CN109358467A - A kind of laser light source, light source mode switching method and laser projection device - Google Patents
A kind of laser light source, light source mode switching method and laser projection device Download PDFInfo
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- CN109358467A CN109358467A CN201811368154.0A CN201811368154A CN109358467A CN 109358467 A CN109358467 A CN 109358467A CN 201811368154 A CN201811368154 A CN 201811368154A CN 109358467 A CN109358467 A CN 109358467A
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- laser
- filter plate
- light source
- color filter
- color
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
Abstract
The present invention provides a kind of laser light source, light source mode switching method and laser projection device.Laser light source of the invention, including laser, for generating laser；Fluorescent wheel, for receiving the laser and issuing the fluorescence of at least one color；Filter wheel, and the fluorescent wheel synchronous rotary, including the first color filter plate and the second color filter plate being arranged radially along the filter wheel；Optical path director element is arranged in the optical path between the fluorescent wheel and filter wheel, for the fluorescence guidance of at least one color to be emitted to first color filter plate or the second color filter plate；Wherein, first color filter plate is used to receive the fluorescence of at least one color and exports the light of the first spectral width；Second color filter plate is used to receive the fluorescence of at least one color and exports the light of the second spectral width；And first spectral width is greater than second spectral width, improves the applicability of laser light source.
Description
Technical field
The present invention relates to laser projection display field more particularly to a kind of laser light source, light source mode switching method and swash
Light projecting device.
Background technique
With the continuous progress of science and technology, laser projection device is more next due to the advantages that its colour gamut is extensive, color purity is higher
In more home entertainings and work for having appeared in people.
Currently, generalling use one-wavelength laser in laser projection display apparatus and adding a fluorescent wheel real with a filter wheel is unified
The acquisition of existing red, green, blue three primary colours.Specifically, one-wavelength laser includes at least feux rouges conversion point usually using blue light, on fluorescent wheel
Area, green light conversion subregion and lit transmissive area, corresponding, feux rouges converts subregion and is equipped with feux rouges transition material, and green light converts subregion
Equipped with green light transition material, lit transmissive area is not provided with light conversion material.Blue light illumination inspires corresponding light and turns on fluorescent wheel
The fluorescence of subregion same color, i.e. red fluorescence, green fluorescence are changed, lit transmissive area then transmits blue light, further passes through filter again
Colour wheel carries out colour filter, wherein fluorescent wheel and filter wheel synchronous rotary, and be correspondingly arranged on feux rouges color filter regions, green light color filter regions and
Blue light transmission area.Such as the structural schematic diagram that Fig. 1 is filter wheel, filter wheel includes feux rouges color filter regions 11, green light color filter regions 12 and indigo plant
Transmitance region 13, wherein feux rouges color filter regions 11 are equipped with Red lightscreening plate, are coated with red filter film, can only penetrate red wavelength
Light, and filter the light of other wavelength colors；Green light color filter regions 12 are equipped with green color filter, are coated with green filter film, only
The light of green wavelength can be penetrated, and filter the light of other wavelength colors；Blue light transmission area 11 transmits blue light, and it is thin not to be coated with optical filtering
Film is all-transparent.Red fluorescence, green fluorescence and the blue light of fluorescent wheel outgoing, are respectively radiated to color filter regions 11, color filter regions 12
With transmission area 13, the three primary colours of different application function, i.e. feux rouges, green light and blue light are obtained.
Requirement of the different application functions to color is different, such as demonstration of drawing, and needs to show that picture has higher brightness,
But it is not high for color requirements, and be applied to home theater or back projection TV, then more focus on display color, but most at present
Optical projection system in can not have both the various modes such as highlighted and high color.
Summary of the invention
The present invention provides a kind of laser light sources, and the light of different spectral widths can be obtained using single filter wheel, reach simultaneous
Has the purpose of high brightness and high color both of which.
In a first aspect, the present invention provides a kind of laser light source, including laser, for generating laser；Fluorescent wheel, for connecing
It receives laser and issues the fluorescence of at least one color；Filter wheel, and fluorescent wheel synchronous rotary, including what is be arranged radially along filter wheel
First color filter plate and the second color filter plate；Optical path director element is arranged in the optical path between fluorescent wheel and filter wheel, near
A kind of fluorescence guidance of few color is emitted on the first color filter plate or the second color filter plate.
