Laser light source and laser projection equipment
A laser light source and laser technology, applied in optics, optical components, instruments, etc., can solve the problems of projected image quality degradation, reduced user viewing experience, dizziness and discomfort, etc., and achieve the effect of reducing speckle phenomenon
Inactive Publication Date: 2016-12-14
HISENSE
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[0003] The high coherence of laser also brings the speckle effect in laser projection display. Speckle is that when a coherent light source irradiates a rough object, the scattered light will interfere in space because of its same wavelength and constant phase. Some parts of the space have interference and constructive effects, and some parts have interference and destructive effects. The final result is granular light and dark spots on the screen. These unfocused spots appear to be in a flickering state to the human eye, and are prone to appear after long-term viewing. Dizziness and discomfort will cause the degradation of projected image quality and reduce the user's viewing experience
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0030] In the optical path of laser transmission, there are often many optical lenses, which generally include optical lenses such as convex lenses, concave-convex mirrors, dichroic mirrors, and collimating lenses. The light beam emitted by the laser is transmitted in each lens in the optical path, and is transmitted or reflected for optical processing.
[0031] In the prior art, the MEMS (Microelectromechanical Systems, referred to as mic...
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The invention discloses a laser light source and laser projection equipment. The embodiment of the laser light source provided by the invention comprises a laser with at least one kind of color for emitting laser with at least one kind of color; the laser light source is characterized in that a transmission optical path of the laser with at least one kind of color comprises a speckle-dissipating part; the speckle-dissipating part comprises an optical lens and a driving part; the driving part drives the optical lens to rotate; and an included angle of not equal to 90 degrees is formed between a rotary axis and the mirror surface of the optical lens is formed. The optical lens is driven by the driving part to rotate, so that the position of the light spot formed in light beam emission is changed along with time, so that a condition that the laser beam illuminates a same position of the optical lens for a long time is avoided; and when the light spot position change causes an integral effect to human eyes, a speckle effect is weakened. By adoption of the laser light source and the laser projection equipment provided by the invention, the problems of laser speckle and degradation of a projection image quality are relieved.
Description
technical field [0001] The invention relates to the field of laser display, in particular to a laser light source and laser projection equipment. Background technique [0002] Laser is a light source with high brightness, strong directionality, and monochromatic coherent light beam. As an excellent coherent light source, laser light source has the advantages of good monochromaticity, strong directionality, and high luminous flux. Projection display technology field. [0003] The high coherence of laser also brings the speckle effect in laser projection display. Speckle is that when a coherent light source irradiates a rough object, the scattered light will interfere in space because of its same wavelength and constant phase. Some parts of the space have interference and constructive effects, and some parts have interference and destructive effects. The final result is granular light and dark spots on the screen. These unfocused spots appear to be in a flickering state to th...
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IPC IPC(8): G03B21/20G02B27/48
CPCG03B21/2033G02B27/48G03B21/204G03B21/2066G03B21/208
Inventor 李巍田有良
Owner HISENSE