Light source device and projection equipment

Abstract

The embodiment of the invention discloses a light source device and projection equipment, the light source device can effectively separate and recycle fluorescent light in different polarization states through the ingenious layout of a first light splitting element and a second light splitting element, and particularly, the fluorescent light in the second polarization state is circularly reflected back to a wavelength conversion assembly for multiple times to be excited again. The utilization rate of light energy is improved, the generation efficiency of the fluorescence in the first polarization state is enhanced, and therefore the brightness and stability of the whole light source are improved. And secondly, the wavelength conversion assembly and the first phase difference element in the device cooperate with each other, so that the polarization state of fluorescence can be accurately controlled. The first phase difference element can adjust the phase relation of the passing light, thereby helping to realize more accurate polarization state separation and conversion.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of light sources, in particular to a light source device and a projection device. BACKGROUND

[0002] The laser light source is a common light source type of the projector, which has the advantages of high brightness, wide color gamut, and bright image, etc. The disadvantage is that the laser reflection on the projection surface will produce speckle phenomenon, which affects the visual effect. The P-state and S-state fluorescence is excited by using short-wavelength laser light, and then the P-state fluorescence is combined with the three-color laser light to emit, or the S-state fluorescence is directly emitted, so as to supplement the brightness and reduce the laser speckle. However, in the above-mentioned manner, the P-state fluorescence and the S-state fluorescence are always contained in the fluorescence. Whether the P-state fluorescence is combined with the three-color laser light to emit, or the S-state fluorescence is directly emitted, at least there is residual fluorescence of another polarization state (P-state or S-state), which causes the problem of low fluorescence utilization rate. SUMMARY

[0003] Embodiments of the present application provide a light source device and a projection device, which solve the problem of low fluorescence utilization rate in the related art.

[0004] The technical solution of the present application is implemented as follows:

[0005] In a first aspect, the embodiments of the present application provide a light source device, which comprises a light source assembly, a first light splitting element, a first guide assembly, and a wavelength conversion assembly, wherein,

[0006] The light source assembly comprises a first light source assembly, the first light splitting element and the first guide assembly are arranged along the light path direction of the first color excitation light comprising the first polarization state generated by the first light source assembly, and the wavelength conversion assembly is located in the transmission direction of the first color excitation light;

[0007] The first guide assembly comprises a second light splitting element and a first phase difference element;

[0008] The first color excitation light at least passes through the first light splitting element, the second light splitting element and the first phase difference element to be guided and irradiated to the wavelength conversion assembly to excite and generate fluorescence comprising the first polarization state and the second polarization state. The fluorescence of the first polarization state is emitted through the first light splitting element, and the fluorescence of the second polarization state is reflected to the wavelength conversion assembly through the first light splitting element and the second light splitting element to generate fluorescence comprising the first polarization state and the second polarization state. In this way, all the fluorescence of the first polarization state is emitted through the first light splitting element, and the first polarization state is different from the second polarization state.

[0009] In the above scheme, the first guide assembly further comprises a first reflective element; wherein the first phase difference element is located between the second light splitting element and the first reflective element, the first phase difference element is arranged adjacent to the first reflective element, and the first phase difference element is spaced apart from the second light splitting element; the light exit side of the first light source assembly is located on the side of the first light splitting element away from the outer surface of the first guide assembly, the first color excitation light transmits through the first light splitting element to reach the first guide assembly, and then the second light splitting element, the first phase difference element and the first reflective element perform polarization state conversion and guide to the wavelength conversion assembly.

[0010] In the above scheme, the first light source assembly comprises one or more, the first light source assembly comprises a first color light source, the first color light source generates first color excitation light comprising the first polarization state; or, the first light source assembly comprises a first color laser light source and a second phase difference element, the first color excitation light generated by the first color laser light source passes through the second phase difference element to obtain first color excitation light comprising the first polarization state.

[0011] In the above scheme, the light source assembly further comprises one or more second light source assemblies, the light exit side of the second light source assembly is located on the side of the first light splitting element away from the outer surface of the first guide assembly, and the second color excitation light comprising the second polarization state generated by the second light source assembly is reflected out of the first light splitting element; the first light splitting element combines the fluorescence of the first polarization state with the second color excitation light of the second polarization state and emits; wherein the second color excitation light and the first color excitation light have the same wavelength, or the second color excitation light and the fluorescence corresponding color wavelength do not overlap or partially overlap.

[0012] In the above scheme, the light source assembly further comprises one or more second light source assemblies, the second light source assembly comprises a three-color laser light source and a movable guide assembly, the movable guide assembly comprises a third phase difference element, a second reflective element and a third light splitting element; each color excitation light emitted by the three-color laser light source is converted into each color excitation light comprising the second polarization state through the third phase difference element, part of the each color excitation light of the second polarization state is reflected through the third light splitting element, part is transmitted through the second reflective element, and part is reflected through the third light splitting element and transmitted through the second reflective element, and guided to the first light splitting element.

[0013] In the scheme, the light source assembly further comprises a third light source assembly, and an out-light side of the third light source assembly is located on a side of the wavelength conversion assembly away from the first light splitting element; the wavelength conversion assembly is dynamically active, and the wavelength conversion assembly is provided with a transmission area distributed in a circumferential direction; the third color excitation light generated by the third light source assembly and including the first polarization state passes through the transmission area to reach the first light splitting element; the transmission area includes one or more of a light transmission area, a hole, and a diffusion area; the third color excitation light has the same wavelength as the first color excitation light, or the third color excitation light and a color wavelength corresponding to the fluorescent light do not overlap or partially overlap.

[0014] In the scheme, the third light source assembly includes a second color light source, and the second color light source generates third color excitation light including the first polarization state; or the third light source assembly includes a second color laser light source and a fourth phase difference element, and third color excitation light generated by the second color laser light source passes through the fourth phase difference element to obtain third color excitation light including the first polarization state.

[0015] In the scheme, the first color excitation light generated by the first light source assembly is incident on a first light path of the first light splitting element and a second light path of the first light splitting element that is emitted to the first light splitting element through the wavelength conversion assembly.

[0016] In the scheme, the wavelength conversion assembly is provided with a wavelength conversion area distributed in a circumferential direction, and the fluorescent light of the second polarization state is reflected to the wavelength conversion assembly through the first light splitting element and the second light splitting element, and the fluorescent light including the first polarization state and the second polarization state is generated through the wavelength conversion area.

[0017] In the scheme, the light source device further includes one or more of a dissipation element, a compound eye, at least one first shaping element, a second shaping element, and a homogenizing element, wherein the dissipation element is arranged between the first light source assembly and the first light splitting element; the compound eye is arranged between the first light splitting element and the dissipation element; the at least one first shaping element is arranged between the first light splitting element and the wavelength conversion assembly; and the second shaping element and the homogenizing element are arranged in an emission direction of the fluorescent light having the first polarization state.

[0018] In a second aspect, the embodiments of the present application provide a light source device, which comprises a light source assembly, a first light splitting element, a first guide assembly, and a wavelength conversion assembly, wherein,

[0019] The light source assembly includes a fourth light source assembly, the first guiding assembly and the first beam splitting element are arranged along the optical path direction of the first color excitation light generated by the fourth light source assembly, and the wavelength conversion assembly is located in the transmission direction of the first color excitation light; the first guiding assembly includes a second beam splitting element;

[0020] Wherein, the first color excitation light passes through the second beam splitter and is irradiated by the first beam splitter to the wavelength conversion component to generate fluorescence including a first polarization state and a second polarization state. The fluorescence of the first polarization state is emitted through the first beam splitter, and the fluorescence of the second polarization state is reflected by the first beam splitter and the second beam splitter to the wavelength conversion component to generate fluorescence including the first polarization state and the second polarization state. The first polarization state is different from the second polarization state.

[0021] In the above scheme, the wavelength conversion component is provided with a wavelength conversion region distributed along the circumferential direction. The fluorescence of the second polarization state is reflected to the wavelength conversion component by the first beam splitter and the second beam splitter, and is reflected by the wavelength conversion region to generate fluorescence including the first polarization state and the second polarization state.

[0022] In the above scheme, the second beam splitter is an arc-shaped beam splitter, and the light-emitting side of the fourth light source assembly is located on the side of the arc-shaped beam splitter away from the outer surface of the first beam splitter. The first color excitation light is transmitted through the arc-shaped beam splitter to the first beam splitter, and then reflected by the first beam splitter to the wavelength conversion assembly.

[0023] In the above scheme, the light source assembly further includes one or more fifth light source assemblies; the light-emitting side of the fifth light source assembly is located on the side of the first beam splitter away from the outer surface of the second beam splitter, and the fourth color excitation light including the second polarization state generated by the fifth light source assembly is reflected and emitted by the first beam splitter; the first beam splitter combines the fluorescence of the first polarization state with the fourth color excitation light of the second polarization state for emission; the fourth color excitation light has the same wavelength as the first color excitation light, or the color wavelengths of the fourth color excitation light and the fluorescence do not overlap or partially overlap.

[0024] In the above scheme, the second beam splitter is a planar beam splitter, which includes a first part and a second part; wherein the arrangement of the first part and the second part includes one of the following: the first part is the middle part of the planar beam splitter, and the second part is the surrounding part; the first part is the upper half of the planar beam splitter, and the second part is the lower half of the planar beam splitter excluding the upper half; the first part is an aperture, or a dichroic element that transmits the first color excitation light and reflects fluorescence, or an element that transmits the first color excitation light; the second part is a mirror, or a dichroic element that transmits the first color excitation light and reflects fluorescence.

[0025] In the above scheme, the third optical path of the first color excitation light generated by the fourth light source component incident on the first beam splitter and the fourth optical path emitted from the first beam splitter via the wavelength conversion component do not overlap.

[0026] In the above scheme, the light source assembly further includes a sixth light source assembly, the light-emitting side of which is located on the side of the wavelength conversion assembly away from the first beam splitter; the wavelength conversion assembly is dynamically movable, and a transmission region distributed along the circumferential direction is provided on the wavelength conversion assembly; the fifth color excitation light generated by the sixth light source assembly, including the first polarization state or the second polarization state, reaches the first beam splitter through the transmission region; the transmission region includes one or more of a light-transmitting region, a aperture, and a diffusion region; the wavelength of the fifth color excitation light is the same as that of the first color excitation light, or the wavelength of the fifth color excitation light does not overlap or partially overlaps with the color wavelength corresponding to the fluorescence.

[0027] In the above scheme, the sixth light source component includes a third color light source, which generates a fifth color excitation light including the first polarization state or the second polarization state; or, the sixth light source component includes a third color laser light source, a fifth phase difference element, or a sixth phase difference element, wherein the fifth color excitation light generated by the third color laser light source is passed through the fifth phase difference element to obtain a fifth color excitation light including the first polarization state, or the fifth color excitation light generated by the third color laser light source is passed through the sixth phase difference element to obtain a fifth color excitation light including the second polarization state.

[0028] In the above scheme, the wavelength conversion component further includes a phase difference region, and the emitted light of the light source device includes a first timing sequence and a second timing sequence. Through the first timing sequence, the first color excitation light is emitted as fluorescence of the first polarization state through the wavelength conversion component and the first beam splitter. The fluorescence of the first polarization state includes fluorescence of the first polarization state excited by the wavelength conversion component and fluorescence of the first polarization state recovered by polarization. Through the second timing sequence, the first color excitation light is emitted as first color excitation light after polarization conversion through the phase difference region.

[0029] In the above scheme, the light source device further includes one or more of the following: a dissipation element, a compound eye, at least one first shaping element, a second shaping element, and a homogenizing element. The dissipation element is disposed between the first light source assembly and the second beam splitter; the compound eye is disposed between the second beam splitter and the dissipation element; the first shaping element is disposed between the first beam splitter and the wavelength conversion assembly; the second shaping element and the homogenizing element are disposed in the emission direction of the first beam splitter emitting fluorescence with the second polarization state or in the emission direction of the first beam splitter emitting fluorescence with the second polarization state.

[0030] In the above scheme, the light source device further includes an illumination system, and the fluorescence having the second polarization state is emitted into the illumination system through the first beam splitter.

[0031] Thirdly, embodiments of this application provide a projection device, which includes the light source device described in any one of the first or second aspects above.

