CN207164451U - Optical projection system - Google Patents
Optical projection system Download PDFInfo
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- CN207164451U CN207164451U CN201720972936.XU CN201720972936U CN207164451U CN 207164451 U CN207164451 U CN 207164451U CN 201720972936 U CN201720972936 U CN 201720972936U CN 207164451 U CN207164451 U CN 207164451U
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Abstract
A kind of optical projection system is the utility model is related to, the optical projection system includes light supply apparatus, even photosystem, light modulation system and light recovery system.The light supply apparatus is used to launch first, second, and third primary lights.First, second, and third primary lights are homogenized and are emitted by the even photosystem.The light modulation system according to image to be displayed view data modulation from the light of the homogenization of the even photosystem outgoing, and formed for display image image light and be not used in the non-image light of display image.The smooth recovery system guides the non-image light to the even photosystem, the non-image light is emitted after being homogenized via the even photosystem.Non-image light is re-introduced to the light entrance face of even photosystem using light recovery system by the utility model, its primary lights sent with light supply apparatus is together again introduced into light modulation system after the homogenization of even photosystem, effectively increase the brightness and contrast of light utilization efficiency and display image.
Description
Technical field
It the utility model is related to projection art, more particularly to a kind of optical projection system.
Background technology
Existing optical projection system is widely used in the fields such as movie theatre, education, TV, and optical projection system uses light to adjust according to it
The species of device processed can be divided into DMD (Digital Micromirror Device), LCOS (Liquid Crystal on
Silicon), LCD (Liquid Crystal Display) etc., can be divided into one chip, double-disk according to the quantity of optical modulator
With three-chip type system.In order to ensure to project each pixel included in the brightness of each pixel of obtained image and view data
Gray value be that the luminous intensity of source emissioning light of proportional, current optical projection system typically keeps constant.In projection process
In, optical projection system produces image light and non-image light using light modulator modulates light source, and image light is projected to obtain
Image to be shown.However, the loss of non-image light causes the efficiency of light energy utilization relatively low.
Utility model content
In consideration of it, the utility model provides a kind of optical projection system of recyclable non-image light, non-image light can be realized
Recycle, to improve light utilization efficiency.
The utility model embodiment provides a kind of optical projection system, and the optical projection system includes：
Light supply apparatus, including for launching the first light source of the first primary lights, the second light for launching the second primary lights
Source and the 3rd light source for launching three primary colours light；
Even photosystem, for being homogenized and being emitted first primary lights, the second primary lights and three primary colours light；
Light modulation system, the homogenization for the view data modulation according to image to be displayed from the even photosystem outgoing
Light, and formed for display image image light and be not used in the non-image light of display image；
Light recovery system, for the non-image light to be guided to the even photosystem, make the non-image light via institute
State after even photosystem is homogenized and be emitted.
Further, the optical projection system also includes control device, and the control device is used for according to described image data
The non-image light controlled from light modulation system outgoing reaches the luminous flux of the even photosystem, and according to the non-figure
The luminous intensity for the primary lights that the light supply apparatus is launched is adjusted as the luminous flux of light, makes the primary lights of the light supply apparatus transmitting
The summation for the luminous flux that the luminous flux for reaching the even photosystem reaches the even photosystem with the non-image light generally remains
It is constant.
Further, the view data of the image to be displayed includes the view data of three primary colours；
The light modulation system is used for sub-frame images data modulation within a frame modulation period according to the first primary colours from institute
The first primary lights of even photosystem outgoing are stated to produce the image light of the first primary colours and non-image light, the subframe according to the second primary colours
View data modulates the second primary lights from the even photosystem outgoing to produce the image light of the second primary colours and non-image light, with
And the three primary colours light from the even photosystem outgoing is modulated to produce three primary colours according to the sub-frame images data of three primary colours
Image light and non-image light.
Further, the light modulation system includes the first optical modulator, the second optical modulator and the 3rd optical modulator,
First optical modulator is used for sub-frame images data modulation within a frame modulation period according to first primary colours described in
First primary lights of even photosystem outgoing, second optical modulator are used within a frame modulation period according to second primary colours
The modulation of sub-frame images data be used to adjust in a frame from the second primary lights of the even photosystem outgoing, the 3rd optical modulator
The three primary colours light being emitted in cycle processed according to the sub-frame images data modulation of the three primary colours from the even photosystem.
Further, the control device is additionally operable to produce light source control signal and modulation control signal, the light source control
Signal processed is used for the sequential for controlling first light source, secondary light source and the 3rd light source luminescent；
The light modulation system includes an optical modulator, and the modulation control signal is used to control the optical modulator to exist
First primary colours of the one frame interior sub-frame images data time division modulation according to corresponding primary colours modulation period from the even photosystem outgoing
Light, the second primary lights and three primary colours light.
Further, the modulation control signal is specifically used for controlling the optical modulator the first of a frame modulation period
The first primary lights that period is emitted according to the sub-frame images data modulation of first primary colours from the even photosystem, are adjusted in a frame
The second base that second period in cycle processed is emitted according to the sub-frame images data modulation of second primary colours from the even photosystem
Coloured light, and a frame modulation period the 3rd period according to the three primary colours the modulation of sub-frame images data from the even light
The three primary colours light of system exit.
Further, the smooth recovery system includes three light recycling modules, three smooth recycling modules and described the
One optical modulator, the second optical modulator, the 3rd optical modulator correspond, and the smooth recycling module is used for the light by corresponding to
Non-image light caused by modulators modulate is guided to the even photosystem.
Further, the smooth recovery system includes a light recycling module, and the smooth recycling module is used for the light
Non-image light caused by modulators modulate is guided to the even photosystem.
