Light source system and projection device

Abstract

The present application relates to the technical field of display, and discloses a light source system and a projection device. According to the light source system, primary color light (such as laser light) and stimulated light (such as fluorescent light) are mixed, so that the advantages of the two types of light can be combined, thereby greatly improving the human eye comfort, avoiding the color fringing problem of the laser light while achieving high color gamut, and improving the contrast ratio, and therefore, the picture quality of a projection device can be improved; and the light combining mode can be compatible with various configurations, achieving a large-amplitude brightness range, and improving the compatibility of the projection device.

Description

Light source system and projection equipment Technical Field

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

[0002] In projection display products, the light source system is a very important component. Its function is to convert light of different colors, different angle distributions, different brightness and different shapes into a uniform light spot that illuminates the effective area of ​​the display chip.

[0003] In the projection display industry, traditional light bulbs are increasingly being used due to their inherent limitations. New light sources such as LEDs, phosphors, and lasers, demonstrating superior brightness, color, lifespan, and energy efficiency, are gradually becoming the mainstream for projection displays. Among these new light source technologies, LEDs struggle to achieve high brightness, while lasers suffer from speckle. Therefore, achieving high brightness and high-quality image quality is a pressing issue.

[0004] Summary of the Invention

[0005] The present application provides a light source system that can be used in a projection device, which can improve the brightness and color gamut of the light source system, thereby improving the image quality of the projection device.

[0006] In a first aspect, the present application provides a light source system, comprising a light source assembly, a light guide assembly, a light combining assembly, a light conversion element, and a light homogenizing element, wherein the light conversion element includes at least one excitation region, and the light source assembly can emit excitation light and at least one primary color light;

[0007] When the light source component emits excitation light and / or target primary color light, the excitation light is incident on the target excitation area through the light guide component, the target excitation area is excited to generate target stimulated light, and the target stimulated light is guided by the light guide component to be incident on the light combining component;

[0008] The target primary color light is guided to the light combining component by the light guiding component, combined with the target excited light incident on the light combining component, and then incident on the light homogenizing element, and is homogenized by the light homogenizing element before being emitted; alternatively, the target primary color light or the target excited light is guided to the light homogenizing element by the light guiding component and / or the light combining component, and is homogenized by the light homogenizing element before being emitted, the target primary color light is any one of at least one primary color light, and the target excitation area is any excitation area of ​​at least one excitation area.

[0009] In some embodiments, the light conversion element includes a reflective region;

[0010] When the light source assembly emits excitation light, the excitation light enters the reflection area through the light guide assembly. The excitation light reflected by the reflection area is guided by the light guide assembly into the light combining assembly, and then guided to the light homogenizing element by the light combining assembly. The light is homogenized by the light homogenizing element and then emitted.

[0011] In some embodiments, the light source assembly includes a first light source and / or a second light source;

[0012] The excitation light includes the first excitation light generated by the first light source or the second excitation light generated by the second light source;

[0013] Alternatively, the light source assembly further includes a light splitting and combining assembly, the first light source generates a first excitation light, the second light source generates a second excitation light, and the light is combined into the excitation light by the light splitting and combining assembly.

[0014] In some embodiments, the light source assembly includes a first light source, a second light source, and a light splitting and combining assembly, wherein the first light source can generate a first primary color light, a second primary color light, and a first excitation light, and the second light source can generate a second excitation light;

[0015] The light-splitting and light-combining component includes a first light-splitting and light-combining element and a second light-splitting and light-combining element, the first primary color light is emitted through the first light-splitting and light-combining element and the second light-splitting and light-combining element, and the second primary color light is emitted through the second light-splitting and light-combining element; or, the first primary color light includes at least two beams of light, the light-splitting and light-combining component includes a light-splitting and light-combining element and a second light-splitting and light-combining element corresponding to the at least two beams of light, at least two beams of light are emitted through the corresponding light-splitting and light-combining element, or at least two beams of light are emitted through the corresponding light-splitting and light-combining element and the second light-splitting and light-combining element, and the second primary color light is emitted through the second light-splitting and light-combining element; or, the first primary color light includes at least two beams of light, the light-splitting and light-combining component includes a first light-splitting and light-combining element , a second light-splitting and light-combining element and a third light-splitting and light-combining element, at least two beams of light are emitted through the first light-splitting and light-combining element, part of the second primary color light is reflected by the second light-splitting and light-combining element and then emitted through the first light-splitting and light-combining element, another part of the light passes through the second light-splitting and light-combining element and then enters the third light-splitting and light-combining element, and then reflects from the third light-splitting and light-combining element and then exits through the first light-splitting and light-combining element; or, the first primary color light includes at least two beams of light, the light-splitting and light-combining component includes a light-splitting and light-combining element, a second light-splitting and light-combining element and a third light-splitting and light-combining element corresponding to the at least two beams of light, at least two beams of light are respectively emitted through the corresponding light-splitting and light-combining elements, part of the second primary color light is reflected by the second light-splitting and light-combining element, another part of the light passes through the second light-splitting and light-combining element and then enters the third light-splitting and light-combining element, and is reflected from the third light-splitting and light-combining element, and the second primary color light reflected by the second and third light-splitting and light-combining elements is emitted through the light-splitting and light-combining elements corresponding to the at least two beams of light;

[0016] The light-splitting and light-combining component also includes a fourth light-splitting and light-combining element, and the first excitation light and the second excitation light are combined at the fourth light-splitting and light-combining element and then emitted; or the light-splitting and light-combining component also includes a fourth light-splitting and light-combining element and a fifth light-splitting and light-combining element, and the first excitation light is incident on the fourth light-splitting and light-combining element after passing through the fifth light-splitting and light-combining element, and is combined with the second excitation light at the fourth light-splitting and light-combining element and then emitted.

[0017] In some embodiments, the wavelength of the first excitation light is within a first wavelength range, the wavelength of the second excitation light is within a second wavelength range, and the excitation efficiency of the second excitation light in the target excitation region to excite the stimulated light is higher than the excitation efficiency corresponding to the first excitation light; and / or the polarization state of the first excitation light is a first polarization state, and the polarization state of the second excitation light is a second polarization state;

[0018] Alternatively, the first excitation light is light of a first polarization state in a target wavelength band, and the second excitation light is light of a second polarization state in the target wavelength band.

[0019] In some embodiments, the light guide assembly includes a light guiding element and a first focusing lens group, and the light combining assembly includes a first light combining element;

[0020] The excitation light emitted by the light source assembly is incident on the target excitation area of ​​the light conversion element through the light guiding element and the first focusing lens group. The target excitation area is excited by the excitation light to generate target stimulated light. The target stimulated light is incident on the first light combining element through the first focusing lens group and the light guiding element.

[0021] The target stimulated light is incident on the light homogenizing element through the first light combining element; or the target primary color light emitted by the light source assembly is incident on the first light combining element and is combined with the target stimulated light incident on the first light combining element and then is incident on the light homogenizing element.

[0022] In some embodiments, the excitation light emitted by the light source assembly is incident on the reflective area of ​​the light conversion element via the light guiding element and the first focusing lens group;

[0023] The light combining assembly also includes a second light combining element. The excitation light reflected by the reflection area enters the first light combining element through the first focusing lens group and the light guiding element. The first light combining element reflects part of the excitation light and transmits another part. The reflected part of the excitation light enters the light homogenizing element. The transmitted part of the excitation light enters the second light combining element. After being reflected by the second light combining element, it enters the first light combining element and then enters the light homogenizing element through the first light combining element.

[0024] Alternatively, the light combining assembly further includes an adjustable element, the excitation light reflected by the reflection area is incident on the first light combining element via the first focusing lens group and the light guiding element, is incident on the adjustable element through the first light combining element, is reflected by the adjustable element, and is incident on the first light combining element, and is incident on the light homogenizing element through the first light combining element;

[0025] Alternatively, the light guiding component also includes an adjustable element, and the excitation light reflected by the reflection area enters the adjustable element through the first focusing lens group and the light guiding element, is reflected back to the light guiding element through the adjustable element, enters the first light combining element through the light guiding element, and is reflected or transmitted to the light homogenizing element through the first light combining element.

[0026] In some embodiments, the at least one primary color light includes a first primary color light and a second primary color light, the wavelength of the second primary color light is within a preset wavelength band and the polarization state is a target polarization state, and the first light combining element reflects or transmits the target stimulated light and the excitation light, and transmits or reflects the first primary color light and the second primary color light;

[0027] Alternatively, the first light combining element includes a target area; the target area transmits or reflects the target primary color light, and the area other than the target area in the first light combining element reflects or transmits the target stimulated light;

[0028] Alternatively, at least one primary color light includes a first primary color light and a second primary color light, and at least one excitation zone includes a first excitation zone and a second excitation zone; the first light combining element transmits or reflects the first primary color light, and reflects or transmits the stimulated light generated by the first excitation zone; the first light combining element includes a target area, the target area transmits or reflects the second primary color light, and the area other than the target area in the first light combining element reflects or transmits the stimulated light generated by the second excitation zone.

[0029] In some embodiments, the excitation light emitted by the light source assembly enters the first focusing lens group from one end of the light guiding element away from the first light combining element, and the main light of the excitation light emitted from the light source assembly to the first focusing lens group does not overlap with the main light of the target stimulated light and the excitation light emitted from the light conversion element to the first focusing lens group.

[0030] In some embodiments, the light combining assembly includes a first light combining component and a second light combining component;

[0031] The excitation light emitted by the light source assembly enters the target excitation area of ​​the light conversion element through the light guide assembly. The target excitation area is excited by the excitation light to generate target stimulated light, and the target stimulated light is emitted into the first light combining element.

[0032] The target stimulated light is incident on the light homogenizing element through the first light combining element; or the target primary color light emitted by the light source assembly is incident on the second light combining element, and is combined with the target stimulated light incident on the first light combining element by the second light combining element before being incident on the light homogenizing element.

[0033] In some embodiments, the light guide assembly includes a first diffusion element or a second focusing lens group;

[0034] The target primary color light emitted by the light source assembly is focused by the second focusing lens group and then injected into the light combining assembly;

[0035] Alternatively, the target primary color light emitted by the light source assembly is diffused by the first diffusion element and then incident on the light combining assembly.

[0036] In some embodiments, a beam shaping and expanding lens group and / or a second diffusion element are provided between the light combining assembly and the light homogenizing element, and the second diffusion element includes at least one diffusion area;

[0037] Alternatively, the light conversion element includes at least one diffusion region;

[0038] Among them, at least one of the excitation light and the target primary color light incident on the light combining component is diffused by at least one diffusion area and then incident on the light homogenizing element.

[0039] In some embodiments, the at least one diffusion region includes a first diffusion region, a second diffusion region, and a third diffusion region; the at least one primary color light includes a first primary color light and a second primary color light; and the at least one excitation region includes a first excitation region and / or a second excitation region.

[0040] The first primary color light is diffused by the first diffusion zone and then incident on the light homogenizing element; the second primary color light is diffused by the second diffusion zone and then incident on the light homogenizing element; the excitation light is diffused by the third diffusion zone and then incident on the light homogenizing element.

[0041] In some embodiments, the diffusion half angle of the first diffusion region is a first angle, the diffusion half angle of the second diffusion region is a second angle, and the diffusion half angle of the third diffusion region is a third angle.

[0042] In some embodiments, at least one of the excitation light and the target primary color light is diffused through at least one diffusion zone before entering the light homogenizing element, and the incident angle of its main light when entering the light homogenizing element is within the target angle range, so as to be reflected multiple times in the light homogenizing element.

[0043] In some embodiments, when the light emitted by the light source system includes target stimulated light emission, the second diffusion element is moved out of the light path;

[0044] Alternatively, the light conversion element or the second diffusion element includes a transmission area, and when the light emitted by the light source system includes target stimulated light, the transmission area of ​​the light conversion element or the second diffusion element is placed in the light path.

[0045] In some embodiments, the light source assembly can emit a first primary color light, a second primary color light, and an excitation light;

[0046] The light conversion element includes a first excitation region and / or a second excitation region and a reflection region; the light source system respectively emits, in a time sequence, any one of the following: the first primary light or the combined light of the first primary light and the stimulated light generated by the first excitation region, the combined light of the first primary light or the first primary light and the second primary light and the stimulated light generated by the second excitation region, the combined light of the first primary light and the second primary light, the combined light of the second primary light or the first primary light and the second primary light and the stimulated light generated by the first excitation region, the combined light of the second primary light or the second primary light and the stimulated light generated by the second excitation region, the combined light of the second primary light or the second primary light and the stimulated light generated by the second excitation region and the excitation light, and the excitation light;

[0047] Alternatively, the light conversion element only includes the target excitation area; the light source system emits the first primary light or the combined light of the first primary light and the stimulated light generated by the target excitation area, the second primary light or the combined light of the first primary light and the second primary light and the stimulated light generated by the target excitation area, any one of the combined light of the first primary light and the second primary light, the second primary light or the combined light of the second primary light and the stimulated light generated by the target excitation area, the combined light of the second primary light and the excitation light, and the excitation light in a time sequence.

