CN219831606U

CN219831606U - Light machine and projection system

Info

Publication number: CN219831606U
Application number: CN202320743465.0U
Authority: CN
Inventors: 胡飞; 杨佳翼; 侯海雄; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-10-13
Anticipated expiration: 2033-03-30

Abstract

The application relates to the technical field of projection display and discloses a light machine and a projection system, wherein the light machine comprises a light source module and a light modulation component, and the light source module is configured to emit illumination light; the light source module comprises a first light source component and a second light source component, and the second light source component is arranged around the first light source component; the light modulation section is configured to convert the received illumination light into imaging light; when the optical machine is in a working state, the brightness of the second illumination light projected to the light modulation component by the second light source component is larger than the brightness of the first illumination light projected to the light modulation component by the light source main body part. Through the mode, the phenomenon of non-uniformity of the projection picture can be improved, and the display effect is improved.

Description

Light machine and projection system

Technical Field

The present application relates to the field of projection display technologies, and in particular, to an optical engine and a projection system.

Background

With the development of display technology and the popularization of display products, the performance requirements of people on the display products are higher and higher, wherein the better the light uniformity is, the better the brightness uniformity of pictures is, and the uniformity of light in an illumination system directly influences the imaging quality of the display products.

The present inventors have conducted studies, in the related art, as shown in fig. 1 and 2, an LCD light machine 10A includes an LED light panel 101A and a lens 102A, the LED light panel 101A includes a central LED light panel 1011A and an edge LED light panel 1012A surrounding the central LED light panel 1011A, wherein the central LED light panel 1011A is disposed opposite to the lens 102A, a first light beam 108A emitted from the central LED light panel 1011A passes through the lens 102A and passes through a lens assembly of the lens 102A to be finally displayed in a central region 104A of a projection screen 103A, no light is lost in the process, and all light enters the central region 104A of the projection screen 103A; the light beams emitted by the edge LED light panel 1012A cannot be completely collected by the lens 102A due to the deviation of the lens 102A, and meanwhile, the light beams 109A emitted by the edge LED light panel 1012A and capable of being collected by the lens 102 enter the lens 102A obliquely, and finally are displayed in the peripheral area 106A, because of the loss of part of light, the brightness of the peripheral area 106A is lower than that of the central area 104A. Therefore, the projection images 12A projected by the light beam 11A emitted by the LCD light machine 10A are not uniformly distributed, and the average uniformity of the LCD light machine 10A can only be about 50%, the brightness of the LCD light machine 10 in the central area 104A is highest, and the brightness of the transition area 105A surrounding the outer side of the central area 104A and the brightness of the peripheral area 106A are sequentially reduced, so that the brightness of the projection images 103A is uneven.

Disclosure of Invention

Based on the above, the utility model provides an optical machine and a projection system for improving uniformity of light in a projection screen.

In order to solve the technical problems, the utility model adopts a technical scheme that: providing a light engine suitable for a projection system, the light engine comprising a light source module and a light modulation component, the light source module being configured to emit illumination light; the light source module comprises a first light source component and a second light source component, and the second light source component is arranged around the first light source component; the light modulation section is configured to convert the received illumination light into imaging light; when the optical machine is in a working state, the brightness of the second illumination light projected to the light modulation component by the second light source component is larger than the brightness of the first illumination light projected to the light modulation component by the second light source component.

In the above technical scheme, the light source module comprises the first light source module and the second light source module, the second light source module is arranged around the first light source module, and when the optical machine is in a working state, the brightness of the second illumination light projected to the light modulation component by the second light source module is larger than that of the first illumination light projected to the light modulation component by the first light source module, even if the brightness of the second light source module positioned in the peripheral area is larger than that of the first light source module positioned in the central area, the higher brightness of the second light source module positioned in the peripheral area can compensate the light loss entering the lens, so that the phenomenon of uneven projection picture is improved, and the display effect is improved.

In one aspect, the first light source assembly includes at least one first light emitting assembly configured to emit the first illumination light; the second light source assembly comprises at least one second light emitting assembly configured to emit the second illumination light.

In the above technical scheme, the first light source assembly comprises at least one first light emitting assembly, and the second light source assembly comprises at least one second light emitting assembly, so that the number of the first light emitting assemblies and the number of the second light emitting assemblies can be set according to the requirement, and the adjustment can be flexibly performed.

In one aspect, the first light source assembly includes a first lens assembly configured to collect and/or collimate the first illumination light emitted by the at least one first light emitting assembly; the second light source assembly includes a second lens assembly configured to collect and/or collimate the second illumination light emitted by the at least one second light emitting assembly.

In the above technical solution, by setting the first lens assembly to collect and/or collimate the first illumination light emitted by the first light source assembly and setting the second lens assembly to collect and/or collimate the second illumination light emitted by the second light source assembly, as much illumination light (the first illumination light and the second illumination light) as possible can be incident on the light modulation component to be utilized, thereby improving the light utilization rate.

In one of the technical schemes, the optical machine comprises at least one first driving circuit and at least one second driving circuit; the at least one first driving circuit is electrically connected with the at least one first light emitting component in a one-to-one correspondence manner, and each first driving circuit is configured to provide a first current for the corresponding first light emitting component; the at least one second driving circuit is electrically connected with the at least one second light-emitting component in a one-to-one correspondence manner, and each second driving circuit is configured to provide a second current to the corresponding second light-emitting component; the second current is greater than the first current.

In the above technical solution, the brightness of the first light emitting component and the second light emitting component is controlled by controlling the current of the first light emitting component and the second light emitting component, that is, the brightness of the light emitting components is differentiated by controlling the current of the light emitting components in different areas, and then the phenomenon of non-uniformity of the projection picture projected by the projection system is improved by controlling the current of the second light emitting component in the peripheral area to be higher than the current of the first light emitting component in the central area, so as to improve the display effect.

In one of the technical schemes, the optical machine comprises at least one first driving circuit and at least one second driving circuit; the at least one first driving circuit is electrically connected with the plurality of first light emitting components and is configured to provide first current for the plurality of first light emitting components; the at least one second driving circuit is electrically connected with the plurality of second light emitting components and is configured to provide a second current to the plurality of second light emitting components; the second current is greater than the first current.

In the technical scheme, at least one first driving circuit is electrically connected with the plurality of first light-emitting components and at least one second driving circuit is electrically connected with the plurality of second light-emitting components, so that the plurality of first light-emitting components and the plurality of second light-emitting components can be driven to emit light respectively, the control efficiency can be improved, the wiring is convenient, and the process is simplified.

In one of the technical solutions, the optical engine includes a first driving circuit and a second driving circuit, where the first driving circuit is electrically connected to all the first light emitting components and configured to provide a first current to all the first light emitting components; the second driving circuit is electrically connected with all the second light emitting components and is configured to provide a second current to all the second light emitting components; the second current is greater than the first current.

In the technical scheme, the first driving circuit and the second driving circuit are arranged to drive all the first light-emitting components to emit light and all the second light-emitting components to emit light respectively, so that the control efficiency can be greatly improved, the wiring is convenient, and the process is simplified.

