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US 10,503,010 B2Granted
Thin direct-view LED backlights
AssigneesSeoul Semiconductor Co., Ltd., InteLED Corp.
InventorDavid Pelka
Life of this patent
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Abstract
A light-emitting apparatus including a light-emitting element and a lens covering the light-emitting element. The lens includes an upper surface having a convex shape and a lower surface including a cavity to which light emitted from the light-emitting elements is incident, in which the cavity includes an apex facing an upper surface of the light-emitting element and configured to reduce Fresnel reflections emitted vertically.
Claims14
A light-emitting apparatus comprising:
- a light-emitting element;
- a lens covering the light-emitting element, the lens comprising:
- an upper surface having a convex shape;
- and
- a lower surface comprising a cavity to which light emitted from the light-emitting elements is incident;
- and
- a unit cell comprising a film stack, the film stack comprising:
- a diffuser;
- and
- at least one brightness enhancement film (BEF) disposed on the diffuser;
- and
- an absorption film,
- wherein the cavity comprises an apex facing an upper surface of the light-emitting element and configured to reduce Fresnel reflections emitted vertically,
- wherein the light-emitting element is disposed in a hole formed at the central portion of a bottom floor of the unit cell, and
- wherein opposing surfaces of the absorption film each comprises an anti-reflective coating.
12 more elements
A light-emitting apparatus comprising:
- a light-emitting element;
- and
- a lens covering the light-emitting element, the lens comprising:
- an upper surface having a convex shape;
- and
- a lower surface comprising a cavity to which light emitted from the light-emitting elements is incident;
- and
- a unit cell comprising a film stack, the film stack comprising:
- a diffuser;
- and
- at least one brightness enhancement film (BEF) disposed on the diffuser;
- and
- an absorption film,
- wherein the cavity comprises an apex facing an upper surface of the light-emitting element and configured to reduce Fresnel reflections emitted vertically,
- wherein the light-emitting element is disposed in a hole formed at the central portion of a bottom floor of the unit cell,
- wherein the absorption film is disposed on a top surface of the film stack, and
- wherein a portion of the absorption film overlapping the light-emitting element has the lowest transmissivity.
14 more elements
Dependencies are inferred from the claim text.