WO2020177593A1

WO2020177593A1 - Brightness detection device, light source system and projection device

Info

Publication number: WO2020177593A1
Application number: PCT/CN2020/076783
Authority: WO
Inventors: 文新柏; 李屹
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2019-03-04
Filing date: 2020-02-26
Publication date: 2020-09-10
Also published as: CN209543035U

Abstract

The utility model provides a projection device comprising a projection display screen and a light source system. The light source system comprises an optical machine housing, a light source, a reflector provided on the optical machine housing, and a brightness detection device. The reflector is used for reflecting light output from the light source. The brightness detection device includes a brightness sensor, which is disposed on a side of the reflector facing away from the incident light and is used for sensing the transmission light intensity of the reflector. The utility model further provides the brightness detection device and the light source system. The brightness detection device, the light source system and the projection device according to the utility model can accurately detect the output light brightness of the light source.

Description

Brightness detection device, light source system and projection equipment

Technical field

The utility model relates to the field of optics and projection technology, in particular to a detachable brightness detection device, a light source system provided with the brightness detection device, and a projection equipment provided with the light source system.

Background technique

Nowadays, projection equipment has been widely used in various conferences and home theaters. However, the light source system of the projection equipment will gradually attenuate as the use time increases during the long-term operation, thereby affecting The brightness of the projected screen. Therefore, it is necessary to detect the output light brightness of the light source and make appropriate adjustments so that the output light brightness of the light source remains stable.

At present, in order to quickly grasp the output brightness of the light source, a brightness sensor is generally used to detect the brightness. In the prior art, the brightness sensor is usually set on the housing of the color wheel assembly, and the actual detection is the stray light on the optical path. The stray light is formed by the diffuse reflection of the surface of some structural parts, which is largely affected. Affected by the surface glossiness of the structural parts, the surface glossiness of the structural parts will gradually decrease during long-term use, which will directly cause the light intensity irradiated on the brightness sensor to weaken, not the brightness of the light source, and the brightness sensor There is an attenuator at the front of the head, which will also weaken the light intensity, causing deviations in the detection value of the brightness sensor, and thus the output light brightness of the light source cannot be accurately detected.

Utility model content

The purpose of the utility model is to provide a brightness detection device, a light source system and a projection device, which can accurately detect the output light brightness of the light source.

In order to solve the above technical problems, on the one hand, a light source system is provided. The light source system includes an opto-mechanical housing and a light source. The light source system further includes a reflector disposed on the opto-mechanical housing. The reflector is used to reflect the light output by the light source; and a brightness detection device arranged on the outside of the optical engine housing, the brightness detection device is located on the side of the reflector away from the incident light, and is used to detect the The output brightness of the light source.

In another aspect, a brightness detection device is provided for detecting the output light brightness of a light source system, the light source system includes an opto-mechanical housing and a reflector, wherein the brightness detecting device is disposed in the opto-mechanical housing Above, the brightness detection device includes a brightness sensor arranged on the side of the reflector away from the incident light, and the brightness sensor is used to sense the intensity of the transmitted light of the reflector.

In yet another aspect, a projection device is provided. The projection device includes a projection display screen and the aforementioned light source system, wherein the brightness of the projection screen on the projection display screen can be adjusted by changing the output light brightness of the light source system .

The brightness detection device, light source system and projection equipment provided by the utility model can accurately detect the output light brightness of the light source by arranging the brightness detection device directly on the output light path without being affected by stray light, and the brightness adjustment device The structure is simple, the assembly is reliable, and it is convenient for later disassembly and maintenance.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present utility model more clearly, the following will briefly introduce the drawings that need to be used in the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative work, other drawings can be obtained from these drawings.

Fig. 1 is a schematic structural diagram of a light source system in an embodiment of the present invention.

Fig. 2 is a partial three-dimensional assembly view of the light source system in Fig. 1.

FIG. 3 is a schematic diagram of the three-dimensional structure of the optical engine housing in FIG. 2.

FIG. 4 is a schematic diagram of the three-dimensional structure of the optical engine housing in FIG. 3 from another viewing angle.

Fig. 5 is a cross-sectional view of the light source system in Fig. 2.

