Illumination system and projection device

Abstract

An illumination system for providing an illumination beam. The lighting system comprises an excitation light source, a fluorescent wheel and a filter wheel. The excitation light source is used for emitting excitation beams. The fluorescent wheel is arranged on a transmission path of the excitation light beam and used for converting the excitation light beam into a conversion light beam, and the conversion light beam is transmitted to the filter wheel. The light filter wheel comprises three areas, each area has a central angle of 120 degrees, each area comprises a light transmission area, a first light filter area and a second light filter area, the light transmission area, the first light filter area and the second light filter area have different central angles, and the rotating speed of the light filter wheel is 10800 rpm when the lighting system is in an operation state. The utility model also provides a projection device with the illumination system. The lighting system and the projection device provided by the utility model can reduce the problem of rainbow effect, and provide higher quietness and safety.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical system and an optical device, and in particular, to an illumination system and a projection device having the same. BACKGROUND

[0002] The "rainbow effect" is a phenomenon unique to single-chip digital light processing (DLP) projection devices. Single-chip DLP projection devices use a color wheel to control colors, and at any given moment, only one color appears on the screen. That is, a single-chip DLP projection device uses a high-speed rotating color wheel to sequentially project red, green, and blue (RGB) primary color light onto a picture, and the human eye perceives the color image due to visual persistence. However, when an object in the picture moves quickly, the speed of the color wheel may not be able to form a complete image of the RGB primary color light on the human eye's retina, and thus the phenomenon of color breaking, or the rainbow effect, occurs.

[0003] The rainbow effect described above has the following effects on the human eye when viewed. The rainbow effect causes visual discomfort, and long-term viewing can cause eye fatigue. Furthermore, the rainbow effect can destroy the continuity of the image and reduce the immersion of the viewing experience. The effect is more pronounced when watching action movies or game pictures.

[0004] In addition, projection devices with a filter wheel can be more prone to severe rainbow stripes than projection devices that use three independent light sources such as RGB light-emitting diodes, RGB lasers, etc. For example, due to improper matching of the color partition of the filter area and the rotation speed of the filter wheel, the human eye can see rainbow stripes. However, projection devices that use three independent light sources such as RGB light-emitting diodes, RGB lasers, etc. are too large in size and do not meet the user's expectations.

[0005] Therefore, to solve the rainbow effect described above, the rotation speed of the filter wheel of the projection device can be increased to 4 times the general rotation speed of the filter wheel (e.g., 14400 rpm). However, although the color breaking problem can be alleviated by increasing the rotation speed, high-frequency noise and vibration are caused, which affects the quietness and safety of the projection device.

[0006] The "BACKGROUND" section is only used to help understand the content of the present application, and the content disclosed in the "BACKGROUND" section may include some known technology that is not known to those skilled in the art. The content disclosed in the "BACKGROUND" section does not represent that the content or the problem to be solved by one or more embodiments of the present application has been known or recognized by those skilled in the art before the present application. SUMMARY

[0007] The utility model provides a kind of lighting system and projection device, it can reduce the problem of rainbow effect, and provide higher quietness and security.In addition, it can also improve the color brightness ratio of image light beam, so that the contrast effect of brightness between color (blue, green, red) and white of image light beam is better, and the correctness of image light beam forming color is strengthened.

[0008] Other purposes and advantages of the utility model can be further understood from the technical features disclosed by the utility model.

[0009] To achieve one or part or all of the above purposes or other purposes, an embodiment of the utility model provides a kind of lighting system for providing illumination light beam.Light illumination system provides illumination light beam, and lighting system at least includes excitation light source, fluorescent wheel and filter wheel.Excitation light source emits excitation light beam.Fluorescent wheel is arranged on the transmission path of excitation light beam, and excitation light beam is converted into conversion light beam, and conversion light beam is transmitted to filter wheel.Filter wheel is arranged on the transmission path of conversion light beam.Filter wheel includes three regions, each region has 120 degrees of central angle, and each region includes light transmission area, first filter area and second filter area.Light transmission area, first filter area and second filter area have different central angles.Under the operating state of lighting system, the rotational speed of filter wheel is 10800rpm.

