WO2018095019A1

WO2018095019A1 - Light source system, projection system and lighting device

Info

Publication number: WO2018095019A1
Application number: PCT/CN2017/088621
Authority: WO
Inventors: 郭祖强; 金建培; 李屹
Original assignee: 深圳市光峰光电技术有限公司
Priority date: 2016-11-25
Filing date: 2017-06-16
Publication date: 2018-05-31
Also published as: CN108107658A; CN108107658B

Abstract

Provided is a light source system, a projection system and a lighting device. The light source system comprises: a solid state light source (10) emitting at least a first excitation light; a first wavelength conversion device (40) comprising a first surface for receiving the first excitation light, converting the same into a first excited light and reflecting the same; and a first light collecting system (50) that condenses the first excitation light to the first surface and guides the first excited light to a light exit path of the light source system. On a side of the first light collecting system (50) near the first wavelength conversion device (40) , a focal point of the first light collection system (50) corresponding to the wavelength of the first excitation light is the first focal point, and a focal point corresponding to the wavelength of the first excited light is a second focal point. The midpoint of connection between the first focal point and the second focal point is a first standard position, and the first surface of the first wavelength conversion device (40) is disposed at a position deviated from the first standard position by no more than 30% the spacing between the first standard position and the first light collection system (50), thereby obtaining a light source system that is easy to mount and has good light consistency.

Description

Light source system, projection system and lighting device

Technical field

The present invention relates to the field of light source technologies, and in particular, to a light source system, a projection system to which the light source system is applied, and a lighting device to which the light source system is applied.

Background technique

With the continuous development of optical technology, there is an increasing demand for the brightness and consistency of the light emitted by the light source. The light source in the conventional projector's light source system mainly uses a halogen lamp and a high-pressure mercury lamp, and this light source has been gradually eliminated due to its short service life, low luminous efficiency, large heat generation, and poor color rendering effect.

technical problem

At present, due to the excellent monochromaticity of the laser, projectors with high quality requirements for color are increasingly using semiconductor lasers as light sources (such as blue lasers and ultraviolet lasers), and laser fluorescence technology is used to obtain colored light. (such as the use of green phosphors, yellow phosphors, etc.). This light source has a long life, but when installing the light source system, due to the technical bias in the optical design, the optical component must be completely in accordance with the strict optical position setting, so that the wavelength conversion device must be installed at a specific position, which requires more The calibration is calibrated, making the installation process cumbersome.

Technical solution

The main object of the present invention is to provide a light source system, which aims to obtain a light source system with convenient installation and good light consistency.

To achieve the above object, a light source system according to the present invention includes a solid-state light source that emits excitation light, the excitation light emitted by the solid-state light source includes at least a first excitation light, and the first wavelength conversion device includes a first surface, the first The surface receives the first excitation light, converts it into a first received laser light, and reflects the first received laser light; the first light collecting system, the light disposed between the excitation light source and the first wavelength conversion device On the road, concentrating the first excitation light to a first surface of the first wavelength conversion device, and guiding the first laser light to a light exit path of the light source system; and the first light collection a system is adjacent to a side of the first wavelength conversion device, a focus of the first light collection system corresponding to a wavelength of the first excitation light is a first focus, and the first light collection system corresponds to the first laser received The focus of the wavelength is the second focus, the intermediate position of the first focus and the second focus is the first standard position, and the first surface of the first wavelength conversion device is disposed offset from the first standard The distance is not more than 30% of the standard position and the first position of the first light collection system pitch.

Optionally, a light splitting device is disposed on the optical path between the solid state light source and the first light collecting system, and partially transmits the excitation light emitted by the solid state light source to form the first excitation light, and partially reflects to form a second excitation Light; a scattering reflection device that receives the second excitation light reflected by the spectroscopic device, converts the second excitation light into a second light having a different light intensity distribution, and reflects the second light back to the spectroscopic device.

