A laser light source system and display device

A laser light source and laser technology, applied in laser devices, semiconductor laser devices, optics, etc., can solve problems such as high cost and complex structure, and achieve the effects of low cost, reduced coherence, and suppressed speckle

Active Publication Date: 2019-08-20
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned method is to add a speckle-dissipating device outside the laser, and the structure is complicated, which leads to higher cost

Method used

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  • A laser light source system and display device
  • A laser light source system and display device
  • A laser light source system and display device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] An embodiment of the present invention provides a laser light source system structure, Figure 3a An exemplary structural block diagram of a laser light source system applicable to the embodiment of the present invention is shown. Such as Figure 3a As shown, it includes: a laser 301 , a heat sink 302 and a homogenizer 303 .

[0068] Such as Figure 3a As shown, the laser 301 includes N laser chips, N is an integer greater than or equal to 1; N laser chips are arranged on the heat sink 302, and the thermal conductivity of at least two laser chips in the heat sink 302 is different; The laser beams emitted by the N laser chips are incident on the homogenizer 303 .

[0069] The emission color of the laser 301 is not limited here, and may be one or any combination of a red laser, a green laser, and a blue laser. The number of heat sinks 302 is also not limited, and may be one or more heat sinks. The material of the heat sink 302 can be copper or aluminum. Doping differ...

Embodiment 2

[0076] Taking the number of heat sinks 302 as an example below, the structure of the laser in the embodiment of the present invention will be described in detail.

[0077] In this embodiment, the number of heat sink 302 is one, and the heat sink 302 can be divided into N regions, wherein at least two of the N regions have different thermal conductivity, and one laser chip is arranged in one region of the heat sink 302 . By encapsulating the laser chip on different parts of the heat sink, due to the difference in thermal conductivity between different parts, there is a temperature difference between the laser chips, and a broadband visible light output is generated to reduce laser coherence.

[0078] In order to generate a large temperature difference among the laser chips, preferably, according to the arrangement sequence of the N regions of the heat sink, the thermal conductivity of the N regions increases linearly or decreases linearly.

[0079] Figure 4a A schematic diag...

Embodiment 3

[0089] Taking the number of heat sinks 302 as N as an example, the laser structure of the embodiment of the present invention will be described in detail below.

[0090] In the embodiment of the present invention, the number of heat sinks 302 is N, at least two of the N heat sinks have different thermal conductivities, and one laser chip is arranged on one heat sink. By packaging N laser chips on N heat sinks, due to the difference in thermal conductivity of the N heat sinks, there is a temperature difference between the laser chips, and a broadband visible light output is generated to reduce laser coherence.

[0091] In order to generate a large temperature difference among the laser chips, preferably, according to the arrangement sequence of the N heat sinks, the thermal conductivity of the N heat sinks increases linearly or decreases linearly.

[0092] Figure 5a A schematic diagram of a front view structure of another laser provided by an embodiment of the present inventi...

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PUM

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Abstract

The invention relates to the semiconductor laser technology field and especially relates to a laser light source system and a display apparatus. A laser, a heat sink and a uniform light device are included. The laser comprises N laser chips and the N is an integer which is greater than or equal to 1. The N laser chips are arranged on the heat sink. In the heat sink, thermal conductivities of positions where at least two laser chips are located are different so that the laser chips at different positions possess a temperature difference and wavelengths of output light of the laser chips are changed. Laser beams emitted by the N laser chips are entered into the uniform light device. Through the uniform light device, the laser beams with different wavelength are superposed and finally laser beams which are uniformly distributed are acquired so that laser coherence is reduced and laser speckles are effectively restrained. The structure of the laser light source system is simple, cost is low and the system is easy to realize.

Description

technical field [0001] The invention relates to the technical field of semiconductor lasers, in particular to a laser light source system and a display device. Background technique [0002] Due to the advantages of good monochromaticity, good directionality, high brightness and linear spectrum, laser is very suitable for display devices. Laser display technology is considered to be the fourth-generation display technology after black and white display, color display and high-definition digital display. , energy saving and environmental protection. Due to the high coherence of laser light, when using laser light as a display light source, speckles will be generated on the screen. The existence of speckle seriously affects the imaging quality of laser display, and reduces the contrast and resolution of the image. It has become one of the main reasons that restrict and hinder the rapid development and marketization of laser display. [0003] In order to eliminate laser speck...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S5/40G02B27/48
Inventor 田有良刘显荣
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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