CN102650812B - Light source component, light source system and projection device - Google Patents

Abstract

The invention relates to a light source component, a light source system and a projection device. The light source assembly includes an excitation light source for generating excitation light; a color wheel, on which a first wavelength conversion material is arranged, and the first wavelength conversion material converts the excitation light into light of a first color; An optical filter, the optical filter is provided with a first filter area, and the first filter area filters the first color light to generate a second color light, wherein the first color light and the The difference between the dominant wavelengths of the light of the second color is greater than or equal to 3nm. Through the above method, the present invention can convert the excitation light into the first wavelength conversion material of the first color light and cooperate with the filter to generate the second color light, so as to avoid the use of relatively high price or poor performance directly absorbing excitation light The wavelength conversion material for generating light of the second color reduces the cost of the light source system and improves the light conversion efficiency of the light source system.

Description

Light source component, light source system and projection device

technical field

The invention relates to the technical field of light sources for illumination and display, in particular to a light source component, a light source system and a projection device.

Background technique

At present, many applications require the use of high-brightness color light sources, such as stage lights, projection displays, and RGB backlights. Among them, a gas discharge lamp (for example, an ultra-high pressure mercury lamp) is a traditional high-brightness light source used in special lighting and display fields. However, because mercury is easy to cause environmental pollution, the industry is looking for an environmentally friendly light source to replace the ultra-high pressure mercury lamp.

Please refer to FIG. 1 , which is a schematic structural diagram of a light source system in the prior art. As shown in FIG. 1 , the light source system includes a solid-state light source 101 , a lens 103 , a color wheel 104 and a driving device 106 . The solid state light source 101 is used to generate an excitation light 102 . The lens 103 is used to condense the excitation light 102 onto the color wheel 104 . Different segments of the color wheel 104 are provided with different phosphors. Therefore, during the process of the color wheel 104 rotating around the rotation axis 107 driven by the driving device 106 , the excitation light 102 excites these phosphors sequentially, thereby generating a color light sequence 105 . For example, phosphors may include red phosphors, green phosphors, and yellow phosphors. When the red phosphor area of the color wheel 104 rotates onto the propagation path of the excitation light 102 , the red phosphor is excited by the excitation light 102 to generate red light with high brightness. The production process of green and yellow light is the same as that of red light.

However, in the existing phosphors, the price of some phosphors is much higher than other phosphors or the working performance is much lower than other phosphors. For example, the price of red phosphors is much higher than other phosphors at present, thus leading to cost increase. In addition, compared with other phosphors, the red phosphor has a larger Stokes shift loss (Stokes shift loss), which will easily lead to an increase in the temperature of the red phosphor, thereby reducing the photoconversion efficiency of the excitation light and the system performance. reliability.

To sum up, it is necessary to provide a light source assembly, a light source system and a projection device, so as to solve the above-mentioned technical problems common to the light source systems in the prior art.

Contents of the invention

The technical problem mainly solved by the present invention is to provide a light source assembly, a light source system and a projection device, so as to reduce the cost of the light source system or improve the light conversion efficiency 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 assembly, including an excitation light source, a color wheel and a filter. The excitation light source is used to generate excitation light, and a first wavelength conversion material is arranged on the color wheel, and the first wavelength conversion material converts the excitation light into first color light. The filter is provided with a first filter area, and the first filter area filters the first color light to generate the second color light, wherein the difference between the dominant wavelengths of the first color light and the second color light is greater than or equal to 3nm.

Wherein, the dominant wavelength of the first color light is 520nm and less than 590nm, and the dominant wavelength of the second color light is greater than 590nm.

Wherein, the first color light is green light or yellow light, and the second color light is red light.

Wherein, the dominant wavelength of the first color light is greater than 570nm and smaller than 590nm, and the dominant wavelength of the second color light is smaller than 570nm.

Wherein, the first color light is yellow light, and the second color light is green light or cyan light.

Wherein, the light conversion efficiency of the first wavelength conversion material is greater than 15%.

Wherein, the difference between the dominant wavelengths of the first color light and the second color light is greater than or equal to 10 nm.

