CN104898363B - Light-emitting device and relevant projecting system - Google Patents

Light-emitting device and relevant projecting system Download PDF

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Publication number
CN104898363B
CN104898363B CN201510264426.2A CN201510264426A CN104898363B CN 104898363 B CN104898363 B CN 104898363B CN 201510264426 A CN201510264426 A CN 201510264426A CN 104898363 B CN104898363 B CN 104898363B
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China
Prior art keywords
light
light source
solid state
area
filter area
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CN201510264426.2A
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Chinese (zh)
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CN104898363A (en
Inventor
李屹
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深圳市光峰光电技术有限公司
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Priority to CN201510264426.2A priority Critical patent/CN104898363B/en
Priority to CN201210277083.XA priority patent/CN102854733B/en
Publication of CN104898363A publication Critical patent/CN104898363A/en
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Publication of CN104898363B publication Critical patent/CN104898363B/en

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Abstract

The embodiment of the invention discloses a kind of light-emitting device and optical projection systems, which is characterized in that including:It is emitted the first solid state light emitter of the first color of light;It is emitted the second solid state light emitter of the second color of light;Above two light is merged into same light path by Multiplexing apparatus;Filtering apparatus including the first filter area and the second filter area transmits at least partly light of the first color of light and at least partly light of the second color of light respectively, includes the first spoke area therebetween;Driving device for driving filtering apparatus to move so that the first filter area and the second filter area are periodically located on the emitting light path of Multiplexing apparatus;Control the light source control device of two light source states, when so that hot spot being at least partially disposed at the non-spoke area of the first filter area or the second filter area, first solid state light emitter or the second solid state light emitter are only opened respectively, and when hot spot is fully located at the first spoke area, two light sources are switched on.An embodiment of the present invention provides improve brightness and be emitted the light-emitting device of polychrome sequence light.

Description

Light-emitting device and relevant projecting system
It is August 6 in 2012 that the present invention, which is based on the applying date, application No. is 201210277083.X, entitled hair The division of electro-optical device and relevant projecting system.
Technical field
The present invention relates to illumination and display technology fields, more particularly to a kind of light-emitting device and relevant projecting system.
Background technology
The principle of existing optical projection system is that the image of three kinds of primary colours is projected to respectively on same screen, and in human eye Generate the complete image of Overlay.Usually there are two types of schemes for optical projection system, and one is three independent light-modulating cells simultaneously Three primary colours are modulated, and project to same screen.Such as white light is divided into red, blue, green three coloured light by one group of optical filter, and Respectively by LCD (Liquid Crystal Display, liquid crystal display) panels or DMD (Digital Micro mirror Device digital micromirror elements) it modulates to generate image and project;Another solution is:One light-modulating cell receives The sequence light of three kinds of primary colours simultaneously modulates generation image, and in the case where the frequency that the image of three primary colours switches is sufficiently fast, human eye is not The variation of image primary lights can be aware of but it is seen that the complete image of synthesis.
Sequence radiant in the prior art is often made of white light source and filtering apparatus, for example, UHP (Ultra High Power, ultra high power) light bulb and rotation multistage optical filtering colour wheel.Optical filtering colour wheel be a kind of filter set at dish-style fill It sets, the white light that white light source generates is incident on the optical filter of multistage optical filtering colour wheel, and optical filter has the characteristic that selection penetrates, can White light is filtered into monochromatic light.When optical filtering colour wheel will rotate sufficiently fast, the switching between the image three-colo(u)r finally projected can To avoid discovering for human eye.
The solid state light emitters such as LED have the advantages that environmental protection and energy saving, with long service life, just gradually as a kind of novel light source Replace traditional UHP light bulbs and is applied to projection field.Fig. 1 is a kind of structural schematic diagram of light-emitting device in the prior art, As shown in Figure 1, light-emitting device includes first solid state light emitter 101, and the second solid state light emitter 102, third solid state light emitter 103, closing light dress Set 104, optic modulating device 105, apparatus for transmitting signal 106, light source control device 107.First solid state light emitter 101, the second solid-state Light source 102, third solid state light emitter 103 are respectively red-light LED, green light LED and blue-ray LED, and three passes through light source control device 107 controls and sequential illumination and its emergent light be emitteds after Multiplexing apparatus 104 merges into same light path as three color sequence lights.It should Three color sequence lights are incident on light-modulating cell 105 through lens collection, which is DMD.Light-modulating cell 105 is right The incident light of different colours is modulated, and the image for generating three colors is emitted to view field's synthesis complete image.
But it is the problem of optical projection system shown in Fig. 1:Traditional DMD is that the colour wheel being directed to is designed, because The time for the spoke light that DMD generates colour wheel is had in the control program of this DMD, and time setting cannot be zero.Work as light When spot is incident on the seam crossing of two different optical filters of colour wheel, the light generated after filtering is not some solid state light emitter emergent light Color, but adjacent filtered region crosses the mixed light of optical filtering, which is exactly spoke light, when generating spoke light where hot spot Region be spoke area.And in the prior art, in the time for being used to handle spoke light for DMD, light source control device 107 controls Three light sources make it all in off state, avoid DMD by the emergent light of Multiplexing apparatus 104 be modulated and caused by image Color saturation and grayscale problem.But since spoke area can generally account for 10% to the 20% of colour wheel region, herein Period close light source can cause being substantially reduced for light-emitting device brightness, it is relatively high to brightness requirement for some and to the face of image The light source of color saturation occasion of less demanding, existing optical projection system cannot meet its requirement.
Invention content
The invention mainly solves the technical problem of providing it is a kind of can improve brightness and be emitted polychrome sequence light shine Device and optical projection system.
