Laser projection equipment and laser projection display control method

A technology of laser projection and equipment, which is applied in the field of projection display, can solve problems affecting image display effects, etc., and achieve the effect of eliminating speckle, reducing the average radius of speckle, and reducing coherence

Active Publication Date: 2022-08-02
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Application Information

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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.

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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 objectives, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0037] first, figure 1 A schematic structural diagram of a disassembled optical engine of a laser projection device is shown. like figure 1 As shown, the laser projection device includes a laser light source 10, an optical machine 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 enters the illumination light path part in the light machine 20 after being combined and shaped, and the rear end of the illumination light path part is a digital micromirror device (DMD) array. , DLP) projection architecture, DMD chip is the core light modulation device. The DMD chip receives the driving control signal corres...

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Abstract

The application discloses a laser projection device and a laser projection display control method, which belong to the field of projection display. The signal shaping circuit in the laser projection device is used to shape the initial signal to obtain the target signal, and transmit the target signal to the laser driving component to drive the corresponding laser to emit laser light. Since the frequency of the target signal is greater than the frequency of the initial signal, and in one cycle of the initial enable signal, the total duration of the target signal being at the active level is less than the duration of the initial signal being at the active level, so the laser driving component is in the initial enable signal. In one cycle of , the driving current provided to the laser can be changed in response to the target signal, and the emitting wavelength of the laser can be changed to realize the dissipation of the speckle 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] At present, the laser 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 laser projection equipment will form bright and dark spots, also known as speckle, on the projection screen, which seriously affects the display effect of the image. SUMMARY OF THE INVENTION [0004] The 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 emitted by the laser projection device irradiates the projection screen to form bright and ...

Claims

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Application Information

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Patent Type & Authority Patents(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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