CN104991406B - A light source system, lighting device and projection device - Google Patents

Abstract

The invention discloses a light source system, a lighting device and a projection device. The light source system comprises a color wheel and a light path merging system. The color wheel is used for receiving at least two incident light beams at different positions and correspondingly outputting at least two emergent light beams. The light path merging system is used for merging the light paths of the at least two emergent light beams. The color wheel is provided with a first area which receives first incident light and performs wavelength conversion on the first incident light in order to produce first emergent light. By adopting the scheme, the number of the color wheel is reduced substantially, the size of the light source system is reduced effectively, and the cost of the light source system is lowered effectively.

Description

A light source system, lighting device and projection device

This application is a divisional application with the application number 201110355290.8 submitted by the applicant on November 10, 2011, and the title of the invention is "a light source system, lighting device and projection device".

technical field

The invention relates to the field of optics, in particular to a light source system, an illuminating device and a projection device.

Background technique

Multi-color light sources are widely used in various applications such as projection display and stage lighting. As shown in FIG. 1 , in a prior art light source system, the excitation light generated by the excitation light source 102 is condensed by a lens 103 and then incident on a color wheel 104 . The color wheel 104 is respectively provided with a plurality of phosphor regions along the circumferential direction, such as a green phosphor region, a red phosphor region and a blue phosphor region. The fluorescent color wheel 104 rotates under the drive of the driving device 105, so that the above-mentioned areas on the color wheel 104 are alternately arranged on the transmission path of the excitation light generated by the excitation light source 102, and then the excitation light incident on it is converted into green light , red or blue light, forming a sequence of colored light. The above colored light sequence is further used for subsequent projection display.

The color images produced on the screen come from the integral effect of the rapid switching of images of different colors on the screen in the human eye. If the switching speed of images of different colors on the screen is not fast enough, it will cause color breakup (colorbreakup), that is, with the blink of an eye or the movement of the field of view, the audience can see monochromatic light instantaneously. In the above solution, the switching speed is proportional to the rotational speed of the driving device 105 that drives the color wheel 104 to rotate. Due to the speed limitation of the driving device 105, the phenomenon of color splitting cannot be solved.

As shown in FIG. 2, in another light source system of the prior art, three excitation light beams 201A, 201B, and 201C generated by three independent excitation light sources (not shown) are respectively incident on three beams painted with different colors. The phosphors on the color wheels 202A, 202B and 202C respectively excite the phosphors on the corresponding color wheels 202A, 202B and 202C, thereby generating three beams of received light with different colors. The three beams of received light are combined by the light splitting filters 203B and 203C, and collected by the light collecting device 204 . Since each color wheel 202A, 202B and 202C only generates light of a single color, and its wavelength conversion characteristics do not change with time, it is only necessary to alternately turn on and off the corresponding excitation light source to obtain a color light sequence. However, in the above solution, three color wheels 202A, 202B and 202C are needed, which increases the volume of the light source system, which is not conducive to the miniaturization of the light source system and increases the cost of the light source system.

Contents of the invention

The technical problem mainly solved by the present invention is to provide a light source system, lighting device and projection device to sufficiently reduce the number of color wheels, thereby reducing the volume of the light source system and reducing the cost of the light source system.

In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a light source system, including a color wheel and an optical path combining system. The color wheel is used for receiving at least two beams of incident light at different positions, and correspondingly outputting at least two beams of outgoing light. The light path combining system is used to combine the light paths of the at least two outgoing lights. A first area is arranged on the color wheel, and the first area receives the first incident light and converts the wavelength of the first incident light to generate the first outgoing light.

Wherein, a second area is further provided on the color wheel, and the second area receives the second incident light, and transmits or reflects the second incident light without wavelength conversion, so as to generate the second outgoing light.

Wherein, a third area is further provided on the color wheel, and the third area receives the third incident light and performs wavelength conversion on the third incident light to generate the third outgoing light.

Wherein, a second area is further provided on the color wheel, and the second area receives the second incident light and performs wavelength conversion on the second incident light to generate the second outgoing light.

Wherein, a third area is further provided on the color wheel, and the third area receives the third incident light and performs wavelength conversion on the third incident light to generate the third outgoing light.