An embodiment of the present invention provides a kind of light-emitting devices, which is characterized in that including:
A kind of light-emitting device, which is characterized in that including:
First solid state light emitter, the first solid state light emitter is for being emitted the first color of light;
Second solid state light emitter, second solid state light emitter is for being emitted the second color of light;
Multiplexing apparatus, for receiving the first color of light, the second color of light and merging into same light path outgoing to it;
Filtering apparatus, the filtering apparatus include adjacent the first filter area and the second filter area, also include at least the first side Boundary line, first boundary line are the tactile line of the side edge of the first filter area and the second filter area;
Driving device, the driving device is for driving filtering apparatus cycle movement so that the first of filtering apparatus is filtered Area is periodically located on the emitting light path of Multiplexing apparatus emergent light with the second filter area;
Light source control device, the break-make for controlling first solid state light emitter and the power supply of the second solid state light emitter so that entering Penetrate that hot spot is located at the first filter area and when not in contact with the first boundary line, first solid state light emitter is kept it turned on, the second solid-state Light source in launching spot is located at the second filter area and not in contact with the first boundary line when keeps it turned on, and is contacted in launching spot When to the first boundary line, first solid state light emitter is kept it turned on the second solid state light emitter.
The embodiment of the present invention also provides optical projection system, which is characterized in that including above-mentioned light-emitting device.
Compared with prior art, the present invention includes following advantageous effect:
First solid state light emitter sends out different colours light respectively with the second solid state light emitter, and can be combined by Multiplexing apparatus together One light path is emitted to filtering apparatus.Filtering apparatus cycle movement under the drive of the drive so that pair on filtering apparatus Answer the first filter area and the second filter area in turn be located at emitting light path on, light source control device for control first solid state light emitter with Second solid state light emitter is turned on and off state so that is at least partially disposed at the non-spoke area of the first filter area in launching spot When, only first solid state light emitter is kept it turned on, when launching spot is at least partially disposed at the non-spoke area of the second filter area, Only the second solid state light emitter is kept it turned on, therefore can ensure that emergent light is sequence light.In launching spot completely into When one spoke area, first solid state light emitter is kept it turned on the second solid state light emitter, therefore at least in a spoke area, Spoke light is will produce, is modulated for follow-up DMD, the brightness of projection is improved.
Description of the drawings
Fig. 1 is the structural front view of one embodiment of light-emitting device in the prior art;
Fig. 2 a are the structure left view of one embodiment of light-emitting device in the embodiment of the present invention;
Fig. 2 b are the left views of the filtering apparatus of light-emitting device shown in Fig. 2 a;
Fig. 2 c are the angular distribution figure in each non-spoke area in table 1.
Fig. 2 d are light source control device respectively to the state of a control schematic diagram of first solid state light emitter;
Fig. 2 e are light source control device respectively to the state of a control schematic diagram of the second solid state light emitter;
Fig. 2 f are that filtering apparatus is finally emitted sequence light schematic diagram;
Fig. 2 g are detection device and driving device, the relation schematic diagram of filtering apparatus in Fig. 2 a light-emitting devices;
Fig. 3 a are the structural schematic diagrams of the first solid state light emitter of light-emitting device shown in Fig. 2 a;
Fig. 3 b are the structural schematic diagrams of another of first solid state light emitter light-emitting component shown in Fig. 3 a;
Fig. 3 c are another structural schematic diagrams of the first solid state light emitter of light-emitting device shown in Fig. 3 a;
Fig. 3 d are another structural schematic diagrams of the first solid state light emitter of light-emitting device shown in Fig. 3 a;
Fig. 4 a are the structural schematic diagrams of another embodiment of light-emitting device in the embodiment of the present invention;
Fig. 4 b are the structures of the first solid state light emitter of light-emitting device, the second solid state light emitter, third solid state light emitter shown in Fig. 4 a Schematic diagram;
Fig. 4 c are the left views of the filtering apparatus of light-emitting device shown in Fig. 4 a;
Fig. 4 d are the angular distribution figure in each non-spoke area in table 1.
Fig. 4 e are light source control device respectively to the state of a control schematic diagram of first solid state light emitter;
Fig. 4 f are light source control device respectively to the state of a control schematic diagram of the second solid state light emitter;
Fig. 4 g are light source control device respectively to the state of a control schematic diagram of third solid state light emitter;
Fig. 4 h are that filtering apparatus is finally emitted sequence light schematic diagram;
Fig. 5 a are the structural schematic diagrams of another embodiment of light-emitting device in the embodiment of the present invention;
Fig. 5 b are the left views of the filtering apparatus of light-emitting device shown in Fig. 5 a;
Fig. 5 c are the angular distribution figure in each non-spoke area in table 2.
Fig. 5 d are light source control device respectively to the state of a control schematic diagram of first solid state light emitter;
Fig. 5 e are light source control device respectively to the state of a control schematic diagram of the second solid state light emitter;
Fig. 5 f are light source control device respectively to the state of a control schematic diagram of third solid state light emitter;
Fig. 5 g are that filtering apparatus is finally emitted sequence light schematic diagram;
Fig. 5 h are the yellow light schematic diagrames of the outgoing of light-emitting device shown in Fig. 5;
Fig. 6 a are the structural schematic diagrams of another embodiment of light-emitting device in the embodiment of the present invention;
Fig. 6 b are the left views of the filtering apparatus of light-emitting device shown in Fig. 6 a;
Fig. 6 c are a kind of structural schematic diagrams of the first solid state light emitter of light-emitting device shown in Fig. 6 a;
Fig. 6 d are another structural schematic diagrams of the first solid state light emitter of light-emitting device shown in Fig. 6 a.
Specific implementation mode
The embodiment of the present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
Embodiment one
Fig. 2 a are the structural front view of one embodiment of the light-emitting device of the present invention, as shown in Figure 2 a, light-emitting device 200 Including first solid state light emitter 210, the second solid state light emitter 220, Multiplexing apparatus 230, filtering apparatus 240, driving device 250, light source Control device 260.
First solid state light emitter 210 is used to be emitted the second color of light for being emitted the first color of light, the second solid state light emitter 220, The first solid state light emitter 210 and the second solid state light emitter 220 respectively include blue-ray LED array and yellow light LED array.Fig. 3 a are first The structural schematic diagram of solid state light emitter 210, as shown in Figure 3a, first solid state light emitter 210 include that light-emitting device array 31b and collimation are saturating Lens array 31a, the light-emitting device array are blue-ray LED array, the LED and collimator lens array 31a in blue-ray LED array 31b Middle collimation lens corresponds, and the collimated lens array 31a of emergent light of blue-ray LED array is collected and is emitted after collimating.Second Solid state light emitter 220 is identical as 210 structure of first solid state light emitter.