Further, the smooth recycling module include by multiple speculum groups into speculum group, the speculum group uses
In being changed into and incide the even photosystem before the light entrance face of the even photosystem is incided by the non-image light
Primary colours parallel light light；Or
The speculum group is used to control the non-image light to make in the incident angle of the light entrance face of the even photosystem
Must incide the even photosystem the non-image light and primary lights the light entrance face of the even photosystem incident angle
Distribution is continuous.
Further, described image light is the light with the first polarization state, and the non-image light is with the second polarization state
Light, first polarization state and second polarization state are the different two kinds of polarization states in polarization direction；The light is incident to adjust
The primary lights of device processed are the light of the 3rd polarization state, the 3rd polarization state and first polarization state or the second polarization state phase
Together；
The optical modulator is transmission liquid crystal light valve, including for adjusting the polarization for the light for inciding the optical modulator
The liquid crystal layer of state and the relative plane of incidence and exit facet, the light of the optical modulator is incident to along perpendicular to the light modulation
The direction of the plane of incidence of device is incident, and described image light and the non-image light are produced after the light modulator modulates；The figure
As light is emitted with the non-image light in the same direction from the exit facet of the optical modulator.
Further, the optical projection system also includes light directing arrangement, and the light directing arrangement includes polarization beam splitter,
The polarization beam splitter is used for the light of the polarization state of one of transmission of first-polarization-state and the second polarization state, and reflects another polarization
The light of state；The image light and non-image light that the optical modulator is emitted by the polarization beam splitter guide to different sides respectively
To.
Further, the optical modulator is digital micromirror device, including multiple micro mirror units, the digital micromirror device
The micro mirror unit in open state the light for being at least partly incident to the digital micromirror device is reflected to form into described image light,
The micro mirror unit in off status of the digital micromirror device is anti-by the light for being at least partly incident to the digital micromirror device
Penetrate to form the non-image light, described image light goes out with the non-image light from the digital micromirror device along different directions
Penetrate.
Further, the optical projection system also includes light directing arrangement, and the light directing arrangement includes Multiplexing apparatus, described
Multiplexing apparatus is used for image caused by first optical modulator, the second optical modulator and the 3rd light modulator modulates is photosynthetic
To be emitted after light beam.
Further, the optical projection system also includes light directing arrangement, and the light directing arrangement includes Multiplexing apparatus, described
Multiplexing apparatus is used to guide the light of first light source, secondary light source and the 3rd light source transmitting to the even photosystem.
Further, the Multiplexing apparatus includes the first closing light element and the second closing light element, the first closing light element
Light for the two of which light source in first light source, secondary light source and the 3rd light source to be launched is guided to the first light path,
It is set to be incident to the second closing light element along first light path；The second closing light element be used for by first light source,
The light and guided from the incident light of first light path to second that another light source in secondary light source and the 3rd light source is launched
Light path, it is set to be incident to the even photosystem along second light path.
Further, the even photosystem comprises at least dodging device, and the dodging device includes light entrance face, for connecing
First primary lights, the second primary lights and three primary colours light and the non-image light are received, and even light is carried out to it, makes its equal
Homogenize.
Further, the even photosystem includes three dodging devices, three dodging devices and described first
Light source, secondary light source, the 3rd light source correspond, the dodging device be used for receive corresponding to light source transmitting primary lights and
The non-image light of corresponding primary colours, and the light to receiving carries out even light.
The non-image light that light modulation system is emitted is re-introduced to even photosystem by the utility model using light recovery system
Light entrance face, its primary lights sent with light source is together again introduced into light modulation system after the homogenization of even photosystem,
The effective recycling for realizing non-image light, improves light utilization efficiency, improves the brightness and contrast of display image.
Brief description of the drawings
Fig. 1 is a kind of frame structure schematic diagram of optical projection system of the present utility model.
Fig. 2 is the structural representation of the optical projection system of the utility model first embodiment.
Fig. 3 is the structural representation of the optical projection system of the utility model second embodiment.
Fig. 4 is the structural representation of the optical projection system of the embodiment of the utility model the 3rd.
Fig. 5 is the structural representation of the optical projection system of the embodiment of the utility model the 4th.
Fig. 6 is the structural representation of the optical projection system of the embodiment of the utility model the 5th.
Fig. 7 is the structural representation of the optical projection system of the embodiment of the utility model the 6th.
Fig. 8 is a kind of schematic flow sheet of projecting method of the present utility model.
Main element symbol description
Optical projection system 10,100,200,300,400,500,600
Control device 11,110,210,311,411,511,611
Light supply apparatus 12
First light source 101R, 201R, 301R, 401R, 501R, 601R
Secondary light source 101G, 201G, 301G, 401G, 501G, 601G
3rd light source 101B, 201B, 301B, 401B, 501B, 601B
Even photosystem 13
Dodging device 102,202,305,405,505,605
Relay lens 103,203,306,404,406,504,506,604,606
Light modulation system 14
First optical modulator 104R, 205R
Second optical modulator 104G, 205G
3rd optical modulator 104B, 205B
Optical modulator 307,408,507,608
Polarization beam splitter 105,308,508
Light recovery system 16
Speculum 106,204,206,309,407,409,509,607,609
Multiplexing apparatus 107,207,502,602
First closing light element 302,402
Second closing light element 303,403
Projection lens 18,108,208,310,410,510,610
Following embodiment will further illustrate the utility model with reference to above-mentioned accompanying drawing.
Embodiment
Referring to Fig. 1, it is a kind of frame structure schematic diagram of optical projection system 10 of the present utility model.The optical projection system 10
Including light supply apparatus 12, even photosystem 13, light modulation system 14, light recovery system 16 and projection lens 18.Wherein, the light
The light that source device 12 is sent is emitted after the even photosystem 13 is homogenized.The light modulation system 14, which is used for foundation, to be treated
The light for the homogenization that the view data modulation of display image is emitted from the even photosystem 13, and form the figure for display image
As light and the non-image light for being not used in display image.
