CN105652572B - Light source system and projection equipment - Google Patents

Abstract

The present invention provides a light source system and a projection device. The light source system includes at least two light sources, a wavelength conversion device, a first light guiding component and a second light guiding component, the at least two light sources include an excitation light source and a first supplementary light source, The excitation light source is used to emit excitation light; the first light guiding component is used to guide the excitation light to the wavelength conversion device, and guide the light emitted by the wavelength conversion device to the uniform light device; the wavelength conversion device is used to guide the excitation light converted into the subject light, and emit the subject light to the first light guiding component; the first supplementary light source emits the first supplementary light, and the etendue of the first supplementary light is smaller than the subject light; the second light guiding component is used for The first supplemental light is directed to the dodging device, wherein the second light directing component has a smaller size than the first light directing component. The present invention can greatly improve the light utilization rate of the first supplementary light.

Description

Light source system and projection equipment

This application is a divisional application based on the patent application with the application number 201410284185.3, the invention name is light source system and projection equipment, and the application date is 2014-06-23.

technical field

The present invention relates to the field of optical technology, more specifically, to a light source system and projection equipment.

Background technique

At present, solid-state light sources have been widely used in general lighting, special lighting and projection display due to their long life and environmental protection. Among them, the white light solid-state light source has great development potential in the field of lighting.

The prior art provides a white light source that uses laser to excite phosphor powder to achieve ultra-high brightness. The white light source uses a blue-violet laser with a wavelength of 440nm-455nm to excite yellow phosphor powder of YAG:Ce material to generate high-efficiency yellow fluorescence. A blue laser with a wavelength of 440nm-470nm is then used to form a blue laser complementary to the yellow fluorescence, and the yellow fluorescence and the blue laser combine to form a white light source.

The white light source can be used in the field of projection display requiring a high-brightness light source. Such as 3DLP, 3LCD, or 3LCOS projectors, etc. The white light emitted by this white light source is spectrally divided into three primary colors of red light, green light and blue light, which are respectively incident on one or more light modulation devices, such as DMD, LCD chips, or LCOS chips. The three primary colors of red, green and blue light modulated by the light modulation device are combined in the spectrum and then output to the screen through a projection lens to form a color image. Due to the relatively high efficiency of the blue-violet laser, thermal stability and long-term reliability are good. The fluorescent powder of YAG: Ce material has high luminous quantum efficiency and good thermal stability, so the combination of blue-violet laser and YAG: Ce phosphor forms a high-efficiency, high-reliability, and high-brightness white light source.

However, in a white light source that uses a blue-violet laser to excite YAG:Ce material phosphor powder to form white light, since the yellow light spectral intensity of YYAG:Ce material phosphor powder stimulated emission is weakened in the red segment, so that this kind of white light The light source has a white balance problem, that is, the white light balance point deviates from the Planckian black body curve, showing a greenish white.

In order to avoid the white balance problem, the prior art provides a method of filtering the excess green light component in the synthesized white light, so that the white balance point can be restored to the Planckian black body curve, so as to solve the white balance problem. However, this method reduces the light extraction efficiency of the white light source because the green light component is filtered.

The existing technology provides another method of adding red laser light to the yellow fluorescent light to solve the white balance problem of the white light source, such as supplementing the yellow fluorescent light with a laser with a spectral range around 638nm or 650nm to increase the red component in the combined light. , thus solving the white balance problem.

As shown in FIG. 1 , the structure of a light source system in which red laser light is added to yellow fluorescent light provided by the prior art. The light source system includes a blue excitation light source 11 , a red supplementary light source 12 , a spectral filter 13 with a central area and an edge area, a color wheel 14 , a condenser lens 15 and a uniform light device 16 . The central area of the spectral filter 13 transmits blue light and red light, reflects green light, and the edge area reflects red light, green light and blue light. In this way, the blue excitation light emitted by the blue laser light source 11 and the red light emitted by the red supplementary light source 12 are transmitted to the color wheel 14 through the central area of the spectral filter 13, and the yellow phosphor on the color wheel 14 absorbs the blue excitation light. Simultaneously, the red light is scattered, and yellow fluorescent light and scattered red light are emitted, and the yellow fluorescent light and scattered red light are incident to the spectral filter 13 through the condenser lens 15, and the yellow light that is incident to the center area of the spectral filter 13 The green light in the fluorescence is reflected to the uniform light device 16, and the yellow fluorescent light and red light incident to the edge area of the spectral filter 13 are also reflected to the uniform light device 16, while the incident light to the central area of the spectral filter 13 The red light in the yellow fluorescent light and the scattered red light are transmitted and lost.

In the above-mentioned existing white light source, the red light emitted by the red supplementary light source is scattered by the fluorescent material, resulting in a loss of about 5%-10%. After the Lambertian light distribution is formed, it is collected by the condenser lens and causes a loss of about 10%, and then it is transmitted by the central area of the spectral filter and loses a part of the light, about 10%, resulting in the loss of red light emitted by the red supplementary light source. The loss is relatively large, and the light utilization rate of red light is low, about 60-70%.

