Light source system and projection device

Abstract

The application relates to the technical field of display, and discloses a light source system and a projection device; the light source system mixes and combines primary color light (such as laser) and excited light (such as fluorescent light), can combine the advantages of the two kinds of light, greatly improves the comfort of human eyes, avoids the color edge problem of laser, has a higher color gamut, and improves contrast, so that the picture quality of the projection device can be improved; and the light combination mode is compatible with various configurations, realizes a larger range of brightness, and improves the compatibility of the projection device.

Description

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

[0002] In a projection display product, a light source system is a very important component, which is used to convert light beams of different colors, different angular distributions, different brightnesses and different shapes into uniform light spots irradiated to an effective area of a display chip.

[0003] In the field of projection display, traditional light bulbs are less and less used due to their own defects, while new light sources such as LEDs, phosphor and lasers gradually become the mainstream of light sources for projection display, showing excellent characteristics in brightness, color, service life, energy consumption and the like. Among these new light source technologies, it is difficult for LED light sources to achieve high brightness, and laser light sources have speckle problems. Therefore, how to achieve high brightness and high-quality image is a problem to be solved. SUMMARY

[0004] The present application provides a light source system which can be used in a projection device, and can improve the brightness and color gamut of the light source system, thereby improving the image quality of the projection device.

[0005] In a first aspect, the present application provides a light source system, which comprises a light source assembly, a light guide assembly, a light combination assembly, a light conversion element and a light uniformization element. The light conversion element comprises at least one excitation region. The light source assembly can emit excitation light and at least one primary color light.

[0006] When the light source assembly emits excitation light and / or target primary color light, the excitation light is emitted into the target excitation region through the light guide assembly. The target excitation region is excited to generate target stimulated light. The target stimulated light is guided into the light combination assembly through the light guide assembly.

[0007] The target primary color light is guided into the light combination assembly through the light guide assembly, and the target stimulated light is guided into the light combination assembly. After the target primary color light and the target stimulated light are combined in the light combination assembly, the combined light is emitted into the light uniformization element. After the combined light is uniformly lightened in the light uniformization element, the combined light is emitted. The target primary color light is any one of the at least one primary color light, and the target excitation region is any one of the at least one excitation region.

[0008] In some embodiments, the light conversion element comprises a reflection region.

[0009] When the light source assembly emits excitation light, the excitation light is emitted into the reflection region through the light guide assembly. The excitation light reflected by the reflection region is guided into the light combination assembly through the light guide assembly. The excitation light is guided into the light uniformization element through the light combination assembly. After the excitation light is uniformly lightened in the light uniformization element, the excitation light is emitted.

[0010] In some embodiments, the light source assembly comprises the first light source and / or the second light source;

[0011] The excitation light comprises the first excitation light generated by the first light source or the second excitation light generated by the second light source;

[0012] Alternatively, the light source assembly further comprises a light splitting and combining assembly, the first light source generates the first excitation light, and the second light source generates the second excitation light, and the light splitting and combining assembly combines the first excitation light and the second excitation light to generate the excitation light.

[0013] In some embodiments, the light source assembly comprises the first light source, the second light source and the light splitting and combining assembly, the first light source is capable of generating the first primary color light, the second primary color light and the first excitation light, and the second light source is capable of generating the second excitation light;

[0014] The light splitting and combining assembly comprises the first light splitting and combining element and the second light splitting and combining element, the first primary color light is emitted through the first light splitting and combining element and the second light splitting and combining element, and the second primary color light is emitted through the second light splitting and combining element; or the first primary color light comprises at least two beams of light, the light splitting and combining assembly comprises the first light splitting and combining element, the second light splitting and combining element and the third light splitting and combining element corresponding to the at least two beams of light respectively, the at least two beams of light are emitted through the corresponding first light splitting and combining element or the at least two beams of light are emitted through the corresponding first light splitting and combining element and the second light splitting and combining element, and the second primary color light is emitted through the second light splitting and combining element; or the first primary color light comprises at least two beams of light, the light splitting and combining assembly comprises the first light splitting and combining element and the second light splitting and combining element, the 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; or the first primary color light comprises at least two beams of light, the light splitting and combining assembly comprises the first light splitting and combining element, the second light splitting and combining element and the third light splitting and combining element, the at least two beams of light are emitted through the first light splitting and combining element, part of 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 another part of the second primary color light is transmitted through the second light splitting and combining element and then emitted into the third light splitting and combining element, reflected by the third light splitting and combining element and then emitted through the first light splitting and combining element; or the first primary color light comprises at least two beams of light, the light splitting and combining assembly comprises the first light splitting and combining element, the second light splitting and combining element and the third light splitting and combining element corresponding to the at least two beams of light respectively, the at least two beams of light are emitted through the corresponding first light splitting and combining element, part of the second primary color light is reflected by the second light splitting and combining element, another part of the second primary color light is transmitted through the second light splitting and combining element and then emitted into the third light splitting and combining element, reflected by the third light splitting and combining element, and the second primary color light reflected by the second light splitting and combining element and the third light splitting and combining element is emitted through the first light splitting and combining element corresponding to the at least two beams of light respectively;

[0015] The light splitting and combining assembly further comprises 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 exit; or, the light splitting and combining assembly further comprises a fourth light splitting and combining element and a fifth light splitting and combining element, the first excitation light passes through the fifth light splitting and combining element and then enters the 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 exit.

[0016] In some embodiments, the wavelength of the first excitation light is in a first wavelength range, the wavelength of the second excitation light is in a second wavelength range, and the excitation efficiency of the second excitation light in exciting the target excitation region to generate the target excited light is higher than the corresponding excitation efficiency of 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.

[0017] Alternatively, the first excitation light is light of a first polarization state in a target wavelength range, and the second excitation light is light of a second polarization state in the target wavelength range.

[0018] In some embodiments, the light guide assembly comprises a light guide element and a first focusing lens group, and the light splitting and combining assembly comprises a first light combining element.

[0019] The excitation light emitted by the light source assembly passes through the light guide element and the first focusing lens group and enters the target excitation region of the light conversion element, the target excitation region is excited by the excitation light to generate the target excited light, and the target excited light passes through the first focusing lens group and the light guide element and enters the first light combining element.

[0020] The target excited light passes through the first light combining element and enters the light homogenizing element; or, the target base color light emitted by the light source assembly enters the first light combining element, and the target excited light and the target base color light are combined in the first light combining element and then enter the light homogenizing element.

[0021] In some embodiments, the excitation light emitted by the light source assembly passes through the light guide element and the first focusing lens group and enters the reflection region of the light conversion element.

[0022] The light splitting and combining assembly further comprises a second light combining element, the excitation light reflected by the reflection region passes through the first focusing lens group and the light guide element and enters the first light combining element, part of the excitation light is reflected by the first light combining element and another part of the excitation light is transmitted, 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, is reflected by the second light combining element and then enters the first light combining element, and passes through the first light combining element and enters the light homogenizing element.

[0023] Alternatively, the light splitting and combining assembly further comprises an adjustable element, the excitation light reflected by the reflection region passes through the first focusing lens group and the light guide element and enters the first light combining element, passes through the first light combining element and enters the adjustable element, is reflected by the adjustable element and then enters the first light combining element, and passes through the first light combining element and enters the light homogenizing element.

[0024] Or, the light guide assembly further comprises an adjustable element, the excitation light reflected by the reflection region is incident into the adjustable element through the first focusing lens set and the light guide element, is reflected back to the light guide element through the adjustable element, is incident into the first light combination element through the light guide element, and is reflected or transmitted to the light homogenizing element through the first light combination element.

[0025] In some embodiments, the at least one primary color light comprises a first primary color light and a second primary color light, the second primary color light has a wavelength within a preset wavelength range and a target polarization state, and the first light combination element reflects or transmits the target excited light, the excitation light, and transmits or reflects the first primary color light and the second primary color light.

[0026] Or, the first light combination element comprises a target region; the target region transmits or reflects the target primary color light, and the region outside the target region in the first light combination element reflects or transmits the target excited light.

[0027] Or, the at least one primary color light comprises a first primary color light and a second primary color light, and the at least one excitation region comprises a first excitation region and a second excitation region; the first light combination element transmits or reflects the first primary color light and reflects or transmits the excited light generated by the first excitation region; the first light combination element comprises a target region, the target region transmits or reflects the second primary color light, and the region outside the target region in the first light combination element reflects or transmits the excited light generated by the second excitation region.

[0028] In some embodiments, the excitation light emitted by the light source assembly is incident into the first focusing lens set from the end of the light guide element away from the first light combination element, and the chief rays of the excitation light emitted from the light source assembly to the first focusing lens set do not coincide with the chief rays of the target excited light and the excitation light emitted from the light conversion element to the first focusing lens set.

[0029] In some embodiments, the light combination assembly comprises a first light combination element and a second light combination element.

[0030] The excitation light emitted by the light source assembly is incident into the target excitation region of the light conversion element through the light guide assembly, the target excitation region is excited by the excitation light to generate the target excited light, and the target excited light is incident into the first light combination element.

[0031] The target excited light is incident into the light homogenizing element through the first light combination element, or the target primary color light emitted by the light source assembly is incident into the second light combination element, and the target excited light incident into the first light combination element after light combination through the second light combination element is incident into the light homogenizing element.

[0032] In some embodiments, the light guide assembly comprises a first diffusion element or a second focusing lens set.

[0033] The target primary color light emitted by the light source assembly is focused through the second focusing lens set and then is incident into the light combination assembly.

[0034] Alternatively, the target base color light emitted by the light source assembly is diffused by the first diffusion element and then enters the light combination assembly.

[0035] In some embodiments, a shaping and expanding lens group and / or a second diffusion element is arranged between the light combination assembly and the light homogenizing element, and the second diffusion element comprises at least one diffusion region.

[0036] Alternatively, the light conversion element comprises at least one diffusion region.

[0037] At least one of the excitation light and the target base color light entering the light combination assembly is diffused by the at least one diffusion region and then enters the light homogenizing element.

[0038] In some embodiments, the at least one diffusion region comprises a first diffusion region, a second diffusion region and a third diffusion region; the at least one base color light comprises a first base color light and a second base color light; and the at least one excitation region comprises a first excitation region and / or a second excitation region.

[0039] The first base color light is diffused by the first diffusion region and then enters the light homogenizing element; the second base color light is diffused by the second diffusion region and then enters the light homogenizing element; and the excitation light is diffused by the third diffusion region and then enters the light homogenizing element.

[0040] In some embodiments, the first diffusion region has a first diffusion half-angle, the second diffusion region has a second diffusion half-angle, and the third diffusion region has a third diffusion half-angle.

[0041] In some embodiments, at least one of the excitation light and the target base color light is diffused by the at least one diffusion region and then enters the light homogenizing element, and the chief ray of the light has an incident angle within a target angle range when entering the light homogenizing element, so as to be reflected multiple times in the light homogenizing element.

[0042] In some embodiments, when the light emitted by the light source system comprises target stimulated light, the second diffusion element is removed from the light path.

[0043] Alternatively, the light conversion element or the second diffusion element comprises a transmission region, and when the light emitted by the light source system comprises target stimulated light, the transmission region of the light conversion element or the second diffusion element is arranged in the light path.

[0044] In some embodiments, the light source assembly is capable of emitting a first base color light, a second base color light and excitation light.

[0045] The light conversion element comprises the first excitation region and / or the second excitation region and the reflection region; the light source system emits in time sequence any one of the first primary color light, 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 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 second primary color light, the combined light of the second primary color light and the stimulated light generated by the second excitation region, the combined light of the second primary color light and the excitation light, and the excitation light.

[0046] Alternatively, the light conversion element only comprises the target excitation region; the light source system emits in time sequence any one of the first primary color light, the combined light of the first primary color light and the stimulated light generated by the target excitation region, the combined light of the first primary color light and the second primary color light and the stimulated light generated by the target excitation region, the second primary color light, the combined light of the second primary color light and the stimulated light generated by the target excitation region, the combined light of the second primary color light and the excitation light, and the excitation light.

[0047] In some embodiments, the excitation light comprises the first excitation light and / or the second excitation light, and the light-emitting chip corresponding to the first excitation light and / or the second excitation light is packaged integrally with the light-emitting chip corresponding to any one or all of the primary colors.