[0032] The light source device provided in this application embodiment includes a light source component, a first beam splitter, a first guiding component, and a wavelength conversion component. The light source component includes a first light source component. The first beam splitter and the first guiding component are arranged along the optical path direction of the first color excitation light including a first polarization state generated by the first light source component. The wavelength conversion component is located in the transmission direction of the first color excitation light. The first guiding component includes a second beam splitter and a first phase difference element. The first color excitation light is guided by at least the first beam splitter, the second beam splitter, and the first phase difference element to irradiate the wavelength conversion component to excite fluorescence including a first polarization state and a second polarization state. The fluorescence of the first polarization state is emitted through the first beam splitter, and the fluorescence of the second polarization state is reflected by the first beam splitter and the second beam splitter to the wavelength conversion component to generate fluorescence including both the first and second polarization states. This cycle continues, with the first beam splitter emitting all fluorescence of the first polarization state, where the first polarization state and the second polarization state are different. Thus, firstly, through the ingenious arrangement of the first and second beam-splitting elements, this light source device can effectively separate and recycle fluorescence in different polarization states. In particular, the fluorescence in the second polarization state (i.e., residual fluorescence) is repeatedly reflected back to the wavelength conversion component for re-excitation, which not only improves the utilization rate of light energy but also enhances the generation efficiency of the fluorescence in the first polarization state, thereby improving the overall brightness and stability of the light source. Secondly, the wavelength conversion component and the first phase difference element in this device work together to precisely control the polarization state of the fluorescence. The first phase difference element can adjust the phase relationship of the transmitted light, helping to achieve more accurate polarization state separation and conversion. Finally, the compact structural design integrates the light source component, beam-splitting element, guiding component, and wavelength conversion component into one unit, which helps to reduce the size of the equipment, simplify the optical system design, reduce assembly costs, and may also improve the reliability and durability of the system, thereby improving the system integration. Attached Figure Description

[0033] Figure 1 A schematic diagram of an optional light source device provided in this application embodiment. Figure 1 ;

[0034] Figure 2 A schematic diagram of an optional light source device provided in this application embodiment. Figure 2 ;

[0035] Figure 3 A schematic diagram of an optional light source device provided in this application embodiment. Figure 3 ;

[0036] Figure 4 A schematic diagram of an optional light source device provided in this application embodiment. Figure 4 ;

[0037] Figure 5A schematic diagram of an optional light source device provided in this application embodiment. Figure 5 ;

[0038] Figure 6 A schematic diagram of an optional light source device provided in this application embodiment. Figure 6 ;

[0039] Figure 7 A schematic diagram of an optional light source device provided in this application embodiment. Figure 7 ;

[0040] Figure 8 A schematic diagram of an optional light source device provided in this application embodiment. Figure 8 ;

[0041] Figure 9 A schematic diagram of an optional light source device provided in this application embodiment. Figure 9 ;

[0042] Figure 10 A schematic diagram of an optional light source device provided in this application embodiment. Figure 10 ;

[0043] Figure 11 A schematic diagram of an optional light source device provided in this application embodiment. Figure 10 one;

[0044] Figure 12 A schematic diagram of an optional light source device provided in this application embodiment. Figure 10 two;

[0045] Figure 13 A schematic diagram of an optional light source device provided in this application embodiment. Figure 10 three;

[0046] Figure 14 A schematic diagram of an optional light source device provided in this application embodiment. Figure 10 Four;

[0047] Figure 15 A schematic diagram of an optional light source device provided in this application embodiment. Figure 10 five;

[0048] Figure 16 A schematic diagram of an optional light source device provided in this application embodiment. Figure 10 six;

[0049] Figure 17 A schematic diagram of an optional light source device provided in this application embodiment. Figure 10 seven;

[0050] Figure 18 This is a schematic diagram of an optional projection device provided in an embodiment of this application. Detailed Implementation

[0051] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0052] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] This application provides a light source device, see [link]. Figure 1 , Figure 1 The diagram shown is a schematic representation of a light source device 100, which includes a light source assembly 1 (not shown), a first beam-splitting element 2, a first guiding assembly 3, and a wavelength conversion assembly 4.

[0055] The light source assembly 1 includes a first light source assembly 11, a first beam splitting element 2 and a first guiding assembly 3 arranged along the optical path direction of the first color excitation light including the first polarization state generated by the first light source assembly 11, and a wavelength conversion assembly 4 located in the transmission direction of the first color excitation light.

[0056] The first guiding component 3 includes a second beam splitter 31 and a first phase difference element 32;

[0057] The first color excitation light is guided by at least the first beam splitter 2, the second beam splitter 31 and the first phase difference element 32 to the wavelength conversion component 4 to generate fluorescence including a first polarization state and a second polarization state. The fluorescence of the first polarization state is emitted through the first beam splitter 2, and the fluorescence of the second polarization state is reflected through the first beam splitter 2 and the second beam splitter 31 to the wavelength conversion component 4 to generate fluorescence including the first polarization state and the second polarization state. This process is repeated so that the first beam splitter emits all the fluorescence of the first polarization state, and the first polarization state is different from the second polarization state.

[0058] In some embodiments, the light source assembly is used to generate excitation light and supplementary light, and the light source assembly may include a tri-color laser light source, a monochromatic laser light source, a light-emitting diode (LED) light source, a monochromatic LED light source, and an ultraviolet (UV) light source, etc.

[0059] It should be noted that the excitation light and the supplementary light, as well as the supplementary light, have different wavelengths. The excitation light can be light with a relatively short wavelength, such as blue laser light, blue LED light, and UV light. For example, the excitation light can be blue laser light (also known as blue excitation light or blue light), with a dominant wavelength of 440–470 nanometers (nm). The supplementary light can be red, green, blue, etc. For example, the supplementary light can include red laser light (also known as red excitation light or red light) and / or green laser light (also known as green excitation light or green light). Of course, the supplementary light can also be blue laser light.

[0060] In some embodiments, the excitation light, the supplementary light, and the fluorescence excited by the excitation light can have polarization characteristics. The excitation light, the supplementary light, and the fluorescence can have parallel (P) polarization and perpendicular (S) polarization. Here, parallel polarization is also called linear polarization. In other words, the excitation light, the supplementary light, and the fluorescence can have P polarization state and S polarization state.

[0061] In some embodiments, the light source assembly may include a first light source assembly for generating a first color excitation light comprising a first polarization state. Here, the first polarization state may be a p-polarization state. The first color excitation light may be blue excitation light.

[0062] In some embodiments, the first beam splitter is used to manipulate and separate light of different polarization states in a beam, and can also combine visible light. Exemplarily, the first beam splitter can be used to transmit excitation light of a first polarization state and reflect excitation light of a second polarization state, and / or, the first beam splitter can be used to transmit fluorescence of a first polarization state and reflect fluorescence of a second polarization state. Of course, the first beam splitter can also combine the transmitted or reflected light, where the first and second polarization states are different, and the second polarization state can be an S-polarization state. The first beam splitter can be a polarization beam splitter, such as a polarizing beam splitter (PBS).

[0063] In some embodiments, the first guiding component includes a second beam splitter and a first phase difference element.

[0064] The aforementioned second beam-splitting element is used to transmit the first-color excitation light and reflect other light. The second beam-splitting element can also be used to separate or adjust the energy distribution of incident light (such as the first-color excitation light with a first polarization state) in a specific manner. The second beam-splitting element can be an arc-shaped element with its opening facing the first beam-splitting element. Specifically, the second beam-splitting element can be an arc-shaped beam splitter.

[0065] The aforementioned first phase difference element is a phase difference element, which is used to change the polarization state of light. Polarization can be understood as the direction of light vibration, and can be divided into three types: linear polarization, circular polarization, and elliptical polarization. Phase difference elements can be waveplates, which are divided into two types: half-wave plates (1 / 2 waveplate or λ / 2) and quarter-wave plates (1 / 4 waveplate or λ / 4), used to generate phase delays of π and π / 2, respectively.

[0066] In some embodiments, the wavelength conversion component is located in the transmission direction of the first color excitation light. The wavelength conversion component includes at least a wavelength conversion region, which has a wavelength conversion material that can convert the first color excitation light (having a first polarization state or a second polarization state) into fluorescence including the first polarization state and the second polarization state. The wavelength conversion material can be a phosphor or a phosphor, etc.; for example, it can be a yellow phosphor that emits yellow light when excited, such as a yttrium aluminum garnet (YAG) phosphor containing cerium (Ce) as an activator; it can also be a green phosphor, red phosphor, cyan phosphor, orange phosphor, etc. The specific fluorescent material can be selected according to actual needs, and this application does not impose specific limitations on it.

[0067] Of course, the wavelength conversion component may include one or more wavelength conversion regions, each wavelength conversion region may correspond to a wavelength conversion material, and may produce at least one fluorescence band that is different from the excitation light band. That is, the generated fluorescence includes at least one color light with a wavelength band that is different from the excitation light band. For example, the fluorescence may be at least one of red fluorescence, green fluorescence, yellow fluorescence, cyan fluorescence, and orange fluorescence.

[0068] In one feasible scenario, the following example illustrates the use of a first light source component that can generate blue excitation light including the P-polarized state, a first beam splitter that is a polarization beam splitter, a second beam splitter that is an arc-shaped beam splitter, and a first phase difference element that is a quarter-wave plate.

[0069] The blue excitation light, including the P-polarized state, generated by the first light source assembly is transmitted through a polarization beam splitter, then through an arc-shaped beam splitter in the first guiding assembly, and delayed by a quarter-wave plate. After reflection by other components in the first guiding assembly, it is then delayed again by a quarter-wave plate. It should be noted that due to the two passes through the quarter-wave plate element 11, the polarization state of the blue excitation light changes from P to S. The S-state blue excitation light then passes through the polarization beam splitter again. Since the current polarization state of the blue excitation light is S, the polarization beam splitter reflects the S-state blue excitation light, thereby reaching the wavelength conversion assembly to excite fluorescence in both P-polarized and S-polarized states. It should be noted that the proportions of P-polarized fluorescence and S-polarized fluorescence are each 50%.

[0070] Furthermore, the P-polarized fluorescence (i.e., 50% of the P-state fluorescence) is transmitted and emitted through the polarization beam splitter, while the S-polarized fluorescence (i.e., 50% of the S-state fluorescence) is reflected by the polarization beam splitter and then reflected again by the curved beam splitter. It should be noted that because the fluorescence spot is slightly large after diffuse reflection from surface particles in the wavelength conversion region, the curved beam splitter is designed to be slightly focused, preventing the reflected fluorescence spot from exceeding the element size. At this point, the S-polarized fluorescence, after reflection by the curved beam splitter, strikes the polarization beam splitter again. The polarization beam splitter reflects the S-polarized fluorescence to the wavelength conversion component. Here, the 50% S-state fluorescence, after passing through the wavelength conversion component, will again have 50% P-state fluorescence and 50% S-state fluorescence. Furthermore, the P-state fluorescence is transmitted and emitted through the polarization beam splitter, and the S-state fluorescence again follows the same path, repeating the cycle. This reduces the residue of S-state fluorescence and improves fluorescence utilization. Meanwhile, most of the residual blue light in the fluorescence remains in the S state and is reflected by the polarization beam splitter. After passing through the quarter-wave plate twice, it becomes the P state and is transmitted through the polarization beam splitter again. Since the direction of the residual blue light transmitted through the polarization beam splitter is different from the direction of the fluorescence reflected by the polarization beam splitter, the residual blue light will not hit the screen, which can greatly improve the problem of residual blue light in the fluorescence.

[0071] The light source device provided in this application includes a light source component, a first beam splitter, a first guiding component, and a wavelength conversion component. The light source component includes a first light source component. The first beam splitter and the first guiding component are arranged along the optical path direction of the first color excitation light including a first polarization state generated by the first light source component. The wavelength conversion component is located in the transmission direction of the first color excitation light. The first guiding component includes a second beam splitter and a first phase difference element. The first polarization state and the second polarization state are different. The first color excitation light is irradiated to the wavelength conversion component through at least the first beam splitter, the second beam splitter, and the first phase difference element to excite fluorescence including a first polarization state and a second polarization state. The fluorescence of the first polarization state is emitted through the first beam splitter. The fluorescence of the second polarization state is reflected by the first beam splitter and the second beam splitter to the wavelength conversion component to generate fluorescence including both the first polarization state and the second polarization state. This cycle continues, with the first beam splitter emitting all the fluorescence of the first polarization state. Thus, firstly, through the ingenious arrangement of the first and second beam-splitting elements, this light source device can effectively separate and recycle fluorescence in different polarization states. In particular, the fluorescence in the second polarization state (i.e., residual fluorescence) is repeatedly reflected back to the wavelength conversion component for re-excitation, which not only improves the utilization rate of light energy but also enhances the generation efficiency of the fluorescence in the first polarization state, thereby improving the overall brightness and stability of the light source. Secondly, the wavelength conversion component and the first phase difference element in this device work together to precisely control the polarization state of the fluorescence. The first phase difference element can adjust the phase relationship of the transmitted light, helping to achieve more accurate polarization state separation and conversion. Thirdly, the compact structural design integrates the light source component, beam-splitting element, guiding component, and wavelength conversion component into one unit, which helps to reduce the size of the equipment, simplify the optical system design, reduce assembly costs, and may also improve the reliability and durability of the system, thereby increasing the system integration level. Finally, most of the residual blue light in the fluorescence remains in the S state and is emitted to the first beam splitter for reflection. After passing through the first phase difference element twice, it becomes the P state and is transmitted through the first beam splitter again. Since the direction of the residual blue light transmitted through the first beam splitter is different from the direction of the fluorescence reflected by the first beam splitter, the residual blue light will not hit the screen, which can greatly improve the problem of residual blue light in the fluorescence.

[0072] In other embodiments of this application, reference is made to Figure 2 As shown, the first guiding component 3 also includes a first reflecting element 33; wherein, the first phase difference element 32 is located between the second beam splitting element 31 and the first reflecting element 33, the first phase difference element 32 and the first reflecting element 33 are arranged adjacent to each other, and the first phase difference element 32 and the second beam splitting element 31 are arranged at intervals.

[0073] The light-emitting side of the first light source assembly 11 is located on the side of the first beam splitter 2 away from the outer surface of the first guide assembly. The first color excitation light is transmitted through the first beam splitter 2 to the first guide assembly 3, and then the second beam splitter 31, the first phase difference element 32 and the first reflection element 31 perform polarization state conversion and guide it to the wavelength conversion assembly.

[0074] In some embodiments, the first reflective element is used to change the direction of light transmission, causing it to converge or diverge. The first reflective element can also cause the light to return along its original path. The first reflective element can be a curved reflector.

[0075] In some embodiments, the light-emitting side of the first light source assembly is located on the side of the first beam splitter away from the outer surface of the first guiding assembly. The first light source assembly generates a first color excitation light including a first polarization state, which is incident on the first beam splitter and transmitted to the second beam splitter. Then, it is transmitted through the second beam splitter, which has a coating characteristic of transmitting blue light and reflecting other light, and passes through the first phase difference element, then through the first reflection element for reflection, and then through the first phase difference element again. Because the first color excitation light in the first polarization state passes through the first phase difference element twice, the first color excitation light is converted from the first polarization state to the second polarization state. Then, the first color excitation light in the second polarization state is transmitted through the second beam splitter, reflected by the first beam splitter, and thus illuminates the wavelength conversion assembly.

