Light source device and projection equipment

Abstract

The embodiment of the invention discloses a light source device, residual exciting light emitted by a wavelength conversion device can be re-emitted into the wavelength conversion device for re-excitation by using a first light energy recovery part, the excitation efficiency can be improved, and thus the lighting effect of projection equipment is improved. By means of the second light energy recovery part, part of stimulated light generated by the wavelength conversion device can be reflected to the wavelength conversion device, so that the part of stimulated light does not directly participate in follow-up light combination and is emitted again in the mode close to Lambert light emission at the wavelength conversion device, the light combination loss of fluorescent light is reduced, and the light combination efficiency is improved.

Description

Technical Field

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

[0002] In the field of projection technology, high brightness and wide color gamut have always been the goals to be pursued. However, due to the characteristics of the laser light source itself (such as linear polarization and small spot), speckle effect occurs in the projected image.

[0003] In order to solve the above problems, the related art uses blue light generated by a blue laser to excite the phosphor in the phosphor wheel to generate fluorescence, thereby improving the speckle. However, since some blue light remains in the excited fluorescence, the color point of the fluorescence is poor and the displayed color is not bright enough. Summary of the invention

[0004] An embodiment of the present application provides a light source device.

[0005] The technical solution of this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a light source device, the light source device comprising:

[0007] The light source assembly includes a first light source assembly for generating excitation light;

[0008] A wavelength conversion device, located on the optical path of the excitation light, for generating stimulated light under the excitation of the excitation light, wherein the stimulated light includes first stimulated light and second stimulated light;

[0009] A light energy recovery component is located between the first light source component and the wavelength conversion device, and the light energy recovery component includes a first light energy recovery component and a second light energy recovery component;

[0010] Wherein, the first light energy recovery element is located on the optical path of the residual excitation light emitted by the wavelength conversion device, and is used to reflect the residual excitation light to the wavelength conversion device to re-excite and generate the stimulated light;

[0011] Wherein, the second light energy recovery member is located on the optical path of the stimulated light emitted by the wavelength conversion device, and the second light energy recovery member includes a first functional unit and a second functional unit, the first functional unit is located on the optical path of the first stimulated light, and is used to reflect the first stimulated light to the wavelength conversion device and emit it again in the form of a Lambertian body; the second functional unit is located on the optical path of the second stimulated light, and is used to transmit the second stimulated light and the first stimulated light emitted again in the form of a Lambertian body;

[0012] a light combining component, used for combining the second stimulated light after being transmitted through the second functional unit and the first stimulated light re-emitted in the form of a Lambertian body to generate an emitted light;

[0013] Wherein, the light combining component comprises a light splitting and light combining element, and the light splitting and light combining element is located on the optical path where the excitation light is located, and the light splitting and light combining element transmits the excitation light and reflects the stimulated light.

[0014] In the above solution, the first light energy recovery component is arranged on the optical path of the excitation light, the light splitting and light combining element is located between the first light energy recovery component and the second light energy recovery component, and the first light energy recovery component, the light splitting and light combining element and the first functional unit of the second light energy recovery component satisfy one or more of the following conditions:

[0015] The light focus or intermediate image of the residual excitation light reflected by the first light energy recovery component is located between the light splitting and light combining element and the second light energy recovery component;

[0016] A light focus of the residual excitation light reflected by the first light energy recycling member is located at a second functional unit of the second light energy recycling member;

[0017] When the residual excitation light reflected by the first light energy recovery component enters the light splitting and light combining element, the incident angle formed between the incident light axis of the excitation light satisfies a first relational expression, wherein the first relational expression is:

[0018]

[0019] Among them, θ is the incident angle, D is the length of the second light energy recovery component, d is the distance between the incident point when the incident light enters the photosplitting and combining element and the second light energy recovery component, and n is the ratio of the diameter of the second light energy recovery component to the diameter of the second functional unit.

[0020] In the above scheme, the first light energy recovery member is arranged on the optical path of the excitation light, the first light energy recovery member includes a first area and a second area, the second area surrounds the periphery of the first area, the first area transmits the excitation light, and the second area reflects the residual excitation light;

[0021] The second functional unit surrounds the periphery of the first functional unit, or the second functional unit and the first functional unit are separated by a preset dividing line, and the area of ​​the light emitting surface of the first functional unit is smaller than the area of ​​the light emitting surface of the second functional unit;

[0022] The second light energy recovery element, or the first functional unit, transmits the excitation light.

[0023] In the above scheme, the first area of ​​the first light energy recovery component is a through hole, a diffuser or a light-transmitting sheet, the second area of ​​the first light energy recovery component is a polished metal material, a coated reflective sheet or a reflector, and / or the shape of the second area is an arc.

[0024] In the above scheme, the wavelength conversion device includes a wavelength conversion area and a laser dissipation area, and the wavelength conversion area and the laser dissipation area are located in the same annular shape or in different annular shapes of the wavelength conversion device;

[0025] The wavelength conversion region includes a wavelength conversion layer and a reflective layer, wherein the wavelength conversion layer is used to generate stimulated light under the excitation of the excitation light, and the reflective layer is used to reflect the stimulated light and residual excitation light in the wavelength conversion layer.

[0026] The laser dissipation zone includes a laser dissipation layer and a transmission layer, the laser dissipation layer is used to dissipate the excitation light, and the transmission layer is used to transmit the excitation light.

[0027] In the above scheme, the wavelength conversion zone includes one or more, the wavelength conversion zone and the laser dissipation zone are located in the same annular shape of the wavelength conversion device, and the wavelength conversion device moves periodically so that the one or more wavelength conversion zones and the laser dissipation zone are simultaneously and periodically located on the optical path where the excitation light is located;

[0028] The light combining component further comprises: a first light path deflecting element, a second light path deflecting element and a third light path deflecting element, wherein the first light path deflecting element is located on a side of the wavelength conversion device away from the light energy recovery component, the second light path deflecting element is located on an outgoing light path of the stimulated light emitted through the light splitting and light combining element, and the third light path deflecting element is located on a side of the wavelength conversion device away from the second light path deflecting element;

[0029] Among them, the light splitting and combining element, the first light path deflecting element, the second light path deflecting element, and the third light path deflecting element guide the second stimulated light after being transmitted through the second functional unit, the first stimulated light emitted again in the form of a Lambertian body, and the exciting light emitted through the laser dissipation zone to combine in the same direction to generate the output light.

[0030] In the above scheme, the wavelength conversion device further includes a filtering area and a reflecting area, and the filtering area is used to filter the wavelength of the stimulated light;

[0031] The wavelength conversion area, the reflection area, the laser dissipation area and the filter area are distributed in a circular ring shape along the radial direction of the substrate of the wavelength conversion device; the wavelength conversion area and the reflection area are located in a first circular ring shape, the laser dissipation area and the filter area are located in a second circular ring shape, and the second circular ring shape surrounds the first circular ring shape;

[0032] The color type and timing of the stimulated light filtered by the filtering area are the same as the color type and timing of the stimulated light generated by the wavelength conversion area, and the timing of the laser dissipation area is the same as that of the reflection area;

[0033] The light combining component further comprises: a fourth light path deflecting element, located on the light path of the stimulated light emitted through the light splitting and combining element and the excitation light reflected by the wavelength conversion device;

[0034] Among them, the light splitting and combining element and the fourth optical path deflecting element guide the second stimulated light after being transmitted through the second functional unit, the first stimulated light emitted again in the form of a Lambertian body, and the exciting light emitted through the reflection area, are processed by the corresponding filtering area and laser dissipation area of ​​the wavelength conversion device, and are combined in the same direction to generate the output light.

[0035] In the above scheme, the light splitting and combining element includes a third area and a fourth area, the fourth area surrounds the periphery of the third area, the third area transmits the excitation light, and the fourth area reflects the excitation light emitted through the laser dissipation area; or,

[0036] The incident light path of the excitation light generated by the first light source component does not overlap with the outgoing light path of the excitation light reflected by the reflection area of ​​the wavelength conversion device. The light combining component also includes a fifth light path deflecting element, which is located on the outgoing light path of the excitation light emitted through the reflection area. The light splitting and combining element is located between the fifth light path deflecting element and the second light energy recovery component.

[0037] In the above solution, the first light source assembly is used to generate excitation light of a first polarization state, and the second functional unit surrounds the periphery of the first functional unit;

[0038] The first light energy recycling element comprises a polarization conversion element and a polarization separation element, wherein the polarization conversion element is used to convert the polarization state of the excitation light; the polarization separation element transmits the light of the first polarization state and reflects the light of the second polarization state;

[0039] The polarization separation element is located between the first light source assembly and the polarization conversion element; or,

[0040] The polarization separation element is located on the optical path of the outgoing light, and the polarization conversion element is located between the light-splitting and light-combining element and the second light energy recovery element; the light-splitting and light-combining element transmits the light of the first polarization state and reflects the light of the second polarization state and the stimulated light.

[0041] In the above solution, the light combining component further includes one or more of the following elements: a light homogenizing element and a light modulating element; wherein the light homogenizing element and the light modulating element are located on the optical path where the outgoing light is located;

[0042] The light homogenization element is used to perform light homogenization processing on the output light;

[0043] The light modulation element is used to adjust the parameters of the emitted light, and the parameters include: one or more of the intensity, frequency, wavelength, phase and polarization state of the light.

[0044] In the above solution, the light source device further includes a shaping module for converging the light beam; the shaping module can be arranged at one or more of the following positions:

[0045] Disposed between the light homogenizing element and the light modulating element;

[0046] It is arranged between the light splitting and light combining element and the wavelength conversion device.

[0047] In the above solution, the light source assembly also includes a second light source assembly for generating supplementary light, wherein the supplementary light is used to combine with the second stimulated light transmitted through the second functional unit and the first stimulated light re-emitted in the form of a Lambertian body to generate output light.

[0048] In a second aspect, an embodiment of the present application provides a projection device, and the projection device includes the light source device described in any one of the first aspects above.

[0049] The embodiment of the present application provides a light source device and a projection device, including: a light source component, including a first light source component, for generating excitation light; a wavelength conversion device, located on the optical path where the excitation light is located, for generating stimulated light under the excitation of the excitation light, the stimulated light including first stimulated light and second stimulated light; a light energy recovery component, located between the first light source component and the wavelength conversion device, the light energy recovery component including a first light energy recovery component and a second light energy recovery component; wherein the first light energy recovery component is located on the optical path where the residual excitation light emitted by the wavelength conversion device is located, for reflecting the residual excitation light to the wavelength conversion device to re-stimulate the generation of stimulated light; wherein the second light energy recovery component is located between the stimulated light emitted by the wavelength conversion device. On the optical path where the second light energy recovery component is located, the second light energy recovery component includes a first functional unit and a second functional unit. The first functional unit is located on the optical path where the first stimulated light is located, and is used to reflect the first stimulated light to the wavelength conversion device and emit it again in the form of a Lambertian body; the second functional unit is located on the optical path where the second stimulated light is located, and is used to transmit the second stimulated light and the first stimulated light emitted again in the form of a Lambertian body; a light combining component is used to combine the second stimulated light transmitted through the second functional unit and the first stimulated light emitted again in the form of a Lambertian body to generate output light; wherein the light combining component includes a light splitting and light combining element, which is located on the optical path where the excitation light is located, and the light splitting and light combining element transmits the excitation light and reflects the stimulated light. In this way, the residual excitation light emitted by the wavelength conversion device can be re-injected into the wavelength conversion device for re-excitation by using the first light energy recovery component, which can improve the excitation efficiency, thereby improving the light efficiency of the projection device. The second light energy recovery component can be used to reflect part of the stimulated light generated by the wavelength conversion device to the wavelength conversion device, so that it will not directly participate in the subsequent light combination, but will be emitted again at the wavelength conversion device in a form close to Lambertian light, thereby reducing the light combination loss of fluorescence and improving the light combination efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 1 ;

[0051] Figure 2 A schematic diagram of an optional incident angle provided in an embodiment of the present application;

[0052] Figure 3 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 2 ;

[0053] Figure 4 A schematic diagram of the structure of an optional wavelength conversion device provided in an embodiment of the present application;

[0054] Figure 5 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 3 ;

[0055] Figure 6 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 4 ;

[0056] Figure 7 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 5 ;

[0057] Figure 8 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 6 ;

[0058] Fig. 9 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 7 ;

[0059] Fig.10 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 8 ;

[0060] Fig.11 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 9 ;

[0061] Fig.12 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 10 ;

[0062] Fig.13 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 10 one;

[0063] Fig.14 A schematic diagram of an optional light source device provided in an embodiment of the present application Figure 10 two;

[0064] Fig.15 A schematic diagram of the structure of an optional projection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0066] The terms "first", "second", etc. in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions.