[0010] To achieve one or part or all of the above purposes or other purposes, an embodiment of the utility model provides a kind of projection device, which includes lighting system, light valve and projection lens.Light illumination system provides illumination light beam.Light valve is configured on the transmission path of illumination light beam, and illumination light beam is converted into image light beam.Projection lens is configured on the transmission path of image light beam, and image light beam is projected out of projection device.Light illumination system at least includes excitation light source, fluorescent wheel and filter wheel.Excitation light source emits excitation light beam.Fluorescent wheel is arranged on the transmission path of excitation light beam, and excitation light beam is converted into conversion light beam, and conversion light beam is transmitted to filter wheel.Filter wheel is arranged on the transmission path of conversion light beam.Filter wheel includes three regions, each region has 120 degrees of central angle, and each region includes light transmission area, first filter area and second filter area.Light transmission area, first filter area and second filter area have different central angles.Under the operating state of lighting system, the rotational speed of filter wheel is 10800rpm.

[0011] Based on the above, in the lighting system and the projection device using the lighting system according to an embodiment of the present application, the lighting system comprises at least an excitation light source, a fluorescent wheel and a filter wheel. The filter wheel comprises three regions, each region has a central angle of 120 degrees, and each region comprises a light transmission region, a first filter region and a second filter region. The light transmission region, the first filter region and the second filter region have different central angles. In the operating state of the lighting system, the rotating speed of the filter wheel is 10800 rpm. Therefore, the lighting system and the projection device improve the frame rate of each color light in the image light beam, thereby reducing the rainbow and color separation phenomenon. Due to the reduction of the rainbow and color separation phenomenon, the lighting system and the projection device can provide better lighting effect and better viewing experience. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a block diagram of a projection device according to an embodiment of the present application.

[0013] Figure 2 is a schematic diagram of a fluorescent wheel in a projection device according to an embodiment of the present application.

[0014] Figure 3 is a schematic diagram of a filter wheel in a projection device according to an embodiment of the present application.

[0015] BRIEF DESCRIPTION OF DRAWINGS

[0016] 10: projection device

[0017] 100: lighting system

[0018] 110: excitation light source

[0019] 120: fluorescent wheel

[0020] 120A1, 120A2, 120A3: light inlet region

[0021] 120R1: light guide region

[0022] 120R2: first light conversion region

[0023] 120R3: second light conversion region

[0024] 130: filter wheel

[0025] 130A1, 130A2, 130A3: region

[0026] 130R1: light transmission region

[0027] 130R2: first filter region

[0028] 130R3: second filter region

[0029] 140: homogenizing element

[0030] 150: controller

[0031] 200: light valve

[0032] 300: projection lens

[0033] C1: first color light

[0034] C2: second color light

[0035] C3: third color light

[0036] F1: first converted light beam

[0037] F2: second converted light beam

[0038] IB: image light beam

[0039] IL: illumination light beam

[0040] IM: image signal

[0041] L: excitation light beam

[0042] S1: first control signal

[0043] S2: second control signal

[0044] S3: third control signal

[0045] S4: fourth control signal

[0046] α1, α2, α3, β1, β2, β3: central angle DETAILED DESCRIPTION

[0047] The above and other technical contents, features and effects of the present application will be apparent from the following detailed description of a preferred embodiment, taken in conjunction with the accompanying drawings. Directional terms used in the following embodiments, such as up, down, left, right, front or rear, are only with reference to the directions of the accompanying drawings. Therefore, the directional terms are used to explain, not to limit the present application.

[0048] Figure 1 is a block diagram of a projection device according to an embodiment of the present application. Please refer to Figure 1 An embodiment of the present application provides a projection device 10, such as a projector, which includes an illumination system 100, a light valve 200 and a projection lens 300. The illumination system 100 is configured to provide an illumination light beam IL. The light valve 200 is disposed on a transmission path of the illumination light beam IL, and is configured to convert the illumination light beam IL into an image light beam IB. The projection lens 300 is disposed on a transmission path of the image light beam IB, and is configured to project the image light beam IB out of the projection device 10.

[0049] In detail, the light valve 200 is a spatial light modulator such as a Digital Micro-mirror Device (DMD), a Liquid-crystal-on-silicon Panel (LCOS Panel), or a Liquid Crystal Panel. The light valve 200 is, for example, a DMD of Digital Optics, which can support image signals with resolutions and frequencies such as 4K UHD 60Hz, 1080p 240Hz, and the like.

