WO2019200932A1

WO2019200932A1 - Light source system, projection device, and color wheel

Info

Publication number: WO2019200932A1
Application number: PCT/CN2018/118816
Authority: WO
Inventors: 徐梦梦; 胡飞; 郭祖强; 李屹
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2018-04-19
Filing date: 2018-12-03
Publication date: 2019-10-24
Also published as: CN110389489A; CN110389489B; CN113934096A; CN113934096B

Abstract

Provided are a light source system (20, 50), a projection device (30, 60), and a color wheel (10, 40, 70). The light source system (20, 50) comprises the color wheel (10, 40, 70), an excitation light source (11), and a supplementary light source (19); said color wheel (10, 40, 70) comprises a scattering region (101, 401, 701) and a wavelength conversion region (102); said scattering region (101, 401, 701) and said wavelength conversion region (102) are ring-shaped, and the scattering region (101, 401, 701) is sleeved on the outer side of the wavelength conversion region (102) or is sleeved on the inner side of the wavelength conversion region (102); said excitation light source (11) is used for emitting light to the scattering region (101, 401, 701) and the wavelength conversion region (102); the scattering region (101, 401, 701) is used for scattering, then emitting, the received light of the excitation light source (11); the wavelength conversion region (102) is used for converting the wavelength of the light of the excitation light source (11) and thereby emitting excited light; said supplementary light source (19) is used for emitting supplementary light so as to expand the color gamut of the light source system (20, 50).

Description

Light source system, projection equipment and color wheel

Technical field

The invention relates to a light source system, a projection device and a color wheel.

Background technique

At present, the commonly used light sources for projection equipment are white light UHP bulbs, LEDs, laser phosphor sources and RGB laser sources. UHP bulbs have problems with short life, poor monochromaticity, and low light utilization. Although the LED light source has a long life and good monochromaticity, the LED generally has a current saturation phenomenon, that is, the luminous efficiency decreases significantly as the driving current increases; at the same time, the optical expansion of the LED light is large, so that the spatial light modulator is After the size is fixed, the number of LEDs that can be accommodated is limited. These two factors cause the output brightness of the projection device of the LED light source to be low.

There is a method for a semiconductor laser to excite a wavelength conversion material on a color wheel to form light of different primary colors. The method has the advantages of high light efficiency and small optical expansion, and thus develops rapidly, and is an ideal choice for a projector light source. The light source system of the scheme can adopt two schemes of timing combining and spatial combining. In the time series merging scheme, the blue laser is used to excite the segmented color wheel to generate the temporal red, green and blue light, which constitutes the three primary colors required by the projection device. The blue light is obtained by eliminating the coherence of the laser part by the scattering powder, and the green light is obtained by The blue light is excited by the green phosphor, and the red light is excited by the blue light to excite the orange phosphor or the yellow phosphor is excited, and the corresponding filter is used to filter out the short wavelength portion. In the spatial combination scheme, a yellow laser is used to excite a yellow fluorescent pink wheel, and the color wheel converts a part of the light in the blue laser into yellow light and another part of the unconverted blue light to obtain white light, which is split into RGB after being separated by the filter. Three primary colors of light are incident on three spatial light modulators. In these two schemes, the fluorescence spectrum obtained by the blue laser-excited phosphor is wide, which results in a narrow color gamut of the projection device using laser fluorescence as a light source. Generally, the projection device using this technology can cover the complete sRGB color gamut. Some enhancements, such as the addition of a narrowband optical filter to remove the yellow light spectrum in green and red light, enhance its color gamut to the DCI-P3 color gamut. However, narrow-band filtering loses considerable brightness, which greatly reduces the efficiency of the system. Pure RGB laser projection equipment, because RGB laser has a very good monochromaticity, so has a very wide color gamut range, the projection device using RGB laser can easily reach the color gamut standard of REC 2020. However, the most obvious coloring temperature of RGB laser projection equipment is that there will be serious speckle problems. Although there are many inventions to solve the problem of laser speckle, it is not ideal, or it needs extra equipment to shake the projection screen. At the same time, RGB laser The cost of the projection device is high.

Further, there are two kinds of structures of the color wheel in which the above-mentioned laser fluorescence is used as a light source, as shown in FIG. Figure 1 (a) is an RGB three-segment color wheel for time series combining, in which the R segment is a wavelength converting material that absorbs blue laser light and is converted into red light, and the G segment is an absorbable blue laser light and is converted into red. The wavelength conversion material of light, the B segment is a scattering particle, and the blue laser can be scattered. To enhance the color gamut, narrow band filters can be added to the optical paths of the R and G segments. Fig. 1(b) is a monochrome color wheel for spatial merging, the wavelength converting material of the color wheel can absorb part of the blue light to be converted into yellow light, and the yellow light is mixed with the unconverted blue light to obtain white light.

Furthermore, in a solution of a currently existing laser and fluorescent hybrid light source as a projection light source, after adding fluorescence, the color wheel structure is not designed for the fluorescent system, but multiple beams of different colors are directly combined and incident. To the fluorescent wheel, the laser source is converted by the scattering effect of the phosphor. Specifically, after the blue laser and the red laser are combined, the orange fluorescent pink segment is opened, and the blue phosphor excites the orange phosphor to produce orange fluorescence, and the red laser is incident on the orange phosphor, and the phosphor is not excited but scattered. Finally, the orange fluorescence and the red laser are combined on the optical expansion amount, and are emitted from the color wheel to the collecting lens for collection. In this scheme, the red-blue laser is simultaneously incident on the same position of the fluorescent wheel, which increases the thermal load of the fluorescent wheel.

In another conventional laser and fluorescent hybrid light source as a projection light source, a hybrid light source of laser and fluorescence is realized by increasing the number of color wheel segments. Specifically, the color corresponding to the blue laser, the red laser, and the green laser in the solution The wheel portion is a mirror or a transmission mirror to which a diffusion sheet is added, and its structure is as shown in FIG. This scheme can avoid the problem that most lasers appearing in the former scheme are incident on the same position of the fluorescent wheel to increase the thermal load of the fluorescent wheel. However, since the number of color wheel segments is increased, the area occupied by the wavelength converting material becomes smaller, and the laser is incident on the laser. After the wavelength conversion material, the duty ratio of the wavelength conversion material is larger, and the heat load is increased, which is necessary to be improved.

