CN102645827A - Light source system and projecting apparatus - Google Patents
Light source system and projecting apparatus Download PDFInfo
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- CN102645827A CN102645827A CN2011103639390A CN201110363939A CN102645827A CN 102645827 A CN102645827 A CN 102645827A CN 2011103639390 A CN2011103639390 A CN 2011103639390A CN 201110363939 A CN201110363939 A CN 201110363939A CN 102645827 A CN102645827 A CN 102645827A
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Abstract
The invention relates to a light source system and a projecting apparatus. The light source system comprises a first light source, a second light source, an optical filter and a wavelength conversion apparatus. An incident angle of lights of a second spectrum range generated by the second light source on the optical filter is greater than a first angle threshold value and the lights are transmitted by the optical filter. The wavelength conversion apparatus transmits a part of the lights of the second spectrum range which is transmitted by the optical filter, and reflects the other part of the lights of the second spectrum range to the optical filter. The optical filter further reflects the other part of the lights of the second spectrum range to the wavelength conversion device, wherein the incident angle of the lights of the second spectrum on the optical filter is smaller than a second angle threshold value. The first angle threshold value is greater than the second angle threshold value. In such a way, the optical filter is set to transmit the lights of the second spectrum range which is generated by the second light source and has a big incident angle, and reflects the lights of the second spectrum angle which is reflected by the wavelength conversion device and has a small incident angle, so that the light-extraction efficiency of the light source system is improved.
Description
Technical field
The present invention relates to throw light on and show and the light sources technical field of usefulness particularly relate to a kind of light-source system and projection arrangement.
Background technology
At present, the color light source of high brightness need be used in many application scenarios, and is backlight etc. like light of stage, the projection display and RGB (red-green-blue).Wherein gas-discharge lamp (for example, ultrahigh pressure mercury lamp) is a kind of traditional higher source luminance that is applied to special lighting and shows the field.Yet because mercury causes environmental pollution easily, so industry is being sought a kind of environment-friendly type light source and is being replaced ultrahigh pressure mercury lamp.
See also Fig. 1, Fig. 1 is a kind of structural representation of light-source system of prior art.As shown in Figure 1, this light-source system comprises solid state light emitter 101, lens 103, colour wheel 104 and drive unit 106.Solid state light emitter 101 is used to produce an exciting light 102.Lens 103 are used for this exciting light 102 optically focused to colour wheel 104.The different sections of colour wheel 104 are provided with different fluorescent powder.Therefore, carrying out in the rotating process around turning axle 107 under the driving of drive unit 106 at colour wheel 104, exciting light 102 excites these fluorescent powder successively, and then produces colorama sequence 105.For example, fluorescent powder can comprise red light fluorescent powder, green light fluorescent powder and gold-tinted fluorescent powder.When the red light fluorescent powder district of colour wheel 104 turned on the travel path of exciting light 102, red light fluorescent powder received exciting of exciting light 102 and produces the ruddiness of high brightness.The production process of green glow and gold-tinted is identical with the production process of ruddiness.
Yet in existing fluorescent powder, the conversion efficiency of red light fluorescent powder is far below other fluorescent powder, therefore generally need carry out brightness to ruddiness and replenishes through adding light source.
See also Fig. 2, Fig. 2 is the structural representation of the light-source system of another kind of prior art.As shown in Figure 2, this light-source system comprises first light source 201, secondary light source 202, ruddiness conversion equipment 203 and beam split optical filter 204.The exciting light 205 that first light source 201 produces becomes ruddiness 206 through ruddiness conversion equipment (for example, being coated with the substrate of red light fluorescent powder) 203 wavelength Conversion, and through 204 transmissions of beam split optical filter.Secondary light source 202 can adopt red laser or red light-emitting diode.The ruddiness 207 that secondary light source 202 produces merges with ruddiness 206 after 204 reflections of beam split optical filter, thus ruddiness 206 is carried out brightness and replenishes.Yet; The spectral range high superposed of the ruddiness that the spectral range of the ruddiness that red laser or red light-emitting diode produce and red light fluorescent powder produce; Cause being difficult to design the ruddiness that desirable beam split optical filter comes abundant transmit red light fluorescent powder to produce; Therefore the ruddiness that simultaneously abundant reflect red laser instrument or red light-emitting diode produce cause the lot of energy loss, reduced the light extraction efficiency of light-source system.
See also Fig. 3, Fig. 3 is the structural representation of the light-source system of another prior art.As shown in Figure 3, this light-source system comprises first light source 301, secondary light source 302, ruddiness conversion equipment 303 and beam split optical filter 304.The exciting light 305 that the ruddiness 307 that secondary light source 302 produces and first light source 301 produce (for example; Blue light), beam split optical filter 304 incides ruddiness conversion equipment 303 after closing light; And through 303 transmissions of ruddiness conversion equipment, so that exciting light 305 is replenished through the ruddiness 306 that ruddiness conversion equipment 303 wavelength Conversion produce.Yet 303 pairs of ruddiness 307 of ruddiness conversion equipment have bigger reflectivity, are generally about 50%, can be turned back to secondary light source 302 along former road by the ruddiness 307 of ruddiness conversion equipment 303 reflections, thereby cause light extraction efficiency lower.In addition; Ruddiness conversion equipment 303 is isotropic with the ruddiness 306 that the wavelength Conversion mode produces, and except that a part of forward output, another part oppositely incides beam split optical filter 304; And by 304 transmissions of beam split optical filter or reflex to secondary light source 302, cause light extraction efficiency lower equally.
To sum up, a kind of light-source system and projection arrangement need be provided, to solve the ubiquitous above-mentioned technical matters of light-source system of prior art.
