[1] Dai Q, Shan Q F, Lam H et al. Circadian-effect engineering of solid-state lighting spectra for beneficial and tunable lighting[J]. Optics Express, 24, 20049(2016).

[2] Mei J J, Liu L L. Research on white light color temperature deviation based on tricolor LEDs[J]. Acta Optica Sinica, 36, 0833001(2016).

[3] Lee A T L, Chen H T, Tan S C et al. Precise dimming and color control of LED systems based on color mixing[J]. IEEE Transactions on Power Electronics, 31, 65-80(2016).

[4] Wu M, Deng D G, Huang F F, its fabrication method: CN108192614A[P] et al. -06-22(2018).

[5] Guo Z Q, Gao Y L, Lü Y J et al. Spectrum optimization of tri-color white LEDs at fixed correlated color temperature[J]. Journal of Optoelectronics·Laser, 22, 992-996(2011).

[6] Chen J B, Yu J H, Gao Y F et al. Study on tunable color temperature white LED light source withultra-high color rendering index[J]. Acta Optica Sinica, 35, 1023002(2015).

[7] Tian H J, Liu J X, Hong Z et al. Dimming method for R/G/B/WW light emitting diode based on four channels' pulse width modulation[J]. Acta Optica Sinica, 38, 0423002(2018).

[8] Jin Y Z, Han Q Y, Zhang S D. Simulation and calculation of high quality white light mixed with three channels and six color LEDs[J]. China Illuminating Engineering Journal, 26, 54-59(2015).

[9] Wu C C, Hu N C, Chen J N et al. Parameterised LED current regulator for pulse width modulation switch delay for accurate colour mixing in multi-LED light sources[J]. Lighting Research & Technology, 46, 171-186(2014).

[10] Song P C, Wen S S, Chen Y C. Research on color mixing based on RGBW-LEDs[J]. Acta Optica Sinica, 35, 0923004(2015).

[11] Xu M S, Zhang H X, Zhou Q B et al. Effects of spectral parameters on the light properties of red-green-blue white light-emitting diodes[J]. Applied Optics, 55, 4456(2016).

[12] Jing Q C, Jiao S L[M]. Colorimetry(1979).

[13] Dai Q, Cai W, Hao L et al. Spectral optimisation and a novel lighting-design space based on circadian stimulus[J]. Lighting Research & Technology, 50, 1198-1211(2018).

[14] Yu C Y, Jin P, Zhou Q F. Optimizing color rendering for mixed-color white light LED[J]. Spectroscopy and Spectral Analysis, 35, 1316-1319(2015).

[15] Hu Y B, Zhuang Q R, Liu S W et al. Study on LEDs synthesized high color rendering index white light source[J]. Acta Optica Sinica, 36, 0323003(2016).