[0048] In some embodiments, the light source assembly comprises the first light source and the dynamic adjustment element, the first light source is capable of generating the first excitation light, and the excitation light comprises the first excitation light.

[0049] The first light source emits the first excitation light, and when the dynamic adjustment element is in the first state, the first excitation light is guided by the dynamic adjustment element and the light guide assembly to the target excitation region.

[0050] The first light source emits the first excitation light, and when the dynamic adjustment element is in the second state, the first excitation light is guided by the dynamic adjustment element, the light guide assembly and / or the light combination assembly to the light uniformization element and is emitted after being uniformized by the light uniformization element.

[0051] In some embodiments, the reflection region is any one of a mirror, a polished metal layer or metal plate, a substrate coated with a reflective film, particles with diffuse reflection, a microstructure reflection layer, and a reflective diffuser.

[0052] In a second aspect, the present application provides a projection device comprising the light source system of any one of the first aspect and the possible implementation manners of the first aspect.

[0053] The light source system provided in the present application mixes and combines primary light (such as laser light) and excited light (such as fluorescent light), combines the advantages of the two types of light, greatly improves the eye comfort, avoids the color edge problem of laser light, has a high color gamut, and improves the contrast ratio, so that the image quality of the projection device can be improved; and the light combination mode is compatible with various configurations, realizes a large range of brightness, and improves the compatibility of the projection device. BRIEF DESCRIPTION OF DRAWINGS

[0054] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description of embodiments of the present application, when taken in conjunction with the accompanying drawings. The drawings provided in the present application are used to provide further understanding of the embodiments of the present application, and constitute a part of the specification, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation of the present application. In the drawings, the same reference numerals generally represent the same components or steps. Among them:

[0055] Figure 1 FIG. 1 is a structural schematic diagram of a light source assembly in an embodiment of the present application;

[0056] Figures 2-9 FIG. 2 is a structural schematic diagram of a light source system in various embodiments of the present application;

[0057] Figure 10 FIG. 3 is a structural schematic diagram of a projection device in an embodiment of the present application;

[0058] Figure 11 FIG. 4 is a structural schematic diagram of a projection light machine in an embodiment of the present application;

[0059] Figure 12 FIG. 5 is a flow schematic diagram of a display control method in an embodiment of the present application;

[0060] Figures 13-14 FIG. 6 is a schematic diagram of a method for determining a target color coordinate of RGB in various embodiments of the present application;

[0061] Figures 15-24 FIG. 7 is a schematic diagram of the exit time of each light in various embodiments of the present application;

[0062] Figures 25-36 FIG. 8 is a schematic diagram of the lighting time of each light source in various embodiments of the present application. DETAILED DESCRIPTION

[0063] In order 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 in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. It should be understood that the specific embodiments described herein are only used to explain the present application, and should not be used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the scope of protection of the present application. In addition, although the disclosure in the present application is introduced according to one or more examples, it should be understood that each aspect of the disclosure can also constitute a complete technical solution independently. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0064] In the embodiments of the present application, the words "exemplary", "for example", and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word exemplary is intended to present concepts in a concrete manner.

[0065] Unless otherwise defined, technical or scientific terms used in the present application should be understood as having the meaning commonly understood by one of ordinary skill in the art to which the present application belongs. The words "first", "second", and the like used in the present application do not represent any order, number, or importance, but are only used to distinguish the description. "Include" or "contain" and the like similar words mean that the elements or objects before the word cover 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.

[0066] In order to thoroughly understand the present application, a detailed description will be provided below in order to explain the technical solutions of the present application. The preferred embodiments of the present application are described in detail as follows, however, in addition to these detailed descriptions, the present application can also have other implementation manners.

[0067] The present application provides a light source system, the light source system comprising a light source assembly, a light guide assembly, a light combination assembly, a light conversion element and a light homogenization element, the light conversion element comprising at least one excitation region, the light source assembly being capable of emitting excitation light and at least one primary color light.

[0068] When the light source assembly emits excitation light and / or target base color light, the excitation light is incident on the target excitation area through the light guide assembly, the target excitation area is excited to generate target stimulated light, and the target stimulated light is guided to the light combination assembly through the light guide assembly; the target base color light is guided to the light combination assembly through the light guide assembly, and after the target base color light and the target stimulated light incident on the light combination assembly are combined, the combined light is incident on the light homogenizing element and then emitted after being homogenized by the light homogenizing element; or the target base color light or the target stimulated light is guided to the light homogenizing element through the light guide assembly and / or the light combination assembly, and then emitted after being homogenized by the light homogenizing element. The target base color light is any one of at least one base color light, and the target excitation area is any one of at least one excitation area.

[0069] The excitation area has a wavelength conversion material, which can be a fluorescent material or a fluorescent powder, etc. For example, it can be a yellow fluorescent material excited to emit yellow light, such as a yttrium aluminum garnet (YAG) fluorescent material containing cerium (Ce) as an activator; or a green fluorescent powder, a red fluorescent powder, a cyan fluorescent powder, an orange fluorescent powder, etc. Each excitation area can correspond to a wavelength conversion material and can generate at least one color light with a wavelength different from that of the excitation light, i.e., at least one color light with a wavelength different from that of the excitation light in the stimulated light, such as at least one of red fluorescence, green fluorescence, yellow fluorescence, cyan fluorescence, and orange fluorescence. For example, the target stimulated light can be any one of red fluorescence, green fluorescence, yellow fluorescence, cyan fluorescence, and orange fluorescence. For example, the at least one excitation area includes a first excitation area and a second excitation area, the first excitation area can generate red fluorescence or yellow fluorescence or orange fluorescence, and the second excitation area can generate green fluorescence. The stimulated light corresponding to the first excitation area can be red fluorescence or yellow fluorescence or orange fluorescence, and the stimulated light generated by the second excitation area can be green fluorescence.

[0070] The light homogenizing element can be a compound eye or a light rod, etc.

[0071] In some embodiments, the light source assembly includes a first light source or a second light source; the excitation light includes first excitation light generated by the first light source or second excitation light generated by the second light source.

[0072] The first light source and the first excitation light are not limited, and the second light source and the second excitation light are not limited; the first light source and the second light source can be LED light sources or laser LD light sources and other new light sources, or a mixed light source of LED light sources and laser LD light sources, etc. The number of light emitting chips in the first light source and the second light source is not limited, and 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 blue laser light or UV light, etc. For example, the first light source can be an LD light source, and the first excitation light can be blue laser light.

[0073] Optionally, the light source assembly comprises a first light source and a second light source, and the excitation light comprises 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 integrally with the light emitting chip corresponding to any one or all of the primary colors. For example, the first light source can be formed by packaging the light emitting chip corresponding to the first excitation light and all the primary colors integrally, and the first light source can be obtained by packaging the LD light emitting chip array, for example, a row of blue laser LD light emitting chips (blue laser), a row of green laser LD light emitting chips (green laser), and one or two rows of red laser LD light emitting chips (red laser) are packaged integrally. The compact structure of the packaged light source can reduce the volume of the projection device. Optionally, the first light source can generate at least one primary color; for example, the at least one primary color can be at least one of red laser, green laser, and blue laser. The at least one primary color can comprise a first primary color and a second primary color, and the first primary color and the second primary color are not limited, for example, the first primary color can be red laser, and the second primary color can be green laser.

[0074] Optionally, the first light source and the second light source can be two independent light sources, or can be packaged integrally. The compact structure of the packaged light source can reduce the volume of the projection device.

[0075] In some embodiments, the light source assembly further comprises a light splitting and light combining assembly, the first light source generates the first excitation light, and the second light source generates the second excitation light, and the light splitting and light combining assembly combines the first excitation light and the second excitation light into the excitation light.

[0076] Optionally, the first light source can generate a first primary color, a second primary color, and a first excitation light, and the second light source can generate a second excitation light. The light splitting and light combining manner in the light source assembly can include but is not limited to the following:

[0077] Manner one, the light splitting and light combining assembly comprises a first light splitting and light combining element and a second light splitting and light combining element, the first primary color 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 is emitted through the second light splitting and light combining element; the light splitting and light combining assembly further comprises 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 assembly further comprises a fourth light splitting and light combining element and a fifth light splitting and light combining element, the first excitation light is emitted through the fifth light splitting and light combining element and then enters the 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.

[0078] For example, Figure 1 is a structural schematic diagram of a light source assembly provided by the embodiment; for example, Figure 1As shown in (a) or (b), assume 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 optical splitter / combiner DM1, then passes through the second optical splitter / combiner DM2 before being emitted; the green laser is reflected by the second optical splitter / combiner DM2 before being emitted; the blue laser generated by the first light source 01 is reflected or transmitted by the fourth optical splitter / combiner DM4, and then combined with the blue laser generated by the second light source 02 after being transmitted or reflected by the fourth optical splitter / combiner DM4 before being emitted, or, as... Figure 1 As shown in (c), the blue laser generated by the first light source 01 is reflected by the fifth beam splitter / combiner DM5 and then enters the fourth beam splitter / combiner DM4. It combines with the blue laser generated by the transmitted first light source 02 at the fourth beam splitter / combiner DM4 before exiting. The first and fifth beam splitters / combiners can be reflective elements (mirrors, reflective coatings on the substrate, etc.), and the second beam splitter / combiner can be a dichroic element, possessing the characteristic of reflecting green laser and transmitting blue laser.

[0079] Method 2: The first primary color light includes at least two beams of light, and the beam splitting and combining assembly includes a beam splitting and combining element and a second beam splitting and combining element corresponding to the at least two beams of light. The at least two beams of light are emitted through the corresponding beam splitting and combining element or the at least two beams of light are emitted through the corresponding beam splitting and combining element and the second beam splitting and combining element. The second primary color light is emitted through the second beam splitting and combining element. The beam splitting and combining assembly also includes a fourth beam splitting and combining element. The first excitation light and the second excitation light are combined at the fourth beam splitting and combining element and then emitted.

[0080] For example, such as Figure 1 As shown in (d), assume that the first light source 01 generates two red laser beams, which are reflected by the beam splitter and combiner DM10 and the beam splitter and combiner DM11 respectively before being emitted, or as shown in (d). Figure 1 As shown in (e), the two generated red laser beams are reflected by beam splitters DM10 and DM11, respectively, and then emitted after passing through a second beam splitter DM2. The green laser beam is reflected by the second beam splitter DM2 and then emitted. The blue laser beam generated by the first light source 01 is reflected by the fourth beam splitter DM4 and then combined with the blue laser beam generated by the second light source 02 transmitted through the fourth beam splitter DM4 before being emitted. DM10 and DM11 can magnify the spot of the red laser beam, and DM2 can be a reflective concave mirror to focus the green laser beam.

[0081] Method 3: The first primary color light includes at least two beams of light, and the beam splitting and combining assembly includes a first beam splitting and combining element and a second beam splitting and combining element. At least two beams of light are emitted through the first beam splitting and combining element, and the second primary color light is emitted through the first beam splitting and combining element and the second beam splitting and combining element. The beam splitting and combining assembly also includes a fourth beam splitting and combining element. The first excitation light and the second excitation light are combined at the fourth beam splitting and combining element and then emitted.

[0082] For example, such as Figure 1 As shown in (f), assume that the first light source 01 generates two red laser beams, which are reflected by the first beam splitter and combiner DM1 and then emitted; the green laser beam is reflected by the second beam splitter and combiner DM2 and then emitted after passing through the first beam splitter and combiner DM1; the blue laser beam generated by the first light source 01 is reflected by the fourth beam splitter and combiner DM4 and then emitted after combining with the blue laser beam generated by the second light source 02 transmitted through the fourth beam splitter and combiner DM4.

[0083] Method 4: The first primary color light includes at least two beams of light. The light splitting and combining assembly 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. Another part of the light passes through the second light splitting and combining element and then enters the third light splitting and combining element. After being reflected by the third light splitting and combining element, it is emitted through the first light splitting and combining element.

