CN220983645U - Light source module, image generation device, display device and vehicle - Google Patents

Abstract

The embodiment of the application discloses a light source module, an image generation device, display equipment and a vehicle, relates to the field of optical structures, and aims to solve the problem of low integration level of the light source module. The specific scheme is as follows: the light source module comprises a substrate, a first light source, a second light source and a third light source. The first light source, the second light source and the third light source are arranged side by side along the first direction and are all connected with the same side of the substrate. The light emitting directions of the first light source, the second light source and the third light source are parallel, and the luminous efficiency of the first light source, the luminous efficiency of the second light source and the luminous efficiency of the third light source are gradually decreased one by one. The three light sources share the substrate, so that the integration level of the light source module can be improved. The space occupied by the three light sources arranged side by side is smaller, the size of the light source module is reduced, and the integration level of the light source module is improved. When the light source module is applied to an image generating device, the luminous flux from the light rays of the three light sources to the light homogenizing element is close to ensure that the color of the image is uniform.

Description

Light source module, image generation device, display device and vehicle

Technical Field

The embodiment of the application relates to the field of optical structures, in particular to a light source module, an image generating device, display equipment and a vehicle.

Background

With the development of display technology, display technology is widely used in various fields. For example, a Head Up Display (HUD) is mounted on a vehicle, and an image is projected and displayed into a driver front view.

With consumer demands for miniaturization of displays, how to increase the integration of various components in the display, for example, how to increase the integration of light sources in the display, has also been proposed.

Disclosure of utility model

The embodiment of the application provides a light source module, an image generating device, display equipment and a vehicle, which are used for solving the problem of low integration level of the light source module.

In order to achieve the above purpose, the present application adopts the following technical scheme.

In a first aspect, an embodiment of the present application provides a light source module. The light source module comprises a substrate, a first light source, a second light source and a third light source. The first light source, the second light source and the third light source are arranged side by side along a first direction and are all connected with the same side of the substrate; the light emitting directions of the first light source, the second light source and the third light source are parallel. The first light source, the second light source and the third light source share the substrate, so that the integration level of the light source module can be improved. Three light sources are arranged side by side, and compared with three light sources which are in triangular distribution, the three light sources arranged side by side occupy smaller space, so that the size of the light source module is reduced, and the integration level of the light source module is improved. In addition, the first light source, the second light source and the third light source are connected to the same side of the substrate. In the mounting process, the mounting can be performed on the same side of the substrate, which is beneficial to improving the mounting efficiency.

With reference to the first aspect, in some realizable manners, the luminous efficiencies of the first light source, the second light source and the third light source gradually decrease one by one. Because the first light source, the second light source and the third light source have a certain volume, the luminous points of the first light source, the second light source and the third light source are not coincident, and the optical axes of the rays emitted by the first light source, the second light source and the third light source are not coincident. Because the light emitting directions of the first light source, the second light source and the third light source are parallel, the light axes of the three light sources are parallel when the light rays leave the light source module. And because the first light source, the second light source and the third light source are arranged side by side along the first direction. The optical axes of the outgoing light rays of the three light sources of the light source module are arranged side by side along the first direction. When the light source module is used in the image generating device, the light homogenizing element of the image generating device needs to homogenize the light rays emitted by the first light source, the second light source and the third light source. In order to increase the integration level of the image generating device, the light rays emitted by the first light source, the second light source and the third light source are transmitted to the same area of the same light homogenizing element, namely, the light rays of the three light sources are transmitted to the light homogenizing element, and the optical axes are required to be coaxial. Thus, the light emitted by the three light sources of the light source module needs to be changed from the optical axis parallel to the optical axis coaxial by the optical element (such as the reflecting element). In order to reduce the number of the aforementioned optical elements (e.g., reflective elements) and the occupied volume, the directions of the three optical axes may be changed at a time to be coaxial with the three optical axes, respectively. That is, three parallel optical axes arranged side by side along the first direction are changed to be coaxial from one optical axis to three optical axes by the optical element, and obviously, if the three optical axes coaxial after the change are parallel to the first direction, only one direction needs to be changed. Because the first light source, the second light source and the third light source are arranged side by side in the first direction. The distances from the light rays of the three light sources which are transmitted along the first direction to the light homogenizing element are gradually reduced after being changed. Taking the example that the first light source is far away from the light homogenizing element relative to the second light source, the optical path length from the light emitted by the first light source to the light homogenizing element is larger than the optical path length from the light emitted by the second light source to the light homogenizing element and is larger than the optical path length from the light emitted by the third light source to the light homogenizing element. When the luminous efficiencies are equal, the larger the optical path length is, the smaller the luminous flux of the light ray is. And because the luminous efficiency of the first light source, the second light source and the third light source is gradually decreased one by one. The larger the optical path is, the larger the light efficiency is, and the smaller the difference of luminous fluxes is when the light emitted by the first light source, the second light source and the third light source propagates to the light homogenizing element, so that the color of the image light emitted by the image generating device is uniform. Therefore, the first light source, the second light source and the third light source with gradually decreasing luminous efficiency are arranged side by side, so that the integration level of the image generating device is high, and the color is uniform.

With reference to the first aspect, in some realizable manners, the light source module further includes: and a controller. The first light source, the second light source and the third light source are all in signal connection with the controller; the controller is used for controlling the electric signals input into the first light source, the second light source and the third light source to gradually decrease one by one. Thus, the controller gradually decreases the luminous efficiency of the first, second and third light sources by controlling the magnitude of the input electrical signal. The difference of luminous fluxes when the light emitted by the first light source, the second light source and the third light source is transmitted to the light homogenizing element is smaller, so that the color of the image light emitted by the image generating device is uniform.

With reference to the first aspect, in some realizable modes, the controller is configured to control the current input to the first light source, the second light source, and the third light source to decrease one by one. Or the controller is used for controlling the voltages input to the first light source, the second light source and the third light source to gradually decrease. The decreasing current or decreasing voltage may decrease the luminous efficiency of the first light source, the second light source and the third light source one by one. The difference of luminous fluxes when the light emitted by the first light source, the second light source and the third light source is transmitted to the light homogenizing element is smaller, so that the color of the image light emitted by the image generating device is uniform.

With reference to the first aspect, in some realizable manners, the light source module further includes: a first identification portion and a second identification portion. The first identification part and the second identification part are arranged on the substrate at intervals; the vertical projection of the first identification part on the surface of the substrate is not overlapped with the first light source, the second light source and the third light source; the vertical projection of the second identification part on the surface of the substrate is not overlapped with the first light source, the second light source and the third light source. The first and second identification parts are not covered by the connection areas of the three light sources and the substrate, so that the first and second identification parts are prevented from being covered by the three light sources and the positions of the three light sources and the rotation angle of the light emitting surface cannot be marked. And because the first identification part and the second identification part are arranged at intervals, an auxiliary line connecting the first identification part and the second identification part can mark the position of the light source and the rotation angle of the light emitting surface. The position of the light source and the rotation angle of the light emitting surface are marked, so that the coordinate position of the light source and the rotation angle of the light emitting surface are more accurate.

