CN108931878B

CN108931878B - Light source system and display device

Info

Publication number: CN108931878B
Application number: CN201710384212.8A
Authority: CN
Inventors: 胡飞; 侯海雄; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2017-05-26
Filing date: 2017-05-26
Publication date: 2021-07-23
Anticipated expiration: 2037-05-26
Also published as: WO2018214288A1; CN108931878A

Abstract

The invention relates to a light source system and a display device. The light source system comprises a first light source, a wavelength conversion device and a guide device; the first light source is used for emitting exciting light; the wavelength conversion device comprises a first section and a second section, wherein the first section and the second section are positioned on the light path of the exciting light in a time-sharing manner; the first section is used for receiving the exciting light, generating stimulated light and reflecting the stimulated light along a first light path; the second section is used for reflecting the exciting light along a second light path which is not coincident with the first light path; the guiding device is used for guiding the excited light and/or the excited light reflected by the second section to a light outlet 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 increasingly used in the fields of display (such as projection) and illumination, and have the advantages of high energy density and small optical expansion, so that in the field of high-brightness light sources, the laser light sources have gradually replaced bulbs and LED light sources. In the light source system, the first light source is adopted to excite the phosphor to generate the required light (for example, blue light laser excites yellow phosphor to generate white light), and the light source system has the advantages of high luminous efficiency, good stability, low cost and the like, and becomes the mainstream of application. However, how to further reduce the size of the light source system is one of the important issues to be solved in the industry, and particularly for the light source system used in the micro-projection field, the light source system with smaller size is more conducive to the miniaturization of the terminal, and the possibility of battery-driven micro-projection field is also possible.

Disclosure of Invention

In view of the above, it is desirable to provide a light source system with a small size, and a display device using the light source system.

A light source system comprises a first light source, a wavelength conversion device and a guiding device; the first light source is used for emitting exciting light; the wavelength conversion device comprises a first section and a second section, wherein the first section and the second section are positioned on the light path of the exciting light in a time-sharing manner; the first section is used for receiving the exciting light, generating stimulated light and reflecting the stimulated light along a first light path; the second section is used for reflecting the exciting light along a second light path which is not coincident with the first light path; the guiding device is used for guiding the excited light and/or the excited light reflected by the second section to a light outlet channel.

A display apparatus comprising a light source system comprising a first light source, a wavelength conversion device and a guiding device; the first light source is used for emitting exciting light; the wavelength conversion device comprises a first section and a second section, wherein the first section and the second section are positioned on the light path of the exciting light in a time-sharing manner; the first section is used for receiving the exciting light, generating stimulated light and reflecting the stimulated light along a first light path; the second section is used for reflecting the exciting light along a second light path which is not coincident with the first light path; the guiding device is used for guiding the excited light and/or the excited light reflected by the second section to a light outlet channel.

Compared with the prior art, the wavelength conversion device is beneficial to separating the light paths of the exciting light and the stimulated light, so that the stimulated light and the exciting light are respectively guided to the light outlet channel from the non-coincident light paths, elements of a light source system adopting the wavelength conversion device are compact, the size is small, and the wavelength conversion device is more suitable for the micro-projection field.

Drawings

Fig. 1 and 2 are schematic structural diagrams of a light source system according to a first embodiment of the present invention.

Fig. 3 is a schematic plan view of a wavelength conversion device of the light source system shown in fig. 1.

Fig. 4 is a schematic cross-sectional view taken along line IV-IV in fig. 3.

Fig. 5 and 6 are schematic structural diagrams of a light source system according to a second embodiment of the present invention.

Fig. 7 and 8 are schematic structural views of a light source system according to a third embodiment of the present invention.

Fig. 9 is a schematic diagram of the blocking characteristics of the band-stop filter element shown in fig. 7.

Fig. 10 and 11 are schematic structural views of a light source system according to a fourth embodiment of the present invention.

Fig. 12 is a schematic plan view of the light splitting and combining element shown in fig. 10.

Fig. 13 and 14 are schematic structural views of a light source system according to a fifth embodiment of the present invention.

Fig. 15 and 16 are schematic structural views of a light source system according to a sixth embodiment of the present invention.

Fig. 17 and 18 are schematic structural views of a light source system according to a seventh embodiment of the present invention.

Fig. 19 and 20 are schematic structural views of a light source system according to an eighth embodiment of the present invention.

Fig. 21 and 22 are schematic structural views of a light source system according to a ninth embodiment of the present invention.

Fig. 23 and 24 are schematic structural views of a light source system according to a tenth embodiment of the present invention.

Fig. 25 is a schematic plan view of a wavelength conversion device of the light source system shown in fig. 23.

Fig. 26 is a schematic plan view of a wavelength conversion device according to an embodiment of the present invention.

Fig. 27 is a schematic cross-sectional view of fig. 26.

Fig. 28 is a schematic side view of a wavelength conversion device according to still another embodiment of the present invention.

Fig. 29 is a schematic side view of another embodiment of a wavelength conversion device according to the present invention.

Fig. 30 is a schematic side view of another embodiment of a wavelength conversion device according to the present invention.

Fig. 31 is a schematic side view of another embodiment of a wavelength conversion device according to the present invention.

FIG. 32 is a block diagram of a display device according to a preferred embodiment of the present invention.

Description of the main elements

Light source systems

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 61

First light source

110, 210, 410, 610, 710, 810

Light splitting and combining

element

120, 220, 420, 620, 721, 820, 1120

Wavelength conversion devices

130, 330, 430, 630, 730, 830, 1130, 1230, 1330, 1430, 1530

Guiding means 140, 640, 740, 840, 940, 1140

Light evening device

150, 350

Collimating lenses

101, 144, 145, 201

Collecting

lenses

103, 104, 143

Relay lenses

106, 306

Light-

exiting channels

108, 408, 508, 608, 1108

First surface 121

Second surface 122

First segment

131, 631, 731, 831, 1131

Second section

132, 632, 732, 832, 1132

First segmented region 131a

Second segment region 131b

Vacant region 132a

Reflective elements

141a, 141b

Diffuser 142

Dodging

device

202, 402

Band-stop filter element 309

Second light source 460

Guide element 461

Light combining element 462

First segment 420a

Second segment 420b

Compound eye system 550

Display device 60

Opto-mechanical system 62

Projection lens 63

Excitation light

171, 471

Stimulated

light

172, 472

Light combination

173, 473

Supplemental light 474

First reflective region 131a

Second reflective region 132b

Substrate 133, 933

First surfaces

133a, 733a, 933a, 1133a

Second surfaces

133b, 733b, 933b

Side surfaces 133c, 7331, 7332, 933c

Inclined surfaces

133d, 733d, 933d

First portions

133e, 733e

Second portions

133f, 733f

Light splitting element 721

Light combining element 722

Concave 934

Counter surface 935

First region 1120a

Second region 1120b

Hypotenuse regions

1031, 1231, 1331, 1332, 1431, 1531

Empty slots

1032, 1232

Mass 1432

Fence 1532

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

Detailed Description

Referring to fig. 1 and 2, fig. 1 and 2 are schematic structural diagrams of a light source system 100 according to a first embodiment of the present invention, wherein fig. 1 and 2 are schematic optical path diagrams of the light source system 100 at two different time periods, respectively. The light source system 100 includes a first light source 110, a light splitting and combining element 120, a wavelength conversion device 130, a guiding device 140, a light homogenizing device 150, a collimating lens 101, collecting

lenses

103 and 104, and a relay lens 106.

