CN114967308A - Light source system and projection display system - Google Patents

Abstract

The present application discloses a light source system and a projection display system. An excitation light source component in the light source system is used to generate excitation light; a supplementary light source component is used to generate supplementary light; a wavelength conversion device includes a runner and a scattering reflection device. It is used to convert the excitation light to generate the received laser light; the scattering and reflection device is arranged on the outer side of the runner to scatter and reflect the supplementary light; the first uniform light component is arranged on the outgoing light path of the excitation light and/or the received laser light , used to homogenize the excitation light and/or the received laser light; the second homogenization component is arranged on the outgoing light path of the excitation light and/or the supplementary light, and is used to homogenize the excitation light and/or the supplementary light; The components are arranged on the outgoing light paths of the first uniform light component and the second uniform light component, and are used to combine the light emitted by the first uniform light component and the light emitted by the second uniform light component. Through the above method, the present application can improve the uniform light effect, and the light extraction efficiency of the system is high.

Description

A light source system and projection display system

technical field

The present application relates to the field of projection technology, and in particular to a light source system and a projection display system.

Background technique

With the continuous development of projection display technology, projection display devices that can achieve a wider color gamut are favored by consumers. Using pure lasers as a display light source can meet the requirements of wide color gamut, but it has disadvantages such as high cost and serious speckle. In order to solve the above shortcomings, the Advanced Laser Phosphor Display (ALPD) technology uses a combination of laser and phosphor to generate a light source, taking into account a wide color gamut and low speckle, while reducing the cost of the light source.

However, in the existing projection display equipment with a laser fluorescent light source, the laser light and the fluorescent light are first combined by the extension amount/wavelength or polarization difference, and then share the same set of uniform light devices and are finally relayed to the display chip. In the method, the laser passes through many optical elements in the process from the outlet to the display chip, and the transmission efficiency is low. In addition, the etendue design of the homogenizing device based on fluorescence seriously dilutes the etendue of the laser, which eventually makes the illumination light cone angle of the laser on the display chip larger, which reduces the efficiency of the laser illumination light exiting the lens. In addition, since the homogenizing device is designed based on the fluorescence with large etendue, when the laser passes through the homogenizing device, the defects of the homogenizing device itself (such as square bar seams or compound eye ridges, etc.) will be amplified, resulting in The final laser uniform light effect is poor, which affects the picture effect of the whole machine.

SUMMARY OF THE INVENTION

The present application provides a light source system and a projection display system, which can enhance the uniform light effect, and the system has high light extraction efficiency.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present application is to provide a light source system, the light source system includes: an excitation light source assembly, a supplementary light source assembly, a wavelength conversion device, a first uniform light component, a second uniform light component, and a combined light source. The light component, the excitation light source component is used to generate the excitation light; the supplementary light source component is used to generate the supplementary light; the wavelength conversion device is arranged on the outgoing light path of the excitation light and the supplementary light, and includes a rotating wheel and a scattering reflection device, and the rotating wheel is used for the excitation light. The light is converted to generate the received laser light; the scattering and reflection device is arranged on the outer side of the runner to scatter and reflect the supplementary light; the first uniform light component is arranged on the outgoing light path of the excitation light and/or the received laser light, and is used for scattering and reflecting the supplementary light. The excitation light and/or the received laser light are homogenized; the second homogenization component is arranged on the outgoing light path of the excitation light and/or the supplementary light, and is used for homogenizing the excitation light and/or the supplementary light; the light combining component is arranged in the The outgoing light paths of the first uniform light component and the second uniform light component are used to combine the light emitted by the first uniform light component and the light emitted by the second uniform light component.

In order to solve the above technical problems, another technical solution adopted in the present application is to provide a projection display system, the projection display system includes a light source system and an imaging system, the light source system is used to generate light source light, and the imaging system is arranged at the output of the light source system. The light-emitting path is used to modulate and project the light of the light source, wherein the light source system is the light source system in the above technical solution.

Through the above solution, the beneficial effects of the present application are: the light source system provided by the present application includes an excitation light source component, a supplementary light source component, a wavelength conversion device, a first uniform light component, a second uniform light component and a light combining component, and the excitation light source component It can be used to generate excitation light, and the excitation light is incident on the wavelength conversion device, so that the wavelength conversion device generates received laser light; the supplementary light source component can generate supplementary light, and the supplementary light, the received laser light and the excitation light form the final light emitted by the light source system, which is received by the laser light and the excitation light. The supplementary light passes through the independent uniform light components for uniform light, and after passing through the independent uniform light components, it is incident on the light combining components for light combining; There are fewer optical elements passing through the light method, the efficiency of reaching the light combining component is higher, and the efficiency of the supplementary light is higher; at the same time, when the supplementary light passes through the independent uniform light component, the defects of the uniform light component itself will not be amplified, so that the The uniform light effect of the supplementary light is good, and the stability is strong; because the supplementary light has high transmission efficiency and light extraction efficiency, the number of components in the supplementary light source can be reduced, and the cost of the whole machine can be reduced, and the light extraction efficiency of the supplementary light is high. , which can improve the light extraction efficiency of the system.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort. in:

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

2 is a schematic structural diagram of a wavelength conversion device provided by the application;

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

Fig. 4 is the structural representation of a kind of color wheel on the rotating wheel in the wavelength conversion device provided by the application;

5 is a schematic structural diagram of a regional diaphragm provided by the present application;

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

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

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

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

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

FIG. 11 is a schematic structural diagram of an embodiment of a projection display system provided by the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the prior art, the light source is often combined and then homogenized (that is, the laser fluorescence is combined and then passed through the same uniform light device) to process the illumination light. However, the light source efficiency of this method is low, and the cost is relatively high. high. In order to improve the overall efficiency and cost of the laser fluorescence light source, the present application provides a new opto-mechanical light combining method of laser fluorescence (that is, after the fluorescence and red and green lasers are homogenized by independent homogenizing devices, they are combined by the photo-synthesis device. The light is then irradiated on the display chip), thereby improving the transmission efficiency of the laser and realizing high-efficiency, low-cost, and wide-color gamut projection display. The specific implementation scheme will be described below.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a first embodiment of a light source system provided by the present application. The light source system includes: an excitation light source assembly 10, a supplementary light source assembly 20, a wavelength conversion device 30, a first uniform light assembly 40, a second The uniform light component 50 and the light combining component 60 are provided.

The excitation light source assembly 10 is used to generate excitation light. The excitation light source assembly 10 includes a laser (not shown in the figure), and the laser is used to emit excitation light. The excitation light can have a wavelength range of 440-470 nm. The excitation light source assembly 10 is also provided with There is a device for homogenizing the excitation light (not shown in the figure), and the homogenizing device can be a single compound eye, a double compound eye, a scattering sheet or other devices with a homogenizing function.

The supplementary light source component 20 is used to generate supplementary light, and the supplementary light can be a laser, such as: red laser, green laser or blue laser, that is, the supplementary light source component 20 can be a red laser, a green laser or a blue laser (not shown in the figure) one or more of.

The wavelength conversion device 30 is arranged on the outgoing light path of the excitation light and the supplementary light. As shown in FIG. 2 , the wavelength conversion device 30 includes a runner 31 and a scattering reflection device 32. The runner 31 is used to convert the excitation light to generate the received laser light. Specifically, phosphor powder is disposed on the light-bearing plane of the runner 31, and the phosphor powder can generate received laser light under the excitation of excitation light, and the received laser light can be fluorescent light.

The scattering reflection device 32 is arranged on the outer side of the runner 31, and the scattering reflection device 32 is used to scatter and reflect the supplementary light; specifically, the scattering reflection device 32 may have an inclined surface, the inclined surface may be a solid structure, and the surface is plated with scattering The specific material properties of the material and the reflective material can be set according to the characteristics of the supplementary light, or a hollow structure can be used, that is, only one layer of inclined surface is provided, as long as the structural stability is ensured. In this embodiment, the supplementary light is incident on the inclined surface, and is reflected by the inclined surface to the second homogenizing component 50. The scattering reflection device 32 may be a scattering sheet. In this embodiment, the angle between the inclined surface and the supplementary light may be 0-90°, as long as the inclined surface can scatter and reflect the supplementary light and then make normal incidence to the second uniform light component. In this embodiment, the angle between the inclined surface and the supplementary light is 45°. In this case, The second homogenizing component has the best homogenizing effect.

The first homogenizing component 40 is arranged on the outgoing light path of the excitation light and/or the received laser light, and is used for homogenizing the excitation light and/or the received laser light; specifically, the first homogenizing component 40 can be a square rod or a compound eye The first homogenizing component 40 can perform homogenization processing on the excitation light emitted from the excitation light source assembly 10 , the received laser light emitted from the wavelength conversion device 30 or the excitation light emitted from the wavelength conversion device 30 .

The second homogenizing component 50 is disposed on the outgoing light path of the excitation light and/or the supplementary light, and is used to homogenize the excitation light and/or the supplementary light; specifically, the second homogenizing component 50 may be a square rod or a compound eye , the second homogenizing component 50 can perform homogenization processing on the excitation light emitted from the excitation light source component 10 , the excitation light transmitted from the wavelength conversion device 30 or the supplementary light emitted from the supplementary light source component 20 . For example, the first homogenizing assembly 40 homogenizes the excitation light and the received laser light, and the second homogenizing assembly 50 homogenizes the supplementary light; or the first homogenizing assembly 40 homogenizes the received laser light, and the second homogenizing assembly 50 homogenizes the received laser light. 50 Homogenize the excitation light and supplementary light.