Contents of the invention

In view of this, the present invention provides a light source system and a projection device to solve the problem of low light utilization efficiency of red light emitted by a red supplementary light source in the prior art.

To achieve the above object, the present invention provides the following technical solutions: a light source system, the light source system includes at least two light sources, a wavelength conversion device, a first light guiding component and a second light guiding component, the at least two light sources include An excitation light source and a first supplementary light source, wherein:

The excitation light source is used to emit excitation light;

The first light guiding component is used to guide the excitation light to the wavelength conversion device, and guide the stimulated light emitted by the wavelength conversion device to the uniform light device;

The wavelength conversion device is used to convert the excitation light into the subject light, and emit the subject light to the first light guiding component;

The first supplementary light source emits first supplementary light, and the etendue of the first supplementary light is smaller than that of the received light;

The second light guiding component is used to guide the first supplementary light to the light dodging device, and the size of the second light guiding component is smaller than that of the first light guiding component.

The present invention also provides a projection device, which includes the above-mentioned light source system.

Compared with the prior art, the technical solution provided by the present invention has the following advantages:

The present invention can increase the ratio of the first supplementary light in the combined light by supplementing the first supplementary light in the received light, and at the same time, because the first light guiding component directly guides the first supplementary light to the uniform light device without wavelength conversion Scattering of the device, thereby avoiding the light loss of the first supplementary light due to the scattering of the wavelength conversion device, and greatly improving the light utilization rate of the first supplementary light.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural diagram of a light source system provided by the prior art;

2 is a schematic structural diagram of the light source system provided by the first embodiment of the present invention;

3 is a schematic diagram of a filter curve of an optical filter provided by an embodiment of the present invention;

4 is a schematic structural diagram of a light source system provided by a second embodiment of the present invention;

5 is a schematic structural diagram of a light source system provided by a third embodiment of the present invention;

6 is a schematic structural diagram of a light source system provided by a fourth embodiment of the present invention;

7 is a schematic structural diagram of a light source system provided by a fifth embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a light source system provided by an embodiment of the present invention;

9 is a schematic structural diagram of a light source system provided by a sixth embodiment of the present invention;

Fig. 10 is a schematic structural diagram of a light source system provided by a seventh embodiment of the present invention;

Fig. 11 is a schematic structural diagram of a light source system provided by an eighth embodiment of the present invention.

detailed description

The present invention provides a light source system comprising at least two light sources, a wavelength conversion device, a first light guiding component and a second light guiding component, wherein the at least two light sources include an excitation light source and a first supplementary light source, wherein :

The excitation light source is used to emit excitation light;

The first light guiding component is used to guide the excitation light emitted by the excitation light source to the wavelength conversion device, and guide the stimulated light emitted by the wavelength conversion device to the uniform light device;

The wavelength conversion device is used to convert the excitation light into the subject light, and emit the subject light to the first light guiding component;

The first supplementary light source emits first supplementary light, and the etendue of the first supplementary light is smaller than the received light;

The second light guiding part is used to guide the first supplementary light to the dodging device, and the size of the second light guiding part is smaller than that of the first light guiding part.

Preferably, the size of the second light guiding component can be based on the amount of light loss when the excitation light passes through the second light guiding component, the amount of light loss when the first supplementary light passes through the second light guiding component, the amount of light loss when the second supplementary light passes through the second One or more combinations of the amount of light loss when the light is guided through the second light guide member and the amount of light loss when the received light passes through the second light guide member are set. Preferably, the area of the second light guiding member is less than 50% of the area of the useful light spot. Wherein the useful spot area refers to the area of the spot formed by the received light emitted by the wavelength conversion device on the first light guiding component.

The present invention also provides a projection device, including the above-mentioned light source system.

The light source system provided by the present invention includes at least two light sources. The at least two light sources include an excitation light source and a first supplementary light source. The device converts the received light into light, and the received light is guided to the light homogenizing device through the first light guiding component, and the first supplementary light emitted by the first supplementary light source whose expansion is smaller than the received light is directly guided to the light homogenizing device through the second light guiding component, thus obtaining Combination of the received light and the first supplementary light, in this way, by supplementing the first supplementary light in the subject light, the proportion of the first supplementary light in the combined light can be increased, and at the same time, the first light guiding component directly guides the first supplementary light to the light homogenizing device without being scattered by the wavelength conversion device, thereby avoiding the light loss of the first supplementary light due to the scattering of the wavelength conversion device, and greatly improving the light utilization efficiency of the first supplementary light.

The above is the core idea of the present invention. In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and understandable, the specific implementation modes of the present invention will be described in detail below in conjunction with the accompanying drawings.

In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. Similar applications, therefore, the present invention is not limited by the specific embodiments disclosed below.

Secondly, the present invention is described in detail in combination with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it should not be limited here. The protection scope of the present invention. In addition, the three-dimensional space dimensions of length, width and depth should be included in actual production.

