Laser projector capable of eliminating speckles

A laser projector, laser light source technology, applied in optics, optical components, instruments, etc., can solve problems such as reduced reliability and complex structure

Inactive Publication Date: 2011-02-16
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The patent with the publication number CN1665285 discloses the method of eliminating speckle by using a vibrating mirror. The disadvantage of this patent is that the structure is complicated and the reliability is reduced.

Method used

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  • Laser projector capable of eliminating speckles
  • Laser projector capable of eliminating speckles
  • Laser projector capable of eliminating speckles

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Embodiment Construction

[0012] figure 1 A schematic diagram of laser speckle formation is illustrated. When the laser is irradiated on the surface 104 of the rough screen, taking similar beams 102 and 103 as an example, after being diffusely reflected by the screen, the beams 102 and 103 interfere at point A in front of the screen. If constructive interference occurs, point A appears as a bright spot, and if destructive interference occurs, point A appears as a dark spot. Therefore, if the laser source of the projector is directly used for projection display without processing, irregularly distributed speckles will appear on the screen.

[0013] refer to figure 2 , the laser projector 10 of the present invention includes a laser light source 20 , a projection lens 30 and a vibration module 40 . It can be understood that, in order to describe the present invention more concisely, the present invention only illustrates elements related to the present invention. The vibrating module 40 is used to d...

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Abstract

The invention provides a laser projector which comprises a shell, a laser source arranged in the shell and a vibration module for driving the laser source to vibrate with specific amplitude. In the invention, speckles can be eliminated by means of vibration of the laser source in the projector, and the projected image quality of the projector is ensured.

Description

technical field [0001] The invention relates to a laser projector, in particular to a laser projector capable of eliminating speckles. Background technique [0002] Because laser projectors use laser light as a light source, they have the advantages of long life and low energy consumption. Because the laser is a kind of coherent light, if the laser is directly used for projection display without any processing, the screen will display a speckle pattern caused by laser interference with uneven brightness distribution, which is the so-called speckle. . [0003] The patent with the publication number CN1665285 discloses the method of eliminating speckle by using a vibrating mirror. The disadvantage of this patent is that the structure is complicated and the reliability is reduced. Contents of the invention [0004] In view of this, it is necessary to provide a laser projector capable of eliminating speckles. [0005] The invention provides a laser projector, which includes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/00G03B21/14G02B27/48
Inventor 庄品洋
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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