The incandescent of ZnS,Cu,Cl for the AC-driven electroluminescence(EL) device was synthesized by the addition of additive agents using phosphor. According to the concentration of Cu,Cl, it is possible to realize the emission color from blue to green. In this paper, ZnS:Cu,Cl was prepared by combini...
The incandescent of ZnS,Cu,Cl for the AC-driven electroluminescence(EL) device was synthesized by the addition of additive agents using phosphor. According to the concentration of Cu,Cl, it is possible to realize the emission color from blue to green. In this paper, ZnS:Cu,Cl was prepared by combining the fluorescent element and the driving circuit of the device have been studied using various methods for improving light emitting property. In this study, to improve the light emission characteristics of an AC-driven EL device, various synthesis and device manufacturing method for use in a variety of applications are simplified. The phosphor was synthesized using solid-phase reaction method to optimize the phosphor synthesis parameters. Phosphor synthesis was achieved with the raw material mixing step, a primary heat treatment step, same as the second heat step and the total of the three step process. The best conditions for increasing the emission intensity of the raw material mixing the synthesize Cu2+ 0.03 mol% and 0.13 mol% showed a similar emission characteristic as blue/green phosphor commercially available. When the first heat temperature is 1100℃~1150℃, the size of the phosphor was grown optimally. After that, the second heat treatment at 750℃ for 2h of heating process, the crystal structure of the phosphor transit appropriately. Through the above process, phosphor and the dielectric was obtained to produce an EL device with Ag paste. Three kinds of material needed for the size and shape of a regular screen printing method is a printing method easy for the coating thickness. Taking into consideration the nature of the three materials to the ITO Film is commonly used as a transparent electrode was produced for each of the screen plate. Printing is phosphor-dielectric-Ag paste was conducted in order. Screen plate is 3.5×3.5, 180mesh(phosphor), 4×4, 200mesh(dielectric), 2×2, 250mesh(Ag paste)was used. After printing each material for 15min at 130℃ and after passing through the drying process, then it was applied to the material. This time, the dielectric was produced by repeating the process tow times. This paper presents ac drive circuit of electroluminescent lamp using the boost dc/ac inverter. The circuit consists of dc/dc converter and dc/ac inverter at output voltage 300 Vp-p, 400 Hz square wave used by dc input voltage from battery 12 V. It can operated at high conversion efficiency. The results were output voltage constant, output current 300 mAp-p, luminescence at 26.92 cd/m2 and 88% efficiency. This power of the circuit was 6.44W. This inverter is suitable for used with low input voltage, high current, and low power loss due to low switching loss.
The incandescent of ZnS,Cu,Cl for the AC-driven electroluminescence(EL) device was synthesized by the addition of additive agents using phosphor. According to the concentration of Cu,Cl, it is possible to realize the emission color from blue to green. In this paper, ZnS:Cu,Cl was prepared by combining the fluorescent element and the driving circuit of the device have been studied using various methods for improving light emitting property. In this study, to improve the light emission characteristics of an AC-driven EL device, various synthesis and device manufacturing method for use in a variety of applications are simplified. The phosphor was synthesized using solid-phase reaction method to optimize the phosphor synthesis parameters. Phosphor synthesis was achieved with the raw material mixing step, a primary heat treatment step, same as the second heat step and the total of the three step process. The best conditions for increasing the emission intensity of the raw material mixing the synthesize Cu2+ 0.03 mol% and 0.13 mol% showed a similar emission characteristic as blue/green phosphor commercially available. When the first heat temperature is 1100℃~1150℃, the size of the phosphor was grown optimally. After that, the second heat treatment at 750℃ for 2h of heating process, the crystal structure of the phosphor transit appropriately. Through the above process, phosphor and the dielectric was obtained to produce an EL device with Ag paste. Three kinds of material needed for the size and shape of a regular screen printing method is a printing method easy for the coating thickness. Taking into consideration the nature of the three materials to the ITO Film is commonly used as a transparent electrode was produced for each of the screen plate. Printing is phosphor-dielectric-Ag paste was conducted in order. Screen plate is 3.5×3.5, 180mesh(phosphor), 4×4, 200mesh(dielectric), 2×2, 250mesh(Ag paste)was used. After printing each material for 15min at 130℃ and after passing through the drying process, then it was applied to the material. This time, the dielectric was produced by repeating the process tow times. This paper presents ac drive circuit of electroluminescent lamp using the boost dc/ac inverter. The circuit consists of dc/dc converter and dc/ac inverter at output voltage 300 Vp-p, 400 Hz square wave used by dc input voltage from battery 12 V. It can operated at high conversion efficiency. The results were output voltage constant, output current 300 mAp-p, luminescence at 26.92 cd/m2 and 88% efficiency. This power of the circuit was 6.44W. This inverter is suitable for used with low input voltage, high current, and low power loss due to low switching loss.
Keyword
#교류구동 전계발광 소자 EL
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