The following describes in detail through several embodiments.

Embodiment one

This embodiment provides a light source system. As shown in FIG. 2 , the light source system includes two light sources, respectively an excitation light source 21 and a first supplementary light source 22 , and also includes a first light guiding component 23 and a wavelength conversion device 24 , the second light guiding component 25 and the light dodging device 26 . In this embodiment, the first light guiding component 23 and the second light guiding component 25 realize light splitting and combination by using wavelengths. The first light guiding component 23 includes a filter 231 having a central film and edge films, and the second light guiding component 25 is the central film of the filter 231 . in:

The excitation light source 21 emits excitation light. The excitation light source 21 is a semiconductor diode or a semiconductor diode array. The semiconductor diode may be a laser diode (LD) or a light emitting diode (LED). The excitation light is blue light, purple light or ultraviolet light.

The first light guiding member 23 guides the excitation light emitted by the excitation light source 21 to the wavelength conversion device 24 , and guides the stimulated light emitted by the wavelength conversion device 24 to the light homogenization device 26 . In this embodiment, the first light guiding component 23 includes a filter 231 having a central film and edge films. The central diaphragm and the edge diaphragms can be integral diaphragms, or separate diaphragms respectively.

Wherein the size of the central membrane is smaller than that of the edge membranes. The size of the central diaphragm can be based on one of the light loss when the first supplementary light passes through the central diaphragm, the light loss when the exciting light passes through the central diaphragm, the light loss when the receiving light passes through the central diaphragm, or Various combinations can be set. The size of the central diaphragm can be set such that the light loss of the first supplementary light passing through the central diaphragm is less than a preset ratio and the light loss of the received light is smaller than a preset ratio. Preferably, the area of the central diaphragm is less than 50% of the effective light spot area.

If the wavelength conversion device 24 is a reflective wavelength conversion device, the central diaphragm of the optical filter 231 transmits the excitation light and the first supplementary light and reflects the subject light or a part of the subject light or reflects the excitation light and the first supplementary light. For light other than light, the edge diaphragm of the optical filter 231 is a reflector, or the edge diaphragm reflects the received light;

If the wavelength conversion device 24 is a transmission wavelength conversion device, the central diaphragm of the optical filter 231 transmits the first supplementary light and reflects the received light or a part of the received light or reflects other light except the first supplementary light. The edge film of the optical filter 231 is a reflective film, or the edge film reflects the received light. Please refer to FIGS. 3a and 3b , which are one example of the filter curves of the central diaphragm and the edge diaphragms provided by the embodiment of the present invention. However, the filter curves of the central diaphragm and the edge diaphragm are not limited to those shown in Fig. 3a and Fig. 3b, and can also be set according to the different spectral ranges of the excitation light, the first supplementary light, and the subject light. When the excitation light is light with a wavelength range less than 480nm, such as blue light, violet light or ultraviolet light, and the first supplementary light is light with a wavelength range greater than 620nm, such as red light, the filter curve of the central diaphragm can be shown in Figure 3a, The filter curve of the edge diaphragm can be shown in Fig. 3b. Referring to Fig. 3a, the central diaphragm reflects light with a wavelength greater than 480nm and less than 620nm, and transmits light with a wavelength less than 480nm or greater than 620nm. Please refer to Fig. 3b, the edge diaphragm reflects light with a wavelength greater than 480nm and transmits light with a wavelength less than 480nm.

In a preferred embodiment of the present invention, the first light guiding component 23 further includes a condenser lens 232 disposed between the optical filter 231 and the light path of the uniform light device 26 . The condenser lens 232 is used for collecting the light guided by the filter 231 and converging it to the light homogenizing device 26 .

The wavelength conversion device 24 receives the excitation light guided by the first light guide member 23 or directly emitted by the excitation light source to the wavelength conversion device 24 , converts the excitation light into a subject light, and emits the subject light to the first light guide member 23 . In this embodiment, the light emitted by the wavelength conversion device 24 includes the converted light, or includes the converted light and the excitation light not converted by the wavelength conversion device. The wavelength conversion device 24 emits the received light and the unconverted excitation light to the first light guide part 23, and the edge diaphragm of the optical filter 231 in the first light guide part 23 converts the received light and the unconverted excitation light are all guided to the uniform light device 26, and the central diaphragm of the optical filter 231 in the first light guide part 23 will receive the light and the unconverted excitation light with the excitation light emitted by the excitation light source 21 and the first supplementary light source 22 The emitted light with different spectral ranges of the first supplementary light is reflected to the uniform light device 26 .

The wavelength conversion device 24 can be a transmission wavelength conversion device (such as including a transparent substrate and a wavelength conversion material doped inside the transparent substrate) or a reflective wavelength conversion device (such as a wavelength conversion layer directly coated on a reflective substrate) . The wavelength conversion material includes but not limited to phosphor powder, quantum dot material and the like. The wavelength conversion layer is a layer of wavelength conversion material or a diaphragm formed by sintering the wavelength conversion material and an adhesive, or the like. Preferably, the wavelength converting material may be yellow phosphor, yellow-green phosphor, green phosphor, etc.

