WO2019134262A1

WO2019134262A1 - Light source apparatus and projection system

Info

Publication number: WO2019134262A1
Application number: PCT/CN2018/080870
Authority: WO
Inventors: 郭祖强; 杨炳柯; 李屹
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2018-01-03
Filing date: 2018-03-28
Publication date: 2019-07-11
Also published as: CN109991800A; CN109991800B

Abstract

A light source apparatus (1000), comprising: an excitation light source (10), a color wheel (14), a light optimization component, a light guide assembly (18), and a light processing and outputting component (16). The color wheel (14) comprises a conversion area used for receiving excitation light and for generating excited light, and a non-conversion area used for receiving excitation light and outputting excitation light. The light optimization component is used for optimizing the excited light. The light guide assembly (18) is used for guiding the excitation light and the excited light that have undergone the optimization by means of the light optimization component to exit through a same output channel. The light processing and outputting component (16) is used for processing and outputting the excitation light and excited light exiting from the output channel.

Description

Light source device and projection system

Technical field

The present invention relates to the field of optical technologies, and in particular, to a light source device and a projection system using the same.

Background technique

In the current projection light source, the three primary colors are often obtained by means of laser + phosphor, wherein the B primary light is often directly composed of blue laser, and the G primary light and the R primary light are laser generated by phosphor excitation. Composition. Usually, the phosphor is placed on the color wheel, and the laser is irradiated on the rotating color wheel. Different phosphors are placed in different areas of the color wheel to generate laser light of different colors. In general, in order to obtain a base light of a better color, it is necessary to add a filter to perform color correction by a laser. In the prior art, there are mainly three schemes for adding a filter. The first solution is to combine the phosphor and the filter in the inner and outer rings of a color wheel. This scheme is simpler, but a ring of phosphor powder and a ring of filters on the color wheel make the volume larger. It is difficult to achieve miniaturization of the light source; the second solution is to use the filter as a color wheel to form a two-color wheel. This solution requires two color wheels to rotate at the same frequency and initial position, otherwise the color and brightness of the light is emitted. Will be affected. The third solution is to cover the filter on the color wheel phosphor layer. The color wheel of this scheme is small, and the monochrome wheel control is simple. However, the color wheel is difficult to handle the excitation and remains in the laser. Blue laser, the filter must pass the blue light, it is difficult to filter out the residual blue laser, so the color quality of the laser will be reduced; the coating can be used to process a part of the residual blue light, but will bring the spot The problem of proliferation.

Summary of the invention

In order to solve the technical problem of the prior art projection light source, the present invention provides a light source device and a projection system capable of reducing the thickness of the light source while achieving good light source performance.

A light source device comprising:

Exciting a light source for emitting excitation light;

a color wheel comprising two parts, wherein the first part is a conversion area for receiving the excitation light and generating a laser light, and the second part is a non-conversion for receiving the excitation light and emitting the excitation light a region; the conversion region is provided with a phosphor layer and a reflective layer, and the non-conversion region is a transmissive region or a hollow region or a vacant region;

a light optimization component for optimizing the laser received;

a light guiding component for guiding the excitation light, the laser light optimized by the light optimization component is emitted from the same exit channel; the light guiding component comprises a light combining component, and the light combining component is disposed at the excitation Between the light source and the color wheel;

The light processing and output component is configured to process and output the excitation light and the laser light emitted through the exit channel.

In some embodiments, the light optimization element is a filter layer disposed in a conversion region of the color wheel for filtering a laser light generated after the phosphor layer is excited.

In some embodiments, a relay lens is disposed between the light combining element and the light processing and output element.

In some embodiments, the light guiding component comprises an optical guiding element comprising a first optical lens disposed in a transmissive direction of the color wheel, disposed in a direction of reflection of the first optical lens a second optical lens and a third optical lens disposed in a reflection direction of the second optical lens, the light combining element being located in a reflection direction of the third optical lens.

In some embodiments, at least one relay lens is disposed in the optical path of the optical guiding element for shaping the excitation light in the optical path of the optical guiding element.

In some embodiments, the light optimization element includes a fill light path disposed in the optical path of the light combining element for complementing the laser light generated by the phosphor layer being excited.