With reference to the first aspect, in some realizable modes, the substrate includes a first bottom plate and a first insulating layer that are stacked, the first insulating layer faces the first light source, and the first light source, the second light source and the third light source all penetrate through the first insulating layer and are connected with the first bottom plate. The first identification part comprises a first through hole, and the second identification part comprises a second through hole; the first through hole and the second through hole are arranged on the first insulating layer. The first insulating layer may prevent shorting of conductive structures (e.g., metal lines) and other electrical devices on the first substrate. In the process of forming the first insulating layer, an insulating film may be formed first, and the first insulating layer may be formed by etching insulation. In the process of forming the first insulating layer, the first through hole and the second through hole can be etched to form the first identification part and the second identification part, and the first identification part and the second identification part can be formed without an additional process, so that the process cost is saved.

With reference to the first aspect, in some realizable forms, the first light source includes a light emitting device and a lens assembly; the light emitting device is connected with the substrate, and the lens component is connected with one end of the light emitting device, which is away from the substrate. Thus, the lens component can shape the light rays emitted by the light emitting device to obtain the target light beam.

With reference to the first aspect, in some realizable modes, the substrate is provided with a light reflecting area; the light reflecting area is positioned on one side of the substrate facing the lens component; the vertical projection of the light emitting device on the surface of the substrate and the light reflecting area are not overlapped, and the vertical projection of the lens component on the surface of the substrate and the light reflecting area are at least partially overlapped. Because the vertical projection of the light emitting device on the surface of the substrate and the reflection area are not overlapped, when the distance between the lens component and the surface of the substrate is measured by adopting laser, the laser can avoid the light emitting device when the laser vertically enters the reflection area, and the light emitting device is prevented from shielding the laser. Because the vertical projection of the lens assembly on the surface of the substrate and the light reflecting area at least partially overlap, the laser light can propagate through the lens assembly to the light reflecting area and then measure the distance between the lens assembly and the substrate after being emitted. The arrangement of the light reflection area can assist in determining the distance between the lens assembly and the surface of the substrate, so that the installation accuracy of the lens assembly is improved, and the optical performance of the light source module is improved.

With reference to the first aspect, in some realizable modes, the substrate includes a second base plate and a second insulating layer, wherein the second insulating layer is located between the lens assembly and the second base plate; the light emitting device penetrates through the second insulating layer and is connected with the second bottom plate, the second insulating layer is provided with a mounting hole penetrating through the second insulating layer, and the light reflecting area is located in the mounting hole. In the process of forming the second insulating layer, an insulating film may be formed first, and the insulating film may be etched to form the second insulating layer. The mounting holes can be formed together in the etching process, and no additional process is required.

With reference to the first aspect, in some realizable manners, the light source module further includes: and (3) a bracket. The support is connected with one side of the substrate facing the first light source, and the support is provided with a first light hole, a second light hole and a third light hole. The first light source is located in the first light hole, the second light source is located in the second light hole, and the third light source is located in the third light hole. The first light source, the second light source and the third light source are connected with the same support, so that the integration level of the light source module can be increased. In addition, after the bracket is connected with one of the light sources (such as the first light source), the relative positions of the other two light sources and the bracket are fixed, so that the assembly and adjustment procedure is saved, and the assembly and adjustment cost is reduced.

With reference to the first aspect, in some realizable manners, the light source module further includes a mounting plate. The base plate and the assembly plate are mutually perpendicular, and the light emergent direction of the first light source is deviated from the assembly plate. When the light source module is connected with the shell and other structures, the light source module can be connected with the shell and other structures through the assembly plate. The heat of the first light source, the second light source and the third light source is transferred to the assembly plate through the base plate and then transferred to the shell and other structures.

With reference to the first aspect, in some possible implementations, the base plate and the mounting plate are connected as an integral piece. Therefore, the heat of the substrate can be better conducted to the assembly plate, and the heat dissipation performance of the light source module is improved.

With reference to the first aspect, in some realizable forms, the first light source includes a green light emitting member; the second light source comprises a blue light emitting piece; the third light sources all comprise red light emitting pieces; the green light-emitting piece, the blue light-emitting piece and the red light-emitting piece are all connected with the same side of the substrate. The white light can be obtained after the light rays emitted by the first light source, the second light source and the third light source are modulated.

In a second aspect, an embodiment of the present application provides an image generating apparatus. The image generation device includes: the light source module of any one of the first aspect is configured to uniformly light the light rays emitted by the first light source, the second light source and the third light source. The optical paths of the light rays emitted by the first light source, the second light source and the third light source, which are transmitted to the light homogenizing element, gradually increase one by one. Because the integration level of the light source module is high, the integration level of the image generating device is correspondingly high, and the occupied volume of the image generating device is small.

With reference to the second aspect, in some realizable modes, the image generating apparatus further includes: a first reflective element, a second reflective element, and a third reflective element disposed side-by-side along the first direction. The first reflecting element is used for reflecting the light rays emitted by the first light source and then sequentially transmitting the second reflecting element and the third reflecting element to project the light rays to the light homogenizing element. The second reflecting element is used for reflecting the light rays emitted by the second light source and projecting the light rays to the light homogenizing element through the third reflecting element. The third reflecting element is used for reflecting the light rays emitted by the third light source to the light homogenizing element. Therefore, the first reflecting element, the second reflecting element and the third reflecting element can change the directions of the light beams of the three light sources, so that the directions of the light beams of the three light sources penetrate through the same light homogenizing element. The integration level of the image generating apparatus is increased.

In a third aspect, an embodiment of the present application provides a display apparatus. The display device includes: a processor and any one of the image generating apparatuses provided in the second aspect; the processor is configured to send image data to the image generation device. Because the integration level of the image generating device is higher, the integration level of the display device is also higher, and the image generating device has the advantage of small volume.

In a fourth aspect, an embodiment of the present application provides a vehicle. The vehicle comprises: a reflective element for reflecting a light beam emitted from the display device, and any one of the display devices provided in the third aspect. Because the display device is small, the display device occupies smaller space of the vehicle, and the use experience of a user is increased.

Drawings

Fig. 1a is a schematic structural diagram of a vehicle.

FIG. 1b is a schematic diagram of an AR-HUD optical path structure.

Fig. 2 is a schematic diagram of an internal structure of an image generating apparatus according to an embodiment of the present application.

Fig. 3 is a schematic structural view of a related art light source and a light homogenizing plate.

Fig. 4 is an exploded view of a light source module according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a light source module according to an embodiment of the application.

