Quantum dot films, lighting devices, and lighting methods
First Claim
Patent Images
1. A display backlighting unit (BLU), comprising:
- at least one primary light source which 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; and
a remote phosphor film comprising at least one population of light emitting quantum dots (QDs), wherein the remote phosphor film is disposed over the LGP, wherein the primary light transmits uniformly through the LGP and into the remote phosphor film, whereby at least a portion of the primary light is absorbed by the at least one population of QDs and reemitted by the QDs as secondary light having a longer wavelength than the primary light.
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Accused Products
Abstract
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.
420 Citations
164 Claims
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1. A display backlighting unit (BLU), comprising:
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at least one primary light source which 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; and a remote phosphor film comprising at least one population of light emitting quantum dots (QDs), wherein the remote phosphor film is disposed over the LGP, wherein the primary light transmits uniformly through the LGP and into the remote phosphor film, whereby at least a portion of the primary light is absorbed by the at least one population of QDs and reemitted by the QDs as secondary light having a longer wavelength than the primary light.
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2-31. -31. (canceled)
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32. A display backlighting unit (BLU), comprising:
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at least one primary light source which 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; and a remote phosphor film comprising at least one population of light emitting quantum dots (QDs) and one or more primary light scattering features which scatter primary light toward the QDs; wherein the remote phosphor film is disposed over the LGP, wherein the primary light transmits uniformly through the LGP and into the remote phosphor film, whereby at least a portion of the primary light is absorbed by the at least one population of QDs and reemitted by the QDs as secondary light having a longer wavelength than the primary light. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 123, 124, 125, 126, 127, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 143, 144, 145, 161, 163)
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92-101. -101. (canceled)
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102. A quantum dot (QD) phosphor film, comprising:
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a QD phosphor material comprising at least one population of QDs embedded in at least one matrix material, wherein the QDs emit secondary light upon absorbance of primary light; and at least one bottom barrier film disposed on a first surface of the QD phosphor material; and at least one top barrier film disposed on a second surface of the QD phosphor material, wherein the second surface is opposite the first surface; wherein the QD phosphor material is disposed between the at least one top barrier film and the at least one bottom barrier film. - View Dependent Claims (157)
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103-122. -122. (canceled)
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128-129. -129. (canceled)
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140-142. -142. (canceled)
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146-156. -156. (canceled)
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158-160. -160. (canceled)
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162. (canceled)
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164-167. -167. (canceled)
Specification