Summary of the invention

In view of the above, it is necessary to provide a light source system that can improve the color wheel thermal effect, a projection apparatus using the above light source system, and a color wheel.

A light source system includes a color wheel, an excitation light source, and a complementary light source, the color wheel includes a scattering region and a wavelength conversion region, the scattering region and the wavelength conversion region are both annular, and the scattering region ring is disposed on the An inner side or an outer side of the wavelength conversion region; the excitation light source is configured to emit light to the scattering region and/or the wavelength conversion region, and the scattering region is configured to scatter the received light of the excitation light source, and The wavelength conversion region is configured to wavelength convert the received light of the excitation source to emit a laser light, the supplemental light source for emitting supplemental light to expand a color gamut of the light source system.

A projection apparatus comprising a light source system and a light modulation device, the light modulation device configured to modulate light emitted by the light source system to generate image light according to image data, the light source system comprising a color wheel, an excitation light source and a supplementary light source, The color wheel includes a scattering region and a wavelength conversion region, the scattering region and the wavelength conversion region are both annular, and the scattering region is disposed inside or outside the wavelength conversion region; the excitation light source is used for Illuminating to the scattering region and/or the wavelength conversion region, the scattering region for emitting light of the received excitation light source, the wavelength conversion region for receiving the excitation The light of the source is wavelength converted to emit a laser that is used to emit supplemental light to expand the color gamut of the source system.

A projection apparatus comprising a light source system and a light modulation device, the light modulation device configured to modulate light emitted by the light source system to generate image light according to image data, the light source system comprising a color wheel, an excitation light source and a supplementary light source, The color wheel includes a scattering region and a wavelength conversion region, the scattering region and the wavelength conversion region are both annular, and the scattering region is disposed inside or outside the wavelength conversion region; the excitation light source is used for Illuminating to the scattering region and/or the wavelength conversion region, the scattering region for emitting light of the received excitation light source, the wavelength conversion region for receiving the excitation The light of the light source is wavelength converted to emit a laser light, the supplemental light source is for emitting complementary light to expand a color gamut of the light source system, and the light of the excitation light source received by the scattering region is a first color light. The number of wavelength conversion regions is at least two, and the at least two wavelength conversion regions include a first conversion region and a second conversion region, the number of the scattering regions being at least one, the at least one a scattering region is disposed between the first conversion region and the second conversion region, the laser receiving light includes a second color light and a third color light, and the first conversion region is provided with a first wavelength conversion material for Receiving, the light of the excitation light source is converted into a second color light, and the second conversion region is provided with a second wavelength conversion material for converting the received light of the excitation light source into a third color light, The supplemental light includes a second color supplemental light and/or a third color supplemental light, the light emitted by the excitation light source forming a first spot in the scattering region, the supplemental light comprising a second color supplemental light and a third color supplemental light The second color supplemental light forms a second spot on the scattering region, the third color supplemental light forming a third spot on the scattering region, the second spot being compared to the third spot Adjacent to the first transition zone, the third spot is adjacent to the second switch zone, and the first spot is located between the second spot and the third spot. The light source system further includes a first light homogenizing element, a light homogenizing element for receiving a first color light emitted by the color wheel, and a second light homogenizing element for receiving the a second color light and a second color supplementing light, the third light homogenizing element is configured to receive the third color light and the third color complementary light emitted by the color wheel, and the light modulating device comprises a first spatial light modulator, a second spatial light modulator, and a third spatial light modulator, wherein the first spatial light modulator is configured to modulate light emitted by the first light homogenizing element to generate first image light, The two spatial light modulators are configured to modulate light emitted by the second light homogenizing element to generate second image light, and the third spatial light modulator is configured to modulate light emitted by the third light homogenizing element to generate third image light.

A projection apparatus comprising a light source system and a light modulation device, the light modulation device configured to modulate light emitted by the light source system to generate image light according to image data, the light source system comprising a color wheel, an excitation light source and a supplementary light source, The color wheel includes a scattering region and a wavelength conversion region, the scattering region and the wavelength conversion region are both annular, and the scattering region is disposed inside or outside the wavelength conversion region; the excitation light source is used for Illuminating to the scattering region and/or the wavelength conversion region, the scattering region for emitting light of the received excitation light source, the wavelength conversion region for receiving the excitation The light of the light source is wavelength converted to emit a laser light, the supplemental light source is for emitting complementary light to expand a color gamut of the light source system, and the light of the excitation light source received by the scattering region is a first color light. The number of wavelength conversion regions is at least two, and the at least two wavelength conversion regions include a first conversion region and a second conversion region, the number of the scattering regions being at least two, the at least two The scattering region includes a first scattering region and a second scattering region, wherein the first scattering region, the first conversion region, the second scattering region, and the second conversion region are sequentially disposed, and the laser light includes a second Color light and third color light, the first conversion region is provided with a first wavelength conversion material for converting the received light of the excitation light source into a second color light, and the second conversion region is provided with a second color The wavelength converting material is configured to convert the received light of the excitation light source into a third color light, the supplementary light comprising a second color supplemental light and/or a third color supplemental light, and the light emitted by the excitation light source is in the The first scattering region forms a first spot, the supplemental light includes a second color supplemental light and a third color supplemental light, and the second color supplemental light forms a second spot on the first scattering region, the first a three-color supplemental light forming a third spot on the second scattering region, the second spot being adjacent to the first conversion region compared to the first spot, the light source system further comprising a first light homogenizing element, Second uniform light element and third light homogenizing element The first light homogenizing element is configured to receive first color light emitted by the color wheel, and the second light homogenizing element is configured to receive the second color light and the second color supplement issued by the color wheel Light, the third light homogenizing element is configured to receive the third color light and the third color supplemental light emitted by the color wheel, and the light modulating device comprises a first spatial light modulator and a second spatial light a modulator and a third spatial light modulator, the first spatial light modulator for modulating light emitted by the first light homogenizing element to generate first image light, and the second spatial light modulator for modulating the second The light emitted by the light homogenizing element produces a second image light, and the third spatial light modulator is configured to modulate light emitted by the third light homogenizing element to produce a third image light.