Fig. 6 is a schematic structural diagram of a substrate and a lens assembly according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of still another image generating apparatus according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of still another image generating apparatus according to an embodiment of the present application.

In the figure: 10-a display device; 20-vehicle; a 21-reflecting element; 11-image generating means; 100-a light source module; 12-a processor; 13-a light homogenizing element; a 14-light modulator; 110-a first light source; 120-a second light source; 130-a third light source; 101-a first light beam; 102-a second light beam; 103-a third light beam; 01-a light source; 02-a light homogenizing plate; 001-a first light emitting group; 002-a second light emitting group; 003-a third light emitting group; 004-a base; 104-a first reflective element; 105-a second reflective element; 106-a third reflective element; 140-a substrate; 141-a first bottom plate; 142-a second floor; 144-fitting a plate; 150-a bracket; 151-first light holes; 152-a second light hole; 153-third light holes; 161-a first identification portion; 162-a second identifier; 171-a first insulating layer; 172-a first through hole; 173-a second through hole; 174-a second insulating layer; 175-mounting holes; a 111-light emitting device; 112-a lens assembly; 1121—a first collimating mirror; 1122-a second collimating mirror; 180-light reflecting region; 201-controller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings.

Hereinafter, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

Furthermore, in the present application, directional terms "upper", "lower", etc. are defined with respect to the orientation in which the components are schematically disposed in the drawings, and it should be understood that these directional terms are relative concepts, which are used for description and clarity with respect thereto, and which may be changed accordingly in accordance with the change in the orientation in which the components are disposed in the drawings.

Embodiments of the present application provide a vehicle including, but not limited to, a vehicle, a ship, an aircraft, etc., and the vehicle will be described below as an example. Wherein, the vehicle can be a car, a passenger car, a truck or a toy car, etc. A vehicle is depicted as an example in fig. 1 a.

Fig. 1a is a schematic illustration of a vehicle 20. As shown in fig. 1a, the vehicle 20 comprises a reflective element 21 and a display device 10. The display device 10 is arranged to emit a light beam and the reflective element 21 is arranged to reflect the light beam emitted by the display device 10.

The present embodiment does not limit the location of the display device 10 on the vehicle 20. In some embodiments, the display device 10 is integrated in a Head Up Display (HUD) that forms a virtual image outside the vehicle after an image projected by the head up display is reflected by the reflective element 21. The head-up display can project state information of the vehicle, indication information of external objects, navigation information and the like in a front visual field range of a driver, and the driver is prevented from looking at the information in a low head mode, so that driving safety is affected. The aforementioned status information includes, for example, information of travel speed, travel mileage, fuel amount, water temperature, and status of lamps. The indication information of the external object comprises a safety distance, surrounding barriers, a reversing image and the like. The navigation information includes a directional arrow, a distance, a travel time, and the like.

Illustratively, the reflective element 21 may be a windshield. The windshield has reflective properties and is capable of reflecting image light emitted by the display device 10 to the human eye.

Types of heads-up displays include, but are not limited to, a combined head-up display system (combiner-HUD, C-HUD), a windscreen head-up display (windshield-HUD, W-HUD), and an augmented reality head-up display system (augmented reality HUD, AR-HUD), among others. Embodiments of the present application are illustrated with the display device 10 integrated in an AR-HUD as an example.

FIG. 1b is a schematic diagram of an AR-HUD optical path structure. Referring to fig. 1b, a display apparatus 10 includes an image generating device (picture generation unit, PGU) 11 and a processor 12. The image generating means 11 is in signal connection with a processor 12, the processor 12 being arranged to send image data to the image generating means 11. By way of example, the display device 10 may include one or more processors 12, the processors 12 being, for example, graphics processors (graphic processing unit, GPUs).

Fig. 2 is a schematic diagram of an internal structure of the image generating apparatus 11 according to the embodiment of the present application. Referring to fig. 2, the image generating apparatus 11 includes a light source module 100 and a light homogenizing element 13. The light outputted from the light source module 100 propagates to the light equalizing element 13, is homogenized, and is modulated after being homogenized. For example, the image generating apparatus 11 further includes a light modulator 14, and the light modulator 14 is configured to modulate light emitted from the light uniformizing element 13. The light modulator 14 is in signal connection with the processor 12 (shown in fig. 1 b), and the light modulator 14 receives image data from the processor 12 (shown in fig. 1 b) and modulates the light beam output from the light source module 100 according to the image data to generate imaging light including image information. The imaging light propagates to the reflective element 21 and is reflected by the reflective element 21 (as shown in fig. 1 b) to enter the human eye.

The light source module 100 includes a first light source 110, a second light source 120, and a third light source 130. The first light source 110 emits a first light beam 101, the second light source 120 emits a second light beam 102, and the third light source 130 emits a third light beam 103. The light homogenizing element 13 needs to homogenize the first light beam 101, the second light beam 102, and the third light beam 103.

Fig. 3 is a schematic diagram of the structures of a related art light source 01 and a light homogenizing plate 02. Referring to fig. 3, a light source 01 includes a first light emitting group 001, a second light emitting group 002, a third light emitting group 003 and a base 004. The first light emitting group 001, the second light emitting group 002 and the third light emitting group 003 are all connected to the base 004. The light equalizing plate 02 is positioned on the light emitting side of the first light emitting group 001, the second light emitting group 002 and the third light emitting group 003.

In fig. 3, the luminous fluxes are equal when the light emitted from the first, second, and third light emitting groups 001, 002, 003 is transmitted to the light equalizing plate 02. The light emitting direction of the first light emitting group 001 faces left, the light emitting direction of the second light emitting group 002 faces right, and the light emitting direction of the third light emitting group 003 faces down. The optical path design makes the optical path n1 from the first light-emitting group 001 to the light-equalizing plate 02, the optical path n2 from the second light-emitting group 002 to the light-equalizing plate 02, and the optical path n3 from the third light-emitting group 003 to the light-equalizing plate 02 equal.

As can be seen from fig. 3, the first light emitting group 001, the second light emitting group 002, and the third light emitting group 003 are mounted in different orientations, and the respective alignment orientations are required, resulting in a reduction in mounting accuracy. In addition, each light emitting group includes a copper plate, a frame, an LED (LIGHT EMITTING diode) light source, a collimator lens, and the like. And because the installation azimuth of the three light-emitting groups is different, each light-emitting group needs to be provided with a copper plate, a mirror bracket and other structures respectively, so that the integration level is low. Obviously, the image generating apparatus including the light source 01 and the light equalizing plate 02 shown in fig. 3 is large in size and low in integration.

The light source module 100 provided by the embodiment of the application has the advantage of high integration level. The image generating apparatus 11 including the light source module 100 also has an advantage of high integration.