Optionally, a light splitting device is further disposed on the optical path between the solid state light source and the first light collecting system, and partially transmits the excitation light emitted by the solid state light source to form the first excitation light, and partially reflects to form a second excitation a second wavelength conversion device comprising a second surface, the second surface receiving a second excitation light, being excited by the second excitation light to generate a second received laser light, and reflecting the second received laser light; and the second light a collecting system, on an optical path between the second wavelength converting device and the beam splitting device, concentrating the second excitation light to a second surface of the second wavelength converting device, and the first laser receiving After collecting, guiding to the spectroscopic device, the second light collecting system is close to a side of the second wavelength converting device, and the second light collecting system has a focus corresponding to a wavelength of the second excitation light is a third a focus, a focus of the second light collecting system corresponding to the wavelength of the second laser beam is a fourth focus, and an intermediate position of the third focus and the fourth focus line is a second standard position, the second wavelength conversion device A second surface disposed substantially normal to the second position.

Optionally, the first surface of the first wavelength conversion device is disposed between the first focus and the second focus.

Optionally, a shortest distance between the first standard position and the first light collecting system is d, and a distance of the first wavelength converting device from the first standard position is 0.1 d or less.

Optionally, the ratio of the first excitation light to the excitation light emitted by the solid state light source is 75% to 85%.

Optionally, the solid state light source is a blue light source, the first wavelength conversion device is a yellow fluorescent color wheel, and the first light collecting system is a focusing lens.

Optionally, a light shaping device is further disposed on the optical path between the solid state light source and the light splitting device, and the compression lens device and the glass light homogenizing device are sequentially arranged along the optical path.

Optionally, the spectroscopic device comprises two or more transparent glass sheets arranged at intervals.

Another object of the present invention is to provide a projection system including a light source system, a optomechanical system, a projection lens, and a projection screen, the optomechanical system receiving light emitted by the light source system and converting the projection light into a projection lens to project through the projection lens To the projection screen, the light source system is the light source system described above.

It is still another object of the present invention to provide a lighting device including a light source system and a housing, the light source system being mounted to the housing, and the light source system being the light source system described above.

Beneficial effect

In the technical solution of the present invention, the first wavelength conversion device in the light source system receives the first excitation light and transmits the first received laser light through the first light collection system, and the installation position of the first wavelength conversion device may be the first excitation light The focus of the convergence of a light collecting system and the first position of the first focus connected by the laser at the first light collecting system, that is, the first standard position, may also be installed at a position adjacent to the first standard position, that is, deviating from the first standard. The distance of the position is not greater than the position of the first standard position and the distance of the first light collecting system by 30%, and the installation of the two types of positions does not affect the luminous flux of the final outgoing light, and can maintain good light uniformity and overcome the habit. Some wavelength conversion devices must be set to the technical bias of the focus of the light collection system. Further, when the first wavelength conversion device is mounted and fixed, a wide range selection can be made, thereby facilitating installation and improving efficiency.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and those skilled in the art can obtain other drawings according to the structures shown in the drawings without any creative work.

1 is a schematic view of an optical path of an embodiment of a light source system according to the present invention;

2 is a positional relationship diagram of a light collecting system and a wavelength conversion device in the light source system shown in FIG. 1;

Figure 3 is a diagram showing the relationship between the mounting position of the wavelength conversion device and the luminous flux of the laser beam;

4 is a schematic diagram of an optical path of another embodiment of a light source system according to the present invention;

5 is a schematic diagram of an optical path of still another embodiment of a light source system according to the present invention;

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

Description of the reference numerals:

标号 Label	名称 name	标号 Label	名称 name
100 100	光源系统 Light source system	60 60	光整形装置 Light shaping device
10 10	固态光源 Solid state light source	61 61	压缩透镜装置 Compression lens device
20 20	分光装置 Spectroscopic device	611 611	凸透镜 Convex lens
30 30	散射反射装置 Scattering reflector	613 613	凹透镜 concave lens
40 40	第一波长转换装置 First wavelength conversion device	63 63	玻璃匀光装置 Glass homogenizing device
40b 40b	第一波长转换装置 First wavelength conversion device	200 200	光机系统 Optical system
40c 40c	第一波长转换装置 First wavelength conversion device	300 300	投影镜头 Projection lens
50 50	第一光收集系统 First light collection system	400 400	投影屏幕 Projection screen
50a 50a	第二光收集系统 Second light collection system	90 90	第二固态光源 Second solid state light source
70 70	第二波长转换装置 Second wavelength conversion device

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

BEST MODE FOR CARRYING OUT THE INVENTION

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In addition, the descriptions of "first", "second", and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the term "riveting" is used unless otherwise specifically stated and defined. "Connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" may be a fixed connection, or may be a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, It may also be indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship of two elements unless explicitly defined otherwise. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In addition, the technical solutions between the various embodiments of the present invention may be combined with each other, but must be based on the realization of those skilled in the art, and the combination of technical solutions should be considered when the combination of technical solutions is contradictory or impossible to implement. It does not exist and is not within the scope of protection required by the present invention.