A projection apparatus comprising a light source system and a light modulation device, the light modulation device configured to modulate light emitted by the light source system to generate image light according to image data, the light source system comprising a color wheel, an excitation light source and a supplementary light source, The color wheel includes a scattering region and a wavelength conversion region, the scattering region and the wavelength conversion region are both annular, and the scattering region is disposed inside or outside the wavelength conversion region; the excitation light source is used for Illuminating to the scattering region and/or the wavelength conversion region, the scattering region for emitting light of the received excitation light source, the wavelength conversion region for receiving the excitation The light of the light source is wavelength converted to emit a laser light, the supplemental light source is for emitting complementary light to expand a color gamut of the light source system, and the light of the excitation light source received by the scattering region is a first color light. The number of wavelength conversion regions is at least two, and the at least two wavelength conversion regions include a first conversion region and a second conversion region, the number of the scattering regions being at least one, the at least one a scattering region is disposed between the first conversion region and the second conversion region, the laser receiving light includes a second color light and a third color light, and the first conversion region is provided with a first wavelength conversion material for Receiving, the light of the excitation light source is converted into a second color light, and the second conversion region is provided with a second wavelength conversion material for converting the received light of the excitation light source into a third color light, The supplemental light includes a second color supplemental light and/or a third color supplemental light, the light emitted by the excitation light source forming a first spot in the scattering region, the supplemental light comprising a second color supplemental light and a third color supplemental light The second color supplemental light forms a second spot on the scattering region, the third color supplemental light forming a third spot on the scattering region, the second spot being compared to the third spot Adjacent to the first transition zone, the third spot is adjacent to the second spot, the first spot is coincident with the second spot, and the light source system further includes a first Dodging element and second uniformizing element, The first light homogenizing element is configured to receive the first color light, the second color light, and the second color complementary light emitted by the color wheel, and the second light homogenizing element is configured to receive the color wheel The third color light and the third color supplement light, the light modulation device includes a first spatial light modulator and a second spatial light modulator, wherein the first spatial light modulator is configured to modulate the first uniform The light emitted by the light element produces a first image light, and the second spatial light modulator is used to modulate light emitted by the second light homogenizing element to produce a second image light.

A color wheel includes a first area and a second area, the first area and the second area are both annular, the number of the second area is at least two, and the number of the first area is at least one The ring of the at least one first region is located between the rings of the at least two second regions, the first region is one of a scattering region and a wavelength conversion region, and the second region is a scattering region and a wavelength Another one of the conversion regions for emitting the scattered light for receiving the excitation light and wavelength-converting the excitation light to emit the laser light.

Compared with the prior art, the present invention provides a color wheel of a light source system that can be used for laser fluorescence, a light source system including the color wheel, and a projection device, wherein the color wheel adopts a circular and sleeved scattering region and In the wavelength conversion region, the wavelength conversion region can be excited to generate a reduced duty ratio of the laser light without increasing the color wheel size, and the color wheel thermal load is reduced. In addition, the wavelength conversion region can perform wavelength conversion to generate a laser, and the scattering region can scatter light emitted by the excitation light source to reduce speckle. Therefore, the color wheel, the light source system and the projection device of the present invention can be enhanced. While projecting the color gamut, minimize heat load and reduce speckle problems.

DRAWINGS

Figure 1 is a schematic view showing the structure of a color wheel of a two-laser fluorescent light source system.

2 is a schematic structural view of a multi-segment color wheel in a projection apparatus of another laser-fluorescent hybrid light source system.

Figure 3 is a schematic view showing the structure of the first embodiment of the color wheel of the present invention.

4 is a schematic structural view of a light source system having the color wheel shown in FIG. 3 and a projection apparatus thereof.

FIG. 5 is a schematic plan view showing the structure of the color wheel shown in FIG.

Figure 6 is a schematic view showing the structure of a second embodiment of the light source system and projection apparatus of the present invention.

Fig. 7 is a schematic plan view showing the structure of the color wheel shown in Fig. 6 in an operating state.

Fig. 8 is a plan view showing the structure of the color wheel in the working state according to the third embodiment of the present invention.

Main component symbol description

Light source system

20, 50

Color wheel

10, 40, 70

Projection equipment

30, 60

First area/

scattering area

101, 401, 701

Second region/wavelength conversion region 102

Structural member 103

First transition region

102a, 702a

Second transition region

102b, 702b

Excitation source 11

Supplementary light source 19

Light combining device 13

First relay system 14

Leveling

device

15, 45

Second relay system 16

Light modulation device 17, 47

Lens 18

First

light combining elements

13a, 43a

Second light combining element 13b

First

light source

11c, 41c

Second light source 11e

Third light source 11d

Smoothing

shaping elements

12a, 12b, 12c, 12e, 12d

First supplementary light source 19a, 49a

Second supplementary light source 19b, 49b

First light homogenizing element 15a, 45a

Second light-

harvesting element

15b, 45b

Third uniform light element 15c

First spatial

light modulator

17a, 47a

Second spatial

light modulator

17b, 47b

Third spatial light modulator 17c

First spot

21, 51, 81

Second spot

22, 52, 82

Third spot

23, 53, 83

First scattering region 701a

Second scattering region 701b

The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.

detailed description

Please refer to FIG. 3. FIG. 3 is a schematic structural view of a first embodiment of the color wheel 10 of the present invention. The color wheel 10 includes a first area 101, a second area 102, and a structural member 103. The first area 101 and the second area 102 are both annular and sleeved together, specifically, the first The region 101 is disposed inside or outside the second region 102, and the structural member 103 is located in a ring shape between the first region 101 and the second region 102.

The structural member 103 may be a circular plate-like structure, and the center of the circle may be provided with a rotating shaft member, so that the color wheel 10 can be rotated about a central axis of the center thereof under the driving of a driving device such as a motor, so that the first Each of the regions 101 and the second regions 102 are sequentially located on the optical path where the light emitted by the excitation light source is located. The material of the structural member 103 may be a material having a high thermal conductivity, in particular, a metal or a non-metal material.