The light combining component 60 is disposed on the outgoing light path of the first uniform light component 40 and the second uniform light component 50, and is used for combining the light emitted by the first uniform light component 40 and the light emitted by the second uniform light component 50. , generating synthetic light (ie, illumination light), which can be injected into a subsequent optical system (not shown in the figure) for projection display.

This embodiment provides a light source system, in which the received laser light and the supplementary light in the light source system pass through independent homogenizing components for homogenization respectively, and then enter the light combining component for light combining after passing through the independent homogenizing components; Since the supplementary light can pass through an independent uniform light component, compared with the way of combining light in the light source, there are fewer optical elements, and the transmission efficiency to the light combining component is higher, and the efficiency of supplementary light is higher; at the same time, the supplementary light passes through an independent light source. When the uniform light component is used, the defects of the uniform light component itself will not be amplified, so that the final supplementary light has a good uniform light effect and strong stability; further, due to the high transmission efficiency and light extraction efficiency of the supplementary light, it can be reduced The number of components in the supplementary light source assembly reduces the cost of the whole machine, and at the same time, due to the high light extraction efficiency of the supplementary light, the light extraction efficiency of the entire system can be improved.

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a second embodiment of a light source system provided by the present application. The light source system includes: a first uniform light component 40 , a second uniform light component 50 , an excitation light source component, a supplementary light source component, and wavelength conversion. devices and light-combining components.

The excitation light source assembly includes: a blue laser 11 , a first dichroic plate 12 , a first mirror 13 , a collection lens 14 , a second mirror 15 , a first relay lens group 16 and a second relay lens group 17 .

The blue laser 11 is used to generate the blue laser; the first dichroic plate 12 is arranged on the outgoing optical path of the blue laser and the received laser, which is used to transmit the blue laser and reflect the received laser. Specifically, the received laser may include red fluorescence and Green fluorescence, the first dichroic plate 12 can reflect red fluorescence and green fluorescence, and transmit blue laser light, in another embodiment, yellow fluorescence can be used for receiving laser light, and the first dichroic plate 12 can reflect yellow fluorescence and transmit blue laser.

The collecting lens 14 is disposed on the outgoing optical path of the blue laser emitted by the blue laser 11 , and is used for collecting the blue laser emitted by the first dichroic plate 12 and condensing the collected blue laser onto the wavelength conversion device.

The first reflecting mirror 13 is disposed on the outgoing light path of the received laser light, and is used for reflecting the received laser light to the first light leveling component 40 and reflecting the unexcited blue laser light to the first light leveling component 40 .

The second mirror 15 is used to reflect the unexcited blue laser light to the first mirror 13 .

The first relay lens group 16 is disposed on the outgoing optical paths of the received laser light and the blue laser light, and is used for collecting the received laser light reflected by the first dichroic plate 12 and the blue laser light reflected by the second reflecting mirror 15 .

The second relay lens group 17 is disposed on the outgoing optical path of the first reflecting mirror 13 , and is used for collecting the received laser light reflected by the first reflecting mirror 13 and the blue laser light reflected by the first reflecting mirror 13 .

3 and 4, the wheel 31 includes a color ring 311, and the scattering reflection device 32 is arranged on the outer side of the color ring 311; specifically, as shown in FIG. 4, the color ring 311 is provided with a wavelength conversion area 3111 and a blue light scattering reflection The region 3112, the wavelength conversion region 3111 and the blue light scattering and reflection region 3112 are arranged along the circumferential direction of the color circle 311, and the blue laser is incident on the wavelength conversion region 3111, so that the wavelength conversion region 3111 generates a received laser light, and the received laser light is emitted by the first two directions. The color plate 12 is reflected to the first reflecting mirror 13, and is reflected by the first reflecting mirror 13 and then enters the first homogenizing component 40; the blue light scattering reflection area 3112 is used to scatter the blue laser light and reflect the scattered blue laser light .

Further, the wavelength conversion region 3111 includes a red light wavelength conversion region 3111R and a green light wavelength conversion region 3111G. The red light wavelength conversion region 3111R is used for receiving blue laser light to generate red fluorescence; the green light wavelength conversion region 3111G is used for receiving blue laser light, Generate green fluorescence.

The color ring 311 is also provided with a color correction ring piece 3113, which includes a laser color correction film and a blue light color correction film 3113B arranged along the circumferential direction. The laser color correction film is used for red fluorescence and/or green color correction. Fluorescence is used for color correction, and blue color correction film 3113B is used for color correction of blue laser; further, laser color correction film includes red light color correction film 3113R and green light color correction film 3113G, and red light color correction film 3113R is used for color correction. Color correction for red fluorescence, such as filtering red fluorescence; green color correction film 3113G is used for color correction of green fluorescence.

