Light source shaping method and structure used for projection

Abstract

The invention provides a laser light source shaping method and device and a laser projection device. The light source shaping device comprises one or more reflecting mirror units used for regulating the transmission direction of a light source. Each reflecting mirror unit comprises one or more sets of reflecting mirrors arranged on the same plane, intervals exist between the reflecting mirrors of each set of reflecting mirrors, each reflecting mirror is used for reflecting a plurality of light beams, and the reflecting mirror units shape the light source and output a combined light beam consistent in direction. The multiple reflecting units can achieve multiple times of shaping on the light beams and can regulate the size of light spots to the maximum extent. The optical quality of the light beams is obviously improved by means of the configuration.

Description

technical field [0001] The invention relates to the field of optoelectronics, in particular to a light source shaping structure, method and laser display device. Background technique [0002] At present, projection display products are developing rapidly, and the brightness is constantly improving. Most of the light sources used in projection products are LEDs of three primary colors. Due to the poor spatial beam quality of the LED output light and the large optical expansion, it is difficult to achieve light output. Therefore, the laser excitation phosphor solution came into being. The laser power usually used for excitation is above tens of watts, which is realized by a low-power blue laser array. [0003] The mainstream laser light source projectors generally use a laser beam to excite a phosphor wheel to generate the required display light source. When the brightness is high, the required laser power may be as high as tens of watts, or even more than 100 watts. . Suc...

AI Technical Summary

Problems solved by technology

As mentioned above, the single-array lasers are used to deflect and combine the beams as a whole. It is also possible to use reflectors to cooperate with multi-array lasers to achieve beam shaping to a certain array of laser beams. For example, two sets of laser arrays are vertically placed. Intersect with another group of parallel beams to form a beam, but these processing methods have a limited reduction in the interval between beams. Due to the influence of the mirror arrangement, the spot size cannot be further compressed, that is, the spot size cannot be flexibly controlled according to needs.

[0006] In addition, whether it is a single-array or multi-array laser, when using reflectors for beam shaping, each laser beam is equipped with an independent reflector to achieve beam shaping, or each group of lasers in the laser array is configured with an independent reflector to achieve beam shaping. This kind of configuration structure, in the process of deflecting the laser beam transmission direction, it is impossible to fully meet the design requirements or it is difficult to meet the complete accuracy requirements, so the spot after shaping is composed of many small beams with slight deviations in multiple transmission directions , but not completely in the same direction, which greatly reduces the optical quality of the combined beam

Due to the widespread use of the above-mentioned existing structures, optimization measures such as improving mechanical precision are generally adopted to reduce deviations. So far, there is no data showing that there is a design that breaks through this structure, especially the structure of the improved mirror unit.

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