PROJECTION OPTICAL PATH AND PROJECTION DEVICE

Disclosed are a projection optical path and a projection device. The projection optical path comprises a first converged light of a first dual-light source system (1) and a second converged light of a second dual-light source system (2); a first wavelength light, a second wavelength light, and a third wavelength light are respectively one of red light, green light, and blue light; a fourth wavelength light is within a wavelength range of the red light; the wavelength of the fourth wavelength light is defined as λ1; the wavelength of the one set as the red light among the first wavelength light, the second wavelength light, and the third wavelength light is λ2; λ1 is unequal to λ2; an excitation light source (50) emits an excitation light; and the excitation light is emitted to the first dual-light source system (1) or the second dual-light source system (2). According to the technical solution of the projection optical path and the projection device, the thermal effect generated by a red light source can be reduced, and the luminous efficiency of light sources having other colors can be improved, so that the brightness of a whole display screen is effectively improved.