[0050] The projection lens 300 is, for example, a combination of one or more optical lenses with refractive indexes. The type and kind of the light valve 200 and the projection lens 300 are not limited in the present application.

[0051] In the present embodiment, the illumination system 100 at least includes an excitation light source 110, a phosphor wheel 120, and a filter wheel 130. The illumination system 100 can further include a light homogenizing element 140, such as an integration rod, a lens array, or other optical elements with light homogenizing effects, but the present application is not limited thereto.

[0052] In the present embodiment, the excitation light source 110 is configured to emit an excitation light beam L. The excitation light source 110 is, for example, at least one Light-Emitting Diode (LED) light source or at least one Laser Diodes (LD) light source. The color of the excitation light beam L is, for example, blue, but the present application is not limited thereto.

[0053] In the present embodiment, the projection device 10 further comprises a controller 150. The controller 150 is electronically connected with the excitation light source 110, the fluorescent wheel 120, the filter wheel 130 and the light valve 200 respectively. The controller 150 is configured to receive an image signal IM and individually control the excitation light source 110, the fluorescent wheel 120, the filter wheel 130 and the light valve 200 according to the image signal IM. For example, the controller 150 generates a first control signal S1 according to the image signal IM and provides the first control signal S1 to the excitation light source 110. The excitation light source 110 adjusts the intensity of the excitation light beam L emitted according to the first control signal S1. The controller 150 generates a second control signal S2 according to the image signal IM and provides the second control signal S2 to the fluorescent wheel 120. The fluorescent wheel 120 adjusts the rotating speed of the fluorescent wheel 120 according to the second control signal S2. The controller 150 generates a third control signal S3 according to the image signal IM and provides the third control signal S3 to the filter wheel 130. The filter wheel 130 adjusts the rotating speed of the filter wheel 130 according to the third control signal S3. The controller 150 generates a fourth control signal S4 according to the image signal IM and provides the fourth control signal S4 to the light valve 200. The light valve 200 controls the swing or switching of the light valve 200 according to the fourth control signal S4. The controller 150 comprises at least one processor, for example, a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a programmable controller, a programmable logic device (PLD) or other similar devices or a combination of these devices, without limitation. The image signal IM is provided to the projection device 10 by an external image source (not shown), for example, a notebook computer, a mobile phone or a cloud server having a storage device for storing multimedia content, and the external image source generates the image signal IM corresponding to the multimedia content.

[0054] Figure 2 FIG. 1 is a schematic diagram of a projection device according to an embodiment of the present application. Figure 3 FIG. 2 is a schematic diagram of a filter wheel in the projection device according to an embodiment of the present application. Please refer to Figures 1 to 3 In the present embodiment, the fluorescent wheel 120 is disposed on the transmission path of the excitation light beam L, and the fluorescent wheel 120 comprises three light-in regions 120A1, 120A2 and 120A3. The three light-in regions 120A1, 120A2 and 120A3 all have a central angle of 120 degrees, as shown in FIG. 1. Figure 2Each light entry region 120A1, 120A2, and 120A3 includes a light guiding region 120R1, a first light converting region 120R2, and a second light converting region 120R3. The light guiding region 120R1 is configured to guide the excitation light beam L to the filter wheel 130. The light guiding region 120R1 can be a reflective layer configured to directly or indirectly reflect the excitation light beam L to the filter wheel 130. The reflective layer refers to a layer formed of a reflective material, such as a reflective coating layer or a reflective sheet. In other embodiments, the light guiding region 120R1 can be a perforated or light transparent plate configured to directly or indirectly transmit the excitation light beam L to the filter wheel 130. The first light converting region 120R2 has a first phosphor layer configured to convert the excitation light beam L to a first converted light beam F1. The second light converting region 120R3 has a second phosphor layer configured to convert the excitation light beam L to a second converted light beam F2.

