| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a projector light source module that extends the use life of a red light source and reduces projector maintenance frequency. <P>SOLUTION: A projector light source module 1 comprises a dichroic mirror 10, a red light source 22, a blue light source 20, and a green light source 21. The dichroic mirror 10 has a first reflection surface 11 and a second reflection surface 12. An included angle greater than 165 degrees but smaller than 180 degrees is formed between the normal lines of the first and second reflection surfaces 11 and 12. The first reflecting surface 11 is plated with a first dichroic film, and the second reflecting surface 12 is plated with a second dichroic film. The first and second dichroic films transmit red light. The red light source 22 is located at the side of the first reflecting surface 11 of the dichroic mirror 10. The blue light source 20 and green light source 21 are located at the side of the second reflecting surface 12 of the dichroic mirror 10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