The first light source 110 is used for emitting excitation light, and may be a semiconductor diode or a semiconductor diode array, such as a Laser Diode (LD) or a Light Emitting Diode (LED). The excitation light may be blue light, violet light, ultraviolet light, or the like, but is not limited thereto. In this embodiment, the first light source 110 includes a blue semiconductor laser diode for emitting blue laser light as the excitation light. In this embodiment, the light source brightness of the light source system 100 using one laser light source and combining with the light splitting and combining element 120, the wavelength conversion device 130, the guiding device 140, etc. can reach the brightness achieved by using three or more laser light sources in the prior art. Meanwhile, the number of the used light sources is small, only one laser light source is used, and the battery can be used for supplying power to the light source, the motor and other devices. The light source system 100 is powered by a battery, so that a projection device adopting the light source system 100 is convenient to carry and can be used in any occasions.

The collimating lens 101 is located on a light path where the excitation light emitted by the first light source 110 is located, and specifically, the collimating lens 101 may be disposed between the first light source 110 and the light splitting and combining element 120, and is configured to collimate the excitation light emitted by the first light source 110 and provide the collimated excitation light to the light splitting and combining element 120. It is understood that, in a modified embodiment, the collimating lens 101 may be omitted, so that the excitation light emitted from the first light source 110 is directly provided to the light splitting and combining element 120.

The light splitting and combining element 120 may also be disposed on a light path where the excitation light emitted by the first light source 110 is located, and is configured to receive the excitation light emitted by the first light source 110 and reflect the excitation light to the wavelength conversion device 130, so that the wavelength conversion device 130 converts a part of the excitation light into stimulated light and guides another part of the excitation light to the guiding device 140, and the light splitting and combining element 120 is further configured to receive the stimulated light emitted by the wavelength conversion device 130 and transmitted to the light emitting channel 108, and guide the guiding device 140 to reflect another part of the excitation light on a side of the light splitting and combining element 120 adjacent to the light emitting channel 108. Specifically, in this embodiment, the light splitting and combining element 120 may receive the excitation light emitted by the first light source 110 through the collimating lens 101.

Further, the light splitting and combining element 120 includes a first surface 121 and a second surface 122 opposite to the first surface 121, where the first surface is a surface adjacent to a side of the first light source 110 and the wavelength conversion device 130, and the second surface 122 is a surface adjacent to a side of the light exit channel 108. The first surface 121 receives and reflects the excitation light emitted from the first light source 110, and the first surface 121 also receives the stimulated light emitted from the wavelength conversion device 130 so that the stimulated light is transmitted to the light-emitting channel 108. The second surface 122 receives the another part of the excitation light guided by the guiding device 140 and reflects the another part of the excitation light to the light-exiting channel 108. It can be understood that the light emitted from the second surface 122 of the light splitting and combining element 120 (i.e., the light of the light exiting channel 108) is the combined light of the stimulated light and the other part of the excitation light.

As can be seen from the above, in the present embodiment, the light splitting and combining element 120 reflects the excitation light and transmits the stimulated light, specifically, the light splitting and combining element 120 may reflect light with a wavelength less than a first preset value and transmit light with a wavelength greater than the first preset value, where the first preset value may be between 480 nanometers and 485 nanometers. In other words, the light splitting and combining element 120 may be a film that reflects blue light and transmits red light, green light and yellow light, and may be disposed obliquely at an angle of 45 degrees with respect to both the light emitting surface of the first light source 110 and the light emitting surface of the excited light of the wavelength conversion device 130, and the maximum wavelength of the blue light reflected by the light splitting and combining element 120 may be between 480 nanometers and 485 nanometers.

The wavelength conversion device 130 is located on a light path where the excitation light reflected by the light splitting and combining element 120 is located, and is configured to receive the excitation light reflected by the light splitting and combining element 120 and convert a part of the excitation light into stimulated light, and the wavelength conversion device 130 is further configured to reflect another part of the excitation light. Specifically, the wavelength conversion device 130 can receive the excitation light through the

collection lenses

103 and 104, collect and collimate a part of the excitation light converted by the excitation light through the

collection lenses

103 and 104, and provide the collimated excitation light to one of the light splitting and combining element 120 and the guiding device 140, and reflect another part of the excitation light to the other of the light splitting and combining element 120 and the guiding device 140.

In this embodiment, the wavelength conversion device 130 is a reflective wavelength conversion device, such as a reflective color wheel, which has an advantage of sufficient heat dissipation space. In order to further improve the heat dissipation effect of the wavelength conversion device 130, a heat dissipation assembly may be disposed on another surface of the wavelength conversion device 130 (i.e., a surface opposite to the light emitting surface of the wavelength conversion device 130). For example, heat dissipation fins are disposed on the other side of the wavelength conversion device 130, and the heat dissipation fins may be in the shape of circular rings, columnar protrusions, sheet-like protrusions, and the like distributed along the circumference.

Referring to fig. 3 and fig. 4, fig. 3 is a schematic plan view of the wavelength conversion device 130 adjacent to the light splitting and combining element 120, and fig. 4 is a schematic cross-sectional view along line III-III of fig. 3. The light emitting surface 133a of the wavelength conversion device 130 includes a first section 131 and a second section 132. The first section 131 and the second section 132 are sequentially arranged in a segment region along a circumferential direction. The first section 131 and the second section 132 are located on the light path where the excitation light reflected by the light splitting and combining element 120 is located in a time-sequential manner; the first segment 131 is configured to receive the excitation light, generate stimulated light, and reflect the stimulated light along a first optical path; the second section 132 is configured to reflect the excitation light along a second light path that does not coincide with the first light path. One of the excited light generated by the first segment 131 and the excited light reflected by the second segment 132 is guided to the light splitting and combining element 120 through the guiding device 140, the other of the excited light generated by the first segment 131 and the excited light reflected by the second segment 132 is guided to the light splitting and combining element 120, and the light splitting and combining element 120 combines the excited light generated by the first segment 131 and the excited light reflected by the second segment 132 by using a wavelength combining method.

In this embodiment, the first segment 131 receives the excitation light emitted from the light splitting and combining element 120 at a first time period, generates the received laser light, and reflects the received laser light to the light splitting and combining element 120. The first segment 131 includes a first reflection region 131c for generating the stimulated light, the second segment 132 includes a second reflection region 132b for reflecting the excitation light, and the second reflection region 132b is disposed obliquely with respect to the first reflection region 131 a.

Specifically, the wavelength conversion device 130 includes a substrate 133, where the substrate 133 includes a first surface 133a, a second surface 133b opposite to the first surface 133a, a side surface 133c connected between the first surface 133a and the second surface 133b, and an inclined surface 133d, the first surface 133a and the second surface 133b are parallel to each other, and the side surface 133c is perpendicular to the first surface 133a and the second surface 133 b. The substrate 133 is divided into the first section 131 and the second section 132 sequentially along a direction perpendicular to the first surface 133a, the first surface 133a includes a first portion 133e corresponding to the first section 131 and a second portion 133f corresponding to the second section 132, and the inclined surface 133d is inclined with respect to the first surface 133a (e.g., inclined at an angle of 45 degrees). Wherein the inclined surface 133d serves as the first reflective region 131c to generate the stimulated light and the second portion 133f serves as the second reflective region 132b to reflect the stimulated light; alternatively, in the modified embodiment, the first portion 133e serves as the first reflection region 131c to generate the excitation light, and the inclined surface 133d serves as the second reflection region 132b to reflect the excitation light.

Specifically, in the present embodiment, the side surface 133c includes a first side surface 1331 corresponding to the first section 131 and a second side surface 1332 corresponding to the second section 132, the inclined surface 133d is connected between the second portion 133f of the first surface 133a and the second side surface 1332, and the inclined surface 133d forms an obtuse angle (e.g., an obtuse angle of 135 degrees) with the second portion 133f of the first surface 133a and the second side surface 1332. In a modified embodiment, the side surface 133c corresponds to the first section 131, the inclined surface 133d corresponds to the second section 132 and is connected between the second portion 133e of the first surface 133a and the second surface 133b, the inclined surface 133d forms an obtuse angle (e.g., an obtuse angle of 135 degrees) with the second portion 133e of the first surface 133a, and the inclined surface 133d forms an acute angle (e.g., an acute angle of 45 degrees) with the second surface 133 b.