[0055] The filter wheel 130 is disposed in a transmission path of the first converted light beam F1 provided from the phosphor wheel 120. The filter wheel 130 is disposed in a transmission path of the second converted light beam F2 provided from the phosphor wheel 120. The filter wheel 130 is disposed in a transmission path of the excitation light beam L provided from the phosphor wheel 120. The filter wheel 130 includes three regions 130A1, 130A2, and 130A3, each having a central angle of 120 degrees, as shown. Figure 3 The filter wheel 130 includes three regions 130A1, 130A2, and 130A3, each having a central angle of 120 degrees, as shown. Each region 130A1, 130A2, and 130A3 includes a light transmission region 130R1, a first filter region 130R2, and a second filter region 130R3. The light transmission region 130R1, the first filter region 130R2, and the second filter region 130R3 have different central angles β1, β2, β3 (β1≠ β2≠ β3). The sum of the central angles β1, β2, β3 is 120 degrees. The first filter region 130R2 of the filter wheel 130 is configured to filter the first converted light beam F1 to form a first color light C1, which is transmitted to the light uniformization element 140. The second filter region 130R3 is configured to filter the second converted light beam F2 to form a second color light C2, which is also transmitted to the light uniformization element 140. The light transmission region 130R1 of the filter wheel 130 is configured to transmit, filter, or eliminate laser speckle of the excitation light beam L to form a third color light C3, which is transmitted to the light uniformization element 140. In sequence, the light uniformization element 140 homogenizes the first color light C1, the second color light C2, and the third color light C3 to form the illumination light beam IL. The illumination light beam IL includes at least one of the first color light C1, the second color light C2, and the third color light C3.

[0056] In detail, the light transmission region 130R1 is, for example, transparent glass or plastic, allowing the blue light main spectrum band of the excitation beam L to pass through, thereby forming the third color light C3. In one embodiment, the light transmission region 130R1 is, for example, a diffuser sheet, used to disrupt the coherence of the excitation beam L and eliminate the laser spot, thereby forming the third color light C3. In other embodiments, the light transmission region 130R1 is, for example, a filter, used to filter out other spectral bands of light, such as red or green light, to form the third color light C3. The first filter region 130R2 is, for example, used to allow the green light spectrum band to pass through and filter out other colors of light, thereby forming the first color light C1. The second filter region 130R3 is used to allow the red light spectrum band to pass through and filter out other colors of light, thereby forming the second color light C2.

[0057] In this embodiment, the central angle β1 of the light transmission region 130R1 is 32 degrees, the central angle β2 of the first filter region 130R2 is 38 degrees, and the central angle β3 of the second filter region 130R3 is 50 degrees. In another embodiment, the central angle β1 of the light transmission region 130R1 is 38 degrees, the central angle β2 of the first filter region 130R2 is 40 degrees, and the central angle β3 of the second filter region 130R3 is 42 degrees. Wherein, central angle β3 > β2 > β1.

[0058] In this embodiment, the fluorescent wheel 120 includes light-receiving regions 120A1, 120A2, and 120A3. Taking the light-receiving region 120A1 of the fluorescent wheel 120 as an example, as... Figure 2 As shown. The incident light region 120A1 includes a light guiding region 120R1, a first light conversion region 120R2, and a second light conversion region 120R3, wherein the light guiding region 120R1 has a central angle α1, the first light conversion region 120R2 has a central angle α2, and the second light conversion region 120R3 has a central angle α3, wherein α1≠α2≠α3.

[0059] In the present embodiment, the central angle β1 of the light transmission region 130R1 of the filter wheel 130 is 32 degrees, and the central angle α1 of the light guiding region 120R1 of the fluorescent wheel 120 is 32 degrees. The central angle β2 of the first filter region 130R2 of the filter wheel 130 is 38 degrees, and the central angle α2 of the first light conversion region 120R2 of the fluorescent wheel 120 is 38 degrees. The central angle β3 of the second filter region 130R3 of the filter wheel 130 is 50 degrees, and the central angle α3 of the second light conversion region 120R3 of the fluorescent wheel 120 is 50 degrees. In another embodiment, the central angle β1 of the light transmission region 130R1 of the filter wheel 130 is 38 degrees, and the central angle α1 of the light guiding region 120R1 of the fluorescent wheel 120 is 38 degrees. The central angle β2 of the first filter region 130R2 of the filter wheel 130 is 40 degrees, and the central angle α2 of the first light conversion region 120R2 of the fluorescent wheel 120 is 40 degrees. The central angle β3 of the second filter region 130R3 of the filter wheel 130 is 42 degrees, and the central angle α3 of the second light conversion region 120R3 of the fluorescent wheel 120 is 42 degrees. In which, α3 > α2 > α1.

