Patent ID: 9046245
Filing Date: 2015-06-02
Classification: F21V,F21Y,G02F,H01L,H05B

Abstract:
1. A lighting device comprising: a substrate comprising a light-transmitting material; a second electrode comprising a light-transmitting material; an EL layer; a first electrode comprising a reflective material; a pair of polarization beam splitters; and a quarter-wave plate selectively provided between the substrate and only one of the pair of polarization beam splitters, wherein the second electrode, the EL layer, and the first electrode are sequentially stacked over a first side of the substrate, wherein the pair of polarization beam splitters is provided over a second side of the substrate opposite to the first side, wherein the pair of polarization beam splitters is configured to transmit light of a first polarization component from the EL layer while reflecting light of a second polarization component from the EL layer, the second polarization component being different from the first polarization component.