The number of the first segments 131 may be one, two, or more, and may be specifically determined according to actual needs, and in this embodiment, the number of the first segments 131 may be two, and the first segments are respectively a first segment area 131a and a second segment area 131 b. Specifically, the first segment region 131a, the second segment region 131b and the second segment 132 are sequentially arranged along the circumferential direction and are connected end to end. The first segment region 131a is provided with a first fluorescent material and is configured to emit stimulated light of a first color, and the second segment region 131b is provided with a second fluorescent material and is configured to emit stimulated light of a second color, so that the stimulated light emitted by the wavelength conversion device 130 includes the stimulated light of the first color and the stimulated light of the second color. In this embodiment, the excitation light is blue excitation light, the first fluorescent material is a red fluorescent material, the first color is red, the second fluorescent material is a green fluorescent material, and the second color is green.

The second segment 132 receives the excitation light emitted from the light splitting and combining element 120 in a second period of time, and reflects the excitation light to the guiding device 140. The second segment 132 further includes a vacant region 132a, and it is understood that in this embodiment, the vacant region 132a is defined by the second portion 133f of the first surface 133a, so that the vacant region 132a and the first segment 131 are located on the same plane, the second reflective region 132b is located outside the vacant region 132a, and the second reflective region 132b is obliquely connected to the surface of the vacant region 132a at an obtuse angle, so that the second reflective region 132b is also obliquely arranged at an obtuse angle relative to the first segment 131, wherein the obtuse angle may be 135 degrees, 140 degrees, 150 degrees, and so on.

In one embodiment, the vacant areas 132a and the second reflective areas 132b can be integrally formed, for example, the vacant areas 132a and the second reflective areas 132b are made of ceramic substrate or glass substrate, or made of other materials, and then the reflective film is plated or attached on the second reflective areas 132 b. Further, the surface of the second segment 132 for reflecting the excitation light (i.e., the surface of the reflection region 132) is also coated with a light-diffusing film for decoherence while reflecting the excitation light.

When the light source system 100 operates, the wavelength conversion device 130 may periodically rotate around a circle center thereof, so that the first segment 131 (including the first segment region 131a and the second segment region 131b) and the second reflection region 132b of the second segment 132 are located on a light path where the excitation light reflected by the light splitting and combining element 120 is located at different time intervals and periodically, and thus the first segment 131 and the second reflection region 132b periodically convert the excitation light into the stimulated light or reflect the excitation light to the guiding device 140, and finally the light splitting and combining element 120 periodically emits the stimulated light and the excitation light, and the light source system 100 emits the stimulated light and the excitation light at a predetermined time sequence.

In this embodiment, the wavelength conversion device 130 reflects the blue excitation light by using the second reflection region 132b in an inclined plane, so that the light utilization rate of the wavelength conversion device 130 can be increased to 95%, and meanwhile, due to the increase of the light utilization rate, the wavelength conversion device 130 can reduce the area of the second reflection region 132b reflecting the blue excitation light, increase the area of the first segment 131 (including the first segment region 131a and the second segment region 131b), and on the basis of achieving the same light quantity and light intensity as those in the prior art, the planar area of the wavelength conversion device 130 can be smaller, so that the light source system using the wavelength conversion device 130 has a smaller volume and a more compact structure.

The guiding device 140 is used for guiding the excited light generated by the first segment 131 and/or the excited light reflected by the second segment 132 to the light-emitting channel. In this embodiment, the guiding device 140 guides the excitation light reflected by the second segment 132 to the light-emitting channel. Further, the guiding device 140 focuses the excitation light reflected by the second segment 132, and scatters the focused excitation light to be incoherent, and the scattered excitation light is guided to the light splitting and combining element 120.

Specifically, the guiding device 140 guides the (reflected) excitation light provided by the wavelength conversion device 130 to a side of the light splitting and combining element 120 adjacent to the light-emitting channel 108 (i.e., the second surface 122 of the light splitting and combining element 120), and then the light splitting and combining element 120 reflects the excitation light to the light-emitting channel 108. Specifically, the guiding device 140 includes reflecting

elements

141a and 141b, and the excitation light reflected by the wavelength conversion device 130 is reflected by the reflecting

elements

141a and 141b to the second surface 122 of the light splitting and combining element 120 on the side adjacent to the light exit channel 108.

In this embodiment, the guiding device 140 further includes the at least one reflecting element and the light diffuser 142, the light diffuser 142 is used for scattering and decoherence of the excitation light guided by the guiding device 140, the excitation light reflected by the second segment 132 is guided to the light splitting and combining element 120 by the at least one reflecting element and the light diffuser 142, and the light diffuser is used for scattering and decoherence of the excitation light reflected by the second segment 132. In this embodiment, the reflective element of the guiding device 140 includes a first reflective element 141a and a second reflective element 141b, the light diffuser 142 is located between the first reflective element 141a and the second reflective element 141b, the first reflective element 141a reflects the excitation light emitted from the wavelength conversion device 130 to the light diffuser 142, the light diffuser 142 transmits the excitation light emitted from the first reflective element 141a, scatters the excitation light to be decohered, and provides the scattered excitation light to the second reflective element 141b, and the second reflective element 141b reflects the scattered decohered excitation light of the light diffuser 142 to a second surface of the light splitting and combining element 120 adjacent to the light emitting channel 108.

Still further, at least one of the first and second

reflective elements

141a and 141b may include a reflective film, and the guiding device 140 further includes a scattering layer disposed on the reflective film, scattering particles disposed in the reflective film, or a scattering surface on an upper surface or a lower surface of the reflective film, so that the guiding device 140 scatters the received light (e.g., the excitation light reflected by the second segment).

Further, the guiding device 140 may further include a first relay lens and a second relay lens. The first relay lens is located between the wavelength conversion device 130 and the first reflecting element 141a, and is configured to perform processing such as collection, collimation, and shaping on the excitation light emitted by the wavelength conversion device 130, and the second relay lens is located between the second reflecting element 141b and the light splitting and combining element 120, and is configured to perform processing such as collection, collimation, and shaping on the excitation light reflected by the first reflecting element 141 a. In this embodiment, the guiding device 140 includes a collecting lens 143, a collimating lens 144, and a collimating lens 145. The collecting lens 143 and the collimating lens 144 are sequentially disposed between the wavelength conversion device 130 and the first reflective element 141a, and are configured to sequentially collect and collimate the excitation light emitted by the wavelength conversion device 130, so as to provide the collected and collimated excitation light to the first reflective element 141 a. The collimating lens 145 is disposed between the second reflecting element 141b and the light splitting and combining element 120, and is configured to collimate the excitation light scattered by the light diffuser 142 and reflected by the second reflecting element 141b, so as to provide the collimated excitation light to the light splitting and combining element 120.

It can be understood that the first surface 121 of the light splitting and combining element 120 is opposite to and parallel to the second reflection area 132b of the wavelength conversion device 130, the second reflection area 132b of the wavelength conversion device 130 may correspond to and be perpendicular to the reflection surface of the first reflection element 141a, the reflection surface of the first reflection element 141a may correspond to and be perpendicular to the reflection surface of the second reflection element 141b, the light diffuser 142 may be obliquely disposed at an angle of 45 degrees with respect to the reflection surface of the first reflection element 141a and the reflection surface of the second reflection element 141b, and the reflection surface of the second reflection element 141b may be parallel to the second surface 122 of the light splitting and combining element 120.