[0084] For example, such as Figure 1 As shown in (g), two red laser beams generated by the first light source 01 are reflected by the first beam splitter and combiner DM1 before exiting. Part of the green laser beam is reflected by the second beam splitter and combiner DM2 before exiting through the first beam splitter and combiner DM1, while the other part passes through the second beam splitter and combiner DM2 and enters the third beam splitter and combiner DM3. After being reflected by the third beam splitter and combiner DM3, it exits through the first beam splitter and combiner DM1. The blue laser beam generated by the first light source 01 is reflected by the fourth beam splitter and combiner DM4, and then combined with the blue laser beam generated by the second light source 02 transmitted through the fourth beam splitter and combiner DM4 before exiting. The green laser beam can be enlarged by using DM2 and DM3, and then further incident into the homogenizing element. This increases the incident angle and the number of reflections within the homogenizing element, thereby reducing speckle in the projection device.

[0085] Method 5: The first primary color light includes at least two beams of light. The beam splitting and combining assembly includes a beam splitting and combining element, a second beam splitting and combining element, and a third beam splitting and combining element, corresponding to the at least two beams of light. The at least two beams of light are emitted through their respective beam splitting and combining elements. Part of the second primary color light is reflected by the second beam splitting and combining element, and the other part of the light passes through the second beam splitting and combining element and then enters the third beam splitting and combining element. After being reflected by the third beam splitting and combining element, the second primary color light reflected by the second and third beam splitting and combining elements is emitted after passing through the beam splitting and combining elements corresponding to the at least two beams of light. The beam splitting and combining assembly also includes a fourth beam splitting and combining element. The first excitation light and the second excitation light are combined at the fourth beam splitting and combining element and then emitted.

[0086] For example, such as Figure 1 As shown in (h), assume that the first light source 01 generates two red laser beams, which are reflected by the beam splitter and combiner DM10 and the beam splitter and combiner DM11 respectively before being emitted; part of the green laser beam is reflected by the second beam splitter and combiner DM2 and then emitted by the beam splitter and combiner DM10, while the other part passes through the second beam splitter and combiner DM2 and enters the third beam splitter and combiner DM3, is reflected by the third beam splitter and combiner DM3 and then emitted by the beam splitter and combiner DM11; the blue laser beam generated by the first light source 01 is reflected by the fourth beam splitter and combiner DM4 and then combined with the blue laser beam generated by the second light source 02 transmitted through the fourth beam splitter and combiner DM4 before being emitted.

[0087] Optionally, 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; the first and second wavelength ranges are not limited, for example, the dominant wavelength of the first wavelength range can be 465 nm, and the dominant wavelength of the second wavelength range can be 455 nm. Using the combined light of the first and second excitation lights of different wavelengths as the excitation light or as the output light can improve the problems of speckle and purple tint in the projected image. The fourth beam splitter and combiner element can transmit or reflect light within the first wavelength range and reflect or transmit light within the second wavelength range through wavelength combining.

[0088] 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 and second polarization states are not limited, for example, the first polarization state can be P-state and the second polarization state can be S-state, or the first polarization state can be S-state and the second polarization state can be P-state. The fourth beam splitter and combiner can combine light through polarization states, and can reflect or transmit S-state light, and transmit or reflect P-state light; for example, it can be a polarization beam splitter, such as a polarization beam splitter prism or a polarization beam splitter film.

[0089] Optionally, the first excitation light is light of a first polarization state of a target wavelength band, and the second excitation light is light of a second polarization state of the target wavelength band. The target wavelength band can be defined according to actual application, for example, the target wavelength band can be 440-464 nm. The fourth light splitting and combining element can transmit or reflect the light of the first polarization state of the target wavelength band, and reflect or transmit the light of the second polarization state of the target wavelength band.

[0090] It should be noted that the light splitting and combining mode in the light source assembly is only an example. In actual application, other mirrors, dichroic mirrors, etc. can also be added to make the light beam exit according to a certain light path or direction. In addition, when there is no second light source in the light source assembly, the fourth light splitting and combining element can also be a mirror.

[0091] In some embodiments, the light source assembly includes a first light source and a dynamic adjustment element. The first light source can generate the first excitation light, and the first excitation light includes the first excitation light. When the dynamic adjustment element is in a first state, the first excitation light is emitted by the first light source and is incident on the target excitation area through the dynamic adjustment element and the light guide assembly. When the dynamic adjustment element is in a second state, the first excitation light is emitted by the first light source and is guided to the light homogenizing element through the dynamic adjustment element, the light guide assembly and / or the light combining assembly, and then exits after being homogenized by the light homogenizing element.

[0092] 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 light path, so that the first excitation light can pass through the transmission area and be incident on the fourth light splitting and combining element, and then exit after passing through the fourth light splitting and combining element, and then be guided to the target excitation area of the light conversion element by the light guide assembly. The second state indicates that the driving device drives the reflection area of the dynamic adjustment element to be located in the light path, so that the first excitation light is reflected by the reflection area and then exits, and then is guided to the light homogenizing 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 mirror 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, so that the first excitation light can directly enter the fourth light splitting and combining element, and then exit after passing through the fourth light splitting and combining element, and then be guided to the target excitation area of the light conversion element by the light guide assembly. The second state indicates that the driving device drives the dynamic adjustment element to be located in the light path, so that the first excitation light is reflected by the dynamic adjustment element and then exits, and then is guided to the light homogenizing element. Optionally, if it is a dichroic mirror, it can also transmit the second primary color light or the first primary color light. When the first excitation light is needed as the exit light, the light path of the first excitation light can be changed by the dynamic adjustment element, so that the first excitation light passes through fewer elements, reduces the loss of light when passing through different elements, and improves the utilization rate of light.

[0093] In some embodiments, the light conversion element comprises a reflection region; when the excitation light is emitted by the light source assembly, the excitation light is guided into the reflection region by the light guide assembly, the excitation light reflected by the reflection region is guided into the light combination assembly by the light guide assembly, and the excitation light is guided to the light uniformization element by the light combination assembly, and the excitation light is emitted after being uniformly lightened by the light uniformization element.

[0094] The reflection region has the characteristic of reflecting all light, for example, any one of a mirror, a polished metal layer or a metal plate, a substrate coated with a reflective film, particles with diffuse reflection, a microstructure reflective layer, and a reflective diffuser. Optionally, the reflection surface of the reflection region and the excitation region are substantially in the same plane.

[0095] In some embodiments, the light conversion element can comprise a transmission region; when the excitation light is emitted by the light source assembly, the excitation light is guided into the transmission region by the light guide assembly, the excitation light transmitted by the transmission region is guided into the light combination assembly by the light guide assembly, and the excitation light is guided to the light uniformization element by the light combination assembly, and the excitation light is emitted after being uniformly lightened by the light uniformization element. The transmission region can be a transmission diffuser, a light-transmitting substrate coated with an anti-reflection film, a light-transmitting substrate, and the like.

[0096] In some embodiments, the light source system can further comprise a color filter element; the color filter element can be a color filter wheel comprising a plurality of filter regions for filtering the excitation light, the target excited light, and the target primary color light, respectively; for example, the color filter element comprises filter regions for filtering blue light, red light, and green light. The color filter element can be coated with a dichroic film on one side and a diffuser on the other side; or have a double-layer structure, one layer being a diffuser and the other layer being a filter.

[0097] In some embodiments, the light guide assembly comprises a light guide element and a first focusing lens group, and the light combination assembly comprises a first light combination element; the excitation light emitted by the light source assembly is guided into the target excitation region of the light conversion element by the light guide element and the first focusing lens group, the target excitation region is excited by the excitation light to generate target excited light, and the target excited light is guided into the first light combination element by the first focusing lens group and the light guide element; or the target primary color light emitted by the light source assembly is guided into the first light combination element together with the target excited light guided into the first light combination element, and then guided into the light uniformization element.

[0098] Optionally, the target distance is the distance between the principal ray of the excitation light emitted from the light source assembly to the optical axis of the first focusing lens group. 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 radius of curvature of the first surface of the first lens, the radius of curvature of the second surface of the first lens, the center thickness of the first lens, the refractive index of the second lens, the radius of curvature of the first surface of the second lens, the radius of curvature of the second surface of the second lens, the center thickness of the second lens, and the distance between the first and second lenses. For example, the target distance can be in the range of 2 to 12 mm. Optionally, the angle between the principal ray of the excitation light and the normal of the light conversion element is in the range of 25 to 75 degrees.

[0099] Optionally, the first focusing lens group includes at least one aspherical lens and at least one spherical lens; the radius of curvature of one surface of the aspherical lens is within a first preset radius range, and the surface coefficient is within a first preset coefficient range; the radius of curvature of the other surface is within a first preset radius range, and the surface coefficient is within a second coefficient range; the radius of curvature of one surface of the spherical lens is within a second preset radius range, and the radius of curvature 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 radius of curvature of one surface of the aspherical lens is within 15mm to 30mm, and the surface coefficient is within 1 to 2; the radius of curvature of the other surface is within 15mm to 30mm, and the surface coefficient is within 0.3 to 1; the radius of curvature of one surface of the spherical lens is within 10mm to 20mm, and the radius of curvature of the other surface is greater than or equal to 150. For example, an aspherical mirror has a radius of curvature of one surface ranging from -30mm to 30mm and a surface coefficient ranging from -20 to 20, while the other surface has a radius of curvature of -30mm to 30mm and a surface coefficient ranging from -10 to 10; a spherical mirror has a radius of curvature of one surface ranging from 10mm to 20mm, while the other surface has a radius of curvature greater than or equal to 100. Figure 2 As shown, 07 can be a spherical mirror and 08 an aspherical mirror, or 08 can be a spherical mirror and 07 an aspherical mirror. By reasonably setting the curvature parameters (radius of curvature and surface coefficient, etc.) of the lens group, the generated target excited light spot can be made elliptical, which better matches the shape of the subsequent homogenizing element and can improve the light utilization rate.

[0100] Optionally, the light guide assembly may also include other focusing lens groups, disposed on the light-emitting or light-receiving side of each element (such as the light source assembly, light guiding element, first light combining element, etc.). The number of lenses in the focusing lens group is not limited; there may be one or more lenses. The curvature parameters of the lenses are also not limited and can be set according to the actual application.

[0101] Optionally, the light guide element comprises a target light transmission region, and the excitation light generated by the light source assembly is transmitted from the target light transmission region to the first focusing lens group. The target light transmission region can be any one of a through hole, a diffusion region, an anti-reflection region, a polarization light splitting region, and a dichroic region; the diffusion region can be a diffusion sheet, the anti-reflection region can be an anti-reflection film coated on a light transmission substrate, the polarization light splitting region can be a polarization light splitting film (such as reflecting or transmitting S light, and transmitting or reflecting P light) or a polarization light splitting sheet coated on a light transmission substrate; and the dichroic region can also be a dichroic film coated on a light transmission substrate, which transmits excitation light and reflects target excited light, for example, the dichroic film transmits blue light and reflects red and green fluorescent light, and can reflect a wavelength band of at least 500-680 nm and transmit a wavelength band of at least 440-470 nm. When the target light transmission region is a through hole, the excitation light can be transmitted through the light guide element without loss or with less loss. For example, the light guide element can be a mirror with an opening, the excitation light is transmitted from the target light transmission region to the first focusing lens group, and the mirror reflects the target excited light and the excitation light. Optionally, the target light transmission region can be located at any end of the light guide element.

[0102] Optionally, the excitation light emitted by the light source assembly enters the first focusing lens group from an end of the light guide element away from or close to the first light combination element, and the excitation light emitted by the light source assembly enters the first focusing lens group from the target light transmission region, and the chief rays of the excitation light emitted from the light source assembly to the first focusing lens group do not coincide with the chief rays of the target excited light and the excitation light emitted from the light conversion element to the first focusing lens group; for example, the target light transmission region is arranged at an end of the light guide element away from the first light combination element, or the target light transmission region is arranged at an end of the light guide element close to the first light combination element. When the excitation light enters the light conversion element through any end of the light guide element, and then enters the light homogenizing element and the spatial light modulator after passing through the light combination assembly and the light guide assembly, the chief rays of the excitation light and the target excited light can coincide, and the long axis and the short axis of the light spot can correspond to the long side and the short side of the light homogenizing element and the spatial light modulator, respectively, thereby improving the utilization rate of light.

[0103] Optionally, the overlapping area between the target light transmission region and the light spot region formed by the target excited light on the light guide element is less than or equal to a preset proportion of the area of the target light transmission region. The preset proportion is not limited and can be set according to actual application, for example, the proportion is within 0-10%. The shape of the target light transmission region is not limited and can be rectangular, circular, elliptical, etc.

