Quantum Dot Films, Lighting Devices, and Lighting Methods

摘要

Light-emitting quantum dot films, quantum dot lighting devices, and quantum dot-based backlight units are provided. Related compositions, components, and methods are also described. Improved quantum dot encapsulation and matrix materials are provided. Quantum dot films with protective barriers are described. High-efficiency, high brightness, and high-color purity quantum dot-based lighting devices are also included, as well as methods for improving efficiency and optical characteristics in quantum dot-based lighting devices.

主权项

1. A display backlighting unit (BLU), comprising:
(a) at least one primary light source that emits primary light; (b) a light guide panel (LGP) optically coupled to the at least one primary light source, whereby the primary light is transmitted through the LGP; (c) a remote phosphor film comprising at least two populations of light emitting quantum dots (QDs), wherein the remote phosphor film is disposed over the LGP, wherein the primary light transmits through the LGP and into the remote phosphor film; (d) 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; (e) a first reflector film disposed beneath the LGP, wherein the reflector film reflects primary light toward the QDs in the remote phosphor film; and (f) a second reflector film disposed on top of the remote phosphor film, wherein the second reflector film reflects and recycles a portion of the primary light; wherein an optical density of the QDs in the remote phosphor film is less than an optical density of the QDs in a remote phosphor film of a BLU that does not include a second reflector film.