CN107561835A - Light-emitting device and relevant projecting system and illuminator - Google Patents
Light-emitting device and relevant projecting system and illuminator Download PDFInfo
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- CN107561835A CN107561835A CN201610498185.2A CN201610498185A CN107561835A CN 107561835 A CN107561835 A CN 107561835A CN 201610498185 A CN201610498185 A CN 201610498185A CN 107561835 A CN107561835 A CN 107561835A
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Abstract
The embodiment of the invention discloses a kind of light-emitting device and relevant projecting system and illuminator, the light-emitting device includes：Light source；Area scattering piece, for being scattered to the incident ray from light source, and the incident ray oblique incidence is in the diffusion sheet, to cause the light to form the scattering hot spot of polarized shape after the diffusion sheet；The normal of area scattering piece scattering surface is determined by incident ray and predetermined direction in plane.Polarity shape in the embodiment of the present invention can more fully utilize the rectangle inlet area of integrating rod, the fluorescence hot spot for being incident in integrating rod can be bigger, it is also larger to be so incident in the exciting light hot spot of fluorescent material, so as to reduce exciting light energy density, reduces hot quenching phenomenon.
Description
Technical field
The present invention relates to display and lighting technical field, more particularly to a kind of light-emitting device and relevant projecting system and photograph
Bright system.
Background technology
The main direction of development that fluorescence is new special light source is produced using laser as excitation fluorescent material, at present
It is applied to the fields such as Projection Display, engineering special lighting.
Because the collimation of laser is extremely strong, if be directly focused to the laser of the collimation, obtained focus diameter pole
It is small, then easily to occur hot quenching phenomenon during excitated fluorescent powder.As shown in Figure 1a, it is wide at present in order to avoid the generation that hot-quenching is gone out
The scheme of general use is area scattering piece 12 to be used in the light path for the laser light incident fluorescent material that lasing light emitter 11 is emitted, by collimation
Laser L is scattering into the light cone with certain cone angle, and the light cone passes through condenser lens（It is not shown）Will be in objective plane A after focusing
On obtain a big circular light spot Y of the former focus of ratio, thus considerably reduce the energy density of focal point laser, reduce
The energy density of laser at fluorescent material.
Diffusion sheet scatters to obtain circular light spot, therefore the hot spot of light-emitting phosphor is also circular light spot.Circular light spot is very
More application scenarios are widely used, but it is not what is optimized to be applied in Projection Display.Because the screen of Projection Display
All it is rectangular.In order to obtain rectangular uniform light spots, in optical projection system it is general using integrating rod come to incident circle
Fluorescence hot spot carries out shaping, and this requires the circular light spot of incident integrating rod to be at least inscribed in the rectangle entrance of integrating rod（Such as
Shown in Fig. 1 b）.Although light can fully enter and obtain efficient utilization, circular light spot will be designed to smaller（Diameter
It is less than the bond length equal to integrating rod entrance）, therefore can not sufficiently utilize most of area of integrating rod entrance.Cause
To be designed to for circular fluorescent hot spot it is smaller, so the circular laser facula of incident fluorescence powder to be also designed to it is smaller, cause into
It is higher to penetrate the exciting light energy density of fluorescent material, hot-quenching is gone out easy generation.
The content of the invention
The present invention solves the technical problem of providing a kind of light-emitting device and relevant projecting system and illuminator, with
Solve that exciting light energy density is higher to cause hot-quenching to be gone out incidental problem.
The embodiment of the present invention provides a kind of light-emitting device, including：Light source；Area scattering piece, for the incidence from light source
Light is scattered, and the incident ray oblique incidence is in the diffusion sheet, to cause the light after the diffusion sheet formed with pole
The scattering hot spot of property shape；The normal of area scattering piece scattering surface is determined by incident ray and predetermined direction in plane.
Alternatively, incident ray is incident in the incident angle of diffusion sheet more than or equal to 20 degree.
Alternatively, the light-emitting device also includes the integrating rod positioned at area scattering piece light path rear end, and predetermined direction is along light path
The angle that the long side direction to the direction of the integrating rod plane of inlet Yu the entrance is projected when propagating to the integrating rod is no more than 30
Degree.
Alternatively, predetermined direction along paths to integrating rod when project to the direction of the integrating rod plane of inlet with should
The long side direction of entrance is parallel.
Alternatively, the integrating rod entrance is inscribed in when the scattering hot spot of polarity shape propagates to integrating rod.
Alternatively, the light-emitting device also includes adjuster, and the incidence angle of diffusion sheet is incident in for adjusting incident ray.
Alternatively, adjuster includes：Speculum, for reflecting the incident ray from light source to area scattering piece；Driving dress
Put, for driving speculum to rotate to change the incidence angle that incident ray is incident to the speculum.
Alternatively, the light-emitting device also includes controller, for being controlled according to predetermined demand to adjuster.
The embodiment of the present invention also provides a kind of optical projection system, including any of the above-described light-emitting device.
The embodiment of the present invention also provides a kind of illuminator, including any of the above-described light-emitting device.
