CN108803214B

CN108803214B - Light source system and display device

Info

Publication number: CN108803214B
Application number: CN201710288242.9A
Authority: CN
Inventors: 郭祖强; 杜鹏; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2017-04-27
Filing date: 2017-04-27
Publication date: 2024-05-28
Anticipated expiration: 2037-04-27
Also published as: WO2018196195A1; CN108803214A

Abstract

The light source system comprises a light source device, a first light splitting and combining device, a wavelength conversion device and a light processing device, wherein the light source device emits first excitation light and second excitation light, the first excitation light has a first polarization state, the second excitation light has a second polarization state different from the first polarization state, the first light splitting and combining device comprises at least one transparent substrate, the at least one transparent substrate guides the excitation light with a first preset proportion in the second excitation light to one of the light processing device and the wavelength conversion device, and guides the other part of the excitation light with the second excitation light and the first excitation light to the other one of the light processing device and the wavelength conversion device, and the first preset proportion is matched with the number of the transparent substrates; the light processing device scatters the received excitation light and emits third excitation light; the wavelength conversion device converts the received excitation light into laser light; the third excitation light and the lasing light are also directed to the light exit channel.

Description

Light source system and display device

Technical Field

The invention relates to a light source system and a display device.

Background

At present, laser light sources are becoming more and more widely used in the fields of display (such as projection) and illumination, and have gradually replaced bulbs and LED light sources in the field of high-brightness light sources due to the advantages of high energy density and small optical expansion. In this case, a light source system that uses a first light source to excite a fluorescent powder to generate a desired light (such as blue light to excite a yellow fluorescent powder to generate white light or light with a specific color) is the main stream of applications due to the advantages of high light efficiency, good stability, low cost, and the like.

Particularly, in projection technology, the number of spatial modulators is mainly divided into a monolithic system and a three-piece system, in the monolithic system, a light source needs to provide light of three colors of RGB in time sequence for illumination, and finally, a color picture is displayed on a screen. In the three-sheet system, the light source needs to provide a white light source, and split light in the optical machine to respectively irradiate the three spatial modulators, and finally the combined light shows a color picture on the screen. In the three-sheet projection technology using laser as a light source, a white light source generated by exciting yellow fluorescent powder by using blue laser as an excitation light source is the main stream of application due to the advantages of high light efficiency, good stability, low cost and the like.

In the white light source composition, generally, a blue light and yellow light two-way form is adopted, namely, the light source is provided with two independent light paths, and finally light is combined, and the system is complex and the cost is high; in addition, the method can adopt a region coating mode, blue light is transmitted or reflected at the region coating, white light obtained by blue light and yellow light is generated after yellow fluorescent powder is excited, part of the collected white light passes through the region coating, blue light is lack in the center of the finally formed white light beam in the angular direction, and the quality of the beam can be influenced in application. Therefore, there is a need for a compact, uniform white light source that can efficiently generate white light while the white light beam has a high quality.

Referring to fig. 1, fig. 1 is a schematic diagram of an optical path structure of a light source system adopting a blue light and yellow light two-path form. When the light source system works, two groups of lasers emit blue laser, one blue laser passes through the relay system 1 and the light splitting lens which is used for transmitting blue and reflecting yellow, then is imaged on the surface of yellow fluorescent powder through the collecting lens, the blue laser excites the yellow fluorescent powder to generate yellow fluorescence, and after reflection, the blue laser is collected at the light splitting lens through the collecting lens and reflected, and the blue laser passes through the reflecting mirror in the propagation process; the other path of blue laser is emitted through the relay system 2, and the blue light and yellow fluorescence passing through the relay system 2 are combined at the position of the light splitting lens to form white light emission. The light source can obtain better white light, but the system is too complex, the volume is large, the cost is high, miniaturization is difficult to achieve, and the light utilization rate is reduced to a certain extent due to the large volume.

Referring to fig. 2 and 3, fig. 2 is a schematic view of an optical path structure of a light source system using a region membrane, and fig. 3 is a schematic view of a plane structure of the region membrane shown in fig. 2. When the light source system works, the laser emits blue laser, the blue laser reaches the region diaphragm through the relay system, the film coating in the central region of the region diaphragm is blue-reflecting and yellow-transmitting, and the edge is full-transmitting. Blue light is reflected at the central part, imaged on the surface of yellow fluorescent powder through a collecting lens, mixed light of the blue light and yellow fluorescent light is excited to be generated, the mixed light is collected through the collecting lens and then emitted, the blue light at the central part is reflected and lost when the mixed light passes through the regional membrane, finally the far field of the light beam forms distribution as shown in fig. 3, the blue light is lack at the central part, and therefore the light emission is uneven, which is unfavorable for certain application fields of white light beams.

Disclosure of Invention

In view of this, it is necessary to provide a light source system having a small size, and also to provide a display apparatus employing the light source system.

A light source system, comprising a light source device, a first light splitting and combining device, a wavelength conversion device and a light processing device, wherein the light source device is used for emitting first excitation light and second excitation light, the first excitation light has a first polarization state, the second excitation light has a second polarization state different from the first polarization state, and the ratio of luminous fluxes of the first excitation light and the second excitation light is a preset value; the first light splitting and combining device comprises at least one transparent substrate, wherein the at least one transparent substrate is used for guiding a first preset proportion of excitation light in the second excitation light to one of the light processing device and the wavelength conversion device, and guiding the other part of excitation light in the second excitation light and the first excitation light to the other one of the light processing device and the wavelength conversion device, and the first preset proportion is adaptive to the number of the transparent substrates; the light processing device is used for scattering the received excitation light and emitting third excitation light; the wavelength conversion device is used for converting the received excitation light into laser light; the third excitation light and the laser light are also guided to a light-emitting channel, and the combined light emitted from the light-emitting channel meets the preset brightness and color temperature.

A display apparatus comprising a light source system including a light source device for emitting first excitation light having a first polarization state, a first light splitting/combining device, a wavelength converting device, and a light processing device, wherein the first excitation light has a second polarization state different from the first polarization state, and a ratio of luminous fluxes of the first excitation light and the second excitation light is a preset value; the first light splitting and combining device comprises at least one transparent substrate, wherein the at least one transparent substrate is used for guiding a first preset proportion of excitation light in the second excitation light to one of the light processing device and the wavelength conversion device, and guiding the other part of excitation light in the second excitation light and the first excitation light to the other one of the light processing device and the wavelength conversion device, and the first preset proportion is adaptive to the number of the transparent substrates; the light processing device is used for scattering the received excitation light and emitting third excitation light; the wavelength conversion device is used for converting the received excitation light into laser light; the third excitation light and the laser light are also guided to a light-emitting channel, and the combined light emitted from the light-emitting channel meets the preset brightness and color temperature.

Compared with the prior art, in the light source system and the display device, the first light splitting device comprises at least one transparent substrate, the first excitation light and the second excitation light are split through the at least one transparent substrate, so that the light processing device and the wavelength conversion device respectively generate scattered excitation light and the laser for the excitation light, the scattered excitation light and the laser are finally combined in the light outlet channel, the at least one transparent substrate can split the first excitation light and the second excitation light by utilizing the transmission and reflection characteristics of light with different polarization states, the size is small, the light utilization rate is high, the phenomenon of uneven light outlet caused by regional light splitting is avoided due to uniform light splitting, the size of the light source system is small, the light utilization rate is high, the light outlet is uniform, and the display effect of the display device adopting the light source system is good.

Drawings

Fig. 1 is a schematic diagram of the light path structure of a light source system in the form of blue light and yellow light.

Fig. 2 is a schematic view of the optical path structure of a light source system employing a region membrane.

Fig. 3 is a schematic plan view of the area membrane shown in fig. 2.

Fig. 4 is a schematic structural view of a light source system according to a first embodiment of the present invention.

Fig. 5 is a schematic structural view of a first light splitting and combining device of the light source system shown in fig. 4.

Fig. 6 is a schematic structural view of a first light splitting and combining device of a light source system according to a second embodiment of the present invention.

Fig. 7 is a schematic structural view of a first light splitting and combining device of a light source system according to a third embodiment of the present invention.

Fig. 8 is a schematic structural view of a first light splitting and combining device of a light source system according to a fourth embodiment of the present invention.

Fig. 9 is a schematic structural view of a first light splitting and combining device of a light source system according to a fifth embodiment of the present invention.

Fig. 10 is a schematic structural view of a light source system according to a sixth embodiment of the present invention.

Fig. 11 is a schematic structural view of a light source system according to a seventh embodiment of the present invention.

Fig. 12 is a schematic structural view of a light source system according to an eighth embodiment of the present invention.

Fig. 13 is a schematic structural view of a light source system according to a ninth embodiment of the present invention.

Fig. 14 is a schematic structural view of a light source system according to a tenth embodiment of the present invention.

