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The working principle of backlight light
Jul 17, 2017

In glow discharge, the Townsend third ionization coefficient is two electron emission coefficients of the cathode surface under ion bombardment, this process is generally the auger and neutralization process of ions on the cathode surface (auger neutralization of an ion), also known as Hagstrum theory (see also: Homer D. Hagstrum, germ of auger ejection to electrons by Ions, "Phys. Rev. 96, (1954) 336–365). When the positive ions move to the cathode surface, the free electrons in the cathode material are compounded and the ionization energy is released, and the other electrons in the cathode obtain the ionization energy, overcome the surface barrier and release from the cathode, which is called two electron emission, which is an indirect field emission process. At the same time, positive ions in the cathode surface near the formation of a positive ion cloud, the positive ion cloud relative to the cathode as a positive field, there is also a direct field of emission. Therefore, CCFL can be either DC or AC driven.