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laser projection equipment

A technology of laser projection and equipment, which is applied in optics, optical components, instruments, etc., can solve the problems of limited speckle dissipation effect, uniform spectral distribution, and difficulty in ensuring accuracy, and achieves improved speckle problems, simple system structure, and uniform distribution wide effect

Active Publication Date: 2020-05-19
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The speckle dissipation effect of this method is limited by the etendue of the system. Without affecting the collection efficiency, the speckle dissipation effect is relatively limited.
[0006] 3. Spacing layout of laser chips: By designing the spacing distance between laser chips, the regions with close and sparse spacing have different temperatures, thereby broadening the spectral width of the laser, but the simple sparse arrangement cannot make the spectral distribution uniform. Precise calculation is required to obtain the interval distribution curve of the laser chip, determine the interval between each chip, and then grow the chip according to this interval
This method is technically difficult, expensive, and difficult to guarantee accuracy.
[0007] In addition to the above methods, lasers with a wavelength deviation of 2-5nm can also be prepared through the latest production technology. When making a laser module, lasers with different wavelengths can be processed into a laser module. The disadvantage of the method is that it is necessary to control the manufacture of the laser module separately, and the complexity of the system increases

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0021] Such as figure 1 As shown, the laser projection device of this embodiment includes a red laser light source 1 , a heat conduction device 4 , and a first liquid cooling system 6 . The laser projection device may be a laser projector with a projection function, a laser TV, and the like.

[0022] Wherein, red laser light source 1 is divided into first red laser light source group 11 and second red laser light source group 12; The group 11 and the second red laser light source group 12 are connected through the heat conduction device 4 , so that the temperature difference between the two red laser light source groups 11 and 12 is above 5°C. Among them, the contact heat exchange between the first red laser light source group 11 and the first liquid cooling system 6 can be realized through a heat conduction medium, that is, a heat conduction pad or heat conduction silicon can be arranged between the contact surfaces of the two. Grease and other heat-conducting media can mak...

no. 2 example

[0045] refer to figure 2 The difference between the laser projection device of this embodiment and the first embodiment is that the laser projection device of this embodiment also adds a pressurized liquid replenisher 65 to the first liquid cooling system 6 to provide 6 to add coolant.

[0046] image 3 A preferred structural form of the pressurized liquid replenisher 65 is illustrated, and the pressurized liquid replenisher 65 includes a housing 651 , a piston 652 and an elastic member 653 . The interior of the casing 651 is hollow; the piston 652 is adapted to the inner section of the casing 651, and is slidably arranged in the casing 651, and the interior of the casing 651 is divided into a gas chamber 656 and a liquid storage chamber 657, the gas chamber 656 is filled with gas, and the liquid storage chamber 657 Coolant is stored inside; the elastic member 653 is located in the gas chamber 656, and the two ends are respectively connected to the piston 652 and the wall o...

no. 3 example

[0052] refer to Figure 5 The difference between the laser projection device of this embodiment and the first embodiment is that in this embodiment, the laser projection device also includes a blue laser light source 2 and a second liquid cooling system 7 for dissipating heat from the blue laser light source 2 , the operation of the second liquid cooling system 7 and the first liquid cooling system 6 are independent of each other.

[0053] The blue laser light source 2 is composed of one or more blue laser modules; each blue laser module includes a plurality of blue lasers arranged in an array.

[0054] The composition and structure of the second liquid cooling system 7 is the same as that of the first liquid cooling system 6, and the second liquid cooling system 7 includes a second liquid cooling head 71, a second heat exchanger 72 and a second heat exchanger 72 connected by pipes to form a circulation system. The second circulation pump 73 and the second heat exchanger 72 i...

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Abstract

The invention provides laser projection equipment which comprises red laser light sources, a heat conduction device and a first liquid cooling heat dissipation system. The red laser light sources are at least divided into a first red laser light source group and a second red laser light source group; the first red laser light source group and the first liquid cooling heat dissipation system are in contact heat exchange with each other so that heat can be dissipated; the first red laser light source group is connected with the second red laser light source group by the heat conduction device, and the temperature difference between the two red laser light source groups ranges from 5 DEG C to 30 DEG C; the first liquid cooling heat dissipation system is provided with a circulating channel for circulating cooling liquid, and heat of the red laser light sources can be absorbed by the cooling liquid and can be transmitted into external air by the cooling liquid. The laser projection equipment has the advantages that the heat of the light sources can be dissipated by the liquid cooling heat dissipation system and the heat conduction device, and the problem of speckle can be solved.

Description

technical field [0001] The invention relates to the field of projection equipment, in particular to a laser projection equipment. Background technique [0002] Laser display is considered to be the fourth generation of display technology after black and white display, color display and high-definition digital display, and has very important research value. At present, laser light sources have been applied in high-end projectors, but due to the strong coherence of lasers, when lasers are used as display light sources, speckles will be generated on the screen (when coherent light sources irradiate rough objects, after scattering The light in the space interferes in space, some parts of the space interfere constructively, and some parts interfere destructively, and the final result is granular light and dark spots on the screen, which are called speckles). Speckle seriously affects the clarity of the picture and is a major problem in laser display, especially for the long-wave...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/16G03B21/20G02B27/48
CPCG02B27/48G03B21/16G03B21/2033
Inventor 邢哲
Owner HISENSE VISUAL TECH CO LTD