Wherein, the first area further receives the second incident light at a receiving position different from that of the first incident light, and performs wavelength conversion on the second incident light to generate second outgoing light with the same color as the first outgoing light. The optical path combining system The first outgoing light and the second outgoing light are respectively filtered to generate third outgoing light and fourth outgoing light of different colors correspondingly, and the optical paths of the third outgoing light and the fourth outgoing light are combined.

Wherein, the first outgoing light and the second outgoing light are yellow light or yellow-green light, the third outgoing light is green light, and the fourth outgoing light is red light.

Wherein, the spot formed by the first incident light and the second incident light on the color wheel acts on the first wavelength conversion region along a concentric circular path, wherein the diameters of the circular paths of the first incident light and the second incident light are the same or different.

Wherein, a second area is further provided on the color wheel, the second area receives the second incident light, and the second area converts the wavelength of the second incident light or transmits or reflects the second incident light without wavelength conversion , to generate the fifth outgoing light, the optical path combining device combines the optical paths of the third outgoing light, the fourth outgoing light and the fifth outgoing light.

Wherein, the optical path combining system includes at least one spectral filter, which transmits at least part of the spectral component of one of the at least two outgoing lights and reflects at least part of the other outgoing light of the at least two incident lights. Some spectral components are used to combine the light paths of the two outgoing beams.

Wherein, the light path combining system includes an optical diaphragm, and a through hole is arranged on the optical diaphragm, and one incident light of the at least two beams of incident light enters the color wheel through the through hole, and the color wheel scatters and reflects the incident light , to generate the outgoing light in the form of scattered light, and the optical film further reflects the outgoing light incident to the outer area of the through hole of the optical film in the form of scattered light.

Wherein, the light source system further includes a reflector, at least one incident light of the two beams of incident light is reflected by the reflector and enters the color wheel, and the color wheel scatters and reflects the incident light to generate output in the form of scattered light. The emitted light in the form of scattered light exits from the outside of the mirror to the light path combining system.

Wherein, the light source system further includes at least two light source devices and a control device, the at least two light source devices respectively generate corresponding one of the at least two beams of incident light, and the control device independently controls the opening and closing and luminous intensity of the at least two light source devices.

Wherein, the optical film is a spectroscopic filter provided with a through hole, and the spectroscopic filter further transmits the supplementary light that does not pass through the color wheel and is incident on the spectroscopic filter, and combines the supplementary light and the incident light into the spectroscopic filter. The outgoing light from the area outside the through hole of the sheet undergoes light path combination.

Wherein, the optical film is a spectroscopic filter, and the emitted light in the form of scattered light is emitted from the outside of the reflector to the spectroscopic filter, and the spectroscopic filter is further transmitted without passing through the color wheel to supplement the incident light of the spectroscopic filter. light, and combine the supplementary light with the outgoing light incident on the spectral filter from the outside of the reflector for optical path combination.

Wherein, the light path combining system further receives the supplementary light incident to the light path combining system without passing through the color wheel, and the light path combining system further combines the supplementary light and the at least two outgoing lights output by the color wheel for optical path combining.

Wherein, the light source system further includes at least three light source devices and a control device, the at least three light source devices respectively generate at least two beams of incident light and a corresponding one of supplementary light, and the control device independently controls the opening and closing of the at least three light source devices and light intensity.

Wherein, the light source system further includes a driving device for driving the color wheel, so that the light spots formed by at least two beams of incident light on the color wheel respectively act on the color wheel along predetermined paths.

Wherein, the driving device is a rotating device, so that the light spots formed by the at least two beams of incident light on the color wheel respectively act on the color wheel along a circular path.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a projection device, which includes any one of the above light source systems.

In order to solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide an illuminating device, which includes any one of the above-mentioned light source systems.

The beneficial effects of the invention are: the invention can fully reduce the number of color wheels, effectively reduce the volume of the light source system, and effectively reduce the cost of the light source system.

