CN103383096B - A kind of contrast adjustment mechanism and the projector with the mechanism - Google Patents
A kind of contrast adjustment mechanism and the projector with the mechanism Download PDFInfo
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- CN103383096B CN103383096B CN201310293502.3A CN201310293502A CN103383096B CN 103383096 B CN103383096 B CN 103383096B CN 201310293502 A CN201310293502 A CN 201310293502A CN 103383096 B CN103383096 B CN 103383096B
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Abstract
The invention discloses a kind of contrast adjustment mechanism and with the projector of the mechanism, including driving part and transmission parts, contrast adjustment mechanism further includes lens system, and lens system includes the first lens and the second lens being disposed adjacent successively on the radiation direction that sends out of light supply apparatus of projector；The plane of incidence of first lens and exit facet are not parallel, and the plane of incidence and exit facet of the second lens are not parallel, and the plane of incidence of the first lens is parallel to the exit facet of the second lens, and the exit facet of the first lens is parallel to the plane of incidence of the second lens；Driving part drives the first lens and the second lens to carry out the relative rotation for separating and overlapping by the transmission parts, the intensity of the light by lens system is adjusted, to adjust the contrast of projector.Since lens can block and scatter completely the light that light source is sent out, the contrast of projector is improved.
Description
Technical field
The present invention relates to the contrast adjustment mechanism of projection device field more particularly to a kind of projector and there is the mechanism
Projector.
Background technology
With the development of technology, the technical need of projector is continuously improved, for the noise of projector, clarity and comparison
The requirement of degree etc. is higher and higher.Projector generally comprises lighting mechanism, optical modulator body and light projection mechanism, light in lighting mechanism
The light that source device is sent out is directed to liquid crystal display etc. by a series of optical element and shows equipment, and the display equipment is as light tune
Mechanism processed, by showing the modulated light of equipment by showing picture in a series of lens projects to screen in light projection mechanism
Face.
In the light path of projector, after the light supply apparatus of lighting mechanism, it is provided with contrast adjustment mechanism (IRIS),
Light barrier is provided in IRIS, the angle being in the light by changing light barrier, to which control is logical by the light of contrast adjustment mechanism
Amount achievees the effect that change luminous intensity, so as to control the brightness for showing picture on screen, reaches the comparison of control projector
The effect of degree.But the light blocking ability of the light barrier in IRIS is limited at present, because of the light supply apparatus hair in lighting mechanism
The intensity of light extraction is very big, and light barrier cannot reflect light back into light supply apparatus and be seriously affected with preventing the temperature of light supply apparatus from increasing
Its service life；And if light is all blocked and absorbed by light barrier, the temperature of light barrier can be made drastically to increase, it is made to soften and lose
Remove light blocking ability so that projector's cisco unity malfunction.
Also, the contrast of current projector is not high, in projector Hei Chang, i.e. light barrier fully shading light source device
Still there is light that can penetrate, this is because caused by the too small reason of the area that is in the light of light barrier.If in order to increase contrast
The area that is in the light for increasing light barrier can make light barrier temperature at complete black field excessively high and melt.Also, existing contrast adjustment
The light barrier of mechanism uses metal material, and thermal conductivity is strong, the plate temperature that is in the light is excessively high can make connect with light barrier other match and be arranged
Standby temperature also increases, thus it requires these corollary equipments also have higher high temperature resistance, to increase contrast adjustment
The manufacturing cost of mechanism.As it can be seen that projector's there are contrasts not high, light barrier is in the light bad defect of performance at present.
Invention content
The purpose of the present invention is to provide a kind of big calorimetrics that can disperse simultaneously effectively to absorb projector light source device and send out
The contrast ratio of projector regulating mechanism of amount, to solve how fully to block light supply apparatus light to improve the contrast of projector
The technical issues of.Further, the present invention also aims to provide being in the light in a kind of contrast mechanism that heat resistance is good
Mechanism, with solve how to improve the mechanism that is in the light be in the light reliability and reduce be in the light mechanism production cost the technical issues of.