[0048] In some embodiments, the excitation light includes a first excitation light and / or a second excitation light, and the light-emitting chip corresponding to the first excitation light and / or the second excitation light is packaged into one with the light-emitting chip corresponding to any one or all of at least one primary color light.

[0049] In some embodiments, the light source assembly includes a first light source and a dynamic adjustment element, the first light source can generate a first excitation light, and the excitation light includes a first excitation light;

[0050] The first light source emits a first excitation light, and when the dynamic adjustment element is in the first state, the first excitation light is guided to the target excitation area by the dynamic adjustment element and the light guide component;

[0051] The first light source emits a first excitation light. When the dynamic adjustment element is in the second state, the first excitation light is guided by the dynamic adjustment element, the light guide component and / or the light combining component to the light homogenizing element, and is emitted after being homogenized by the light homogenizing element.

[0052] In some embodiments, the reflective area is any one of a reflective mirror, a polished metal layer or metal plate, a substrate coated with a reflective film, particles with diffuse reflection, a microstructured reflective layer, and a reflective diffuser.

[0053] In a second aspect, the present application provides a projection device, comprising the light source system according to any one of the first aspect and possible implementations of the first aspect.

[0054] The light source system provided in the present application mixes primary color light (such as laser) and stimulated light (such as fluorescence) to combine the advantages of the two lights, thereby greatly improving the comfort of the human eye, avoiding the color edge problem of laser while also having a higher color gamut and improving contrast, thereby improving the image quality of the projection equipment; and the light combining method is compatible with multiple configurations, achieving a larger brightness range, and improving the compatibility of the projection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The above and other purposes, features and advantages of the present application will become more apparent by describing the embodiments of the present application in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps. Among them:

[0056] FIG1 is a schematic structural diagram of a light source assembly in one embodiment of the present application;

[0057] 2 to 9 are schematic structural diagrams of light source systems in various embodiments of the present application;

[0058] FIG10 is a schematic structural diagram of a projection device in one embodiment of the present application;

[0059] FIG11 is a schematic structural diagram of a projection optical engine in one embodiment of the present application;

[0060] FIG12 is a flow chart of a display control method according to an embodiment of the present application;

[0061] 13-14 are schematic diagrams of a method for determining RGB target color coordinates in various embodiments of the present application;

[0062] 15 to 24 are schematic diagrams of the emission time of each light in each embodiment of the present application;

[0063] 25 to 36 are schematic diagrams of the lighting time of each light source in each embodiment of the present application. DETAILED DESCRIPTION

[0064] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions 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. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. In addition, although the disclosure in the present application is introduced according to one or several exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete technical solution separately. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0065] In the embodiments of this application, words such as "exemplarily" and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present concepts in a concrete way.

[0066] Unless otherwise defined, the technical or scientific terms used in this application should have the usual meaning understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish descriptions. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The term "and / or" includes any and all combinations of one or more associated listed items.

[0067] In order to fully understand the present application, a detailed description will be provided below to illustrate the technical solution of the present application. The preferred embodiments of the present application are described in detail below. However, in addition to these detailed descriptions, the present application may also have other implementation methods.

[0068] The present application provides a light source system, which includes a light source component, a light guide component, a light combining component, a light conversion element and a light homogenizing element. The light conversion element includes at least one excitation region, and the light source component can emit excitation light and at least one primary color light.

[0069] When the light source component emits excitation light and / or target primary color light, the excitation light is emitted into the target excitation area through the light guide component, the target excitation area is excited to generate target stimulated light, and the target stimulated light is guided by the light guide component and emitted into the light combining component; the target primary color light is guided to the light combining component by the light guide component, and is combined with the target stimulated light emitted into the light combining component, and then is emitted after being homogenized by the light homogenizing element; or, the target primary color light or the target stimulated light is guided to the light homogenizing element through the light guide component and / or the light combining component, and is emitted after being homogenized by the light homogenizing element, the target primary color light is any one of at least one primary color light, and the target excitation area is any excitation area of ​​at least one excitation area.

[0070] The excitation region contains a wavelength conversion material, which can be a phosphor or phosphor powder. For example, it can be a yellow phosphor that emits yellow light when excited, such as an yttrium aluminum garnet (YAG)-based phosphor containing cerium (Ce) as an activator. Alternatively, it can be a green phosphor, red phosphor, cyan phosphor, orange phosphor, etc. Each excitation region can correspond to a wavelength conversion material, which can generate at least one color of light with a wavelength band different from that of the excitation light. That is, the stimulated light includes at least one color of light with a wavelength band different from that of the excitation light. For example, the stimulated light can be at least one of red, green, yellow, cyan, and orange fluorescence, and the target stimulated light can be any of red, green, yellow, cyan, and orange fluorescence. For example, if at least one excitation region includes a first excitation region and a second excitation region, the first excitation region can generate red, yellow, or orange fluorescence, and the second excitation region can generate green fluorescence. The stimulated light generated by the first excitation region can be red, yellow, or orange fluorescence, and the stimulated light generated by the second excitation region can be green fluorescence.

[0071] The light homogenizing element can be a compound eye or a light rod.

[0072] In some embodiments, the light source assembly includes a first light source or a second light source; the excitation light includes a first excitation light generated by the first light source or a second excitation light generated by the second light source.

[0073] There are no restrictions on the first light source and the first excitation light, and there are no restrictions on the second light source and the second excitation light. The first and second light sources can be LED light sources, laser LD light sources, or other new light sources, or hybrid light sources of LED light sources and laser LD light sources. There is no restriction on the number of light-emitting chips in the first and second light sources, and they can be a single light-emitting chip or a light-emitting chip array. For example, the second light source can also be an LD light source, and the second excitation light can be a blue laser, UV light, etc. For example, the first light source can be an LD light source, and the first excitation light can be a blue laser.

[0074] Optionally, the light source assembly includes a first light source and a second light source, the excitation light includes a first excitation light and a second excitation light, and the light-emitting chip corresponding to the first excitation light and / or the second excitation light is packaged into one with the light-emitting chip corresponding to any one or all of the at least one primary color light. For example, the first excitation light and the light-emitting chips corresponding to all the primary colors can be packaged into one to form a first light source; the first light source can be obtained by packaging an array of LD light-emitting chips, such as a row of blue laser LD light-emitting chips (blue lasers), a row of green laser LD light-emitting chips (green lasers), and one or two rows of red laser LD light-emitting chips (red lasers) can be packaged into one. The packaged light source has a compact structure and can reduce the volume of the projection device. Optionally, the first light source can generate at least one primary color light; for example, the at least one primary color light can be at least one of a red laser, a green laser, and a blue laser. The at least one primary color light can include the first primary color light and the second primary color light, and the first primary color light and the second primary color light are not limited. For example, the first primary color light can be a red laser and the second primary color light can be a green laser.

[0075] Optionally, the first light source and the second light source can be two independent light sources, or can be a light source packaged into one body. The light source packaged into one body has a compact structure, which can reduce the volume of the projection device.

[0076] In some embodiments, the light source assembly further includes a light splitting and combining assembly, wherein the first light source generates a first excitation light, and the second light source generates a second excitation light, which are combined into the excitation light by the light splitting and combining assembly.

[0077] Optionally, the first light source can generate a first primary color light, a second primary color light and a first excitation light, and the second light source can generate a second excitation light. The light splitting and combining methods in the light source assembly may include but are not limited to the following:

[0078] Method 1: The light-splitting and light-combining component includes a first light-splitting and light-combining element and a second light-splitting and light-combining element, the first primary color light is emitted through the first light-splitting and light-combining element and the second primary color light is emitted through the second light-splitting and light-combining element; the light-splitting and light-combining component also includes a fourth light-splitting and light-combining element, the first excitation light and the second excitation light are combined at the fourth light-splitting and light-combining element and then emitted, or, the light-splitting and light-combining component also includes a fourth light-splitting and light-combining element and a fifth light-splitting and light-combining element, the first excitation light is incident on the fourth light-splitting and light-combining element after passing through the fifth light-splitting and light-combining element, and is combined with the second excitation light at the fourth light-splitting and light-combining element and then emitted.

[0079] For example, FIG1 is a schematic structural diagram of a light source assembly provided in this embodiment; as shown in FIG1 (a) or (b), it is assumed that the first light source 01 generates blue laser, red laser and green laser, and the second light source 02 generates blue laser. The red laser generated by the first light source 01 is reflected by the first light-splitting and combining element DM1, and then emitted after passing through the second light-splitting and combining element DM2; the green laser is reflected by the second light-splitting and combining element DM2 and then emitted; the blue laser generated by the first light source 01 is reflected or transmitted by the fourth light-splitting and combining element DM4, and is combined with the blue laser generated by the second light source 02 transmitted or reflected by the fourth light-splitting and combining element DM4 and then emitted; or, as shown in FIG1 (c), the blue laser generated by the first light source 01 is reflected by the fifth light-splitting and combining element DM5 and then enters the fourth light-splitting and combining element DM4, and is combined with the blue laser generated by the transmitted first light source 02 at the fourth light-splitting and combining element DM4 and then emitted. The first light splitting and combining element and the fifth light splitting and combining element can be reflective elements (reflecting mirrors, substrates coated with reflective films, etc.), and the second light splitting and combining element can be a dichroic element with the characteristics of reflecting green laser and transmitting blue laser.

[0080] Method 2: The first primary color light includes at least two beams of light, and the light-splitting and light-combining component includes a light-splitting and light-combining element and a second light-splitting and light-combining element corresponding to the at least two beams of light respectively, at least two beams of light are emitted respectively through the corresponding light-splitting and light-combining elements or at least two beams of light are emitted respectively through the corresponding light-splitting and light-combining elements and the second light-splitting and light-combining element, and the second primary color light is emitted through the second light-splitting and light-combining element; the light-splitting and light-combining component also includes a fourth light-splitting and light-combining element, and the first excitation light and the second excitation light are combined at the fourth light-splitting and light-combining element and then emitted.

[0081] For example, as shown in FIG1(d), assume that the first light source 01 generates two red laser beams, which are respectively reflected by the light-splitting and light-combining element DM10 and the light-splitting and light-combining element DM11 and then emitted. Alternatively, as shown in FIG1(e), the two red laser beams generated are respectively reflected by the light-splitting and light-combining element DM10 and the light-splitting and light-combining element DM11 and then emitted through the second light-splitting and light-combining element DM2; the green laser is reflected by the second light-splitting and light-combining element DM2 and then emitted; the blue laser generated by the first light source 01 is reflected by the fourth light-splitting and light-combining element DM4 and then emitted by combining with the blue laser generated by the second light source 02 that is transmitted through the fourth light-splitting and light-combining element DM4. DM10 and DM11 can amplify the red laser spot, and DM2 can be a reflective concave mirror to focus the green laser.

[0082] Method three, the first primary color light includes at least two beams of light, the light splitting and combining component includes a first light splitting and combining element and a second light splitting and combining element, at least two beams of light are emitted through the first light splitting and combining element, and the second primary color light is emitted through the first light splitting and combining element and the second light splitting and combining element; the light splitting and combining component also includes a fourth light splitting and combining element, and the first excitation light and the second excitation light are combined at the fourth light splitting and combining element and then emitted.

[0083] For example, as shown in (f) in Figure 1, it is assumed that the first light source 01 generates two beams of red laser light, which are reflected by the first light-splitting and light-combining element DM1 and then emitted; the green laser light is reflected by the second light-splitting and light-combining element DM2, and then emitted through the first light-splitting and light-combining element DM1; the blue laser light generated by the first light source 01 is reflected by the fourth light-splitting and light-combining element DM4, and then emitted after being combined with the blue laser light generated by the second light source 02 transmitted through the fourth light-splitting and light-combining element DM4.

[0084] Method four, the first primary color light includes at least two beams of light, the light splitting and combining component includes a first light splitting and combining element, a second light splitting and combining element and a third light splitting and combining element, at least two beams of light are emitted through the first light splitting and combining element, part of the light in the second primary color light is reflected by the second light splitting and combining element and then emitted through the first light splitting and combining element, and the other part of the light passes through the second light splitting and combining element and then enters the third light splitting and combining element, and then is reflected by the third light splitting and combining element and then emitted through the first light splitting and combining element.