It can be understood that the first area 101 and the second area 102 are both circular, and the width of each area is uniform in each section. In an embodiment, the first area 101 The width may be wider than the width of the second region 102. The first area 101 and the second area 102 are concentric rings. Specifically, the first area 101, the second area 102, and the structural member 103 may all be concentric.

The number of the first area 101 and the second area 102 is at least one, and the first area 101 and the second area 102 are alternately arranged one by one. Specifically, in an embodiment, the number of the second regions 102 is at least two, the number of the first regions 101 is at least one, and the ring of the at least one first region 101 is located at the at least two Between the loops of the second area 102, in the embodiment, the number of the second area 102 is two and the number of the first area 101 is one, that is, in the embodiment, the first A region 101 is located between the two second regions 102 to space the two second regions 102.

Further, in the color wheel, the first region 101 is one of a scattering region and a wavelength conversion region, and the second region 102 is another one of a scattering region and a wavelength conversion region, wherein the scattering region is used. The light is emitted after scattering the received light, and the wavelength conversion region is configured to receive the excitation light and perform wavelength conversion on the excitation light to emit the laser light. Wherein, the first region 101 and the second region 102 are both annular, and the wavelength conversion region can be excited to generate a reduced duty ratio of the laser light without increasing the color wheel size, so that the color The thermal load of the wheel 10 is further reduced.

Further, in the embodiment, the first region 101 is a scattering region and the second region 102 is a wavelength conversion region. It can be understood that the scattering region spaces the two wavelength conversion regions. Since the scattering region and the wavelength conversion region are alternately spaced, when the color wheel cooperates with the excitation light source of the laser, the laser speckle phenomenon is eliminated, and the interval between the two wavelength conversion regions also helps the wavelength. The heat generated during the conversion is dissipated, the color wheel 10 has better heat dissipation performance, and the heat load of the color wheel is small. However, in a modified embodiment, the first region 101 may also be a wavelength conversion region and the second region 102 is a scattering region. In this case, the wavelength conversion region spaces two scattering regions when the color When the wheel 10 is coupled with the excitation light source of the laser, it helps to eliminate the speckle phenomenon of the laser, and also helps the heat of the wavelength conversion region to be released from both sides of the two scattering regions, so that the color wheel 10 has The heat dissipation performance is better, and the heat load of the color wheel 10 is smaller.

As can be seen from the above, in the embodiment, the first region 101 is a scattering region, and the second region 102 is a wavelength conversion region, such as a first conversion region 102a and a second conversion region 102b. A scattering material such as a surface scattering material or a bulk scattering material may be disposed on the scattering region 101 for scattering the received light. The first conversion region 102a is provided with a first wavelength conversion material (such as one of a green wavelength conversion material and a red wavelength conversion material) for generating a first laser beam, and the second conversion region 102b is provided with a second wavelength. A conversion material, such as another of the green wavelength conversion material and the red wavelength conversion material, is used to generate the second received laser. Specifically, the first received laser light may be green fluorescent light, and the second received laser light may be red fluorescent light. Correspondingly, the first wavelength converting material may be a green wavelength converting material, such as a silica gel encapsulated green fluorescent powder. Or glass-encapsulated green phosphor or green fluorescent ceramic material. The second wavelength converting material may be a red wavelength converting material, such as a red phosphor or a glass-encapsulated red phosphor or a red fluorescent ceramic material.

It can be understood that the first region 101 and the second region 102 of the color wheel 10 may have the same substrate. When the color wheel 10 is a transmissive color wheel, the substrate may be a transparent material, the scattering material and The first and second wavelength converting materials are disposed on a surface of the substrate; when the color wheel 10 is a reflective color wheel, the substrate may be a reflective material, or the substrate is a transmissive material, but The scattering material and the first and second wavelength converting materials are disposed on one surface of the substrate, and the reflective material is disposed on the opposite surface of the substrate; the color wheel 10 may also be half The transmissive plate reflective color wheel, such as one of the first region 101 and the second region 102 is a transmissive region, and the other is a reflective region.

Please refer to FIG. 4. FIG. 4 is a schematic structural diagram of a light source system 20 having the color wheel 10 shown in FIG. The light source system 20 includes the color wheel 10, an excitation light source 11, a supplemental light source 19, a light combining device 13, a first relay system 14, a light homogenizing device 15, and a second relay system 16, and the projection device 30 includes The light source system 20, the light modulating device 17, and the lens 18. The light modulating device 17 is configured to modulate light emitted by the light source system 20 to generate image light according to image data. The lens 18 is for projecting the image light to display a projected image.

The excitation light source 11 is configured to emit light to the scattering region 101 and the

wavelength conversion regions

102a, 102b, and the scattering region 101 is configured to emit light after receiving the received excitation light source 11, the wavelength The

conversion regions

102a, 102b are for wavelength-converting the received light of the excitation light source 11 to emit a laser light, and the supplemental light source 19 is for emitting complementary light to expand the color gamut of the light source system (or The light source system 20 and the color gamut of the projection device 30 using the light source system 20, wherein the supplemental light may comprise a laser.

In this embodiment, the scattering region 101 of the excitation light source 11 is further configured to receive the supplemental light and scatter the supplemental light. The light combining device 13 is located on the optical path between the excitation light source 11 and the color wheel 10 and between the supplemental light source 19 and the color wheel 10, and the light combining device 13 is configured to excite the light Light emitted from the light source 11 is combined with the supplementary light and supplied to the scattering region 101 of the color wheel 10. However, it can be understood that, in the modified embodiment, the light combining device 13 may also be located on the scattered light emitted by the color wheel 10 and the optical path on which the laser light is applied, thereby the scattered light, the received laser light, and the supplement. The light is combined.

The light of the excitation light source 11 received by the scattering region 101 is a first color light, the received laser light includes a second color light and a third color light, and the first conversion region 102a is provided with a first wavelength. a conversion material for converting the received light of the excitation light source 11 into a second color light as the first laser light, and the second conversion region 102b is provided with a second wavelength conversion material for receiving the received The light of the excitation light source 11 is converted into the third color light.

