Projection type liquid crystal display device

Abstract

Abstract PURPOSE:To obtain uniform chromaticity light at the projected image by using a blue dichroic prism having a dichroic film with an non-uniform reflection- transmission characteristic. CONSTITUTION:White color light incident from a light source 1 is incident on and separated to a dichroic mirror 2 which is set at 45 degrees against incident light, and the reflected blue light is radiated to a blue light bulb 7. The light transmitted mirror 2 is incident on a green dichromatic mirror 3, and the green light is reflected and the residual red light is transmitted. The reflected green light irradiates a green light bulb 8, and the transmitted red light irradiates a red light bulb 9. Each of those color lights synthesizes an image with a dichroic prism 10. The prism 10 is a rectangular prism constituted of 4 blocks and has a dichroic multilayered film having non-uniform reflection- transmission characteristics to calibrate the diffused lights of each of color lights transmitting the light bulbs.

Inventors

• 👤 Shigeru Hirasawa
• 👤 平沢　茂

Bibliographic Details