CN103091955B - Illumination system and projection device - Google Patents

Abstract

A lighting system and a projection device, the lighting system includes a light source, a filter module, a wavelength conversion unit and a reflection unit. The light source is used to emit an illumination beam, and the filter module is arranged on the transmission path of the illumination beam. The filter module includes a plurality of filter units of different colors, and these filter units cut into the transmission path of the illumination beam in turn. Each filter unit reflects part of the illumination beam and allows another part of the illumination beam to pass through. The wavelength conversion unit is arranged on the transmission path of the part of the illumination beam reflected by at least one filter unit to convert the part of the illumination beam reflected by the at least one filter unit into a conversion beam. The wavelength conversion unit is arranged on the reflection unit, and the reflection unit reflects the conversion beam to the at least one filter unit.

Description

Lighting system and projection device

technical field

The invention relates to an illumination system and a projection device.

Background technique

With the advancement of display technology, there are currently a variety of display devices available for users to choose from, such as liquid crystal displays, plasma displays, organic light emitting diode displays, cathode ray tubes and projection devices. Since the projection device can produce a larger picture with a smaller volume, it has an irreplaceable position in some uses, such as conference room briefings for many people, home theater, teaching or research in the classroom. Briefing etc.

The light valves used in current projection devices can be roughly classified into two categories, namely digital micro-mirror devices and liquid-crystal-on-silicon panels (LCOS panels). Projection devices using digital micromirror elements use color sequential methods to display full-color images. In such a projection device, the illuminating beam emitted by a white light bulb (such as a high-pressure mercury lamp) passes through ultraviolet and infrared filters to filter out visible light (wavelength is about 380nm to 780nm), and then passes through the color wheel (color wheel) ) to filter out different colors. Then, after being homogenized by a light integration rod, the illuminating beam converges on the DMD through a lens. Then, through the switch of the digital micromirror element, the color matching the image is reflected to the screen for imaging. The luminous efficiency of the whole optical system is about 25%. For example, a 180 watt bulb can emit 8600 lumens, but only 2150 lumens are left when put into the projection system. One of the components with the worst light efficiency is the color wheel. This is because the color wheel uses sequential display and reflects light of unnecessary colors. For example, when the red filter of the color wheel cuts into the light path, the red light passes through the red filter, but the green and blue light are reflected back to the high-pressure mercury lamp and become heat sources, resulting in loss of light energy.

Contents of the invention

The present invention provides a lighting system with high light efficiency.

The invention provides a projection device with high light efficiency.

An embodiment of the present invention provides an illumination system, including a light source, a filter module, a wavelength conversion unit, and a reflection unit. The light source is used to emit the illumination beam, and the filter module is arranged on the transmission path of the illumination beam. The filter module includes a plurality of filter units with different colors, and these filter units cut into the transmission path of the illumination light beam in turn. Each filter unit reflects a part of the illuminating beam and allows another part of the illuminating beam to pass through. The wavelength conversion unit is arranged on the transmission path of the partial illumination beam reflected by the at least one filter unit, so as to convert the partial illumination beam reflected by the at least one filter unit into a conversion beam. The wavelength converting unit is arranged on the reflecting unit, and the reflecting unit reflects the converted beam to the at least one filter unit, and at least part of the converted beam passes through the at least one filter unit.

Another embodiment of the present invention provides a projection device, including the above illumination system, a light valve, and a projection lens. The light valve is arranged on the transmission path of the other part of the illuminating light beam and at least part of the converted light beam passing through the at least one filter unit, so as to convert the other part of the illuminating beam and at least part of the converted light beam penetrating the at least one filter unit into image beam. The projection lens is arranged on the transmission path of the image light beam.

Since the lighting system and the projection device of the embodiment of the present invention use the wavelength conversion unit to convert the light reflected by the filter unit, and use the reflection unit to reflect the converted light beam converted by the filter unit back to the filter unit, so the present invention The lighting system and projection device of the embodiment can achieve the effect of recycling the light that cannot pass through the reflection unit, so it has high light efficiency.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1A is a schematic diagram of a projection device according to an embodiment of the present invention.

FIG. 1B is a schematic cross-sectional view of the wavelength conversion unit and the reflection unit in FIG. 1A .

FIG. 2 is a partial schematic diagram of the lighting system in FIG. 1A .

3 and 4 show two other variations of the lighting system of FIG. 1A.