Wherein, the light source assembly further includes a driving device, and the driving device drives the color wheel, so that the light spot generated by the excitation light on the color wheel acts on the first wavelength conversion material along a predetermined path.

Wherein, the color wheel and the filter are relatively fixed, and are driven by the driving device to move synchronously.

Wherein, the color wheel and the filter are two annular structures coaxially fixed on the rotating shaft of the driving device.

Wherein, the light source assembly includes a driving device, the color wheel includes at least two sections, the first wavelength conversion material is arranged in the first section of the at least two sections, and the second section of the at least two sections The second wavelength conversion material is arranged on it or configured to transmit or filter the excitation light, and the driving device drives the color wheel, so that the excitation light acts on the first section and the second section sequentially.

Wherein, the color wheel and the optical filter are relatively fixed and move synchronously under the drive of the driving device. The optical filter is further provided with a second filter area or a light transmission area, and the excitation light is converted by the first wavelength on the first section. The first color light generated by material conversion is filtered by the first filter area, and the excitation light is converted by the second wavelength conversion material on the second section to generate third color light or the excitation light transmitted or filtered by the second section Filter or transmit through the second filter area or the light transmission area.

Wherein, the color wheel is configured to transmit or reflect light of the first color.

Wherein, the color wheel is configured to reflect the first color light, and the light source assembly further includes an arc-shaped reflector with a reflective surface inside, and the arc-shaped reflector reflects the first color light reflected by the color wheel to the filter.

Wherein, the excitation light enters the color wheel through the top opening of the arc-shaped reflector.

Wherein, the color wheel is set to reflect the light of the first color, the filter is a dichroic mirror arranged between the color wheel and the excitation light source, the dichroic mirror transmits the excitation light, reflects the light of the second color and transmits the light of the first color at the same time. The remaining spectral component of the color light, or the dichroic mirror reflects the excitation light while transmitting the second color light and reflecting the remaining spectral component of the first color light.

Wherein, the light source assembly further includes a light collection device arranged between the color wheel and the filter, and the light collection device reduces the divergence angle of the first color light incident on the filter.

Wherein, the light collecting device is a lens or a wedge-shaped light guide.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to provide a light source system, including the above-mentioned first light source assembly.

Wherein, the light source system further includes a second light source assembly and an optical path combining device, the optical path combining device combines the light of the second color generated by the first light source assembly with the light generated by the second light source assembly.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to provide a projection device, including the above-mentioned light source assembly.

The beneficial effect of the present invention is: different from the situation of the prior art, through the above method, the light source assembly, the light source system and the projection device of the present invention utilize the first wavelength conversion material and the light filter that can convert the excitation light into the first color light Chips cooperate to generate the second color light, so as to avoid the use of relatively high-priced or poor-performance wavelength conversion materials that directly absorb the excitation light to generate the second color light, which reduces the cost of the light source system and improves the light conversion efficiency of the light source system .

Description of drawings

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

2 is a schematic structural view of the first embodiment of the light source assembly of the present invention;

Fig. 3 is a front view of the color wheel of the light source assembly shown in Fig. 2;

Fig. 4 is a chromaticity diagram for explaining the main wavelength change before and after light filtering of the light source assembly shown in Fig. 2;

Fig. 5 is a schematic diagram of the spectrum used to illustrate the technical effect of the light source assembly shown in Fig. 2;

6 is a schematic structural view of the second embodiment of the light source assembly of the present invention;

7 is a schematic structural diagram of a third embodiment of the light source assembly of the present invention;

Fig. 8 is a schematic structural view of the fourth embodiment of the light source assembly of the present invention;

Fig. 9 is a front view of the color wheel and the filter of the light source assembly shown in Fig. 8;

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

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

Detailed ways

Please refer to Figs. 2-3, Fig. 2 is a schematic structural diagram of the first embodiment of the light source assembly of the present invention, and Fig. 3 is a front view of the color wheel of the light source assembly shown in Fig. 2 . As shown in FIG. 2 , the light source assembly of this embodiment mainly includes an excitation light source 201 , a color wheel 203 , a driving device 204 , a light collecting device 206 and a filter 207 .