Fig. 15 is a schematic configuration diagram of a light source system according to an eleventh embodiment of the present invention.

Fig. 16 is a schematic structural view of a light source system according to a twelfth embodiment of the present invention.

Fig. 17 is a schematic structural view of a light source system according to a thirteenth embodiment of the present invention.

Fig. 18 is a schematic structural view of a light source system according to a fourteenth embodiment of the present invention.

Fig. 19 is a schematic plan view of a first light splitting and combining device of the light source system shown in fig. 18.

Fig. 20 is a schematic plan view of a first light splitting and combining device of a light source system according to a fifteenth embodiment of the present invention.

Fig. 21 is a block diagram of a display device according to a preferred embodiment of the present invention.

Description of the main reference signs

Light source systems 10, 40', 60', 70', 70", 10', 91

Light source device 100

First light splitting and combining device 104, 404, 6041, 7041, 1104'

Second light splitting and combining device 6042, 7042

Wavelength conversion device 107, 406, 1107

Light processing device 106, 405, 606, 705

Light sources 101, 401, 601, 701, 1101

First light source 101a

Second light source 101b

Light combining device 102, 402, 602, 702, 1102

Dodging devices 103, 403, 603, 703, 1103

Scattering elements 106a, 606a, 1106

Polarization conversion element 105, 405, 602, 1105

Collecting lenses 108a, 108b, 407, 608, 1108

At least one transparent substrate 104a, 604a', 1104a

Light splitting films 104b, 604b', 42

First transparent substrate 104a

Second transparent substrate 104d

Third transparent substrate 104f

Antireflection film 104e, 1104h

Guide elements 408a, 408b, 408, 7081a, 7081b, 609, 7081

Light combining elements 409, 7082a, 7082b, 6043, 7082

Supplemental light sources 501, 801a, 801b, 901

First wavelength conversion elements 6071, 7071

Second wavelength conversion element 6072, 7072

Polarization beam splitter 604g

Surface 41

First regions 41a, 41a'

Second regions 41b, 41b'

Display device 90

Optical machine system 92

Projection lens 93

The invention will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

Referring to fig. 4, fig. 4 is a schematic structural diagram of a light source system according to a first embodiment of the present invention. The light source system 10 includes a light source device 100, a first light splitting/combining device 104, a wavelength conversion device 107, and a light processing device 106.

The light source device 100 is configured to emit a first excitation light and a second excitation light, where the first excitation light has a first polarization state, and the second excitation light has a second polarization state different from the first polarization state. The ratio of the luminous fluxes of the first excitation light and the second excitation light is a preset value, and it can be understood that the preset value can be set according to actual needs.

The first light splitting and combining device comprises at least one transparent substrate, the at least one transparent substrate is used for guiding the excitation light of a first preset proportion in the second excitation light to one of the light processing device and the wavelength conversion device, and guiding the other part of the excitation light of the second excitation light and the first excitation light to the other one of the light processing device and the wavelength conversion device, and the first preset proportion is adaptive to the number of the transparent substrates. In this embodiment, the at least one transparent substrate guides (e.g., reflects) a first predetermined proportion of the excitation light of the second excitation light to the light processing device, and guides (e.g., transmits) another portion of the excitation light of the second excitation light and the first excitation light to the wavelength conversion device.

The light processing device 106 is configured to convert a part of the second excitation light into third excitation light, and the third excitation light is guided to the light-emitting channel. The third excitation light has the same polarization state as the second excitation light before being converted by the light processing means 106. The wavelength conversion device 107 is configured to convert another part of the second excitation light and the first excitation light into a laser, where the laser is guided to the light emitting channel to combine with the third excitation light, and the combined light emitted from the light emitting channel satisfies a predetermined brightness and color temperature.

Specifically, in this embodiment, the light source device 100 includes a first light source 101a, a second light source 101b, and a light combining device 102, where the first light source 101a is configured to emit the first excitation light, the second light source 102b is configured to emit the second excitation light, and the light combining device 102 transmits one of the first excitation light and the second excitation light and reflects the other of the first excitation light and the second excitation light, so that the first excitation light and the second excitation light are combined and provided to the first light splitting and combining device 104.

The first light source 102a and the second light source 102b may be semiconductor diodes or semiconductor diode arrays, such as Laser Diodes (LD) or Light Emitting Diodes (LED), etc. The first excitation light and the second excitation light are the same color excitation light, and may be blue light, violet light, ultraviolet light, or the like, but not limited thereto. In this embodiment, the first light source 102a includes a blue semiconductor laser diode for emitting blue laser light having a first polarization state as the first excitation light, and the second light source 102b also includes a blue semiconductor laser diode for emitting blue laser light having a second polarization state as the second excitation light. Wherein the first polarization state may be a P-state and the second polarization state may be an S-state. The number of the semiconductor laser diodes of the first light source 102a and the second light source 102b may be plural, and they are arranged in a matrix. Further, the first light source 101a and the second light source 101b may respectively emit two excitation light beams with the same power and different linear polarization states.

The light combining device 102 is a light combining film, such as a polarizing light combining sheet, and the light combining film reflects light having a first polarization state and transmits light having a second polarization state, and the light combining film may be obliquely disposed (e.g., obliquely disposed at an angle of 45 degrees) with respect to the outgoing light of the first light source 102a and the outgoing light of the second light source 102 b. In this embodiment, the light combining device 102 includes a first surface and a second surface opposite to the first surface, the first surface receives the first excitation light emitted by the first light source 101a and reflects the first excitation light, and the second surface receives the second excitation light emitted by the second light source 101b and transmits the second excitation light, so that the first excitation light and the second excitation light overlap and combine.

The light source device 100 further includes a light homogenizing device 103, where the light homogenizing device 103 is located between the light combining device 102 and the first light splitting and combining device 104, and is configured to homogenize the first excitation light and the second excitation light emitted by the light combining device 102 and guide the homogenized first excitation light and second excitation light to the first light splitting and combining device 104. The light homogenizing device 103 may include a diffusion sheet, a light homogenizing square bar, a fly eye lens, or the like. The light homogenizing device 103 homogenizes the first excitation light and the second excitation light (such as gaussian beams) into relatively uniform laser spots, and the polarization states of the first excitation light and the second excitation light are not changed in the light homogenizing process.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a first light splitting and combining device 104 of the light source system 10 shown in fig. 4. The first light splitting and combining device 104 further includes a light splitting film 104b, where the light splitting film 104b is disposed on a side of the at least one lens substrate 104a away from the light source device 100. Specifically, the at least one transparent substrate 104a reflects a portion of the second excitation light to the light processing device 106, the at least one transparent substrate 104a also transmits another portion of the second excitation light and the first excitation light to the light splitting film 104b, and the light splitting film 104b transmits another portion of the second excitation light and the first excitation light. Alternatively, at least one transparent substrate 104a may reflect a part of the first excitation light to the light processing device 106, the at least one transparent substrate 104a may transmit another part of the first excitation light and the second excitation light to the light splitting film 104b, and the light splitting film 104b may transmit another part of the first excitation light and the second excitation light. It is understood that the at least one transparent substrate 104a and the light splitting film 104b may be disposed in direct contact and stacked, for example, the light splitting film 104b is directly formed on the at least one transparent substrate 104a, or may be disposed in a stacked manner by bonding a glue layer, or disposed at a certain distance. The at least one transparent substrate 104a may be white glass, and the white glass refers to optical glass that is not coated with a film. In the visible and near infrared spectral regions, optical glasses are almost ideal optical materials, stable in performance over a fairly broad range, easy to process, uniform, transparent and economical. The light splitting film 104b may transmit the excitation light and reflect the lasing light, such as transmitting blue light and reflecting yellow light (including red light and green light).

In this embodiment, the at least one transparent substrate 104a includes a first transparent substrate 104c and a second transparent substrate 104d that are stacked, the second transparent substrate 104d is located between the first transparent substrate 104c and the light splitting film 104b, the first transparent substrate 104c includes a first surface and a second surface opposite to the first surface, the second transparent substrate 104d includes a third surface adjacent to the second surface and a fourth surface opposite to the third surface, and the light splitting film 104b is disposed on the fourth surface. The first light splitting and combining device 104 further includes an antireflection film 104e, where the antireflection film 104e is disposed on a surface of one transparent substrate adjacent to the light source device, specifically, the antireflection film 104e is disposed on a surface (such as a third surface) of a transparent substrate (such as a second transparent substrate 104 d) farthest from the light source device 100 adjacent to a previous transparent substrate (such as a first transparent substrate 104 c), that is, in this embodiment, the third surface is further disposed with the antireflection film 104e, the first surface is configured to receive the first excitation light and the second excitation light, the first surface and the second surface reflect a part of the excitation light in the second excitation light, and the first transparent substrate 104c, the antireflection film 104e, the second transparent substrate 104d, and the light splitting film 104b sequentially transmit the other part of the excitation light and the first excitation light. It is understood that the transparent substrates of the at least one transparent substrate 104a may be disposed in direct contact and stacked, or may be disposed in a stacked manner by bonding with a glue layer, or disposed at a certain distance. The first transparent substrate 104c and the second transparent substrate 104d are both white glass, a certain interval may be provided between the first transparent substrate 104c and the second transparent substrate 104d, no coating or film may be provided on the first surface and the second surface of the first transparent substrate 104c, the light splitting film 104b and the anti-reflection film 104e may be formed on the third surface and the fourth surface of the second transparent substrate 104d, or the light splitting film 104b and the anti-reflection film 104e may be attached by colloid.