Fig. 5 is a schematic diagram of an illumination system according to another embodiment of the present invention.

FIG. 6A is a schematic diagram of a lighting system according to another embodiment of the present invention.

6B shows a side view of the filter unit, multi-layer optical coating layer and light homogenizing element of the illumination system of FIG. 6A.

Fig. 7 is a schematic diagram of an illumination system according to another embodiment of the present invention.

Reference signs:

100: projection device

110: light valve

112: image beam

120: projection lens

200, 200d, 200e, 200f: lighting system

210: light source

212: Lighting Beam

213: another part of the lighting beam

214a, 214b, 214c: partial illumination beams

216a, 216b, 216c: converted light beams

220: Filter module

222, 224, 226: filter unit

230: Light homogenizing element

240: lens

250, 250f: reflection unit

260a, 260b, 260c, 260d: wavelength conversion unit

270: Multi-layer optical coating layer

272: Surface

detailed description

1A is a schematic diagram of a projection device according to an embodiment of the present invention, FIG. 1B is a schematic cross-sectional view of a wavelength conversion unit and a reflection unit in FIG. 1A , and FIG. 2 is a partial schematic diagram of an illumination system in FIG. 1A . Referring to FIG. 1A , FIG. 1B and FIG. 2 , the projection device 100 of this embodiment includes an illumination system 200 , a light valve 110 and a projection lens 120 . The lighting system 200 includes a light source 210 , a filter module 220 , a wavelength converting unit 260 a and a reflecting unit 250 . The light source 210 is used for emitting an illumination beam 212 . In this embodiment, the light source 210 is a high-pressure mercury lamp, and the illuminating beam 212 is a white beam. Specifically, the illumination light beam 212 may include a first color light beam, a second color light beam, a third color light beam and a fourth color light beam with wavelengths from large to small, wherein the first color light beam, the second color light beam, the third color light beam and the fourth color light beams are, for example, red light beams, green light beams, blue light beams and ultraviolet light beams respectively, but the invention is not limited thereto. However, in other embodiments, the light source 210 can also be a light emitting diode or other suitable light emitting elements.

The filter module 220 is disposed on the transmission path of the illumination beam 212 . The filter module 220 includes a plurality of filter units (such as filter units 222 , 224 and 226 ) with different colors. These filter units 222 , 224 and 226 cut into the transmission path of the illumination beam 212 in turn. In this embodiment, the filter module 220 is, for example, a color wheel, and the filter units 222 , 224 , 226 are, for example, filters on the color wheel. In this embodiment, the colors of the filter units include a first color, a second color and a third color. For example, in this embodiment, the filter units 222, 224 and 226 are respectively the first color filter unit, the second color filter unit and the third color filter unit, that is, for example, the red filter unit , a green filter unit and a blue filter unit, but the present invention is not limited thereto. In other embodiments, the first color, the second color and the third color may also be other three different colors.

Each filter unit 222 , 224 , 226 reflects a part of the illuminating beam 212 and allows another part of the illuminating beam 212 to pass through. For example, when the first color filter unit 222 cuts into the transmission path of the illumination beam 212, the filter unit 222 reflects a part of the illumination beam 214a, and allows another part of the illumination beam 213 to pass through, and the penetrating part illuminates The color of the light beam 213 changes to the first color (ie red).

The wavelength conversion unit 260a is arranged on the transmission path of the partial illumination beam 212 reflected by at least one filter unit (such as the filter unit 222), so as to convert the partial illumination beam 214a reflected by the at least one filter unit 222 into a conversion beam 216a, wherein the converted light beam 216a has a wavelength greater than the wavelength of the part of the illuminating light beam 214a reflected by the at least one filter unit 222 . Specifically, the filter unit 222 is suitable for reflecting light of a color other than the first color (such as red), and the colors of the part of the illumination light beam 214a reflected by it include the second color (green), the third color (blue) and the second color (blue) Four colors (ultraviolet). In addition, in this embodiment, the wavelength conversion unit 260a is a fluorescent layer, and the fluorescent layer may include a single color phosphor, such as a first color phosphor (red phosphor). Therefore, when the green light, blue light, and ultraviolet light irradiate the wavelength conversion unit 260a, the converted light beam 216a of the first color (red) will be excited.

