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Laser projection equipment

A technology of laser projection and equipment, which is applied in optics, image reproducers, instruments, etc. using projection devices, and can solve problems such as affecting the image display effect.

Active Publication Date: 2020-09-18
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high coherence of laser light, the laser light emitted by the projection equipment will form bright and dark spots on the projection screen, also known as speckle, which seriously affects the display effect of the image.

Method used

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  • Laser projection equipment
  • Laser projection equipment
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Embodiment Construction

[0038] In order to make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0039] Picture 1-1 It is a schematic diagram of a laser projection device provided by an embodiment of the present application. Such as Picture 1-1 As shown, after the upper casing of the laser projection device is disassembled, the internal structure is divided according to optical functions, which may include a light source 100, an optical engine 200, and a lens 300. The light source 100 is used to provide a light source illuminating light beam and transmit it to the rear end. Light modulation device and projection lens. The light source 100 may include a laser of at least one color, such as a blue laser, a dual-color laser, such as a blue laser and a red laser, or a three-color laser light source, including red, green, and blue. Col...

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PUM

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Abstract

The invention discloses laser projection equipment, which comprises a laser light source which comprises a laser used for emitting a laser beam and providing an illumination beam for the equipment; aTV board which is used for receiving and decoding a video stream and outputting a video image signal; a display panel which comprises a display control processing part used for synchronously outputting an initial driving signal used for driving the laser and an image display driving signal used for driving a light modulation device, wherein the light modulation device modulates the laser beam under the driving of an image display driving signal; a projection lens which is used for receiving the modulated laser beam and performing projection imaging; a signal shaping circuit which is used for outputting a shaping signal, wherein the shaping signal is superposed on the initial driving signal to form a target driving signal; and the laser which is used for emitting light or extinguishing light under the driving of the target driving signal, wherein the frequency of the target driving signal is N times of the frequency of the initial driving signal, and N is greater than 5000. When the laser projection equipment performs projection display, the speckle phenomenon can be weakened or inhibited.

Description

Technical field [0001] This application relates to the field of projection display, in particular to a laser projection device. Background technique [0002] At present, the projection device may include a light source, and after the laser light emitted by the light source is projected onto the projection screen, the image can be projected onto the projection screen. [0003] However, due to the high coherence of the laser, the laser emitted by the projection device irradiates the projection screen to form bright and dark spots, also called speckles, which seriously affects the display effect of the image. Summary of the invention [0004] The embodiment of the present application provides a laser projection device, which can reduce or suppress the speckle phenomenon in the laser projection display image. The technical solutions adopted are as follows: [0005] A laser projection equipment, including: a laser light source, a light modulation device, a projection lens, a TV board, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31G03B21/20
CPCH04N9/3141H04N9/3161H04N9/3155G03B21/2033
Inventor 田有良崔荣荣颜珂刘广学
Owner QINGDAO HISENSE LASER DISPLAY CO LTD