Fig. 6 is a perspective exploded schematic view of the light source system in Fig. 2.

FIG. 7 is a three-dimensional exploded schematic view of the light source system in FIG. 6 from another perspective.

Fig. 8 is a partial three-dimensional assembly view of the light source system in Fig. 6.

Fig. 9 is a partial three-dimensional assembly view of the light source system in Fig. 8 from another perspective.

Fig. 10 is a further perspective assembly view of the light source system in Fig. 8.

FIG. 11 is a schematic diagram of the three-dimensional structure of the housing in FIG. 6.

FIG. 12 is a three-dimensional structural diagram of the housing in FIG. 11 from another perspective.

Fig. 13 is a schematic structural diagram of a projection device in an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "horizontal", "vertical", "inner", "outer" and other directions indicate directions Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and Operation, therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. In the description of the present invention, "several" means two or more than two, unless otherwise specifically defined.

In the description of the present utility model, it should be noted that, unless otherwise clearly defined and defined, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integrally connected; it can be directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present utility model can be understood according to specific circumstances.

Please refer to FIGS. 1 and 2 together. The present invention provides a light source system 100. The light source system 100 includes an opto-mechanical housing 10, a light source 20, a reflector 40, and a brightness detection device 200, wherein the reflector 40 is arranged on the optical machine housing 10 for reflecting the light output by the light source 20, the brightness detection device 200 is detachably mounted on the outside of the optical machine housing 10 and is located on the reflector The side of 40 facing away from the incident light, the brightness detection device 200 is used to detect the brightness of the output light of the light source 20, and can obtain corresponding detection values.

Wherein, the reflector 40 has a certain degree of light transmission, the incident light of the light source 20 is reflected on the reflector 40 and also has a certain degree of transmission. The brightness detection device 200 is used to detect the The light intensity of the transmitted light of the mirror 40.

In some embodiments, the light source system 100 further includes a light source driver 30 which can adjust the output light brightness of the light source 20 according to the detection value of the brightness detection device 200. Specifically, as shown in FIG. 1, the input end of the light source driver 30 is connected to the brightness sensor 70 included in the brightness detection device 200, and the output end is connected to the light source 20, so that the light source driver 30 can The output light brightness of the light source 20 is automatically adjusted according to the detection value of the brightness detection device 200.

In other embodiments, the light source system 100 may also not need the light source driver 30, and adopt a manual adjustment method to adjust the output light brightness of the light source 20 according to the detection value of the brightness detection device 200.

Therefore, in the present invention, the light source system 100 can adjust the output light brightness of the light source 20 according to the detection value of the brightness detection device 200 in an automatic or manual manner.

Please refer to FIGS. 3 and 4 together. In the light source system 100, the opto-mechanical housing 10 includes a substantially rectangular oblique side wall 11, a substantially circular side wall 12 and connected to the oblique A main housing 13 between the side wall 11 and the circular side wall 12, wherein the side wall 111 of the inclined side wall 11 away from the main housing 13 and the circular side wall 12 away A certain angle is formed between the wall surfaces 121 on one side of the main housing 13. Preferably, in this embodiment, the wall surface 111 of the inclined side wall 11 and the wall surface 121 of the circular side wall 12 form an angle of 45 degrees.

In other embodiments, the angle between the wall surface 111 of the inclined side wall 11 and the wall surface 121 of the circular side wall 12 may be 30 degrees, 60 degrees or other reasonable angles.

The wall surface 111 is provided with a number of threaded holes 112 and a number of positioning posts 113, the wall surface 111 is also provided with a substantially rectangular receiving cavity 114, two opposite inner sides of the receiving cavity 114 are respectively provided with a convex portion 115, so The convex portion 115 is provided with a number of positioning posts 116 and a number of threaded holes 117. The wall surface 111 is also provided with a sealing groove 118 on the periphery of the receiving cavity 114, and the sealing groove 118 is used for setting a sealing ring, The threaded hole 112 and the positioning post 113 are located around the periphery of the sealing groove 118. Specifically, in this embodiment, the four corners of the wall 111 are respectively provided with a threaded hole 112, and the opposite left and right sides of the wall 111 are respectively provided with a positioning post 113 adjacent to the two positioning posts 113 The left and right sides of the receiving cavity 114 are respectively provided with a convex portion 115, one of the convex portion 115 is provided with a positioning post 116 and a threaded hole 117, and the other convex portion 115 is provided with a positioning post 116 and two threaded holes 117.

