CN209281094U - Laser projection optics module and laser projection device - Google Patents

Abstract

The utility model discloses a kind of laser projection optics module, including shell, vibration device, actuator, optical fiber and relaying microscope group inside the shell is encapsulated；Before being with laser projection optics module beam projecting direction, vibration device is fixed on the inside of outer casing back, the both ends of actuator are respectively fixing end and free end, fixing end is fixed on vibration device, optical fiber is fixed on the actuator and one end beyond the free end of actuator forms optical fiber cantilever, the relaying microscope group is variable focus lens package or long-focal-depth lens group, is encapsulated in case nose and is located in the light optical path out of optical fiber.The utility model provides a kind of completely new laser projection optics module with dissipation spot function, laser-projector or laser television using the laser projection optics module, it does not need to cooperate special screen that good display effect can be realized, the hardware cost of laser-projector or laser television can be effectively reduced, conducive to the large-scale production of laser television.

Description

Laser projection optics module and laser projection device

Technical field

The utility model relates to laser display fields more particularly to a kind of laser projection optics module and laser projection to set It is standby.

Background technique

Laser display technology is the display technology using red, green, blue tricolor laser as light source, as a new generation's display Technology not only inherits all advantages of digital display technique, but also color domain coverage ratio is up to the recognizable color space of human eye 90%, color that can be most abundant, gorgeous with true reappearance objective world provides the expressive force more shaken, thus be considered as The revolution of display field.

However, due to the high coherence of laser light source, the laser projection as light source on the screen when, between scattered beam Interference will lead to and generate the bright blackening point of random distribution a kind of, i.e. laser speckle in projection image planes.Speckle there are serious The image quality for affecting display picture, reduces image resolution ratio and contrast, becomes one of laser projection display development Significant obstacle.Therefore, the influence that must cut down speckle noise in laser display design as much as possible, only effectively inhibits scattered Spot, laser display technology are possible to become the mainstream of display industry of new generation.

Currently, have proposed a variety of solutions both at home and abroad around speckle issue, for example, introduce in the optical path rotating diffuser plate, Or rotating optical element, vibrating mirror, random phase piece etc.；For example increase the breadth of spectrum line of light source again；It is superimposed by pulse laser Mode etc..

What it is to numerous dissipation spot scheme Successful utilizations is that Mitsubishi in 2007 is showing a large-size screen monitors released in the market Curtain laser television, the video screen color rendering domain are twice wider than liquid crystal display panel.The dissipation spot scheme of the laser television is adopted Be exactly the method for moving screen, the screen being made up of two scatterers being located next to, one of screen fixes, another Small movements are done next to the screen of fixed mask, in this way due to the movement of screen, so that the speckle in display image is folded Add, due to the persistence effect of human eye, observer is with regard to the speckle on imperceptible screen, i.e., by planar Rotation screen to protect Screen persistent movement is held to be superimposed speckle pattern, reduces the influence of speckle.Two pieces of screens are needed in the system, both increase cost Main screw lift is affected again, and needs biggish driving force and increases power consumption, and practical operability is not strong.And shield in movement In curtain dissipation spot method, light is dispersed on movement screen and directly reaches fixed mask, if the scattering angle of scatterer compares optical path The numerical aperture or f-number of middle lens are big, and a part of light just will loss.Additionally, due to needing to consider television set appearance, again The problems such as amount, reliability, service life and noiseless, and with the development of large-size screen monitors TV, video screen size becomes greatly, shake screen For curtain scheme in the case where meeting above-mentioned requirements, screen construction design difficulty is very big, and also the laser of Mitsubishi is big Just because of this Screen television is expensive, can only walk high-end consumption route, cannot produce in enormous quantities.

And the slightly lower laser television of price on the market at present, it does not use three color laser instead of generally, is swashed using monochromatic Light or two-color laser are excited into three colors by fluorescent powder, since fluorescent powder excites wide spectrum itself the speckle effect very little generated, And the even mating plate of rotation would generally be used inside the equipment of this structure, can further dissipate spot, therefore they do not need above The shake screen mentioned, it is only necessary to common anti-light curtain, advantage of lower cost, but display effect swashs far away from real three color Photoelectricity view, actually colour gamut and contrast are all far short of what is expected compared to real three colors laser.

