A uniform illumination device

Abstract

The utility model discloses a kind of uniform illuminating devices, the uniform illuminating device includes image detector, central control unit and at least two light source providing units, image detector includes image acquisition end and image information output end;Central control unit includes image information input end and at least two luminance instruction output ends;Image information input end is electrically connected with image information output end;Each light source providing unit includes luminance instruction input end, each luminance instruction input end is electrically connected with each luminance instruction output end.The technical scheme of the utility model, zoning control can improve luminance uniformity, so that the luminance uniformity of uniform illuminating device in the field of view of illumination, improve the luminance uniformity of uniform illuminating device.

Description

Technical Field

[0001] This utility model relates to the field of uniform lighting technology, and in particular to a uniform lighting device. Background Technology

[0002] Active lighting technology, characterized by its high adaptability due to the freedom to select and adjust light sources, is widely used in lighting applications with complex lighting conditions. Currently, point light sources are commonly used in most applications due to their low cost and adaptability; however, point light source lighting equipment suffers from low image uniformity and significant color difference. In contrast, LED surface light sources offer higher illumination uniformity, can be configured with different wavelengths of LEDs to meet the needs of multispectral imaging, and operate using low-voltage power, making them safer and more reliable.

[0003] However, LED surface light sources with constant brightness, due to their characteristics of uniform illumination and poor adjustability, are mostly used in factories and laboratories for defect detection of parts and to provide uniform lighting in low-light environments. Given the complex and variable underwater environment, considering factors such as uneven light distribution in flowing water and strong time-varying illumination, it is difficult for surface light sources with constant brightness to achieve uniform lighting in complex environments. Utility Model Content

[0004] This invention provides a uniform lighting device that can improve the brightness uniformity of the uniform lighting device.

[0005] This utility model provides a uniform lighting device, characterized in that it includes:

[0006] An image detector, comprising an image acquisition end and an image information output end;

[0007] The central control unit includes an image information input terminal and at least two brightness command output terminals; the image information input terminal and the image information output terminal are electrically connected.

[0008] At least two light source providing units, each light source providing unit including a brightness command input terminal, and each brightness command input terminal being electrically connected to each brightness command output terminal.

[0009] Optionally, the light source area of ​​the light source providing unit is S;

[0010] Among them, 400cm 2 ≤S≤1600cm 2 .

[0011] Optionally, the central control unit includes at least two grayscale value calculation subunits and a brightness determination subunit;

[0012] The grayscale value calculation subunit includes a grayscale average value output terminal and multiple grayscale value input terminals, and each grayscale value input terminal is electrically connected to the image information output terminal;

[0013] The brightness determination subunit includes at least two grayscale value providing terminals and at least two brightness output terminals. The grayscale value providing terminals are electrically connected to the grayscale average value output terminal, and the brightness output terminals are electrically connected to the brightness command output terminal.

[0014] Optional, the uniform lighting device also includes:

[0015] The controller is electrically connected to the central control unit and each of the light source providing units; the controller also includes at least two light source control terminals, which are electrically connected to the brightness command input terminals of the light source providing units.

[0016] Optionally, the controller includes a heat dissipation unit.

[0017] Optionally, the uniform lighting device may also include: a housing, a sealing ring, and a cover plate;

[0018] The image detector, the central control unit, and the light source providing unit are located within the enclosed space formed by the housing and the cover plate, with the sealing ring located between the cover plate and the housing.

[0019] Optional, the uniform lighting device also includes:

[0020] The position adjustment structure is provided, and each of the light source providing units is fixed on the position adjustment structure.

[0021] Optionally, the uniform lighting device may also include: a base plate, a first base rod, a second base rod, and a movable mounting frame;

[0022] The first base rod and the second base rod are fixed to the base plate, and the first base rod and the second base rod are arranged along the first direction;

[0023] The movable mounting frame is located between the first base rod and the second base rod, and the light source providing unit is placed on the movable mounting frame.

[0024] Optional, the uniform lighting device also includes:

[0025] The remote control terminal is communicatively connected to the central control unit.

[0026] Optionally, the image detector includes a wide-angle lens and a monochrome CMOS sensor.

[0027] The technical solution of this utility model involves setting up an image detector to obtain images within the field of view that can be illuminated by the light source providing unit, and transmitting the image information to the central control unit. The central control unit can determine the current brightness of the area illuminated by each light source providing unit based on the image information provided by the image detector, and then determine the brightness control command for each light source providing unit. This allows each light source providing unit to provide the corresponding illumination brightness under the action of each brightness control command. Zone control can improve brightness uniformity, making the brightness within the field of view of the uniform illumination device uniform, thus improving the brightness uniformity of the uniform illumination device. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, although the drawings described below are some specific embodiments of this utility model, those skilled in the art can extend and extend to other structures and drawings based on the basic concepts of the device structure, driving method and manufacturing method disclosed and indicated by the various embodiments of this utility model. Undoubtedly, these should all be within the scope of the claims of this utility model.

