LED형광등에서 Bat-Wing배광 구현을 위한 렌즈 형상에 관한 연구

Abstract

LED lightings have advantages of saving energy and controlling light distribution easily. Among the benefits of the fluorescent lamps outstanding ones are the convenience of exchanging the lamps and the bat-wing intensity distribtution to give uniform illumination over the working surfaces. Thus achieving the bat-wing distribution in LED tube lamp using lens array will reduce the numbers of the lamps to be used and consequently energy consumption. To accomplish lens array for the LED tube lamp, bar type LED lens was simulated with and without an outer diffuser. The lens materials was set to be PMMA and the parameters of the crosssectional structure of the lens were analyzed to simulate an optimized bat-wing intensity distribution. During the simulation for the proposed lensed LED tube lamp, it was concluded that an optimum bat-wing angle was located between 30° and 40°. Thus the proposed lensed LED tube lamp was simulated successfully having the same intensity distribution as in the conventional fluorescent luminaire and resulting in energy savings around 15 % to 27 %. The proposed lensed LED tube lamps are under construction and several problems for the lamp are being treated.