[0076] As described above, firstly, by introducing a first reflective element, the light transmitted through the second beam-splitting element is reflected and redirected, which not only improves the light energy recovery and utilization rate but also makes optical path management more efficient. Combined with a first phase difference element, the polarization state of the light entering the wavelength conversion component can be further adjusted and optimized, ensuring effective conversion and utilization of light energy, thereby enhancing optical path control and efficiency. Secondly, the first phase difference element is located between the second beam-splitting element and the first reflective element, and is arranged adjacent to or spaced apart from both. This layout allows for more precise phase adjustment of the transmitted light. By accurately controlling the phase difference, the polarization state of the light can be converted more effectively. Then, by optimizing the component layout within the first guiding component, the light source component, beam-splitting element, phase difference element, and reflective element form a tightly connected optical path, reducing the complexity of the external optical path, improving the integration and compactness of the entire system, and enhancing the system's stability and reliability.

[0077] In other embodiments of this application, reference is made to Figure 2 and 3As shown, the first light source assembly 11 includes one or more, the first light source assembly 11 includes a first color light source, the first color light source generates a first color excitation light including a first polarization state; or, the first light source assembly 11 includes a first color laser light source 111 and a second phase difference element 112, the first color excitation light generated by the first color laser light source 111 is passed through the second phase difference element 112 to obtain a first color excitation light including a first polarization state.

[0078] In some embodiments, the first light source assembly may include one or more first color light sources, each of which is a light source capable of generating polarized light with a preset polarization state. Thus, by generating first color excitation light with a specific first polarization state, unnecessary light loss can be reduced, ensuring that more light energy is effectively utilized in the display process, thereby reducing energy consumption and improving the overall system energy efficiency. Furthermore, the use of polarized light sources facilitates more precise optical path control in the optical system. Further, the device includes multiple first color light sources, allowing independent adjustment of the brightness and polarization state of each light source, thereby achieving dynamic color management and adjustment to adapt to different display needs or environmental conditions.

[0079] Here, the second phase difference element can be a movable element or an element set in a fixed position. Of course, the second phase difference element can also be an element set at an angle. This application does not impose any specific restrictions on this.

[0080] In some embodiments, the first light source assembly includes a first color laser source and a second phase difference element. The first color excitation light generated by the first color laser source is passed through the second phase difference element to obtain first color excitation light with a first polarization state. Thus, firstly, the laser source itself has high directionality and monochromaticity; combined with the first color laser source, high-quality first color excitation light can be generated. Then, by introducing the second phase difference element, the first light source assembly enables the device to precisely control the polarization state of the first color excitation light. Through carefully designed phase difference adjustment, signal strength and resolution are improved. Finally, by controlling the polarization state of the excitation light, interference from ambient light and the influence of stray light can be effectively reduced, significantly improving the display's contrast and color vividness.

[0081] In other embodiments of this application, reference is made to Figure 4 As shown, the light source assembly 1 also includes one or more second light source assemblies 12, which may be the same as or different from the first light source assembly 11;

[0082] The light-emitting side of the second light source assembly 12 is located on the side of the first beam splitter 2 away from the outer surface of the first guide assembly 3. The second color excitation light, including the second polarization state, generated by the second light source assembly 12 is reflected and emitted by the first beam splitter.

[0083] The first beam splitter 2 combines the fluorescence in the first polarization state with the excitation light of the second color in the second polarization state for emission.

[0084] Wherein, the second color excitation light has the same wavelength as the first color excitation light, or the second color excitation light does not overlap or partially overlaps with the color wavelength corresponding to the fluorescence.

[0085] In some embodiments, the light source assembly may further include a second light source assembly for generating a second color excitation light having a second polarization state. Here, the second polarization state may be an S-polarization state. The second color excitation light may include, but is not limited to, one or more of blue excitation light, green excitation light, and red excitation light.

[0086] In some embodiments, the second light source component being the same as the first light source component can be understood as the second light source component and the first light source component being the same light source component, which can simultaneously generate a first color excitation light (such as blue excitation light) including a first polarization state (P) and a second polarization state (S), as well as other color excitation lights (such as green excitation light and red excitation light) including the second polarization state (S).

[0087] In some embodiments, the second light source component is different from the first light source component as follows: the first light source component is used to generate a first color excitation light (such as blue excitation light) in a first polarization state (P), and the second light source component is used to generate a second color excitation light (such as blue excitation light, green excitation light, and red excitation light) in a second polarization state (S).

[0088] In some embodiments, the fact that the second color excitation light has the same wavelength as the first color excitation light can be understood as the second color excitation light and the first color excitation light being excitation light of the same color (such as blue), and therefore, excitation light of the same color has the same wavelength.

[0089] In some embodiments, the fact that the wavelengths of the second color excitation light and the corresponding colors of the fluorescence do not overlap or partially overlap can be understood as the wavelength of the second color excitation light not overlapping or partially overlapping with the wavelength of the fluorescence excited by the first color excitation light. For example, the wavelength of the red laser does not overlap with the wavelength of the green fluorescence excited by the blue laser, and the wavelengths of the blue laser and the green laser partially overlap with the wavelengths of the green fluorescence excited by the blue laser, respectively.

[0090] In some embodiments, the light-emitting side of the second light source component is located on the side of the first beam splitter away from the outer surface of the first guide component. The second light source component generates a second color excitation light including a second polarization state, which is incident on the first beam splitter and reflected. Further, the first beam splitter emits the second color excitation light of the second polarization state together with the fluorescence of the first polarization state generated by the wave-light conversion component.

[0091] In one feasible scenario, the first color excitation light is a blue laser, and the second light source component emits blue laser, red laser, and green laser. The excited light includes yellow fluorescence, the first polarization state is P-state, and the second polarization state is S-state. The film coated on the first beam splitter can transmit blue light in the wavelength range of 430-490nm, P-state green light in the wavelength range of 510-540nm, red light in the wavelength range of 625-680nm, and P-state red light in the wavelength range of 625-680nm, while light in other wavelength ranges and polarization states is reflected. Assuming that the wavelength conversion region of the wavelength conversion component includes yellow phosphor, and the excited light is yellow fluorescence with a wavelength range of 500-680nm, then the P-state light in the yellow fluorescence with a wavelength range of 510-540nm, the light in the yellow fluorescence with a wavelength range of 625-680nm, and the P-state red light in the yellow fluorescence with a wavelength range of 625-680nm are transmitted through the light splitter and combiner (i.e., the first light splitter), the S-state light in the wavelength range of 510-540nm and / or the S-state red light in the wavelength range of 625-680nm are reflected by the light splitter and combiner, and the light in other wavelength ranges is also reflected. In essence, all S-state fluorescence and 35% of P-state fluorescence in the excited light (fluorescence) are reflected into the homogenizing element as the output light of the light source system. Approximately 15% of the P-state fluorescence is transmitted through the beam splitter and combiner. Therefore, the light reuse component allows this 15% P-state fluorescence to re-enter the wavelength conversion device. Due to diffuse reflection, after reflection, approximately 7.5% of the P-state fluorescence becomes S-state and 7.5% becomes P-state. The 7.5% S-state is reflected back into the homogenizing element by the beam splitter and combiner, while the 7.5% P-state follows the same optical path as the original P-state fluorescence and re-enters the wavelength conversion device, repeating this cycle. It should be noted that because the cycle converts all P-state fluorescence to S-state, if the subsequent spatial light modulator is set to a device such as an LCOS or LCD that requires polarization of the incident light, then polarization conversion elements such as PBS or PCS on the incident side are not necessary, reducing the number of devices while maintaining high brightness.

[0092] As described above, firstly, combining narrow-band excitation light (such as red or green laser) with broad-band fluorescence (such as yellow or green fluorescence) as supplementary light reduces losses from polarized light combination, effectively improving overall output brightness. This allows the light source device to balance color gamut and brightness, while also reducing speckle and color fringing issues, thus improving the quality of the projected image. Secondly, by adding multiple second light source components, the configuration of the light source can be flexibly adjusted as needed. Whether for improving brightness, expanding color gamut, or adapting to different application scenarios, this greatly enhances the system's flexibility and future upgrade potential.

[0093] In other embodiments of this application, reference is made to Figure 5 As shown, the light source assembly 1 also includes one or more second light source assemblies 12.

[0094] The second light source assembly 12 includes a three-color laser light source 121 and a movable guide assembly 122. The movable guide assembly 122 includes a third phase difference element 1221, a second reflection element 1222 and a third beam splitting element 1223.

[0095] The excitation light of each color emitted by the three-color laser light source 121 is converted into excitation light of each color including the second polarization state by the third phase difference element 1221. Part of the excitation light of each color in the second polarization state is reflected by the third beam splitter 1223, part is transmitted through the second reflection element 1222, and part is reflected by the third beam splitter 1223 and transmitted through the second reflection element 1222, and then guided to the first beam splitter.

[0096] In some embodiments, the light source assembly may further include a second light source assembly, which includes a tri-color laser light source and a movable guiding assembly, wherein the tri-color laser light source is used to simultaneously generate excitation light of multiple colors (such as red, green and blue).

[0097] In some embodiments, the light-emitting side of the three-color laser light source is located on the side of the third phase difference element away from the outer surface of the movable guide assembly. It should be noted that the three-color laser light source can provide extremely high color purity and brightness, significantly enhancing the color saturation and dynamic range of the display system, thereby enhancing color performance.

[0098] In some embodiments, the movable guiding component includes a third phase difference element, a second reflective element, and a third beam splitter element. It should be noted that the third phase difference element, the second reflective element, and the third beam splitter element are all adjustable or movable elements, and the number, position, and size of these elements can be adjusted according to the placement of the three-color lasers and the required proportion of P-state and S-state components in the blue light. This application does not impose specific limitations on these aspects.

[0099] The aforementioned third phase difference element is used to change the polarization state of each color of excitation light, thereby ensuring that the polarization states of each color of excitation light incident on the first beam-splitting element meet the design requirements. Alternatively, the proportion of different polarization states of the blue excitation light can be adjusted by changing the angle at which the excitation light is incident on the third phase difference element, thus controlling the proportion of blue excitation light during fluorescence excitation and consequently adjusting the color gamut and brightness of the light source device. The third phase difference element can be a half-wave plate or a quarter-wave plate.

[0100] The aforementioned third beam-splitting element is used to transmit second-color excitation light (such as red and / or green light) and reflect first-color excitation light (such as blue light). The third beam-splitting element can also be used to separate or adjust the energy distribution of incident light (such as first-color excitation light with a first polarization state) in a specific manner. The third beam-splitting element can be a planar beam splitter.

[0101] The aforementioned second reflective element is used to change the direction of light transmission, that is, to change the direction of light propagation by reflection. Of course, the second reflective element is also used to transmit first color excitation light (such as blue light) and reflect second color excitation light (such as red light and / or green light). The second reflective element can be a plane mirror.

[0102] In some embodiments, a three-color laser source generates excitation light of various colors, which, after passing through different arrangements of the laser and a third phase difference element, yields a first-color excitation light (e.g., blue light) with a first polarization state and a second polarization state, and a second-color excitation light (e.g., red light and / or green light) with a second polarization state. The first-color excitation light with the first polarization state and the second-color excitation light with the second polarization state are guided by a third beam splitter and / or a second reflector element to reach the first beam splitter.

[0103] As described above, firstly, the introduction of the movable guiding components, particularly the combination of the third phase difference element, the second reflective element, and the third beam splitter, provides unprecedented flexibility for optical path design. By adjusting the position or angle of these components, the path, phase, and polarization state of each color excitation light can be dynamically adjusted, thereby optimizing the distribution and utilization of light energy in different operating modes and achieving dynamic optical path adjustment. Simultaneously, the movable guiding components control the P and S ratio in the blue laser, enabling high and low color gamut and brightness switching. Furthermore, the third phase difference element can precisely control the polarization state of the color excitation light generated by the laser source, and in conjunction with the dual reflection and transmission mechanism of the second reflective element and the third beam splitter, achieves efficient recovery and reuse of light energy.

[0104] In other embodiments of this application, a wavelength conversion component is provided with a wavelength conversion region distributed along the circumferential direction. The fluorescence of the second polarization state is reflected to the wavelength conversion component by the first beam splitter and the second beam splitter, and the fluorescence including the first polarization state and the second polarization state is generated by reflection by the wavelength conversion region.

[0105] In some embodiments, the wavelength conversion component includes at least a rotatable drive component, which enables dynamic activity or dynamic rotation by rotating the wavelength conversion component. The rotatable drive component may be a rotary motor.

[0106] In some embodiments, the wavelength conversion component includes a wavelength conversion region distributed along a circumferential direction, wherein the wavelength conversion region is used to convert excitation light of a first wavelength distribution into fluorescence of a second wavelength distribution, also known as stimulated light, and to shift the wavelength so as to obtain light of different wavelengths.

[0107] In some embodiments, the first color excitation light is irradiated into the wavelength conversion region of the wavelength conversion assembly through at least the first beam splitter, the second beam splitter, and the first phase difference element, thereby exciting the generation of fluorescence including a first polarization state and a second polarization state. The fluorescence of the first polarization state is emitted through the first beam splitter, and the fluorescence of the second polarization state is reflected by the first beam splitter and the second beam splitter to the wavelength conversion assembly, where fluorescence including the first polarization state and the second polarization state is generated through the wavelength conversion region. This process is repeated so that the first beam splitter emits all the fluorescence of the first polarization state.

