Herein, we have developed photosensitive ternary cholesteric liquid crystals (T-N*-LCs) by doping achiral dichroic dye PBCy and chiral inducer R/S-1 in 5CB. Under alternating UV and visible light treatment, different isomers of PBCy exhibited varying order parameter (SF) values in 5CB, resulting in T-N*-LCs showing a dynamic CPL switch from strong (SF = 0.18. glum = +0.45/-0.48) to weak (SF = 0.10. glum = +0.23/-0.21). This alteration allows for the regulation of the CPL signal of T-N*-LCs, while keeping the helical pitch and chiral spin of T-N*-LCs unchanged. Based on these phototunable CPL and fluorescence behaviors, a geminate mode device carrying different information could be prepared.