And in other embodiment of the invention, the LED in Fig. 3 a can be replaced with other elements.Fig. 3 b are Fig. 3 a first Another structural schematic diagram of the light-emitting component 31b of solid state light emitter 210, as shown in Figure 3b, light-emitting component includes phosphor powder layer 32a, LED chip 32b, substrate 32c.Phosphor powder layer 32a is coated in the upper surface of LED chip 32b, and phosphor powder layer 32a absorbs LED core The light of piece 32b outgoing simultaneously is excited to generate exciting light.The lower surface of LED chip 32b is fixed on substrate 32c.Specifically, first is solid LED chip 32b is ultraviolet leds in state light source 210, and phosphor powder layer 32a is blue light fluorescent powder and receives LED chip 32b outgoing Ultraviolet light generate blue stimulated light.In fact, in other embodiment of the invention, LED chip 32b and phosphor powder layer 32a Other types can be set, and the two, which matches, generates stimulated light, such as blue-ray LED excitation green emitting phosphor generates green and is excited Light has higher efficiency relative to green light LED.Including phosphor powder layer 32a and LED chip 32b and substrate 32c groups here, At more than two light-emitting components can form an array or the structure light-emitting element and form mixing array with LED chip, And collimation lens is arranged to collimate come the light for sending out above-mentioned array, entirety can be used as a light source applications in first Solid state light emitter 210.
In other embodiments of the present invention, first solid state light emitter 210 can also be other types of light sources.Fig. 3 c are first Another structural schematic diagram of solid state light emitter 210, as shown in Figure 3c, first solid state light emitter 210 include single chip LED chip 33b with Collimation lens 33a.Single chip LED chip 33b can customize the size and shape needed for obtaining by producer, thus size can be done To bigger, possess larger light-emitting surface.Here collimation lens 33a can also be other devices with collimating effect, Such as total internal reflection lens and Fresnel Lenses etc..In addition, single chip LED chip 33b here can also be substituted for Fig. 3 b institutes The structure shown covers phosphor powder layer on the surface of single chip LED chip.Relative to LED array, light-source structure goes out shown in Fig. 3 c Light is penetrated more to concentrate and uniformly, but due to needing LED chip customized, cost higher.
Fig. 3 d are another structural schematic diagram of first solid state light emitter 210, and as shown in Figure 3d, first solid state light emitter 210 is wrapped Include excitation light source 35a, Wavelength converter 35b and collection device 35c.Excitation light source 210 generates exciting light, and is incident to wavelength Conversion equipment 35b generates stimulated light, which is emitted after collection device 35c is collected.Excitation light source 35a can be laser two The light sources such as pole pipe or LED.Wavelength converter 35b includes the wavelength conversion layer for being provided with wavelength conversion material, wavelength convert Material is specially fluorescent powder.In other embodiment of the invention, wavelength conversion material is also possible to be quantum dot, fluorescent dye etc. Material with wavelength conversion capability, however it is not limited to fluorescent powder.It is formed relative to laser diode or diode laser matrix Laser light source, what excitated fluorescent powder equiwavelength's transition material generated, which be excited brightness, is significantly larger than Fig. 3 a, institute in Fig. 3 b, 3c Show the brightness of light source.Wavelength converter 35b can also include driving device, for driving wavelength conversion layer periodic rotary, So that the hot spot that exciting light is formed on the wavelength conversion layer acts on the wavelength conversion layer along predefined paths, it is long to avoid laser The problem of time effect wavelength conversion layer temperature caused by the same position of wavelength conversion layer increases.In the other realities of the present invention It applies in mode, driving device can also drive Wavelength converter to move in other ways, such as horizontal reciprocating movement etc..
Fig. 3 a, Fig. 3 c, scheme is all based on solid-state light source technology shown in Fig. 3 d, but the citing in the present embodiment is not The present invention is caused to limit, other solid state light emitters can be equally used in the present embodiment.In addition, in other embodiment of the present invention In, the second solid state light emitter 220 equally can be any one in the light-source structure in said program, and first solid state light emitter 210 can select to use as needed with the emergent light color of the second solid state light emitter 220.In addition, for first light source, the second light The case where spectrum of source emergent light is wide spectrum optical, emergent light can be modified using subsequent filtering apparatus, remove it not The light of the spectral region needed.
The present embodiment neutralizing light device 230 receives the blue light that first solid state light emitter 210 is emitted and goes out with the second solid state light emitter 220 The yellow light penetrated simultaneously is merged into being emitted from same light path, and Multiplexing apparatus 230 here is specially interferometric filter, interference filter Mating plate 230 can reflect blue light transmission yellow light.Certainly, if first solid state light emitter 210 and the position of the second solid state light emitter 220 are set It changes, the optical property of interferometric filter 230, which should correspond to, is set as transmission blu-ray reflection yellow light.
In the prior art, spoke area is incidence in the period for the boundary line that launching spot touches adjacent filter area Region where hot spot, and the region in filter area except spoke area is non-spoke area.But in some specific applications, In view of being set with there may be error to spoke area, above-mentioned spoke area can be expanded a certain range to non-spoke, depending on Justice be new spoke area, this stylish spoke area exterior domain be unfiltered area.In the present invention, the range of definition in spoke area is not The control method of the light source of the present invention is impacted.It states and is illustrated for the former in spoke area definition herein above. Fig. 2 b are the structure left view of filtering apparatus, and as shown in Figure 2 b, which filters including the first filter area 241 and second Light area 242, the first filter area are used to transmit at least partly light of the first color of light and reflect other light, and the second filter area is for saturating It penetrates at least partly light of the second color of light and reflects other light, include at least between the first filter area 241 and the second filter area 242 One spoke area, the spoke area are the first spoke area 243.
When launching spot is fully located in the first spoke area 243, the emergent light in the first spoke area 243 is blue light and yellow light Mixed light, as spoke light.In the present embodiment, the first filter area 241 and the second filter area 242 are annular, are wrapped therebetween Another spoke area in addition to the first spoke area 243 is included, is the second spoke area 244, and when the first filter area 241 and second is filtered It, therebetween can only be there are one spoke area when light area 242 is the shapes such as rectangle.