In detail, when the light source system 10 is operated, the first excitation light and the second excitation light with different polarization states may all be incident on the at least one transparent substrate 104a at an angle of 45 degrees, for example, the first excitation light with the first polarization state is incident on the first surface of the first transparent substrate 104c at an angle of 45 degrees, and almost all of the first excitation light with the first polarization state is transmitted to the light splitting film 104b by the first transparent substrate 104c and the second transparent substrate 104d, and further transmitted from the light splitting film 104b, and a part of the second excitation light with the second polarization state is reflected by the first surface and the second surface, another part of the second excitation light in the second polarization state is transmitted by the first transparent substrate 104c, the second transparent substrate 104d and the light splitting film 104b in sequence. Specifically, when the first excitation light and the second excitation light with different polarization states are incident on the first light splitting and combining device 104 at an angle of 45 degrees, the light with P polarization state can be almost completely transmitted, and the light with S polarization state has 4.5% reflection (i.e. the first preset ratio is 4.5%) and the other parts are transmitted when the light is incident on a single surface of the white glass. Similarly, when the excitation light is incident on the two surfaces of the white glass, the light in the P polarization state can be almost transmitted, the light in the S polarization state is reflected by 9 percent (namely, the first preset proportion is 9 percent), and the other parts are transmitted; when the excitation light is incident on four surfaces of the white glass (two or three white glass sheets can be stacked), the light with the polarization state of P can be almost transmitted, 18 percent (namely 18 percent of the first preset proportion) of the light with the polarization state of S is reflected, and the other parts are transmitted. It will be appreciated that 4.5% of the S polarized light is reflected each time it passes a surface of the white glass. When there is a plurality of white glass sheets, and polarized light is not required to be reflected on each surface, the surface of part of the white glass sheets can be plated with an antireflection film, a light splitting film and the like. Accordingly, the number of white glasses may be set according to the proportion of the S-polarized light that needs to be reflected by the light splitting and combining device 104. For example, when 9% of the S polarized light needs to be reflected to the light processing device 106, two pieces of white glass may be disposed in the light splitting and combining device 104, where the second piece of white glass may be a film antireflection film near the first piece of white glass, and the other piece of white glass may be a light splitting film disposed on the other side, so that the S polarized light passes through two surfaces of the first piece of white glass to generate two reflections, that is, 9% of the S polarized light is reflected to enter the light processing device 106, and other portions of the S polarized light is transmitted to enter the wavelength conversion device 107. When 13.5% of the S-polarized light (i.e., 13.5% of the first preset ratio) needs to be reflected to the light processing device 106, two pieces of white glass may be disposed in the light splitting and combining device 104, and a light splitting film may be disposed on a surface of the second piece of white glass, which is far away from the first piece of white glass, so that three reflections occur when the S-polarized light passes through two surfaces of the first piece of white glass and one surface of the second piece of white glass, that is, 13.5% of the S-polarized light is reflected to enter the light processing device 106, and other portions of the S-polarized light is transmitted to enter the wavelength conversion device 107. The light source system 10 uses a transparent substrate (such as white glass) as a light splitting device, and uses the transparent substrate to split light with different polarization states according to the transmission and reflection characteristics, so that the cost is saved, the influence of the optical coating difference on the light splitting proportion is avoided, and the consistency of the light splitting proportion is ensured. Meanwhile, the first excitation light and the second excitation light are controlled to enter the first light splitting and combining device 104 at an incident angle of 45 degrees, so that the light axis of the laser emitted from the wavelength conversion device and the light axis of the third excitation light emitted from the light processing device 106 are overlapped, and further the efficiency of the optical machine and the uniformity of the light are further improved.

Further, in this embodiment, the light processing device 106 scatters a portion of the second excitation light and converts a portion of the second excitation light into the third excitation light, where the third excitation light has the first polarization state, and the light processing device 106 directs (e.g., reflects) the third excitation light to the first light splitting and combining device.

Specifically, the light processing device 106 includes a scattering element 106a and a polarization conversion element 105, the at least one transparent substrate 104a guides a portion of the second excitation light to the polarization conversion element 105, and the polarization conversion element 105 performs a first polarization conversion on a portion of the second excitation light and guides a portion of the first polarization converted second excitation light to the scattering element 106a. The scattering element 106a scatters a part of the second excitation light having undergone the first polarization conversion and guides the scattered part of the second excitation light having undergone the first polarization conversion to the polarization conversion element 105, and when the part of the second excitation light having undergone the first polarization conversion is incident on the scattering element 106a, polarization-maintaining scattering occurs, that is, the polarization state is not changed but the beam angle is increased. The polarization conversion element 105 performs second polarization conversion on a part of the scattered second excitation light, which has undergone first polarization conversion, to obtain the third excitation light. Further, the polarization conversion element 105 is a 1/4 glass slide. The light processing device 106 further comprises a collecting lens 108a, the collecting lens 108a being arranged between the scattering element 106a and the polarization conversion element 105.

The wavelength conversion device 107 is a reflective wavelength conversion device, such as a reflective color wheel, a wavelength conversion material (such as a fluorescent material) is disposed on the wavelength conversion device 107, the wavelength conversion material of the wavelength conversion device 107 is excited by another portion of the first excitation light and the second excitation light to generate the laser, and the wavelength conversion device 107 also guides (e.g. reflects) the laser to the first light splitting and combining device 104. In this embodiment, the wavelength conversion material is a yellow fluorescent material, and the lasing light is a yellow lasing light. The light source system 100 may further include a collecting system disposed between the first light splitting and combining device and the wavelength conversion device 107, and the collecting system may be a collecting lens 108b configured to collect the laser light emitted by the wavelength conversion device 107 and guide the collected laser light to the first light splitting and combining device 104.

Further, the third excitation light may be incident on the first surface of the at least one transparent substrate 104a along an angle of 45 degrees, and the at least one transparent substrate 104a may transmit the third excitation light to the light-emitting channel through the light-splitting film 104b due to the first polarization state of the third excitation light. The light-splitting film 104b also receives the laser light emitted from the wavelength conversion device 107, and since the light-splitting film 104b transmits excitation light (blue light) and reflects receiving laser light (yellow light), the light-splitting film 104b also reflects the laser light emitted from the wavelength conversion device 107 to the light-emitting channel. The third excitation light and the laser combine at the light splitting film 104b and the light emitting channel, so that the light emitting channel can emit white light.

Further, in this embodiment, 9% of the second excitation light having the second polarization state is reflected. Therefore, the first excitation light and the second excitation light are split into two excitation lights of "excitation light of the second polarization state" (i.e., a part of the excitation light of the second polarization state) and "mixed light" (i.e., another part of the excitation light of the second polarization state and the first excitation light) by the first light splitting device 104. A portion of the second excitation light with the second polarization state is polarization-preserving scattered by the scattering element 106a (i.e. the polarization state is not changed but the beam angle is increased) and is collected by the collecting lens 108a to be emitted, where the power ratio is 9%, and the power ratio is the ratio of a portion of the second excitation light with the second polarization state (i.e. "excitation light with the second polarization state") to the sum of the first excitation light and the second excitation light, and because a portion of the second excitation light with the second polarization state passes through the polarization conversion element 105 (e.g. 1/4 glass slide) during the emitting and the incident process, a portion of the second excitation light with the second polarization state is converted into the third excitation light with the first polarization state, and is completely transmitted when passing through the first light splitting device 104 again. Further, the power ratio of the other part of the second excitation light with the second polarization state to the first excitation light (i.e. "mixed light") is 91%, where the power ratio is the ratio of the other part of the second excitation light with the second polarization state to the sum of the first excitation light (i.e. "mixed light") and the first excitation light to the second excitation light, and the other part of the second excitation light with the second polarization state to the first excitation light is used to excite the wavelength conversion material of the wavelength conversion device 107 to generate a excited light (such as yellow excited light), and the excited light is reflected at a large angle and is emitted after being collected by the collecting lens 108b, and is totally reflected when passing through the first light splitting and combining device 104, and the reflected excited light and the transmitted third excitation light are mixed into white light or light with a specific color (such as polarized light or blue light).