Wherein, fluorescence of first color filter plate at least one color of receiving light path director element guidance outgoing, and it is defeated
The light of first spectral width out；Fluorescence of second color filter plate at least one color of receiving light path director element outgoing, and
Export the light of the second spectral width；And first spectral width be greater than the second spectral width.
Preferably, the light of the first spectral width is the first spectral width feux rouges that spectral width is greater than the first range wide,
Or spectral width is greater than the first spectral width green light of the second range wide；The light of second spectral width is spectral width less than the
Second spectral width green light of the second spectral width feux rouges or spectral width of three range wides less than the 4th range wide.
Preferably, the light of the first spectral width includes that spectral width is red greater than the first spectral width of the first range wide
Light and spectral width are greater than the second spectral width green light of the second range wide；The light of second spectral width includes spectral width
Spend the second spectral width of the second spectral width feux rouges for being less than third range wide and spectral width less than the 4th range wide
Spend green light
Further, fluorescent wheel includes the phosphor region along excircle distribution and the first transmission area, and phosphor region is for receiving laser simultaneously
Issue the fluorescence of at least one color, the first transmissive region laser.
Further, the second transmission area and third transmission are further respectively had on the circumference of the first color filter plate and the second color filter plate
The laser in area, the outgoing of the first transmission area is guided by optical path director element to the second transmission area and third transmission area.
Further, the first color filter plate is arranged on filter wheel excircle, and the first color filter plate is arranged in the second color filter plate
Inside.
Further, optical path director element includes the first reflecting mirror and the second reflecting mirror；Wherein, the first reflecting mirror can be at
First angle and second angle；When first reflecting mirror is in first angle, the first reflecting mirror receives the fluorescence of at least one color,
And the second reflecting mirror is reflexed to, the second reflecting mirror will be on received fluorescent reflection to the second color filter plate；Second reflecting mirror is in the
When two angles, the fluorescence of at least one color is directly emitted on the first color filter plate.
Preferably, the first transmission area, the second transmission area and third transmission area are glass substrate or diffusion sheet.
Further, which further includes positioning device and the first stepper motor, and optical path director element is mounted on fixed
On the device of position, the first stepper motor for controlling positioning device, make the guidance of optical path director element at least one color fluorescence
It is emitted on the first color filter plate or the second color filter plate.
Second aspect, the present invention provide a kind of laser projection device, further include ray machine including laser light source as above, use
In reception laser light source, and modulate output；Camera lens, the modulated light source for receiving ray machine output is imaged, and is projected
Shadow screen forms projected picture.
The third aspect, the present invention provide a kind of method of laser light source pattern switching, set applied to above-mentioned laser projection
It is standby, comprising the following steps:
Reception pattern switching command；
Close laser；
First step motor control positioning device, makes optical path director element that the fluorescence of at least one color be guided to be emitted to the first filter
On colour table or the second color filter plate；
Start laser.
Laser light source, light source mode switching method and laser projection device provided by the invention, laser light source therein, packet
It includes the laser for generating laser, for receiving laser and issue the fluorescent wheel of at least one color fluorescence, and was used for
The filter wheel of fluorescence is filtered, filter wheel is made of the first color filter plate and the second color filter plate being arranged radially along filter wheel, and first
Color filter plate and the second color filter plate have different optical properties, it can the light of different spectral widths is obtained by filtration, meanwhile, by
Optical path director element between fluorescent wheel and filter wheel is set, realizes the guidance to fluorescent wheel emitting light path, make light according to
It needs to be emitted on the first color filter plate or the second color filter plate.Therefore, the present invention passes through the first filter on filter wheel in the radial direction
Colour table and the design of the second color filter plate structure, cooperate the optical path guiding function of optical path director element, realize single filter wheel and obtain
The purpose of different spectral width light, improves the applicability of laser light source.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of filter wheel in the prior art；
Fig. 2 is the structural schematic diagram for the laser light source that the embodiment of the present invention one provides；
Fig. 3 is the structural schematic diagram for the filter wheel that the embodiment of the present invention one provides；
Fig. 4 is the structural schematic diagram for the fluorescent wheel that the embodiment of the present invention one provides；