In order to solve the above technical problems, the present invention provides a kind of contrast adjustment mechanism of projector, including driving portion
Part and transmission parts, the contrast adjustment mechanism further includes lens system, and the lens system is included in the light source of projector
The first lens and the second lens being disposed adjacent successively on the radiation direction that device is sent out；The plane of incidence of first lens with go out
Penetrate that face is not parallel, the plane of incidence and exit facet of second lens are not parallel, and the planes of incidence of first lens is parallel to described
The exit facet of second lens, the exit facet of first lens are parallel to the plane of incidence of second lens；The transmission parts
It is fixedly connected with the lens system, the driving part drives first lens and described second by the transmission parts
Lens carry out the relative rotation for separating and overlapping, in first lens and completely separable second lens, the light source
The light sent out is all transmitted through the lens system by first lens or second lens；Described first
When lens and second lens are completely superposed, the light half that the light source is sent out passes through the first lens or second lens
Be transmitted through the lens system, the other half by the gap in the lens system pass through the lens system.
Preferably, first lens and second lens are prism, the exit facet of first lens and described
The plane of incidence of second lens is the surface with dog-ear vertex.
Preferably, the equal position in dog-ear vertex on the dog-ear vertex of the first lens exit facet and second lens entrance face
In on the center line of the light supply apparatus.
Preferably, first lens are convex mirror and second lens are concave mirror or first lens are
Concave mirror and second lens are convex mirror.
Preferably, the contrast adjustment mechanism further includes fixing device, and the fixing device includes for described in fixation
First sleeve of the first lens, the second sleeve for fixing second lens and installation first sleeve and described the
The guide tube of two sleeves, wherein the guide tube is fixedly connected with the light supply apparatus.
Preferably, first sleeve is equal with the cross-sectional area of the second sleeve, first lens and described
Section upslide shade of two lens on the vertical radiation direction is same, and the area of the projection is the 1/2 of the cross-sectional area.
Preferably, the transmission parts include first gear and second gear, and the first gear is fixed on the driving
On the output shaft of component, the second gear is fixedly connected with first lens or second lens, the first gear
It is engaged with the second gear.
Preferably, the transmission parts include driving wheel, driven wheel and chain, and the driving wheel is fixed on the driving portion
On the output shaft of part, the driven wheel is fixedly connected with first lens or second lens, the chain and the master
Driving wheel and driven wheel engagement.
The present invention also provides a kind of projectors, including：Lighting mechanism has the light supply apparatus to emit beam；Light modulation
Mechanism, the light for being sent out to the lighting mechanism are modulated；Light projection mechanism, for projecting the optical modulator body tune
Light after system；The light that the lighting mechanism, optical modulator body and the light projection mechanism emit beam along the light supply apparatus
Road is set gradually；Contrast adjustment mechanism also described in any one of the above embodiments, the contrast adjustment mechanism in the lighting mechanism
It is arranged between the light supply apparatus and the optical modulator body in the light path.
Preferably, the lighting mechanism further includes the session being arranged between the lens system and the optical modulator body
Wall, the session wall is arranged in the outside of the lens system, for absorbing the light Jing Guo the lens system.
Setting lens block the light of light supply apparatus in the contrast adjustment mechanism of the present invention, are overlapped by adjusting two lens
Partial size achievees the effect that adjust contrast to adjust the light intensity through lens system light.The present invention due to
The mutually matched lens of corresponding optical surface are used, when light passes through two lens non-coincidence parts, light is dispersed into
On session wall, the heat that light supply apparatus is sent out uniformly is absorbed by session wall, and light passes through the part that two lens overlap
Or the gap section in lens system, light all will not be turned back and be absorbed.Compared with prior art, using lens shielding light
The light that source is sent out, due to the refraction of lens, all light are absorbed when can ensure the black field of projector, reach complete black field,
Improve the contrast of projector.By adjusting the size of two lens overlapping areas, can control through contrast adjustment knot
The light intensity of the light of structure, to adjust the contrast of projector.
Further, it is reflected using the light of lens on light source device due to the present invention, avoids the gear of small area
Tabula rasa absorbs the amount of heat of light supply apparatus and local temperature is caused drastically to increase that light barrier structural failure and service life is made to contract
Short situation realizes and effectively blocks light supply apparatus light, improves the service life of contrast adjustment mechanism, maintains projector high
The technique effect of contrast work.Further, since the material of lens is generally glass, have heat safe ability to be not easy
It is influenced by light supply apparatus high heat and shortens the service life.Also, the production cost of lens is low, to effectively reduce comparison
Spend the production cost of light barrier in regulating mechanism.In addition, the capacity of heat transmission of glass is not also strong, from without matching to connected to it
The heat resistance of complete equipment proposes excessive demand, advantageously reduces the manufacturing cost of projector.