How in the way of low cost, dissipation spot is realized, it has also become the technical problem that laser display field must overcome.

Utility model content

The purpose of the utility model is to provide a kind of laser projection optics modules, realize dissipation spot with the mode of low cost.

In order to realize above-mentioned purpose of utility model, the utility model provides a kind of laser projection optics module, including outer Shell encapsulates vibration device, actuator, optical fiber and relaying microscope group inside the shell；With laser projection optics module beam projecting side Xiang Weiqian, vibration device are fixed on the inside of outer casing back, and the both ends of actuator are respectively fixing end and free end, and fixing end is fixed On vibration device, optical fiber is fixed on the actuator and one end beyond the free end of actuator forms optical fiber cantilever, the relaying Microscope group is variable focus lens package or long-focal-depth lens group, is encapsulated in case nose and is located in the light optical path out of optical fiber.

Preferably, the vibration device is motor or causes one of shape-changing material system by piezo-electric crystal, changes of magnetic field material, field At vibration device.

Preferably, the vibration device is piezoelectric actuator flexible along the longitudinal direction, when piezoelectric actuator works, is driven The actuator vibrates along the longitudinal direction.

Preferably, vibration frequency f >=30Hz of the vibration device, Oscillation Amplitude A≤100 μm.

Preferably, the vibration frequency f range of the vibration device are as follows: 200Hz >=f >=30Hz, Oscillation Amplitude A range are as follows: 15μm≤A≤100μm。

Preferably, the actuator includes the first actuation part and the second actuation part, and the first actuation part can drive the second cause Dynamic portion is vibrated with first direction, and the second actuation part can be vibrated with second direction, and optical fiber cantilever is finally driven with first direction It is swept on the compound direction of second direction.

Preferably, second actuation part is piezoelectric actuator.

Preferably, first actuation part is motor or causes one of shape-changing material by piezo-electric crystal, changes of magnetic field material, field Manufactured actuator.

Preferably, laser light source and bundling device are also packaged in shell, the light beam that the laser light source generates is through bundling device Optical fiber is coupled into after closing beam.

Preferably, the laser light source includes at least tri- color laser light source of R, G, B.

Preferably, internal components are encapsulated using vacuum mode in shell.

Correspondingly, the utility model also provides a kind of laser projection device, the laser projection device includes at least one set Above-mentioned any laser projection optics module.

Compared with prior art, the utility model has the following beneficial effects:

The utility model provides a kind of completely new laser projection optics module with dissipation spot function, using the laser The laser-projector of projection optics mould group or laser television do not need to cooperate special screen that good display effect, energy can be realized The hardware cost of laser-projector or laser television is effectively reduced, conducive to the large-scale production of laser television.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, is also possible to obtain other drawings based on these drawings:

Fig. 1 is a kind of structural schematic diagram of one laser projection optics module of the utility model embodiment；

Fig. 2 is another structural schematic diagram of one laser projection optics module of the utility model embodiment；

Fig. 3 is the structural schematic diagram of the external laser light source of Fig. 1 laser projection optics module；

Fig. 4 is a kind of structural schematic diagram of the utility model embodiment dual-laser projection optics mould group；

Fig. 5 is a kind of structural schematic diagram of three laser projection optics module of the utility model embodiment；

Fig. 6 is the structural schematic diagram of the external laser light source of Fig. 5 laser projection optics module；

Fig. 7 is a kind of structural schematic diagram of four laser projection optics module of the utility model embodiment；

Fig. 8 is the structural schematic diagram one of actuator in the utility model embodiment；

Fig. 9 is the structural schematic diagram two of actuator in the utility model embodiment；

Figure 10 is the schematic diagram for splicing laser projection optics modules multiple in Fig. 1；

Figure 11 is the schematic diagram for splicing laser projection optics modules multiple in Fig. 4；

Figure 12 is the schematic diagram for splicing laser projection optics modules multiple in Fig. 5；

Figure 13 is the utility model embodiment laser projection device schematic diagram.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, fall within the protection scope of the utility model.