Fig. 5 is structural schematic diagram when optical path director element is first state in the embodiment of the present invention one；
Fig. 6 is structural schematic diagram when optical path director element is the second state in the embodiment of the present invention one；
Fig. 7 is the structural schematic diagram of laser projection device provided by Embodiment 2 of the present invention；
Fig. 8 is the flow chart for the laser light source mode switching method that the embodiment of the present invention three provides；
Fig. 9 is the flow chart for second of laser light source mode switching method that the embodiment of the present invention three provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 2 is the structural schematic diagram for the laser light source that the embodiment of the present invention one provides.Fig. 3 is that the embodiment of the present invention one provides
Laser light source in filter wheel structural schematic diagram.As shown in Figures 2 and 3, a kind of laser light source provided in this embodiment, packet
It includes: laser 1, for generating laser；Fluorescent wheel 4, for receiving laser and inspiring the fluorescence of at least one color；Filter wheel
2, and 4 synchronous rotary of fluorescent wheel, including the first color filter plate 21 and the second color filter plate 22 being arranged radially along filter wheel 2；Optical path is led
To element 3, it is arranged in the optical path between fluorescent wheel 4 and filter wheel 2, for the fluorescence guidance of at least one color to be emitted to
On first color filter plate 21 or the second color filter plate 22;Wherein, wherein the first color filter plate 21 is guided for receiving light path director element 3
The fluorescence of at least one color of outgoing, and export the light of the first spectral width；Second color filter plate 22 is oriented to for receiving light path
The fluorescence at least one color that element 3 is emitted, and export the light of the second spectral width；And first spectral width be greater than the
Two spectral widths.
The present embodiment is to provide a kind of laser light source, by the color filter plate of optical filtering performances different on filter wheel, obtain not
With the polychromatic source of spectral width, realizing single colour wheel can produce multi-mode laser light source, improve being applicable in for laser light source
Property.
Specifically, laser 1 can be single laser, or the combination of multiple lasers, multiple lasers hang down
In line column and the laser for issuing at least one color, the present embodiment use single laser, which can issue blue and swash
Light.
Laser 1 issues laser light incident to fluorescent wheel 4.Since the laser beam area that laser 1 itself issues is larger, and
Fluorescence excitation requires lesser light beam, therefore focusing optics 5 is additionally provided between laser 1 and fluorescent wheel 4, so that laser
Light beam becomes smaller, to meet glimmering light activated requirement.
Further, laser is emitted on the fluorescent wheel 4 of periodic rotary, fluorescence after 5 shrink beam of focusing optics
Wheel 4 includes the phosphor region 41 and the first transmission area 42 along excircle distribution, wherein phosphor region 41 is for receiving laser and issuing extremely
A kind of fluorescence of few color, the first transmission area 42 are used for transmission laser.Specifically, required three are imaged in order to provide laser display
Primary light source, phosphor region 41 may include yellow fluorescent powder 4a and green emitting phosphor 4b, and the first transmission area 42 does not include fluorescent powder material
Material.Blue laser beams successively irradiate the outer circumferential area, to successively excite corresponding phosphor region 41, generate green fluorescence and Huang
Color fluorescence, and transmitted away from the first transmission area 42, as shown in Figure 4.When the laser light source is used for lighting system, the laser
The phosphor region 41 of light source can only include yellow fluorescent powder, or only include green emitting phosphor, and equally, the first transmission area 42 does not include
Phosphor material powder.
The spectral region of the green fluorescence and yellow fluorescence that are emitted due to fluorescent wheel 4 is wider, makes the purity of corresponding primary lights
It is poor, it is poor so as to cause the colour gamut of corresponding color.The wide spectrum fluorescence filter that filter wheel 2 is used to for fluorescent wheel 4 being emitted exports
Purity is higher or the higher light of brightness, the relevant parameter of filter wheel 2 determine the spectral characteristic for crossing optical filtering of its outgoing.It needs
Illustrate, it is general that feux rouges is obtained by the filtering yellow fluorescence of filter wheel 2 during light source colour is obtained by filtration, and pass through
Filter wheel 2 filters green fluorescence and obtains green light, and the phosphor region 41 of above-mentioned fluorescent wheel is provided with yellow fluorescent powder 4a, for mentioning
For generating the yellow fluorescence of feux rouges.
Specifically, in the present embodiment, filter wheel 2 and 4 synchronous rotary of fluorescent wheel, including the first color filter plate being disposed radially
21 and second color filter plate 22；The circumferential direction of first color filter plate 21 and the second color filter plate 22 further respectively has the second transmission area and third is saturating
Area is penetrated, the laser of the first transmission area outgoing is guided by optical path director element 3 to the second transmission area and third transmission area.