[0067] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0068] The present application embodiment provides a light source device, see Figure 1 , Figure 1 FIG. 1 is a schematic diagram of a light source device. The light source device 100 includes:

[0069] The light source assembly 1 (not shown in the figure) comprises a first light source assembly 11 for generating excitation light;

[0070] The wavelength conversion device 2 is located on the optical path of the excitation light and is used to generate stimulated light under the excitation of the excitation light, and the stimulated light includes the first stimulated light and the second stimulated light;

[0071] The light energy recovery component 3 (not shown in the figure) is located between the first light source component 11 and the wavelength conversion device 2, and the light energy recovery component 3 includes a first light energy recovery component 31 and a second light energy recovery component 32;

[0072] The first light energy recovery element 31 is located on the optical path of the residual excitation light emitted by the wavelength conversion device 2, and is used to reflect the residual excitation light to the wavelength conversion device 2 to re-excite and generate stimulated light;

[0073] Wherein, the second light energy recovery member 32 is located on the optical path of the stimulated light emitted by the wavelength conversion device 2, and the second light energy recovery member 32 includes a first functional unit 321 and a second functional unit 322. The first functional unit 321 is located on the optical path of the first stimulated light, and is used to reflect the first stimulated light to the wavelength conversion device 2 and emit it again in the form of a Lambertian body; the second functional unit 322 is located on the optical path of the second stimulated light, and is used to transmit the second stimulated light and the first stimulated light emitted again in the form of a Lambertian body;

[0074] A light combining component 4 (not shown in the figure), used for combining the second stimulated light transmitted through the second functional unit 322 and the first stimulated light emitted again in the form of a Lambertian body to generate an emitted light;

[0075] The light combining component 4 includes a light splitting and light combining element 41, which is located on the optical path of the excitation light. The light splitting and light combining element 41 transmits the excitation light and reflects the stimulated light.

[0076] In an embodiment of the present application, the light source assembly is used to emit narrow-spectrum light, which at least includes one or more lasers with partially overlapping and / or non-overlapping wavelength ranges, such as a blue laser, a red laser or a green laser, wherein the blue laser is also called blue laser, blue excitation light, blue light and excitation light.

[0077] In an embodiment of the present application, the light source assembly may include a first light source assembly, which may be an excitation light source for generating excitation light such as blue (blue, B) excitation light, and the excitation light may excite the phosphor layer to generate stimulated light (also known as fluorescence). Here, the excitation light source may be one or more of a monochromatic laser light source, an LED light source, a monochromatic LED light source, a laser diode (Laserdiode, LD) light source, an ultraviolet (Ultraviolet, UV) light source, and other novel light sources. The number of light-emitting chips in the excitation light source may be a single light-emitting chip or an array of light-emitting chips, and the present application does not impose specific restrictions on this. For example, the excitation light source may be a blue laser LD, and the wavelength of the blue laser may be between 430 nanometers (nanometer, nm) and 480 nm, or the main wavelength of the blue laser is 455 nm, and the present application does not impose specific restrictions on the wavelength range of the blue laser. For another example, the excitation light source is a blue LED, and the excitation light is a blue LED light.

[0078] In the embodiment of the present application, the wavelength conversion device is located on the optical path where the excitation light is located, and is used to generate stimulated light under the excitation of the excitation light, wherein the stimulated light may include first stimulated light and second stimulated light. In one example, the wavelength conversion device may be a wavelength conversion sheet, and the wavelength conversion sheet may be a static fluorescent sheet (such as a yellow, green, orange, red, or orange fluorescent sheet), and the blue LED light emitted by the first light source component, such as a blue LED, is used as the excitation light to stimulate the wavelength conversion sheet.

[0079] In the embodiment of the present application, the light energy recovery component may include a first light energy recovery component and a second light energy recovery component.

[0080] Among them, the first light energy recovery component is located on the optical path of the residual excitation light emitted by the wavelength conversion device (i.e., the excitation light that does not participate in the excitation of the stimulated light), and is used to reflect the residual excitation light to the wavelength conversion device to re-stimulate the generation of stimulated light. In this way, by collecting and reflecting the residual excitation light that is not fully utilized to the wavelength conversion device, it can continue to stimulate the generation of stimulated light in the system to improve the utilization rate of light energy; and / or, the first light energy recovery component is located on the optical path of the excitation light emitted by the first light source component, and is used to transmit the excitation light. Of course, the first light energy recovery component can also reflect the residual excitation light; that is, the first light energy recovery component has at least an area that can transmit the excitation light, and an area that can reflect the residual excitation light. It should be noted that the optical axis of the residual excitation light emitted by the wavelength conversion device and the optical axis of the excitation light emitted by the first light source component may coincide (coaxial) or may not coincide (non-coaxial). Therefore, the embodiment of the present application reflects the excitation light that does not participate in the excitation in the wavelength conversion device back to the wavelength conversion device through the first light energy recovery component, so that it will not participate in the subsequent light combination, avoiding the poor color point of the fluorescence due to the presence of residual blue light. Instead, it is re-excited at the wavelength conversion device to produce stimulated light, thereby improving the overall light energy conversion efficiency.

[0081] Among them, the second light energy recovery component is located on the optical path where the stimulated light is located, and the second light energy recovery component includes a first functional unit and a second functional unit. The first functional unit and the second functional unit can be divided and arranged by a dividing line and are not surrounded, that is, the first functional unit and the second functional unit are in a relatively independent and parallel state in the layout. Of course, the second functional unit can also surround the periphery of the first functional unit, that is, the first functional unit is in the center of the first light energy recovery component, a position relative to the core or a middle position. Of course, the second light energy recovery component can also be located on the optical path where the excitation light is located, and it is used to transmit the excitation light.

[0082] Here, the first functional unit is located on the optical path where the first stimulated light is located, and is used to reflect the first stimulated light to the wavelength conversion device and re-emit it in the form of a Lambertian body. In this way, by collecting and reflecting part of the stimulated light to the wavelength conversion device, it can continue to propagate in the system in the form of a Lambertian body to improve the utilization rate of light energy; and / or, the first functional unit can also be located on the optical path where the excitation light is located, and is used to transmit the excitation light.

[0083] Here, the second functional unit is located on the optical path where the second stimulated light is located, and is used to transmit the second stimulated light and the first stimulated light re-emitted in the form of a Lambertian body. Therefore, the embodiment of the present application reflects part of the stimulated light (i.e., the first stimulated light) back to the wavelength conversion device through the second light energy recovery component, so that it will not directly participate in the subsequent light combination, but will be re-emitted at the wavelength conversion device in a form close to Lambertian light, so that at least part of the first stimulated light re-emitted through the wavelength conversion device can reach the light splitting and light combining element, thereby reducing the light combination loss of the stimulated light and improving the light combination efficiency of the light source device.

[0084] In the embodiment of the present application, the light combining component can guide the second stimulated light transmitted through the second functional unit and the first stimulated light emitted again in the form of a Lambertian body to combine to generate emitted light.

[0085] In the embodiment of the present application, the light combining component may include a light splitting and light combining element, which is located on the optical path of the excitation light emitted by the first light source component. Here, the light splitting and light combining element may be located between the first light energy recovery component and the second light energy recovery component, and the light splitting and light combining element may transmit the excitation light and reflect the stimulated light. The light splitting and light combining element may also be located between the first light source component and the second light energy recovery component, and the light splitting and light combining element may transmit the excitation light of the first polarization state and reflect the excitation light and the stimulated light of the second polarization state. This application does not impose any specific restrictions on this.

[0086] In one implementable manner, the excitation light generated by the first light source assembly is transmitted through the first light energy recovery element, the light splitting and combining element, and the second light energy recovery element to enter the wavelength conversion device. The wavelength conversion device absorbs the excitation light and emits stimulated light and residual excitation light. The stimulated light includes the first stimulated light and the second stimulated light.

[0087] Among them, the residual excitation light is transmitted through the first functional unit of the second light energy recovery component, the light-splitting and light-combining element, and reflected by the first light energy recovery component, and then transmitted through the light-splitting and light-combining element and the second light energy recovery component again, and is incident on the wavelength conversion device to re-excite and generate stimulated light.

[0088] Among them, the first stimulated light is reflected by the first functional unit of the second light energy recovery component, and is re-emitted to the wavelength conversion device and reflected, so that the first stimulated light is emitted again in the form of a Lambertian body; the first stimulated light and the second stimulated light emitted again in the form of a Lambertian body are transmitted through the second functional unit of the second light energy recovery component and reflected by the photosplitting and combining element.

[0089] An embodiment of the present application provides a light source device, comprising: a light source component, comprising a first light source component, for generating excitation light; a wavelength conversion device, located on the optical path where the excitation light is located, for generating stimulated light under the excitation of the excitation light, the stimulated light comprising a first stimulated light and a second stimulated light; a light energy recovery component, located between the first light source component and the wavelength conversion device, the light energy recovery component comprising a first light energy recovery component and a second light energy recovery component; wherein the first light energy recovery component is located on the optical path where the residual excitation light emitted by the wavelength conversion device is located, for reflecting the residual excitation light to the wavelength conversion device to re-stimulate the generation of stimulated light; wherein the second light energy recovery component is located on the optical path where the stimulated light emitted by the wavelength conversion device is located. The second light energy recovery component includes a first functional unit and a second functional unit. The first functional unit is located on the light path where the first stimulated light is located, and is used to reflect the first stimulated light to the wavelength conversion device and emit it again in the form of a Lambertian body; the second functional unit is located on the light path where the second stimulated light is located, and is used to transmit the second stimulated light and the first stimulated light emitted again in the form of a Lambertian body; a light combining component is used to combine the second stimulated light transmitted through the second functional unit and the first stimulated light emitted again in the form of a Lambertian body to generate output light; wherein the light combining component includes a light splitting and light combining element, which is located on the light path where the excitation light is located, and the light splitting and light combining element transmits the excitation light and reflects the stimulated light. In this way, the residual excitation light emitted by the wavelength conversion device can be re-injected into the wavelength conversion device for re-excitation by using the first light energy recovery component, which can improve the excitation efficiency, thereby improving the light efficiency of the projection device. The second light energy recovery component can be used to reflect part of the stimulated light generated by the wavelength conversion device to the wavelength conversion device, so that it will not directly participate in the subsequent light combination, but will be emitted again at the wavelength conversion device in a form close to Lambertian light, thereby reducing the light combination loss of fluorescence and improving the light combination efficiency.

[0090] In some embodiments, continue to refer to Figure 1 The first light energy recovery component 31 is arranged on the optical path of the excitation light, the light splitting and light combining element 41 is located between the first light energy recovery component 31 and the second light energy recovery component 32, and one or more of the following are satisfied between the first light energy recovery component 31, the light splitting and light combining element 41 and the first functional unit 321 of the second light energy recovery component 32:

[0091] The light focus or intermediate image of the residual excitation light reflected by the first light energy recovery member 31 is located between the light splitting and light combining element 41 and the second light energy recovery member 32;

[0092] The focus of the residual excitation light reflected by the first light energy recycling member 31 is located at the second functional unit 322 of the second light energy recycling member 32;

[0093] When the residual excitation light reflected by the first light energy recovery element 31 enters the light splitting and light combining element 41, the incident angle formed between the incident light axis of the excitation light satisfies the first relational expression, wherein the first relational expression is:

[0094]

[0095] Among them, θ is the incident angle, D is the length of the second light energy recovery component, d is the distance between the incident point when the incident light enters the photosplitting and combining element and the second light energy recovery component, and n is the ratio of the diameter of the second light energy recovery component to the diameter of the second functional unit.

[0096] In the embodiment of the present application, the first light energy recovery component can be located on the light path of the excitation light emitted by the first light source assembly, and the first light energy recovery component can transmit the excitation light.

[0097] In the embodiment of the present application, the light-splitting and light-combining element can be located between the first light energy recovery component and the second light energy recovery component, and the light-splitting and light-combining element can transmit the excitation light and reflect the stimulated light.

[0098] In the embodiment of the present application, the focus of the residual excitation light can be understood as the residual excitation light converging or diverging after being reflected by the first light energy recovery component. When the light converges at one point, the focus of the light is obtained. It should be noted that the focus of the light is a specific position of the residual excitation light in space, where all the light converging to this point intersects.

[0099] In the embodiment of the present application, the intermediate image of the residual excitation light can be understood as an image formed at a certain position in the light source device or system after the residual excitation light is reflected by the first light energy recovery component. It should be noted that the image is not the final image on the imaging plane, but a transitional image inside the optical system, which is called an intermediate image. The intermediate image is a stage imaging result in the process of light propagation, which may be further processed by subsequent optical elements.

[0100] In the embodiment of the present application, the light focus or intermediate image of the residual excitation light reflected by the first light energy recovery component is located between the light-splitting and light-combining element and the second light energy recovery component, and / or the light focus of the residual excitation light reflected by the first light energy recovery component is located in the second functional unit of the second light energy recovery component. In this way, by reasonably setting the positions and mutual relationships of the first light energy recovery component, the light-splitting and light-combining element and the second light energy recovery component, the residual excitation light reflected by the first light energy recovery component forms a specific convergence point (light focus) and / or a transition image (intermediate image) in space, and the position of the convergence point or the transition image is in the spatial area between the light-splitting and light-combining element and the second light energy recovery component, or the second functional unit of the second light energy recovery component. This is conducive to guiding the residual excitation light into the subsequent optical path, avoiding the waste of light energy, and thus improving the light energy utilization rate of the entire optical system.