[0085] For example, as shown in Figure 1(g), the two red laser beams generated by the first light source 01 are reflected by the first light-splitting and combining element DM1 before being emitted. Part of the green laser light is reflected by the second light-splitting and combining element DM2 before being emitted by the first light-splitting and combining element DM1. The remaining part of the green laser light is transmitted through the second light-splitting and combining element DM2 and then incident on the third light-splitting and combining element DM3. After being reflected by the third light-splitting and combining element DM3, it is emitted by the first light-splitting and combining element DM1. The blue laser light generated by the first light source 01 is reflected by the fourth light-splitting and combining element DM4 and then combined with the blue laser light generated by the second light source 02 that is transmitted through the fourth light-splitting and combining element DM4 before being emitted. The green laser light spot can be enlarged by DM2 and DM3, and then incident on the homogenizing element, which can increase the incident angle and the number of reflections in the homogenizing element, thereby reducing the speckle phenomenon of the projection device.

[0086] Method five, the first primary color light includes at least two beams of light, the light-splitting and light-combining component includes a light-splitting and light-combining element, a second light-splitting and light-combining element and a third light-splitting and light-combining element corresponding to the at least two beams of light respectively, at least two beams of light are emitted through the corresponding light-splitting and light-combining elements respectively, part of the light in the second primary color light is reflected by the second light-splitting and light-combining element, and the other part of the light is transmitted through the second light-splitting and light-combining element and then incident on the third light-splitting and light-combining element, and is reflected by the third light-splitting and light-combining element. The second primary color light reflected by the second light-splitting and light-combining element and the third light-splitting and light-combining element is emitted after passing through the light-splitting and light-combining elements corresponding to the at least two beams of light; the light-splitting and light-combining component also includes a fourth light-splitting and light-combining element, and the first excitation light and the second excitation light are combined at the fourth light-splitting and light-combining element and then emitted.

[0087] For example, as shown in (h) in Figure 1, it is assumed that the first light source 01 generates two beams of red laser light, and the two beams of red laser light are respectively reflected by the light-splitting and light-combining element DM10 and the light-splitting and light-combining element DM11 and then emitted; part of the green laser light is reflected by the second light-splitting and light-combining element DM2 and then emitted by the light-splitting and light-combining element DM10, and the other part of the light is transmitted through the second light-splitting and light-combining element DM2 and then incident on the third light-splitting and light-combining element DM3, and then reflected by the third light-splitting and light-combining element DM3 and then emitted by the light-splitting and light-combining element DM11; the blue laser light generated by the first light source 01 is reflected by the fourth light-splitting and light-combining element DM4, and then emitted by combining with the blue laser light generated by the second light source 02 transmitted by the fourth light-splitting and light-combining element DM4.

[0088] Optionally, the wavelength of the first excitation light is within the first wavelength range, and the wavelength of the second excitation light is within the second wavelength range; there is no limitation on the first wavelength range and the second wavelength range, for example, the main wavelength of the first wavelength range can be 465nm, and the main wavelength of the second wavelength range can be 455nm. By combining the first excitation light and the second excitation light of different wavelengths as excitation light or as output light, the problems of speckle and purple cast of the projected image can be improved. The fourth light-splitting and light-combining element can transmit or reflect light within the first wavelength range, and reflect or transmit light within the second wavelength range by wavelength combination.

[0089] Optionally, the polarization state of the first excitation light is a first polarization state, and the polarization state of the second excitation light is a second polarization state; the first polarization state and the second polarization state are not limited, for example, the first polarization state can be a P state and the second polarization state can be an S state, or the first polarization state can be an S state and the second polarization state can be a P state. The fourth light-splitting and light-combining element can combine light by polarization state, and can reflect or transmit S-state light, and transmit or reflect P-state light; for example, it can be a polarization splitting element, such as a polarization splitting prism or a polarization splitting film.

[0090] Optionally, the first excitation light is light of a first polarization state in a target wavelength band, and the second excitation light is light of a second polarization state in the target wavelength band. The target wavelength band can be customized based on actual application conditions, for example, the target wavelength band can be 440-464 nm. The fourth light-splitting and light-combining element can transmit or reflect light of the first polarization state in the target wavelength band, and reflect or transmit light of the second polarization state in the target wavelength band.

[0091] It should be noted that the light splitting and combining methods described above in the light source assembly are merely examples. In actual applications, other reflectors, dichroic mirrors, and the like may be added to ensure that the light beams are emitted along a specific optical path or direction. Furthermore, when the light source assembly does not include a second light source, the fourth light splitting and combining element may also be a reflector.

[0092] In some embodiments, the light source assembly includes a first light source and a dynamic adjustment element. The first light source can generate a first excitation light, and the excitation light includes the first excitation light; the first light source emits the first excitation light, and when the dynamic adjustment element is in a first state, the first excitation light is emitted into the target excitation area by the dynamic adjustment element and the light guide assembly; the first light source emits the first excitation light, and when the dynamic adjustment element is in a second state, the first excitation light is guided to the light homogenizing element by the dynamic adjustment element, the light guide assembly and / or the light combining assembly, and is emitted after being homogenized by the light homogenizing element.

[0093] In which, the dynamic adjustment element can be an element including a transmission area and a reflection area, and has a corresponding driving device; the first state indicates that the driving device drives the transmission area of ​​the dynamic adjustment element to be located in the optical path, then the first excitation light can pass through the transmission area to enter the fourth photosplitting and combining element, and then be emitted after passing through the fourth photosplitting and combining element, and then be guided by the light guide component to the target excitation area of ​​the light conversion element; the second state indicates that the driving device drives the reflection area of ​​the dynamic adjustment element to be located in the optical path, then the first excitation light is reflected by the reflection area and then emitted, and then guided to the uniform light element; optionally, the reflection area can also transmit the second primary color light or the first primary color light. The dynamic adjustment element can also be a reflector or a dichroic mirror with a driving device. The first state indicates that the driving device drives the dynamic adjustment element to move out of the light path, and the first excitation light can be directly injected into the fourth light-splitting and light-combining element, and then emitted after passing through the fourth light-splitting and light-combining element, and then guided by the light-guiding component to the target excitation area of ​​the light conversion element; the second state indicates that the driving device drives the dynamic adjustment element to be located in the light path, and the first excitation light is reflected by the dynamic adjustment element and then emitted, and then guided to the light homogenizing element; optionally, if it is a dichroic mirror, the second primary color light or the first primary color light can also be transmitted. When the first excitation light is needed as the output light, its light path can be changed by the dynamic adjustment element so that it passes through fewer elements, reducing the loss of light when passing through different elements, thereby improving the utilization rate of light.

[0094] In some embodiments, the light conversion element includes a reflective area; when the light source component emits excitation light, the excitation light is emitted into the reflective area through the light guide component, and the excitation light reflected by the reflective area is guided by the light guide component into the light combining component, and is guided to the light homogenizing component through the light combining component, and is emitted after being homogenized by the light homogenizing component.

[0095] The reflective region has the property of reflecting all light and can be, for example, any of a reflective mirror, a polished metal layer or plate, a reflective film coated on a substrate, diffusely reflective particles, a microstructured reflective layer, or a reflective diffuser. Optionally, the reflective surface of the reflective region and the excitation region are substantially coplanar.

[0096] In some embodiments, the light conversion element may include a transmissive region; when the light source assembly emits excitation light, the excitation light enters the transmissive region via the light guide assembly. The excitation light transmitted by the transmissive region is guided by the light guide assembly into the light combining assembly, which then guides the light combining assembly to the light homogenizing element, where it is homogenized before exiting. The transmissive region may be a transmissive diffuser, a transmissive substrate coated with an anti-reflection coating, a transmissive substrate, or the like.

[0097] In some embodiments, the light source system may further include a color filter element. The color filter element may be a filter wheel comprising multiple filter zones that filter the excitation light, the target stimulated light, and the target primary color light, respectively. For example, the color filter element may include filter zones for filtering blue light, red light, and green light. The color filter element may have one side coated with a dichroic film and the other side as a diffuser, or may have a dual-layer structure, with one layer being a diffuser and the other being a filter.

[0098] In some embodiments, the light guiding component includes a light guiding element and a first focusing lens group, and the light combining component includes a first light combining element; the excitation light emitted by the light source component is incident on the target excitation area of ​​the light conversion element through the light guiding element and the first focusing lens group, the target excitation area is excited by the excitation light to generate target stimulated light, and the target stimulated light is incident on the first light combining element through the first focusing lens group and the light guiding element; the target stimulated light is incident on the first light combining element and is incident on the light homogenizing element; or, the target primary color light emitted by the light source component is incident on the first light combining element and is combined with the target stimulated light incident on the first light combining element and then is incident on the light homogenizing element.

[0099] Optionally, the distance between the main ray of the excitation light emitted from the light source assembly to the first focusing lens group and the optical axis of the first focusing lens group is the target distance. If the first focusing lens group includes a first lens and a second lens, the target distance can be determined based on the refractive index of the first lens, the curvature radius of the first surface of the first lens, the curvature radius of the second surface of the first lens, the center thickness of the first lens, the refractive index of the second lens, the curvature radius of the first surface of the second lens, the curvature radius of the second surface of the second lens, the center thickness of the second lens, and the distance between the first lens and the second lens. For example, the value of the target distance can be in the range of 2 to 12 mm. Optionally, the angle between the main ray of the excitation light and the normal of the light conversion element is in the range of 25 to 75 degrees.

[0100] Optionally, the first focusing lens group includes at least one aspherical mirror and at least one spherical mirror; the curvature radius range of one surface of the aspherical mirror is within a first preset radius range, and the curvature coefficient range is within a first preset coefficient range, and the curvature radius of the other surface is within a first preset radius range, and the curvature coefficient range is within a second coefficient range; the curvature radius range of one surface of the spherical mirror is within a second preset radius range, and the curvature radius of the other surface is within a third preset radius range. The first preset radius range, the second preset radius range, the third preset radius range, the first preset coefficient range, and the second coefficient range are not limited and can be customized according to actual application conditions. For example, the curvature radius range of one surface of the aspherical mirror is within 15mm to 30mm, the curvature coefficient range is within 1 to 2, the curvature radius of the other surface is within 15mm to 30mm, and the curvature coefficient range is within 0.3 to 1; the curvature radius range of one surface of the spherical mirror is within 10mm to 20mm, and the curvature radius of the other surface is greater than or equal to 150. For example, the curvature radius of one surface of an aspheric mirror ranges from -30mm to 30mm, the curvature coefficient ranges from -20 to 20, and the curvature radius of the other surface ranges from -30mm to 30mm, and the curvature coefficient ranges from -10 to 10. The curvature radius of one surface of a spherical mirror ranges from 10mm to 20mm, and the curvature radius of the other surface is greater than or equal to 100. As shown in Figure 2, lens 07 can be a spherical lens and lens 08 an aspherical lens, or vice versa. By properly setting the curvature parameters of the lens group (curvature radius and curvature coefficient, etc.), the target stimulated light spot can be made elliptical, more compatible with the shape of the subsequent homogenizing element, and thus improve light utilization.

[0101] Optionally, the light guide assembly may further include other focusing lens groups, disposed on the light-emitting or light-incoming side of each component (e.g., the light source assembly, the light-guiding component, the first light-combining component, etc.). The number of lenses in the focusing lens group is not limited, and one or more lenses may be included. The curvature parameters of the lenses are also not limited and may be set based on actual application requirements.

[0102] Optionally, the light-guiding element includes a target light-transmitting area, and the excitation light generated by the light source assembly is transmitted from the target light-transmitting area to the first focusing lens group. The target light-transmitting area can be any one of a through hole, a diffusion area, an anti-reflection area, a polarization splitting area, and a dichroic area; the diffusion area can be a diffuser, the anti-reflection area can be a light-transmitting substrate coated with an anti-reflection film, and the polarization splitting area can be a light-transmitting substrate coated with a polarization splitting film (such as reflecting or transmitting S light, transmitting or reflecting P light) or a polarization splitter; the dichroic area can also be a light-transmitting substrate coated with a dichroic film, and the dichroic film transmits the excitation light and reflects the target stimulated light, for example, the dichroic film transmits blue laser and reflects red fluorescence and green fluorescence, and can reflect a wavelength band of at least 500 to 680 nm and a transmission band of at least 440 to 470 nm. When the target light-transmitting area is a through hole, the excitation light can be lost or loses less when passing through the light-guiding element. For example, the light guiding element can be a reflector with an opening, the excitation light is transmitted from the target light-transmitting area to the first focusing lens group, and the reflector reflects the target stimulated light and the excitation light. Optionally, the target light-transmitting area can be located at either end of the light guiding element.

[0103] Optionally, the excitation light emitted by the light source assembly enters the first focusing lens group from one end of the light guiding element away from or close to the first light combining element, and the excitation light emitted by the light source assembly enters the first focusing lens group from the target light transmission area, and the main ray of the excitation light emitted from the light source assembly to the first focusing lens group does not overlap with the main ray of the target stimulated light and the excitation light emitted from the light conversion element to the first focusing lens group; for example, the target light transmission area is set at one end of the light guiding element away from the first light combining element, or the target light transmission area is set at one end of the light guiding element close to the first light combining element. When the excitation light is emitted to the light conversion element through either end of the light guiding element, and then passes through the light combining assembly and the light guiding assembly and then enters the light homogenizing element and the spatial light modulator, the main rays of the light spots of the excitation light and the target stimulated light can overlap, and the major axis and minor axis of the light spot can correspond to the long side and short side of the light homogenizing element and the spatial light modulator, respectively, thereby improving the utilization rate of light.