The wavelength conversion unit 260a is disposed on the reflection unit 250 , the reflection unit 250 reflects the converted light beam 216a to the at least one filter unit 222 , and at least part of the converted light beam 216a passes through the at least one filter unit 222 . In this embodiment, since the converted light beam 216a is red, it can pass through the red filter unit 222 . In addition, in this embodiment, the reflective unit 250 is a concave mirror, so as to converge the converted light beam 216 a on the at least one filter unit 222 .

The light valve 110 is arranged on the transmission path of the other part of the illuminating light beam 213 and at least part of the converted light beam 216a passing through the at least one filter unit 222, so that the other part of the illuminating light beam 213 passing through the at least one filter unit 222 And at least part of the converted beam 216a is converted into the image beam 112 . In addition, the filter units 224 and 226 allow another part of the illumination light beam 213 to pass through, and the color of the another part of the illumination beam after passing through the filter units 224 and 226 becomes the second color (green) and the third color respectively. (blue). In this way, the light valve 110 can convert the red light beam, the green light beam and the blue light beam into a full-color image light beam 112 . In this embodiment, the light valve 110 is, for example, a digital micro-mirror device (DMD). However, in other embodiments, the light valve 110 may also be a liquid-crystal-on-silicon panel, a transmissive liquid crystal panel or other suitable spatial light modulators (SLM).

The projection lens 120 is disposed on the transmission path of the image beam 112 to project the image beam 112 on the screen. In this way, an image picture can be formed on the screen.

In this embodiment, the optical axis of the light source 210 is inclined relative to these filter units 222 , 224 , 226 , and the optical axis of the reflection unit 250 is inclined relative to these filter units 222 , 224 , 226 . In this way, part of the illuminating light beam 214 a reflected by the filter unit 222 can pass to the wavelength conversion unit 260 a without returning to the light source 210 . In one embodiment, the inclination direction of the optical axis of the light source 210 may be opposite to the inclination direction of the optical axis of the reflection unit 250 , so as to increase the proportion of part of the illumination beam 214 a passing through the wavelength conversion unit 260 a.

Since the lighting system 200 and the projection device 100 of this embodiment use the wavelength conversion unit 260a to convert the light reflected by the filter unit 222, and use the reflection unit 250 to reflect the converted light beam 216a converted by the filter unit 222 back to the filter unit 222. Therefore, the lighting system 200 and the projection device 100 of this embodiment can achieve the effect of recycling the light that cannot pass through the reflection unit 250, so it has high light efficiency. In addition, in this embodiment, since the converted light beam 216 a is red and can pass through the red filter unit 222 , this embodiment can increase the intensity of the red part of the light provided by the lighting system 200 . Since the intensity of the red part in the emission spectrum of the high-pressure mercury lamp is weak, this embodiment can improve the color rendering index of the image frame of the projection device 100 by increasing the intensity of the red part.

In this embodiment, the lighting system 200 further includes a light homogenizing element 230 and at least one lens 240 (a plurality of lenses 240 are taken as an example in FIG. 1A ). The light homogenizing element 230 homogenizes another part of the illuminating light beam 213 and the converted light beam 216 a from the filter module 220 , and the lens 240 converges another part of the illuminating light beam 213 and the converted light beam 216 a from the light homogenizing element 230 on the light valve 110 superior. In this embodiment, the light homogenizing element 230 is, for example, a light integration rod. However, in other embodiments, the light homogenizing element 230 can also be a lens array or other suitable light homogenizing elements.

In other embodiments, the wavelength conversion unit 260a can also be replaced by a wavelength conversion unit 260b with a second color (green) phosphor (as shown in FIG. 3 ) or a wavelength conversion unit with a third color (blue) phosphor. 260c (as shown in Figure 4). In the embodiment of FIG. 3 , the part of the illuminating light beam 214b reflected by the filter unit 224 includes a blue light beam and an ultraviolet light beam, so when the part of the illuminating light beam 214b is irradiated on the wavelength conversion unit 260b, it can excite a second color ( Green) converted light beam 216b, and the green converted light beam 216b can pass through the green filter unit 224, and then pass to the light valve 110 (as shown in FIG. 1A ). In this way, the embodiment of FIG. 3 can increase the intensity of the green part of the light provided by the lighting system. Since human eyes perceive brightness mainly from the intensity of green light, increasing the intensity of the green part of the light provided by the lighting system can increase the brightness of the lighting system, thereby increasing the brightness of the image screen provided by the projection device.