The second surface 122 of the light splitting and combining element 120 receives the excitation light reflected by the second reflecting element 141b and reflects the excitation light to the light emitting channel 108. The light uniformizing device 150 may be disposed on one side of the second surface 122 of the light splitting and combining element 120 and adjacent to the light emitting channel 108, and is configured to perform light uniformizing and other processing on the stimulated light and the excitation light of the light emitting channel 108, so as to provide the homogenized stimulated light and excitation light to a subsequent optical module of a projection system for processing and use. The light uniformizing device 150 may be a light uniformizing square rod, and includes an inlet for receiving the stimulated light and the excitation light and an outlet for emitting the homogenized stimulated light and the excitation light. In this embodiment, the dodging device 150 further receives the stimulated light and the excitation light through the relay lens 106, that is, after the relay lens 106 collects or shapes the stimulated light and the excitation light emitted by the beam splitting and combining element 120, the light spots of the stimulated light and the excitation light are imaged on the entrance of the dodging device 150, so as to improve the light utilization rate.

Compared with the prior art, in the light source system 100 of the present invention, the light splitting and combining element 120 reflects the excitation light to the wavelength conversion device 130, transmits the stimulated light to the light-emitting channel 108, and reflects the excitation light guided by the guiding device 140 to the light-emitting channel 108, so that the elements of the light source system 100 are compact and have a small volume, and are more suitable for the micro-projection field.

Further, the wavelength conversion device 130 is beneficial to separate the optical paths of the excitation light and the stimulated light, so that the light splitting and combining element 120 can transmit the stimulated light to the light-emitting channel and can reflect the excitation light guided by the guiding device 140 to the light-emitting channel 108. Meanwhile, the wavelength conversion device 130 also enables the emitted laser to have better color and brighter brightness, and the emitted light does not need to be color-corrected by arranging a color correction wheel on the emitting light path of the wavelength conversion device 130. Further, the light source system 100 using the wavelength conversion device 130 is compact in size and small in size, and is more suitable for the micro-projection field.

In addition, the wavelength conversion device 130 and the guiding device 140 separate and guide the optical paths of the excitation light and the stimulated light, so that the light splitting and combining element 120 combines the stimulated light generated by the wavelength conversion device 130 and the excitation light guided by the guiding device 140 in a wavelength combining manner, the stimulated light and the excitation light provided to the light emitting channel by the light splitting and combining element 120 can be more uniform, and compared with some existing light splitting and combining elements which guide the excitation light through a region coating, the phenomenon of uneven color loss and the like of a region generated by guiding the excitation light through the region coating can be avoided, so that the excitation light provided to the light emitting channel by the light splitting and combining element 120 is more uniform.

In addition, as mentioned above, the brightness of the light source emitted by the light source system composed of one laser light source and the beam splitting and combining element 120, the wavelength conversion device 130, the guiding device 140, etc. can reach the brightness achieved by using three or more laser light sources in the prior art. Meanwhile, the number of the used light sources is small, only one laser light source is used, and the battery can be used for supplying power to the light source, the motor and other devices. The light source system 100 is powered by a battery, so that a projection device adopting the light source system 100 is convenient to carry and use. Further, the wavelength conversion device 130 reflects the blue excitation light by using the second reflection region 132b in an inclined plane manner, which not only improves the utilization rate, but also reduces the area of the second reflection region 132b that reflects the blue excitation light in the entire wavelength conversion device 130, increases the area of the first section 131, and can reduce the planar area of the wavelength conversion device 130 on the basis of achieving the same light quantity and light intensity as those in the prior art, so that the light source system using the wavelength conversion device 130 has a smaller volume and a more compact structure.

Referring to fig. 5 and 6, fig. 5 and 6 are schematic structural diagrams of a light source system 200 according to a second embodiment of the present invention, wherein fig. 5 and 6 are schematic optical path diagrams of the light source system 200 at two different time periods, respectively. The structure of the light source system 200 is substantially the same as that of the light source system 100 of the first embodiment, that is, the above description of the light source system 100 can be substantially applied to the light source system 200, and the difference between the two is mainly that: the light source system 200 further includes a light uniformizing device 202, where the light uniformizing device 202 is located between the first light source 210 and the light splitting and combining element 220 and is configured to perform light uniformizing on the excitation light emitted by the first light source 210, and specifically, the light uniformizing device 202 may be located between the collimating lens 201 and the light splitting and combining element 220 and perform light uniformizing on the excitation light collimated by the collimating lens 201.

Referring to fig. 7 and 8, fig. 7 and 8 are schematic structural diagrams of a light source system 300 according to a third embodiment of the present invention, wherein fig. 7 and 8 are schematic optical path diagrams of the light source system 300 at two different time periods, respectively. The structure of the light source system 300 is substantially the same as that of the light source system 200 of the second embodiment, that is, the above description of the light source system 200 can be substantially applied to the light source system 300, and the difference between the two is mainly that: the first fluorescent material of the first segment region of the light source system 300 is a yellow fluorescent material (red fluorescent material in the first and second embodiments), that is, in the present embodiment, the yellow fluorescent material is used to replace the red fluorescent material in the first and second embodiments; the light source system 300 further includes a band-stop filter element 309, and the band-stop filter element 309 filters the yellow stimulated light generated by the wavelength conversion device 330 to filter out a green portion of the yellow stimulated light, so as to convert the yellow stimulated light generated by the yellow fluorescent material into red stimulated light.

Specifically, referring to fig. 9, fig. 9 is a schematic diagram of the blocking characteristic of the band-stop filter element 309 shown in fig. 7. The band stop filter element 309 blocks light having a wavelength between 580 nm and 620 nm (i.e. green light generated by the yellow fluorescent material) from passing through. The band-elimination filter element 309 may further filter the green excited light generated by the second fluorescent material (such as green fluorescent material) in the second segment region to remove the light with the wavelength of 580 nm to 620 nm, so as to modify the wavelength tail of the green excited light generated by the second fluorescent material (such as green fluorescent material) to improve the color expression of green.

In this embodiment, the band-stop filter element 309 receives the stimulated light of the light-emitting channel 308 for filtering out part of the green light (e.g. light with a wavelength of 580 nm to 620 nm), and specifically, the band-stop filter element 309 may be located between the relay lens 306 and the light unifying device 350, e.g. at the entrance of the light unifying device 350 adjacent to one side of the relay lens 306, and in close contact with the light unifying device 350.

Referring to fig. 10, 11 and 12, fig. 10 and 11 are schematic structural diagrams of a light source system 400 according to a fourth embodiment of the present invention, where fig. 10 and 11 are schematic optical path diagrams of the light source system 400 at two different time periods, respectively, and fig. 12 is a schematic plan structural diagram of the light splitting and combining element shown in fig. 10. The structure of the light source system 400 is substantially the same as that of the light source system 200 of the second embodiment, that is, the above description of the light source system 200 can be substantially applied to the light source system 400, and the difference between the two is mainly that: the light source system 400 further includes a second light source 460, a guiding element 461, a light combining element 462; and the structure of the light splitting and combining element 420 is also different.

In this embodiment, the second light source 460 is configured to emit supplementary light, the supplementary light emitted by the second light source 460 is guided to the light combining element 462 by the guiding element 461 after passing through the collimating lens, and the light combining element 462 receives the supplementary light guided by the guiding element 461 and receives the excitation light emitted by the first light source 410 and provides both the supplementary light and the excitation light to the light splitting and combining element 420 through the light homogenizing device 402.

