| 摘要 |
PURPOSE:To improve transmissivity of light from a light irradiation part by providing a condenser lens part for condensing the light from the light irradiation panel to a transmission zone. CONSTITUTION:When light from a light irradiation part enters a condenser lens part 6, it is first condensed through a convex lens 7a, and this condensed light is returned to parallel light again by a concave lens 8a to be projected to each of transmission zones S2. And a voltage is impressed by a TFT element, and the light passes the transmission zones S2 which is in the transparent state, while the light does not pass the transmission zones S2 with is not. As the light entering each of the transmission zones S2 is the condensed light entering a zone S1 of a convex lens part 7, an irradiation amount of the transmission zones S2 is increased compared with the whole light amount projected to a liquid crystal pane, which improve substantial transmissivity of light. |