Summary of the invention
The technical matters that the present invention mainly solves provides a kind of light-source system and projection arrangement, to improve the light extraction efficiency of light-source system.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of light-source system is provided, comprises first light source, secondary light source, optical filter and first Wavelength converter.First light source is used to produce the light of first spectral range.Secondary light source is used to produce the light of second spectral range.Optical filter transmission incident angle is greater than the light of second spectral range of first angle threshold; The reflection incident angle is less than the light of second spectral range of second angle threshold; First angle threshold is greater than second angle threshold, and the incident angle of light on optical filter that shines second spectral range on the optical filter from secondary light source is greater than first angle threshold and through the optical filter transmission.First Wavelength converter converts the wavelength of light of first spectral range to the light of the 3rd spectral range; The further transmission of first Wavelength converter is through the part of the light of second spectral range of optical filter transmission, and the another part of light that reflects second spectral range is to optical filter.Optical filter further be reflected in incident angle on the optical filter less than another part of the light of second spectral range of second angle threshold to first Wavelength converter.
Wherein, the light of the light of second spectral range and the 3rd spectral range each other in the normalization spectrum energy of overlapped spectra greater than energy among both less 30%.
Wherein, the light of first spectral range is blue light, and the light of the light of second spectral range and the 3rd spectral range is ruddiness.
Wherein, first angle threshold is more than or equal to 40 degree and smaller or equal to 80 degree, and second angle threshold is more than or equal to 20 degree and smaller or equal to 60 degree.
Wherein, first angle threshold is more than or equal to 45 degree and smaller or equal to 65 degree, and second angle threshold is more than or equal to 30 degree and smaller or equal to 45 degree.
Wherein, light-source system further comprises light collecting device, and the light of second spectral range of secondary light source outgoing incides optical filter through light collecting device, to regulate the incident angle of light on optical filter of second spectral range through light collecting device.
Wherein, light collecting device is lens, regulates the incident angle of light on optical filter of second spectral range through the distance between the optical axis of regulating secondary light source and lens.
Wherein, optical filter further be reflected in incident angle on the optical filter less than the light of the 3rd spectral range of angular threshold value to first Wavelength converter.
Wherein, the peak wavelength of the light of second spectral range is greater than the peak wavelength of the light of the 3rd spectral range.
Wherein, the angular threshold value is more than or equal to 20 degree and smaller or equal to 60 degree.
Wherein, the angular threshold value is more than or equal to 30 and smaller or equal to 45.
Wherein, Optical filter transmission incident angle is less than the light of first spectral range of the 4th angle threshold; The reflection incident angle is greater than the light of first spectral range of the 5th angle threshold; The 4th angle threshold is less than the 5th angle threshold, and the incident angle of light on optical filter of first spectral range that shines optical filter from first light source is less than the 4th angle threshold, so that the light of first spectral range is transmitted on first Wavelength converter through optical filter.
Wherein, the 4th angle threshold is more than or equal to 2 degree and smaller or equal to 45 degree, and the 5th angle threshold is more than or equal to 7 degree and smaller or equal to 50 degree.
Wherein, the 4th angle threshold is more than or equal to 5 degree and smaller or equal to 20 degree, and the 5th angle threshold is more than or equal to 10 degree and smaller or equal to 25 degree.
Wherein, light-source system further comprises reflection unit, reflection unit reflection from the light of first spectral range of the first light source outgoing or from the light of second spectral range of secondary light source outgoing to optical filter.
Wherein, Reflection unit is the beam split optical filter; The beam split optical filter reflection light from the light of first spectral range of the first light source outgoing and transmission from second spectral range of secondary light source outgoing is to optical filter, and perhaps the light of transmission from the light of first spectral range of the first light source outgoing and reflection from second spectral range of secondary light source outgoing is to optical filter.
Wherein, Light-source system further comprises colour wheel and drive unit; Colour wheel comprises first section and second section; The optical filter and first Wavelength converter are arranged at first section, and drive unit drives colour wheel, so that first section and the second bulk period property are arranged on the transmission path of light of light and second spectral range of first spectral range; Second section is provided with second Wavelength converter or is arranged to the light of transmission first spectral range, and wherein second Wavelength converter converts the wavelength of light of first spectral range to the light of the 4th spectral range.
Wherein, Light-source system further comprises the colour wheel locating device; The colour wheel locating device detects the movement position of colour wheel; And producing the colour wheel synchronizing signal, secondary light source is opened when first section is arranged on the transmission path of light of second spectral range according to the colour wheel synchronizing signal, and when first section leaves on the transmission path of light of second spectral range, closes.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of light-source system is provided, comprises first light source, secondary light source, optical filter and first Wavelength converter.First light source is used to produce the light of first spectral range.Secondary light source is used to produce the light of second spectral range.Optical filter transmission incident angle is less than the light of second spectral range of first angle threshold; The reflection incident angle is greater than the light of second spectral range of second angle threshold; First angle threshold is less than second angle threshold, and the incident angle of light on optical filter that shines second spectral range on the optical filter from secondary light source is less than first angle threshold and through the optical filter transmission.First Wavelength converter converts the wavelength of light of first spectral range to the light of the 3rd spectral range; The further transmission of first Wavelength converter is through the part of the light of second spectral range of optical filter transmission, and the another part of light that reflects second spectral range is to optical filter.Optical filter further be reflected in incident angle on the optical filter greater than another part of the light of second spectral range of second angle threshold to first Wavelength converter.
Wherein, the light of the light of second spectral range and the 3rd spectral range each other in the normalization spectrum energy of overlapped spectra greater than energy among both less 30%.