The excitation light source 201 generates an excitation light 202 that is incident on a color wheel 203 . The color wheel 203 is provided with a first wavelength conversion material 2031 for converting the excitation light 202 into a first color light 205 and transmitting it through the color wheel 203 . The first color light 205 transmitted by the color wheel 203 is relayed to the filter 207 through the light collecting device 206 . The filter 207 is provided with a first filter area (not shown), and the first filter area filters the first color light 205 to generate the second color light 208 . In this embodiment, the first color is different from the second color.

As shown in FIG. 3 , in this embodiment, the first wavelength conversion material 2031 is arranged in an annular shape on the color wheel 203, and the driving device 204 is a rotating device with a rotating shaft, thereby driving the color wheel 203 to rotate around its rotating shaft, The light spot 2011 generated by the excitation light 202 on the color wheel 203 acts on the first wavelength conversion material 2031 along a circular path, thereby avoiding the temperature caused by the excitation light 202 acting on the same position of the first wavelength conversion material 2031 for a long time raised. In other embodiments, the color wheel 203 can also be designed as a belt or a cylinder, and the driving device 204 can also use a linear translation device or other appropriate driving devices, so that the light spot generated by the excitation light 202 on the color wheel 203 moves along the The predetermined path acts on the first wavelength converting material.

In addition, in other embodiments, at least two sections (not shown) may be set on the color wheel 203, the first wavelength conversion material 2031 is set in the first section of the at least two sections, and the at least two A second of the segments is provided with a second wavelength converting material (not shown) or configured to transmit or filter the excitation light. At this time, the driving device 204 drives the color wheel 203, so that the excitation light acts on the first segment and the second segment in sequence, so that the first segment outputs light of the first color through wavelength conversion, and the second segment outputs light of the first color through wavelength conversion. Output third color light or output excitation light through transmission. The light of the first color is filtered into the light of the second color by the filter 207, and the light of the third color or excitation light is transmitted or reflected by the filter 207, and then used together with the light of the second color for subsequent display.

In this embodiment, the excitation light source 201 is preferably a blue light, ultraviolet light or near ultraviolet light source, so as to generate blue light, ultraviolet light or near ultraviolet light as the excitation light 202 . The first wavelength conversion material is preferably yellow phosphor, such as cerium-doped yttrium aluminum garnet phosphor (YAG:Ce), so as to convert the excitation light 202 into yellow light as the first color light 205 . The dominant wavelength of the first color light 205 is 570nm and less than 590nm. The filter 207 filters the incident first color light 205 and outputs red light as the second color light 208 . The dominant wavelength of the second color light 208 is greater than 590 nm.

In this embodiment, the filter 207 may be an absorption filter or a dichroic filter. Because the filter spectral line of the dichroic filter drifts with the change of the incident angle of the incident light. Therefore, in this embodiment, a light collection device 206 is provided between the color wheel 203 and the filter 207 to reduce the divergence angle of the first color light 205 incident on the filter 207 . In this embodiment, the light collecting device 206 is a lens. In other embodiments, the light collection device 206 may also be a wedge-shaped light guide or other similar optical elements. Certainly, when the optical filter 207 adopts an absorption type optical filter or the divergence angle of the first color light 205 does not affect the filtering effect of the optical filter 207, the light collecting device 206 can also be omitted.

As shown in FIG. 4 , FIG. 4 is a 1931 chromaticity diagram of the International Commission on Illumination (CIE, International Commission on Illumination). The curve 124 in the figure is called a spectral locus, and the points on the spectral locus 124 represent the color coordinates of monochromatic light of a certain wavelength, and the wavelength of the monochromatic light corresponding to the points marked on the spectral locus 124 is in nm. Point 121 is the color coordinate corresponding to a standard white color, such as point (1/3, 1/3). For a spectrum with a certain width, such as a certain yellow light spectrum, its color coordinates are at position 122 in the figure, and the dominant wavelength of this spectrum is defined as the intersection point 132 of the extension line connecting the standard white point 121 and its color coordinates 122 with the spectral locus corresponding to the wavelength of monochromatic light. When the spectrum of this color is changed, such as passing through a filter, its color coordinates change, such as moving to point 123, the line connecting standard white point 121 and point 123 intersects with spectral locus 124 at point 133, changing like this The dominant wavelength corresponding to the last color is then changed to the wavelength of the monochromatic light corresponding to the point 133 .

