CN105116485B - Light guide, laser light source and laser display system - Google Patents
Light guide, laser light source and laser display system Download PDFInfo
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- CN105116485B CN105116485B CN201510645530.6A CN201510645530A CN105116485B CN 105116485 B CN105116485 B CN 105116485B CN 201510645530 A CN201510645530 A CN 201510645530A CN 105116485 B CN105116485 B CN 105116485B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
- G02B6/0006—Coupling light into the fibre
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
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- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
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Abstract
The present invention discloses a kind of light guide, laser light source and laser display system, laser light source includes at least one laser module and at least one light guide positioned at corresponding laser module output light path, the radial dimension of the light guide is along the multiple gradual change in paths direction, the laser that laser module projects changes light path after entering light guide, to eliminate the coherence of laser.Technical solution of the present invention can be widely applied in various laser display systems, inhibit the speckle phenomena in laser display system, improves image quality, improves brightness, the uniformity and the color saturation of picture, promote the ornamental comfort level of picture.
Description
Technical field
The present invention relates to laser display fields.More particularly, to light guide, laser light source and laser display system.
Background technique
Laser has high brightness, therefore laser display is easier to reach the large screen display of the human eye geometry limit of resolution；Laser
It is line spectrum, if the spectrum width of laser is 5nm, and existing display light spectral width is 40nm, then the face that laser display can be presented
Chromatic number improves about 500 times than existing display, therefore laser display can be realized double high definitions；Laser is full with higher color simultaneously
And degree, the chromatic triangle area to be formed can be made as big as possible by selecting the three primary colours wavelength close to coloration vertex angle,
It shows truer, the richer color of nature, true Three-dimensional Display may be implemented by laser holography.Therefore, laser is aobvious
Show be the following display technology developing direction.But due to the strong coherence of laser, when imaging, will form speckle noise, so that image
Gray scale acute variation, the detailed information of hidden image, influences image quality, reduces the clarity and resolution ratio of image, so
It needs to control speckle.How the influence of speckle noise be always people research the problem of is weakened.Many research work people
Member proposes the method for reducing speckle contrast, such as laser coherence is reduced using the light source illumination of different wave length, to press down
Speckle processed；Inhibit speckle using the methods of the superposition of pulse laser, mobile scatterer.Although these methods reduce speckle
It influences, but system is complex.
Denomination of invention: the laser display system of dissipation spot, publication number: the application for a patent for invention of CN 104345470A discloses
It is a kind of by the way that light guide plate module is added in the laser light source module and display module to destroy the coherence of laser, thus
The device of speckle is eliminated, but its light guide plate module used is the addition light-scattering material particle in acryl plates casting process
And be made, there are Railway Projects, first can to swash for the light-scattering material particle in the light guide plate module for the light guide plate module
Light forms many reflections, to reduce the optical power of output, second is acryl plates non-refractory, and third is the leaded light template die
The complex manufacturing technology of block, so the device is not suitable for largely putting into production.
Accordingly, it is desirable to provide a kind of light guide, laser light source and laser display system.
Summary of the invention
The purpose of the present invention is to provide a kind of light guide, laser light source and laser display system, light guide and laser light source can
It is widely used in various laser display systems, inhibits the speckle phenomena in laser display system, improve image quality, improves picture
Brightness, the uniformity and the color saturation in face promote the ornamental comfort level of picture.
In order to achieve the above objectives, the present invention adopts the following technical solutions:
A kind of light guide, the radial dimension of the light guide is along the multiple gradual change in paths direction.
Preferably, light guide is optical rod, the transformation range of the radial dimension of optical rod are as follows: 0.1mm to 10cm.
Preferably, light guide is optical fiber, the transformation range of the radial dimension of optical fiber are as follows: 0.01 μm to 10 μm.
A kind of laser light source, at least including at least one laser module and positioned at corresponding laser module output light path
One light guide, the radial dimension of light guide is along the multiple gradual change in paths direction.
Preferably, light guide is optical rod, the transformation range of the radial dimension of optical rod are as follows: 0.1mm to 10cm.
Preferably, light guide is optical fiber, the transformation range of the radial dimension of optical fiber are as follows: 0.01 μm to 10 μm.
A kind of laser display system, the system include:
Red laser module, green (light) laser module, blue laser module, multiple collimating and correcting modules, Duo Geguang
It leads, light valve, combiner device, imaging lens,
Standard is arranged in sequence on the output light path of red laser module, green (light) laser module and blue laser module
Straight Shaping Module and light guide；Three beams of laser after light guide first passes around the light valve in itself optical path, then passes through combiner
Device, or combiner device is first passed around, subsequently into same light valve, projected by imaging lens,
The multiple light guide is respectively light guide of the radial dimension along the multiple gradual change in paths direction.