[0104] Optionally, the overlapping area between the target light-transmitting area and the spot area formed by the target stimulated light on the light-guiding element is less than or equal to a preset ratio of the area of ​​the target light-transmitting area. The preset ratio is not limited and can be customized based on actual application conditions, for example, within a range of 0 to 10%. The shape of the target light-transmitting area is not limited and can be rectangular, circular, elliptical, etc.

[0105] Optionally, the target side length of the target light-transmitting area is determined based on the long side length of the light-guiding element, the target distance, and the long axis length of the excitation light spot. The target side can be a side parallel to the long axis of the target stimulated light or the long side of the light-guiding element. For example, the size of the target light-transmitting area can be in the range of 11 mm * 15 mm to 9.4 mm * 4.5 mm, meaning the target side length is in the range of 9.4 mm to 15 mm.

[0106] Optionally, the excitation light generated by the light source assembly can also avoid the light guiding element and enter the first focusing lens group from the side of the light guiding element (the side away from or close to the first light combining element). Side injection can mean that the light spot of the excitation light is at a preset distance from the edge of the light guiding element, and the preset distance is greater than or equal to zero; that is, relative to the above-mentioned light guiding element with a target light transmission area, the light guiding element can be a shortened reflector; the loss of excitation light on the light guiding element can be reduced. Optionally, the light guiding element can also be an element with an L-shaped end, and the excitation light enters the first focusing lens group from the L-shaped end.

[0107] Optionally, at least one primary color light includes a first primary color light and a second primary color light, the wavelength of the second primary color light is within a preset band and the polarization state is a target polarization state, and the first light combining element reflects or transmits the target stimulated light and excitation light, and transmits or reflects the first primary color light and the second primary color light.

[0108] There are no restrictions on the preset wavelength range and target polarization state, and you can customize it based on actual application needs, such as 642nm to 648nm. For example, if the second primary light is green laser with a wavelength between 642nm and 648nm, the target polarization state can be S state; if the first primary light is red laser with a wavelength between 640nm and 650nm, and the target stimulated emission is yellow light, the first light combining element can reflect or transmit yellow light in the wavelength range of 540nm to 620nm.

[0109] Optionally, the first light combining element includes a target area; the target area transmits or reflects the target primary color light, and an area other than the target area in the first light combining element reflects or transmits the target stimulated light.

[0110] The target area can be any of a through-hole, a diffusion area, an anti-reflection area, a polarization splitting area, or a dichroic area. The diffusion area can be a diffuser, the anti-reflection area can be a transparent substrate coated with an anti-reflection film, and the polarization splitting area can be a transparent substrate coated with a polarization splitting film (e.g., reflecting or transmitting S light, or transmitting or reflecting P light). The target area can also be a transparent substrate coated with a dichroic film, which reflects the target stimulated light and transmits the target primary color light. For example, the red and green lasers generated by the light source assembly are both transmitted through the target area, while the red, yellow, or green fluorescent light generated by the light conversion element or the blue laser reflected by the reflective area are reflected from areas outside the target area.

[0111] Optionally, at least one primary color light includes a first primary color light and a second primary color light, and at least one excitation zone includes a first excitation zone and a second excitation zone; the first light combining element transmits or reflects the first primary color light, and reflects or transmits the stimulated light generated by the first excitation zone; the first primary color light and the stimulated light generated by the first excitation zone are lights of different wavelength bands, such as the first light combining element transmits or reflects red laser light, and reflects or transmits red fluorescence or yellow fluorescence, and the red laser light and the red fluorescence or yellow fluorescence have different wavelength bands. The first light combining element includes a target area, the target area transmits or reflects the second primary color light, and the area outside the target area of ​​the first light combining element reflects or transmits the stimulated light generated by the second excitation zone; the second primary color light and the stimulated light generated by the second excitation zone are lights of the same wavelength band or lights with overlapping wavelength bands, for example, the target area transmits or reflects green laser light, and the area outside the target area reflects or transmits green fluorescence.

[0112] In some embodiments, the light guide assembly includes a diffusion element or a second focusing lens group; the target primary color light emitted by the light source assembly is focused by the second focusing lens group and then injected into the light combining assembly; or, the target primary color light emitted by the light source assembly is diffused by the first diffusion element and then injected into the light combining assembly.

[0113] The first diffusion element may be a static diffusion sheet, a diffusion wheel, or a dynamic speckle reduction element, and the dynamic speckle reduction element may be a diffusion sheet capable of high-frequency movement.

[0114] Optionally, a beam shaping and expanding lens assembly and / or a second diffusion element are disposed between the light combining assembly and the light homogenizing element. The second diffusion element includes at least one diffusion zone; alternatively, the light conversion element includes at least one diffusion zone. The second diffusion element may be a static diffuser, a diffusion wheel, or a dynamic speckle reduction element; for example, a diffusion wheel includes at least one diffusion zone.

[0115] At least one of the excitation light and the target primary color light entering the light combining component is diffused by at least one diffusion zone before entering the light homogenizing element. Diffusion of each light before entering the light homogenizing element can reduce speckle in the projection device.

[0116] Optionally, at least one diffusion region includes a first diffusion region, a second diffusion region, and a third diffusion region; the first primary light or the combined light of the first primary light and the stimulated light generated by the first excitation region is diffused through the first diffusion region before being incident on the light homogenizing element; the second primary light or the combined light of the second primary light and the stimulated light generated by the second excitation region is diffused through the second diffusion region before being incident on the light homogenizing element; the excitation light is diffused through the third diffusion region before being incident on the light homogenizing element. For example, red laser light or the combined light of red laser light and red fluorescent light is diffused through the first diffusion region, green laser light or the combined light of green laser light and green fluorescent light is diffused through the second diffusion region, and blue laser light is diffused through the third diffusion region.

[0117] Optionally, the diffusion half-angle of the first diffusion zone is a first angle, the diffusion half-angle of the second diffusion zone is a second angle, and the diffusion half-angle of the third diffusion zone is a third angle. The first, second, and third angles are not limited and can be customized based on actual application needs; for example, the first and second angles are 5 degrees, and the third angle is 8 degrees. Different diffusion angles correspond to different colors of light, ensuring that the incident angles of each color of light entering the light homogenizing element are approximately equal, thereby improving the uniformity of the projection device and reducing speckle.

[0118] Optionally, at least one of the excitation light and the target primary color light is diffused by at least one diffusion zone before entering the light homogenizer. The incident angle of the principal light ray upon entering the light homogenizer is within a target angle range, allowing for multiple reflections within the light homogenizer. The target angle range can be customized based on the actual application. For example, when the light homogenizer is a light rod, the target angle range is between 12 and 28 degrees. By injecting light into the light rod at a larger angle, the number of light reflections within the light rod is increased, thereby improving the uniformity of the projection device and reducing speckle.

[0119] Optionally, when the light emitted by the light source system includes the target stimulated light, the second diffusing element is moved out of the light path; the light source system may include a driving device corresponding to the second diffusing element, which moves the second diffusing element out of the light path when the light emitted by the light source system includes the target stimulated light, and moves the second diffusing element into the light path when the light emitted by the light source system does not include the target stimulated light, thereby diffusing the target primary color light and the excitation light. Alternatively, the light conversion element or the second diffusing element includes a transmission area, and when the light emitted by the light source system includes the target stimulated light, the transmission area of ​​the light conversion element or the second diffusing element is placed in the light path; the transmission area may be coated with an anti-reflection film or a transparent substrate, etc. The target primary color light and the excitation light are diffused through the diffusion area of ​​the light conversion element or the second diffusing element.

[0120] In some embodiments, the excitation light emitted by the light source assembly is incident on the reflective area of ​​the light conversion element through the light guiding element and the first focusing lens group; the optical path of the excitation light after being reflected by the reflective area may include the following:

[0121] (1) The light combining assembly further includes a second light combining element. The excitation light reflected by the reflection area enters the first light combining element through the first focusing lens group and the light guiding element. The first light combining element reflects part of the excitation light and transmits another part. The reflected part of the excitation light enters the light homogenizing element. The transmitted part of the excitation light enters the second light combining element. After being reflected by the second light combining element, the excitation light enters the first light combining element and then passes through the first light combining element to enter the light homogenizing element.

[0122] For example, as shown in FIG2 , which is a schematic diagram of a light source system provided by this embodiment, different forms of dotted lines with arrows in the figure are used to schematically represent the optical paths of various lights. The light source system includes a light source assembly, focusing lens groups 03 and 04, a light guiding element 05, a first focusing lens group 07 and 08, a light conversion element 09, a focusing lens group 10, a second focusing lens group 13 and 14, a first light combining element 15, a second light combining element 06, focusing lens groups 16 and 17, and a light homogenizing element 18; the light source assembly includes a first light source 01 and a second light source 02 and a light splitting and combining assembly, and the light source assembly emits blue laser, red laser, and green laser, and the light combining method of the light source assembly is not limited; the light conversion element includes an excitation area, a reflection area, and a diffusion area for generating green fluorescence.

[0123] When the light source system is required to emit red light, the light source assembly emits red laser light, which passes through the second focusing lens group 13 and 14, the first light combining element 15, the focusing lens group 16 and 17 and the diffusion area of ​​the light conversion element 09 and is incident on the light homogenizing element 18.

[0124] When the light source system is required to emit green light, the light source assembly emits blue laser; the blue laser is emitted through the focusing lens groups 03 and 04, the light guiding element 05 and the first focusing lens group 07 and 08 into the excitation area of ​​the light conversion element 09 that produces green fluorescence. The excitation area is excited by the blue laser to produce green fluorescence, and the green fluorescence is emitted into the first light combining element 15 through the first focusing lens group 07 and 08 and the light guiding element 05; the green fluorescence emitted into the first light combining element 15 is reflected by the first light combining element 15, and then emitted into the uniform light element 18 through the focusing lens groups 16 and 17 and the diffusion area of ​​the light conversion element 09.

[0125] When the light source system is required to emit blue light, the light source assembly emits blue laser; the blue laser is incident on the reflection area of ​​the light conversion element 09 through the focusing lens groups 03 and 04, the light guiding element 05 and the first focusing lens group 07 and 08, and the blue laser reflected by the reflection area is incident on the first light combining element 15 through the first focusing lens group 07 and 08 and the light guiding element 05, and the first light combining element 15 reflects part of the excitation light and transmits another part of the light, and the reflected part of the excitation light is incident on the uniform light element 18 through the focusing lens groups 16 and 17 and the diffusion area of ​​the light conversion element 09, and the transmitted part of the excitation light is incident on the second light combining element 06, and after being reflected by the second light combining element 06, it is incident on the first light combining element 15, and is incident on the uniform light element 18 through the first light combining element 15, the focusing lens groups 16 and 17 and the diffusion area of ​​the light conversion element 09.

[0126] (2) The light combining component also includes an adjustable element. The excitation light reflected by the reflection area enters the first light combining element through the first focusing lens group and the light guiding element, enters the adjustable element through the first light combining element, enters the first light combining element after being reflected by the adjustable element, and enters the light homogenizing element through the first light combining element. Optionally, the target light transmission area is set at an end of the light guiding element away from the first light combining element. Optionally, the size of the adjustable element is greater than or equal to the size of the light guiding element; the sizes of the long side and the short side of the adjustable element are respectively greater than or equal to the sizes of the long axis and the short axis of the light spot of the target primary color light; the loss of the target primary color light caused by the thickness of the adjustable element can be reduced.

[0127] For example, FIG3 is a schematic diagram of another light source system provided by this embodiment. Compared to the light source system shown in FIG2 , the second light combining element is omitted and an adjustable element 12 is added. The light source assembly emits blue, red, and green laser light. The first light combining element 15 reflects fluorescence (green and red or yellow) and transmits blue, red, and green laser light. The adjustable element 12 transmits red and green laser light and reflects blue laser light. The light conversion element includes an excitation region for generating green fluorescence and / or an excitation region for generating red or yellow fluorescence, a reflection region, and a diffusion region.