Compared with prior art, the embodiment of the present invention includes following beneficial effect：
Relative to circular light spot of the prior art, the polarity shape in the embodiment of the present invention（Such as elliptical spot）Can be more
The rectangle inlet area of integrating rod is fully utilized, that is, the fluorescence hot spot for being incident in integrating rod can be bigger, is so incident in
The exciting light hot spot of fluorescent material is also larger, so as to reduce exciting light energy density, reduces hot quenching phenomenon.Also, this hair
The maximum polar orientation for scattering hot spot can also be adjusted to desired by bright embodiment by adjusting area scattering piece and incident ray
Predetermined direction so that the hot spot can match with light path posterior member.
Brief description of the drawings
Fig. 1 a are the hot spot schematic diagrames on the structural representation of light-emitting device and plane A in the prior art；
Fig. 1 b are the schematic diagrames for the rectangle entrance that circular light spot is inscribed in integrating rod；
Fig. 2 is the hot spot schematic diagram on the structural representation and plane A of light-emitting device in the present inventor's experiment；
Fig. 3 is the structural representation of area scattering piece in Fig. 2；
Fig. 4 a be light from the plane incidence mat surface of area scattering piece when, a miniature depression region inverse time of area scattering piece
The schematic diagram that pin rotates；
Fig. 4 b are the schematic diagram that region rotates counterclockwise on the right of miniature depression in Fig. 4 a；
Fig. 4 c are the schematic diagram that miniature depression left side region rotates counterclockwise in Fig. 4 a；
Fig. 4 d are the schematic diagram of the Numerical results of deflection angle in Fig. 4 b and Fig. 4 c；
Fig. 4 e be light from the plane incidence mat surface of area scattering piece when, area scattering piece rotate caused by scattering hot spot change feelings
Condition；
Fig. 5 a be light from the mat surface plane of incidence of area scattering piece when, a miniature depression region inverse time of area scattering piece
The schematic diagram that pin rotates；
Fig. 5 b are the schematic diagram that miniature depression left side region rotates counterclockwise in Fig. 5 a；
Fig. 5 c are the isoboles rotated in Fig. 5 b；
Fig. 5 d are the schematic diagram that region rotates counterclockwise on the right of miniature depression in Fig. 5 a；
Fig. 5 e be light from plane incidence mat surface when the schematic diagram that rotates counterclockwise of miniature depression；
Fig. 6 is incident ray, area scattering piece and the schematic diagram of predetermined direction relation；
Fig. 7 is the structural representation of one embodiment of light-emitting device in the embodiment of the present invention；
Fig. 8 a are the structural representations of another embodiment of light-emitting device in the embodiment of the present invention；
Fig. 8 b are the schematic diagrames of the integrating rod entrance that x directions look in Fig. 8 a embodiments；
Fig. 9 a are the structural representations of another embodiment of light-emitting device in the embodiment of the present invention；
Fig. 9 b are the schematic diagrames of the Wavelength converter that x directions look in Fig. 9 a embodiments；
Figure 10 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.
Embodiment
For the sake of quoting and understanding, the technical term that hereafter and in accompanying drawing uses is described as follows：
Material for transformation of wave length：Material for transformation of wave length can use phosphorescent material, such as phosphor, can also use nanometer material
Material, such as quantum dot, can also use fluorescent material.
Exciting light：Being capable of excitation wavelength transition material so that material for transformation of wave length produces the light of different wavelengths of light.
Stimulated light：Material for transformation of wave length is excited caused light.
Exciting light, material for transformation of wave length, stimulated light are relative concepts.For example, blue light excites yellow fluorescent powder to produce Huang
Light, now blue light is exciting light, and gold-tinted is stimulated light.And gold-tinted excitated red fluorescent powder produces feux rouges, now gold-tinted is to excite
Light, feux rouges are stimulated lights.
In the prior art, those skilled in the art generally believe that diffusion sheet scattering laser can only obtain circular light spot, therefore
Have to the circular light spot is shaped into rectangular light spots using shaping elements such as integrating rods.But the present inventor is in an experiment
Chance on this phenomenon：As shown in Fig. 2 by area scattering piece 12 in paper rotation in surface, such as from perpendicular to incident laser L direction
It is upper rotate be relative to the inclined directions of incident laser L after, area scattering piece 12 scatter after hot spot T1 in objective plane A（Hang down
Directly in the plane of paper）Above-below direction on deflection angle expand, it is overall in nearly ellipse.Equally, if the rotation of area scattering piece
Direction is rotated up as relative to incidence in the plane perpendicular to y directions, by area scattering piece from perpendicular to incident laser L side
Behind the inclined directions of laser L, deflection angles of the hot spot T2 on objective plane A left and right directions after the scattering of area scattering piece 12 expands
Greatly, it is overall in nearly ellipse.
