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应用荧光粉转换法制备的白光数码管作为实验对象,利用同一批次蓝光芯片,调整荧光粉和环氧树脂不同混合比例,研究白光数码管色坐标位置和光通量关系。在20mA额定工作电流,环境温度25℃,湿度54%条件下,对被测白光数码管进行光通量和色坐标的测试,实验结果表明荧光粉比例增加致使白光光谱中黄绿光部分的发光能量增强,色坐标由(0.331,0.369)到(0.313,0.345)变化,光通量的值逐渐增加,这一实验结果和理论计算结果的发展趋势基本一致。在测试样品中最大光通量和最小光通量的值相差24.49mlm。研究结果表明利用色度学原理,调整荧光粉和环氧树脂混合比例,可以在一定程度上提高输出光通量。
The white light digital tube prepared by the phosphor conversion method was used as the experimental object. The same batch of blue light chips was used to adjust the mixing ratio of the phosphor and the epoxy resin. The relationship between the position and the luminous flux of the white digital tube was studied. Under the conditions of 20mA rated current, 25 ℃ ambient temperature and 54% humidity, the luminous flux and color coordinates of the tested white digital tube were tested. The experimental results show that the increase of the proportion of the phosphor led to the enhancement of the luminous energy of the yellow-green part of the white spectrum, The coordinates change from (0.331,0.369) to (0.313,0.345), and the luminous flux increases gradually. The experimental results are consistent with the trend of theoretical calculation. The difference between the maximum luminous flux and the minimum luminous flux in the test sample is 24.49 mlm. The results show that using the principle of colorimetry, adjusting the mixing ratio of phosphor and epoxy resin can improve the output luminous flux to a certain extent.