As shown in fig. 2, the first, second and third light sources 110, 120 and 130 are disposed side by side along the first direction. For convenience of description, the first direction is defined as the x-direction. The light source module 100 further includes a substrate 140, and the first light source 110, the second light source 120, and the third light source 130 are all connected to the same side of the substrate 140. The light emitting directions of the first, second and third light sources 110, 120 and 130 are the same.

The first, second and third light sources 110, 120 and 130 are connected to the same side of the substrate 140, and the three light sources share the substrate 140, so that the integration of the light source module 100 can be improved. In addition, the three light sources are arranged side by side, and compared with the three light sources in triangular distribution, the three light sources arranged side by side occupy smaller space, which is beneficial to reducing the volume of the light source module 100. In addition, since the first, second and third light sources 110, 120 and 130 are positioned at the same side of the substrate 140, the three light sources have a small degree of freedom in assembling the first, second and third light sources 110, 120 and 130, which is advantageous in improving the mounting accuracy.

In fig. 2, since the first, second and third light sources 110, 120 and 130 have a certain volume, a certain distance (e.g., distance d in fig. 2) is provided between the light emitting point of the first light source 110 and the light emitting point of the second light source 120. Similarly, a distance is provided between the light emitting point of the second light source 120 and the light emitting point of the third light source 130. The light emitting point of the first light source 110, the light emitting point of the second light source 120, and the light emitting point of the third light source 130 do not overlap.

In some embodiments, to further increase the integration level of the image generating apparatus 11, the first light beam 101, the second light beam 102, and the third light beam 103 share the same light homogenizing element 13, and the first light beam 101, the second light beam 102, and the third light beam 103 transmit the same region of the light homogenizing element 13 in the same direction. In other words, when the first light beam 101, the second light beam 102, and the third light beam 103 propagate to the light uniformizing element 13, the optical axes of the first light beam 101, the second light beam 102, and the third light beam 103 are coaxial.

In order to make the color of the image light emitted from the image generating device 11 uniform, the light fluxes of the first light flux 101, the second light flux 102, and the third light flux 103 are equal when the image light propagates to the light uniformizing element 13. Wherein the luminous flux is related to the distance traveled by the light, i.e. the optical path.

In some embodiments of the present application, the luminous efficiencies of the first, second and third light sources 110, 120 and 130 decrease one by one. In other words, the light emitting efficiency of the first light source 110 is greater than the light emitting efficiency of the second light source 120, and the light emitting efficiency of the second light source 120 is greater than the light emitting efficiency of the third light source 130.

As described above, in order to increase the integration level of the image generating apparatus 11, the optical axes of the first light beam 101, the second light beam 102, and the third light beam 103 are coaxial when the first light beam 101, the second light beam 102, and the third light beam 103 propagate to the light uniformizing element 13.

In fig. 2, the first light source 110 is further away from the light homogenizing element 13 than the second light source 120. The first light source 110, the second light source 120, and the third light source 130 are disposed side by side along the x-direction, and the light emitting directions are toward the same side of the substrate 140, and then, the optical axes at the light emitting openings of the first light source 110, the second light source 120, and the third light source 130 are spaced apart along the x-direction, so that when propagating to the light homogenizing element 13, the optical axes of the three light sources are coaxial, and it is necessary to change the three optical axes spaced apart along the x-direction to overlap. In order to reduce the number of optical elements and the occupied volume in the optical axis changing process, the trend of the three optical axes is changed once respectively, if the three optical axes are all perpendicular to the x direction after the change, the trend of the three optical axes can be changed once respectively, and the three optical axes are coaxial after the change.

Taking the direction in fig. 2 as an example, the directions of the first light beam 101, the second light beam 102 and the third light beam 103 emitted by the light source module 100 are all toward the left, after one change, the first light beam 101, the second light beam 102 and the third light beam 103 all propagate downward through the light homogenizing element 13, and the installation positions of elements (such as reflecting elements) for changing the three propagation directions can be adjusted to make the first light beam 101, the second light beam 102 and the third light beam 103 coaxial in the downward propagation process.

It is understood that the first beam 101, the second beam 102, and the third beam 103 are coaxial and are not limited to the optical axes of the three beams being required to be collinear, and the distance between the optical axes of the three beams and the included angle between the optical axes of the three beams may be within the range of working errors, for example, the distance between the optical axes of the three beams is 0 μm to 10 μm, and the included angle between the optical axes is 0 ° to 10 °.

In fig. 2, the directions of the first light beam 101, the second light beam 102 and the third light beam 103 incident on the light homogenizing element 13 are all x-directions, and because the arrangement directions of the first light source 110, the second light source 120 and the third light source 130 are all x-directions, the first light source 110, the second light source 120 and the third light source 130 are all connected with the substrate 140. The optical path of the first light beam 101 propagating from the light emitting position of the first light source 110 to the light homogenizing element 13 is larger than the optical path of the second light beam 102 propagating from the light emitting position of the second light source 120 to the light homogenizing element 13, and is further larger than the optical path of the third light beam 103 propagating from the light emitting position of the third light source 130 to the light homogenizing element 13. And because the luminous efficiencies of the first, second and third light sources 110, 120 and 130 decrease one by one. In other words, when propagating to the light equalizing element 13, the optical path length with high efficiency is large, and the optical path length with low efficiency is small. The difference in luminous fluxes when the first light beam 101, the second light beam 102, and the third light beam 103 are propagated to the light uniformizing element 13 is made small, and the color of the image light emitted from the image generating device 11 is made uniform.

The luminous efficiency of the first light source 110, the second light source 120 and the third light source 130 decreases one by one, which can be achieved by the structure of the light sources, or by controlling the current or voltage input to the light sources, or by adopting the two means.

In some embodiments of the present application, the light source module 100 further includes a controller 201. The first light source 110, the second light source 120 and the third light source 130 are all in signal connection with the controller 201. The controller 201 is configured to control the electric signals input to the first light source 110, the second light source 120, and the third light source 130 to be gradually decreased one by one. The aforementioned electrical signal may be a current or a voltage. In other words, the controller 201 controls the current input to the first light source 110 to be greater than the current input to the second light source 120, and to be greater than the current input to the third light source 130. Since the luminous efficiency and the current are positively correlated, the greater the input current, the greater the luminous efficiency. Or the controller 201 controls the voltage input to the first light source 110 to be greater than the voltage input to the second light source 120 to be greater than the voltage input to the third light source 130. Since the luminous efficiency and the voltage are positively correlated, the greater the input voltage, the greater the luminous efficiency. In this manner, the controller 201 decreases the light emitting efficiency of the first, second and third light sources 110, 120 and 130 one by controlling the magnitude of the input electrical signal. Further, the difference in luminous fluxes when the first light beam 101, the second light beam 102, and the third light beam 103 are propagated to the light uniformizing element 13 is made small, and the color of the image light emitted from the image generating device 11 is made uniform.

