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Laser light source, wavelength conversion light source, combined light source and projection display device

A laser light source and wavelength conversion technology, which is applied in the field of light source, can solve the problems of poor light uniformity, inability to improve significantly, increase the number of laser reflections, etc.

Active Publication Date: 2016-08-31
APPOTRONICS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found through experiments that such uniform light effect is not good, and the outgoing light from the outlet of the square rod 14 still presents separated laser spots and cannot be mixed into a uniform surface distribution
Prolonging the length of the square rod 14 to increase the number of reflections of the laser in the square rod cannot significantly improve the

Method used

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  • Laser light source, wavelength conversion light source, combined light source and projection display device
  • Laser light source, wavelength conversion light source, combined light source and projection display device
  • Laser light source, wavelength conversion light source, combined light source and projection display device

Examples

Experimental program
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Effect test

Embodiment 1

[0030] image 3 It is a structural schematic diagram of Embodiment 1 of the laser light source of the present invention. The laser light source 300 includes a laser light source array for generating a collimated primary laser beam array 381 . Wherein the laser light source array is composed of a laser element array and a collimating lens array, the laser element array includes laser elements 41a, 41b and 41c, and the collimating lens array includes 42a, 42b and 42c, wherein each collimating lens corresponds to a laser element, The light emitting position of the laser element is located at the focal point of the corresponding collimating lens, and the light emitted by it is collimated after passing through the collimating lens.

[0031] In this embodiment, the laser element is a laser diode. In fact, the laser element may of course be other elements that emit laser light, which is not limited in the present invention. In addition, if the collimation degree of the laser beam e...

Embodiment 2

[0044] Figure 5 It is a structural schematic diagram of the laser light source of the second embodiment. Different from Embodiment 1, the laser light source in this embodiment also includes an angle distribution control element 45 located between the collimating optical element 44 and the integrator rod 46, which is used to converge or diverge the incident secondary laser beam to form a predetermined angle distributed.

[0045] In this embodiment, the angular distribution control element 45 is a fly-eye lens 45 including a microlens array, and each microlens can converge or diverge the incident secondary laser beam to form a predetermined angular distribution. The working principle of the microlens array is as follows: Image 6 shown. Image 6 In the above, the light on the left side of the fly-eye lens is the incident light, that is, the collimated secondary laser beam array. The incident light is focused and then diverged after passing through each microlens 451, and its...

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Abstract

A laser source, a wavelength conversion light source using the laser source, a light combining source, and a projecting and displaying apparatus. The laser light source (300) comprises a laser light source array, a focusing optical element (43), a collimating optical element (44), and an integrator rod (46). The laser light source array is used for generating a collimating primary laser beam array (381). After the primary laser beam array (381) sequentially passes through the focusing optical element (43) and the collimating optical element (44) located on a rear end, the primary laser beam array (381) forms a collimating secondary laser beam array (382). The distance of secondary laser beams in the secondary laser beam array (382) is less than the distance of primary laser beams of the primary laser beam array (381). The integrator rod (46) is used for receiving and homogenizing the secondary laser beam array (382). After the effect of the focusing optical element (43) and the collimating optical element (44), the cross section of the primary laser beam array (381) is compressed to form the secondary laser beam array (382). The divergence angle of the secondary laser beams is greater than the divergence angle of the primary laser beams. After the secondary laser beams pass through the integrator rod (46) on the rear end, surface distribution can be implemented on the secondary laser beams.

Description

technical field [0001] The invention relates to the field of light sources, in particular to a laser light source, a wavelength conversion light source using the laser light source, a combined light source and a projection display device. Background technique [0002] With the development of semiconductor technology, the advantages of solid-state lighting sources are becoming more and more obvious. As a new type of light source with high brightness and high collimation, laser light source is being gradually applied to projection, lighting and other fields. The etendue of the laser light source is small, and high-brightness light output can be obtained, but it also makes it more difficult to uniform the light. [0003] figure 1 It is a laser light source in the prior art that utilizes square rods for uniform light, wherein 11a-11c are laser diodes, 12a-12c are collimating lenses, 13 is a converging lens, and 14 is a rectangular square rod. The collimating lenses 12a-12c ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20G02B27/09G02B27/30G02B27/10F21V13/00F21V9/10F21V9/40
CPCG03B21/208G03B21/2013G03B21/2033
Inventor 胡飞
Owner APPOTRONICS CORP LTD