[0108] In other embodiments of this application, reference is made to Figure 6 As shown, the light source assembly 1 also includes a third light source assembly 13, the light-emitting side of which is located on the side of the wavelength conversion assembly 4 away from the first beam splitter 2.

[0109] The wavelength conversion component 4 is dynamically active. The wavelength conversion component 4 is provided with a wavelength conversion area and a transmission area distributed along the circumference. The third color excitation light generated by the third light source component 13, including the first polarization state, reaches the first beam splitter 2 through the transmission area. The transmission area includes one or more of the light transmission area, aperture, and diffusion area. The wavelength of the third color excitation light is the same as that of the first color excitation light, or the wavelength of the third color excitation light does not overlap or partially overlaps with the color wavelength corresponding to the fluorescence.

[0110] In some embodiments, the third light source component may include one or more, which are used to generate a third color excitation light including a first polarization state. Here, the first polarization state may be a P-polarization state. The third color excitation light may be a red excitation light or a green excitation light used as supplementary light to supplement the green or red laser on the screen and reduce the heat dissipation pressure of the three-color laser.

[0111] In some embodiments, the wavelength conversion component includes at least a rotatable drive component, which enables dynamic activity or dynamic rotation by rotating the wavelength conversion component. The rotatable drive component may be a rotary motor.

[0112] In some embodiments, the wavelength conversion component includes a transmissive region distributed along a circumferential direction, wherein the transmissive region is used to transmit a third color excitation light generated by a third light source component to produce a first polarization state, in order to supplement the green or red laser on the screen and reduce the heat dissipation pressure of the three-color laser. The transmissive region may be one or more of a light-transmitting region, an aperture, and a diffusion region.

[0113] In some embodiments, the fact that the third color excitation light has the same wavelength as the first color excitation light can be understood as the third color excitation light and the first color excitation light being excitation light of the same color (such as blue), and therefore, excitation light of the same color has the same wavelength.

[0114] In some embodiments, the fact that the wavelengths of the third color excitation light and the corresponding colors of the fluorescence do not overlap or partially overlap can be understood as the wavelength of the third color excitation light not overlapping or partially overlapping with the wavelength of the fluorescence excited by the first color excitation light. For example, the wavelength of the red laser does not overlap with the wavelength of the green fluorescence excited by the blue laser, and the wavelengths of the blue laser and the green laser partially overlap with the wavelengths of the green fluorescence excited by the blue laser, respectively.

[0115] In some embodiments, the second color excitation light in the first polarization state generated by the third light source component reaches the first beam splitter through the transmission region in the wavelength conversion component, and is transmitted out through the first beam splitter, thereby supplementing the second color excitation light on the screen, reducing the loss of polarized combined light, and reducing the heat dissipation pressure of the three-color laser.

[0116] In other embodiments of this application, the third light source assembly includes a second color light source, which generates third color excitation light including a first polarization state; or,

[0117] The third light source assembly includes a second color laser source and a fourth phase difference element. The third color excitation light generated by the second color laser source is passed through the fourth phase difference element to obtain third color excitation light including a first polarization state.

[0118] In some embodiments, the third light source component may include one or more second color light sources, each second color light source being a light source capable of generating polarized light with a preset polarization state and / or a preset color. For example, the second color light source may generate third color excitation light including a first polarization state.

[0119] In some embodiments, the fourth phase difference element may be a movable element or an element set in a fixed position. Of course, the fourth phase difference element may also be an element set at an angle. This application does not impose any specific limitations on this.

[0120] In some embodiments, the third light source assembly may include a second-color laser light source and a fourth phase difference element. The third-color excitation light generated by the second-color laser light source is passed through the fourth phase difference element to obtain third-color excitation light including a first polarization state. Thus, firstly, the laser light source itself has high directionality and monochromaticity; combined with the third-color laser light source, high-quality third-color excitation light can be generated. Then, by introducing the fourth phase difference element, the third light source assembly enables the device to precisely control the polarization state of the third-color excitation light. Through carefully designed phase difference adjustment, signal strength and resolution are improved. Finally, by controlling the polarization state of the excitation light, interference from ambient light and stray light can be effectively reduced, significantly improving the contrast and color vividness of the display. If the third-color excitation light is blue, the wavelength conversion region includes inner and outer rings. The third-color excitation light corresponds to the inner ring, and the first-color excitation light corresponds to the outer ring. The inner ring excites yellow fluorescence through transmission, and the outer ring, after reflection of the first-color excitation light, excites and emits yellow fluorescence, achieving excitation on both sides of the phosphor wheel. Corresponding to different inner and outer rings, the excitation efficiency is increased, brightness is improved, and regional excitation reduces heat dissipation pressure.

[0121] In other embodiments of this application, the first optical path of the first color excitation light generated by the first light source component incident on the first beam splitter and the second optical path of the light emitted from the first beam splitter via the wavelength conversion component do not overlap.

[0122] In some embodiments, the first light source assembly and the first beam splitter can be configured or aligned along the same central axis, that is, the first color excitation light generated by the first light source assembly hits the first beam splitter directly, thereby realizing the coaxial arrangement of the two elements; in this way, the first optical path of the first color excitation light generated by the first light source assembly incident on the first beam splitter and the second optical path exiting the first beam splitter through the wavelength conversion assembly coincide.

[0123] As described above, by ensuring that the first color excitation light directly and accurately illuminates the first beam splitter, energy loss caused by optical path misalignment is reduced, thus improving the overall light energy utilization rate of the system. The coaxial layout simplifies the optical path design, reduces performance fluctuations caused by alignment errors, enhances the stability and reliability of the system, and effectively saves internal space.

[0124] In other embodiments, the first light source assembly and the first beam splitter may not be configured or aligned along the same central axis. That is, the first color excitation light generated by the first light source assembly is obliquely struck onto the first beam splitter, thereby achieving a non-coaxial layout of the two components. In this way, the first optical path of the first color excitation light generated by the first light source assembly incident on the first beam splitter and the second optical path of the first color excitation light exiting the first beam splitter via the wavelength conversion assembly do not coincide.

[0125] As described above, the non-coaxial design allows for more flexible angle adjustments, providing greater flexibility in system design and helping to adapt to complex or non-standard installation environments. Since the first and second optical paths do not overlap, mutual interference between optical paths can be reduced, facilitating independent optimization of the performance of each optical path and achieving optical path decoupling. The non-coaxial layout is not limited by axial alignment, allowing for more flexible arrangement of component positions in three-dimensional space, which helps optimize the utilization of internal space, especially when the system contains multiple light sources or beam splitters.

[0126] In other embodiments of this application, reference is made to Figure 7 As shown, the light source device 100 further includes one or more of the following: a dissipation element 5, a compound eye 6, at least one first shaping element 7, a second shaping element 8, and a light-diffusing element 9.

[0127] The dissipation element 5 is disposed between the first light source assembly 11 and the first beam splitting element 2;

[0128] The compound eye 6 is positioned between the first beam-splitting element 4 and the dissipation element 5;

[0129] At least one first shaping element 7 is disposed between the first beam splitter 2 and the wavelength conversion component 4;

[0130] The second shaping element 8 and the homogenizing element 9 are positioned in the emission direction of the fluorescence with the first polarization state emitted from the first beam splitter 2.

[0131] In some embodiments, the dissipation element is a dynamically movable diffuser or microlens, and the dissipation means include diffusion treatment or light homogenization treatment to reduce the coherence of the emitted light, thereby effectively reducing speckle.

[0132] In some embodiments, a dissipation element is disposed between the first light source assembly and the first beam splitter. The dissipation element is used to dissipate the first color excitation light with a first polarization state generated by the first light source assembly, thereby reducing speckle during projection.

[0133] In some embodiments, a compound eye is an optical element used to improve and control light output characteristics. For example, a compound eye is used to convert a non-uniform light spot emitted by a point light source into a desired uniform light spot. A compound eye is also called a compound eye lens array or a compound eye optical system. A compound eye can be a glass compound eye.

[0134] In some embodiments, a compound eye is disposed between the first beam-splitting element and the dissipation element. The compound eye is used to uniformly process the light spot of the first color excitation light with the first polarization state generated by the first light source assembly, thereby improving the brightness uniformity and overall visual quality of the image. At the same time, the compound eye can also effectively collect and utilize the light emitted by the light source, reduce light loss, and improve the overall light energy utilization rate of the system.

[0135] In some embodiments, the first shaping element is used to focus the first color excitation light to excite fluorescence. The first shaping element can also be used to focus and shape the emitted fluorescence so that the fluorescence is emitted in parallel. The first shaping element can be a shaping lens.

[0136] In some embodiments, at least one first shaping element is disposed between the first beam splitter and the wavelength conversion component. The first shaping element focuses the first color excitation light with a second polarization state reflected by the first beam splitter onto the wavelength conversion component to excite fluorescence. Simultaneously, the first shaping element focuses and parallelizes the fluorescence emitted from the wavelength conversion component. Thus, by reducing scattering and unnecessary light loss, the shaping element can improve the overall light energy utilization of the system, thereby reducing energy consumption and enhancing the effectiveness of illumination or detection, and improving light energy utilization.

[0137] In some embodiments, the second shaping element is used to focus and shape the emitted fluorescence and / or excitation light of various colors so that the light rays are emitted in parallel. The second shaping element may be a shaping lens.

[0138] In some embodiments, the light-diffusing element is used to perform light-diffusing processing on the light output from the second shaping element.

[0139] In some embodiments, the second shaping element and the homogenizing element are disposed in the emission direction of the fluorescence with a first polarization state emitted by the first beam splitter. The second shaping element and the homogenizing element are used to homogenize the emitted fluorescence and / or the excitation light of each color. In this way, the shaping element and the homogenizing element can transform the originally uneven light intensity distribution into a uniform light field. Through mechanisms such as scattering, refraction or reflection, the shaping element and the homogenizing element can effectively reduce hot spots (overly bright areas) and dark areas in the light spot, improve visual comfort and image quality, and at the same time reduce light energy loss and improve the overall efficiency of the light source system.

[0140] This application provides a light source device, see [link]. Figure 8 , Figure 8 The diagram shown is a schematic representation of a light source device 100, which includes a light source assembly 1 (not shown), a first beam-splitting element 2, a first guiding assembly 3 (not shown), and a wavelength conversion assembly 4.

[0141] The light source assembly 1 includes a fourth light source assembly 14, a first guiding assembly 3 and a first beam splitting element 2 arranged along the optical path direction of the first color excitation light generated by the fourth light source assembly 14, and a wavelength conversion assembly 4 located in the transmission direction of the first color excitation light.

[0142] The first guiding component 3 includes a second beam splitter 31;

[0143] In this process, the first color excitation light is irradiated by the second beam splitter 31 and the first beam splitter 2 to the wavelength conversion component 4 to generate fluorescence including a first polarization state and a second polarization state. The fluorescence of the first polarization state is emitted through the first beam splitter 2, and the fluorescence of the second polarization state is reflected by the first beam splitter 2 and the second beam splitter 31 to the wavelength conversion component 4 to generate fluorescence including a first polarization state and a second polarization state. The first polarization state and the second polarization state are different.

[0144] In some embodiments, the light source assembly is used to generate excitation light and supplementary light, and the light source assembly may include a tri-color laser light source, a monochromatic laser light source, an LED light source, a monochromatic LED light source, and a UV light source, etc.

[0145] It should be noted that the excitation light and the supplementary light, as well as the supplementary light, have different wavelengths. The excitation light can be light with a relatively short wavelength, such as blue laser, blue LED light, and UV light. For example, the excitation light can be blue laser (also known as blue excitation light or blue light), with a main wavelength of 440–470 nm. The supplementary light can be red, green, blue, etc. For example, the supplementary light can include red laser (also known as red excitation light or red light) and / or green laser (also known as green excitation light or green light). Of course, the supplementary light can also be blue laser.

[0146] In some embodiments, the excitation light, the supplementary light, and the fluorescence excited by the excitation light can have polarization characteristics. The excitation light, the supplementary light, and the fluorescence can have parallel (P) polarization and vertical (S) polarization. Here, parallel polarization is also called linear polarization. In other words, the excitation light, the supplementary light, and the fluorescence can have P polarization state and S polarization state.

[0147] In some embodiments, the light source assembly may include a fourth light source assembly for generating a first color excitation light. It should be noted that the first color excitation light may or may not have a polarization state; if the first color excitation light has a polarization state, then the polarization state of the first color excitation light may be an S-polarization state. The first color excitation light may be blue excitation light.

[0148] In some embodiments, the first beam splitter is used to manipulate and separate light of different polarization states in a beam, and can also combine visible light. Exemplarily, the first beam splitter can be used to transmit excitation light of a first polarization state and reflect excitation light of a second polarization state, and / or, the first beam splitter can be used to transmit fluorescence of a first polarization state and reflect fluorescence of a second polarization state. Of course, the first beam splitter can also combine the transmitted or reflected light, where the first and second polarization states are different; the first polarization state can be a P-polarization state. The first beam splitter can be a polarization beam splitter or a conventional beam splitter, such as a PBS, a beam splitter plate, or a wire grid.

[0149] In some embodiments, the first guiding component includes a second beam-splitting element, wherein the second beam-splitting element is used to transmit a first-color excitation light and reflect other light, and the second beam-splitting element can also be used to separate or adjust the energy distribution of incident light (such as the first-color excitation light having a second polarization state) in a specific manner. The second beam-splitting element may be an arc-shaped element with its opening facing the first beam-splitting element. The second beam-splitting element may be an arc-shaped beam splitter or a planar beam splitter.