It is understood that in other embodiments of the present application, the luminous efficiencies of the first, second and third light sources 110, 120 and 130 are not limited to being gradually decreased, for example, the luminous efficiencies of the first, second and third light sources 110, 120 and 130 may be equal. If the light fluxes of the light rays of the first light source 110, the second light source 120 and the third light source 130 transmitted to the light homogenizing element 13 have a large difference, the light rays emitted from the three light sources can be modulated by a liquid crystal on silicon (liquid crystal on silicon, LCOS) chip, so that the color of the image light emitted from the image generating device 11 is uniform. Alternatively, the light emitted from the three light sources may be modulated by an optical element such as an antireflection film, so that the color of the image light emitted from the image generating device 11 is uniform.

The substrate 140 is not limited by the embodiment of the present application. Illustratively, the substrate 140 may be a printed circuit board (printed circuit board printed circuit boards, PCB). The material of the substrate 140 may include copper, for example. Copper has excellent heat conduction performance, and can radiate heat for the first light source 110, the second light source 120 and the third light source 130, so that the heat radiation performance of the light source module 100 is improved.

The color of the light beams emitted from the first light source 110, the second light source 120, and the third light source 130 is not limited in the embodiments of the present application. Illustratively, the first light source 110 emits green, red, or blue light, the second light source 120 emits green, red, or blue light, and the third light source 130 emits green, red, or blue light. Illustratively, the first light source 110 emits green light, the second light source 120 emits blue light, and the third light source 130 emits red light.

For example, the first light source 110 includes a green light emitting member, the second light source 120 includes a blue light emitting member, and the third light source 130 includes a red light emitting member, all of which are connected to the same side of the substrate 140. It is understood that in other embodiments, the colors of the light beams emitted by the first light source 110, the second light source 120, and the third light source 130 may be other colors. Or may be an invisible light beam, to which embodiments of the present application are not limited.

Fig. 4 is an exploded view of the light source module 100 according to the embodiment of the application. Referring to fig. 4, in some embodiments, the light source module 100 further includes a bracket 150, where the bracket 150 is connected to a side of the substrate 140 facing the first light source 110. The bracket 150 is provided with a first light hole 151, a second light hole 152 and a third light hole 153; the first light source 110 is located in the first light hole 151, the second light source 120 is located in the second light hole 152, and the third light source 130 is located in the third light hole 153. Thus, the light source emitted from the first light source 110 may be emitted from the first light hole 151, the light source emitted from the second light source 120 may be emitted from the second light hole 152, and the light source emitted from the third light source 130 may be emitted from the third light hole 153. The first, second and third light sources 110, 120 and 130 are connected to the same bracket 150, which can increase the integration of the light source module 100. In addition, when the bracket 150 is connected with one of the light sources (for example, the first light source 110), the relative positions of the other two light sources and the bracket are fixed, so that the adjustment procedure is saved, and the adjustment cost is reduced.

The connection manner of the support 150 and the substrate 140 is not limited in the embodiment of the present application. Illustratively, the carrier 150 and the substrate 140 are connected by a glue line. Or the bracket 150 and the base plate 140 are screwed or welded, etc. The material of the support 150 is not limited in the embodiment of the present application, and may be, for example, high temperature resistant plastic.

As described above, the first light source 110, the second light source 120, and the third light source 130 are disposed at intervals along the x-direction. In the embodiment of the present application, the distances between the first light source 110, the second light source 120, and the third light source 130 along the x-direction are not limited. Can be designed according to actual requirements.

Returning to fig. 2, as described above, the optical axis of the first light beam 101 when exiting from the first light source 110 is perpendicular to the x-direction. In fig. 2, the optical axis of the first light beam 101 when emitted from the first light source 110 is directed to the left. Similarly, the optical axes of the second light beam 102 and the third light beam 103 are also directed to the left when they are emitted. When the first light beam 101, the second light beam 102, and the third light beam 103 propagate to the light uniformizing element 13, the optical axes of the first light beam 101, the second light beam 102, and the third light beam 103 are coaxial. Then the propagation direction of the first light beam 101, the second light beam 102 and the third light beam 103 all need to be changed during the propagation to the light homogenizing element 13.

In fig. 2, the image generating apparatus 11 further includes a first reflecting element 104, a second reflecting element 105, and a third reflecting element 106. The first reflecting element 104, the second reflecting element 105 and the third reflecting element 106 are disposed at intervals along the x-direction. The first reflecting element 104 is configured to reflect the light emitted from the first light source 110, and then sequentially transmit the light to the light homogenizing element 13 through the second reflecting element 105 and the third reflecting element 106. The second reflecting element 105 is configured to reflect the light emitted from the second light source 120, and then transmit the light to the light homogenizing element 13 through the third reflecting element 106. The third reflecting element 106 is configured to reflect the light emitted by the third light source 130 to the light homogenizing element 13. Thus, the first light beam 101, the second light beam 102 and the third light beam 103 can pass through the same light homogenizing element 13 by the arrangement of the first reflecting element 104, the second reflecting element 105 and the third reflecting element 106.

Further, the first light beam 101, the second light beam 102, and the third light beam 103 may be projected to the same area of the light homogenizing element 13 by providing mounting positions of the first reflecting element 104, the second reflecting element 105, and the third reflecting element 106. In this way, the propagation paths of the first light beam 101, the second light beam 102, and the third light beam 103 can be changed.

As mentioned above, the light emitted from the first light source 110 needs to pass through the second reflecting element 105 and the third reflecting element 106, and in this process, the luminous flux of the light emitted from the first light source 110 is lost. The light emitted from the second light source 120 needs to pass through the third reflective element 106, and in this process, the luminous flux of the light emitted from the second light source 120 is lost. During the propagation, the luminous flux losses of the light rays emitted from the first, second and third light sources 110, 120 and 130 are different. In an embodiment in which the luminous efficiencies of the first, second, and third light sources 110, 120, and 130 decrease one by one. The progressive decrease in luminous efficiency can attenuate the aforementioned loss differences, making the difference in luminous flux of the three light sources projected onto the light homogenizing element 13 smaller. The color uniformity of the image output by the image generating device 11 is facilitated.

In the process of connecting the first, second, and third light sources 110, 120, and 130 and the substrate 140, the position coordinates for mounting the first, second, and third light sources 110, 120, and 130 on the substrate 140 are designed position coordinates. In some embodiments of the present application, the light source module 100 further includes a first identification portion 161 and a second identification portion 162. The first and second identification parts 161 and 162 serve to mark positions of the first, second and third light sources 110, 120 and 130 and rotation angles of the light emitting surfaces.