Please refer to FIG. 5 . FIG. 5 is a schematic spectrum diagram for illustrating the technical effect of the light source assembly shown in FIG. 2 . Fig. 5 shows the fluorescence spectra of typical red phosphors, green phosphors and yellow phosphors. As shown in FIG. 5 , the peak spectral radiance of the red phosphor is significantly lower than that of the other two phosphors, and the radiant power of the red phosphor is much smaller than that of the other two phosphors. Further, the spectrum of the red phosphor powder roughly intersects with the spectrum of the yellow phosphor powder at 629nm, and at the same time intersects the spectrum of the green phosphor powder at 609nm.

If the ideal filter is used to filter out the spectral components with wavelengths less than 590nm and only pass through the spectral components with wavelengths greater than 590nm, the radiant power of the remaining spectral components of the three phosphors is shown in Table 1:

Table 1

As shown in Table 1, the radiant power of the remaining spectral components of the green phosphor is much smaller than that of the red phosphor and the yellow phosphor. However, the radiant power of the remaining spectral components of the red phosphor is smaller than that of the yellow phosphor. In addition, as shown in FIG. 5 , the radiant power of the red phosphor in the wavelength band greater than 629 nm is greater than that of the yellow phosphor. And because the spectral luminous efficiency (spectralluminous efficiency) in the band greater than 629nm is lower than 590nm and less than the band of 629nm, the visual effect of the remaining spectral components of the red phosphor is obviously darker than that of the yellow phosphor. The luminous flux of the red light generated by the phosphor combined with the filter is higher than the red light generated by using the red phosphor alone. It has been proved by tests that the color coordinates of the red light produced by using the yellow phosphor combined with the filter and the red light produced by the red phosphor are both at (x=0.64, y=0.35), and the luminous flux difference between the two is 30%- 40%.

Further, the light conversion efficiency of yellow phosphor is generally about 47%, while that of red phosphor is only 12.4%. Therefore, under the same excitation conditions, the heat generated by yellow phosphor is much lower than that of red phosphor. Phosphor, thereby improving the light conversion efficiency of the light source system. In the present invention, the light conversion efficiency of the first wavelength conversion material is preferably greater than 15%.

In addition, since the price of the yellow phosphor is much lower than that of the red phosphor, the cost of the light source system can also be reduced by using the yellow phosphor with a filter instead of the red phosphor.

In other embodiments, yellow phosphors can be used in conjunction with filters to generate light of other colors, or other wavelength conversion materials can be used in conjunction with filters to generate red light or light of other colors. For example, green light or blue light is generated by filtering yellow light generated by yellow phosphor through a filter. At this time, the dominant wavelength of the first color light is greater than 570nm and less than 590nm, and the dominant wavelength of the second color light is less than 570nm. In addition, the first wavelength conversion material can use green phosphor powder, which converts the excitation light into green light, and outputs red light after being filtered by a filter. At this time, the dominant wavelength of the first color light is 520nm and less than 570nm, and the dominant wavelength of the second color light is greater than 590nm.

Different from the prior art scheme that uses filters to modify the colored light, in the prior art, the color of the colored light before and after filtering by the filter does not change, that is, the change of its dominant wavelength is generally less than 3nm, while In the present invention, the color of the colored light before and after filtering by the filter changes, that is, the dominant wavelength changes significantly, wherein the difference between the dominant wavelengths of the first color light and the second color light is greater than or equal to 3nm, and can be further greater than or equal to 10nm .

