Abstract: A color liquid crystal display device fitted with a liquid crystal panel having a pixel formed with a plurality of primary color pixel components combined so that a reference white is reproduced, each of the primary color pixel components further having a corresponding liquid crystal shutter; and a back light unit disposed in the rear of the liquid crystal panel and used to give light in such a manner as to have the light pass through the liquid crystal shutters. In the color liquid crystal display device, the transmission factors of the liquid crystal shutters corresponding to the primary color pixel components are set substantially equal and the reference white is reproduced on the liquid crystal panel by means of the transmission factors thus set. With this arrangement, it becomes possible to set high the luminance of the reference white, to equalize the gradation levels depending on the primary color and to simplify the configuration of its driving circuit.

Abstract: A photoconductive target of an image pickup tube consists of a transparent substrate, a transparent conductor formed thereon, a photoconductive layer, containing Cd, Te and Se and formed on the conductive layer, and a high resistance layer formed on the photoconductive layer. The Molar ratios of Cd, Te and Se contained in the photoconductive layer satisfy a general formula CdTe.sub.1-x Se.sub.x where x falls within the range between 0.3 and 0.5.

Abstract: Disclosed is a photoconductive target of an image pickup tube having a transparent substrate, a transparent conductive layer formed on the transparent substrate, a photoconductive layer formed on the transparent conductive layer and containing cadmium, tellurium and selenium as major components, and a high resistance layer formed on the photoconductive layer. The film thickness of the photoconductive layer is more than 1,000 .ANG. and less than 10,000 .ANG. and the film thickness of the high resistance layer falls within the range between 2 and 10 .mu.m.