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US 8,911,160 B2Granted
Light emitting device package and backlight unit using the same
AssigneesLG Electronics Inc., LG Innotek Co., Ltd.
InventorsJung Hoon Seo, Jun Ho Jang
Life of this patent
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Abstract
An light emitting device package and a backlight unit using the same are disclosed, wherein light advancing upward from the light emitting device package can be refracted by a lens to enable the light having a uniform intensity to be emitted upwards to the advantage of efficiency and power consumption, even with a small number of light emitting devices.
Claims18
A light emitting device package, comprising:
- a substrate;
- a light emitting device on the substrate;
- and
- an optical lens over the light emitting device,
- wherein the optical lens includes:
- a top surface of the optical lens;
- a recessed surface centrally disposed on the top surface;
- a first bottom surface, wherein the first bottom surface is disposed below the recessed surface;
- a second bottom surface connected to the first bottom surface, wherein the first bottom surface is centrally disposed with respect to the second bottom surface;
- and
- a third bottom surface connected to the second bottom surface, wherein the third bottom surface is closer to the substrate than the first and second bottom surfaces,
- wherein the first, second and third bottom surfaces delimit a hollow portion into or under which the light emitting device is disposed,
- wherein the recessed surface converges towards a center of the recessed surface, and the first bottom surface converges towards a center of the first bottom surface,
- wherein the centers of the recessed surface and the first bottom surface substantially lie on a central axis of the light emitting device, and
- wherein at least one of the second and third bottom surfaces includes a curved or slanting shape.
12 more elements
Dependencies are inferred from the claim text.