ELECTRON GUN OF COLOR CATHODE RAY TUBE REDUCING THERMAL EXPANSION OF ELECTRODES

摘要

PURPOSE: the color cathode ray tube of electron gun, to reduce the electrode of thermal deformation, therefore, picture quality and excitation purity improve and pass through the blanking voltage of difference between reducing by eliminating hot drift of convergence phenomenon and white balance feature. CONSTITUTION: the invention discloses axial type electron guns, it includes cathode, G1 electrodes (100), G2 electrodes, G3 electrodes and G2 electrode surfaces pair. Concave-convex (rE, rE ', gE, gE ', bE, bE ') it is formed in each electron beam through-hole (R/G/B) at least G1 electrodes (100), G2 electrodes and G3 electrodes, therefore, calorific intensity and heater are improved in cathode, and reduce thermal deformation. To which picture quality and excitation purity improve and pass through the blanking voltage of difference between reducing by eliminating hot drift of convergence phenomenon and white balance feature.