Wherein, the light of first spectral range is blue light, and the light of the light of second spectral range and the 3rd spectral range is ruddiness.
Wherein, optical filter further be reflected in incident angle on the optical filter greater than the light of the 3rd spectral range of angular threshold value to first Wavelength converter.
Wherein, the peak wavelength of the light of second spectral range is less than the peak wavelength of the light of the 3rd spectral range.
Wherein, Optical filter transmission incident angle is less than the light of first spectral range of the 4th angle threshold; The reflection incident angle is greater than the light of first spectral range of the 5th angle threshold; The 4th angle threshold is less than the 5th angle threshold, and the incident angle of light on optical filter of first spectral range that shines optical filter from first light source is less than the 4th angle threshold, so that the light of first spectral range is transmitted on first Wavelength converter through optical filter.
Wherein, Light-source system further comprises colour wheel and drive unit; Colour wheel comprises first section and second section; The optical filter and first Wavelength converter are arranged at first section, and drive unit drives colour wheel, so that first section and the second bulk period property are arranged on the transmission path of light of light and second spectral range of first spectral range; Second section is provided with second Wavelength converter or is arranged to the light of transmission first spectral range, and wherein second Wavelength converter converts the wavelength of light of first spectral range to the light of the 4th spectral range.
Wherein, Light-source system further comprises the colour wheel locating device; The colour wheel locating device detects the movement position of colour wheel; And producing the colour wheel synchronizing signal, secondary light source is opened when first section is arranged on the transmission path of light of second spectral range according to the colour wheel synchronizing signal, and when first section leaves on the transmission path of light of second spectral range, closes.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of projection arrangement that comprises above-mentioned light-source system is provided.
The invention has the beneficial effects as follows: the situation that is different from prior art; By the way; Light-source system of the present invention and projection arrangement are arranged to the light of transmission by second spectral range of secondary light source generation and wide-angle incident with optical filter; And reflection is by the light of second spectral range of Wavelength converter reflection and low-angle incident; Perhaps optical filter is arranged to the light of transmission by second spectral range of secondary light source generation and low-angle incident; And reflection is by the light of second spectral range of Wavelength converter reflection and wide-angle incident, can the light of second spectral range of Wavelength converter reflection be reused, and then improved the light extraction efficiency of light-source system.
Description of drawings
Fig. 1 is the structural representation of a kind of light-source system of prior art;
Fig. 2 is the structural representation of the another kind of light-source system of prior art;
Fig. 3 is the structural representation of another light-source system of prior art;
Fig. 4 is the structural representation of first embodiment of light-source system of the present invention;
Fig. 5 is the spectrum synoptic diagram of light-source system shown in Figure 4;
Fig. 6 is the structural representation of second embodiment of light-source system of the present invention;
Fig. 7 is the structural representation of the 3rd embodiment of light-source system of the present invention;
Fig. 8 is the structural representation of the 4th embodiment of light-source system of the present invention;
Fig. 9 is the structural representation of the 5th embodiment of light-source system of the present invention;
Figure 10 is the front view of the colour wheel of light-source system shown in Figure 9;
Figure 11 is the structural representation of the 6th embodiment of light-source system of the present invention
Figure 12 is the structural representation of the 7th embodiment of light-source system of the present invention;
Figure 13 is the front view of the colour wheel of light-source system shown in Figure 12;
Figure 14 is the spectrum synoptic diagram of light-source system shown in Figure 11.
Embodiment
See also Fig. 4, Fig. 4 is the structural representation of first embodiment of light-source system of the present invention.As shown in Figure 4, the light-source system of present embodiment mainly comprises first light source 401, secondary light source 402, light collecting device 403, optical filter 404 and Wavelength converter 405.
The light 407 of second spectral range that secondary light source 402 produces incides optical filter 404 behind light collecting device 403 relayings.Optical filter 404 is arranged to the light 407 of transmission incident angle greater than second spectral range of first angle threshold, and the reflection incident angle is less than the light of second spectral range of second angle threshold, and wherein first angle threshold is greater than second angle threshold.The incident angle of light 407 on optical filter 404 that shines second spectral range on the optical filter 404 from secondary light source 402 be greater than first angle threshold, and then after optical filter 404 transmissions, incide Wavelength converter 405.The part of light 407 that incides second spectral range on the Wavelength converter 405 is through Wavelength converter 405 transmissions, and then as the output of output light.The another part that incides the light 407 of second spectral range on the Wavelength converter 405 is reflected by Wavelength converter 405, and then incides optical filter 404 again with various incident angles.
By the way; Optical filter 404 is arranged to second spectral range of optical filter 404 is incided in transmission by secondary light source 402 generations and wide-angle light 407; And the light 407 of second spectral range of optical filter 404 is incided in reflection by Wavelength converter 405 reflections and low-angle; The major part of the light 407 of second spectral range that feasible script loses is recycled again, and then has improved the efficient of light-source system.
In the present embodiment, regulate from the incident angle of light 407 on optical filter 404 of second spectral range of secondary light source 402 outgoing, so that it is greater than first angle threshold through light collecting device 403.For example, the light collecting device 403 of present embodiment is lens, regulates the incident angle of light 407 on optical filter 404 of second spectral range through the distance between the optical axis of regulating secondary light source 402 and lens 403.Wherein, the distance between the optical axis of secondary light source 402 and lens 403 is big more, and the incident angle of light 407 on optical filter 404 of second spectral range is just big more.In other embodiments, also can regulate the incident angle of light 407 on optical filter 404 of second spectral range, so that it is greater than first angle threshold through other modes.