First color filter plate 21 and the second color filter plate 22 have different colour filter performances respectively, and the first color filter plate 21 is for receiving
The fluorescence of at least one color and the light for exporting the first wide spectrum, the second color filter plate 22 are used to receive the fluorescence of at least one color
And export the light of the second wide spectrum, wherein the first spectral width is greater than the second spectral width.In the present embodiment one, the first colour filter
Plate 21 is used to be obtained by filtration the light compared with wide spectrum, and the second color filter plate 22 is used to be obtained by filtration the light of relatively narrow spectrum.By the spectrum of light
For characteristic it is found that the spectral width of light is narrower, excitation purity is better, on the contrary, spectral width is wider, excitation purity is poorer, but has
Higher brightness.Therefore, the filter wheel 2 in the present embodiment is capable of providing the light source of both of which, by filtering in filter wheel difference
The colour filter of relevant parameter is set on colour table, obtains crossing for corresponding spectral width and filters.
Wherein, above-mentioned optical filter uses F-P(Fabry-Perot) optical filter, the basic principle is that utilizing multiple-beam interference
Phenomenon come realize to light beam transmission and filtering.F-P optical filter is most common spike interference filter, such as to feux rouges
When being filtered with green light, by adjusting the associated arguments of F-P optical filter, make the central wavelength feux rouges or green light of its transmission peaks
One of primary colours central wavelength, meanwhile, the reflectivity at another green light or feux rouges primary color wavelength is sufficiently large, finally by them
It is superimposed, can be obtained the generation feux rouges and green light primary filter for meeting design requirement.By using relevant parameter
Optical filter, and the spectrum threshold of corresponding color light is defined, obtain the higher color of excitation purity that spectral width is less than spectrum threshold
Light, or obtain the higher color of light of brightness that spectral width is greater than spectrum threshold.
Therefore, in the present embodiment, when which is used to provide monochromatic illumination light source, the phosphor region 41 of fluorescent wheel 4
Only further pass through comprising green emitting phosphor 4b for generating yellow fluorescence or green fluorescence comprising yellow fluorescent powder 4a or only
The yellow fluorescence or colour filter fluorescence that optical path director element 3 guides above-mentioned fluorescent wheel 4 to be emitted are emitted to the first of different colour filter performances
On color filter plate 21 or the second color filter plate 22, specifically, the light for the first spectral width that above-mentioned first color filter plate 21 exports is spectrum
Width is greater than the first spectral width of the second range wide greater than the first spectral width feux rouges or spectral width of the first range wide
Spend green light；The light for the second spectral width that above-mentioned second color filter plate 22 exports is that spectral width is less than the second of third range wide
The the second spectral width green light of spectral width feux rouges or spectral width less than the 4th range wide.Since the first spectral width is big
In the second spectral width, therefore the feux rouges that is obtained by filtration of the first color filter plate 21 or green light have preferable brightness, and the second colour filter
The feux rouges or green light that plate 22 obtains have preferable purity, realize the laser light source and provide the purpose of multimode light source.
Above-mentioned the first range and third range is the range centered on feux rouges central wavelength, and the first range is bigger, then
The brightness of feux rouges is preferable, but purity is poor；Third range is smaller, then the brightness of feux rouges is relatively poor, but purity is preferable.Together
Reason, the second range and the 4th range are the range centered on green wavelength, and the second range is bigger, then the brightness of green light is preferable,
But purity is poor；4th range is smaller, then the luminance range of green light, but purity is preferable.Wherein the first range, the second model
Enclose, the selection of third range and the 4th range it is related with the physical structure of optical filter and physical parameter, those skilled in the art
It can be selected according to design requirement, details are not described herein.