[0104] Optionally, the target edge length of the target light transmission region is determined according to the long edge length of the light guide element, the target distance, and the long axis length of the excitation light spot. The target edge can be parallel to the long axis of the target excited light or the long edge of the light guide element. For example, the size of the target light transmission region can be in the range of 11mm*15mm~9.4mm*4.5mm, i.e., the length of the target edge is in the range of 9.4mm~15mm.

[0105] Optionally, the excitation light generated by the light source assembly can also avoid the light guide element and enter the first focusing lens group from the side edge (the side away from or close to the first light combination element) of the light guide element. The side edge can mean that the excitation light spot is at a preset distance from the edge of the light guide element, and the preset distance is greater than or equal to zero; that is, compared with the above-mentioned light guide element with a target light transmission region, the light guide element can be a shortened mirror; which can reduce the loss of excitation light on the light guide element. Optionally, the light guide element can also be an L-shaped element, and the excitation light enters the first focusing lens group from the L-shaped end.

[0106] Optionally, 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 in a preset wavelength range and the polarization state is a target polarization state, and the first light combination element reflects or transmits the target excited light and the excitation light, and transmits or reflects the first primary color light and the second primary color light.

[0107] The preset wavelength range and the target polarization state are not limited and can be set according to actual application conditions, such as 642nm~648nm. For example, the second primary color light is green laser light with a wavelength in the range of 642nm~648nm, and the target polarization state can be S state; the first primary color light is red laser light with a wavelength in the range of 640nm~650nm; and the target excited light can be yellow light, and the first light combination element can reflect or transmit yellow light in the wavelength range of 540nm~620nm.

[0108] Optionally, the first light combination element includes a target region; the target region transmits or reflects the target primary color light, and the region outside the target region of the first light combination element reflects or transmits the target excited light.

[0109] The target region can be any one of a through hole, a diffusion region, an anti-reflection region, a polarization light splitting region, and a dichroic region; the diffusion region can be a diffusion sheet, the anti-reflection region can be an anti-reflection film coated on a light transmission substrate, and the polarization light splitting region can be a polarization light splitting film (such as reflecting or transmitting S light and transmitting or reflecting P light) coated on a light transmission substrate; the target region can also be a dichroic film coated on a light transmission substrate, which reflects the target excited light and transmits the target primary color light. For example, the red laser light and the green laser light generated by the light source assembly are both transmitted from the target region, and the red fluorescent light, yellow fluorescent light, green fluorescent light, etc. generated by the light conversion element or the blue laser light reflected by the reflection region are reflected by the region outside the target region.

[0110] Optionally, the at least one primary color light comprises a first primary color light and a second primary color light, and the at least one excitation region comprises a first excitation region and a second excitation region; the first combining element transmits or reflects the first primary color light and reflects or transmits the stimulated light generated by the first excitation region; the first primary color light and the stimulated light generated by the first excitation region are different wave bands of light, for example, the first combining element transmits or reflects red laser light and reflects or transmits red fluorescent light or yellow fluorescent light, and the wave band of the red laser light is different from that of the red fluorescent light or the yellow fluorescent light. The first combining element comprises a target region, the target region transmits or reflects the second primary color light, and the region outside the target region of the first combining element reflects or transmits the stimulated light generated by the second excitation region; the second primary color light and the stimulated light generated by the second excitation region are the same wave band of light or have overlapping wave bands, for example, the target region transmits or reflects green laser light, and the region outside the target region reflects or transmits green fluorescent light.

[0111] In some embodiments, the light guide assembly comprises 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 enters the combining assembly; or the target primary color light emitted by the light source assembly is diffused by the first diffusion element and then enters the combining assembly.

[0112] Optionally, the first diffusion element can be a static diffusion sheet, a diffusion wheel or a dynamic diffusion spot element, and the dynamic diffusion spot element can be a diffusion sheet capable of high-frequency movement.

[0113] Optionally, a shaping and expanding lens group and / or a second diffusion element are arranged between the combining assembly and the light uniformizing element, and the second diffusion element comprises at least one diffusion region; or the light conversion element comprises at least one diffusion region. The second diffusion element can be a static diffusion sheet, a diffusion wheel or a dynamic diffusion spot element; for example, the diffusion wheel comprises at least one diffusion region.

[0114] Optionally, at least one of the excitation light and the target primary color light entering the combining assembly is diffused by the at least one diffusion region and then enters the light uniformizing element. Diffusing each light before it enters the light uniformizing element can reduce the speckle phenomenon of the projection device.

[0115] Optionally, the at least one diffusion region comprises a first diffusion region, a second diffusion region and a third diffusion region; 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 is diffused by the first diffusion region and then enters the light uniformizing element; 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 is diffused by the second diffusion region and then enters the light uniformizing element; and the excitation light is diffused by the third diffusion region and then enters the light uniformizing element. For example, the red laser light or the combined light of the red laser light and the red fluorescent light is diffused by the first diffusion region, the green laser light or the combined light of the green laser light and the green fluorescent light is diffused by the second diffusion region, and the blue laser light is diffused by the third diffusion region.

[0116] Optionally, the first diffusion region has a diffusion half-angle of a first angle, the second diffusion region has a diffusion half-angle of a second angle, and the third diffusion region has a diffusion half-angle of a third angle. The first angle, the second angle, and the third angle are not limited and can be set according to actual application conditions; for example, the first angle and the second angle are 5 degrees, and the third angle is 8 degrees. Different color lights correspond to different diffusion angles, which can make the incident angles of the color lights incident into the light homogenizing element approximately equal, thereby making the uniformity of the projection device better and reducing speckle.

[0117] Optionally, at least one of the excitation light and the target primary color light is diffused through at least one diffusion region before being incident into the light homogenizing element, and a chief ray of the at least one of the excitation light and the target primary color light has an incident angle within a target angle range when being incident into the light homogenizing element, so as to be reflected multiple times in the light homogenizing element. The target angle range can be set according to actual application conditions; for example, when the light homogenizing element is a light rod, the target angle range is 12 degrees to 28 degrees. By making the light incident into the light rod at a larger angle, the number of times of reflection of the light in the light rod can be increased, thereby making the uniformity of the projection device better and reducing speckle.

[0118] Optionally, when the light emitted by the light source system includes the target excited light, the second diffusion element is moved out of the light path; the light source system can include a driving device corresponding to the second diffusion element, the driving device moves the second diffusion element out of the light path when the light emitted by the light source system includes the target excited light, and moves the second diffusion element into the light path when the light emitted by the light source system does not include the target excited light, so as to diffuse the target primary color light and the excitation light. Alternatively, the light conversion element or the second diffusion element includes a transmission region, and when the light emitted by the light source system includes the target excited light, the transmission region of the light conversion element or the second diffusion element is placed in the light path; the transmission region can be coated with an anti-reflection film or be a transparent substrate, etc. The target primary color light and the excitation light are diffused through the diffusion region of the light conversion element or the second diffusion element.

[0119] In some embodiments, the excitation light emitted by the light source assembly is incident into the reflection region of the light conversion element through the light guide element and the first focusing lens group; the light path of the excitation light reflected by the reflection region can include the following:

[0120] (1) The light combination assembly further includes a second light combination element, the excitation light reflected by the reflection region is incident into the first light combination element through the first focusing lens group and the light guide element, the first light combination element reflects part of the excitation light and transmits another part of the excitation light, the reflected part of the excitation light is incident into the light homogenizing element, and the transmitted part of the excitation light is incident into the second light combination element, is reflected by the second light combination element, is then incident into the first light combination element, and is transmitted through the first light combination element to be incident into the light homogenizing element;

[0121] For example, as shown in FIG. 1, the light combination assembly includes a light guide element 1, a first focusing lens group 2, a first light combination element 3, a light homogenizing element 4, a second light combination element 5, a second focusing lens group 6, and a second light guide element 7. Figure 2As shown, it is a schematic diagram of a light source system provided by the embodiment, different forms of arrowed dashed lines in the figure are used to schematically represent the light path of each light. The light source system includes light source assembly, focusing lens groups 03 and 04, light guide element 05, first focusing lens groups 07 and 08, light conversion element 09, focusing lens group 10, second focusing lens groups 13 and 14, first light combining element 15, second light combining element 06, focusing lens groups 16 and 17 and light homogenizing element 18; the light source assembly includes first light source 01 and second light source 02 and light splitting and combining assembly, the light source assembly emits blue laser, red laser and green laser, and the light combining mode of the light source assembly is not limited; the light conversion element includes excitation area for generating green fluorescence, reflection area and diffusion area.

[0122] When the light source system needs to emit red light, the light source assembly emits red laser, and the red laser passes through the second focusing lens groups 13 and 14, 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 light homogenizing element 18.

[0123] When the light source system needs to emit green light, the light source assembly emits blue laser; the blue laser passes through the focusing lens groups 03 and 04, the light guide element 05 and the first focusing lens groups 07 and 08 and enters the excitation area for generating green fluorescence of the light conversion element 09, the excitation area is excited by the blue laser to generate green fluorescence, and the green fluorescence passes through the first focusing lens groups 07 and 08 and the light guide element 05 and enters the first light combining element 15; the green fluorescence entering the first light combining element 15 is reflected by the first light combining element 15 and then passes through the focusing lens groups 16 and 17 and the diffusion area of the light conversion element 09 and enters the light homogenizing element 18.

[0124] When the light source system needs to emit blue light, the light source assembly emits blue laser; the blue laser passes through the focusing lens groups 03 and 04, the light guide element 05 and the first focusing lens groups 07 and 08 and enters the reflection area of the light conversion element 09, the reflected blue laser of the reflection area passes through the first focusing lens groups 07 and 08 and the light guide element 05 and enters the first light combining element 15, the first light combining element 15 reflects part of the excitation light and transmits another part of the excitation light, the reflected part of the excitation light passes through the focusing lens groups 16 and 17 and the diffusion area of the light conversion element 09 and enters the light homogenizing element 18, the transmitted part of the excitation light enters the second light combining element 06, is reflected by the second light combining element 06 and then 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 light homogenizing element 18.

[0125] (2) The light combination assembly further comprises an adjustable element. The excitation light reflected by the reflection region is emitted into the first light combination element through the first focusing lens group and the light guide element, is emitted into the adjustable element through the first light combination element, is reflected by the adjustable element and is emitted into the first light combination element, and is emitted into the light homogenizing element through the first light combination element. Optionally, the target light transmission region is arranged at one end of the light guide element away from the first light combination element. Optionally, the size of the adjustable element is greater than or equal to the size of the light guide element; the length and the width of the adjustable element are greater than or equal to the length and the width of the spot of the target primary color light; and the thickness of the adjustable element can be reduced to reduce the loss of the target primary color light.

[0126] For example, as shown in FIG. 12, which is a schematic diagram of another light source system provided by the embodiment. Compared with the light source system shown in FIG. 11, the second light combination element is removed and the adjustable element 12 is added; the light source assembly emits blue laser, red laser and green laser; the first light combination element 15 reflects fluorescent light (green fluorescent light and red fluorescent light or yellow fluorescent light) and transmits blue laser, red laser and green laser; the adjustable element 12 transmits red laser and green laser and reflects blue laser; and the light conversion element comprises an excitation region for generating green fluorescent light and / or an excitation region for generating red fluorescent light or yellow fluorescent light, a reflection region and a diffusion region. Figure 3 Figure 2 For example, as shown in FIG. 12, which is a schematic diagram of another light source system provided by the embodiment. Compared with the light source system shown in FIG. 11, the second light combination element is removed and the adjustable element 12 is added; the light source assembly emits blue laser, red laser and green laser; the first light combination element 15 reflects fluorescent light (green fluorescent light and red fluorescent light or yellow fluorescent light) and transmits blue laser, red laser and green laser; the adjustable element 12 transmits red laser and green laser and reflects blue laser; and the light conversion element comprises an excitation region for generating green fluorescent light and / or an excitation region for generating red fluorescent light or yellow fluorescent light, a reflection region and a diffusion region.