[0150] In some embodiments, the wavelength conversion component is located in the transmission direction of the first color excitation light. The wavelength conversion component includes at least a wavelength conversion region, which has a wavelength conversion material that can convert the first color excitation light (having a first polarization state or a second polarization state) into fluorescence including the first polarization state and the second polarization state. The wavelength conversion material can be a phosphor or a phosphor, etc.; for example, it can be a yellow phosphor that emits yellow light when excited, such as a yttrium aluminum garnet (YAG) phosphor containing cerium (Ce) as an activator; it can also be a green phosphor, red phosphor, cyan phosphor, orange phosphor, etc. The specific fluorescent material can be selected according to actual needs, and this application does not impose specific limitations on it.

[0151] Of course, the wavelength conversion component may include one or more wavelength conversion regions, each wavelength conversion region may correspond to a wavelength conversion material, and may produce at least one fluorescence band that is different from the excitation light band. That is, the generated fluorescence includes at least one color light with a wavelength band that is different from the excitation light band. For example, the fluorescence may be at least one of red fluorescence, green fluorescence, yellow fluorescence, cyan fluorescence, and orange fluorescence.

[0152] In one feasible scenario, refer to Figure 8 In the example of A, the fourth light source component can generate blue excitation light including S-polarized light, the first beam splitter is a polarization beam splitter, and the second beam splitter is an arc-shaped beam splitter.

[0153] The blue excitation light, including the S-polarized state, generated by the fourth light source component is transmitted through the arc-shaped beam splitter in the first guiding component to the polarization beam splitter. Since the current polarization state of the blue excitation light is S-state, the polarization beam splitter reflects the S-state blue excitation light, thereby reaching the wavelength conversion component to excite fluorescence including both P-polarized and S-polarized states. It should be noted that the proportion of P-polarized fluorescence and S-polarized fluorescence is 50% each.

[0154] Furthermore, the P-polarized fluorescence (i.e., 50% of the P-state fluorescence) is transmitted and emitted through the polarization beam splitter, while the S-polarized fluorescence (i.e., 50% of the S-state fluorescence) is reflected by the polarization beam splitter and then reflected again by the curved beam splitter. It should be noted that because the fluorescence spot is slightly large after diffuse reflection from surface particles in the wavelength conversion region, the curved beam splitter is designed to be slightly focused, preventing the reflected fluorescence spot from exceeding the element size. At this point, the S-polarized fluorescence, after reflection by the curved beam splitter, strikes the polarization beam splitter again. The polarization beam splitter reflects the S-polarized fluorescence to the wavelength conversion component. Here, the 50% S-state fluorescence, after passing through the wavelength conversion component, will again have 50% P-state fluorescence and 50% S-state fluorescence. Furthermore, the P-state fluorescence is transmitted and emitted through the polarization beam splitter, and the S-state fluorescence again follows the same path, repeating the cycle. This reduces the residue of S-state fluorescence and improves fluorescence utilization. Meanwhile, most of the residual blue light in the fluorescence remains in the S state and is reflected by the polarization beam splitter. After passing through the quarter-wave plate twice, it becomes the P state and is transmitted through the polarization beam splitter again. Since the direction of the residual blue light transmitted through the polarization beam splitter is different from the direction of the fluorescence reflected by the polarization beam splitter, the residual blue light will not hit the screen, which can greatly improve the problem of residual blue light in the fluorescence.

[0155] In another feasible scenario, refer to Figure 8 In the example of B, the fourth light source component can generate blue excitation light, the first beam splitter is a beam splitter that transmits P-polarized fluorescence and reflects S-polarized fluorescence, and the second beam splitter is a planar beam splitter that transmits blue light and reflects fluorescence. It should be noted that the outer surface of the first beam splitter may not be perpendicular to or not perpendicular to the light path direction of the blue excitation light generated by the fourth light source component, and the first beam splitter may be set at a certain tilt angle.

[0156] The blue excitation light (which may or may not be p-polarized) generated by the fourth light source component is transmitted through the planar beam splitter in the first guiding component to the first beam splitter element. The first beam splitter element transmits the blue excitation light, which then reaches the wavelength conversion component to excite fluorescence in both p-polarized and s-polarized states. It should be noted that the p-polarized fluorescence and s-polarized fluorescence each account for 50%.

[0157] Furthermore, the S-polarized fluorescence (i.e., 50% S-state fluorescence) is reflected and emitted by the first beam splitter, while the P-polarized fluorescence (i.e., 50% P-state fluorescence) is transmitted through the first beam splitter, then reflected again by the second beam splitter and returned to the first beam splitter. The first beam splitter transmits the P-polarized fluorescence to the wavelength conversion component. At this point, the 50% P-state fluorescence, after passing through the wavelength conversion component, will again result in 50% P-state fluorescence and 50% S-state fluorescence. Further, the S-state fluorescence is reflected and emitted by the first beam splitter, and the P-state fluorescence again undergoes the same path, repeating the cycle. This reduces the residue of P-state fluorescence and improves fluorescence utilization.

[0158] This application provides a light source device, which includes a light source assembly, a first beam splitter, a first guiding assembly, and a wavelength conversion assembly. The light source assembly includes a fourth light source assembly. The first guiding assembly and the first beam splitter are arranged along the optical path direction of a first-color excitation light with a second polarization state generated by the fourth light source assembly. The wavelength conversion assembly is located in the transmission direction of the first-color excitation light. The first guiding assembly includes a second beam splitter. The first-color excitation light passes through the second beam splitter and the first beam splitter to irradiate the wavelength conversion assembly to excite fluorescence with a first polarization state and a second polarization state. The fluorescence with the first polarization state is emitted through the first beam splitter, and the fluorescence with the second polarization state is reflected by the first beam splitter and the second beam splitter to the wavelength conversion assembly to generate fluorescence with both a first polarization state and a second polarization state, where the first polarization state and the second polarization state are different. Thus, firstly, through a carefully designed optical path, it is ensured that the first-color excitation light can effectively excite the wavelength conversion assembly to generate fluorescence, and secondly, the polarization state of the fluorescence is fully utilized. Fluorescence with the first polarization state is directly output through the first beam splitter, reducing light energy loss. Fluorescence with the second polarization state undergoes two beam splitting and re-excitation processes, increasing the chances of light energy conversion and improving the overall system's light conversion efficiency and brightness. Secondly, the fluorescence generated during wavelength conversion contains two polarization states. Through precise control of the beam splitter, these states can be effectively separated and guided to different light paths, enabling refined management of the fluorescence and improving the brightness and color purity of the final output light. This is crucial for applications requiring high-quality lighting or display effects. This design allows for selective utilization and reprocessing of the fluorescence polarization state, enhancing system flexibility and adaptability. Precise control of the polarization state reduces crosstalk and stray light between light paths, improving system stability and reliability. Finally, the compact structural design integrates the light source component, beam splitter, guiding component, and wavelength conversion component into one unit, reducing equipment size, simplifying optical system design, and lowering assembly costs. It may also improve system reliability and durability, thereby increasing system integration.

[0159] In other embodiments of this application, reference continues to be made to...Figure 8 In A, the second beam splitter 31 is an arc-shaped beam splitter, and the light-emitting side of the fourth light source assembly 14 is located on the side of the arc-shaped beam splitter away from the outer surface of the first beam splitter 2. The first color excitation light is transmitted through the arc-shaped beam splitter to the first beam splitter 2, and then reflected by the first beam splitter 2 to the wavelength conversion assembly 4.

[0160] In some embodiments, the fourth light source component can be used to generate a first color excitation light in a second polarization state. Here, the second polarization state can be an S-polarization state. The first color excitation light can be a blue excitation light.

[0161] In some embodiments, the light-emitting side of the fourth light source assembly is located on the side of the curved beam splitter away from the outer surface of the first beam splitter. The fourth light source assembly generates a first color excitation light including a second polarization state, which is incident on the curved beam splitter and transmitted, thereby reaching the first beam splitter (the first beam splitter has a coating characteristic that transmits light of the first polarization state and reflects light of the second polarization state). Then, the first color excitation light of the second polarization state is reflected by the first beam splitter and illuminates the wavelength conversion assembly.

[0162] As described above, firstly, by placing the fourth light source component on one side of the curved beam splitter and utilizing its transmission characteristics, the optical path design can be made more compact and efficient, reducing optical path detours, which helps to reduce light loss and improve the overall optical efficiency of the system. The coating characteristics of the first beam splitter allow it to transmit light of the first polarization state while reflecting light of the second polarization state, meaning that all light rays can be effectively utilized. The excitation light of the second polarization state is reflected to the wavelength conversion component, not only avoiding waste but also achieving precise control over the polarization state of the light, thus improving the utilization rate of polarized light. The use of the curved beam splitter not only optimizes the light transmission path but also provides slight focusing, preventing the reflected fluorescence spot from becoming too large and exceeding the element size.

[0163] In other embodiments of this application, reference is made to Figure 9 As shown, the light source assembly 1 also includes one or more fifth light source assemblies 15;

[0164] The light-emitting side of the fifth light source assembly 15 is located on the side of the first beam splitter 2 away from the outer surface of the second beam splitter 31. The fourth color excitation light, including the second polarization state, generated by the fifth light source assembly 15 is reflected and emitted by the first beam splitter 2.

[0165] The first beam splitter 2 combines the fluorescence in the first polarization state with the fourth color excitation light in the second polarization state for emission; the fourth color excitation light has the same wavelength as the first color excitation light, or the wavelengths of the fourth color excitation light and the corresponding colors of the fluorescence do not overlap or partially overlap.

[0166] In some embodiments, the light source assembly may further include a fifth light source assembly for generating a fourth color excitation light comprising a second polarization state. Here, the second polarization state may be an S-polarization state. The fourth color excitation light may include, but is not limited to, blue excitation light, green excitation light, and red excitation light.

[0167] In some embodiments, the fact that the fourth color excitation light has the same wavelength as the first color excitation light can be understood as the fourth color excitation light and the first color excitation light being excitation light of the same color (such as blue), and therefore, excitation light of the same color has the same wavelength.

[0168] In some embodiments, the fact that the wavelengths of the fourth color excitation light and the corresponding colors of the fluorescence do not overlap or partially overlap can be understood as the wavelength of the fourth color excitation light not overlapping or partially overlapping with the wavelength of the fluorescence excited by the first color excitation light. For example, the wavelength of the red laser does not overlap with the wavelength of the green fluorescence excited by the blue laser, and the wavelengths of the blue laser and the green laser partially overlap with the wavelengths of the green fluorescence excited by the blue laser, respectively.

[0169] In some embodiments, the light-emitting side of the fifth light source component is located on the side of the first beam splitter away from the outer surface of the second beam splitter component. The fifth light source component generates a fourth color excitation light including a second polarization state, which is incident on the first beam splitter and reflected. Further, the first beam splitter emits the fourth color excitation light having a second polarization state together with the fluorescence having a first polarization state generated by the wave-light conversion component.

[0170] As described above, firstly, combining narrow-band excitation light as supplementary light with wide-band fluorescence effectively improves the overall output brightness, allowing the light source device to balance color gamut and brightness, while reducing speckle and color fringing issues and improving the quality of the projected image. Secondly, by adding multiple fifth light source components, the configuration of the light source can be flexibly adjusted as needed. Whether it's to improve brightness, expand the color gamut, or adapt to different application scenarios, this greatly enhances the system's flexibility and future upgrade potential.

[0171] In other embodiments of this application, the fifth light source assembly includes a three-color laser light source and a movable guiding assembly. The movable guiding assembly includes a third phase difference element, a second reflective element, and a third beam splitter. The excitation light of each color emitted by the three-color laser light source is converted into excitation light of each color including a second polarization state by the third phase difference element. A portion of the excitation light of each color in the second polarization state is reflected by the third beam splitter, a portion is transmitted through the second reflective element, and a portion is reflected by the third beam splitter and transmitted through the second reflective element, and then guided to the first beam splitter.

[0172] Among them, the three-color laser light source is used to generate excitation light of multiple colors (such as red, green and blue) simultaneously.

[0173] In some embodiments, the light-emitting side of the three-color laser light source is located on the side of the third phase difference element away from the outer surface of the movable guide assembly. It should be noted that the three-color laser light source can provide extremely high color purity and brightness, significantly enhancing the color saturation and dynamic range of the display system, thereby enhancing color performance.

[0174] In some embodiments, the movable guiding component includes a third phase difference element, a second reflective element, and a third beam splitter element. It should be noted that the third phase difference element, the second reflective element, and the third beam splitter element are all adjustable or movable elements, and the number, position, and size of these elements can be adjusted according to the placement of the three-color lasers and the required proportion of P-state and S-state components in the blue light. This application does not impose specific limitations on these aspects.

[0175] The aforementioned third phase difference element is used to change the polarization state of each color of excitation light, thereby ensuring that the polarization states of each color of excitation light incident on the first beam-splitting element meet the design requirements. Alternatively, the proportion of different polarization states of the blue excitation light can be adjusted by changing the angle at which the excitation light is incident on the third phase difference element, thus controlling the proportion of blue excitation light during fluorescence excitation and consequently adjusting the color gamut and brightness of the light source device. The third phase difference element can be a half-wave plate or a quarter-wave plate.

[0176] The aforementioned third beam-splitting element is used to transmit excitation light of a specific color (such as red light and / or green light) and reflect excitation light of a first color (such as blue light). The third beam-splitting element can also be used to separate or adjust the energy distribution of incident light (such as excitation light of a first color with a first polarization state) in a specific manner. The third beam-splitting element can be a planar beam splitter.

[0177] The aforementioned second reflective element is used to change the direction of light transmission, that is, to change the direction of light propagation by reflection. Of course, the second reflective element is also used to transmit first color excitation light (such as blue light) and reflect specific color excitation light (such as red light and / or green light). The second reflective element can be a plane mirror.