The present invention provides a light source system 100.

Referring to FIG. 1, in an embodiment of the invention, a light source system 100 includes a solid-state light source 10 that emits excitation light. The excitation light emitted by the solid-state light source 10 includes at least a first excitation light. The first wavelength conversion device 40 includes a first surface. The first surface receives the first excitation light, converts it into a first received laser light, and reflects the first received laser light. The first light collecting system 50 is disposed between the excitation light source 10 and the first wavelength conversion device 40. On the optical path, the first excitation light is concentrated to the first surface of the first wavelength conversion device 40, and the first laser is collected and guided to the light exit path of the light source system 100, and the first light collection system 50 is close to the first wavelength. On one side of the conversion device 40, the first light collection system 50 corresponds to the first focus of the wavelength of the first excitation light, and the first light collection system 50 corresponds to the focus of the first laser-received light as the second focus, the first focus. The intermediate position connected to the second focus is a first standard position, and the first surface of the first wavelength conversion device 40 is disposed substantially at the first standard position. The wavelength conversion device 40 is mounted to a standard position; or the wavelength conversion device 40 is mounted adjacent to the first standard position. It can be understood that the first surface may be disposed perpendicular to the main optical axis direction of the first excitation light, and the first surface may also be disposed obliquely to the main optical axis direction of the first excitation light, and the first surface receives the position of the first excitation light (ie, The spot of the first excitation light on the first wavelength conversion device is disposed substantially at the first standard position.

In one embodiment, the solid state light source 10 can be a laser source, or a laser diode source, or a source of laser diode arrays. In another embodiment, the solid state light source can also be a light source composed of an LED light source or an array of light emitting diodes.

In one embodiment, the first wavelength conversion device 40 is a reflective wavelength conversion device including a wavelength conversion layer (not shown) and a reflective layer (not shown), wherein the reflective layer is disposed at the first wavelength The conversion device 40 faces away from the side of the solid state light source 10. The wavelength conversion layer absorbs the first excitation light and converts it into a laser light having a wavelength different from that of the first excitation light, and the first excitation light and the received laser light that are not absorbed are both reflected by the reflective layer. In one embodiment, the wavelength converting material comprises a phosphor, a phosphor material, and a quantum dot luminescent material, and the wavelength converting material may also be a fluorescent ceramic. It can be understood that in other embodiments of the present invention, the wavelength conversion layer and the reflective layer may also be a composite layer or a mixed layer, and the wavelength conversion material and the reflective material may be mixedly distributed in the layer.

In one embodiment, the solid state light source 10 is a blue light source and the first wavelength conversion device 40 is a yellow fluorescent pink wheel. The first excitation light is blue light, and the first received laser light is yellow light.

In one embodiment, the first light collecting system 50 can be a focusing lens for concentrating the first excitation light to the first surface of the first wavelength conversion device 40 such that the light beam incident on the first wavelength conversion device 40 is A larger beam section is converted into a small spot, and the laser light emitted from the wavelength converting material of the small spot irradiation area is more easily collected by the first light collecting system 50 to obtain approximately parallel light, and is applied to the subsequent optical system. in. The first excitation light (blue light) and the first received laser light (yellow light) have different refractive indices for the first light collecting system 50 due to the different frequencies of the light, and the corresponding focus is on the first light collecting system 50, that is, the focusing lens. The position is also different, and the focus position of the yellow light is farther away from the position of the focus lens than the blue light.

In addition, as shown in FIG. 1, the light source system 100 may further include a light splitting device 20 on an optical path between the solid state light source 10 and the first light collecting system 50 for transmitting the excitation light emitted by the solid state light source 10 to form a first An excitation light is partially reflected to form a second excitation light.