Description of drawings

Fig. 1 is a structural schematic diagram of a prior art light source system;

Fig. 2 is a structural schematic diagram of another light source system in the prior art;

3 is a schematic structural diagram of the first embodiment of the light source system of the present invention;

Fig. 4 is a front view of the color wheel of the light source system shown in Fig. 3;

5 is a schematic structural diagram of a second embodiment of the light source system of the present invention;

Fig. 6 is a front view of the color wheel of the light source system shown in Fig. 5;

Fig. 7 is a schematic diagram of the fluorescence spectrum of the color wheel of the light source system shown in Fig. 5 and the filter spectrum of the spectroscopic filter;

Fig. 8 is a schematic structural diagram of the optical path combining system of the third embodiment of the light source system of the present invention;

9 is a schematic structural diagram of a fourth embodiment of the light source system of the present invention;

Fig. 10 is a schematic structural diagram of the fifth embodiment of the light source system of the present invention;

Fig. 11 is a schematic structural diagram of the sixth embodiment of the light source system of the present invention;

Fig. 12 is a schematic structural diagram of the seventh embodiment of the light source system of the present invention.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in FIG. 3 , the first embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 302 , an optical path combining system 303 , a light collecting device 304 and a driving device 305 .

The three light sources correspondingly generate three beams of incident light 301A, 301B and 301C. The color wheel 302 receives the three beams of incident light 301A, 301B and 301C at different positions, and correspondingly outputs three beams of outgoing light (not shown). The optical path combining system 303 performs optical path combining on the three beams of outgoing light, and the light collecting device 304 collects the three beams of outgoing light beams combined by the optical path combining system 303 for subsequent projection display or other applications.

As shown in FIG. 4 , in this embodiment, the color wheel 302 is provided with three concentric ring-shaped regions 402A, 402B and 402C that are nested with each other. The incident lights 301A, 301B and 301C are correspondingly incident on the regions 402A, 402B and 402C, and the specific positions are shown as the light spots 401A, 401B and 401C. The driving device 305 is a rotating device for driving the color wheel 302 to rotate, so that the light spots 401A, 401B, and 401C generated by the incident light 301A, 301B, and 301C on the color wheel 302 respectively act on the area 402A of the color wheel 302 along a circular path. , 402B, and 402C. In other embodiments, the areas 402A, 402B, and 402C may also be strip-shaped areas arranged in parallel or adopt other appropriate arrangement methods. At this time, the driving device 305 is a linear translation device or other appropriate driving device, so that the light spots 401A, 401B and 401C generated by the incident light 301A, 301B and 301C on the color wheel 302 respectively act on the color wheel 302 along a straight line or other predetermined paths. . Since the light spots 401A, 401B and 401C generated by the incident light 301A, 301B and 301C on the color wheel 302 act on the color wheel 302 along a predetermined path, it is avoided that the incident light 301A, 301B and 301C act on the same position of the color wheel 302 for a long time resulting in excessive temperature.

In this embodiment, a red light wavelength conversion material is provided on the region 402A to convert the wavelength of the incident light 301A incident thereon into red light, and a blue light wavelength conversion material is provided on the region 402B to convert the wavelength of the incident light 301A incident thereon to red light. The wavelength of the incident light 301B is converted into blue light, and a green wavelength conversion material is disposed on the region 402C to convert the wavelength of the incident light 301C incident thereon into green light. In this embodiment, the wavelength conversion material includes fluorescent powder, quantum dot material and any other material capable of realizing the wavelength conversion function.

In this embodiment, the optical path combining system 303 includes a total reflection mirror 303A and spectral filters 303B and 303C. The red light output from the area 402A is reflected by the total reflection mirror 303A and then enters the spectral filter 303B, and is transmitted by the spectral filter 303B and then enters the spectral filter 303C, and then is transmitted by the spectral filter 303C and then enters the light collection device 304 . The blue light output from the region 402B is reflected by the spectral filter 303B and then enters the spectral filter 303C, and then is transmitted by the spectral filter 303C and then enters the light collection device 304 . The green light output from the area 402C is reflected by the light splitting filter 303C and then enters the light collection device 304 , thereby realizing the combination of the light paths of the above three beams of output light. In this embodiment, the light collecting device 304 may be any suitable optical element such as a lens or an integrating rod. In other embodiments, the total reflection mirror 303A may also be replaced by a spectral filter capable of reflecting red light. Since the spectral range of the output light generated by the wavelength conversion method is relatively wide, resulting in a relatively low color saturation during display, the above-mentioned spectroscopic filter can be set to transmit or reflect part of the spectral components of the corresponding output light, so that the output light Modified the spectral range to meet the color saturation requirements of the display.

