Patent ID: 7932533
Filing Date: 2011-04-26
Classification: H01L

Abstract:
1. A pixel structure on a substrate, comprising: a control unit arranged on the substrate; an OEL unit arranged on the substrate, the OEL unit comprising a transparent electrode, a light-emitting layer and a metal electrode, wherein the transparent electrode is electrically connected with the control unit, and the light-emitting layer and the metal electrode are sequentially stacked on the transparent electrode; and a semi-transparent reflector structure sandwiched between the substrate and the OEL unit, the semi-transparent reflector structure at least comprising a plurality of first and second dielectric layers, a third dielectric layer, and a fourth dielectric layer over the control unit, the first and second dielectric layers being alternately stacked, the refractive index of the first dielectric layers being different from that of the second dielectric layers, the third dielectric layer extending below the bottom of the first and second dielectric layers to the control unit, and the fourth dielectric layer being extended between the bottom of the first and second dielectric layers and the third dielectric layer, wherein the total thickness of the first and second dielectric layers is larger than that of the third and fourth dielectric layers.