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Laser projection device and laser driving control method

A technology of laser projection and laser, which is applied in the field of projection display and can solve problems affecting image display effects

Active Publication Date: 2022-06-28
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 device and laser driving control method
  • Laser projection device and laser driving control method
  • Laser projection device and laser driving control method

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Embodiment Construction

[0031] In order to make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0032] Picture 1-1 It is a schematic diagram of a laser projection device provided by an embodiment of the present application. like Picture 1-1 As shown in the figure, after the upper casing is disassembled, the internal structure of the laser projection device is divided according to optical functions, and may include a light source 100, an optomechanical 200, and a lens 300, wherein the light source 100 is used to provide a light source illumination beam, which is transmitted to the rear end Light modulation devices and projection lenses. The light source 100 may include a laser of at least one color, such as a blue laser, or a two-color laser, such as a blue laser and a red laser, or a three-color laser light source, including red, ...

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Abstract

The present application discloses a laser projection device and a laser driving control method, including: a display control processing unit, a signal shaping circuit, a laser driving circuit, a laser, and a light modulation device; wherein, the display control processing unit is used to output an image display driving signal to The light modulation device is also used to output the initial image enabling signal and the initial current control signal to the laser driving circuit to drive the laser to emit light or to extinguish; the signal shaping circuit is arranged on both the initial image enabling signal and the initial current control signal Or any of the two is transmitted to the path of the laser for outputting the shaping signal, and the shaping signal is superimposed on the above two signals or either of the two to form the target driving signal; the laser is used to emit light under the driving of the target driving signal or Off, the target driving signal is a high-frequency periodic driving signal. When the above laser projection device performs projection display, the speckle phenomenon can be weakened or suppressed.

Description

technical field [0001] The present application relates to the field of projection display, and in particular, to a laser projection device and a laser drive control method. 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 light, the laser light emitted by the projection device 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 application provide a laser projection device, which can weaken or suppress the speckle phenomenon in a laser projection display image. The technical solutions adopted are as follows: [0005] A laser projection device, comprising: a display control pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/31
CPCH04N9/3161
Inventor 田有良颜珂崔荣荣
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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