Specifically, the excitation light source 11 includes a first light source 11c, a second light source 11e, a third light source 11d, and a plurality of light-shaping

shaping elements

12c, 12e, and 12d. The first light source 11c is configured to emit a first light to the scattering region 101 via the homogenizing shaping element 12c such that the scattering region 101 scatters the first light. The second light source 11e is configured to emit second light to the first conversion region 102a via the light homogenizing shaping element 12e such that the first conversion region 102a converts the second light into the second color light. The third light source 11d is configured to emit third light to the second conversion region 102b via the light homogenizing shaping element 12d such that the second conversion region 102b converts the third light into the third color light. In this embodiment, the first light, the second light, and the third light are all first color light, such as blue light, the second color light is green fluorescent, and the third color light is red fluorescent, and the light is changed. In an embodiment, the second color light is red fluorescent light, and the third color light is green fluorescent light.

The supplemental light may include a second color supplemental light and a third color supplemental light. In this embodiment, the second color supplemental light may be a green supplemental light, and the third color supplemental light may be a red complementary light, and the change may be In an embodiment, the second color supplemental light may be red supplemental light, and the third color supplemental light may be green supplemental light. The supplemental light source 19 includes a first supplemental light source 19a, a second supplemental light source 19b, and a plurality of light-shaping

shaping elements

12a, 12b for emitting the second color supplemental light via the homogenizing shaping element 12a. To the light combining device 13, the second supplemental light source 19b is configured to emit the third color supplemental light to the light combining device 13 via the homogenizing shaping element 12b. Specifically, the light combining device 13 may include a first light combining element 13a and a second light combining element 13b, and the first light combining element 13a is configured to receive the second color supplemental light and the first light source 11c The first light is emitted and the second color supplemental light is combined with the first light, and the second light combining element 13b is configured to receive the third color supplemental light and the first light source 11c The first light and the third color supplemental light are combined with the first light. In this embodiment, the first light combining element 13a and the second light combining element 13b may both be wavelength combining elements, such as a dichroic color film. In other embodiments, the first light combining element 13a The second light combining element 13b may be a polarization combining element, and is not limited to the above.

Further, the first light source 11c, the second light source 11e, the third light source 11d, the first supplemental light source 19a, and the second supplemental light source 19b each include a laser, the first light, the second light, the third light, and the first The two color supplemental light and the third color supplemental light each include a laser, and the second color light and the third color light are both fluorescent. As can be seen from the above, in the embodiment, the first color may be blue, the second color may be green, the third color may be red, and the first color light is blue laser, The second color light is green fluorescent light, the third color light is red fluorescent light, the second color complementary light is green laser light, and the third color complementary light is red laser light; in a modified embodiment, the first color It may be blue, the second color may be red, the third color may be green, the first color light is blue laser, the second color light is red fluorescent, and the third color light For green fluorescence, the second color supplemental light is a red laser, and the third color supplemental light is a green laser.

Please refer to FIG. 5. FIG. 5 is a schematic plan view showing the structure of the color wheel 10 shown in FIG. When the color wheel 10 is in operation, the first light source 11c, the second light source 11e, and the third light source 11d emit blue laser light as the first color light to the scattering region 101, the first conversion region 102a, and the first The second conversion region 102b, the color wheel 10 is rotated along its center such that the respective segments of the scattering region 101 are sequentially located on the optical path of the light emitted by the first light source 11c so that the scattering region 101 emits a scattering The first color light, each segment of the first conversion region 102a is sequentially located on the optical path of the light emitted by the second light source 11e such that the first conversion region 102a generates a second color light, the second The respective sections of the conversion area 102b are sequentially located on the optical path of the light emitted by the third light source 11d so that the second conversion area 102b generates the third color light.

It can be understood that the light emitted by the excitation light source 11 forms a first spot 21 in the scattering region 101, and the second color supplemental light forms a second spot 22 on the scattering region 101, the third color complementary light Forming a third spot 23 on the scattering region 101, the second spot 22 is adjacent to the first conversion region 102a compared to the third spot 23, and the third spot 23 is compared to the second portion The spot 22 is adjacent to the second conversion zone 102b, and the first spot 21 is located between the second spot 22 and the third spot 23. It can be understood that the positions of the above-mentioned

spots

21, 22, 23 are not limited, that is, the positions of the

spots

21, 22, 23 may be adjusted according to actual needs.

The light homogenizing device 15 further includes a first light homogenizing element 15a, a second light homogenizing element 15b, and a third light homogenizing element 15c. In detail, the color wheel 10 emits the first color light, the second color light, the third color light, the second color supplement light, and the third color supplement light, and the light source system further includes a first relay system 14. The first relay system 14 receives the first color light, the second color light, the third color light, the second color supplement light, and the third color supplement light emitted by the color wheel 10 and emits (eg, transmits) The first color light, the second color light, the third color light, the second color complementary light, and the third color complementary light. The first light-harvesting element 15a is located on the optical path of the first color light emitted by the first relay system 14 to receive the first color light emitted by the first relay system 14. The second light homogenizing element 15b is located on the optical path of the second color light and the second color complementary light emitted by the first relay system 14 to receive the second color light emitted by the first relay system 14. And the second color complements the light. The third light-harvesting element 15c is located on the optical path of the third color light and the third color supplemental light emitted by the first relay system 14 to receive the third color light emitted by the first relay system 14. And the third color complements the light. The first light homogenizing element 15a, the second light homogenizing element 15b, and the third light homogenizing element 15c may be a light-diffusing square rod; the first relay system 14 includes an optical relay such as a plurality of relay lenses. The component is used for processing the collected light to improve the light utilization efficiency of the light source system 20. It will be appreciated that in a variant embodiment, the first relay system 14 may be omitted.

It can be understood that, in some embodiments, the first light homogenizing element 15a, the second light homogenizing element 15b and the third light homogenizing element 15c are included in the light homogenizing device 15; the first light homogenizing element 15a, the second The light homogenizing element 15b and the third light homogenizing element 15c are corresponding to the position of the spot of the color wheel spot incident on the light homogenizing device 15 after passing through the first relay system 14, so that different colors can be directly used. The light path of the light is separated.

