Patent ID: 9199842
Filing Date: 2015-12-01
Classification: B32B,B82Y,F21V,F21Y,G02B,G02F,Y10S,Y10T

Abstract:
1. A display backlighting unit (BLU), comprising: at least one primary light source that emits primary light; a light guide panel (LGP) optically coupled to the at least one primary light source, whereby the primary light is transmitted uniformly through the LGP; a remote phosphor film disposed over the LGP, wherein the primary light transmits uniformly through the LGP and into the remote phosphor film; and a first barrier film and a second barrier film, wherein the first and second barrier films are each disposed adjacent the remote phosphor film and on opposite sides thereof, and wherein the remote phosphor film is not directly physically coupled to the LGP and comprises only two populations of light emitting quantum dots (ODs) including a first population of QDs configured to emit first secondary light and a second population of QDs configured to emit second secondary light at a different wavelength than the first secondary light, whereby at least a portion of the primary light is absorbed by the two populations of QDs and reemitted by the QDs as the first and second secondary light.