Please refer to FIG. 2 , the wavelength conversion device is a reflective wavelength conversion device. The optical filter 231 included in the first light guide member 23 is arranged between the optical path of the excitation light source 21 and the wavelength conversion device 24, and the excitation light emitted by the excitation light source 21 is transmitted to the wavelength conversion through the central diaphragm of the optical filter 231. device 24 , the converted light emitted by the wavelength conversion device 24 , or the converted light and the excitation light not converted by the wavelength conversion device 24 are reflected to the homogenization device 26 through the filter.

In another embodiment of the present invention, if the wavelength conversion device 24 is a transmissive wavelength conversion device (not shown in the figure), the filter 231 included in the first light guiding component 23 is arranged between the wavelength conversion device 23 and the uniform light Between the light paths of the device 26, the excitation light emitted by the excitation light source 21 can directly enter the wavelength conversion device without being guided by the filter included in the first light guiding component, and the filter will output the wavelength conversion device 24 The stimulated light, or the stimulated light and the excitation light not converted by the wavelength conversion device 24 are reflected to the homogenization device 26 .

The first supplementary light source 22 emits first supplementary light. The first supplementary light source 22 is a semiconductor diode or a semiconductor diode array. The semiconductor diode may be a laser diode (LD) or a light emitting diode (LED). The spectral range of the first supplementary light is different from the spectral range of the excitation light, and the spectral range of the first supplementary light is narrower than that of the subject light, so as to improve the color saturation of combined light of the subject light and the first supplementary light. Preferably, the etendue of the first supplementary light is smaller than the etendue of the receiving light.

In this embodiment, the color of the first supplementary light emitted by the first supplementary light source 22 can be set according to different requirements for the received light. For example, when there is a lack of light of a certain color in the received light, the first supplementary light It is the light of this color, for example, the first supplementary light can be red light, blue light, etc.

In this embodiment, the second light guiding component 25 is the central film of the filter 231 included in the first light guiding component 23 . The central diaphragm guides the first supplementary light emitted by the first supplementary light source 22 to the light homogenizing device 26 .

In a preferred embodiment of the present invention, the first light guiding component 23 further includes a condenser lens 232 disposed between the optical filter 231 and the light path of the uniform light device 26 . The condenser lens 232 is used for collecting the light guided by the filter 231 and converging it to the light homogenizing device 26 .

In this embodiment, the excitation light emitted by the excitation light source is guided to the wavelength converting device through the first light guiding component, and the received light emitted from the wavelength converting device is guided to the uniform light device, and the first light is guided through the second light guiding component. The first supplementary light emitted by the supplementary light source is directly guided to the uniform light device, so that the combination of the received light and the first supplementary light can be obtained through the first light guiding component and the second light guiding component, and because the first supplementary light is absorbed by the second The light guiding component is directly guided to the light homogenizing device, so that the first supplementary light is not scattered by the wavelength conversion device, thereby greatly reducing the light loss of the first supplementary light and improving the light utilization rate of the first supplementary light.

The above-mentioned light source system provided by the embodiment of the present invention will be described below with a specific example. Assuming that the excitation light emitted by the excitation light source is blue excitation light, the first supplementary light emitted by the first supplementary light source is red light, the wavelength conversion device is a reflective wavelength conversion device, and the wavelength conversion material is yellow phosphor powder, then the above light source The optical path principle of the system is as follows:

The blue excitation light is transmitted to the wavelength conversion device through the central diaphragm on the filter, the blue excitation light excites the yellow phosphor of the wavelength conversion device, and emits the yellow converted light or the yellow converted light and the unconverted blue excited light to the filter. The yellow converted light or the yellow converted light and the unconverted blue excited light emitted to the edge diaphragm of the filter are reflected by the edge diaphragm, collected and converged by the condenser lens, and then enter the uniform light device. The light in the red spectral range and the unconverted blue excitation light emitted to the central diaphragm of the filter are transmitted and lost by the central diaphragm, and the light in the green spectral range in the yellow stimulated light is absorbed by the The central diaphragm is reflected to the dodging device.

The red light emitted by the first supplementary light source sees through the central diaphragm of the optical filter to the light homogenizing device. In this way, red light can be supplemented in the received light. Since the red light is not scattered by the wavelength conversion device, it is directly transmitted to the light homogenizing device through the central diaphragm of the filter, thereby reducing the light loss of the red light and improving the light utilization rate of the red light.

Embodiment two

This embodiment provides another light source system, please refer to FIG. 4 , the difference between this light source system and the light source system shown in FIG. 2 is that the second light guiding component 25 implements light splitting and combination by using the amount of expansion. Specifically, the reflective sheet 431 with a through hole is used to replace the optical filter 231 with a central diaphragm and edge diaphragms in FIG. 2 . In this embodiment, the first light guiding component 43 includes a reflective sheet 431 having a through hole, and the second light guiding component 25 is the through hole on the reflective sheet 431 .