Driving periodical rotational motion of the filtering apparatus 240 in driving device 250 so that the first of filtering apparatus 240 Filter area 241 and the second filter area 242 are periodically located in the light path of 230 emergent light of Multiplexing apparatus, and the first spoke area 243 Periodically it is located on the emitting light path.Here the motion mode of filtering apparatus 240 is periodically to rotate, the present invention its In its embodiment, motion mode can also be that other motion modes, such as periodicity level move back and forth, as long as ensureing not Same filter area is periodically located at the emitting light path of Multiplexing apparatus 230.
The state of first solid state light emitter 210 and the second solid state light emitter 220 being turned on and off is to pass through light source control device 260 controls.Unlatching and the pass of light source can be controlled by controlling the on/off of LED chip for the light source comprising LED It closes;For the light source of excitated fluorescent powder, the open and close of light source are controlled by controlling the on/off of excitation light source.With light Spot is starting point when coming into contact with the boundary line between the first filter area 241 and the second filter area 242 in the first spoke area 243, Angle is zero at this time, and the angular range shared by the first spoke area 243 and the second spoke area 244 is respectively 20 degree.Fig. 2 c are to filter The schematic diagram of 240 rotation period of device, as shown in Figure 2 c 201 indicate the period in the first filter area non-spoke area, and 202 indicate second The period in filter area non-spoke area, the region between 201 and 202 are the period where spoke area.Fig. 2 d and Fig. 2 e are first The state of a control schematic diagram of solid state light emitter 210 and the second solid state light emitter 220, wherein 1 indicates open state, 0 indicates closed state. When launching spot is at least partially disposed at the first filter area non-spoke area, 260 control first solid state light emitters of light source control device 210 keep it turned on, when launching spot is at least partially disposed at the second filter area non-spoke area, light source control device 260 The second solid state light emitter 220 is controlled to keep it turned on, when launching spot is fully located in spoke area 244, light source control dress 260 are set so that first solid state light emitter 210 and the second solid state light emitter 220 are all kept it turned on.As shown in figure 2f, filtering apparatus 240 will be emitted blue monochromatic light, non-wheel of the filtering apparatus 240 in the second filter area 242 in the non-spoke area of the first filter area 241 Spoke area will be emitted yellow color light, and the spoke area 244 between the first filter area 241 and the second filter area 242 will be emitted blue With the mixed light of yellow, i.e. spoke light.When launching spot is gradually transitions from the first filter area 241 mistake of second filter area 242 Cheng Zhong, since launching spot is completely into the first spoke area, the emergent light of filtering apparatus 240 will become blue from blue monochromatic light The mixed light of light and yellow light, and the ratio of yellow component is increasing.When hot spot is at least partially into the second filter area 242 When non-spoke area, the emergent light of filtering apparatus 240 will become yellow color light.When launching spot is gradual from the second filter area 242 During being transitioned into the first filter area 241, situation is similar therewith.
It is worth noting that the case where for spoke area to be enlarged, for example, as shown in Figure 2 b, by the second spoke area 244 expand as the second spoke area 245, keep first solid state light emitter 210 and the state of a control of the second solid state light emitter 210 constant, this Shi Erzhe only difference is that:In first filter area 241, the region between the first spoke area 244 and the second spoke area 245 is by only There is first solid state light emitter 210 to light to become first solid state light emitter 210 and light simultaneously with the second solid state light emitter 220, but at this time should Can only be by the emergent light of first solid state light emitter 210, therefore in region, there is no change for the emergent light in the region.It is filtered to second In light area 241, the region between the first spoke area 244 and the second spoke area 245 is analyzed, also, it was found that the region goes out Light is penetrated there is no changing, thus regardless of whether being enlarged to original spoke area after be new spoke area, all do not interfere with it and go out Light effect.
The emergent light of filtering apparatus 240 is the emergent light of light-emitting device 200, the emergent light will be guided by follow up device to Optic modulating device 201 is modulated.In general optic modulating device 201 is DMD, have fixed modulation spoke light modulation period Period.In compared with the existing technology, within the spoke light modulation period of DMD, light source is closed, and light-emitting device is not emitted any Light, the light-emitting device in the present embodiment can be emitted spoke light during this period, and be incident on DMD and be modulated.This implementation Example light-emitting device simulates spoke light using filtering apparatus, is applied in projection, to improve the brightness of projection, and has The advantages of being easily achieved.
Light-emitting device 200 in the present embodiment can also include detection device 270, which filters for detecting Regional location on electro-optical device 240 in light path and one position signal of generation, and the position signal is transferred to light source control Device 260.Light source control device 260 receives position signal and controls first solid state light emitter 210 and second according to the position signal The unlatching of solid state light emitter 220 and on off operating mode.For example, as shown in Figure 2 g, it is black that one is arranged in the shaft 251 of driving device 250 Vitta band, detection device 270 is sensor, when sensor 270 detects black stripe, will generate a position signal and gives light source control Device 260 processed.For example, the position signal is high voltage signal, believe for low pressure when sensor 270 does not detect black stripe Number.When sensor 270 detects the position of black stripe, the regional location that filtering apparatus 240 is in light path is corresponding determination, Such as launching spot corresponds to the position that the second filter area 242 is initially entered from the first filter area 241 of filtering apparatus 240 at this time It sets, light source control device 260 will open the second solid state light emitter 220.Detection device 270 can be to the filtering apparatus in each period Generation position signal when 240 fixed a certain position enters light path, can make light source control device 260 more accurately control 210 and second solid state light emitter 220 of first solid state light emitter processed.
Preferably, light-emitting device 200 further includes light adjusting apparatus 280, which collects Multiplexing apparatus 230 Emergent light and be emitted to filtering apparatus 240 after reducing its dispersion angle.Specifically, the angular adjustment apparatus in the present embodiment 280 be lens, which collects the emergent light of Multiplexing apparatus 230, and filtering apparatus 240 is incident to after adjustment, to reduce outgoing The dispersion angle of light so that the incident light for the wide-angle that part can be reflected originally is transmitted from filtering apparatus 240, to reduce because of filter Light loss caused by the angle drift characteristic of electro-optical device.In other embodiments, light adjusting apparatus 280 or CPC The integrating rod of (Compound Parabolic Concentrator, composite parabolic collector) or other forms can also be The optical device that can reduce beam divergence angle of the other forms such as taper square rod.