In each embodiment of the present invention, a spectroscopic filter or a spectroscopic filter group is used as the light path combining system. It utilizes the difference in wavelength of light in each optical path to project the light on each optical path to the light collection device through the transmission and reflection of the light on different optical paths through the spectral filter; Whether the light sheet is transmitted or reflected can be arbitrarily designed. For example, in the first embodiment, the positions of the red light wavelength conversion material and the green light wavelength conversion material can be exchanged. At this time, it is only necessary to adjust the reflection and transmission characteristics of each filter accordingly, and the same combination of optical paths can still be achieved. function. Specifically, the total reflection mirror 303A needs to be redesigned to reflect green light, the spectral filter 303B needs to be redesigned to reflect red light and transmit green light at the same time, and the spectral filter 303C needs to be redesigned to reflect red light while transmitting blue light and green light. Light. Therefore, in all embodiments of the present invention, the specific optical structures in which light of different colors on each optical path pass through the optical path combining system are all examples for convenience of description, and do not limit the use of other optical paths that utilize spectroscopic filters. Merged optical structure.

Further, in other embodiments, the number of regions on the color wheel 302 and the wavelength conversion material thereon can be set arbitrarily according to display requirements. For example, by setting the number of regions on the color wheel 302 and the wavelength conversion material thereon, the outgoing light output by the color wheel 302 can be any combination of at least two of green light, red light and blue light. In addition, any one of the aforementioned regions 402A, 402B, and 402C of the color wheel 302 can be set as a light-transmitting region, so as to transmit incident light thereon without wavelength conversion. For example, the region 402B can be replaced with a light-transmitting region. At this time, the incident light 301B is blue light, which is transmitted by the region 402B, and then combined with the red light and green light generated by the regions 402A and 402C through the light path combining system 303 . Region 402B may further be provided with a scattering material or other scattering mechanism to decoherent the incident blue light.

In this embodiment, since the red light, blue light and green light for display are all output by the same color wheel 302, the number of color wheels is sufficiently reduced, the volume of the light source system is effectively reduced, and the light source system is also effectively reduced. system cost. At this time, when it is necessary to generate a colored light sequence, it is only necessary to use the control device to control the three light sources so that the three light sources alternately and rapidly generate incident light 301A, 301B, and 301C to generate a colored light sequence, thereby effectively Avoid the occurrence of color splitting phenomenon.

In this embodiment, the excitation light used to excite the red and green wavelength conversion materials is a semiconductor light source, such as a light emitting diode (Light Emitting Diode, LED) or a laser diode (Laser Diode, LD), and its light emission wavelength can be greater than or equal to The ultraviolet light of 320nm and less than or equal to 420nm may also be the blue light of greater than or equal to 420 and less than or equal to 480nm.

As shown in FIG. 5 , the second embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 502 , an optical path combining system 503 , a light collecting device 504 and a driving device 505 .

As shown in FIG. 6, the difference between the light source system of this embodiment and the light source system shown in FIGS. 3-4 is that an area 602A is provided on the color wheel 502, and the incident lights 501A and 501C are incident on different positions of the area 602A. The specific positions are shown as light spots 601A and 601C. The region 602A converts the wavelengths of the incident light 501A and 501C incident on it into two beams of outgoing light of the same color, and then is filtered by the optical path combining system 503 into another two beams of outgoing light of different colors, and the optical path is combined. Specifically, in this embodiment, a yellow-green light wavelength conversion material is disposed on the region 602A, so as to convert the incident light 501A and 501C into yellow-green light, respectively. Wherein, the yellow-green light converted from the incident light 501A enters the total reflection mirror 503A, is reflected by the total reflection mirror 503A and then enters the spectral filter 503B, and the yellow-green light converted from the incident light 501C enters the spectral filter 503C. In this embodiment, the light spots 601A and 601C can act on the area 602A along concentric circular paths. Wherein, the diameters of the respective circular paths of the light spots 601A and 601C may be the same or different, and the latter has a higher fluorescence conversion efficiency than the former, because: when two light spots act on the circular paths of the same diameter, The heat generated by the excitation of the wavelength conversion material by the two excitation spots is distributed on this circular path, and the heat and temperature will be accumulated; when the two spots act on two concentric circular paths with different diameters, the two The heat generated by the excitation of the wavelength conversion material by the excitation light spot is distributed on the two circular paths, and the temperature on the fluorescence conversion material is lower than that when the two light spots act on the circular path with the same diameter.