Preferably, multiple light guides are respectively optical rod, the transformation range of the radial dimension of optical rod are as follows: 0.1mm to 10cm.
Preferably, multiple light guides are respectively optical fiber, the transformation range of the radial dimension of optical fiber are as follows: 0.01 μm extremely
10μm。
Beneficial effects of the present invention are as follows:
Technical solution of the present invention can be widely applied in various laser display systems, compared to existing laser display
System can inhibit the speckle phenomena in laser display system, improve image quality significantly, improve brightness, the uniformity of picture
And color saturation, the ornamental comfort level of picture is promoted, and the manufacturing process of technical solution of the present invention is simple, at low cost
It is honest and clean, it is suitable for largely putting into production.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 shows the structural schematic diagram of embodiment 1.
Fig. 2 shows the structural schematic diagrams of embodiment 3.
Fig. 3 shows the structural schematic diagram of embodiment 4.
Fig. 4 shows the structural schematic diagram of embodiment 5.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawings
It is bright.Similar component is indicated in attached drawing with identical appended drawing reference.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
The present invention provides a kind of light guide, contain the light guide laser light source and laser display system,
It is a kind of light guide first, the radial dimension of the light guide is along the multiple gradual change in paths direction, multiple gradual change here
Are as follows: it is descending and ascending be varied multiple times or ascending and descending be varied multiple times.The light guide use is in laser source
Or before laser display system, radial dimension has completed along the shape of the multiple gradual change in paths direction.The light guide can
Applied to various laser sources such as semiconductor laser light source, all-solid state laser sources, which is set on the output light path of laser
?.
Followed by containing the laser light source of the light guide, at least one laser module of laser light source and positioned at corresponding laser
At least one of module output light path light guide.Atom-exciting gives off photon, and laser is exactly the molecular photon of these light
Queue (or can be regarded as what beam of laser was made of light), photon frequency having the same, phase and polarization in laser
State, therefore laser has the characteristics that good monochromaticjty, good directionality, coherence are good, and laser cell injection in laser module
After laser enters the light guide, because the radial dimension of the light guide is along the multiple gradual change in paths direction, laser is in the light guide
Light can occur randomly to reflect, scatter when middle propagation, and the light path of light changes, so that the phase of light is changed, into
And eliminate the coherence of laser.
It is finally the laser display system containing the light guide, using containing the light guide laser light source as the laser display system
The laser light source of system is equipped with collimating and correcting module, light valve, imaging lens head etc., because having eliminated the coherence of laser,
The high quality graphic of no speckle can be shown on the screen.
It is below 5 embodiments of the invention.
Embodiment 1
As shown in Figure 1, light guide provided in this embodiment is a kind of optical rod of variable diameter, the radial dimension of the optical rod is along light
The multiple gradual change in the road direction of propagation, multiple gradual change are as follows: descending and ascending be varied multiple times or ascending and descending
It is varied multiple times, the transformation range of the radial dimension of the optical rod are as follows: 0.1mm to 10cm.The optical rod be set to laser source or
Before laser display system, the shape of variable diameter has completed.
Embodiment 2
Light guide provided in this embodiment is a kind of optical fiber of variable diameter, and the radial dimension of the optical fiber is along paths
The multiple gradual change in direction, multiple gradual change are as follows: descending and ascending be varied multiple times or ascending and descending repeatedly change
Become, the transformation range of the radial dimension of the optical fiber are as follows: 0.01 μm to 10 μm.The optical fiber is being set to laser source or is swashing
Before light display system, the shape of variable diameter has completed.
Embodiment 3
As shown in Fig. 2, laser light source provided in this embodiment includes laser module and radial dimension along paths side
To the light guide of multiple gradual change, light guide is set on laser module output light path.Atom-exciting gives off photon, and laser is exactly
The molecular photon queue of these light, photon frequency having the same, phase and polarization state in laser, therefore laser have single
The features such as color is good, good directionality, good coherence, and the laser that the laser element in laser module projects enters the light guide
Afterwards, because the radial dimension of the light guide is along the multiple gradual change in paths direction, laser can occur when propagating in the light guide
It randomly reflects, scatter, the light path of laser changes, to change the phase of laser, and then eliminates the relevant of laser
Property.Laser module in the present embodiment is semiconductor laser or all solid state laser.