Wherein, described image light enters subsequent optical path, such as projection lens 18 etc..The projection lens 18 is arranged at described
On the emitting light path of image light, for described image light to be projected to presumptive area, so as to produce the image to be displayed.
The smooth recovery system 16 is used to guide the non-image light to the even photosystem 13, makes the non-image light
It is emitted after being homogenized via the even photosystem 13, and the new light launched with the light supply apparatus 12 is together into described
Modulated again in light modulation system 14.In the ideal case, non-image light is through repeatedly circulation, according to view data equal proportion
The output channel of image light is assigned to, so as to enhance the brightness of image light.
In the utility model, the light supply apparatus 12 includes the first light source for the first primary lights of transmitting, for sending out
Penetrate the secondary light source of the second primary lights and the 3rd light source for launching three primary colours light.The even photosystem 13 is used for institute
The first primary lights, the second primary lights and three primary colours light is stated to be homogenized and be emitted.
In the utility model, the optical projection system 10 also includes control device 11, and the control device 11 is used for basis
The light that the non-image light of the control of described image data from the light modulation system 14 outgoing reaches the even photosystem 13 leads to
Amount, and the luminous intensity for the primary lights that the light supply apparatus 12 is launched is adjusted according to the luminous flux of the non-image light, make described
The primary lights that light supply apparatus 12 is launched reach the luminous flux of the even photosystem 13 and the non-image light reaches the even spectrum
The summation of the luminous flux of system 13 generally remains constant.
In the utility model, the view data of the image to be displayed includes the view data of three primary colours.The light is adjusted
The sub-frame images data that system 14 processed is used for according to the first primary colours within a frame modulation period modulate from the even photosystem 13
The first primary lights penetrated to produce the image light of the first primary colours and non-image light, modulate by the sub-frame images data according to the second primary colours
The second primary lights being emitted from the even photosystem 13 are to produce the image light of the second primary colours and non-image light, and according to the 3rd
The sub-frame images data of primary colours modulate the three primary colours light from the even outgoing of photosystem 13 to produce the image light of three primary colours
And non-image light.
In projection, display field, optical modulator is broadly divided into two classes, and one kind is for representative with DMD (digital micromirror device)
The optical modulator for not limiting incident light polarization state, one kind is to be with LCD (liquid crystal light valve) and LCOS (reflective liquid crystal light valve)
What is represented limits optical modulator of the incident light as polarised light.
In the utility model, the technical scheme of corresponding digital micromirror device is deflected using the on-state and off-state of micro mirror
The different characteristic in direction, image light and non-image light are reflected towards different directions respectively, then will wherein by light recovery system 16
Non-image light guide to the light entrance face of even photosystem 13, so as to realize the recycling of non-image light.
In the utility model, the technical scheme of corresponding liquid crystal light valve and reflective liquid crystal light valve is special using the polarization of light
Property, the polarization state that the image light that light modulation system 14 is emitted and non-image light are divided into two kinds is different, and utilize light directing arrangement
Image light is guided to different directions respectively from non-image light, non-image light therein is re-introduced to even photosystem 13
Incidence end, there is obvious advantage relative to other schemes --- can easily using polarization state it is different by image light with
Non-image light distinguishes (as utilized polarization spectro piece).It is in the shape of light beam in the same direction even in image light and non-image light
Formula is emitted, and the different two-beam in direction still can be classified as with light splitting device.And such as above-mentioned digital micromirror device
In technical scheme, the deflection angle of micro mirror only has ± 12 °, namely corresponds to the image light of open state and correspond to the non-image of off status
Light is up to 24 ° of angle, it is difficult to is separated in short propagation distance.Set accordingly, with respect to the utility model digital micro-mirror
Standby is the scheme of representative, has more practicality using the technical scheme of image light and non-image light polarization state different qualities, is applicable
In more application environments.
The signified light source of the utility model, both it is that single light-emitting component (such as semiconductor light-emitting elements, is partly led including light source
Body light-emitting device array, bulb source etc.) situation, be also what light-emitting component and other optical element combinations obtained including light source
Illuminating module situation (for example, the illuminating module of light-emitting component and lens combination, light-emitting component and polarization conversion device it is luminous
Module).Light source described in the utility model can be regarded as to " flight data recorder " of an outgoing primary lights, can be wrapped in " flight data recorder "
Containing any kind of optical element.
The signified image light of the utility model, refer to the light of the display image corresponding to optical projection system, equivalent in general
The light into display screen in optical projection system；Non-image light refer to the utility model be used for recycle light, equivalent to general
Optical projection system in be filtered, light that do not enter display screen.
The utility model embodiment is described in detail with embodiment below in conjunction with the accompanying drawings.
First embodiment
Referring to Fig. 2, it is the structural representation of the optical projection system 100 of the utility model first embodiment.The projection
System 100 includes control device 110, light supply apparatus, even photosystem, light modulation system, light recovery system and light directing arrangement.
<Light supply apparatus>
Wherein, the light supply apparatus include be used for launch the first primary lights (such as red laser) the first light source 101R,
For launch the second primary lights (such as green laser) secondary light source 101G, for launch three primary colours light (such as blueness swash
Light) the 3rd light source 101B.