As shown in FIG. 7 , the curve 701 is the spectrum curve of yellow-green light, the curve 702 is the filtering curve of the spectral filter 503B, and the curve 703 is the filtering curve of the spectral filter 503C. It can be seen from FIG. 7 that the green light component of the yellow-green light converted by the incident light 501A (corresponding to the spectral range of approximately greater than or equal to 500nm and less than or equal to 570nm) is reflected by the spectral filter 503B as stray light and cannot be collected by the collecting device 504 , and the red light component (corresponding to the spectral range of approximately greater than or equal to 580nm and less than or equal to 680nm) is transmitted to the spectral filter 503C by the spectral filter 503B, and is transmitted through the spectral filter 503C, and then the red light is output to the light Collection device 504 . The red light component of the yellow-green light converted by the incident light 501C is transmitted by the spectral filter 503C as stray light and cannot be collected by the collecting device 504, while the green light component is reflected by the spectral filter 503C, and then outputs green light to the light collecting device 504. In other embodiments, the incident light 501A and 501C may also undergo wavelength conversion in the region 602A to generate yellow light, which is filtered into red light and green light by the spectral filter 503B and the spectral filter 503C, respectively.

It can be seen from the description of FIG. 7 that, in addition to the function of merging light on different optical paths, the spectral filters 503A and 503C can also partially transmit or reflect the light incident on them, and convert the original light emitted by the wavelength conversion material. The spectrum is filtered to make its color more suitable for actual use requirements. For example, in this embodiment, the color coordinates of the original spectrum 701 of the yellow-green wavelength conversion material are (0.414, 0.548), and the color coordinates of the green light obtained respectively through the filtering action of the above-mentioned spectroscopic filters 503A and 503C are (0.323 , 0.624), the color coordinates of red light are (0.65, 0.35). In the color standard of Rec 709, the standard color coordinates of green light are (0.3, 0.6), and the standard color coordinates of red light are (0.0.64, 0.33). Obviously the color of the filtered light is closer to the annotation color. It is worth noting that, in a general sense, "filtering" of light refers to allowing part of the effective spectral energy to pass through, while the rest of the spectral energy is reflected or absorbed as ineffective light, but in the present invention, a certain kind of original light is transmitted When the spectroscopic filter in the optical path combining system is "filtered", it means that part of the effective spectral energy of the original light is guided to the collection device by using the spectroscopic filter, and the remaining invalid spectral energy cannot be collected by the collection device; Whether the effective spectral energy is reflected or transmitted on the spectroscopic filter is determined by the optical structure of the specific optical path combining system.

In addition, the same as the embodiment shown in FIGS. 3-4 , the color wheel 502 is further provided with a region 602B, and the incident light 501B is incident on the region 602B, and the specific position is shown as the light spot 601B. The region 602B performs wavelength conversion on the incident light 501B or transmits the incident light 501B without wavelength conversion to output blue light. The blue light output from the area 602B is reflected by the spectral filter 503B, then transmitted by the spectral filter 503C, and combined with the above-mentioned red light and green light. In other embodiments, the above-mentioned red light, green light and blue light may be other output light combinations of different colors.

As shown in FIG. 8 , the light path combining system of the third embodiment of the light source system of the present invention includes total reflection mirrors 803A, 803B and spectroscopic filters 803C, 803D. The difference between the optical path combining system of this embodiment and the optical path combining system in the above-mentioned embodiments is that, through the proper setting of the above-mentioned components, the optical paths of this embodiment are not limited to be arranged in the same plane, thereby enhancing the optical path Design flexibility.

As shown in FIG. 9 , the fourth embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 902 , an optical path combining system 903 , a light collecting device 904 and a driving device 905 . The difference between the light source system of this embodiment and the light source system shown in FIGS. The light path combining system 903 is transmitted through the light-splitting filters 903A and 903B, and then the outgoing light (for example, Red light and green light) combined light paths. In this embodiment, the supplementary light 901C directly enters the light path combining system 903 without being affected by the color wheel 902 , which can simplify the design of the color wheel 902 and reduce the volume of the color wheel 902 , which is beneficial to miniaturization. The incident mode of supplementary light 901C in this embodiment is also applicable to the light source system shown in FIGS. 3-4 .

As shown in FIG. 10 , the fifth embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 1002 , an optical path combining system 1003 , a light collecting device 1004 and a driving device 1005 . The difference between the light source system of this embodiment and the light source system shown in FIG. 9 is that the incident light 1001A and 1001C are respectively transmitted through the spectroscopic filters 1003A and 1003B and then incident on the color wheel 1002. The outgoing light generated by the wavelength conversion of 1001C is reflected by the color wheel 1002 and re-enters the spectral filters 1003A and 1003B, and is combined with the complementary light 1001B through the spectral filters 1003A and 1003B.