" laser projection optics module " in the utility model embodiment is referred to as " fibre optic scanner ".

Embodiment one:

Referring to Fig. 1 to Fig. 3, the present embodiment laser projection optics module, including outer 101, the actuating being encapsulated in shell 101 Device 102, optical fiber and relaying microscope group 105；The both ends of actuator 102 are respectively fixing end and free end, in Fig. 1 example, braking The fixing end of device 102 passes through the rear inside that fixed bracket 107 is fixed on shell 101, and optical fiber is fixed on the actuator and one end Free end beyond actuator forms optical fiber cantilever 104, and the optical fiber other end 103 is beyond outer casing back as light input end；To swash Light projection optics mould group beam projecting direction is front, and the opposite one end in light end is rear end out, i.e. in Fig. 1, before arrow direction is, Relaying microscope group 105 is encapsulated in the front end of shell 101 and is located in the light optical path out of optical fiber；In the rear end of shell 101, it is provided with energy Drive the vibration device 106 of entire laser projection optics module vibration.Relaying microscope group in the utility model embodiment is according to real Demand is implemented on border, can be designed as having the function of one of collimation, imaging, amplification, even light, focusing etc. or multiple functions.? In Fig. 1 example, the outside of 101 rear end of shell is arranged in vibration device 106, and in the specific implementation, vibration device 106 can also be by It is arranged according to mode shown in Fig. 2, i.e., for 106 a part of vibration device beyond on the outside of rear end, the mode of a part insertion outer casing back is real It applies, applicant does not limit how vibration device is specifically arranged herein, as long as vibration device 106 is able to drive entire laser and throws The vibration of shadow optics module.

In the present embodiment, vibration device 106 and brake 102 can be respectively independent device, may be designed in one Forming structure.When vibration device 106 and brake 102 are integrally formed, in the utility model embodiment, 101 envelope of shell When dress, so that the leakage of 106 part of vibration device is on the outside of 101 rear end of shell.

The optical fiber other end 103 beyond outer casing back as light input end, when in use, can be with other optics such as laser light source The light-coming out optical fiber of device links together, and is the schematic diagram of the external laser light source of Fig. 1 laser projection optics module, laser such as Fig. 3 Light source 201 includes tri- color laser of R, G, B, after three color laser close beam by bundling device 301, inputs the laser projection optics in Fig. 1 Mould group, the output optical fibre of bundling device 301 connect 103 end of optical fiber, and optical fiber splicer operation, vibration can be used in the connection between optical fiber Device 106 is preferably vibrated according to the front-rear direction of arrow instruction.

Speckle is substantially the redistributed power as caused by interference effect, and interference term is mechanical periodicity at any time Amount, what human eye perceived is the integral in the interference term human eye time of integration, in the utility model embodiment, due to vibration device 106 drive entire laser projection optics module vibration, due to the visual persistence effect of human eye, when can not accurately differentiate some The speckle pattern at quarter, in the case where the vibration of laser projection optics module, human eye is received specific as caused by speckle pattern Dimensional energy distribution, it will due to this vibration change and generate homogenized effect, be finally reached decrease even eliminate speckle Purpose.

Embodiment two:

Referring to fig. 4, the laser projection optics module in the present embodiment and the laser projection optics module in Fig. 1~3 are distinguished Be: Fig. 4 embodiment is all encapsulated into laser light source 201 and bundling device 301 in shell 101, and actuator 102 passes through fixed branch Frame 107 is fixed in the middle part of shell, and the laser light source 201 includes at least tri- color laser light source of R, G, B, and laser light source 201 generates Light beam through bundling device 301 close beam after be coupled into optical fiber, be emitted by optical fiber cantilever 104, vibration device 106 equally drives entire laser The vibration of projection optics mould group.Preferably, the laser light source includes at least tri- color laser light source of R, G, B.