In the first embodiment, the first light source 101R, secondary light source 101G, the 3rd light source 101B are sharp
Radiant, such as laser diode light source, diode laser matrix light source or laser light source.The light source has etendue
The characteristics of small so that its light sent has less hot spot and the less smooth angle of divergence when entering even photosystem, and causes
Light keeps less etendue when inciding light modulation system by a series of optical elements, avoids substantial amounts of light because of hair
Dissipating angle can not be utilized greatly, improve light utilization efficiency.If using other light sources, such as bulb source, LED light source, its optics
Propagation is much larger than the etendue of LASER Light Source, will to make the hot spot for inciding even photosystem meet the size of the plane of incidence
The angle of divergence of light can be expanded, this will cause substantial amounts of light can not be by light modulation system utilization and in effective optics of light modulation system
Heat is converted into by absorption outside face.In the first embodiment, light and non-image light that light source is sent pass through geometry
The mode of closing light synthesizes light beam, originally increases the sectional area of even photosystem so that etendue expands, if using light
The big light source of propagation is learned, light utilization efficiency will be further reduced.And the first embodiment swashing using small etendue
Radiant, even if the light geometry closing light that the non-image light of recycling and light source are sent, still ensures that and incide light modulation system
The light of system has less etendue.
Certainly, under the environment less demanding to light utilization efficiency, bulb or LED light source can also be used as optical projection system
Light source.Under smooth recovery technology scheme of the present utility model, even if using such light source, also can be relative to not using this reality
There is higher light utilization efficiency with new technical scheme.
<Even photosystem>
The even photosystem comprises at least dodging device 102, and the dodging device 102 includes light entrance face, for receiving
First primary lights, the second primary lights and three primary colours light and the non-image light, and even light is carried out to it, make its uniform
Change, to enter the light modulation system according to the hot spot of preset shape.
In the first embodiment, the even photosystem includes three dodging devices 102, three even light
Device 102 and the first light source 101R, secondary light source 101G, the 3rd light source 101B are corresponded, and the dodging device 102 is used
The primary lights and the non-image light of corresponding primary colours launched in light source corresponding to reception, and the light to receiving carries out even light.
In the first embodiment, fly's-eye lens pair can be selected in the dodging device 102, and the fly's-eye lens is to entering
Penetrating face includes mutual nonoverlapping first area and second area, and the primary lights of light source transmitting enter compound eye from first area is incident
Lens pair, and non-image light enters fly's-eye lens pair from second area is incident.Because first area does not weigh mutually with second area
Fold, the primary lights that the technical scheme goes for light source transmitting are identical with non-image light wavelength, polarization state identical situation.This
It is due to that the primary lights that the light source in the first embodiment is launched are identical with the wavelength of non-image light, polarization state is identical, no
Can wavelength closing light or polarization closing light by way of closing light.
Certainly, the mode of this geometry closing light be equally applicable to light source transmitting primary lights and non-image light it is inclined
The different situation of polarization state, or even the primary lights suitable for light source transmitting and the situation that non-image light is non-polarized light, as long as ensureing
Light after closing light becomes the light of single polarization state before optical modulator is incided.Specifically, can be by being filled in even light
Put and a polarization conversion device is set in the light path between 102 and light modulation system, the polarization conversion device is used for even light
The emergent light of device 102 is converted to the light of the 3rd polarization state before light modulation system is incided.
In the first embodiment, first area and second area are arranged side by side in the light entrance face of dodging device 102
Row.In other embodiments, first area and second area can also be according to other arrangement modes.For example, by the secondth area
Domain is arranged at around first area, and first area is distributed with second area in " returning " font so that first area is located at even light
The center of device 102, the distribution mode can avoid the primary lights that light source is launched from having necessarily after the outgoing of dodging device 102
Deflection angle, and then it is easy to the angle of subsequent optical device to put, and there is more preferable uniformity.Present embodiment both can profit
Non-image light is reflexed into second area with the reflector plate (such as Back Word type reflector plate, middle mouth are through holes) of Intermediate Gray through hole,
The primary lights for simultaneously launching light source pass through；It can also utilize semi-transparent semi-reflecting light splitting piece that non-image light is divided into wavelength, polarization
State identical two-beam, it is separately directed to the second area of both sides above and below first area.In addition, first area and second area are also
Can be the arrangement of " mesh " font so that first area is located at second area center, and second area is divided into two parts and is located at the firstth area
Above and below domain (or left and right).
In the first embodiment, the area ratio of first area and second area is 1:1~1:5.In dodging device
In the case that 102 sectional area is constant, it is higher that first area area less than second area area enables to optical projection system to have
Light utilization efficiency.This is due to first area and second area is etendue closing light in principle, for the non-figure of identical
As light, second area area is bigger, and the angle of divergence is smaller corresponding to non-image light, and second area area is smaller, and non-image light is corresponding
The angle of divergence it is bigger, and the excessive angle of divergence can not be just utilized, therefore the ratio shared by second area determines light
The efficiency of recycling.In addition, being limited to the volume of optical projection system, the volume of dodging device 102 can not be excessive, therefore the firstth area
The size in domain will also meet the etendue requirement of light source emergent light, and first area can not infinitely reduce, and otherwise light source is launched
Primary lights the angle of divergence can also be expanded to make light source launch primary lights utilization rate decline.
It is appreciated that in other embodiments, optical tunnel or integrating rod also can be selected in the dodging device 102.
In the first embodiment, the even photosystem at least also includes relay lens 103, the relay lens
103 are arranged in the light path between the dodging device 102 and the light modulation system, for by the dodging device 102
Emergent light is focused before the light modulation system is incident to, even light or shaping.
It is appreciated that the technical scheme of the utility model protection is not limited to quantity in the first embodiment or species
Relay lens, the relay lens 103 can be convex lens or concavees lens.
