LIGHT GUIDE MODULE AND TOUCH PANEL
A light guide module is provided. The light guide module includes a light guide strip, a light transmitting plate, and a microstructure unit. The light guide strip includes a light incident surface, a first lateral surface, and an intense region, wherein the first lateral surface is adjacent to the light incident surface and the intense region is defined in a region of the light guide strip which is close to the light incident surface. The light transmitting plate faces the first lateral surface of the light guide strip. The microstructure unit is disposed at the light transmitting plate corresponding to the intense region.
1 . A light guide module, comprising:
a light guide strip, comprising a light incident surface, a first lateral surface, and an intense region, wherein the first lateral surface is adjacent to the light incident surface and the intense region is defined in a region of the light guide strip which is close to the light incident surface;
a light transmitting plate, facing the first lateral surface of the light guide strip; and
a microstructure unit, corresponding to the intense region, disposed at the light transmitting plate.
2 . The light guide module as claimed in claim 1 , wherein the intense region is defined in a region of the light guide strip, between the light incident surface and a predetermined position, wherein the distance from the predetermined position to the light incident surface is equal to 5-20 mm.
3 . The light guide module as claimed in claim 2 , wherein the distance from the predetermined position to the light incident surface is equal to 10 mm.
4 . The light guide module as claimed in claim 2 , further comprising a brightness enhancement film, wherein, the brightness enhancement film is disposed at a region beyond the intense region of the first lateral surface of the light guide strip.
5 . The light guide module as claimed in claim 1 , further comprising a square U-shape reflective layer, wherein the light guide strip further comprises a second lateral surface opposite to the first lateral surface, and the square U-shape reflective layer is disposed on the second lateral surface.
6 . The light guide module as claimed in claim 1 , wherein the light transmitting plate comprises a reflective index between 1.48 and 1.62.
7 . The light guide module as claimed in claim 1 , wherein the light transmitting plate is separated from the first lateral surface of the light guide strip by a distance of 0.01-0.56 mm.
8 . The light guide module as claimed in claim 1 , wherein the microstructure unit comprises a plurality of triangular pyramids, and the triangular pyramids are disposed at a surface of the light transmitting plate.
9 . The light guide module as claimed in claim 8 , wherein an angle, formed between the surface of the light transmitting plate and a connecting line that connects an apex of each base of the triangular pyramids to an apex of each top of the triangular pyramids, is equal to 5-26 degrees.
10 . The light guide module as claimed in claim 1 , wherein the microstructure unit comprises a plurality of quadrangular pyramids, and the quadrangular pyramids are disposed at a surface of the light transmitting plate.
11 . The light guide module as claimed in claim 1 , wherein the microstructure unit comprises a brightness enhancement film comprising a plurality of grooves formed side by side on a surface of the brightness enhancement film, wherein the grooves extend in a direction parallel to an extending direction of the light guide strip.
12 . The light guide module as claimed in claim 1 , wherein the microstructure unit comprises a brightness enhancement film comprising a plurality of grooves formed side by side on a surface of the brightness enhancement film, wherein the grooves extend in a direction perpendicular to an extending direction of the light guide strip.
13 . A touch panel, comprising:
a main body;
a plurality of light guide modules, disposed at lateral surfaces of the main
a light guide strip, comprising a light incident surface, a first lateral surface, and a intense region, wherein the first lateral surface is adjacent to the light incident surface and the intense region is defined in a region of the light guide strip which is adjacent to the light incident surface;
a light transmitting plate, facing the first lateral surface of the light guide strip; and
a microstructure unit, corresponding to the intense region, disposed at the light transmitting plate;
a plurality of light emitting elements, disposed correspondingly to the light guide modules respectively; and
a plurality of light receiving devices, disposed between each two neighboring light guide modules.
14 . The touch panel as claimed in claim 13 , wherein at least one of the light emitting elements is adjacent to the light incident surface of the light guide strip.
15 . The touch panel as claimed in claim 14 , wherein the microstructure unit comprises a concave and convex structure configured to change an incident angle of a light emitting from the light emitting elements.