The light source system 100 further includes a scattering reflection device 30 located on the optical path of the second excitation light, receiving the second excitation light reflected by the beam splitting device 20, converting the second excitation light into a second light having a different light intensity distribution, and The two lights are reflected back to the spectroscopic device 20. After the second excitation light from the spectroscopic device 20 is incident on the scattering reflection device 30 via the second light collecting device 50a, the light distribution is changed by the scattering reflection device 30, and the second excitation light of the original Gaussian distribution is changed to the Lambertian distribution. The two lights can improve the uniformity of the light while decohering the second excitation light so that the emitted light is less likely to cause speckle. The scattering reflection device 30 includes a layer of scattering material, which may be composed of scattering particles having a particle size close to the wavelength of the second excitation light, and scattering and reflecting the second excitation light. The scattering reflection device 30 converts the second excitation light into the second light, and reflects the second light back to the beam splitting device 20, and the second light is combined with the first received laser light to form a final exiting white light. In application, the blue light required for white light is less than that of yellow light, so when the ratio of the first excitation light to the excitation light emitted by the solid-state light source 10 is 75% to 85%, the color of the finally emitted white light can be made more uniform. It should be noted that the "second excitation light" does not necessarily represent that the light participates in the excitation of light, and is merely convenient for description.

In one embodiment, the light splitting device 20 may be one or more transparent plates, and the region that reflects the excitation light and transmits the excitation light may be the same region, and the first excitation light and the second light formed by the excitation light after being transmitted and reflected. The spectral characteristics of the excitation light are not changed. The principle is that the incident light is incident on the surface of the transparent plate and the refraction and reflection occur simultaneously, wherein the refracted light is further transmitted through the transparent plate to form the first excitation light, and the reflected light forms the second excitation light. As the number of transparent plates increases, the proportion of light in the reflecting portion gradually increases. Alternatively, the spectroscopic device 20 includes two or more transparent glass sheets (not shown) that are stacked one above another. In another embodiment, the beam splitting device 20 includes a transparent glass sheet, and the light beam is reflected and refracted on the surface of each transparent glass sheet. The light splitting device 20 does not select the reflection transmission according to the wavelength characteristic, nor does it pass through the light splitting device. Different regions of 20 are achieved by different transmissions. The spectroscopic device 20 is provided with two or more transparent glass sheets. As the number of transparent glass sheets increases, the function of partial reflection can be superimposed, and the reflected excitation light is increased, so that the first excitation light and the second excitation can be adjusted. Light ratio. In addition, the transparent glass sheets are stacked at intervals, and when the light beam is incident from one transparent glass sheet to the other transparent glass sheet, the refractive index of the interface between the two transparent glass sheets can be different, thereby causing refraction and reflection phenomenon, which is greatly improved. The spectral efficiency of the spectroscopic device 20 is obtained.

In still another embodiment, in order to enhance the spectroscopic effect, the spectroscopic device 20 further includes a filter film (not shown) facing the first wavelength conversion device of a transparent glass sheet closest to the first wavelength conversion device 40. At the surface of 40, the filter film transmits the first excitation light and is reflected by the laser light. In this embodiment, the filter film is used to improve the utilization of light. When the first excitation light is incident on the spectroscopic device 20, the filter film can transmit the first excitation light, so that more first excitation light is incident on the first wavelength. Conversion device 40. At the same time, when the laser light is directed to the spectroscopic device 20, the filter film can also reflect the laser light and direct it to the optomechanical system 200.

Of course, in still another embodiment, the spectroscopic device 20 may further include an anti-reflection film (not shown), and the anti-reflection film is located away from the first wavelength conversion device of a transparent glass sheet farthest from the first wavelength conversion device 40. 40 surface. In this embodiment, the antireflection film can improve the transmission performance of the light, and the ratio of the first excitation light to the second excitation light can be adjusted, so that the finally emitted laser light and the second light have a proper ratio, thereby controlling the white light white. balance. Of course, the anti-reflection film is not provided, and the spectroscopic device 20 can also transmit and reflect light.

In another embodiment of the present invention, the beam splitting device 20 is not a transparent plate, but a beam splitter having different regional characteristics, the beam splitter includes at least a first region and a second region, wherein the first region and the second region are opposite to the solid state light source The transmission and reflection characteristics of the excitation light emitted by 10 are different, the transmission portion forms the first excitation light, and the reflection portion forms the second excitation light.