[0127] When red light is needed to be emitted by the light source system, the light source assembly emits red laser and blue laser; the blue laser is emitted into the excitation region for generating red fluorescent light or yellow fluorescent light of the light conversion element 09 through the focusing lens groups 03 and 04, the light guide element 05 and the first focusing lens groups 07 and 08, the excitation region is excited by the blue laser to generate red fluorescent light or yellow fluorescent light, the red fluorescent light or yellow fluorescent light is emitted into the first light combination element 15 through the first focusing lens groups 07 and 08 and the light guide element 05; the red laser emitted by the light source assembly is emitted into the first light combination element 15 through the second focusing lens groups 13 and 14, and after the red laser is combined with the red fluorescent light or yellow fluorescent light emitted into the first light combination element 15, the combined light is emitted into the light homogenizing element 18 through the focusing lens groups 16 and 17 and the diffusion region of the light conversion element 09.

[0128] When green light is needed to be emitted by the light source system, the process is similar to that of generating red fluorescent light, which will not be described herein.

[0129] ​When the light source system needs to emit blue light, the light source component emits blue laser light. The blue laser light passes through focusing lens groups 03 and 04, light guiding element 05, and first focusing lens groups 07 and 08 and enters the reflection area of ​​light conversion element 09. The blue laser light reflected from the reflection area passes through the first focusing lens groups 07 and 08 and light guiding element 05 and enters the first light combining element 15. After passing through the first light combining element 15, it enters the adjustable element 12. After being reflected by the adjustable element 12, it enters the first light combining element 15 again. After passing through the diffusion area of ​​the first light combining element 15, focusing lens groups 16 and 17, and light conversion element 09, it enters the uniform light element 18. Alternatively, the light conversion element includes an excitation area that generates cyan light. When the light source system needs to emit blue light, the blue laser light can be directed into the excitation area that generates cyan light. The excitation area generates cyan light, which can be referred to in the description of generating red fluorescence, and will not be repeated here. After passing through the adjustable element 12 or the first light combining element 15, the desired blue light band is selected to obtain blue light.

[0130] For example, such as Figure 4 The diagram shown is a schematic of another light source system provided in this embodiment. Figure 3 Compared to the light source system shown, Figure 4 The light source system shown 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-reducing element, or it 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 above. Figure 1 As described in (g), the second light source 02 may be omitted, in which case the fourth light-splitting and combining element can be a reflector; the light conversion element includes an excitation region and a reflection region that generate 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 laser light and green laser light and reflects blue light, and the dimensions of the long and short sides of the adjustable element 12 are greater than or equal to the dimensions of the major and minor axes of the red and green laser light spots, respectively. The light guiding element 05 can be a reflector with a through-hole, which has high reflection efficiency of the excited light and reduces the loss of the excited light.

[0131] When the light source system needs to emit red light, the light source assembly emits red laser and blue laser; the blue laser transmits through the focusing lens groups 03 and 04, the light guide element 05 and the first focusing lens groups 07 and 08, and enters the excitation area of the light conversion element 09 for generating red fluorescent light or yellow fluorescent light, the excitation area is excited by the blue laser to generate red fluorescent light or yellow fluorescent light, and the red fluorescent light or yellow fluorescent light enters the first light combination element 15 through the first focusing lens groups 07 and 08 and the light guide element 05; the red laser emitted by the light source assembly enters the adjustable element 12 after being diffused by the first diffusion element 19, transmits through the adjustable element 12, enters the first light combination element 15, combines with the red fluorescent light or yellow fluorescent light entering the first light combination element 15, and then transmits through the focusing lens groups 16 and 17 and enters the light homogenizing element 18.

[0132] When the light source system needs to emit green light, the light source assembly emits green laser, which enters the adjustable element 12 after being diffused by the first diffusion element 19, transmits through the adjustable element 12, enters the first light combination element 15, transmits through the first light combination element 15 and the focusing lens groups 16 and 17, and enters the light homogenizing element 18.

[0133] When the light source system needs to emit blue light, it is similar to the above Figure 3 , but does not pass through the diffusion area of the light conversion element 09, which will not be described again. Alternatively, the light source assembly can include a dynamic adjustment element (not shown in the figure), when the light source system needs to emit blue light, the first light source emits blue laser, and the dynamic adjustment element is in the second state, the blue laser is reflected by the dynamic adjustment element, then transmits through the first light splitting and light combination element DM1, the first diffusion element 19, the adjustable element 12, the first light combination element 15, the focusing lens groups 16 and 17, and enters the light homogenizing element 18.

[0134] (3) The light guide assembly further includes an adjustable element, the excitation light reflected by the reflection area transmits through the first focusing lens group and the light guide element, is reflected by the adjustable element back to the light guide element, transmits through the light guide element, enters the first light combination element, and is reflected or transmitted by the first light combination element to the light homogenizing element. The adjustable element can be a reflective diffuser, a mirror, etc. The target light transmission area is arranged at one end of the light guide element close to the first light combination element.

[0135] For example, as Figure 5 shown, it is a schematic diagram of another light source system provided by the embodiment; compared with the light source system shown in Figure 3 , the adjustable element 12 is exchanged in position, and the adjustable element 12 reflects the excitation light. The red laser and the green laser do not need to pass through the adjustable element 12, which can reduce the loss of light.

[0136] The blue laser reflected from the reflection area of ​​the light conversion element 09 passes through the first focusing lens group 07 and 08 and the light guiding element 05 and enters the adjustable element 12. It is reflected back to the light guiding element 05 by the adjustable element 12, and then passes through the light guiding element 05 into the first light combining element 15. 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... Figure 6 As shown, light passes through the first light combining element 15, the focusing lens group 16 and 17, and the second diffusion element 22 to the light homogenizing element 18. The second diffusion element 22 can be a diffusion wheel or a static diffusion sheet, etc. At the same time, the first light combining element 15 reflects red laser and green laser.

[0137] For example, such as Figure 7 The diagram shown is a schematic of another light source system provided in this embodiment; and Figure 5 Compared to the light source system shown, the second focusing lens groups 13 and 14 are replaced by the first diffusion element 19, the focusing lens groups 16 and 17 are replaced by the second diffusion element 22, and the homogenizing element 18 can be a compound eye. The light conversion element may include an excitation region that generates red or yellow fluorescence and / or an excitation region and a reflection region that generate green fluorescence.

[0138] The red laser in the light source assembly consists of two beams. The red laser spot is enlarged by beam-splitting and combining elements DM10 and DM11, and a first diffuser element 19. The beam then combines with the red fluorescence at the first combining element 15. The green laser in the light source assembly is focused by a reflective concave mirror DM2, and then passes through the first diffuser element 19 before entering the target area of ​​the first combining element 15. The size of the target area can be set relatively small to reduce light loss and improve light utilization. The red and green lasers are then amplified and speckle eliminated by the second diffuser element 22, which improves the uniformity of the projected image. Optionally, the light conversion element may also include a diffusion region, or the first diffuser element 19 may be replaced by the diffusion region within the light conversion element. Optionally, the first combining element may be replaced by a dynamic speckle elimination element, and the second diffuser element 22 may not be provided, which can reduce fluorescence loss.

[0139] For example, such as Figure 8 The diagram shown is a schematic of another light source system provided in this embodiment; and Figure 7 Compared to the light source system shown, the light source component includes two red lasers, which are closer to the compound eye to avoid excessive light spot dispersion due to excessive distance.

[0140] (4) the light guide assembly comprises a light guide element and a first focusing lens group, and the light combination assembly comprises a first light combination element and a second light combination element; the excitation light emitted by the light source assembly is incident into the target excitation area of the light conversion element through the light guide element and the first focusing lens group, the target excitation area is excited by the excitation light to generate target excited light, and the target excited light is incident into the first light combination element; or the target base color light emitted by the light source assembly is incident into the second light combination element, and the target excited light incident into the first light combination element and the target base color light incident into the second light combination element are combined by the second light combination element and then are incident into the light homogenizing element.

[0141] For example, as shown in FIG. 4, which is a structural schematic diagram of another light source system provided by the embodiment, the light source system comprises a light source assembly, focusing lens groups 03 and 04, a light conversion element 09, focusing lens groups 16 and 17, a first light combination element 15, a second light combination element 06 and a light homogenizing element 18; the light source assembly emits blue laser, red laser and green laser; the light conversion element comprises an excitation area for generating green fluorescent light or red fluorescent light or yellow fluorescent light or orange fluorescent light, a transmission area and a diffusion area. The second light combination element 06 reflects red laser and green laser, and the first light combination element 15 transmits blue laser, yellow fluorescent light or red fluorescent light or orange fluorescent light and / or green fluorescent light. Figure 9 Figure 9 When red light is needed to be emitted by the light source system, the light source assembly emits red laser, the red laser is transmitted through the diffusion area of the light conversion element 09 and is incident into the second light combination element 06, is reflected by the second light combination element 06 to the first light combination element 15, and is reflected by the first light combination element 15 to the light homogenizing element 18. Alternatively, the light source assembly emits red laser and blue laser; the blue laser is transmitted through the focusing lens groups 03 and 04 and is incident into the excitation area of the light conversion element 09 for generating yellow fluorescent light or red fluorescent light or orange fluorescent light, the excitation area is excited by the blue laser to generate yellow fluorescent light or red fluorescent light or orange fluorescent light, and the yellow fluorescent light or red fluorescent light or orange fluorescent light is transmitted through the focusing lens groups 16 and 17 and is incident into the first light combination element 15; the green laser is transmitted through the diffusion area of the light conversion element 09 and is incident into the second light combination element 06, is reflected by the second light combination element 06 to the first light combination element 15, and is combined with the green fluorescent light incident into the first light combination element 15 and then is incident into the light homogenizing element 18.

[0142] When green light is needed to be emitted by the light source system, the light source assembly emits green laser and blue laser; the blue laser is transmitted through the focusing lens groups 03 and 04 and is incident into the excitation area of the light conversion element 09 for generating green fluorescent light, the excitation area is excited by the blue laser to generate green fluorescent light, and the green fluorescent light is transmitted through the focusing lens groups 16 and 17 and is incident into the first light combination element 15; the green laser is transmitted through the diffusion area of the light conversion element 09 and is incident into the second light combination element 06, is reflected by the second light combination element 06 to the first light combination element 15, and is combined with the green fluorescent light incident into the first light combination element 15 and then is incident into the light homogenizing element 18.

[0143] When green light is needed to be emitted by the light source system, the light source assembly emits green laser and blue laser; the blue laser is transmitted through the focusing lens groups 03 and 04 and is incident into the excitation area of the light conversion element 09 for generating green fluorescent light, the excitation area is excited by the blue laser to generate green fluorescent light, and the green fluorescent light is transmitted through the focusing lens groups 16 and 17 and is incident into the first light combination element 15; the green laser is transmitted through the diffusion area of the light conversion element 09 and is incident into the second light combination element 06, is reflected by the second light combination element 06 to the first light combination element 15, and is combined with the green fluorescent light incident into the first light combination element 15 and then is incident into the light homogenizing element 18.

[0144] ​When the light source system needs to emit blue light, the light source assembly emits blue laser light; the blue laser light is transmitted through the focusing lens groups 03 and 04 and enters the transmission area of the light conversion element 09, the blue laser light transmitted by the transmission area is transmitted through the focusing lens groups 16 and 17 and enters the first light combination element 15, and then is transmitted through the first light combination element 15 and enters the light homogenizing element 18.

[0145] In some embodiments, the light source assembly can emit the first primary color light, the second primary color light and the excitation light, the light conversion element comprises the first excitation area and / or the second excitation area and the reflection area; the light source system emits in time sequence any one of the first primary color light or the combination of the first primary color light and the excited light generated by the first excitation area, the first primary color light or the combination of the first primary color light and the second primary color light and the excited light generated by the second excitation area, the combination of the first primary color light and the second primary color light, the second primary color light or the combination of the second primary color light and the excited light generated by the second excitation area, the combination of the second primary color light and the excitation light, the excitation light.

[0146] For example, the light source system can emit in time sequence the red laser light or the combination of the red laser light and the red fluorescence, the combination of the red laser light and the green laser light or the combination of the red laser light and the green fluorescence, or the combination of the red laser light and the green laser light and the green fluorescence or the combination of the red laser light and the green laser light and the red fluorescence or the combination of the green laser light and the red fluorescence, the green laser light or the combination of the green laser light and the green fluorescence, the combination of the green laser light and the blue laser light or the combination of the green fluorescence and the blue laser light, the blue laser light.