Wherein the size of the through hole is smaller than the size of the reflection sheet 431 . The size of the through hole can be determined according to one or more combinations of the light loss when the first supplementary light passes through the through hole, the light loss when the excitation light passes through the through hole, and the light loss when the receiving light passes through the through hole. set up. The size of the central diaphragm can be set so that the light loss amount of the first supplementary light passing through the through hole is less than a preset ratio and the light loss amount of the received light is smaller than a preset ratio. Preferably, the area of the through hole is less than 50% of the effective light spot area.

In this embodiment, the excitation light enters the wavelength conversion device through the through hole on the reflection sheet 431, and the wavelength conversion device converts the excitation light, and emits the subject light or the subject light and the unconverted excitation light to the reflector with the through hole. Sheet 431, the subject light and unconverted excitation light emitted to the through hole of the reflection sheet 431 are lost through the through hole, and the subject light and unconverted excitation light emitted to the rest of the reflection sheet are reflected to a uniform light device. The first supplementary light emitted by the first supplementary light source 22 enters the light homogenizing device through the through hole on the reflective sheet 431, so that the combined light of the received light and the first supplementary light can be obtained through the reflective sheet with the through hole, or the received light can be obtained. , Combination of the unconverted excitation light and the first supplementary light. Since the first supplementary light directly enters the light homogenizing device through the through hole on the reflection sheet 431, the light loss caused by the scattering of the first supplementary light by the wavelength conversion device is avoided, and the luminance of the first supplementary light is greatly improved. utilization rate.

Embodiment Three

This embodiment provides another light source system, as shown in FIG. 5 , the difference between this light source system and the light source system shown in FIG. 2 is that the second light guiding component implements light splitting and combination by using polarization state. Specifically: the optical filter 531 in the light source system includes a polarizer and an edge diaphragm, wherein the edge diaphragm is the same as the edge diaphragm in Embodiment 1, and the difference is that the central diaphragm of the optical filter 231 in FIG. Replaced with a polarizer.

In this embodiment, the first light guiding component 53 is a filter 531 having a polarizer and an edge film, and the second light guiding component 25 is a polarizing plate in the filter 531 . The polarizer reflects light having a first polarization state and transmits light having a second polarization state. Wherein the first polarization state is the P state and the second polarization state is the S state, or the first polarization state is the S state and the second polarization state is the P state.

The polarizer can be a polarizer for light of all wavelengths, or a polarizer for light of a specified wavelength. Wherein, the polarizer for all wavelengths of light refers to reflecting all wavelengths of light with the first polarization state and transmitting all wavelengths of light with the second polarization state. A polarizer for light of a specified wavelength refers to reflecting light of a specified wavelength with a first polarization state and transmitting light of a specified wavelength with a second polarization state. Wherein the specified wavelength specifies a wavelength range or multiple wavelength ranges may be specified. Preferably, the specified wavelength is one or both of the wavelength range of the excitation light and the wavelength range of the first supplementary light. For example, the specified wavelength can be in the wavelength range from 480nm to 620nm. At this time, the polarizer pair has a wavelength range of 480nm Light having a first polarization state to 620 nm is reflected and light having a second polarization state in the wavelength range from 480 nm to 620 nm is transmitted.

In this embodiment, when the excitation light is blue light and the polarizer is a blue light polarizer, if the light emitted by the wavelength conversion device includes unconverted blue light, the wavelength conversion device can be emitted to blue light through the blue light polarizer. A part of the unconverted blue light at the polarizer is reflected to the uniform light device for utilization, thereby improving the utilization rate of the blue light.

Embodiment Four

This embodiment provides another light source system, as shown in FIG. 6 , the difference between this light source system and the light source systems shown in FIGS. .

The second supplementary light source 67 emits second supplementary light, and the second supplementary light is guided to the light homogenizing device 26 by the second light guide member 65 . The second supplementary light source 67 is a semiconductor diode or a semiconductor diode array. The semiconductor diode may be a laser diode (LD) or a light emitting diode (LED). The spectral range of the second supplementary light is different from the spectral range of the excitation light, and the spectral range of the second supplementary light is narrower than the spectral range of the subject light, so as to improve the combination of the subject light, the first supplementary light and the second supplementary light. color saturation. Preferably, the etendue of the second supplementary light is smaller than the etendue of the receiving light.

In this embodiment, the color of the second supplementary light emitted by the second supplementary light source 67 can be set according to different requirements for combination of the subject light and the first supplementary light, for example, when the combination of the subject light and the first supplementary light When light of a certain color is lacking in the light, the second supplementary light is the light of that color, for example, the second supplementary light can be blue light, etc.