In each of the above embodiments, the spectroscopic device 20 splits the light, the transmitting portion forms the first excitation light, and the reflecting portion forms the second excitation light. It can be understood that it is also possible to provide that the reflecting portion forms the first excitation light and the transmitting portion forms the second excitation light while correspondingly changing the position of the first wavelength conversion device 40 or the like.

As shown in FIG. 1, the light source system 100 further includes a light shaping device 60. The light shaping device 60 is located on the optical path between the solid state light source 10 and the beam splitting device 20. The compression lens device 61 and the glass are arranged in this order along the optical path. Light device 63.

In the present embodiment, the light shaping device 60 is used to trim the excitation light emitted by the solid-state light source 10 so that the excitation light incident on the spectroscopic device 20 is high and uniform. The light shaping device 60 is located on the optical path between the solid-state light source 10 and the spectroscopic device 20, and the compression lens device 61 and the glass homogenizing device 63 are arranged in this order along the optical path. The compression lens device 61 further includes a convex lens 611 and a concave lens 613. The convex lens 611 can collect the emitted excitation light beams, and then collimate through the concave lens 613, so that the cross section of the excitation light beam is compressed and reduced, and then passed through the glass. The light device 63 makes the excitation light incident to the spectroscopic device 20 more uniform. A circular spot having a small divergence angle, uniform brightness, and high brightness can be obtained by the light shaping device 60. In one embodiment, the glass homogenizing device 63 can be a diffusing sheet that only changes the light distribution of light passing therethrough without changing the main optical axis/main propagation direction of the light.

In the technical solution of the present invention, the first wavelength conversion device 40 in the light source system 100 receives the first excitation light through the first light collection system 50 and transmits the first received laser light, and the installation position of the first wavelength conversion device 40 is substantially set at a standard position. The first excitation light (ie, the blue light wavelength) may be in the middle of the focus of the light collection system 50 and the first laser light (ie, the yellow wavelength) is in the middle of the focus connection corresponding to the light collection system 50, that is, the standard position. It can be installed at a position adjacent to the standard position, that is, the distance from the first standard position is not greater than the position where the first standard position is 30% of the distance between the first light collecting system, and the positional installation of the two types does not affect the final light source system 100. The luminous flux of the exiting light maintains good light uniformity, overcoming the technical bias that conventional wavelength conversion devices must set at the focus position of the light collecting system. Further, when the first wavelength conversion device 40 is mounted and fixed, a wide range selection is possible, which facilitates installation and improves efficiency.

The principles of the invention are further described below.

Referring to FIG. 1 and FIG. 2, the light source system can maintain good light uniformity because the luminous flux L of the finally emitted light is composed of the luminous flux LY of yellow light and the luminous flux LB of blue light, that is, L total light = LY+ LB. Among them, the luminous flux LY of yellow light is determined by the product of the collection efficiency δY of yellow light, the optical efficiency ηY of yellow light, and the luminous efficiency LY, that is, LY=δYηYLY; the luminous flux LB of blue light is the collection efficiency δB and blue light of blue light. The product of the optical machine efficiency ηB and the reflection efficiency LB is determined, that is, LB = δBηBLB.

For the blue light and the blue light, respectively, for the blue light, since the scattering reflection device 30 does not perform wavelength conversion, the heat generation itself is small, and the fixed installation manner can be adopted, and the functional structural members of the scattering reflection device 30 are easy to process, and the The consistency is good, so the reflection efficiency, collection efficiency, and optical machine efficiency can all ensure consistency, that is, the consistency of LB is good. For yellow light, the wavelength conversion layer is generally fabricated by sintering, bonding, etc., and the process is complicated, which determines that the consistency of the product is inferior to that of the scattering reflection device 30, and the thickness of the wavelength conversion layer of different light source systems is inconsistent, resulting in The position at which the first wavelength conversion device 40 actually receives light is inconsistent; and the first wavelength conversion device 40 is generally moved relative to the light source under the driving of one driving device, and the vibration during the movement and the optical axis can be combined with the first wavelength conversion device 40. The verticality of the surface determines the consistency of the position of the actual received light of the first wavelength conversion device 40 is not good. Therefore, the present invention can ensure that the light source system is out even if the first surface of the first wavelength conversion device 40 is substantially disposed at the first standard position, even if the material consistency of the first wavelength conversion device 40 and the mounting position are not consistent. Uniformity of illumination.