The first mark 161 and the second mark 162 are provided on the substrate 140 at a distance. The vertical projection of the first identification portion 161 on the surface of the substrate 140 and the first, second and third light sources 110, 120 and 130 do not overlap. Illustratively, the perpendicular projection of the first identifier 161 on the surface of the substrate 140 and the perpendicular projection of the first light source 110 on the surface of the substrate 140 do not intersect or do not completely coincide. The relationship between the first identification portion 161 and the second light source 120 or the third light source 130 is the same. The vertical projection of the second identifier 162 on the surface of the substrate 140 is not overlapped with the first light source 110, the second light source 120 and the third light source 130.

The first and second identification parts 161 and 162 are not covered by the connection areas of the three light sources and the substrate 140, avoiding that the first and second identification parts 161 and 162 are covered by the three light sources and cannot mark the positions of the three light sources and the rotation angle of the light emitting surface.

Because the first and second identification parts 161 and 162 are disposed at intervals, an auxiliary line connecting the first and second identification parts 161 and 162 may mark the position of the light source and the rotation angle of the light emitting surface. The position of the light source and the rotation angle of the light emitting surface are marked, so that the coordinate position of the light source and the rotation angle of the light emitting surface are more accurate.

The relative positions of the first and second identification parts 161 and 162 and the three light sources are not limited in the embodiment of the present application. The first light source 110 is marked by the first and second marking portions 161 and 162 as an example in connection with fig. 5.

Fig. 5 is a schematic structural diagram of a light source module 100 according to an embodiment of the application. In fig. 5, after the distances from the first identification part 161 to the first light source 110 are a1 and the distances from the second identification part 162 to the first light source 110 are a2, a1 and a2 are determined, the position of the first light source 110 is uniquely determined. The purpose of marking the first light source 110 is achieved.

Illustratively, the angle between any point on the auxiliary line and the line of the light emitting surface of the first light source 110 and the auxiliary line may determine the rotation angle of the light emitting surface of the first light source 110. In fig. 5, an angle between a point on the auxiliary line where the first mark portion 161 is located and a line of the light emitting surface of the first light source 110 and the auxiliary line is taken as an example. It will be appreciated that in the example of a larger area of the light emitting surface, the aforementioned connection may be a connection between the geometric centre of the light emitting surface and any point on the auxiliary line. Or the aforementioned connection line may be a connection line between the midpoint of the edge line of the light emitting surface and any point on the auxiliary line.

In fig. 5, when the position of the first light source 110 is uniquely determined, the angle between the light emitting surface of the first light source 110 and the auxiliary line has a plurality of values, for example, when the mounting posture of the first light source 110 is one posture, the angle between the light emitting surface of the first light source 110 and the auxiliary line is β. When the mounting posture of the first light source 110 is the posture two, the included angle between the light emitting surface of the first light source 110 and the auxiliary line is α. Obviously, the mounting posture of the first light source 110 may be determined by detecting the angle between the light emitting surface of the first light source 110 and the auxiliary line. The shape of the light emitting surface is not limited in the embodiment of the present application, and the light emitting surface may be rectangular, for example.

Similarly, the first identification portion 161 and the second identification portion 162 may mark the position of the first light source 110 and the rotation angle of the light emitting surface, which will not be described herein.

The embodiment of the present application does not limit the structures of the first and second identification parts 161 and 162. Illustratively, the first identifier 161 is a slot structure that is disposed on the substrate 140; or the first identification part 161 is a protrusion provided on the substrate 140. Or the first identification portion 161 is a coating layer connected to the substrate 140. Further, the shape of the first identification part 161 may be a number, a letter, a chinese character, an irregular shape, or the like. The second identifier 162 is the same and will not be described in detail herein.

Returning to fig. 4, in the example of fig. 4, the substrate 140 includes a first base plate 141 and a first insulating layer 171 stacked and disposed, and the first insulating layer 171 covers a surface of the first base plate 141 facing the first light source 110. The first identification portion 161 includes a first through hole 172 and the second identification portion 162 includes a second through hole 173. The first and second via holes 172 and 173 are provided in the first insulating layer 171. The first insulating layer 171 may prevent a conductive structure (e.g., a metal line) and other electric devices on the first chassis 141 from being shorted. In the process of forming the first insulating layer 171, an insulating film may be formed first, and the first insulating layer 171 may be formed by etching insulation. In the process of forming the first insulating layer 171, the first and second through holes 172 and 173 may be etched to form the first and second identification parts 161 and 162, and the first and second identification parts 161 and 162 may be formed without an additional process, thereby saving process costs.

In an embodiment in which the material of the first base plate 141 includes copper, the first via 172 penetrates the first insulating layer 171 to expose a surface of the first base plate 141. The excellent gloss properties of copper may make the first identification portion 161 easier to identify. In the installation process, the position of the first identification part 161 can be quickly determined, and the second identification part 162 can be quickly identified in the same way, so that the installation efficiency of the light source module 100 is improved.

The material of the first insulating layer 171 is not limited in the embodiment of the present application, and illustratively, the material of the first insulating layer 171 includes a liquid photoresist (also called green oil).

The embodiment of the present application does not limit the structure of the first light source 110. In fig. 4, the first light source 110 includes a light emitting device 111 and a lens assembly 112, the light emitting device 111 is connected to the substrate 140, and the lens assembly 112 is located at a light emitting side of the light emitting device 111. In this way, the lens assembly 112 can shape the light emitted from the light emitting device 111 to obtain the target beam.

The embodiment of the present application does not limit the type of the light emitting device 111. The light emitting device 111 may be an LED, for example.

Embodiments of the present application are not limited in the configuration of lens assembly 112. In some embodiments, the lens assembly 112 includes a first collimating mirror 1121 and a second collimating mirror 1122, the first collimating mirror 1121 and the second collimating mirror 1122 being arranged in a stack in a direction away from the light emitting device 111. The light emitted from the light emitting device 111 is collimated by passing through the first collimating mirror 1121 and the second collimating mirror 1122 in this order.

Similarly, the second light source 120 and the third light source 130 may also include the light emitting device 111 and the lens assembly 112, which are not described herein.

In embodiments where the light source module 100 includes a bracket 150, the lens assembly 112 is coupled to the bracket 150. The lens assembly 112 of the first light source 110 is disposed in the first light hole 151 and connected to the first light hole 151. The lens assemblies 112 of the second light source 120 and the third light source 130 are respectively connected to the second light holes 152 and the third light holes 153. The bracket 150 reduces the freedom of the lens assembly 112 and reduces the adjustment cost. And the three lens assemblies 112 share one bracket 150, so that the number of parts of the light source module 100 can be reduced, and the integration level can be improved.