In the light source system 10 of the present invention, the first light splitting device 104 includes at least one transparent substrate 104a and a light splitting film 104b stacked on the at least one transparent substrate 104a, and the at least one transparent substrate 104a splits the first excitation light and the second excitation light, so that the light processing device 106 and the wavelength conversion device 107 generate scattered excitation light and the laser light for the excitation light, respectively, and the scattered excitation light and the laser light are finally combined in the light-emitting channel, and the at least one transparent substrate 104a and the light splitting film 104b can split the first excitation light and the second excitation light by using the transmission and reflection characteristics of the light with different polarization states, so that not only the volume is smaller, the light utilization ratio is higher, but also the light splitting is uniform, and the phenomenon of uneven light emission caused by regional light splitting does not occur, so that the volume of the light source system 10 is smaller, the light utilization ratio is higher, and the light emission is uniform.

Further, in the first light splitting and combining device 104, the light splitting film 104b transmits the third excitation light converted by the first excitation light and reflects the laser light, so that not only the optical efficiency is improved, but also the structure of the light source system 10 is compact and the volume is smaller, so that the light source system 10 is a cheap and efficient light source.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a first light splitting and combining device of a light source system according to a second embodiment of the present invention. The light source system is basically the same in structure as the light source system of the first embodiment, that is, the above description of the light source system is basically applicable to the light source system, and the difference therebetween mainly lies in: the third surface of the second transparent substrate 104d of the first light splitting and combining device may not be provided with an antireflection film. Specifically, in the first light splitting and combining device 104, at least one transparent substrate 104a includes a first transparent substrate 104c and a second transparent substrate 104d that are stacked, the second transparent substrate 104d is located between the first transparent substrate 104c and the light splitting film 104b, the first transparent substrate 104c includes a first surface and a second surface opposite to the first surface, the second transparent substrate 104d includes a third surface adjacent to the second surface and a fourth surface opposite to the third surface, the light splitting film 104b is disposed on the fourth surface, the first surface is configured to receive the first excitation light and the second excitation light, the first surface, the second surface and the third surface reflect a portion of the excitation light in the second excitation light, and the first transparent substrate 104c, the second transparent substrate 104d and the light splitting film 104b sequentially transmit the other portion of the excitation light and the first excitation light.

In this embodiment, compared to the first embodiment, since the third surface is not provided with the antireflection film, the second excitation light having the second polarization state may be further reflected on the third surface, so that the proportion of the second excitation light having the second polarization state reflected by the at least one transparent substrate 104a (i.e. the first and second transparent substrates 104c and 104 d) of the first light-splitting device 104 is increased, for example, the power ratio of the second excitation light may reach 13.5%, that is, the power ratio of a portion of the second excitation light to the sum of the first excitation light and the second excitation light reaches 13.5%, and the power ratio of another portion of the second excitation light transmitted by the at least one transparent substrate 104a to the sum of the first excitation light and the second excitation light is reduced to 86.5%. Therefore, the spectral ratio, that is, the ratio of the transmitted light to the reflected light can be changed by providing or not providing the antireflection film on the at least one transparent substrate 104a, so as to realize white light with different color temperatures, which is widely used in many illumination, display or projection fields.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a first light splitting and combining device of a light source system according to a third embodiment of the present invention. The light source system is basically the same in structure as the light source system of the first embodiment, that is, the above description of the light source system is basically applicable to the light source system, and the difference therebetween mainly lies in: the number of transparent substrates of the first light splitting and combining device 104 is different. Specifically, the first light splitting and combining device 104 includes a first transparent substrate 104a, the first transparent substrate 104a includes a first surface and a second surface opposite to the first surface, the light splitting film 104b is disposed on the second surface, the first surface is configured to receive the first excitation light and the second excitation light and reflect a part of the excitation light in the second excitation light, and the first transparent substrate 104a and the light splitting film 104b sequentially transmit the other part of the excitation light and the first excitation light.

In the present embodiment, compared to the first embodiment, since the at least one transparent substrate includes only the first transparent substrate 104a, the second excitation light having the second polarization state is further reflected on the first surface, so that the proportion of the second excitation light having the second polarization state reflected by the first transparent substrate 104a of the first light splitting and combining device 104 is reduced, for example, the power ratio is reduced to 4.5%, that is, the power ratio of a part of the second excitation light to the sum of the first excitation light and the second excitation light is 4.5%, and the power ratio of another part of the second excitation light transmitted by the first transparent substrate 104a to the sum of the first excitation light and the second excitation light is reduced to 95.5%. It can be seen that the spectral ratio, that is, the ratio of the transmitted light to the reflected light can be changed by providing or not providing an antireflection film on the first transparent substrate 104a, so that white light with different color temperatures can be realized.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a first light splitting and combining device of a light source system according to a fourth embodiment of the present invention. The light source system is basically the same in structure as the light source system of the first embodiment, that is, the above description of the light source system is basically applicable to the light source system, and the difference therebetween mainly lies in: the number of transparent substrates of the first light splitting and combining device 104 is different. Specifically, in the first light splitting and combining device 104, the at least one transparent substrate 104a includes a first transparent substrate 104c, a second transparent substrate 104d, and a third transparent substrate 104f that are stacked, where the first transparent substrate 104c, the second transparent substrate 104d, the third transparent substrate 104f, and the light splitting film 104b are sequentially disposed, the first transparent substrate 104c includes a first surface and a second surface opposite to the first surface, the second transparent substrate 104d includes a third surface adjacent to the second surface and a fourth surface opposite to the third surface, the third transparent substrate 104f includes a fifth surface adjacent to the fourth surface and a sixth surface opposite to the fifth surface, the light splitting film 104b is disposed on the sixth surface, the fifth surface is further provided with a light splitting film 104e, the first surface is configured to receive the first excitation light and the second excitation light, the first surface, the second surface, and the third light splitting film 104b sequentially excite the first excitation light and the second excitation light, and the second light splitting film 104 b.

In comparison with the first embodiment, in the present embodiment, since the at least one transparent substrate 104a includes the first transparent substrate 104c, the second transparent substrate 104d and the third transparent substrate 104f which are stacked, the second excitation light having the second polarization state may be further reflected on the fourth surface, so that the proportion of the second excitation light having the second polarization state reflected by the at least one transparent substrate 104a (i.e., the first, second and third transparent substrates 104c, 104d and 104 f) of the first light splitting and combining device 104 is increased, for example, the power ratio thereof may reach 18%, that is, the power ratio of a portion of the second excitation light to the sum of the first excitation light and the second excitation light reaches 18%, and the power ratio of another portion of the second excitation light transmitted by the at least one transparent substrate 104a to the sum of the first excitation light and the second excitation light decreases to 82%. Therefore, the spectral ratio, i.e. the ratio of the transmitted light to the reflected light, can be changed by providing or not providing an antireflection film on the at least one transparent substrate 104a and providing the number of white glass sheets, so as to realize white light with different brightness or color temperature, which is widely used in many illumination, display or projection fields.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a first light splitting and combining device of a light source system according to a fifth embodiment of the present invention. The light source system is basically the same in structure as the light source system of the fourth embodiment, that is, the above description of the light source system is basically applicable to the light source system, and the difference therebetween mainly lies in: the third surface of the third transparent substrate 104f of the first light splitting and combining device 104 may not be provided with an antireflection film. Specifically, in the first light splitting and combining device 104, the at least one transparent substrate 104a includes a first transparent substrate 104c, a second transparent substrate 104d, and a third transparent substrate 104f that are stacked, the first transparent substrate 104c, the second transparent substrate 104d, the third transparent substrate 104f, and the light splitting film 104e are sequentially disposed, the first transparent substrate 104c includes a first surface and a second surface opposite to the first surface, the second transparent substrate 104d includes a third surface adjacent to the second surface and a fourth surface opposite to the third surface, the third transparent substrate 104f includes a fifth surface adjacent to the fourth surface and a sixth surface opposite to the fifth surface, the first surface is configured to receive the first excitation light and the second excitation light, the first surface, the second surface, the third surface, the fourth surface, and the fifth surface sequentially reflect a portion of the second excitation light, and the first transparent substrate 104c, the third transparent substrate 104f, and the other transparent substrate are sequentially transmitted by the first excitation light and the fifth light.