Please refer to FIG. 6 , which is a schematic structural diagram of a second embodiment of the light source assembly of the present invention. As shown in FIG. 6 , the light source assembly of this embodiment mainly includes an excitation light source 501 , a color wheel 503 , a driving device 504 , a reflecting device 505 , a light collecting device 507 and a filter 508 . The difference between the light source system of this embodiment and the first embodiment shown in FIG. 2 is that the color wheel 503 in this embodiment is set to reflect the first color light 506 . For example, the above reflection function can be realized by plating a reflection layer under the first wavelength conversion material. In this embodiment, the excitation light 502 generated by the excitation light source 501 is incident on the color wheel 503 driven by the driving device 504 through the top opening of the reflection device 505 . The first wavelength conversion material disposed on the color wheel 503 converts the incident excitation light 502 into the first color light 506 , which is reflected by the color wheel 503 . The first color light 506 reflected by the color wheel 503 enters the reflector 505 , is reflected by the reflector 505 to the light collection device 507 , and then enters the filter 508 after being relayed by the light collection device 507 . The filter 508 filters the first color light 506 and inputs the second color light 509 .

In this embodiment, the light collecting device 507 is a wedge-shaped light guide, and the reflecting device 505 is an arc-shaped reflecting device with a reflecting surface inside, such as a semi-ellipsoid or hemispherical reflecting device. Wherein, when the reflective device 505 is in the shape of a semi-ellipsoid, the reflective device 505 can reflect light from near one focal point of the reflective device 505 to near another focal point of the reflective device 505 . When the reflector 505 is in the shape of a hemisphere, two symmetrical points symmetrical to the center of the sphere are provided near the center of the sphere, and the reflective device 505 can roughly reflect the light from one of the symmetrical points to the other symmetrical point.

Please refer to FIG. 7, which is a schematic structural diagram of a third embodiment of the light source assembly of the present invention. As shown in FIG. 7 , the light source assembly of this embodiment mainly includes an excitation light source 601 , a dichroic mirror 603 , a light collecting device 604 , a color wheel 605 and a driving device 606 . The difference between the light source assembly of this embodiment and the first embodiment shown in FIG. 2 is that the color wheel 605 is set to reflect the first color light 607, and the two Chromatic mirror 603 acts as a filter. At this time, the excitation light 602 generated by the excitation light source 601 is transmitted through the dichroic mirror 603 , and then relayed to the color wheel 605 driven by the driving device 606 through the light collection device 604 . The first wavelength conversion material disposed on the color wheel 605 converts the incident excitation light 602 into a first color light 607 , which is reflected by the color wheel 605 . The first color light 607 is relayed to the dichroic mirror 603 via the light collecting device 604 . The dichroic mirror 603 reflects the second color light 608 and transmits the remaining spectral components of the first color light 607 . In other embodiments, the dichroic mirror 603 can also be configured to reflect the excitation light 602 to the color wheel 605 while transmitting the second color light 608 and reflecting the remaining spectral components of the first color light 607 . Further, in other embodiments, the dichroic mirror 603 can also be configured to transmit the excitation light 602 to the color wheel 605, and reflect the first color light 607 to a filter (not shown), and the filter pairs the first The color light 607 is filtered to generate the second color light 608, or the dichroic mirror 603 can also be configured to reflect the excitation light 602 to the color wheel 605, and transmit the first color light 607 to a filter (not shown), by The filter filters the first color light 607 to generate the second color light 608 .

Please refer to FIGS. 8-9 . FIG. 8 is a schematic structural diagram of a fourth embodiment of a light source assembly of the present invention, and FIG. 9 is a front view of the color wheel and filter shown in FIG. 8 . As shown in FIG. 8 , the light source assembly of this embodiment mainly includes an excitation light source 701 , a reflection device 703 , a color wheel 704 , a driving device 705 , a light collection device 707 and a filter 708 .

The difference between the light source assembly of this embodiment and the second embodiment shown in FIG. 6 is that in this embodiment, the color wheel 704 and the filter 708 are relatively fixed and move synchronously under the drive of the driving device 705 . As shown in FIG. 9 , the color wheel 704 and the filter 708 are two annular structures coaxially fixed on the rotating shaft of the driving device 705 . In this embodiment, the color wheel 704 is disposed inside the filter 708 . In other embodiments, the color wheel 704 can be disposed outside the filter 708 . The color wheel 704 comprises a first section 7041 provided with a first wavelength converting material and a second section 7042 provided with a second wavelength converting material. The filter 708 includes a first filter area 7081 and a second filter area or light transmission area 7082 .

