Patent ID: 9128220
Filing Date: 2015-09-08
Classification: G02B,G02F

Abstract:
1. A display device, comprising: a lighting device having a light source; a display panel; and a light guiding element having a first principal surface, a second principal surface which opposes the first principal surface, a first lateral surface which intersects with the first principal surface and the second principal surface, and a second lateral surface which opposes the first lateral surface, the light guiding element being capable of allowing light incoming from the first lateral surface to propagate between the first principal surface and the second principal surface, wherein the light guiding element includes a portion in which a refractive index varies substantially continuously from the first principal surface toward the second principal surface, the light source is positioned so as to emit light toward the first lateral surface of the light guide element, and the lighting device is provided on a viewer side of the display panel.