Projection type color display device

Abstract

Abstract PURPOSE:To improve contrast characteristics and to reduce the whole size of a device by using a liquid crystal panel obtained by integrating thin film transistors (TRs) like a matrix. CONSTITUTION:While light beams radiated from a light source 21 are condensed by a spherical reflector 2 and a condenser lens 23 and divided into the three primary colors by a red reflection dichroic mirror 25 and a blue reflection dichroic mirror 26 to irradiate a red display liquid crystal panel 29a, a green display liquid crystal panel 29G and a blue display liquid crystal panel 29B by the three primary colors. At that time, the three primary colors are balanced by a concave mirror 27. Transparent picture element electrodes 44 and counter electrodes 46 are formed on a quartz substrate 40 for a liquid crystal panel like a matrix and thin film TRs 43 are arranged active elements in each picture element to execute display excellent in contrast characteristics. The image of the three primary colors are synthesized by a dichromic prism 30 and expansively projected to a screen by a projection lens 20.

Inventors

• 👤 Fumitaka Yajima
• 👤 章隆 矢島

Bibliographic Details