Liquid crystal panel device

Abstract

Abstract PURPOSE:To suppress the temperature raise of a liquid crystal panel (LCP) by arranging a polarizing means between the LCP constituted of a polarizing plate and a liquid crystal cell and a light source. CONSTITUTION:Light from the light source 6 is circularly polarized light or elliptically polarized light in a usual lamp and includes a polarized component vertical to the polarizing axis of a light source side polarizing plate 2 on the LCP in addition to a parallel polarized component. Since a polarizing plate 9 is added, the vertical component is adsorbed by the polarizing plate 9 and converted into heat, but since the polarizing plate 9 is heat-insulated by the LCP through an air layer, temperature in the LCP is not raised. But the air layer is not a complete heat-insulating layer, so that it is preferable to set up the thickness of the layer to a sufficiently thick value. A polarizing plate with high heat resistance is used for the polarizing plate 9 to be added and a polarizing plate with high polarization is used for the polarizing plate 2 on the LCP. Consequently, the reduction of picture quality and that of brightness can be removed.

Inventors

• 👤 Tsugio Murao
• 👤 村尾　次男

Bibliographic Details