Description of the drawings
Fig. 1 is the decomposition texture schematic diagram of the contrast adjustment mechanism of an embodiment of the present invention；
Fig. 2 is the schematic diagram of contrast adjustment mechanism shown in FIG. 1 package assembly；
Fig. 3 is a kind of the first lens arrangement schematic diagram of embodiment；
Fig. 4 is the second lens arrangement schematic diagram being used cooperatively with Fig. 3；
Fig. 5 is the light path schematic diagram that light passes through the first lens and the non-intersection of the second lens；
Fig. 6 is light by the first lens and the second lens intersection and the light path schematic diagram of gap section.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The realization of the present invention is described in detail below in conjunction with specific attached drawing.
As depicted in figs. 1 and 2, a kind of contrast adjustment mechanism of projector is provided in one embodiment of the present of invention,
Including driving part 8 and transmission parts 10, contrast adjustment mechanism further includes lens system 11, and the light supply apparatus 1 of projector is penetrated
The light gone out passes through the lens system 11, and lens system 11 includes on the radiation direction 7 that sends out of light supply apparatus 1 of projector
The first lens 4 and the second lens 5 being disposed adjacent successively.Specifically, be disposed adjacent successively refer to light supply apparatus 1 send out it is parallel
Light first passes through after the first lens 4 by the second lens 5, without others in the light path between the first lens 4 and the second lens 5
Component has part without the blocking of the first lens and/or the second lens and turns back, and the light of rest part all have passed through once
Or it the blocking of lens twice and turns back.It should be noted that so-called lens refer to that all transmitted lights can be according in the present invention
Include convex mirror, concave mirror and prism according to the mirror body that optical principle transmits light.
As shown in figures 3 to 6, the plane of incidence 41 of the first lens 4 and exit facet 44 are not parallel, the plane of incidence 54 of the second lens 5
Not parallel with exit facet 51, the plane of incidence 41 of the first lens 4 is parallel to the exit facet 51 of the second lens 5, the outgoing of the first lens
Face 44 is parallel to the plane of incidence 54 of the second lens.According to the optical principle of lens, due to the incidence of the first lens and the second lens
Face and exit facet are not parallel, then will only be turned back by a lens projects light in the first lens and the second lens,
What is sent out due to light source is directional light, directional light the first lens of incidence or the second lens, and when outgoing will occur to scatter or polymerization
After scatter, so as to effectively disperse and absorb the heat that light source emits beam, so that uniform light is mapped on session wall and absorbed.
Since the exit facet of the first lens is parallel with the plane of incidence of the second lens, the exit facet of the plane of incidence of the first lens and the second lens
It is parallel, it is ensured that when the first lens and the second lens are completely superposed, two lens constitute a cylindrical lens, to make light source
The directional light sent out is after the first lens and the second lens that are completely superposed, and still keeping parallelism light does not reflect, to light
It does not lose by force, the light intensity of outgoing is maximum.It should be noted that face with face is parallel refers to that two faces extend according to existing direction
It converges at infinity, includes parallel between plane, also include the combinatorial surface of the parallel and multiple plane composition between curved surface
Between it is parallel, to refer to that each corresponding surface corresponds to parallel for combinatorial surface parallel.
Transmission parts 10 are fixedly connected with lens system 11, and transmission parts are fixedly connected with a component in lens system
It is considered that transmission parts are fixedly connected with lens system, driving part 8 drives transmission parts 10 to move, and transmission parts 10 drive
First lens 4 and the second lens 5 carry out the relative rotation for separating and overlapping.The separated and coincidence of two lens is from vertical light side
It is seen to 7, the two is separated and overlapped.
In the first lens 4 and completely separable the second lens 5, i.e., when above-mentioned two lens do not have the part of any coincidence, light
The light that source device 1 is sent out all is transmitted through lens system 11 by the first lens 4 or the second lens 5, i.e., all light
Must and lens system can only be passed through by an ability in above-mentioned two lens；It is complete in the first lens 4 and the second lens 5
When coincidence, light half that light supply apparatus 1 is sent out is transmitted through lens system 11 by the first lens and the second lens, another
Half passes through lens system by the gap in lens system, i.e.,：Above-mentioned two lens are seen from vertical radiation direction 7 to coincide together,
When not having any part not overlapped, the directional light half that light source is sent out passes through the transmission of two lens, and half is by directly passing through
Gap beside two lens.
