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A kind of de-speckled mixed light source

A technology of mixing light sources and light sources, applied in the field of projection light sources, can solve the problems of low reception, complex optical path design, high cost, etc., and achieve the effect of improving light intensity and simplifying the optical path structure.

Active Publication Date: 2022-07-22
福建省锐驰物联网股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain a wide color gamut light source structure, the cost of projectors using laser diodes of three primary colors (red, green and blue) as light sources is extremely high, and the market acceptance is not high.
It can be seen that the balance between image performance and cost issues is a lack that needs to be improved.
[0005] In addition, because the laser is linearly polarized light, there is a problem of speckle, which affects the projection effect, especially for red lasers, where the problem of speckle is particularly serious. To solve the above problems, there is currently a solution for combining laser beams and LED beams to resolve speckles. But its optical path design is complex
[0006] The light combination of the existing laser beam and LED beam is accomplished through an optical filter, which reflects the laser beam and allows the LED beam to penetrate, thereby realizing light combination. Taking red light as an example, the wavelength range of the red LED beam is It is 590-638nm, the wavelength range of the red laser beam is 633-645nm, the light passing through the wavelength greater than 620nm will be reflected by the filter, and the rest will pass through the filter, so the red LED beam with a wavelength above 620nm will be reflected , which means that LED beams with a wavelength of 620-638nm cannot participate in light synthesis, which will lose a lot of LED beams. Similarly, the combination of green light and blue light will also lose quite a lot of LED beams

Method used

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  • A kind of de-speckled mixed light source
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  • A kind of de-speckled mixed light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1, refer to figure 1 and figure 2 As shown, a mixed light source for de-speckling includes: a laser light source 1 , a de-speckling light source, a runner 2 , a light guide component, a second filter F2 , and a fourth collimating mirror 6 .

[0041] The laser light source 1 can generate a blue laser beam B1 and a red laser beam R1 that do not work at the same time, and the despeckling light source includes a blue LED light source 7 and a red LED light source 5 for generating nonlinearly polarized blue despeckling beam B2 and red De-speckling beam R2, third collimating mirrors 71, 51 and relay lenses 42, 41 are arranged on the light-emitting sides of the blue LED light source 7 and red LED light source 5 in sequence, and the second filter F2 is arranged on the blue de-speckling beam On the path between B2 and the red de-spotting beam R2, the blue de-spotting beam B2 can be reflected by the second filter F2 and then go to the runner 2, and the red de-spotting...

Embodiment 2

[0053] Embodiment 2, refer to Figure 4 and Figure 5 As shown, a hybrid light source for de-speckling includes: a laser light source 1, a de-speckling light source, a rotating wheel 2, an excited LED light source 7, a light guide component, a second filter F2, and a fourth collimating mirror 6.

[0054] The laser light source 1 can generate a blue laser beam B1 and a red laser beam R1 that do not work at the same time, and the de-speckling light source includes a red LED light source 5 for generating a non-linearly polarized red de-speckling beam R2. The light-emitting sides of the excited LED light source 7 and the red LED light source 5 are sequentially provided with third collimating mirrors 71, 51 and relay mirrors 42, 41, and the second filter F2 is arranged on the path of the red de-speckling beam R2, and the red The de-spotting beam R2 penetrates the second filter F2 and then goes to the runner.

[0055] The wheel 2 is rotatably arranged on the path of the blue laser...

Embodiment 3

[0063] Embodiment 3, refer to Figure 7 and Figure 8 As shown, a mixed light source for de-speckling includes: a laser light source 1 , a de-speckling light source, a runner 2 , a light guide component, a second filter F2 , a third filter F3 , and a fourth collimating mirror 6 .

[0064] The laser light source 1 can generate blue laser beam B1, red laser beam R1 and green laser beam G1 that do not work at the same time. Linearly polarized blue de-spotting beam B2, red de-spotting beam R2 and green de-spotting beam G2, the light-emitting sides of blue LED light source 7, red LED light source 5 and green LED light source 8 are sequentially provided with a third collimating mirror 71, 51, 81 and relay lenses 42, 41, 43, the second filter F2 and the third filter F3 are arranged on the paths of the blue de-spotting beam B2, the red de-spotting beam R2, and the green de-spotting beam G2, The blue de-speckling light beam B2 can be reflected by the second filter F2 and pass through...

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Abstract

A de-speckling hybrid light source, the hybrid light source comprises a laser light source for generating a laser beam; a de-speckling light source for generating a non-linearly polarized de-speckling beam; a rotating wheel, rotatably arranged between the laser beam and the de-speckling beam On the path of the runner, the runner has a light combining area. The light combining area can reflect the laser beam and guide it to a projection direction. The light combining area can penetrate the de-spotting beam and guide it to the projection direction. The color of the de-spotting beam and the laser beam is the same for synthesis. The first projection beam.

Description

technical field [0001] The present invention relates to a projection light source. Background technique [0002] Projector is a device that projects color light of different colors to a display device to display images through an optical path system composed of optical elements such as a light source, a filter, a Phosphor Wheel (PW), and a beam splitter. [0003] Different light sources or different optical path system designs will not only affect the size and cost of the projector. More directly, it will also affect the brightness and color performance of the final displayed image. [0004] In terms of light source, laser diode light source (Laser Diode) has the advantages of high brightness, long life and minimal heat generation. Therefore, it is the first choice for various light sources in terms of product life, image brightness and color performance. However, in order to obtain a light source structure with a wide color gamut, the cost of a projector using laser diod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20
CPCG03B21/2066G03B21/2013
Inventor 吕素萍苏文露孔建平
Owner 福建省锐驰物联网股份有限公司