In some embodiments, the color wheel further includes a third portion, the third portion being a non-conversion region, and the non-conversion region being a transmissive region or a hollowed out region or a vacant region.

In some embodiments, the fill light path is disposed in a transmission direction of the first optical lens, and a light beam generated by the fill light path is transmitted or directly incident from the third portion to the light combining element, wherein In the third part, the excitation light source stops emitting laser light.

In some embodiments, the fill light path is disposed in a transmission direction of the third optical lens, and the light beam generated by the fill light path is transmitted from the third optical lens to the light combining element.

A projection system comprising:

The light source device described above;

An image data processing device for outputting image data according to an image to be displayed;

a light modulating device, configured to output modulated image light according to the light emitted by the light source device and the image data input by the image data processing device; and

a projection lens for displaying a projected image according to the projected image light.

Compared with the prior art, the light source device and the projection system can reduce the thickness of the system and provide good light source performance.

DRAWINGS

Fig. 1 is a schematic structural view of a light source device according to a first embodiment of the present invention.

2 is a schematic view showing the structure of a color wheel of the projection light source shown in FIG. 1.

Fig. 3 is a schematic structural view of a light source device according to a second embodiment of the present invention.

4 is a schematic view showing the structure of a color wheel of the projection light source shown in FIG.

Fig. 5 is a schematic structural view of a light source device according to a third embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a projection system according to an embodiment of the present invention.

Main component symbol description

Light source device

1000, 3000, 5000, 60

Excitation source

10, 30, 50

Light combining elements

12, 32, 52

Color wheel

14,34,54

Light processing and

output components

16, 36, 56

Optical guiding

elements

18, 38, 58

First

optical lens

180, 380, 580

Second

optical lens

182, 382, 582

Third

optical lens

184, 384, 584

First relay lens

19, 39, 59

Second relay lens

110, 310, 510

Collection lens

112, 312, 512

Astigmatism sheet 513

Third relay lens

314, 514

Projection system 6

Light modulation device 62

Image data processing device 64

Projection lens 66

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

Detailed ways

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims.

In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention, but the invention may be practiced in other ways than those described herein, and those skilled in the art can do without departing from the scope of the invention. The invention is not limited by the specific embodiments disclosed below.

The invention is described in detail with reference to the accompanying drawings, which are merely exemplary, and are not intended to limit the scope of the invention.

The invention is described in further detail below by means of specific embodiments.

Embodiments of the present invention disclose a light source device including an excitation light source, a color wheel, a light guiding element, a light processing, and an output element. Wherein the excitation light source is used to emit excitation light (for example, three primary colors of red, green, and blue excitation light or other specified colors of excitation light). The color wheel includes a conversion region for receiving the excitation light and generating a laser, and a non-transition region for receiving the excitation light and emitting the excitation light; wherein the conversion region is provided with a phosphor layer and a reflective layer The non-conversion area is a transmissive area or a hollowed out area or a vacant area. The light guiding element is configured to direct the unconverted excitation light and the converted laser light to exit from the same exit channel. The light processing and output element is configured to process and output excitation light and laser light emitted through the exit channel. In order to improve the converted laser performance, the present invention also provides a light optimization element for optimizing the laser light. The laser light that has been optimized by the light optimization element is directed through the light guide assembly along with the unconverted excitation light to exit from the same exit channel to the light processing and output elements.

Please refer to FIG. 1. FIG. 1 is a schematic structural view of a light source device according to a first embodiment of the present invention. The light source device 1000 includes an excitation light source 10, a light guiding component, a color wheel 14 and a light processing and output element 16, and the excitation light source 10 can emit excitation light, such as red, green, blue primary color excitation light or other specified colors. Excitation light.

The light guiding assembly includes a light combining element 12 and an optical guiding element 18. The light combining element 12 is disposed in the light emitting direction of the excitation light source 10 for outputting the excitation light and the laser light incident on the light combining element 12 in the same optical path by transmission and reflection. In the embodiment, the light combining element 12 is capable of transmitting the excitation light emitted by the excitation light source 10.

A light processing element may be disposed between the excitation light source 10 and the light combining element 12 for performing beam compression, shaping, and convergence processing on the excitation light emitted from the excitation light source 10.