Embodiment two
Fig. 4 a are the structural schematic diagram of another embodiment of light-emitting device of the present invention, as shown in fig. 4 a, light-emitting device 400 Including first solid state light emitter 410, the second solid state light emitter 420, third solid state light emitter 430, Multiplexing apparatus 440, lens 450, light source Control device 460, filtering apparatus 470, driving device 490 and detection device 480.
Light-emitting device difference in embodiment shown in light-emitting device 400 and Fig. 2 a in the present embodiment is:
(1) in the present embodiment, light-emitting device 400 is in addition to including first solid state light emitter 410, the second solid state light emitter 420, also It include the third solid state light emitter 430 for being emitted third color of light.First solid state light emitter 401, the second solid state light emitter 420, third Solid state light emitter 430 is respectively red-light source, green-light source and blue light source.First solid state light emitter 410, the second solid state light emitter 420 Structure with third solid state light emitter 430 can be any one in the structure example of the first solid state light emitter 210 in embodiment one Kind.For example, as shown in Figure 4 b, first solid state light emitter 410 is LED array, the second solid state light emitter 420 is blue laser excitation green Phosphor source, third solid state light emitter 430 are single chip LED chip.
(2) Multiplexing apparatus 440 is by the outgoing of first solid state light emitter 410, the second solid state light emitter 420, third solid state light emitter 430 Light is merged into from same light path and is emitted, and Multiplexing apparatus 404 here is specially criss-cross optical filter.In other realities of the present invention It applies in mode, Multiplexing apparatus 404 can be other structures, such as optical filter disposed in parallel etc., can be according to the distribution of light source Specific setting.Can also be three or more light sources in addition, quantity of light source is also not limited to two in the present invention, they can be with Utilize the different different progress closing lights for carrying out closing light or spatial position of wavelength.Multiplexing apparatus as techniques well known, Details are not described herein again.
(3) Fig. 4 c are the structural schematic diagram of filtering apparatus 470 shown in Fig. 4 a, and as illustrated in fig. 4 c, filtering apparatus 470 wraps The first filter area 471, the second filter area 472 are included, third filter area 473 is respectively Red lightscreening plate, green color filter, indigo plant Colo(u)r filter.It include the first spoke area 474 between first filter area 471 and the second filter area 472.Second filter area 472 and Include a spoke area between three filter areas 473, is the second spoke area 475.First filter area 471 and third filter area 473 it Between include a spoke area, be third spoke area 476.Here start the first filter area of contact 471 with launching spot to filter with third It is starting point when boundary line between light area 473, filtering apparatus angle is 0 at this time, along clockwise direction the angle of each region point Cloth is as illustrated in chart 1:
Start angle/degree Terminal angle/degree
First filter area non-spoke area 10 90
First spoke area 90 110
Second filter area non-spoke area 110 220
Second spoke area 220 240
Third filter area non-spoke area 240 350
Third spoke area 350 370(10)
Table 1
Fig. 4 d are the angular distribution figure in each non-spoke area in table 1, as shown in figure 4d, in the first filter area non-spoke area Filtering apparatus 470 is emitted feux rouges in 471a, and filtering apparatus 470 is emitted green light in the second filter area non-spoke area 472a, the Filtering apparatus 470 is emitted blue light in three filter area non-spoke area 473a.Fig. 4 e~4g are light source control device 460 respectively to first The state of a control schematic diagram of solid state light emitter 410, the second solid state light emitter 420, third solid state light emitter 430, abscissa are filtering apparatus The angle of 470 rotations, ordinate indicate the state of light source voltage, and 1 indicates beginning state, and 0 indicates closed state, in launching spot When being at least partially disposed at the non-spoke area of the first filter area 471,460 control first solid state light emitters 410 of light source control device are protected Open state is held, feux rouges is emitted;When launching spot is at least partially disposed at the non-spoke area of the second filter area 472, light source control 460 the second solid state light emitters 420 of control of device are kept it turned on, and are emitted green light;It is entirely located in the first spoke in launching spot When area 474, light source control device 460 controls first solid state light emitter 410 and the second solid state light emitter 420 is all kept it turned on, and goes out Penetrate red green mixed light;When launching spot is at least partially disposed at the non-spoke area of third filter area 473, light source control device 460 Only control third solid state light emitter 430 is kept it turned on, and is emitted blue light;When launching spot is entirely located in the second spoke area 475, Light source control device 460 controls third solid state light emitter 430 and the second solid state light emitter 420 is all kept it turned on, and is emitted turquoise mixed Closing light;When being entirely located in third spoke area 476, light source control device 460 controls first solid state light emitter 410 and third solid-state light Source 430 is all kept it turned on, and is emitted red blue mixed light.Fig. 4 h are the finally outgoing sequence light schematic diagram of filtering apparatus 470, are such as schemed It is red in the emergent light of filtering apparatus 470 after hot spot enters the first spoke area 474 from the side of the first filter area 471 shown in 4h Light ingredient is gradually reduced, and green color components gradually increase, until hot spot is at least partially into the non-spoke area of the second filter area 472, Emergent light becomes green light.When hot spot enters the second spoke area 475 or third spoke area 476, situation is similar therewith.
The emergent light of filtering apparatus 470 can be incident to optic modulating device 401 and be modulated, which is DMD.The spoke light that DMD can be emitted the first spoke area 474, the second spoke area 475 and third spoke area 476 is adjusted System, so as to improve the brightness of projection.Compared with the existing technology in scheme within periods of the DMD to spoke light modulation, light source The case where being closed, in the present embodiment, when launching spot is entirely located in the first spoke area 474, light source control device 460 control first solid state light emitters 410 and the second solid state light emitter 420 are all kept it turned on, and just have spoke light outgoing, brightness Just have opposite raising.It is, of course, preferable to ground, when launching spot is entirely located in the second spoke area 475, light source control device 460 Control third solid state light emitter 430 and the second solid state light emitter 420 are all kept it turned on, and brightness can further increase.Similarly, exist When launching spot is entirely located in third spoke area 476, light source control device 460 controls first solid state light emitter 410 and third solid-state Light source 430 is all kept it turned on, and the brightness after DMD receives the emergent light of filtering apparatus 470 and projected can also improve.