In other embodiments, the above-mentioned threaded holes and positioning posts can be arranged in other reasonable positions, and the number can also be other reasonable numbers.

In other embodiments, the above-mentioned positioning post may be a positioning pin or a combination of a positioning post and a positioning pin.

In other embodiments, the protrusions 115 may be provided on the upper and lower inner sides of the receiving cavity 114, or may be provided on the four inner sides of the receiving cavity 114.

A substantially rectangular cavity 131 is opened in the inside of the main casing 13 on one side close to the circular side wall 12, the rectangular cavity 131 penetrates the circular side wall 12, and the main casing A light-passing hole 132 and a light-exiting hole 133 are opened in the inside of 13 near the side of the inclined side wall 11, the axis of the light-passing hole 132 is perpendicular to the axis of the light-exiting hole 133, and the light-passing hole 132 and the light exit hole 133 penetrate the bottom of the receiving cavity 114, so that the rectangular cavity 131, the light through hole 132, the light exit hole 133, and the receiving cavity 114 are in communication.

In this embodiment, the axis of the light-through hole 132 and the axis of the light-exit hole 133 respectively form an angle of 45 degrees with the wall 111.

In other embodiments, when the angle between the wall surface 111 and the wall surface 121 is an angle other than 45 degrees, the axis of the light through hole 132 and the axis of the light exit hole 133 are respectively and The wall surface 111 forms two different included angles, and the two included angles are complementary to each other.

It should be noted that the circular side wall 12 and the main housing 13 respectively have some other structural features, which are used to connect other functional elements in the optical system, due to the improvement and creation of the present invention It is irrelevant, so it will not be described in detail here.

As shown in FIGS. 5 to 10, the reflector 40 is disposed on the optical machine housing 10 and is located on the output light path of the light source system 100. Specifically, in this embodiment, the reflector 40 is installed in front of the light exit hole 133 of the optical machine housing 10, and forms a 45-degree angle with the light emitted by the light source 20, and is used to connect the light source 20 The horizontal incident light passing through the rectangular cavity 131 and the light through hole 132 is deflected by 90 degrees, so that the incident light passes through the light exit hole 133 and is emitted vertically. Wherein, the reflecting mirror 40 is a substantially square reflecting mirror.

In other embodiments, the reflector 40 may have other shapes such as a circle or a regular polygon.

It should be noted that multiple optical lenses can be provided on the output light path of the light source system 100. To simplify the description, only two optical lenses are shown as examples in the drawings of the present invention. Specifically, two optical lenses The lenses are respectively located in front of the rectangular cavity 131 and at the aperture of the light exit hole 133.

Further, the light source system 100 further includes a connecting assembly 50, the connecting assembly 50 is configured to be arranged on the opto-mechanical housing 10, and the reflector 40 is installed on the connecting assembly 50 and arranged on the connecting assembly 50. The light engine housing 10 is located on the output light path of the light source system 100.

The connecting assembly 50 includes a substantially rectangular substrate plate 51 and a fixing plate 52. The reflector 40 is mounted on the substrate plate 51 and is fixed to the optical machine housing 10 through the fixing plate 52. on. Specifically, in this embodiment, the reflector 40 is tightly attached to a surface of the substrate plate 51, and a set of pressing pieces 53 with elastic hooks is used to hold the opposite left and right sides of the reflector 40 For pressing and fixing, each pressing piece 53 has through holes at both ends and is screwed to the substrate plate 51 with a set of screws, so that the reflector 40 is mounted on the substrate plate 51, Correspondingly, a corresponding threaded hole 511 is opened on the substrate plate 51.

The material of the substrate plate 51 and the fixing plate 52 includes but is not limited to sheet metal materials, and the material of the pressing sheet 53 includes but is not limited to metal sheets.

In other embodiments, the pressing piece 53 and the substrate plate 51 may be connected by means of clamping, gluing or welding.