In one of the technical schemes, the photoelectric conversion efficiency of the at least one second light emitting component is greater than that of the at least one first light emitting component.

In the above technical scheme, by setting the photoelectric conversion efficiency of at least one second light emitting component to be greater than that of at least one first light emitting component, the light emitting components with different photoelectric conversion efficiencies can be arranged according to different areas, wherein the photoelectric conversion efficiency of the second light emitting component in the peripheral area is high, so that the brightness of the second illumination light projected to the light modulating component by the second light emitting component is high, the higher brightness of the second light source component can compensate the light loss entering the lens, the phenomenon of non-uniformity of the projected picture can be improved, the display effect is improved, and the structure is simple.

In one of the embodiments, the first lens assembly includes at least one first collimating lens, and the second lens assembly includes at least one second collimating lens; the at least one first collimating lens is arranged in one-to-one correspondence with the at least one first light emitting component, and the first collimating lens is configured to collimate the first illumination light emitted by the corresponding first light emitting component; the at least one second collimating lens is arranged in one-to-one correspondence with the at least one second light emitting component, and the second collimating lens is configured to collimate the second illumination light emitted by the corresponding second light emitting component; the first focal length of the first collimating lens is smaller than the second focal length of the second collimating lens.

In the above technical solution, on one hand, by setting at least one first collimating lens to collimate the first illumination light emitted by the first light source component and setting at least one second collimating lens to collimate the second illumination light emitted by the second light source component, the projected first illumination light and second illumination light are parallel or nearly parallel, so that as much first illumination light and second illumination light as possible can be utilized, and the light utilization rate is improved; on the other hand, the first focal length of the first collimating lens is smaller than the second focal length of the second collimating lens, namely, the angle of the second collimating lens is smaller than the angle of the first collimating lens, so that the optical expansion of the second light source assembly is smaller than that of the first light source assembly, the optical expansion of the second light source assembly can be matched with a subsequent light modulation component, the light utilization rate of the second light source assembly located in a peripheral area is improved, and a uniform effect is achieved.

In one embodiment, the first lens assembly includes at least one first collection lens, and the second lens assembly includes at least one second collection lens; the at least one first collecting lens is arranged in one-to-one correspondence with the at least one first light emitting component, and the first collecting lens is configured to collect the first illumination light emitted by the corresponding first light emitting component; the at least one second collecting lens is arranged in one-to-one correspondence with the at least one second light emitting component, the second collecting lens is configured to collect the second illumination light emitted by the corresponding second light emitting component, and the first focal length of the first collecting lens is smaller than the second focal length of the second collecting lens.

In the above technical solution, on the one hand, by setting the first collecting lens to collect the first illumination light emitted by the first light source assembly and setting the second collecting lens to collect the second illumination light emitted by the second light source assembly, the illumination light (the first illumination light and the second illumination light) emitted by the first light source assembly and the second light source assembly in different directions can be collected as much as possible, so as to improve the utilization efficiency of the illumination light (the first illumination light and the second illumination light) emitted by the first light source assembly and the second light source assembly; on the other hand, by setting the first focal length of the first collecting lens smaller than the second focal length of the second collecting lens, namely, the angle of the second collecting lens smaller than the angle of the first collecting lens, the optical expansion of the second light source assembly is smaller than that of the first light source assembly, so that the optical expansion of the second light source assembly can be matched with that of a subsequent optical modulation component or lens, the light utilization rate of the second light source assembly positioned in a peripheral area is improved, and a uniform effect is achieved.

In one of the technical schemes, the area of the light-emitting surface of the first light-emitting component is larger than that of the light-emitting surface of the second light-emitting component.

In the above technical solution, the area of the light emitting surface of the first light emitting component is larger than the area of the light emitting surface of the second light emitting component, that is, the area of the light emitting surface of the second light emitting component in the peripheral area is small, so that the optical expansion of the second light source component in the peripheral area is small, and the second light source component is matched with the optical expansion of the subsequent optical modulation component or lens, thereby improving the light utilization rate of the peripheral area, solving the technical problem of darkness of the peripheral area, and achieving uniform technical effect.

In one of the embodiments, the first light emitting component includes a light emitting diode, and the second light emitting component includes a laser.

In the above technical scheme, the first light-emitting component comprises the light-emitting diode, the second light-emitting component comprises the laser, and the brightness of the laser emitted by the laser is higher than that of the light emitted by the light-emitting diode, so that the light loss entering the lens can be compensated, the phenomenon of non-uniformity of the projection picture is improved, and the display effect is improved.

In order to solve the technical problems, the application adopts another technical scheme that: providing a light machine suitable for a projection system, wherein the light machine comprises a light source module and a light modulation component, the light source module comprises a plurality of light source assemblies, the plurality of light source assemblies are concentrically arranged in a surrounding manner, and the light source assemblies are configured to emit illumination light; the light modulation part is configured to convert the received illumination light emitted by the light source assemblies into imaging light; the luminance of the illumination light projected to the light modulation member by the light source modules gradually increases in a direction from the center to the outer periphery of the light source module.

In the above technical scheme, through setting up the light source module and including a plurality of light source subassembly, a plurality of light source subassemblies encircle the setting with one heart, a plurality of light source subassemblies throw to the luminance of a plurality of illumination lights of light modulating part is along the direction from the center of light source module to periphery increase gradually, can make along the direction from the center of light source module to periphery a plurality of light source subassemblies throw to the luminance slow transition of a plurality of illumination lights of light modulating part increases gradually, avoids the condition of luminance mutation, does benefit to the homogeneity that improves the projection picture.

In one aspect, each of the light source assemblies includes at least one light emitting assembly and at least one lens assembly configured to collect and/or collimate the illumination light emitted by the light emitting assembly.

In the technical scheme, the lens assembly is arranged to collect and/or collimate the illumination light emitted by the light source assembly, so that as much illumination light as possible can be incident on the light modulation component to be utilized, and the light utilization rate is improved.

In one aspect, the light engine includes a plurality of driving circuits, where the driving circuits are electrically connected to the light emitting components in a one-to-one correspondence, each of the driving circuits is configured to supply current to the corresponding light emitting component, and the currents gradually increase along a direction from a center to an outer periphery of the light source module.

In the above technical solution, by setting each driving circuit configured to supply current to the corresponding light emitting component, along the direction from the center to the periphery of the light source module, the currents gradually increase, so that the brightness of the illumination light projected to the light modulating component by the light source components gradually increases along the direction from the center to the periphery of the light source module, thereby avoiding the condition of abrupt brightness change and being beneficial to improving the uniformity of the projected picture.

In one of the above technical solutions, the lens assembly includes a plurality of collimating lenses, each of which is disposed in one-to-one correspondence with each of the plurality of light emitting assemblies, and the collimating lenses are configured to collimate the illumination light emitted by the corresponding light emitting assembly, and a plurality of focal lengths of the plurality of collimating lenses gradually increase along a direction from a center to an outer periphery of the light source module.