[0128] When the light source system is required to emit red light, the light source assembly emits red laser and blue laser; the blue laser is emitted through the focusing lens groups 03 and 04, the light guiding element 05 and the first focusing lens group 07 and 08 into the excitation area of ​​the light conversion element 09 that produces red fluorescence or yellow fluorescence, and the excitation area is excited by the blue laser to produce red fluorescence or yellow fluorescence, and the red fluorescence or yellow fluorescence is emitted into the first light combining element 15 through the first focusing lens group 07 and 08 and the light guiding element 05; the red laser emitted by the light source assembly is emitted through the second focusing lens group 13 and 14 into the first light combining element 15, and after being combined with the red fluorescence or yellow fluorescence emitted into the first light combining element 15, it is emitted into the uniform light element 18 through the focusing lens groups 16 and 17 and the diffusion area of ​​the light conversion element 09.

[0129] When the light source system is required to emit green light, the process is similar to that of generating red fluorescence and will not be described in detail.

[0130] When the light source system is required to emit blue light, the light source assembly emits blue laser light; the blue laser light passes through the focusing lens groups 03 and 04, the light guiding element 05, and the first focusing lens group 07 and 08 and enters the reflection area of ​​the light conversion element 09; the blue laser light reflected from the reflection area passes through the first focusing lens group 07 and 08 and the light guiding element 05 and enters the first light combining element 15; passes through the first light combining element 15 and enters the adjustable element 12; after being reflected by the adjustable element 12, it enters the first light combining element 15; passes through the first light combining element 15, the focusing lens groups 16 and 17, and the diffusion area of ​​the light conversion element 09 and enters the uniform light element 18. Alternatively, the light conversion element includes an excitation area that generates cyan light; when the light source system is required to emit blue light, the blue laser light can be made to enter the excitation area that generates cyan light; the excitation area generates cyan light; for details, refer to the description of generating red fluorescence, which will not be repeated here; after passing through the adjustable element 12 or the first light combining element 15, the required blue light band is intercepted to obtain blue light.

[0131] For example, FIG4 is a schematic diagram of another light source system provided by this embodiment. Compared to the light source system shown in FIG3 , the light source system shown in FIG4 does not include the second focusing lens groups 13 and 14, but adds a first diffusion element 19. The first diffusion element 19 can be a dynamic speckle reduction element, or the first diffusion element 19 can be omitted and replaced by a light conversion element 09 having at least one diffusion region. The light source assembly includes a first light source 01 and a second light source 02. The first light source 01 includes a red laser, a blue laser, and a green laser. The light combining method of the light source assembly can be as described in FIG1 (g) above, or the second light source 02 can be omitted. In this case, the fourth light splitting and combining element can be a reflector. The light conversion element includes an excitation region and a reflection region for generating red or yellow fluorescence. The size of the adjustable element 12 is greater than or equal to the size of the light guiding element 05. The adjustable element 12 transmits red and green laser light and reflects blue light. The long and short sides of the adjustable element 12 are respectively greater than or equal to the long and short axes of the red and green laser light spots. The light guiding element 05 may be a reflector with a through hole, which has a high reflection efficiency of the stimulated light and reduces the loss of the stimulated light.

[0132] When the light source system is required to emit red light, the light source assembly emits red laser and blue laser; the blue laser is transmitted through the focusing lens groups 03 and 04, the light guiding element 05 and the first focusing lens group 07 and 08 and is incident on the excitation area of ​​the light conversion element 09 that produces red fluorescence or yellow fluorescence. The excitation area is excited by the blue laser to produce red fluorescence or yellow fluorescence, and the red fluorescence or yellow fluorescence is incident on the first light combining element 15 through the first focusing lens group 07 and 08 and the light guiding element 05; the red laser emitted by the light source assembly is diffused by the first diffusion element 19 and then is incident on the adjustable element 12, and is incident on the first light combining element 15 through the adjustable element 12, and after being combined with the red fluorescence or yellow fluorescence incident on the first light combining element 15, is incident on the uniform light element 18 through the focusing lens groups 16 and 17.

[0133] When the light source system is required to emit green light, the light source assembly emits green laser light, which is diffused by the first diffusion element 19 and then incident on the adjustable element 12, and then incident on the first light combining element 15 through the adjustable element 12, and then incident on the light homogenizing element 18 through the first light combining element 15 and the focusing lens group 16 and 17.

[0134] When the light source system is required to emit blue light, the process is similar to that in FIG3 above, except that it does not pass through the diffusion zone of the light conversion element 09, and will not be described in detail here. Alternatively, the light source assembly may include a dynamic adjustment element (not shown in the figure). When the light source system is required to emit blue light, the first light source emits blue laser light, and the dynamic adjustment element is in the second state. After being reflected by the dynamic adjustment element, the blue laser light passes through the first light splitting and combining element DM1, the first diffusion element 19, the adjustable element 12, the first light combining element 15, and the focusing lens groups 16 and 17 and is emitted into the light homogenizing element 18.

[0135] (3) The light guide assembly also includes an adjustable element. The excitation light reflected by the reflective area enters the adjustable element through the first focusing lens group and the light guide element, is reflected back to the light guide element by the adjustable element, passes through the light guide element and enters the first light combining element, and is reflected or transmitted to the light homogenizing element by the first light combining element. The adjustable element can be a reflective diffuser, a reflector, etc. The target light transmission area is set at one end of the light guide element close to the first light combining element.

[0136] For example, Figure 5 shows a schematic diagram of another light source system provided by this embodiment. Compared to the light source system shown in Figure 3, the position of tunable element 12 is swapped, and tunable element 12 reflects the excitation light. The red and green lasers do not need to pass through tunable element 12, which can reduce light loss.

[0137] The blue laser reflected by the reflection area of ​​the light conversion element 09 is incident on the adjustable element 12 through the first focusing lens group 07 and 08 and the light guiding element 05, is reflected back to the light guiding element 05 through the adjustable element 12, and is incident on the first light combining element 15 through the light guiding element 05; after being reflected by the first light combining element 15, it passes through the focusing lens group 16 and 17 and the diffusion area of ​​the light conversion element 09 to the uniform light element 18, or, as shown in Figure 6, passes through the first light combining element 15, the focusing lens group 16 and 17 and the second diffusion element 22 to the uniform light element 18, and the second diffusion element 22 can be a diffusion wheel or a static diffusion plate, etc.; at the same time, the first light combining element 15 reflects the red laser and the green laser.

[0138] For example, FIG7 is a schematic diagram of another light source system provided by this embodiment. Compared to the light source system shown in FIG5 , second focusing lens groups 13 and 14 are replaced by a first diffusion element 19, focusing lens groups 16 and 17 are replaced by a second diffusion element 22, and light homogenizing element 18 can be a compound eye. The light conversion element can include an excitation region that generates red or yellow fluorescence and / or an excitation region and a reflection region that generates green fluorescence.

[0139] There are two red laser beams in the light source assembly. The red laser spot can be enlarged by the light-splitting and light-combining elements DM10 and DM11 and the first diffusion element 19, and can be wavelength-combined with the red fluorescent light at the first light-combining element 15. The green laser in the light source assembly is focused by the reflective concave mirror DM2 and then injected into the target area of ​​the first light-combining element 15 through the first diffusion element 19. The size of the target area can be set smaller to reduce light loss and improve light utilization. The red laser and the green laser are then amplified and speckle eliminated by the second diffusion element 22, which can improve the uniformity of the projection image of the projection device. Optionally, the light conversion element can also include a diffusion area, or the first diffusion element 19 can be replaced by a diffusion area in the light conversion element. Optionally, the first light-combining element can be replaced by a dynamic speckle elimination element, and the second diffusion element 22 is not provided, which can reduce fluorescence loss.

[0140] For example, as shown in FIG8 , it is a schematic diagram of another light source system provided in this embodiment; compared with the light source system shown in FIG7 , the light source assembly includes two beams of red lasers, and the red lasers are closer to the compound eye to avoid excessive light spot divergence due to a distance too far.

[0141] (4) The light guide component includes a light guiding element and a first focusing lens group, and the light combining component includes a first light combining element and a second light combining element; the excitation light emitted by the light source component is incident on the target excitation area of ​​the light conversion element through the light guiding element and the first focusing lens group, the target excitation area is excited by the excitation light to generate target stimulated light, and the target stimulated light is incident on the first light combining element; the target stimulated light is incident on the uniform light element through the first light combining element; or, the target primary color light emitted by the light source component is incident on the second light combining element, and after being combined with the target stimulated light incident on the first light combining element, is incident on the uniform light element.

[0142] For example, as shown in FIG9 , there is a schematic diagram of the structure of another light source system provided in this embodiment. As shown in FIG9 , the light source system includes a light source assembly, focusing lens groups 03 and 04, a light conversion element 09, focusing lens groups 16 and 17, a first light combining element 15, a second light combining element 06, and a light homogenizing element 18. The light source assembly emits blue laser light, red laser light, and green laser light. The light conversion element includes an excitation region, a transmission region, and a diffusion region for generating green fluorescence, red fluorescence, yellow fluorescence, or orange fluorescence. The second light combining element 06 reflects red laser light and green laser light, and the first light combining element 15 transmits blue laser light, yellow fluorescence, red fluorescence, orange fluorescence, and / or green fluorescence.

[0143] When the light source system is required to emit red light, the light source assembly emits red laser light, which is incident on the second light combining element 06 through the diffusion area of ​​the light conversion element 09, reflected by the second light combining element 06 to the first light combining element 15, and then reflected by the first light combining element 15 to the light homogenizing element 18. Alternatively, the light source assembly emits red and blue laser light; the blue laser light is incident on the excitation area of ​​the light conversion element 09 that produces yellow fluorescence, red fluorescence, or orange fluorescence through the focusing lens groups 03 and 04, and the excitation area is excited by the blue laser light to produce yellow fluorescence, red fluorescence, or orange fluorescence, which is incident on the first light combining element 15 through the focusing lens groups 16 and 17; the green laser light is incident on the second light combining element 06 through the diffusion area of ​​the light conversion element 09, reflected by the second light combining element 06 to the first light combining element 15, and then combined with the green fluorescence incident on the first light combining element 15 to enter the light homogenizing element 18.

[0144] When the light source system is required to emit green light, the light source assembly emits green laser and blue laser; the blue laser is incident on the excitation area of ​​the light conversion element 09 that produces green fluorescence through the focusing lens groups 03 and 04, and the excitation area is excited by the blue laser to produce green fluorescence, and the green fluorescence is incident on the first light combining element 15 through the focusing lens groups 16 and 17; the green laser is incident on the second light combining element 06 through the diffusion area of ​​the light conversion element 09, and is reflected by the second light combining element 06 to the first light combining element 15, and is combined with the green fluorescence incident on the first light combining element 15 and then incident on the uniform light element 18.

[0145] When the light source system is required to emit blue light, the light source assembly emits blue laser; the blue laser is incident on the transmission area of ​​the light conversion element 09 through the focusing lens groups 03 and 04, and the blue laser transmitted by the transmission area is incident on the first light combining element 15 through the focusing lens groups 16 and 17, and is incident on the light homogenizing element 18 through the first light combining element 15.

[0146] In some embodiments, the light source assembly can emit the first primary color light, the second primary color light and the excitation light, and the light conversion element includes a first excitation region and / or a second excitation region and a reflection region; the light source system respectively emits the first primary color light or the combined light of the first primary color light and the stimulated light generated by the first excitation region, the combined light of the first primary color light or the first primary color light and the second primary color light and the stimulated light generated by the second excitation region, the combined light of the first primary color light and the second primary color light, the combined light of the second primary color light or the first primary color light and the second primary color light and the stimulated light generated by the first excitation region, the combined light of the second primary color light or the second primary color light and the stimulated light generated by the second excitation region and the excitation light, and the excitation light.

[0147] For example, the light source system can sequentially emit red laser light or a combination of red laser light and red fluorescence, red laser light and green laser light or a combination of red laser light and green fluorescence, red laser light and green laser light or a combination of red laser light and green fluorescence, green laser light and red fluorescence, green laser light and red fluorescence, green laser light or a combination of green laser light and green fluorescence, green laser light and blue laser light or a combination of green laser light and green fluorescence, or blue laser light. Optionally, the blue laser can also be replaced with cyan fluorescence generated in the excitation region.

[0148] The light conversion element only includes a target excitation area; the light source system emits the first primary light or the combined light of the first primary light and the stimulated light generated by the target excitation area, the second primary light or the combined light of the first primary light and the second primary light and the stimulated light generated by the target excitation area, any one of the combined light of the first primary light and the second primary light, the second primary light or the combined light of the second primary light and the stimulated light generated by the target excitation area, the combined light of the second primary light and the excitation light, and the excitation light in a time sequence.

[0149] For example, the target excitation area produces yellow fluorescence, and the light source system can emit red laser or a combination of red laser and yellow fluorescence, red laser and green laser or a combination of red laser and green laser and yellow fluorescence or a combination of green laser and yellow fluorescence, green laser or a combination of green laser and yellow fluorescence, a combination of green laser and blue laser, and blue laser in sequence.