[0060] In addition, in the present embodiment, the fluorescent wheel 120 further comprises a first motor (not shown) for receiving a second control signal S2 provided by the controller 150, and the first motor adjusts the rotation speed of the fluorescent wheel 120. The filter wheel 130 further comprises a second motor (not shown) for receiving a third control signal S3 provided by the controller 150, and the second motor adjusts the rotation speed of the filter wheel 130. In the present embodiment, in the operating state of the illumination system 100 and the projection device 10, the controller 150 controls the rotation speed of the filter wheel 130 and the fluorescent wheel 120 to reach 10800 rpm, so that the filter wheel 130 and the fluorescent wheel 120 rotate synchronously, in which the filter wheel 130 and the fluorescent wheel 120 both rotate clockwise. In the present embodiment, by synchronizing the rotation speed of the filter wheel 130 and the fluorescent wheel 120, the position of the light transmission region 130R1 of the filter wheel 130 corresponds to the position of the light guiding region 120R1 of the fluorescent wheel 120. The position of the first filter region 130R2 of the filter wheel 130 corresponds to the position of the first light conversion region 120R2 of the fluorescent wheel 120. The position of the second filter region 130R3 of the filter wheel 130 corresponds to the position of the second light conversion region 120R3 of the fluorescent wheel 120.

[0061] That is, the number of regions (130A1-130A3) of the filter wheel 130 is corresponding to the number of light-in regions (120A1-120A3) of the fluorescent wheel 120, and the rotation speed of the filter wheel 130 and the fluorescent wheel 120 is synchronized to 10800 rpm, so as to improve the frame rate of each color light in the image beam IB, and to reduce the rainbow and color separation phenomenon. In addition, the three regions (130A1-130A3) of the filter wheel 130 are designed to include only the light transmission region 130R1, the first filter region 130R2 and the second filter region 130R3 in each region, instead of including two or three of the light transmission region 130R1, the first filter region 130R2 and the second filter region 130R3 in each region, so as to avoid the problem that the central angle of the light transmission region 130R1, the first filter region 130R2 and the second filter region 130R3 is too small, and the luminous flux of each color light in the image beam IB is insufficient to completely present the correct color. Furthermore, the rotation speed of the filter wheel 130 and the fluorescent wheel 120 is improved, but the rotation speed is not too high (for example, 14400 rpm), so as to maintain the quietness and safety of the illumination system 100 or the projection device 10.

[0062] The central angles β1, β2, β3 of the light transmission region 130R1, the first filter region 130R2 and the second filter region 130R3 of the filter wheel 130, and the central angles α1, α2, α3 of the light guide region 120R1, the first light conversion region 120R2 and the second light conversion region 120R3 of the fluorescent wheel 120 are equal. That is, the central angle β1 is equal to the central angle α1, the central angle β2 is equal to the central angle α2, and the central angle β3 is equal to the central angle α3. The central angles β1, β2, β3 and the central angles α1, α2, α3 are designed to be optimized, so that the central angle β3 of the second filter region 130R3 corresponding to the second color light C2 which is less sensitive to the human eye and the central angle α3 of the second light conversion region 120R3 are greater than other central angles, so as to improve the luminous flux of the second color light C2, to improve the brightness of the second color light C2, and to make the color of the image beam IB projected by the projection device 10 more rich.

[0063] In the present embodiment, the excitation light beam L is, for example, blue light, the first converted light beam F1 is, for example, green light, and the second converted light beam F2 is, for example, red light. The first color light C1 is, for example, green light, the second color light C2 is, for example, red light, and the third color light C3 is, for example, blue light. In the present embodiment, the fluorescent wheel 120 and the filter wheel 130 rotate synchronously in the clockwise direction. At a first timing, the light guiding region 120R1 of the fluorescent wheel 120 is switched into the transmission path of the excitation light beam L, and the light guiding region 120R1 guides the excitation light beam L to the light transmission region 130R1 of the filter wheel 130. At a second timing, the first light conversion region 120R2 of the fluorescent wheel 120 is switched into the transmission path of the excitation light beam L, and the first light conversion region 120R2 is used to convert the excitation light beam L into the first converted light beam F1, which is transmitted to the first filter region 130R2 of the filter wheel 130. At a third timing, the second light conversion region 120R3 of the fluorescent wheel 120 is switched into the transmission path of the excitation light beam L, and the second light conversion region 120R3 is used to convert the excitation light beam L into the second converted light beam F2, which is transmitted to the second filter region 130R3 of the filter wheel 130.