The color wheel 14 is disposed in the transmission direction of the light combining element 12. The color wheel 14 may include a conversion area capable of transmitting or directing excitation light incident to the color wheel 14, and a non-conversion area capable of exciting the incident light to the color wheel 14. The light is converted to be reflected by the laser. In the present embodiment, the conversion region may be provided with a phosphor layer and a reflective layer, and the phosphor layer is excited by the excitation light incident on the color wheel 14 to emit a laser light of a predetermined color. For example, the red phosphor layer is excited to reflect a red laser. In this embodiment, the color wheel 14 includes a first portion and a second portion, wherein the first portion is a transition region, the second portion is a non-conversion region, and the non-conversion region may be a transmissive region, a hollow region, or Vacant area. In some embodiments, the color wheel 14 includes three segments corresponding to the first primary color, the second primary color, and the third primary color, respectively. It can be understood that the color wheel 14 can also be set to other configurations according to actual needs. The color wheel of an embodiment is as shown in FIG. 2, and the color wheel 14 includes three segments of R, G, and B, which are distributed along the circumferential direction of the color wheel 14. Wherein the R and G segments are the first portion, and the first portion is respectively composed of a phosphor layer and a reflective layer, wherein the phosphor layer is excited by the excitation light to generate a laser beam, and the laser light is reflected by the reflective layer to the The light combining element 12 is described. The B segment is a second portion, the second portion is a non-conversion region, and the non-conversion region may be a transmissive region, a hollowed out region, or a vacant region.

The light processing and output element 16 is disposed in a direction of reflection of the light combining element 12. The light processing and output element 16 is configured to process and output the excitation light and the laser light emitted through the light combining element 12, including but not limited to, uniform light, adjusting the spot size, and the like. In some embodiments, the light processing and output element 16 can be a square bar, a light integrator rod, or the like.

The optical guiding element 18 is disposed in a transmission direction of the color wheel 14 for guiding excitation light transmitted or directly transmitted through the color wheel 14 to the light combining element 12. The optical guiding element 18 includes a first optical lens 180 disposed in a transmissive direction of the color wheel 14, a second optical lens 182 disposed in a reflective direction of the first optical lens 180, and a first optical lens 182 disposed therein A third optical lens 184 in the direction of reflection of the second optical lens 182. The light combining element 12 is located in a reflection direction of the third optical lens 184.

The light source device 1000 further includes a first relay lens 19 disposed in the optical guiding element 18 and a second relay lens 110 disposed between the light combining element 12 and the light processing and output element 16. . The light source device 1000 further includes a collection lens 112 disposed between the color wheel 14 and the light combining element 12.

For convenience of description, the operation principle of the light source device 1000 will be described by taking the excitation light source 10 as a third primary color (for example, blue) excitation light as an example. The excitation light source 10 emits a third primary color that is focused on the color wheel 14 through the light combining element 12. The third primary color excitation light focused on the color wheel 14 excites the phosphor layer in the conversion region (for example, the first primary color portion and the second primary color portion) to generate a first primary color, and the second primary color is subjected to laser light, and the laser is collected by the laser. The lens 112 is collected and emitted on the light combining element 12, reflected by the light combining element 12, shaped by the second relay lens 110, and then enters the light processing and output element 16. The third primary color light remaining in the laser light passes through the light combining element 12 and does not enter the light processing and output element 16. The second portion of the color wheel 14 is a transmissive region, a hollowed out region, or a vacant region, and the third primary color excitation light is directly transmitted or directly emitted from the second portion. In some embodiments, in order to make the third primary color excitation light transmitted or directly outgoing more uniform, a diffusion sheet may be disposed in the transmission direction of the second portion or the color wheel 14, the third primary color excitation light passing through After being scattered, the diffusing sheet is emitted to the collecting lens 112 at a divergent angle, and then emitted on the light combining element 12, reflected by the light combining element 12, and shaped by the second relay lens 110 to enter the light. Processing and output component 16. Since the third primary color excitation light itself is concentrated on the color wheel 14, after passing through the color wheel 14, it will be divergent, and then scattered by the diffusion sheet, the divergence angle will be larger. In order to prevent the light beam from being irradiated onto the color wheel motor to cause light leakage, a first optical lens 180 is placed at a position closer to the rear of the color wheel 14, and the first optical lens 180 reflects the light beam to the first relay lens 19, After being shaped by the first relay lens 19, after being reflected by the second optical lens 182 and the third optical lens 184, the light is transmitted through the light combining element 12 to be reflected by the color wheel 14 The same divergence angle of the laser passes through the second relay lens 110 into the light processing and output element 16.