In the embodiment of FIG. 4 , the part of the illuminating beam 214c reflected by the filter unit 226 includes an ultraviolet beam, so when the part of the illuminating beam 214c is irradiated on the wavelength conversion unit 260c, it can excite the third color (blue) The converted light beam 216c, and the blue converted light beam 216c can pass through the blue filter unit 226, and then pass to the light valve 110 (as shown in FIG. 1A ). In this way, the embodiment of FIG. 4 can increase the intensity of the blue part of the light provided by the lighting system.

Fig. 5 is a schematic diagram of an illumination system according to another embodiment of the present invention. Please refer to FIG. 5 , the lighting system 200d of this embodiment is similar to the lighting system 200 of FIG. 1A , and the differences between the two are as follows. In the lighting system 200d of this embodiment, the wavelength conversion unit 260d includes phosphors of a first color (such as red), phosphors of a second color (such as green) and phosphors of a third color (such as blue). When the filter unit 222 of the filter module 220 cuts into the transmission path of the illumination beam 212, the part of the illumination beam 214a reflected by the filter unit 222 includes the second color (green) beam, the third color (blue) beam and The fourth color (ultraviolet) light beams, and these light beams will excite the first color (red) phosphor to cause the first color phosphor to emit a converted light beam 216a in the first color, and the converted light beam 216a in the first color will The light passes through the filter unit 222 of the first color and is delivered to the light valve 110 . On the other hand, when the filter unit 224 of the filter module 220 cuts into the transmission path of the illumination beam 212, the part of the illumination beam reflected by the filter unit 222 includes the third color (blue) light beam and the fourth color (ultraviolet) beam. color) light beams, and these light beams will excite the second color (green) phosphor and cause the second color phosphor to emit a converted light beam 216b in the second color, and the converted light beam 216b in the second color will pass through the second color phosphor The colored filter unit 224 is transmitted to the light valve 110 . Furthermore, when the filter unit 226 of the filter module 220 cuts into the transmission path of the illumination beam 212, the part of the illumination beam reflected by the filter unit 226 includes the fourth color (ultraviolet) beam, and the fourth color beam will be Exciting the third-color (blue) phosphor causes the third-color phosphor to emit a converted light beam 216c in the third color, and the converted light beam 216c in the third color will pass through the filter unit 226 in the third color to passed to the light valve 110.

In this way, the lighting system 200d of this embodiment can recycle and reuse the light reflected by the filter units 222, 224 and 226 of each color, so that the lighting system 200d and the projection device can be further improved. efficiency.

FIG. 6A is a schematic diagram of an illumination system according to yet another embodiment of the present invention, and FIG. 6B shows a side view of a filter unit, a multi-layer optical coating layer and a light homogenizing element of the illumination system in FIG. 6A . Please refer to FIG. 6A and FIG. 6B , the lighting system 200 e of this embodiment is similar to the lighting system 200 d of FIG. 5 , and the differences between the two are as follows. In the lighting system 200e of this embodiment, the filter module 220e further includes a multi-layer optical coating 270, which is disposed on the filter units 222, 224 and 226, and is located in the wavelength conversion unit 260d and these filter units 222, 224, and 226, so that part of the converted light beams 216a, 216b, 216c from the wavelength conversion unit 260d and the part of the illumination beam 212 reflected by the filter unit that is not converted by the wavelength conversion unit are reflected. back to the wavelength conversion unit 260d. Specifically, when the filter unit 226 cuts into the transmission path of the illuminating beam 212, it will reflect part of the illuminating beam 212 to the wavelength conversion unit 260d, and at this time, the part of the illuminating beam 212 includes the fourth color beam (such as ultraviolet beam). The fourth color light beam (ultraviolet light beam) excites the third color (blue) phosphor in the wavelength conversion unit 260d, so that the third color phosphor emits a blue converted light beam 216c and transmits it to the filter unit 226. In addition, the fourth color light beam that has not been converted by the third color phosphor is reflected by the reflection unit 250 toward the filter unit 226 , and then reflected back to the wavelength conversion unit 260 d by the multi-layer optical coating layer 270 . In this way, the unconverted fourth-color light beam has the next opportunity to excite the third-color phosphor, so as to achieve the effect of reuse. In addition, if part of the fourth color light beam that is delivered to the wavelength conversion unit 260d for the second time has not been converted by the wavelength conversion unit 260d, it can still be reflected back to the wavelength conversion unit 260d by the multilayer optical coating layer 270 again, and it is expected to achieve the following one conversion. Such a way of repeatedly reflecting the light to repeatedly excite the wavelength conversion unit 260d may be called recursive emission. The light beams of different colors described below that are not converted by the wavelength conversion unit can be repeatedly reflected by the multilayer optical coating layer 270 to achieve recursive emission, so the following takes one conversion as an example to illustrate, and the part of repeated conversion is omitted .

