Laser array, laser light source and laser projection equipment

A laser array and laser light source technology, applied in optics, instruments, optical components, etc., can solve the problems of unfavorable home use, large size, and increased optical path complexity, etc., to reduce the complexity of the structure, reduce the speckle effect, and facilitate miniaturization Effect

Pending Publication Date: 2020-03-27
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some methods to weaken the influence of speckle by vibrating optical fibers, vibrating screens, etc., but limited by application scenarios and costs. Larger size is not conducive to home use, and the vibration screen requires an additional drive circuit for the screen. With the increase of the screen size, it also brings difficulty and high cost to the drive control
[0005] At present, the commonly used speckle elimination scheme is usually based on the addition of speckle dissipation components in the transmission optical path by laser, which increases the complexity of the optical path, and the effect of speckle dissipation is also related to the light processing efficiency of the optical path design, which greatly restricts the speckle dissipation of the entire optical system. problem solving

Method used

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  • Laser array, laser light source and laser projection equipment
  • Laser array, laser light source and laser projection equipment
  • Laser array, laser light source and laser projection equipment

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] An embodiment of the present invention provides a laser array, referring to Figure 2A , Figure 2A It is a schematic cross-sectional view of the laser array in the embodiment of the present invention. The laser array in this embodiment includes a light-emitting part 021 for emitting laser beams, and a sealing part 022 is provided along the light-emitting direction of the light-emitting part 021 for transmitting the above-mentioned laser light beam. Specifically, see Figure 3A As shown, the light emitting part 021 includes a light emitting chip 0211 and a metal substrate 0212, and the light emitting chip is connected and fixed on the metal substrate 0212. The light-emitting chip 0211 emits a laser beam under electric drive, wherein the laser beam is linearly polarized light. And, the sealing part 022 includes a first light-transmitting area and a second light-transmitting area, wherein the arrangement of the first light-transmitting area and the second light-transmi...

Embodiment 2

[0088] The present invention also provides a laser light source, such as Figure 8 As shown, it includes a laser array 801, a convergence shaping unit 802, and the convergence shaping unit 802 converges and shapes the laser beam emitted by the laser array 801 to form an illumination beam, which is then homogenized by the homogenization unit 803 and incident into the optical machine. Wherein, the homogenizing part 803 may be a light guide, or may be a fly-eye lens. The shaped laser beam can pass through, for example, a moving diffusion wheel, a diffusion sheet, or a phase adjustment device before being incident on the homogenization unit 803 or after being homogenized by the homogenization unit 803 to dissipate speckles.

[0089]The laser array 801 in this embodiment can be an example of any laser array in the embodiment. Since the laser array is used, the coherence characteristic or speckle effect of the laser beam can be suppressed from the source, and a high-quality illumina...

Embodiment 3

[0091] The present invention also provides a laser projection device, such as Figure 9 As shown, it includes a laser light source 901, a light modulation device 902, and a projection lens 903. The laser light source 901 emits a laser beam to form an illumination beam that irradiates to the light modulation device 902, specifically, to the light modulation device 902. In the DLP architecture, The light modulation device 902 can specifically be a DMD digital micromirror array, including millions of tiny mirrors. The light modulation device 902 modulates the illumination beam according to the driving signal corresponding to the image display signal, and the modulated light beam enters the projection lens for imaging, wherein , the laser light source is the laser light source in the above embodiment. The laser projection device provided in this embodiment can be a laser projector or a laser projection TV, wherein the laser light source can improve the high-quality illumination be...

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Abstract

The invention discloses a laser array, a laser light source and laser projection equipment, and belongs to the technical field of laser display. The laser array comprises a light-emitting chip arranged on a metal substrate and used for emitting laser beams, and a sealing part is arranged in the light-emitting direction and used for forming a sealed space with the metal substrate in an enclosing mode and sealing the light-emitting chip in the sealed space. The sealing part comprises a first light-transmitting area and a second light-transmitting area, and due to the arrangement of the first light-transmitting area and the second light-transmitting area, light beams transmitting through the two areas from the light-emitting part have different polarization directions, the coherence of laserbeams emitted by the laser array can be reduced, and speckle elimination is facilitated.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a laser array, related laser light sources and laser projection equipment. Background technique [0002] In recent years, lasers have been gradually used as light sources in the field of projection display technology. However, due to the high coherence of laser light, speckle effect is unavoidable. The so-called speckle means that when a coherent light source irradiates a rough object, the scattered light has the same wavelength and a constant phase, thereby causing interference in space. Some parts of the space interfere constructively and some parts interfere destructively. Grainy light and dark spots appear on the display side, resulting in a degradation of projected image quality. [0003] figure 1 It shows a schematic structural diagram of a laser array in the prior art, which includes a metal bracket 01, and the metal bracket 01 is formed with a plurality of groove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G02B27/48
CPCG03B21/2033G03B21/2073G03B21/2013G02B27/48
Inventor 田有良李巍周子楠
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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