In other embodiments, the pressing sheet 53 and the substrate plate 51 may also be integrated.

Preferably, in this embodiment, an elastic gasket 54 is further provided between the pressing sheet 53 and the substrate plate 51, and the gasket 54 is positioned at the place by two sets of taper nails (not marked in the figure). On the substrate plate 51, and fixed by the screw connection of the pressing piece 53 and the substrate plate 51, correspondingly, the gasket 54 and the substrate plate 51 are provided with cones through which cone nails pass. The large hole of the tapered hole 541 is located on the side of the gasket 54 facing away from the substrate plate 51; the gasket 54 is also provided with a through hole 542 for the screw to pass through. The middle of the spacer 54 is provided with a square hole 543 with the same shape as the reflector 40, the area of the square hole 543 is slightly larger than the area of the reflector 40, and the reflector 40 is arranged in the square In the hole, the thickness of the spacer 54 is slightly smaller than the thickness of the reflector 40, so that, under the action of the spacer 54, the deformation amount of the elastic hook of the pressing piece 53 when the reflector 40 is fixed It is relatively small, which can prevent the pressing force of the elastic hook from being too large and damaging the reflecting surface of the reflector 40.

In other embodiments, the reflector 40 may be mounted on the substrate plate 51 by means of snapping, pasting or embedding, etc., as long as the reflector 40 is stable.

Further, the substrate plate 51 is provided with a plurality of screws 513 with threads at least at the ends, the fixing plate 52 is provided with corresponding through holes 523, and each of the screws 513 is sleeved with a spring 55. The end of the screw 513 passes through the corresponding through hole 523 and is locked and fixed by a plurality of nuts 56, and the spring 55 is located between the substrate plate 51 and the fixing plate 52.

Specifically, in this embodiment, the four corners on the other surface of the substrate plate 51 facing away from the reflector 40 are respectively protruded with screws 513 with a certain thread at one end, and the fixing plate 52 corresponds to The four corners are provided with through holes 523. Each screw 513 is respectively sleeved with a spring 55, the end of which penetrates through the through hole 523 and is locked by a nut 56. The spring 55 is located on the substrate plate 51 and Between the fixing plates 52, so that, under the action of the elastic force of the spring 55 and the locking force of the nut 56, the substrate plate 51 with the reflector 40 is fixed on the fixing plate 52 .

Wherein, the locking position of the nut 56 can be changed, that is, the length of the end of the screw 513 through the through hole 523 can be changed, and further, the position of the substrate plate 51 can be changed, correspondingly, the installation The position of the reflector 40 on the substrate plate 51 can also be changed. The reflector 40 can correct the output light angle of the light source 20 by adjusting the locking position of the nut 56.

When the length of the end of one or more screws 513 on the substrate plate 51 is changed, the reflection angle of the reflector 40 with respect to the output light path can be fine-tuned accordingly, so that the light source system 100 undergoes light output. When the light output from the hole 133 has an angular deviation, the position of the reflector 40 can be fine-tuned by changing the locking position of the nut 56 to correct the angle of the output light. The operation is simple and effective.

It should be noted that the diameter of the screw 513 is smaller than the diameter of the through hole 523 at least at the end extension, so that the axis of the screw 513 may not coincide with the axis of the through hole 523. The mirror 40 performs fine adjustment to provide a certain space for movement.

It can be understood that the reflector 40 performs output light correction within a reasonable range.

Further, the opposite left and right sides of the fixing plate 52 are provided with positioning through holes 526 corresponding to the positioning posts 116 on the optical engine housing 10, and through holes corresponding to the threaded holes 117. The fixing The plate 52 can be installed and positioned through the positioning posts 116 and the positioning through holes 526, and screwed through the corresponding through holes with the corresponding threaded holes 117 to fix the fixing plate 52 to the convex部115上. Therefore, the substrate plate 51 with the reflector 40 is fixed on the inclined side wall 11 of the optical machine housing 10 together. Specifically, the reflector 40 and the connecting assembly 50 are arranged at all. In the receiving cavity 114, the reflecting mirror 40 is located in front of the light exit hole 133.