In this embodiment, the color wheel 1002 outputs outgoing light in a reflective manner, so that the light source system can meet different optical path design requirements, thereby improving the flexibility of the light source system.

It should be noted that the structure of the color wheel 902 shown in FIG. 9 is different from that of the color wheel 1002 shown in FIG. 10 . In the embodiment shown in Figure 9, the exit surface of the excited light and the incident surface of the excitation light are respectively located on both sides of the wavelength conversion material, while in the embodiment shown in Figure 10, the exit surface of the excited light and the excitation surface are respectively located on both sides of the wavelength conversion material. The incident surface of the light is on the same side as the wavelength converting material, the former being called a transmissive color wheel and the latter being called a reflective color wheel. A transmissive color wheel has a transparent or translucent base material, allowing excitation light to pass through and enter the light wavelength conversion material, while at least part of the stimulated light can pass through and exit. The reflective color wheel is equipped with a reflective layer on the other side of the excited surface of the wavelength conversion material, such as a mirror or an aluminum plate coated with a highly reflective silver film, so that all the excited light emitted by the wavelength conversion material is emitted from the excited side.

Although transmissive and reflective color wheels have different optical structures, a comparison of the embodiments of Figures 9 and 10 shows that both can be used in the present invention. Further, the two can also be used in combination, that is, among at least two beams of incident light incident on the same color wheel, one beam is transmissive and the other beam is reflective; correspondingly, there are also Transmissive transparent/translucent substrate and reflective reflective layer. Through the description of the foregoing embodiments, those skilled in the art can realize the combined use of the transmission type and the reflection type, so the present invention does not enumerate the embodiments for details.

The problem with the fifth embodiment of the present invention as shown in FIG. 10 is that when it is desired to scatter and reflect the incident blue light through the light-scattering material arranged on the color wheel 1002 to obtain scattered light, because the light-scattering process does not make The wavelength emission of light changes, and the spectral filters 1003A and 1003C separate the incident light and outgoing light through the transmission and reflection of different wavelengths, so the scattered light will not be reflected by 1003A and 1003C, but directly transmitted and cannot be collected by the collection system. The sixth and seventh embodiments of the present invention solve this problem.

As shown in FIG. 11 , the sixth embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 1102 , an optical path combining system 1103 and a driving device 1105 . The difference between the light source system of this embodiment and the light source system shown in FIG. 10 is that the incident light 1101A enters the color wheel 1102 through the through hole on the spectral filter 1103A, and is diffused by the scattering material arranged on the color wheel 1102. Scattering and reflection are performed with wavelength conversion to produce outgoing light in the form of scattered light. Utilizing the expansion of the etendue of the light beam after scattering, the spectral filter 1103A reflects the outgoing light incident to the outer area of the through hole of the spectral filter 1103A in the form of scattered light to the spectral filter 1103B, realizing the incident light Separation of outgoing light from mostly scattered light. The outgoing light is transmitted through the spectral filter 1103B. The incident light 1101C is transmitted through the spectral filter 1103B and then enters the color wheel 1102 , and the wavelength conversion is performed by the color wheel 1102 to generate another outgoing light. The other outgoing light is reflected by the color wheel 1102 and further reflected by the spectral filter 1103B. The supplementary light 1101B is transmitted through the spectral filters 1103A and 1103B, so as to merge with the above two beams of outgoing light. In this embodiment, the incident light 1101A can be effectively guided to the color wheel 1102 through the through hole provided on the dichroic filter 1103A, and is fully reflected by the color wheel through the outer area of the through hole of the dichroic filter 1103A. 1102 reflected scattered light. In a preferred embodiment, the through hole area of the spectral filter 1103A is less than 1/4 of the reflective area of the spectral filter 1103A. In other embodiments, the spectral filter 1103A provided with through holes is also applicable to the incident light and the outgoing light that need to be converted by the color wheel 1102 in wavelength. Further, in the case that the supplementary light 1101B does not need to be transmitted, the spectral filter 1103A can also be replaced by a reflective mirror with a through hole or other suitable optical films.