In the present embodiment, the supplementary light is a red laser light, but it is to be understood that in other embodiments, other color light such as green light may be used. The guiding element 461 is a reflective element, and the light combining element 462 transmits the excitation light and reflects the supplement light. The supplementary light emitted by the second light source 460 is reflected by the guiding element 461 to the light combining element 462 after passing through the collimating lens, the light combining element 462 receives the supplementary light reflected by the guiding element 461 and reflects the supplementary light to the light splitting and combining element 420, and the light combining element 462 receives the excitation light emitted by the first light source 410 and transmits the excitation light to the light splitting and combining element 420.

The light splitting and combining element 420 includes a first section 420a and a second section 420b, the first section 420a receives the excitation light and the complementary light and reflects the excitation light and the complementary light to the wavelength conversion device 430, the wavelength conversion device 430 converts a part of the excitation light into the stimulated light and reflects the stimulated light and the complementary light to the second section 420b, and the second section 420b transmits the stimulated light and the complementary light to the light emitting channel 408. It can be understood that, as shown in fig. 7, the light emitted from the light splitting and combining element 420 (i.e., the light of the light emitting channel 408) is a combined light of the supplemental light, the stimulated light and the other part of the excitation light.

Specifically, the first segment 420a is located at the center of the light splitting and combining element 420, and the second segment 420b is located at the periphery of the first segment 420 a. The first segment 420a is a region that reflects the excitation light emitted from the first light source 410 and reflects the supplement light emitted from the second light source 460, and specifically, a region that reflects blue light and reflects red light. The second segment 420b is an area that reflects blue light and transmits other color light (e.g., red light, green light, and yellow light), and specifically, the second segment 420b may reflect light having a wavelength less than a first preset value and transmit light having a wavelength greater than the first preset value, where the first preset value may be between 480 nanometers and 485 nanometers.

The second light source 460 may be turned on only when the wavelength conversion device 430 emits the excited light with the same color as the complementary light or emits the excited light with the color component of the complementary light, and in this embodiment, the second light source 460 may be turned on during a period when the first segment region of the wavelength conversion device 430 emits the red excited light or the yellow excited light, and turned off during a period when the second segment region of the wavelength conversion device 430 emits the green excited light and the wavelength conversion device 430 reflects the blue excited light, so that the color index of red can be improved, and the efficiency of the light source can be improved.

Referring to fig. 13 and 14, fig. 13 and 14 are schematic structural diagrams of a light source system 500 according to a fifth embodiment of the present invention, wherein fig. 13 and 14 are schematic optical path diagrams of the light source system 500 at two different time periods, respectively. The structure of the light source system 500 is substantially the same as that of the light source system 400 of the fourth embodiment, that is, the above description of the light source system 400 can be substantially applied to the light source system 500, and the difference between them is mainly that: the light homogenizing device of the light source system 500 is a fly-eye system 550 (such as a fly-eye lens or a fly-eye lens, etc.), and the fly-eye system 550 is configured to homogenize the stimulated light and the supplemental light of the light outgoing channel 508 with another portion of the excitation light. Compared with a light homogenizing device such as a light homogenizing square rod, the compound eye system can better homogenize light, so that a more uniform light beam is provided for a subsequent light source system. In addition, the light emitted from the compound eye system 550 is more suitable for an optical mechanical system in the projection field (including micro-projection field), which can perform image modulation on the light source light emitted from the light source system 500 according to the image data to generate the projection light required for displaying the image.

Referring to fig. 15 and 16, fig. 15 and 16 are schematic structural diagrams of a light source system 600 according to a sixth embodiment of the present invention, where fig. 15 and 16 are schematic optical path diagrams of the light source system 600 at two different time periods, respectively. The structure of the light source system 600 is substantially the same as that of the light source system 100 of the first embodiment, that is, the above description of the light source system 100 can be substantially applied to the light source system 600, and the difference between the two is mainly that: the position of the first light source 610 and the structure of the light splitting and combining element 620 are different, so that the light path of the light source system 600 is slightly different.

Specifically, the light splitting and combining element 620 is a dichroic plate that transmits the excitation light and reflects the stimulated light. As shown in fig. 15, in a first period of time, the excitation light emitted by the first light source 610 is transmitted to the first section 631 of the wavelength conversion device 630 by the light splitting and combining element 620, the first section 631 converts the excitation light into stimulated light and reflects the stimulated light to the light splitting and combining element 620, and the light splitting and combining element 620 further reflects the stimulated light to the light emitting channel. As shown in fig. 16, in the second period, the excitation light emitted from the first light source 610 is transmitted to the second segment 632 of the wavelength conversion device 630 by the light splitting and combining element 620, the second segment 632 reflects the excitation light to the guiding device 640, the guiding device 640 guides the excitation light to the light splitting and combining element 620, and the light splitting and combining element 620 further transmits the excitation light to the light exit channel.

It is understood that in this embodiment, the structure of the guiding device 640 may be the same as that in the first embodiment, and the detailed structure thereof will not be described herein. The first segment 631 may include two segment regions (e.g., a segment region carrying a red phosphor material and a segment region carrying a green phosphor material), the excited light may include a first excited light (e.g., a red excited light) and a second excited light (e.g., a green excited light), the first period may include a first sub-period and a second sub-period, the segment region carrying the red phosphor material may receive the excitation light and generate the first excited light in the first sub-period, and the segment region carrying the green phosphor material may receive the excitation light and generate the second excited light.

In this embodiment, the structure of the light splitting and combining element 620 is flexibly designed, so that the first light source 610 can be placed at a suitable position, which is beneficial for the light source system 600 to be matched with other systems, and the purpose of reducing the volume or compacting or properly placing each element is achieved.

Referring to fig. 17 and 18, fig. 17 and 18 are schematic structural diagrams of a light source system 700 according to a seventh embodiment of the present invention, wherein fig. 17 and 18 are schematic optical path diagrams of the light source system 700 at two different time periods, respectively. The structure of the light source system 700 is substantially the same as that of the light source system 100 of the first embodiment, that is, the above description of the light source system 100 can be substantially applied to the light source system 700, and the difference between them is mainly that: the position of the first light source 710, the structure of the light splitting and combining element 720, the structure of the guiding device 740, and the structure of the wavelength conversion device 730 are all different, so that the light path of the light source system 700 is also slightly different.

Specifically, the light splitting and combining element 720 further includes a light splitting element 721 and a light combining element 722, the light splitting element 721 is configured to guide (e.g., transmit) the excitation light emitted from the first light source 710 to the wavelength conversion device 730, and the light combining element combines the excitation light generated by the first section 731 and the excitation light reflected by the second section 732 by wavelength light combining.

The wavelength conversion device 730 includes a first surface 733a adjacent to the light splitting element 721, a second surface 733b opposite to the first surface 733a, a side surface, and an inclined surface 733 d. Wherein the sides include a first side 7331 corresponding to the first section 731 and a second side 7332 corresponding to the second section 732. The first surface 733a includes a first portion 733e corresponding to the first section 731 and a second portion 733f corresponding to the second section 732. The inclined surface 733d is connected between the second portion 733f of the first surface 733a and the second side surface 7332, the second side surface 7332 is higher than the first side surface 7331 and protrudes from the first surface 733a, the inclined surface 733d forms an obtuse angle with the second portion 733f of the first surface 733a, and the inclined surface 733d forms an acute angle with the second side surface 7332.

In a first time period, as shown in fig. 17, the light splitting element 721 guides (e.g., transmits) the excitation light emitted from the first light source 710 to a first section 731 of the wavelength conversion device 730, the first section 731 converts the excitation light into stimulated light and reflects the stimulated light to the light splitting element 721, the light splitting element 721 also guides (e.g., reflects) the stimulated light to the light combining element 722, and the light combining element 722 guides (e.g., transmits) the stimulated light to a light emitting channel.

