A two-color laser light source

A laser light source and red laser technology, applied in the field of projection display, can solve the problems of reducing speckle and reducing the quality of projection images, and achieve the effect of good damage and reducing speckle phenomenon

Active Publication Date: 2017-06-16
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Application Information

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Problems solved by technology

[0005] The invention provides a two-color laser light source, which consists of a fixed first diffusion part and a controlled rotating second diffusion part to form a speckle elimination system, which can simultaneously eliminate speckle for blue laser and red laser, effectively reducing speckle phenomenon , which solves the technical problem in the prior art that the quality of the projected image is reduced due to the speckle effect caused by the use of laser light sources

Method used

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  • A two-color laser light source
  • A two-color laser light source
  • A two-color laser light source

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Embodiment 1

[0031] Embodiment 1 of the present invention provides a two-color laser light source, such as figure 1 As shown, it includes a blue laser array 11 and a red laser array 12, which emit blue and red lasers respectively, and the fluorescent wheel 4 is coated with green phosphors on the surface. The green phosphors are excited by the blue laser to emit green fluorescence. Before entering the fluorescent wheel 4 and the light combining part 5, the blue laser and the red laser must be shaped by the beam shaping device 2. The beam shaping device 2 includes the first diffuser 31 of the speckle reducing system 3, wherein the first diffuser 31 is fixed and located in the beam shaping optical path of the blue laser and the red laser to diffuse the blue laser and the red laser. The blue laser is reflected to the fluorescent wheel through the light combining component 5, and reaches the light combining component 5 again through the transmission of the fluorescent wheel and the light path of ...

Embodiment 2

[0035] Embodiment 2 of the present invention provides a laser light source, such as figure 2 As shown, the blue laser array 11 for outputting blue laser light and the red laser array 12 for outputting red laser light are arranged vertically, and the light beams emitted by the vertically arranged arrays are also perpendicular to each other. This arrangement helps to reduce the volume occupied by the laser and at the same time facilitates the sharing of beam shaping devices.

[0036] Since the laser spot emitted by the laser may have uneven brightness and excessive beam area, the light transmittance of optical components is low, the fluorescence excitation efficiency is low, and the laser beam spread angle is greater than the light rod collection angle, resulting in low laser collection efficiency There are many problems that affect the brightness of the projection light source. Therefore, a series of beam shaping such as reflection and refraction of the laser are required to reduc...

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Abstract

The present invention disclosed a two -color laser light source, including blue laser and red laser, which emit blue laser and red laser respectively; fluorescent wheels are coated with green fluorescent powder on the surface, and green fluorescent powder is inspired by blue lasers to emit green fluorescent fluorescent.It also includes the dissipation spots system. The dissipation spots include: the first diffusion department, which is fixed in the beam plastic surgery of blue laser and red laser, which is used to diffuse blue laser and red laser;The proliferation department is controlled to rotate and is set in front of blue laser, red laser and green fluorescent incident light rods. It is used in sequence through blue laser and red laser and forming blue light and red light output.The two -color laser light source can effectively weaken the spots effect and improve the display quality of the projection image.

Description

Technical field [0001] The invention relates to the field of projection display, in particular to a two-color laser light source. Background technique [0002] Laser is a light source with high brightness, strong directivity and monochromatic coherent beam. Due to the many advantages of laser, it has been gradually used as a light source in the field of projection display technology in recent years. However, due to the high coherence of the laser, the speckle effect is inevitably generated. This phenomenon is particularly obvious not only in the scheme using pure laser as the light source, but also in the scheme of laser and fluorescence, and mixed light source of laser and LED. The so-called speckle refers to the light scattered by the coherent light source when irradiating a rough object. Because its wavelength is the same and the phase is constant, it will interfere in space. Some parts of the space will interfere constructively, and some will interfere. The final result is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20G02B27/48G02B27/09
CPCG02B27/48G02B5/0263G02B5/0278G02B5/0294G02B26/008G03B33/08H04N9/3114H04N9/3161H04N9/3164H04N9/3158G02B27/1006G02B27/143G03B21/2013G03B21/204G03B21/2066G03B21/208H04N9/3152G03B21/20
Inventor 田有良刘显荣李巍
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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