High-brightness, wide-color-gamut and low-light-spot laser scanning projection module
A laser scanning and projection module technology, applied in optics, optical components, instruments, etc., can solve the problem of no effective measures to reduce or eliminate light spots in laser projection devices, and achieve the effects of high contrast, reduction of light spots, and high projection brightness.
Active Publication Date: 2020-10-13
深圳市锐思华创技术有限公司
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Problems solved by technology
[0015] The existing laser projection device has no effective measures to reduce or eliminate the spot, and the spot problem is still an important research topic on the existing laser projection optical system
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[0043] Such as figure 2 , a laser scanning projection module with high brightness, wide color gamut and low spot, which includes a laser diode unit, a condenser lens unit 4, a combined optical fiber 6, a collimating mirror unit 5, a scanning micromotor 8, and a scanning mirror 7. And the projection screen 10, the laser diode unit is made up of monochromatic laser diodes of three colors, including red laser diode 1, green laser diode 2, and blue laser diode 3, and each of the monochromatic laser diodes includes three monochromatic laser diodes, the area of the light-emitting point of a single monochromatic laser diode is S LD , the light emitting angle of a single monochromatic laser diode is SINθ LD , the output light source extension of a single monochromatic laser diode is S LD *SINθ LD ;
[0044] Such as image 3 , the laser wavelength selection of monochromatic laser diodes of the same color is judged by CIE1931 color scale diagram and MacAdam ellipse, image 3 Am...
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A high-brightness, wide-color-gamut and low-light-spot laser scanning projection module at least comprises a laser diode unit, a condenser lens unit, a combined optical fiber, a collimating lens unit,a scanning micromotor, a scanning reflector and a projection screen, the laser diode unit is composed of monochromatic laser diodes of two or three colors, and monochromatic laser diodes of each color comprises two or more monochromatic laser diodes; laser wavelength selection of the monochromatic laser diodes of the same color is judged by adopting a CIE1931 color gradation diagram and a MacAdamEllipse, and the laser wavelength has at least three-order deviation. According to the projection module, the number of spectrum laser diodes of the same color is increased, and a collecting lens focusing mode and an optical fiber leading-in mode are adopted, so the projection brightness is high; the same color laser with at least three-order deviation of the frequency spectrum is selected by adopting the CIE1931 color gradation diagram and the MacAdam Ellipse, and the laser coherence is destroyed by increasing the frequency spectrum width, so that light spots are reduced, and the projectionis wide in color gamut and low in light spot.
Description
technical field [0001] The invention relates to a vehicle-mounted laser projection device, in particular to a laser scanning projection module that increases the number of laser diodes of the same color spectrum and increases the spectrum width, and adopts a condenser lens focusing method and an optical fiber introduction method to project high brightness, wide color gamut and low spot. Background technique [0002] At present, there are three main types of vehicle-mounted projection modules, DLP (Digital Light Processing) projection modules, liquid crystal projection modules, and laser scanning modules. The working principles of DLP and liquid crystal projection modules are the same. The chip or liquid crystal display chip is used as the image display source, and the image is projected to the required area by means of projection. These two methods have the advantage of high brightness, but at the same time have the disadvantage of low contrast. The laser scanning projection ...
Claims
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IPC IPC(8): G02B27/48G02B27/09G02B26/10G03B21/20
CPCG02B27/48G02B27/0994G02B27/0955G02B26/101G02B26/105G03B21/2033
Inventor 黄曙光卢睿罗敬凯
Owner 深圳市锐思华创技术有限公司