CN207164363U - The light-source system of colour wheel and the application colour wheel, optical projection system - Google Patents

Abstract

It the utility model is related to the light-source system of a kind of colour wheel and the application colour wheel, optical projection system, the colour wheel includes the prebasal plate and metacoxal plate allowed light through, and the spectro-film that order is placed between prebasal plate and metacoxal plate, first low-index layer, fluorescent film, 2nd index layer and filter coating, spectro-film transmits the first light and the second light of reflection, fluorescent film includes at least one first coloured light area, first coloured light area absorbs the first light to generate the second light, filter coating includes the corresponding first coloured light area of at least one first transparent area, first transparent area allow the second light or by the 3rd light that the second light separates by and reflect other light.It is high using the utility model, the efficiency of light energy utilization.

Description

Color wheel and light source system and projection system using the color wheel

technical field

The utility model relates to the field of projection display, in particular to a color wheel, a light source system and a projection system using the color wheel.

Background technique

Please refer to FIG. 1 , which is a schematic diagram of layer structure of a color wheel in the prior art. The color wheel includes a glass layer 11 , a fluorescent layer 12 and a filter layer 13 . The fluorescent layer 12 is coated on one surface of the glass sheet layer 11 , and the filter layer 13 is disposed on the fluorescent layer 12 . The excitation light penetrates the glass sheet layer 11 and reaches the fluorescent layer 12. The fluorescent layer 12 absorbs the excitation light and generates the received light. Since the received light follows the Lambertian distribution, it will exit toward the surroundings. Therefore, except for a part of the transmission filter layer, the other part The stimulated light will exit from the incident side of the excitation light, resulting in the loss of the stimulated light, resulting in low light utilization.

Utility model content

In view of the above situation, the utility model provides a color wheel, a light source system and a projection system with high utilization rate of light energy.

On the one hand, the utility model provides a color wheel, the color wheel includes a front substrate and a rear substrate that allow light to pass through, and a light splitting film and a first low-refractive index layer sequentially placed between the front substrate and the rear substrate. , a fluorescent film, a second refractive index layer, and a filter film, the splitting film transmits the first light and reflects the second light, the fluorescent film includes at least one first color zone, and the first color zone absorbs The first light is used to generate the second light, and the filter film includes at least one first light-transmitting area corresponding to the first color light area, and the first light-transmitting area allows the second light or the light separated from the second light The third light passes through and reflects other light, wherein the first light not absorbed by the first color light region is at least partially reflected by the first light-transmitting region, and enters the first light through the second low refractive index layer. A colored light area, which is absorbed by the first colored light area and generates second light again, and the second light is reflected by the light splitting film and enters the first colored light area through the first low refractive index layer , and then reach the first light-transmitting region through the first colored light region and the second low-refractive index layer, and the first light-transmitting region transmits the second light or splits the second light into the second light three lights and transmits the third light.

On the other hand, the utility model also provides a light source system, the light source system includes a light emitting unit and the above-mentioned color wheel, the monochromatic light emitted by the light emitting unit is converted into polychromatic light by the color wheel and emitted.

In yet another aspect, the present utility model also provides a projection system, which includes the above-mentioned light source system, a spatial light modulator, and a projection lens. The polychromatic light emitted from the light source system is modulated into Image light carrying image information, the image light is emitted to a screen through the projection lens.

The advantages of the color wheel, light source system and projection system provided by the embodiment of the present invention are: due to the light-splitting film is arranged inside the color wheel and the low-refractive index layer is set between the fluorescent film, the light-splitting film and the light filter film, so that the light passing through The first light that is not absorbed by the fluorescent film can be reflected back by the filter film, and is absorbed by the fluorescent film again to generate the second light again, and at least part of the regenerated second light can be reflected back to the fluorescent film by the dichroic film , and exit through the fluorescent film and the filter film, or split the third light from the regenerated second light, and the third light exits through the filter film, thus improving the light utilization rate.

Description of drawings

FIG. 1 is a schematic structural diagram of a color wheel in the prior art.

Fig. 2 is a structural schematic diagram of a color wheel according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of segmental division of fluorescent films in the color wheel shown in FIG. 2 .

FIG. 4 is a schematic diagram of section division of the filter film in the color wheel shown in FIG. 2 .

