Fu-chun JIANG, Si-yu HE, Yuan-hai LIU, Wen LIU, Guang-yue CHAI, Zhi-gang ZHAO, Bai-kui LI. A Measurement Method Based on Characteristic Spectral Parameter for Determining Junction Temperature of LED[J]. Acta Photonica Sinica, 2020, 49(3): 0330003
- Acta Photonica Sinica
- Vol. 49, Issue 3, 0330003 (2020)
Fig. 1. Spectrogram of WLED with YAG phosphor
Fig. 2. The schematic and physic diagram of LED junction temperature measurement system based on spectral parameters
Fig. 3. Spectrogram of WLED with high color temperature
Fig. 4. T j-I calibration function curve of WLED with high color temperature
Fig. 5. ΔT j-ΔI calibration function curve of WLED with high color temperature
Fig. 6. Spectrogram of WLED with low color temperature
Fig. 7. ΔT j-ΔI calibration function curve of WLED with low color temperature
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Table 1. Relative strength of spectral trough of WLED with high color temperature at different temperatures
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Table 2. The difference of relative intensity of spectral trough of WLED with high color temperature at between different temperature and reference state
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Table 3. Relative strength of spectral trough of WLED with low color temperature at different temperatures
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Table 4. Comparisons with the results of Graphics′ T3Ster instrument
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