To this discovery, present inventor has performed following principle analysis：
As shown in figure 3, area scattering piece 12 includes plane 31 and mat surface 32, the multiple miniature depressions of mat surface 32 collectively form
The different face of one both sides refractive index.Here refractive index different medium in both sides is most commonly that glass and air, but and unlimited
In this.Part below mat surface（For ease of description, hereinafter simply referred to as substrate）Can be transparent inorganic thing, glass is wherein
One example.It is transparent to refer to that the material on incident light is transparent, low absorption；Inorganic matter then has a variety of selections, example
Such as silica（Quartz）, aluminum oxide, titanium oxide etc., it is also possible to the mixture of a variety of inorganic matter compositions.And more than mat surface
Medium can be not only air or the other media different from substrate refractive index.Specifically, medium more than mat surface
It is transparent colloid to incident ray that can be, colloid is liquid when referring to coating, and becomes solid after solidification process later
The material of body.Colloid can use inorganic colloid, such as the inorganic glue of silicates, can also use organic colloid, such as
Transparent silica gel.
Macroscopical face B where multiple miniature depressions are common on mat surface is referred to as scattering surface.Area scattering piece is used in mat surface
Multiple irregular miniature depressions to light carry out deviation, so as to realize the purpose of scattering.In Fig. 2, it is assumed that area scattering piece
Rotation direction is the counter clockwise direction of paper, and the rotation causes laser to be no longer normally incident in scattering surface, then diffusion sheet is to light
The deviation of line is no longer uniform, but on objective plane A, parallel to rotational plane（That is paper）Direction on deflection angle
Become big, the deflection angle on the direction perpendicular to rotational planeIt is constant, so as to form the light of approximate ellipsoidal in objective plane A
Spot；Rotational plane refers to the plane that scattering surface B normal and incident ray are formed, deflection angleRefer to light after area scattering piece
The angle that direction changes, the i.e. angle of the emergent ray of area scattering piece and incident ray.
Deflection angle of the analysis below light on the direction parallel to rotational planeSituation of change.
Light is looked first at from the situation of the plane incidence mat surface of area scattering piece.Referring to Fig. 4 a and Fig. 4 b, Fig. 4 a is
Light from the plane incidence mat surface of area scattering piece when, what a miniature depression region of area scattering piece rotated counterclockwise shows
It is intended to；Fig. 4 b are the schematic diagram that region rotates counterclockwise on the right of miniature depression in Fig. 4 a.As shown in Figure 4 b, for each
For light, will successively by the refraction of plane and mat surface, the deflection angle of light i.e. by plane and mat surface rear to
The angle of change.Assuming that the refractive index of area scattering piece is n, plane and the angle in the two faces of mat surface（I.e. miniature depression is inclined
Angle）For, laser light incident is in the incidence angle of plane, then incident light is after the deviation in two faces, deflection angleIt is full
Foot：
…………①
From formula 1. in be difficult to parse analyze deflection angleWith incidence angleChange.But limiting case can be seen, that is, is worked asWhen smaller (Level off to 0),, it is seen that deflection angle of the light behind two facesWith incidence angleNothing
Close, nowFor determination value.This also illustrates the deflection angle of area scattering piece and incidence angleDependency relation within the specific limits
It is insensitive, that is, works asWhen smaller, deflection angle can not significantly be changed by rotating diffusion sheet（This is below in numerical computations
It can be verified）.
WhenWhen smaller condition can not meet,WithChange can be obtained by numerical computations.Such as Fig. 4 d institutes
Show, abscissa is the incidence angle that light is incident in plane, ordinate is the deflection angle of the light after plane, mat surface,
Dashed curve is the numerical result of formula 1., and the condition of the numerical analysis is,, the dashed curve
Fitted like a glove with experimental data, deflection angleWith incidence angleChange be monotonic increase, only deflection angleIn incidence
AngleWhen less（Such as<At 15 degree）Increase very unobvious.It can be seen that in Fig. 4 b, after area scattering piece rotates counterclockwise, enter
The angle increase that light is incident in diffusion sheet is penetrated, the increase of deflection angle of the light on the direction parallel to rotational plane will be caused,
So that scattering hot spot is oval, only the phenomenon when rotational angle is less, very take a fancy to by unobvious, scattering hot spot
Go to remain as a circular light spot, this may be exactly the main reason for phenomenon is never found.
The situation on the right of miniature depression in Fig. 4 a, the situation on the lower miniature depression left side of surface analysis are analyzed above.Refer to
Fig. 4 c, Fig. 4 c are the schematic diagram that miniature depression left side region rotates counterclockwise in Fig. 4 a.Through analyzing, in Fig. 4 c, deflection angleSimilarly meet formula 1., simply equivalent toIt has rotated to opposite direction, i.e.,Become big to negative direction.Using similarity condition
Carry out numerical analysis to obtain, block curve is the numerical result of formula 1. in Fig. 4 d.It can be seen that in Fig. 4 c, area scattering piece is inverse
After hour hands rotate, incident light beam strikes increase in the angle of diffusion sheet, will cause the increase of deflection angle, only the phenomenon is in incidence
AngleUnusual unobvious when less.Also, the block curve in Fig. 4 c is observed with dashed curve it can be found that in incidence angle
Certain limit in, such as incidence angle be less than 60 degree when, the deflection angle difference of block curve and dashed curve is within 1.5 degree.