The second light guiding component 65 is the central diaphragm of the optical filter 231 in Embodiment 1, the central diaphragm transmits the excitation light, the first supplementary light and the second supplementary light and reflects the subject light or a part of the subject light or Reflect other light except excitation light, first supplementary light and second supplementary light. Alternatively, the second light guiding component 65 is a through hole on the reflective sheet 431 having a through hole in the second embodiment. Or the second light guiding component 65 is the polarizer in the filter 531 in the third embodiment, and the polarizer is a polarizer for one or more of the excitation light, the first supplementary light, and the second supplementary light , that is, the polarizer reflects the excitation light with the first polarization state, the first supplementary light and the second supplementary light, and transmits the excitation light with the second polarization state, the first supplementary light and the second supplementary light.

In this embodiment, by supplementing the second supplementary light in the combination of the receiving light and the first supplementary light, the ratio of the second supplementary light in the combination of the receiving light and the first supplementary light is increased, and the brightness of the combined light is increased. .

Embodiment five

This embodiment provides another light source system. As shown in FIG. 7, the light source system includes two light sources, respectively an excitation light source 71 and a first supplementary light source 72, and also includes a first light guiding component 73, a wavelength conversion device 74 . The second light guiding component and the light homogenizing device 76 . In this embodiment, the second light guiding component is disposed between the first light guiding component 73 and the light path of the light homogenizing device 76 . in:

The excitation light source 71 is the same as the excitation light source 21 in the first embodiment, and the wavelength conversion device 74 is also the same as the wavelength conversion device 24 in the first embodiment, which will not be repeated here.

The first light guiding member 73 guides the excitation light emitted by the excitation light source 71 to the wavelength conversion device 74 , and guides the stimulated light emitted by the wavelength conversion device 74 to the homogenization device 76 . In this embodiment, the first light guiding component 73 includes a first optical element 731 .

If the wavelength conversion device 74 is a reflective wavelength conversion device, the first optical element 731 can be arranged between the excitation light source 71 and the optical path of the wavelength conversion device 74, and the first optical element 731 transmits the excitation light and reflects the subject light or Reflect light other than excitation light.

If the wavelength conversion device 74 is a transmission wavelength conversion device, the first optical element 731 can be arranged between the optical path of the wavelength conversion device 74 and the uniform light device 76, and the first optical element 731 can be a filter that reflects the received light sheet or reflective sheet.

In another embodiment of the present invention, the first light guiding component 73 further includes a first condenser lens 732 disposed between the first optical element 731 and the light path of the light homogenizing device 76 . The first condenser lens 732 is used for collecting the light guided by the first optical element 731 and converging it to the light homogenizing device 76 .

The first supplementary light source 72 emits first supplementary light. The first supplementary light source 72 is the same as the first supplementary light source 22 in the first embodiment, and will not be repeated here.

The second light guiding part is a second optical element located between the light path of the first light guiding part 73 and the uniform light device 76, the second optical element reflects the first supplementary light and transmits the received light or part of the received light or removes the first Light other than the supplementary light is sent to the dodging device 76 . Wherein the second optical element can be a filter 751 (as shown in FIG. 7 ) that reflects the first supplementary light and transmits the received light or part of the received light or other light except the first supplementary light, or a reflector 851 ( As shown in FIG. 8 ), or the second optical element includes a reflective sheet and a fixing member (not shown in the figure) for fixing the reflective sheet, or is a polarizer or the like.

The size of the reflective sheet 851 can be set according to one or more combinations of the light loss amount when the first supplementary light passes through the reflective sheet 851 and the light loss amount when the received light passes through the reflective sheet 851 . The size of the reflective sheet 851 can be set such that the light loss amount of the first supplementary light passing through the reflective sheet 851 is less than a preset ratio and the light loss amount of the received light is smaller than a preset ratio. Preferably, the area of the reflective sheet 851 is less than 50% of the effective light spot area.

The polarizer may be a polarizer for the first supplementary light, that is, the polarizer reflects the first supplementary light with a first polarization state and transmits the first supplementary light with a second polarization state.

In this embodiment, the second light guiding component is disposed between the first light guiding component and the optical path of the dodging device, and the second light guiding component reflects the first supplementary light to the dodging device, so that the first supplementary light The converging point of the light can be located at the front end of the light entrance of the uniform light device. Compared with the existing converging intersection point of the first supplementary light located on the surface of the light entrance of the light uniform device, the relationship between the first supplementary light and the received light can be improved. Combined light is the degree of uniformity after the uniform light is uniformed by the light homogenization device.

Embodiment six

This embodiment provides another light source system, as shown in FIG. 9 , the difference between this light source system and the light source systems shown in FIGS. 7 and 8 lies in the first supplementary light source 92 . The first supplementary light source 92 includes a solid-state light emitting component and a second condenser lens (not shown). in:

The solid-state light emitting component is used to emit the first supplementary light. The solid state light emitting assembly is a single solid state light emitting device or an array of solid state light emitting devices including a plurality of solid state light emitting devices. The solid state light emitting device may be a laser diode or a light emitting diode or the like.