As shown in FIG. 12 , the seventh embodiment of the light source system of the present invention includes three light sources (not shown), a color wheel 1202 , an optical path combining system 1203 and a driving device 1205 . Similar to the sixth embodiment, the expansion of the etendue of the scattered light beam is also used in this embodiment to separate the incident light and the outgoing light in the form of most of the scattered light. The difference between the light source system of this embodiment and the light source system shown in FIG. 10 is that the incident light 1201A is reflected by the reflector 1203A and then enters the color wheel 1202, and the astigmatism material arranged on the color wheel 1202 does not perform wavelength conversion. Scattering and reflection are carried out in order to produce the outgoing light in the form of scattered light. The outgoing light in the form of scattered light exits from the outside of the mirror 1203A, is reflected by the spectral filter 1203B, and is transmitted by the spectral filter 1203C. The incident light 1201C is transmitted through the spectral filter 1203C and then enters the color wheel 1202, and the wavelength conversion is performed by the color wheel 1202 to generate another outgoing light. The other outgoing light is reflected by the color wheel 1202 and further reflected by the spectral filter 1203C. The supplementary light 1201B is transmitted through the spectral filters 1203B and 1203C, so as to merge with the above two beams of outgoing light. In a preferred embodiment, the projected area of the mirror 1203A on the color wheel 1202 is less than 1/4 of the projected area of the dichroic filter 1203B on the color wheel 1202 . In other embodiments, the combination of the reflecting mirror 1203A and the dichroic filter 1203B is also applicable to the incident light and the outgoing light that need to be converted by the color wheel 1102 in wavelength. Moreover, in the case that the supplementary light 1201B does not need to be transmitted, the spectral filter 1203B can also be replaced by a reflective mirror or other suitable optical films.

It is worth noting that when the incident light is incident on the color wheel, whether it is scattered or stimulated by the wavelength conversion material to generate stimulated light, the emitted light beam is divergent. In practical applications, it is necessary to use collimating lenses or lens groups to collimate Then merge with other light paths. Because this is a commonly used technical means in this field, in the schematic diagrams and descriptions of all the embodiments of the present invention, no collimating lens or lens group is described and the collimated excited light or scattered light is directly used, which does not limit the related Use of optical components.

In the present invention, the switch and luminous intensity of each light path can be controlled independently. If LED or LD is used as the light source, the outgoing light of the light source system of the present invention can become a sequence of monochromatic light due to the characteristic of high-speed modulation of the semiconductor light source. The monochromatic light sequence can be synchronized with a light valve (such as a DMD chip of TI company) to realize projection display.

Specifically, if one wishes to obtain a time sequence of monochromatic light of red-green-blue-red-green-blue-…, during the time period of monochromatic red light, turn on the light source corresponding to the red light (excite the color wheel The excitation light source of the red wavelength conversion material on the top, or the red light monochrome supplementary light source), and turn off other light sources; when the red light segment ends and the green light segment begins, turn off the corresponding light source and turn on the green light corresponding light source, in turn analogy.

In practical applications, in order to increase the brightness of the projection, it is necessary to introduce white light into the monochromatic light sequence, such as the light emitting sequence of red-green-blue-white-red-green-blue-white.... In this case, for the time period of monochromatic light such as red, green and blue, the corresponding light source is still turned on while other monochromatic light sources are turned off, and when the time period of white light starts, the three colors of red, green and blue are turned on at the same time For the corresponding light source, the three colors are combined by the light path combination system to obtain white light output light. When the time period of white light ends and the time period of red light begins, the light sources corresponding to green light and blue light are turned off, and the light sources corresponding to red light are kept. on, and so on. Similarly, green light and red light can be turned on at the same time to realize yellow light, blue light and green light can be turned on at the same time to realize cyan light, blue light and red light can be turned on at the same time to form purple-red light, and red, green and blue lights can be turned on at the same time for half of the full load Get half-brightness white light, etc. There are different control modes for different applications.

Therefore, the present invention also provides a projection device using any one of the above light source systems. In addition to obtaining light sequences with different time sequences, the present invention can also realize the continuous change of the color of the final outgoing light within a specific color gamut in the CIE1931 color gamut diagram through independent control of each light source. The color coordinates of each vertex of the color gamut are the color coordinates of the monochromatic light in each light path in CIE1931. By controlling the brightness of the light in each light path, the color coordinates of the combined mixed light can be changed; specifically, increasing the brightness of the monochromatic light in a certain light path will make the color coordinates of the mixed light move towards the monochromatic light. The direction of the color coordinates of the mixed light drifts, and reducing the brightness of the monochromatic light will cause the color coordinates of the mixed light to drift in the opposite direction of the color coordinates of the monochromatic light.