Fig. 5 is a schematic diagram of the emission of the received light when the fluorescent film and the filter film are directly bonded.

Figure 6 is a schematic diagram of the emission of the received light when the fluorescent film is directly attached to the transparent blue anti-yellow film.

Fig. 7 is a schematic block diagram of a light source system in an embodiment of the present invention.

FIG. 8 is a schematic block diagram of a projection system in an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 2 , which is a schematic structural diagram of an embodiment of the color wheel of the present invention. The color wheel 2 is roughly disc-shaped (not shown) viewed from the front and back, and includes a sapphire plate 21 on the front and a glass plate 22 on the back. Viewed from the side, the sapphire sheet 21 and the glass sheet 22 are spaced apart. In the middle area of the color wheel 2 , an adhesive layer 23 is provided between the sapphire sheet 21 and the glass sheet 22 , and the sapphire sheet 21 and the glass sheet layer 22 are bonded and fixed by the adhesive layer 23 . In the peripheral region of the color wheel 2, an anti-reflection film 24 is provided on the side of the sapphire sheet 21 away from the glass sheet 22, and a transparent blue anti-yellow film 25 and a fluorescent film 26 are sequentially arranged between the sapphire sheet 21 and the glass sheet 22 With a filter film 27. Wherein the anti-reflection film 24, the transparent blue anti-yellow film 25, the fluorescent film 26 and the light filter film 27 are all roughly annular, so that they can be arranged around the peripheral area of the color wheel 2, and the transparent blue anti-yellow film 25 is stacked on On the sapphire sheet 21, the filter film 27 is stacked on the glass sheet 22, and the fluorescent film 26 is separated from the transparent blue anti-yellow film 25 and the filter film 27. In this embodiment, the fluorescent film 26 and the transparent The blue anti-yellow film 25 and the filter film 27 are roughly separated by 10 μm, and dry glass powder layers 28 and 29 are respectively arranged between the fluorescent film 26 and the transparent blue anti-yellow film 25 and the filter film 27. Each dry glass The thickness of the powder layers 28 and 29 is approximately 10 μm, so that the sapphire sheet 21 and the glass sheet 22 physically support or clamp the fluorescent film 26 .

In this embodiment, the fluorescent film 26 contains resin and glue, so the dry glass frit layers 28 and 29 can be respectively adsorbed on both sides of the fluorescent film 26 by spraying, thereby hardening the fluorescent film to a certain extent.

In this embodiment, the thickness of the fluorescent film 26 is approximately 100 μm.

Please refer to FIG. 3 , the fluorescent film 26 is sequentially provided with a red light area 261 , a green light area 262 , a blue light area 263 and a yellow light area 264 along its circumferential direction. The red light area 261 and the yellow light area 264 are formed by mixing resin, glue and yellow phosphor, the green light area 262 is formed by mixing resin, glue and green phosphor, and the blue light area is formed by mixing resin, glue and scattering powder. In this embodiment, the central angles corresponding to the red light area 261 , the green light area 262 , the blue light area 263 and the yellow light area 264 are 115 degrees, 92 degrees, 70 degrees, and 83 degrees, respectively.

Please refer to FIG. 4, corresponding to the arrangement of the red light area 261, the green light area 262, the blue light area 263 and the yellow light area 264 on the fluorescent film 26, the filter film 27 is sequentially provided with a red light area 271, a red light area 271, The green light-transmitting area 272, the anti-reflection area 273 and the yellow light-transmitting area 274. In this embodiment, the red light-transmitting area 271 is provided with a red light-transmitting film, and the green light-transmitting area 272 is provided with a green light-transmitting film and an anti-reflection area. 273 is provided with an anti-reflection film, and the yellow light transmission area 274 is provided with a yellow light transmission film.

In this embodiment, since the dry glass frit layers 28 and 29 are formed by adsorbing dry glass particles on the fluorescent film 26, the dry glass frit layer 28 and the transparent blue anti-yellow film 25, the fluorescent film 26 and the filter film 27 There is an air gap between them. Due to the existence of the transparent blue anti-yellow film 25 and the air gap, the part of the light reflected by the filter film 27 will be reused and finally transmitted through the filter film 27 and the glass sheet 22, thereby improving the utilization rate of light. The optical function of the color wheel 2 will be described below by taking blue light, specifically blue laser light, entering the color wheel 2 and generating red light through the color wheel 2 as an example.