As can be seen here, light is from the plane incidence mat surface of area scattering piece, and when area scattering piece rotates counterclockwise, with incidence angle
Increase, the deflection angle caused by the left side and the right of miniature depressionAlso all increase, and the left side and the amplitude of the right increase exist
It is close in certain rotational angle, this has been resulted on the direction parallel to rotational plane, and the angular both sides of deviation extend,
And the extension on both sides is substantially symmetrical.
Plane incidence mat surface of the light from area scattering piece, and the situation of area scattering piece rotate counterclockwise is described above.
It is appreciated that due to symmetric relation, light is from the plane incidence mat surface of area scattering piece, and area scattering piece is rotated clockwise and also had
Same effect.Refer to Fig. 4 e, Fig. 4 e be light from the plane incidence mat surface of area scattering piece when, area scattering piece, which rotates, to be caused
Scattering hot spot situation of change.As shown in fig 4e, in original state, the plane of light vertical incidence area scattering piece, now face
The scattering hot spot 1 of diffusion sheet is rounded；And after area scattering piece is rotated counterclockwise and rotated clockwise respectively, the scattering of area scattering piece
Hot spot 2 and 3 is ellipse.
Laser is analyzed above from the situation of plane incidence mat surface, situation of the lower surface analysis from mat surface plane of incidence.
Refer to Fig. 5 a, Fig. 5 a be light from the mat surface plane of incidence of area scattering piece when, one of area scattering piece is miniature
The schematic diagram that depression region rotates counterclockwise.Referring initially to the rotation situation on the miniature depression left side in Fig. 5 a.Refer to Fig. 5 b with
Fig. 5 c, Fig. 5 b are the schematic diagram that miniature depression left side region rotates counterclockwise in Fig. 5 a；Fig. 5 c be Fig. 5 b in rotate etc.
Effect figure.As shown in Figure 5 b, will be successively by the refraction of mat surface and plane, the deviation of light for each light
Angle is the angle with plane rear to change by mat surface.Miniature depression turns to state 2 from state 1 in Fig. 5 b, is equivalent to
Miniature depression turns to state 3 from state 1 and is rotated further by state 2 in Fig. 5 c, i.e., mat surface first is turned into flat（State 3）, it is further continued for
Rotate（State 2）.The rotational angle that miniature depression turns to state 3 from state 1 is equal to the miniature depression inclination angle of itself, this angle
Very little is spent, is typically only the several years.From state 3 to state 1, equivalent to light from plane incidence mat surface when miniature depression it is clockwise
Rotate, from analysis above, the deflection of light caused by the rotation of this low-angleVary less, can ignore
Disregard, so miniature depression turns to deflection angle caused by state 3 from state 1Vary less, can be ignored.Cause
This, miniature depression turns to state 2 from state 1 in Fig. 5 b, can be equivalent to miniature depression in Fig. 5 c and turn to state from state 3
2.And miniature depression from state 3 turn to state 2 actually equivalent to light from plane incidence mat surface when miniature depression it is inverse
Situation that hour hands rotate, therefore, light shown in Fig. 5 b from mat surface plane of incidence when the miniature depression left side rotate counterclockwise
Situation be equivalent to light from plane incidence mat surface when miniature depression situation about rotating counterclockwise（As shown in figure 4d）.
The subsequent rotation situation seen in Fig. 5 a on the right of miniature depression.It is micro- in Fig. 5 a to refer to Fig. 5 d and Fig. 5 e, Fig. 5 d
The schematic diagram that type depression the right region rotates counterclockwise；Fig. 5 e be light from plane incidence mat surface when the miniature depression inverse time
The schematic diagram that pin rotates.Miniature depression turns to state 2 from state 1 in Fig. 5 d, is equivalent in Fig. 5 e miniature depression from 1 turn of state
Move state 2.And in Fig. 5 e, the rotational angle that miniature depression turns to state 1 from state 3 is equal to inclining for miniature depression itself
Angle, this angle very little, is typically only the several years.From analysis above, the light caused by the rotation of this low-angle is inclined
KnuckleVary less, can be ignored, so miniature depression turns to deviation caused by state 1 from state 3 in Fig. 5 e
AngleVary less, can be ignored.Therefore, miniature depression turns to state 2 from state 1 in Fig. 5 d, can be equivalent to
Miniature depression turns to state 1 with turning to the sum of state 2 from state 1 from state 3 in Fig. 5 e, that is, is equivalent to from state 3 and rotates
To state 2.Therefore, the light shown in Fig. 5 d from mat surface plane of incidence when miniature depression on the right of situation about rotating counterclockwise it is equivalent
The situation that miniature depression rotates counterclockwise when light is from plane incidence mat surface.
Sum it up, from mat surface plane of incidence when miniature the depression left side and the right situation about rotating counterclockwise all be equivalent to
Light from plane incidence mat surface when miniature depression situation about rotating counterclockwise.Therefore, the mat surface of light from area scattering piece enters
Plane is penetrated, and when area scattering piece rotates counterclockwise, with the increase of incidence angle, caused by the left side and the right of miniature depression
Deflection angleAlso all increase, and the left side and the amplitude of the right increase are close in certain rotational angle, and this is resulted in
On the direction parallel to rotational plane, the angular both sides of deviation extend, and the extension on both sides is substantially symmetrical.Similarly,
Light also has same effect from the mat surface plane of incidence of area scattering piece when area scattering piece rotates clockwise, herein not
Labor again.
