Patent ID: 7157844
Filing Date: 2007-01-02
Classification: H01J

Abstract:
1. A cathode ray tube device comprising: a cathode ray tube including a panel portion having an image-displaying phosphor screen on an inside surface of a faceplate, a neck portion containing an electron gun to emit an electron beam toward the phosphor screen, a funnel portion connecting the panel portion and the neck portion, and a stem portion closing an open end of the neck portion; a deflector containing a deflection yoke fitted on the cathode ray tube; a lens assembly disposed on the side of an outside surface of the faceplate; a coupler disposed between the lens assembly and the cathode ray tube to couple both of them to each other, and provided with a flange portion facing the outside surface of the faceplate; and a refrigerant liquid disposed in a space surrounded by the lens assembly, the coupler and the outside surface of the faceplate, wherein approximately the whole region of each of the inside and outside surfaces of the faceplate is a convex surface curved toward the electron gun and an outside-surface curvature of the faceplate is smaller than an inside-surface curvature of the faceplate, the flange portion of the coupler having a convex surface curved toward the electron gun.