[0147] The light conversion element only comprises the target excitation area; the light source system emits in time sequence any one of the first primary color light or the combination of the first primary color light and the excited light generated by the target excitation area, the second primary color light or the combination of the first primary color light and the second primary color light and the excited light generated by the target excitation area, the combination of the first primary color light and the second primary color light, the second primary color light or the combination of the second primary color light and the excited light generated by the target excitation area, the combination of the second primary color light and the excitation light, the excitation light.

[0148] For example, the target excitation area generates yellow fluorescence, the light source system can emit in time sequence the red laser light or the combination of the red laser light and the yellow fluorescence, the combination of the red laser light and the green laser light or the combination of the red laser light and the green laser light and the yellow fluorescence or the combination of the green laser light and the yellow fluorescence, the green laser light or the combination of the green laser light and the yellow fluorescence, the combination of the green laser light and the blue laser light, the blue laser light.

[0149] In some embodiments, the light source system can also emit in time sequence the first primary color light or the combination of the first primary color light and the excited light generated by the first excitation area, the second primary color light or the combination of the second primary color light and the excited light generated by the second excitation area, the excitation light.

[0150] As can be seen from the above, the light source system provided in this embodiment combines primary color light (such as laser) and stimulated light (such as fluorescence) to combine the advantages of the two types of light, thereby greatly improving the comfort of the human eye, avoiding the color fringing problem of laser, while also having a higher color gamut and improving contrast, thus improving the image quality of the projection device; and the light combining method is compatible with multiple configurations, achieving a wide range of brightness and improving the compatibility of the projection device.

[0151] Figure 10 This is a schematic diagram of the functional modules of a projection device provided in this application. Figure 10 As shown, the projection device includes an image processor 101 and a projection optical engine 102. Wherein:

[0152] The image processor 101 can be a microcontroller, a dedicated image processing chip, etc. The microcontroller can be an ARM chip, a microcontroller unit (MCU), etc.; the dedicated image processing chip can be an image signal processor (ISP), a graphics processing unit (GPU), an embedded neural network processing unit (NPU), etc. The image processor 101 can be used for video decoding, image quality processing, etc.

[0153] Figure 11 This is a schematic diagram of the structure of a projection optical engine 102 provided in this application. Figure 2 As shown, the projection optical engine 102 includes a light source system 201, an illumination system 202, a light modulation device 203, and an imaging system 204, as described in any of the above embodiments. The light source light generated by the light source system 201 is irradiated onto the light modulation device 203 via the illumination system 202. The light modulation device 203 modulates the incident light source light into image light, which then illuminates the imaging system 204, ultimately projecting the image light onto a screen or other projected object to form a projected image. The light modulation device 203 can be any one of DMD, LCOS, or LCD; the imaging system 204 is generally a lens system, such as a projection lens.

[0154] In addition, the light source system 201 may also include a light source control module (not shown in the figure). The light source control module can control one or more light sources in the light source system 201 so that the light source system 201 emits light of the required wavelength band to form a projected image. The light source generated by the light source system 201 as described in the above embodiment includes at least a narrow-spectrum light and a broadband light. For example, the narrow-spectrum light may include a target primary color light (such as a first primary color light and a second primary color light) and an excitation light (a first excitation light and / or a second excitation light). The broadband light is the target stimulated light generated by the target excitation region (such as a first stimulated light generated by the first excitation region and / or a second excitation light generated by the second excitation region). 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.

[0155] In projection devices, the original color gamut of the light source generated by the light source system 201 may not display well. For example, the original color gamut may be very large, and in some scenarios, an excessively large color gamut can lead to color distortion or excessive glare in the displayed image, affecting the user experience. In some embodiments, the projection optical engine 102 may also include a color gamut subsystem to adjust the display based on the original color gamut, thereby improving the display effect. Figure 11 As shown, the projection optical engine 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 and the target color gamut corresponding to the target display mode. The target parameters include the target color coordinates and target brightness gain of red, green, blue and white light, or the target color coordinates and target brightness gain of red, green, blue and white light and at least one of cyan, magenta and yellow light. The control module 213 is used to control the light modulation device 203 according to the target parameters obtained by the color gamut adjustment module 212, so as to achieve the target requirements.

[0156] Figure 12 This is a flowchart illustrating a display control method provided in this embodiment, applicable to the aforementioned projection optical engine 102. For example... Figure 12 As shown, the display control method includes:

[0157] S1001, obtaining target parameters according to the original color gamut of the light source light and the target color gamut corresponding to the target display mode, the target parameters including target color coordinates and target brightness gain of red light (R), green light (G), blue light (B) and white light (W), or including target color coordinates and target brightness gain 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 the embodiment, the red light refers to light when only the light source generating light containing the red light spectrum is lighted; the green light refers to light when only the light source generating light containing the green light spectrum is lighted; the blue light refers to light when only the light source generating light containing the blue light spectrum is lighted; the cyan light refers to light obtained by mixing green light and blue light, or through the human eye vision, the light source generating green light at the previous moment and the light source generating blue light at the next moment, or the light obtained by simultaneously lighting the light source generating green light and the light source generating blue light; the magenta light refers to light obtained by mixing red light and blue light, or through the human eye vision, the light source generating red light at the previous moment and the light source generating blue light at the next moment, or the light obtained by simultaneously lighting the light source generating red light and the light source generating blue light; the yellow light refers to light obtained by mixing red light and green light, or through the human eye vision, the light source generating red light at the previous moment and the light source generating green light at the next moment, or the light obtained by simultaneously lighting the light source generating red light and the light source generating green light. For example, the main wavelength range of the red light is 600-660 nm, the main wavelength range of the blue light is 440-460 nm, the main wavelength range of the green light is 500-580 nm, the main wavelength range of the yellow light is 580-595 nm, the main wavelength range of the cyan light is 470-500 nm, and the main wavelength range of the magenta light is 580-600 nm.

[0158] The original color gamut of the projection light machine 102 can be obtained by measurement, and then the measurement data is saved in the projection device, that is, the Y (brightness) xy (color coordinates) values of RGBW are known. In the embodiment, the original parameters include the original color coordinates and the original brightness ratio of RGBW, and the original brightness ratio of RGBW is equal to the ratio of the original brightness of each to the original brightness of W, for example, the original brightness ratio of R is equal to the ratio of the original brightness Y B of R to the original brightness Y W of W, and the original brightness ratio of W is equal to 1. The original brightness ratio is used instead of the original brightness to improve accuracy. Alternatively, the original color gamut can also include at least one of CMY, and the original parameters can also include the original color coordinates and the original brightness ratio of at least one of CMY, which can also be obtained by measurement.

[0159] When the display mode is determined, the target color gamut is also determined, such as the target color gamut corresponding to mode one is P3 color gamut, the target color gamut corresponding to mode two is Rec709 color gamut, the projection light machine 102 can select the corresponding display mode or target color gamut according to the needs, or the user can select the display mode or target color gamut. In other embodiments, the target color gamut of the projection light machine 102 can also be fixed, that is, the projection light machine 102 has only one target color gamut.

[0160] The target parameters can only include the target color coordinates and the target brightness gain of RGBW, and optionally, the target parameters can also include the target color coordinates and the target brightness gain of any one of CMY, further improving the color accuracy. This embodiment is described in detail taking the target parameters including the target color coordinates and the target brightness gain of RGBCMYW as an example. 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, and the color coordinates are represented by (x, y).

[0161] In some embodiments, the target brightness gain of W is set to 1, 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.

[0162] Further, the target color coordinates and the target brightness gain of RGB can be obtained according to the original color coordinates and the original brightness of RGB corresponding to the original color gamut, and the color coordinates of RGB corresponding to the target color gamut, and then the target color coordinates and the target brightness gain of CMY can be obtained according to the target color coordinates and the target brightness of RGB. Optionally, the target brightness gain of CMY can all be set to a constant N, the value range of N is 0-2, and preferably, N is equal to 1. The following exemplary algorithm is given.

[0163] 1. Calculate the target color coordinates of RGB.

[0164] Specifically, the target color coordinates of RGB are determined according to the intersection of the original color gamut and the target color gamut, wherein the target color coordinates of R are the coordinates corresponding to the point with the maximum x value in the intersection; the target color coordinates of G are the coordinates corresponding to the point with the maximum y value in the intersection; and the target color coordinates of B are the coordinates corresponding to the point with the minimum sum of x value and y value in the intersection.

[0165] Figures 13-14 A schematic diagram of a method for determining the target color coordinates of RGB provided in this embodiment is shown in FIGS. Figure 13 and Figure 14 As shown in FIGS. 1 and 2, the maximum y value in the polygon vertex set of the two triangles of the original color gamut and the target color gamut is the target color point of G, the maximum x value is the target color point of R, and the minimum x+y value is the target color point of B, thereby determining the target color coordinates of RGB R(x RT , yRT ), G(x GT , y GT ), B(x BT , y BT ).

[0166] 2. Calculate the target luminance gain of RGB.

[0167] According to the original color coordinates and original luminance of RGB corresponding to the original color gamut and the target color coordinates and first luminance of R, the target maximum luminance Y max_R of R is obtained; according to the original color coordinates and original luminance of RGB corresponding to the original color gamut and the target color coordinates and second luminance of G, the target maximum luminance Y max_G of G is obtained; according to the original color coordinates and original luminance of RGB corresponding to the original color gamut and the target color coordinates and third luminance of B, the target maximum luminance Y max_B of B is obtained; according to the target color coordinates and target maximum luminance of RGB and the target color coordinates and target luminance of W, the target luminance gain M R , M G , M B of RGB is obtained, wherein the first luminance, the second luminance and the third luminance are an assumed intermediate value; the target maximum luminance is the maximum luminance after the original RGB color mixing to the RGB target color point, thus it can be ensured that the luminance of W obtained by the RGB color mixing after the color gamut adjustment is equal to the target luminance of W.

[0168] In this embodiment, it is assumed that the first luminance, the second luminance and the third luminance are all 100; the original luminance color points of RGB are R(Y1, x1, y1), G(Y2, x2, y2), B(Y3, x3, y3); the target luminance 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 ), wherein Y' RT , Y' GT , Y' BT are all 100, and the calculation method of the target maximum luminance Y max_R of R is as follows:

[0169] M 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)

[0170] 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)

[0171] 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))

[0172] M1=M 01 *Y’ RT / Y1

[0173] M2=M 02 *Y’ RT / Y2

[0174] M3=M 03 *Y’ RT / Y3

[0175] M max =max(M1,M2,M3)

[0176] Y max_R =M1 / M max *Y1+M2 / M max *Y2+M3 / M max *Y3

[0177] Similarly, the target maximum luminance Y max_G , Y max_B of GB can be calculated by replacing the target luminance color point (Y’ RT , x RT , y RT ) of R with the target luminance color point (Y’ GT , x GT , y GT ) of GB, B(Y’ BT , x BT , y BTThat's it. Then replace the original RGB luminance color points R(Y1, x1, y1), G(Y2, x2, y2), B(Y3, x3, y3) in the above formula with the target maximum RGB luminance color point R(Y1, x1, y1), G(Y2, x2, y2), B(Y3, x3, y3). max_R x RT y RT ),G(Y max_G x GT y GT ),B(Y max_B x BT y BT ), and the target brightness color point (Y') of R. RT x RT y RT Replace ) with the target brightness color point (Y) of W. WT x WT y WT The target RGB brightness gain M can then be obtained. R M G M B .

[0178] Furthermore, the target luminance gain M in RGB can also be used. R M G M B Obtain the actual target brightness Y in 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 .

[0179] In some other embodiments, the target RGB brightness gain may also be set to a value between 0 and 2.

[0180] 3. Calculate the target color coordinates of CMY.