In the embodiment, when the laser light source needs to provide three primary light source, laser issues blue laser, fluorescent wheel
4 phosphor regions 41 for including at the same be equipped with yellow fluorescent powder 4a and green emitting phosphor 4b, for generating yellow fluorescence and green fluorescence,
And the direct transmitting blue laser of the first transmission area 42, above-mentioned yellow fluorescence, green are further guided by optical path director element 3
Fluorescence and blue laser are emitted on the first color filter plate 21 and the second color filter plate 22 of different colour filter performances, specifically, above-mentioned
The light of first spectral width of one color filter plate 21 output includes that spectral width is red greater than the first spectral width of the first range wide
Light and spectral width are greater than the second spectral width green light of the second range wide；The second of the above-mentioned output of second color filter plate 22
The light of spectral width includes the second spectral width feux rouges that spectral width is less than third range wide and spectral width less than the
Second spectral width green light of four range wides；And blue laser directly passes through the second color filter plate transmissive and generates blue
Light.Since the first spectral width is greater than the second spectral width, the feux rouges and green light that the first color filter plate 21 is obtained by filtration have
Preferable brightness, and the feux rouges and green light that the second color filter plate 22 is obtained by filtration have preferable purity, realize the laser light source
The purpose of multimode light source is provided.
Specifically, due to laser issues in laser light source laser purity and preferable, above-mentioned the first transmission area of brightness
42 and second transmission area material be glass substrate or diffusion sheet, laser can be directed through, for illuminating or being imaged.
It should be noted that in addition to the second above-mentioned transmission area, red filter area and green filter area, the first color filter plate
21 and second color filter plate 22 can also include other filter areas, e.g. Yellow filter area etc..Specifically, the optical filtering in filter wheel
The quantity in region and the corresponding filter types of each filtered region can be configured and adjust according to actual needs, this
Locate without restriction.
Further, in laser light source provided in this embodiment, the first color filter plate 21 in filter wheel 2 is arranged in filter wheel
On 2 excircle, the inside of the first color filter plate 21 is arranged in the second color filter plate 22.
Switching when further, in order to realize that first color filter plate 21 and the second color filter plate 22 are applied on above-mentioned filter wheel 2,
Optical path director element 3 is additionally provided between fluorescent wheel 4 and filter wheel 2, optical path director element 3 is used to optical path being directed to the first filter
On colour table 21 or the second color filter plate 22, optical path director element 3 provided in this embodiment includes the first reflecting mirror 31 and the second reflection
Mirror 32；Wherein, the first reflecting mirror 31 can be at first angle and second angle；When first reflecting mirror 31 is in first angle, the
One reflecting mirror 31 receives the fluorescence of at least one color, and reflexes to the second reflecting mirror 32, and the second reflecting mirror 32 will be received glimmering
Light reflexes on the second color filter plate 22；When second reflecting mirror 32 is in second angle, the fluorescence of at least one color is directly emitted
To the first color filter plate 21.
Specifically, the first reflecting mirror 31 and the second reflecting mirror 32 are arranged in parallel, and first angle is in preferably with respect to optical path
45 °, and make that fluorescence successively passes through the first reflecting mirror 31 and the second reflecting mirror 32 is emitted on the second color filter plate 22, as shown in Figure 5；
The second angle of reflecting mirror are as follows: the optical path of the first reflecting mirror 31 and fluorescence is arranged in parallel, and makes fluorescence without optical path director element
It is directly emitted on the first color filter plate 21, as shown in Figure 6.
Further, the laser light source that the present embodiment one provides further includes the first stepper motor 301 and positioning device 302,
Optical path director element 3 is mounted in positioning device 302, and the first stepper motor 301 leads optical path for controlling positioning device 302
The fluorescence of at least one color is guided to be emitted on the first color filter plate 21 or the second color filter plate 22 to element 3.
When it is implemented, the first stepper motor 301 controls positioning device 302, positioning device 302 drives optical path director element
3 the first reflecting mirror is connected 31 rotations, and the first reflecting mirror 31 is made be in different angles, in the present embodiment, it is preferable that first instead
The controlled system of mirror is penetrated to be located in relative to 45 ° or 0 ° of optical path.Specifically, positioning device 302 can be drive the first reflecting mirror 31 rotation
The rotating mechanism turned, and the rotating mechanism can accurately position the angle of the first reflecting mirror 31, be at 45° angle degree and
0 ° of angle.
Fig. 7 is a kind of structural schematic diagram of laser projection device provided by Embodiment 2 of the present invention.As shown in fig. 7, this reality
The projection arrangement 300 for applying example offer, includes a kind of laser light source 200 of previous embodiment one, further includes ray machine 303 and camera lens
304.Specifically, laser light source 200 is used as the projection light source of laser television or other projection devices.Laser light source
After emitting beam, after the modulation of ray machine 303, imaging is realized using components such as camera lenses, and is finally projected to imaging picture
On curtain or other projection surfaces, to complete the display of image frame.