It should be noted that the opposite left and right sides of the substrate plate 51, the pressing piece 53, and the gasket 54 are provided with concave portions (not shown in the figure) corresponding to the convex portion 115 for installation. The connecting assembly 50 of the reflecting mirror 40 is disposed in the receiving cavity 114.

Wherein, the substrate plate 51 and the fixing plate 52 both have a first light-transmitting hole 57 in an area corresponding to the output light path of the light source 20. Specifically, a first light transmission hole 57 is respectively provided in the area of the substrate plate 51 and the fixing plate 52 corresponding to the light-passing hole 132, so that the transmitted light irradiated by the incident light on the reflector 40 will not It is blocked by the connecting assembly 50. Preferably, in this embodiment, the line connecting the cores of the two first light transmission holes 57 coincides with the axis of the light transmission hole 132, which is beneficial for the transmitted light of the reflector 40 to pass through the first transmission Light hole 57.

Therefore, in the light source system 100, the incident light emitted by the light source 20 sequentially passes through the rectangular cavity 131 and the light-passing hole 132 in the opto-mechanical housing 10 to illuminate the reflector 40, and the incident light Reflection and transmission occur, and the transmitted light passes through the substrate plate 51 and the first light-transmitting hole 57 on the fixing plate 52 in turn, and is detected by the brightness of the side of the reflector 40 facing away from the incident light The device 200 detects, and further, can adjust the output light brightness of the light source 20 in an automatic or manual manner according to the detection value of the brightness detection device 200.

Further, as shown in FIG. 5, the present invention also provides a brightness detection device 200 for detecting the brightness of the output light of the aforementioned light source system 100, wherein the brightness detection device 200 is provided in the light source system 100 Therefore, the brightness detection device 200 does not affect the internal output light path of the light source system 100, and thus does not reduce the output light effect of the light source system 100.

Please refer to FIGS. 11 and 12 together. The brightness detection device 200 includes a housing 60 that is connected to the outer side of the optical machine housing 10 correspondingly, and the housing 60 is configured to be installed on the optical machine. The case 10 is on. Specifically, the housing 60 is installed on the inclined side wall 11 to seal the reflector 40 and the connecting assembly 50.

The housing 60 includes a generally rectangular oblique side wall 61, a generally triangular block-shaped main casing 63, and a generally rectangular annular flange 65 protruding from the outer surface of the main casing 63 The annular flange 65 and the outer surface of the main housing 63 form a receiving cavity 67.

Wherein, the wall surface 611 of the inclined side wall 61 is provided with a through hole 612 corresponding to the threaded hole 112, and a positioning through hole 613 corresponding to the positioning post 113, and the housing 60 can pass through the positioning post 113 is installed and positioned with the positioning through hole 613, and a screw is used to pass through the corresponding through hole 612 to be screwed with the corresponding threaded hole 112, so that the housing 60 is installed on the oblique of the optical engine housing 10 On the side wall 11.

The annular flange 65 has an end 651 away from the light source system 100, three corners of the end 651 are provided with threaded holes 652; the annular flange 65 has a substantially rectangular platform inside 653, the platform 653 is respectively provided with a threaded hole 654 along the upper and lower sides of the longitudinal direction, the surface of the platform 653 is also provided with a substantially square sink groove 655, and a circle is formed on the periphery of the sink groove 655 The sealing groove 656 is used for setting a sealing ring, and a second light transmission hole 69 is opened in the sink groove 655, and the second light transmission hole 69 penetrates the main housing 63.

A cavity 631 is opened inside the main housing 63, the cavity 631 penetrates the inclined side wall 61, and an inner surface of the main housing 63 is provided with the threaded hole 652 and the Two bosses (not marked in the figure) corresponding to the sink groove 655, the second light-transmitting hole 69 penetrates one of the bosses and communicates with the cavity 631.

Wherein, when the housing 60 is connected to the optical engine housing 10, the second light transmission hole 69 is provided corresponding to the first light transmission hole 57. Preferably, in this embodiment, the hole centers of the second light transmission hole 69 and the two first light transmission holes 57 are located on the same horizontal line, so that the transmitted light of the reflector 40 can pass through in sequence The two first light transmission holes 57 and the second light transmission hole 69.