In summary, no matter light is incident in mat surface from plane or is incident in plane from mat surface, and also no matter face dissipates
Penetrate piece to rotate counterclockwise or rotate clockwise, on the direction parallel to rotational plane, the deflection angle of area scattering piece is all
Extend simultaneously to both sides, and the extension keeps almost symmetry, this with Germicidal efficacy to phenomenon match.And perpendicular to turn
On the direction of dynamic plane, the deflection angle of area scattering piece is constant, so area scattering piece forms approximate ellipsoidal in rotation process
Scatter hot spot.Length of the scattering hot spot of this nearly ellipse on P directions is more than the length on the Q directions perpendicular to P directions
The hot spot of this nearly ellipse is referred to as the scattering hot spot of polarized shape, the P directions is referred to as into polarity side by degree, the present inventor
To.If there is multiple polar orientations, then it is maximum polar orientation to define the maximum polar orientation of length.Such as ellipse-shaped light
Spot, major axis and be all polar orientation with the less direction of major axis angle, long axis direction is maximum polar orientation.
Further, the present inventor draws through testing with analysis：As shown in fig. 6, incident ray L1 oblique incidences dissipate in face
Penetrate piece, incident ray L1 and area scattering piece scattering surface normal L2 constitute normal plane C, normal plane C with perpendicular to scattering light
The plane D of optical axis（Hereinafter referred to as objective plane）Intersection L3 directions, be exactly the scattering hot spot T2 of polarized shape maximum
Polar orientation.Area scattering piece shown in Fig. 2 is a special case in paper rotation in surface, the normal plane that its incident ray is formed with normal
It is exactly paper, the normal plane and objective plane A intersection are exactly the vertical curve in paper, and the vertical curve direction is to scatter hot spot
T1 maximum polar orientation.
The embodiment of the present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
Embodiment one
According to above-mentioned experiment discovery and principle analysis, the present invention proposes a kind of light-emitting device.Referring to Fig. 7, Fig. 7 is of the invention real
Apply the structural representation of one embodiment of light-emitting device in example.As shown in fig. 7, light-emitting device 700 dissipates including light source 710 with face
Penetrate piece 720.
Light source 710 is preferably laser or other light-emitting components or component, as long as can provide has smaller hair
Dissipate the incident ray L1 at angle.
Structural reference Fig. 3 of area scattering piece 720 explanation.Light L1 from light source 710 is incident in area scattering piece 720,
Light L1 can be incident in the plane of area scattering piece 720, can also be incident in the mat surface of area scattering piece 720.Area scattering piece 720
For being scattered to incident ray L1, and incident ray L1 oblique incidences are in the diffusion sheet, to cause the light to be dissipated through this
Penetrate after piece and form the scattering hot spot T2 of polarized shape, such as elliptical spot.
Relative to circular light spot of the prior art, the polarity shape in the present embodiment（Such as elliptical spot）Can be more
The rectangle inlet area of integrating rod is fully utilized, that is, the fluorescence hot spot for being incident in integrating rod can be bigger, is so incident in
The exciting light hot spot of fluorescent material is also larger, so as to reduce exciting light energy density, reduces hot quenching phenomenon.In addition, this reality
Car light field can also be applied to by applying the scattering hot spot of the polarity shape in example.The light distribution of car light requires angle in the vertical direction
Spend small, angle is much bigger in the lateral direction, for example, be 5 degree of half-angle on left and right directions, about 1 degree of above-below direction upper half-angle.It is existing
The horizontally-spliced growth strip light spots of the circle or square focus spot of multiple light sources are realized car light light distribution by generally use in technology,
This problem of, is that lateral comparison is uniform, it is impossible to which most bright spot is effectively concentrated on center.And the scheme of the present embodiment is used,
Car light light distribution can be not only realized, but also the effect that brightness center most gradually reduces by force to both sides, thus energy can be realized
Enough shine is outranged.
Mentioned in above-mentioned analysis when the incident angle of incident ray is smaller, light is parallel to diffusion sheet rotational plane
Deflection angle on directionIncrease to obtain very little, so now scattering the polarity shape also very unobvious of hot spot, it appears that remain as
Individual circular light spot.It is therefore preferred that the incident angle that incident ray L1 is incident in area scattering piece 720 is more than or equal to 20 degree, so that
The polarity shape that hot spot must be scattered is more obvious.It is highly preferred that the incident angle that incident ray L1 is incident in area scattering piece 720 is big
In equal to 30 degree, the length-width ratio for now scattering the polarity shape of hot spot more meets projection demand.From Fig. 4 d, incidence angle is got over
Greatly, deflection angle is bigger, so the length-width ratio of the polarity shape of scattering hot spot is bigger, such as the major axis short axle ratio of ellipse light spot is got over
Greatly, therefore incident angle is preferably smaller than equal to 60 degree, and now hot spot polarity is not too large, i.e. the length-width ratio of hot spot is not too large,
And incident ray can avoid the occurrence of total reflection when passing through area scattering piece as far as possible, transmitance is higher.