[0181] Assuming the tristimulus values ​​are XYZ, the target XYZ values ​​for RGB can be calculated first based on the target Yxy values ​​for RGB. Then, the target XYZ values ​​for CMY can be calculated based on the target XYZ values ​​for RGB. Finally, the target Yxy values ​​for CMY can be calculated based on the target XYZ values ​​for CMY. The formula for calculating the Yxy values ​​based on the XYZ values ​​is as follows:

[0182] x=X / (X+Y+Z), y=Y / (X+Y+Z);

[0183] The calculation formula of XYZ value according to Yxy value is as follows:

[0184] X = (x / y)Y, Z = ((1-x-y) / y)Y;

[0185] The Y value in XYZ value and Yxy value is consistent.

[0186] The following relationship exists between the target XYZ value of CMY and the target XYZ value of RGB:

[0187] X CT = X GT + X BT , Y CT = Y GT + Y BT , Z CT = Z GT + Z BT ;

[0188] X MT = X RT + X BT , Y MT = Y RT + Y BT , Z MT = Z RT + Z BT ;

[0189] X YT = X RT + X GT , Y YT = Y RT + Y GT , Z YT = Z RT + Z GT ;

[0190] Wherein, X CT , Y CT , Z CT are the target XYZ value of C respectively; X MT , Y MT , Z MT are the target XYZ value of M respectively; X YT , Y YT , Z YT are the target XYZ value of Y respectively; X RT , Y RT , Z RT are the target XYZ value of R respectively; X GT , Y GT , Z GT are the target XYZ value of G respectively; X BT , Y BT , ZBT These are the target XYZ values ​​for B.

[0191] Optionally, the target brightness gain of CMY can be equal to the ratio of their respective target brightness to the sum of the target brightness of the two colors that form 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 ).

[0192] S1002. Control the light modulation device according to the original parameters and target parameters. The original parameters include the original color coordinates and original brightness ratio of RGBW corresponding to the original color gamut.

[0193] After obtaining the target parameters, the color gamut adjustment module 212 can send the original parameters and 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.

[0194] like Figure 11 As shown, the projection optical engine may also include a mode switching module 211 for determining the target display mode. The mode switching module 211 can select the corresponding display mode as needed, or determine the target display mode according to the user's selection command. Under different display modes, the timing of the light generated by the light source system 201 will also be different. For example, when the target display mode is mode one, the emission time of the first primary color light is the same as the emission time of the first stimulated light, and the emission times of the second primary color light and the first stimulated light do not overlap with the emission time of the first primary color light. When the target display mode is mode two, 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 overlaps at least partially with the emission time of the first stimulated light. The emission times of the second primary color light and the stimulated light overlap at least partially with the emission time of the first primary color light. At least two of the first primary color light, the second primary color light, and the first stimulated light have at least partially overlapping emission times, thus satisfying different display requirements. For example, assuming the first primary color light is red laser, the first excited light is yellow or red fluorescence, the second primary color light is green laser, and the first excited light is blue laser, then the timing sequence corresponding to Mode 1 may include, but is not limited to, the following: Figure 15 As shown, the timing sequence corresponding to Mode 2 may include, but is not limited to, the following: Figure 16 or Figure 17As shown, switching between mode one and mode two only requires adjusting the lighting time of the corresponding light source.

[0195] Optionally, the light source also includes a second stimulated light, which has the same color as the second primary color light, or the spectrum of the second stimulated light at least includes the spectrum of the second primary color light. When the target display mode is mode one, the emission time of the second primary color light and the emission time of the second stimulated light are the same. When the target display mode is mode two, the emission time of the second primary color 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 color light and the emission time of the second stimulated light at least partially overlap. For example, assuming the first primary color light is a red laser, the first stimulated light is a yellow or red fluorescent light, the second primary color light is a green laser, the first excitation light is a blue laser, and the second stimulated light is a green fluorescent light, then the timing sequence corresponding to mode one may include, but is not limited to, the following: Figure 18 As shown, the timing sequence corresponding to Mode 2 may include, but is not limited to, the following: Figure 19 or Figure 20 or Figure 21 As shown.

[0196] 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 one, the emission time of the second excitation light is within the emission time of the excitation light. When the target display mode is mode two, 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 stimulated light, the second primary color light, the first excitation light, and the second stimulated light. For example, assuming the first primary color light is a red laser, the first stimulated light is a red or yellow fluorescent light, the second primary color light is a green laser, the first excitation light is a blue laser, the second stimulated light is a green fluorescent light, and the second excitation light is a blue laser, then the timing sequence corresponding to mode one is as follows: Figure 22 As shown, the timing sequence corresponding to Mode 2 may include, but is not limited to, the following: Figure 23 or Figure 24 As shown.

[0197] It should be understood that when the light source simultaneously includes the first primary color light, the first stimulated light, the second primary color light, the first stimulated light, the second stimulated light, and the second stimulated light, assuming the first primary color light is red light, the second primary color light is green light, the first stimulated light is blue light, and the second stimulated light is blue light, then the red light in step S1001 above consists only of the first primary color light and / or the first stimulated light, the green light consists only of the second primary color light and / or the second stimulated light, and the blue light consists only of the first stimulated light and / or the second stimulated light.

[0198] Optionally, when the target display mode is mode two, the original color coordinates and original brightness of the corresponding mixed light can also be considered when calculating the target color coordinates and target brightness gain of CMY in step S1001, further improving the accuracy of color gamut adjustment. For example, the target color coordinates of yellow light are obtained according to 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 being the mixed light obtained when the light source generating red light and the light source generating green light are simultaneously turned on, for example Figure 23 the overlapping part of the emission time of the first primary color light and the second primary color light shown in FIG. 1B; or for example, the target color coordinates of cyan light are obtained according to 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 being the mixed light obtained when the light source generating green light and the light source generating blue light are simultaneously turned on, for example Figure 23 the overlapping part of the emission time of the second primary color light and the first excitation light shown in FIG. 1C.

[0199] In some embodiments, in order to avoid long-time turning on of the laser, causing heat accumulation, in each turning-on period, the turning-on time of the light source can be divided into two segments, for example, the turning-on period is divided into a first sub-period and a second sub-period, and the turning-on time of the corresponding light source in one turning-on period is distributed in the first sub-period and the second sub-period according to the need, and the turning-on time distributed in the first sub-period and the second sub-period is discontinuous; and the turning-on time of all light sources in adjacent two turning-on periods is discontinuous. Further, the length of each turning-on time of all light sources is greater than or equal to 9% of the length of one turning-on period, ensuring the length of each turning-on time. For example, for 4K, the general requirement is 240HZ, corresponding to 4.167ms, and conventionally RGB is turned on once respectively, but in order to solve the problem of heat accumulation, the turning-on is divided into two or more times, so as to improve the efficiency of the laser and prolong the service life of the laser.

[0200] When the display mode is mode one, the same color laser and fluorescent light are completely synchronized, and the output time is completely consistent. The turning-on time of each light source is as shown in FIG. 1A, and in the embodiments of the present application, the turning-on time of each light source is as shown in FIG. 1A. Figure 25 Figure 4 ​The light source system shown is as follows: RLD represents the red laser in the first light source 01, GLD represents the green laser in the first light source 01, B1LD represents the blue laser in the first light source 01, B2LD represents the second light source 02, A1 represents the sub-period when B1LD excites and generates red fluorescence, B1 represents the sub-period when B1LD excites and generates green fluorescence, C1 represents the sub-period when B1LD generates blue laser, A2 represents the sub-period when B2LD excites and generates red fluorescence, B2 represents the sub-period when B2LD excites and generates green fluorescence, and C2 represents the sub-period when B2LD generates blue laser. This achieves good red, green, and blue pure color brightness, resulting in high screen brightness. When the display mode is mode two, by using laser light sources with independently controllable driving time, two or more colors of laser light sources can be lit simultaneously at certain times, based on mode one, thereby significantly improving white field brightness. RLD and GLD can be controlled independently in timing, while B1LD is used to excite fluorescence and generate blue light, and B2LD serves as a supplementary blue laser, which can work with B1LD. The timing of the LDs is exactly the same, and the B2 LD can also be controlled independently to excite only two or one type of light, or to produce only one type of light. In this case, different brightness levels can be achieved by adjustment, reducing power consumption. Different color gamuts and brightness levels can also be obtained by adjusting the current, such as... Figures 26-30 As shown.

[0201] Figure 4 In the illustrated light source system, the red and green lasers in the first primary color light source 01 can be used to generate the aforementioned first and second primary color lights. 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 irradiates the first excitation region of the light conversion element 09 to obtain the aforementioned first stimulated light, irradiates the second excitation region of the light conversion element 09 to obtain the aforementioned second stimulated light, and irradiates the reflection region of the light conversion element 09 to obtain the aforementioned first excitation light. The second light source 02 can be used to generate the aforementioned second excitation light. In some other embodiments, the reflection region can also be replaced with an excitation region provided with blue powder.

[0202] In some embodiments, the excitation region of the light conversion element 09 may only include a yellow fluorescent region or a green fluorescent region. Therefore, when the display mode is mode one and the second light source 02 is not included, the illumination time of each light source is as follows: Figure 30 As shown, the lighting time of each light source when the second light source 02 is included is as follows: Figure 31 As shown; when the display mode is mode two, excluding the second light source 02, the lighting time of each light source is as follows. Figure 32 or Figures 33-36 As shown, the lighting time of each light source when the second light source 02 is included is as follows: Figure 26 As shown.

[0203] Because the light conversion element 09 is fixedly partitioned, generally, the pure laser is used to match the fluorescence, and by adjusting the red laser and / or green laser in the first light source 01 and / or the lighting time length of the second light source 02, different modes can be compatible in the same device. For example, as shown in mode two Figure 25 to mode one shown in Figure 30 , only the lighting time of R LD and G LD needs to be shortened; and for example, as shown in mode one Figure 32 to mode two shown in Figure 10 , only the lighting time of R LD needs to be increased.

[0204] In some embodiments, in order to avoid the heat accumulation caused by the long-time lighting of the laser, in each lighting period, the lighting time of the laser light source can be divided into two sections, for example, the lighting period is divided into a first sub-period and a second sub-period, in the first sub-period, the RGB LD is sequentially lighted, and the lighting time of the RGB LD is greater than or equal to 9% of the length of a lighting period, in the second sub-period, if the display mode is mode one, the RGB LD is still sequentially lighted, and if the display mode is mode two, two or three colors of LDs are simultaneously lighted in some periods of the second sub-period, so as to avoid the 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 LDs can also be simultaneously lighted in some periods of the two sub-periods.

[0205] 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, without affecting the function implementation of the overall optical path, and the embodiments of the present application will not be described in detail.

[0206] In some embodiments, the projection device further comprises a central controller 103 having one or more processing cores, which can be a CPU, an ARM, an MCU, or the like. The central controller 103 is the control center of the projection device, and is connected to each part of the projection device through various interfaces and lines, can run or execute the software programs and / or operating systems stored in the memory 104, and call the data stored in the memory 104. Optionally, the image processor 101 and the central controller 103 can be integrated into one processor.

[0207] In some embodiments, the projection device further comprises a memory 104 having one or more computer readable storage media, an input module 105, a communication module 106, a power supply 107, and the like. Those skilled in the art can understand that the structure of the projection device shown in ​ does not constitute a limitation on the projection device, and can include more or fewer components than shown, or combine certain components, or different component arrangements. Among them:

[0208] The memory 104 can be used to store software programs and operating systems, and the central controller 103 can execute various functional applications and data processing by running the software programs and operating systems stored in the memory 104. The memory 104 can mainly include a program storage area and a data storage area, wherein the program storage area can store operating systems, application programs required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; and the data storage area can store data created according to the use of the projection device, etc. In addition, the memory 104 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state memory device. Accordingly, the memory 104 can also include a memory controller to provide the central controller 103 with access to the memory 104.

[0209] The projection device can also include an input module 105, which can be used to receive input digital or character information, and to generate remote controller, keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls.

[0210] The projection device can also include a communication module 106, which in some embodiments can include a wireless module, and the projection device can perform short-range wireless transmission through the wireless module of the communication module 106, thereby providing the user with wireless broadband Internet access. For example, the communication module 106 can be used to help the user access streaming media, etc.

[0211] The projection device also includes a power supply 107 for powering the various components, and in some embodiments, the power supply 107 can be logically connected to the central controller 103 through a power management system, thereby enabling the power management system to perform functions such as charge management, discharge management, and power consumption management, etc. The power supply 107 can also include one or more direct current or alternating current power sources, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, etc.

