LIQUID CRYSTAL DISPLAY, A LIGHT GUIDE FOR USE IN A LIQUID CRYSTAL DISPLAY AND A DEVICE COMPRISING SUCH A LIQUID CRYSTAL DISPLAY
The invention relates to liquid crystal display comprising image forming layers, at least one indirect light source and a light guide. The light guide comprises a first side facing the image forming layers, a second side opposite of the first side, and an in-coupling side facing the at least one indirect light source. The in-coupling side is a beveled in-coupling side.
1 . Liquid crystal display comprising
image forming layers;
at least one indirect light source, and
a light guide, wherein the light guide comprises a first side facing the image forming layers, a second side opposite of the first side, and an in-coupling side facing the at least one indirect light source, and the in-coupling side is a beveled in-coupling side.
2 . The Liquid crystal display as claimed in claim 1 , wherein the image forming layers comprise:
a LC-layer comprising an array of liquid crystal elements,
two polarizing layers,
two electrode layers, and
a color filter layer.
3 . The liquid crystal display as claimed in claim 1 , wherein the beveled in-coupling side is at an angle α with respect to second side, the angle α is within one of the following ranges: 1°<α<89° or 91°<α<179° or, 50<α<85° or 95°<α<175° or 30°<α<85° or 95°<α<150°.
4 . The liquid crystal display as claimed in claim 1 , wherein the image forming layers, the at least one indirect light source and the light guide are arranged to form an indirect back light liquid crystal display.
5 . The liquid crystal display as claimed in claim 4 , wherein the light guide comprises a reflective layer provided on the second side, the reflective layer facing the light guide.
6 . The liquid crystal display as claimed in claim 4 , wherein the light guide comprises a first side reflective layer provided on the first side, the first side reflective layer facing the light guide.
7 . The liquid crystal display as claimed in claim 6 , wherein the first side reflective layer is provided in a region between an edge of the light guide and a start of an out-coupling structure or the image forming layers.
8 . The liquid crystal display as claimed in claim 1 , wherein the image forming layers, the at least one indirect light source and the light guide are arranged to form an indirect front light liquid crystal display.
9 . The liquid crystal display as claimed in claim 8 , wherein the light guide comprises a reflective layer provided on the second side, the reflective layer facing the light guide.
10 . The liquid crystal display as claimed in claim 9 , wherein the reflective layer is provided in a region between an edge of the light guide and a start of an out-coupling structure or the image forming layers.
11 . The liquid crystal display as claimed in claim 8 , wherein the light guide comprises a first side reflective layer provided on the first side, the first side reflective layer facing the light guide.
12 . The liquid crystal display as claimed in claim 11 , wherein the first side reflective layer is provided in a region between an edge of the light guide and a start of an out-coupling structure or the image forming layers.
13 . The liquid crystal display as claimed in claim 1 , wherein the first side comprises an out-coupling structure comprising out-coupling features that are distributed in accordance with the beveled in-coupling side.
14 . A light guide for use in a liquid crystal display using at least one indirect light source, the light guide comprising a first side arranged to face image forming layers of the liquid crystal display, a second side opposite of the first side, and an in-coupling side facing the at least one indirect light source, characterized in that the in-coupling side is a beveled in-coupling side.
15 . A device, comprising a liquid crystal display as claimed in claim 1 .