Projector red and blue laser light source system

Abstract

The invention discloses a projector red and blue laser light source system, comprising a first B-LD array, a fluorescence color wheel, a second B-LD array and a B reflector array, and being characterized in that an R area of the fluorescence color wheel is a red light transmission area, a B area is a blue light transmission area, and a G area is coated with green fluorescent powder; the system also comprises an R-LD array opposite to the second B-LD array, and an R reflection DM mirror array arranged in the light ray propagation direction of the R-LD array; a first RB reflector is arranged in the transmission direction of the fluorescence color wheel, a second RB reflector is arranged in the reflection direction of the first RB reflector, an RB reflection DM mirror is arranged in the reflection direction of the second RB reflector, and a light collection rod is arranged in the reflection direction of the RB reflection DM mirror; a G reflection DM mirror is arranged in the reflection direction of the fluorescence color wheel, and the RB reflection DM mirror is arranged in the reflection direction of the G reflection DM mirror. A color shift phenomenon of red laser obtained by the light collection rod is avoided, and the red color of a projector is reproduced very truly.

Description

technical field [0001] The invention relates to the field of projectors, in particular to a projector red and blue laser light source system. Background technique [0002] Laser diodes are used more and more frequently in optical products, and recently a large number of civil laser light source products have begun to be put on the market, such as the recent popular laser light source projectors on the market, among which the laser projector light source system such as figure 1 As shown, the second B_LD array 2' is arranged on the side of the first B_LD array 1' and is used in conjunction with the B mirror array 3'; the blue laser light emitted by the second B_LD array 2' is reflected by the B mirror array 3' Together with the blue laser light emitted by the first B_LD array 1', it passes through the first converging optical system 7' and then converges onto the fluorescent color wheel 8', and excites the green and red phosphors on the fluorescent color wheel 8' to emit light...

AI Technical Summary

Problems solved by technology

[0005] There has always been a big problem with this light source system. Red color shows color cast, because the fluorescence wavelength emitted by laser-excited red phosphor can range from about 550nm to about 700nm, with a span of up to 150nm, which will make red light (wavelength about 620nm or so) mixed with light of other colors (such as yellow light with a wavelength of about 570nm), so that the red light source cannot achieve the ideal red color, which seriously affects the color reproduction of the projector

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