The blue light of the exciting light transmits the anti-reflection film 24, the sapphire sheet 21, the transparent blue anti-yellow film 25 in turn, and passes through the air gap and the dry glass frit layer 28, and then irradiates the fluorescent film 26 to excite the yellow color in the red light area 261 of the fluorescent film 26. Phosphors produce stimulated yellow light. The yellow light emitted from the fluorescent film 26 at least partly passes through the air gap and the dry glass frit layer 29 and then irradiates to the red light-transmitting region 271 of the filter film 27. The yellow light is divided into red light and green light, wherein the red light is transmitted through the filter film 27 and then further transmits through the glass sheet 22 and emerges, and the green light and the unabsorbed blue light are reflected by the red light-transmitting area 271 of the filter film 27 . After the reflected blue light passes through the fluorescent film 26, the fluorescent film 26 is excited to generate yellow light again, and the regenerated yellow light is irradiated to the transparent blue anti-yellow film 25 after passing through the dry glass powder layer 28 and the air gap, and passes through the transparent blue anti-yellow film. 25 after reflection, through the dry glass powder layer 28, fluorescent film 26 and dry glass powder layer 29, at least partly through the red light region 271 of the filter film 27 and the glass sheet 22, so as to improve the brightness of the emitted red light and improve the light utilization.

In the above embodiments, the dry glass frit layer 29 is not completely attached to the fluorescent film 26 and the filter film 27 . Between the dry glass powder layer 29 and the fluorescent film 26, there are some dry glass particles in the dry glass powder layer 29 that are in contact with the fluorescent film 26, and except for the area where these dry glass particles contact the fluorescent film 26, the dry glass particles An air gap is formed between most regions of the glass frit layer 29 and the fluorescent film 26. Since the refractive index difference between the air (refractive index 1) and the fluorescent film 26 (refractive index 1.5-1.8) is far away, large angle When the incident light reaches the interface between the fluorescent film 26 and the dry glass frit layer 29 , it will be totally reflected. In the same way, an air gap is formed between most of the dry glass frit layer 29 and the filter film 27, and since the refractive index difference between the air and the filter film 27 is far away, the light incident at a large angle reaches the filter film 27. Total reflection occurs at the interface between the film 27 and the dry glass frit layer 29 . In this way, the fluorescent film 26 and the filter film 27 are avoided from being directly bonded, and the incident light is allowed to pass through the filter film 27 and the glass sheet 22 due to the similar refractive index of the fluorescent film 26 and the filter film 27, so that the unidentified The blue light part absorbed by the fluorescent film 26 is reflected by the filter film 27 to the fluorescent film 26, and is absorbed by the fluorescent film 26 to generate yellow light again. Please refer to FIG. 5 , if the fluorescent film 26 and the filter film 27 are directly bonded without adding a dry glass powder layer 29 , during the period when the color wheel 2 emits red light, green light or blue light that is not absorbed by the fluorescent film 26 It will pass through the filter film 27 and further transmit to the glass sheet 22, and at least part of the green light or blue light will exit from the peripheral surface of the glass sheet 22, so that the effect of reflecting blue light and green light cannot be achieved. And if the anti-reflection coating is set on the side of the glass sheet 22 far away from the filter film 27, then part of the blue light and green light will be emitted from the side of the glass sheet 22 away from the filter film 27, and the reflected blue light and green light cannot be achieved. Effect.

In the same way, a dry glass powder layer 28 is set between the fluorescent film 26 and the transparent blue anti-yellow film 25, because the refractive index difference between the air and the fluorescent film 26 and the transparent blue anti-yellow film 25 is far away, so avoiding the transparent The blue anti-yellow film 25 is directly attached to the fluorescent film 26, and the incident light is allowed to pass through the blue anti-yellow film 25 and the sapphire sheet 21 due to the similar refractive index of the two, so that the yellow light generated by the fluorescent film 26 can be transmitted through the blue The anti-yellow film 25 reflects and finally emits from the filter film 27, so as to improve light utilization efficiency. Please refer to shown in Fig. 6, if dry glass frit layer 28 is not provided between fluorescent film 26 and transparent blue anti-yellow film 25 and directly bonded, no anti-reflection film is provided on the side of sapphire sheet 21 away from transparent blue anti-yellow film 25 In the case of 24, part of the yellow light is emitted from the peripheral surface of the sapphire sheet 21 and lost. In the case where the anti-reflection film 24 is provided on the side of the sapphire sheet 21 away from the blue-transparent yellow-reflective film 25 , at least part of the yellow light will further penetrate the anti-reflection film 24 and be lost. And exchange the positions of the sapphire sheet 21 and the transparent blue anti-yellow film 25, based on the same principle, the laser light will also be lost.