It is understandable that when the housing 60 is connected to the optical engine housing 10, a sealing ring 15 is provided in the sealing groove 118 on the optical engine housing 10 to ensure that the housing 60 is connected to the optical engine housing 10 The sealing of the connection of the housing 10 prevents dust from entering the inner cavity of the housing, and prevents dust from adhering to the reflector 40 and affecting its light reflection and light transmission performance.

In other embodiments, the sealing groove 118 may not be provided on the wall 111 of the optical machine housing 10, and the sealing ring 15 is directly bonded to the wall 111, which can also ensure that the optical machine housing The connection between the body 10 and the housing 60 is airtight.

As shown in FIGS. 6 to 10, the brightness detection device 200 further includes a brightness sensor 70, which is disposed on the side of the reflector 40 facing away from the incident light, and is used to sense the The light intensity of the transmitted light of the reflector 40, specifically, the brightness sensor 70 is installed in the accommodating cavity 67 and located on a side away from the light source system 100.

The brightness sensor 70 can be integrated on a PCB board. The PCB board is provided with a through hole (not shown in the figure) corresponding to the threaded hole 654. A screw can be used to pass through the corresponding through hole and the corresponding The threaded hole 654 is screwed to fix the brightness sensor 70 on the surface of the platform 653 in the annular flange 65. Wherein, the sensing head 71 of the brightness sensor 70 is disposed in the sink 655, and the brightness sensing head 71 is disposed corresponding to the second light transmission hole 69, so that the brightness sensing head 71, the The second light transmission hole 69 and the first light transmission hole 57 in the light source system 100 are arranged correspondingly, and the transmitted light of the reflector 40 can sequentially pass through the two first light transmission holes 57 and the second The light-transmitting hole 69 is sensed by the brightness sensor head 71, and then the output light brightness of the light source system 100 is learned and the corresponding detection value is obtained.

It is understandable that the size of the apertures of the second light transmission hole 69 and the first light transmission hole 57 should ensure that the transmitted light passes through, so that the brightness sensor head 71 can sense the light intensity of the transmitted light. Preferably, in this embodiment, the amount of light transmitted by the second light-transmitting hole 69 and the first light-transmitting hole 57 under the irradiation of incident light increases in order.

It is also understandable that when the brightness sensor 70 is installed inside the annular flange 65, a sealing ring 75 is provided in the sealing groove 656 in the annular flange 65 to prevent dust from entering the In the sink 655, dust is prevented from adhering to the brightness sensor head 71 and affecting its photosensitive performance.

In other embodiments, the sealing groove 656 may not be provided on the surface of the platform 653, and the sealing ring 75 is directly bonded to the surface of the platform 653, which can also prevent dust from entering the sink groove 655. Inside.

Preferably, in this embodiment, in the sink 655, a glass cover 80 is provided at a position of the second light-transmitting hole 69 far from the opening of the light source system 100 to prevent dust from getting out of The second light-permeable hole 69 enters the sink 655 to prevent dust from adhering to the brightness sensor head 71 and protect its photosensitive performance.

Further, the brightness detection device 200 further includes a protective cover 90, the protective cover 90 is provided with a plurality of heat dissipation holes, the protective cover 90 is detachably mounted on the end 651 of the annular flange 65, and Cover the receiving cavity 67 to form a closed receiving space with the annular flange 65, and the brightness sensor 70 is located in the receiving space.

Specifically, in this embodiment, three corners of the protective cover 90 are provided with through holes corresponding to the threaded holes 652, and four screws are used to pass through the corresponding through holes and the corresponding threaded holes 652. For screwing and fixing, the protective cover 90 is covered on the end 651 of the annular flange 65, so that the protective cover 90 and the annular flange 65 form a closed receiving space. The sensor 70 is located in the receiving space, and the protective cover 90 can protect the brightness sensor 70.

Furthermore, in this embodiment, if the brightness sensor 70 fails and needs to be maintained or replaced, it is only necessary to simply disassemble the protective cover 90, which is convenient and quick to operate.