Because the normal L2 of incident ray L1 and area scattering piece scattering surface constitutes normal plane C, normal plane C with perpendicular to
Objective plane D intersection L3 directions, it is exactly the scattering hot spot T2 of polarized shape maximum polar orientation.Therefore, in order that dissipating
The maximum polar orientation for penetrating hot spot is predetermined direction（Such as L3 directions）, area scattering piece 720 is also arranged to it and dissipated by the present embodiment
Face normal L2 is penetrated determined by incident ray L1 and predetermined direction L3 in plane.As illustrated, plane D' is put down with objective plane D
OK, the line L3' in plane D' is parallel with the line L3 in objective plane D, and the normal L2 of area scattering piece scattering surface is in incident ray L1
Intersect with line L3' in the plane C formed, i.e., intersect in incident ray L1 with line L3 in the plane C formed.
Therefore, using the present embodiment, the scattering hot spot of polarized shape can be not only obtained, but also adjustment can be passed through
Area scattering piece and incident ray, the maximum polar orientation of the hot spot is adjusted to desired predetermined direction so that the hot spot can be with
Match with light path posterior member, such as the maximum polar orientation of hot spot can be adjusted to parallel with integrating rod entrance long side
Direction.
Embodiment two
Refer to the structural representation that Fig. 8 a and Fig. 8 b, Fig. 8 a is another embodiment of light-emitting device in the embodiment of the present invention, figure
8b is the schematic diagram of the integrating rod entrance that x directions look in Fig. 8 a embodiments.As shown in Fig. 8 a and 8b, light-emitting device 800 wraps
Light source 810, area scattering piece 820 are included, the incident ray L1 oblique incidences that light source 810 is emitted are in area scattering piece 820.Light-emitting device is also
Including the integrating rod 830 positioned at the light path rear end of area scattering piece 820, the optical axis of the emergent light of area scattering piece 820 is the level side of paper
To integrating rod plane of inlet enters perpendicular to the optical axis, the long side direction of integrating rod entrance 831 parallel to the vertical direction of paper
The short side direction of mouth 831 is perpendicular to paper.
In the present embodiment, predetermined direction is arranged to the vertical direction of paper, parallel to the long side direction of integrating rod entrance.In advance
It is paper to determine direction with plane determined by incident ray L1, and the normal L2 for making its scattering surface by setting face diffusion sheet 820 exists
In paper so that area scattering piece 820 is emitted to the ellipse light spot T2 of integrating rod plane of inlet maximum polar orientation, i.e. major axis side
To the vertical direction for predetermined direction, i.e. paper.Therefore, in the present embodiment, by the way that predetermined direction is arranged in parallel to integrate
The long side direction of rod entrance so that long side side of the major axis of the ellipse light spot of integrating rod plane of inlet parallel to integrating rod entrance
To improving the matching degree of the hot spot and the entrance.Of course, it is possible to ellipse light spot is further set to enter close to being inscribed in integrating rod
Mouthful, hot spot is matched with entrance most preferably.
In other embodiments, the optical axis of the emergent light of area scattering piece 820 may also oblique incidence in integrating rod plane of inlet,
Also, the emergent light of area scattering piece 820 not may also be directly incident on integrating rod, but be incident in through optical elements such as speculums
Integrating rod, projected when now then requiring predetermined direction along paths to the integrating rod to the direction of the integrating rod plane of inlet
It is parallel with the long side direction of the entrance, you can so that long side direction of the major axis of ellipse light spot parallel to integrating rod entrance.Right
In the case that the matching degree requirement of hot spot and integrating rod entrance is less high, predetermined direction is arranged along paths to product
The angle that the long side direction to the direction of the integrating rod plane of inlet Yu the entrance is projected when dividing rod is no more than 30 degree.
Embodiment three
Refer to the structural representation that Fig. 9 a and Fig. 9 b, Fig. 9 a is another embodiment of light-emitting device in the embodiment of the present invention, figure
9b is the schematic diagram of the Wavelength converter that x directions look in Fig. 9 a embodiments.As shown in Fig. 9 a and 9b, light-emitting device 900
Including light source 910, area scattering piece 920, the incident ray L1 oblique incidences that light source 910 is emitted are in area scattering piece 920.Light-emitting device
Also include Wavelength converter 930, the light after area scattering piece 920 scatters is incident in the Wavelength converter, also, area scattering
For the optical axis of the emergent light of piece 920 perpendicular to Wavelength converter, the diameter D of Wavelength converter is the vertical direction of paper.
Wavelength converter 930 is in the form of annular discs, including is provided with the annulus 931 of material for transformation of wave length.Light source 910 is emitted
Light is exciting light, the material for transformation of wave length on the excitation Wavelength converter and produce stimulated light so that wavelength convert
Device is emitted stimulated light or stimulated light and the mixed light of unawakened exciting light.Light-emitting device also includes driving wavelength convert
Device 930 is around the drive device 940 of the axis periodic rotary of disk 930, such as motor, make it that Wavelength converter is swashed
The every bit on track is sent out all in by pulsed state, so as to reduce the local pyrexia amount of material for transformation of wave length, is carried
The high phototranstormation efficiency of material for transformation of wave length.
