Patent ID: 6989877
Filing Date: 2006-01-24
Classification: G02F

Abstract:
1. A liquid crystal display device comprising: an upper substrate; a lower substrate; liquid crystals disposed between the upper substrate and the lower substrate; an upper polarizing layer formed over the liquid crystals; a lower reflective polarizing layer formed under the liquid crystals having a first transparent axis and a reflective axis being orthogonal; a lower polarizing layer formed under the liquid crystals having a second transparent axis; a lighting device disposed under the lower polarizing layer; and a reflecting polarizing plate provided near an outer surface of the lower polarizing layer having a third transparent axis which is nearly parallel with the second transparent axis of the lower polarizing layer, wherein, the lower reflective polarizing layer reflects a part of light which is parallel with the reflective axis and transmits a part of light which is parallel with the reflective axis, and the lower polarizing layer is disposed below the lower reflective polarizing layer; transparency of the lower reflective polarizing layer with respect to a light which is parallel with the reflective axis is in a range of 20% to 70%; an angle defined by the first transparent axis of the lower reflective polarizing layer and the second transparent axis of the lower polarizing layer is in range 60 degrees to 120 degrees; and an angle defined by the second transparent axis of the lower polarizing layer and the third transparent axis of the reflecting polarizing plate is in a range of −30 degrees to +30 degrees.