Embodiment three:

Referring to figs. 5 and 6, laser projection optics module shown in the present embodiment includes shell 101, is encapsulated in shell 101 Interior vibration device 106, actuator 102, optical fiber and relaying microscope group 105；It is with laser projection optics module beam projecting direction Before, the opposite one end in light end is rear end out, and vibration device 106 is fixed on the inside of outer casing back, in Fig. 9 example, vibration device 106 are fixed on the rear inside of shell 101 by fixed bracket 107, and the both ends of actuator 102 are respectively fixing end and freedom End, fixing end are fixed on vibration device 106, and optical fiber is fixed on the free end that on actuator 102 and one end exceeds actuator 102 Optical fiber cantilever 104 is formed, for the optical fiber other end beyond outer casing back as light input end, the relaying microscope group 105 is zoom lens Group or long-focal-depth lens group are encapsulated in case nose and are located in the light optical path out of optical fiber.

Fig. 6 is the structural schematic diagram of Fig. 5 laser projection optics module external laser light source and bundling device.

The difference between this embodiment and the first embodiment lies in: in embodiment one, what vibration device 106 drove is that entire laser is thrown The vibration of shadow optics module, and in the present embodiment, for vibration device 106 due to installation site difference, what is directly driven is actuator 102 vibrations, and then drive optical fiber cantilever 104 to vibrate indirectly.Since vibration main body is changed, in the present embodiment, relay lens Group 105 is necessary for variable focus lens package or long-focal-depth lens group, and in example 1 and example 2, relaying microscope group can not have Standby zoom function.When relaying microscope group 105 using zoom lens in the utility model embodiment, by Zoom control, so that no matter Scanning optical fiber goes out how light end changes at a distance from relaying microscope group, can focus always on the screen.And microscope group is relayed using focal length Deep and thorough mirror, when scanning image planes generation minor change at a distance from relaying microscope group that optical fiber scans out, the image on screen is impacted It is smaller.

Example IV:

The laser projection optics module area in laser projection optics module and Fig. 5 and Fig. 6 referring to Fig. 7, in the present embodiment Be not: Fig. 7 embodiment is all encapsulated into laser light source 201 and bundling device 301 in shell 101, and actuator 102 passes through fixation Bracket 107 is fixed in the middle part of shell, and laser light source 201 includes at least tri- color laser light source of R, G, B.Other parts and Fig. 5 are implemented Example is consistent, i.e., 106 same drive actuators 102 of vibration device and optical fiber cantilever fixed thereon 104 vibrate, and relays microscope group 105 are necessary for variable focus lens package or long-focal-depth lens group.

In embodiment three and example IV, vibration device 106 and brake 102 can be respectively independent device, can also It is an integral molding structure with design.

The different structure of four embodiments of laser projection optics module is described above in conjunction with Fig. 1-7, it below will be to above-mentioned The common part of four embodiments is described.

In above-mentioned all embodiments, vibration device 106 all can be vibrating motor or by piezo-electric crystal, changes of magnetic field material Material, field cause vibration device made of the materials such as shape-changing material, electrostriction material, pass through motor driven, electrostriction, Magnetic driving Etc. modes realize and vibrate in one or more directions, so that entire laser projection optics module be driven to vibrate.

In the preferred embodiment of above-mentioned all embodiments, the vibration device 106 preferably use is stretched along the longitudinal direction Piezoelectric actuator drives the laser projection optics module to vibrate along the longitudinal direction, i.e. Piezoelectric Driving when piezoelectric actuator works Device works in " d33 mode ", and " d33 mode " refers to thickness (t) the direction elongation when extra electric field E and polarization intensity P are in the same direction；E/P When reversed, thickness (t) direction is shortened.The vibration frequency of vibration device 106 is preferably higher than according to the identifiable object of human eye The vibration frequency that the upper limit of movement speed defines.It is well known that human eye visually identifies velocity interval equal to or less than 30Hz Object.Therefore, the vibration frequency of vibration device 106 is preferably greater than or equal to 30Hz.It is set to reduce laser projection optics module Meter volume and power consumption, the Oscillation Amplitude of vibration device 106 are preferably controlled in 100 μm.It is furthermore preferred that the utility model embodiment The vibration frequency f range of vibration device are as follows: 200Hz >=f >=30Hz, Oscillation Amplitude A range are as follows: 15 μm≤A≤100 μm.