In the above technical scheme, by setting the direction from the center of the light source module to the periphery, the focal lengths of the collimating lenses are gradually increased, so that the optical expansion amounts of the light source modules projected to the light modulation component are gradually increased along the direction from the center of the light source module to the periphery, and the brightness of the illumination light projected to the light modulation component by the light source modules is gradually increased along the direction from the center of the light source module to the periphery, thereby avoiding the condition of abrupt brightness change and being beneficial to improving the uniformity of the projected picture.

In one aspect, the lens assembly includes a plurality of collecting lenses, each of the collecting lenses is disposed in one-to-one correspondence with each of the light emitting assemblies, and the collecting lenses are configured to collect the illumination light emitted by the corresponding light emitting assembly, and a plurality of focal lengths of the collecting lenses gradually increase along a direction from a center to an outer periphery of the light source module.

In the above technical scheme, through setting up along the direction from the center of light source module to periphery, a plurality of focal lengths of a plurality of collecting lenses increase gradually, can make a plurality of light source subassembly throw a plurality of optical expansions to the light modulation part slowly transition increase along the direction from the center of light source module to periphery, and then make a plurality of light source subassembly throw a plurality of illumination light of light modulation part's luminance slowly transition increase along the direction from the center of light source module to periphery, avoid the condition of luminance mutation, do benefit to the homogeneity that improves the projection picture.

In one of the embodiments, the areas of the light emitting surfaces of the light emitting components are gradually reduced along the direction from the center to the periphery of the light source module.

In one of the technical schemes, the areas of the light emitting surfaces of the light emitting assemblies are gradually reduced along the direction from the center to the periphery of the light source module, so that the optical expansion amounts of the light emitting assemblies projected to the light modulation component are gradually increased along the direction from the center to the periphery of the light source module, the brightness of the illumination light projected to the light modulation component by the light source assemblies is gradually increased along the direction from the center to the periphery of the light source module, the condition of abrupt change of brightness is avoided, and the uniformity of a projection picture is improved.

In order to solve the technical problems, the application adopts another technical scheme that: there is provided a projection system comprising a light engine and a lens, wherein the light engine is provided in any of the above aspects, and the lens is configured to project the imaging light to a screen.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

FIG. 1 is a light path diagram of a prior art LCD projection system;

FIG. 2 is a schematic diagram of a specific configuration of the LCD projection system of FIG. 1;

FIG. 3 is a schematic diagram of a projection system according to embodiment 1 of the present application;

fig. 4 is a schematic structural diagram of a region division form of a light source module according to some embodiments of the present application;

fig. 5 is a schematic structural diagram of a region division form of a light source module according to other embodiments of the present application;

fig. 6 is a schematic structural diagram of an optical engine according to embodiment 2 of the present application;

fig. 7 is a schematic structural diagram of a light source module according to some embodiments of the present application;

FIG. 8 is a schematic diagram illustrating a structure of a light source module in a projection system with an optical path offset from an optical axis according to some embodiments of the present application;

fig. 9 is a schematic structural diagram of an optical engine according to embodiment 3 of the present application;

FIG. 10 is a schematic view of the first collimating lens and the second collimating lens of FIG. 9 projected onto a light emitting assembly;

fig. 11 is a schematic structural diagram of an optical engine according to embodiment 4 of the present application;

fig. 12 is a schematic structural diagram of a region division form of a light source module according to some embodiments of the present application;

fig. 13 is a schematic structural diagram of a region division mode of a light source module according to other embodiments of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Aiming at the problems in the background technology, the inventor of the application divides the light source module into areas and adjusts different brightness aiming at different areas, thereby improving the uniformity of the display picture. The following description is made with reference to the accompanying drawings.

Example 1

Referring to fig. 3, a projection system 100 is provided in embodiment 1 of the present application, and the projection system 100 may include a light machine 1 and a lens 2, wherein the light machine 1 is configured to emit imaging light, and the lens 2 is disposed on an outgoing light path of the imaging light and is configured to project the imaging light to a screen.

The light engine 1 comprises a light source module 10 and a light modulation component 20, wherein the light source module 10 is configured to emit illumination light, and the light modulation component 20 is configured to convert received illumination light into imaging light.

The light source module 10 may emit illumination light, which may also be referred to as working light, and in the embodiment of the present application, the color of the illumination light is white, and the illumination light may be formed by exciting fluorescence by using excitation light. Specifically, in some embodiments, the light source module 10 may include a plurality of light emitting assemblies 11, where the light emitting assemblies 11 further include light emitting elements (not shown) and a phosphor layer (not shown), and in some embodiments, the phosphor layer is disposed on a surface of the light emitting elements, and in other embodiments, the plurality of light emitting elements form a light emitting element array, and the phosphor layer covers the light emitting element array, that is, the phosphor layer is disposed not only on the surface of the light emitting elements but also between adjacent light emitting elements. The Light Emitting element may be an Organic Light-Emitting Diode (OLED) chip or an inorganic Light-Emitting Diode (LED) chip, and specifically may be selected according to actual needs. The phosphor layer is configured to receive at least a portion of the excitation light emitted by the light emitting element to be excited to generate lasing light, and the remaining portion of the excitation light and the lasing light to mix to generate illumination light. The color of the phosphor layer is related to the color of the excitation light emitted by the light emitting element, and the two colors are usually complementary colors, i.e. white light is generated after mixing. For example, in some embodiments, the light emitting element is a blue LED chip, and the excitation light emitted by the light emitting element is blue, and then the phosphor layer is a yellow phosphor layer, and the yellow phosphor layer emits yellow light after being excited by a portion of the blue excitation light, and the remaining portion of the blue excitation light and the yellow light are mixed to form white light, i.e., illumination light. In other embodiments, other complementary color light emitting elements and phosphor layers may be used, as the application is not limited in this regard. In addition, the illumination light can be generated by combining an ultraviolet light or ultraviolet light LED chip and an RGB fluorescent powder layer. Specifically, in this embodiment 1, the light-emitting element emits blue excitation light, and the phosphor layer is a yellow phosphor layer. According to the embodiment of the application, the illumination light is emitted in a mode of exciting the fluorescent powder by the excitation light, the structure is simple, the cost is low, and the production cost can be saved.

Further, in some embodiments, the light source module 10 may further include a substrate 13, and the plurality of light emitting assemblies 11 are disposed on the substrate 13. In some embodiments, the substrate 13 may be a good heat conductor configured to conduct heat generated by the light emitting components 11, and the substrate 13 is made of metal, in a specific embodiment, the substrate 13 is an aluminum plate, further, the substrate 13 has a polished surface or a reflective film, and is configured to reflect light emitted by the light emitting components 11 toward the substrate 13, so that on one hand, the light utilization rate can be improved, and on the other hand, the generation of parasitic light in the light engine 1 can be reduced, and the display effect can be improved.