In the present embodiment, when first solid state light emitter 410, the second solid state light emitter 420, third solid state light emitter 430 are all in most When high-power, the brightness of 470 emergent light of filtering apparatus is maximum, but due to the range of each filter area on filtering apparatus 470 Size is fixed, and the time scale of feux rouges, green light, blue light in 470 emergent light of filtering apparatus is fixed, and three is not necessarily proper White balance can be reached well, it is preferred that light source control device 460 can control first solid state light emitter 410, the second solid state light emitter 420 and third solid state light emitter 430 watt level, and realized by regulation power size different in adjustment filtering apparatus 470 The ratio of the luminous flux of color of light, to realize white balance appropriate, luminous flux here is the total light being emitted in a cycle Flux.Here, the power regulating method of light source includes:
A first solid state light emitter 410, the second solid state light emitter 420, third solid state light emitter 430) are obtained respectively in maximum power Under, the corresponding chromaticity coordinates (x of superposition spectrum of the emergent light of filtering apparatus 4701, y1);
B chromaticity coordinates (x) is calculated1, y1) and target light chromaticity coordinates (x0, y0) the distance between d0
C) obtain first solid state light emitter 410, the second solid state light emitter 420, third solid state light emitter 430 power individually drop When a low step-length and other two solid state light emitters remain unchanged, the corresponding color of superposition spectrum of 470 emergent light of filtering apparatus is sat Mark is respectively (xRi, yRi), (xGi, yGi), (xBi, yBi);
D chromaticity coordinates (x) is calculatedRi, yRi), (xGi, yGi), (xBi, yBi) and target color coordinates (x0, y0) between distance dRi, dGi, dBi
E) compare distance dRi, dGi, dBiSize, i is the integer more than or equal to 1, and selects the minimum value min in three (dRi, dGi, dBi) and min (dRi+1, dGi+1, dBi+1) be compared, if min (dRi, dGi, dBi) < min (dRi+1, dGi+1, dBi+1), It then chooses and obtains min (dRi, dGi, dBi) corresponding to each solid state light emitter power;If min (dRi, dGi, dBi)≥min(dRi+1, dGi+1, dBi+1), then this step further includes repeating step C to E, until until min (dRi, dGi, dBi) < min (dRi+1, dGi+1, dBi+1), selection obtains min (dRi, dGi, dBi) corresponding to each solid state light emitter power be required solid state light emitter power.
When setting initial i=1, min (dR1, dG1, dB1)=d0
Here step-length is the performance number successively decreased every time, which can be set according to actual conditions, such as be set For curent change 0.05A or curent change 5% etc.;It is appreciated that the step-length of the changed power of three kinds of solid state light emitters can not Together.By the above method, three optimal power parameters of solid state light emitter can be obtained, and pass through the control of light source control device 460 System realizes the optimum efficiency of 470 emergent light of filtering apparatus.In other embodiments of the present invention, the quantity of solid state light emitter can also It is not three, again may be by this method to adjust the ratio of different solid state light emitter emergent lights.
Embodiment three
Fig. 5 a are the structural schematic diagram of another embodiment of light-emitting device of the present invention.As shown in Figure 5 a, light-emitting device 500 Including first solid state light emitter 510, the second solid state light emitter 520, third solid state light emitter 530, Multiplexing apparatus 540, light regulating device 550, light source control device 560, filtering apparatus 570, detection device 580 and driving device 590.
In the present embodiment in light-emitting device 500 and Fig. 4 a illustrated embodiments light-emitting device the difference lies in that such as Fig. 5 b institutes Show, the filtering apparatus 570 in the present embodiment in addition to including the first filter area 571, the second filter area 572, third filter area 573, Further include the 4th filter area 574, the 4th filter area 574 includes yellow filter.First filter area 571 of filtering apparatus 570, Second filter area 572, third filter area 573, the 4th filter area 574 are periodically located at and close under the driving of driving device 590 In the light path of 540 emergent light of electro-optical device.Spoke area between second filter area 572 and the first filter area 571 is the first spoke area 575, spoke area between the second filter area 572 and the 4th filter area 574 is the second spoke area 576, third filter area 573 and the Spoke area between four filter areas 574 is third spoke area 577, the spoke between the first filter area 572 and third filter area 574 Area is fourth round spoke area 578.
Start the common boundary line institute of the first filter area of contact 571 and third filter area 573 with launching spot in Fig. 5 b Initial position in position, angle is 0 at this time, and along clockwise direction, the angle of each region distribution is as shown in table 2,
Start angle/degree Termination point/degree
First filter area non-spoke area 10 90
First spoke area 90 110
Second filter area non-spoke area 110 170
Second spoke area 170 190
Third filter area non-spoke area 190 220
Third spoke area 220 240
Third filter area non-spoke area 240 350
Fourth round spoke area 350 370(10)
Table 2
Fig. 5 c are the angular distribution figure in each non-spoke area in table 1, as shown in Figure 5 c, in the non-spoke area of the first filter area Filtering apparatus 570 is emitted feux rouges in 571a, and filtering apparatus 570 is emitted green light in the non-spoke area 572a of the second filter area, Filtering apparatus 570 is emitted blue light in the non-spoke area 573a of third filter area, is filtered in the non-spoke area 574a of the 4th filter area Electro-optical device 570 is emitted yellow light.Fig. 5 d~5f are light source control device 560 respectively to first solid state light emitter 510, the second solid state light emitter 520, the state of a control schematic diagram of third solid state light emitter 530, abscissa are the angle of filtering apparatus 570, and ordinate indicates power supply State, 1 indicate beginning state, 0 indicate closed state, unlike light-emitting device in Fig. 4 a, the in the present embodiment the 4th Filter area 574 is yellow light optical filter, and light source control device 560 needs to control first solid state light emitter 510 and the second solid state light emitter 520 It opens simultaneously so that the emergent light of Multiplexing apparatus 540 is yellow light, and therefore, hot spot enters the second spoke area from second area 572 When 576, light source control device 560 controls the second solid state light emitter 520 and is always maintained at open state, while first solid state light emitter 510 Open state is entered by closed state.When launching spot is at least partially disposed at the non-spoke area of the 4th filter area, the first solid-state Light source 510 and the second solid state light emitter 520 are always maintained at open state.When hot spot from the 4th filter area 574 completely into third When spoke area 577, second solid state light emitter of the control of light source control device 560 520 is always maintained at opening state with first solid state light emitter 510 State, third solid state light emitter 530 enter open state by closed state, and when hot spot part enters the non-of third filter area 573 When spoke area, light source control device 560 controls first solid state light emitter 510 and the second solid state light emitter 520 enters closed state, third Solid state light emitter is kept it turned on.