In some embodiments, the second portion of the color wheel 14 is hollowed out, and the divergence angle of the excitation light exiting through the hollowed out region is relatively small. Further, a diffusing sheet may be added to the optical path of the optical guiding member 18 to The angle of the third primary color excitation light is further adjusted.

The first relay lens 19 and the second relay lens 110 are disposed in order to shape, converge, and the like light in the optical path. It is to be understood that the arrangement of the first relay lens 19 and the second relay lens 110 is not limited to the position in the above-described embodiment. For example, the first relay lens 19 may also be disposed between the second optical lens 182 and the third optical lens, or between the first optical lens 180 and the second optical lens 182. A relay lens is disposed between the second optical lens 182 and the third optical lens 184.

The scattering sheet is arranged to make the incident excitation light more uniform, and the emission angle is more in line with expectations. It can be understood that the diffusion sheet can also be replaced by other light-shaping elements, such as a homogenizing rod, a fly-eye lens, etc., as long as It can make the incident excitation light more uniform and the emission angle is more in line with expectations.

The optical path is compact in design and the volume of the light source is small. Providing the first optical lens 17 at a position closer to the rear of the color wheel 14 can well avoid the light leakage caused by the light beam being irradiated onto the color wheel motor, thereby further improving the light utilization efficiency. In this embodiment, in order to correct the color of the laser light generated by the excitation light excitation phosphor layer, a light optimization element is added, which is a filter layer disposed in the reflection section of the color wheel 14. . In some embodiments, the light optimizing element may further include a fill light path added in the optical path design to correct the color of the received laser light.

Please refer to FIG. 3. FIG. 3 is a schematic structural diagram of a light source device according to a second embodiment of the present invention.

The light source device 3000 of the second embodiment incorporates a fill light path based on the light source device 1000 of the first embodiment. The fill light path is disposed in an optical path before the light combining element, and the light emitted by the fill light path is transmitted or reflected by the light combining element, and then the excitation light and the laser light incident on the light combining element 12 are performed. Fill light. For example, the laser light reflected by the color wheel 14 is filled with light to correct the color of the received laser light.

The light source device 3000 includes an excitation light source 30, a light guiding component, a color wheel 34, and a light processing and output element 36. The excitation light source 30 can emit excitation light, such as red, green, and blue primary color excitation light or other specified colors. Excitation light.

The light directing assembly includes a light combining element 32 and an optical guiding element 38. The light combining element 32 is disposed in the light emitting direction of the excitation light source 30 for outputting the excitation light and the laser light incident on the light combining element 32 in the same exit channel by transmission and reflection. In the present embodiment, the light combining element 32 is capable of transmitting the excitation light emitted by the excitation light source 32.

A light processing element may be disposed between the excitation light source 30 and the light combining element 32 for performing beam compression, shaping, and convergence processing on the excitation light emitted by the excitation light source 30.

