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US 7,290,919 B2Granted
Backlight module and brightness enhancement film thereof
AssigneesAu Optronics Corporation, Sun Yat-senUniversity
InventorsCheng-tang Pan, Ching-hua Su, Han-chang Cheng, Chih-liang Pan
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Abstract
A backlight module includes a light source, a light guide plate for guiding light from the light source, and a brightness enhancement film having a plurality of spherical surface microlenses for gathering light from the light guide plate. In contrast to traditional prism sheets, the brightness enhancement film having the plurality of spherical surface microlenses have better efficiency of light-gathering.
Claims19
A backlight module, comprising:
- a light source;
- a light guide plate for guiding light from the light source;
- and
- a brightness enhancement film, having a plurality of spherical surface microlenses and a plurality of carriers formed thereon, disposed over the light guide plate, wherein each of the spherical surface microlenses is disposed on the corresponding one of the plurality of carriers, thereby increasing a height-wide ratio of the brightness enhancement film.
1 more element
A brightness enhancement film, comprising:
- a substrate;
- a plurality of first carriers disposed on the substrate;
- and
- a plurality of spherical surface microlenses, each being disposed on the corresponding one of the plurality of first carriers.
1 more element
A backlight module, comprising:
- a light source;
- a light guide plate for guiding light from the light source;
- and
- a brightness enhancement film, having a plurality of spherical surface microlenses and a plurality of carriers formed thereon, disposed over the light guide plate, wherein each of the plurality of carriers is closely disposed with each other, and each of the spherical surface microlenses is disposed on the corresponding one of the plurality of carriers.
1 more element
Dependencies are inferred from the claim text.