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US 7,841,749 B2Granted
Optical member, backlight assembly having the same and liquid crystal display device having the same
AssigneeSamsung Electronics Co., Ltd.
InventorsJin-Soo Kim, Jung-Wook Paek, Byung-Yun Joo, Ju-Hwa Ha, Jin-Sung Choi
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Abstract
A backlight assembly includes a light source and an optical member disposed over the light source and including a surface that has a plurality of lens-shaped portions and at least one prism-shaped portion.
Claims23
An optical member comprising a surface including
- a first group including a plurality of consecutively disposed lens-shaped portions, the lens-shaped portions diffusing light incident to the optical member directly from a light source, the diffused light of the lens-shaped portions traveling through the lens-shaped portions and away from the optical member, each lens-shaped portion comprising a column shape including a semi-circular curved upper surface;
- and
- a second group including at least one prism-shaped portion diffusing the light incident to the optical member directly from the light source, the diffused light of the prism-shaped portion traveling through the prism-shaped portion and away from the optical member,
- wherein the first group and the second group are alternately disposed on the surface, and
- wherein a number ratio of the prism-shaped portion and the lens-shaped portions is 1:2, and the prism-shaped portion and the lens-shaped portions have a substantially same height.
2 more elements
A backlight assembly comprising:
- a light source;
- and
- an optical member disposed over the light source and comprising a first surface including:
- a plurality of lens-shaped portions disposed directly adjacent to each other, each of the lens-shaped portions comprising a column shape including a semi-circular curved upper surface and diffusing a first portion of light incident to the optical member from the light source, the diffused light of the lens-shaped portions traveling through the lens-shaped portions and away from the backlight assembly;
- and
- at least one prism-shaped portion diffusing a second portion of the light incident to the optical member from the light source, the diffused light of the prism-shaped portion traveling through the prism-shaped portion and away from the backlight assembly,
- wherein the plurality of directly adjacent lens-shaped portions and the at least one prism-shaped portion are alternately arranged on the first surface, and
- wherein a number ratio of the prism-shaped portion and the lens-shaped portions is 1:2, and the prism-shaped portion and the lens-shaped portions have a substantially same height.
5 more elements
A liquid crystal display (LCD) device comprising:
- a backlight assembly comprising a flat-type fluorescent lamp and an optical member disposed over the flat-type fluorescent lamp, the optical member comprising:
- a surface having a plurality of consecutively disposed lens-shaped portions on the surface and diffusing light incident to the optical member from the flat-type fluorescent lamp, the diffused light of the lens-shaped portions traveling through the lens-shaped portions and away from the backlight assembly, each of the lens-shaped portions comprising a column shape including a semi-circular curved upper surface, and
- at least one prism-shaped portion diffusing the light incident to the optical member from the flat-type fluorescent lamp, the diffused light of the prism-shaped portion traveling through the prism-shaped portion and away from the backlight assembly, the consecutive lens-shaped portions disposed between adjacent prism-shaped portions,
- wherein a number ratio of the prism-shaped portion and the lens-shaped portions is 1:2, and the prism-shaped portion and the lens-shaped portions have a substantially same height;
- and
- a display unit configured to display images using light provided from the backlight assembly.
3 more elements
A method of forming an optical member, the method comprising:
- disposing an ultraviolet-curable resin on a surface of a base, the base comprising profiles corresponding to a plurality of lens-shaped portions and a prism-shaped portion of the optical member,
- disposing a base plate on the resin,
- processing the resin and the base plate to form the optical member comprising the plurality of lens-shaped portions and the prism-shaped portion, the processing comprising irradiating ultraviolet light onto the base plate,
- wherein the profiles comprise:
- a first profile including a plurality of consecutively disposed lens-shaped portions diffusing light incident to the optical member from a light source, the diffused light of the lens-shaped portions traveling through the lens-shaped portions and away from the optical member, each of the lens-shaped portions comprising a column shape including a semi-circular curved upper surface, and
- a second profile including the prism-shaped portion diffusing the light incident to the optical member from the light source, the diffused light of the prism-shaped portion traveling through the prism-shaped portion and away from the optical member, the first and second profiles disposed alternating with each other across the surface of the base,
- wherein a number ratio of the prism-shaped portion and the lens-shaped portions is 1:2, and the prism-shaped portion and the lens-shaped portions have a substantially same height.
4 more elements
Dependencies are inferred from the claim text.