<Light modulation system>
The light modulation system includes the first optical modulator 104R, the second optical modulator 104G and the 3rd optical modulator
The sub-frame images data that 104B, the first optical modulator 104R are used for according to first primary colours within a frame modulation period are adjusted
Make the first primary lights from the even photosystem outgoing, the second optical modulator 104G is used for the foundation within a frame modulation period
The second primary lights that the sub-frame images data modulation of second primary colours is emitted from the even photosystem, the 3rd optical modulator
The sub-frame images data modulation that 104B is used for according to the three primary colours within a frame modulation period is emitted from the even photosystem
Three primary colours light.
In the first embodiment, the first optical modulator 104R, the second optical modulator 104G, the 3rd light modulation
Device 104B is respectively transmission liquid crystal light valve, includes the liquid crystal of the polarization state for adjusting the light for inciding the optical modulator
Layer and the relative plane of incidence and exit facet, it is incident to incidence of the light edge perpendicular to the optical modulator of the optical modulator
The direction in face is incident, and described image light and the non-image light are produced after the light modulator modulates.Described image light and institute
Non-image light is stated to be emitted in the same direction from the exit facet of the optical modulator.
In the first embodiment, described image light is light (such as P light, but be not limited to the first polarization state
This), the non-image light is the light (such as S light, but not limited to this) with the second polarization state, first polarization state and described the
Two polarization states are two kinds of different polarization states of polarization direction.The image light of optical modulator outgoing is respectively guided to non-image light
Different directions.As described above, image light is different from the polarization state of non-image light so that both are easy to be divided, with more practicality
Property, suitable for more application environments.
In the first embodiment, the primary lights for being incident to the optical modulator are the 3rd polarization of single polarization state
The light of state.Because optical modulator acts to the polarization state of incident light, if the light for being incident to optical modulator has a variety of polarizations
State, then the image light as image part can not be separated according to the polarization state area of emergent light.The technical scheme avoids volume
Outer other polarization converters of increase so that the light and non-image light that light supply apparatus is sent can be directly after even photosystem homogenization
Utilized by optical modulator, simplify structure.
In the first embodiment, the 3rd polarization state is identical with second polarization state, that is, is changed polarization
The light of state turns into the image light of the first polarization state, and the light that remainder does not change polarization state turns into the non-image of the second polarization state
Light.The modulation system can be applied to optical modulator 104R, 104G, 104B voltage to change liquid crystal in liquid crystal layer by changing
The orientation of molecule is realized, is referred to LCD operation principle, here is omitted.
In other embodiments, the 3rd polarization state can also be identical with first polarization state, that is, is changed partially
Non-image light of the light of polarization state as the second polarization state, and the light of polarization state is not changed as image light.The technical scheme can
, by the way that picture signal is converted into inverse picture signal, and to be input to optical modulator on the basis of the first embodiment
To realize；Can also be by increasing half wave plate in optical modulator on the basis of the first embodiment come real
It is existing；It can also realize by using other kinds of transmission liquid crystal light valve, no longer describe in detail herein.
It is appreciated that the 3rd polarization state can also be different from first polarization state and second polarization state,
Such as the 3rd polarization state is elliptically polarized light.
<Light directing arrangement>
In the first embodiment, the light directing arrangement includes polarization beam splitter 105, the polarization spectro member
Part 105 is used for the light of the polarization state of one of transmission of first-polarization-state and the second polarization state, and reflects the light of another polarization state.It is described
The image light and non-image light that the optical modulator is emitted by polarization beam splitter 105 guide to different directions respectively.
The light directing arrangement also includes Multiplexing apparatus 107, and the Multiplexing apparatus 107 is arranged on the light modulation system
On emitting light path, for the first optical modulator 104R, the second optical modulator 104G and the 3rd optical modulator 104B to be adjusted
Image light caused by system is emitted after being combined into light beam, such as is emitted to projection lens 108.
<Light recovery system>
In the first embodiment, the smooth recovery system includes three light recycling modules, three light recovery
Module corresponds with the first optical modulator 104R, the second optical modulator 104G, the 3rd optical modulator 104B, and the light returns
Module is received to guide to the even photosystem for the non-image light caused by the light modulator modulates by corresponding to.
In the first embodiment, each smooth recycling module includes the reflection being made up of multiple speculums 106
Microscope group, the speculum group be used to the non-image light being changed into before the light entrance face of the even photosystem is incided with
Incide the light of the primary colours parallel light of the even photosystem.Or the speculum group is used to control the non-image light in institute
State the incident angle of the light entrance face of even photosystem so that the non-image light and primary lights for inciding the even photosystem exist
The incident angle distribution of the light entrance face of the even photosystem is continuous.
It is appreciated that the technical scheme of the utility model protection is not limited to the speculum of quantity or species in embodiment, only
It can realize and the non-image light be guided to the light entrance face of dodging device 102, it is entered again after dodging device 102
Enter the function of light modulation system.The speculum 106 can be plane mirror or curved reflector.
Second embodiment
Referring to Fig. 3, it is the structural representation of the optical projection system 200 of the utility model second embodiment.Second implements
The main distinction of the optical projection system 200 of mode and the optical projection system 100 of first embodiment is：In second embodiment
One optical modulator 205R, the second optical modulator 205G, the 3rd optical modulator 205B are respectively digital micromirror device, and the numeral is micro-
Mirror device includes multiple micro mirror units, and the micro mirror unit in open state of the digital micromirror device will be at least partly incident to
The light of the digital micromirror device reflects to form described image light, the micro mirror unit in off status of the digital micromirror device
The light for being at least partly incident to the digital micromirror device is reflected to form into the non-image light, described image light and the non-figure
As light is emitted from the digital micromirror device along different directions.