It can be understood that in other embodiments, when the first relay system 14 can be omitted or the first relay system 14 is provided, the lights of different colors can be homogenized by the light homogenizing device without being distinguished. Then, the different color lights are divided into different optical paths by the subsequent second relay system 16. The split optical path can adopt a common manner such as wavelength (color) splitting, and details are not described herein again. The light homogenizing device 15 may be at least one light-diffusing square rod or a fly-eye lens. In summary, the present invention can have a variety of homogenizing devices and relay system structures different from those described above, and will not be described herein.

The light modulating device 17 includes a first spatial light modulator 17a, a second spatial light modulator 17b, and a third spatial light modulator 17c. In detail, the light homogenizing device 15 emits the first color light, the second color light, the third color light, the second color complementary light, and the third color complementary light, and the light source system further includes a second relay. System 16 , the second relay system 16 receives the first color light, the second color light, the third color light, the second color supplement light, and the third color supplement light emitted by the light homogenizing device 15 The first color light, the second color light, the third color light, the second color complementary light, and the third color complementary light. The first spatial light modulator 17a is located on the optical path of the first color light emitted by the second relay system 16 to receive the first color light emitted by the second relay system 16. The second spatial light modulator 17b is located on the optical path of the second color light and the second color supplemental light emitted by the second relay system 16 to receive the second color emitted by the second relay system 16. Light and second color complement the light. The third spatial light modulator 17c is located on the optical path of the third color light and the third color supplemental light emitted by the second relay system 16 to receive the third color emitted by the second relay system 16. Light and third color complement the light. Specifically, the first spatial light modulator 17a is configured to receive light emitted by the first light homogenizing element 15a via the second relay system 16 and modulate light generated by the first light homogenizing element 15a. An image light (such as blue image light). The second spatial light modulator 17b is configured to receive light emitted by the second light homogenizing element 15b via the second relay system 16 and modulate light emitted by the second light homogenizing element 15b to generate second image light. . The third spatial light modulator 17c is configured to receive light emitted by the third light homogenizing element 15c via the second relay system 16 and modulate light emitted by the third light homogenizing element 15c to generate third image light. . The second relay system 16 includes optical relay elements such as relay lenses. It can be understood that in a modified embodiment, the second relay system 16 can be omitted.

Further, in a modified embodiment of the light source system shown in FIG. 4, the supplemental light source 19 may include only one supplemental light source, such as the first supplemental light source 19a, thereby widening the light only by the second color supplemental light. a color gamut of the light source system 20, at which time the scattering region 101 of the color wheel 10 emits a first color light and a second color complementary light, and the first conversion region 102a of the color wheel 10 emits a second color light, The second conversion region 102b of the color wheel 10 emits a third color light; the supplemental light source 19 may also include only the second supplemental light source 19b, thereby widening the color gamut of the light source system 20 only by the third color supplemental light, The scattering region 101 of the color wheel 10 emits first color light and third color complementary light, the first conversion region 102a of the color wheel 10 emits second color light, and the second conversion region of the color wheel 10 102b emits a third color of light.

Further, in another modified embodiment of the light source system 20 shown in FIG. 4, the color wheel 10 may include only one conversion area, such as including the first conversion area 102a and not including the second conversion area. 102b, the light source system 20 may not include the light source 11d corresponding to the second conversion region 102b. At this time, the scattering region 101 of the color wheel 10 emits first color light, second color complementary light, and third color supplement. Light, the first conversion region 102a of the color wheel 10 emits second color light, whereby the light emitted by the light source system 20 includes a first color light, a second color supplement light, a third color supplement light, and a second color. Light; the color wheel 10 may include only the second conversion area 102b and does not include the first conversion area 102a, and the light source system 20 may not include the light source 11e corresponding to the first conversion area 102a, at this time, the color The scattering region 101 of the wheel 10 emits a first color light, a second color supplemental light, and a third color complementary light, and the second conversion region 102b of the color wheel 10 emits a third color light, thereby being emitted by the light source system 20. Light includes first color light, second color complementary light, The three colors complement the light and the third color.

Compared with the prior art, in the color wheel 10 of the present invention, the light source system 20 including the color wheel 10, and the projection device 30, since the color wheel 10 adopts a circular and sleeved scattering region 101 and a wavelength conversion region 102, Without increasing the size of the color wheel, the wavelength conversion region can be excited to produce a reduced duty cycle of the laser, and the heat load of the color wheel 10 is reduced. In addition, the wavelength conversion region 102 can perform wavelength conversion to generate a laser beam, and the scattering region 101 can scatter light emitted by the excitation light source 11 to reduce speckle. Therefore, the color wheel 10, the light source system 20 and the projection of the present invention are provided. The device 30 can reduce the heat load and reduce the speckle problem while enhancing the projected color gamut. And, since the image light of the same color can be composed of the fluorescence generated by the excitation and the complementary light, exemplary red light is composed of red fluorescence and red laser, and green imaging light is composed of green fluorescence and green fluorescence; laser of the same color And the fluorescence is evenly mixed after passing through the homogenizing element, so that the proportion of the laser light in the image light is lowered, thereby further reducing the speckle effect.

Further, since the color wheel 10 has less thermal effect, a transmissive structure can be adopted. Therefore, for the projection device 30 including the color wheel 10, the system has a simple structure, can realize wide color gamut display and enhance the color gamut of the original projection product. , to achieve a wide color gamut display, has a broader application prospects.

Please refer to FIG. 6 and FIG. 7. FIG. 6 is a schematic structural view of a second embodiment of the light source system 50 and the projection device 60 thereof according to the present invention. FIG. 7 is a schematic plan view showing the color wheel 40 of FIG. The color wheel 40, the light source system 50 and the projection device 60 thereof of the second embodiment are substantially identical in structure to the color wheel 10, the light source system 20 and the projection device 30 of the first embodiment, that is, the first pair The description of the color wheel 10, the light source system 20 and its projection device 30 of the embodiment can be basically applied to the color wheel 40, the light source system 50 and its projection device 60 of the second embodiment, the main differences between which are: The width of the scattering region 401 of the color wheel 40 in the second embodiment is smaller than the width of the scattering region 101 in the first embodiment, and the position of the first light combining member 43a corresponding to the first supplementary light source 49a is compared with the first embodiment. a slight change in the example, such that the second spot 52 formed on the scattering region 401 by the first supplementary light source 49a coincides with the first spot 51 formed on the scattering region 401 by the first light source 41c; The number of the light homogenizing elements of the light homogenizing device 45 of the light source system 50 and the number of spatial light modulators of the light modulating device 47 are also different.

