SURFACE LIGHT SOURCE WHICH SELECTIVELY IRRADIATES TWO LINEARLY POLARIZED LIGHT BEAMS IN POLARIZED STATES DIFFERENT FROM EACH OTHER AND LIQUID CRYSTAL DISPLAY APPARATUS USING THE SAME

摘要

If the light source is a light source that selectively emits the polarization state of two different polarization , two opposing of the plate surface and which is made of a transparent plate having a cross-section which surrounds the plate surface thereof , and the two light guide plate from the emitting surface to emit the polarized light , the emitted light from the exit surface of the light guide plate toward the direction of the normal of the light guide plate substantially changing the traveling direction of light emitted by the optical element is made to emit . And a surface light source , is disposed on the viewing side of the surface light source , either one of the two separated first and second regions and the polarization control element for rotating the polarization plane of linearly polarized light by passing through a predetermined angle , and by the liquid crystal display element disposed on the viewing side to form a liquid crystal display device .