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Laser light source and projection device

A laser light source, laser technology, applied in optics, instruments, projection devices, etc., can solve problems such as degradation of projected image quality

Inactive Publication Date: 2018-04-06
HISENSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a laser light source and projection equipment, which are used to alleviate the problems of laser speckle and degradation of projected image quality

Method used

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  • Laser light source and projection device
  • Laser light source and projection device
  • Laser light source and projection device

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] As mentioned in the background technology, light beams interfere in space, and there will be bright and dark spots when presented on the screen. These spots appear to be in a flickering state to the human eye, and it is easy to cause dizziness and discomfort when viewed for a long time, and even cause the quality of the projected image to deteriorate. Deterioration, reducing the user's viewing experience.

[0032] In order to solve ...

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Abstract

The invention discloses a laser light source and a laser projection device. The laser light source provided by an embodiment of the present invention comprises lasers of at least two colors which canemit laser light of at least two colors; a reflection bowl, a diffuse reflection device, and an integrator rod are arranged in the transmission optical path of the laser light of at least two colors,wherein the reflection bowl can allow laser light to pass, make the same arrive at the diffuse reflection device, and reflect laser light which is diffusely reflected by the diffuse reflection device,the diffuse reflection device is used for diffusedly reflecting the laser light transmitted by the reflection bowl to the reflection bowl, and the integrator rod is used for receiving the laser lightreflected by the reflection bowl and uniformizing the received laser light. The laser light passes through the reflection bowl and arrives at the diffuse reflection device, and forms a light spot onthe diffuse reflection portion of the diffuse reflection device; the light spot on the diffuse reflection portion of the diffuse reflection device is diffusely reflected; and since the light spot is reflected to various directions, the diffuse reflection angles of light beams are increased, and the coherence of the angles of the light beams is weakened, and thus, a speckle phenomenon can be fadedand weakened.

Description

technical field [0001] The invention relates to the field of laser display, in particular to a laser light source and laser projection equipment. Background technique [0002] Laser is a light source with high brightness, strong directionality, and monochromatic coherent light beam. As an excellent coherent light source, laser light source has the advantages of good monochromaticity, strong directionality, and high luminous flux. Projection display technology field. [0003] The high coherence of the laser also brings about the speckle effect in the laser projection display. The speckle is the scattered light when the coherent light source irradiates a rough object. Since the wavelength is the same and the phase is constant, it will interfere in space. , some parts of the space interfere constructively, and some parts interfere destructively. The final result is granular light and dark spots on the screen. The feeling of dizziness and discomfort is generated, and the quali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20
CPCG03B21/2033G03B21/2066G03B21/208
Inventor 李巍刘显荣
Owner HISENSE
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