As shown in figure 5, in the first lens 4 and completely separable the second lens 5, the directional light of all injections is all needed by one
The refraction of a lens, forms the emergent ray scattered again after scattering or polymerization, and emergent ray is mapped to session wall 15 and is uniformly inhaled
It receives, under the state, all light are blocked and turned back by lens, and light intensity is reduced at most, and all light absorb after being refracted, right
The state of the black field of completion of projector is answered to make the institute by lens system since lens system reflects all light
There is light that can effectively and uniformly be absorbed by session wall, there is no light to project on screen when so as to ensure black field.When
First lens 4 and the second lens 5 are relatively rotated, the part that the coincidence of two lens will occur in lens system, corresponding lens
To occur portion void in system, other parts are then the non-coincidence parts of two lens.Light when passing through intersection, due to
The corresponding surface of two lens is parallel, therefore passing through of not reflecting of light, i.e., by being still directional light later, light intensity is not damaged
It loses.When light passes through gap section, light directly passes through, and light intensity is not lost.When light is by non-coincidence part, light passes through
It reflects and is absorbed, light intensity incurs loss.Therefore, big by adjusting the range of intersection between the first lens and the second lens
It is small, the corresponding size for also having adjusted non-coincidence part and gap section, to have adjusted the light intensity magnitude by lens system,
Achieve the effect that adjust projector's brightness.When the first lens and the second lens are completely superposed, light passes through intersection or sky
All without superrefraction, light intensity is not lost for gap part, reaches maximum, and at this moment the brightness of projector is maximum.
It is shut out the light using lens in the embodiment of the present invention, all light can be reflected at complete black field, ensure do not have
There is light to penetrate on screen, and all light can be made by reflecting and loss is thrown on screen, not improve when needed
The contrast of projector.And the refraction principle of lens is utilized when being blocked and being absorbed to light in the embodiment of the present invention,
So that light is refracted rear uniform pickup, avoids light barrier small area and absorb amount of heat and damage.In addition, the material one of lens
As be glass, thermal conductivity is not strong, reduces the heat resistant requirements for being connected thereto equipment, has saved the manufacturing cost of projector.
As shown in figures 3 to 6, in a preferred embodiment, the first lens 4 and the second lens 5 are prism, and first thoroughly
The exit facet 44 of mirror and the plane of incidence 54 of the second lens are the surface with dog-ear vertex.It should be noted that prism refers to
The plane of incidence is not parallel with exit facet, and is the light penetrating object of the combinatorial surface of plane or plane.In the preferred embodiment, first
The exit facet 44 of lens and the plane of incidence 54 of the second lens have a dog-ear vertex, i.e., there are two exit facet 44 and the plane of incidence 54 be all
The combinatorial surface of the angled composition of planar shaped.Specifically, as shown in Figure 5 and Figure 6, exit facet 44 includes 42 He of the first exit facet
Second exit facet 43, the plane of incidence 54 include first plane of incidence 52 and second plane of incidence 53, the first exit facet 42 and first plane of incidence
52 is parallel, and the second exit facet 43 is parallel with second plane of incidence 53, the plane of incidence 41 of the first lens and the exit facet 51 of the second lens
It is parallel.As shown in figure 5, the light by the non-intersection of the first lens 4 and the second lens 5 is scattered or is dissipated again after polymerizeing
It penetrates, to be absorbed by the session wall 15 being arranged on the outside of lens system.As shown in fig. 6, by the first lens 4 and the second lens 5
The light of intersection and gap section keeps original parallel light direction, light not to be refracted and absorb.
It is further preferred that as shown in Figure 1, shown in Figure 5, the dog-ear vertex of the first lens exit facet 44 and the second lens entrance face
54 dog-ear vertex is respectively positioned on the center line 7 of light supply apparatus 1.It thereby may be ensured that light saturating by the first lens and second
Entire session wall can be made to be heated evenly, be less prone to hot-spot uniformly to two sidescatterings when the non-intersection of mirror.
