CN105116485A - Light guide, laser source and laser display system - Google Patents
Light guide, laser source and laser display system Download PDFInfo
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- CN105116485A CN105116485A CN201510645530.6A CN201510645530A CN105116485A CN 105116485 A CN105116485 A CN 105116485A CN 201510645530 A CN201510645530 A CN 201510645530A CN 105116485 A CN105116485 A CN 105116485A
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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)
- Mechanical Optical Scanning Systems (AREA)
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Abstract
The invention discloses a light guide, a laser source and a laser display system. The laser source comprises at least one laser module and at least one light guide positioned at an output light path of the corresponding laser module, the radial size of the light guide is gradually changed by multiple times along a light path, the light path of laser emitted from the laser module is changed after the laser enters the light guide, thus eliminating coherence of the laser. The technical solution in the invention can be widely applied to various laser display systems, and has effects of inhibiting a speckle spot phenomenon in the laser display system, improving picture quality, improving brightness, uniformity and color saturation of a picture, and enhancing viewing comfort of the picture.
Description
Technical field
The present invention relates to laser display field.More specifically, photoconduction, LASER Light Source and laser display system is related to.
Background technology
Laser has high brightness, and therefore laser display more easily reaches the large screen display of human eye geometry resolving limit; Laser is line spectrum, and the spectrum width as laser is 5nm, and existing display light spectral width is 40nm, and the number of colours that so laser display can present improves about 500 times than existing display, and therefore laser display can realize two high definition; Laser has higher color saturation simultaneously, the chromatic triangle area of formation can be made large as far as possible by selecting the three primary colours wavelength close to colourity vertex angle, display nature more truly, abundanter color, true 3-D display can be realized by laser holography.Therefore, laser display is the developing direction of following display technique.But due to the strong coherence of laser, can form speckle noise during imaging, make gradation of image acute variation, the detailed information of hidden image, affects image quality, reduce sharpness and the resolution of image, so need to control speckle.The impact how weakening speckle noise is the problem that people study always.Many Scientific Research Workers propose the method reducing speckle contrast, as utilized the light illumination of different wave length to reduce laser coherence, thus suppress speckle; Utilize the methods such as the superposition of pulse laser, mobile scatterer to suppress speckle.Although these methods reduce the impact of speckle, system is comparatively complicated.
Denomination of invention: the laser display system of dissipation spot, the application for a patent for invention of publication number: CN104345470A discloses a kind of by adding light guide plate module to destroy the coherence of laser in laser light source module and display module, thus eliminate the device of speckle, but its light guide plate module adopted for adding light-scattering material particle and making in acryl plates casting cycle, there is Railway Project in this light guide plate module, first can make laser form a lot of reflection for the light-scattering material particle in this light guide plate module, thus reduce the luminous power exported, second is acryl plates non-refractory, 3rd is the complex manufacturing technology of this light guide plate module, so this device is not suitable for putting into production in a large number.
Therefore, need to provide a kind of photoconduction, LASER Light Source and laser display system.
Summary of the invention
The object of the present invention is to provide a kind of photoconduction, LASER Light Source and laser display system, photoconduction and LASER Light Source can be widely used in various laser display system, suppress the speckle phenomena in laser display system, improve image quality, improve the brightness of picture, uniformity coefficient and color saturation, improving picture view and admire comfort level.
For achieving the above object, the present invention adopts following technical proposals:
A kind of photoconduction, the radial dimension of this photoconduction is along the repeatedly gradual change of paths direction.
Preferably, photoconduction is optical rod, and the transformation range of the radial dimension of optical rod is: 0.1mm to 10cm.
Preferably, photoconduction is light transmitting fiber, and the transformation range of fibre-optic radial dimension is: 0.01 μm to 10 μm.
A kind of LASER Light Source, comprise at least one laser module and at least one photoconduction being positioned at corresponding laser module output light path, the radial dimension of photoconduction is along the repeatedly gradual change of paths direction.
Preferably, photoconduction is optical rod, and the transformation range of the radial dimension of optical rod is: 0.1mm to 10cm.
Preferably, photoconduction is light transmitting fiber, and the transformation range of fibre-optic radial dimension is: 0.01 μm to 10 μm.
A kind of laser display system, this system comprises:
Red laser module, green (light) laser module, blue laser module, multiple collimating and correcting module, multiple photoconduction, light valve, combiner device, imaging lens,
On the output light path of red laser module, green (light) laser module and blue laser module, all order arranges collimating and correcting module and photoconduction; First three beams of laser after photoconduction passes through the light valve in self light path, then through combiner device, or first through combiner device, then enters same light valve, is projected by imaging lens,
Described multiple photoconduction is respectively the photoconduction of radial dimension repeatedly gradual change along paths direction.