[0101] In the present application, refer to Figure 2 As shown, the incident angle formed between the incident light when the residual excitation light reflected by the first light energy recovery component enters the photosplitting and light combining element and the incident light axis of the excitation light satisfies the first relationship. In this way, the incident angle relationship between the incident light when the residual excitation light enters the photosplitting and light combining element and the incident light axis of the excitation light helps to control the propagation direction and angle of the light, reduce the scattering and reflection loss of the light, and optimize the imaging quality or optical signal transmission performance of the optical system. By precisely controlling the incident angle, the light can be more accurately focused or propagated to the desired position, improving the stability and reliability of the system; at the same time, the installation position and angle of each optical element can be accurately determined to reduce the uncertainty in the design process. During the debugging stage, the system can also be adjusted and optimized based on these relationships to improve the performance and consistency of the system.

[0102] From the above, it can be seen that by satisfying one or more of the above conditions between the first light energy recovery component, the light splitting and combining component, and the first functional unit of the second light energy recovery component, the optical system can have better adaptability in different application scenarios. For example, in applications that require high energy density, the residual excitation light can be more concentratedly focused on a specific area by adjusting the position and angle of the components; in applications that have strict requirements on the direction of light propagation, the control of the incident angle can be used to ensure that the light propagates along the expected path; further, reasonable optical component settings and light management strategies can reduce the cost and complexity of the optical system to a certain extent. By improving the utilization rate of light energy, the demand for light source power may be reduced, thereby reducing the cost and energy consumption of the light source.

[0103] In some embodiments, reference Figure 3As shown, the first light energy recycling member 31 is arranged on the optical path of the excitation light, and the first light energy recycling member 31 includes a first area 311 and a second area 312, the second area 312 surrounds the periphery of the first area 311, the first area 311 transmits the excitation light, and the second area 312 reflects the residual excitation light;

[0104] The second functional unit 321 surrounds the periphery of the first functional unit 322, or the second functional unit 322 and the first functional unit 321 are separated by a preset dividing line, and the area of ​​the light emitting surface of the first functional unit 321 is smaller than the area of ​​the light emitting surface of the second functional unit 322;

[0105] The second light energy recovery element 32, or the first functional unit 321, transmits the excitation light.

[0106] In the embodiment of the present application, the first light energy recovery component is arranged on the optical path of the excitation light, and the first light energy recovery component can be arranged between the first light source component and the light splitting and combining element. The first light energy recovery component includes a first area and a second area, and the second area surrounds the periphery of the first area, wherein the first area can be used to transmit the excitation light, and the second area can be used to reflect the residual excitation light.

[0107] In the embodiment of the present application, the second light energy recovery component includes a first functional unit and a second functional unit, and the second functional unit surrounds the periphery of the first functional unit, or the second functional unit and the first functional unit are separated by a preset dividing line, so that at least part of the stimulated light can be transmitted and / or reflected by different functional units. It should be noted that the wavelength conversion device can reflect the excitation light, and the incident light path of the excitation light and the outgoing light path of the excitation light reflected by the wavelength conversion device or the residual excitation light can coincide (coaxial) or not coincide (non-coaxial). If the incident light path of the excitation light coincides with the outgoing light path of the excitation light reflected by the wavelength conversion device or the residual excitation light, the second functional unit surrounds the periphery of the first functional unit; if the incident light path of the excitation light does not coincide with the outgoing light path of the excitation light reflected by the wavelength conversion device or the residual excitation light, the second functional unit and the first functional unit are separated by a preset dividing line. Therefore, the spatial position setting of the first functional unit and the second functional unit is associated with the positional relationship between the incident light path of the excitation light and the outgoing light path of the excitation light reflected by the wavelength conversion device or the residual excitation light.

[0108] In the embodiment of the present application, the second light energy recovery component transmits the excitation light. The entire second light energy recovery component may transmit the excitation light. Of course, the first functional unit in the second light energy recovery component may also transmit the excitation light. That is, the first functional unit is located on the optical path where the excitation light is located. In this way, it is determined that the excitation light can reach the wavelength conversion device to generate fluorescence.

[0109] In the embodiment of the present application, the first functional unit can reflect the stimulated light, and the second functional unit can transmit the stimulated light. Among them, since the light in the central part of the stimulated light is relatively concentrated and less than the light in other parts of the stimulated light, at this time, the area of ​​the light-emitting surface of the first functional unit can be smaller than the area of ​​the light-emitting surface of the second functional unit, that is, the proportion of the stimulated light reflected by the first functional unit and re-emitted in the form of a Lambertian body is smaller than the proportion of the stimulated light transmitted by the second functional unit in the original form.

[0110] It can be understood that the diversity of the light angles of the central part of the stimulated light is low. The central part of the stimulated light passes through the first functional unit and is folded back once in the wavelength conversion device and re-emitted in the form of a Lambertian body, which can increase the diversity of the light angles and is more conducive to the reflection of the light splitting and light combining element, thereby reducing the light combining loss. In addition, the central energy of the stimulated light is relatively concentrated, and passes through the first functional unit and is folded back once in the wavelength conversion device, which is conducive to energy homogenization and uniform brightness.

[0111] In one embodiment of the present application, the first light energy recovery component is arranged on the optical path of the excitation light, the light splitting and light combining element is located between the first light energy recovery component and the second light energy recovery component, the incident light path of the excitation light coincides with the outgoing light path of the excitation light reflected by the wavelength conversion device or the residual excitation light, and the second functional unit can surround the periphery of the first functional unit, such as Figure 3 In another case, the first light energy recycling component is arranged on the optical path of the excitation light, the light splitting and light combining element is located between the first light energy recycling component and the second light energy recycling component, the incident optical path of the excitation light does not overlap with the outgoing optical path of the excitation light reflected by the wavelength conversion device or the residual excitation light, and the second functional unit and the first functional unit can be separated by a preset dividing line, such as Figure 3 As shown in the right figure.

[0112] In one possible scenario, Figure 3 Taking the left picture in the figure as an example, the excitation light generated by the first light source component is transmitted through the first area of ​​the first light energy recovery element, the photosplitting and combining element, and the second light energy recovery element (or the first functional unit) and is incident on the wavelength conversion device. The wavelength conversion device absorbs the excitation light and emits stimulated light and residual excitation light. The stimulated light includes the first stimulated light and the second stimulated light.

[0113] Among them, the residual excitation light is transmitted through the second light energy recovery component (or the first functional unit), the light-splitting and light-combining element, and reflected by the second area of ​​the first light energy recovery component, and then transmitted through the light-splitting and light-combining element and the second light energy recovery component (or the first functional unit) again, and is incident on the wavelength conversion device to re-excite and generate stimulated light.

[0114] Among them, the first stimulated light is reflected by the first functional unit of the second light energy recovery component, and is re-emitted to the wavelength conversion device and reflected, so that the first stimulated light is emitted again in the form of a Lambertian body; the first stimulated light and the second stimulated light emitted again in the form of a Lambertian body are transmitted through the second functional unit of the second light energy recovery component and reflected by the photosplitting and combining element.

[0115] In some embodiments, continue to refer to Figure 3 The first area 311 of the first light energy recovery element 31 is a through hole, a diffuser or a light-transmitting sheet, the second area 312 of the first light energy recovery element 31 is a polished metal material, a coated reflective sheet or a reflector, and / or the second area 312 is in an arc shape.

[0116] In an embodiment of the present application, the first area of ​​the first light energy recovery element may be a transmissive area, and the second area of ​​the first light energy recovery element may be a reflective area, wherein the first area may be a through hole, a diffuser or a light-transmitting sheet, and the second area may be a polished metal material or a coated reflective element such as a coated reflective sheet.

[0117] In the embodiment of the present application, the size of the first area of ​​the first light energy recycling member can be set based on actual experience to allow the excitation light generated by the first light source assembly to pass through. The shape of the second area can be arc-shaped, so that the second area with curvature utilizes the reflection and focusing of the residual excitation light, thereby improving the excitation efficiency and thus improving the utilization rate of the light source.

[0118] In the embodiment of the present application, the excitation light is diffused after being reflected by the wavelength conversion device, and the light spot becomes larger, that is, the light spot of the residual excitation light becomes larger; when the residual excitation light is irradiated to the first light energy recovery component, the residual excitation light of the first area of ​​the first light energy recovery component is lost, and the residual excitation light reflected and focused by the second areas on both sides of the first area of ​​the first light energy recovery component is irradiated to the wavelength conversion device again to re-excite and generate stimulated light, thereby improving the excitation efficiency and thereby improving the utilization rate of the light source.

[0119] In some embodiments, the wavelength conversion device includes a wavelength conversion region and a laser dissipation region, and the wavelength conversion region and the laser dissipation region are located in the same annular shape or in different annular shapes of the wavelength conversion device;

[0120] The wavelength conversion region includes a wavelength conversion layer and a reflection layer. The wavelength conversion layer is used to generate stimulated light under the excitation of the excitation light, and the reflection layer is used to reflect the stimulated light and the residual excitation light in the wavelength conversion layer.

[0121] The laser dissipation zone includes a laser dissipation layer and a transmission layer. The laser dissipation layer is used to dissipate the excitation light, and the transmission layer is used to transmit the excitation light.

[0122] In an embodiment of the present application, the wavelength conversion device may include a wavelength conversion zone, the wavelength conversion zone includes a wavelength conversion layer and a reflective layer, the wavelength conversion layer contains a wavelength conversion material, and can generate stimulated light under the excitation of excitation light. The reflective layer can be a reflective sheet, or a metal substrate, a thermally conductive reflective substrate, etc. This application does not make any specific restrictions on this, and can reflect the stimulated light and the residual excitation light in the wavelength conversion layer that does not participate in the excitation.

[0123] The wavelength conversion material may be a phosphor or a phosphor powder. For example, the wavelength conversion material may include a yellow phosphor that is excited to emit yellow light, such as a yttrium aluminum garnet (YAG) system phosphor containing cerium (Ce) as an activator, or may be a green phosphor powder, a red phosphor powder, a yellow phosphor powder, an orange phosphor powder, a tangerine phosphor powder, a cyan phosphor powder, etc. This application does not impose any specific restrictions on this.

[0124] In an embodiment of the present application, the wavelength conversion device may further include a laser dissipation zone, and the laser diffusion zone includes a laser dissipation layer, and the laser dissipation layer has a diffusion or scattering material, which can diffuse or scatter the excitation light. It should be noted that the excitation light that has been diffused or scattered can be transmitted through the laser dissipation zone. Of course, the laser diffusion zone may also include a transmission layer, and the transmission layer may have a transmission material, and the transmission layer can transmit the excitation light. After the excitation light is diffused or scattered by the laser dissipation zone, it is transmitted through the transmission layer of the laser dissipation zone. This application does not make any specific restrictions on this.

[0125] In the embodiment of the present application, the wavelength conversion device may include a wavelength conversion area and a laser dissipation area. The wavelength conversion area and the laser dissipation area may be respectively located in different areas of the same annular shape of the wavelength conversion device; for example, Figure 4 As shown in the left figure of , the wavelength conversion regions R, G and the laser dissipation region (D-diffuse, D) are respectively located in different regions of the same annular shape of the wavelength conversion device. Of course, the wavelength conversion region and the laser dissipation region can also be distributed in an annular shape along the radial direction of the substrate of the wavelength conversion device; for example, Figure 4 As shown in the right figure in , the wavelength conversion zones R and G can be located in the partial area inside the circular ring of the substrate of the wavelength conversion device, and the laser dissipation zone D can be located in the partial area outside the circular ring of the substrate of the wavelength conversion device. In this way, the wavelength conversion zone can continuously process the excitation light, and the laser dissipation zone can continuously process the excitation light or supplementary light; further, the laser dissipation zone is located outside the circular ring, which can better dissipate the excess heat carried by the excitation light that is not absorbed by the wavelength conversion zone, thereby reducing the heat load of the wavelength conversion zone and improving the thermal stability of the system.

[0126] In some embodiments, reference Figure 5As shown, the wavelength conversion area includes one or more, the wavelength conversion area and the laser dissipation area are located in the same annular shape of the wavelength conversion device, and the wavelength conversion device moves periodically so that the one or more wavelength conversion areas and the laser dissipation area are periodically located on the optical path where the excitation light is located;

[0127] The light combining component 4 (not shown in the figure) further includes: a first light path deflecting element 42, a second light path deflecting element 43 and a third light path deflecting element 44, wherein the first light path deflecting element 42 is located on a side of the wavelength conversion device 2 away from the light energy recovery component, the second light path deflecting element 43 is located on an outgoing light path of the stimulated light emitted through the light splitting and light combining element 41, and the third light path deflecting element 44 is located on a side of the wavelength conversion device 2 away from the second light path deflecting element 43;

[0128] Among them, the light splitting and combining element 41, the first light path deflecting element 42, the second light path deflecting element 43, and the third light path deflecting element 44 guide the second stimulated light transmitted through the second functional unit 322, the first stimulated light emitted again in the form of a Lambertian body, and the exciting light emitted through the laser dissipation zone to be combined in the same direction to generate output light.

