a mixed light source

Abstract

A hybrid light source, characterized in that it includes: a laser light source, used to generate a first laser beam and a second laser beam, the linear polarization directions of the first laser beam and the second laser beam are perpendicular to each other; a rotating wheel, rotatable Placed on the path of the first laser beam and the second laser beam, the wheel has a reflection area and a penetration area, the reflection area is used to reflect the first laser beam and the second laser beam, and the penetration area can be used for the first laser beam and the second laser beam, thereby splitting the first laser beam into the first beam and the first excitation beam, splitting the second laser beam into the second beam and the second laser beam, and combining the first beam and the second beam into the first projection The light beam is guided to a projecting direction; a polarizing beam splitter is arranged on the paths of the first excitation light beam and the second excitation light beam, used to reflect the first excitation light beam and guide the first phosphor, and used for the second excitation light beam to pass through penetrating and directed to the second phosphor.

Description

technical field [0001] The invention relates to a projection light source. Background technique [0002] A projector is a device that projects different colors of colored light to a display device to display images through an optical path system composed of a light source, a filter, a phosphor wheel (Phosphor Wheel, PW), and a beam splitter. [0003] Different light sources or different optical path system designs will not only affect the volume and cost of the projector. More directly, it will also affect the brightness and color performance of the final displayed image. [0004] In terms of light source, laser diode light source (Laser Diode) has the advantages of high brightness, long life and minimal heat generation. Therefore, it is the first choice for various light sources in terms of product life, image brightness and color performance. However, in order to obtain a light source structure with a wide color gamut, the cost of a projector using laser diodes of three...

AI Technical Summary

Problems solved by technology

However, in order to obtain a light source structure with a wide color gamut, the cost of projectors using laser diodes of three primary colors (red, green, and blue) as light sources is extremely high, and the market acceptance is not high.

It can be seen that the balance between image performance and cost issues is a lack that needs to be improved.

[0005] In addition, because the laser is linearly polarized light, there is a problem of speckle, which affects the projection effect, especially for red lasers, where the problem of speckle is particularly serious. To solve the above problems, there is currently a solution for combining laser beams and LED beams to resolve speckles. But its optical path design is complex

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