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Optical engine for micro projector

A technology for optical engines and projectors, applied in optics, optical components, lenses, etc., can solve the problems of rising light efficiency and power consumption, optical engine heating, etc., and achieve the effect of reducing the effect of laser speckle

Inactive Publication Date: 2010-09-08
SHANGHAI SANXIN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The existing optical engine structure needs to filter out quite a lot of light in order to achieve linear polarization, and the filtered light will gradually be converted into heat energy, which will cause the heating problem of the optical engine, and there will also be an increase in power consumption due to low light efficiency The problem

Method used

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  • Optical engine for micro projector
  • Optical engine for micro projector
  • Optical engine for micro projector

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Embodiment Construction

[0029] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0031] An important innovation of the present invention is to separate the light emitted by the light source into two optical paths with different polarization modes, and then combine the two optical paths into one after optical modulation. For comparison, a technical solution that does not use this innovation is first described here. The technic...

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Abstract

The invention relates to a portable micro projector, and discloses an optical engine for the micro projector. In the optical engine, the light from a light source is divided into two light paths in different polarization modes, and the two light paths are combined into one path after light modulation respectively, so the original filtered polarized light can be fully utilized to improve the efficiency of the light source and reduce the power consumption and the heat productivity of the optical engine. As for a three-color laser light source, only the different polarized light of green laser is divided. As for an LED light source, the light from three light sources is combined into one path and then is divided by using a polarized light element.

Description

technical field [0001] The present invention relates to a portable micro-projector, in particular to a micro-projector including an optical engine capable of reusing originally unnecessary polarized light in light emitted from a light source. Background technique [0002] In order to commercialize a portable pico projector that is smaller than the palm of your hand or a projector that can be installed in a notebook, it is necessary to develop a projector that is small in size and low in power consumption. Miniaturization of projectors requires the use of small and high-density light sources. [0003] If a portable micro-projector is to be suitable for a mobile phone, it should be battery-driven. For this reason, a high-efficiency light source with relatively low power consumption will be used. The most suitable light source for this type of low power consumption miniature projector is a laser light source or a light emitting diode (Low Emitting Diode, referred to as “LED”) ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14G02B27/28G02B3/10
CPCG03B21/14G03B21/2073
Inventor 李东珍权赫烈金城守
Owner SHANGHAI SANXIN TECH DEV