In the present embodiment, second spectral range and the 3rd spectral range are overlapped at least, carry out brightness with the light 408 of 407 pairs the 3rd spectral ranges of light of utilizing second spectral range and replenish.Preferably, the light 408 of the light 407 of second spectral range and the 3rd spectral range each other in the normalization spectrum energy of overlapped spectra greater than energy among both less 30%.For example; First light source 401 is blue laser or blue light-emitting diode; The light 406 of first spectral range of its generation is blue light, and secondary light source 402 is red laser or red light-emitting diode, and the light 407 of second spectral range of its generation is ruddiness; Wavelength converter 405 is provided with red light fluorescent powder, and the light 408 that its light 406 to first spectral range carries out the 3rd spectral range of wavelength Conversion generation is ruddiness.In other embodiments; First light source 401 can be the light source that can produce other suitable wavelength coverage light with secondary light source 402; And Wavelength converter 405 also can be provided with other material for transformation of wave length, and second spectral range and the 3rd spectral range can be not overlapping yet.
In the present embodiment, optical filter 404 can adopt the interfere type optical filter.Interfere type optical filter principle is on transparent substrates, alternately to plate the rete of establishing different refractivity, utilizes the interference effect of light between above-mentioned rete to come the light of different spectral ranges is produced different transmission or reflecting effect.
See also Fig. 5, Fig. 5 is the spectrum synoptic diagram of light-source system shown in Figure 4.As shown in Figure 5, optical filter 404 is a band resistance optical filter, and the optical filtering spectral line of optical filter 404 can change along with the incident angle of light and change.Specifically, when the incident angle of light became big gradually, its optical filtering spectral line drifted about to short wavelength's direction along with the increase of incident angle gradually.In Fig. 5; It is the optical filtering spectral line of 0 degree, 10 degree, 30 degree, 45 degree and 60 optical filters 404 when spending that curve 500,501,502,503,504 is represented incident angle respectively, and curve 506,507,508 is represented the curve of spectrum of light 408 of light 407 and the 3rd spectral range of light 406, second spectral range of first spectral range respectively.Can know by Fig. 5; For the light 407 of second spectral range, when incident angle is spent greater than 60, the optical filter 404 basic light 407 of transmission second spectral range fully; When incident angle was spent less than 45, optical filter 404 reflected the light 407 of second spectral range basically fully.For the light 408 of the 3rd spectral range, when incident angle was spent less than 45, most of spectral components of the light 408 of the 3rd spectral range was reflected, and a spot of spectral components is only arranged by transmission.Therefore, as understood by one of ordinary skill in the art, that is carried among the present invention comprises part transmission and partial reflection to transmission and reflection.Can know like Fig. 5, preferably the peak wavelength of the light 407 of second spectral range is arranged to the peak wavelength greater than the light 408 of the 3rd spectral range, and then improve the reflecting effect of the light 408 of the 3rd spectral range.
In addition, because Wavelength converter 405 when the part of the light 406 of first spectral range is carried out wavelength Conversion, can reflect another part of light 406 of first spectral range equally to optical filter 404.Therefore, in the present embodiment, optical filter 404 can further be arranged to the light 406 of transmission incident angle less than first spectral range of the 4th angle threshold, and the reflection incident angle is greater than the light 406 of first spectral range of the 5th angle threshold.Wherein, the 4th angle threshold is less than the 5th angle threshold.The incident angle of light 406 on optical filter 404 of first spectral range that shines optical filter 404 from first light source 401 is less than the 4th angle threshold, so that the light 406 of first spectral range is transmitted on the Wavelength converter 405 through optical filter 404.And from Wavelength converter 405 reflected back optical filters 404 and the incident angle on optical filter 404 greater than the light 406 of first spectral range of the 5th angle threshold by optical filter 404 reflected back wavelength conversion equipments 405, realized the recycling of the light 406 of first spectral range thus.
As shown in Figure 5; For the light 406 of first spectral range, when incident angle is spent less than 45, the optical filter 45 basic light 406 of transmission first spectral range fully; And when incident angle was spent greater than 60, optical filter 45 reflected the light 406 of first spectral range basically fully.
In the present embodiment; First angle threshold be preferably more than equal 40 the degree and smaller or equal to 80 the degree; More preferably more than or equal to 45 the degree and smaller or equal to 65 the degree, second angle threshold be preferably more than equal 20 the degree and smaller or equal to 60 the degree, more preferably more than or equal to 30 the degree and smaller or equal to 45 the degree; The angular threshold value be preferably more than equal 20 the degree and smaller or equal to 60 the degree; More preferably 30 the degree and smaller or equal to 45 the degree, the 4th angle threshold be preferably 2 the degree and smaller or equal to 45 the degree, more preferably 5 the degree and smaller or equal to 20 the degree.The 4th angle threshold is preferably 7 degree and smaller or equal to 50 degree, more preferably 10 spend and spend smaller or equal to 25.
See also Fig. 6, Fig. 6 is the structural representation of second embodiment of light-source system of the present invention.As shown in Figure 6, the light-source system of present embodiment mainly comprises first light source 601, secondary light source 602, light collecting device 603, optical filter 604 and Wavelength converter 605.The difference part of the light-source system of present embodiment and first embodiment shown in Figure 4 is that the light-source system of present embodiment further comprises reflection unit 609.The light 606 of first spectral range that reflection unit 609 reflections first light source 601 produces is to optical filter 604.Certainly, in other embodiments, reflection unit 609 also can be designed to reflect the light 607 of second spectral range that secondary light source 602 produces.
