Optical engine for mini projector using laser light source

A laser light source and optical engine technology, applied in optics, optical components, instruments, etc., can solve problems such as difficulty in obtaining uniform light, inability to reduce, and reduce laser speckle characteristics, so as to weaken laser speckle and prevent interference Effect

Inactive Publication Date: 2010-07-28
SHANGHAI SANXIN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the existing beam shaper blocks the part beyond the area, the light efficiency is low, and it is difficult to obtain uniform light
[0005] In add

Method used

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  • Optical engine for mini projector using laser light source
  • Optical engine for mini projector using laser light source
  • Optical engine for mini projector using laser light source

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Embodiment Construction

[0022] In the following description, numerous technical details are set forth in order to provide the reader with a better understanding of the present application. However, those of ordinary skill in the art can understand that even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the claims of the present application can be realized.

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] The first embodiment of the present invention relates to an optical engine for a micro projector using a laser light source.

[0025] figure 1 It is a schematic diagram of the overall operation principle of a projector using a laser light source. The projector including the laser light source consists of: R li...

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Abstract

The invention relates to a portable mini projector and discloses an optical engine for a mini projector using a laser light source. In the optical engine, a plurality of small lens bodies which are suitable for the laser and have the diameter of 80 to 500 mu m are used on a beam shaper, so that beams are shaped more easily. The plurality of small lens bodies with different dimensions are combinedon the beam shaper, so that laser speckles are reduced. The shape of the small lens bodies is consistent with that of an effective area of an optical modulator preferably. The dimensions of the smalllens bodies are randomly distributed preferably, and the arrangement mode is irregular preferably. A diffuser is arranged at the front end of the beam shaper.

Description

technical field [0001] The invention relates to a portable micro-projector, in particular to a micro-projector which shapes the light emitted by the light source into a surface light source, forms an image through the effective area of ​​the light modulator, and enlarges and projects it through a projection lens. Background technique [0002] In order to commercialize a portable compact projector smaller than the palm of your hand or a projector that can be embedded in a notebook computer, it is necessary to develop a projector with a small size and low power consumption. To realize the miniaturization of the projector, it is necessary to simplify the structure of the optical system. [0003] In order to develop a projector with low power consumption, it is necessary to choose a high-quality light source with relatively low power consumption. For such a low-power projector, the most suitable light source is a laser or a light-emitting diode (Low Emitting Diode, "LED" for sh...

Claims

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Application Information

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IPC IPC(8): G02B27/09G03B21/20G03B21/14
Inventor 李东珍林伦辰权赫烈金城守
Owner SHANGHAI SANXIN TECH DEV
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