The second condensing lens is configured to condense the first supplementary light emitted by the solid-state light-emitting component to the second light guiding component, and the converging point of the first supplementary light is on the second light guiding component.

In this embodiment, since the intersection point of the first supplementary light is on the second light guiding component, and the second light guiding component reflects the first supplementary light to the uniform light device 76, the first supplementary light is absorbed by the second light The guide component is reflected and has a certain divergence angle before it enters the light homogenizing device 76, so that the uniformity of the combination of the first supplementary light and the received light after being homogenized by the light homogenizing device can be improved.

Preferably, the difference between the converging angle of the first supplementary light and the converging angle of the receiving light is within a preset error range. Preferably, the preset error range is within 30%. Wherein, the convergence angle of the first supplementary light refers to the convergence angle when the first supplementary light is converged to the second light guide member 75 by the second condenser lens; The angle of convergence when reaching the dodger.

In this embodiment, since the difference between the converging angle of the first supplementary light and the converging angle of the subject light is within a preset error range, the uniformity of combining the subject light and the first supplementary light can be further improved.

Preferably, the first supplementary light source 92 further includes a decoherence device (not shown in the figure), and the decoherence device performs decoherence processing on the first supplementary light emitted by the solid-state light-emitting component. The de-correlation device may be a rotating scatterer, a vibrating scatterer or the like.

In this embodiment, since the decoherence processing is performed on the first supplementary light emitted by the solid-state light-emitting component through the decoherence device, the speckle phenomenon existing in the combined light of the received light and the first supplementary light is avoided.

Embodiment seven

This embodiment provides another light source system, as shown in FIG. 10 , the difference between this light source system and the light source systems shown in FIGS. Supplementary light source 107 . The second supplementary light source 107 emits second supplementary light, and the second supplementary light is guided to the light homogenizing device 76 by the first light guiding member 103 .

The second supplementary light source 107 is a semiconductor diode or a semiconductor diode array. The semiconductor diode may be a laser diode (LD) or a light emitting diode (LED). The spectral range of the second supplementary light is different from the spectral range of the excitation light, and the spectral range of the second supplementary light is narrower than the spectral range of the subject light, so as to improve the combination of the subject light, the first supplementary light and the second supplementary light. color saturation. Preferably, the etendue of the second supplementary light is smaller than the etendue of the receiving light.

The first light guide member 103 guides the excitation light emitted by the excitation light source 71 to the wavelength conversion device 74, guides the received light emitted by the wavelength conversion device 74 to the uniform light device 76, and guides the first light emitted by the second supplementary light source 103 to the wavelength conversion device 74. The second fill light is directed to dodging device 76 . In this embodiment, the first light guiding member 103 includes a first optical fiber that transmits the excitation light and the second supplementary light and reflects the subject light or a part of the subject light or reflects light other than the excitation light and the second supplementary light. element.

In this embodiment, if the wavelength conversion device 74 is a reflective wavelength conversion device, the first optical element may be disposed between the excitation light source 71 and the optical path of the wavelength conversion device 74 . The first optical element is a filter (not shown) that transmits the excitation light and the second supplementary light and reflects the subject light or a part of the subject light or reflects other light except the second supplementary light, or the first The optical element is a filter 1031 (as shown in FIG. 10 ) with a central diaphragm and an edge diaphragm, or the first optical element is a reflector with a through hole (not shown), or has a polarizer and Filters for edge diaphragms (not shown).

The difference between the optical filter 1031 with a central diaphragm and an edge diaphragm and the optical filter with a central diaphragm and an edge diaphragm in Embodiment 5 is that the central diaphragm of the optical filter is used to transmit the excitation light and the second A diaphragm that supplements light and reflects the subject light or part of the subject light or reflects light other than the excitation light and the second supplementary light.

The polarizer can be a polarizer for the excitation light and the second supplementary light, that is, the polarizer reflects the excitation light with the first polarization state and the second supplementary light, and reflects the excitation light with the second polarization state and the second supplementary light. transmission.

If the wavelength conversion device 74 is a transmission wavelength conversion device, the first optical element can be arranged between the optical path of the wavelength conversion device 74 and the uniform light device 76, and the first optical element can transmit the second supplementary light and reflect the affected light. Laser light or a part of the subject light or a diaphragm that reflects light other than the second supplementary light, such as the first optical element that transmits the second supplementary light and reflects part of the subject light or subject light or reflects the second supplementary light A filter for light other than light, or the first optical element is a filter with a central diaphragm and an edge diaphragm, or the first optical element is a reflector with a through hole, or a polarizer and a Filters with edge diaphragms. Wherein the central diaphragm transmits the second supplementary light and reflects the received light or a part of the received light or reflects other light except the second supplementary light. The polarizer is a polarizer for the second supplementary light, that is, the polarizer reflects the second supplementary light with the first polarization state and transmits the second supplementary light with the second polarization state.

In another embodiment of the present invention, the first light guiding component 103 further includes a first condenser lens 1032 disposed between the first optical element and the light path of the light homogenizing device 76 . The first condensing lens 1032 is the same as the condensing lens 732 in the fifth embodiment, and will not be repeated here.