[0178] In some embodiments, a three-color laser source generates excitation light of various colors, which, after passing through different arrangements of the laser and a third phase difference element, yields a first-color excitation light (e.g., blue light) with a first polarization state and a second-color excitation light (e.g., red light and / or green light) with a second polarization state. The first-color excitation light with the first polarization state and the second-color excitation light with the second polarization state are guided by a third beam splitter and / or a second reflector to reach the first beam splitter.

[0179] As described above, firstly, the introduction of the movable guiding components, particularly the combination of the third phase difference element, the second reflective element, and the third beam splitter, provides unprecedented flexibility for optical path design. By adjusting the position or angle of these components, the path, phase, and polarization state of each color excitation light can be dynamically adjusted, thereby optimizing the distribution and utilization of light energy in different operating modes and achieving dynamic optical path adjustment. Simultaneously, the movable guiding components control the P and S ratio in the blue laser, enabling high and low color gamut and brightness switching. Furthermore, the third phase difference element can precisely control the polarization state of the color excitation light generated by the laser source, and in conjunction with the dual reflection and transmission mechanism of the second reflective element and the third beam splitter, achieves efficient recovery and reuse of light energy.

[0180] In other embodiments of this application, the second beam-splitting element is a planar beam-splitting element, which includes a first part and a second part, wherein the first part and the second part are arranged in one of the following ways:

[0181] The first part is the middle part of the planar beam splitter, and the second part is the surrounding part.

[0182] The first part is the upper half of the planar beam splitter, and the second part is the lower half of the planar beam splitter excluding the upper half.

[0183] The first part is a hole, or a dichroic element that transmits first-color excitation light and reflects fluorescence, or an element that transmits first-color excitation light;

[0184] The second part is a reflector, or a dichroic element that transmits excitation light of the first color and reflects fluorescence.

[0185] As described above, the second beam splitter can achieve precise control over light through different configurations. When the first part of the second beam splitter is a blue-transmitting, fluorescent dichroic element or a blue-transmitting element, while the second part is a mirror or another type of dichroic element, this structure can efficiently separate specific wavelengths (such as blue light) from other wavelengths, thereby improving spectral separation efficiency. By precisely controlling the optical path based on the different optical properties of the middle and surrounding parts of the second beam splitter, stray light can be effectively filtered out, enhancing the purity of the desired signal. When the first part is an aperture, allowing light along a specific path to pass through while other parts split or reflect light, this design helps optimize the distribution and utilization of light energy in the entire optical system, reducing losses and improving system efficiency.

[0186] In other embodiments of this application, the third optical path of the first color excitation light generated by the fourth light source component incident on the first beam splitter and the fourth optical path of the light emitted from the first beam splitter via the wavelength conversion component do not overlap.

[0187] In some embodiments, the fourth light source assembly and the first beam splitter can be configured or aligned along the same central axis, that is, the first color excitation light generated by the fourth light source assembly can strike the first beam splitter directly, thereby achieving a coaxial arrangement of the two elements; thus, the third optical path of the first color excitation light generated by the fourth light source assembly incident on the first beam splitter and the fourth optical path exiting the first beam splitter after passing through the wavelength conversion assembly coincide. It should be noted that the first beam splitter can be positioned at an angle.

[0188] As described above, by ensuring that the first color excitation light directly and accurately illuminates the first beam splitter, energy loss caused by optical path misalignment is reduced, thus improving the overall light energy utilization rate of the system. The coaxial layout simplifies the optical path design, reduces performance fluctuations caused by alignment errors, enhances the stability and reliability of the system, and effectively saves internal space. The angled / non-coaxial architecture corresponds to the different positions and coating characteristics of the second beam splitter.

[0189] In other embodiments, the fourth light source assembly and the first beam splitter may not be configured or aligned along the same central axis. That is, the first color excitation light generated by the fourth light source assembly is obliquely incident on the first beam splitter, thereby achieving a non-coaxial layout of the two components. In this way, the third optical path of the first color excitation light generated by the fourth light source assembly incident on the first beam splitter and the fourth optical path exiting the first beam splitter after passing through the wavelength conversion assembly do not coincide. It should be noted that the first beam splitter can be obliquely positioned.

[0190] As described above, the non-coaxial design allows for more flexible angle adjustments, providing greater flexibility in system design and helping to adapt to complex or non-standard installation environments. Since the third and fourth optical paths do not overlap, mutual interference between optical paths can be reduced, facilitating independent optimization of the performance of each optical path and achieving optical path decoupling. The non-coaxial layout is not limited by axial alignment, allowing for more flexible arrangement of component positions in three-dimensional space, which helps optimize the utilization of internal space, especially when the system contains multiple light sources or beam splitters.

[0191] In other embodiments of this application, reference is made to Figure 10 As shown, the light source assembly 1 also includes a sixth light source assembly 16, the light-emitting side of which is located on the side of the wavelength conversion assembly 4 away from the first beam splitter 2.

[0192] The wavelength conversion component 4 is dynamically active. The wavelength conversion component 4 is provided with a transmission area distributed along the circumference. The fifth color excitation light generated by the sixth light source component 16, including the first polarization state or the second polarization state, reaches the first beam splitter 2 through the transmission area. The transmission area includes one or more of the light transmission area, the aperture, and the diffusion area. The wavelength of the fifth color excitation light is the same as that of the first color excitation light, or the wavelength of the fifth color excitation light does not overlap or partially overlaps with the color wavelength corresponding to the fluorescence.

[0193] In some embodiments, a sixth light source component may include one or more components, which are used to generate a fifth color excitation light including a first polarization state or a second polarization state. Here, the first polarization state may be a P-polarization state, and the second polarization state may be an S-polarization state. The fifth color excitation light may be a red excitation light or a green excitation light as supplementary light. Of course, the fifth color excitation light may also be a blue excitation light as supplementary light to supplement the blue laser, green laser, or red laser on the screen and reduce the heat dissipation pressure of the three-color laser.

[0194] In some embodiments, the wavelength conversion component includes at least a rotatable drive component, which enables dynamic activity or dynamic rotation by rotating the wavelength conversion component. The rotatable drive component may be a rotary motor.

[0195] In some embodiments, the wavelength conversion component includes a transmission region distributed along a circumferential direction, wherein the transmission region is used to transmit a sixth light source component for generating a fifth color excitation light including a first polarization state or a second polarization state, so as to supplement the blue laser, green laser or red laser on the screen and reduce the heat dissipation pressure of the three-color laser.

[0196] In some embodiments, refer to Figure 10 In the A component, the fifth color excitation light generated by the sixth light source component, including the first polarization state, passes through the transmission region in the wavelength conversion component to reach the first beam splitter, and is transmitted out through the first beam splitter, thereby supplementing the fifth color excitation light on the screen and reducing the heat dissipation pressure of the three-color laser.

[0197] In some embodiments, refer to Figure 10 In the B component, the fifth color excitation light generated by the sixth light source component, including the second polarization state, passes through the transmission region in the wavelength conversion component to reach the first beam splitter, and is reflected out by the first beam splitter to supplement the lighting system with the fifth color excitation light.

[0198] In other embodiments of this application, a wavelength conversion component is provided with a wavelength conversion region distributed along the circumferential direction. The fluorescence of the second polarization state is reflected to the wavelength conversion component by the first beam splitter and the second beam splitter, and the fluorescence including the first polarization state and the second polarization state is generated by reflection by the wavelength conversion region.

[0199] In some embodiments, the wavelength conversion component includes at least a rotatable drive component, which enables dynamic activity or dynamic rotation by rotating the wavelength conversion component. The rotatable drive component may be a rotary motor.

[0200] In some embodiments, the wavelength conversion component includes a wavelength conversion region distributed along a circumferential direction, wherein the wavelength conversion region is used to convert excitation light of a first wavelength distribution into fluorescence of a second wavelength distribution, also known as stimulated light, and to shift the wavelength so as to obtain light of different wavelengths.

[0201] In some embodiments, the first color excitation light is irradiated into the wavelength conversion region of the wavelength conversion assembly through at least the first beam splitter, the second beam splitter, and the first phase difference element, thereby exciting the generation of fluorescence including a first polarization state and a second polarization state. The fluorescence of the first polarization state is emitted through the first beam splitter, and the fluorescence of the second polarization state is reflected by the first beam splitter and the second beam splitter to the wavelength conversion assembly, where fluorescence including the first polarization state and the second polarization state is generated through the wavelength conversion region.

[0202] In some embodiments, refer to Figure 11 As shown, the light source assembly includes a seventh light source assembly 17. The colored excitation light generated by the seventh light source assembly 17 is incident on the fifth optical path of the first beam splitter 2, and is perpendicular to the fourth optical path of the first colored excitation light emitted from the first beam splitter 2 via the wavelength conversion assembly 4.

[0203] Here, the seventh light source component is located above the first beam splitter, and the seventh light source component and the first beam splitter can be configured or aligned along the same central axis. The color excitation light generated by the seventh light source component strikes the first beam splitter directly; thus, the color excitation light generated by the seventh light source component is incident on the fifth optical path of the first beam splitter, and is perpendicular to the fourth optical path of the first color excitation light exiting the first beam splitter via the wavelength conversion component. It should be noted that the first beam splitter can be positioned at an angle.

[0204] In other embodiments of this application, reference continues to be made to... Figure 10 The sixth light source component includes a third color light source, which generates a fifth color excitation light including a first polarization state or a second polarization state; or,

[0205] The sixth light source component includes a third color laser light source, a fifth phase difference element, or a sixth phase difference element. The fifth color excitation light generated by the third color laser light source is passed through the fifth phase difference element to obtain fifth color excitation light including a first polarization state, or the fifth color excitation light generated by the third color laser light source is passed through the sixth phase difference element to obtain fifth color excitation light including a second polarization state.

[0206] In some embodiments, the sixth light source component may include one or more second color light sources, each second color light source being a light source capable of generating polarized light with a preset polarization state and / or a preset color. For example, the second color light source may generate fifth color excitation light including a first polarization state or a second polarization state.

[0207] In some embodiments, the fifth phase difference element may be a movable element or an element set in a fixed position. Of course, the fifth phase difference element may also be an element set at an angle. This application does not impose any specific limitations on this.

[0208] In some embodiments, the fifth color excitation light may include, but is not limited to, one or more of blue excitation light, green excitation light, and red excitation light.

[0209] In some embodiments, the sixth light source component includes a third-color laser light source, a fifth phase difference element, or a sixth phase difference element. The fifth-color excitation light generated by the third-color laser light source is passed through the fifth phase difference element to obtain fifth-color excitation light with a first polarization state; or, the fifth-color excitation light generated by the third-color laser light source is passed through the sixth phase difference element to obtain fifth-color excitation light with a second polarization state. Thus, firstly, the laser light source itself has high directionality and monochromaticity, and combined with the third-color laser light source, high-quality fifth-color excitation light can be generated. Then, by introducing the fifth phase difference element, the sixth light source component enables the device to precisely control the polarization state of the fifth-color excitation light. Through carefully designed phase difference adjustment, signal strength and resolution are improved. Finally, by controlling the polarization state of the excitation light, interference from ambient light and the influence of stray light can be effectively reduced, significantly improving the contrast and color vividness of the display.

[0210] In other embodiments of this application, the wavelength conversion component further includes a phase difference region. The emitted light from the light source device includes a first timing sequence and a second timing sequence. Through the first timing sequence, the first color excitation light is emitted as fluorescence in a first polarization state via the wavelength conversion component and the first beam splitter. The fluorescence in the first polarization state includes fluorescence in a first polarization state excited by the wavelength conversion component and fluorescence in a first polarization state recovered by polarization. Through the second timing sequence, the first color excitation light is emitted as first color excitation light after polarization conversion via the phase difference region.

[0211] In some embodiments, the first color excitation light is used to excite fluorescence via a wavelength conversion component, and the second timing is that the second color excitation light is reflected by a phase difference region as blue light in the light source.

[0212] In some embodiments, through a first timing sequence, the first color excitation light is absorbed by the wavelength conversion component and converted into fluorescence with a specific polarization state. This process not only directly converts the color of the light but also significantly improves the overall light conversion efficiency and output brightness by recovering and utilizing fluorescence with the same polarization state. Through a second timing sequence, the first color excitation light undergoes polarization conversion through a phase difference region and is emitted again. This not only demonstrates the system's ability to quickly switch between different operating modes but also provides the possibility for dynamic light field modulation, encoding, or decoding. Furthermore, by precisely controlling the polarization state, the contrast and color saturation of the displayed image can be effectively improved. The combination of the fluorescence in the first polarization state and the polarization conversion of the original excitation light helps eliminate unnecessary backlight scattering, making the displayed image more vivid and clear. Finally, the introduction of the phase difference region allows for active modulation of the light's polarization state, meaning the system can adjust the characteristics of the output light as needed, such as changing the polarization direction to adapt to different optical components or meet specific application requirements, enhancing system flexibility.

[0213] In other embodiments of this application, reference is made to Figure 12 As shown, the light source device 100 further includes one or more of the following: a dissipation element 5, a compound eye 6, at least one first shaping element 7, a second shaping element 8, and a light-diffusing element 9.

[0214] The dissipation element 5 is disposed between the fourth light source assembly 14 and the second beam splitter 31;

[0215] The compound eye 6 is positioned between the second beam-splitting element 31 and the dissipation element 5;

[0216] At least one first shaping element 7 is disposed between the first beam splitter 2 and the wavelength conversion component 4;

[0217] The second shaping element 8 and the homogenizing element 9 are positioned in the emission direction of the first beam splitter 2, which emits fluorescence with a first polarization state or fluorescence with a second polarization state.

[0218] In some embodiments, the dissipation element is a dynamically movable diffuser or microlens, and the dissipation means include diffusion treatment or light homogenization treatment to reduce the coherence of the emitted light, thereby effectively reducing speckle.