In some embodiments, it may be desirable to determine the distance between the lens assembly 112 and the light emitting device 111 during installation of the lens assembly 112. Or to determine the distance between the lens assembly 112 and the surface of the substrate 140. Typically, the foregoing distance may be measured by means of a laser test, with laser light being illustratively irradiated on the substrate 140 and then reflected to a laser receiver to obtain the distance between the substrate 140 and the lens assembly 112. Also, because the surface of the substrate 140 has various structures (e.g., wiring, electrical connectors, etc.), the various structures can affect the reflection of the laser light, thereby affecting the measurement results and the mounting location of the lens assembly 112.

Fig. 6 is a schematic structural diagram of the substrate 140 and the lens assembly 112 according to an embodiment of the present application. Referring to fig. 6, in some embodiments, the substrate 140 is provided with a light reflection area 180. The light reflecting region 180 is located on a side of the substrate 140 facing the lens assembly 112, and the vertical projection of the light emitting device 111 on the surface of the substrate 140 and the light reflecting region 180 do not overlap, and the vertical projection of the lens assembly 112 on the surface of the substrate 140 (region c in fig. 6) and the light reflecting region 180 at least partially overlap. Because the vertical projection of the light emitting device 111 on the surface of the substrate 140 and the light reflection area 180 do not overlap, when the laser is vertically incident into the light reflection area 180, the laser can avoid the light emitting device 111, and the light emitting device 111 is prevented from shielding the laser. Because the c region and the light reflection region 180 at least partially overlap, the c region is closer to the light emitting device 111, and the laser light measures the distance h between the light reflection region 180 and the substrate 140 with higher accuracy and more accurate measurement. In this way, the reflective region 180 is beneficial to assist in determining the distance h between the lens assembly 112 and the surface of the substrate 140, improving the mounting accuracy of the lens assembly 112, and improving the optical performance of the light source module 100.

The perpendicular projection of the light emitting device 111 on the surface of the substrate 140 and the light reflection area 180 do not overlap, including: the light emitting devices 111 are spaced apart from the light reflecting regions 180 in a perpendicular projection of the light emitting devices 111 onto the surface of the substrate 140, or the light reflecting regions 180 are partially within the perpendicular projection of the light emitting devices 111 onto the surface of the substrate 140 and partially outside the projection.

Similarly, the aforementioned region c and the retroreflective regions 180 at least partially overlap, including: the c-region and the light reflecting region 180 overlap, or the light reflecting region 180 is partially within the c-region and partially outside the c-region.

In the example of fig. 6, the substrate 140 includes a second base plate 142 and a second insulating layer 174, and an end of the light emitting device 111 remote from the lens assembly 112 penetrates the second insulating layer 174 to be connected to the substrate 140. The second insulating layer 174 is positioned between the lens assembly 112 and the second chassis 142. The second insulating layer 174 is provided with a mounting hole 175 penetrating the second insulating layer 174, and the light reflecting region 180 is located in the mounting hole 175. The second insulating layer 174 has a conductive structure (e.g., metal line) and other electrical devices that can avoid shorting of the substrate 140. The light reflection region 180 is located in the mounting hole 175, and an insulating film may be formed first during a process of forming the second insulating layer 174, and the insulating film may be etched to form the second insulating layer 174. The mounting holes 175 may be formed together during etching to expose the light reflection regions 180, without providing an additional process. In addition, the light reflection region 180 and the substrate 140 do not require an additional mounting process, and both the mounting cost and the adjustment cost are reduced. In embodiments where the material of the second base plate 142 comprises copper, the superior gloss properties of copper may also reflect laser light, facilitating the determination of the distance h between the lens assembly 112 and the surface of the substrate 140.

In other embodiments of the present application, the light reflecting region 180 may not be disposed in the mounting hole 175 of the second insulating layer 174. For example, a light reflecting layer is disposed on a side of the second insulating layer 174 facing away from the second bottom plate 142, and the light reflecting region 180 is disposed on a surface of the light reflecting layer. The light reflecting layer may be, for example, a silver film or a copper film.

The material of the second insulating layer 174 is not limited in the embodiment of the present application, and illustratively, the material of the second insulating layer 174 includes a liquid photoresist (also called green oil).

As mentioned above, in the embodiment in which the substrate 140 includes the first base plate 141, the first base plate 141 and the second base plate 142 may be connected as an integral piece. In embodiments where the substrate 140 includes the second insulating layer 174 and the first insulating layer 171, the first insulating layer 171 and the second insulating layer 174 may be connected as an integral piece.

As mentioned above, in the embodiment where the light source module 100 includes the support 150, the vertical projection of the support 150 on the substrate 140 and the light reflection area 180 do not completely overlap. Thus, the laser incident to the light reflection area 180 can avoid the support 150, and the support 150 is prevented from shielding the laser. Illustratively, the substrate 140 may include three light reflecting regions 180, and the three light reflecting regions 180 are respectively located in the first, second and third light transmitting holes 151, 152 and 153.

Fig. 7 is a schematic structural diagram of still another image generating apparatus 11 according to an embodiment of the present application. Referring to fig. 7, the light source module 100 further includes a mounting plate 144. The base plate 140 and the mounting plate 144 are perpendicular to each other. The first light source 110, the second light source 120 and the third light source 130 are all connected with the substrate 140, and the light emitting direction of the first light source 110 is away from the mounting plate 144. In this way, when the light source module 100 and the housing or the like are connected, the light source module may be connected by the mounting plate 144 and the housing or the like. The heat of the first, second and third light sources 110, 120 and 130 is transferred to the mounting plate 144 through the substrate 140 and then to the housing or the like. In some embodiments, a heat dissipation plate may not be additionally disposed on a side of the substrate 140 facing away from the first light source 110, and in embodiments where the material of the substrate 140 includes copper, the excellent heat conduction property of copper may increase heat dissipation. In addition, heat is transferred to a side away from the light emitting direction of the first light source 110, so that an influence of heat on a member (for example, the light homogenizing element 13 in fig. 2) on the light emitting side of the first light source 110 can be avoided.

In some embodiments of the present application, the base plate 140 and the mounting plate 144 are connected as an integral piece. In this way, heat from the substrate 140 can be better transferred to the mounting plate 144.

When the image generating device 11 and the housing of the display apparatus 10 are connected, the assembly direction of the image generating device 11 and the housing is parallel to the substrate 140. Or the assembly direction of the image generating device 11 and the housing is perpendicular to the substrate 140.

The image generating apparatus 11 further includes a light processing structure such as a light uniformizing element 13 (shown in fig. 2). The light processing structure is located at the light emitting side of the light source module 100. In some embodiments, in the light emitting direction of the light source module 100, the size of the light processing structure is larger, for example, k1 is larger than k2 and k1 is larger than k3 in fig. 6. When the image forming apparatus 11 is mounted, one end of the image forming apparatus 11 having a larger size is mounted with other structures in order to avoid the image forming apparatus 11 forming a cantilever structure having a longer arm length.