Further, in some embodiments, referring to fig. 4 and 5 together, the light source module 10 has a central region 12 and a peripheral region 14 surrounding the central region 12, wherein the central region 12 refers to at least a partial region including a center, corresponding to the peripheral region, and is not a point, and in some embodiments, a ratio of an area of orthographic projection of the central region 12 to the light source module 10 to an area of a maximum orthographic projection of the light source module 10 is greater than or equal to 60% and less than 100%; further, in some embodiments, the area of the orthographic projection of the central region to the light source module 10 is greater than or equal to 80% and less than 100% of the area of the largest orthographic projection of the light source module 10; further, in some embodiments, the area of the front projection of the central area 12 to the light source module 10 is greater than or equal to 90% and less than 100% of the area of the largest front projection of the light source module 10, and it should be noted that, the "front projection" in the present application refers to the projection along the direction perpendicular to the light emitting surface of the light source module 10, i.e. the projection along the direction perpendicular to the surface of the light emitting component 11 away from the substrate 13. The shape and division of the central region 12 and the peripheral region 14 are not limited, and for example, in some embodiments, as shown in fig. 4, the central region 12 is a circular region, the peripheral region 14 is an annular region, and the central region 12 and the peripheral region 14 are concentrically arranged, so that the division of the regions can be simplified; in other embodiments, as shown in fig. 5, the central area 12 and the peripheral area 14 are rectangular areas, and the central area 12 and the peripheral area 14 are concentrically arranged, and since the light emitting surface of the light emitting component 11 is rectangular, the installation of the light emitting component 11 can be facilitated by making the central area 12 and the peripheral area 14 rectangular areas. It will be appreciated that the number of the central area 12 and the peripheral area 14 is not limited, and may be divided according to need, as shown in fig. 5, the light source module 10 has 4 sub-central areas 12a and 12 sub-peripheral areas 14a, and the 4 sub-central areas 12a may be regarded as one central area 12, and the 12 sub-peripheral areas 14a may be regarded as one peripheral area 14; of course, other divisions are possible, and the application is not limited in this regard. The light source module 10 may be divided into a first light source module 10a and a second light source module 10b according to the positions, that is, the light source module 10 includes a first light source module 10a and a second light source module 10b, the first light source module 10a is located in a central area of the light source module 10, the second light source module 10b is located in a peripheral area of the second light source module 10b, and the second light source module 10b is disposed around the first light source module 10 a. It should be noted that, in the embodiment of the present application, if the light emitting element 11 is located in both the central area 12 and the peripheral area 14, the light emitting element 11 is divided into which area the light emitting element 11 is located according to which area the light emitting element 11 is located in a large ratio, for example, 2/3 of the light emitting element 11 is located in the central area 12 and 1/3 of the light emitting element 11 is located in the peripheral area 14, and the following embodiment encounters the similar situation to do the same.

The light emitting components 11 are divided into a first light emitting component 11a and a second light emitting component 11b according to the positions, wherein at least one first light emitting component 11a is disposed in the central area 12, and at least one second light emitting component 11b is disposed in the peripheral area 14, so that the first light source component 10a comprises at least one first light emitting component 11a, and the second light source component 10b comprises at least one second light emitting component 11b. In order to make the projection image of the light machine 1 more uniform, in some embodiments of the present application, when the light machine 1 is in an operating state, the brightness of the second illumination light projected by the second light source assembly 10b onto the light modulation component 20 is greater than the brightness of the first illumination light projected by the first light source assembly 10a onto the light modulation component 20, and the light machine 1 is in the operating state, that is, the light machine 1 is turned on by the light machine 1 switch, so that the light machine 1 generates the imaging light. In some embodiments, brightness refers to the luminous flux per unit area in solid angle along the normal direction in nits, i.e., 1 lumen per square meter per sphericity.

In order to achieve that the brightness of the second illumination light projected by the second light source assembly 10b onto the light modulation part 20 is greater than the brightness of the first illumination light projected by the first light source assembly 10a onto the light modulation part 20, the current and/or photoelectric conversion efficiency and/or the etendue of the first light source assembly 10a and the second light source assembly 10b may be adjusted, wherein the etendue refers to the product of the cross-sectional area of the light beam and the projection of the spatial solid angle enclosed by the light beam onto the cross-sectional normal.

The optical machine 1 provided in embodiment 1 of the present application further includes a driving circuit 30, where the driving circuit 30 is electrically connected to the light source module 10 and configured to provide current to the light source module 10.

Alternatively, in some embodiments, the number of the driving circuits 30 is plural and configured to control the current supply of the first light emitting component 11a and the second light emitting component 11b, respectively. The driving circuit 30 is divided into a first driving circuit and a second driving circuit according to the difference of electrical connection with the light emitting elements 11 of different regions, and specifically, the driving circuit 30 includes at least one first driving circuit and at least one second driving circuit. In some embodiments, at least one first driving circuit is electrically connected to at least one first light emitting component 11a in a one-to-one correspondence, and each first driving circuit is configured to provide a first current to the corresponding first light emitting component 11 a; the at least one second driving circuit is electrically connected with the at least one second light emitting component 11b, and each second driving circuit is configured to provide a second current to the corresponding second light emitting component 11b, so that currents can be provided to the light emitting components 11 in different areas in a finely differentiated manner, and the brightness of the projection picture projected by the optical machine 1 can be more uniform. In embodiment 1 of the present application, the second current provided to the second light emitting component 11b is greater than the first current provided to the first light emitting component 11a, so that the brightness of the second illumination light projected to the light modulating component 20 by the second light source component 10b is greater than the brightness of the first illumination light projected to the light modulating component 20 by the first light source component 10a, therefore, the higher brightness of the second light source component 10b located in the peripheral area 14 can compensate the light loss entering the lens 2, thereby reducing the phenomenon of uneven brightness of the projected image and improving the display effect.

Alternatively, in other embodiments, in order to improve the control efficiency, facilitate the wiring and simplify the process, the effect of the brightness difference of different areas may be reduced without adjusting the current of the light emitting component 11 in a one-to-one correspondence manner.

Specifically, in some embodiments, at least one first driving circuit is electrically connected to the plurality of first light emitting components 11a and configured to provide a first current to the plurality of first light emitting components 11a, and at least one second driving circuit is electrically connected to the plurality of second light emitting components 11b and configured to provide a second current to the plurality of second light emitting components 11 b. In this way, control efficiency can be improved, wiring can be facilitated, and a process can be simplified.

Further, in some embodiments, the optical engine 1 includes a first driving circuit and a second driving circuit; wherein the first driving circuit is electrically connected to all the first light emitting components 11a and configured to supply the first current to all the first light emitting components 11 a; the second driving circuit is electrically connected to all the second light emitting components 11b, and is configured to be electrically connected to all the second light emitting components 11 b; the second current is greater than the first current. That is, the plurality of first light emitting devices 11a located in the central region 12 may be controlled using the same first driving circuit, and the plurality of second light emitting devices 11b located in the peripheral region 14 may be controlled using the same second driving circuit, the plurality of first light emitting devices 11a located in one sub-central region 12a may be controlled by one first driving circuit, and the plurality of second light emitting devices 11b located in one sub-peripheral region 14a may be controlled by one second driving circuit, so that only 2 driving circuits 30 may be required, and the control efficiency may be greatly improved, the wiring may be facilitated, and the process may be simplified.

