A light source system comprising: a first light source (1, 801) for generating a first wide spectrum light comprising at least a first primary color and a second primary color; a second light source (3, 103, 802, 904) for generating a second light; a light splitting and light combining device, disposed on light paths of the first light source (1, 801) and the second light source (3, 103, 802, 904), for splitting the first wide spectrum light into a third light comprising the first primary color and travelling along a first path (11, 81) and a fourth light comprising the second primary color and travelling along a second path (12, 82); a first spatial light modulator (106, 805, 907, 1013), for receiving the third light from the first path (11, 81) and modulating the received light; a second spatial light modulator (107, 806, 908, 1014), for receiving the fourth light and at least a part of the second light from the second path (12, 82) and modulating the received light; and a control device (108, 807, 909, 1015), electrically coupled to the first light source (1, 801), the second light source (3, 103, 802, 904), the first spatial light modulator (106, 805, 907, 1013) and the second spatial light modulator (107, 806, 908, 1014), for controlling the first light source and the second light source and controlling the first spatial light modulator (106, 805, 907, 1013) and the second spatial light modulator (107, 806, 908, 1014) to modulate light, characterized in that the second light has a spectral shape different from the first wide spectrum light and comprises at least a third primary color different from the first and second primary colors; the light splitting and light combining device is configured to direct at least a part of the second light comprising the third primary color to travel along the second path (12, 82); and the control device (108, 807, 909, 1015) is adapted to control the first light source (1, 801) and the second light source (3, 103, 802, 904) to turn ON/OFF, wherein the ON states of the first light source (1, 801) and the second light source (3, 103, 802, 904) partially overlap but do not completely overlap within a same period. a first light source (1, 801) for generating a first wide spectrum light comprising at least a first primary color and a second primary color; a second light source (3, 103, 802, 904) for generating a second light; a light splitting and light combining device, disposed on light paths of the first light source (1, 801) and the second light source (3, 103, 802, 904), for splitting the first wide spectrum light into a third light comprising the first primary color and travelling along a first path (11, 81) and a fourth light comprising the second primary color and travelling along a second path (12, 82); a first spatial light modulator (106, 805, 907, 1013), for receiving the third light from the first path (11, 81) and modulating the received light; a second spatial light modulator (107, 806, 908, 1014), for receiving the fourth light and at least a part of the second light from the second path (12, 82) and modulating the received light; and a control device (108, 807, 909, 1015), electrically coupled to the first light source (1, 801), the second light source (3, 103, 802, 904), the first spatial light modulator (106, 805, 907, 1013) and the second spatial light modulator (107, 806, 908, 1014), for controlling the first light source and the second light source and controlling the first spatial light modulator (106, 805, 907, 1013) and the second spatial light modulator (107, 806, 908, 1014) to modulate light, characterized in that the second light has a spectral shape different from the first wide spectrum light and comprises at least a third primary color different from the first and second primary colors; the light splitting and light combining device is configured to direct at least a part of the second light comprising the third primary color to travel along the second path (12, 82); and the control device (108, 807, 909, 1015) is adapted to control the first light source (1, 801) and the second light source (3, 103, 802, 904) to turn ON/OFF, wherein the ON states of the first light source (1, 801) and the second light source (3, 103, 802, 904) partially overlap but do not completely overlap within a same period.