[0064] In the present embodiment, the fluorescent wheel 120 does not have a fluorescent powder layer for converting the excitation light beam L into yellow light. That is, the first light conversion region 120R2 and the second light conversion region 120R3 are not excited to generate yellow light. Therefore, the illumination light beam IL is designed not to include yellow light, which can improve the color brightness ratio of the image light beam IB, and thus improve the contrast between the colors (blue, green, and red) and white of the image light beam IB, and enhance the accuracy of the color of the image light beam IB.

[0065] In the present embodiment, the fluorescent wheel 120 described above can be a reflective fluorescent wheel. That is, the first converted light beam F1 converted by the first light conversion region 120R2 and the second converted light beam F2 converted by the second light conversion region 120R3 are reflected by the fluorescent wheel 120.

[0066] In another embodiment, the fluorescent wheel 120 described above can be a transmissive fluorescent wheel. That is, the first converted light beam F1 converted by the first light conversion region 120R2 and the second converted light beam F2 converted by the second light conversion region 120R3 can pass through the fluorescent wheel 120.

[0067] In addition, the illumination system 100 can further include light transmission elements (such as reflective elements or lenses), light splitting elements, light combining elements, and the like, and the present application is not limited to the number and composition of the optical elements in the illumination system 100.

[0068] In summary, in the embodiment of the present application, the lighting system and the projection device at least include an excitation light source, a fluorescent wheel and a filter wheel. The filter wheel includes three regions, each region includes a light transmission area, a first filter area and a second filter area, wherein the light transmission area, the first filter area and the second filter area have different central angles. The filter wheel and the fluorescent wheel have a synchronous rotating speed of 10800 rpm. Therefore, the lighting system and the projection device improve the frame rate of each color light in the image light beam, thereby reducing the phenomenon of rainbow and color separation.

[0069] The above is only the preferred embodiment of the present application, and cannot limit the scope of the present application. Any simple equivalent changes and modifications made according to the claims and content of the present application are still within the scope of the present application. In addition, any embodiment or claim of the present application does not necessarily achieve all the purposes or advantages or features disclosed in the present application. In addition, the abstract and title (application name) are only used to assist patent document retrieval, and are not used to limit the claims of the present application. In addition, the terms "first", "second" and the like mentioned in the specification or claims are only used to name elements or distinguish different embodiments or ranges, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. An illumination system for providing an illumination beam, characterized in that The illumination system comprises at least an excitation light source, a fluorescence wheel and a filter wheel, wherein: The excitation light source is configured to emit an excitation light beam; The fluorescence wheel is disposed in a transmission path of the excitation light beam, and is configured to convert the excitation light beam into a converted light beam, the converted light beam being transmitted to the filter wheel; and The filter wheel is disposed in a transmission path of the converted light beam, wherein the filter wheel comprises three regions, each of the regions having a central angle of 120 degrees, each of the regions comprising a light transmission region, a first filter region and a second filter region, wherein the light transmission region, the first filter region and the second filter region have different central angles, and the filter wheel has a rotation speed of 10800 rpm in an operating state of the illumination system.

2. The lighting system of claim 1, characterized in that The central angle of the second filter region is greater than the central angle of the first filter region, and the central angle of the first filter region is greater than the central angle of the light transmission region.

3. The lighting system of claim 1, wherein, The fluorescence wheel comprises three light entry regions, each of the light entry regions having a central angle of 120 degrees, each of the light entry regions comprising a light guide region, a first light conversion region and a second light conversion region, wherein the light guide region, the first light conversion region and the second light conversion region have different central angles, and the fluorescence wheel has a rotation speed of 10800 rpm in an operating state of the illumination system.

4. The lighting system of claim 3, characterized in that The central angle of the second light conversion region is greater than the central angle of the first light conversion region, and the central angle of the first light conversion region is greater than the central angle of the light guide region.

5. The lighting system of claim 3, wherein, The first light conversion region and the second light conversion region are not excited to generate yellow light.

