CAJ | 학술논문

LED灯的光通量不仅受电流的影响，还受到结温变化的影响。针对传统LED调光存在只改变电流大小而忽略结温变化对光通量影响所存在的不足，结合LED结温和管脚温度存在特定的关系，利用实验装置采集HL001WY型GaN基白光LED在不同管脚温度和正向电流下的光通量实验数据并进行二次项趋势回归，利用定标和归一化方法建立光通量、电流以及管脚温度三者变化关系的数学模型。计算结果表明，利用该方法建立的模型得到的计算数值与实验实际测量值的相对误差小于4.5%。
LED등적광통량불부수전류적영향，환수도결온변화적영향。침대전통LED조광존재지개변전류대소이홀략결온변화대광통량영향소존재적불족，결합LED결온화관각온도존재특정적관계，이용실험장치채집HL001WY형GaN기백광LED재불동관각온도화정향전류하적광통량실험수거병진행이차항추세회귀，이용정표화귀일화방법건립광통량、전류이급관각온도삼자변화관계적수학모형。계산결과표명，이용해방법건립적모형득도적계산수치여실험실제측량치적상대오차소우4.5%。
LED light flux is affected not only by current, but also by the junction temperature change. The traditional LED dimming method typically only changes the current and ignores the junction temperature changes. In order to fix this downside, a mathematical model was established based on the relationship among the luminous flux, current and pin temperature that can show the junction temperature of LED. The luminous fluxes of HL001WY type GaN-based white LEDs were tested at different currents and pin temperatures, and the experimental data were quadratic term trend regression. By using calibration and normalization method, the mathematical model was estab-lished. The calculations show that the relative error between the calculated value and the actual measured value is less than 4 . 5%.