Alternatively, in other embodiments, the effect of improving the uniformity of the projection screen may also be achieved by using the light emitting components 11 with different photoelectric conversion efficiencies in different regions. Specifically, the photoelectric conversion efficiency of the at least one second light emitting component 11b is greater than that of the at least one first light emitting component 11a, so that the light emitting components 11 with different photoelectric conversion efficiencies can be arranged according to different areas, wherein the photoelectric conversion efficiency of the second light emitting component 11b located in the peripheral area 14 is greater than that of the first light emitting component 11a located in the central area 12, therefore, the brightness of the second illumination light projected by the second light emitting component 11b to the light modulating component 20 is large, and the higher brightness of the second light source component 10b can compensate the light loss entering the lens 2, so that the phenomenon of uneven projection images can be improved, the display effect can be improved, and the structure is simple.

Alternatively, in other embodiments, the effect of improving the uniformity of the projected picture may also be achieved by using different light emitting assemblies 11 in different areas. Specifically, the first light emitting component 11a includes an LED, and the second light emitting component 11b includes a laser, and since the brightness of the laser emitted by the laser is higher than the brightness of the light emitted by the LED, the light loss entering the lens 2 can be compensated, so that the phenomenon of non-uniformity of the projection screen can be improved, and the display effect can be improved.

Optionally, in some embodiments, the etendue of the second light source module 10b is smaller than the etendue of the first light source module 10a, and by setting the etendue of the second light source module 10b smaller than the etendue of the first light source module 10a, the etendue of the second light source module 10b can be matched with the subsequent light modulation component 20, so that the light utilization rate of the second light source module 10b is improved, and a uniform effect is achieved.

Specifically, in some embodiments, please continue to refer to fig. 3, the light source module 10 includes a lens assembly 15, where the lens assembly 15 is disposed on an outgoing light path of the light emitting assembly 11 and configured to collect and/or collimate the illumination light, so that as much illumination light as possible can be incident on the light modulating component 20 to be utilized, and light utilization efficiency is improved. The lens assembly 15 may be divided into a first lens assembly 15a and a second lens assembly 15b according to the location, the first lens assembly 15a is located in the central area 12, the second lens assembly 15b is located in the peripheral area 14, i.e. the first light source assembly 10a comprises the first lens assembly 15a, the first lens assembly 15a is configured to collect and/or collimate the first illumination light emitted by the at least one first light emitting assembly 11a to form a concentrated first illumination light and/or collimated illumination light; the second light source assembly 10b comprises a second lens assembly 15b, the second lens assembly 15b being configured to collect and/or collimate the second illumination light emitted by the at least one second light emitting assembly 11b to form a concentrated second illumination light and/or a collimated second illumination light.

In some embodiments, the first lens assembly 15a includes at least one first collection lens 150a and/or at least one first collimating lens 151a, and in one embodiment, the first lens assembly 15a includes at least one first collection lens 150a; in another embodiment, the first lens assembly 15a includes at least one first collimating lens 151a; in another embodiment, the first lens assembly 15a includes at least one first collection lens 150a and at least one first collimating lens 151a. In embodiment 1 of the present application, the first lens assembly 15a includes at least one first collecting lens 150a and at least one first collimating lens 151a, wherein the at least one first collecting lens 150a is disposed between the at least one first light emitting assembly 11a and the at least one first collimating lens 151a, and is configured to collect the first illumination light emitted by the at least one first light emitting assembly 11a to form a concentrated first illumination light. The at least one first collecting lens 150a can collect the first illumination light emitted by the at least one first light emitting component 11a in different directions as much as possible, so as to improve the utilization efficiency of the first illumination light emitted by the at least one first light emitting component 11a, and collect and project the first illumination light emitted by the at least one first light emitting component 11a to the at least one first collimating lens 151a as much as possible. The second lens assembly 15b includes at least one second collecting lens 150b and at least one second collimating lens 151b, wherein the at least one second collecting lens 150b is disposed between the at least one second light emitting assembly 11b and the at least one second collimating lens 151b, and is configured to collect the second illumination light emitted by the at least one second light emitting assembly 11b to form a concentrated second illumination light. The at least one second collecting lens 150b can collect the second illumination light emitted by the at least one second light emitting component 11b in different directions as much as possible, so as to improve the utilization efficiency of the second illumination light emitted by the at least one second light emitting component 11b, and collect and project the second illumination light emitted by the at least one second light emitting component 11b to the at least one second collimating lens 151b as much as possible. In some embodiments, the at least one first collecting lens 150a and the at least one second collecting lens 150b may be integrally formed, and made of glass, silica gel or resin.

The at least one first collimating lens 151a is configured to collimate the light beam emitted by the at least one first light emitting component 11a and/or the at least one first collecting lens 150a with a divergent angle. The at least one second collimating lens 151b is configured to collimate the light beam emitted by the at least one second light emitting component 11b and/or the at least one second collecting lens 150b with a divergent angle. The term "collimated light" refers to parallel or nearly parallel light rays, and the output of the at least one first collimating lens 151a and the at least one second collimating lens 151b allows as much illumination light (first illumination light and second illumination light) as possible to be incident on the subsequent light modulation section 20 for use. In some embodiments, the at least one first collimating lens 151a and the at least one second collimating lens 151b may be integrally formed, so as to include a convex lens, a concave lens, or a fresnel lens, or any combination thereof, and the material of the at least one first collimating lens and the at least one second collimating lens is glass, silica gel, or resin.

In other embodiments, the first lens assembly 15a includes at least one first collection lens 150a or at least one first collimating lens 151a. The at least one first collecting lens 150a is configured to collect the first illumination light emitted by the at least one first light emitting component 11a, so as to improve the utilization efficiency of the first illumination light emitted by the at least one first light emitting component 11 a. The at least one first collimating lens 151a is configured to collimate the light beam emitted from the at least one first light emitting element 11a with a certain divergence angle, so that as much first illumination light as possible can be incident on the light modulating component 20 to be utilized. The second lens assembly 15b includes at least one second collecting lens 150b or at least one second collimating lens 151b. The at least one second collecting lens 150b is configured to collect the second illumination light emitted by the at least one second light emitting component 11b, so as to improve the utilization efficiency of the second illumination light emitted by the at least one second light emitting component 11 b. The at least one second collimating lens 151b is configured to collimate the light beam emitted from the at least one second light emitting element 11b with a certain divergence angle, so that as much second illumination light as possible can be incident on the light modulating member 20 to be utilized.

Example 2

Referring to fig. 6, embodiment 2 of the present application provides an optical engine 1, where the optical engine 1 includes a light source module 10 and a light modulation component 20, the optical engine 1 provided in embodiment 2 of the present application is substantially the same as the optical engine 1 provided in embodiment 1 of the present application, in which the difference of brightness in different areas is reduced by adjusting the current of the light emitting components 11 in different areas, and the difference of brightness in illumination light projected to the light modulation component 20 by the light source module 10 in different areas is reduced by adjusting the area of the light emitting surface of the light emitting components 11 in different areas in embodiment 2 of the present application.

