Small lighting knowledge | do you know what is a gas discharge light source? - China lighting network

Gas discharge light source is made by using the theory of gas discharge light. Gas under normal condition is not a conductor. When the gas atoms by a certain energy collisions of the electrons by excitation and ionization and shine. When the discharge current is very small, discharge in the stage of glow discharge, the discharge current increases to a certain extent, gas discharge in low voltage high current discharge, this is the arc discharge. We can put the gas discharge light source can be divided into three categories, 1) Low pressure discharge light source is the total pressure of the gas in the lamp about 1. 01×105Pa( PASCAL) Which is 1. 01 a standard atmospheric pressure. There are two kinds of low pressure discharge light glow discharge source ( The neon lights, neon light, etc. ) And the arc discharge light source ( Low voltage sodium lamp, fluorescent lamp, ultraviolet lamp part induction electrodeless lamp, etc. ) 。 Low pressure gas discharge lamp luminous body is bigger, luminous evenly. The working current is lesser, glow discharge lamp within a few hundred ma, arc discharge in 1 a ( Amp) Or less. Lamp power and therefore smaller, generally within 200 w. The low pressure gas discharge lamp from the start the way has two kinds of cold cathode and hot cathode. Cold cathode lamp does not need to preheat direct high voltage start, such as neon lights. Hot cathode lamp should be preheated, restart when electron emission temperature reached filament, such as preheating type fluorescent lamp, preheat start should be carried out with appropriate starter. After the low pressure gas discharge lamp in the lights lit out general can restart immediately lit. ( 2) High pressure discharge light source lamp within the total pressure of the gas in the ( 1 - 10) ×105Pa. High pressure gas discharge lamp working current can be larger, it is big prosperous work flow, thus the lamp power can do it. It does not need to preheat start, with appropriate trigger start directly. But the high pressure gas discharge lamp is generally not after the lights lit out can restart immediately ignite, need a period of time between stay cool light before start. ( 3) Gases in super high pressure discharge light source lamp total pressure is greater than 1. 01 x 104 pa, or greater than 10 standard atmospheric pressure. Light source with high pressure xenon lamp, high pressure mercury lamp, etc. Light is small, the approximate high brightness point light, easy to control the light. YanZhiXiang

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