In comparison with the fourth embodiment, in the present embodiment, since the fifth surface is not provided with the antireflection film, the second excitation light having the second polarization state may be further reflected on the fifth surface, so that the proportion of the second excitation light having the second polarization state reflected by the at least one transparent substrate 104a (i.e., the first, second and third transparent substrates 104c, 104d and 104 f) of the first light-splitting device 104 may be increased, for example, the power ratio may reach 22.5%, that is, the power ratio of a portion of the second excitation light to the sum of the first excitation light and the second excitation light reaches 22.5%, and the power ratio of another portion of the second excitation light transmitted by the at least one transparent substrate 104a to the sum of the first excitation light and the second excitation light is reduced to 77.5%. Therefore, the spectral ratio, that is, the ratio of the transmitted light to the reflected light can be changed by providing or not providing the antireflection film on the at least one transparent substrate 104a, so as to realize white light with different color temperatures, which is widely used in many illumination, display or projection fields.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a light source system according to a sixth embodiment of the present invention. The light source system is basically the same in structure as the light source system of the fourth embodiment, that is, the above description of the light source system is basically applicable to the light source system, and the difference therebetween mainly lies in: the light source system further includes a light source controller for controlling a light quantity ratio of the first excitation light emitted by the first light source 101a and the second excitation light emitted by the second light source 101b to be equal to the preset value. Specifically, different color temperatures and white balance adjustment of the light source system are achieved by adopting a combination of first excitation light with a first polarization state and second excitation light with a second polarization state of different light amounts.

The first light source 101a and the second light source 101b each include a number of light emitting elements (e.g., lasers). In one embodiment, the light source controller may control the light quantity ratio of the first excitation light to the second excitation light to be equal to the preset value by controlling the number of on and off of the light emitting elements of the first light source 101a and the second light source 101 b. In another embodiment, the light source controller controls the light quantity ratio of the first excitation light to the second excitation light to be equal to the preset value by controlling the light emitting power of the light emitting elements of the first light source 101a and the second light source 101 b.

Specifically, the first light source 101a and the second light source 101b may each include a plurality of lasers, and the light source controller controls the on/off of the lasers with different numbers, so that the combination of the first excitation light and the second excitation light with different numbers can be realized, and the first light splitting and combining device is further matched to realize a plurality of different light splitting duty ratios, that is, the proportion of the transmitted light and the reflected light is changed, so that white light with different color temperatures is realized.

For example: when the first light source 101a can be turned off, the second light source 101b emits the second excitation light with the second polarization state, and the second excitation light with the second polarization state reflected by the at least one transparent substrate 104a of the first light splitting and combining device 104 has a duty ratio of 18%. When the light quantity ratio of the second excitation light to the first excitation light is 3:1, the ratio of the second excitation light having the second polarization state reflected by the at least one transparent substrate 104a of the first light splitting/combining device 104 is 13.5%. When the light quantity ratio of the second excitation light to the first excitation light is 1:3, the second excitation light having the second polarization state reflected by the at least one transparent substrate 104a of the first light splitting/combining device 104 has a duty ratio of 4.5%. As can be seen, when the light source controller dynamically adjusts the light powers of the two sets of lasers with different polarization states, the light splitting duty ratio of the at least one transparent substrate 104a of the first light splitting and combining device 104 can be continuously adjusted, so that the color temperature of the white light dynamically changes. For example, when the amount of the second excitation light having the second polarization state emitted by the second light source 101b is adjusted to zero, the light emitted by the light source system 10 is yellow light, and the color temperature is low; when the light quantity of the first excitation light with the first polarization state emitted by the first light source 101b is adjusted to zero, white light with higher color temperature is emitted by the system.

In this embodiment, the number of lasers turned on by the first light source 101a and the second light source 101b is controlled, or the combination of the amounts of the first excitation light and the second excitation light is dynamically adjusted, and the combination of the first light splitting and combining device 104 is combined, so that a light source system with a wider color temperature range, high efficiency and dynamic white balance adjustment can be realized.

Referring to fig. 11, fig. 11 is a schematic diagram of a light source system 40 according to a seventh embodiment of the invention. The light source system 40 is basically the same as the light source system 10 of the first embodiment, that is, the above description of the light source system 10 is basically applicable to the light source system 40, and the difference therebetween is mainly that: the light processing device 405 is a transmissive light processing device; the wavelength conversion device 406 is a transmissive wavelength conversion device; the light source device 400 further comprises guiding means; the light processing device 405 transmits and scatters a part of the excitation light in the second excitation light to convert a part of the excitation light in the second excitation light into the third excitation light, the wavelength conversion device 406 is a transmission wavelength conversion device, and the guiding device receives the third excitation light emitted by the light processing device 405 and the laser light emitted by the wavelength conversion device 406 and guides both the third excitation light and the laser light to an light emitting channel.

Specifically, in the present embodiment, the guiding device includes a first guiding element 408a, a second guiding element 408b, and a light combining element 409. The first guide element 408a and the second guide element 408b may be reflective elements, such as mirrors. The first guiding element 408a receives the third excitation light and guides (e.g., reflects) the third excitation light to the light combining element 409, the second guiding element 408b guides (e.g., reflects) the excited light to the light combining element 409, and the light combining element 409 guides the third excitation light and the excited light to the light emitting channel. Specifically, the light combining element 409 transmits the third excitation light to the light-emitting channel, and the light combining element 409 reflects the laser light to the light-emitting channel. Further, in the present embodiment, a collecting lens 407 is disposed between the wavelength conversion device 406 and the guiding device, and the wavelength conversion device 405 emits the laser light, which is collected by the collecting lens 407 and reaches a second guiding element 408b of the guiding device.

Referring to fig. 12, fig. 12 is a schematic structural diagram of a light source system according to an eighth embodiment of the present invention. The light source system 40 'has substantially the same structure as the light source system 40 of the seventh embodiment, that is, the above description of the light source system 40 is basically applicable to the light source system 40', and the difference therebetween is mainly that: the light source system 40' further comprises a supplemental light source 501, the supplemental light source 501 emits supplemental light, the supplemental light has a first polarization state, and the first light splitting and combining device 404 further guides the supplemental light to the light emitting channel via the light processing device 405 and the guiding device. Specifically, the supplemental light source 501 includes a red laser, the supplemental light includes a red laser light, the first light splitting and combining device 404 transmits the supplemental light to the light processing device 405, the light processing device 405 further transmits the supplemental light to the first guiding element 408a, so that the first guiding element 408a reflects the supplemental light to the light combining element 409, so that the light combining element 409 transmits the supplemental light to the light outgoing channel. In this embodiment, the light source system 40' further adds the supplemental light source 501, and the supplemental light can supplement the light source system 40' with light of a specific color or a specific color gamut, so that the light output of the light source system 40' is better.

It is to be understood that, in the seventh and eighth embodiments, the first and second light sources 401, the light combining device 402, and the light homogenizing device 403 in the light source apparatus 400 may be the same as the first and second light sources 101, the light combining device 102, and the light homogenizing device 103 in the first embodiment, and the structures thereof will not be repeated here.

Referring to fig. 13, fig. 13 is a schematic structural diagram of a light source system according to a ninth embodiment of the present invention. The light source system 60 has substantially the same structure as the light source system 10 of the first embodiment, that is, the above description of the light source system 60 is basically applicable to the light source system, and the difference therebetween is mainly that: the light source system 60 further includes a second light splitting/combining device 6042, and the wavelength conversion device includes a first wavelength conversion element 6071 and a second wavelength conversion element 6072. Another part of the second excitation light directed to the wavelength conversion device 606 by the first light splitting and combining device 6041 and the first excitation light are defined as first light, a part of the second excitation light directed to the light processing device 606 by the first light splitting and combining device 6041 is defined as second light, the first light splitting and combining device 6041 directs the first light to the second light splitting and combining device 6042, the second light splitting and combining device 6042 is used for directing a first part of the first light to the first wavelength conversion element 6071, the second light splitting and combining device 6042 is further configured to guide a second portion of the first light to the second wavelength conversion element 6072, the laser includes a first lasing section and a second lasing section, the first wavelength conversion element 6071 converts the first portion of the first light to the first lasing section, the second wavelength conversion element 6072 converts the second portion of the first light to the second lasing section, and the first lasing section and the second lasing section are both guided to the light-emitting channel, wherein a ratio of the first portion of the first light to the first light is a second preset ratio.

In this embodiment, the first wavelength conversion element 6071 may be provided with a first fluorescent material (e.g., red fluorescent material), the first lasing light may be red light, the second wavelength conversion element 6072 may be provided with a second fluorescent material (e.g., green fluorescent material), and the second lasing light may be green light.

The second light splitting and combining device 6042 includes at least one other transparent substrate 604a ', the at least one other transparent substrate 604a ' guides the first portion of the first light to the first wavelength converting element 6071, the at least one other transparent substrate 604a ' also guides the second portion of the first light to the second wavelength converting element 6072, and the second predetermined ratio is adapted to the number of other transparent substrates of the second light splitting and combining device 6042. The other transparent substrate 604a' may also be white glass. In this embodiment, the number of the other transparent substrates 604a 'may be two, and the two other transparent substrates 604a' are stacked. The second light splitting and combining device 6042 may also include an antireflection film, where the antireflection film may be disposed on a surface of one of the other transparent substrates 604a' adjacent to the light source device (e.g., the antireflection film is disposed on a surface of the other transparent substrate farthest from the first light splitting and combining device 6041 adjacent to the previous other transparent substrate).