In the second time interval, as shown in fig. 18, the light splitting element 721 guides (e.g., transmits) the excitation light emitted from the first light source 710 to the inclined surface 733d of the second section 732 of the wavelength conversion device 730, and the inclined surface 733d of the second section 732 reflects the excitation light to the guiding device 740. The guiding device 740 includes a reflecting element 741, the reflecting element 741 guides (e.g., reflects) the excitation light to the light combining element 722, and the light combining element 722 guides (e.g., reflects) the excitation light to the light exiting channel.

It is understood that the guiding device 740 can further include a diffuser 742, and the diffuser 742 can be disposed between the reflecting element 741 and the light combining element 742, and the diffuser can be used for scattering and decoherence of the excitation light reflected by the second segment 732.

In this embodiment, the light splitting and combining element 720, the wavelength conversion device 730 and the guiding device 740 are flexibly designed to facilitate the light source system 700 to be matched with other systems, so as to achieve the purpose of reducing the volume or placing the elements compactly or properly.

Referring to fig. 19 and 20, fig. 19 and 20 are schematic structural diagrams of a light source system 800 according to an eighth embodiment of the present invention, wherein fig. 19 and 20 are schematic optical path diagrams of the light source system 800 at two different time periods, respectively. The structure of the light source system 800 is substantially the same as that of the light source system 800 of the first embodiment, that is, the above description of the light source system 100 can be substantially applied to the light source system 800, and the difference between them is mainly that: the position of the first light source 810, the structure of the light splitting and combining element 820, and the structure of the wavelength conversion device 830 are different, so that the light path and the light exit channel 808 of the light source system 800 are also slightly different.

Specifically, the light splitting and combining element 820 is a dichroic plate that reflects excitation light and transmits stimulated light. The structure of the wavelength conversion device 830 is substantially the same as that of the wavelength conversion device 730 in the seventh embodiment, and the description thereof is omitted here.

In a first time period, the excitation light emitted by the first light source 810 is reflected by the light splitting and combining element 820 to a first section 831 of the wavelength conversion device 830, the first section 831 generates the received laser light and reflects the received laser light to the light splitting and combining element 820, and the light splitting and combining element 820 transmits the received laser light to the light exit channel. In the second time period, the excitation light emitted from the first light source 810 is reflected by the light splitting and combining element 820 to the second section 832 of the wavelength conversion device 830, the second section 832 reflects the excitation light to the guiding device 840, and the guiding device 840 guides the excitation light to the light splitting and combining element 830.

In this embodiment, the light splitting and combining element 820, the wavelength conversion device 830 and the guiding device 840 are flexibly designed to facilitate the light source system 800 to be matched with other systems, so as to achieve the purpose of reducing the volume or compact or proper placement of each element.

Referring to fig. 21 and 22, fig. 21 and 22 are schematic structural diagrams of a light source system 900 according to a ninth embodiment of the invention, wherein fig. 21 and 22 are schematic optical path diagrams of the light source system 900 at two different time periods, respectively. The structure of the light source system 900 is substantially the same as that of the light source system 700 of the seventh embodiment, that is, the above description of the light source system 700 can be substantially applied to the light source system 900, and the difference between them is mainly that: the wavelength conversion devices 930 are different in structure so that the optical paths of the light source system 900 are slightly different.

Specifically, a first surface 933a of a base 933 of the wavelength conversion device 930 is recessed into a second surface 933b to form a recess 934, and the recess 934 includes the inclined surface 933d and an opposing surface 935 opposing the inclined surface 933 d. In this embodiment, the cross section of the recess 935 is V-shaped, the inclined surface 933d is connected to the facing surface 935, the inclined surface 933d is further connected to a side surface 933c of the base 933, and the facing surface 935 is connected between the inclined surface 933d and the first surface 933 a.

In this embodiment, since the position of the inclined surface 933d is slightly different from that in the seventh embodiment, the angle of the excitation light reflected by the inclined surface 933d is slightly different from that in the seventh embodiment.

The position of the guiding device 940 is slightly different from that of the guiding device 740 in the seventh embodiment and the guiding device 140 in the first embodiment, but the structures are substantially the same, and detailed structures and optical paths thereof will not be described herein.

In this embodiment, the light source system 900 can be matched with other systems by flexibly designing the structures or positions of the wavelength conversion device 930 and the guiding device 930, so as to achieve the purpose of reducing the volume or placing each element compactly or properly.

Referring to fig. 23, fig. 24 and fig. 25, fig. 23 and fig. 24 are schematic structural diagrams of a modified embodiment of the light source system according to the first embodiment of the present invention, in which fig. 23 and fig. 24 are further schematic optical path diagrams of the light source system 1000 at two different time periods, respectively, and fig. 25 is a schematic plan structural diagram of the wavelength conversion device 1130 of the light source system 1000 shown in fig. 23. The structure of the light source system 1000 is substantially the same as that of the light source system 100 of the first embodiment, that is, the above description of the light source system 100 can be substantially applied to the light source system 1000, and the difference between the two is mainly that: the structure of the light splitting and combining element 1120 is different from that of the wavelength conversion device 1130, and the optical path of the light source system 1000 is also different.

Specifically, in this embodiment, the first region 1120a (e.g., the central region) of the light splitting and combining element 1120 receives the excitation light emitted by the first light source 1110 in a first period and guides the excitation light to the first section 1131 of the wavelength conversion device 1130, the first surface 1133a of the first section 1131 may not be provided with a fluorescent material, the first section 1131 scatters and reflects the excitation light emitted by the first light source 1110 and reflects the excitation light along a first optical path to the second region 1120b on the periphery of the first region of the light splitting and combining element 1120, and the second region 1120b transmits the excitation light to the light outlet channel. The first region 1120a (e.g., the central region) of the optical splitting and combining element 1120 receives the excitation light emitted from the first light source 1110 in the second period and guides the excitation light to the second section 1132 of the wavelength conversion device 1130, the inclined surface 1133d of the second section 1131 is provided with a fluorescent material, the second section 1132 converts the excitation light into the excited light and reflects the excited light to the guiding device 1140 along a second optical path different from the first optical path and not overlapping with the first optical path, the guiding device 1140 guides the excited light to the optical splitting and combining element 1120, and the optical splitting and combining element 1120 guides (e.g., reflects) the excited light to the light exit channel 1108.

It is understood that, compared to the first embodiment, the optical paths of the excitation light and the stimulated light of the light source system 1000 of the present modified embodiment are interchanged, that is, the excitation light is reflected to the beam splitting and combining element along the first optical path, the stimulated light is guided to the guiding device 1140 along the second optical path, and the guiding device redirects (e.g., reflects) the stimulated light to the beam splitting and combining element 1120 to guide the stimulated light to the light-emitting channel.

In summary, in the

light source systems

100 and 1000 of the first embodiment and the modified embodiments thereof, one of the excitation light and the excitation light reflected by the

second sections

132 and 1132 is guided to the light splitting and combining

element

120 and 1120 through the guiding

device

140 and 1140, the other of the excitation light and the excitation light reflected by the

second sections

132 and 1132 is guided to the light splitting and combining element 1120, and the light splitting and combining element 120 combines the excitation light and the excitation light reflected by the

second sections

132 and 1132 by using a wavelength combining method. When the

light source system

100, 1000 is actually used, the light paths of the excitation light and the stimulated light can be flexibly designed and changed by changing the wavelength conversion device 130, 1130, the light splitting and combining

element

120, 1120 and the guiding

device

140, 1140.

It is understood that, in the modified embodiments of the

light source system

200 and 900 of the second to ninth embodiments, the optical paths of the excitation light and the received laser light may also be interchanged, that is, the excitation light is reflected to the light splitting and combining element along the first optical path, the received laser light is guided to the guiding device along the second optical path, and the guiding device redirects (e.g., reflects) the received laser light to the light splitting and combining element to guide the received laser light to the light emitting channel, and the detailed structure of each modified embodiment is not repeated here.