Preferably, multiple photoconduction is respectively optical rod, and the transformation range of the radial dimension of optical rod is: 0.1mm to 10cm.
Preferably, multiple photoconduction is respectively light transmitting fiber, and the transformation range of fibre-optic radial dimension is: 0.01 μm to 10 μm.
Beneficial effect of the present invention is as follows:
Technical scheme of the present invention can be widely used in various laser display system, compared to existing laser display system, the speckle phenomena in laser display system can be suppressed, improve image quality significantly, improve the brightness of picture, uniformity coefficient and color saturation, improving picture view and admire comfort level, and the manufacturing process of technical scheme of the present invention is simple, with low cost, suitablely puts into production in a large number.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 illustrates the structural representation of embodiment 1.
Fig. 2 illustrates the structural representation of embodiment 3.
Fig. 3 illustrates the structural representation of embodiment 4.
Fig. 4 illustrates the structural representation of embodiment 5.
Embodiment
In order to be illustrated more clearly in the present invention, below in conjunction with preferred embodiments and drawings, the present invention is described further.Parts similar in accompanying drawing represent with identical Reference numeral.It will be appreciated by those skilled in the art that specifically described content is illustrative and nonrestrictive, should not limit the scope of the invention with this below.
The invention provides a kind of photoconduction, containing this photoconduction LASER Light Source and laser display system,
First be a kind of photoconduction, the radial dimension of this photoconduction along the repeatedly gradual change of paths direction, repeatedly fading to here: descending and ascendingly repeatedly to change or ascending and descendingly repeatedly to change.Before this photoconduction is used in lasing light emitter or laser display system, the shape of its radial dimension repeatedly gradual change along paths direction completes.This photoconduction can be applicable to the various lasing light emitter such as semiconductor laser light source, all-solid state laser source, is arranged on the output light path of laser instrument by this photoconduction.
Next is the LASER Light Source containing this photoconduction, at least one laser module of LASER Light Source and at least one this photoconduction being positioned at corresponding laser module output light path.Atom-exciting gives off photon, and the laser molecular photon queue that is exactly these light (or can be regarded as beam of laser be made up of light), photon in laser has identical frequency, phase place and polarization state, therefore to have monochromaticity good for laser, good directionality, the features such as coherence is good, and after in laser module, the laser of laser cell injection enters this photoconduction, because the radial dimension of this photoconduction is along the repeatedly gradual change of paths direction, therefore when laser is propagated in this photoconduction, light can occur to reflect randomly, scattering, the light path of light changes, thus change the phase place of light, and then eliminate the coherence of laser.
It is finally the laser display system containing this photoconduction, utilize containing the LASER Light Source of this photoconduction LASER Light Source as this laser display system, be equipped with collimating and correcting module, light valve, imaging lens are first-class, because eliminated the coherence of laser, so the high quality graphic without speckle just can be demonstrated on screen.
Be 5 embodiments of the present invention below.
Embodiment 1
As shown in Figure 1, the photoconduction that the present embodiment provides is a kind of optical rod of reducing, the radial dimension of this optical rod is along the repeatedly gradual change of paths direction, repeatedly fade to: descending and ascendingly repeatedly to change or ascending and descendingly repeatedly to change, the transformation range of the radial dimension of this optical rod is: 0.1mm to 10cm.This optical rod is before being arranged at lasing light emitter or laser display system, and the shape of its reducing completes.
Embodiment 2
The photoconduction that the present embodiment provides is a kind of light transmitting fiber of reducing, this fibre-optic radial dimension is along the repeatedly gradual change of paths direction, repeatedly fade to: descending and ascendingly repeatedly to change or ascending and descendingly repeatedly to change, the transformation range of this fibre-optic radial dimension is: 0.01 μm to 10 μm.This light transmitting fiber is before being arranged at lasing light emitter or laser display system, and the shape of its reducing completes.
Embodiment 3
As shown in Figure 2, the LASER Light Source that the present embodiment provides comprises the photoconduction of laser module and radial dimension repeatedly gradual change along paths direction, and photoconduction is arranged on laser module output light path.Atom-exciting gives off photon, and the laser molecular photon queue that is exactly these light, photon in laser has identical frequency, phase place and polarization state, therefore to have monochromaticity good for laser, good directionality, the features such as coherence is good, and in laser module laser element injection laser enter this photoconduction after, because the radial dimension of this photoconduction is along the repeatedly gradual change of paths direction, therefore can occur when laser is propagated in this photoconduction to reflect randomly, scattering, the light path of laser changes, thus change the phase place of laser, and then eliminate the coherence of laser.Laser module in the present embodiment is semiconductor laser or all solid state laser.