In this embodiment, the second light splitting and combining device 6042 further includes a second light splitting film 604b 'disposed on a side of the at least one other transparent substrate 604a' away from the first light splitting and combining device 6041. The first wavelength conversion element 6071 further guides the first laser light to the second light splitting and combining device 6042, the second wavelength conversion element 6072 further guides the second laser light to the second light splitting and combining device 6042, the other light splitting film 604b 'further transmits one of the first laser light receiving and the second laser light to cause the one laser light to be guided to the light emitting channel, and the other light splitting film 604b' further reflects the other one of the first laser light receiving and the second laser light to cause the other one laser light to be guided to the light emitting channel.

When the light source system 60 works, at least one transparent substrate of the first light splitting/combining device 6041 reflects a first predetermined proportion of the excitation light (i.e., the second light) in the second excitation light to the light processing device 606, and guides another portion of the excitation light in the second excitation light and the first excitation light (i.e., the first light) to the second light splitting/combining device 6042. The second light splitting and combining device 6042 reflects a part of the other part of the second excitation light (i.e., a first part of the first light) to the first wavelength conversion element 6071, and the second light splitting and combining device 6042 also transmits the other part of the second excitation light and the first excitation light (i.e., a second part of the first light) to the second wavelength conversion element 6072. The light processing device 606 receives a part of the second excitation light and emits a third excitation light to the first light splitting and combining device 6041, and the first light splitting and combining device 6041 transmits the third excitation light to a guiding device, so that the guiding device guides the third excitation light to the light emitting channel. The first wavelength conversion element 6071 emits the first laser light to the second light splitting and combining device 6042, the second wavelength conversion element 6072 emits the second laser light to the second light splitting and combining device 6042, the second light splitting and combining device 6042 further transmits the first laser light to the guiding device and reflects the second laser light to the guiding device, so that the guiding device guides the first laser light and the second laser light to the light emitting channel. The guiding device includes a guiding element 609 and a light combining element 6043, the second light splitting and combining device 6042 guides the first laser light and the second laser light to the guiding element 609 (such as a reflecting element), and the guiding element 609 guides the combined light of the first laser light and the second laser light to the light combining element 6043. The light combining element 6043 guides (e.g., transmits) the third excitation light to the light-emitting channel, and the light combining element 6043 also guides (reflects) the first lasing light and the second lasing light to the light-emitting channel. In this embodiment, the wavelength conversion device includes first and second wavelength conversion elements 6071 and 6072, so that two types of lasers can be generated using fluorescent materials different from those of the first embodiment, so that the light source system 60 can have more choices for the fluorescent materials of the wavelength conversion device.

Referring to fig. 14, fig. 14 is a schematic diagram of a light source system 60' according to a tenth embodiment of the present invention. The light source system 60 'has substantially the same structure as the light source system 60 of the ninth embodiment, that is, the above description of the light source system 60 is basically applicable to the light source system 60', and the difference therebetween is mainly that: the second spectroscopic optical splitting device 6042 is different. The second light splitting and combining device 6042 includes a polarization light splitting element 604g (e.g., a polarization light splitting film), and the second light splitting and combining device 6042 splits the received excitation light into the first part of excitation light and the second part of excitation light with different polarization states. Specifically, the second light splitting and combining device may take light of a first polarization state in the received excitation light (i.e., the first light) as the first part of light and direct (e.g., reflect) the first part of light to the first wavelength converting element, and take light of a second polarization state in the received excitation light as the second part of light and direct (e.g., transmit) the second part of light to the second wavelength converting element. The first wavelength conversion element 6071 receives a first lasing light generated by the first portion of light and directs (e.g., reflects) the first lasing light to the second light splitting and combining device. The second wavelength conversion element 6072 receives a second lasing light generated by the second portion of light and directs (e.g., reflects) the second lasing light to the second light splitting and combining device. The second light splitting and combining device 6042 further guides the first laser light and the second laser light to a light emitting channel through a guiding device. Specifically, the second light splitting and combining device 6042 transmits the first laser light and reflects the second laser light, so that the first laser light and the second laser light are guided to the guiding element 609, and the guiding element further guides (e.g. reflects) the first laser light and the second laser light to the light combining element 6043 and guides (e.g. reflects) the first laser light and the second laser light to the light emitting channel by the light combining element 6043, so as to further combine with the excitation light transmitted by the first light splitting and combining device 6041. In this embodiment, the first receiving laser is red receiving laser, the second receiving laser is green receiving laser, and the second light splitting device 6042 further includes a light splitting film 604b that transmits red light and reflects green light.

It is to be understood that, in the ninth and tenth embodiments, the first and second light sources 601, the light combining device 602, and the light homogenizing device 603 in the light source apparatus may be the same as the first and second light sources 101, the light combining device 102, and the light homogenizing device 103 in the first embodiment, and the scattering element 606a, the polarization conversion element 605, and the collecting lens 608 of the light processing device 606 may be the same as the scattering element 106a, the polarization conversion element 105, and the collecting lens 108a in the first embodiment, and the structures thereof will not be repeated here.

Referring to fig. 15, fig. 15 is a schematic diagram of a light source system 70 according to an eleventh embodiment of the present invention. The light source system 70 has substantially the same structure as the light source system 60 of the ninth embodiment, that is, the above description of the light source system 60 is basically applicable to the light source system 70, and the difference therebetween is mainly that: the light processing device 705 and the wavelength conversion device are different. The light processing device 705 transmits and scatters a part of the excitation light in the second excitation light to convert the part of the excitation light in the second excitation light into the third excitation light, the first wavelength conversion element 7061 and the second wavelength conversion element 7062 are both transmissive wavelength conversion devices, the second light splitting device 7042 guides (e.g., reflects) the second part of the excitation light to the second wavelength conversion element 7062 through a guiding element 7081b (e.g., a reflecting element), the first wavelength conversion element 7061 generates a first lasing light and guides the first lasing light to the guiding device, and the second wavelength conversion element 7062 generates a second lasing light and guides the first lasing light to the guiding device. The guiding device receives the third excitation light emitted by the light processing device 705, the first lasing light emitted by the first wavelength conversion element 7061, and the second lasing light emitted by the second wavelength conversion element 7062, and guides the third excitation light, the first lasing light, and the second lasing light to the light emitting channel.

Specifically, the guiding device includes a first guiding element 7081a, a first light combining element 7082a, and a second light combining element 7082b, the first guiding element 7081a receives the third excitation light and guides the third excitation light to the first light combining element 7082a, the first light combining element 7082a receives the first lasing light and the third excitation light and guides the first lasing light and the third excitation light to the second light combining element 7082b, the second wavelength converting element 7062 guides the second excitation light to the second light combining element 7082b, and the second light combining element 7082b guides the third excitation light, the first lasing light, and the second excitation light to the light outgoing channel.

Referring to fig. 16, fig. 16 is a schematic diagram illustrating a structure of a light source system 70' according to a twelfth embodiment of the present invention. The light source system 70 'is substantially identical in structure to the light source system 70 of the eleventh embodiment, that is, the above description of the light source system 70 is basically applicable to the light source system 70', and the difference therebetween is mainly that: the light source system 70' further includes a first supplemental light source 801a and a second supplemental light source 801b, the first supplemental light source 801a emits a first supplemental light, the first supplemental light is guided to the first light splitting and combining device 7041, the first light splitting and combining device 7041 further guides the first supplemental light to the light emitting channel via the light processing device 705 and the guiding device, the second supplemental light source 801b emits a second supplemental light, the second supplemental light is guided to the second light splitting and combining device 7042, and the second light splitting and combining device 7042 further guides the second supplemental light to the light emitting channel via the wavelength conversion device. Specifically, the second light splitting and combining device 7042 transmits the second supplemental light to the first wavelength conversion element 7061, and the first wavelength conversion element 7061 transmits the second supplemental light to a guiding device, so that the guiding device guides the second supplemental light to the light-emitting channel. In this embodiment, the first supplemental light source 801a and the second supplemental light source 801b are red supplemental light sources, such as red lasers, and the first supplemental light source and the second supplemental light source are red lasers. It can be appreciated that the first supplemental light source 801a and the second supplemental light source 801b may be green supplemental light sources; or the first supplemental light source 801a and the second supplemental light source 801b are supplemental light sources of different colors. Since the red laser is added as the supplementary light, the light source system 70 'can be supplemented with the light of a specific color or a specific color gamut, so that the light output of the light source system 70' is better.