As described above, digital micromirror device is using the different characteristic of the on-state and off-state yawing moment of micro mirror, will
Image light and non-image light are reflected towards different directions respectively, therefore, without using polarization point in the second embodiment
The image light and non-image light that the optical modulator is emitted by optical element guide to different directions respectively.
It should be noted that in the range of the spirit or essential attributes of the utility model embodiment, it is real suitable for first
Each concrete scheme applied in mode can also repeat accordingly suitable for second embodiment to save space and avoiding
See, just repeat no more herein.
3rd embodiment
Referring to Fig. 4, it is the structural representation of the optical projection system 300 of the embodiment of the utility model the 3rd.3rd implements
The main distinction of the optical projection system 300 of mode and the optical projection system 100 of first embodiment is：The illumination mode of light supply apparatus
And the light combination mode of three primary colours light is different so that corresponding even photosystem, light modulation system, the structure of light recovery system
It is quantitatively also different.
Specifically, in the 3rd embodiment, Multiplexing apparatus is arranged on the light between light supply apparatus and even photosystem
Lu Shang, the Multiplexing apparatus be used for by the first light source 301R, secondary light source 301G and the 3rd light source 301B transmitting light guide to
The even photosystem.
In the 3rd embodiment, the Multiplexing apparatus includes the first closing light element 302 and the second closing light element
303, the first closing light element 302 is used in the first light source 301R, secondary light source 301G and the 3rd light source 301B
The light of two of which light source transmitting is guided to the first light path, it is incident to the second closing light element along first light path
303.The second closing light element 303 is used in the first light source 301R, secondary light source 301G and the 3rd light source 301B
The light and guided from the incident light of first light path to the second light path that another light source is launched, make it along second light path
It is incident to the even photosystem.
Wherein, the two of which light source transmitting in the first light source 301R, secondary light source 301G and the 3rd light source 301B
Light be incident to the first closing light element 302, the first light source 301R, secondary light source 301G and from different directions respectively
The light of another light source transmitting in three light source 301B and the light incidence from different directions respectively from first light path incidence
To the second closing light element 303.
In the 3rd embodiment, light directing arrangement also includes relay lens 304, and the relay lens 304 is set
In light path between the Multiplexing apparatus and the even photosystem, for by the emergent light of the Multiplexing apparatus being incident to
State be focused before even photosystem, even light or shaping.
In the 3rd embodiment, the even photosystem includes a dodging device 305, the light modulation system bag
An optical modulator 307 is included, the smooth recovery system includes a light recycling module, and the smooth recycling module is used for the light
Modulator 307 is modulated caused non-image light and guided to the dodging device 305.
In the 3rd embodiment, control device 311 is used to produce light source control signal and modulation control signal, institute
State the sequential that light source control signal is used to control the first light source 301R, secondary light source 301G and the 3rd light source 301B to light.
The modulation control signal is used to control the optical modulator 307 within a frame modulation period according to corresponding primary colours
First primary lights, second primary lights and three primary colours light of the sub-frame images data time division modulation from the even photosystem outgoing.
Specifically, the modulation control signal be used to controlling the optical modulator a frame modulation period the first period according to
According to the sub-frame images data modulation of first primary colours from the first primary lights of the even photosystem outgoing, in a frame modulation period
The second period according to second primary colours the modulation of sub-frame images data from the second primary lights of the even photosystem outgoing, with
And modulate from the even photosystem according to the sub-frame images data of the three primary colours in the 3rd period of a frame modulation period
The three primary colours light penetrated.
It should be noted that in the range of the spirit or essential attributes of the utility model embodiment, it is real suitable for first
Each concrete scheme applied in mode can also repeat accordingly suitable for the 3rd embodiment to save space and avoiding
See, just repeat no more herein.
4th embodiment
Referring to Fig. 5, it is the structural representation of the optical projection system 400 of the embodiment of the utility model the 4th.4th implements
The main distinction of the optical projection system 400 and the optical projection system 300 of the 3rd embodiment of mode is：Light in 4th embodiment
Modulator 408 is digital micromirror device, and the digital micromirror device includes multiple micro mirror units, the place of the digital micromirror device
The light for being at least partly incident to the digital micromirror device is reflected to form into described image light in the micro mirror unit of open state, it is described
The micro mirror unit in off status of digital micromirror device will at least partly be incident to the light reflection of the digital micromirror device
Into the non-image light, described image light is emitted with the non-image light from the digital micromirror device along different directions.
As described above, digital micromirror device is using the different characteristic of the on-state and off-state yawing moment of micro mirror, will
Image light and non-image light are reflected towards different directions respectively, therefore, without using polarization point in the 4th embodiment
The image light and non-image light that the optical modulator 408 is emitted by optical element guide to different directions respectively.
It should be noted that in the range of the spirit or essential attributes of the utility model embodiment, suitable for first,
2nd, each concrete scheme in three embodiments can also be accordingly suitable for the 4th embodiment, to save space and avoiding
For the sake of repeating, just repeat no more herein.
5th embodiment
Referring to Fig. 6, it is the structural representation of the optical projection system 500 of the embodiment of the utility model the 5th.5th implements
The main distinction of the optical projection system 300 of the embodiment of optical projection system 500 and the 3rd of mode is the difference of Multiplexing apparatus, the 5th
Embodiment neutralizing light device includes a closing light element, the first light source 501R, secondary light source 501G and the 3rd light source 501B hairs
The light penetrated is incident to the closing light element from different directions respectively.
It should be noted that in the range of the spirit or essential attributes of the utility model embodiment, suitable for first and third
Each concrete scheme in embodiment can also repeat accordingly suitable for the 5th embodiment to save space and avoiding
See, just repeat no more herein.