[0219] In some embodiments, a dissipation element is disposed between the first light source assembly and the second beam splitter to dissipate the first color excitation light generated by the first light source assembly, thereby reducing speckle during projection.

[0220] In some embodiments, a compound eye is an optical element used to improve and control light output characteristics. For example, a compound eye is used to convert a non-uniform light spot emitted by a point light source into a desired uniform light spot. A compound eye is also called a compound eye lens array or a compound eye optical system. A compound eye can be a glass compound eye.

[0221] In some embodiments, a compound eye is disposed between the second beam-splitting element and the dissipation element. The compound eye is used to uniformly process the light spot of the first color excitation light generated by the first light source assembly, thereby improving the brightness uniformity and overall visual quality of the image. At the same time, the compound eye can also effectively collect and utilize the light emitted by the light source, reduce light loss, and improve the overall light energy utilization rate of the system.

[0222] In some embodiments, the first shaping element is used to focus the first color excitation light to excite fluorescence. The first shaping element can also be used to focus and shape the emitted fluorescence so that the fluorescence is emitted in parallel. The first shaping element can be a shaping lens.

[0223] In some embodiments, at least one first shaping element is disposed between the first beam splitter and the wavelength conversion component. The first shaping element focuses the first color excitation light with a second polarization state reflected by the first beam splitter onto the wavelength conversion component to excite fluorescence. Simultaneously, the first shaping element focuses and parallelizes the fluorescence emitted from the wavelength conversion component. Thus, by reducing scattering and unnecessary light loss, the shaping element can improve the overall light energy utilization of the system, thereby reducing energy consumption and enhancing the effectiveness of illumination or detection, and improving light energy utilization.

[0224] In some embodiments, the second shaping element is used to focus and shape the emitted fluorescence and / or excitation light of various colors so that the light rays are emitted in parallel. The second shaping element may be a shaping lens.

[0225] In some embodiments, the light-diffusing element is used to perform light-diffusing processing on the light output from the second shaping element.

[0226] In some embodiments, the second shaping element and the homogenizing element are disposed in the emission direction of the fluorescence with a first polarization state emitted by the first beam splitter. The second shaping element and the homogenizing element are used to homogenize the emitted fluorescence and / or the excitation light of each color. In this way, the shaping element and the homogenizing element can transform the originally uneven light intensity distribution into a uniform light field. Through mechanisms such as scattering, refraction or reflection, the shaping element and the homogenizing element can effectively reduce hot spots (overly bright areas) and dark areas in the light spot, improve visual comfort and image quality, and at the same time reduce light energy loss and improve the overall efficiency of the light source system.

[0227] In some embodiments, a dissipation element is disposed between the fourth light source assembly and the second beam splitter; a glass compound eye is disposed between the second beam splitter and the dissipation element; at least one first shaping element is disposed between the first beam splitter and the wavelength conversion assembly; continuing to refer to Figure 12 In point A, the second shaping element and the homogenizing element are positioned in the emission direction of the fluorescence with the first polarization state emitted from the first beam-splitting element; or, continuing to refer to... Figure 12 In the first beam splitter, B, the second shaping element and the homogenizing element are positioned in the emission direction of the fluorescence with the second polarization state emitted from the first beam splitter.

[0228] As described above, by placing the dissipation element between the fourth light source component and the second beam splitter, stray light and light propagation in undesired directions can be effectively suppressed, thereby reducing light energy loss and improving the overall signal-to-noise ratio of the system. Simultaneously, the homogenizing element, used in conjunction with the second shaping element, ensures a more uniform light distribution in both the first and second polarization states of fluorescence emission, thus improving light energy utilization and uniformity. Secondly, the glass compound eye, located between the second beam splitter and the dissipation element, effectively focuses and guides light, enhancing the system's spatial resolution and imaging stability. Then, at least one first shaping element is placed between the first beam splitter and the wavelength conversion component, pre-shaping the beam incident on the wavelength conversion component to ensure a more efficient energy conversion process. The second shaping element further adjusts the fluorescence emission direction according to the desired polarization state, ensuring that the directionality and shape of the output beam meet the specific requirements of subsequent applications. Finally, the light source device flexibly selects the optical path configuration according to actual needs, demonstrating high flexibility and customization capabilities in optimizing the processing path of both the first and second polarization states of fluorescence, thereby improving the system's flexibility and adaptability.

[0229] In other embodiments of this application, the light source device further includes an illumination system, wherein fluorescence having a second polarization state is emitted into the illumination system via a first beam splitter.

[0230] Therefore, using fluorescence in its second polarization state as a lighting source offers higher efficiency and better illumination compared to traditional light sources. Polarized light is directional, which can reduce ambient light interference and improve contrast in specific applications, thereby enhancing lighting efficiency and quality. Simultaneously, polarized light illumination reduces glare and reflections.

[0231] The following describes the implementation process of the embodiments of this application in a feasible application scenario.

[0232] In related technologies, since a fixed polarization state is required to be applied to the LCOS chip in a Liquid Crystal on Silicon (LCOS) system, the light entering the illumination system in an LCOS system needs to be a single polarization light source. However, maintaining a single polarization state is relatively easy for lasers, which can be achieved simply by placing the light source or using a half-wave plate. But it is more difficult for fluorescence. If conventional wavelength combining methods are used, the fluorescence will always contain 50% P-state and S-state. Only a component such as a Power Conversion System (PCS) is needed to apply the fluorescence to the LCOS chip in a single polarization state. However, the above method has problems such as high PCS cost and difficult manufacturing process.

[0233] To address the aforementioned technical problems, this application provides the following projection systems (corresponding to the aforementioned light source devices) with different embodiments.

[0234] Example 1

[0235] Reference Figure 13 As shown, the projection system includes a light source, a light combining and guiding section, a fluorescence conversion component, a light filtering component, and a light homogenizing component; wherein,

[0236] The light source in the aforementioned light source section can be a three-color laser. Specifically, the three-color laser 101, half-wave plate (or quarter-wave plate) 1018, half-wave plate (or quarter-wave plate) 1020 and 1021, reflector 103, and beam splitter 105 constitute the first group of light sources. The three-color laser 102, half-wave plate (or quarter-wave plate) 1019, half-wave plate (or quarter-wave plate) 1022 and 1023, reflector 104, and beam splitter 106 constitute the second group of light sources. Beam splitters 105 and 106 are used to reflect red light. It should be noted that each entire light source section is an adjustable device, ensuring that the red and green light from the three-color laser are incident on the polarization beam splitter 109 in an S-state, while the blue light needs to be incident on the polarization beam splitter 109 partly in a P-state and partly in an S-state. Therefore, a half-wave plate (or a quarter-wave plate) needs to be added to the three-color laser channel to ensure that the polarization states of the lasers incident on the polarization beam splitter 109 meet the design requirements. Furthermore, the blue light can be adjusted using the half-wave plate (or quarter-wave plate). The proportion of polarization states controls the proportion of excitation light in the laser fluorescence, thus adjusting the system's color gamut and brightness. Half-wave plates (or quarter-wave plates) 1018, 1019, 1020, 1021, 1022, and 1023 can all be moved. The specific number, position, and size used need to be adjusted according to the placement of the three-color lasers and the required proportion of P and S components in the blue light. Alternatively, a quarter-wave plate can be used, and the proportion of P and S components in the blue light can be controlled by adjusting the angle.

[0237] The aforementioned beam combining guide section is used to shape and combine fluorescence with blue light projected onto the screen; the beam combining guide section includes a shaping element 1016 and a light homogenizing element 1017, wherein the shaping element 1016 can be a shaping lens for shaping fluorescence and three-color laser; the light homogenizing element 1017 can be a compound eye for homogenizing the beam.

[0238] The aforementioned fluorescence conversion component is used to convert excitation light into the desired fluorescence. The fluorescence conversion component (also known as wavelength conversion element) 1015 includes at least a rotating motor, a wavelength conversion material region, a dissipation region, and a color filter region. The wavelength conversion material can be phosphor, which can generate fluorescence under excitation light (blue laser, blue LED, or UV light). The fluorescence region can be coated with yellow powder, etc. Different characteristic filters can be added to different powder layers to improve the color gamut. It can also be a static phosphor, which is not limited here.

[0239] The aforementioned filtering components are used to filter residual blue light in fluorescence through the optical path system and the coating. The filtering components include a polarizing beam splitter 109, an arc-shaped beam splitter 1010, a quarter-wave plate 1011, an arc-shaped mirror 1012, and shaping elements 1013 and 1014. The polarizing beam splitter 109 reflects S-state light and transmits P-state light. The coating of the arc-shaped beam splitter 1010 transmits blue light and reflects other light. The shaping elements 1013 and 1014 can focus the excitation light to excite fluorescence and shape the emitted fluorescence.

[0240] The aforementioned beam homogenizing component is used to homogenize the light beam. The beam homogenizing component includes a dynamic dissipation element 107 and a glass compound eye 108. The dynamic dissipation element 107 is used to reduce speckle, and the glass compound eye 108 is used to make the light spot incident on the beam homogenizing element 1017 more uniform.

[0241] The specific optical path of this scheme is as follows:

[0242] Three-color laser channel: The red and green lasers in the three-color laser are arranged in different ways and the effect of the half-wave plate causes them to be incident on the polarization beam splitter 109 in the S state. After being reflected by the polarization beam splitter 109, they are shaped by the shaping element 1016 and then homogenized by the homogenizing element 1017. The blue laser in the three-color laser is arranged in different ways and the movable half-wave plate and mirror cause part of the blue light in the three-color laser to be incident on the polarization beam splitter 109 in the P state and be transmitted, and part of it to be incident on the polarization beam splitter 109 in the S state and be reflected. Finally, the part of the blue light in the S state is incident on the homogenizing element 1017 together with the red and green lasers.

[0243] Fluorescence channel: Blue light in the P-state of the three-color laser is incident on the polarization beam splitter 109 and is transmitted. It then passes through the curved beam splitter 1010 and is transmitted again. It then passes through the quarter-wave plate 1011 and is reflected by the curved mirror 1012. It then passes through the quarter-wave plate 1011 again. Due to passing through the quarter-wave plate 1011 twice, the P-state blue light is converted to the S-state. It then passes through the polarization beam splitter 109 again. Since the blue light is currently in the S-state polarization state, it is reflected on the polarization beam splitter 109. After being shaped and focused by the shaping elements 1013 and 1014, it is then directed to the wavelength conversion element 1015 to excite fluorescence.

[0244] Since the proportions of P and S in the fluorescence are 50% and 50% of the P-state fluorescence passes through shaping elements 1013 and 1014, and then is transmitted through polarization beam splitter 109. After the P-state fluorescence is shaped by shaping element 1016, it is projected onto homogenizing element 1017. The remaining 50% of the S-state fluorescence is reflected after passing through the polarization beam splitter 109, and then reflected again by the curved beam splitter 1010. Since the fluorescence spot is slightly large after being diffusely reflected by the phosphor particles and then shaped by the shaping elements 1013 and 1014, the curved beam splitter 1010 is set to be curved to slightly focus the fluorescence and prevent the reflected spot from being too large to exceed the element size. This part of the S-state fluorescence, after being reflected by the curved beam splitter 1010, hits the polarization beam splitter 109 again and is reflected again. Then it enters the wavelength conversion element 1015 and is reflected again. Of this S-state fluorescence, 50% of the P-state and S-state fluorescence will be reflected. The P-state fluorescence is transmitted through the polarization beam splitter 109, and the S-state fluorescence goes through the same path again, repeating the cycle.

[0245] Residual blue light channel: Most of the residual blue light in the fluorescence is emitted in the S state and reflected by the polarization beam splitter 109. After passing through the quarter wave plate twice, it becomes the P state and is transmitted through the polarization beam splitter 109. Since the direction of the residual blue light transmitted is different from the direction of the fluorescence, it will not pass through the homogenizing compound eye to hit the screen. Therefore, the problem of residual blue light in the fluorescence can be greatly improved. Moreover, the entire light source system does not need to use PCS to realize the fluorescence hitting various chips in a single polarization state.

[0246] Example 2

[0247] Reference Figure 14 As shown, the difference between this embodiment and Embodiment 1 is that the curved reflector 1012 and the quarter-wave plate 1011 are removed, and a blue light source 1024 and a shaping element 1025 are added. In this embodiment, all three-color lasers in the S-state are used as light on the screen, and no part of the P-state blue light is separated as an excitation source. The S-state blue light emitted by the blue light source 1024 is transmitted through the shaping element 1025, reflected by the polarization beam splitter 109, and then hits the wavelength conversion element 1015 through the shaping elements 1013 and 1014 to excite fluorescence. The fluorescence path is the same as in Embodiment 1, and this will not be described again in this application.

[0248] Example 3

[0249] Reference Figure 15As shown, the difference between Embodiment 3 and Embodiment 1 is that an additional set of light source components is added. The added light source components include a tri-color laser 1026, and a new red-reflecting beam splitter 1027, a reflector 1028, and movable half-wave plates (or quarter-wave plates) 1029, 1030, and 1031 in front of the laser channel of the tri-color laser 1026. The half-wave plate (or quarter-wave plate) can adjust the ratio of P and S of blue light. It should be noted that adding an additional set of light source components can improve high color gamut and high brightness.

[0250] Example 4

[0251] Reference Figure 16 As shown, the difference between Embodiment 4 and Embodiment 1 is that an additional light source 1032 is added, which can be a red laser or a green laser. By placing the light source 1032 or adding a half-wave plate 1033, the light emitted by the light source 1032 is in the P state. In addition, in this embodiment, the wavelength conversion element 1015 contains a transmission region, so that the light emitted by the light source 1032 is transmitted through the wavelength conversion element 1015 and then enters the polarization beam splitter 109 to supplement the green laser or red laser on the screen and reduce the heat dissipation pressure of the three-color laser.

