Light source device based on nonlinear crystals and laser displayer

Abstract

The invention discloses a light source device based on nonlinear crystals and a laser displayer. The device comprises a first laser light source, a liquid crystal box, the first nonlinear crystal, the second nonlinear crystal and a second laser light source. The first laser light source is used for producing a laser light beam of a first color; the liquid crystal box is used for converting the laser light beam of the first color into a first polarized light beam or a second polarized light beam to be output or preventing the laser light beam from passing; the first nonlinear crystal is used for converting the first polarized light beam into a laser light beam of a second color; the second nonlinear crystal is used for converting the second polarized light beam into a laser light beam of a third color; the second laser light source is used for producing the laser light beam of the first color when the liquid crystal box prevents the laser light beam of the first color from passing. The light source device at least outputs the laser light beam of the first color, the laser light beam of the second color and the laser light beam of the third color. In this way, the laser light beams of three colors can be output through the two laser light sources and the two nonlinear crystals. The manufacturing difficulty caused by adopting a fluorescent color wheel is avoided, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of field display, in particular to a nonlinear crystal-based light source device and a laser display. Background technique [0002] Laser TV uses a semiconductor laser light source to generate continuous laser light with three wavelengths of red, green and blue as the light source of color laser TV, and controls the three-color laser scanning image through TV signals. [0003] Among them, the light source system of the laser TV generally adopts a monochromatic laser light source, and then excites and converts the monochromatic laser light source into the other two colors of laser light, so as to realize the continuous output of three-color laser light. This solution requires a fluorescent color wheel with multiple optical functions, and the output of three colors is controlled by the ratio and angle of coating different color phosphors on the fluorescent color mess. [0004] However, this method often requires precis...

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Problems solved by technology

[0004] However, this method often requires precise control of the coating position, gap and shape of the phosphor powder, which makes the production of the fluorescent color wheel more difficult; and when there are problems such as chromaticity and color temperature deviation, the only way to adjust it is by replacing the fluorescent color wheel. output of the light source, thereby increasing the cost

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