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Laser light source and laser projection equipment

A laser light source and laser technology, applied in the field of projection display, can solve the problems of limited effect and inability to effectively improve the display quality of projection images, and achieve the effects of improving the homogenization effect, reducing the speckle effect, and increasing the number

Active Publication Date: 2016-05-11
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the speckle dissipation effect of the diffuser in the prior art is related to the divergence angle and movement mode set by the diffuser itself. In practical applications, the effect is limited and the display quality of the projected image cannot be effectively improved.

Method used

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  • Laser light source and laser projection equipment
  • Laser light source and laser projection equipment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 of the present invention provides a laser light source, such as figure 1 As shown, the first embodiment discloses a two-color laser light source. The laser specifically includes a blue laser 11 and a red laser 12, which are vertically arranged to emit blue laser and red laser respectively, wherein the blue laser is used as the excitation light source. And, the fluorescent wheel 20, the substrate of the fluorescent wheel 20 is provided with green fluorescent powder, which is used to emit green fluorescent light when excited by the laser light, so as to form three primary colors with blue laser light and red laser light. Wherein, the speckle elimination device 30 is arranged in the transmission optical path after the combination of the red laser and the blue laser light, and the speckle elimination device 30 includes a first diffusion part 31 and a second diffusion part 32, and the two diffusion parts are arranged adjacent to each other. Such as figure 2 As...

Embodiment 2

[0070] Embodiment 2 of the present invention provides yet another two-color laser light source, such as Figure 6 As shown, it includes a blue laser group 11 and a red laser group 12, which are arranged side by side to emit blue laser light and red laser light respectively. The blue laser and the red laser pass through the telescope systems 13 and 14 to shape the beams, and then the blue laser is incident on the fluorescent wheel 20 after the beams are narrowed respectively, while the red laser is output to the light-combining component 40 alone. In the embodiment of the present invention, the fluorescent wheel 20 is a transmissive fluorescent wheel, including a fluorescent area coated with green phosphor powder, and a transmissive area for transmitting blue laser light, so that as the fluorescent wheel rotates, the green fluorescent and blue The color lasers are emitted through the back of the fluorescent wheel in turn, and are collimated by the collimating lens group on the ...

Embodiment 3

[0082] In the third embodiment of the present invention, another two-color laser light source is provided, such as Figure 8 As shown, a blue laser 11 and a red laser 12 are included, both of which are arranged side by side, and are condensed by beam condensing components 13 and 14 respectively. Among them, the blue laser is used as the excitation light source, incident to the fluorescent wheel 20, and the red laser is alone.

[0083] In the embodiment of the present invention, the speckle dissipating components include a first diffusion component 31 and a second diffusion component 32 .

[0084] In the embodiment of the present invention, the fluorescent wheel 20 is a reflective fluorescent wheel, including a fluorescent area and a transmissive area, and the fluorescent area is at least coated with green phosphor. A collimating lens group 22 is arranged on the front of the fluorescent wheel, and a blue light relay circuit 21 is arranged on the back.

[0085] When the blue l...

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Abstract

The invention discloses a laser light source. The laser light source comprises a blue laser device and a red laser device which respectively emit blue laser light and red laser light, and further comprises a fluorescence wheel which is excited to emit green fluorescence, wherein a first diffusion part and a second diffusion part are arranged on a transmission light path of the at least one color laser light, the first diffusion part and the second diffusion part are respectively driven to do motion, motion tracks are different, the space position scope with phase change increases when laser beams sequentially pass through the two diffusion parts, the probability that correlation degrees among phases after change are relatively low increases, the quantity of random phase patterns can be greatly improved, the eye integration effect is utilized to alleviate the speckle removal effect, so the relatively good speckle purpose is realized. The invention further discloses laser projection equipment equipped with the laser light source.

Description

[0001] This application claims the priority of the Chinese invention application 201511013799.9 filed on December 31, 2015 with the title of invention "a laser light source and laser projection equipment". technical field [0002] The invention relates to the field of projection display, in particular to a laser light source and laser projection equipment for projection. Background technique [0003] Laser is a light source with high brightness, strong directionality, and monochromatic coherent light beam. Due to its many advantages, it has been gradually used as a light source in the field of projection display technology in recent years. The high coherence of the laser also brings about the speckle effect in the laser projection display. The so-called speckle refers to the scattered light when the coherent light source irradiates a rough object. Interference occurs in some parts of the space, and some parts of the space interfere and construct, and some parts interfere and...

Claims

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Application Information

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IPC IPC(8): G03B21/20G02B27/09
CPCG02B27/0933G02B27/48G03B21/2013G03B21/2033G03B21/204G03B21/208
Inventor 田有良刘显荣
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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