Specifically, in some embodiments, the light source module 10 may be divided into a first light source module 10a and a second light source module 10b according to the location, where the first light source module 10a includes a first lens module 15a and the second light source module 10b includes a second lens module 15b.

In some embodiments, the first lens assembly 15a includes at least one first collecting lens 150a and/or at least one first collimating lens 151a, the number of the first collecting lenses 150a may be the same as or different from the number of the first light emitting assemblies 11a, and in order to collect the first illumination light emitted by each of the first light emitting assemblies 11a, in this embodiment, the first light emitting assemblies 11a correspond to one first collecting lens 150a, so the number of the first collecting lenses 150a may be greater than or equal to the number of the first light emitting assemblies 11a, in some embodiments, the number of the first collecting lenses 150a is the same as the number of the first light emitting assemblies 11a, and at least one first collecting lens 150a and at least one first light emitting assembly 11a are disposed in a one-to-one correspondence; the number of the first collimating lenses 151a may be the same as or different from the number of the first light emitting elements 11a, and in order to collimate the first illumination light emitted by each of the first light emitting elements 11a, in this embodiment, the first light emitting elements 11a correspond to one first collimating lens 151a, so that the number of the first collimating lenses 151a may be greater than or equal to the number of the first light emitting elements 11a, and in some embodiments, the number of the first collimating lenses 151a is the same as the number of the first light emitting elements 11a, and at least one first collimating lens 151a and at least one first light emitting element 11a are disposed in a one-to-one correspondence. The arrangement of the components in one-to-one correspondence with the components in the present application means that each component and at least part of the area of the orthographic projection of the corresponding component to the light source module 10 overlap, and deviation occurs between the two due to the influence of a process error, so long as most of the area of the orthographic projection of each component and the corresponding component to the light source module 10 overlap, for example, more than 50% of the area overlaps, the two may be considered to be correspondingly arranged, and specifically, the area of the overlapping area may occupy 55%,60%, 65%, 70%, 75%, 80%, 85%, 90%, 95% or 100% of the area of one of the components.

In embodiment 2 of the present application, the first lens assembly 15a includes at least one first collecting lens 150a and at least one first collimating lens 151a, the at least one first collecting lens 150a and the at least one first light emitting assembly 11a are disposed in a one-to-one correspondence, and the first collecting lens 150a is disposed between the corresponding first light emitting assembly 11a and the corresponding first collimating lens 151a and is configured to collect and project the first illumination light emitted by the corresponding first light emitting assembly 11a to the corresponding first collimating lens 151a.

The second lens assembly 15b includes at least one second collecting lens 150b and/or at least one second collimating lens 151b, the number of the second collecting lenses 150b may be the same as or different from the number of the second light emitting assemblies 11b, and in order to collect the second illumination light emitted by each second light emitting assembly 11b, in the embodiment of the present application, the second light emitting assemblies 11b correspond to one second collecting lens 150b, so the number of the second collecting lenses 150b may be greater than or equal to the number of the second light emitting assemblies 11b, in some embodiments of the present application, the number of the second collecting lenses 150b is the same as the number of the second light emitting assemblies 11b, and at least one second collecting lens 150b and at least one second light emitting assembly 11b are disposed in a one-to-one correspondence; the number of the second collimating lenses 151b may be the same as or different from the number of the second light emitting components 11b, and in order to collimate the second illumination light emitted by each second light emitting component 11b, in the embodiment of the present application, each second light emitting component 11b corresponds to one second collimating lens 151b, so that the number of the second collimating lenses 151b may be greater than or equal to the number of the second light emitting components 11b, and in some embodiments of the present application, the number of the second collimating lenses 151b is the same as the number of the second light emitting components 11b, and at least one second collimating lens 151b and at least one second light emitting component 11b are disposed in a one-to-one correspondence.

In embodiment 2 of the present application, the second lens assembly 15b includes at least one second collecting lens 150b and at least one second collimating lens 151b, at least one second collecting lens 150b and at least one second light emitting assembly 11b are disposed in a one-to-one correspondence, and the second collecting lens 150b is disposed between the corresponding second light emitting assembly 11b and the corresponding second collimating lens 151b and is configured to collect and project the second illumination light emitted by the corresponding second light emitting assembly 11b to the corresponding second collimating lens 151b.

Specifically, in embodiment 2 of the present application, the etendue of the second light source module 10b is smaller than that of the first light source module 10 a. Referring to fig. 7, the area of the light emitting surface of the first light emitting component 11a is larger than that of the second light emitting component 11 b. The larger the area of the light emitting surface of the first light emitting component 11a is, the larger the range of the collimated first illumination light can be directly injected into the light modulating component 20, the smaller the area of the light emitting surface of the second light emitting component 11b is, the smaller the range of the collimated second illumination light is, the higher the efficiency of entering the light modulating component 20 is, the smaller the loss is, therefore, the area of the light emitting surface of the second light emitting component 11b positioned in the peripheral region is smaller, the optical expansion of the second light source component 10b is matched with the optical expansion of the subsequent light modulating component 20 or the lens 2, the light utilization rate of the peripheral region is improved, the technical problem that the peripheral region is darker is solved, and the uniform technical effect is achieved.

It will be appreciated that, for a projection system in which the optical path deviates from the optical axis, since the optical path deviates from the optical axis, the brightness of both sides is uneven, for example, as shown in fig. 8, the light source module 10 may be configured such that the area of the light emitting surface of the light emitting component 11 in the first region 14b located in the peripheral region 14 is set to be larger than the area of the light emitting surface of the light emitting component 11 in the second region 14c located in the peripheral region 14, and the optical expansion of the second light source component 10b in the second region 14c located in the peripheral region 14 may be smaller by reducing the area of the light emitting surface of the light emitting component 11 in the second region 14c located in the peripheral region 14, so that it matches with the optical expansion of the subsequent light modulating component 20 or the lens 2, thereby achieving a uniform technical effect. Therefore, the technical solution provided in embodiment 2 of the present application can be flexibly configured according to the actual situation, so as to achieve the purpose of reducing the brightness difference of the projection pictures projected by different light emitting assemblies 11 on the same light source module 10.

Example 3

Fig. 9 and fig. 10 are schematic diagrams of an optical engine 1 according to embodiment 3 of the present application, and fig. 10 is a schematic diagram of a structure in which a first collimating lens 151a and a second collimating lens 151b in fig. 9 are projected onto a light emitting component 11. An embodiment 3 of the present application provides an optical engine 1, where the optical engine 1 includes a light source module 10 and a light modulation component 20, and the structure of the optical engine 1 provided in the embodiment 3 of the present application is substantially the same as that of the optical engine 1 provided in the embodiment 2, and the difference is that a first focal length of a first collimating lens 151a is smaller than a second focal length of a second collimating lens 151b and/or a third focal length of a first collecting lens 150a is smaller than a fourth focal length of a second collecting lens 150b, so as to achieve an effect of adjusting and controlling an optical expansion of the light source module 10 in different areas, and further reducing a brightness difference of illumination light projected by the light source module 10 in different areas to the light modulation component 20. Embodiment 3 of the present application will be described taking the example that the first focal length of the first collimating lens 151a is smaller than the second focal length of the second collimating lens 151 b.