Embodiment 4
As shown in figure 3, laser display system provided in this embodiment includes:
Red laser module 1, green (light) laser module 2, blue laser module 3 export feux rouges, green correspondingly
Light, blue light, feux rouges, green light, the output light path of blue light are respectively different；
The collimating and correcting module 4,5,6 being separately positioned on the output light path of feux rouges, green light, blue light, difference collimating and correcting
Feux rouges, green light, blue light；
The light guide 7,8,9 being separately positioned on the output light path of feux rouges, green light, blue light, after changing collimating and correcting respectively
Feux rouges, green light, blue light light path, light guide 7,8,9 be respectively radial dimension along the multiple gradual change in paths direction light guide；
The light valve 12,13,14 being separately positioned on the output light path of feux rouges, green light, blue light, to change light path feux rouges,
Green light, blue light are respectively controlled to generate the red of different gray-levels, green, blue image；
The reflecting mirror 10,11 being separately positioned on red, blue image output light path, respectively by red, blue image
It reflects into combiner device 15
Red, green, blue image synthesis are synthesized light beam by combiner device 15 all the way；
Imaging lens 19 project red, green, blue image on screen 20.
Wherein
Light guide is the coherence for eliminating laser, and then realizes the Primary Component without speckle laser display, light in the present embodiment
Light of the radial dimension led in the multiple gradual change in paths direction, laser can occur randomly to roll over when propagating in the light guide
It penetrates, scatter, the light path of light changes, to change the phase of laser, and then eliminates the coherence of laser.
The laser display system further preferably includes radiating module 16-1,16-2,16-3, temperature control module 17:
Red laser module 1 is fixed on radiating module 16-1, and green (light) laser module 2 is fixed on radiating module 16-2
On, blue laser module 3 is fixed on radiating module 16-3；
Temperature control module 17 controls the heat dissipation capacity of above three radiating module respectively, to control red laser module respectively
1, green (light) laser module 2, the emitted laser of blue laser module 3 wavelength.It can control temperature by temperature control module 17
To adjust wavelength of each laser module under specific output power, especially relatively high power.
The wave-length coverage that red laser module 1 exports laser is 635nm -670nm；The output of green (light) laser module 2 swashs
The wave-length coverage of light is 515nm -530nm；The wave-length coverage that blue laser module 3 exports laser is 440nm -460nm；It is red
Light laser module 1, green (light) laser module 2, blue laser module 3 are multiple including different central wavelengths correspondingly
Red laser unit, multiple green laser units of different central wavelength, different central wavelengths multiple blue laser units, it is more
A red laser unit, multiple green laser units, multiple blue laser units central wavelength cover feux rouges correspondingly
Laser module 1, green (light) laser module 2, the wave-length coverage for exporting laser of blue laser module 3, specifically:
Red laser module 1 includes five red laser units, and the central wavelength of each red laser unit is respectively
635nm, 640nm, 650nm, 660nm, 670nm set gradually collimating and correcting mould on the output light path of red laser module 1
Block 4, light guide 7, reflecting mirror 10, light valve 12, combiner device 15；
Green (light) laser module 2 includes containing three green laser units, and the central wavelength of each green laser unit is respectively
515nm, 520nm, 530nm set gradually collimating and correcting module 5, light guide 8, light on the output light path of green (light) laser module 2
Valve 13, combiner device 15；
Blue laser module 3 includes three blue laser units, and the central wavelength of each blue laser unit is respectively
440nm, 450nm, 460nm set gradually collimating and correcting module 6, light guide 9, reflection in the output light path of blue laser module 3
Mirror 11, light valve 14, combiner device 15.
Each red laser unit, each green laser unit, each blue laser unit are respectively by laser single pipe or laser
Array composition.
The laser display system further preferably includes laser control module 18, and automatic choosing respectively can be required according to display color
The red laser unit, green laser unit, blue laser unit for selecting suitable central wavelength make it shine, so as to realize ratio
The higher colour gamut covering of the prior art.Such as middle cardiac wave in red laser module 1 is selected by laser control module 18 respectively
The red laser unit of a length of 635nm shines, and the green laser unit that middle cardiac wave is 530nm in green (light) laser module 2 shines,
The blue laser unit that central wavelength is 440nm in blue laser module 3 shines.According to the color requirements of display, in order to aobvious
The part colours that above-mentioned one region of the chromatic triangle left side is not covered in diagram 3, can control by laser control module 18
The green laser unit that central wavelength in green (light) laser module 2 is 515nm shines, and the chromatic triangle newly formed just covers
The part colours region that first chromatic triangle is not covered with, extends the color domain coverage ratio of display.As a same reason,
The coloration that any combination is formed between the laser cell of different central wavelengths in the present embodiment in red, green, blue laser module
Triangle covered color region be all the present embodiment a kind of covered color gamut of laser display system institute, thus
Significantly improve color domain coverage ratio.