Embodiment 4
As shown in Figure 3, the laser display system that the present embodiment provides comprises:
Red laser module 1, green (light) laser module 2, blue laser module 3, export ruddiness, green glow, blue light correspondingly, and the output light path of ruddiness, green glow, blue light is different respectively;
Be separately positioned on the collimating and correcting module 4,5,6 on the output light path of ruddiness, green glow, blue light, respectively collimating and correcting ruddiness, green glow, blue light;
Be separately positioned on the photoconduction 7,8,9 on the output light path of ruddiness, green glow, blue light, change the light path of the ruddiness after collimating and correcting, green glow, blue light respectively, photoconduction 7,8,9 is respectively the photoconduction of radial dimension repeatedly gradual change along paths direction;
Be separately positioned on the light valve 12,13,14 on the output light path of ruddiness, green glow, blue light, to changing the ruddiness of light path, green glow, blue light control the redness, green, the blue image that produce different gray-level respectively;
Be separately positioned on the catoptron 10,11 on the output light path of redness, blue image, respectively redness, blue image be reflected into combiner device 15
Combiner device 15, synthesizes a road synthesis light beam by redness, green, blue image;
Imaging lens 19, projects redness, green, blue image on screen 20.
Wherein
Photoconduction is the coherence eliminating laser, and then the Primary Component realized without speckle laser display, in the present embodiment, the radial dimension of photoconduction is along the repeatedly gradual change of paths direction, can occur when light in laser is propagated in this photoconduction to reflect randomly, scattering, the light path of light changes, thus change the phase place of laser, and then eliminate the coherence of laser.
This laser display system also 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, and blue laser module 3 is fixed on radiating module 16-3;
Temperature control module 17 controls the heat dissipation capacity of above-mentioned three radiating modules respectively, thus controls the wavelength of red laser module 1, green (light) laser module 2, blue laser module 3 Emission Lasers respectively.The wavelength of each laser module under specific output power, particularly relatively high power can be regulated by control temperature by temperature control module 17.
The wavelength coverage of red laser module 1 Output of laser is 635nm-670nm; The wavelength coverage of green (light) laser module 2 Output of laser is 515nm-530nm; The wavelength coverage of blue laser module 3 Output of laser is 440nm-460nm; Red laser module 1, green (light) laser module 2, blue laser module 3 comprise multiple blue laser unit of multiple red laser unit of different centre wavelength, multiple green laser unit of different centre wavelength, different centre wavelength correspondingly, the centre wavelength of multiple red laser unit, multiple green laser unit, multiple blue laser unit contains the wavelength coverage of Output of laser of red laser module 1, green (light) laser module 2, blue laser module 3 one to one, is specially:
Red laser module 1 comprises five red laser unit, the centre wavelength of each red laser unit is respectively 635nm, 640nm, 650nm, 660nm, 670nm, and the output light path of red laser module 1 sets gradually collimating and correcting module 4, photoconduction 7, catoptron 10, light valve 12, combiner device 15;
Green (light) laser module 2 comprises containing three green laser unit, the centre wavelength of each green laser unit is respectively 515nm, 520nm, 530nm, and the output light path of green (light) laser module 2 sets gradually collimating and correcting module 5, photoconduction 8, light valve 13, combiner device 15;
Blue laser module 3 comprises three blue laser unit, the centre wavelength of each blue laser unit is respectively 440nm, 450nm, 460nm, sets gradually collimating and correcting module 6, photoconduction 9, catoptron 11, light valve 14, combiner device 15 at the output light path of blue laser module 3.
Each red laser unit, each green laser unit, each blue laser unit are made up of laser instrument single tube or laser array respectively.
This laser display system also preferably includes laser control module 18, can require automatically to select the red laser unit of suitable centre wavelength, green laser unit, blue laser unit to make it luminous respectively according to display color, thus the colour gamut covering higher than prior art can be realized.Such as centre wavelength in red laser module 1 is selected to be that the red laser unit of 635nm is luminous respectively by laser control module 18, in in green (light) laser module 2, cardiac wave is the green laser unit luminescence of 530nm, and in blue laser module 3, centre wavelength is the blue laser unit luminescence of 440nm.According to the color requirements of display, chlamydate part colours is not had in order to show region, the above-mentioned chromatic triangle left side one in Fig. 3, the centre wavelength that can be controlled in green (light) laser module 2 by laser control module 18 is that the green laser unit of 515nm is luminous, the chromatic triangle of new composition just covers first chromatic triangle and does not have chlamydate part colours region, extends the color domain coverage ratio of display.As a same reason, the color region that the chromatic triangle that between the laser cell of the different centre wavelengths in the present embodiment in red, green, blue laser module, combination in any is formed can cover is all the color gamut that a kind of laser display system of the present embodiment can cover, thus significantly improves color domain coverage ratio.