It is excited not changing Wavelength converter in the case of the girth of track, the length of exciting light hot spot in a circumferential direction
Spend smaller, then the local pyrexia amount of material for transformation of wave length is smaller.Therefore, in the present embodiment, predetermined direction is arranged to the perpendicular of paper
Nogata is to the i.e. direction of motion perpendicular to Wavelength converter 930.Predetermined direction is paper with plane determined by incident ray L1
Face, its scattering surface normal L2 is made in paper by setting face diffusion sheet 920 so that area scattering piece 920 is emitted to wavelength convert
The ellipse light spot T2 of device long axis direction is predetermined direction, the i.e. direction of motion perpendicular to Wavelength converter 930, and short axle
It is oriented parallel to the direction of motion of Wavelength converter 930.Now ellipse light spot T2 is on the circumferencial direction of Wavelength converter
Length it is minimum, the local pyrexia amount of material for transformation of wave length is minimum.Therefore, in the present embodiment, by the way that predetermined direction is arranged to
Perpendicular to the direction of motion of Wavelength converter so that the major axis of ellipse light spot fills perpendicular to wavelength convert on Wavelength converter
The direction of motion put, the direction of motion of the short axle parallel to Wavelength converter so that the local pyrexia amount of material for transformation of wave length is most
It is small.
In other embodiments, Wavelength converter 930 can also be in banding, including be provided with material for transformation of wave length above
Slab region.Correspondingly, drive device 940 is used to drive Wavelength converter along the direction periodicity ground wire perpendicular to paper
Property moves back and forth, to improve the phototranstormation efficiency of material for transformation of wave length.Now, again may be by predetermined direction being arranged to paper
The vertical direction in face, the i.e. direction of motion perpendicular to Wavelength converter so that the major axis of ellipse light spot on Wavelength converter
Perpendicular to the direction of motion of Wavelength converter, the direction of motion of the short axle parallel to Wavelength converter so that wavelength convert material
The local pyrexia amount of material is minimum.
In other embodiments, the optical axis of the emergent light of area scattering piece 920 may also oblique incidence in Wavelength converter, and
And the emergent light of area scattering piece 920 not may also be directly incident on Wavelength converter, but enter through optical elements such as speculums
Penetrate in Wavelength converter, project to wavelength and turn when now then requiring predetermined direction along paths to the Wavelength converter
The direction of changing device moving surface is perpendicular to the Wavelength converter direction of motion, you can so that ellipse light spot on Wavelength converter
The direction of motion of the short axle parallel to Wavelength converter so that the local pyrexia amount of material for transformation of wave length is minimum.It is of course also possible to
Predetermined direction is arranged to：Projected during along paths to the Wavelength converter to the direction of Wavelength converter moving surface
Be more than 60 degree with the angle of the Wavelength converter direction of motion and be less than 90 degree, now on Wavelength converter ellipse light spot it is short
Axle is closer to the direction of motion parallel to Wavelength converter, can make it that the local pyrexia amount of material for transformation of wave length is smaller.
Further, light-emitting device 900 can also include the integrating rod positioned at the light path rear end of Wavelength converter 930, should
Integrating rod is used for the emergent light for collecting Wavelength converter.Preferably, predetermined direction along paths to integrating rod when project
It is no more than 30 degree to the angle of the direction of the integrating rod plane of inlet and the long side direction of the entrance；It is highly preferred that predetermined direction
Projected during along paths to the integrating rod it is parallel with the long side direction of the integrating rod to the direction of the integrating rod plane of inlet,
So the major axis of the ellipse light spot of Wavelength converter outgoing improves the hot spot parallel to the long side direction of the integrating rod entrance
With the matching degree of the entrance.
Example IV
Referring to Fig. 10, Figure 10 is the structural representation of another embodiment of light-emitting device in the embodiment of the present invention.Such as Figure 10 institutes
Show, light-emitting device 1000 includes light source 1010, area scattering piece 1020, Wavelength converter 1030 and drive device 1040.
The present embodiment in place of the difference of embodiment three with including：
Light-emitting device 1000 also includes adjuster 1050, and area scattering piece is incident in for adjusting the incident ray L1 from light source
1020 incidence angle.Adjusting implement body can include being used to reflect the incident ray L1 from light source to the speculum of area scattering piece
1051 and drive the speculum rotate drive device 1052, drive device 1052 drive speculum 1051 rotate with change
Incident ray is incident to the incidence angle of the speculum.From Fig. 4 d, the incidence angle that incident ray L1 is incident to area scattering piece is got over
Greatly, deflection angle is bigger, so the length-width ratio of the polarity shape of scattering hot spot is bigger, such as the major axis short axle ratio of ellipse light spot is got over
Greatly.Therefore, appropriate incidence angle can be selected to realize the hot spot length-width ratio of needs by adjuster.
