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Laser light source structure of high brightness projector

A laser light source and projector technology, applied in optics, instruments, projection devices, etc., can solve the problems affecting the output brightness of the projection machine and the luminous efficiency of phosphor powder, etc., and achieve easy mass production, simple structure, and improved output brightness Effect

Pending Publication Date: 2019-12-06
重庆融豪太视科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reducing the size of the beam means reducing the beam size of the excitation light on the phosphor, and the too small laser beam brings about the concentration of heat energy, and the increase in temperature greatly affects the luminous efficiency of the phosphor powder, thereby affecting the output brightness of the projection machine

Method used

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  • Laser light source structure of high brightness projector
  • Laser light source structure of high brightness projector
  • Laser light source structure of high brightness projector

Examples

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Effect test

example 1

[0021] In this embodiment, this structure is used in a DLP laser phosphor projector with 1080P resolution, the aspect ratio of the imaging chip is 16:9, and the incident plane of the integral uniform light element 9 is also approximately with an aspect ratio of 16: 9, by adjusting the parameters of the lens group, the spot area of ​​the green band beam 4 on the phosphor wheel 7 is increased, and the incident plane area of ​​the integral uniform light element 9 is fully utilized, so that the laser beam 2 is on the phosphor wheel 7 The aspect ratio of the light spot on the surface is approximately 16:9, and the aspect ratio of the light spot size of the light receiving plane of the integral uniform light element 9 is still 16:9, which effectively alleviates the heat dissipation.

example 2

[0023] In this embodiment, the 3LCD projector with XGA resolution as the display chip is taken as an example. The aspect ratio of the XGA chip is 4:3. Since the conventional polarization conversion system suitable for 3LCD will double the optical expansion of the beam in one direction, the laser When the beam output by the fluorescent light source has the same angle on the x and y planes, the most suitable aspect ratio is 2:3. Such as image 3 As shown, using the curved reflector 13 and the cylindrical lens 15 , it is still possible to realize light spots with different aspect ratios on the phosphor wheel 7 . In this embodiment, the aspect ratio of the laser spot size is 2:3, the aspect ratio of the spot size on the light emitting surface of the phosphor wheel 7 is 3:2, and the fluorescent light 8 passes through the second lens group 10 and the two-way After the color mirror 5 is combined with the red and blue band light beam 6 transmitted from the dichroic mirror 5, the comb...

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PUM

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Abstract

The invention relates to the field of laser light sources, and particularly relates to a laser light source structure of a high brightness projector. The laser light source structure comprises a laser. A first lens group is arranged in the laser beam emergent direction of the laser. The laser light source structure is also provided with a dichroic mirror. A second lens group and a phosphor wheel are sequentially arranged below the dichroic mirror. A third lens group and an integrated light leveling element are sequentially arranged above the dichroic mirror. The laser beam emitted by the laseris irradiated onto the dichroic mirror through the first lens group. The green band beam in the laser beam is reflected by the dichroic mirror and then irradiated onto the phosphor wheel to be converted into fluorescence through the second lens group. The fluorescence passes through the second lens group, the dichroic mirror and the third lens group in turn to be imaged on the light incident plane of the integrated light leveling element so that the light spot of the light receiving plane of the integrated light leveling element matches the rectangular shape corresponding to the display chipand the heat energy is dispersed, the influence of temperature on the luminous efficiency of fluorescent powder is greatly reduced and the output brightness of the projector is improved.

Description

technical field [0001] The invention relates to the field of laser light sources, in particular to a laser light source structure of a high-brightness projector. Background technique [0002] Laser phosphor projection is the development trend of the projection industry. The key link in laser phosphor projection - the excited light of the phosphor is affected by the temperature of the phosphor itself. During the excitation process of the phosphor powder, the laser energy is very concentrated, and the luminous point generates a high temperature of nearly 100 to 200 degrees Celsius. If the heat dissipation is not handled well, the luminous efficiency of the phosphor powder will be greatly affected, thereby affecting the output of the projector. [0003] At present, the laser spots of laser phosphors are mostly circular or square. The light emitted by this light-emitting surface still retains part of the surface characteristics of the light-emitting surface when it is collected ...

Claims

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Application Information

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IPC IPC(8): G03B21/20
CPCG03B21/204G03B21/208
Inventor 闫国枫杨新生
Owner 重庆融豪太视科技有限公司