The color wheel 34 is disposed in the transmission direction of the light combining element 32. The color wheel 34 may include a first portion and a second portion, wherein the first portion is a conversion region capable of converting excitation light incident to the color wheel 34 into being reflected by laser light; The non-conversion region, which may be a transmissive region, a vacant region, or a hollowed out region, is capable of transmitting or directing excitation light incident to the color wheel 34. In the present embodiment, the conversion region may be provided with a phosphor layer and a reflective layer, and the phosphor layer is excited by the excitation light incident on the color wheel 34 to emit a laser light of a predetermined color. For example, the red phosphor layer is excited to reflect a red laser. In some embodiments, the color wheel 34 includes three segments corresponding to the first primary color, the second primary color, and the third primary color, respectively. It can be understood that the color wheel 34 can also be set to other configurations according to actual needs. In some embodiments, a third portion may be disposed on the color wheel 34 corresponding to the fill light path, the third portion being a non-conversion region, and the non-conversion region may be a transmissive region, a vacant region, or a hollow region. . The third portion may serve as an excitation light incident on the light combining element 32 or a light-filling segment subjected to laser light, for example, a first primary color fill portion and a second primary color fill portion. The color wheel of one embodiment is as shown in Fig. 4. The color wheel 34 can be divided into five segments of R, G, B, R', and G', distributed along the circumferential direction of the color wheel 34. Wherein the R and G segments are the first portion, and the first portion is respectively composed of a phosphor layer and a reflective layer, wherein the phosphor layer is excited by the excitation light to generate a laser beam, and the laser light is reflected by the reflective layer to the The light combining element 32 is described. The B segment is the second portion, and the second portion is the transmissive zone, the vacant zone or the hollowed out zone. The R', G' is a third portion, and the third portion is a transmissive region, a vacant region, or a hollowed out region. R' is disposed between the B segment and the R segment, and the G' is disposed between the B segment and the G segment. It will be appreciated that the distribution of the color wheel 34 may also be other distributions, such as placing R', G' between the R segment and the G segment.

The light processing and output element 36 is disposed in a direction of reflection of the light combining element 32. The light processing and output element 36 is configured to process and output the excitation light and the laser light emitted through the light combining element 32, including but not limited to, uniform light, adjusting the spot size, and the like. In some embodiments, the light processing and output element 36 can be a square bar, a light integrator rod, or the like.

The optical guiding element 38 is disposed in the transmission direction of the color wheel 34 for guiding the excitation light transmitted or directly transmitted through the color wheel 34 to the light combining element 32. The optical guiding element 38 includes a first optical lens 380 disposed in a transmissive direction of the color wheel 34, a second optical lens 382 disposed in a reflective direction of the first optical lens 380, and A third optical lens 384 in the direction of reflection of the second optical lens 382. The light combining element 32 is located in a reflection direction of the third optical lens 384.

The light source device 3000 further includes a first relay lens 39 disposed in the optical guiding element 38 and a second relay lens 310 disposed between the light combining element 32 and the light processing and output element 36 . The light source device 3000 further includes a collection lens 312 disposed between the color wheel 34 and the light combining member 32.

In this embodiment, the fill light path may be a first primary color and a second primary color combined light path for receiving light by the laser for the first primary color and by the laser for the second primary color. The first primary color and the second primary color combination optical path include a first primary color laser exciter (not shown) for emitting first primary color excitation light and a second primary color laser exciter for emitting a second primary color laser (not And a mirror (not shown) and a dichroic film (not shown) disposed in a direction in which the first primary color laser driver is emitted, and a third relay lens 314.

The first primary color and the second primary color excitation light emitted by the first primary color laser exciter and the second primary color laser exciter are merged into a path through the mirror and the dichroic color chip, and then shaped by the third relay lens 314. Transmitted from the R', G' segments of the color wheel 34 and reflected by the light combining element 32 through the first optical lens 380, and the third primary color excitation light, the first primary color, and the second primary color are received by the laser The light is merged and then passed through the second relay lens into the light processing and output element 36.

In this configuration, the third portion of the color wheel 34 is a transmissive region or a hollowed out region or a vacant region, and the third portion may also be provided with a diffusing sheet. In the third portion, the third primary color laser is turned off, and the first primary color and the second primary color laser are sequentially switched. Since the two-stage color wheel is added, if the light source is applied to the optical machine of the digital light processing, the control method of the DMD also needs to be changed accordingly. Taking the 3-segment color wheel as an example, in the cycle in which the color wheel rotates one revolution, the DMD needs to process the three primary colors of R, G, and B in a time series, and the micromirror needs to be inverted three times according to the gray scales of R, G, and B. For this 5-segment color wheel, the DMD needs to process five colors of R, G, B, and R', G', and it is necessary to control the micromirror to flip five times. The processor needs to give the micromirror inversion signals of the five segments R, G, B, and R', G' according to the R, G, and B gray levels of the image. Taking the R segment as an example, the micromirror flip time is given by the following formula:

Where r is the angle of the R segment on the color wheel, m is the red light gray level of the image, and t ₀ is the time the color wheel rotates one revolution. The flipping time of other color segments is the same.