Referring to fig. 17, fig. 17 is a schematic diagram of a light source system 70″ according to a thirteenth embodiment of the present invention. The light source system 70″ has substantially the same structure as the light source system 70 'of the twelfth embodiment, that is, the above description of the light source system 70' is basically applicable to the light source system 70″ and the difference therebetween is mainly that: the number of supplemental light sources is different. The light source system 70″ further includes a first supplemental light source 801a, a second supplemental light source 801b, and a third supplemental light source 901, wherein the first supplemental light source 801a emits a first supplemental light, the first supplemental light is guided to the first light splitting and combining device 7041, and the first light splitting and combining device 7041 further guides the first supplemental light to the light emitting channel via the light processing device 705, the first guiding element 7081a, the first light combining element 7082a, and the second light combining element 7082 b. The second supplemental light source 801b emits a second supplemental light, the second supplemental light is guided to the second light splitting and combining device 7042, and the second light splitting and combining device 7042 further guides the second supplemental light to the light emitting channel via the first wavelength conversion element 7061, the first light combining element 7082a, and the second light combining element 7082 b. The third supplemental light source 901 emits third supplemental light, the light source system 70″ further includes a second guiding element 7081b, the third supplemental light is guided to the second guiding element 7081b, and the second guiding element 7081b further guides the third supplemental light to the light-emitting channel via the second wavelength conversion element 7062 and the second light combining element 7082 b. In this embodiment, the first supplemental light source 801a and the second supplemental light source 801b are both red supplemental light sources, the first supplemental light source and the second supplemental light source are both red laser light, the third supplemental light source 901 is a green supplemental light source, and the third supplemental light source is a green laser light, and the light source system 70″ can be supplemented with specific color or specific color gamut light due to the addition of the red laser light and the green laser light as supplemental light, so that the light output of the light source system 70″ is better.

It is understood that in the first, twelfth and thirteenth embodiments, the first and second light sources 701, the light combining device 702, and the light homogenizing device 703 in the light source apparatus may be the same as the first and second light sources 101, the light combining device 102 and the light homogenizing device 103 in the first embodiment, and the light processing device 705 and the collecting lens 707 may be the same as the scattering element 405 and the collecting lens 108b in the seventh embodiment, and the structure thereof will not be repeated here.

Referring to fig. 18 and 19, fig. 18 is a schematic structural diagram of a light source system 10 'according to a fourteenth embodiment of the present invention, and fig. 19 is a schematic plan structural diagram of a first light splitting and combining device 1104 of the light source system 10' shown in fig. 18. The light source system 10 'is basically the same as the light source system 10 of the first embodiment, that is, the above description of the light source system 10 is basically applicable to the light source system 10', and the difference therebetween is mainly that: the surface 41 of the at least one transparent substrate 1104a for receiving the first excitation light and the second excitation light (i.e., the first surface of the first transparent substrate) includes a first region 41a and a second region 41b located at the periphery of the first region 41a, and the second region 41b is provided with an antireflection film 1104h. In this embodiment, the glass of the at least one transparent substrate 1104a is coated with a region, that is, the first region 41a at the center is not coated with a film, and the second region 41b at the edge is provided with an antireflection film.

Since the first and second excitation lights have small etendue, the boundary range of the beam of the excitation light is small in the first region 41a, and the transmission characteristics of the polarized light are split by the at least one transparent substrate 1104a at 45 ° in the first region 41a at the center. The third excitation light passing through the light processing device 1106 has a large etendue, and the boundary of the light beam at the first region 41a is large, so that there is less reflection loss in the first region 41a at the center, and the second region 41b at the edge is completely transmitted through the antireflection film 1104h, so that the at least one transparent substrate 1104a further improves the optical utilization efficiency compared to a transparent substrate without a film at all.

Referring to fig. 20, fig. 20 is a schematic plan view of a first light splitting and combining device 1104' of a light source system according to a fifteenth embodiment of the invention. The light source system is basically the same in structure as the light source system of the fourteenth embodiment, that is, the above description of the light source system is basically applicable to the light source system, and the difference therebetween mainly lies in: the at least one transparent substrate of the first light splitting and combining device 1104' has different numbers of regions of the first region 41a ' of the surface 41 (without the antireflection film) and the second region 41b ' (with the antireflection film) for receiving the first excitation light and the second excitation light. In this embodiment, the first excitation light and the second excitation light form a plurality of light spots on the surface 41 of the first light splitting/combining device 1104' that receives the first excitation light and the second excitation light, the number of the first areas 41a ' is plural, and the first areas 41a ' are in one-to-one correspondence with the light spots.

In the light source system using the diffusing device 1103, the first excitation light and the second excitation light form separate excitation light spots in the first region 41a, as shown in fig. 20, in this case, an area without an antireflection film (i.e., the first region 41a ') is provided for the shape and the size of the excitation light spots, so that the first region 41a ' splits the transmittance characteristic of polarized light by using a 45 ° transparent substrate (i.e., the excitation light enters the first region 41a ' of the first light splitting and combining device 1104' at an incident angle of 45 °), the etendue of the scattered light (i.e., the third excitation light) passing through the light processing device is large, and the boundary range of the light beam in the first region 41a is large, so that there is a small reflection loss in the first region 41a without an antireflection film, and the first light splitting and combining device 1104' transmits completely in the second region 41b with an antireflection film, thereby improving the optical utilization rate.

It is to be understood that, in the fourteenth and fifteenth embodiments, the first and second light sources 1101, the light combining device 1102, and the light homogenizing device 1103 in the light source apparatus may be the same as the first and second light sources 101, the light combining device 102, and the light homogenizing device 103 in the first embodiment, and the scattering element 1106, the polarization conversion element 1105, and the collecting lens 1108 in the light processing apparatus may be the same as the scattering element 106a, the polarization conversion element 105, and the collecting lens 108a in the first embodiment, and the structures thereof will not be described here again.

Referring to fig. 21, fig. 21 is a block diagram of a display device according to a preferred embodiment of the invention. The display device 90 may be a projection device, such as LCD, DLP, LCOS projection devices, and the display device 90 may include a light source system 91, an optical mechanical system 92, and a projection lens 93, where the light source system 91 uses the light source system of any of the above embodiments or the light source system of the above-mentioned modified embodiment of the light source system. The optical-mechanical system 92 may perform image modulation on the light source light emitted by the light source system according to the image data to generate projection light required for displaying an image, and the projection lens 93 is used for projecting according to the projection light to display a projection image. The display device 90 employing the light source system described above and the light source system of the modified embodiment has a small volume.

It should be understood that the light source system and the light source system according to the modified embodiment of the present invention may be used in stage lighting systems, in-vehicle lighting systems, and operation lighting systems, and the like, and is not limited to the above-described projection apparatus.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A light source system is characterized in that the light source system comprises a light source device, a first light splitting and combining device, a wavelength conversion device and a light processing device,

The light source device is used for emitting first excitation light and second excitation light, wherein the first excitation light has a first polarization state, the second excitation light has a second polarization state different from the first polarization state, and the ratio of the luminous fluxes of the first excitation light and the second excitation light is a preset value;

The first light splitting and combining device comprises at least one transparent substrate, wherein the at least one transparent substrate is used for guiding a first preset proportion of excitation light in the second excitation light to one of the light processing device and the wavelength conversion device, and guiding the other part of excitation light in the second excitation light and the first excitation light to the other one of the light processing device and the wavelength conversion device, and the first preset proportion is matched with the number of the transparent substrates of the first light splitting and combining device;

The light processing device is used for scattering the received excitation light and emitting third excitation light;

The wavelength conversion device is used for converting the received excitation light into laser light;

the third excitation light and the laser light are also guided to a light-emitting channel, the combined light emitted from the light-emitting channel satisfies a predetermined brightness and color temperature,

The first light splitting and combining device also comprises an antireflection film, the antireflection film is arranged on the surface of a transparent substrate adjacent to the light source device in the at least one transparent substrate,

The surface of the at least one transparent substrate for receiving the first excitation light and the second excitation light comprises a first area and a second area positioned at the periphery of the first area, and the antireflection film is arranged in the first area.

2. A light source system as recited in claim 1, wherein: the light source device comprises a first light source and a second light source, the first light source is used for emitting first excitation light, the second light source is used for emitting second excitation light, the light source system comprises a light source controller, and the light source controller is used for controlling the light quantity ratio of the first excitation light emitted by the first light source and the second excitation light emitted by the second light source to the second excitation light to be equal to the preset value.

3. A light source system as recited in claim 2, wherein: the first light source and the second light source both comprise light emitting elements, and the light source controller controls the light quantity ratio of the first excitation light to the second excitation light to be equal to the preset value by controlling the on and off quantity of the light emitting elements of the first light source and the second light source.

4. A light source system as recited in claim 2, wherein: the first light source and the second light source both comprise light emitting elements, and the light source controller controls the light quantity ratio of the first excitation light to the second excitation light to be equal to the preset value by controlling the light emitting power of the light emitting elements of the first light source and the second light source.

5. A light source system as recited in claim 1, wherein: the first light splitting and combining device comprises a transparent substrate, wherein the transparent substrate is used for guiding the excitation light of a first preset proportion in the second excitation light to one of the light processing device and the wavelength conversion device, and guiding the other part of the excitation light in the second excitation light and the first excitation light to the other one of the light processing device and the wavelength conversion device.