In the present embodiment, collimating and correcting module 4,5,6 is respectively non-spherical lens, post 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.
Light valve 12,13,14 is incided respectively through collimating and correcting module and photoconduction at red laser module 1, green (light) laser module 2, blue laser module 3 output terminal laser, digital modulation signals is added on light valve 12,13,14 through conversion by signal source respectively, controls by the break-make of light valve 12,13,14 redness, green, the blue image that produce different gray-level respectively.Being combined into by combiner device 15 with the tricolor laser of different gray-level after modulation a branch ofly incides in imaging lens 19, such image three-colo(u)r is just combined into a secondary coloured image, then the screen 20 coloured image being projected certain distance can realize without speckle laser display.
Embodiment 5
As shown in Figure 4, the laser display system that the present embodiment provides, comprising:
Red laser module 1, green (light) laser module 2, blue laser module 3, export ruddiness, green glow, blue light correspondingly, and the output light path of ruddiness, green glow, blue light is different respectively;
Be separately positioned on the collimating and correcting module 4,5,6 on the output light path of ruddiness, green glow, blue light, respectively collimating and correcting ruddiness, green glow, blue light;
Be separately positioned on the photoconduction 7,8,9 on the output light path of ruddiness, green glow, blue light, change the light path of the ruddiness after collimating and correcting, green glow, blue light respectively, photoconduction 7,8,9 is respectively the photoconduction of radial dimension repeatedly gradual change along paths direction;
Be separately positioned on the catoptron 10,11 on the output light path of ruddiness, blue light, will ruddiness, the blu-ray reflection light inlet bundling device of light path be changed respectively;
Combiner device 15, synthesizes a road synthesis light beam by ruddiness, green glow, blue light;
Light valve 21, controls to synthesis light beam the redness, green, the blue image that produce different gray-level;
Imaging lens 19, projects redness, green, blue image on screen 20.
Wherein
Photoconduction is the coherence eliminating laser, and then the Primary Component realized without speckle laser display, in the present embodiment, the radial dimension of photoconduction is along the repeatedly gradual change of paths direction, can occur when light in laser is propagated in this photoconduction to reflect randomly, scattering, the light path of light changes, thus change the phase place of laser, and then eliminate the coherence of laser.
This laser display system also 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, and blue laser module 3 is fixed on radiating module 16-3;
Temperature control module 17 controls the heat dissipation capacity of above-mentioned three radiating modules respectively, thus controls the wavelength of red laser module 1, green (light) laser module 2, blue laser module 3 Emission Lasers respectively.The wavelength of laser module under specific output power, particularly relatively high power can be regulated by control temperature by temperature control module 17.
The wavelength coverage of red laser module 1 Output of laser is 635nm-670nm; The wavelength coverage of green (light) laser module 2 Output of laser is 515nm-530nm; The wavelength coverage of blue laser module 3 Output of laser is 440nm-460nm; Red laser module 1, green (light) laser module 2, blue laser module 3 comprise multiple blue laser unit of multiple red laser unit of different centre wavelength, multiple green laser unit of different centre wavelength, different centre wavelength correspondingly, the centre wavelength of multiple red laser unit, multiple green laser unit, multiple blue laser unit contains the wavelength coverage of Output of laser of red laser module 1, green (light) laser module 2, blue laser module 3 one to one, is specially:
Red laser module 1 comprises five red laser unit, the centre wavelength of each red laser unit is respectively 635nm, 640nm, 650nm, 660nm, 670nm, and the output light path of red laser module 1 sets gradually collimating and correcting module 4, photoconduction 7, catoptron 10, combiner device 15;
Green (light) laser module 2 comprises containing three green laser unit, and the centre wavelength of each green laser unit is respectively 515nm, 520nm, 530nm, and the output light path of green (light) laser module 2 sets gradually collimating and correcting module 5, photoconduction 8, combiner device 15;
Blue laser module 3 comprises three blue laser unit, the centre wavelength of each blue laser unit is respectively 440nm, 450nm, 460nm, sets gradually collimating and correcting module 6, photoconduction 9, catoptron 11, combiner device 15 at the output light path of blue laser module 3.
