one light emitting cell, wherein the light emitting cell includes a first electrode and an organic light emitting layer formed a surface of the first electrode and a second electrode formed a surface of the organic emitting layer, wherein the organic light emitting layer formed in the first sub-pixel having a thickness same from that of the organic light emitting layer formed in the second sub-pixel, wherein the first electrode of the light emitting cell formed in the first sub-pixel having a thickness different from that of the first electrode of the light emitting cell formed in the second sub-pixel, and wherein the unit pixels have the same size and the first sub-pixel and the second sub-pixel in each unit pixel have different size.