Fig. 5 g are the finally outgoing sequence light schematic diagram of filtering apparatus 570, as shown in fig. 5g, different from light-emitting device in Fig. 4 a , after hot spot enters the second spoke area 576 from the side of the second filter area 572, green light in the emergent light of filtering apparatus 570 Components unchanged, red color light component gradually increase, and until hot spot part enters the non-spoke area of the 4th filter area 574, the two is mixed into Yellow light.When hot spot from the side of the 4th filter area 574 completely into third spoke area 577 after, in the emergent light of filtering apparatus 570 Red color light component and green color components are reduced, and blue light ingredient gradually increases, and until hot spot is at least partially into third filter area 573, are gone out Penetrating light becomes blue light.Fig. 5 h are the yellow light schematic diagram that filtering apparatus 540 is emitted, and in the second spoke area 576, yellow light ratio is gradual Increase, when being at least partially into the non-spoke area of the 4th filter area 574, yellow light ratio reaches maximum, due to it for green light and The superposition of feux rouges, therefore the sum of the intensity that its intensity is green light and feux rouges, after completely into third spoke area 577, yellow light ratio Example is gradually decrease to zero.In the present embodiment, light-emitting device can be emitted the 4th kind of color of light:Yellow light, when the light-emitting device conduct Projection light source is in use, the brightness of projection can be significantly improved.It is worth noting that the Huang being emitted in the 4th filter area 574 What the green light that the feux rouges and the second solid state light emitter 520 being just emitted by first solid state light emitter 510 are emitted mixed, when first solid When state light source 510 and the second solid state light emitter 520 are all in maximum power, yellow light is likely to occur colour cast phenomenon, with ideal yellow light Chromaticity coordinates have deviation, it is preferred that the light source control device in the present embodiment can adjust first solid state light emitter 510 and The power of two solid state light emitters 520, in yellow light feux rouges and green light ratio be adjusted.In addition, can equally utilize here Method selects the optimum power value of solid state light emitter in embodiment two.
Certainly in other embodiments mode of the present invention, the 4th above-mentioned filter area emergent light can be other colors, as long as The color can by first solid state light emitter, the second solid state light emitter, third solid state light emitter any two or three synthesize, Such as red, blue, green three solid state light emitters synthesize white light.Similarly, light source control device can pass through the corresponding solid state light emitter of adjusting Power, the ratio of the different solid state light emitter emergent lights in emergent light to adjust the 4th filter area.
Example IV
Fig. 6 a are the structural schematic diagram of another embodiment of light-emitting device of the present invention.As shown in Figure 6 a, light-emitting device 600 Including first solid state light emitter 610, the second solid state light emitter 620, third solid state light emitter 630, Multiplexing apparatus 640, light adjusting apparatus 650, light source control device 660, filtering apparatus 670, detection device 680 and driving device 690.
In the present embodiment example shown in light-emitting device 600 and Fig. 4 a the difference lies in that as shown in Figure 6 b, in the present embodiment Filtering apparatus 670 include the first filter area 671, the second filter area 672, third filter area 673, the 4th filter area 674, the 5th Filter area 675, the 6th filter area 676.First filter area 671 respectively includes different Red lightscreening plates from the 4th filter area 674, And it transmits the light of first wavelength range and the light of second wave length range in 610 emergent light of first solid state light emitter respectively and reflects other Light, the second filter area 672 includes different green color filters from the 5th filter area 675, and can transmit the second solid-state light respectively The light of third wavelength range and the light of the 4th wave-length coverage in 620 emergent light of source and reflect other light, third filter area 673 and Six filter areas 676 include different blue color filters, and can transmit the 5th wavelength in 630 emergent light of third solid state light emitter respectively The light of range and the light of the 6th wave-length coverage and reflect other light.
Compared with light-emitting device shown in Fig. 4 a, the filtering apparatus 670 in the present embodiment is will to be filtered in example shown in Fig. 4 a Each filter area of electro-optical device is divided into two filter areas, the two filter areas can transmit the light of same color different wave length, And the control mode of light source is not changed in the present embodiment, i.e., light source control device 660 is at least partially disposed in launching spot When the non-spoke area of the 4th filter area 674, only controls first solid state light emitter 610 and keep it turned on, in launching spot at least portion When dividing positioned at the non-spoke area of the 5th filter area 675, only controls second solid state light emitter 620 and keep it turned on, in launching spot When being at least partially disposed at the non-spoke area of the 6th filter area 676, only controls third solid state light emitter 630 and keep it turned on.Therefore Outgoing is included the light of two groups of red bluish-green sequence lights by the light-emitting device 600 in the present embodiment, this two groups of sequence optical wavelength ranges are not Together, it can be used as 3D projection light sources.