See also Fig. 7, Fig. 7 is the structural representation of the 3rd embodiment of light-source system of the present invention.As shown in Figure 7, the light-source system of present embodiment mainly comprises first light source 701, secondary light source 702, light collecting device 703, optical filter 704, Wavelength converter 705 and reflection unit 709.The difference part of the light-source system of present embodiment and second embodiment shown in Figure 6 is; The reflection unit 709 of present embodiment is the beam split optical filter; Make the light 706 of first spectral range that reflection unit 709 reflections first light source 701 produces arrive optical filter 704, the light 707 of second spectral range that the secondary light source of transmission simultaneously 702 produces is to optical filter 704.At this moment, because that the spectral range of the light 706 of first spectral range and the light 707 of second spectral range does not exist is overlapping, so can come to realize fully above-mentioned functions through design reflectivity device 709 suitably.Certainly, in other embodiments, reflection unit 709 also can be designed to reflect the light 707 of second spectral range that secondary light source 702 produces to optical filter 704, and the light 706 of first spectral range that first light source 701 of transmission simultaneously produces is to optical filter 704.
See also Fig. 8, Fig. 8 is the structural representation of the 4th embodiment of light-source system of the present invention.As shown in Figure 8, the light-source system of present embodiment mainly comprises first light source 801, secondary light source 802, light collecting device 803, optical filter 804 and Wavelength converter 805.The difference part of the light-source system of present embodiment and first embodiment shown in Figure 4 is that the light 806 direct wide-angles of first spectral range that first light source 801 of present embodiment produces incide on the optical filter 804.Certainly, in other embodiments, the light 806 of first spectral range that first light source 801 produces also directly wide-angle incide on the Wavelength converter 805.
See also Fig. 9 and Figure 10, Fig. 9 is the structural representation of the 5th embodiment of light-source system of the present invention, and Figure 10 is the front view of the colour wheel in the light-source system shown in Figure 9.Like Fig. 9 and shown in Figure 10, the light-source system of present embodiment mainly comprises first light source 901, secondary light source 902, light collecting device 903, colour wheel 904 and drive unit 905.Colour wheel 904 comprises first section 9041 and second section 9042.First light source 901 produces the light 911 of first spectral range, and secondary light source 902 produces the light 912 of second spectral range.The light 911 of first spectral range and the light 912 of second spectral range incide on the colour wheel 904 through light collecting device 903.Drive unit 905 drives colour wheels 904, so that first section 9041 and second section, 9042 periodicity are arranged on the transmission path of light 912 of light 911 and second spectral range of first spectral range.Wherein, First section 9041 is provided with the optical filter of describing in the foregoing description 906 and Wavelength converter 907; Make that when first section 9041 is arranged on the transmission path of light 912 of light 911 and second spectral range of first spectral range light 913 that optical filter 906 and Wavelength converter 907 produce the 3rd spectral range with above-described mode is the light 912 of transmission second spectral range also.
Further; Second section 9042 of present embodiment is provided with Wavelength converter 909; Wavelength converter 909 becomes light 911 wavelength Conversion of first spectral range of incident the light (not shown) of the 4th spectral range; Along with the rotation of colour wheel 904, first section 9041 and second section 9042 are exported the colorama sequence of different colours respectively thus.In the present embodiment, Wavelength converter 909 can be provided with green light fluorescent powder or gold-tinted fluorescent powder etc.In other embodiments, second section 9042 can be arranged at least two, to carry above-mentioned fluorescent powder or other fluorescent powder respectively.In addition, when the light 911 of first spectral range can be used for follow-up demonstration and uses, second section 9042 also can be arranged to the light 911 of transmission first spectral range.
In the present embodiment; Second section 9042 can also further be provided with optical filter 908; The light 911 of optical filter 908 transmissions first spectral range; And reflect, and then realize the recycling again of the light of the 4th spectral range from the light of Wavelength converter 909 towards the 4th spectral range of optical filter 908 outputs.Certainly, optical filter 908 can also further be arranged to reflect the light 912 of second spectral range, avoids the interference of light of 912 pairs the 4th spectral ranges of light of second spectral range.
The light-source system of present embodiment further comprises colour wheel locating device 910.Colour wheel locating device 910 detects the movement position of colour wheel 904; And generation colour wheel synchronizing signal; Secondary light source 902 is opened when first section 9041 is arranged on the transmission path of light 912 of second spectral range according to the colour wheel synchronizing signal; And when first section 9041 leaves on the transmission path of light 912 of second spectral range, close, avoid the waste of the light 912 of second spectral range, further improved the efficient of light-source system thus.
See also Figure 11, Figure 11 is the structural representation of the 6th embodiment of light-source system of the present invention.Shown in figure 11, the light-source system of present embodiment mainly comprises first light source 1001, secondary light source 1002, optical filter 1004 and Wavelength converter 1005.First light source 1001 produces the light 1006 of one first spectral range.Secondary light source 1002 produces the light 1007 of one second spectral range.Wavelength converter 1005 becomes light 1006 wavelength Conversion of first spectral range light 1008 of the 3rd spectral range.
The difference part of the light-source system of present embodiment and first embodiment shown in Figure 4 is; The optical filter 1004 transmission incident angles of present embodiment are less than the light 1007 of second spectral range of first angle threshold, and the reflection incident angle is greater than the light 1007 of second spectral range of second angle threshold.Wherein, first angle threshold is less than second angle threshold.The incident angle of light 1007 on optical filter 1004 of second spectral range that shines optical filter 1004 from secondary light source 1002 is less than first angle threshold and through optical filter 1007 transmissions.Wavelength converter 1005 further transmissions are through the part of the light 1007 of second spectral range of optical filter 1004 transmissions, and the another part of light 1007 that reflects second spectral range is to optical filter 1004.Optical filter 1004 further be reflected in incident angle on the optical filter 1004 greater than another part of the light 1007 of second spectral range of second angle threshold to Wavelength converter; Can realize recycling thus, improve the light extraction efficiency of light-source system the light 1007 of second spectral range of Wavelength converter 1005 reflection.