Therefore, the dry glass powder layers 28 and 29 with low refractive index are set on both sides of the fluorescent film 26, which will help the blue light not absorbed by the fluorescent film 26 to be reflected back to the fluorescent film 26 again, so that the fluorescent film 26 can generate yellow light again, and then The generated yellow light can be at least partly reflected and finally emits red light through the filter film 27 and the glass sheet 22, thereby increasing the brightness of the red light and improving the light utilization rate.

On the other hand, since the refractive index difference between the fluorescent film 26 and the air gap is relatively large, when the fluorescent light generated inside the fluorescent film 26 exits to the interface between the fluorescent film 26 and the air gap at a large angle, the fluorescent light will be reflected, and the fluorescent light will be reflected at a small angle. The fluorescent light emitted from the fluorescent film 26, so that most of the fluorescent light emitted from the side of the fluorescent film 26 near the filter film 27 is approximately the same as the incident direction of the excitation light, while the direction from the fluorescent film 26 near the transparent blue anti-yellow film 25 side Most of the emitted fluorescent light is roughly opposite to the incident direction of the excitation light, and the fluorescent light emitted from the side of the fluorescent film 26 close to the transparent blue anti-yellow film 25 is reflected by the anti-blue transparent yellow film 25 and then further penetrates the fluorescent film 26 and passes through the fluorescent film 26. The light is emitted from the side close to the filter film 27. Therefore, the existence of the air gap helps more fluorescent light to exit from the side of the fluorescent film 26 close to the filter film 27 in the same direction as the incident direction of the excitation light, which is helpful for the collection of fluorescent light and improves light utilization efficiency.

Similarly, using blue light to generate green light and yellow light through the color wheel 2 can both increase the brightness of the outgoing green light and yellow light.

It can be understood that, in other embodiments, the fluorescent film 26 can be formed by mixing phosphor powder and glass powder and then sintering. After mixing phosphor powder and glass powder, they are placed on a substrate for sintering. After sintering and forming, the substrate Separated from the fluorescent film 26 .

It can be understood that, in other embodiments, the transparent blue anti-yellow film 25 may only allow the transmission of blue light incident at a small angle, for example, only allow the transmission of blue light within 0 to 20 degrees from the optical axis of the transparent blue anti-yellow film 25 .

It can be understood that, in other embodiments, the dry glass powder layers 28 and 29 can also be replaced by other low-refractive index layers such as porous silicon dioxide layers, and the refractive index of the low-refractive index layer is below 1.3, preferably below 1.2 .

It can be understood that, in other embodiments, an anti-reflection film may also be provided on the side of the glass sheet 22 away from the fluorescent film 26 .

It can be understood that in other embodiments, the thickness of the dry glass frit layers 28 and 29 is not limited to 10 μm, but can be any value less than 50 μm, preferably 10-15 μm. The thickness of the fluorescent film 26 is not limited to 100 μm, and can be any value smaller than 200 μm.

It can be understood that the angles of the circle centers corresponding to the red light area 261 , the green light area 262 , the blue light area 263 and the yellow light area 264 on the fluorescent film 26 can be changed according to actual needs.

It can be understood that the fluorescent film 26 may only include the red light area 261, the green light area 262 and the blue light area 263, and correspondingly, the filter film 27 may only include the red light transmission area 271, the green light transmission area 272 and the anti-reflection area. 273.