Further, light-emitting device 1000 can also include controller（It is not shown）, for according to predetermined demand to regulation
Device 1050 is controlled, to cause adjuster adjusts incident ray L1 according to predetermined demand to be incident in the incidence angle of area scattering piece.
For example, controller can send control instruction turns to needs to drive device 1052, control drive device by speculum 1051
Angle.This can be applied in dazzle light, such as can be incident in entering for area scattering piece according to different speed regulations
Firing angle, so as to obtain the scattering hot spot of different length-width ratios, realize different high beam ranges of exposures, such as the higher high beam of speed
Lateral angles scope it is smaller, irradiation distance is more remote.
It is understood that the adjuster, controller in the present embodiment can be applied equally to embodiment one and embodiment
Two.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The embodiment of the present invention also provides a kind of optical projection system, including light-emitting device, and the light-emitting device can have above-mentioned each
Structure and function in embodiment.The optical projection system can use various shadow casting techniques, such as liquid crystal display（LCD, Liquid
Crystal Display）Shadow casting technique, digital light processor（DLP, Digital Light Processor）Shadow casting technique.
For example, the light-emitting device of above-mentioned outgoing stimulated light can be as the light source of optical projection system.
The embodiment of the present invention also provides a kind of illuminator, including light-emitting device, and the light-emitting device can have above-mentioned each
Structure and function in embodiment.For example, above-mentioned light-emitting device can apply to torch for illumination, auto lamp illumination, stage lighting photograph
It is bright etc..
Embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this
The equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, it is included within the scope of the present invention.
Claims (10)
- A kind of 1. light-emitting device, it is characterised in that including：Light source；Area scattering piece, for being scattered to the incident ray from the light source, and the incident ray oblique incidence dissipates in this Piece is penetrated, to cause the light to form the scattering hot spot of polarized shape after the diffusion sheet；The normal of the area scattering piece scattering surface is determined by the incident ray and predetermined direction in plane.
- 2. light-emitting device according to claim 1, it is characterised in that：The incident ray is incident in entering for the diffusion sheet Firing angle degree is more than or equal to 20 degree.
- 3. light-emitting device according to claim 1, it is characterised in that：The light-emitting device also includes being located at the area scattering piece The integrating rod of light path rear end, projected when the predetermined direction is along paths to the integrating rod to the integrating rod plane of inlet Direction and the angle of the long side direction of the entrance are no more than 30 degree.
- 4. light-emitting device according to claim 3, it is characterised in that：The predetermined direction is along paths to the product Projected when dividing rod parallel with the long side direction of the entrance to the direction of the integrating rod plane of inlet.
- 5. light-emitting device according to claim 4, it is characterised in that：The scattering hot spot of the polarity shape propagates to described The integrating rod entrance is inscribed in during integrating rod.
- 6. light-emitting device according to any one of claim 1 to 5, it is characterised in that：The light-emitting device also includes regulation Device, the incidence angle of the diffusion sheet is incident in for adjusting the incident ray.
- 7. light-emitting device according to claim 6, it is characterised in that the adjuster includes：Speculum, for reflecting the incident ray from the light source to the area scattering piece；Drive device, for driving the speculum to rotate to change the incidence angle that incident ray is incident to the speculum.
- 8. light-emitting device according to claim 6, it is characterised in that：The light-emitting device also includes controller, for basis Predetermined demand is controlled to the adjuster.
- 9. a kind of optical projection system, it is characterised in that including the light-emitting device as any one of claim 1 to 8.
- 10. a kind of illuminator, it is characterised in that including the light-emitting device as any one of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610498185.2A CN107561835A (en) | 2016-06-30 | 2016-06-30 | Light-emitting device and relevant projecting system and illuminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610498185.2A CN107561835A (en) | 2016-06-30 | 2016-06-30 | Light-emitting device and relevant projecting system and illuminator |
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| Publication Number | Publication Date |
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| CN107561835A true CN107561835A (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610498185.2A Pending CN107561835A (en) | 2016-06-30 | 2016-06-30 | Light-emitting device and relevant projecting system and illuminator |
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| CN113050354A (en) * | 2021-03-05 | 2021-06-29 | 青岛海信激光显示股份有限公司 | Light source assembly and projection equipment |
| WO2021259270A1 (en) * | 2020-06-22 | 2021-12-30 | 青岛海信激光显示股份有限公司 | Light source assembly and projection device |
| CN114135803A (en) * | 2020-09-03 | 2022-03-04 | 上海蓝湖照明科技有限公司 | Laser light-emitting device and lamp |
| CN114135799A (en) * | 2020-09-03 | 2022-03-04 | 上海蓝湖照明科技有限公司 | Laser light source and lighting device |
| US11768428B2 (en) | 2020-06-22 | 2023-09-26 | Hisense Laser Display Co., Ltd | Laser source and laser projection apparatus |
| US12429756B2 (en) | 2020-06-22 | 2025-09-30 | Hisense Laser Display Co., Ltd | Laser projection apparatus |
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Application publication date: 20180109 |