Patent ID: 7872256

Claim:
An organic light emitting display, comprising: a substrate; a plurality of first electrodes arranged in a corresponding plurality of pixels, the plurality of pixels including red pixels, blue pixels and green pixels; a hole injection layer arranged on the first electrodes arranged on the substrate, the hole injection layer having different respective thicknesses in correspondence with the pixels; a hole transport layer entirely covering the hole injection layer; a white light emitting layer entirely covering the hole transport layer; an electron transport layer arranged on the white light emitting layer; a second electrode arranged on the electron transport layer; and a color filter arranged on the second electrode, wherein the hole injection layer includes: a first hole injection layer entirely covering a display region of the organic light emitting display that includes the first electrodes arranged on the substrate; and a patterned second hole injection layer arranged on the first hole injection layer and arranged separately over ones of the plurality of pixels, wherein the second hole injection layer is arranged only above ones of the first electrodes and not between ones of the first electrodes, and wherein the first hole injection layer is arranged both above ones of the first electrodes and on exposed portions of the substrate in between neighboring ones of the pixels.