Pioneer Electronic Corporation

Masataka Izawa

Masami Nishida

Kunimoto Tsuchiya

Tadashi Yoshida

Nozomu Kikuchi

Manabu Akagi

Masayuki Akiyama

Hirokazu Izumi

Ryuji Miyazaki

Kazuto Sato

A stereoscopic image display system has a left/right stereoscopic image signal generator for alternately generating left-eye and right-eye image signals at every field, a screen for projecting image light, a liquid crystal shutter. The liquid crystal shutter has a response speed of 1 ms or less, and a contrast between black and white of 100 to 1 or more at a central wavelength of an emission spectrum of a CRT in both parallel and crossing modes of the polarizing plates of the shutter, and a cell gap of 3 .mu.m or less. The screen comprises a Fresnel lens and a lenticular sheet, and the lenticular sheet is disposed in a direction so that a polarizing condition does not generate a phase difference based on the lenticular sheet.

Stereoscopic image display system

A liquid crystal display device comprises a converging reflector, a liquid crystal panel, a condenser lens and a projection lens, wherein a correlation between these optical parts and structure of sizes of the optical parts is considered. Accordingly, a convergence efficiency of the device as whole system can be improved. A converging reflector comprises a light source and a reflecting mirror reflecting a light from the light source, wherein a curved plane shape of the mirror is offset radially to the same length as a radius of a light emitting tube of the light source. Accordingly, a convergence efficiency of the converging reflector can be improved.

Liquid crystal display device with improved convergence efficiency and

A liquid crystal projector is obliquely disposed in a lower front portion of a cabinet. A first mirror for reflecting light beams of R, G and B coming from the liquid crystal projector is disposed obliquely with respect to the top-bottom, right-left and front-rear directions of the cabinet. A second mirror is disposed so as to be inclined toward a screen. With this configuration, the optical axis of the light beams that extends from the liquid crystal projector to the screen is folded back three-dimensionally. In the liquid crystal projector, the optical axis of a condensing reflector may be slightly inclined from the central axis of a projection lens.

Liquid crystal type rear-projection television with a reduced cabinet

A three color separation/synthesis mirror device for a liquid crystal projector comprises four dichroic mirrors whose joint part has a V-shaped notch in which a higher refractive index is filled thereby to eliminate stray lights. The device may have a prism at the joint part for causing an emitted light to be parallel with an incident light.

Three color separation/synthesis mirror device

A converging reflector comprises a linear light source having two end points located with a predetermined spacing therebetween, a first reflection surface having a curvature so as to have a focal point at one of the two end points, and a second reflection surface having another curvature so as to have a focal point at the other of the two end points. Accordingly, a light from the linear light source is incident onto the first and second reflection surfaces. Thus, this reflector can project a light as an ideal plane of projection, resulting in improved projection efficiency.

Growing community of inventors

Tokyo, Japan

Masataka Izawa