Patent ID: 8058783
Filing Date: 2011-11-15
Classification: H01L,Y02E

Abstract:
1. An organic light emitting diode (OLED) display device, comprising: a first substrate; an organic light emitting element formed over the first substrate, wherein the organic light emitting element comprise i) first and second electrodes and ii) an organic emission layer interposed between the first and second electrodes; a driving circuit formed over the substrate and configured to drive the organic light emitting element; a cholesteric liquid crystal (CLC) layer formed over the organic light emitting element and configured to selectively transmit or reflect circularly polarized light; a translucent metal layer formed on the CLC layer and configured to partially transmit and partially reflect incoming light; a retardation plate formed on the translucent metal layer and configured to input one of i) linearly polarized light and ii) circularly polarized light, and output the other light; and a polarizing plate formed on the retardation plate and configured to transmit a portion of incoming light that matches a polarizing axis of the polarizing plate, and absorb the remaining incoming light that does not match the polarizing axis thereof.