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Laser projection equipment and laser projection display control method

A technology of laser projection and equipment, applied in the field of projection display, can solve problems such as affecting the image display effect, and achieve the effect of dissipating speckle, reducing coherence, and reducing the average radius of speckle

Active Publication Date: 2021-12-07
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present disclosure provide a laser projection device and a laser projection display control method, which can solve the problem in the related art that the laser light emitted by the laser projection device irradiates on the projection screen to form bright and dark spots, thereby affecting the display effect of the image.

Method used

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  • Laser projection equipment and laser projection display control method
  • Laser projection equipment and laser projection display control method
  • Laser projection equipment and laser projection display control method

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Embodiment Construction

[0036] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0037] first, figure 1 A schematic structural diagram of the disassembled optical engine of a laser projection device is shown. Such as figure 1 As shown, the laser projection device includes a laser light source 10, an optical engine 20, and a lens 30, wherein the light source 10 includes a three-color laser light source for providing three-color laser illumination beams. The laser beam provided by the light source 10 is incident on the illumination light path part in the light machine 20 after being combined and shaped, and the back end of the illumination light path part is a digital micromirror device (digital micromirror device, DMD) array. , DLP) projection architecture, the DMD chip is the core light modulation device. Th...

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Abstract

The invention discloses laser projection equipment and a laser projection display control method, and belongs to the field of projection display. A signal shaping circuit in the laser projection equipment is used for shaping an initial signal to obtain a target signal, and transmitting the target signal to a laser driving assembly to drive a corresponding laser to emit laser. The frequency of the target signal is greater than that of the initial signal, and the total duration of the target signal at the effective level in one period of the initial enable signal is less than the duration of the initial signal at the effective level; therefore, in one period of the initial enable signal, the laser driving assembly can change the driving current provided for the laser in response to the target signal, so that the light emitting wavelength of the laser is changed, and speckle elimination is realized from the source.

Description

technical field [0001] The present disclosure relates to the field of projection display, in particular to a laser projection device and a laser projection display control method. Background technique [0002] Currently, a laser projection device may include a light source, and after the laser light emitted by the light source is projected onto a projection screen, an image may be projected onto the projection screen. [0003] However, due to the high coherence of laser light, light and dark spots, also known as speckle, will be formed when the laser light emitted by the laser projection equipment irradiates on the projection screen, which seriously affects the display effect of the image. Contents of the invention [0004] Embodiments of the present disclosure provide a laser projection device and a laser projection display control method, which can solve the problem in the related art that the laser light emitted by the laser projection device irradiates on the projectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31G03B21/20
CPCH04N9/3141H04N9/3161H04N9/3179G03B21/2033G03B21/2013G03B21/20H04N9/31
Inventor 崔荣荣
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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