Specifically, as shown in FIG. 7, the light emitted by the first light source 41c of the excitation light source 50 forms the first spot 51 in the scattering area 401, and the second color supplement issued by the first supplementary light source 49a Light forms the second spot 52 on the scattering region 401, and the third color supplemental light emitted by the second supplemental light source 49b forms a third spot 53 on the scattering region 401, the second spot 52 being compared with The third spot 53 is adjacent to the first conversion area 102a, and the third spot 53 is adjacent to the second conversion area 102b, the first spot 51 and the second are opposite to the second spot 52. The positions of the spots 52 coincide. It can be understood that, in an embodiment, in the light source system, light of different colors is emitted at different times, that is, illumination of different colors of light is performed in a time series manner for timing modulation corresponding to the light modulation device. At this time, the first spot 51 and the second spot 52 may appear in different time periods, but the positions of the two may be coincident.

The light homogenizing device 45 includes a first light homogenizing element 45a and a second light homogenizing element 45b, and the first light homogenizing element 45a is configured to receive the first color light and the second color light emitted by the color wheel 40. The second color complementing light, the second light homogenizing element 45b is configured to receive the third color light and the third color complementary light emitted by the color wheel 40. The light modulating device 47 includes a first spatial light modulator 47a and a second spatial light modulator 47b, and the first spatial light modulator 47a is configured to modulate light emitted by the first light concentrating element 45a to generate a first image. Light, the second spatial light modulator 47b is configured to modulate light emitted by the second light homogenizing element 45b to generate second image light.

In the second embodiment, since the width of the scattering region 401 is reduced, the radius of the first conversion region 402a in the color wheel 40 can be increased without further increasing the diameter of the color wheel, thereby further reducing the wavelength of the green light. Converting the duty cycle excited by the blue laser, reducing the thermal effect and improving the conversion efficiency of green light. Further, the number of the light homogenizing elements of the light homogenizing device 45 and the number of spatial light modulators of the light modulating device 47 can be correspondingly reduced, so that the system structure and volume can be simplified, and the light source system 50 and the projection device 60 can be realized. Miniaturization and low cost.

Please refer to FIG. 8. FIG. 8 is a schematic plan view showing the structure of the color wheel 70 in the working state according to the third embodiment of the present invention. The color wheel 70 of the third embodiment is substantially identical in structure to the color wheel 10 of the first embodiment, that is, the above description of the color wheel 10 of the first embodiment is basically applicable to the third. The color wheel 70 of the embodiment has a main difference in that: in the third embodiment, the number of the scattering regions 701 is at least two, that is, the scattering region 701 includes a first scattering region 701a and a second scattering region 701b. The first scattering region 701a, the first conversion region 702a, the second scattering region 701b, and the second conversion region 702b are sequentially disposed from the inside to the outside; the first color light emitted by the excitation light source is in the first scattering region. 701a forms a first spot 81, the second color supplemental light forms a second spot 82 on the first scattering region 701a, and the third color supplemental light forms a third spot 83 on the second scattering region 701b, the first The two spots 82 are adjacent to the first conversion region 702a compared to the first spot 81. It can be understood that the color wheel 70 of the third embodiment can also be applied to the light source system 20 and its projection device 30, in particular, in addition to replacing the color wheel 10, the number of light-smoothing elements and spatial light modulation The number and structure of the devices may be the same as those in the first embodiment, and will not be described herein.

In the third embodiment, compared with the color wheel 10 in the first embodiment, the second scattering region 701b here only scatters laser light of one color, and can be set to a narrow width, thereby ensuring the overall color wheel. The diameter of the green wavelength converting portion (i.e., the first conversion region 702a) is increased without changing the size, the heat load is further reduced, and the conversion efficiency of the green wavelength converting portion is improved. In addition, according to the ratio of three-color light (such as red, green and blue light), and the conversion efficiency of different wavelength conversion materials, the spot size of the red and red lasers may be different from the spot size of the green and green lasers. This can convert the red wavelength conversion region (ie, the second conversion region 702b), the scattering region of the red laser light (ie, the second scattering region 701b), the green wavelength conversion region (ie, the first conversion region 702a), and the green laser scattering region (ie, A scattering region 701b) is set to a different width to minimize the heat load and improve the light efficiency.

In addition, it can be understood that the

color wheel

10, 70, 80, the

light source system

20, 50 of the present invention and the light source system of the modified embodiment thereof can also be used for other display devices (such as liquid crystal display devices), stage light devices, and vehicle lighting devices. The surgical lighting device or the like is not limited to the above-described

projection devices

30, 60.

Claims

A light source system, characterized in that: the light source system comprises a color wheel, an excitation light source and a supplementary light source,

The color wheel includes a scattering region and a wavelength conversion region, wherein the scattering region and the wavelength conversion region are both annular, and the scattering region is disposed on an inner side or an outer side of the wavelength conversion region;

The excitation light source is configured to emit light to the scattering region and/or the wavelength conversion region, and the scattering region is configured to scatter light of the received excitation light source, and the wavelength conversion region is used for Receiving the light of the excitation light source to perform wavelength conversion to emit a laser light,