In additional embodiment, dog-ear vertex may also deviate from the center line of light supply apparatus, although light when non-intersection by scattering to
The light intensity of homonymy is not different, but the light scattered can be absorbed by session wall 15, can realize the base to shut out the light
This effect.What is more, and the first lens exit facet 44 and the second lens entrance face 54 can be arranged in a further embodiment
For inclined-plane parallel to each other, that is, do not have dog-ear, be a plane, can will be scattered in this way by the relationship of non-intersection yet
Onto session wall, only session wall is relatively heated can be uneven in the presence of some.
In an additional preferred embodiment, can be convex mirror by the first lens 4 and the second lens 5 are concave mirror, specifically
For, the exit facet of convex mirror should keep curved surface parallel with the plane of incidence of concave mirror, i.e. the curvature of the two is identical, convex mirror
The plane of incidence is parallel with the exit facet of concave mirror, and the plane of incidence and the exit facet of concave mirror that can be convex mirror are all vertical light side
Can also be the plane of incidence of convex mirror and the exit facet of concave mirror is the identical parallel surfaces of curvature to 7 plane.According to concave surface
The optical principle of mirror and convex mirror, by the way that light can be made to be scattered by light when the non-intersection of concave mirror and convex mirror
Or scattered after polymerization, and then absorbed, when light is by intersection and the gap section of concave mirror and convex mirror, light is not
It is reflected and loses and pass through.Likewise, in another embodiment, the first lens 4 can also be set to concave mirror and second
Lens 5 are set as convex mirror.
Preferably, in the embodiment above, as shown in Figure 1, fixing device can be arranged in contrast adjustment mechanism
12, fixing device 12 include for fixed first lens 4 the first sleeve 3, for fix the second sleeve 6 of the second lens 5 with
And the guide tube 2 of installation the first sleeve 3 and second sleeve 6, specifically, the first sleeve 3 and second sleeve 6 are fixedly connected on guide tube
The surface of inside guide tube wall.Wherein, guide tube 2 is fixedly connected with light supply apparatus 1, and the light that light supply apparatus 1 is sent out all limits
In the inside of guide tube 2, it can just be appeared to which whole light have to pass through the lens system being fixed in guide tube 2, avoid light not
The case where just being projected through lens system.Specifically, passing through the relative rotation of the first sleeve 3 and second sleeve 6, thus it is possible to vary first
The size of the intersection of lens 4 and the first lens 5, from the first lens 4 and the second lens 5 are completely separable blocks whole light,
The rotation being completely superposed to the first lens 4 and the second lens 5, it is all real by the relative rotation of the first sleeve 3 and second sleeve 6
It is existing.The size of first sleeve and second sleeve does not require just the same, and the size of the first lens and the second lens has not also required
Complete the same, as long as to account for the first sleeve area identical as the area of the first sleeve intermediate gap for the first lens, the second lens account for second set
Cylinder area is identical as the area of second sleeve intermediate gap, you can to ensure that the light that light source is sent out has been absorbed into from being blocked completely
It is complete do not suffer a loss by whole process realization.
Preferably, as shown in Figure 1, the first sleeve 3 is equal with the cross-sectional area of second sleeve 6, the first lens 4 and second are saturating
Section upslide shade of the mirror 5 on vertical radiation direction 7 is same, and the area of projection is the 1/2 of cross-sectional area.It should be noted that
The cross section of sleeve refers to the section vertical with radiation direction 7；Project it is identical refer to projection shape, area it is all identical, so as to
The first lens 4 and the second lens 5 are enough made to reach the state being completely superposed, under the preferred situation, i.e. the first sleeve 3 and second set
6 cross section sizes of cylinder are identical, and 4 and second lens 5 of corresponding first lens account for 1/2 cross-sectional area of corresponding sleeve.It is more excellent
Choosing, the first sleeve 3 and second sleeve 6 are hollow ring, and the first lens 4 and the second lens 5 are on vertical radiation direction 7
Projection is semicircle on section, which accounts for the half that above-mentioned annulus surrounds area.