Collimating and correcting module 4,5,6 is respectively non-spherical lens, cylindrical lens or spherical lens in the present embodiment.
Light valve 12,13,14 is respectively transmission liquid crystal light valve, reflective liquid crystal light valve or digital micro-mirror in the present embodiment；
Combiner device 15 is X prism or TIR prism in the present embodiment.
Pass through standard respectively in red laser module 1, green (light) laser module 2,3 output end laser of blue laser module
Straight Shaping Module and light guide are incident on light valve 12,13,14, and digital modulation signals are added separately to light valve by conversion by signal source
12, on 13,14, the red for generating different gray-levels, green, blue figure are controlled respectively by the on-off of light valve 12,13,14
Picture.Tricolor laser after modulated with different gray-levels is combined by combiner device 15 a branch of is incident on imaging lens 19
In, such image three-colo(u)r is just combined into a secondary color image, then color image is projected can be real on the screen 20 of certain distance
Now without speckle laser display.
Embodiment 5
As shown in figure 4, laser display system provided in this embodiment, comprising:
Red laser module 1, green (light) laser module 2, blue laser module 3 export feux rouges, green correspondingly
Light, blue light, feux rouges, green light, the output light path of blue light are respectively different；
The collimating and correcting module 4,5,6 being separately positioned on the output light path of feux rouges, green light, blue light, difference collimating and correcting
Feux rouges, green light, blue light；
The light guide 7,8,9 being separately positioned on the output light path of feux rouges, green light, blue light, after changing collimating and correcting respectively
Feux rouges, green light, blue light light path, light guide 7,8,9 be respectively radial dimension along the multiple gradual change in paths direction light guide；
The reflecting mirror 10,11 being separately positioned on the output light path of feux rouges, blue light, will change feux rouges, the indigo plant of light path respectively
Light is reflected into combiner device；
Feux rouges, green light, blue light synthesis are synthesized light beam by combiner device 15 all the way；
Light valve 21 controls to generate the red of different gray-levels, green, blue image synthesis light beam；
Imaging lens 19 project red, green, blue image on screen 20.
Wherein
Light guide is the coherence for eliminating laser, and then realizes the Primary Component without speckle laser display, light in the present embodiment
Light of the radial dimension led in the multiple gradual change in paths direction, laser can occur randomly to roll over when propagating in the light guide
It penetrates, scatter, the light path of light changes, to change the phase of laser, and then eliminates the coherence of laser.
The laser display system further preferably includes radiating module 16-1,16-2,16-3, temperature control module 17:
Red laser module 1 is fixed on radiating module 16-1, and green (light) laser module 2 is fixed on radiating module 16-2
On, blue laser module 3 is fixed on radiating module 16-3；
Temperature control module 17 controls the heat dissipation capacity of above three radiating module respectively, to control red laser module respectively
1, green (light) laser module 2, the emitted laser of blue laser module 3 wavelength.It can control temperature by temperature control module 17
To adjust wavelength of the laser module under specific output power, especially relatively high power.
The wave-length coverage that red laser module 1 exports laser is 635nm -670nm；The output of green (light) laser module 2 swashs
The wave-length coverage of light is 515nm -530nm；The wave-length coverage that blue laser module 3 exports laser is 440nm -460nm；It is red
Light laser module 1, green (light) laser module 2, blue laser module 3 are multiple including different central wavelengths correspondingly
Red laser unit, multiple green laser units of different central wavelength, different central wavelengths multiple blue laser units, it is more
A red laser unit, multiple green laser units, multiple blue laser units central wavelength cover feux rouges correspondingly
Laser module 1, green (light) laser module 2, the wave-length coverage for exporting laser of blue laser module 3, specifically:
Red laser module 1 includes five red laser units, and the central wavelength of each red laser unit is respectively
635nm, 640nm, 650nm, 660nm, 670nm set gradually collimating and correcting mould on the output light path of red laser module 1
Block 4, light guide 7, reflecting mirror 10, combiner device 15；
Green (light) laser module 2 includes containing three green laser units, and the central wavelength of each green laser unit is respectively
515nm, 520nm, 530nm set gradually collimating and correcting module 5, light guide 8, light on the output light path of green (light) laser module 2
Bundling device 15；
Blue laser module 3 includes three blue laser units, and the central wavelength of each blue laser unit is respectively
440nm, 450nm, 460nm set gradually collimating and correcting module 6, light guide 9, reflection in the output light path of blue laser module 3
Mirror 11, combiner device 15.