The supplemental light source is for emitting supplemental light to expand the color gamut of the light source system.
The light source system of claim 1 wherein the scattering region of the color wheel is further for receiving the supplemental light and scattering the supplemental light.
A light source system according to claim 2, wherein said light source system further comprises a light combining means, said light combining means being located between said excitation light source and said color wheel and said complementary light source and said color On the optical path between the wheels, the light combining means is configured to combine the light emitted by the excitation light source with the supplementary light and provide the scattering region of the color wheel.
The light source system according to claim 1, wherein the light of the excitation light source received by the scattering region is a first color light, and the number of the wavelength conversion regions is at least two, the at least two The wavelength conversion region includes a first conversion region and a second conversion region, the laser receiving light includes a second color light and a third color light, and the first conversion region is provided with a first wavelength conversion material for receiving the received The light of the excitation light source is converted into a second color light, and the second conversion region is provided with a second wavelength conversion material for converting the received light of the excitation light source into a third color light, the supplementary light comprising the second The color supplement light and/or the third color complements the light.
A light source system according to claim 4, wherein said number of scattering regions is at least one, and at least one of said scattering regions is located between said first conversion region and said second conversion region.
The light source system of claim 5, wherein the light emitted by the excitation source forms a first spot in the scattering region, the supplemental light comprising a second color supplemental light and a third color supplemental light, a second color supplemental light forming a second spot on the scattering region, the third color supplemental light forming a third spot on the scattering region, the second spot being adjacent to the third spot a first conversion zone, wherein the third spot is adjacent to the second conversion zone, and the first spot is located between the second spot and the third spot.
The light source system of claim 5, wherein the light emitted by the excitation source forms a first spot in the scattering region, the supplemental light comprising a second color supplemental light and a third color supplemental light, a second color supplemental light forming a second spot on the scattering region, the third color supplemental light forming a third spot on the scattering region, the second spot being adjacent to the third spot a first conversion region, wherein the third spot is adjacent to the second conversion zone, and the first spot is coincident with the second spot.
The light source system according to claim 7, wherein said light source system further comprises a first light homogenizing element and said second light homogenizing element, said first light homogenizing element being adapted to receive the first light emitted by said color wheel The color light, the second color light, and the second color supplement light, the second light homogenizing element is configured to receive the third color light and the third color supplement light emitted by the color wheel.
The light source system according to claim 4, wherein the number of the scattering regions is at least two, and the at least two scattering regions comprise a first scattering region and a second scattering region, the first scattering region, The first conversion region, the second scattering region, and the second conversion region are sequentially disposed.
The light source system according to claim 9, wherein the light emitted by the excitation light source forms a first spot in the first scattering region, and the supplemental light comprises a second color supplemental light and a third color complementary light. The second color supplemental light forms a second spot on the first scattering region, and the third color supplemental light forms a third spot on the second scattering region, the second spot being compared to the The first spot is adjacent to the first transition zone.
The light source system according to claim 6 or 10, wherein the light source system further comprises a first light homogenizing element, a second light homogenizing element and a third light homogenizing element, wherein the first light homogenizing element is for receiving a first color light emitted by the color wheel, the second light homogenizing element is configured to receive the second color light and the second color complementary light emitted by the color wheel, and the third light homogenizing element is used Receiving the third color light and the third color supplemental light emitted by the color wheel.
The light source system according to claim 4, wherein the excitation light source comprises a first light source, a second light source, and a third light source, the supplemental light source comprising a first supplemental light source and/or a second supplemental light source, a first light source for emitting first light to the scattering region such that the scattering region scatters the first light, and a second light source for emitting second light to the first transition region such that the first light source a conversion region converting the second light into the second color light, the third light source for emitting a third light to the third conversion region such that the first conversion region converts the third light For the third color light, the first light, the second light, and the third light are all first color lights, and the first supplemental light source is used to emit the second color supplemental light, the second supplement A light source is used to emit the third color supplemental light.
The light source system according to claim 12, wherein the first light source, the second light source, the third light source, the first supplemental light source, and the second supplemental light source each comprise a laser, the first light and the second light The third light, the second color supplemental light, and the third color supplemental light each include a laser; the first color is blue, the second color is one of green and red, and the third color is Another one of green and red.
The light source system according to claim 1, wherein the light of the excitation light source received by the scattering region is a first color light, and the number of the wavelength conversion regions is at least one, and the at least one wavelength conversion The region is for generating a second color of light as the received laser light, the supplemental light includes a second color supplemental light and a third color supplemental light or the supplemental light includes a third color supplemental light.
A projection apparatus comprising a light source system and a light modulating device, wherein the light modulating device is configured to modulate light generated by the light source system to generate image light according to image data, wherein the light source system adopts claims 1-14. The light source system of any of the items.
A projection apparatus comprising a light source system and a light modulating device, wherein the light modulating device is configured to modulate light generated by the light source system to generate image light according to image data, wherein the light source system adopts the method of claim 11 a light source system, the light modulating device comprising a first spatial light modulator, a second spatial light modulator, and a third spatial light modulator, wherein the first spatial light modulator is configured to modulate the emitted by the first light homogenizing element Light generating first image light, said second spatial light modulator for modulating light emitted by said second light homogenizing element to produce second image light, said third spatial light modulator for modulating said third light homogenizing element The emitted light produces a third image light.
A projection apparatus comprising a light source system and a light modulating device, wherein the light modulating device is configured to modulate light generated by the light source system to generate image light according to image data, wherein the light source system adopts the method of claim 8. a light source system, the light modulating device comprising a first spatial light modulator and a second spatial light modulator, wherein the first spatial light modulator is configured to modulate light emitted by the first light homogenizing element to generate first image light, The second spatial light modulator is configured to modulate light emitted by the second light homogenizing element to generate second image light.
A color wheel, wherein the color wheel comprises a first area and a second area, wherein the first area and the second area are both annular, and the number of the second area is at least two The number of the first regions is at least one, and the ring of the at least one first region is located between the rings of the at least two second regions, and the first region is one of a scattering region and a wavelength conversion region. The second region is another one of a scattering region for scattering the received light and a wavelength conversion region for receiving excitation light and wavelength of the excitation light. Converted to emit a laser.
The color wheel according to claim 18, wherein said first region is a scattering region, said second region is a wavelength conversion region, and said at least two wavelength conversion regions comprise a first conversion region and a second conversion a region, the scattering region is located between the first conversion region and the second conversion region, the first conversion region is provided with a first wavelength conversion material for generating a first laser beam, and the second conversion region is provided with The second wavelength converting material is used to generate a second received laser.
The color wheel according to claim 18, wherein said first region is a scattering region and the number is at least two, said scattering region comprising a first scattering region and a second scattering region, said second region being a wavelength conversion region, the at least two wavelength conversion regions including a first conversion region and a second conversion region, wherein the first scattering region, the first conversion region, the second scattering region, and the second conversion region are sequentially disposed The first conversion region is provided with a first wavelength converting material for generating a first received laser light, and the second conversion region is provided with a second wavelength converting material for generating a second received laser light.