6. The lighting system of claim 3, wherein, The light guide region of the fluorescence wheel is in the transmission path of the excitation light beam, and the light guide region is configured to guide the excitation light beam to the light transmission region of the filter wheel.

7. The lighting system of claim 3, wherein, The first light conversion region of the fluorescence wheel is in the transmission path of the excitation light beam, and the first light conversion region is configured to convert the excitation light beam into a first converted light beam, the first converted light beam being transmitted to the first filter region of the filter wheel.

8. The lighting system of claim 3, wherein, The second light conversion region of the fluorescence wheel is in the transmission path of the excitation light beam, and the second light conversion region is configured to convert the excitation light beam into a second converted light beam, the second converted light beam being transmitted to the second filter region of the filter wheel.

9. The lighting system of claim 1, wherein, The filter wheel is configured to receive the converted light beam provided from the fluorescence wheel, and the filter wheel is configured to form colored light.

10. The lighting system of claim 9, characterized in that The illumination system further comprises a light homogenizing element configured to receive the colored light provided from the filter wheel, and the light homogenizing element is configured to homogenize the colored light to form the illumination light beam.

11. A projection apparatus, characterized by comprising: The projection device comprises an illumination system, a light valve and a projection lens, wherein the illumination system is configured to provide an illumination light beam, the light valve is disposed in a transmission path of the illumination light beam and is configured to convert the illumination light beam into an image light beam, and the projection lens is disposed in a transmission path of the image light beam and is configured to project the image light beam out of the projection device; wherein the illumination system comprises an excitation light source, a fluorescence wheel and a filter wheel, wherein: The excitation light source is configured to emit an excitation light beam; The fluorescent wheel is disposed on a transmission path of the excitation light beam for converting the excitation light beam into a converted light beam, the converted light beam being transmitted to the filter wheel; and The filter wheel is disposed on a transmission path of the converted light beam, wherein the filter wheel comprises three regions, each of the regions having a central angle of 120 degrees, each of the regions comprising a light transmission region, a first filter region and a second filter region, wherein the light transmission region, the first filter region and the second filter region have different central angles, and the filter wheel has a rotation speed of 10800 rpm in an operating state of the illumination system.

12. The projection apparatus according to claim 11, wherein, The central angle of the second filter region is greater than the central angle of the first filter region, and the central angle of the first filter region is greater than the central angle of the light transmission region.

13. The projection apparatus according to claim 11, wherein The fluorescent wheel comprises three light entry regions, each of the light entry regions having a central angle of 120 degrees, each of the light entry regions comprising a light guiding region, a first light conversion region and a second light conversion region, wherein the light guiding region, the first light conversion region and the second light conversion region have different central angles, and the fluorescent wheel has a rotation speed of 10800 rpm in an operating state of the illumination system.

14. The projection apparatus according to claim 13, wherein, The central angle of the second light conversion region is greater than the central angle of the first light conversion region, and the central angle of the first light conversion region is greater than the central angle of the light guiding region.

15. The projection apparatus according to claim 13, wherein, The first light conversion region and the second light conversion region are not excited to generate yellow light.

16. The projection apparatus according to claim 13, wherein The light guiding region of the fluorescent wheel is on a transmission path of the excitation light beam, the light guiding region being used to guide the excitation light beam to the light transmission region of the filter wheel.

17. The projection apparatus of claim 13, wherein The first light conversion region of the fluorescent wheel is on a transmission path of the excitation light beam, the first light conversion region being used to convert the excitation light beam into a first converted light beam, the first converted light beam being transmitted to the first filter region of the filter wheel.

18. The projection apparatus of claim 13, wherein The second light conversion region of the fluorescent wheel is on a transmission path of the excitation light beam, the second light conversion region being used to convert the excitation light beam into a second converted light beam, the second converted light beam being transmitted to the second filter region of the filter wheel.

19. The projection apparatus of claim 11, wherein The filter wheel is used to receive the converted light beam provided from the fluorescent wheel, the filter wheel being used to form colored light.

20. The projection apparatus according to claim 19, wherein, Further comprising a light homogenizing element, the light homogenizing element being used to receive the colored light provided from the filter wheel, the light homogenizing element being used to homogenize the colored light to form the illumination light beam.

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