At this time, the excitation light 702 generated by the excitation light source 701 is incident on the color wheel 704 driven by the driving device 705 through the top opening of the reflection device 703, so that the excitation light 702 acts on the first segment 7041 and the second segment in sequence. 7042.

When the excitation light 702 is incident on the first section 7041 , the excitation light 702 is converted into the first color light 706 by the first wavelength conversion material on the first section 7041 and reflected by the first section 7041 . The first color light 706 reflected by the first segment 7041 is reflected by the reflecting device 703 to the light collecting device 707, and after being relayed by the light collecting device 707, it enters the first filter of the filter 708 that moves synchronously with the color wheel 704 District 7081 on. The first filter area 7081 filters the first color light 706 and outputs the second color light 709 .

When the excitation light 702 is incident on the second segment 7042 , the excitation light 702 is converted into the third color light 710 by the second wavelength conversion material on the second segment 7042 and reflected by the second segment 7042 . The third color light 710 reflected by the second section 7042 is reflected by the reflector 703 to the light collection device 707, and after being relayed by the light collection device 707, it enters the second filter area of the filter 708 that moves synchronously with the color wheel 704 or the light-transmitting region 7082, and is filtered or transmitted by the second filter region or the light-transmitting region 7082. In this embodiment, the color of the third color light 710 may remain unchanged after being filtered or transmitted by the second filter area or the light transmission area 7082 . For example, the excitation light 702 can be ultraviolet light or near ultraviolet light, and the first wavelength conversion material is yellow light phosphor, which converts the excitation light 702 into yellow light and filters it into red light through the first filter region 7081 . The second wavelength conversion material is green phosphor or blue phosphor, which converts the excitation light 702 into green or blue light, and still outputs green or blue light after being filtered or transmitted by the second filter area or light transmission area 7082. blu ray. It should be noted that there may be more than two second sections 7042, for example, two second sections 7042 are provided to carry green phosphor and blue phosphor respectively. Please refer to FIG. 10 , which is a schematic structural diagram of a fifth embodiment of the light source assembly of the present invention. As shown in FIG. 10 , the color wheel assembly of this embodiment mainly includes an excitation light source 901 , a color wheel 903 , a driving device 904 , a light collecting device 906 and a filter 907 . The difference between the light source assembly in this embodiment and the fourth embodiment shown in FIG. 8 is that in this embodiment, the color wheel 903 is a transmissive color wheel, which transmits the first wavelength converted by the first wavelength conversion material. A color light and a third color light converted by the second wavelength conversion material. It should be noted that if the excitation light generated by the excitation light source 901 can be used for subsequent applications, for example, the excitation light is blue light and used for subsequent display, the second section of the color wheel 903 in this embodiment can be set to transmit or filter the excitation light , and the second filter area or light transmission area of the filter 907 filters or transmits the excitation light transmitted or filtered by the second section of the color wheel 903 again.

Please refer to FIG. 11 , which is a schematic structural diagram of an embodiment of the light source system of the present invention. As shown in FIG. 11 , the light source system of this embodiment mainly includes a first light source assembly 100 , second light source assemblies 200 and 300 , and an optical path combining device 400 . In this embodiment, the first light source assembly 100 is the light source assembly of the first embodiment shown in FIG. 2 . In other embodiments, the first light source assembly 100 may also be any light source assembly described in the above embodiments of the present invention. The second light source assembly 200, 300 is a conventional light source assembly based on a fluorescent color wheel. For example, the first light source assembly 100 generates red light through the method described in the present invention, while the second light source assembly 200, 300 uses the traditional method to generate blue light and green light, and the three light paths are combined by the light path combining device 400 for subsequent use. show. Certainly, in other embodiments, the second light source assembly 200 or 300 may also adopt the light source assembly described in the above embodiments of the present invention.

The present invention also relates to a projection device, the light source assembly of the projection device adopts the light source assembly of the above-mentioned embodiments of the present invention.