6. A light source system as recited in claim 1, wherein: the first light splitting and combining device comprises at least two transparent substrates which are arranged in a stacked mode.

7. A light source system as recited in claim 6, wherein: the antireflection film is arranged on the surface of the transparent substrate farthest from the light source device, which is adjacent to the previous transparent substrate.

8. A light source system as recited in claim 1, wherein: the first excitation light and the second excitation light form a plurality of light spots on the surface of the at least one transparent substrate, which receives the first excitation light and the second excitation light, the number of the first areas is a plurality, and the first areas are in one-to-one correspondence with the light spots.

9. A light source system as recited in claim 1, wherein: the transparent substrate is white glass.

10. A light source system as recited in claim 1, wherein: the first light splitting and combining device further comprises a first light splitting film, the first light splitting film is arranged on one side, far away from the light source device, of the at least one transparent substrate, and the first light splitting film is used for guiding the at least one transparent substrate to transmit the other part of excitation light in the second excitation light and the first excitation light.

11. A light source system as recited in claim 10, wherein: the first light splitting film is further used for reflecting the laser emitted by the wavelength conversion device to guide the laser to the light emitting channel, and the first light splitting and combining device is further used for transmitting the third excitation light to guide the third excitation light to the light emitting channel.

12. A light source system as recited in claim 11, wherein: the light processing device scatters and converts a part of excitation light in the second excitation light into a third excitation light, the third excitation light has a first polarization state, the light processing device guides the third excitation light to the first light splitting and combining device, the wavelength conversion device guides the laser light to the first light splitting and combining device, the at least one transparent substrate and the light splitting film also transmit the third excitation light emitted by the light processing device to the light outlet channel, and the light splitting film also reflects the laser light emitted by the wavelength conversion device to the light outlet channel.

13. A light source system as recited in claim 12, wherein: the light processing device comprises a scattering element and a polarization conversion element, wherein the at least one transparent substrate guides a part of the second excitation light to the polarization conversion element, the polarization conversion element guides a part of the second excitation light subjected to the first polarization conversion to the scattering element after performing the first polarization conversion on the part of the second excitation light subjected to the first polarization conversion, and the scattering element scatters a part of the second excitation light subjected to the first polarization conversion and guides a part of the second excitation light subjected to the first polarization conversion to the polarization conversion element, and the polarization conversion element guides a part of the second excitation light subjected to the second polarization conversion after the scattering to the third excitation light after performing the second polarization conversion.

14. A light source system as recited in claim 1, wherein: the light processing device transmits and scatters a part of the excitation light in the second excitation light to convert a part of the excitation light in the second excitation light into the third excitation light, the wavelength conversion device is a transmission type wavelength conversion device, the light source system further comprises a guiding device, and the guiding device receives the third excitation light emitted by the light processing device and the excited light emitted by the wavelength conversion device and guides the third excitation light and the excited light to the light outlet channel.

15. A light source system as recited in claim 14, wherein: the guiding device comprises a first guiding element, a second guiding element and a light combining element, wherein the first guiding element receives the third excitation light and guides the third excitation light to the light combining element, the second guiding element guides the laser light to the light combining element, and the light combining element combines the third excitation light and the laser light and guides the combined laser light to the light emitting channel.

16. A light source system as recited in claim 14, wherein: the light source system further comprises a supplementary light source, the supplementary light source emits supplementary light, the supplementary light has a first polarization state, and the first light splitting and combining device further guides the supplementary light to the light emitting channel through the light processing device and the guiding device.

17. A light source system as recited in claim 1, wherein: the light source system further comprises a second light splitting and combining device, the wavelength conversion device comprises a first wavelength conversion element and a second wavelength conversion element, the first light splitting and combining device guides the first light to the second light splitting and combining device, the second light splitting and combining device is used for guiding the first part of the first light to the first wavelength conversion element, the second light splitting and combining device is also used for guiding the second part of the first light to the second wavelength conversion element, the laser comprises a first laser receiving light and a second laser receiving light, the first wavelength conversion element converts the first part of the first light to the first wavelength conversion element, the first laser receiving element converts the first part of the first light to the second laser receiving element, the second laser receiving element receives the second laser light, and the first light and the second laser receiving element receives the first laser light, the second laser receiving element receives the first laser light and the second laser light, and the first light receiving element receives the second laser light, and the first laser light receiving element receives the second laser light, and the second laser light receiving element receives the first laser light and the second laser light, and the first laser light receiving element and the second laser light receiving element, and the second laser light receiving element and the first laser light receiving element and second laser light receiving element and emitting the first laser light and second light and emitting element and second light.

18. A light source system as recited in claim 17, wherein: the second light splitting and combining device comprises a polarization light splitting element, and the polarization states of the first part of light and the second part of light are different.

19. A light source system as recited in claim 17, wherein: the second light splitting and combining device comprises at least one other transparent substrate, the at least one other transparent substrate guides the first part of light in the first light to the first wavelength conversion element, the at least one other transparent substrate also guides the second part of light in the first light to the second wavelength conversion element, and the second preset proportion is adapted to the number of the other transparent substrates of the second light splitting and combining device.

20. A light source system as recited in claim 19, wherein: the first wavelength conversion element is used for guiding the first laser to the second light splitting and combining device, the second wavelength conversion element is used for guiding the second laser to the second light splitting and combining device, the second light splitting and combining device further comprises a second light splitting film arranged on one side, far away from the first light splitting and combining device, of the at least one other transparent substrate, the second light splitting film is further used for transmitting the first laser receiving light so that the first laser receiving light is guided to the light emitting channel, and the second light splitting film is further used for reflecting the second laser receiving light so that the second laser receiving light is guided to the light emitting channel.

21. A light source system as recited in claim 20, wherein: the light source system further comprises a guiding device, the guiding device receives the third excitation light emitted by the light processing device, the first lasing light emitted by the first wavelength conversion element and the second lasing light emitted by the second wavelength conversion element, and guides the third excitation light, the first lasing light and the second lasing light to the light emitting channel, the guiding device comprises a guiding element and a light combining element, the guiding element receives the first lasing light transmitted by the second light splitting film and the second lasing light reflected by the second light splitting film and guides the first lasing light and the second lasing light to the light combining element, and the first light splitting and light combining device further transmits the third excitation light emitted by the light processing device to the light combining element, and the light combining element combines the first lasing light, the second lasing light and the third excitation light.

22. A light source system as recited in claim 17, wherein: the light processing device transmits and scatters the second light to convert the second light into the third excitation light, the first wavelength conversion element and the second wavelength conversion element are both transmission type wavelength conversion devices, the light source system further comprises a guiding device, the guiding device receives the third excitation light emitted by the light processing device, the first lasing light emitted by the first wavelength conversion element and the second lasing light emitted by the second wavelength conversion element, and guides the third excitation light, the first lasing light and the second lasing light to the light emitting channel.

23. A light source system as recited in claim 22, wherein: the guiding device comprises a first guiding element, a second guiding element, a first light combining element and a second light combining element, wherein the first guiding element receives the third excitation light and guides the third excitation light to the first light combining element, the first wavelength conversion element guides the first laser light to the first light combining element, the first light combining element guides the first laser light and the third excitation light to the second light combining element, the second guiding element receives the second part of light emitted by the second light splitting and combining device and guides the second part of light to the second wavelength conversion element, the second wavelength conversion element guides the second laser light to the second light combining element, and the second light combining element guides the third excitation light, the first laser light and the second laser light to the light emitting channel.

24. A light source system as recited in claim 23, wherein: the light source system further comprises a first supplementary light source and a second supplementary light source, the first supplementary light source emits first supplementary light, the first supplementary light is guided to the first light splitting and combining device, the first light splitting and combining device further guides the first supplementary light to the light emitting channel through the light processing device and the guiding device, the second supplementary light source emits second supplementary light, the second supplementary light is guided to the second light splitting and combining device, and the second light splitting and combining device further guides the second supplementary light to the light emitting channel through the wavelength conversion device.

25. A light source system as recited in claim 24, wherein: the light source system further includes a third supplemental light source that emits a third supplemental light that is directed to the second guiding element, which also directs the third supplemental light to the light-emitting channel via the second light-combining element.

26. A light source system as recited in claim 2, wherein: the light source device comprises a light combining device and a light homogenizing device, the light combining device transmits one of the first excitation light and the second excitation light and reflects the other one of the first excitation light and the second excitation light, so that the first excitation light and the second excitation light are combined and provided to the light homogenizing device, and the light homogenizing device is positioned between the light combining device and the first light splitting and combining device and is used for homogenizing the first excitation light and the second excitation light emitted by the light combining device and guiding the homogenized first excitation light and the second excitation light to the first light splitting and combining device.

27. A display device comprising a light source system, characterized in that: the light source system employing the light source system according to any one of claims 1 to 26.