Speckle dispersal device, projection equipment light source and projection equipment

A projection device and a speckle dissipation technology, applied in the field of projection display, can solve problems such as poor display quality of projection images, and achieve the effects of reducing speckle effect, increasing spatial random phase, and improving display quality

Active Publication Date: 2017-12-19
HISENSE VISUAL TECH CO LTD
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Problems solved by technology

[0005] The purpose of the present disclosure is to provide a device for dispelling speckles, a light source for projection equipment, and projection equipment, so as to overcome the speckle phenomenon caused by the characteristics of the laser itself and the projection screen display caused by the limitations and defects of related technologies at least to a certain extent poor quality problem

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  • Speckle dispersal device, projection equipment light source and projection equipment
  • Speckle dispersal device, projection equipment light source and projection equipment
  • Speckle dispersal device, projection equipment light source and projection equipment

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[0055]Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details being omitted, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solutions...

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Abstract

The invention provides a speckle dispersal device, a projection equipment light source and projection equipment. The speckle dispersal device comprises a diffusion part used for diffusing uniform incidence laser and an offset part used for emitting the incident laser to the diffusion part and further making an optical path of the laser emitted from the offset part generate preset displacement. The speckle dispersal device is advantaged in that through combination of the diffusion part and the offset part, the laser emitted from the offset part can be made to generate preset displacement, so the space random phase of the laser is enhanced, laser coherence is reduced, the speckle effect is weakened, and display quality of frames of the projection equipment is improved.

Description

technical field [0001] The present disclosure relates to the technical field of projection display, and in particular, to a speckle elimination device, a light source of a projection device, and a projection device. 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. There are grainy light and dark spots on the display, which degrades the projected image quality. [0003] At present, in order to reduce the speckle effect caused by the characteristics of the laser itself, in the existing technology, a rotating scattering sheet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/48G03B21/20
CPCG02B27/48G03B21/2013G03B21/204
Inventor 张勇田有良高迪刘洪岩
Owner HISENSE VISUAL TECH CO LTD
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