In the above various embodiments, it is preferred that transmission parts 10 can be specifically configured to include first gear 9 and the second tooth
Wheel 13, first gear 9 is fixed on the output shaft of driving part 8, and second gear 13 is fixedly connected with the secondth lens 5, this is solid
Fixed connection can preferably be adopted by the realization that is fixedly connected of second sleeve 6 and second gear 13, specific connection type
It connection types, the first gear 9 such as is threadedly coupled, welds, being bonded to engage with second gear 13.Thus the engaged transmission of gear,
When driving part rotates, corresponding first gear carries out the rotation of the same direction, and second gear 13 is driven to rotate, to second
Lens 5 rotate, and corresponding to change the size of the first lens and the second lens intersection, driving part is to another side
To the direction that when rotation, the second lens 5 rotate.Likewise, can also be that second gear is fixedly connected with the first lens, pass through
The rotation of one lens adjusts the size of two lens intersections to change the contrast of projector.Further, it is also possible to be arranged two
Driving part and two sleeve gear transmission systems, each driving part drive each lens rotation by each transmission system, equally
The adjusting of two lens intersection sizes may be implemented.
In a further preferred embodiment, transmission system is chain drive system comprising driving wheel, driven wheel and chain,
Driving wheel is fixed on the output shaft of driving part 8, and driven wheel is fixedly connected with the first lens or the second lens, chain and active
Wheel and driven wheel engagement.Driving part drives driving wheel rotation, driving wheel to drive chain movement, and then the driven rotation of chain-driving
It is dynamic, realize the rotation of corresponding lens.Details are not described herein.
In the above various embodiments, driving part 8 preferably uses motor, such as stepper motor.
Driving part 8 may be mounted on the boss 14 for being set to 2 outer surface of guide tube, form driving part 8 and guide tube 2
It is fixedly connected.
In another embodiment, a kind of projector is provided comprising：Lighting mechanism has the light source to emit beam；Light
Modulating mechanism, the light for being sent out to the lighting mechanism are modulated；Light projection mechanism, for projecting the light modulation machine
The modulated light of structure.Lighting mechanism, optical modulator body and light projection mechanism are set gradually along the light path that light source emits beam；I.e.
The light sent out from light source passes through lighting mechanism, optical modulator body and light projection mechanism successively, finally projects on screen.Wherein
Lighting mechanism in further include any one contrast adjustment mechanism in above-mentioned each embodiment, contrast adjustment mechanism is in light path
Upper to be arranged between light source and optical modulator body, i.e., the light that light source is sent out first passes through the lens system in contrast adjustment mechanism
System, is modulated by optical modulator body again after lens system.
Preferably, lighting mechanism further includes the session wall being arranged between lens system and optical modulator body, and session wall is set
It sets in the outside of the lens, for absorbing the light Jing Guo lens system.
The range overlapped by adjusting two pieces of lens, it is complete in two lens to adjust the light intensity by lens system
When separating entirely, light intensity is minimum, the completely black field of projector, and when two lens are completely superposed, light intensity is maximum, projector's screen
Curtain is most bright.By the relative rotation of lens, can from will by the light intensity of lens system from most it is weak change to it is most strong, to improve
The contrast of projector.Being blocked completely in lens on light line is, lens on light line is scattered so that the heat of light source can
It is efficiently absorbed.Also, since the material of lens is generally relatively cheap, and the not strong conductivity of heat to connecting component of conductivity of heat
It is required that it is also not high, to save the manufacturing cost of projector.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of contrast adjustment mechanism of projector, including driving part and transmission parts, which is characterized in that the contrast
Regulating mechanism further includes lens system, the lens system include on the radiation direction that sends out of light supply apparatus of projector successively
The first lens and the second lens being disposed adjacent；
The plane of incidence and exit facet of first lens are not parallel, and the plane of incidence and exit facet of second lens are not parallel, institute
The plane of incidence for stating the first lens is parallel to the exit facet of second lens, and the exit facet of first lens is parallel to described
The plane of incidence of two lens；
The transmission parts are fixedly connected with the lens system, and the driving part drives described the by the transmission parts
One lens and second lens carry out the relative rotation for separating and overlapping, complete in first lens and second lens
When separating, light that the light source is sent out all is transmitted through the lens by first lens or second lens
System；When first lens and second lens are completely superposed, the light half that the light source is sent out is saturating by first
Mirror or second lens are transmitted through the lens system, the other half is passed through described by the gap in the lens system
Lens system.