It can be understood that the setting method of each area in the color wheel 311 is not limited to the method shown in FIG. 4 , and the devices of the inner and outer rings can be flexibly exchanged according to actual needs. The conversion area 3111, the blue light scattering and reflection area 3112 and the color correction ring 3113 are divided; for example, it can be set as: the inner circle is the color correction ring 3113, and the outer circle is the wavelength conversion area 3111 and the blue light scattering and reflection area 3112; The size can also be set as required.

Continuing to refer to FIG. 3 , the rotating wheel 31 further includes a driver 312, the driver 312 is used to carry the color wheel 311 and drive the color wheel 311 to rotate, so that the blue light scattering reflection area 3112, the green light wavelength conversion area 3111G and the red light wavelength conversion area 3111R Periodically arranged on the propagation light path of the blue laser, the driver 312 may use a motor.

The supplemental light may include red laser light and/or green laser light. The supplementary light source assembly includes: two lasers, a third mirror 23, a second dichroic plate 24, and a first positive lens 25. In some embodiments, the two lasers Including red laser 21 and/or green laser 22; two lasers are used to generate red laser and/or green laser, the red laser is reflected by the third mirror 23 to the second dichroic plate 24, and is reflected by the second dichroic plate 24 is transmitted to the scattering reflection device 32, and the green laser light is reflected by the second dichroic plate 24 to the scattering reflection device 32.

The red laser 21 is used to generate the red laser; the third reflecting mirror 23 is arranged on the outgoing light path of the red laser, which is used to reflect the red laser so as to reflect the red laser to the second dichroic plate 24, and the third reflecting mirror 23 may be a red light reflector.

The green laser 22 is used to generate the green laser; the second dichroic plate 24 reflects the green laser and transmits the red laser. The red laser light reflected by the third reflecting mirror 23 is transmitted to the scattering reflection device 32 , and the green laser light generated by the green laser 22 is reflected to the scattering reflection device 32 .

The first positive lens 25 is disposed on the outgoing light paths of the red laser and the green laser, and is used for converging the red laser transmitted by the second dichroic plate 24 and the green laser transmitted by the second dichroic plate 24 .

Continuing to refer to FIG. 3 , the light combining assembly includes: a fourth reflecting mirror 61 , a third dichroic plate 62 , a fifth reflecting mirror 63 , a second positive lens 64 , a third positive lens 65 and a fourth positive lens 66 .

The second positive lens 64 is disposed on the outgoing optical path of the received laser light and/or the excitation light, and is used for condensing the received laser light and/or the excitation light emitted from the wavelength conversion device; specifically, as shown in FIG. 3 , the second positive lens 64 is The lens 64 is disposed on the outgoing light path of the first homogenizing component 40 , and is used for condensing the light emitted from the first homogenizing component 40 and inputting the condensed light to the fourth reflecting mirror 61 .

The fourth reflector 61 is disposed on the outgoing light path of the first even light component 40, and is used for reflecting the light emitted by the first light evening component 40, so as to reflect the light emitted from the first light evening component 40 to the third and second light beams. To color chip 62.

The third positive lens 65 is disposed on the outgoing light path of the second homogenizing element 50 , and is used for condensing the light emitted from the second homogenizing element 50 and inputting the condensed light into the third dichroic plate 62 .

The third dichroic sheet 62 is disposed on the outgoing light path of the second homogenizing component 50, and is used for transmitting the light emitted by the second homogenizing component 50 and reflecting the light reflected by the fourth reflecting mirror 61; specifically Ground, the third dichroic sheet 62 can be an area film, as shown in FIG. 5 , the area film includes a central area 621 and an edge area 622, and the central area 621 is provided with anti-blue, red and green transparent coatings, The edge area 622 is provided with a coating that reflects visible light, and 623 is the approximate shape of the spot formed by the fluorescence and blue laser on the area diaphragm; when the fluorescence passes through the area diaphragm, most of the fluorescence can be reflected and enter the subsequent optical path, and some of the fluorescence can be reflected. Fluorescence is transmitted in the central region 621 and cannot be utilized by optics in subsequent optical paths. Since the edge region 622 can be configured to reflect the blue laser light, the blue laser light can be reflected by the area diaphragm substantially without damage. By reasonably setting the coating on the regional diaphragm or the coating used on the entire regional diaphragm, the etendue of the supplementary light is set to be smaller than the etendue of the received laser light, so that the etendue of the supplementary light and the received laser light are combined at the coating. On this basis, the wavelength spectrum of the supplementary light can be set to be smaller than the wavelength spectrum of the received laser light, so that the two can also combine wavelengths at the coating; In addition, polarization state combination can also be used, the polarization of supplementary light is one, and the polarization state of received laser light includes two. Therefore, by rationally setting the characteristics of the coating, for the supplementary light and the received laser light, the two can be combined only by the extension amount, or on the basis of the extension amount combination, and then further wavelength combination or/and polarization state combination can be carried out. In addition, since the homogenization is first achieved by different homogenizing devices, and then the etendue combination is performed, the homogenization component itself is Defects will not be amplified, the uniform light effect is better, the stability is stronger, and the etendue light synthesis efficiency is higher. In some embodiments, the fifth reflecting mirror 63 is disposed on the outgoing light path of the third dichroic sheet 62 for reflecting the light reflected by the third dichroic sheet 62 .