Each red laser unit, each green laser unit, each blue laser unit are made up of laser instrument single tube or laser array respectively.
This laser display system also preferably includes laser control module 18, can require automatically to select the red laser unit of suitable centre wavelength, green laser unit, blue laser unit to make it luminous respectively according to display color, thus the colour gamut covering higher than prior art can be realized.Such as centre wavelength in red laser module 1 is selected to be that the red laser unit of 635nm is luminous respectively by laser control module 18, in in green (light) laser module 2, cardiac wave is the green laser unit luminescence of 530nm, and in blue laser module 3, centre wavelength is the blue laser unit luminescence of 440nm.According to the color requirements of display, chlamydate part colours is not had in order to show region, the above-mentioned chromatic triangle left side one in Fig. 4, the centre wavelength that can be controlled in green (light) laser module 2 by laser control module 18 is that the green laser unit of 515nm is luminous, the chromatic triangle of new composition just covers first chromatic triangle and does not have chlamydate part colours region, extends the color domain coverage ratio of display.As a same reason, the color region that the chromatic triangle that between the laser cell of the different centre wavelengths in the present embodiment in red, green, blue laser module, combination in any is formed can cover is all the color gamut that a kind of laser display system of the present embodiment can cover, thus significantly improves color domain coverage ratio.
In the present embodiment, collimating and correcting module 4,5,6 is respectively non-spherical lens, post 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.
Synthesized by combiner device 15 after collimating and correcting module and photoconduction at red laser module 1, green (light) laser module 2, blue laser module 3 output terminal laser and a branch ofly incide light valve 21, digital modulation signals is added on the light valve 21 to red, green, blue tricolor laser time division modulation by the conversion of signal source process, control to produce the redness of different gray-level by the break-make of light valve 21, green, blue image incide on imaging lens system 19, then the screen 20 tristimulus image being projected certain distance can realize showing without speckle.Due to the visual persistence effect of human eye and the luminous spaced far of tricolor laser module much smaller than the human eye distinguishable time interval, be just combined into a secondary coloured image by the image three-colo(u)r of eye-observation, realize without speckle laser display.
Obviously; the above embodiment of the present invention is only for example of the present invention is clearly described; and be not the restriction to embodiments of the present invention; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here cannot give exhaustive to all embodiments, every belong to technical scheme of the present invention the apparent change of extending out or variation be still in the row of protection scope of the present invention.
Claims (9)
1. a photoconduction, is characterized in that, the radial dimension of this photoconduction is along the repeatedly gradual change of paths direction.
2. photoconduction according to claim 1, is characterized in that, described photoconduction is optical rod, and the transformation range of the radial dimension of described optical rod is: 0.1mm to 10cm.
3. photoconduction according to claim 1, is characterized in that, described photoconduction is light transmitting fiber, and the transformation range of described fibre-optic radial dimension is: 0.01 μm to 10 μm.
4. a LASER Light Source, comprise at least one laser module and at least one photoconduction being positioned at corresponding laser module output light path, it is characterized in that, the radial dimension of described photoconduction is along the repeatedly gradual change of paths direction.
5. LASER Light Source according to claim 3, is characterized in that, described photoconduction is optical rod, and the transformation range of the radial dimension of described optical rod is: 0.1mm to 10cm.
6. LASER Light Source according to claim 3, is characterized in that, described photoconduction is light transmitting fiber, and the transformation range of described fibre-optic radial dimension is: 0.01 μm to 10 μm.
7. a laser display system, is characterized in that, this system comprises:
Red laser module, green (light) laser module, blue laser module, multiple collimating and correcting module, multiple photoconduction, light valve, combiner device, imaging lens,
On the output light path of described red laser module, green (light) laser module and blue laser module, all order arranges collimating and correcting module and photoconduction; First three beams of laser after described photoconduction passes through the light valve in self light path, then through described combiner device, or first through described combiner device, then enters same light valve, is projected by described imaging lens,
Described multiple photoconduction is respectively the photoconduction of radial dimension repeatedly gradual change along paths direction.
8. laser display system according to claim 7, is characterized in that, described multiple photoconduction is respectively optical rod, and the transformation range of the radial dimension of described optical rod is: 0.1mm to 10cm.
9. laser display system according to claim 7, is characterized in that, described multiple photoconduction is respectively light transmitting fiber, and the transformation range of described fibre-optic radial dimension is: 0.01 μm to 10 μm.
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| CN105116485B (en) | 2019-06-14 |
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