Further, second spectral range and the 3rd spectral range are overlapped at least, and the light 1008 of the light 1007 of preferred second spectral range and the 3rd spectral range each other in the normalization spectrum energy of overlapped spectra greater than energy among both less 30%.For example; First light source 1001 is blue laser or blue light-emitting diode; The light 1006 of first spectral range of its generation is blue light, and secondary light source 1002 is red laser or red light-emitting diode, and the light 1007 of second spectral range of its generation is ruddiness; Wavelength converter 1005 is provided with red light fluorescent powder, and the light 1008 that its light 1006 to first spectral range carries out the 3rd spectral range of wavelength Conversion generation is ruddiness.In other embodiments; First light source 1001 can be the light source that can produce other suitable wavelength coverage light with secondary light source 1002; And Wavelength converter 1005 also can be provided with other material for transformation of wave length, and second spectral range and the 3rd spectral range can be not overlapping yet.
Further; Optical filter 1004 be arranged to be reflected in incident angle on the optical filter 1004 greater than the light of the 3rd spectral range of angular threshold value 1008 to Wavelength converter 1005; Realize thus improving the light extraction efficiency of light-source system to from the oppositely recycling of the light 1008 of the 3rd spectral ranges of output of Wavelength converter 1005.
Further, optical filter 1004 is designed to the light 1006 of transmission incident angle less than first spectral range of the 4th angle threshold, and the reflection incident angle is greater than the light 1006 of first spectral range of the 5th angle threshold.Wherein, the 4th angle threshold is less than the 5th angle threshold.The incident angle of light 1006 on optical filter 1004 of first spectral range that shines optical filter 1004 from first light source 1001 is less than the 4th angle threshold, so that the light 1006 of first spectral range of first light source, 1001 outgoing is transmitted on the Wavelength converter 1005 through optical filter 1004.From Wavelength converter 1005 reflected back optical filters 1004 and the incident angle on optical filter 1004 greater than the light 1006 of first spectral range of the 5th angle threshold by optical filter 1004 reflected back wavelength conversion equipments 1005; Realize the recycling of the light 1006 of first spectral range thus, improved the light extraction efficiency of light-source system.
See also Figure 14, Figure 14 is the spectrum synoptic diagram of light-source system shown in Figure 11.Shown in figure 14, the optical filtering spectral line of optical filter 1004 can change along with the incident angle of light and change.Specifically, when the incident angle of light became big gradually, its optical filtering spectral line drifted about to short wavelength's direction along with the increase of incident angle gradually.In Figure 14; It is the optical filtering spectral line of 10 degree and 30 optical filters 1004 when spending that curve 1403 and 1404 is represented incident angle respectively, and curve 1406,1407,1408 is represented the curve of spectrum of light 1008 of light 1007 and the 3rd spectral range of light 1006, second spectral range of first spectral range respectively.Can know by Figure 14; For the light 1007 of second spectral range, when incident angle is spent less than 10, the optical filter 1004 basic light 1007 of transmission second spectral range fully; When incident angle was spent greater than 30, optical filter 1004 reflected the light 1007 of second spectral range basically fully.For the light 1008 of the 3rd spectral range, when incident angle was spent greater than 30, most of spectral components of the light 1008 of the 3rd spectral range was reflected, and a spot of spectral components is only arranged by transmission.In the present embodiment, preferably the peak wavelength of the light 1007 of second spectral range is arranged to the peak wavelength less than the light 1008 of the 3rd spectral range, and then improves the reflecting effect of the light 1008 of the 3rd spectral range.For the light 1006 of first spectral range; When incident angle is spent less than 10; The optical filter 1004 basic light 1006 of transmission first spectral range fully, and when incident angle was spent greater than 30, optical filter 1004 reflected the light 1006 of first spectral range basically fully.
See also Figure 12 and Figure 13, Figure 12 is the structural representation of the 7th embodiment of light-source system of the present invention, and Figure 13 is the front view of the colour wheel in the light-source system shown in Figure 12.Like Figure 12 and shown in Figure 13, the light-source system of present embodiment mainly comprises first light source 1101, secondary light source 1102, colour wheel 1104 and drive unit 1105.Colour wheel 1104 comprises first section 11041 and second section 11042.First light source 1101 produces the light 1111 of first spectral range, and secondary light source 1102 produces the light 1112 of second spectral range.The light 1111 of first spectral range and the light 1112 of second spectral range incide on the colour wheel 1104.Drive unit 1105 drives colour wheels 1104, so that first section 11041 and second section, 11042 periodicity are arranged on the transmission path of light 1112 of light 1111 and second spectral range of first spectral range.Wherein, First section 11041 is provided with the optical filter of describing among above-mentioned the 6th embodiment 1106 and Wavelength converter 1107; Make that when first section 11041 is arranged on the transmission path of light 1112 of light 1111 and second spectral range of first spectral range light 1113 that optical filter 1106 and Wavelength converter 1107 produce the 3rd spectral range with the mode of preceding text the 6th embodiment description is the light 1112 of transmission second spectral range also.