Referring to fig. 26 and 27, in an embodiment of a dynamic balance compensation scheme in the structure of each wavelength conversion device, the wavelength conversion device 1030 is formed by digging a hollow 1032 in an opposite region of a hypotenuse region 1031 (i.e. the second reflection region of the second segment) that reflects the excitation light, the hollow 1032 and the hypotenuse region 1031 are respectively located at two sides of the central axis of the wavelength conversion device 1030 and are oppositely disposed, and the hollow 1032 is located in an inner ring region adjacent to the ring region where the wavelength conversion material is located. The area occupied by the empty groove 1032 is a part of the area of the ring in which the empty groove 1032 is located. The mass of the hollow 1032 is approximately equal to the mass of the beveled region 1031, so that when the wavelength conversion device 1030 rotates around the center of the circle, the mass is distributed uniformly, and the center of gravity is located on the straight line of the axis of the wavelength conversion device 1030, so that the whole wavelength conversion device 1030 can keep better dynamic balance in the motion process. This solution is suitable for the case where the diameter of the wavelength conversion device 1030 is slightly smaller, i.e., the smaller the diameter of the wavelength conversion device 1030, the better the dynamic balance of the wavelength conversion device 1030, and the larger the diameter, the more easily vibrations occur.

Referring to fig. 28, as another embodiment of a dynamic balance compensation scheme in the structure of each wavelength conversion device, the wavelength conversion device 1230 may have a non-uniform mass distribution of the entire wavelength conversion device 1230 due to a cut-off of a part of the volume of the beveled region 1231 for reflecting the excitation light, and in order to keep the wavelength conversion device 1230 in a good balance during the movement process, a hollow 1232 may be dug below the beveled region 1231, and then the hollow 1232 may be filled with a high density material, so that the mass of the left region and the right region of the entire wavelength conversion device 1230 are equivalent. When the wavelength conversion device 1230 rotates at a high speed around the center of the circle, the dynamic balance can be maintained.

Referring to fig. 29, in another embodiment of the dynamic balance compensation scheme in the structure of each wavelength conversion device, the wavelength conversion device 1330 has second hypotenuse regions 1332 with the same amplitude on the opposite sides of the hypotenuse region 1331 for reflecting the excitation light, and the

hypotenuse regions

1331 and 1332 for reflecting the excitation light are equal in area and parallel to each other. When the thickness of the wavelength conversion device 1330 exceeds 4mm, the oblique-side region 1331 and the second oblique-side region 1332 cannot be designed to be completely symmetrical in an actual operational design process, that is, the oblique-side region 1331 and the second oblique-side region 1332 are not completely parallel to each other. The weight compensated by the second hypotenuse region 1332 needs to be calculated from the missing weight of the hypotenuse region 1331. The above solution can compensate for the same mass on the same outer diameter, and can make the balance in the rotation process of the entire wavelength conversion device 1330 to reach the optimum state without increasing the vibration amount when the motor operates.

Referring to fig. 30, in another embodiment of the dynamic balance compensation scheme in the structure of the wavelength conversion devices, the wavelength conversion device 1430 is provided with a mass block 1432 below the bevel edge area 1431 for reflecting the excitation light, and the mass block 1432 can compensate the mass of a part of the volume cut out from the bevel edge area 1431, so that the mass in the semicircle where the bevel edge area 1431 is located is equivalent to the mass in the semicircle opposite to the bevel edge area 1431, that is, the mass center of the whole wavelength conversion device 1430 during the rotation process can be on the straight line where the axis of the rotation axis is located. The wavelength conversion device 1430 is thus able to protect against better dynamic balance during movement.

Referring to fig. 31, in order to provide an example of another dynamic balance compensation scheme in the structure of each wavelength conversion device, a circular ring-shaped barrier 1532 is disposed on the wavelength conversion device 1530, and the circular ring-shaped barrier has uneven mass distribution, wherein the mass distribution is set such that the portion near the oblique side region 1531 has heavier mass and the region opposite to the oblique side region 1531 has lighter mass, so that the mass distribution of the entire wavelength conversion device 1530 is uniform. The circular fence 1532 is well realized in the manufacturing process and is simple and convenient to operate. The wavelength conversion device 1530 can maintain a good dynamic balance during the high-speed rotation.

Referring to fig. 32, fig. 32 is a block diagram of a display device 60 according to a preferred embodiment of the invention. The display device 60 may be a projection device, such as an LCD, DLP, LCOS projection device, and the display device 60 may include a light source system 61, an optical-mechanical system 62, and a projection lens 63, the light source system employing the

light source system

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 of any of the above embodiments, or the light source system of the above-mentioned modified embodiment of the

light source system

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, or the light source system having one of the above-mentioned

wavelength conversion devices

1030, 1130, 1230, 1330, 1430, 1530. The optical-mechanical system 62 can perform image modulation on the light source light emitted by the light source system 61 according to the image data to generate projection light required for displaying an image, and the projection lens 63 is configured to perform projection according to the projection light to display a projection image. The display device 60 using the light source system of the

light source system

100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 and the modified embodiments thereof is small in size.

It should be noted that the

light source systems

100, 200, 300, 400, 500, 600, 700, 800, 900, and 1000 and the light source systems according to the modified embodiments of the present invention may be used in a stage light system, a vehicle lighting system, a surgical lighting system, and the like, and are not limited to the projection device described above.

Claims

1. A light source system, characterized by: the light source system comprises a first light source, a wavelength conversion device and a guide device;

the first light source is used for emitting exciting light;

the wavelength conversion device comprises a first section and a second section, wherein the first section and the second section are positioned on the light path of the exciting light in a time-sharing manner;

the first section is used for receiving the exciting light, generating stimulated light and reflecting the stimulated light along a first light path;

the second section is used for reflecting the exciting light along a second light path which is not coincident with the first light path;

the guiding device is used for guiding the excited light and/or the excited light reflected by the second section to a light outlet channel;

the first section and the second section are sequentially arranged along the circumferential direction, the first section comprises a first reflection region used for generating the stimulated light, the second section comprises a second reflection region used for reflecting the exciting light, and the second reflection region is obliquely arranged relative to the first reflection region; the wavelength conversion device comprises a substrate, wherein the substrate comprises a first surface, a second surface opposite to the first surface, a side surface connected between the first surface and the second surface, and an inclined surface, the first surface and the second surface are parallel to each other, the side surface is perpendicular to the first surface and the second surface, the substrate is divided into a first section and a second section which are sequentially arranged along the circumferential direction along the direction perpendicular to the first surface, the first surface comprises a first part corresponding to the first section and a second part corresponding to the second section, the inclined surface is obliquely arranged relative to the first surface, the first part serves as a first reflection region to generate the stimulated light, and the inclined surface serves as a second reflection region to reflect the stimulated light;

the first section comprises a first section area and a second section area, the first section area, the second section area and the second section area are arranged along the circumferential direction, the first section area is provided with a first fluorescent material and is used for emitting stimulated light of a first color, the second section area is provided with a second fluorescent material and is used for emitting stimulated light of a second color, and the stimulated light comprises the stimulated light of the first color and the stimulated light of the second color; the exciting light is blue, the first fluorescent material is a yellow fluorescent material, and the second fluorescent material is a green fluorescent material;

the light source system further comprises a relay lens, a band elimination filter element and a light homogenizing device, wherein the relay lens is used for collecting the stimulated light and the exciting light of the light emitting channel and guiding the stimulated light and the exciting light to the light homogenizing device, the light homogenizing device is used for emitting the collected stimulated light and the exciting light after homogenizing, the band elimination filter element is located between the relay lens and the light homogenizing device and located at the position, adjacent to the entrance at one side of the relay lens, of the light emitting channel, the yellow stimulated light is filtered by the band elimination filter element, the green part of the yellow stimulated light is obtained to be red stimulated light, and the green stimulated light of the light emitting channel is modified by the band elimination filter element for filtering part of green light to be green stimulated light generated by the second fluorescent material.