In some embodiments, the fourth positive lens 66 is disposed on the outgoing light path of the fifth reflecting mirror 63 for condensing the light reflected by the fifth reflecting mirror 63 and inputting the condensed light into the imaging system 2 .

In this embodiment, the working principle of the light source system is as follows: the blue laser 11 generates a blue laser, the blue laser is incident on the first dichroic plate 12 , and the first dichroic plate 12 can transmit the blue laser to the wavelength conversion region 3111 and the The blue light scattering reflection area 3112, that is, the blue laser light is incident on the wavelength conversion area 3111 through the first dichroic plate 12 and the collection lens 14, so that the wavelength conversion area 3111 generates received laser light. Specifically, the received laser light includes red fluorescent light and green light. Fluorescence, the driver 312 can drive the color ring 311 to rotate, so that the red light wavelength conversion region 3111R, the green light wavelength conversion region 3111G and the blue light scattering reflection region 3112 are sequentially arranged on the outgoing light path of the blue laser, thereby sequentially generating red fluorescence, green Fluorescence and blue laser light, red fluorescence and green fluorescence enter the first dichroic plate 12 through the collection lens 14, and the unexcited blue laser light enters the second mirror 15 through the collection lens 14; The fluorescence and green fluorescence are reflected to the first relay lens group 16, and the second mirror 15 reflects the blue laser light to the first relay lens group 16; the first relay lens group 16 collects the red fluorescence, green fluorescence and blue laser Then, the corresponding light is output to the first reflecting mirror 13, enters the second relay lens group 17 through the first reflecting mirror 13, passes through the second relay lens group 17 and then enters the color trimming ring 3113, from the color trimming ring 3113 is transmitted to the first homogenizing component 40, so that the above-mentioned red fluorescence, green fluorescence and blue laser light are incident on the first homogenizing component 40 for homogenizing, that is, in this embodiment, the first homogenizing component 40 can Fluorescence and green fluorescence were homogenized.

The red laser light generated by the red laser 21 can be reflected by the third mirror 23 to the second dichroic plate 24, and then transmitted to the first positive lens 25 by the second dichroic plate 24; the green laser light generated by the green laser 22 is incident on the second dichroic plate 24. The second dichroic plate 24 is reflected by the second dichroic plate 24 to the first positive lens 25; after the red laser is reflected by the third reflecting mirror 23 and combined with the green laser through the second dichroic plate 24, The first positive lens 25 and the scattering reflection device 32 are transmitted to the second homogenizing component 50; specifically, the first positive lens 25 can collect the red laser light and the green laser light, and then output the collected light to the scattering reflection device 32; The scattering reflection device 32 can disperse the red laser light and the green laser light to reduce the speckle effect. Since the scattering reflection device 32 has the function of reflection, it can reflect the red laser light and the green laser light to the second homogenizing component 50, and the second light uniformity component 50 is reflected by the second light scattering device 32 The homogenizing component 50 homogenizes the light. Compared with the existing method of using a scattering wheel, the solution provided by this embodiment only needs one motor and a rotatable color ring 311, which has a simple structure and a compact optical path. On the outside of the color ring 311, it is convenient for technicians to disassemble and replace. The technician can change the position, roughness or inclined surface angle of the scattering reflection device 32 according to the different needs of the supplementary light, and then adjust the dissipated spot degree of the supplementary light and The transmission direction makes the wavelength conversion device provided in this embodiment adaptable to different application scenarios; the red laser and the green laser are converged to the edge region 622 of the regional diaphragm through the third positive lens 65 after uniform light.

After the supplementary laser, that is, the red laser and/or the green laser, the blue laser, and the received laser, are respectively homogenized, the light is transmitted to the imaging system 2 through the light combining component for modulation and projection of the illumination light. In this embodiment, the supplementary The laser includes red supplementary laser and green supplementary laser, that is, red and green supplementary laser. The fluorescent and blue lasers establish an imaging relationship through the second positive lens 64 and the fourth positive lens 66 , and the regional diaphragm can reflect most of the fluorescent and blue lasers; the red and green supplementary lasers pass through the third positive lens 65 and the fourth positive lens 66 To establish an imaging relationship, the red and green supplementary lasers can pass through the regional diaphragm, and combine with the fluorescence through etendue to jointly image the imaging system 2, which can be a spatial light modulator.

