Light source system and image projection system

A light source system, comprising:

• a light source for generating an excitation light;
• a moving color device disposed to receive the excitation light, the moving color device including a first area and a second area, wherein the first area includes two or more first segments, and the second area includes two or more second segments;
• a driving device for driving the moving color device to move periodically to generate a first light sequence in a first working mode and to generate a second light sequence in a second working mode, wherein the first light sequence contains first lights generated sequentially by the two or more first segments and the second light sequence contains second lights generated sequentially by the two or more second segments, the first light sequence being different from the second light sequence;
• and
• a switching device for switching the moving color device between the first working mode and the second working mode,
• wherein the first lights are generated periodically in a first plurality of consecutive time periods in the first working mode, the second lights are generated periodically in a second plurality of consecutive time periods in the second working mode, the first plurality of consecutive time periods and the second plurality of consecutive time periods being different time periods and non-interleaving with each other during the first working mode and during the second working mode.