[0129] In an embodiment of the present application, the wavelength conversion zone includes one or more, each wavelength conversion zone corresponds to a wavelength conversion material, and can generate at least one color light with a wavelength band different from the wavelength band of the excitation light, namely, stimulated light; wherein the stimulated light can be at least one of yellow fluorescence, red fluorescence, green fluorescence, orange fluorescence, orange fluorescence, and cyan fluorescence.

[0130] For example, continue to refer to Figure 4 As shown, the wavelength conversion area includes two first wavelength conversion areas (such as G area) and two second wavelength conversion areas (such as R area); wherein the wavelength conversion layer of the first wavelength conversion area (G area) is a mixture of green or cyan phosphor and organic glue, which is excited to produce green or cyan fluorescence; the green phosphor is aluminate, silicate or β-sialon green phosphor, and the organic glue is high-temperature silica gel or epoxy glue. The wavelength conversion layer of the second wavelength conversion area (R area) is a mixture of yellow or orange or red phosphor and organic glue, which is excited to produce yellow or red or orange or yellow fluorescence; the red phosphor is nitride, silicate or α-sialon red phosphor, the orange phosphor is a mixture of yellow phosphor and red phosphor, or silicate orange phosphor, and the organic glue is high-temperature silica gel or epoxy glue.

[0131] In the embodiment of the present application, during the periodic movement of the wavelength conversion device, if multiple wavelength conversion zones and laser dissipation zones are located in the same circular ring of the wavelength conversion device, the multiple wavelength conversion zones and laser dissipation zones can be located on the optical path of the excitation light periodically or in a time sequence, so that different wavelength conversion zones and laser dissipation zones can work simultaneously, dispersing the effect of the excitation light on a single wavelength conversion zone, reducing heat accumulation, and extending the service life of the light source; at the same time, the excitation light can also be diffused / scattered to reduce the speckle problem caused by the coherence of the excitation light.

[0132] In the embodiment of the present application, the light combining assembly further includes: a first light path deflecting element, a second light path deflecting element and a third light path deflecting element.

[0133] Among them, the first optical path deflecting element is located on the side of the wavelength conversion device away from the light energy recovery component, and the first optical path deflecting element can reflect light; exemplarily, the first optical path deflecting element reflects the excitation light transmitted through the wavelength conversion device, and the first optical path deflecting element can be a reflective element, such as a reflector.

[0134] Wherein, the second light path deflecting element is located on the light path of the stimulated light emitted by the light splitting and light combining element, and the second light path deflecting element can transmit (or reflect) the stimulated light, and reflect (or transmit) the excitation light. Exemplarily, the second light path deflecting element transmits (or reflects) the stimulated light emitted by the light splitting and light combining element, and reflects (or transmits) the excitation light emitted by the third light path deflecting element, and the second light path deflecting element can be a dichroic mirror element.

[0135] The third optical path deflecting element is located on a side of the wavelength conversion device away from the second optical path deflecting element; the third optical path deflecting element can reflect light; illustratively, the third optical path deflecting element reflects the excitation light emitted by the first optical path deflecting element, and the third optical path deflecting element can be a reflective element, such as a reflector,

[0136] It should be noted that since the light path deflecting element is used to change the transmission direction of light to make it converge or diverge, the light path deflecting element can be tilted so that the reflected laser irradiates along the preset light path direction. The light path deflecting element can be a curved reflector or a plane reflector.

[0137] In one possible scenario, refer to Figure 4 The left picture and Figure 5 As shown, the excitation light generated by the first light source assembly is transmitted through the first area of ​​the first light energy recovery element, the light-splitting and light-combining element, and the second light energy recovery element (or the first functional unit), and is incident on the wavelength conversion zone and the laser dissipation zone of the wavelength conversion device in a time-sharing manner. The wavelength conversion zone absorbs the excitation light and emits stimulated light and residual excitation light. The stimulated light includes the first stimulated light and the second stimulated light. The laser dissipation zone diffuses or scatters the excitation light.

[0138] Among them, the excitation light transmitted through the laser dissipation zone of the wavelength conversion device is reflected by the first optical path deflection element, reflected by the second optical path deflection element, transmitted through the laser dissipation zone of the wavelength conversion device again, and reflected (or transmitted) by the third optical path deflection element.

[0139] Among them, the residual excitation light is transmitted through the second light energy recovery component (or the first functional unit), the light-splitting and light-combining element, and reflected by the second area of ​​the first light energy recovery component, and then transmitted through the light-splitting and light-combining element and the second light energy recovery component (or the first functional unit) again, and is incident on the wavelength conversion area of ​​the wavelength conversion device to re-excite and generate stimulated light.

[0140] Among them, the first stimulated light is reflected by the first functional unit of the second light energy recovery component, and is re-emitted back to the wavelength conversion device and reflected, so that the first stimulated light is emitted again in the form of a Lambertian body; the first stimulated light and the second stimulated light emitted again in the form of a Lambertian body are transmitted through the second functional unit of the second light energy recovery component, reflected by the light splitting and light combining element, and transmitted (or reflected) by the second light path deflection element, and are combined with the excitation light in the same direction to generate the output light for emission. In this way, part of the fluorescence can be reflected back to the wavelength conversion device through the light energy recovery component, so that it will not directly participate in the subsequent light combination, but will be emitted again at the wavelength conversion device in a form close to Lambertian light, thereby reducing the light combination loss of the fluorescence and improving the light combination efficiency. The light energy recovery component can re-inject the residual excitation light into the wavelength conversion device for re-excitation, which can improve the excitation efficiency and thus improve the light efficiency of the projection equipment.

[0141] In some embodiments, reference Figure 6 As shown, the wavelength conversion device further includes a filtering area and a reflecting area, and the filtering area is used to filter the wavelength of the stimulated light;

[0142] The wavelength conversion area, the reflection area, the laser dissipation area and the filtering area are distributed in a circular ring shape along the radial direction of the substrate of the wavelength conversion device; the wavelength conversion area and the reflection area are located in a first circular ring shape, the laser dissipation area and the filtering area are located in a second circular ring shape, and the second circular ring shape surrounds the first circular ring shape;

[0143] The color type and timing of the stimulated light filtered by the filtering area are the same as the color type and timing of the stimulated light generated by the wavelength conversion area, and the timing of the laser dissipation area is the same as that of the reflection area;

[0144] The light combining component 4 (not shown in the figure) further includes: a fourth light path deflecting element 45, which is located on the light path of the stimulated light emitted by the light splitting and combining element 41 and the excitation light reflected by the wavelength conversion device 2;

[0145] Among them, the light splitting and combining element 41 and the fourth light path deflection element 45 guide the second stimulated light after being transmitted through the second functional unit 322, the first stimulated light emitted again in the form of a Lambertian body, and the excitation light emitted through the reflection area, and are processed by the corresponding filtering area and laser dissipation area of ​​the wavelength conversion device 2, and are combined in the same direction to generate output light.

[0146] In an embodiment of the present application, the wavelength conversion device may further include a filter area, which has a filter material. The filter area is used to filter stimulated light of different colors or wavelengths. When the filter area is set in the wavelength conversion device, it represents that the wavelength conversion device and the filter element are set as an integrated unit.

[0147] In the embodiment of the present application, the wavelength conversion area and the filter area in the wavelength conversion device are distributed in an annular shape along the radial direction of the substrate of the wavelength conversion device, and the wavelength conversion area and the corresponding filter area are respectively located in different annular shapes; the wavelength conversion area is located in the area of ​​the first annular shape (center circle) of the wavelength conversion device, and the filter area is located in the area of ​​the second annular shape (outer annular shape) of the wavelength conversion device, and the second annular shape surrounds the first annular shape. It should also be noted that the wavelength conversion area corresponds to the filter area one-to-one, that is, the color type and timing of the stimulated light filtered by the filter area are the same as the color type and timing of the stimulated light generated by the wavelength conversion area.

[0148] In an embodiment of the present application, the wavelength conversion device may further include a reflection area, and the reflection area may be a scattered reflection area, that is, the reflection area may be used only to reflect the excitation light, or may scatter and reflect the excitation light. This application does not make any specific restrictions on this.

[0149] In an embodiment of the present application, the wavelength conversion device may further include a transmission zone, which may be a transmission dissipation zone, that is, the transmission zone may be used only to transmit the excitation light, or may be used to scatter the excitation light. The present application does not impose any specific restrictions on this.

[0150] In the embodiment of the present application, the reflection area (or transmission area) and the laser dissipation area in the wavelength conversion device are distributed in an annular shape along the radial direction of the substrate of the wavelength conversion device, and the reflection area (or transmission area) and the corresponding laser dissipation area are respectively located in different annular shapes; the reflection area (or transmission area) is located in the area of ​​the first annular shape (center circle) of the wavelength conversion device, and the laser dissipation area is located in the area of ​​the second annular shape (outer annular shape) of the wavelength conversion device, and the second annular shape surrounds the first annular shape. It should be noted that the reflection area (or transmission area) and the laser dissipation area correspond one-to-one, that is, the timing of the reflection area reflecting the incident excitation light (or the transmission area transmitting the incident excitation light) is the same as the timing of the laser dissipation area dissipating the incident excitation light.

[0151] It should be noted that the wavelength conversion area and the reflection area are located in different areas of the first annular shape, and the laser dissipation area and the filtering area are located in different areas of the second annular shape.

[0152] In one feasible scenario, the wavelength conversion device includes a wavelength conversion zone, a reflection zone (or a transmission zone) and a laser dissipation zone, wherein the wavelength conversion zone and the reflection zone (or the transmission zone) are located in different areas of a first circular ring (center circle) of the wavelength conversion device, and the laser dissipation zone is located in the entire area of ​​a second circular ring (outer circular ring) of the wavelength conversion device, and the second circular ring surrounds the first circular ring.

[0153] For example, refer to Figure 4 As shown in the right figure in , the wavelength conversion device includes four wavelength conversion areas and two reflection areas (or transmission areas) located in the inner circle (i.e., the first circular ring), and four filtering areas and two laser dissipation areas located in the outer circle (i.e., the second circular ring). Among them, the wavelength conversion area includes two first wavelength conversion areas (such as G area) and two second wavelength conversion areas (such as R area); the two reflection areas (or transmission areas) include excitation light reflection areas (or excitation light transmission areas) (such as B area); the four filtering areas include two first filtering areas (such as G' area) corresponding to the first wavelength conversion area and two second filtering areas (such as 'R area) corresponding to the second wavelength conversion area; the two laser dissipation areas include two laser dissipation areas (D area) corresponding to the excitation light reflection areas (or excitation light transmission areas).

[0154] In some embodiments, the light source device may further include a filter element, that is, the wavelength conversion device and the filter element are separately arranged, the filter element may be a movable filter element, or a color filter wheel, and the color filter wheel includes a plurality of filter areas, filter areas in different areas filter stimulated light of different colors or wavelengths, and the color filter wheel is used to filter the stimulated light of a certain color or wavelength, and the period of movement of the stimulated light generated by the wavelength conversion device is the same as the period of movement of the stimulated light generated by the wavelength conversion device. Of course, filtering stimulated light of some wavelengths to improve the color gamut can also be achieved by coating the wavelength conversion area, coating the splitting and combining elements, and / or setting the wavelength; for example, coating the wavelength conversion area to filter the stimulated light; for another example, setting the wavelength of the splitting and combining elements, the splitting and combining elements filter the left and right or long and short wave parts of the fluorescence spectrum, leaving the peak segment, thereby improving the color purity.

[0155] In an embodiment of the present application, the light combining component also includes a fourth light path deflecting element, which is located on the output light path of the stimulated light emitted by the light splitting and combining element and the excitation light reflected by the wavelength conversion device, and the fourth light path deflecting element can reflect light; illustratively, the fourth light path deflecting element reflects the excitation light and the stimulated light, and the fourth light path deflecting element can be a reflective element, such as a reflector.

[0156] It should be noted that since the light path deflecting element is used to change the transmission direction of light to make it converge or diverge, the light path deflecting element can be tilted so that the reflected laser irradiates along the preset light path direction. The light path deflecting element can be a curved reflector or a plane reflector.

[0157] In one possible scenario, the wavelength conversion device includes a wavelength conversion area, a reflection area, a laser dissipation area and a filtering area. Figure 4 The right picture and Figure 6 As shown, the excitation light generated by the first light source assembly is transmitted through the first area of ​​the first light energy recovery element, the light-splitting and light-combining element, and the second light energy recovery element (or the first functional unit), and is incident on the wavelength conversion area and the reflection area of ​​the wavelength conversion device in a time-sharing manner. The wavelength conversion area absorbs the excitation light and emits stimulated light and residual excitation light. The stimulated light includes the first stimulated light and the second stimulated light, and the reflection area scatters and reflects the excitation light.

[0158] Among them, the excitation light scattered and reflected by the reflection area of ​​the wavelength conversion device is reflected by at least the second light energy recovery component, the light splitting and combining element, and the fourth light path deflection element to reach the wavelength conversion device, and is transmitted after being diffused or dissipated by the corresponding laser dissipation area in the wavelength conversion device.