Embodiment eight

This embodiment provides another light source system, as shown in Fig. 11, the difference between this light source system and the light source systems shown in Figs. light source 117 . The second supplementary light source 117 emits a second supplementary light, and the second supplementary light is guided to the light homogenizing device 76 by a second light guiding component. The second supplementary light source 117 is the same as the second supplementary light source 107 in the seventh embodiment, and will not be repeated here.

The difference between the second light guiding component and the second light guiding component 75 in Embodiment 5 is that the second optical element reflects the first supplementary light and the second supplementary light to the light homogenizing device 76, and transmits the received light or part of the received light. Or other lights except the first supplementary light and the second supplementary light are sent to the uniform light device 76 .

Preferably, the light path of the second supplementary light source 117 is the same as the light path of the first supplementary light source 72, or before the first supplementary light is converged to the second light guide component by the second condenser lens, the second supplementary light source 117 emits The optical path of the second supplementary light is merged into the optical path of the first supplementary light. In this embodiment, since the optical paths of the first supplementary light and the second supplementary light are the same, the illuminance distribution formed by the first supplementary light and the second supplementary light at the end of the uniform light device 76 is close to the same, which can further improve the The uniformity of combined light of laser light, first supplementary light and second supplementary light.

In another embodiment of the present invention, the structure of the second supplementary light source 117 is the same as that of the first supplementary light source 92 in the sixth embodiment, which will not be repeated here.

The present invention also provides a projection device, which includes the light source system in any one of the above embodiments.

The above is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure made by using the description of the present invention and the contents of the accompanying drawings or directly or indirectly used in other related technical fields shall be regarded as included in the scope of patent protection of the present invention.

Claims (14)

1. A light source system, characterized in that it comprises an excitation light source, a first supplementary light source, a first optical element, a wavelength conversion device, a second optical element, a first condenser lens, a second condenser lens and a homogenizing device ,in: The excitation light source is used to emit excitation light; The first supplementary light source is used to emit first supplementary light; the first optical element is configured to direct the excitation light to the wavelength conversion device; The wavelength conversion device is used to convert the excitation light into the subject light, and emit the subject light to the first optical element; The first optical element is also used to guide the subject light, so that the outgoing side of the subject light from the first optical element is different from the incident side of the excitation light incident on the first optical element; The first condenser lens is used to collect and converge the received light guided by the first optical element; The second optical element is arranged on the optical path after the received light exits from the first optical element; The second condensing lens is used for converging the first supplementary light emitted by the first supplementary light source to the second optical element; The second optical element is used to guide the first supplementary light, or guide the first supplementary light and at least part of the subject light, so that the first supplementary light and at least part of the subject light emerge from the same The channel exits; the light homogenizing device is located on the exit channel; The difference between the converging angle of the first supplementary light and the converging angle of the received light is within a preset error range; wherein the converging angle of the first supplementary light means that the second condensing lens combines the first The converging angle of the supplementary light converging to the second optical element; the converging angle of the subject light refers to the converging angle of the subject light converging to the light homogenizing device. 2. The light source system according to claim 1, wherein the excitation light source is a semiconductor diode or a semiconductor diode array. 3. The light source system according to claim 1, wherein the excitation light is blue light, purple light or ultraviolet light. 4. The light source system according to claim 1, wherein the first supplementary light source is a semiconductor diode or a semiconductor diode array. 5. The light source system according to claim 2 or 4, wherein the semiconductor diode is a laser diode or a light emitting diode. 6. The light source system according to claim 1, wherein the first supplementary light is blue light, or the first supplementary light is red light. 7. The light source system according to claim 1, wherein the wavelength conversion device comprises a wavelength conversion material, and the wavelength conversion material is a yellow phosphor. 8. The light source system according to claim 1, wherein the first optical element transmits the exciting light and reflects at least part of the stimulated light. 9. The light source system according to claim 1, wherein the second optical element reflects the first supplementary light and transmits at least part of the stimulated light. 10 . The light source system according to claim 9 , wherein the second optical element is a filter that reflects the first supplementary light and transmits at least part of the received light. 11 . 11. The light source system according to claim 9, wherein the second optical element comprises a reflective sheet, and the reflective sheet reflects at least part of the first supplementary light to the exit channel, and at least part of the received light The laser light is not reflected by the reflective sheet and exits to the exit channel. 12. The light source system according to claim 11, wherein the first supplementary light source comprises a solid-state light emitting component and a second condenser lens, wherein: The solid-state light-emitting component is used to emit the first supplementary light; The second condensing lens is used to condense the first supplementary light emitted by the solid-state light emitting component to the second optical element, and the converging point of the first supplementary light is on the second optical element. 13. The light source system according to claim 1, wherein the etendue of the first supplementary light is smaller than the etendue of the receiving light. 14. A projection device, characterized in that the projection device comprises the light source system according to any one of claims 1 to 13.