摘要:
A projection cathode-ray tube includes a multilayered interference film interposed between a face plate and a cathode-ray tube. In order to improve brightness in a direction of the normal, then on a face plate, a phosphor layer is composed of a first layer substantially consisting of large size phosphor particles and a second layer substantially consisting of small size phosphor particles. In addition, a phosphor density of the phosphor layer is set from 20 to 50% larger than that necessary to produce a maximum brightness on a cathode-ray tube without the multilayered interference film. The phosphor particles of the phosphor layer are preferably material having a high reflectance.
摘要:
The object of the present invention is to provide a gas discharge display device having improved luminous efficiency by effectively using ultraviolet ray, which is absorbed in a partition wall or a protective film and the like without contributing to excitation of a fluorescent material. By adding gadolinium to the materials excluding the fluorescent material among structures surrounding the discharge cell, ultraviolet ray having a wavelength of 315 nm is generated, which can excite the fluorescent material. The ultraviolet ray excites the fluorescent material to generate visible light, and then, electric-light conversion efficiency is improved.
摘要:
A phosphor excellent in its temperature-versus-luminance characteristics, which is represented by the following formula:(La.sub.1-x-y Ce.sub.x Tb.sub.y) mBO.sub.3.nPO.sub.4(where: 0.15.ltoreq.x.ltoreq.0.45; 0.1.ltoreq.y.ltoreq.0.2; and 0.01.ltoreq.m/(m+n).ltoreq.0.045).
摘要翻译:(La1-x-yCexTby)mBO3.nPO4(其中:0.15≤x≤0.45;0.1≤y≤0.75)表示的温度对亮度特性优异的荧光体, = 0.2;和0.01 m /(m + n) = 0.045)。