Further; Second section 11042 of present embodiment is provided with Wavelength converter 1109; Wavelength converter 1109 becomes light 1111 wavelength Conversion of first spectral range of incident the light (not shown) of the 4th spectral range; Along with the rotation of colour wheel 1104, first section 11041 and second section 11042 are exported the colorama sequence of different colours respectively thus.In the present embodiment, Wavelength converter 1109 can be provided with green light fluorescent powder or gold-tinted fluorescent powder etc.In other embodiments, second section 11042 can be arranged at least two, to carry above-mentioned fluorescent powder or other fluorescent powder respectively.In addition, when the light 1111 of first spectral range can be used for follow-up demonstration and uses, second section 11042 also can be arranged to the light 1111 of transmission first spectral range.
In the present embodiment; Second section 11042 can also further be provided with optical filter 1108; The light 1111 of optical filter 1108 transmissions first spectral range; And reflect, and then realize the recycling again of the light of the 4th spectral range from the light of Wavelength converter 1109 towards the 4th spectral range of optical filter 1108 outputs.Certainly, optical filter 1108 can also further be arranged to reflect the light 1112 of second spectral range, avoids the interference of light of 1112 pairs the 4th spectral ranges of light of second spectral range.
The light-source system of present embodiment further comprises colour wheel locating device 1110.Colour wheel locating device 1110 detects the movement position of colour wheel 1104; And generation colour wheel synchronizing signal; Secondary light source 1102 is opened when first section 11041 is arranged on the transmission path of light 1112 of second spectral range according to the colour wheel synchronizing signal; And when first section 11041 leaves on the transmission path of light 1112 of second spectral range, close, avoid the waste of the light 1112 of second spectral range, further improved the efficient of light-source system thus.
The invention still further relates to a kind of projection arrangement, the light-source system of this projection arrangement adopts the light-source system of the above embodiment of the present invention.
By the way; Light-source system of the present invention and projection arrangement are arranged to the light of transmission by second spectral range of secondary light source generation and wide-angle incident with optical filter; And reflection is by the light of second spectral range of Wavelength converter reflection and low-angle incident; Perhaps optical filter is arranged to the light of transmission by second spectral range of secondary light source generation and low-angle incident; And reflection is by the light of second spectral range of Wavelength converter reflection and wide-angle incident, can the light of second spectral range of Wavelength converter reflection be reused, and then improved the light extraction efficiency of light-source system.In addition, the present invention recycles through the light to the 3rd spectral range of the light of first spectral range of Wavelength converter reflection and the reverse output of Wavelength converter, has further improved the light extraction efficiency of light-source system.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (27)
1. a light-source system is characterized in that, said light-source system comprises:
First light source is used to produce the light of first spectral range;
Secondary light source is used to produce the light of second spectral range;
Optical filter; Said optical filter transmission incident angle is greater than the light of said second spectral range of first angle threshold; The reflection incident angle is less than the light of said second spectral range of second angle threshold; Said first angle threshold is greater than said second angle threshold, and the incident angle of light on said optical filter that shines said second spectral range on the said optical filter from said secondary light source is greater than said first angle threshold and through said optical filter transmission;
First Wavelength converter; Said first Wavelength converter converts the wavelength of light of said first spectral range to the light of the 3rd spectral range; The further transmission of said first Wavelength converter is through the part of the light of said second spectral range of said optical filter transmission; And the another part that reflects the light of said second spectral range arrives said optical filter
Wherein, said optical filter further be reflected in incident angle on the said optical filter less than another part of the light of said second spectral range of said second angle threshold to said first Wavelength converter.
2. light-source system according to claim 1 is characterized in that, the light of the light of said second spectral range and said the 3rd spectral range each other in the normalization spectrum energy of overlapped spectra greater than energy among both less 30%.
3. light-source system according to claim 2 is characterized in that, the light of said first spectral range is blue light, and the light of the light of said second spectral range and said the 3rd spectral range is ruddiness.
4. light-source system according to claim 1 is characterized in that, said first angle threshold is more than or equal to 40 degree and smaller or equal to 80 degree, and said second angle threshold is more than or equal to 20 degree and smaller or equal to 60 degree.
5. light-source system according to claim 4 is characterized in that, said first angle threshold is more than or equal to 45 degree and smaller or equal to 65 degree, and said second angle threshold is more than or equal to 30 degree and smaller or equal to 45 degree.
6. light-source system according to claim 1; It is characterized in that; Said light-source system further comprises light collecting device; The light of said second spectral range of said secondary light source outgoing incides said optical filter through said light collecting device, to regulate the incident angle of light on said optical filter of said second spectral range through said light collecting device.
7. light-source system according to claim 6; It is characterized in that; Said light collecting device is lens, regulates the incident angle of light on said optical filter of said second spectral range through the distance between the optical axis of regulating said secondary light source and said lens.
8. light-source system according to claim 1 is characterized in that, said optical filter further be reflected in incident angle on the said optical filter less than the light of said the 3rd spectral range of angular threshold value to said first Wavelength converter.
9. light-source system according to claim 8 is characterized in that the peak wavelength of the light of said second spectral range is greater than the peak wavelength of the light of said the 3rd spectral range.
10. light-source system according to claim 8 is characterized in that, said angular threshold value is more than or equal to 20 degree and smaller or equal to 60 degree.
11. light-source system according to claim 10 is characterized in that, said angular threshold value is more than or equal to 30 and smaller or equal to 45.
12. light-source system according to claim 1; It is characterized in that; Said optical filter transmission incident angle is less than the light of said first spectral range of the 4th angle threshold; The reflection incident angle is greater than the light of said first spectral range of the 5th angle threshold; Said the 4th angle threshold is less than said the 5th angle threshold, and the incident angle of light on said optical filter of said first spectral range that shines said optical filter from said first light source is less than said the 4th angle threshold, so that the light of said first spectral range is transmitted on said first Wavelength converter through said optical filter.