Therefore, in the present invention, by setting the brightness detection device 200 directly to the output light path of the light source system 100, the brightness sensor 70 senses the direct light of the light source system 100, which can avoid Affected by stray light, the detected value can accurately reflect the output light brightness of the light source system 100. Moreover, the brightness detection device 200 is installed through some simple structures, which is convenient for disassembly and maintenance, and is beneficial to be applied to various products that require brightness detection.

As shown in FIG. 13, the present invention also applies the light source system 100 to a projection device 300. The projection device 300 includes a projection display screen 330 and the above-mentioned light source system 100, wherein the projection display screen 330 The brightness of the projection screen can be adjusted by changing the brightness of the output light of the light source system 100.

Therefore, in the present invention, the light source system 100 provided with the brightness detection device 200 and the projection equipment 300 provided with the light source system 100 both have all the functions and advantages of the brightness detection device 200 described above, and can The brightness of the output light is accurately detected, and then the brightness of the output light can be adjusted as needed. In addition, the brightness detection device 200 can be installed and disassembled as required, which is convenient and quick, and does not affect the output light path of the light source.

It is understandable that the light source system 100 and the projection device 300 provided by the present invention respectively have some other functional elements, which are not related to the improvement and creation of the present invention, so they will not be described in detail here.

The above is the implementation of the embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the embodiment of the present invention, several improvements and modifications can be made. These improvements and Retouching is also regarded as the protection scope of this utility model.

Claims

A light source system, including an opto-mechanical housing and a light source, characterized in that the light source system further includes:

A reflector, the reflector is arranged on the opto-mechanical housing and used to reflect the light output by the light source;

The brightness detection device is arranged on the outer side of the opto-mechanical housing and is located on the side of the reflector facing away from the incident light, and is used for detecting the output light brightness of the light source.
The light source system according to claim 1, wherein the light source system further comprises a connecting component, the reflector is installed on the connecting component, and the connecting component is arranged on the opto-mechanical housing.
The light source system according to claim 2, wherein the connecting assembly comprises a substrate plate and a fixing plate, the reflector is mounted on the substrate plate, and is mounted on the optical chassis through the fixing plate Physically, both the substrate plate and the fixing plate are provided with a first light transmission hole in an area corresponding to the output light path of the light source, the brightness sensor head of the brightness detection device and the first light transmission hole Corresponding settings.
The light source system according to claim 3, wherein the substrate plate is provided with a plurality of screws with threads at least at the ends, the fixing plate is provided with corresponding through holes, and each screw is sleeved There is a spring, the end of the screw threaded through the corresponding through hole and locked and fixed by a nut, and the spring is located between the substrate plate and the fixing plate.
The light source system according to claim 4, wherein the locking position of the nut is adjustable, and the reflector can correct the output light angle of the light source by adjusting the locking position of the nut.
A brightness detection device is used to detect the output light brightness of a light source system. The light source system includes an optomechanical housing and a reflector. The brightness detection device is characterized in that the brightness detection device is arranged on the optomechanical housing. The brightness detection device includes:

Brightness sensor, the brightness sensor is arranged on the side of the reflecting mirror away from the incident light, and is used for sensing the light intensity of the transmitted light of the reflecting mirror.
The brightness detection device according to claim 6, wherein the brightness detection device further comprises a housing, the housing is correspondingly connected to the outside of the opto-mechanical housing, and an annular protrusion is provided on the outer surface of the housing. Edge, the annular flange and the outer surface of the housing form a receiving cavity, and the brightness sensor is arranged in the receiving cavity and located on a side away from the light source system.
The brightness detection device according to claim 7, wherein a second light transmission hole is opened in the area of the housing corresponding to the annular flange, and the brightness sensing head of the brightness sensor, the second The light transmission hole and the first light transmission hole in the light source system are correspondingly arranged.
The brightness detection device according to claim 7, wherein the brightness detection device further comprises a protective cover installed on the end of the annular flange away from the light source system and facing the receiving cavity Cover it to form a closed storage space.
A projection device, comprising a projection display screen, wherein the projection device further comprises the light source system according to any one of claims 1 to 5, and the brightness of the projection screen on the projection display screen can be changed by changing the The output light brightness of the light source system is adjusted.