In contrast, in the traditional laser-fluorescence combining method, the combined red and green supplementary laser and fluorescence need to pass through a homogenizing device together. In order to meet the uniformity requirements, the etendue of the laser is greatly diluted. In the opto-mechanical light combining method provided in this embodiment, the second homogenizing component 50 is separately provided for the red and green supplementary lasers, so that the etendue of the laser is less diluted, and the light spot converged on the regional diaphragm is small, so the central region The area ratio of 621 is reduced, so that the light loss through the central area 621 is reduced. Moreover, compared with the traditional light combining method, the red and green supplementary lasers pass through fewer optical elements, so the transmission efficiency of the red and green supplementary lasers is high, and the third positive lens 65 and the fourth positive lens 66 in the imaging relay optical path can be applied to narrow wavelength lasers , so the imaging effect is good, the light spot is sharp, and the overfill on the spatial light modulator is less. In addition, due to the small etendue dilution of the red and green supplementary laser light paths, the cone angle of the laser illumination light on the spatial light modulator is smaller, that is, the relative aperture (F#) of the laser illumination light is larger; considering the spatial light modulation Due to the diffraction effect of the filter, the optical-mechanical efficiency of the lens is higher than that of the fluorescent light path with a small relative aperture. To sum up, in the above photo-mechanical light combining method, the overall transmission efficiency of the red and green supplementary lasers is high, and the loss of the fluorescent area is small, which can improve the brightness of the light output or reduce the usage of the laser, thereby reducing the cost. At the same time, the filling rate of the red and green supplementary lasers is high when they pass through the homogenization components specially designed for small etendue, so that some defects/defects of the homogenization components have less influence on the final homogenization effect during the homogenization process. Therefore, the laser The uniform light effect is good and the stability is strong.

In another specific embodiment, please refer to FIG. 6. FIG. 6 is a schematic structural diagram of a third embodiment of a light source system provided by the present application. The design of the light source part of this embodiment is similar to that of the second embodiment, which is not repeated here. To reiterate, the design of the light combining assembly and the arrangement of the scattering reflection device 32 may not be limited to the solution shown in FIG. 3 .

In some embodiments, the first homogenizing component 40 includes: a first compound eye 41 and a second compound eye 42 . The first compound eye 41 is disposed on the transmission light path of the wavelength conversion device, and is used to homogenize the light transmitted by the wavelength conversion device, and emit the homogenized light to the fourth reflecting mirror 61; 41 is disposed on the outgoing light path of the second positive lens 64 , and is used to homogenize the light emitted by the second positive lens 64 and transmit the homogenized light to the fourth reflecting mirror 61 . The second fly eye 42 is disposed on the outgoing light path of the fourth reflecting mirror 61 , and is used for homogenizing the light reflected by the fourth reflecting mirror 61 , and emitting the homogenized light to the third dichroic plate 62 .

In this embodiment, the double compound eyes are used as the homogenizing device for the fluorescence and the blue laser, and the square rod is used as the homogenizing device for the red and green supplementary lasers. Compared with the use of the square rod to homogenize the fluorescence, the fluorescence can be directly focused on the wheel body. The area where the color trimmer is located does not need to be focused to the entrance of the square rod, that is, this method can reduce the size of the light spot on the color trimmer, reduce the spokes, and improve the color quality of the final display.

It is understandable that both the laser homogenizing device and the fluorescent homogenizing device can use square rods or double compound eyes, which can be a combination of square rods and double compound eyes. There are four homogenization methods in total. The laser homogenizing device that homogenizes the laser light and the fluorescence homogenizing device that homogenizes the fluorescence have different design of etendue parameters. The etendue of the light processed by the laser homogenizing device is smaller than that of the fluorescence homogenizing device. Improve the light utilization efficiency of the supplementary laser.

In another specific embodiment, please refer to FIG. 7 . FIG. 7 is a schematic structural diagram of a fourth embodiment of a light source system provided by the present application. The design of the light source part of this embodiment is similar to that of the second embodiment, which is not repeated here. To repeat, the difference is: the wavelength conversion device further includes a connecting rod 313 and a scattering ring 314, the connecting rod 313 is used to connect the scattering ring 314 and the driver 312, and the scattering reflection device 32 is arranged on the outer side of the scattering ring 314, and its working principle is the same as that of the second The embodiments are similar and will not be repeated here.

In another specific embodiment, please refer to FIG. 8 . FIG. 8 is a schematic structural diagram of a fifth embodiment of a light source system provided by the present application. This embodiment is similar to the second embodiment, except that the blue laser is incident on the scattering reflection The device 32, the scattering and reflection device 32 includes a red laser light scattering and reflection section and/or a green laser light scattering reflection section (not shown in the figure), which is used to scatter the blue laser light and transmit it to the second uniform light component 50, and the red laser light and the green laser light are scattered and reflected. /or the green laser light is scattered and then reflected to the second uniform light component 50 .