[0252] Example 5

[0253] Reference Figure 17 As shown, the light source system includes a blue laser source 1034, a deformable mirror (DM) 1035 for reflecting transmitted blue light from fluorescence, a polarizing beam splitter 1036 for filtering P-state fluorescence and reflecting S-state fluorescence, a wavelength conversion component 1015, and an illumination system 1037. The polarizing beam splitter 1036 can be a beam splitter, a wire grid, or a photodiode (PBS). Here, the blue light generated by the blue laser source 1034 passes through the mirror 1035 and the polarizing beam splitter 1036 to reach the wavelength conversion component 1015 to excite fluorescence. After reflection on the wavelength conversion component 1015, half of the fluorescence is in the P-state and half in the S-state. The S-state fluorescence is reflected by the polarizing beam splitter 1036 and enters the illumination system. The P-state fluorescence is transmitted through the polarizing beam splitter 1036 and strikes the mirror 1035. Since the reflector 1035 only transmits blue light and reflects all other light, the P-state fluorescence is reflected after passing through the reflector 1035 and then hits the wavelength conversion component 1015 by the polarization beam splitter 1036, resulting in half P-state fluorescence and half S-state fluorescence. This cycle repeats, ensuring that all the fluorescence entering the illumination system is in the S-state, thus saving PCS.

[0254] This application also provides a projection device, see embodiments thereof. Figure 18 The projection device 200 includes the light source device 100 described in any of the above embodiments.

[0255] In some embodiments, the projection device may also include other components, such as a projection lens, the configuration of which can be found in related technologies and will not be described in detail here.

[0256] It should be understood that the terms "an embodiment," "an embodiment," "an embodiment of this application," "the foregoing embodiment," "some embodiments," or "some implementations" mentioned throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, the phrases "an embodiment," "an embodiment," "an embodiment of this application," "the foregoing embodiment," "some embodiments," or "some implementations" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above embodiments of this application are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0257] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0258] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0259] In addition, each functional unit in the various embodiments of this application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0260] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media that can store program code, such as mobile storage devices, read-only memory (ROM), magnetic disks, or optical disks.

[0261] Alternatively, if the integrated units described above are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, or the parts that contribute to related technologies, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0262] It is worth noting that the accompanying drawings in this application are only for illustrating the schematic positions of various devices on the terminal device and do not represent their actual positions in the terminal device. The actual positions of each device or area may be changed or shifted according to the actual situation (e.g., the structure of the terminal device). Furthermore, the proportions of different parts in the terminal device in the drawings do not represent the actual proportions.

[0263] The above description is merely an embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A light source device, characterized in that, The light source device includes a light source assembly, a first beam-splitting element, a first guiding assembly, and a wavelength conversion assembly, wherein, The light source assembly includes a first light source assembly, the first beam splitting element and the first guiding assembly are arranged along the optical path direction of the first color excitation light including the first polarization state generated by the first light source assembly, and the wavelength conversion assembly is located in the transmission direction of the first color excitation light; The first guiding component includes a second beam splitter and a first phase difference element; The first color excitation light is guided by the first beam splitter, the second beam splitter, and the first phase difference element to irradiate the wavelength conversion component to generate fluorescence including the first polarization state and the second polarization state. The fluorescence of the first polarization state is emitted through the first beam splitter, and the fluorescence of the second polarization state is reflected by the first beam splitter and the second beam splitter to the wavelength conversion component to generate fluorescence including the first polarization state and the second polarization state. This process is repeated so that the first beam splitter emits all the fluorescence of the first polarization state, and the first polarization state is different from the second polarization state.

2. The apparatus according to claim 1, characterized in that, The first guiding component further includes a first reflecting element; wherein, the first phase difference element is located between the second beam splitter and the first reflecting element, the first phase difference element is disposed adjacent to the first reflecting element, and the first phase difference element is disposed at a distance from the second beam splitter; The light-emitting side of the first light source component is located on the side of the first beam splitter away from the outer surface of the first guide component. The first color excitation light is transmitted through the first beam splitter to the first guide component, and then the second beam splitter, the first phase difference element and the first reflection element perform polarization state conversion and guide it to the wavelength conversion component.

3. The apparatus according to claim 1 or 2, characterized in that, The first light source component includes one or more, The first light source assembly includes a first color light source, which generates first color excitation light including the first polarization state; or, The first light source assembly includes a first color laser light source and a second phase difference element. The first color excitation light generated by the first color laser light source is passed through the second phase difference element to obtain first color excitation light including the first polarization state.

4. The apparatus according to claim 1 or 2, characterized in that, The light source assembly further includes one or more second light source assemblies, which may be the same as or different from the first light source assembly. The light-emitting side of the second light source component is located on the side of the first beam splitter away from the outer surface of the first guiding component, and the second color excitation light generated by the second light source component, including the second polarization state, is reflected and emitted by the first beam splitter. The first beam splitter combines the fluorescence in the first polarization state with the excitation light of the second color in the second polarization state for emission. Wherein, the second color excitation light has the same wavelength as the first color excitation light, or the second color excitation light does not overlap or partially overlaps with the color wavelength corresponding to the fluorescence.

5. The apparatus according to claim 1 or 2, characterized in that, The light source assembly also includes one or more second light source assemblies. The second light source assembly includes a three-color laser light source and a movable guiding assembly, wherein the movable guiding assembly includes a third phase difference element, a second reflective element, and a third beam splitting element; The excitation light of each color emitted by the three-color laser source is converted into excitation light of each color including the second polarization state by the third phase difference element. Part of the excitation light of each color in the second polarization state is reflected by the third beam splitter, part is transmitted through the second reflector, and part is reflected by the third beam splitter and transmitted through the second reflector, and then guided to the first beam splitter.

6. The apparatus according to claim 1 or 2, characterized in that, The light source assembly further includes a third light source assembly, the light-emitting side of which is located on the side of the wavelength conversion assembly away from the first beam splitter. The wavelength conversion component is dynamically active, and a transmission region distributed along the circumference is provided on the wavelength conversion component. The third color excitation light generated by the third light source component, including the first polarization state, passes through the transmission region to reach the first beam splitter. The transmission region includes one or more of a light-transmitting region, a hole, and a diffusion region. The wavelength of the third color excitation light is the same as that of the first color excitation light, or the wavelength of the third color excitation light does not overlap or partially overlaps with the color wavelength corresponding to the fluorescence.

7. The apparatus according to claim 6, characterized in that, The third light source assembly includes a second color light source, which generates third-color excitation light including the first polarization state; or, The third light source assembly includes a second color laser source and a fourth phase difference element. The third color excitation light generated by the second color laser source is passed through the fourth phase difference element to obtain third color excitation light including the first polarization state.

8. The apparatus according to any one of claims 1 to 7, characterized in that, The first optical path of the first color excitation light generated by the first light source component, which is incident on the first beam splitter, and the second optical path of the light emitted from the first beam splitter via the wavelength conversion component do not overlap.

9. The apparatus according to claim 1 or 2, characterized in that, The wavelength conversion component is provided with wavelength conversion regions distributed along the circumferential direction. The fluorescence of the second polarization state is reflected to the wavelength conversion component by the first beam splitter and the second beam splitter, and is reflected by the wavelength conversion region to generate fluorescence including the first polarization state and the second polarization state.

10. The apparatus according to any one of claims 1 to 7, characterized in that, The light source device further includes one or more of the following: a dissipation element, a compound eye, at least one first shaping element, a second shaping element, and a light-uniforming element, wherein... The dissipation element is disposed between the first light source assembly and the first beam splitter; The compound eye is disposed between the first beam-splitting element and the dissipation element; The at least one first shaping element is disposed between the first beam splitter and the wavelength conversion component; The second shaping element and the homogenizing element are positioned in the emission direction of the first beam splitter emitting fluorescence with the first polarization state.

11. A light source device, characterized in that, The light source device includes a light source assembly, a first beam-splitting element, a first guiding assembly, and a wavelength conversion assembly, wherein, The light source assembly includes a fourth light source assembly, the first guiding assembly and the first beam splitting element are arranged along the optical path direction of the first color excitation light generated by the fourth light source assembly, and the wavelength conversion assembly is located in the transmission direction of the first color excitation light; the first guiding assembly includes a second beam splitting element; Wherein, the first color excitation light passes through the second beam splitter and is irradiated by the first beam splitter to the wavelength conversion component to generate fluorescence including a first polarization state and a second polarization state. The fluorescence of the first polarization state is emitted through the first beam splitter, and the fluorescence of the second polarization state is reflected by the first beam splitter and the second beam splitter to the wavelength conversion component to generate fluorescence including the first polarization state and the second polarization state. The first polarization state is different from the second polarization state.

12. The apparatus according to claim 11, characterized in that, The wavelength conversion component is provided with wavelength conversion regions distributed along the circumferential direction. The fluorescence of the second polarization state is reflected to the wavelength conversion component by the first beam splitter and the second beam splitter, and is reflected by the wavelength conversion region to generate fluorescence including the first polarization state and the second polarization state.

13. The apparatus according to claim 11 or 12, characterized in that, The second beam splitter is an arc-shaped beam splitter. The light-emitting side of the fourth light source assembly is located on the side of the arc-shaped beam splitter away from the outer surface of the first beam splitter. The first color excitation light is transmitted through the arc-shaped beam splitter to the first beam splitter, and then reflected by the first beam splitter to the wavelength conversion assembly.

14. The apparatus according to claim 13, characterized in that, The light source assembly further includes one or more fifth light source assemblies; The light-emitting side of the fifth light source component is located on the side of the outer surface of the first beam splitter away from the second beam splitter, and the fourth color excitation light including the second polarization state generated by the fifth light source component is reflected out by the first beam splitter. The first beam splitter combines the fluorescence of the first polarization state with the fourth color excitation light of the second polarization state for emission; the fourth color excitation light has the same wavelength as the first color excitation light, or the fourth color excitation light has a wavelength that does not overlap or partially overlaps with the color wavelength corresponding to the fluorescence.

15. The apparatus according to claim 11 or 12, characterized in that, The second beam splitter is a planar beam splitter, which includes a first part and a second part; wherein the first part and the second part are arranged in one of the following ways: The first part is the middle part of the planar beam splitter, and the second part is the surrounding part. The first part is the upper half of the planar beam splitter, and the second part is the lower half of the planar beam splitter excluding the upper half. The first part is a hole, or a dichroic element that transmits the first color excitation light and reflects fluorescence, or an element that transmits the first color excitation light; The second part is a reflector, or a dichroic element that transmits the first color excitation light and reflects fluorescence.

16. The apparatus according to any one of claims 11 to 15, characterized in that, The third optical path of the first color excitation light generated by the fourth light source component, which is incident on the first beam splitter, and the fourth optical path of the light emitted from the first beam splitter via the wavelength conversion component, do not overlap.

17. The apparatus according to any one of claims 11 to 15, characterized in that, The light source assembly further includes a sixth light source assembly, the light-emitting side of which is located on the side of the wavelength conversion assembly away from the first beam splitter. The wavelength conversion component is dynamically active, and a transmission region distributed along the circumference is provided on the wavelength conversion component. The fifth color excitation light generated by the sixth light source component, including the first polarization state or the second polarization state, passes through the transmission region to reach the first beam splitter. The transmission region includes one or more of the following: a light-transmitting region, a hole, and a diffusion region. The wavelength of the fifth color excitation light is the same as that of the first color excitation light, or the wavelength of the fifth color excitation light does not overlap or partially overlaps with the color wavelength corresponding to the fluorescence.

18. The apparatus according to claim 17, characterized in that, The sixth light source component includes a third color light source, which generates a fifth color excitation light including either the first polarization state or the second polarization state; or, The sixth light source component includes a third color laser light source, a fifth phase difference element, or a sixth phase difference element. The fifth color excitation light generated by the third color laser light source is passed through the fifth phase difference element to obtain a fifth color excitation light including the first polarization state, or the fifth color excitation light generated by the third color laser light source is passed through the sixth phase difference element to obtain a fifth color excitation light including the second polarization state.

19. The apparatus according to any one of claims 11 to 15, characterized in that, The wavelength conversion component further includes a phase difference region. The emitted light of the light source device includes a first timing sequence and a second timing sequence. Through the first timing sequence, the first color excitation light is emitted as fluorescence of the first polarization state through the wavelength conversion component and the first beam splitter. The fluorescence of the first polarization state includes fluorescence of the first polarization state excited by the wavelength conversion component and fluorescence of the first polarization state recovered by polarization. Through the second timing sequence, the first color excitation light undergoes polarization conversion via the phase difference region and is then emitted as the first color excitation light.

20. The apparatus according to any one of claims 11 to 15, characterized in that, The light source device further includes one or more of the following: a dissipation element, a compound eye, at least one first shaping element, a second shaping element, and a light-uniforming element, wherein... The dissipation element is disposed between the first light source assembly and the second beam-splitting element; The compound eye is disposed between the second beam-splitting element and the dissipation element; The first shaping element is disposed between the first beam splitting element and the wavelength conversion component; The second shaping element and the homogenizing element are positioned in the emission direction of the first beam splitter emitting fluorescence with the second polarization state or in the emission direction of the first beam splitter emitting fluorescence with the second polarization state.

21. The apparatus according to claim 11, characterized in that, The light source device further includes an illumination system, wherein the fluorescence having the second polarization state is emitted into the illumination system through the first beam splitter.

22. A projection device, characterized in that, The projection device includes the light source device according to any one of claims 1 to 10 or any one of claims 11 to 21.

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