Specifically, in some embodiments, the first focal length f of the first collimating lens 151a corresponding to the first light emitting component 11a is smaller than the second focal length f of the second collimating lens 151b corresponding to the second light emitting component 11 b. Because the first focal length f value of the first collimating lens 151a is small, the range of the first illumination light collimated by the first collimating lens 151a is large, the first illumination light can be directly injected into the light modulation component 20, the second focal length f value of the second collimating lens 151b is small, the range of the second illumination light collimated by the second collimating lens 151b is small, the higher the efficiency of entering the light modulation component 20 is, the smaller the loss is, and because the angle of the second collimating lens 151b is smaller than the angle of the first collimating lens 151a, the optical expansion of the second light source component 10b is smaller than the optical expansion of the first light source component 10a, so that the optical expansion of the second light source component 10b can be matched with the subsequent light modulation component 20, the light utilization rate of the second light source component 10b positioned in the peripheral area is improved, and the uniform effect is achieved.

It is understood that the manner of adjusting the focal lengths of the first collecting lens 150a and the second collecting lens 150b is the same as the principle of adjusting the focal lengths of the first collimating lens 151a and the second collimating lens 151b, and will not be described herein.

Example 4

Referring to fig. 11-13, embodiment 4 of the present application provides an optical engine 1, the optical engine 1 includes a light source module 10 and a light modulation component 20, wherein the light source module 10 includes a plurality of third light source modules 10c, the plurality of third light source modules 10c are concentrically arranged around, the third light source modules 10c are configured to emit illumination light, and the brightness of the plurality of illumination light projected by the plurality of third light source modules 10c to the light modulation component 20 gradually increases along a direction from the center to the periphery of the light source module 10; the light modulation section 20 is configured to convert the received plurality of illumination lights emitted from the plurality of third light source modules 10c into imaging lights.

The structure of the light engine 1 provided in embodiment 4 of the present application is substantially the same as the structure of the light engine 1 provided in embodiment 1, and the difference is that the light source module 10 in the light engine 1 provided in embodiment 1 of the present application is divided into the first light source module 10a and the second light source module 10b, the light source module 10 in the light engine 1 provided in embodiment 4 of the present application is divided into the plurality of third light source modules 10c, and the brightness of the plurality of illumination lights projected onto the light modulation component 20 by the plurality of third light source modules 10c gradually increases along the direction from the center to the periphery of the light source module 10, in this way, the brightness of the plurality of illumination lights projected onto the light modulation component 20 along the direction from the center to the periphery of the light source module 10 can be gradually transited and increased, thereby avoiding the situation of abrupt brightness changes, and being beneficial to improving the uniformity of the projected image.

Specifically, the light source module 10 has a plurality of regions, for example, a central region 12, a first transition region 16, an nth transition region 18 (N is greater than or equal to 1, the present application is described by n=2 as an example), and a peripheral region 14, and the like, and the plurality of regions are concentrically arranged around each other, wherein "concentrically surround" means that the centers of the plurality of regions overlap, and the outer region surrounds the inner adjacent region and the adjacent regions do not overlap. The shape of the plurality of regions is not limited, for example, in some embodiments, the central region 12 is a circular region, the first transition region 16 is an annular region surrounding the central region 12 and in proximate contact with the central region 12, the second transition region 18 is an annular region surrounding the first transition region 16 and in proximate contact with the first transition region 16, and the peripheral region is an annular region surrounding the second transition region 18 and in proximate contact with the second transition region 18; alternatively, in other embodiments, the central region 12 is a rectangular region, the first transition region 16 is a torroidal region (or hollow rectangle) surrounding the central region 12 and in proximate contact with the central region 12, the second transition region 18 is a torroidal region (or hollow rectangle) surrounding the first transition region 16 and in proximate contact with the first transition region 16, and the peripheral region is a torroidal region (or hollow rectangle) surrounding the second transition region 18 and in proximate contact with the second transition region 18. The plurality of third light source modules 10c are disposed in the plurality of regions, respectively, and are disposed in one-to-one correspondence, and thus, the plurality of third light source modules 10c are disposed concentrically around each other.

In order to realize that the brightness of the plurality of illumination lights projected to the light modulation part 20 by the plurality of third light source modules 10c gradually increases in the direction from the center to the outer circumference of the light source module 10, the etendue and/or the current and/or the photoelectric conversion efficiency realization of the plurality of third light source modules 10c may be adjusted.

Optionally, in some embodiments, each third light source assembly 10c comprises at least one light emitting assembly 11c and at least one lens assembly 15c, the lens assembly 15c being configured to collect and/or collimate illumination light emitted by the light emitting assembly 11 c. In some embodiments, the lens assembly 15c includes a plurality of collimating lenses 151c, the plurality of collimating lenses 151c are disposed in one-to-one correspondence with the plurality of light emitting assemblies 11c, the collimating lenses 151c are configured to collimate the illumination light emitted from the corresponding light emitting assemblies 11c, and the plurality of focal lengths of the plurality of collimating lenses 151c gradually increase along a direction from the center to the periphery of the light source module 10. Alternatively, in other embodiments, the lens assembly 15c includes a plurality of collecting lenses 150c, the collecting lenses 150c are disposed in one-to-one correspondence with the plurality of light emitting assemblies 11c, the collecting lenses 150c are configured to collect the illumination light emitted from the corresponding light emitting assemblies 11c, and the plurality of focal lengths of the plurality of collecting lenses 150c gradually increase along the direction from the center to the periphery of the light source module 10. Alternatively, in other embodiments, the areas of the light emitting surfaces of the light emitting assemblies 11c gradually decrease in a direction from the center to the outer circumference of the light source module 10. By the above manner, the optical expansion amounts of the third light source assemblies 10c projected to the light modulation component 20 can be gradually increased along the direction from the center of the light source module 10 to the periphery, so that the brightness of the illumination light of the third light source assemblies 10c projected to the light modulation component 20 is gradually increased along the direction from the center of the light source module 10 to the periphery, the condition of abrupt brightness change is avoided, and the uniformity of the projection picture is improved.

Optionally, in other embodiments, the optical engine 1 may include a plurality of driving circuits 30, where the plurality of driving circuits 30 are electrically connected to the plurality of light emitting components 11c in a one-to-one correspondence manner, and each driving circuit 30 is configured to provide a current to the corresponding light emitting component 11c, and the plurality of currents gradually increase along a direction from the center to the periphery of the light source module 10, so that the brightness of the plurality of illumination lights projected onto the light modulating component 20 by the plurality of third light source modules 10c can gradually increase in a transition manner along a direction from the center to the periphery of the light source module 10, thereby avoiding a situation of abrupt brightness changes and being beneficial to improving the uniformity of the projected image.