In this embodiment, a device with scattering and reflection functions is arranged in the blue light scattering and reflecting area 3112 to scatter the red fluorescence and the green fluorescence, and transmit the unexcited blue laser light to the second homogenizing component 50; understandably , the blue laser can also be set to irradiate other areas, a part of the blue laser is used to excite the phosphors on the wavelength conversion area 3111 to generate red fluorescence and green fluorescence, and the other part of the blue laser (that is, the unexcited blue laser) is transmitted through The scattering reflection device 32 enters the second light homogenizing component 50 .

The first relay lens group 16 is arranged on the outgoing light path of the received laser light, which is used to collect the received laser light; the second relay lens group 17 is arranged on the outgoing light path of the first reflecting mirror 13, which is used to The received laser light reflected by the mirror 13 is collected.

The working principle of the light source system in this embodiment is as follows: the blue laser 11 generates blue laser, the blue laser is incident on the first dichroic plate 12 , and the first dichroic plate 12 can transmit the blue laser to the collecting lens 14 , and the blue laser is collected by the first dichroic plate 12 The lens 14 enters the color ring 311, so that the color ring 311 generates received laser light, specifically, the received laser light includes red fluorescent light and green fluorescent light, and the driver 312 can drive the color ring 311 to rotate, so as to sequentially generate red fluorescent light, green fluorescent light and blue laser light , the red fluorescence and green fluorescence enter the first dichroic plate 12 through the collecting lens 14, and the unexcited blue laser light is transmitted to the second uniform light component 50 by the color ring 311; the first dichroic plate 12 combines the red fluorescence and green fluorescence The fluorescent light is reflected to the first relay lens group 16; after the first relay lens group 16 collects the red fluorescent light and the green fluorescent light, it outputs the corresponding light to the first reflecting mirror 13, and then enters the second reflecting mirror 13 after being reflected by the first reflecting mirror 13. The relay lens group 17 enters the color ring 311 after passing through the second relay lens group 17 , and is transmitted by the color ring 311 to the first homogenizing element 40 , so that the red fluorescence and green fluorescence are incident on the first homogenizing element 40 Perform homogenization, that is, in this embodiment, the first homogenizing component 40 can homogenize red fluorescence and green fluorescence, and the second homogenizing component 50 can homogenize blue laser, red laser and green laser.

In the above-mentioned embodiment, the blue laser light is reflected by the V-shaped optical path, and enters the first homogenizing component 40 together with the fluorescence, the dilution of the etendue of blue light is relatively large, and the blue light efficiency is low; this embodiment provides an improved optical path. , the blue laser is incident on the scattering reflection device 32, and the blue laser is combined with the red and green supplementary laser light through the wavelength difference and passes through the first homogenizing component 40 together, so that the efficiency of the blue light can be improved. After the red and green supplementary lasers, blue lasers and fluorescence respectively pass through the homogenizing component, the light is combined in the optical-mechanical optical path and imaged to the imaging system 2. This method can make full use of the etendue of the blue laser and improve the optical-mechanical performance of the blue laser. efficiency and overall brightness.

In other embodiments, the scattering and reflecting device 32 may also adopt a separate structure. For example, the scattering and reflecting device 32 may include a reflecting device 321 and a scattering wheel 322 , as shown in FIGS. 9-11 .

Please refer to FIG. 9. FIG. 9 is a schematic structural diagram of a sixth embodiment of a light source system provided by the present application. The design of the light source part of this embodiment is similar to that of the fourth embodiment, and its working principle is similar to that of the fourth embodiment. To repeat, the difference is: in this embodiment, the scattering and reflecting device 32 may include a reflecting device 321 and a scattering wheel 322 .

After the red and green supplementary laser light is combined, the first positive lens 25 converges to the reflection device 321, and then is reflected by the reflection device 321 to the scattering wheel 322; the scattering wheel 322 can scatter the red and green supplementary laser light to reduce speckle; specifically , the scattering wheel 322 and the color ring 311 are arranged on the same driver 312, and the scattering wheel 322 and the driver 312 are connected by a connecting rod 313, which can realize the integration of the color ring 311 and the scattering wheel 322; The complementary laser and fluorescence are combined in the optomechanical light path and delivered to the imaging system 2 .

Through the integration of the scattering wheel 322 and the color ring 311, the overall volume of the optical machine is compressed; in addition, since the scattering wheel 322 and the color ring 311 are kept in sync, corresponding scattering sheets can be separately set for the red laser and the green laser (not shown in the figure). out), that is, the method of disposing the scattering sheets in sections can further improve the etendue maintenance rate of the laser and improve the laser transmission efficiency.

Please refer to FIG. 10 . FIG. 10 is a schematic structural diagram of a seventh embodiment of a light source system provided by the present application. The design of the light source part of this embodiment is similar to that of the sixth embodiment, with the difference that: in this embodiment, the first uniform light assembly 40 The first compound eye 41 and the second compound eye 42 are included, and the working principle is similar to that of the sixth embodiment, which will not be repeated here.

