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A laser light source device, projection system and control method thereof

A laser light source, laser technology, applied in the field of projection, can solve the problems of reducing laser coherence, unable to effectively eliminate speckle, etc., to achieve the effect of reducing spatial coherence, reducing temporal and spatial coherence, and suppressing speckle

Active Publication Date: 2022-07-01
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current method of eliminating laser speckle is to add elements such as diffusers in the laser light path to reduce the coherence of the laser. Eliminate speckle

Method used

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  • A laser light source device, projection system and control method thereof
  • A laser light source device, projection system and control method thereof
  • A laser light source device, projection system and control method thereof

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Embodiment Construction

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] The laser light source device, the projection system and the control method thereof provided by the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] In a first aspect of the embodiments of the present invention, a laser light source device is provided, such as figure 1 As mentioned above, the laser light source device provided by the embod...

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Abstract

The invention discloses a laser light source device, a projection system and a control method thereof. Optical coupling components are used to couple a laser beam to a multi-mode fiber for transmission. The laser beam passing through the multi-mode fiber will produce random propagation time changes, thereby destroying the laser beam. temporal coherence. Then, the laser beam passing through the multimode fiber is re-incident to the electro-refractive index changing component, and by applying a control signal to the electro-refractive index changing component, the refractive index of the medium at the incident position of the laser beam is changed, so that the light spot when the laser exits is changed. Spatial phase differences are created at different locations, thereby reducing the spatial coherence of the laser light. The laser beam passing through the electro-refractive index changing part is incident on the homogenizing part, so that the laser beam can be further homogenized. It can be seen that the above-mentioned laser light source device provided by the embodiment of the present invention can reduce the temporal and spatial coherence of the laser light at the same time, and effectively suppress the speckle generated by the laser light.

Description

technical field [0001] The present invention relates to the technical field of projection, and in particular, to a laser light source device, a projection system and a control method thereof. Background technique [0002] Laser projection display technology, also known as laser projection technology or laser display technology, is a display technology with red, green and blue lasers as the light source, which can truly reproduce the rich and bright colors of the objective world and provide more shocking expressiveness. . Because the laser has the characteristics of good monochromaticity, high energy, and narrow bandwidth of the monochromatic laser, the laser display technology has a higher color gamut coverage than the traditional display technology, and achieves perfect color reproduction, allowing people to pass the display terminal. See the most real, most gorgeous world. [0003] However, it is precisely because of the strong coherence of laser light that when the cohe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20G02B27/48
CPCG03B21/2033G03B21/206G03B21/208G02B27/48
Inventor 郭汝海刘卫东
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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