Projection type display device

Abstract

Abstract PURPOSE:To obtain bright projected images having high display quality by providing a 1st condenser lens, 2nd condenser lens and a total reflecting mirror which aligns the optical axis direction of a 1st (or 2nd) polarization component to the optical axis direction of a 2nd (or 1st) polarization component in a 1st (or 2nd) position. CONSTITUTION:Condensing spots A and B of the projection type display device constituted by using a twisted nematic type liquid crystal display device are formed in proximity to each other and the optical path of the condensing spot B is synthesized to be nearly aligned to the optical path of the condensing spot A by the total reflecting mirror 8 and, therefore, the generation of the discontinuous parts of the image at the boundary line is obviated and the projected images having high display quality are obtd. Either one polarization component of the two polarization components once divided by a polarization beam splitter 4 is converted in phase by a polarization plane converting means 5, by which the polarization planes are unified and thereafter, the beams are synthesized again; therefore, the optical path for the illuminating light to be made incident on the liquid crystal display is made into one. Then, the bright projected images are obtd. with the one liquid crystal display device.

Inventors

• 👤 Kazuhiro Shibata
• 👤 和宏 柴田
• 👤 Hiroshi Hamada
• 👤 浩 浜田

Bibliographic Details