[0150] In some embodiments, the light source system may also sequentially emit the first primary color light or the combined light of the first primary color light and the stimulated light generated by the first excitation region, the second primary color light or the combined light of the second primary color light and the stimulated light generated by the second excitation region, and the excitation light.

[0151] From the above, it can be seen that the light source system provided in this embodiment can combine the advantages of the two lights by mixing primary color light (such as laser) and stimulated light (such as fluorescence), thereby greatly improving the comfort of the human eye, avoiding the color edge problem of laser, and having a higher color gamut and improving contrast, thereby improving the image quality of the projection equipment; and the light combining method is compatible with multiple configurations, achieving a larger brightness range, and improving the compatibility of the projection equipment.

[0152] FIG10 is a schematic diagram of the functional modules of a projection device provided by the present application. As shown in FIG10 , the projection device includes an image processor 101 and a projection optical engine 102.

[0153] Image processor 101 may be a microcontroller, a dedicated image processing chip, or the like. The microcontroller may be an ARM chip, a microcontroller unit (MCU), or the like. The dedicated image processing chip may be an image signal processor (ISP), a graphics processing unit (GPU), or an embedded neural network processing unit (NPU). Image processor 101 may be used for video decoding, image quality processing, and the like.

[0154] FIG11 is a schematic diagram of the structure of a projection light engine 102 provided in the present application. As shown in FIG2 , the projection light engine 102 includes a light source system 201, an illumination system 202, a light modulator 203, and an imaging system 204 according to any of the above-mentioned embodiments. The light source light generated by the light source system 201 is irradiated onto the light modulator 203 via the illumination system 202. The light modulator 203 modulates the incident light source light into image light, which is then irradiated into the imaging system 204. The image light is finally imaged onto a projected object such as a screen to form a projection image. The light modulator 203 can be any one of a DMD, an LCOS, and an LCD; the imaging system 204 is generally a lens system, such as a projection lens.

[0155] In addition, the light source system 201 may further include a light source control module (not shown in the figure), which can control one or more light sources in the light source system 201 so that the light source system 201 emits light of the wavelength band required to form the projection image. As described in the above embodiment, the light source light generated by the light source system 201 includes at least a narrow spectrum light and a broad spectrum light. For example, the narrow spectrum light may include target primary color light (such as the first primary color light and the second primary color light) and excitation light (the first excitation light and / or the second excitation light). The broad spectrum light is the target stimulated light generated by the target excitation area (such as the first stimulated light generated by the first excitation area and / or the second excitation light generated by the second excitation area). The target primary color light and the target stimulated light have the same color, or the spectrum of the target stimulated light at least includes the spectrum of the target primary color light.

[0156] In a projection device, the original color gamut of the light source light generated by the light source system 201 may not provide a good display effect. For example, the original color gamut may be very large. In some scenarios, a large color gamut can cause the colors of the displayed image to be distorted or too glaring, affecting the user experience. In some embodiments, the projector 102 may also include a color gamut subsystem that performs adjustments based on the original color gamut to improve the display effect. As shown in Figure 11, the projector 102 also includes a color gamut adjustment module 212 and a control module 213. The color gamut adjustment module 212 is used to obtain target parameters based on the original color gamut of the light source light and the target color gamut corresponding to the target display mode. The target parameters include target color coordinates and target brightness gains for red light, green light, blue light, and white light, or target color coordinates and target brightness gains for red light, green light, blue light, and white light, and target color coordinates and target brightness gains for at least one of cyan light, magenta light, and yellow light. The control module 213 is used to control the light modulation device 203 based on the target parameters obtained by the color gamut adjustment module 212 to achieve the target requirements.

[0157] FIG12 is a flow chart of a display control method provided by this embodiment, which is applicable to the above-mentioned projection optical machine 102. As shown in FIG12 , the display control method includes:

[0158] S1001. Obtain target parameters based on the original color gamut of the light source and the target color gamut corresponding to the target display mode. The target parameters include target color coordinates and target brightness gains of red light (R), green light (G), blue light (B), and white light (W), or include target color coordinates and target brightness gains of red light, green light, blue light, and white light and target color coordinates and target brightness gain of at least one of cyan light (C), magenta light (M), and yellow light (Y). In this embodiment, the red light here refers to the light when only the light source that generates light containing the red light spectrum is turned on; green light refers to the light when only the light source that generates light containing the green light spectrum is turned on; blue light refers to the light when only the light source that generates light containing the blue light spectrum is turned on; cyan light refers to the light obtained by mixing green light and blue light, or the light that remains through the human eye's vision when the light source that generates green light is turned on at the previous moment and the light source that generates blue light is turned on at the next moment, or the light that the light source that generates green light and the light source that generates blue light are turned on at the same time; magenta light refers to the light obtained by mixing red light and blue light, or the light that remains through the human eye's vision when the light source that generates red light is turned on at the previous moment and the light source that generates blue light is turned on at the next moment, It can be the light obtained by lighting a light source that generates red light and a light source that generates blue light at the same time; yellow light refers to the light obtained by mixing red light and green light, or the light remaining through human vision when the light source that generates red light is lit at the previous moment and the light source that generates green light is lit at the next moment, or it can be the light obtained by lighting a light source that generates red light and a light source that generates green light at the same time. For example, the main wavelength range of red light is 600-660nm, the main wavelength range of blue light is 440-460nm, the main wavelength range of green light is 500-580nm, the main wavelength range of yellow light is 580-595nm, the main wavelength range of cyan light is 470-500nm, and the main wavelength range of magenta light is 580-600nm.

[0159] The original color gamut of the projection light engine 102 can be obtained by measurement, and then the measurement data is stored in the projection device, that is, the Y (brightness) and xy (color coordinates) values ​​of RGBW are known. In this embodiment, the original parameters include the original color coordinates and original brightness ratios of RGBW. The original brightness ratio of the four RGBW is equal to the ratio of their respective original brightness to the original brightness of W. For example, the original brightness ratio of R is equal to the original brightness Y of R. B The original brightness Y of W W The original brightness ratio of W is equal to 1. Using the original brightness ratio instead of the original brightness improves accuracy. Optionally, the original color gamut may also include at least one item in CMY, and the original parameters may also include the original color coordinates and original brightness ratio of at least one item in CMY, which can also be obtained through measurement.

[0160] Once the display mode is determined, the target color gamut is also determined. For example, the target color gamut corresponding to Mode 1 is the P3 color gamut, and the target color gamut corresponding to Mode 2 is the Rec709 color gamut. The projector 102 can select the corresponding display mode or target color gamut as needed, or the user can select the display mode or target color gamut. In other embodiments, the target color gamut of the projector 102 can also be fixed, that is, the projector 102 has only one target color gamut.

[0161] The target parameters may include only the target color coordinates and target brightness gain of RGBW. Optionally, the target parameters may also include the target color coordinates and target brightness gain of any one of CMY to further improve color accuracy. This embodiment uses the example of target parameters including the target color coordinates and target brightness gain of RGBCMYW as a detailed description. Here, R represents red light, G represents green light, B represents blue light, C represents cyan light, M represents magenta light, and Y represents yellow light. The color coordinates are represented by (x, y).

[0162] In some embodiments, the target brightness gain of W is set to 1, and the target white field color point is consistent with the original white field color point, that is, the target color coordinates of W are consistent with the original color coordinates, the white balance state is not changed, and the brightness before and after the color gamut adjustment remains unchanged.

[0163] Furthermore, the target color coordinates and target brightness gain of RGB can be obtained based on the original color coordinates and original brightness of RGB corresponding to the original color gamut and the color coordinates of RGB corresponding to the target color gamut. Then, the target color coordinates and target brightness gain of CMY can be obtained based on the target color coordinates and target brightness of RGB. Optionally, the target brightness gain of CMY can be set to a constant N, with a value range of N from 0 to 2, and preferably, N is equal to 1. A specific algorithm is exemplified below.

[0164] 1. Calculate the RGB target color coordinates.

[0165] Specifically, the target color coordinates of RGB are determined according to the intersection of the original color gamut and the target color gamut, where the target color coordinates of R are the coordinates corresponding to the point with the largest x value in the intersection; the target color coordinates of G are the coordinates corresponding to the point with the largest y value in the intersection; and the target color coordinates of B are the coordinates corresponding to the point with the smallest sum of x and y values ​​in the intersection.

[0166] FIG13 and FIG14 are schematic diagrams of a method for determining the target color coordinates of RGB provided in this embodiment. As shown in FIG13 and FIG14, in the polygon vertex sets of the two triangles of the original color gamut and the target color gamut, the one with the largest y value is the target color point G, the one with the largest x value is the target color point R, and the one with the smallest x+y value is the target color point B, thereby determining the target color coordinates R(x RT ,y RT ),G(x GT,y GT ),B(x BT ,y BT ).

[0167] 2. Calculate the target brightness gain of RGB.

[0168] According to the original color coordinates and original brightness of RGB corresponding to the original color gamut and the target color coordinates and first brightness of R, the target maximum brightness Y of R is obtained. max_R According to the original color coordinates and original brightness of RGB corresponding to the original color gamut and the target color coordinates and second brightness of G, the target maximum brightness Y of G is obtained max_G According to the original color coordinates and original brightness of RGB corresponding to the original color gamut and the target color coordinates and third brightness of B, the target maximum brightness Y of B is obtained. max_B According to the target color coordinates and target maximum brightness of RGB and the target color coordinates and target brightness of W, the target brightness gain M of RGB is obtained. R 、M G 、M B , where the first brightness, the second brightness, and the third brightness are assumed intermediate values; the target maximum brightness is the maximum brightness after the original RGB is mixed to the RGB target color point. This ensures that the brightness of W obtained by the RGB combined light after color gamut adjustment is equal to the target brightness of W.

[0169] In this embodiment, it is assumed that the first brightness, the second brightness, and the third brightness are all 100; the original brightness color points of RGB are R(Y1, x1, y1), G(Y2, x2, y2), and B(Y3, x3, y3); the target brightness color points of RGB are R(Y' RT , x RT ,y RT ),G(Y' GT , x GT ,y GT ),B(Y' BT , x BT ,y BT ), where Y' RT 、Y' GT 、Y' BT The values ​​are all 100, then the target maximum brightness Y of R max_R The calculation method of M is as follows: 01 =y1*((x RT -x3)*y2-(y RT -y3)*x2+x3*y RT -x RT *y3) / (y RT *((x3-x2)*y1+(x2-x1)*y3+(x1-x3)*y2)) M 02=-y2*((x RT -x3)*y1-(y RT -y3)*x1+x3*y RT -x RT *y3) / (y RT *((x3-x2)*y1+(x2-x1)*y3+(x1-x3)*y2)) M 03 =y3*((x2-x1)*y RT -(y2-y1)*x RT +x1*y2-x2*y1) / (y RT *((x2-x1)*y3-(y2-y1)*x3+x1*y2-x2*y1)) M1=M 01 *Y' RT / Y1 M2=M 02 *Y' RT / Y2 M3=M 03 *Y' RT / Y3 M max =max(M1, M2, M3) Y max_R =M1 / M max *Y1+M2 / M max *Y2+M3 / M max *Y3

[0170] Similarly, the target maximum brightness Y of GB can be calculated max_G 、Y max_B , just change the target brightness color point (Y' RT , x RT ,y RT ) is replaced by the target brightness color point (Y' GT , x GT ,y GT ), B(Y' BT , x BT ,y BT ) Then replace the original RGB brightness color point R(Y1, x1, y1), G(Y2, x2, y2), B(Y3, x3, y3) in the above formula with the target maximum brightness color point R(Y max_R , x RT ,y RT ),G(Y max_G , x GT ,y GT ),B(Y max_B , x BT ,y BT ), the target brightness color point of R (Y' RT , x RT ,y RT) is replaced by the target brightness color point (Y WT , x WT ,y WT ), we can get the target brightness gain M of RGB R 、M G 、M B .

[0171] Furthermore, the target brightness gain M of RGB can be used. R 、M G 、M B Get the actual target brightness Y of RGB RT 、Y GT 、Y BT , where Y RT =M R *Y max_R , Y GT =M G *Y max_G , Y BT =M B *Y max_B .

[0172] In some other embodiments, the target brightness gain of RGB may also be set to a value between 0-2.

[0173] 3. Calculate the CMY target color coordinates.

[0174] Assuming the tristimulus values ​​are XYZ, the target XYZ values ​​of RGB can be calculated based on the target Yxy values ​​of RGB. Then, the target XYZ values ​​of CMY can be calculated based on the target XYZ values ​​of RGB. Finally, the target Yxy values ​​of CMY can be calculated based on the target XYZ values ​​of CMY. The formula for calculating the Yxy value based on the XYZ value is as follows:

[0175] x=X / (X+Y+Z), y=Y / (X+Y+Z);

[0176] The formula for calculating the XYZ value based on the Yxy value is as follows:

[0177] X=(x / y)Y, Z=((1-xy) / y)Y;

[0178] The XYZ value is consistent with the Y value in the Yxy value.

