Transmission type liquid crystal display device

Abstract

Abstract PURPOSE:To eliminate the visual-field dependency of display contrast, to obtain uniform display, and to display with high contrast by projecting and displaying information of a liquid crystal display element on a semitransparent screen. CONSTITUTION:A light source 4 such as a lamp is arranged in such a slanting direction that the contrast of the rear surface side of the liquid crystal display element 2 is increased, and light from the light source is collimated by a convex lens 6 provided between the light source 4 and liquid crystal display element 2 to illuminate the liquid crystal display element 2. Consequently, information on a character, a graph, etc., projected on the screen 1 placed on the front surface side of the display element 2 has uniform high contrast. When a Fresnel lens 7 is provided, the light from the light source 4 while collimated is caused to strike the display element 2 at a specific angle of incidence (5-45 deg., preferably, 10- 30 deg.). The lens 7 is made normally of acrylic resin.

Inventors

• 👤 Jun Nakanowatari
• 👤 旬 中野渡
• 👤 Hiroshi Kikuchi
• 👤 啓 菊地

Bibliographic Details