In this embodiment, after the first primary color and the second primary color laser are added, the color filter can be obtained by removing the filter, and the entire light source can be made thin, and the optical energy loss caused by the filter is not obtained. The brightness will be higher.

It can be understood that the color wheel shown in FIG. 2 and FIG. 4 is described by taking red as the first primary color, green as the second primary color, and blue as the third primary color as an example. In other embodiments, it is not limited thereto. The three primary color sequences can be exchanged, and can be set to other colors as needed.

Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of a light source device according to a third embodiment of the present invention.

The light source device 5000 of the third embodiment incorporates a fill light path of another embodiment on the basis of the light source device 1000 of the first embodiment.

The light source device 5000 includes an excitation light source 50, a light guiding component, a color wheel 54 and a light processing and output element 56. The excitation light source 50 can emit excitation light, such as red, green, blue primary color excitation light or other specified colors. Excitation light.

The light guiding assembly includes a light combining element 52 and an optical guiding element 58. The light combining element 52 is disposed in the light emitting direction of the excitation light source 50 for outputting the excitation light and the laser light incident on the light combining element 52 in the same optical path by transmission and reflection. In the embodiment, the light combining element 52 is capable of transmitting the excitation light emitted by the excitation light source 52.

A light processing element may be disposed between the excitation light source 50 and the light combining element 52 for performing beam compression, shaping, and convergence processing on the excitation light emitted by the excitation light source 50.

The color wheel 54 is disposed in the transmission direction of the light combining element 52. The color wheel 54 can include a first portion and a second portion, wherein the first portion is a transition region and the second portion is a non-conversion region, and the non-conversion region can be a transmissive region, a hollowed out region, or a vacant region. Wherein the non-conversion region is capable of transmitting or directing excitation light incident to the color wheel 54, and the conversion region is capable of converting the excitation light incident to the color wheel 54 into a laser light and then reflecting it out. In the present embodiment, the conversion region may be provided with a phosphor layer and a reflective layer, and the phosphor layer is excited by the excitation light incident on the color wheel 54 to emit a laser light of a predetermined color. For example, the red phosphor layer is excited to reflect a red laser. In some embodiments, the color wheel 54 includes three segments corresponding to the first primary color, the second primary color, and the third primary color, respectively. It can be understood that the color wheel 54 can also be set to other configurations according to actual needs. The color wheel of an embodiment is as shown in FIG. 2. The color wheel 14 includes three segments of R, G, and B, which are distributed along the circumferential direction of the color wheel 54. Wherein the R and G segments are the first portion, and the first portion is a conversion region, which is respectively composed of a filter layer, a phosphor layer and a reflective layer, and the phosphor layer is capable of generating a laser beam after being excited by the excitation light. The laser light is reflected by the reflective layer to the light combining element 52. The B segment is a second portion, and the second portion is a non-conversion region, which may be a transmissive region, a hollowed out region, or a vacant region.

The light processing and output element 56 is disposed in a direction of reflection of the light combining element 52. The light processing and output element 56 is configured to process and output the excitation light and the laser light emitted through the light combining element 52, including but not limited to, uniform light, adjusting the spot size, and the like. In some embodiments, the light processing and output element 56 can be a square bar, a light integrator rod, or the like.

The optical guiding member 58 is disposed in a transmission direction of the color wheel 54 for guiding excitation light transmitted or directly transmitted through the color wheel 54 to the light combining member 52. The optical guiding element 58 includes a first optical lens 580 disposed in a transmissive direction of the color wheel 54, a second optical lens 582 disposed in a reflective direction of the first optical lens 580, and A third optical lens 584 in the direction of reflection of the second optical lens 582. The light combining element 52 is located in a reflection direction of the third optical lens 584.

The light source device 5000 further includes a first relay lens 59 disposed in the optical guiding element 58 and a second relay lens 510 disposed between the light combining element 52 and the light processing and output element 56. . The light source device 5000 further includes a collecting lens 512 disposed between the color wheel 54 and the light combining member 52.

