Optical film and back light module
AssigneeWintek Corporation
InventorsZhi-Ting Ye, Chun-Chih Huang
Life of this patent
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Abstract
An optical film includes a body and a plurality of first linear protrusions. The body has a first surface and a second surface opposite to the first surface. The first linear protrusions are disposed on the first surface, and each first linear protrusion is extended along a first direction and has a first curvy ridge line departing from the first surface, wherein the first curvy ridge lines are concave towards a fixed direction. When the first curvy ridge line is located on a suppositional plan, the suppositional plan is not parallel to the first surface. The above-mentioned optical film is not easy to be worn.
Claims18
An optical film, comprising:
- a body, having a first surface and a second surface opposite thereto;
- and
- a plurality of first linear protrusions, disposed on the first surface, wherein each of the first linear protrusions is extended along a first direction and has a first curvy ridge line which is curved inward into the first surface, and when the first curvy ridge line is located on a first suppositional plan, the first suppositional plan is not parallel to the first surface.
A backlight module, comprising:
- a set of light sources;
- a light guide plate, having a light incidence surface and a light-emitting surface connecting the light incidence surface, wherein the set of light sources is located beside the light incidence surface;
- an optical film, disposed on the light-emitting surface and comprising:
- a body, having a first surface and a second surface opposite thereto;
- and
- a plurality of first linear protrusions, disposed on the first surface, wherein each of the first linear protrusions is extended along a first direction and has a first curvy ridge line which is curved inward into the first surface, and when the first curvy ridge line is located on a first suppositional plan, the first suppositional plan is not parallel to the first surface;
- and
- a reflective plate, disposed under the light guide plate, wherein the light guide plate is located between the reflective plate and the optical film.
Dependencies are inferred from the claim text.