[0159] Among them, the residual excitation light is transmitted through the second light energy recovery component (or the first functional unit), the light-splitting and light-combining element, and reflected by the second area of ​​the first light energy recovery component, and then transmitted through the light-splitting and light-combining element and the second light energy recovery component (or the first functional unit) again, and is incident on the wavelength conversion area of ​​the wavelength conversion device to re-excite and generate stimulated light.

[0160] Among them, the first stimulated light is reflected by the first functional unit of the second light energy recovery component, and is re-emitted to the wavelength conversion device and reflected, so that the first stimulated light is emitted again in the form of a Lambertian body; the first stimulated light and the second stimulated light emitted again in the form of a Lambertian body are transmitted through the second functional unit of the second light energy recovery component, reflected by the light splitting and light combining element, and reflected by the fourth light path deflection element to reach the wavelength conversion device, and the stimulated light is filtered by the corresponding filter area in the wavelength conversion device and then transmitted out, and is combined with the excitation light in the same direction to generate the output light for emission. In this way, part of the fluorescence can be reflected back to the wavelength conversion device through the light energy recovery component, so that it will not directly participate in the subsequent light combination, but will be emitted again at the wavelength conversion device in a form close to Lambertian light, reducing the light combination loss of the fluorescence and improving the light combination efficiency. The light energy recovery component can re-inject the residual excitation light into the wavelength conversion device for re-excitation, which can improve the excitation efficiency and thus improve the light efficiency of the projection device.

[0161] In some embodiments, reference Figure 7As shown, the light splitting and combining element 41 includes a third area 411 and a fourth area 412, the fourth area 412 surrounds the third area 411, the third area 411 transmits the excitation light, and the fourth area 412 reflects the excitation light emitted through the laser dissipation area; or,

[0162] The incident light path of the excitation light generated by the first light source component 11 does not overlap with the outgoing light path of the excitation light reflected by the reflection area of ​​the wavelength conversion device 2. The light combining component also includes a fifth light path deflection element 46. The fifth light path deflection element 46 is located on the outgoing light path of the excitation light emitted through the reflection area. The light splitting and combining element 41 is located between the fifth light path deflection element 46 and the second light energy recovery component 32.

[0163] In the embodiment of the present application, the light splitting and combining element may include a third region and a fourth region, and the fourth region surrounds the periphery of the third region. The third region is located in the optical path where the excitation light is located, and can be used to transmit the excitation light, and the fourth region is located in the optical path where the excitation light and the stimulated light emitted by the wavelength conversion device are located, and can be used to reflect various types of light, such as residual excitation light, excitation light, and stimulated light.

[0164] In some embodiments, the third region of the light-splitting and light-combining element may be a through hole, a diffuser, or a light-transmitting sheet, and the fourth region of the light-splitting and light-combining element may be a polished metal material or a coated reflective sheet.

[0165] In a feasible scenario, refer to Figure 4 The right picture and Figure 7 In the left figure, the excitation light generated by the first light source assembly is transmitted through the first area of ​​the first light energy recovery element, the third area of ​​the photosplitting and combining element, and the second light energy recovery element (or the first functional unit), and is incident on the wavelength conversion area and the reflection area of ​​the wavelength conversion device in a time-sharing manner. The wavelength conversion area absorbs the excitation light and emits stimulated light and residual excitation light. The stimulated light includes the first stimulated light and the second stimulated light, and the reflection area scatters and reflects the excitation light.

[0166] Among them, the excitation light scattered and reflected by the reflection area of ​​the wavelength conversion device is transmitted through at least the second light energy recovery component (or the first functional unit), reflected by the fourth area of ​​the light splitting and light combining element, and reflected by the fourth light path deflection element to reach the wavelength conversion device, and is transmitted after being diffused or dissipated by the corresponding laser dissipation area in the wavelength conversion device.

[0167] Among them, the residual excitation light is transmitted through the second light energy recovery component (or the first functional unit), the light-splitting and light-combining element, and focused and reflected by the second area of ​​the first light energy recovery component, and then transmitted through the light-splitting and light-combining element and the second light energy recovery component (or the first functional unit) again, and is incident on the wavelength conversion area of ​​the wavelength conversion device to re-excite and generate stimulated light.

[0168] Among them, the first stimulated light is reflected by the first functional unit of the second light energy recovery component, and is re-emitted to the wavelength conversion device and reflected, so that the first stimulated light is emitted again in the form of a Lambertian body; the first stimulated light and the second stimulated light emitted again in the form of a Lambertian body are transmitted through the second functional unit of the second light energy recovery component, reflected by the fourth area of ​​the light-splitting and light-combining element, and reflected by the fourth light path deflection element to reach the wavelength conversion device, and the stimulated light is filtered by the corresponding filter area in the wavelength conversion device and then transmitted out, and is combined with the excitation light in the same direction to generate the output light for emission. In this way, part of the fluorescence can be reflected back to the wavelength conversion device through the light energy recovery component, so that it will not directly participate in the subsequent light combination, but will be emitted again at the wavelength conversion device in a form close to Lambertian light, reducing the light combination loss of the fluorescence and improving the light combination efficiency. The light energy recovery component can re-inject the residual excitation light into the wavelength conversion device for re-excitation, which can improve the excitation efficiency and thus improve the light efficiency of the projection device.

[0169] In the embodiment of the present application, the incident light path of the excitation light generated by the first light source component does not overlap with the outgoing light path of the excitation light reflected by the reflection area of ​​the wavelength conversion device. The light combining component also includes a fifth light path deflecting element, which is located on the outgoing light path of the excitation light emitted through the reflection area. The light splitting and combining element is located between the fifth light path deflecting element and the second light energy recovery component, and the fifth light path deflecting element can reflect light.

[0170] It should be noted that, since the optical path deflecting element is used to change the transmission direction of light, so that it converges or diverges. The position of the optical path deflecting element can be tilted so that the reflected laser irradiates along the preset optical path direction. The optical path deflecting element can be a curved reflector or a plane reflector. Exemplarily, the fifth optical path deflecting element can be parallel to the light splitting and combining element.

[0171] In one possible scenario, refer to Figure 4 The right picture and Figure 7 In the right figure, the incident light path of the excitation light generated by the first light source assembly does not overlap with the outgoing light path of the excitation light reflected by the reflective area of ​​the wavelength conversion device.

[0172] The excitation light generated by the first light source assembly is transmitted through the first area of ​​the first light energy recovery element, the photosplitting and combining element, and the second light energy recovery element (or the first functional unit) and is incident on the wavelength conversion area and the reflection area of ​​the wavelength conversion device in a time-sharing manner. The wavelength conversion area absorbs the excitation light and emits stimulated light and residual excitation light. The stimulated light includes the first stimulated light and the second stimulated light, and the reflection area scatters and reflects the excitation light.

[0173] Among them, the excitation light scattered and reflected by the reflection area of ​​the wavelength conversion device is transmitted through at least the second functional unit of the second light energy recovery component and the light-splitting and light-combining element to reach the fifth light path deflection element. The excitation light is reflected by the fifth light path deflection element, transmitted through the light-splitting and light-combining element, reflected by the fourth light path deflection element to reach the wavelength conversion device, and is transmitted after being diffused or dissipated by the corresponding laser dissipation area in the wavelength conversion device.

[0174] Among them, the residual excitation light is transmitted through the second light energy recovery component (or the first functional unit), the light-splitting and light-combining element, and focused and reflected by the second area of ​​the first light energy recovery component, and then transmitted through the light-splitting and light-combining element and the second light energy recovery component (or the first functional unit) again, and is incident on the wavelength conversion area of ​​the wavelength conversion device to re-excite and generate stimulated light.

[0175] Among them, the first stimulated light is reflected by the first functional unit of the second light energy recovery component, and is re-emitted to the wavelength conversion device and reflected, so that the first stimulated light is emitted again in the form of a Lambertian body; the first stimulated light and the second stimulated light emitted again in the form of a Lambertian body are transmitted through the second functional unit of the second light energy recovery component, reflected by the light splitting and light combining element, and reflected by the fourth light path deflection element to reach the wavelength conversion device, and the stimulated light is filtered by the corresponding filter area in the wavelength conversion device and then transmitted out, and is combined with the excitation light in the same direction to generate the output light for emission. In this way, part of the fluorescence can be reflected back to the wavelength conversion device through the light energy recovery component, so that it will not directly participate in the subsequent light combination, but will be emitted again at the wavelength conversion device in a form close to Lambertian light, reducing the light combination loss of the fluorescence and improving the light combination efficiency. The light energy recovery component can re-inject the residual excitation light into the wavelength conversion device for re-excitation, which can improve the excitation efficiency and thus improve the light efficiency of the projection device.

[0176] In some embodiments, reference Figure 8 As shown, the first light source assembly 11 is used to generate excitation light of a first polarization state, and the second functional unit 322 surrounds the periphery of the first functional unit 321;

[0177] The first light energy recycling element 31 includes a polarization conversion element 311 and a polarization separation element 312. The polarization conversion element 311 is used to convert the polarization state of the excitation light; the polarization separation element 312 transmits the light of the first polarization state and reflects the light of the second polarization state.

[0178] The polarization separation element 311 is located between the first light source assembly 11 and the polarization conversion element 312; or,

[0179] The polarization separation element 311 is located on the optical path of the outgoing light, and the polarization conversion element 312 is located between the light-splitting and light-combining element 41 and the second light energy recovery element 32; the light-splitting and light-combining element 41 transmits light of the first polarization state and reflects light of the second polarization state and stimulated emission.

[0180] In an embodiment of the present application, the excitation light may have polarization characteristics, and the excitation light may have parallel (Polarized, P) polarization and vertical (Senkrecht, S) polarization, where parallel polarization is also called linear polarization; in other words, the excitation light may have a P polarization state and / or an S polarization state.

[0181] In the embodiment of the present application, the first light source assembly is used to generate excitation light in a first polarization state. Here, the first polarization state may be a P polarization state.

[0182] In an embodiment of the present application, the first light energy recovery component includes a polarization conversion element and a polarization separation element. The polarization separation element can be located between the first light source assembly and the polarization conversion element. Of course, the polarization separation element can also be located on the light path where the outgoing light is located. The polarization conversion element can be located between the light splitting and light combining element and the second light energy recovery element. This application does not make specific restrictions on this. Among them, the polarization conversion element is used to convert the polarization state of the excitation light, and the polarization conversion element can be a phase difference element such as a quarter wave plate. The polarization separation element can transmit light of a first polarization state and reflect light of a second polarization state. The polarization separation element can be one of a wire grid, a polarizing beam splitter (PBS), and a 0-degree transmission P-state reflection S-state polarizer.

[0183] In the embodiment of the present application, the polarization separation element can also be located on the optical path where the outgoing light is located, and the polarization conversion element can be located between the light-splitting and light-combining element and the second light energy recovery element. The light-splitting and light-combining element can also transmit light in the first polarization state and reflect light in the second polarization state and stimulated emission.

[0184] In one possible scenario, the polarization conversion element may be located between the first light source assembly and the polarization separation element. Figure 8 As shown in the left figure in . The excitation light of the first polarization state generated by the first light source component is incident on the wavelength conversion device through the polarization separation element, the polarization conversion element, the light splitting and light combining element, and the first functional unit of the second light energy recovery element. The wavelength conversion device emits the stimulated light and the residual stimulated light. The stimulated light includes the first stimulated light and the second stimulated light.

[0185] Among them, the residual excitation light is transmitted through the first functional unit of the second light energy recovery component, the light-splitting and light-combining element, and then passes through the polarization conversion element again. Since the excitation light passes through the polarization conversion element twice, the polarization state of the residual excitation light is changed from the first polarization state to the second polarization state. At this time, after the polarization separation element reflects the residual excitation light of the second polarization state, it is incident on the polarization conversion element, and after being transmitted through the polarization conversion element, the light-splitting and light-combining element, and the first functional unit of the second light energy recovery element, it is again incident on the wavelength conversion device for re-excitation. In this way, the polarization conversion element and the polarization separation element are arranged between the first light source component and the light-splitting and light-combining element, and the polarization conversion element is used to change the polarization state of the excitation light or the residual excitation light. The polarization separation element ensures that the excitation light or the residual excitation light of different polarization states can be effectively separated, and the residual excitation light is then incident on the wavelength conversion device for re-excitation, which can improve the excitation efficiency, thereby improving the light efficiency of the projection device.

[0186] Among them, the first stimulated light is reflected by the first functional unit of the second light energy recovery component to the wavelength conversion device for reflection, and then emitted again in the form of a Lambertian body; the first stimulated light and the second stimulated light emitted again in the form of a Lambertian body are transmitted by the second functional unit of the second light energy recovery component, and reflected by the light splitting and light combining element. In this way, part of the fluorescence can be reflected back to the wavelength conversion device through the light energy recovery component, so that it will not directly participate in the subsequent light combination, but will be emitted again at the wavelength conversion device in the form of close to Lambertian light, reducing the light combination loss of the fluorescence and improving the light combination efficiency.