[0212] The terms used in the embodiments of the present application are merely used for the purpose of describing particular embodiments and are not intended to limit the present application. The singular forms "a," "an," and "the" used in the embodiments of the present application and the appended claims are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood by those of ordinary skill in the art that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items. The character " / " used herein generally represents an "or" relationship between the front and rear associated objects.

[0213] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A light source system, characterized by, The light source system comprises a light source assembly, a light guide assembly, a light combination assembly, a light conversion element and a light homogenizing element, the light conversion element comprises at least one excitation region, the light source assembly can emit excitation light and at least one primary color light; The target primary color light is any one of the at least one primary color light, and the target excitation region is any one of the at least one excitation region; When the light source assembly emits excitation light and / or target primary color light, the excitation light is incident on the target excitation region through the light guide assembly, the target excitation region is excited to generate target stimulated excitation light, and the target stimulated excitation light is guided to the light combination assembly through the light guide assembly; The target primary color light is guided to the light combination assembly through the light guide assembly, combined with the target stimulated excitation light incident on the light combination assembly, and then emitted after being homogenized by the light homogenizing element. Alternatively, the target primary color light or the target stimulated excitation light is guided to the light homogenizing element through the light guide assembly and / or the light combination assembly, and then emitted after being homogenized by the light homogenizing element. The light source assembly can emit first primary color light, second primary color light and excitation light; The light conversion element comprises a first excitation region and / or a second excitation region and a reflection region; the light source system emits the first primary color light or the combination of the first primary color light and the stimulated excitation light generated by the first excitation region, the second primary color light or the combination of the second primary color light and the stimulated excitation light generated by the second excitation region, and the excitation light in time sequence; Alternatively, the light conversion element only comprises a target excitation region; the light source system emits the first primary color light or the combination of the first primary color light and the stimulated excitation light generated by the target excitation region, the second primary color light or the combination of the second primary color light and the stimulated excitation light generated by the target excitation region, and the excitation light in time sequence; The excitation light comprises first excitation light, and the light emitting chip corresponding to the first excitation light is packaged integrally with the light emitting chip corresponding to all primary color light.

2. The light source system of claim 1, wherein The light conversion element comprises a reflection region; When the light source assembly emits excitation light, the excitation light is incident on the reflection region through the light guide assembly, the excitation light reflected by the reflection region is guided to the light combination assembly through the light guide assembly, then guided to the light homogenizing element, and finally emitted after being homogenized by the light homogenizing element.

3. The light source system of claim 1, wherein The light source assembly comprises a first light source and / or a second light source; The excitation light comprises first excitation light generated by the first light source or second excitation light generated by the second light source; Alternatively, the light source assembly further comprises a light splitting and combination assembly, the first light source generates the first excitation light, the second light source generates the second excitation light, and the light splitting and combination assembly combines the first excitation light and the second excitation light into the excitation light.

4. The light source system of claim 3, wherein The light source assembly comprises a first light source, a second light source and a light splitting and combination assembly, the first light source can generate first primary color light, second primary color light and the first excitation light, and the second light source can generate the second excitation light. The light splitting and combining assembly comprises a first light splitting and combining element and a second light splitting and combining element, the first primary color light is emitted through the first light splitting and combining element and the second light splitting and combining element, and the second primary color light is emitted through the second light splitting and combining element; or the first primary color light comprises at least two beams of light, the light splitting and combining assembly comprises a light splitting and combining element and a second light splitting and 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 combining element or the at least two beams of light are emitted through the corresponding light splitting and combining element and the second light splitting and combining element, and the second primary color light is emitted through the second light splitting and combining element; or the first primary color light comprises at least two beams of light, the light splitting and combining assembly comprises a first light splitting and combining element and a second light splitting and combining element, the 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; or the first primary color light comprises at least two beams of light, the light splitting and combining assembly comprises a first light splitting and combining element, a second light splitting and combining element and a third light splitting and combining element, the at least two beams of light are emitted through the first light splitting and combining element, part of 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 another part of the second primary color light transmits through the second light splitting and combining element and then enters the third light splitting and combining element, is reflected by the third light splitting and combining element and then emitted through the first light splitting and combining element; or the first primary color light comprises at least two beams of light, the light splitting and combining assembly comprises a light splitting and combining element, a second light splitting and combining element and a third light splitting and 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 combining element, part of the second primary color light is reflected by the second light splitting and combining element, another part of the second primary color light transmits through the second light splitting and combining element and then enters the third light splitting and combining element, is reflected by the third light splitting and combining element, and the second primary color light reflected by the second light splitting and combining element and the third light splitting and combining element is emitted through the light splitting and combining element corresponding to the at least two beams of light respectively; The light splitting and combining assembly further comprises a fourth light splitting and combining element, the first excitation light and the second excitation light are combined at the fourth light splitting and combining element and then emitted; or the light splitting and combining assembly further comprises a fourth light splitting and combining element and a fifth light splitting and combining element, the first excitation light enters the fourth light splitting and combining element through the fifth light splitting and combining element, is combined with the second excitation light at the fourth light splitting and combining element and then emitted.

5. The light source system according to claim 3, wherein the wavelength of the first excitation light is in a first waveband range, and the wavelength of the second excitation light is in a second waveband 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; or the first excitation light is light of a first polarization state in a target waveband, and the second excitation light is light of a second polarization state in the target waveband. ​ 6. The light source system of claim 1, wherein, The light guide assembly comprises a light guide element and a first focusing lens group, and the light combination assembly comprises a first light combination element; The excitation light emitted by the light source assembly enters the target excitation area of the light conversion element through the light guide 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 enters the first light combination element through the first focusing lens group and the light guide element; The target stimulated light enters the light uniformization element through the first light combination element, or the target base color light emitted by the light source assembly enters the first light combination element and then enters the light uniformization element after being combined with the target stimulated light entering the first light combination element.

7. The light source system of claim 6, wherein The excitation light emitted by the light source assembly enters the reflection area of the light conversion element through the light guide element and the first focusing lens group; The light combination assembly further comprises a second light combination element, the excitation light reflected by the reflection area enters the first light combination element through the first focusing lens group and the light guide element, the first light combination element reflects part of the excitation light and transmits another part of the excitation light, the reflected part of the excitation light enters the light uniformization element, the transmitted part of the excitation light enters the second light combination element, is reflected by the second light combination element, enters the first light combination element, and then enters the light uniformization element through the first light combination element; Or, the light combination assembly further comprises an adjustable element, the excitation light reflected by the reflection area enters the first light combination element through the first focusing lens group and the light guide element, enters the adjustable element through the first light combination element, is reflected by the adjustable element, enters the first light combination element, and then enters the light uniformization element through the first light combination element; Or, the light guide assembly further comprises an adjustable element, the excitation light reflected by the reflection area enters the adjustable element through the first focusing lens group and the light guide element, is reflected by the adjustable element back to the light guide element, enters the first light combination element through the light guide element, and then enters the light uniformization element through the first light combination element.

8. The light source system according to claim 6, wherein The at least one base color light comprises a first base color light and a second base color light, the wavelength of the second base color light is within a preset wavelength range and the polarization state is a target polarization state, the first light combination element reflects or transmits the target stimulated light, the excitation light, and transmits or reflects the first base color light and the second base color light; Or, the first light combination element comprises a target area; the target area transmits or reflects the target base color light, and the area outside the target area in the first light combination element reflects or transmits the target stimulated light. Or, 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 a second excitation region; the first light combination element transmits or reflects the first primary color light and reflects or transmits the stimulated light generated by the first excitation region; the first light combination element includes a target region, the target region transmits or reflects the second primary color light, and the region outside the target region of the first light combination element reflects or transmits the stimulated light generated by the second excitation region.

9. The light source system of claim 6, wherein, The excitation light emitted by the light source assembly enters the first focusing lens group from the light guide element away from one end of the first light combination element, and the chief ray of the excitation light emitted by the light source assembly to the first focusing lens group does not coincide with the chief ray of the target stimulated light and the excitation light emitted by the light conversion element to the first focusing lens group.

10. The light source system of claim 1, wherein, The light combination assembly includes a first light combination element and a second light combination element; The excitation light emitted by the light source assembly enters the target excitation region of the light conversion element through the light guide assembly, the target excitation region is excited by the excitation light to generate target stimulated light, and the target stimulated light enters the first light combination element; The target stimulated light enters the light uniformization element through the first light combination element, or the target primary color light emitted by the light source assembly enters the second light combination element, and then enters the light uniformization element after the target primary color light and the target stimulated light entering the first light combination element are combined by the second light combination element.

11. The light source system of claim 1, wherein, 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 enters the light combination assembly after being focused by the second focusing lens group; Or, the target primary color light emitted by the light source assembly enters the light combination assembly after being diffused by the first diffusion element.

12. The light source system according to claim 1 or 11, wherein A shaping and expanding lens group and / or a second diffusion element are arranged between the light combination assembly and the light uniformization element, and the second diffusion element includes at least one diffusion region; Or, the light conversion element includes at least one diffusion region; At least one of the excitation light and the target primary color light entering the light combination assembly is diffused by the at least one diffusion region and then enters the light uniformization element.

13. The light source system of claim 12, wherein, 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; The first primary color light is diffused by the first diffusion region and then enters the light uniformization element; the second primary color light is diffused by the second diffusion region and then enters the light uniformization element; and the excitation light is diffused by the third diffusion region and then enters the light uniformization element.

14. The light source system of claim 13, wherein, 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 of claim 12, wherein, At least one of the excitation light and the target primary color light is diffused by the at least one diffusion region before being incident into the light uniformizing element, and the chief ray of the at least one of the excitation light and the target primary color light has an incident angle within a target angle range when being incident into the light uniformizing element, so as to be reflected in the light uniformizing element for multiple times.

16. The light source system according to claim 12, wherein, when the light source system emits the target excited light, the second diffusion element is removed from the light path; alternatively, the light conversion element or the second diffusion element comprises a transmission region, and when the light source system emits the target excited light, the transmission region of the light conversion element or the second diffusion element is placed in the light path.

17. The light source system of claim 1, wherein, the light source assembly is capable of emitting the first primary color light, the second primary color light and the excitation light; the light conversion element comprises the first excitation region and / or the second excitation region and the reflection region; the light source system emits the first primary color light, or the combined light of the first primary color light and the excited light generated by the first excitation region, or the combined light of the first primary color light and the second primary color light and the excited light generated by the second excitation region, or the combined light of the first primary color light and the second primary color light, or the combined light of the second primary color light and the excited light generated by the first excitation region, or the combined light of the second primary color light and the excited light generated by the second excitation region, or the combined light of the second primary color light and the excitation light, or the excitation light, in time sequence. alternatively, the light conversion element comprises only the target excitation region; the light source system emits the first primary color light, or the combined light of the first primary color light and the excited light generated by the target excitation region, or the combined light of the second primary color light and the excited light generated by the target excitation region, or the combined light of the first primary color light and the second primary color light, or the combined light of the second primary color light and the excited light generated by the target excitation region, or the combined light of the second primary color light and the excitation light, or the excitation light, in time sequence.

18. The light source system of claim 1, wherein, the excitation light comprises the second excitation light or the first excitation light and the second excitation light, and the light emitting chip corresponding to the second excitation light or the first excitation light and the second excitation light is packaged integrally with the light emitting chip corresponding to any one or all of the primary colors of light.

19. The light source system of claim 1, wherein, the light source assembly comprises a first light source and a dynamic adjustment element, the first light source is capable of generating the first excitation light, and the excitation light comprises the first excitation light; when the first light source emits the first excitation light and the dynamic adjustment element is in the first state, the first excitation light is guided to the target excitation region by the dynamic adjustment element and the light guide assembly; when the first light source emits the first excitation light and the dynamic adjustment element is in the second state, the first excitation light is guided to the light uniformizing element by the dynamic adjustment element, the light guide assembly and / or the combined light assembly, and is emitted after being uniformized by the light uniformizing element.

20. The light source system of claim 2, wherein, The reflective region is any one of a mirror, a polished metal layer or plate, a substrate coated with a reflective film, particles with diffuse reflection, a microstructured reflective layer, a reflective diffuser.

21. A projection apparatus, characterized by, A light source system comprising the light source system of any one of claims 1-20.

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