Each red laser unit, each green laser unit, each blue laser unit are respectively by laser single pipe or laser
Array composition.
The laser display system further preferably includes laser control module 18, and automatic choosing respectively can be required according to display color
The red laser unit, green laser unit, blue laser unit for selecting suitable central wavelength make it shine, so as to realize ratio
The higher colour gamut covering of the prior art.Such as middle cardiac wave in red laser module 1 is selected by laser control module 18 respectively
The red laser unit of a length of 635nm shines, and the green laser unit that middle cardiac wave is 530nm in green (light) laser module 2 shines,
The blue laser unit that central wavelength is 440nm in blue laser module 3 shines.According to the color requirements of display, in order to aobvious
The part colours that above-mentioned one region of the chromatic triangle left side is not covered in diagram 4, can control by laser control module 18
The green laser unit that central wavelength in green (light) laser module 2 is 515nm shines, and the chromatic triangle newly formed just covers
The part colours region that first chromatic triangle is not covered with, extends the color domain coverage ratio of display.As a same reason,
The coloration that any combination is formed between the laser cell of different central wavelengths in the present embodiment in red, green, blue laser module
Triangle covered color region be all the present embodiment a kind of covered color gamut of laser display system institute, thus
Significantly improve color domain coverage ratio.
Collimating and correcting module 4,5,6 is respectively non-spherical lens, cylindrical lens or spherical lens in the present embodiment.
Light valve 21 is transmission liquid crystal light valve, reflective liquid crystal light valve or digital micro-mirror in the present embodiment；
Combiner device 15 is X prism or TIR prism in the present embodiment.
It is whole by collimating in red laser module 1, green (light) laser module 2,3 output end laser of blue laser module
After shape module and light guide by combiner device 15 synthesize it is a branch of be incident on light valve 21, signal source believes digital modulation by conversion
It number is added on the light valve 21 to red, green, blue tricolor laser time division modulation, is controlled by the on-off of light valve 21 and generate different ashes
The red, green, blue image for spending level are incident on imaging lens system 19, then tristimulus image are projected certain distance
Screen 20 on no speckle can be realized show.It is spaced since the visual persistence effect and tricolor laser module of human eye shine
The far smaller than distinguishable time interval of human eye is just combined into a secondary color image by the image three-colo(u)r of eye-observation, realizes without scattered
Spot laser display.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (3)
1. a kind of light guide, which is characterized in that the radial dimension of the light guide is along the multiple gradual change in paths direction；The light guide is light
Lead rod or optical fiber, the transformation range of the radial dimension of the optical rod are as follows: 0.1mm to 10cm；The diameter of the optical fiber
To the transformation range of size are as follows: 0.01 μm to 10 μm.
2. a kind of laser light source, including at least one laser module and positioned at least the one of corresponding laser module output light path
A light guide, which is characterized in that the radial dimension of the light guide is along the multiple gradual change in paths direction；The light guide be optical rod or
Optical fiber, the transformation range of the radial dimension of the optical rod are as follows: 0.1mm to 10cm；The radial dimension of the optical fiber
Transformation range are as follows: 0.01 μm to 10 μm.
3. a kind of laser display system, which is characterized in that the system includes:
Red laser module, green (light) laser module, blue laser module, multiple collimating and correcting modules, multiple light guides, light
Valve, combiner device, imaging lens,
Standard is arranged in sequence on the output light path of the red laser module, green (light) laser module and blue laser module
Straight Shaping Module and light guide；Three beams of laser after the light guide first passes around the light valve in itself optical path, then passes through institute
Combiner device is stated, or first passes around the combiner device, subsequently into same light valve, is projected by the imaging lens,
The multiple light guide is respectively light guide of the radial dimension along the multiple gradual change in paths direction；The multiple light guide is respectively
Optical rod or optical fiber, the transformation range of the radial dimension of the optical rod are as follows: 0.1mm to 10cm；The optical fiber
The transformation range of radial dimension are as follows: 0.01 μm to 10 μm.
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| CN111381416B (en) * | 2018-12-29 | 2021-10-22 | 深圳光峰科技股份有限公司 | Display system |
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Denomination of invention: Optical waveguide, laser light source, and laser display system Effective date of registration: 20230921 Granted publication date: 20190614 Pledgee: China Construction Bank Corporation Hangzhou Qiantang sub branch Pledgor: HANGZHOU ZHONGKE AURORA TECHNOLOGY Co.,Ltd. Registration number: Y2023330002078 |