6th embodiment
Referring to Fig. 7, it is the structural representation of the optical projection system 600 of the embodiment of the utility model the 6th.6th implements
The main distinction of the optical projection system 400 of the embodiment of optical projection system 600 and the 4th of mode is the difference of Multiplexing apparatus, the 6th
Embodiment neutralizing light device includes a closing light element, the first light source 601R, secondary light source 601G and the 3rd light source 601B hairs
The light penetrated is incident to the closing light element from different directions respectively.
It should be noted that in the range of the spirit or essential attributes of the utility model embodiment, suitable for first,
2nd, each concrete scheme in four embodiments can also be accordingly suitable for the 6th embodiment, to save space and avoiding
For the sake of repeating, just repeat no more herein.
In the utility model, optical projection system can be television devices, projector apparatus, spell wall equipment, stage computer
Any projection such as lamp apparatus, image projection lamp apparatus shows monochromatic or multicolor image equipment.
Because the utility model is by the way that non-image modulation light is re-assigned in display image corresponding to image light, therefore
Compared to scheme of the present utility model is not used, display image brightness of the present utility model improves.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar portion mutually referring to.
The non-image light that light modulation system is emitted is re-introduced to even photosystem by the utility model using light recovery system
Light entrance face, its primary lights sent with light source is together again introduced into light modulation system after the homogenization of even photosystem,
The effective recycling for realizing non-image light, improves light utilization efficiency, improves the brightness and contrast of display image.This
Utility model receives the characteristic of degree using dodging device larger etendue in itself, except meet that light source sends compared with
Small etendue, also leave enough etendue surpluses and recycled for non-image light so that light organic efficiency is big
It is big to improve.
Referring to Fig. 8, the utility model also provide it is a kind of be applied to above-mentioned optical projection system 10,100,200,300,400,
500 or 600 projecting method, the projecting method comprise the following steps：
Step 801, light supply apparatus is controlled to launch the first primary lights, the second primary lights and three primary colours light.
Step 802, first primary lights, the second primary lights and three primary colours light are homogenized using even photosystem
And it is emitted.
Step 803, it is emitted using view data modulation of the light modulation system according to image to be displayed from the even photosystem
Homogenization light, and formed for display image image light and be not used in the non-image light of display image.
In the present embodiment, the view data of the image to be displayed includes the view data of three primary colours.
The step 803 specifically includes：
Sub-frame images data modulation within a frame modulation period according to the first primary colours is from the of the even photosystem outgoing
One primary lights are to produce the image light of the first primary colours and non-image light, and the sub-frame images data modulation according to the second primary colours is described in
Second primary lights of even photosystem outgoing are to produce the image light of the second primary colours and non-image light, and the son according to three primary colours
Frame image data modulates the three primary colours light from the even photosystem outgoing to produce the image light of three primary colours and non-image light.
Step 804, the non-image light is guided to the even photosystem using light recovery system, makes the non-image light
It is emitted after being homogenized via the even photosystem.
Step 805, described image light is projected to presumptive area, to produce the image to be displayed.
In the utility model, the projecting method also includes：The non-image light is controlled to arrive according to described image data
The primary colours of light supply apparatus transmitting are adjusted up to the luminous flux of the even photosystem, and according to the luminous flux of the non-image light
The luminous intensity of light, the luminous flux of the primary lights arrival even photosystem of the light supply apparatus transmitting is set to be arrived with the non-image light
Summation up to the luminous flux of the even photosystem generally remains constant.
Embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, it is all
It is the equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or directly or indirectly uses
In other related technical areas, similarly it is included in scope of patent protection of the present utility model.
Claims (17)
- A kind of 1. optical projection system, it is characterised in that：The optical projection system includes：Light supply apparatus, including for launch the first primary lights the first light source, for launch the second primary lights secondary light source with And for launching the 3rd light source of three primary colours light；Even photosystem, for being homogenized and being emitted first primary lights, the second primary lights and three primary colours light；Light modulation system, the homogenization being emitted for the view data modulation according to image to be displayed from the even photosystem Light, and formed for display image image light and be not used in the non-image light of display image；Light recovery system, for the non-image light to be guided to the even photosystem, make the non-image light via described even Photosystem is emitted after being homogenized.
- 2. optical projection system as claimed in claim 1, it is characterised in that：The optical projection system also includes control device, the control The non-image light that device processed is used to be emitted from the light modulation system according to the control of described image data reaches the even light The luminous flux of system, and adjust the light intensity of the primary lights of light supply apparatus transmitting according to the luminous flux of the non-image light Degree, make the luminous flux of the primary lights arrival even photosystem of the light supply apparatus transmitting and non-image light arrival described even The summation of the luminous flux of photosystem generally remains constant.
- 3. optical projection system as claimed in claim 2, it is characterised in that：The view data of the image to be displayed includes three primary colours View data；The light modulation system is used for sub-frame images data modulation within a frame modulation period according to the first primary colours from described even First primary lights of photosystem outgoing are to produce the image light of the first primary colours and non-image light, the sub-frame images according to the second primary colours Data modulate the second primary lights from the even photosystem outgoing to produce the image light of the second primary colours and non-image light, Yi Jiyi The three primary colours light from the even photosystem outgoing is modulated according to the sub-frame images data of three primary colours to produce the figure of three primary colours As light and non-image light.
- 4. optical projection system as claimed in claim 3, it is characterised in that：The light modulation system includes the first optical modulator, the Two optical modulators and the 3rd optical modulator, first optical modulator are used within a frame modulation period according to first base The sub-frame images data modulation of color is from the first primary lights of the even photosystem outgoing, and second optical modulator is in a frame The second primary lights being emitted in modulation period according to the sub-frame images data modulation of second primary colours from the even photosystem, institute State the 3rd optical modulator and be used for sub-frame images data modulation within a frame modulation period according to the three primary colours from described even The three primary colours light of photosystem outgoing.
