I. Overview Fluorescent lamps are low-pressure mercury discharge photoluminescence electric light sources. Its luminescence mechanism involves two basic physical processes: gas mercury discharge and photoluminescence.
The fluorescent lamp consists of two parts: an energy-saving fluorescent tube and an electronic ballast (drive power source). Energy-saving fluorescent tubes and electronic ballasts (driving power sources) interact and interact with each other during the ignition process, forming a number of macroscopic technical characteristics such as fluorescent lamps. Light decay is one of the many macroscopic technical characteristics of fluorescent lamps.
In the ignition process of Qihui, the light decay of fluorescent lamps is a complex quantitative process in the two basic physical processes of gas mercury discharge and photoluminescence. In this quantitative process, a series of physical and chemical motion processes in the microscopic field of energy-saving fluorescent tubes are internal factors, and the electrical characteristics of electronic ballasts (driving power sources) are external factors. Internal factors are dominant and external factors are conditions. External factors act through internal factors. (Qingdao Franck Microelectronics, Han Yurong's feature article. Some people deleted the author's unit name and the author's name. Then, or the whole article or large section, directly applied to their own website. I hope not to do this in the future.)
Therefore, the light decay of fluorescent lamps mainly comes from the light decay caused by impurity impurities in the energy-saving fluorescent tube, the light decay caused by the phosphor powder, the light decay caused by the lamp glass, and the output of the electronic ballast (drive power source). Four aspects of light attenuation caused by characteristics.
In the process of igniting and igniting fluorescent lamps, the above four factors are simultaneously present. And four factors affect each other. The ignition period of Kaihui is different. The ignition state of Qihui is different, and the aspects and factors that play a leading role in light decay are different.
Second, the mechanism of light decay caused by heterogeneous impurities in fluorescent lamps (I) Analysis of source pathways of heterogeneous impurities The impurity impurities in energy-saving fluorescent tubes are mainly derived from two sources of raw materials for lamps and production processes.
1. The technical performance of the raw materials and the lack of phase purity (1), the inert gas charged: such as krypton (Kr) gas, argon (Ar) gas gas is not pure enough, containing impurity impurities.
(2) The metal mercury (Hg) charged is not pure enough to release the impurity in the phase during the ignition of the fluorescent lamp.
(3), the cathode guide wire and the filament, during the ignition and ignition process of the fluorescent lamp, a physical and chemical reaction is generated to release the impurity of the phase.
(4) The phosphor or phosphor coating contains heterogeneous impurities, which are free from the energy-saving fluorescent tube during the ignition of the fluorescent lamp.
(5) The purity of the electronic powder is not enough. During the ignition process of the fluorescent lamp, the impurity of the phase is free in the energy-saving fluorescent tube.
The fluorescent lamp consists of two parts: an energy-saving fluorescent tube and an electronic ballast (drive power source). Energy-saving fluorescent tubes and electronic ballasts (driving power sources) interact and interact with each other during the ignition process, forming a number of macroscopic technical characteristics such as fluorescent lamps. Light decay is one of the many macroscopic technical characteristics of fluorescent lamps.
In the ignition process of Qihui, the light decay of fluorescent lamps is a complex quantitative process in the two basic physical processes of gas mercury discharge and photoluminescence. In this quantitative process, a series of physical and chemical motion processes in the microscopic field of energy-saving fluorescent tubes are internal factors, and the electrical characteristics of electronic ballasts (driving power sources) are external factors. Internal factors are dominant and external factors are conditions. External factors act through internal factors. (Qingdao Franck Microelectronics, Han Yurong's feature article. Some people deleted the author's unit name and the author's name. Then, or the whole article or large section, directly applied to their own website. I hope not to do this in the future.)
Therefore, the light decay of fluorescent lamps mainly comes from the light decay caused by impurity impurities in the energy-saving fluorescent tube, the light decay caused by the phosphor powder, the light decay caused by the lamp glass, and the output of the electronic ballast (drive power source). Four aspects of light attenuation caused by characteristics.
In the process of igniting and igniting fluorescent lamps, the above four factors are simultaneously present. And four factors affect each other. The ignition period of Kaihui is different. The ignition state of Qihui is different, and the aspects and factors that play a leading role in light decay are different.
Second, the mechanism of light decay caused by heterogeneous impurities in fluorescent lamps (I) Analysis of source pathways of heterogeneous impurities The impurity impurities in energy-saving fluorescent tubes are mainly derived from two sources of raw materials for lamps and production processes.
1. The technical performance of the raw materials and the lack of phase purity (1), the inert gas charged: such as krypton (Kr) gas, argon (Ar) gas gas is not pure enough, containing impurity impurities.
(2) The metal mercury (Hg) charged is not pure enough to release the impurity in the phase during the ignition of the fluorescent lamp.
(3), the cathode guide wire and the filament, during the ignition and ignition process of the fluorescent lamp, a physical and chemical reaction is generated to release the impurity of the phase.
(4) The phosphor or phosphor coating contains heterogeneous impurities, which are free from the energy-saving fluorescent tube during the ignition of the fluorescent lamp.
(5) The purity of the electronic powder is not enough. During the ignition process of the fluorescent lamp, the impurity of the phase is free in the energy-saving fluorescent tube.