[0187] In another possible scenario, the polarization separation element is located on the optical path of the outgoing light, and the polarization conversion element is located between the light splitting and light combining element and the second light energy recovery element. Figure 8 As shown in the right figure in the figure. The first polarized state of the excitation light generated by the first light source assembly is transmitted through the light splitting and combining element, the polarization conversion element, and the first functional unit of the second light energy recovery element and is incident on the wavelength conversion device. The wavelength conversion device emits the stimulated light and the residual excitation light. The stimulated light includes the first stimulated light and the second stimulated light.

[0188] Among them, the residual excitation light is transmitted through the first functional unit of the second light energy recovery component, and passes through the polarization conversion element again. Since the excitation light passes through the polarization conversion element twice, the polarization state of the residual excitation light is changed from the first polarization state to the second polarization state. At this time, after the light-splitting and light-combining element reflects the residual excitation light of the second polarization state, it is injected into the polarization separation element. After the polarization separation element reflects the residual excitation light of the second polarization state, it is injected into the light-splitting and light-combining element again. After being reflected by the light-splitting and light-combining element, the deflection conversion element, and the first functional unit of the second light energy recovery element, it is injected into the wavelength conversion device again for re-excitation. In this way, the polarization conversion element is arranged between the light-splitting and light-combining element and the second light energy recovery element. By using the polarization conversion element to change the polarization state of the excitation light or the residual excitation light, and by arranging the polarization separation element on the optical path of the outgoing light, it is ensured that the excitation light or the residual excitation light of different polarization states can be effectively separated, and the residual excitation light is injected into the wavelength conversion device again for re-excitation, which can improve the excitation efficiency, thereby improving the light efficiency of the projection device.

[0189] Among them, the first stimulated light is reflected by the first functional unit of the second light energy recovery component to the wavelength conversion device for reflection, and then emitted again in the form of a Lambertian body; the first stimulated light and the second stimulated light emitted again in the form of a Lambertian body are transmitted by the second functional unit of the second light energy recovery component, reflected by the polarization conversion element, the light splitting and light combining element, and emitted by the polarization separation element. In this way, part of the fluorescence can be reflected back to the wavelength conversion device through the light energy recovery component, so that it will not directly participate in the subsequent light combination, but will be emitted again at the wavelength conversion device in the form of close to Lambertian light, reducing the light combination loss of the fluorescence and improving the light combination efficiency.

[0190] In some embodiments, the light combining component further includes one or more of the following elements: a light homogenizing element and a light modulating element; wherein the light homogenizing element and the light modulating element are located on the light path where the outgoing light is located;

[0191] The light homogenization element is used to perform light homogenization on the outgoing light;

[0192] The light modulation element is used to adjust the parameters of the outgoing light, and the parameters include: one or more of the intensity, frequency, wavelength, phase and polarization state of the light.

[0193] In the embodiment of the present application, the light homogenizing element is used to change the distribution characteristics of light, so that the originally uneven light field becomes more uniform. The light homogenizing element includes but is not limited to a light homogenizing rod, a diffuser plate, a fly-eye lens array, a double lens array and a single lens array.

[0194] In the embodiment of the present application, the light modulation element is an optical device that can adjust and control the parameters of the output light, and the parameters include: one or more of the intensity, frequency, wavelength, phase and polarization state of the light.

[0195] Among them, the intensity of light is used to characterize the energy of light; the frequency is used to characterize the number of light vibrations per unit time, which is related to the color of light; the wavelength is used to characterize the distance that light propagates in one vibration cycle, and different wavelengths correspond to different colors of light; the phase is used to describe the state parameters of light vibration, such as the polarization state, which affects phenomena such as interference and diffraction of light. The polarization state characterizes the distribution characteristics of the vibration direction of light in space. Exemplarily, light modulation elements include but are not limited to electro-optic modulators, acousto-optic modulators, and liquid crystal modulators.

[0196] In an embodiment of the present application, a light homogenizing element and a light modulating element are arranged on the optical path through which the outgoing light passes. The light homogenizing element performs light homogenization on the outgoing light, so that the light is more evenly distributed in space, which can effectively reduce hot spots (overbright areas) and dark areas in the light spot, improve visual comfort and image quality, while reducing light energy loss and improving the overall efficiency of the light source system. The light modulating element can flexibly adjust various parameters of the light, and realize the transmission and multiplexing of multi-channel optical signals by adjusting parameters such as the frequency and wavelength of the light; the light homogenizing element and the light modulating element are arranged on the optical path of the outgoing light, and the outgoing light is pre-processed and the parameters are adjusted, so as to optimize the performance of the entire optical system. The uniform light field and the precisely adjusted light parameters can improve the working efficiency and accuracy of subsequent optical elements, and reduce system errors and losses caused by light non-uniformity or inappropriate parameters.

[0197] In some embodiments, the light source device further includes a shaping module for converging the light beam; the shaping module may be disposed at one or more of the following positions:

[0198] Arranged between the light homogenizing element and the light modulating element;

[0199] Set between the light splitting and combining element and the wavelength conversion device.

[0200] In the embodiments of the present application, the shaping element is used to perform focusing and shaping processing or collimation processing on the incident light. The shaping element may be a shaping lens or an eccentric lens. As for the specific shaping element, any element that can perform focusing and shaping processing or collimation processing on the incident light can be applicable. The present application is only for illustrative purposes.

[0201] In an embodiment of the present application, a shaping element may be disposed between a light-splitting and light-combining element and a wavelength conversion device. The excitation light emitted by the first light source assembly is transmitted through the first light energy recovery component and the light-splitting and light-combining element, and then enters the shaping element. After the shaping element focuses or collimates the excitation light, the shaping element enters the wavelength conversion device through the first functional unit of the second light energy recovery component. When the wavelength conversion device is excited by the injected excitation light, the wavelength conversion device emits stimulated light and residual excitation light. Both the stimulated light and the residual excitation light are directed to the shaping element for focusing or collimation. In this way, 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 lighting or detection, thereby improving light energy utilization.

[0202] In the embodiment of the present application, the shaping element can be arranged between the light homogenizing element and the light modulating element. Figure 7 and Fig. 9 As shown, the light combining component 4 may further include a shaping element 5 (not shown in the figure), a sixth light path deflecting element 47, a seventh light path deflecting element 48, a light homogenizing element 49 and a light modulating element 410, wherein the shaping element 5 includes a first shaping element 51 and a second shaping element 52;

[0203] The first shaping element 51 is located between the light homogenizing element 49 and the sixth light path deflecting element 47 , and the second shaping element 52 is located between the seventh light path deflecting element 48 and the light modulation element 410 .

[0204] In the embodiment of the present application, the light combining component further includes: a shaping element, a sixth light path deflecting element, a seventh light path deflecting element, a light homogenizing element and a light modulation element, and the shaping element includes a first shaping element and a second shaping element.

[0205] The first shaping element is located between the light homogenizing element and the sixth light path deflecting element, and the second shaping element is located between the seventh light path deflecting element and the light modulation element.

[0206] The sixth optical path deflecting element can reflect light; illustratively, the sixth optical path deflecting element reflects the combined light emitted by the first shaping element, and the first optical path deflecting element can be a reflective element, such as a reflector.

[0207] Among them, the seventh optical path deflecting element is located on the outgoing light path of the combined light reflected by the sixth optical path deflecting element, and the seventh optical path deflecting element can reflect light; illustratively, the seventh optical path deflecting element reflects the combined light emitted by the sixth optical path deflecting element, and the seventh optical path deflecting element can be a reflective element, such as a reflector.

[0208] It should be noted that since the light path deflecting element is used to change the transmission direction of light to make it converge or diverge, the light path deflecting element can be tilted so that the reflected laser irradiates along the preset light path direction. The light path deflecting element can be a curved reflector or a plane reflector.

[0209] In a feasible scenario, continue to refer to Fig. 9 As shown, after the stimulated light and the excitation light emitted by the wavelength conversion device 2 are obtained, the stimulated light and the excitation light are homogenized by the homogenizing element to obtain a homogenized combined light, which is focused by the first shaping element, reflected by the sixth optical path turning element, reflected by the seventh optical path turning element, and focused by the second shaping element before reaching the light modulation element, which modulates the combined light to generate an output light for emission. In this way, the optical path of the embodiment of the present application forms a compact and square layout, which is conducive to heat dissipation and flat design.

[0210] In some embodiments, reference Fig.10 As shown, the light source assembly further includes a second light source assembly 12 for generating supplementary light, which is used to combine with the second stimulated light transmitted through the second functional unit 322 and the first stimulated light emitted again in the form of a Lambertian body to generate emitted light.

[0211] In the embodiment of the present application, the light source assembly may further include a second light source assembly. The second light source assembly may be a supplementary light source for generating supplementary light. The supplementary light may be combined with the stimulated light to improve the overall combined light brightness of the light source device. It should be noted that the position of the second light source assembly may be set according to actual conditions. Figure 1 A second light source component is set on the basis of the first light source component, and the supplementary light emitted by the second light source component is transmitted through the light splitting and combining component, and is combined with the stimulated light to be emitted. The supplementary light can be a monochromatic laser, such as a red laser (red, R), a green laser (green, G) and a blue laser, or a multi-color mixed laser, such as an RGB mixed laser. The color of the supplementary light can be the same as the color of the excitation light, or it can be different, and this application does not make specific restrictions. Here, the supplementary light source can be one of an RGB laser light source, a monochromatic laser light source, an LED light source, a monochromatic LED light source, a laser LD light source and a UV light source. The number of light-emitting chips in the supplementary light source can be a single light-emitting chip or a light-emitting chip array, and this application does not make specific restrictions.

[0212] In one possible case, the light splitting and combining element can transmit supplementary light.

[0213] In the embodiment of the present application, the supplementary light is combined with the second stimulated light transmitted through the second functional unit and the first stimulated light emitted again in the form of a Lambertian body to generate the emitted light, thereby improving the overall combined light brightness of the light source device.

[0214] The following is an introduction to the implementation process of the embodiment of the present application in an achievable application scenario.

[0215] In the related technology, in the projection industry, high brightness and high color gamut have been pursued. However, since the laser itself is linearly polarized light, interference will occur, and the light spot is small, the light angle is small, etc., resulting in the problem of speckle in the projection screen. In the prior art, there is a hybrid architecture of fluorescent light source and laser to improve speckle. When the laser light source and the fluorescent light source are combined by an extended light combining component (such as a light combining mirror), the fluorescent light source will have a certain light combining loss, and part of the excitation light will remain in the excited fluorescence, which reduces the light efficiency and affects the color gamut of the light.

[0216] In order to solve the above technical problems, the present application provides lighting devices corresponding to the following embodiments (corresponding to the above light source devices).

[0217] Embodiment 1

[0218] Reference Fig.11 As shown, the lighting device includes a first light source assembly 1101, a first light energy recovery component 1102, a light splitting and combining element 1103, a second light energy recovery component 1104, a wavelength conversion device 1105, light path deflection elements 1106, 1107 and 1108, a light homogenizing element 1109, and a light modulation element 1110, wherein:

[0219] The first light source assembly 1101, as an excitation light source, can be an LED or a laser LD and other new light sources, or a mixed light source of LED and laser LD, etc. There is no limit on the number of light-emitting chips in the excitation light source, and the excitation light source can be a single light-emitting chip or an array of light-emitting chips. For example, the excitation light source can be a blue laser LD, and the wavelength range of the blue laser is not limited, for example, the wavelength is 430nm-480nm; or the main wavelength of the blue laser is 455nm. For another example, the excitation light source is a blue LED, the excitation light is blue LED light, the wavelength conversion device is a wavelength conversion plate, and the wavelength conversion plate can be a static fluorescent plate (such as yellow, green, orange, red, orange fluorescent plate), and the blue LED light emitted by the blue LED is used as the excitation light to excite the wavelength conversion plate. It should be noted that the blue laser can have a polarization state such as a P state, or it can have no polarization state.

[0220] The first light energy recycling member 1102 includes a first area and a second area, wherein the first area transmits the excitation light and the second area reflects the residual excitation light. The first area can be a through hole or a coated light-transmitting sheet; the second area can be a polished metal material or a coated reflective sheet, and the curvature of the second area is conducive to the reflection and focusing of the residual blue laser.

[0221] The light-splitting and light-combining element 1103 is used to transmit the excitation light or the supplementary light and reflect the stimulated light.

[0222] The second light energy recycling element 1104 includes a first functional unit and a second functional unit. The first functional unit is located on the light path where part of the stimulated light is located, and is used to reflect part of the stimulated light to the wavelength conversion device; the second functional unit surrounds the periphery of the first functional unit, is located on the light path where another part of the stimulated light is located, and is used to transmit the other part of the stimulated light. The second light energy recycling element or the first functional unit is transmissive for blue laser.