First solid state light emitter 610 in the present embodiment is wide spectrum light source, and spectral wavelength ranges cover first wavelength range With second wave length range, the first filter area 671 can be penetrated and the second filter area 672 is emitted the light of two kinds of wave-length coverages respectively. Preferably, first solid state light emitter 610 includes the first light-emitting component and packet that outgoing includes the first color of light of first wavelength range Include the second light-emitting component of the first color of light of second wave length range.Fig. 6 c show the first solid state light emitter in the present embodiment 610 structural schematic diagrams, as fig. 6 c, first solid state light emitter 610 include light-emitting device array 611 and lens array 612, are shone Element arrays 611 include the first light-emitting component 611a and the second light-emitting component 611b, are specially LED, wherein the first luminous member Part 611a outgoing includes the light of first wavelength range, the second light-emitting component 611b be emitted include second wave length range light, two kinds The mixed light of light-emitting component is emitted to the first filter area 671 of filtering apparatus 670 and the 4th filter area 672 and transmits respectively wherein The light of first wavelength range and second wave length range.Fig. 6 d show the first solid state light emitter 610 in the present embodiment, and another is tied Structure schematic diagram, Fig. 6 d are that two groups of LED array carry out closing light, and two groups of LED respectively include the LED of the light of outgoing different wavelength range, It can be used as first solid state light emitter 610 in the present embodiment, and 610 emergent light of first solid state light emitter is through filtering apparatus 670 filtered spectrum are relatively narrow, and color saturation is higher.It is above-mentioned for the second solid state light emitter 620 and third solid state light emitter 630 Structure is equally applicable.
Preferably, light source control device 660 can individually control the state of the different light-emitting components in first solid state light emitter, In the first filter area 671 when in the light path of the emergent light of Multiplexing apparatus 640,660 controls first of light source control device shine Element 611a is in open state, in the 4th filter area 674 when in the light path of the emergent light of Multiplexing apparatus 640, light source control 660 the second light-emitting component 611b of control of device are in open state.By the above-mentioned means, the different optics member in solid state light emitter Part only works in the period for needing emergent light, reduces the power of solid state light emitter, improves work efficiency.It is easily understood that The above method can equally be well applied to the second solid state light emitter and third solid state light emitter.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The embodiment of the present invention also provides a kind of optical projection system, including light-emitting device, which can have above-mentioned each Structure in embodiment and function.Various shadow casting techniques, such as LCD projection technology, number may be used in the optical projection system Code light path processor (DLP, Digital Light Processor) shadow casting technique.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other Technical field is included within the scope of the present invention.

Claims (10)

1. a kind of light-emitting device, which is characterized in that including light source, light source control device, filtering apparatus, the second driving device and spy Device is surveyed,
The light source is for emitting at least two color of light;The light source includes first light source, and the first light source includes solid-state Light source and Wavelength converter;For the solid state light emitter for emitting exciting light, the Wavelength converter includes wavelength convert The wavelength conversion layer of material;The Wavelength converter includes first driving means, drives wavelength conversion layer periodic rotary, makes It obtains the hot spot that exciting light is formed on wavelength conversion layer and acts on wavelength conversion layer along predefined paths, for generating stimulated light;
The filtering apparatus is located in the light path of light source, including at least two filter areas, and each filter area allows a kind of color Light passes through;It include a spoke area between two neighboring filter area;
Second driving device is for driving filtering apparatus to move so that filter area is periodically located in the light path of light source;
The detection device is used to detect the position of filter area and spoke area, and generation position signal is filled to the light source control It sets;
The light source control device controls the open and close of light source according to position signal;
The light source further includes second light source and Multiplexing apparatus;
The Multiplexing apparatus is used to receive the light of first light source and second light source, and is synthesized in same light path;
The filtering apparatus includes the first filter area and the second filter area, and the first filter area allows at least portion that first light source is sent out Light splitting passes through, and the light that the second filter area allows second light source to send out passes through;
It include the first spoke area between first filter area and the second filter area;
When launching spot is fully located at the first spoke area, the first light source and second light source are all kept it turned on.
2. light-emitting device according to claim 1, which is characterized in that the wavelength conversion layer includes a phosphor region, described One phosphor region is corresponding with an at least filter area, and a filter area receives the light that sends out of a phosphor region, and allows a kind of color at least Part light passes through.
3. light-emitting device according to claim 1, which is characterized in that
Second driving device includes shaft, and the position that band corresponds to spoke area is arranged in the shaft;
The position of the detection band exports the position signal to light source control device;The position signal is height Voltage signal or low voltage signal.
4. light-emitting device according to claim 3, which is characterized in that
The band is black stripe;
The detection device is sensor, and when detecting position signal, detection device generates high voltage signal, otherwise generates low Signal;
The light source control device is used for when receiving high voltage signal, controls face corresponding with the adjacent filter area in spoke area The light source of color is opened;It is additionally operable to when receiving low voltage signal, control filter area allows the corresponding light of light of the color of transmission It opens in source.
5. light-emitting device according to claim 1, which is characterized in that
The light source control device is used to, when receiving high voltage signal corresponding to the first spoke area, control first light source and the Two light sources are opened;Be additionally operable to when receiving low voltage signal, control filter area allow by color light solid state light emitter It opens.
6. light-emitting device according to claim 5, which is characterized in that
The first light source is emitted sodium yellow;Second light source is emitted blue light;
First filter area allows at least partly sodium yellow to pass through, and reflects the light of other wavelength;Second filter area allows at least partly Blue light passes through, and reflects the light of other wavelength.
7. light-emitting device according to claim 3, which is characterized in that
It further include the third light source for emitting third color of light;Multiplexing apparatus is additionally operable to the light for sending out third light source and first light source The light and second light source sent out is sent out photosynthetic for the outgoing of light all the way;
The filtering apparatus further includes third filter area, and the third filter area allows third color of light to pass through;Third filter area It is adjacent with the second filter area, between include the second spoke area;
The shaft corresponds to and is provided with black stripe at the second spoke zone position;
When the light source control device receives high voltage signal corresponding to the second spoke area, second light source and third light source are controlled It opens;When receiving low voltage signal, control filter area allow by color light solid state light emitter open.
8. light-emitting device according to claim 7, which is characterized in that
The first light source emits red light;Second solid state light emitter emits green light;Third solid state light emitter emits blue light.
9. light-emitting device according to claim 8, which is characterized in that
The first light source is LED array;Second solid state light emitter is laser excitation green emitting phosphor;Third solid state light emitter is LED;
First filter area is Red lightscreening plate, the second filter area is green color filter, third filter area is blue color filter.
10. light-emitting device according to claim 8, which is characterized in that
The Multiplexing apparatus is criss-cross optical filter.
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