For example, when the image generating device 11 and the housing of the display apparatus 10 are connected, the end portion of the image generating device 11 having a size k1×k2 is connected to the housing of the display apparatus 10. The distance from the free end of the image generating device 11 to the housing is made smaller by k3. As described above, the substrate 140 and the mounting plate 144 are perpendicular to each other. The light emitting direction of the first light source 110 is away from the mounting plate 144. When the image generating apparatus 11 and the housing of the display device 10 are connected, the fitting plate 144 and the housing are connected. The heat of the light source module 100 is conducted to the housing through the mounting plate 144, so that the light source module 100 has excellent heat dissipation performance while improving the connection performance of the image generating device 11 and the housing connection.

In an embodiment of the present application, the substrate 140 may be a strip-shaped plate. In an embodiment in which the substrate 140 is a square plate, a side of the substrate 140 facing away from the first light source 110 is connected to the housing of the display device 10, transferring heat from the first light source 110 to the housing of the display device 10.

Fig. 8 is a schematic structural diagram of still another image generating apparatus 11 according to an embodiment of the present application. Referring to fig. 8, the substrate 140 is a square plate, and the substrate 140 is disposed on a larger end surface of the image generating device 11. For example, the substrate 140 is provided on an end surface of the image generating device 11 having a size k4×k5. k4 is greater than k5 and k4 is greater than k6. When the image generating apparatus 11 and the housing of the display device 10 are connected, the side of the substrate 140 away from the first light source 110 is connected with the housing of the display device 10, and the substrate 140 transfers the heat of the first light source 110 to the housing of the display device 10, so that the heat transfer structure is not additionally arranged, and the volume of the image generating apparatus 11 is reduced. In addition, the distance from the free end of the image generating device 11 to the housing is smaller than k6, so that the image generating device 11 is prevented from forming a cantilever structure with a longer arm length, and the stability of the image generating device 11 is improved.

It is to be understood that, in fig. 7, the light emitting direction of the first light source 110 is different from the light emitting direction of the first light source 110 in fig. 8, the installation position of the beam processing structure (e.g. the light homogenizing element 13 in fig. 2, etc.) in fig. 7 and the installation position of the beam processing structure (e.g. the light homogenizing element 13 in fig. 2, etc.) in fig. 8 may be set according to the light path design, and the directions of the light paths of the two may be different, which is not limited by the embodiment of the present application.

The foregoing is merely illustrative of specific embodiments of the present application, and the scope of the present application is not limited thereto, but any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (16)

1. A light source module, characterized in that the light source module comprises:

A substrate;

A first light source;

A second light source; and

The first light source, the second light source and the third light source are arranged side by side along the first direction and are all connected with the same side of the substrate; the light emitting directions of the first light source, the second light source and the third light source are parallel.

2. The light source module of claim 1, wherein the luminous efficiency of the first light source, the second light source, and the third light source decreases one by one.

3. A light source module as recited in claim 1 or claim 2, wherein the light source module further comprises: a controller; the first light source, the second light source and the third light source are all in signal connection with the controller; the controller is used for controlling the electric signals input to the first light source, the second light source and the third light source to gradually decrease one by one.

4. A light source module as recited in claim 1 or claim 2, wherein the light source module further comprises: a first identification portion and a second identification portion; the first identification part and the second identification part are arranged on the substrate at intervals; the vertical projection of the first identification part on the surface of the substrate is not overlapped with the first light source, the second light source and the third light source; the vertical projection of the second identification part on the surface of the substrate is not overlapped with the first light source, the second light source and the third light source.

5. The light source module of claim 4, wherein the substrate comprises a first bottom plate and a first insulating layer stacked, the first insulating layer faces the first light source, and the first light source, the second light source and the third light source all penetrate through the first insulating layer and are connected with the first bottom plate; the first identification part comprises a first through hole, and the second identification part comprises a second through hole; the first via and the second via are disposed in the first insulating layer.

6. A light source module as recited in claim 1 or claim 2, wherein the first light source comprises a light emitting device and a lens assembly; the light emitting device is connected with the substrate, and the lens component is positioned on the light emitting side of the light emitting device.

7. The light source module of claim 6, wherein the substrate is provided with a light reflecting area, and the light reflecting area is positioned on one side of the substrate facing the lens assembly; the vertical projection of the light emitting device on the surface of the substrate and the light reflecting area are not overlapped, and the vertical projection of the lens component on the surface of the substrate and the light reflecting area are at least partially overlapped.

8. The light source module of claim 7, wherein the substrate comprises a second bottom plate and a second insulating layer which are stacked, an end of the light emitting device away from the lens assembly penetrates through the second insulating layer and is connected with the second bottom plate, and the second insulating layer is positioned between the lens assembly and the second bottom plate; the second insulating layer is provided with a mounting hole penetrating through the second insulating layer, and the light reflecting area is located in the mounting hole.

9. A light source module as recited in claim 1 or claim 2, wherein the light source module further comprises: a bracket; the support is connected with one side of the substrate, which faces the first light source, and is provided with a first light hole, a second light hole and a third light hole; the first light source is located in the first light hole, the second light source is located in the second light hole, and the third light source is located in the third light hole.

10. A light source module as recited in claim 1 or claim 2, wherein the light source module further comprises: the base plate is perpendicular to the assembly plate, and the light emitting direction of the first light source is deviated from the assembly plate.

11. The light source module of claim 10, wherein the base plate and the mounting plate are connected as an integral piece.

12. The light source module of claim 1 or 2, wherein the first light source comprises a green light emitting member; the second light source comprises a blue light emitting piece; the third light sources all comprise red light emitting pieces; the green light-emitting piece, the blue light-emitting piece and the red light-emitting piece are all connected with the same side of the substrate.

13. An image generation apparatus, characterized in that the image generation apparatus comprises: the light source module according to any one of claims 1-12, wherein the light homogenizing element is used for homogenizing the light rays emitted by the first light source, the second light source and the third light source; the optical paths of light rays emitted by the first light source, the second light source and the third light source, which are transmitted to the light homogenizing element, gradually increase one by one.

14. The image generation apparatus according to claim 13, wherein the image generation apparatus further comprises: a first reflective element, a second reflective element, and a third reflective element disposed side-by-side along the first direction;

the first reflecting element is used for reflecting the light rays emitted by the first light source and then sequentially transmitting the second reflecting element and the third reflecting element to be projected to the light homogenizing element; the second reflecting element is used for reflecting the light rays emitted by the second light source and then projecting the light rays to the dodging element through the third reflecting element; the third reflecting element is used for reflecting the light rays emitted by the third light source to the dodging element.

15. A display device, the display device comprising: a processor and an image generation apparatus as claimed in claim 13 or 14; the processor is configured to send image data to the image generation device.

16. A vehicle, the vehicle comprising: a reflective element for reflecting a light beam emitted by the display device and the display device of claim 15.