13. light-source system according to claim 12 is characterized in that, said the 4th angle threshold is more than or equal to 2 degree and smaller or equal to 45 degree, and said the 5th angle threshold is more than or equal to 7 degree and smaller or equal to 50 degree.
14. light-source system according to claim 13 is characterized in that, said the 4th angle threshold is more than or equal to 5 degree and smaller or equal to 20 degree, and said the 5th angle threshold is more than or equal to 10 degree and smaller or equal to 25 degree.
15. light-source system according to claim 1; It is characterized in that; Said light-source system further comprises reflection unit, the reflection of said reflection unit from the light of said first spectral range of the said first light source outgoing or from the light of said second spectral range of said secondary light source outgoing to said optical filter.
16. light-source system according to claim 15; It is characterized in that; Said reflection unit is the beam split optical filter; The light of said beam split optical filter reflection from the light of said first spectral range of the said first light source outgoing and transmission from said second spectral range of said secondary light source outgoing is to said optical filter, and perhaps the light of transmission from the light of said first spectral range of the said first light source outgoing and reflection from said second spectral range of said secondary light source outgoing is to said optical filter.
17. light-source system according to claim 1; It is characterized in that; Said light-source system further comprises colour wheel and drive unit; Said colour wheel comprises first section and second section; Said optical filter and said first Wavelength converter are arranged at said first section, and said drive unit drives said colour wheel, so that said first section and the said second bulk period property are arranged on the transmission path of light of light and said second spectral range of said first spectral range; Said second section is provided with second Wavelength converter or is arranged to the light of said first spectral range of transmission, and wherein said second Wavelength converter converts the wavelength of light of said first spectral range to the light of the 4th spectral range.
18. light-source system according to claim 17; It is characterized in that; Said light-source system further comprises the colour wheel locating device, and said colour wheel locating device detects the movement position of said colour wheel, and produces the colour wheel synchronizing signal; Said secondary light source is opened when said first section is arranged on the transmission path of light of said second spectral range according to said colour wheel synchronizing signal, and when said first section leaves on the transmission path of light of said second spectral range, closes.
19. a light-source system is characterized in that, said light-source system comprises:
First light source is used to produce the light of first spectral range;
Secondary light source is used to produce the light of second spectral range;
Optical filter; Said optical filter transmission incident angle is less than the light of said second spectral range of first angle threshold; The reflection incident angle is greater than the light of said second spectral range of second angle threshold; Said first angle threshold is less than said second angle threshold, and the incident angle of light on said optical filter that shines said second spectral range on the said optical filter from said secondary light source is less than said first angle threshold and through said optical filter transmission;
First Wavelength converter; Said first Wavelength converter converts the wavelength of light of said first spectral range to the light of the 3rd spectral range; The further transmission of said first Wavelength converter is through the part of the light of said second spectral range of said optical filter transmission; And the another part that reflects the light of said second spectral range arrives said optical filter
Wherein, said optical filter further be reflected in incident angle on the said optical filter greater than another part of the light of said second spectral range of said second angle threshold to said first Wavelength converter.
20. light-source system according to claim 19 is characterized in that, the light of the light of said second spectral range and said the 3rd spectral range each other in the normalization spectrum energy of overlapped spectra greater than energy among both less 30%.
21. light-source system according to claim 20 is characterized in that, the light of said first spectral range is blue light, and the light of the light of said second spectral range and said the 3rd spectral range is ruddiness.
22. light-source system according to claim 19 is characterized in that, said optical filter further be reflected in incident angle on the said optical filter greater than the light of said the 3rd spectral range of angular threshold value to said first Wavelength converter.
23. light-source system according to claim 22 is characterized in that, the peak wavelength of the light of said second spectral range is less than the peak wavelength of the light of said the 3rd spectral range.
24. light-source system according to claim 19; It is characterized in that; Said optical filter transmission incident angle is less than the light of said first spectral range of the 4th angle threshold; The reflection incident angle is greater than the light of said first spectral range of the 5th angle threshold; Said the 4th angle threshold is less than said the 5th angle threshold, and the incident angle of light on said optical filter of said first spectral range that shines said optical filter from said first light source is less than said the 4th angle threshold, so that the light of said first spectral range is transmitted on said first Wavelength converter through said optical filter.
25. light-source system according to claim 19; It is characterized in that; Said light-source system further comprises colour wheel and drive unit; Said colour wheel comprises first section and second section; Said optical filter and said first Wavelength converter are arranged at said first section, and said drive unit drives said colour wheel, so that said first section and the said second bulk period property are arranged on the transmission path of light of light and said second spectral range of said first spectral range; Said second section is provided with second Wavelength converter or is arranged to the light of said first spectral range of transmission, and wherein said second Wavelength converter converts the wavelength of light of said first spectral range to the light of the 4th spectral range.
26. light-source system according to claim 25; It is characterized in that; Said light-source system further comprises the colour wheel locating device, and said colour wheel locating device detects the movement position of said colour wheel, and produces the colour wheel synchronizing signal; Said secondary light source is opened when said first section is arranged on the transmission path of light of said second spectral range according to said colour wheel synchronizing signal, and when said first section leaves on the transmission path of light of said second spectral range, closes.
27. a projection arrangement is characterized in that, said projection arrangement comprises any described light-source system like claim 1-26.
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: APPOTRONICS Corp.,Ltd. Address before: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee before: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. |
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address before: 518000 3rd floor Fangda Building, Nanshan Science Park, Shenzhen, Guangdong Province Patentee before: APPOTRONICS Corp.,Ltd. |
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