When the first wavelength conversion device 40 is mounted between the first standard position and the position of the first focus FB, it is the first wavelength conversion device 40b in FIG. Since the first wavelength conversion device 40b is closer to the first light collection system 50, the light emitted by the first wavelength conversion device 40b is more collected by the first light collection system 50, so that the collection efficiency δY of the first light collection system 50 is changed. Large; at the same time, the spot of the first excitation light on the first wavelength conversion device 40b becomes larger, so that the luminous efficiency LY of the yellow light becomes larger; since the yellow light at the FY position forms parallel light after passing through the first light collecting system 50, A wavelength conversion device 40b, after the yellow light passes through the first light collecting system 50, the light beam is slightly diverged, and the divergence angle θY of the yellow light is also increased, wherein the yellow light of the large divergence angle is in the subsequent optical path (such as the position of the fly-eye lens of the optical machine) It will not be able to be released into the optical path, resulting in a decrease in the utilization rate of yellow light, resulting in a decrease in the efficiency ηY of the optical machine. Considering the collection efficiency δY, luminous efficiency LY and optical machine efficiency ηY, the increase and decrease of the luminous flux LY of the yellow light remain unchanged, so that the final L total light remains unchanged.

Accordingly, when the first wavelength conversion device 40 is mounted between the first standard position and the position of the second focus FY, it is the first wavelength conversion device 40c in FIG. Since the first wavelength conversion device 40c is far from the first light collection system 50, the collection efficiency δY of the first light collection system 50 becomes smaller with respect to the first standard position; the second excitation light is on the first wavelength conversion device 40. The light spot becomes smaller, so that the luminous efficiency LY of the yellow light becomes smaller; the divergence angle θY of the yellow light also becomes smaller with respect to the first standard position, so that the utilization rate of the yellow light in the subsequent optical path is increased, resulting in an increase in the efficiency of the optical machine ηY. . Considering the collection efficiency δY, luminous efficiency LY and optomechanical efficiency ηY, two reductions and one increase, the influence of luminous efficiency LY is small (the spot size becomes small and the excitation optical density increases), and the small spot is easier to collect than the large spot. (ie, the spot size becomes smaller to further increase the collection efficiency δY), and it is found that LY is substantially unchanged, so that the final L total light remains unchanged. Therefore, the light source system 100 of the structure can maintain good light uniformity and is convenient to install. It should be noted that the installation position of the first wavelength conversion device 40 cannot be located farther than the second focus, because the position not only decreases the light collection efficiency, but also increases the divergence angle and decreases the efficiency of the optical machine, which comprehensively causes yellow light. The luminous flux drops.

Referring to FIG. 2 and FIG. 3, in one embodiment of the present invention, the shortest distance between the first standard position and the first light collecting system 50 is d (ie, the convex point of the focusing lens facing the first wavelength converting device 40). The distance from the first standard position, the distance from the first standard position of the first wavelength conversion device 40 is less than or equal to 0.3 d (may deviate from the direction of the light collecting system 50, and may also deviate from the direction of the light collecting system 50) That is, the first wavelength conversion device 40 is disposed at a position that is offset from the first standard position by no more than 30% of the distance between the first standard position and the first light collecting system 50. In a further preferred embodiment, since the first focus and the second focus generally fall within a range in which the distance from the first standard position of the first wavelength conversion device 40 is less than or equal to 0.3 d, the first wavelength conversion device 40 is installed at the first When the focus is between the second focus, the light consistency of the light source system 100 can be made better. Further, in another embodiment of the present invention, the distance of the first wavelength conversion device 40 from the first standard position is less than or equal to 0.1 d. Under the technical solution, the consistency of the light source is further improved.