[0179] The following relationship exists between the target XYZ values ​​of CMY and RGB: CT =X GT +X BT , Y CT =Y GT +Y BT , Z CT =ZGT +Z BT ; X MT =X RT +X BT , Y MT =Y RT +Y BT , Z MT =Z RT +Z BT ; X YT =X RT +X GT , Y YT =Y RT +Y GT , Z YT =Z RT +Z GT ;

[0180] Among them, X CT 、Y CT 、Z CT are the target XYZ values ​​of C; MT 、Y MT 、Z MT are the target XYZ values ​​of M; X YT 、Y YT 、Z YT are the target XYZ values ​​for Y; RT 、Y RT 、Z RT are the target XYZ values ​​of R; X GT 、Y GT 、Z GT are the target XYZ values ​​of G; X BT 、Y BT 、Z BT are the target XYZ values ​​of B respectively.

[0181] Alternatively, the target brightness gain of CMY may be equal to the ratio of the target brightness of each color to the sum of the target brightness of the two colors forming the light, such as M C =Y CT / (Y GT +Y BT ), M M =Y MT / (Y RT +Y BT ), M Y =Y YT / (Y RT +Y GT ).

[0182] S1002: Control the light modulation device according to original parameters and target parameters, where the original parameters include original color coordinates and original brightness ratio of RGBW corresponding to the original color gamut.

[0183] After obtaining the target parameters, the color gamut adjustment module 212 may send the original parameters and the target parameters to the control module 213 so that the control module 213 can control the light modulation device to achieve color gamut control and improve color accuracy.

[0184] As shown in FIG11 , the projection light engine may further include a mode switching module 211 for determining a target display mode. The mode switching module 211 may select a corresponding display mode as needed or determine the target display mode according to a user's selection instruction. In different display modes, the timing of the light source light generated by the light source system 201 may also be different. For example, when the target display mode is mode 1, the emission time of the first primary color light coincides with the emission time of the first stimulated light, the emission time of the second primary color light and the first stimulated light do not overlap with the emission time of the first primary color light, and the emission time of the second primary color light does not overlap with the emission time of the first stimulated light. When the target display mode is mode 2, the emission time of the first primary color light is greater than, less than, or equal to the emission time of the first stimulated light, and the emission time of the first primary color light at least partially overlaps with the emission time of the first stimulated light, the emission time of the second primary color light and the stimulated light at least partially overlaps with the emission time of the first primary color light, and the emission time of at least two of the first primary color light, the second primary color light, and the first stimulated light at least partially overlap, thereby meeting different display requirements. For example, assuming that the first primary color light is red laser, the first stimulated light is yellow fluorescence or red fluorescence, the second primary color light is green laser, and the first exciting light is blue laser, the timing corresponding to mode one may include but is not limited to that shown in Figure 15, and the timing corresponding to mode two may include but is not limited to that shown in Figure 16 or Figure 17, and the switching between mode one and mode two only requires adjusting the lighting time of the corresponding light source.

[0185] Optionally, the light source also includes a second stimulated light, the second stimulated light has the same color as the second primary light, or the spectrum of the second stimulated light at least includes the spectrum of the second primary light; when the target display mode is mode 1, the emission time of the second primary light is consistent with the emission time of the second stimulated light; when the target display mode is mode 2, the emission time of the second primary light is greater than, less than, or equal to the emission time of the second stimulated light, and the emission time of the second primary light at least partially overlaps with the emission time of the second stimulated light. For example, assuming that the first primary light is a red laser, the first stimulated light is yellow fluorescence or red fluorescence, the second primary light is a green laser, the first excitation light is a blue laser, and the second stimulated light is green fluorescence, then the timing corresponding to mode 1 may include but is not limited to that shown in Figure 18, and the timing corresponding to mode 2 may include but is not limited to that shown in Figure 19, Figure 20, or Figure 21.

[0186] Optionally, the light source also includes a second excitation light, which has the same color as the first excitation light; when the target display mode is mode 1, the emission time of the second excitation light is within the emission time of the excitation light; when the target display mode is mode 2, the emission time of the second excitation light is within the emission time of at least one of the first primary color light, the first excited light, the second primary color light, the first excitation light, and the second excited light. For example, assuming that the first primary color light is a red laser, the first excited light is a red fluorescent light or a yellow fluorescent light, the second primary color light is a green laser, the first excitation light is a blue laser, the second excited light is a green fluorescent light, and the second excitation light is a blue laser, then the timing corresponding to mode 1 is shown in FIG. 22, and the timing corresponding to mode 2 may include, but is not limited to, FIG. 23 or FIG. 24.

[0187] It should be understood that when the light source light simultaneously includes the first primary color light, the first stimulated light, the second primary color light, the first excitation light, the second stimulated light and the second excitation light, assuming that the first primary color light is red light, the second primary color light is green light, the first excitation light is blue light, and the second excitation light is blue light, then the red light in the above step S1001 is composed only of the first primary color light and / or the first stimulated light, the green light is composed only of the second primary color light and / or the second stimulated light, and the blue light is composed only of the first excitation light and / or the second excitation light.

[0188] Optionally, when the target display mode is mode 2, when calculating the target color coordinates and target brightness gain of CMY in the above step S1001, the original color coordinates and original brightness of the corresponding mixed light can also be considered to further improve the accuracy of color gamut adjustment. For example, the target color coordinates of yellow light are obtained based on the target color coordinates and target brightness of red light and green light and the original color coordinates and original brightness of the first mixed light. The first mixed light is the mixed light obtained when the light source generating red light and the light source generating green light are lit at the same time, such as the overlapping part of the emission time of the first primary color light and the second primary color light shown in Figure 23; for example, the target color coordinates of cyan light are obtained based on the target color coordinates and target brightness of green light and blue light and the original color coordinates and original brightness of the second mixed light. The second mixed light is the mixed light obtained when the light source generating green light and the light source generating blue light are lit at the same time, such as the overlapping part of the emission time of the second primary color light and the first excitation light shown in Figure 23.

[0189] In some embodiments, in order to avoid the laser being lit for a long time and causing heat accumulation, the lighting time of the light source can be divided into two segments in each lighting cycle, such as dividing the lighting cycle into the first sub-period and the second sub-period, and controlling the lighting time of the corresponding light source in one lighting cycle to be distributed in the first sub-period and the second sub-period as needed, and the lighting time distributed in the first sub-period and the second sub-period is discontinuous; and the lighting time of all light sources in two adjacent lighting cycles is discontinuous. Furthermore, the duration of each lighting of all light sources is greater than or equal to 9% of the duration of a lighting cycle to ensure the lighting time each time. For example, for 4K, the general requirement is 240HZ, corresponding to 4.167ms. Conventionally, RGB is lit once each, but in order to solve the problem of heat accumulation, it is split into lighting 2 times or more to improve the efficiency of the laser and extend the life of the laser.

[0190] When the display mode is mode 1, the laser and phosphor of the same color are completely synchronized and the output time is completely consistent. The lighting time of each light source is shown in FIG25. In the embodiment of the present invention, in the light source system shown in FIG4, R LD represents the red laser in the first light source 01, G LD represents the green laser in the first light source 01, B1 LD represents the blue laser in the first light source 01, B2 LD represents the second light source 02, A1 represents the sub-period when B1 LD excites to generate red fluorescence, B1 represents the sub-period when B1 LD excites to generate green fluorescence, C1 represents the sub-period when B1 LD generates blue laser, A2 represents the sub-period when B2 LD excites to generate red fluorescence, B2 represents the sub-period when B2 LD excites to generate green fluorescence, and C2 represents the sub-period when B2 LD generates blue laser. In this way, better red, green and blue pure color brightness can be obtained, and the screen display brightness is high. When the display mode is mode 2, through the laser light source whose driving time can be independently controlled, two or more colors of laser light sources are simultaneously lit at certain moments on the basis of mode 1, thereby greatly improving the white field brightness. Among them, R LD and G LD can control the timing separately, while B1 LD is used to excite fluorescence and generate blue light. B2 LD serves as a supplementary blue laser. It can have exactly the same timing as B1 LD, or it can be controlled separately to excite only two or one type of light, or to generate only one type of light. In this case, different brightness can be adjusted to reduce power consumption. Different color gamuts and brightness can also be obtained by adjusting the current, as shown in Figures 26 to 30.

[0191] In the light source system shown in FIG4 , the red laser and the green laser in the first primary color light source 01 can be used to generate the first primary color light and the second primary color light described above. The blue laser in the first light source 01 and / or the second light source 02 can be used to generate excitation light. This excitation light illuminates the first excitation region of the light conversion element 09 to obtain the first excited light described above, illuminates the second excitation region of the light conversion element 09 to obtain the second excited light described above, and illuminates the reflective region of the light conversion element 09 to obtain the first excitation light described above. The second light source 02 can be used to generate the second excitation light described above. In other embodiments, the reflective region can also be replaced with an excitation region provided with cyan powder.

[0192] In some embodiments, the excitation area of ​​the light conversion element 09 may only include a yellow fluorescent area or a green fluorescent area. When the display mode is mode one, the lighting time of each light source when the second light source 02 is not included is shown in Figure 30, and the lighting time of each light source when the second light source 02 is included is shown in Figure 31; when the display mode is mode two, the lighting time of each light source when the second light source 02 is not included is shown in Figure 32 or Figure 33, and the lighting time of each light source when the second light source 02 is included is shown in Figures 34-36.

[0193] Because the light conversion element 09 is fixedly partitioned, pure laser light is typically used to match the fluorescence. By adjusting the duration of the red and / or green lasers in the first light source 01, and / or the second light source 02, different modes can be compatible within the same device. For example, switching from Mode 2 (Figure 26) to Mode 1 (Figure 25) simply requires shortening the R LD and G LD lighting durations. Similarly, switching from Mode 1 (Figure 30) to Mode 2 (Figure 32) simply requires increasing the R LD lighting duration.

[0194] In some embodiments, to avoid long-term laser lighting and heat accumulation, the lighting time of the laser light source can be divided into two segments within each lighting cycle. For example, the lighting cycle can be divided into a first sub-period and a second sub-period. During the first sub-period, the RGB LD is lit in sequence, and the lighting time of the RGB LD is greater than or equal to 9% of the length of a lighting cycle. During the second sub-period, if the display mode is mode one, the RGB LD is still lit in sequence. If the display mode is mode two, two or three colors of LD are lit simultaneously during certain periods within the second sub-period to avoid heat accumulation and improve the efficiency and life of the laser. It should be understood that when the display mode is mode two, two or three colors of LD can also be lit simultaneously during certain periods within the two sub-periods.

[0195] It should be noted that the corresponding transmission function in the above embodiments can be changed to reflection, and the reflection function can be changed to transmission, which does not affect the functional realization of the overall optical path and will not be described in detail in the embodiments of the present invention.

[0196] In some embodiments, the projection device further includes a central controller 103 with one or more processing cores. This central controller can be a CPU, ARM, MCU, or other controller. Central controller 103 serves as the control center of the projection device, connecting various components of the entire projection device using various interfaces and circuits. It can run or execute software programs and / or operating systems stored in memory 104, as well as access data stored in memory 104. Alternatively, image processor 101 and central controller 103 can be integrated into a single processor.

[0197] In some embodiments, the projection device further includes one or more computer-readable storage media memory 104, an input module 105, a communication module 106, a power supply 107, and other components. Those skilled in the art will appreciate that the projection device structure shown in FIG10 does not limit the projection device, and may include more or fewer components than shown, or combine certain components, or arrange the components differently. Among them:

[0198] The memory 104 can be used to store software programs and an operating system. The central controller 103 executes various functional applications and data processing by running the software programs and operating system stored in the memory 104. The memory 104 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area may store data generated based on the use of the projection device. In addition, the memory 104 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 104 may also include a memory controller to provide the central controller 103 with access to the memory 104.

[0199] The projection device may further include an input module 105, which may be configured to receive input digital or character information and generate remote control, keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0200] The projection device may also include a communication module 106. In some embodiments, the communication module 106 may include a wireless module. The projection device may utilize the wireless module 106 to perform short-range wireless transmission, thereby providing a user with wireless broadband Internet access. For example, the communication module 106 may be used to facilitate user access to streaming media.

[0201] The projection device also includes a power supply 107 for supplying power to various components. In some embodiments, the power supply 107 can be logically connected to the central controller 103 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The power supply 107 can also include one or more DC or AC power supplies, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and other arbitrary components.

[0202] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items. The character " / " herein generally indicates that the objects associated before and after are in an "or" relationship.

