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US 10,379,400 B2Granted
Optical member and backlight unit including same
AssigneeLG Innotek Co., Ltd.
InventorKyung Jin Kim
Life of this patent
Estimating the term…
Abstract
Disclosed are an optical member and a backlight unit including the same, the optical member comprising: a lens including a first optical surface, a second optical surface facing the first optical surface, and a third optical surface interconnecting the first optical surface and second optical surface; and a cover which is disposed on the second optical surface and has a light transmittance of 5 to 30%.
Claims12
An optical member comprising:
- a lens including a first optical surface, a second optical surface facing the first optical surface, and a third optical surface connecting the first optical surface and the second optical surface;
- and
- a cover disposed on the second optical surface and having light transmittance greater than 10% and less than 30%,
- wherein the second optical surface includes a central portion recessed toward the first optical surface, a flat edge portion connected to the third optical surface, and a curved portion that connects the central portion and the flat edge portion, wherein the flat edge portion of the second optical surface includes a flat surface having a width in a range of about 0.5 mm to 1 mm,
- wherein an edge portion of the cover is fixed to the flat surface of the second optical surface having the width in the range of about 0.5 mm to 1 mm, and a center portion of the cover is spaced from the central portion of the second optical surface, wherein the cover includes:
- a base substrate having a thickness in a range of 100 μm to 1000 μm;
- and
- an adhesive layer formed on a light incident surface of the base substrate.
5 more elements
A backlight unit comprising:
- a driving substrate;
- a plurality of light emitting devices disposed on the driving substrate;
- and
- a plurality of optical members which controls light emitted from the plurality of light emitting devices,
- wherein the optical member includes:
- a lens having a first optical surface on which light emitted from the light emitting device is incident, a second optical surface facing the first optical surface, and a third optical surface connecting the first optical surface and the second optical surface;
- and
- a cover disposed on the second optical surface and having light transmittance greater than 10% and less than 30%,
- wherein the second optical surface includes a central portion recessed toward the first optical surface, a flat edge portion connected to the third optical surface, and a curved portion that connects the central portion and the flat edge portion, wherein the flat edge portion of the second optical surface includes a flat surface having a width in a range of about 0.5 mm to 1 mm,
- wherein an edge portion of the cover is fixed to the flat surface of the second optical surface having the width in the range of about 0.5 mm to 1 mm, and a center portion of the cover is spaced from the central portion of the second optical surface, wherein the cover includes:
- a base substrate having a thickness in a range of 100 μm to 1000 μm;
- and
- an adhesive layer formed on a light incident surface of the base substrate.
10 more elements
Dependencies are inferred from the claim text.