Alternatively, in other embodiments, the photoelectric conversion efficiency of the light emitting assemblies 11c increases gradually along the direction from the center to the periphery of the light source module 10, so that the light emitting assemblies 11c with different photoelectric conversion efficiencies can be arranged according to different areas, and the brightness of the illumination light projected to the light modulating component 20 by the third light source assemblies 10c increases gradually along the direction from the center to the periphery of the light source module 10, which is beneficial to improving the uniformity of the projected image.

It will be appreciated that the above-described embodiments of the present application provide projection system 100 that may also include other optical elements known in the art, such as collection lenses, mirrors, etc., and may be specifically designed as desired, as the present application is not limited in this regard.

It is to be understood that the methods and means for improving uniformity in the above embodiments may be used in combination, and the above embodiments are not limited to a single method for improving uniformity, for example, the focal length of the lens may be differently set when the driving current of the first light emitting element is different from the driving current of the second light emitting element, and other combinations and variations of the embodiments are also within the scope of the present application.

The projection system is not limited to the above-mentioned embodiments, and all the components are not limited to be disposed adjacent to or in direct contact with each other, and in practical application, suitable components, or relative positional relationships, may be selected according to requirements such as product structures, or other structures may be disposed between adjacent components to indirectly contact the adjacent components.

The foregoing is only the embodiments of the present application, and therefore, the patent scope of the application is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present application and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the application.

Claims

1. An optical engine adapted for use in a projection system, comprising:

a light source module configured to emit illumination light, the light source module including a first light source assembly and a second light source assembly disposed around the first light source assembly; and

a light modulation section configured to convert the received illumination light into imaging light;

when the optical machine is in a working state, the brightness of the second illumination light projected to the light modulation component by the second light source component is larger than the brightness of the first illumination light projected to the light modulation component by the first light source component.

2. The light engine of claim 1, wherein the first light source assembly comprises at least one first light emitting assembly configured to emit first illumination light; the second light source assembly includes at least one second light emitting assembly configured to emit second illumination light.

3. The light engine of claim 2, wherein the first light source assembly comprises a first lens assembly configured to collect and/or collimate the first illumination light emitted by the at least one first light emitting assembly; the second light source assembly includes a second lens assembly configured to collect and/or collimate the second illumination light emitted by the at least one second light emitting assembly.

4. A light engine as claimed in claim 2 or 3, characterized in that the light engine comprises:

at least one first driving circuit electrically connected to the at least one first light emitting component in a one-to-one correspondence, each of the at least one first driving circuits configured to provide a first current to the corresponding first light emitting component; and

at least one second driving circuit electrically connected to the at least one second light emitting component in a one-to-one correspondence, each of the at least one second driving circuits configured to provide a second current to the corresponding second light emitting component;

the second current is greater than the first current.

5. A light engine as claimed in claim 2 or 3, characterized in that the light engine comprises:

at least one first driving circuit electrically connected to the plurality of first light emitting components and configured to provide a first current to the plurality of first light emitting components;

at least one second driving circuit electrically connected to the plurality of second light emitting components and configured to provide a second current to the plurality of second light emitting components;

the second current is greater than the first current.

6. A light engine as claimed in claim 2 or 3, characterized in that the light engine comprises:

A first driving circuit electrically connected to all of the first light emitting components and configured to supply a first current to all of the first light emitting components;

a second driving circuit electrically connected to all of the second light emitting components and configured to supply a second current to all of the second light emitting components;

the second current is greater than the first current.

7. The light engine of claim 2 or 3, wherein the at least one second light emitting element has a greater photoelectric conversion efficiency than the at least one first light emitting element.

8. The light engine of claim 3, wherein the first lens assembly comprises at least a first collimating lens and the second lens assembly comprises at least a second collimating lens;

the at least one first collimating lens is arranged in one-to-one correspondence with the at least one first light emitting component, and the first collimating lens is configured to collimate the first illumination light emitted by the corresponding first light emitting component; and

the at least one second collimating lens is arranged in one-to-one correspondence with the at least one second light emitting component, and the second collimating lens is configured to collimate the second illumination light emitted by the corresponding second light emitting component;

The first focal length of the first collimating lens is smaller than the second focal length of the second collimating lens.

9. The light engine of claim 3, wherein the first lens assembly comprises at least a first collection lens and the second lens assembly comprises at least a second collection lens;

the at least one first collecting lens is arranged in one-to-one correspondence with the at least one first light emitting component, and the first collecting lens is configured to collect the first illumination light emitted by the corresponding first light emitting component; and

the at least one second collecting lens is arranged in one-to-one correspondence with the at least one second light emitting component, and the second collecting lens is configured to collect the second illumination light emitted by the corresponding second light emitting component;

the first focal length of the first collection lens is less than the second focal length of the second collection lens.

10. The light engine of claim 2, wherein an area of the light exit surface of the first light emitting element is larger than an area of the light exit surface of the second light emitting element.

11. The light engine of claim 2, wherein the first light emitting component comprises a light emitting diode and the second light emitting component comprises a laser.

12. An optical engine adapted for use in a projection system, comprising:

the light source module comprises a plurality of light source assemblies, the light source assemblies are concentrically arranged in a surrounding mode, and the light source assemblies are configured to emit illumination light; and

a light modulation section configured to convert a plurality of the illumination lights emitted from the plurality of the light source modules received into imaging lights;

wherein the brightness of the illumination light projected to the light modulation member by the light source modules gradually increases along a direction from the center to the outer periphery of the light source module.

13. The light engine of claim 12, wherein each of the light source modules comprises at least one light emitting module and at least one lens module configured to collect and/or collimate the illumination light emitted by the light emitting module.

14. The light engine of claim 13, wherein the light engine comprises:

and a plurality of driving circuits electrically connected to the plurality of light emitting modules in a one-to-one correspondence, each of the driving circuits being configured to supply a current to the corresponding light emitting module, the plurality of currents gradually increasing along a direction from a center to an outer periphery of the light source module.

15. The light engine of claim 13, wherein the lens assembly includes a plurality of collimating lenses disposed in one-to-one correspondence with the plurality of light emitting assemblies, the collimating lenses configured to collimate the illumination light emitted from the corresponding light emitting assemblies, and a plurality of focal lengths of the plurality of collimating lenses gradually increase along a direction from a center to an outer periphery of the light source module.

16. The light engine of claim 13, wherein the lens assembly includes a collection lens, a plurality of the collection lenses being disposed in one-to-one correspondence with a plurality of the light emitting assemblies, the collection lens being configured to collect the illumination light emitted by the corresponding light emitting assemblies, and a plurality of focal lengths of the collection lenses increasing in a direction from a center to an outer periphery of the light source module.

17. The light engine of claim 13, wherein the areas of the light emitting surfaces of the light emitting assemblies decrease gradually along a direction from the center to the periphery of the light source module.

18. A projection system, comprising:

the light engine of any one of claims 1-17; and

A lens configured to project the imaging light to a screen.