FY in FIG. 2 is the second focus, FB is the first focus, and the shortest distance between the first wavelength conversion device 40 and the first light collecting system 50 is d, and s1 is the first wavelength conversion device 40 to collect the first light. The direction of the system 50 is offset from the first standard position, and s2 is the distance that the first wavelength conversion device 40 is offset from the first standard position by the direction away from the first light collecting system 50. By precisely setting the first wavelength conversion device 40 to different positions on the shaft, the luminous flux of the yellow light is tested to obtain the luminous flux-displacement curve of FIG. The horizontal axis represents the displacement of the first wavelength conversion device 40 from the first standard position, and the vertical axis represents the luminous flux of the yellow light. The first wavelength conversion device 40 also has a certain range value deviating from the first standard position (when the standard position is set to 0, the distance deviating from the direction of the first light collecting system 50 is set to be negative, away from the first light collecting system. The direction deviation of 50 is set to be positive), so that the luminous flux of the final exit remains unchanged. If the range exceeds this range, the luminous flux of the yellow light is greatly reduced, so that the use requirement cannot be achieved. According to the experimental data, the distance s1 of the first wavelength conversion device 40 from the first standard position to the first light collecting system 50 is less than or equal to 0.3d, and the distance from the first light collecting system 50 is offset from the first standard position. S2 is less than 0.3d, and the luminous flux of the finally emitted light can be kept consistent, and both are at a high value.

In the technical solution of the present invention, it is not necessary to provide a spectroscopic device, a scattering and reflecting device and related supporting devices, and only the optical device associated with the first wavelength converting device is retained, and the light source system is used to emit a single-color laser. According to the above discussion, even if the scattering reflection device is not provided, the luminous flux of the single yellow light exiting light can maintain high consistency under the design concept of the present invention.

Referring to FIG. 4, in another embodiment, the light source system 100 further includes a beam splitting device 20, an optical path between the solid state light source 10 and the first light collecting system 50, and an excitation light portion emitted by the solid state light source 10. Transmissively forming the first excitation light and partially reflecting to form a second excitation light; the light source system 100 further includes a second wavelength conversion device 70 including a second surface, the second surface receiving the second excitation light, and being excited by the second excitation light The second laser is received and the second laser light is reflected; and the second light collecting system 50a is located on the optical path between the second wavelength converting device 70 and the light splitting device 20, and the second excitation light is concentrated to the second wavelength converting device 70. The second surface, and the first laser is collected and guided to the spectroscopic device 20, the second light collecting system 50a is adjacent to the side of the second wavelength converting device 70, and the second light collecting system 50a corresponds to the wavelength of the second excitation light. The focus is the third focus, the focus of the second light collecting system 50a corresponding to the wavelength of the second laser beam is the fourth focus, and the middle position of the third focus and the fourth focus line is the second standard position, the second wave The second surface of the switching device 70 is disposed substantially normal to the second position.

In this embodiment, the installation position of the second wavelength conversion device 70 can refer to the installation position of the first wavelength conversion device 40 in the above embodiment. That is, the second wavelength conversion device 70 is disposed at a position deviated from the second standard position by no more than 30% of the distance between the second standard position and the second light collecting system 50a. Further, the second wavelength conversion device 70 is disposed between the third focus and the fourth focus.

Likewise, for the same reason as described above, the positional setting of the second wavelength conversion device 70 also causes the luminous flux of the light emitted from the light source system 100 to have high uniformity.

In the present embodiment, the solid-state light source 10 emits ultraviolet laser light, the first wavelength conversion device 40 is a yellow wavelength conversion device, and the second wavelength conversion device 70 is a blue wavelength conversion device. It can be understood that in other embodiments, the solid-state light source 10, the first wavelength conversion device 40, and the second wavelength conversion device 70 may also be devices that emit light of other colors, for example, the solid-state light source 10 emits blue laser light, and the first wavelength conversion The device 40 emits a green laser light, and the second wavelength conversion device 70 emits red excitation light.

Referring to FIG. 5, in still another embodiment, the present embodiment uses two light sources for transmission compared to the embodiment shown in FIG. 1, wherein the spectroscopic device 20 directly transmits the exiting light of the solid-state light source 10 without reflecting it. The second solid-state light source 90 is used instead of the second wavelength conversion device 70 or the scattering reflection device 30, and the second solid-state light source 90 is used to emit the third light. After the third light is transmitted by the spectroscopic device 20, the first laser beam is combined with the first laser beam. In this embodiment, the third light and the first received laser light are combined at the spectroscopic device 20. It can be understood that in other modified embodiments, the third light may also be combined with the first received laser light at other positions.