Through the above method, the light source assembly, light source system and projection device of the present invention use the first wavelength conversion material capable of converting the excitation light into the first color light to cooperate with the filter to generate the second color light, so as to avoid relatively expensive The wavelength conversion material with high or poor performance that directly absorbs the excitation light to generate the second color light reduces the cost of the light source system and improves the light conversion efficiency of the light source system.

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 (17)

1. A light source assembly, characterized in that the light source assembly comprises: Excitation light source, used to generate an excitation light; a color wheel, a first wavelength conversion material is arranged on the color wheel, and the first wavelength conversion material converts the excitation light into light of a first color; A driving device, the driving device drives the color wheel, so that the light spot generated by the excitation light on the color wheel acts on the first wavelength conversion material along a predetermined path; an optical filter, the optical filter A first filter area is provided, and the first filter area filters the first color light to generate a second color light, wherein the difference between the dominant wavelength of the first color light and the second color light The difference is greater than or equal to 3 nanometers nm; a light collection device arranged between the color wheel and the filter, the light collection device reduces the divergence angle of the first color light incident on the filter; Wherein the color wheel and the filter are two annular structures coaxially fixed on the rotating shaft of the driving device. 2. The light source assembly according to claim 1, wherein the dominant wavelength of the first color light is greater than 520 nm and less than 590 nm, and the dominant wavelength of the second color light is greater than 590 nm. 3. The light source assembly according to claim 2, wherein the first color light is green light or yellow light, and the second color light is red light. 4. The light source assembly according to claim 1, wherein the dominant wavelength of the first color light is greater than 570nm and smaller than 590nm, and the dominant wavelength of the second color light is less than 570nm. 5. The light source assembly according to claim 4, wherein the first color light is yellow light, and the second color light is green light or cyan light. 6. The light source assembly according to claim 1, wherein the light conversion efficiency of the first wavelength conversion material is greater than 15%. 7. The light source assembly according to claim 1, wherein the difference between the dominant wavelengths of the first color light and the second color light is greater than or equal to 10 nm. 8. The light source assembly according to claim 1, wherein the color wheel comprises at least two sections, and the first wavelength converting material is disposed on a first section of the at least two sections, The second section of the at least two sections is provided with a second wavelength conversion material or is arranged to transmit or filter the excitation light, and the driving device drives the color wheel, so that the excitation light acts sequentially in the first section and the second section. 9. The light source assembly according to claim 8, wherein the filter is further provided with a second filter area or a light transmission area, and the excitation light passes through the first section on the first section. The first color light converted by a wavelength conversion material is filtered through the first filter area, and the excitation light is converted by the second wavelength conversion material on the second section to generate third color light or The excitation light transmitted or filtered by the second section is filtered or transmitted through the second filter area or the light transmission area. 10. The light source module according to claim 1, wherein the color wheel is configured to transmit or reflect the first color light. 11. The light source assembly according to claim 10, wherein the color wheel is configured to reflect the light of the first color, the light source assembly further comprises an arc-shaped reflective device with a reflective surface inside, the The arc-shaped reflecting device reflects the first color light reflected by the color wheel to the filter. 12 . The light source assembly according to claim 11 , wherein the exciting light is incident on the color wheel through the top opening of the arc-shaped reflecting device. 13 . 13. The light source assembly according to claim 10, wherein the color wheel is configured to reflect light of the first color, and the filter is disposed between the color wheel and the excitation light source dichroic mirror, the dichroic mirror transmits the excitation light while reflecting the second color light and transmitting the remaining spectral components of the first color light, or the dichroic mirror reflects the excitation light light while transmitting the second color light and reflecting the remaining spectral components of the first color light. 14. The light source assembly according to claim 1, wherein the light collection device is a lens or a wedge-shaped light guide. 15. A light source system, characterized in that the light source system comprises the first light source assembly according to any one of claims 1-14. 16. The light source system according to claim 15, characterized in that, the light source system further comprises a second light source assembly and an optical path combining device, and the optical path combining device combines the second color generated by the first light source assembly The light is merged with the light generated by the second light source assembly. 17. A projection device, characterized in that the projection device comprises the light source assembly according to any one of claims 1-14.