[0223] The wavelength conversion device 1105 includes at least one wavelength conversion region G, R, such as Figure 4 As shown, the wavelength conversion area of ​​the wavelength conversion device includes a wavelength conversion layer and a reflective layer (reflecting fluorescence and transmitting blue light). The wavelength conversion layer contains a wavelength conversion material, which can be a phosphor or a phosphor, for example, a yellow phosphor that is excited to emit yellow light, such as a yttrium aluminum garnet (YAG) system phosphor containing cerium (Ce) as an activator, or a green phosphor, a red phosphor, a yellow phosphor, an orange phosphor, a tangerine phosphor, a cyan phosphor, etc. Exemplarily, the wavelength conversion area may include a first wavelength conversion area and a second wavelength conversion area, each wavelength conversion area corresponds to a wavelength conversion material, and can generate at least one color light with a different wavelength band from the excitation light, that is, the excited light can be at least one of yellow fluorescence, red fluorescence, green fluorescence, orange fluorescence, orange fluorescence, and cyan fluorescence. For example, the wavelength conversion layer of the first wavelength conversion area (G area) is mixed with green or cyan phosphor and organic glue, and is excited to generate green or cyan fluorescence; the green phosphor is aluminate, silicate or β-sialon green phosphor, and the organic glue is high-temperature silica gel or epoxy glue. The wavelength conversion layer of the second wavelength conversion region (R region) is a mixture of yellow, orange or red phosphor and organic glue, which is excited to produce yellow, red, orange or yellow fluorescence; the red phosphor is nitride, silicate or α-sialon red phosphor, the orange phosphor is a mixture of yellow phosphor and red phosphor, or silicate orange phosphor, and the organic glue is high-temperature silica gel or epoxy glue. The wavelength conversion device 1105 also includes a diffusion region D (corresponding to the above-mentioned laser dissipation region), and the diffusion region includes a diffusion / scattering material.

[0224] The optical path deflection elements 1106, 1107 and 1108 may be reflectors or dichroic mirrors. The dichroic mirrors may transmit light of some wavelength bands and reflect light of other wavelength bands.

[0225] The light homogenizing element 1109 may be a light rod, or a fly-eye lens / double lens array or a single lens array.

[0226] The light modulation element 1110 can modulate light for output.

[0227] The optical path of this scheme is as follows:

[0228] Blu-ray optical path: reference Fig.11 In the left figure, the first light source component 1101 emits a blue laser, which passes through the first area of ​​the first light energy recovery component 1102, such as a through hole or a central area, and is transmitted to the photosplitting and combining element 1103. After being transmitted through the photosplitting and combining element 1103, it is incident on the first functional unit of the second light energy recovery component 1104 and then is incident on the diffusion area of ​​the wavelength conversion device 1105. After passing through the diffusion area of ​​the wavelength conversion device 1105 and the optical path deflection elements 1106 and 1107, it passes through the diffusion area of ​​the wavelength conversion device 1105 again, and then is transmitted through the optical path deflection element 1108, combined with other colors of photosynthetic light, and then is homogenized by the light homogenizing element 1109, and finally is incident on the light modulation element 1110 for modulation and finally emitted.

[0229] Fluorescence optical path: refer to Fig.10 In the right figure, the first light source component 1101 emits a blue laser, which passes through the first area of ​​the first light energy recovery component 1102, such as a through hole or a central area, and is transmitted to the photosplitting and combining element 1103. After being transmitted through the photosplitting and combining element 1103 and incident on the first functional unit of the second light energy recovery component 1104, it is incident on the wavelength conversion area of ​​the wavelength conversion device 1105. Most of the stimulated light, i.e., the second stimulated light, is reflected by the wavelength conversion area of ​​the wavelength conversion device 1105, and is transmitted to the photosplitting and combining element 1103 through the second functional unit, and then is reflected by the photosplitting and combining element 1103 to the light path deflection element 1108, and then passes through the light path deflection element 1108 and is combined with other color photosplitting lights and then is homogenized by the light homogenizing element 1109, and finally is incident on the light modulation element 1110 for modulation and finally emitted. A small portion of the stimulated light, i.e. the first stimulated light, is reflected by the first functional unit to the wavelength conversion zone for reflection, and then emitted again in a Lambertian manner, and is transmitted through the second functional unit to be incident on the photosplitting and combining element 1103, and then is reflected by the photosplitting and combining element 1103 to the light path deflection element 1108, and then passes through the light path deflection element 1108 and the other color photosplitting light and is homogenized by the light homogenizing element 1109, and finally is incident on the light modulation element 1110 for modulation and finally emitted.

[0230] Residual excitation light optical path: The first light source component 1101 emits a blue laser, which passes through a first area of ​​the first light energy recovery component 1102, such as a through hole or a central area, and is transmitted to the photosplitting and combining element 1103. After being transmitted through the photosplitting and combining element 1103 and incident on the first functional unit of the second light energy recovery component 1104, the laser is incident on the wavelength conversion zone of the wavelength conversion device 1105. The wavelength conversion zone emits residual excitation light that does not participate in the excitation, which is transmitted through the second light energy recovery component 1104 and the photosplitting and combining element 1103 to the first light energy recovery component 1102, and then reflected by the second area of ​​the first light energy recovery component 1102, and then transmitted through the photosplitting and combining element 1103 and the second light energy recovery component 1104 again, and then incident on the wavelength conversion zone for re-excitation.

[0231] In some embodiments, the first functional unit of the first light energy recovery component, the light splitting and light combining component, and the second light energy recovery component satisfies: the focus or intermediate image of the residual blue laser reflected by the first light energy recovery component is at least located between the light splitting and light combining component and the second light energy recovery component; or, the focus is located in the second functional unit; or, the range of the incident angle satisfies

[0232] Among them, θ is the angle between the incident light incident on the photosplitting and combining element when the residual blue laser is reflected and the incident light axis of the blue laser, D represents the length of the second light energy recovery component, d represents the distance between the intersection point of the photosplitting and combining element and the incident light and the second light energy recovery component, and n represents the ratio of the diameter of the second light energy recovery component to the diameter of the second functional unit. From the above, it can be seen that the residual blue light re-excitation takes into account the excitation efficiency while combining the position of the light energy recovery component, such as by setting the intermediate image, focus, incident angle, etc. to make the re-excitation and recovery efficiency higher.

[0233] In some embodiments, the lighting device may also include a second light source component 1011, that is, a second light source component 1011 is added to the left side of the photosplitting and combining element 1103 as a supplementary light source. The supplementary light emitted by the second light source component is transmitted through the photosplitting and combining element 1103, reflected by the light path deflection element 1108 and combined with other color photosynthetic lights, and then homogenized by the light homogenizing element 1109, and finally incident on the light modulation element 1110 for modulation and finally emitted.

[0234] It should be noted that there are necessary focusing lenses or collimating lenses in the optical path. At the same time, in order to pursue better color and color gamut, a color filter wheel can be included before the light homogenizing element 1109, corresponding to the green or red color in the purified fluorescence; as the timing rotates accordingly, the wavelength conversion device such as the green fluorescent area in the fluorescent wheel corresponds to the green filter area of ​​the color filter wheel, and the same is true for other colors. The blue reflection area or blue reflection scattering area in the wavelength conversion device corresponds to the blue diffusion area of ​​the color filter wheel. It should be noted that blue laser is coherent light, and the color filter wheel can reduce coherence and reduce speckle. The color filter wheel and the fluorescent wheel can be set as a whole, and the integrated disk setting is as follows Figure 4 In the right figure, the optical path of the integrated setup is as follows Fig.12 The color filter wheel and the fluorescent wheel can also be separately arranged, and this application does not make any specific limitation on this.

[0235] Continue to refer to Figure 4 In the right figure, when the color filter wheel and the fluorescent wheel are integrated, the inner circle of the fluorescent wheel is composed of the fluorescent area (corresponding to the wavelength conversion area mentioned above) and the reflective area, and the outer circle is composed of the filter area and the diffusion area (D-diffuse). RGB represents the color of the fluorescent area or the color of the filter area. The second light source component can be a laser or LED light source of any color of red, green, and blue, which is determined according to the color missing from the optical path or the color that needs to be added according to the brightness requirement.

[0236] Embodiment 2

[0237] Embodiment 2 Compared with embodiment 1, reference Fig.12 As shown, the lighting device may further include shaping elements 1112 and 1113, wherein:

[0238] The blue laser is reflected by the wavelength conversion device 1105 and combined with the fluorescence. In order to realize that the light splitting and light combining element 1103 transmits and reflects the blue laser, the light splitting and light combining element 1103 adopts a zone coating, the middle zone transmits the blue laser, and the surrounding zones reflect the blue color after being reflected and scattered by the wavelength conversion device. The disk surface of the wavelength conversion device 1105 of this embodiment is as follows Figure 4 As shown in the right figure, the inner circle is composed of the wavelength conversion area RG and the reflection area B, the outer circle is composed of the filter area and the diffusion area (D-diffuse), and RGB represents the color of the fluorescent area or the color of the filter area.

[0239] In the embodiment of the present application, the blue laser is transmitted through the first light energy recovery component 1102, the middle area of ​​the light-splitting and light-combining element 1103, and the first functional unit of the second light energy recovery component 1104, and is irradiated to the wavelength conversion area and the reflection area of ​​the wavelength conversion device 1105 in a time-sharing manner. The wavelength conversion area generates stimulated light, which is transmitted through the second functional unit of the second light energy recovery component 1104, reflected by the light-splitting and light-combining element 1103, and reflected by the optical path deflection element 1108, and then is injected into the filter area corresponding to the wavelength conversion area of ​​the wavelength conversion device 1105 that generates the stimulated light for filtering. The blue laser reflected from the reflection area is transmitted through the second light energy recovery component 1104, reflected by the surrounding area of ​​the light-splitting and light-combining element 1103, and reflected by the optical path deflection element 1108, and then is injected into the diffusion area corresponding to the reflection area of ​​the wavelength conversion device 1105 for diffusion or dissipation. At this time, the blue laser light passing through the diffusion area is combined with the stimulated light passing through the filter area, and then homogenized by the light homogenizing element 1109, and then incident on the light modulating element 1110 for modulation and finally emitted after passing through the shaping element 1112, the light path deflecting elements 1107 and 1106, and the shaping element 1113. In this way, the lighting device formed by the above light path is compact in size and square in layout, which is conducive to heat dissipation and flat design.

[0240] It should be noted that in the embodiments of the present application, there are cases where the same elements as those in the first embodiment are not described. In this case, the function of the element has not changed and / or only the position has changed.

[0241] Embodiment 3

[0242] Embodiment 3 Compared with embodiment 2, reference Fig.13 As shown, the structure of the lighting device in the embodiment of the present application is a non-coaxial structure, that is, the incident light path of the excitation light source and the blue laser outgoing light path reflected by the wavelength conversion device do not overlap with the incident light path; the light splitting and light combining element 1103 is not partitioned and coated, the first functional unit and the second functional unit of the second light energy recovery element 1104 are divided by a preset dividing line, and a reflective element 1114 is added, wherein,

[0243] The blue laser reflected by the wavelength conversion device 1105 is transmitted through the light-splitting and light-combining element 1103, reflected by the reflecting element 1114, and then emitted through the light-splitting and light-combining element 1103. The optical axis is adjusted by the reflecting element 1014 to coincide with the fluorescent emission optical axis, which is beneficial to the uniformity of the final light output.

[0244] It should be noted that in the embodiments of the present application, there are cases where the same elements as those in embodiments one or two are not described. In this case, the function of the element has not changed, and / or only the position has changed.

[0245] Embodiment 4

[0246] Reference Fig.14 As shown, the first light energy recycling element 1102 further includes a polarization conversion element 11021 and a polarization separation element 11022. The polarization conversion element 11021 may be a 1 / 4 wave plate, and the polarization separation element 11022 may be a wire grid or a PBS or a 0-degree polarizer that transmits P-state and reflects S-state, transmitting P-state blue light and reflecting S-state blue light, wherein,

[0247] In one case, referring to Fig.14 As shown in the left figure in FIG. 1 , the polarization separation element 11022 is located between the first light source assembly 1101 and the polarization conversion element 11021 .

[0248] The polarization state of the blue laser emitted by the first light source component 1101 is the first polarization state; the blue laser of the first polarization state emitted by the first light source component 1101 passes through the polarization separation element 11022, the polarization conversion element 11021, the light-splitting and light-combining element 1103, and the second light energy recovery element 1104 when entering the wavelength conversion device 1105. After the residual excitation light emitted by the wavelength conversion device 1105 enters the first light energy recovery component 1102 through the light-splitting and light-combining element 1103, it first passes through the polarization conversion element 11021 and then enters the polarization separation element 11022 for reflection. The polarization state of the residual excitation light that passes through the polarization conversion element 11021 twice is converted to the second polarization state. The residual excitation light of the second polarization state is reflected by the polarization separation element 11022 and then enters the polarization conversion element 11021. After passing through the polarization conversion element 11021 and the light-splitting and light-combining element 1103, it can enter the wavelength conversion device 1105 again for re-excitation.

[0249] In another case, the polarization conversion element 11021 can be a polarization conversion layer, the polarization conversion element can be located between the light-splitting and light-combining element 1103 and the second light energy recovery element 1104, and the polarization separation element 11022 is located between the light-splitting and light-combining element 1103 and the optical path reversing element 1108.