When the filter unit 224 cuts into the transmission path of the illuminating beam 212, it will reflect part of the illuminating beam 212 to the wavelength conversion unit 260d. At this time, the part of the illuminating beam 212 includes a fourth color beam (such as an ultraviolet beam) and a third color beam (such as blue beam). The fourth color light beam (ultraviolet light beam) excites the third color (blue) phosphor and the second color (green) phosphor in the wavelength conversion unit 260d, and the third color (blue) light beam excites the second color ( Green) phosphor, so that the third color phosphor and the second color phosphor respectively emit a converted light beam 216c in a third color (blue) and a converted light beam 216b in a second color (green) to be delivered to the filter unit 226. The converted light beam 216b will pass through the filter unit 224, while the converted light beam 216c will be reflected back to the wavelength conversion unit 260d by the multi-layer optical coating layer 270, and excite the second color phosphor so that the second color phosphorescent filter emits a second color light beam . The light beam of the second color is reflected by the reflection unit 250 to the filter unit 224 and passes through the filter unit 224 .

When the filter unit 222 cuts into the transmission path of the illuminating light beam 212, it will reflect part of the illuminating light beam 212 to the wavelength conversion unit 260d. blue beam) and a second color beam (such as green beam). The fourth color light beam (ultraviolet light beam) will excite the third color (blue) phosphor, the second color (green) phosphor and the first color (red) phosphor in the wavelength conversion unit 260d, and the third color light beam (blue) color light beam) will excite the second color (green) phosphor and the first color (red) phosphor in the wavelength conversion unit 260d, and the second color light beam (such as green light beam) will excite the first color light beam in the wavelength conversion unit 260d (red) phosphor, so that the third color phosphor, the second color phosphor and the first color phosphor respectively emit a converted light beam 216c of the third color (blue) and a converted light beam of the second color (green) 216b and the converted light beam 216a of the first color (red) are transmitted to the filter unit 222 . The converted light beam 216a passes through the filter unit 224, and the converted light beams 216b and 216c are reflected by the multi-layer optical coating layer 270 back to the wavelength conversion unit 260d. The converted light beam 216c (blue light beam) reflected back to the wavelength conversion unit 260d excites the second color (green) phosphor and the first color (red) phosphor, and the converted light beam 216b (green light beam) reflected back to the wavelength conversion unit 260d The phosphor of the first color (red) is excited, so that the phosphor of the second color and the phosphor of the first color emit the light beam of the second color and the light beam of the first color respectively. The first color light beam passes through the filter unit 222 to the light valve 110 , and the second color light beam is reflected by the multi-layer optical coating layer 270 back to the wavelength conversion unit 260d. The second-color light beam reflected back to the wavelength conversion unit 260d excites the first-color phosphor so that the first-color phosphor emits the first-color light beam. The light beam of the first color passes through the filter unit 222 and is delivered to the light valve 110 .

Through the above method of recursive emission with repeated excitation, the illumination light beam 212 emitted by the light source 210 can be more fully utilized, and the light efficiency of the illumination system 200e and the projection device can be further improved.

The multilayer optical coating layer 270 may include a prism array layer having a surface 272 facing the wavelength conversion unit 260d such that a portion of the converted beam from the wavelength conversion unit 260d and a portion of the illumination beam not converted by the wavelength conversion unit 260d 212 is reflected toward the wavelength conversion unit 260d. In one embodiment, the multilayer optical coating layer 270 may further include a dichroic layer.