For convenience of description, the operation principle of the light source device 5000 will be described by taking the excitation light source 50 as a third primary color (for example, blue) excitation light as an example. The excitation light source 50 emits a third primary color that is focused on the color wheel 54 through the light combining element 52. The third primary color excitation light focused on the color wheel 54 excites the phosphor layer in the conversion region (eg, the first primary color portion and the second primary color portion) to generate a first primary color received by the laser, the second primary color is received by the laser, and the first primary color, The second primary color is collected by the laser through the collecting lens 512, and then emitted by the light combining element 52, reflected by the light combining element 52, shaped by the second relay lens 510, and then enters the light processing and output. Element 56. The third primary color light remaining in the laser light passes through the light combining element 52 and does not enter the light processing and output element 56. The second portion of the color wheel 54 is disposed as a non-conversion region (transmissive region or hollowed out region or vacant region), and the third excitation light is directly transmitted or directly emitted from the second portion. In some embodiments, in order to make the transmitted third primary color excitation light more uniform, a diffusion sheet may be disposed in a transmission direction of the second portion or the color wheel 54, the third primary color excitation light passing through the diffusion sheet After astigmatism, it is emitted to the collecting lens 512 at a divergent angle, and then emitted on the light combining element 52, reflected by the light combining element 52, shaped by the second relay lens 510, and then enters the light processing and Output element 56. Since the third primary color excitation light itself is concentrated on the color wheel 54, after passing through the color wheel 54, it will be divergent, and then scattered by the diffusion sheet, the divergence angle will be larger. In order to avoid light leakage caused by the illumination of the light beam on the color wheel motor, a first optical lens 580 is placed at a position closer to the rear of the color wheel 54, and the first optical lens 580 reflects the light beam to the first relay lens 59, After being shaped by the first relay lens 59, after being reflected by the second optical lens 582 and the third optical lens 584, the light is transmitted through the light combining element 52 to be reflected by the color wheel 54. The same divergence angle of the laser passes through the second relay lens 510 into the light processing and output element 56.

In some embodiments, the second portion of the color wheel 54 is hollowed out, and the divergence angle of the excitation light exiting through the hollow region is relatively small. Further, a diffusing sheet may be added to the optical path of the optical guiding member 58. The angle of the third primary color excitation light is further adjusted.

The first relay lens 59 and the second relay lens 510 are both disposed for shaping, concentrating, and the like of light in the optical path. It is to be understood that the arrangement of the first relay lens 59 and the second relay lens 510 is not limited to the position in the above-described embodiment. For example, the first relay lens 59 may also be disposed between the second optical lens 582 and the third optical lens, or between the first optical lens 580 and the second optical lens 582. A relay lens is disposed between the second optical lens 582 and the third optical lens 584.

The fill light path is described by taking a first primary color and a second primary color combined light path as an example. The first primary color and the second primary color include a first primary color laser exciter (not shown) for emitting a first primary color laser and a second primary color laser exciter (not shown) for emitting a second primary color laser. And a mirror (not shown) and a dichroic film (not shown), a diffuser 513 and a third relay lens 514 disposed in a direction in which the first primary color laser driver emits light.

The first primary color and the second primary color laser emitted by the first primary color laser exciter and the second primary color laser exciter are first combined into a path through the mirror and the dichroic color, and then passed through the diffusing plate 513 and the third relay. After the lens 514 is scattered and shaped, it passes through the third optical lens 584 and is focused at a point at the light combining element 52. The first primary color and the second primary color laser light are transmitted through the region plating on the light combining element 52, and then enter the light processing and output element 56 through the second relay lens 510.

Compared with the scheme of the second embodiment, the optical path does not need to be modified by the color wheel, the efficiency of the color wheel is higher, the brightness that can be finally obtained is larger, and the processing of the optical signal is also simpler.

In the second embodiment and the third embodiment, the fill light paths are described by taking the first primary color and the second primary color laser light combining light path as an example. It can be understood that the fill light path is not limited to the first A primary color and a second primary color laser fill light. For example, the fill light path may be selected to fill light only by the laser light of one of the colors, or to fill light or the laser light incident on the light combining element. The fill light path can be changed according to actual needs and the color segment configuration of the color wheel and the configuration of the excitation light source.

