Abstract: A video image projection system uses an improved cathode ray tube assembly incorporating a projection cathode ray tube within a housing with a light transmissive heat transfer fluid contained within the housing and surrounding the exterior surface of a portion of the cathode ray tube to transfer heat between the cathode ray tube faceplate and a portion of the cathode ray tube bowl. The heat transfer fluid may also cooperate with a novel faceplate structure on the cathode ray tube to store capacitatively an electrical charge to increase the dynamic range of brightness of the projected image.

Abstract: A color television image projector in which three television projection cathode ray tubes, one for each television primary color, are arranged in a T-shaped array with the face plates of the cathode ray tubes placed in a chamber, and crossed dichroic mirrors are located in the chamber for presenting a single image, composed of the primary color images in superimposed registration, at a window in the chamber. The chamber is filled with a liquid having an index of refraction approximately the same as that of the face plates, the mirror substrates, and the window, and cooling means is associated with the chamber for removing heat from the liquid in the chamber. A projection lens system is associated with the window for projecting the single image presented at the window.