Fig. 7 is a schematic diagram of an illumination system according to another embodiment of the present invention. The lighting system 200f of this embodiment is similar to the lighting system 200 of FIG. 1A , and the differences between the two are as follows. In the lighting system 200f of the present embodiment, the reflecting unit 250f is a reflecting sleeve disposed between the light source 210 and the filter module 220, and the illuminating light beam 212 is transmitted in the reflecting sleeve. In addition, the wavelength conversion unit 260a is disposed on the inner wall of the reflective sleeve. In this embodiment, the reflective sleeve is disposed around the optical axis of the light source 210 , so that part of the illumination light beam 214 a reflected by the wavelength conversion unit 260 a can be converted into a converted light beam 216 a to achieve the effect of recycling.

This embodiment takes the wavelength conversion unit 260a as an example. In other embodiments, the above-mentioned wavelength conversion units 260b, 260c, and 260d or other suitable wavelength conversion units can also be used to replace the wavelength conversion unit 260a of this embodiment.

To sum up, since the lighting system and the projection device of the embodiment of the present invention use the wavelength conversion unit to convert the light reflected by the filter unit, and use the reflection unit to reflect the converted light beam converted by the filter unit back to the filter unit Therefore, the lighting system and projection device of the embodiments of the present invention can achieve the effect of recycling the light that cannot pass through the reflection unit, so it has high light efficiency.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention, and any person of ordinary skill in the art may make some changes and modifications without departing from the spirit and scope of the present invention.

Claims (12)

1. a kind of illuminator, it is characterised in that including：

Light source, to send illuminating bundle, wherein the illuminating bundle is white light beam, the illuminating bundle includes wavelength by big To the first small color beam, the second color beam, tri-color beam and the 4th color beam；

On optical filtering module, the bang path for being configured at the illuminating bundle, the optical filtering module is colour wheel, and the optical filtering module Including the different filter unit of multiple colors, the filter unit cuts the bang path of the illuminating bundle in turn, wherein often Filter unit described in one reflects the part illuminating bundle, and allows illuminating bundle described in another part to penetrate, the multiple face The different filter unit of color includes the first color filter unit, the second color filter unit and the 3rd color filter unit；

Wavelength conversion unit, is configured at the bang path for the partial illumination light beam that filter unit at least described in one is reflected On, the partial illumination light beam that an at least filter unit is reflected is converted into commutating optical beam, the commutating optical beam Wavelength be more than the wavelength of the partial illumination light beam that an at least filter unit is reflected, when the first color filter unit is cut When entering the bang path of the illuminating bundle, the first color filter unit allows first color beam to penetrate, and by described Dichroscope beam, the tri-color beam and the 4th color beam reflex to the wavelength conversion unit, when second color filter When light unit cuts the bang path of the illuminating bundle, the second color filter unit allows second color beam to penetrate, and The part illuminating bundle that the second color filter unit is reflected includes the tri-color beam and the 4th color beam, And the tri-color beam and the 4th color beam are reflexed to the wavelength conversion unit by the second color filter unit, when When the 3rd color filter unit cuts the bang path of the illuminating bundle, the 3rd color filter unit allows the 3rd color Light beam is penetrated, and the part illuminating bundle that the 3rd color filter unit is reflected includes the 4th color beam, and institute State the 3rd color filter unit and the 4th color beam is reflexed into wavelength conversion unit, wherein the wavelength conversion unit is used to incite somebody to action First is converted into by second color beam, the tri-color beam and the 4th color beam that the optical filtering module is reflected Color commutating optical beam, or for the tri-color beam and the 4th color beam that are reflected by the optical filtering module to be converted into Second color commutating optical beam, or for the 3rd color conversion light will to be converted into by the 4th color beam that the optical filtering module is reflected Beam；And

Reflector element, wherein the wavelength conversion unit is configured on the reflector element, the reflector element is by the conversion Light beam reflexes to an at least filter unit, and at least partly described commutating optical beam penetrates an at least filter unit, and The wavelength conversion unit is covered in the reflector element to reflect on the surface of the commutating optical beam, and the reflector element is Concave mirror, the commutating optical beam is converged on an at least filter unit.

2. illuminator according to claim 1, it is characterised in that the wavelength conversion unit is fluorescence coating.

3. illuminator according to claim 2, it is characterised in that the fluorescence coating includes solid color phosphor.

4. illuminator according to claim 2, it is characterised in that the fluorescence coating includes the first color phosphor, the second color Phosphor and the 3rd color phosphor.

