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A three-color laser light source with a composite color wheel

A laser light source and composite color technology, applied in optics, optical components, instruments, etc., can solve the problem that the speckle effect cannot meet the display requirements

Active Publication Date: 2020-10-23
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a three-color laser light source with a composite color wheel, which is used to solve the problem that the speckle elimination effect achieved in the three-color laser display in the prior art still cannot meet the display requirements

Method used

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  • A three-color laser light source with a composite color wheel
  • A three-color laser light source with a composite color wheel
  • A three-color laser light source with a composite color wheel

Examples

Experimental program
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Effect test

Embodiment 1

[0026] combined with figure 1 As shown, a three-color laser light source with a composite color wheel includes a driving power supply 10, a laser group connected to the driving power supply 10, and a telescopic assembly 30 arranged behind the laser group, and the laser group includes 3 lasers and Arranged in a "C" shape, a light-combining assembly is arranged in the middle of the laser group; behind the telescopic assembly 30, a diffusion assembly 40, a light-condensing assembly 50, a composite color wheel 60 and a light rod 70 are arranged in sequence.

[0027] The laser group includes that the first laser 21 is a red laser, the second laser 22 is a green laser, and the third laser is a blue laser.

[0028] The drive power supply 10 sends out a signal to turn on the first laser 21, the second laser 22, and the third laser 23 in time-sharing, and the emitted red, green, and blue laser beams are synthesized into white light by the light-combining assembly 24, and then pass thro...

Embodiment 2

[0039] On the basis of Example 1, as figure 1 As shown, this embodiment provides a composite color wheel and a three-color laser light source. In this embodiment, the composite color wheel 60 adopts a new technical solution, and other technical solutions of the three-color laser light source are the same as those in Embodiment 1.

[0040] Such as figure 2 As shown, the composite color wheel 60 includes a first excitation region R1 , a second excitation region G1 , a first diffusion region R2 , a second diffusion region G2 and a third diffusion region B.

[0041] The technical solutions of the first diffusion region R2 , the second diffusion region G2 and the third diffusion region B are the same as those in the first embodiment, while the first excitation region R1 and the second excitation region G1 are different from those in the first embodiment.

[0042] Such as Figure 4Shown is a schematic cross-sectional structure diagram of the first excitation region R1 and the sec...

Embodiment 3

[0049] On the basis of Example 1, such as figure 1 As shown, this embodiment provides a composite color wheel and a three-color laser light source. In this embodiment, the composite color wheel 60 and the third laser light source 23 adopt a new technical solution, while other technical solutions of the three-color laser light source are the same as Embodiment 1 is the same.

[0050] Such as Figure 6 As shown, the third laser light source 23 includes a blue laser 231 and an ultraviolet laser 232 .

[0051] The blue laser 231 emits blue light with a wavelength of 455nm or 445nm, and the ultraviolet laser 232 emits ultraviolet light with a wavelength less than 400nm.

[0052] Such as Figure 5 As shown, the composite color wheel 60 includes a first excitation region R1 , a second excitation region G1 , a third excitation region B1 , a first diffusion region R2 , a second diffusion region G2 and a third diffusion region B2 .

[0053] Such as image 3 In the cross-sectional s...

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Abstract

The invention discloses a three-color laser light source with a composite color wheel, which comprises a driving power supply, a laser group connected with the driving power supply and a telescopic assembly arranged behind the laser group, and is characterized in that the laser group includes three lasers which are arranged in a C shape, and the middle of the laser group is provided with a light combining assembly; a diffusion assembly, a condensation assembly, a composite color wheel and a light bar are sequentially arranged behind the telescopic assembly. The time-sharing light combining characteristic of a DLP system is utilized to realize mixed light formed by three-color laser light and light emitted by fluorescent powder, and the fluorescent light is incoherent light, so that the speckle contrast can be effectively reduced by adding a certain proportion of fluorescent powder into the system for emitting light, and the problem of difficult speckle elimination in three-color laserdisplay is effectively solved.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a three-color laser light source with a composite color wheel. Background technique [0002] As a newly developed projection technology, laser projection uses a diode laser as a light source, and the light is projected on the light modulation chip (DMD, LCD, LCOS, etc.) after being homogenized by the lighting system, and then imaged on the image surface through the projection lens. Among them, the high coherence of the laser causes the speckle effect in the laser projection display. Speckle refers to that when a coherent light source illuminates a rough object, the scattered light is generated in space due to the constant phase difference, the same light wave frequency, and the same vibration direction. Interference, some parts interfere constructively, and some parts interfere destructively. The final result is that there are bright and dark spots on the screen, that is, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20G02B27/48
CPCG02B27/48G03B21/2013G03B21/204
Inventor 姜银磊张金旺梁其鹏
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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