Referring to FIG. 6, another object of the present invention is to provide a projection system including a light source system 100, a optomechanical system 200, a projection lens 300, and a projection screen 400. The optomechanical system 200 receives the light source system 100. The light, and converted into projection light, is projected through the projection lens 300 to the projection screen 400, and the light source system 100 is the above-described light source system. The projection system adopts the above-mentioned light-emitting device, and can be as small as a home micro-projection, a living room projection, as large as engineering projection and cinema projection. Since the light source system of the projection system adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are not repeatedly described herein.

Still another object of the present invention is to provide an illumination device (not shown) including a light source system 100 and a housing (not shown), the light source system 100 is mounted on a housing, and the light source system 100 is the above-described light source system . The lighting device can be applied to general lighting, such as various lamps - street lamps, searchlights, stage lights, car headlights, and can also be applied to display systems such as projectors, televisions, and the like. Since the light source system of the illuminating device adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are not repeated herein.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structural transformation, or direct/indirect use, of the present invention and the contents of the drawings are used in the inventive concept of the present invention. It is included in the scope of the patent protection of the present invention in other related technical fields.

Claims

1. A light source system comprising:

a solid-state light source that emits excitation light, the excitation light emitted by the solid-state light source includes at least a first excitation light;

a first wavelength conversion device comprising a first surface, the first surface receiving a first excitation light, converting it into a first received laser light, and reflecting the first received laser light;

a first light collecting system disposed on an optical path between the excitation light source and the first wavelength conversion device, concentrating the first excitation light to a first surface of the first wavelength conversion device, and a first light exiting path guided by the laser to the light source system;

It is characterized in that

The first light collecting system is adjacent to a side of the first wavelength converting device, and the first light collecting system corresponds to a focus of the wavelength of the first excitation light as a first focus, and the first light collecting system a focus corresponding to the wavelength of the first laser beam is a second focus, and an intermediate position of the first focus and the second focus line is a first standard position;

The first surface of the first wavelength conversion device is disposed at a position that is offset from the first standard position by no more than 30% of the first standard position and the first light collection system.

2. The light source system of claim 1 further comprising:

a light splitting device, located on an optical path between the solid state light source and the first light collecting system, and partially transmitting the excitation light emitted by the solid state light source to form the first excitation light, partially reflecting to form a second excitation light;

The scattering reflection device receives the second excitation light reflected by the spectroscopic device, converts the second excitation light into a second light having a different light intensity distribution, and reflects the second light back to the spectroscopic device.

3. The light source system of claim 1 further comprising:

a second wavelength conversion device comprising a second surface, the second surface receiving a second excitation light, being excited by the second excitation light to generate a second received laser light, and reflecting the second received laser light;

And a second light collecting system, located on an optical path between the second wavelength converting device and the beam splitting device, concentrating the second excitation light to a second surface of the second wavelength converting device, and The first laser is collected and guided to the spectroscopic device,

The second light collecting system is adjacent to a side of the second wavelength converting device, and the second light collecting system corresponds to a focus of the second excitation light as a third focus, the second light collecting system a focus corresponding to the wavelength of the second laser beam is a fourth focus, an intermediate position of the third focus and the fourth focus line is a second standard position, and a second surface of the second wavelength conversion device is substantially disposed at the The second standard position.

4. The light source system of claim 1, wherein the first surface of the first wavelength conversion device is disposed between the first focus and the second focus.

5. The light source system of claim 1 wherein a shortest distance between said first standard position and said first light collecting system is d, said first wavelength converting means being offset from said first The distance from the standard position is less than or equal to 0.1d.

6. The light source system according to claim 1, wherein the ratio of the first excitation light to the excitation light emitted by the solid state light source is 75% to 85%.

7. The light source system of claim 1 wherein said solid state light source is a blue light source, said first wavelength conversion device is a yellow fluorescent color wheel, and said first light collecting system is a focusing lens.

The light source system according to claim 2 or 3, further comprising a light shaping device, wherein the light shaping device is located on an optical path between the solid state light source and the light splitting device, and is sequentially arranged along the optical path A compression lens device and a glass homogenizer are provided.

9. A projection system, comprising: a light source system, a optomechanical system, a projection lens, and a projection screen, the optomechanical system receiving light emitted by the light source system and converting the projection light into a projection lens through the projection lens The projection screen is the light source system according to any one of claims 1 to 8.

10. A lighting device comprising a light source system and a housing, wherein the light source system is mounted to the housing, and the light source system is the light source system of any of claims 1-8.