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US 9,958,132 B2Granted
Optical element and light emitting device including the same
AssigneeLG Innotek Co., Ltd.
InventorsLee Im Kang, Chang Hyuck Lee
Life of this patent
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Abstract
An optical element includes a lens includes a surface of incidence on which light is incident from a light source, a first optical surface recessed toward the light source, and a second optical surface extending from the first optical surface, and a cover arranged on the lens to cover at least a part of the first optical surface.
Claims11
An optical element comprising;
- a lens including a surface of incidence on which light is incident from a light source, a first optical surface recessed toward the light source, and a second optical surface extending from the first optical surface;
- and
- a cover arranged on the lens to cover at least a part of the first optical surface,
- wherein a surface area of the cover is the same as or smaller than a cross-sectional area of the lens cut parallel to the cover,
- wherein the cover includes a plurality of through-holes which are uniformly distributed,
- wherein one of the plurality of through-holes is located on a center of the cover, and others of the plurality of through-holes are located on a plurality of concentric circles centering on a center of the cover,
- wherein the surface of incidence includes at least one convex portion formed to protrude toward a lower portion of the lens,
- wherein a bottom of the at least one convex portion is located below a lowermost portion of the second optical surface with respect to a position of the optical axis, and
- wherein an illumination distribution is controlled by adjusting a percent of light transmittance and a percent of light reflectance of the cover.
6 more elements
A light emitting device comprising:
- a driving substrate;
- a plurality of light emitting elements arranged on the driving substrate;
- and
- a plurality of optical elements arranged on the plurality of light emitting elements to cover at least a part of each light emitting element,
- wherein the optical elements each include a lens including a surface of incidence on which light emitted from the light emitting element is incident, a first optical surface recessed toward the light emitting element, and a second optical surface extending from the first optical surface;
- and a cover arranged on the lens to cover at least a part of the first optical surface,
- wherein a surface area of the cover is the same as or smaller than a cross-sectional area of the lens cut parallel to the cover,
- wherein the cover includes a plurality of through-holes which are uniformly distributed,
- wherein one of the plurality of through-holes is located on a center of the cover, and others of the plurality of through-holes are located on a plurality of concentric circles centering on a center of the cover,
- wherein the surface of incidence includes at least one convex portion formed to protrude toward a lower portion of the lens,
- wherein a bottom of the convex portion is located below a lowermost portion of the second optical surface with respect to a position of the optical axis, and
- wherein an illumination distribution is controlled by adjusting a percent of light transmittance and a percent of light reflectance of the cover.
9 more elements
Dependencies are inferred from the claim text.