Specifically, when needing to provide the light source of higher brightness, at this point, the first stepper motor 301 does not work, blue laser
The first color filter plate 21 that can successively pass through on fluorescent wheel 4, optical path director element 3 and filter wheel 2 goes out to project relatively highlighted for providing
The three primary light source of degree.When needing to provide higher but not high to the brightness requirement light source of purity, need to change above-mentioned default
State controls positioning device 302 connected to it at this point, the first stepper motor 301 is in running order, realizes that optical path is led
Fluorescence is guided to be emitted on the second color filter plate to element 3, so that blue light successively passes through fluorescent wheel 4, optical path director element 3 and colour filter
The second color filter plate 22 on wheel 2 goes out to project the three primary light source for improving higher color purity.
Wherein, ray machine 303 is for receiving above-mentioned laser light source 200, and modulates output.Ray machine 303 generally includes number
Micro mirror element (Digital Micro mirror Device, DMD).Digital Micromirror Device can be modulated light, and make
Modulated light carries out picture imaging by camera lens 304.Image frame can be projected to projection with suitable focal length by camera lens
On screen, to realize the Projection Display of image frame on the projection screen.
In addition, the specific structure, function and working principle in laser light source 200 used by the present embodiment two are preceding
It states and is described in detail in embodiment one, details are not described herein again, wherein in order to realize fluorescent wheel 4 and filter wheel in laser light source
2 synchronous rotation further includes second stepper motor 3011, by the control of second stepper motor 3011, realizes fluorescent wheel 4 and filter
The operation such as synchronous rotary, starting and deceleration of colour wheel 2.
Fig. 8 is a kind of step schematic diagram for laser light source mode switching method that the embodiment of the present invention three provides, application
In the laser projection device that above-described embodiment two provides.
The laser light source in laser projection device that above-described embodiment two provides has both of which, in laser projection device
It is general to default work in one mode, therefore in pattern switching when initialization, it is to be switched to another kind from default conditions
The process of state.Specific steps are as shown in Figure 8:
S301: reception pattern switching command；
S302: laser is closed；
S303: the first step motor control positioning device, the fluorescence for making optical path director element guide at least one color are emitted to
On first color filter plate or the second color filter plate；
S304: starting laser.
Due in watching process when pattern switching, will appear during adjusting optical path director element 3 picture color or
Brightness is abnormal and influences subjective experience, therefore laser projection device 300 need to carry out screen closing operation, that is, receive pattern switching instruction
Afterwards, it is first shut off laser 1, makes fluorescent wheel not in transmitting fluorescence, and then avoid the situation of picture color exception or brightness exception.
But ray machine 303 causes power wastage, but the switch mode is simple to operation, and switches also in working condition at this time
Time is shorter, and specific switching flow is as shown in Figure 8.
Another mode switching method can be following steps, avoid the ray machine also function caused by work after light source cutting
Consumption waste, specific steps are as follows:
S401: reception pattern switching command；
S402: it closes laser, close ray machine；
S403: the first step motor control positioning device, the fluorescence for making optical path director element guide at least one color are emitted to
On first color filter plate or the second color filter plate；
S404: starting laser and ray machine.