2. The light source system of claim 1, wherein: the light source system further includes a light splitting and combining element, where the light splitting and combining element is configured to guide the excitation light emitted by the first light source to the wavelength conversion device, where one of the excitation light and the excitation light reflected by the second segment is guided to the light splitting and combining element through the guiding device, the other of the excitation light and the excitation light reflected by the second segment is guided to the light splitting and combining element, and the light splitting and combining element combines the excitation light and the excitation light reflected by the second segment in a wavelength light combining manner.

3. The light source system of claim 2, wherein: the other light of the excited light and the excited light reflected by the second section is reflected by the wavelength conversion device to the light splitting and combining element, the guiding device comprises at least one reflecting element, and one light of the excited light and the excited light reflected by the second section is reflected by the at least one reflecting element to the light splitting and combining element.

4. The light source system of claim 3, wherein: the second section is used for reflecting the excitation light to the guiding device, the guiding device is also used for focusing the excitation light reflected by the second section and scattering the focused excitation light for decoherence, and the scattered excitation light is guided to the light splitting and combining element.

5. The light source system of claim 4, wherein: the surface of the second section for reflecting the exciting light is plated with a light diffusion film to be incoherent.

6. The light source system of claim 4, wherein: the guiding device comprises a light diffuser, the excited light generated by the first section is reflected to the light splitting and combining element, the exciting light reflected by the second section is guided to the light splitting and combining element by the at least one reflecting element and the light diffuser, and the light diffuser is used for scattering and decoherence of the exciting light reflected by the second section.

7. The light source system of claim 6, wherein: the guiding device comprises a first reflecting element and a second reflecting element, the light diffuser is located between the first reflecting element and the second reflecting element, the first reflecting element reflects the exciting light reflected by the wavelength conversion device to the light diffuser, the light diffuser transmits and scatters the exciting light reflected by the first reflecting element to be decohered and then provides the scattered and decohered exciting light to the second reflecting element, and the second reflecting element reflects the scattered and decohered exciting light of the light diffuser to the light splitting and combining element.

8. The light source system of claim 7, wherein: the guiding device further comprises a collecting lens, a collimating lens and a relay lens, wherein the collecting lens and the collimating lens are located between the wavelength conversion device and the first reflecting element, and the relay lens is located between the second reflecting element and the light splitting and combining element.

9. The light source system of claim 3, wherein: the at least one reflecting element comprises a reflecting film, and the guiding device further comprises a scattering layer arranged on the reflecting film, scattering particles arranged in the reflecting film, or the upper surface or the lower surface of the reflecting film is a scattering surface, so that the guiding device scatters the excited light and/or the excited light reflected by the second section.

10. The light source system of claim 1, wherein: the light source system further comprises a light splitting element and a light combining element, the light splitting element is used for guiding the excitation light emitted by the first light source to the wavelength conversion device, one of the excitation light and the excitation light reflected by the second section is guided to the light combining element through the guiding device and/or the light splitting element, the other of the excitation light and the excitation light reflected by the second section is also guided to the light combining element, and the light combining element combines the excitation light and the excitation light reflected by the second section in a wavelength light combining mode.

11. The light source system of claim 10, wherein: the excitation light reflected by the second segment is guided to the light combining element through the guiding device, the guiding device comprises at least one reflecting element, the excitation light reflected by the second segment is reflected to the light combining element by the at least one reflecting element, and the received laser light is guided to the light combining element by the light splitting element; the guiding device comprises a light diffuser, the excited light generated by the first section is reflected to the light splitting and combining element, the excitation light reflected by the second section is guided to the light combining element by the at least one reflecting element and the light diffuser, and the light diffuser is used for scattering and decoherence of the excitation light reflected by the second section.

12. The light source system of claim 11, wherein: the guiding device comprises a first reflecting element, the light diffuser is located between the first reflecting element and the light combining element, the first reflecting element reflects the exciting light reflected by the wavelength conversion device to the light diffuser, and the light diffuser transmits and scatters the exciting light reflected by the first reflecting element to be decohered and then provides the scattered light to the light combining element.

13. The light source system of claim 10, wherein: the side surface comprises a first side surface corresponding to the first section and a second side surface corresponding to the second section, the inclined surface is connected between the second part of the first surface and the second side surface, and the inclined surface forms an obtuse angle with the second part of the first surface and the second side surface.

14. The light source system of claim 10, wherein: the side face corresponds to the first section, the inclined face corresponds to the second section and is connected between the second part of the first surface and the second surface, and the inclined face and the second part of the first surface form an obtuse angle and form an acute angle.

15. The light source system of claim 10, wherein: the side face comprises a first side face corresponding to the first section and a second side face corresponding to the second section, the inclined face is connected between the second part of the first surface and the second side face, the second side face protrudes out of the first surface, the inclined face and the second part of the first surface form an obtuse angle, and the inclined face and the second side face form an acute angle.

16. The light source system of claim 1, wherein: the first surface of the base body is sunken towards the second surface to form a concave part, and the concave part comprises the inclined surface and an opposite surface opposite to the inclined surface; the inclined plane with the opposite face links to each other, just the inclined plane still connects the side of base member, the opposite face connect in the inclined plane with between the first surface.

17. The light source system of claim 2, wherein: the light source system further comprises a second light source, the second light source emits red laser light, the light splitting and combining element comprises a first section and a second section, the first section receives the red laser light and reflects the red laser light to the first section area, the first section area reflects the red laser light and the first color stimulated light generated by conversion of the first fluorescent material to the second section together, the first section further receives the blue excitation light and reflects the blue excitation light to the reflection area, and the second section transmits the red laser light and the first color stimulated light to the light emitting channel.

18. The light source system according to any one of claims 1 to 17, wherein: the light homogenizing device is a light homogenizing square rod, and the light homogenizing square rod is used for homogenizing the collected stimulated laser and the collected exciting light and then emitting the homogenized laser and the collected exciting light.

19. The light source system according to any one of claims 1 to 17, wherein: the light homogenizing device is a compound eye system, and the compound eye system is used for homogenizing the stimulated laser and the exciting light of the light outlet channel.

20. The light source system of claim 1, wherein: the light source system further comprises a dodging device and a collimating lens, the collimating lens is arranged on a light path where exciting light emitted by the first light source is located and used for collimating the exciting light emitted by the first light source, and the dodging device is arranged on the light path where the exciting light emitted by the collimating lens is located and used for dodging the exciting light after collimation.

21. The light source system of claim 1, wherein: the wavelength conversion device is provided with a bevel edge area for reflecting exciting light, and the bevel edge area is a second reflection area of the second section;

a hollow groove is dug below the bevel edge region of the wavelength conversion device, and high-density materials are filled in the hollow groove; or the wavelength conversion device is provided with second hypotenuse regions with the same amplitude on the opposite sides of the hypotenuse regions, and the hypotenuse regions and the second hypotenuse regions have the same area and are parallel to each other; or a mass block is arranged below the bevel edge area of the wavelength conversion device, and the mass block can compensate the mass of a part of the cut-off volume in the bevel edge area; or a circular ring-shaped fence is arranged below the wavelength conversion device, the mass distribution of the circular ring-shaped fence is uneven, and the mass distribution of the circular ring-shaped fence is set to be heavier than that of the area opposite to the bevel edge area, wherein the part is close to the bevel edge area.

22. A display device comprising a light source system, characterized in that: the light source system adopts the light source system as claimed in any one of claims 1 to 21.