A projector, comprising: an image generator comprising a first light valve (DMDA) and a second light valve (DMDB), configured to generate an image beam (PIMG); a projection lens located on a transmission path of the image beam (PIMG) from the image generator; and a light combiner comprising a diffusing and filtering component, wherein the diffusing and filtering component is configured to generate a combined beam, and the image generator is configured to receive the combined beam from the diffusing and filtering component, wherein, in a first time period, the light combiner is configured to convert a first input beam into a conversion beam (CVLB), the first input beam being a first blue laser beam, wherein the conversion beam (CVLB) comprises a first partial beam and a second partial beam that have different wavelengths, and the first partial beam and the second partial beam are respectively transmitted to the first light valve (DMDA) and the second light valve (DMDB), characterized in that, in a second time period, the light combiner is configured to convert the first input beam into the conversion beam (CVLB), the light combiner is configured to transmit a second input beam to the image generator, the second input beam being a second blue laser beam, the diffusing and filtering component is configured to filter out one of the first partial beam and the second partial beam, and the other one of the first partial beam and the second partial beam is transmitted to one of the first light valve (DMDA) and the second light valve (DMDB), and the second input beam is transmitted to the other one of the first light valve (DMDA) and the second light valve (DMDB). an image generator comprising a first light valve (DMDA) and a second light valve (DMDB), configured to generate an image beam (PIMG); a projection lens located on a transmission path of the image beam (PIMG) from the image generator; and a light combiner comprising a diffusing and filtering component, wherein the diffusing and filtering component is configured to generate a combined beam, and the image generator is configured to receive the combined beam from the diffusing and filtering component, wherein, in a first time period, the light combiner is configured to convert a first input beam into a conversion beam (CVLB), the first input beam being a first blue laser beam, wherein the conversion beam (CVLB) comprises a first partial beam and a second partial beam that have different wavelengths, and the first partial beam and the second partial beam are respectively transmitted to the first light valve (DMDA) and the second light valve (DMDB), characterized in that, in a second time period, the light combiner is configured to convert the first input beam into the conversion beam (CVLB), the light combiner is configured to transmit a second input beam to the image generator, the second input beam being a second blue laser beam, the diffusing and filtering component is configured to filter out one of the first partial beam and the second partial beam, and the other one of the first partial beam and the second partial beam is transmitted to one of the first light valve (DMDA) and the second light valve (DMDB), and the second input beam is transmitted to the other one of the first light valve (DMDA) and the second light valve (DMDB).