Micro projector based on pure laser optics engine

Abstract

The invention discloses a micro projector based on pure laser optics engine, comprising a projection lens A, a heat dissipation copper plate A, a red laser light source A, a green laser light source A, a blue laser light source A, an X prism A, a white light reflector, a TIR (Total Internal Reflection) prism, and a DLP (Digital Light Processing) light modulator A. With a compact structure, the micro projector is reduced in volume; the pure three-color lasers are adopted and light transfer efficiency reduction possibly occurring due to the small volume is prevented, thereby effectively reducing light energy loss. Beside a radiator is together used by three-color lasers, a heat dissipation problem of a light supply device is successfully solved and practicability of an optical engine module is increased in the micro projector. Moreover, the optical engine part of the pure laser micro projector is changed, the lens especially for the non-spherical lens is reduced in use, and the volume and the cost are reduced, so that the price of the projector is approximate to the mass consumption level and the micro project is more likely to have a considerable market.

Description

technical field [0001] The invention relates to the technical field of digital micro-projection display, in particular to a micro-projector based on a pure laser optical engine. Background technique [0002] Micro projectors are also called pocket projectors and portable projectors. The miniature projector makes the traditional huge projector compact, portable, miniaturized, entertaining, and practical, making projection technology closer to life and entertainment. Driven by the strong demand of the majority of users, the pico projector technology has developed rapidly in recent years. DLP, LCOS and other products have launched portable handheld pico projector products (PICO), or projector models built into handheld mobile devices such as mobile phones. Group. Compared with traditional LCD and LCOS projectors, DLP projection products are favored by consumers because of their greater advantages in lumen brightness, video image display and contrast. [0003] For the existin...

AI Technical Summary

Problems solved by technology

However, due to the low luminous efficiency of the LED light source itself, the luminous flux is low

In addition, a collimating lens group needs to be installed at the rear end of the LED light source, and the collimating lens used is generally an aspherical lens, which is difficult to design and expensive

The system uses two beam-splitting lenses, which leads to large loss of light efficiency and low utilization rate of light energy, resulting in the luminous flux of the LED micro-projector not meeting the needs of users.

The production process of this type of LED micro-projector light machine is relatively complicated, expensive, and takes up a lot of space. The optical path structure is not compact enough, which increases the volume of the entire projector.

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