It first has to close laser 1, closes ray machine 303, wherein ray machine 303 includes Digital Micromirror Device (Digital
Micro mirror Device, DMD).Because input signal is converted into RGB number in current most optical projection systems
According to the static random access memory (Static Random-Access Memory, SRAM) of DMD is written in data in order, leads to
Cross surface of the image formation by rays in DMD of colour wheel.When filter wheel 2 rotates, obtained by the fluorescence filter of the wide spectrum of filter wheel 2
The light of first spectral width, or the light of the second spectral width is obtained by the fluorescence filter of the wide spectrum of filter wheel 2, wherein the
One spectral width is greater than the second spectral width, and sequence is incident upon on DMD.Colour wheel and video image are synchronous operation, so
When hot illumination is mapped on DMD, the position and intensity that the upper small eyeglass of DMD should be shown according to red information tilt to " on "
State, similarly, green light and blue light are also so to work.Therefore, it if current picture will carry out pattern switching, needs first to close sharp
Light device 1 and ray machine 303.Then positioning device is controlled by the first stepper motor 301, makes the reflecting mirror liter of optical path director element 3
Rise or lowering action (45 ° or 0 ° of deflection angle) so that optical path in transmission process by reflecting mirror reflection change hot spot irradiate
Position on filter wheel 2 adjusts the process time-consuming of optical path director element 3 less than 1 second, always consumes in the whole process of pattern switching
When about at 1 second to 2 seconds, can satisfy the usage experience of user, specific workflow block diagram is as shown in Figure 9.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (11)
1. a kind of laser light source characterized by comprising
Laser, for generating laser；
Fluorescent wheel, for receiving the laser and inspiring the fluorescence of at least one color；
Filter wheel is filtered with the fluorescent wheel synchronous rotary including the first color filter plate being arranged radially along the filter wheel and second
Colour table；
Optical path director element is arranged in the optical path between the fluorescent wheel and filter wheel, is used at least one color
Fluorescence guidance be emitted on first color filter plate or the second color filter plate；
Wherein, first color filter plate is used to receive the glimmering of at least one color of the optical path director element guidance outgoing
Light, and export the light of the first spectral width；Second color filter plate be used to receive optical path director element outgoing it is described extremely
A kind of fluorescence of few color, and export the light of the second spectral width；And first spectral width is greater than second spectrum
Width.
2. a kind of laser light source according to claim 1, which is characterized in that the light of first spectral width is spectral width
Degree is greater than the green light of the second range wide greater than the feux rouges or spectral width of the first range wide；Second spectral width
Light be spectral width be less than third range wide feux rouges or spectral width less than the 4th range wide green light.
3. a kind of laser light source according to claim 1, which is characterized in that the light of first spectral width includes spectrum
Width is greater than the green light of the second range wide greater than the feux rouges and spectral width of the first range wide；Second spectral width
The light of degree include spectral width be less than third range wide feux rouges and spectral width less than the 4th range wide green light.
4. a kind of laser light source according to claim 3, which is characterized in that the fluorescent wheel includes being distributed along excircle
Phosphor region and the first transmission area, the phosphor region are used to receive the laser and issue the fluorescence of at least one color, and described the
Laser described in one transmissive region.
5. a kind of laser light source according to claim 4, which is characterized in that first color filter plate and second colour filter
The second transmission area and third transmission area are further respectively had in the circumferential direction of plate, the laser of the first transmission area outgoing passes through the light
Road director element is guided to second transmission area and third transmission area.
6. a kind of laser light source according to claim 5, which is characterized in that first color filter plate is arranged in the colour filter
It takes turns on excircle, the inside of first color filter plate is arranged in second color filter plate.
7. a kind of laser light source according to claim 6, which is characterized in that the optical path director element includes the first reflection
Mirror and the second reflecting mirror；Wherein, first reflecting mirror can be at first angle and second angle；First reflecting mirror is in
When the first angle, first reflecting mirror receives the fluorescence of at least one color, and reflexes to second reflecting mirror, institute
Stating the second reflecting mirror will be on received fluorescent reflection to second color filter plate；Second reflecting mirror is in the second angle
When, the fluorescence of at least one color is directly emitted on first color filter plate.
8. a kind of laser light source according to claim 5, which is characterized in that first transmission area, the second transmission area and
Third transmission area is glass substrate or diffusion sheet.
9. -8 any a kind of laser light source according to claim 1, which is characterized in that further include positioning device and the first step
Into motor, on the positioning device, first stepper motor is used to control the positioning device for the optical path director element installation,
Make the optical path director element that the fluorescence of at least one color be guided to be emitted to first color filter plate or the second color filter plate
On.
10. a kind of laser projection device, including laser light source as claimed in claim 9, which is characterized in that further include:
Ray machine for receiving the laser light source, and modulates output；
Camera lens, the modulated light source for receiving the ray machine output is imaged, and is projected projection screen and formed projected picture.
11. a kind of method of laser light source pattern switching, is applied to laser projection device described in any one of claim 10, feature exists
In, comprising the following steps:
Reception pattern switching command；
Close the laser；
Positioning device described in first step motor control makes the optical path director element guide at least one color
Fluorescence is emitted on first color filter plate or the second color filter plate；
Start the laser.
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| CN201811368154.0A CN109358467B (en) | 2018-11-16 | 2018-11-16 | Laser light source, light source mode switching method and laser projection equipment |
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| CN109358467B (en) | 2023-01-10 |
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