In the above embodiment, the blue-transparent and yellow-reflecting film 25 transmits the first light (blue light) and reflects the second light (yellow light). Therefore, the blue light can enter the fluorescent film 26 through the transparent blue-reflecting yellow film 25, and the fluorescent film 26 Contains at least one first color light area such as red light area 261, green light area 262 and/or yellow light area 264, the first color light area absorbs the first light to generate second light, and the second light passes through the filter film 27 separates the third light (red light or green light) and transmits the third light, or the second light is directly transmitted through the filter film 27, and the fluorescent film 26 can also include a second colored light area such as a blue light area, so The second color light region allows the first light to directly pass through the fluorescent film 26 and finally pass through the filter film 27 . Correspondingly, the filter film 27 includes at least one first light-transmitting region such as a red-light-transmitting region 271, a green-light-transmitting region 272 and/or a yellow-light-transmitting region 274 to correspond to the first color light region of the fluorescent film 26, so The above-mentioned first light-transmitting area allows the second light or the third light to pass through and reflect other light, therefore, the first light not absorbed by the fluorescent film 26 will be reflected back to the fluorescent film 26 by the first light-transmitting area, and will be reflected by the fluorescent film 26. Absorb and regenerate the second light, and the regenerated second light is emitted to the transparent blue anti-yellow film 25, is reflected by the transparent blue anti-yellow film 25, passes through the fluorescent film 26, and finally passes through the first light-transmitting area of the filter film 27 or, the regenerated second light is separated by the first light-transmitting area of the filter film 27 into the third light and transmitted. The filter film 27 may include a second light-transmitting area corresponding to the second color light area of the fluorescent film 26, and the second light-transmitting area allows the first light to pass through. In other embodiments, the blue-transparent and yellow-reflecting film 25 can also be replaced by a combined film for light splitting. The film 25 can be composed of a combination of a transparent blue anti-red film and a transparent blue anti-green film. In addition, in other embodiments, the first light is not limited to blue light, the second light is not limited to yellow light, and the third light is not limited to red light or green light. Based on the selected first light, second light, and /or the difference of the third light, the transparent blue anti-yellow film 25 can also be replaced by other dichroic films.

In the above embodiments, the sapphire sheet 21 and the glass sheet 22 constitute the front substrate and the rear substrate of the color wheel 2 respectively, the front substrate of the color wheel 2 may be a quartz sheet or a glass sheet in other embodiments, and the rear substrate may be a quartz sheet or a glass sheet in other embodiments. It can also be a quartz sheet or a sapphire sheet.

Please refer to FIG. 7, which is a schematic block diagram of a light source system. The light source system 100 includes a color wheel 2 and a light emitting unit 3. The monochromatic light such as blue light emitted from the light emitting unit 3 is converted into polychromatic light by the color wheel 2. Such as red, green, blue, yellow four-color light.

Please refer to FIG. 8 , which is a schematic block diagram of a projection system. The projection system 200 includes a light source system 100 , a spatial light modulator 4 and a projection lens 5 . The polychromatic light emitted from the light source system 100 is modulated by the spatial light modulator 4 into image light carrying image information, and finally emitted to the screen through the projection lens 5 .

To sum up, the color wheel, the light source system and the projection system provided by the embodiment of the utility model, because the light-splitting film is arranged inside the color wheel and the low-refractive index layer is set between the fluorescent film, the light-splitting film and the light filter film, thus The first light that passes through the fluorescent film but is not absorbed by the fluorescent film can be reflected back by the filter film, and is absorbed by the fluorescent film again to generate the second light again, and at least part of the second light generated again can be reflected back by the spectroscopic film The fluorescent film is emitted through the fluorescent film and the filter film, or the third light is separated from the regenerated second light, and the third light is emitted through the filter film, thereby improving the light utilization rate.

The above embodiments are only used to illustrate the technical solution of the present utility model without limitation. Although the utility model has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solution of the utility model can be modified Or equivalent replacements should not deviate from the spirit and scope of the technical solutions of the present utility model.