[0250] Among them, the polarization state of the blue laser emitted by the first light source component 1101 is the first polarization state; the blue laser of the first polarization state emitted by the first light source component 1101 passes through the light-splitting and light-combining element 1103 (having a transparent P-reflective S characteristic), the polarization conversion element 11021 and the second light energy recovery component 1104 when entering the wavelength conversion device 1105; the residual excitation light emitted by the wavelength conversion device 1105 passes through the second light energy recovery component 1104 and the polarization conversion element 11021 to obtain the residual excitation light of the second polarization state, and the residual excitation light of the second polarization state is reflected by the light-splitting and light-combining element 1103 and enters the polarization separation element 11022, and then is reflected by the polarization separation element 11022 (having a transparent P-reflective S characteristic) and then enters the light-splitting and light-combining element 1103, and then can be injected into the wavelength conversion device again for re-excitation.

[0251] From the above, it can be seen that part of the fluorescence can be reflected back to the wavelength conversion device through the light energy recovery component, so that it will not directly participate in the subsequent light combination, but will be emitted again at the wavelength conversion device in a form close to Lambertian light, reducing the light combination loss of the fluorescence and improving the light combination efficiency. The light energy recovery component can re-inject the residual excitation light into the wavelength conversion device for re-excitation, which can improve the excitation efficiency and thus improve the light efficiency of the projection device.

[0252] The present application also provides a projection device, referring to Fig.15 As shown, the projection device includes an image processor 151 and a projection optical engine 152. Among them:

[0253] The image processor 151 may be a microcontroller, a dedicated image processing chip, etc. The microcontroller may be an ARM chip, a microcontroller unit (MCU), etc. The dedicated image processing chip may be an image signal processor (ISP), a graphics processing unit (GPU), an embedded neural network processor (NPU), etc. The image processor 151 may be used for video decoding, image quality processing, etc.

[0254] The projection optical machine 152 may include a driver chip, a spatial light modulator, and the light source device 100 described in the above embodiment. The spatial light modulator may be a digital micromirror device (DMD), a liquid crystal display (LCD), a liquid crystal on silicon (LCOS), etc. The driver chip corresponds to the spatial light modulator, for example, the digital micromirror device may be driven by a digital light processing element (DLP). The projection optical machine 152 is used to project the image to be projected into a projection screen.

[0255] In some embodiments, the projection device further includes a central controller 153 with one or more processing cores, which may be a CPU, ARM, MCU or other controller. The central controller 153 is the control center of the projection device, and uses various interfaces and lines to connect various parts of the entire projection device, and can run or execute software programs and / or operating systems stored in the memory 154, and call data stored in the memory 154. Optionally, the image processor 151 and the central controller 153 may be integrated into one processor.

[0256] In some embodiments, the projection device further includes a memory 154 of one or more computer-readable storage media, an input module 155, a communication module 156, a power supply 157 and other components. Those skilled in the art will appreciate that Fig.15 The structure of the projection device shown in the figure does not constitute a limitation on the projection device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0257] The memory 154 can be used to store software programs and operating systems. The central controller 153 executes various functional applications and data processing by running the software programs and operating systems stored in the memory 154. The memory 154 can mainly include a program storage area and a data storage area, wherein the program storage area can store the operating system, at least one application required for a function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the projection device, etc. In addition, the memory 154 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 154 can also include a memory controller to provide the central controller 153 with access to the memory 154.

[0258] The projection device may further include an input module 155, which may be used to receive input digital or character information and generate remote controller, keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0259] The projection device may further include a communication module 156. In some embodiments, the communication module 156 may include a wireless module. The projection device may perform short-range wireless transmission through the wireless module of the communication module 156, thereby providing the user with wireless broadband Internet access. For example, the communication module 156 may be used to help the user access streaming media, etc.

[0260] The projection device also includes a power supply 157 for supplying power to various components. In some embodiments, the power supply 157 can be logically connected to the central controller 153 through a power management system, so as to manage charging, discharging, and power consumption through the power management system. The power supply 157 can also include any components such as one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, and power status indicators.

[0261] It should be understood that the "one embodiment" or "an embodiment" or "an embodiment of the present application" or "the aforementioned embodiment" or "some embodiments" or "some implementation methods" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" or "an embodiment of the present application" or "the aforementioned embodiment" or "some embodiments" or "some implementation methods" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and 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 embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0262] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0263] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0264] In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be a separate unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0265] It is worth noting that the drawings in the embodiments of the present application are only for illustrating the schematic positions of various components on the device and do not represent the actual positions in the device. The actual positions of various components or areas may be changed or offset accordingly according to actual conditions (for example, the structure of the device), and the proportions of different parts of the device in the drawings do not represent the actual proportions.

[0266] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A light source device, characterized in that: include: The light source assembly includes a first light source assembly for generating excitation light; A wavelength conversion device, located on the optical path of the excitation light, for generating stimulated light under the excitation of the excitation light, wherein the stimulated light includes first stimulated light and second stimulated light; A light energy recovery component is located between the first light source component and the wavelength conversion device, and the light energy recovery component includes a first light energy recovery component and a second light energy recovery component; Wherein, the first light energy recovery element is located on the optical path of the residual excitation light emitted by the wavelength conversion device, and is used to reflect the residual excitation light to the wavelength conversion device to re-excite and generate the stimulated light; Wherein, the second light energy recovery member is located on the optical path of the stimulated light emitted by the wavelength conversion device, and the second light energy recovery member includes a first functional unit and a second functional unit, the first functional unit is located on the optical path of the first stimulated light, and is used to reflect the first stimulated light to the wavelength conversion device and emit it again in the form of a Lambertian body; the second functional unit is located on the optical path of the second stimulated light, and is used to transmit the second stimulated light and the first stimulated light emitted again in the form of a Lambertian body; a light combining component, used for combining the second stimulated light after being transmitted through the second functional unit and the first stimulated light re-emitted in the form of a Lambertian body to generate an emitted light; Wherein, the light combining component comprises a light splitting and light combining element, and the light splitting and light combining element is located on the optical path where the excitation light is located, and the light splitting and light combining element transmits the excitation light and reflects the stimulated light.

2. The device according to claim 1, characterized in that The first light energy recycling component is arranged on the optical path of the excitation light, the light splitting and light combining element is located between the first light energy recycling component and the second light energy recycling component, and the first functional unit of the first light energy recycling component, the light splitting and light combining element and the second light energy recycling component satisfies one or more of the following conditions: The light focus or intermediate image of the residual excitation light reflected by the first light energy recovery component is located between the light splitting and light combining element and the second light energy recovery component; A light focus of the residual excitation light reflected by the first light energy recycling member is located at a second functional unit of the second light energy recycling member; When the residual excitation light reflected by the first light energy recovery component enters the light splitting and light combining element, the incident angle formed between the incident light axis of the excitation light satisfies a first relational expression, wherein the first relational expression is: Among them, θ is the incident angle, D is the length of the second light energy recovery component, d is the distance between the incident point when the incident light enters the photosplitting and combining element and the second light energy recovery component, and n is the ratio of the diameter of the second light energy recovery component to the diameter of the second functional unit.

3. The device according to claim 1, characterized in that The first light energy recycling member is arranged on the optical path of the excitation light, the first light energy recycling member comprises a first area and a second area, the second area surrounds the periphery of the first area, the first area transmits the excitation light, and the second area reflects the residual excitation light; The second functional unit surrounds the periphery of the first functional unit, or the second functional unit and the first functional unit are separated by a preset dividing line, and the area of ​​the light emitting surface of the first functional unit is smaller than the area of ​​the light emitting surface of the second functional unit; The second light energy recovery element, or the first functional unit, transmits the excitation light.

4. The device according to claim 3, characterized in that The first area of ​​the first light energy recovery component is a through hole, a diffuser or a light-transmitting sheet, the second area of ​​the first light energy recovery component is a polished metal material, a coated reflective sheet or a reflector, and / or the second area is in an arc shape.

5. The device according to any one of claims 1 to 4, characterized in that: The wavelength conversion device comprises a wavelength conversion area and a laser dissipation area, wherein the wavelength conversion area and the laser dissipation area are located in the same annular shape or in different annular shapes of the wavelength conversion device; The wavelength conversion region includes a wavelength conversion layer and a reflective layer, wherein the wavelength conversion layer is used to generate stimulated light under the excitation of the excitation light, and the reflective layer is used to reflect the stimulated light and the residual excitation light in the wavelength conversion layer; The laser dissipation zone includes a laser dissipation layer and a transmission layer, the laser dissipation layer is used to dissipate the excitation light, and the transmission layer is used to transmit the excitation light.

6. The device according to claim 5, characterized in that The wavelength conversion area includes one or more wavelength conversion areas, and the wavelength conversion area and the laser dissipation area are located in the same annular shape of the wavelength conversion device. The wavelength conversion device moves periodically so that the one or more wavelength conversion areas and the laser dissipation area are periodically located on the optical path where the excitation light is located at the same time; The light combining component further comprises: a first light path deflecting element, a second light path deflecting element and a third light path deflecting element, wherein the first light path deflecting element is located on a side of the wavelength conversion device away from the light energy recovery component, the second light path deflecting element is located on an outgoing light path of the stimulated light emitted through the light splitting and light combining element, and the third light path deflecting element is located on a side of the wavelength conversion device away from the second light path deflecting element; Among them, the light splitting and combining element, the first light path deflecting element, the second light path deflecting element, and the third light path deflecting element guide the second stimulated light after being transmitted through the second functional unit, the first stimulated light emitted again in the form of a Lambertian body, and the exciting light emitted through the laser dissipation zone to combine in the same direction to generate the output light.

7. The device according to claim 5, characterized in that The wavelength conversion device further comprises a filtering area and a reflecting area, wherein the filtering area is used to filter the wavelength of the stimulated light; The wavelength conversion area, the reflection area, the laser dissipation area and the filter area are distributed in a circular ring shape along the radial direction of the substrate of the wavelength conversion device; the wavelength conversion area and the reflection area are located in a first circular ring shape, the laser dissipation area and the filter area are located in a second circular ring shape, and the second circular ring shape surrounds the first circular ring shape; The color type and timing of the stimulated light filtered by the filtering area are the same as the color type and timing of the stimulated light generated by the wavelength conversion area, and the timing of the laser dissipation area is the same as that of the reflection area; The light combining component further comprises: a fourth light path deflecting element, located on the light path of the stimulated light emitted through the light splitting and combining element and the excitation light reflected by the wavelength conversion device; Among them, the light splitting and combining element and the fourth optical path deflecting element guide the second stimulated light after being transmitted through the second functional unit, the first stimulated light emitted again in the form of a Lambertian body, and the exciting light emitted through the reflection area, are processed by the corresponding filtering area and laser dissipation area of ​​the wavelength conversion device, and are combined in the same direction to generate the output light.

8. The device according to claim 7, characterized in that The light-splitting and light-combining element comprises a third region and a fourth region, wherein the fourth region surrounds the periphery of the third region, the third region transmits the excitation light, and the fourth region reflects the excitation light emitted through the laser dissipation region; or, The incident light path of the excitation light generated by the first light source component does not overlap with the outgoing light path of the excitation light reflected by the reflection area of ​​the wavelength conversion device. The light combining component also includes a fifth light path deflecting element, which is located on the outgoing light path of the excitation light emitted through the reflection area. The light splitting and combining element is located between the fifth light path deflecting element and the second light energy recovery component.

9. The device according to claim 1, characterized in that The first light source assembly is used to generate excitation light of a first polarization state, and the second functional unit surrounds the periphery of the first functional unit; The first light energy recycling element comprises a polarization conversion element and a polarization separation element, wherein the polarization conversion element is used to convert the polarization state of the excitation light; the polarization separation element transmits the light of the first polarization state and reflects the light of the second polarization state; The polarization separation element is located between the first light source assembly and the polarization conversion element; or, The polarization separation element is located on the optical path of the outgoing light, and the polarization conversion element is located between the light-splitting and light-combining element and the second light energy recovery element; the light-splitting and light-combining element transmits the light of the first polarization state and reflects the light of the second polarization state and the stimulated light.

10. The device according to any one of claims 1 to 9, characterized in that The light combining component further includes one or more of the following elements: a light homogenizing element and a light modulating element; wherein the light homogenizing element and the light modulating element are located on the optical path where the outgoing light is located; The light homogenization element is used to perform light homogenization processing on the output light; The light modulation element is used to adjust the parameters of the emitted light, and the parameters include: one or more of the intensity, frequency, wavelength, phase and polarization state of the light.

11. The device according to claim 10, characterized in that The light source device further includes a shaping module for converging the light beam; the shaping module may be arranged at one or more of the following positions: Disposed between the light homogenizing element and the light modulating element; It is arranged between the light splitting and light combining element and the wavelength conversion device.

12. The device according to any one of claims 1 to 9, characterized in that The light source assembly further includes a second light source assembly for generating supplementary light, wherein the supplementary light is used to combine with the second stimulated light transmitted through the second functional unit and the first stimulated light re-emitted in the form of a Lambertian body to generate output light.

13. A projection device, characterized in that: The projection device comprises the light source device according to any one of claims 1 to 12.

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