Please refer to FIG. 11. FIG. 11 is a schematic structural diagram of an embodiment of a projection display system provided by the present application. The projection display system includes a light source system 1 and an imaging system 2. The light source system 1 is used to generate light source light, and the imaging system 2 is disposed in the light source system. The outgoing light path of 1 is used for modulating and projecting the light of the light source, and the light source system 1 is the light source system in the above-mentioned embodiment.

This application provides a laser fluorescent light source solution for combining light in an opto-mechanical machine, which is suitable for laser TVs, engineering machines and cinema projectors with a wide color gamut, and is suitable for the design of other laser fluorescent light sources, and can achieve wide color gamut and low cost. Compared with the way in which laser and fluorescence are combined first and pass through the same uniform light device, the light combining method proposed in this application has the following advantages:

1) High laser efficiency: The laser passes through an independent homogenization system, and the transmission efficiency is high compared to the way of combining light in the light source. The aperture is large, and compared with fluorescence, it can obtain higher efficiency through the lens; at the same time, when the laser passes through the independent homogenization system, the defects of the homogenization system itself will not be amplified, and the final laser homogenization effect is good and the stability is strong .

2) The light source light machine is compact in size: in the current light source combining method, the light combining position is located in the light source module, and a separate scattering wheel needs to be set in the laser light path to eliminate speckle, resulting in a large overall volume of the light source; while this application provides The opto-mechanical light combining method can integrate the scattering wheel to the wavelength conversion device, so that the overall structure can be more compact and the volume is smaller.

3) Low cost and high efficiency: In the opto-mechanical light combining method, due to the high transmission efficiency and light extraction efficiency of the laser, the usage of red and green lasers can be reduced and the cost of the whole machine can be reduced; at the same time, due to the high light extraction efficiency of the laser, it can be Improve the efficiency of the whole machine.

The above are only the embodiments of the present application, and are not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related technologies Fields are similarly included within the scope of patent protection of this application.

Claims (10)

1. A light source system, comprising:

an excitation light source assembly for generating excitation light;

a supplementary light source assembly for generating supplementary light;

the wavelength conversion device is arranged on an emergent light path of the exciting light and the supplementing light and comprises a rotating wheel and a scattering reflection device, and the rotating wheel is used for converting the exciting light to generate a stimulated light; the scattering and reflecting device is arranged on the outer side surface of the rotating wheel and used for scattering and reflecting the supplementary light;

the first light homogenizing assembly is arranged on an emergent light path of the excitation light and/or the stimulated light and is used for homogenizing the excitation light and/or the stimulated light;

the second light homogenizing assembly is arranged on an emergent light path of the excitation light and/or the supplement light and is used for homogenizing the excitation light and/or the supplement light;

and the light combining component is arranged on the light emitting paths of the first light homogenizing component and the second light homogenizing component and is used for combining the light emitted by the first light homogenizing component and the light emitted by the second light homogenizing component.

2. The light source system of claim 1,

the scattering and reflecting device is provided with an inclined surface which is used for scattering and reflecting the supplementary light to the second light homogenizing assembly.

3. The light source system of claim 2, wherein the wheel comprises:

the color ring is provided with a wavelength conversion region and is used for converting the exciting light to generate the stimulated light;

the driver is used for bearing the color ring and driving the color ring to rotate;

the connecting rod is used for connecting the scattering ring with the driver;

wherein the inclined surface is provided on an outer side surface of any one of the color ring, the link, or the driver.

4. The light source system of claim 3,

the complementary light comprises red laser and/or green laser, blue laser enters the scattering and reflecting device, the scattering and reflecting device comprises a red laser scattering and reflecting section and/or a green laser scattering and reflecting section, the red laser and/or the green laser is used for scattering and then transmitting the blue laser to the second dodging assembly, and the red laser and/or the green laser is scattered and then reflected to the second dodging assembly.

5. The light source system of claim 3,

the color ring is further provided with a blue light scattering and reflecting area, the blue light scattering and reflecting area and the wavelength conversion area are arranged along the circumferential direction of the color ring, and the blue light scattering and reflecting area is used for scattering blue laser and reflecting the scattered blue laser.

6. The light source system of claim 1,

the light combination assembly comprises an area diaphragm, wherein the area diaphragm comprises a central area and an edge area and is used for combining light according to the expansion difference, the wavelength or the polarization characteristic of the supplementary light and the stimulated light.

7. The light source system of claim 1,

the etendue of the light processed by the first dodging assembly is larger than that of the light processed by the second dodging assembly.

8. The light source system of claim 7,

the first dodging assembly comprises a first compound eye and a second compound eye.

9. The light source system of claim 7,

the first light homogenizing assembly and the second light homogenizing assembly are square rods.

10. A projection display system, comprising a light source system and an imaging system, wherein the light source system is configured to generate light source light, and the imaging system is disposed on an emitting light path of the light source system and configured to modulate and project the light source light, and the light source system is the light source system according to any one of claims 1 to 9.

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