Claims (17)

1. A color wheel, characterized in that, the color wheel includes a front substrate and a rear substrate that allow light to pass through, and a light splitting film, a first low-refractive index layer, and a light-splitting film sequentially placed between the front substrate and the rear substrate A fluorescent film, a second low-refractive index layer, and a light filter film, the splitting film transmits the first light and reflects the second light, the fluorescent film includes at least one first color light region, and the first color light region absorbs the second light A light is used to generate the second light, and the filter film includes at least one first light-transmitting area corresponding to the first color light area, and the first light-transmitting area allows the second light or the first light separated from the second light The three lights pass through and reflect other lights, wherein the first light not absorbed by the first color light region is at least partially reflected by the first light-transmitting region, and enters the first light through the second low-refractive index layer. a colored light area, which is absorbed by the first colored light area and generates second light again, and the second light is reflected by the light splitting film and enters the first colored light area through the first low refractive index layer, Then reach the first light transmission area through the first colored light area and the second low refractive index layer, and the first light transmission area transmits the second light or separates the second light into a third light. light and transmit the third light. 2. The color wheel according to claim 1, wherein the fluorescent film comprises a second color light area, the second color light area transmits the first light, and the filter film comprises a second light transmission area Corresponding to the second color light area, the second color light area transmits the first light transmitted through the second color light area. 3 . The color wheel according to claim 1 , further comprising an antireflection film disposed on a side of the front substrate away from the light splitting film. 4 . 4. The color wheel according to claim 1, wherein the light splitting film, the first low-refractive index layer, the fluorescent film, the second low-refractive index layer and the filter film are arranged in the peripheral area of the color wheel . 5 . The color wheel according to claim 4 , wherein the middle area of the color wheel comprises an adhesive layer, and the adhesive layer is used for bonding and fixing the front substrate and the rear substrate. 6. The color wheel according to claim 1, wherein the front substrate is a sapphire sheet, a glass sheet or a quartz sheet, and/or the rear substrate is a glass sheet, a quartz sheet or a sapphire sheet. 7. The color wheel according to claim 2, wherein the light-splitting film is a transparent blue anti-yellow film, the first light is blue light, and the second light is yellow light. 8. The color wheel according to claim 7, wherein the fluorescent film comprises three first color light zones, which are respectively red light zone, green light zone and yellow light zone, and the filter film comprises three a first light-transmitting area, respectively a red-light-transmitting area, a green-light-transmitting area, and a yellow-light-transmitting area, wherein the red-light-transmitting area corresponds to the red-light area, and the green-light-transmitting area corresponds to the green-light area . The yellow light transmission area corresponds to the yellow light area, the second color light area is a blue light area, the second light transmission area is an anti-reflection area, and the third light is red light or green light. 9. The color wheel according to claim 8, characterized in that, the red light area and the yellow light area are provided with yellow fluorescent powder, the green light area is provided with green fluorescent powder, the blue light area is provided with scattering powder, and the The red light-transmitting area is provided with a red-light-transmitting film, the green-light-transmitting area is provided with a green-light-transmitting film, the yellow-light-transmitting area is provided with a yellow-light-transmitting film, and the anti-reflection area is provided with an anti-reflection film. 10. The color wheel according to claim 1, wherein the refractive index of the first low refractive index layer is 1.3 or less than 1.2, and/or the refractive index of the second low refractive index layer is 1.3 or below 1.2. 11. The color wheel according to claim 10, wherein the first low-refractive index layer is a dry glass powder layer or a silicon dioxide layer, and/or the second low-refractive index layer is dry glass Powder layer or silica layer. 12. The color wheel according to claim 10, wherein the thickness of the first low refractive index layer is less than 50 μm or 10-15 μm, and/or the thickness of the second low refractive index layer is less than 50 μm Or 10-15μm. 13. The color wheel according to claim 11, wherein the dry glass powder layer is formed by absorbing dry glass particles on the fluorescent film. 14. The color wheel according to claim 1, wherein the thickness of the fluorescent film is less than 200 μm, or the thickness of the fluorescent film is 100 μm. 15 . The color wheel according to claim 1 , wherein the dichroic film only allows transmission of the first light at an angle of 0 to 20 degrees from the optical axis of the dichroic film. 16. A light source system, characterized by comprising a light emitting unit and the color wheel according to any one of claims 1-15, the monochromatic light emitted by the light emitting unit is converted into polychromatic light by the color wheel and emitted. 17. A projection system, comprising the light source system according to claim 16, a spatial light modulator and a projection lens, the polychromatic light emitted from the light source system is modulated by the spatial light modulator to carry The image light of the image information is emitted to a screen through the projection lens.