2. contrast adjustment mechanism as described in claim 1, which is characterized in that first lens and second lens are equal
For prism, the plane of incidence of the exit facet of first lens and second lens is the surface with dog-ear vertex.
3. contrast adjustment mechanism as claimed in claim 2, which is characterized in that the dog-ear vertex of the first lens exit facet
It is respectively positioned on the center line of the light supply apparatus with the dog-ear vertex in second lens entrance face.
4. contrast adjustment mechanism as described in claim 1, which is characterized in that first lens are convex mirror and described the
Two lens are concave mirror or first lens are concave mirror and second lens are convex mirror.
5. contrast adjustment mechanism as described in claim 1, which is characterized in that the contrast adjustment mechanism further includes fixing
Device, the fixing device include for fixing the first sleeve of first lens, for fixing second lens
The guide tube of two sleeves and installation first sleeve and the second sleeve, wherein the guide tube is solid with the light supply apparatus
Fixed connection.
6. contrast adjustment mechanism as claimed in claim 5, which is characterized in that first sleeve and the second sleeve
Cross-sectional area is equal, and the section upslide shade of first lens and second lens on the vertical radiation direction is same,
The area of the projection is the 1/2 of the cross-sectional area.
7. contrast adjustment mechanism as claimed in any one of claims 1 to 6, which is characterized in that the transmission parts include first
Gear and second gear, the first gear are fixed on the output shaft of the driving part, the second gear and described the
One lens or second lens are fixedly connected, and the first gear is engaged with the second gear.
8. contrast adjustment mechanism as claimed in any one of claims 1 to 6, which is characterized in that the transmission parts include actively
Wheel, driven wheel and chain, the driving wheel are fixed on the output shaft of the driving part, and the driven wheel is saturating with described first
Mirror or second lens are fixedly connected, and the chain is engaged with the driving wheel and the driven wheel.
9. a kind of projector, including：
Lighting mechanism has the light supply apparatus to emit beam；
Optical modulator body, the light for being sent out to the lighting mechanism are modulated；
Light projection mechanism, for projecting the modulated light of the optical modulator body；
The lighting mechanism, optical modulator body and the light projection mechanism are set successively along the light path that the light supply apparatus emits beam
It sets；
It is characterized in that, further including such as claim 1-8 any one of them contrast adjustments mechanism, institute in the lighting mechanism
Contrast adjustment mechanism is stated in the light path to be arranged between the light supply apparatus and the optical modulator body.
10. a kind of projector as claimed in claim 9, which is characterized in that the lighting mechanism further includes being arranged described
Session wall between mirror system and the optical modulator body, the session wall are arranged in the outside of the lens system, for inhaling
Receive the light Jing Guo the lens system.
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| CN201310293502.3A CN103383096B (en) | 2013-07-12 | 2013-07-12 | A kind of contrast adjustment mechanism and the projector with the mechanism |
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| CN201310293502.3A CN103383096B (en) | 2013-07-12 | 2013-07-12 | A kind of contrast adjustment mechanism and the projector with the mechanism |
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| CN103383096B true CN103383096B (en) | 2018-09-14 |
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| CN107422585B (en) * | 2016-05-23 | 2023-03-31 | 海信视像科技股份有限公司 | Lens assembly and laser projection equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102053466A (en) * | 2009-10-27 | 2011-05-11 | 精工爱普生株式会社 | Projector |
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| JP2001183172A (en) * | 1999-12-24 | 2001-07-06 | Tdk Corp | Position or angle detecting apparatus |
| CN201362209Y (en) * | 2009-03-19 | 2009-12-16 | 郭廷麟 | Automobile bend lighting device |
| CN201589925U (en) * | 2009-08-21 | 2010-09-22 | 再兴电子(深圳)有限公司 | Projector |
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| US5069527A (en) * | 1990-04-26 | 1991-12-03 | Coherent, Inc. | Apparatus for measuring the mode quality of a laser beam |
| GB2250884A (en) * | 1990-12-07 | 1992-06-17 | Philips Electronic Associated | Optical image sensing array with microscan |
| CN1464319A (en) * | 2002-06-05 | 2003-12-31 | 波若威科技股份有限公司 | Variable optical attenuator |
| CN102053466A (en) * | 2009-10-27 | 2011-05-11 | 精工爱普生株式会社 | Projector |
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