Brake 102 in above-mentioned all embodiments can be helical scanning actuator, or grid scanning actuating Device, the utility model to actuator structure with no restrictions.

Since laser projection imaging field image source is typically all rectangular area, the scanning mode of screw type is lacked there are many Point, such as: it is not easy to match with image source, pixel utilization rate is not high etc., therefore the utility model embodiment preferably uses grid Formula scan actuator, specifically: the actuator includes the first actuation part and the second actuation part, and the first actuation part can drive the Two actuation parts are vibrated with first direction, and the second actuation part can be vibrated with second direction, and optical fiber cantilever is finally driven with first It is swept on the compound direction of direction and second direction.It is preferred that first direction and second direction are vertical, one scans for X-direction, one It is a to be scanned for Y-direction.It is driven in addition, Piezoelectric Driving, motor driven or magnetic can be respectively adopted in the first actuation part and the second actuation part The driving methods such as dynamic, herein with no restrictions.Such as first actuation part and the second actuation part can be respectively by motor or by piezo crystals Body, changes of magnetic field material, field cause one of shape-changing material to be made.First actuation part and the second actuation part can be individual component, two Person is combined by bonding, clamping or connector；First actuation part and the second actuation part may be integrated formed structure, Herein with no restrictions.In order to enable actuator structure is easy to understand, it is below citing with Fig. 8 and Fig. 9.In Fig. 8 and Fig. 9, label 1021 indicate the first actuation part, and label 1022 indicates the second actuation part, and label 104 is optical fiber cantilever, and label 1023 is interconnecting piece Or isolation part, in Fig. 8, the first actuation part and the second actuation part are seperated clamping design, and Fig. 9 is the first actuation part and the second actuating Portion is integrally formed design.

In the utility model embodiment, since optical fiber itself is very light, drive the actuator volume of optical fiber scanning that can be made It is very small, therefore entire laser projection optics module volume and weight can be accomplished very small, vibration device driving is entire to swash The vibration of light projection optics mould group, the power consumption needed can also be very low.

In above-mentioned all embodiments, the actuator, optical fiber and relaying microscope group are preferably encapsulated using vacuum mode in shell Equal internal components.

In laser projection, it is often necessary to which multiple fibre optic scanners (laser projection optics module) are spliced.When work, often The vibration device of a fibre optic scanner can either synchronously or asynchronously (i.e. same frequency or different frequency, with amplitude or various amplitude) carry out It is vibrated on one or more directions, realizes the function of dissipation spot.Figure 10 is illustrated that laser projection optics modules multiple in Fig. 1 The schematic diagram of splicing, wherein 400 be the common fixed part of each fibre optic scanner, the vibration device 106 of each fibre optic scanner It is fixed on fixed part 400.Figure 11 is illustrated that the schematic diagram of laser projection optics modules multiple in Fig. 4 splicing, and Figure 12 Illustrate that the schematic diagram for splicing laser projection optics modules multiple in Fig. 5.

Laser projection optics module in embodiment one and embodiment three, compared to the laser in embodiment two and example IV Projection optics mould group, due to the unencapsulated laser light source of module internal, thermal diffusivity is more preferable.Simultaneously because laser projection optics module It remaining and most simplifies structure, volume and weight is smaller, and it is lower to the driving force request of vibration device, it realizes and imitates convenient for volume production Fruit guarantees.Certainly, when the relaying microscope group in embodiment three and example IV selects variable focus lens package, compared to one He of embodiment Two, control difficulty increases.Therefore, embodiment one is the best embodiment of the utility model.