5. illuminator according to claim 4, it is characterised in that the optical filtering module also includes multilayer optical coating layer, It is configured on the filter unit, and positioned between the wavelength conversion unit and the filter unit, so that part comes from institute The filter unit institute for stating the part commutating optical beam of wavelength conversion unit and not changed by the wavelength conversion unit is anti- The partial illumination light beam penetrated is reflected back the wavelength conversion unit.

6. illuminator according to claim 1, it is characterised in that the optical axis of the light source is relative to the filter unit Tilt, and the optical axis of the reflector element is tilted relative to the filter unit.

7. a kind of projection arrangement, it is characterised in that including：

Illuminator, including：

Light source, to send illuminating bundle, wherein the illuminating bundle is white light beam, the illuminating bundle includes wavelength by big To the first small color beam, the second color beam, tri-color beam and the 4th color beam；

On optical filtering module, the bang path for being configured at the illuminating bundle, the optical filtering module is colour wheel, and the optical filtering module Including the different filter unit of multiple colors, the filter unit cuts the bang path of the illuminating bundle in turn, wherein often Filter unit described in one reflects the part illuminating bundle, and allows illuminating bundle described in another part to penetrate, the multiple face The different filter unit of color includes the first color filter unit, the second color filter unit and the 3rd color filter unit；

Wavelength conversion unit, is configured at the bang path for the partial illumination light beam that filter unit at least described in one is reflected On, the partial illumination light beam that an at least filter unit is reflected is converted into commutating optical beam, the commutating optical beam Wavelength be more than the wavelength of the partial illumination light beam that an at least filter unit is reflected, when the first color filter unit is cut When entering the bang path of the illuminating bundle, the first color filter unit allows first color beam to penetrate, and by described Dichroscope beam, the tri-color beam and the 4th color beam reflex to the wavelength conversion unit, when second color filter When light unit cuts the bang path of the illuminating bundle, the second color filter unit allows second color beam to penetrate, and The part illuminating bundle that the second color filter unit is reflected includes the tri-color beam and the 4th color beam, And the tri-color beam and the 4th color beam are reflexed to the wavelength conversion unit by the second color filter unit, when When the 3rd color filter unit cuts the bang path of the illuminating bundle, the 3rd color filter unit allows the 3rd color Light beam is penetrated, and the part illuminating bundle that the 3rd color filter unit is reflected includes the 4th color beam, and institute State the 3rd color filter unit and the 4th color beam is reflexed into wavelength conversion unit, wherein the wavelength conversion unit is used to incite somebody to action First is converted into by second color beam, the tri-color beam and the 4th color beam that the optical filtering module is reflected Color commutating optical beam, or for the tri-color beam and the 4th color beam that are reflected by the optical filtering module to be converted into Second color commutating optical beam, or for the 3rd color conversion light will to be converted into by the 4th color beam that the optical filtering module is reflected Beam；And

Reflector element, wherein the wavelength conversion unit is configured on the reflector element, the reflector element is by the conversion Light beam reflexes to an at least filter unit, and at least partly described commutating optical beam penetrates an at least filter unit, and The wavelength conversion unit is covered in the reflector element to reflect on the surface of the commutating optical beam, and the reflector element is Concave mirror, the commutating optical beam is converged on an at least filter unit；

Light valve, is configured at another part illuminating bundle for penetrating an at least filter unit and the conversion of described at least part On the bang path of light beam, by another part illuminating bundle for penetrating an at least filter unit and at least portion Commutating optical beam is divided to be converted into image strip；And

On projection lens, the bang path for being configured at the image strip.

8. projection arrangement according to claim 7, it is characterised in that the wavelength conversion unit is fluorescence coating.

9. projection arrangement according to claim 8, it is characterised in that the fluorescence coating includes solid color phosphor.

10. projection arrangement according to claim 8, it is characterised in that the fluorescence coating includes the first color phosphor, second Color phosphor and the 3rd color phosphor.

11. projection arrangement according to claim 10, it is characterised in that the optical filtering module also includes multilayer optical and is coated with Layer, is configured on the filter unit, and positioned between the wavelength conversion unit and the filter unit, so that part comes from The part commutating optical beam of the wavelength conversion unit and the filter unit institute not changed by the wavelength conversion unit The partial illumination light beam of reflection is reflected back the wavelength conversion unit.

12. projection arrangement according to claim 7, it is characterised in that the optical axis of the light source is relative to the filter unit Tilt, and the optical axis of the reflector element is tilted relative to the filter unit.