Therefore, the present invention also provides a lighting device. The lighting device includes at least two light sources, and the light emitted by these two light sources is incident on any one of the light source systems mentioned above, and the mixed light after combining the light paths is obtained as outgoing light. The outgoing light can be directly used as an illumination source, or can be combined with the projection optical system or collimation optical system at the rear end to obtain a specific shape of the illumination area, and can also be used in conjunction with the use of the pattern wheel to obtain a specific pattern on the pattern wheel in the target illumination area. Cooperating with the independent control of the light source, the lighting device can also obtain outgoing light of different colors, and the color of the outgoing light can be continuously changed within a certain color gamut.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (10)

1. a kind of light-source system is it is characterised in that described light-source system includes:

At least two excitation sources, each described excitation source produces a branch of incident illumination respectively；

Colour wheel, including at least two circumferentially arranged circular light-emitting zones, receives for the diverse location in described colour wheel A branch of incident illumination that described at least two excitation sources produce respectively, and it is correspondingly outputting to few two bundle emergent lights along different light paths；

Light path combination system, for carrying out light path by described colour wheel along at least two bundle emergent lights described in the corresponding output of different light paths Merge；

Control device, for independently control each excitation source in described at least two excitation sources switch and/or Luminous intensity.

2. light-source system according to claim 1 is it is characterised in that each incidence of described at least two excitation source outgoing Light is incident in the different light-emitting zones of described colour wheel, or each incident illumination of described at least two excitation source outgoing respectively The diverse location of at least two incident light beam strikes extremely identical light-emitting zone of described colour wheel.

3. light-source system according to claim 2 is it is characterised in that different light-emitting zones is defeated under the irradiation of incident illumination Go out the emergent light with different spectral range.

4. light-source system according to claim 3 sends incidence it is characterised in that described control device independently controls The excitation source timesharing of the extremely incident illumination of the different light-emitting zones of described colour wheel or diverse location is opened, so that described light source system System output monochromatic light sequence.

5. light-source system according to claim 4 is it is characterised in that described at least two light-emitting zones include red light-emitting Region, green luminescence region and blue light emitting region, described control device control sends the incidence being incident to red light-emitting region First excitation source of light, send the second excitation source of the incident illumination being incident to green luminescence region and send and be incident to indigo plant The periodic timesharing of 3rd excitation source of the incident illumination of light light-emitting zone is opened, so that described light-source system output timing Red, green, blue.

6. light-source system according to claim 4 it is characterised in that described control device each cycle the first period Control the first excitation source sending the incident illumination being incident to red light-emitting region to open, control in second period in each cycle The second excitation source sending the incident illumination being incident to green luminescence region is opened, and controls in the 3rd period in each cycle and sends The 3rd excitation source being incident to the incident illumination in blue light emitting region is opened, and controls described first in the 4th period in each cycle Excitation source, the second excitation source and described 3rd excitation source are all opened so that described light-source system output timing red, Green, blue, white light.

7. light-source system according to claim 3 is it is characterised in that described control device controls to send is incident to HONGGUANG and sends out First excitation source of the incident illumination in light region, send the incident illumination being incident to green luminescence region the second excitation source and At least two excitation sources sending in the 3rd excitation source of the incident illumination being incident to blue light emitting region are opened simultaneously, so that Described light-source system exports the mixed light of at least two light in red, green, blue.

8. light-source system according to claim 7 is it is characterised in that in described first excitation source, the second excitation source And the 3rd at least two excitation source in excitation source when simultaneously opening, described control device controls simultaneously open each to swash The luminosity of luminous source, to control the chromaticity coordinates of described mixed light.

9. light-source system according to claim 1 is it is characterised in that described light-source system also includes:

Supplement light source, supplement light for outgoing；

Described light path combination system by described colour wheel export described at least two bundle emergent lights and described supplementary light source outgoing Supplement light and carry out light path merging；

Described control device independently controls described at least two excitation sources, the opening the light and/or luminous of described supplementary light source Intensity.

10. a kind of projection arrangement is it is characterised in that described projection arrangement includes the light described in described any one of claim 1 to 9 Origin system.