In addition, it should be understood that, in the structural diagrams of the first to third embodiments, other light processing elements may be disposed on the optical path where the laser light and the laser light are located, and the laser light and the laser light are applied. The light is dimmed and/or the optical path is changed, and/or the laser, the laser is collected, diffused, shaped, etc., so that the laser and the laser are irradiated onto the light homogenizing element according to a predetermined spot size. The light processing component may include at least one or one of a light-harvesting component (such as a light-dancing bar, a fly-eye lens), a collecting lens, a relay lens, and the like, and may be determined according to actual needs, and details are not described herein. .

The invention also provides a projection system, which can be applied to a projector, an LCD (Liquid Crystal Display) display or the like. FIG. 6 is a schematic structural diagram of a projection system according to an embodiment of the present invention. The projection system 6 may include a light source device 60, a light modulating device 62, an image data processing device 64, and a projection lens 66, which uses the

light source device

1000, 3000 or 5000 in the above embodiment. The light modulating device 62 is configured to output modulated image light according to the light emitted by the light source device 60 and the image data modulated by the image data processing device 64, and the projection lens 66 is configured to modulate the image light according to the light. Projection is performed to display a projected image. The projection system using the above-described

light source device

1000, 3000 or 5000 has a smaller light source, a more compact structure, and a larger brightness of the light source.

In addition, it can be understood that the

light source device

1000, 3000 or 5000 of the present invention can also be used for a stage light system, an in-vehicle illumination system, a surgical illumination system, etc., and is not limited to the above-described projection system.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation of the present invention and the contents of the drawings may be directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims

A light source device, characterized in that the light source device comprises:

Exciting a light source for emitting excitation light;

a color wheel comprising two parts, wherein the first part is a conversion area for receiving the excitation light and generating a laser light; the conversion area is provided with a phosphor layer and a reflective layer, and the second part is for receiving Deriving light and emitting a non-conversion region of the excitation light, the non-conversion region being a transmissive region or a hollow region or a vacant region;

a light optimization component for optimizing the laser received;

a light guiding component for guiding the excitation light, the laser light optimized by the light optimization component is emitted from the same exit channel; the light guiding component comprises a light combining component, and the light combining component is disposed at the excitation Between the light source and the color wheel;

The light processing and output component is configured to process and output the excitation light and the laser light emitted through the exit channel.
The light source device according to claim 1, wherein the light optimization element is a filter layer disposed in a conversion region of the color wheel for performing laser light generated after the phosphor layer is excited Filtered.
The light source device according to claim 1, wherein a relay lens is disposed between the light combining element and the light processing and output element.
The light source device according to claim 1, wherein said light guiding member comprises an optical guiding member, said optical guiding member comprising a first optical lens disposed in a transmitting direction of said color wheel, said a second optical lens in a reflection direction of the first optical lens and a third optical lens disposed in a reflection direction of the second optical lens, the light combining element being located in a reflection direction of the third optical lens.
The light source device according to claim 4, wherein at least one relay lens is disposed in the optical path of the optical guiding member for shaping the excitation light in the optical path of the optical guiding member.
A light source device according to claim 4, wherein said light optimizing element comprises a fill light path disposed in an optical path in front of said light combining element for receiving said phosphor layer The laser fills the light.
A light source device according to claim 6, wherein said color wheel further comprises a third portion, said third portion being a non-conversion region, said non-conversion region being a transmissive region, a hollowed out region or a vacant region.
The light source device according to claim 7, wherein the fill light path is disposed in a transmission direction of the first optical lens, and a light beam generated by the fill light path is transmitted or directly incident from the third portion to The light combining element, wherein in the third portion, the excitation light source stops emitting excitation light.
The light source device according to claim 6, wherein the fill light path is disposed in a transmission direction of the third optical lens, and a light beam generated by the fill light path is incident from the third optical lens To the light combining element.
A projection system, characterized in that the projection system comprises:

A light source device according to any one of claims 1 to 9;

An image data processing device for outputting image data according to an image to be displayed;

a light modulating device, configured to output modulated image light according to the light emitted by the light source device and the image data input by the image data processing device; and

a projection lens for displaying a projected image according to the projected image light.