The subject matter herein generally relates to light sources, and more particularly to a stationary light source for use in a projector.
Laser projectors are becoming commonly used for their high contrast, high brightness, and high color saturation. Generally, Laser projectors have a complicated structure.
Implementations of the present disclosure will now be described, by way of example only, with reference to the attached FIGURES.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different FIGURES to indicate corresponding or analogous elements. Additionally, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein.
Several definitions that apply throughout this disclosure will now be presented.
The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series and the like.
The light source group 10 includes a laser source 11, a scattering mirror 12, and a fluorescent scattering mirror 13. The laser source 11 includes at least one laser generator 110 for generating a laser beam b. The scattering mirror 12 and the fluorescent scattering mirror 13 are located within the light combining device 20. In one embodiment, the laser source 11 includes four laser generators 110 for generating high-intensity laser beams b. The laser beam b generated by the laser source 11 is split into two beams, one beam projected to the scattering mirror 12 and generating a first colored light, and a second beam projected to the fluorescent scattering mirror 13 and generating a second colored light.
A lens group 14 is located at a front end of the laser source 11. The lens group 14 includes concave and convex lenses. The lens group 14 focuses the laser beam b emitted by the laser source 11. In one embodiment, the laser beam b is blue, the first colored light is blue light B, and the second colored light is yellow light Y.
An optical path of the first colored light is scattered by the scattering mirror 12 located in front of the light combining device 20 to guide the light combining device 20 after passing through the light combining device 20 located at a front end of the laser source 11.
A surface of the fluorescent scattering mirror 13 receiving light comprises an illumination zone configured to receive illumination from the laser beam b. In one embodiment, the illumination zone includes a fluorescent layer. The fluorescent scattering mirror 13 may be a glass panel infused with fluorescent powder, or may be made of fluorescent-infused crystal. The fluorescent layer illuminated by the laser beam b is excited to generate the second colored light Y. A light path of the second colored light Y is reflected by the light combining device 20 to guide the light guide assembly 30 after being reflected by an illumination surface of the fluorescent scattering mirror 13 to the light combining device 20.
The light combining device 20 is a semielliptical hollow reflecting mirror. The scattering mirror 12 and the fluorescent scattering mirror 13 are adjacent to a focal point of the light combining device 20. The light combining device 20 receives the blue light B scattered by the scattering light 12 and the yellow light Y generated by the fluorescent scattering mirror 13. The light combining device 20 combines and focuses the light to form a combined light beam and projects the combined light beam to the light guide assembly 30.
The combined light beam formed from the blue light B and the yellow light Y has an enhanced brightness. Because the two colors of light (blue, yellow) generated by the light source group 10 have the high-intensity characteristics of the laser source 11, brightness of projection images of the projector is increased, and a color temperature of the projection images can be adjusted by adjusting a ratio of the laser beams b projected to the scattering mirror 12 and the fluorescent scattering mirror 13, thereby increasing portability of the projector.
The embodiments shown and described above are only examples. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including, the full extent established by the broad general meaning of the terms used in the claims.
Number | Date | Country | Kind |
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201811037976.0 | Sep 2018 | CN | national |