The laser projection optics module of the utility model embodiment is suitable for laser projection device, in laser projection device In, the laser projection optics module of one or more groups of the utility model embodiments can be used.As shown in figure 13, it is set for laser projection For schematic diagram, the utility model laser projection optics module 100 is used in ray machine mould group in laser-projector 500, due to this reality Has a dissipation spot function with new pattern laser projection optics mould group 100, therefore projection screen 600 can be common anti-light curtain or even general Logical projector curtain.

The utility model provides a kind of completely new laser projection optics module with dissipation spot function, using the laser The laser-projector of projection optics mould group or laser television do not need to cooperate special screen that good display effect, energy can be realized The hardware cost of laser-projector or laser television is effectively reduced, conducive to the large-scale production of laser television and universal.

All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive Feature and/or step other than, can combine in any way.

Any feature disclosed in this specification (including any accessory claim, abstract and attached drawing), except non-specifically chatting It states, can be replaced by other alternative features that are equivalent or have similar purpose.That is, unless specifically stated, each feature is only It is an example in a series of equivalent or similar characteristics.

The utility model is not limited to specific embodiment above-mentioned.The utility model expands to any in this specification The new feature of middle disclosure or any new combination, and disclose any new method or process the step of or any new group It closes.

Claims (12)

1. a kind of laser projection optics module, which is characterized in that including shell, encapsulate vibration device inside the shell, actuator, Optical fiber and relaying microscope group；Before being with laser projection optics module beam projecting direction, vibration device is fixed on the inside of outer casing back, The both ends of actuator are respectively fixing end and free end, and fixing end is fixed on vibration device, optical fiber it is fixed on the actuator and One end beyond actuator free end formed optical fiber cantilever, the relaying microscope group be variable focus lens package or long-focal-depth lens group, It is encapsulated in case nose and is located in the light optical path out of optical fiber.

2. laser projection optics module as described in claim 1, which is characterized in that the vibration device is for motor or by piezoelectricity Crystal, changes of magnetic field material, field cause vibration device made of one of shape-changing material.

3. laser projection optics module as described in claim 1, which is characterized in that the vibration device is to stretch along the longitudinal direction The piezoelectric actuator of contracting drives the actuator to vibrate along the longitudinal direction when piezoelectric actuator works.

4. laser projection optics module as claimed in claim 2 or claim 3, which is characterized in that the vibration frequency f of the vibration device >=30Hz, Oscillation Amplitude A≤100 μm.

5. laser projection optics module as claimed in claim 4, which is characterized in that the vibration frequency f model of the vibration device It encloses are as follows: 200Hz >=f >=30Hz, Oscillation Amplitude A range are as follows: 15 μm≤A≤100 μm.

6. such as the described in any item laser projection optics modules of claim 1,2,3,5, which is characterized in that the actuator includes First actuation part and the second actuation part, the first actuation part can drive the second actuation part to vibrate with first direction, the second actuation part It can be vibrated with second direction, optical fiber cantilever is finally driven to sweep on first direction and the compound direction of second direction.

7. laser projection optics module as claimed in claim 6, which is characterized in that second actuation part is Piezoelectric Driving Device.

8. laser projection optics module as claimed in claim 7, which is characterized in that first actuation part is for motor or by pressing Transistor, changes of magnetic field material, field cause actuator made of one of shape-changing material.

9. such as the described in any item laser projection optics modules of claim 1,2,3,5,7,8, which is characterized in that also sealed in shell Equipped with laser light source and bundling device, the light beam that the laser light source generates is coupled into optical fiber after bundling device closes beam.

10. laser projection optics module as claimed in claim 9, which is characterized in that the laser light source includes at least R, G, B Three color laser light sources.

11. such as the described in any item laser projection optics modules of claim 1,2,3,5,7,8,10, which is characterized in that in shell Internal components are encapsulated using vacuum mode.

12. a kind of laser projection device, which is characterized in that the laser projection device include it is at least one set of as claim 1 to 11 described in any item laser projection optics modules.