[0203] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A light source system, characterized in that: The light source system includes a light source component, a light guide component, a light combining component, a light conversion element and a light homogenizing element, wherein the light conversion element includes at least one excitation region, and the light source component can emit excitation light and at least one primary color light; When the light source component emits excitation light and / or target primary color light, the excitation light is emitted into the target excitation area through the light guide component, the target excitation area is excited to generate target stimulated light, and the target stimulated light is guided by the light guide component and emitted into the light combining component; The target primary color light is guided to the light combining component by the light guide component, combined with the target stimulated light incident on the light combining component, and then incident on the light homogenizing component, and then emitted after being homogenized by the light homogenizing component; Alternatively, the target primary color light or the target stimulated light is guided to the light homogenizing element via the light guiding component and / or the light combining component, and is emitted after being homogenized by the light homogenizing element, the target primary color light is any one of the at least one primary color light, and the target excitation area is any excitation area of ​​the at least one excitation area.

2. The light source system according to claim 1, characterized in that: The light conversion element includes a reflective region; When the light source component emits excitation light, the excitation light is emitted into the reflection area through the light guide component, and the excitation light reflected by the reflection area is guided by the light guide component into the light combining component, and is guided by the light combining component to the light homogenizing element, and then emitted after being homogenized by the light homogenizing element.

3. The light source system according to claim 1, characterized in that: The light source assembly includes a first light source and / or a second light source; The excitation light includes a first excitation light generated by the first light source or a second excitation light generated by the second light source; Alternatively, the light source assembly further includes a light splitting and combining assembly, wherein the first light source generates the first excitation light, and the second light source generates the second excitation light, and the light is combined into the excitation light by the light splitting and combining assembly.

4. The light source system according to claim 3, characterized in that: The light source assembly includes a first light source, a second light source and a light splitting and combining assembly, the first light source can generate a first primary color light, a second primary color light and the first excitation light, and the second light source can generate the second excitation light; The light-splitting and light-combining component includes a first light-splitting and light-combining element and a second light-splitting and light-combining element, the first primary color light is emitted through the first light-splitting and light-combining element and the second light-splitting and light-combining element, and the second primary color light is emitted through the second light-splitting and light-combining element; or, the first primary color light includes at least two beams of light, the light-splitting and light-combining component includes a light-splitting and light-combining element and a second light-splitting and light-combining element corresponding to the at least two beams of light, respectively, the at least two beams of light are emitted through the corresponding light-splitting and light-combining elements, or the at least two beams of light are emitted through the corresponding light-splitting and light-combining element and the second light-splitting and light-combining element, and the second primary color light is emitted through the second The first primary color light includes at least two beams of light, the light-splitting and light-combining component includes a first light-splitting and light-combining component and a second light-splitting and light-combining component, the at least two beams of light are emitted through the first light-splitting and light-combining component, and the second primary color light is emitted through the first light-splitting and light-combining component and the second light-splitting and light-combining component; or, the first primary color light includes at least two beams of light, the light-splitting and light-combining component includes a first light-splitting and light-combining component, a second light-splitting and light-combining component and a third light-splitting and light-combining component, the at least two beams of light are emitted through the first light-splitting and light-combining component, and part of the light in the second primary color light is emitted by the second light-splitting and light-combining component. After being reflected by the photosynthetic light combining element, a portion of the light is emitted through the first photosynthetic light combining element, another portion of the light is emitted through the second photosynthetic light combining element and then enters the third photosynthetic light combining element, and then is reflected by the third photosynthetic light combining element and then exits through the first photosynthetic light combining element; or, the first primary color light includes at least two light beams, the photosynthetic light combining component includes a photosynthetic light combining element, a second photosynthetic light combining element and a third photosynthetic light combining element corresponding to the at least two light beams, respectively, the at least two light beams are emitted through the corresponding photosynthetic light combining elements, a portion of the second primary color light is reflected by the second photosynthetic light combining element, another portion of the light is emitted through the second photosynthetic light combining element and then enters the third photosynthetic light combining element, and is reflected by the third photosynthetic light combining element, and the second primary color light reflected by the second photosynthetic light combining element and the third photosynthetic light combining element is emitted through the photosynthetic light combining elements corresponding to the at least two light beams; The light-splitting and light-combining component also includes a fourth light-splitting and light-combining element, and the first excitation light and the second excitation light are combined at the fourth light-splitting and light-combining element and then emitted; or, the light-splitting and light-combining component also includes a fourth light-splitting and light-combining element and a fifth light-splitting and light-combining element, and the first excitation light enters the fourth light-splitting and light-combining element after passing through the fifth light-splitting and light-combining element, and is combined with the second excitation light at the fourth light-splitting and light-combining element and then emitted.

5. The light source system according to claim 3, characterized in that: The wavelength of the first excitation light is within a first wavelength range, and the wavelength of the second excitation light is within a second wavelength range; and / or the polarization state of the first excitation light is a first polarization state, and the polarization state of the second excitation light is a second polarization state; Alternatively, the first excitation light is light of a first polarization state in a target wavelength band, and the second excitation light is light of a second polarization state in the target wavelength band.

6. The light source system according to claim 1, characterized in that: The light guide assembly includes a light guiding element and a first focusing lens group, and the light combining assembly includes a first light combining element; The excitation light emitted by the light source assembly is incident on the target excitation area of ​​the light conversion element through the light guiding element and the first focusing lens group, the target excitation area is excited by the excitation light to generate target stimulated light, and the target stimulated light is incident on the first light combining element through the first focusing lens group and the light guiding element; The target stimulated light is incident on the light homogenizing element via the first light combining element; or the target primary color light emitted by the light source assembly is incident on the first light combining element and is combined with the target stimulated light incident on the first light combining element and then is incident on the light homogenizing element.

7. The light source system according to claim 6, characterized in that: The excitation light emitted by the light source assembly is incident into the reflection area of ​​the light conversion element through the light guiding element and the first focusing lens group; The light combining component also includes a second light combining element. The excitation light reflected by the reflection area is incident on the first light combining element through the first focusing lens group and the light guiding element. The first light combining element reflects part of the excitation light and transmits another part of the light. The reflected part of the excitation light is incident on the light homogenizing element, and the transmitted part of the excitation light is incident on the second light combining element. After being reflected by the second light combining element, the excitation light is incident on the The first light combining element is incident on the light homogenizing element through the first light combining element; Alternatively, the light combining component further includes an adjustable element, the excitation light reflected by the reflection area enters the first light combining element through the first focusing lens group and the light guiding element, enters the adjustable element through the first light combining element, enters the first light combining element after being reflected by the adjustable element, and enters the light homogenizing element through the first light combining element; Alternatively, the light guiding component also includes an adjustable element, and the excitation light reflected by the reflection area enters the adjustable element through the first focusing lens group and the light guiding element, is reflected back to the light guiding element through the adjustable element, enters the first light combining element through the light guiding element, and is reflected or transmitted to the light homogenizing element through the first light combining element.

8. The light source system according to claim 6, characterized in that: The at least one primary color light includes a first primary color light and a second primary color light, the wavelength of the second primary color light is within a preset wavelength band and the polarization state is a target polarization state, and the first light combining element reflects or transmits the target stimulated light and the excitation light, and transmits or reflects the first primary color light and the second primary color light; Alternatively, the first light combining element includes a target area; the target area transmits or reflects the target primary color light, and an area other than the target area in the first light combining element reflects or transmits the target stimulated light; Alternatively, the at least one primary color light includes a first primary color light and a second primary color light, and the at least one excitation zone includes a first excitation zone and a second excitation zone; the first light combining element transmits or reflects the first primary color light, and reflects or transmits the stimulated light generated by the first excitation zone; the first light combining element includes a target area, the target area transmits or reflects the second primary color light, and the area other than the target area in the first light combining element reflects or transmits the stimulated light generated by the second excitation zone.

9. The light source system according to claim 6, characterized in that: The excitation light emitted by the light source assembly enters the first focusing lens group from one end of the light guiding element away from the first light combining element, and the main light ray of the excitation light emitted from the light source assembly to the first focusing lens group does not overlap with the main light ray of the target stimulated light and the excitation light emitted from the light conversion element to the first focusing lens group.

10. The light source system according to claim 1, characterized in that: The light combining assembly includes a first light combining element and a second light combining element; The excitation light emitted by the light source component is incident on the target excitation area of ​​the light conversion element through the light guide component, the target excitation area is excited by the excitation light to generate target stimulated light, and the target stimulated light is incident on the first light combining element; The target stimulated light is incident on the light homogenizing element via the first light combining element; or the target primary color light emitted by the light source assembly is incident on the second light combining element, and after being combined by the second light combining element with the target stimulated light incident on the first light combining element, is incident on the light homogenizing element.

11. The light source system according to claim 1, characterized in that: The light guide assembly includes a first diffusion element or a second focusing lens group; The target primary color light emitted by the light source assembly is focused by the second focusing lens group and then emitted into the light combining assembly; Alternatively, the target primary color light emitted by the light source assembly is diffused by the first diffusion element and then incident on the light combining assembly.

12. The light source system according to claim 1 or 11, characterized in that: A shaping and expanding lens group and / or a second diffusion element are arranged between the light combining component and the light homogenizing element, and the second diffusion element includes at least one diffusion area; Alternatively, the light conversion element includes at least one diffusion region; Among them, at least one of the excitation light and the target primary color light incident on the light combining component is diffused by the at least one diffusion area and then incident on the light homogenizing element.

13. The light source system according to claim 12, characterized in that: The at least one diffusion region includes a first diffusion region, a second diffusion region and a third diffusion region; the at least one primary color light includes a first primary color light and a second primary color light; the at least one excitation region includes a first excitation region and / or a second excitation region; The first primary color light is diffused by the first diffusion area and then incident on the light homogenizing element; the second primary color light is diffused by the second diffusion area and then incident on the light homogenizing element; the excitation light is diffused by the third diffusion area and then incident on the light homogenizing element.

14. The light source system according to claim 13, characterized in that: The diffusion half angle of the first diffusion region is a first angle, the diffusion half angle of the second diffusion region is a second angle, and the diffusion half angle of the third diffusion region is a third angle.

15. The light source system according to claim 12, characterized in that: At least one of the excitation light and the target primary color light is diffused by the at least one diffusion zone and then incident on the light homogenizing element. The incident angle of the main light when incident on the light homogenizing element is within the target angle range so as to be reflected multiple times in the light homogenizing element.

16. The light source system according to claim 12, characterized in that: When the light emitted by the light source system includes the stimulated light emission of the target, moving the second diffusion element out of the light path; Alternatively, the light conversion element or the second diffusion element includes a transmission area, and when the light emitted by the light source system includes the target stimulated light emission, the transmission area of ​​the light conversion element or the second diffusion element is placed in the light path.

17. The light source system according to claim 1, characterized in that: The light source assembly can emit a first primary color light, a second primary color light and an excitation light; The light conversion element includes a first excitation area and / or a second excitation area and a reflection area; the light source system emits the first primary color light or the first primary color light and the stimulated light generated by the first excitation area, the first primary color light or the first primary color light and the second primary color light and the stimulated light generated by the second excitation area, the first primary color light and the second primary color light, the any one of the second primary color light or the first primary color light and the second primary color light combined with the stimulated light generated by the first excitation zone, the second primary color light or the second primary color light combined with the stimulated light generated by the second excitation zone, the second primary color light or the second primary color light and the stimulated light generated by the second excitation zone and the excitation light, the excitation light; Alternatively, the light conversion element only includes a target excitation zone; the light source system sequentially emits the first primary light or a combined light of the first primary light and the stimulated light generated by the target excitation zone, the second primary light or a combined light of the first primary light and the second primary light and the stimulated light generated by the target excitation zone, any one of a combined light of the first primary light and the second primary light, the second primary light or a combined light of the second primary light and the stimulated light generated by the target excitation zone, a combined light of the second primary light and the excitation light, and the excitation light.

18. The light source system according to claim 1, characterized in that: The excitation light includes a first excitation light and / or a second excitation light, and the light-emitting chip corresponding to the first excitation light and / or the second excitation light is packaged as a whole with the light-emitting chip corresponding to any one or all of the at least one primary color light.

19. The light source system according to claim 1, characterized in that: The light source assembly includes a first light source and a dynamic adjustment element, the first light source can generate a first excitation light, and the excitation light includes the first excitation light; The first light source emits a first excitation light, and when the dynamic adjustment element is in a first state, the first excitation light is guided to the target excitation area by the dynamic adjustment element and the light guide component; The first light source emits a first excitation light. When the dynamic adjustment element is in the second state, the first excitation light is guided by the dynamic adjustment element, the light guide component and / or the light combining component to the light homogenizing element, and is emitted after being homogenized by the light homogenizing element.

20. The light source system according to claim 2, characterized in that: The reflection area is any one of a reflector, a polished metal layer or metal plate, a substrate coated with a reflection film, particles with diffuse reflection, a microstructured reflection layer, and a reflective diffuser.

21. A projection device, characterized in that: A light source system comprising any one of claims 1-20.

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