- 5. optical projection system as claimed in claim 3, it is characterised in that：The control device is additionally operable to produce light source control signal With modulation control signal, the light source control signal is used to control first light source, secondary light source and the 3rd light source luminescent Sequential；The light modulation system includes an optical modulator, and the modulation control signal is used to control the optical modulator in a frame Sub-frame images data time division modulation in modulation period according to corresponding primary colours is from the first primary lights of the even photosystem outgoing, the Two primary lights and three primary colours light.
- 6. optical projection system as claimed in claim 5, it is characterised in that：The modulation control signal is specifically used for controlling the light Modulator a frame modulation period the first period according to first primary colours the modulation of sub-frame images data from the even spectrum Unite the first primary lights of outgoing, modulated in the second period of a frame modulation period according to the sub-frame images data of second primary colours From the second primary lights of the even photosystem outgoing, and a frame modulation period the 3rd period according to the three primary colours Three primary colours light of the sub-frame images data modulation from the even photosystem outgoing.
- 7. optical projection system as claimed in claim 4, it is characterised in that：The smooth recovery system includes three light recycling modules, Three smooth recycling modules correspond with first optical modulator, the second optical modulator, the 3rd optical modulator, the light Recycling module is used for the non-image light caused by the light modulator modulates by corresponding to and guided to the even photosystem.
- 8. optical projection system as claimed in claim 6, it is characterised in that：The smooth recovery system includes a light recycling module, The smooth recycling module is used to guide non-image light caused by the light modulator modulates to the even photosystem.
- 9. optical projection system as claimed in claim 7 or 8, it is characterised in that：The smooth recycling module is included by multiple speculums The speculum group of composition, the speculum group be used for by the non-image light incide the even photosystem light entrance face it Before be changed into and incide the even photosystem primary colours parallel light light；OrThe speculum group is used to control the non-image light in the incident angle of the light entrance face of the even photosystem so that enters The non-image light and primary lights for being mapped to the even photosystem are distributed in the incident angle of the light entrance face of the even photosystem Continuously.
- 10. the optical projection system as described in claim 4 or 6, it is characterised in that：Described image light is with the first polarization state Light, the non-image light are the light with the second polarization state, and first polarization state and second polarization state are polarization direction Two kinds of different polarization states；Be incident to the optical modulator primary lights be the 3rd polarization state light, the 3rd polarization state with First polarization state or second polarization state are identical；The optical modulator is transmission liquid crystal light valve, including for adjusting the polarization state for the light for inciding the optical modulator Liquid crystal layer and the relative plane of incidence and exit facet, the light of the optical modulator is incident to along perpendicular to the optical modulator The direction of the plane of incidence is incident, and described image light and the non-image light are produced after the light modulator modulates；Described image light It is emitted in the same direction from the exit facet of the optical modulator with the non-image light.
- 11. optical projection system as claimed in claim 10, it is characterised in that：The optical projection system also includes light directing arrangement, institute Stating light directing arrangement includes polarization beam splitter, the polarization beam splitter be used for transmission of first-polarization-state and the second polarization state it The light of one polarization state, and reflect the light of another polarization state；The image that the optical modulator is emitted by the polarization beam splitter Light and non-image light guide to different directions respectively.
- 12. the optical projection system according to claim 4 or 6, it is characterised in that：The optical modulator is digital micromirror device, Including multiple micro mirror units, the micro mirror unit in open state of the digital micromirror device will at least partly be incident to the number The light of word micro-mirror device reflects to form described image light, and the micro mirror unit in off status of the digital micromirror device will at least The light of portions incident to the digital micromirror device reflects to form the non-image light, described image light and the non-image light from It is emitted in the digital micromirror device along different directions.
- 13. optical projection system as claimed in claim 4, it is characterised in that：The optical projection system also includes light directing arrangement, described Light directing arrangement includes Multiplexing apparatus, and the Multiplexing apparatus is used for first optical modulator, the second optical modulator and the Image light caused by three light modulator modulates is emitted after being combined into light beam.
- 14. optical projection system as claimed in claim 6, it is characterised in that：The optical projection system also includes light directing arrangement, described Light directing arrangement includes Multiplexing apparatus, and the Multiplexing apparatus is used to launch first light source, secondary light source and the 3rd light source Light guide to the even photosystem.
- 15. optical projection system as claimed in claim 14, it is characterised in that：The Multiplexing apparatus includes the first closing light element and the Two closing light elements, the first closing light element are used for the two of which in first light source, secondary light source and the 3rd light source The light of light source transmitting is guided to the first light path, it is incident to the second closing light element along first light path；Described second Closing light element is used for the light for launching another light source in first light source, secondary light source and the 3rd light source and described in The incident light of first light path is guided to the second light path, it is incident to the even photosystem along second light path.
- 16. the optical projection system as described in claim 4 or 6, it is characterised in that：The even photosystem comprises at least dodging device, The dodging device includes light entrance face, for receiving first primary lights, the second primary lights and three primary colours light and institute Non-image light is stated, and even light is carried out to it, makes its homogenization.
- 17. optical projection system as claimed in claim 16, it is characterised in that：The even photosystem includes three even light dresses Put, three dodging devices correspond with first light source, secondary light source, the 3rd light source, and the dodging device is used for The primary lights and the non-image light of corresponding primary colours that light source corresponding to reception is launched, and the light to receiving carries out even light.
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| CN201720972936.XU CN207164451U (en) | 2017-08-04 | 2017-08-04 | Optical projection system |
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| CN201720972936.XU CN207164451U (en) | 2017-08-04 | 2017-08-04 | Optical projection system |
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