[0029] Figure 1 A schematic diagram of the structure of a uniform lighting device provided in an embodiment of this utility model;

[0030] Figure 2 A schematic diagram of another uniform lighting device provided in an embodiment of this utility model;

[0031] Figure 3 A schematic diagram of the structure of an image detector provided in an embodiment of this utility model;

[0032] Figure 4 A schematic diagram of another uniform lighting device provided in an embodiment of this utility model;

[0033] Figure 5 A schematic diagram of the structure of another uniform lighting device provided in this embodiment of the utility model;

[0034] Figure 6 A schematic diagram of the structure of a controller provided in an embodiment of this utility model;

[0035] Figure 7 A schematic diagram of the structure of a central control unit provided in an embodiment of this utility model;

[0036] Figure 8 A schematic diagram of the overall structure of a uniform lighting device provided in an embodiment of this utility model;

[0037] Figure 9A partial structural schematic diagram of a uniform lighting device provided in an embodiment of this utility model;

[0038] Figure 10 A partial structural schematic diagram of another uniform lighting device provided in an embodiment of this utility model. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the basic concepts disclosed and indicated in the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0040] Figure 1 This is a schematic diagram of the structure of a uniform lighting device provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the uniform illumination device 100 includes an image detector 10, a central control unit 20, and at least two light source providing units 40. The image detector 10 includes an image acquisition end and an image information output end; the central control unit 20 includes an image information input end and at least two brightness command output ends; the image information input end and the image information output end are electrically connected; the at least two light source providing units 40 each include a brightness command input end, and each brightness command input end is electrically connected to its respective brightness command output end.

[0041] The image detector 10 includes image acquisition devices such as CMOS or CCD, the central control unit 20 includes processors, and the light source providing unit 40 can be a surface light source array, including light-emitting devices such as diodes arranged in an array. It can be set according to actual needs, and no specific limitation is made here.

[0042] Specifically, the image acquisition end of the image detector 10 can be a camera, capable of capturing or photographing images within the field of view illuminated by the light source providing unit 40. After acquiring the image, the image detector 10 can transmit information such as grayscale values ​​from the image to the central control unit 20 through the image information output end and the image information input end. The central control unit 20 can determine the current brightness of the area illuminated by each light source providing unit based on the image information provided by the image detector, and then determine a brightness control command based on the current brightness and the required brightness. The brightness control command can be input to the brightness command input end of the light source providing unit 40 through the brightness command output end, so that the light source providing unit 40 can adjust the brightness of the currently emitted light source according to the brightness control command, thereby improving the uniformity of light intensity during the illumination time of the uniform illumination device.

[0043] It should be noted that the light source providing unit 40 may include 255 brightness levels or 999 brightness levels. The light source providing unit 40 can be in different brightness levels under different brightness commands to emit beams of corresponding brightness levels.

[0044] The technical solution of this utility model involves setting up an image detector to obtain images within the field of view that can be illuminated by the light source providing unit, and transmitting the image information to the central control unit. The central control unit can determine the current brightness of the area illuminated by each light source providing unit based on the image information provided by the image detector, and then determine the brightness control command for each light source providing unit. This allows each light source providing unit to provide the corresponding illumination brightness under the action of each brightness control command. Zone control can improve brightness uniformity, making the brightness within the field of view of the uniform illumination device uniform, thus improving the brightness uniformity of the uniform illumination device.

[0045] It should be noted that, Figure 1 The diagram only shows a uniform illumination device including two light source providing units 40, namely a first light source providing unit 401 and a second light source providing unit 402. In other optional embodiments, the uniform illumination device may also include two or more light source providing units 40, such as... Figure 2 As shown, the uniform lighting device includes eight light source providing units 40, but may also be other types, which are not specifically limited here.

[0046] Optional, Figure 3 This is a schematic diagram of the structure of an image detector provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the image detector 10 includes a wide-angle lens 101 and a monochrome CMOS sensor 103.

[0047] The wide-angle lens 101 can capture larger images within a limited shooting distance, featuring a short focal length and a wide angle of view. The monochrome CMOS sensor 103 can acquire all the light information of the image and output grayscale values ​​of the image.

[0048] Specifically, by setting the image detector 10 to include a wide-angle lens 101 and a monochrome CMOS sensor 103, the image detector 10 can cover a larger detection area and reduce blind spots. Combined with the high definition and high contrast of the monochrome CMOS sensor 103, the accuracy and reliability of features such as grayscale values ​​of each pixel in the output image of the image detector 10 can be improved, thereby improving the reliability of subsequent brightness adjustment.

[0049] It should be noted that the image detector 10 also includes an FPC connector 105, and the image information output terminal of the image detector 10 can be electrically connected to the image information input terminal of the central control unit 20 through the FPC connector 105. The uniform illumination device also includes a detector adapter 104, on which the image detector 10 can be fixed, and then the detector adapter 104 can be fixed to the base plate of the uniform illumination device.

[0050] Optionally, the light source area of ​​the light source providing unit 40 is S; where 400cm² 2 ≤S≤1600cm 2 .

[0051] Specifically, if the light source area S of a single light source providing unit 40 is greater than 1600 cm² 2 If the grayscale value of some areas in the image corresponding to the light source providing unit 40 differs significantly from that of other areas, then when illuminated by a light source of the same brightness, the image brightness of the corresponding area of ​​the light source providing unit 40 will vary greatly, resulting in poor brightness uniformity. If the light source area S of a single light source providing unit 40 is less than 400 cm², this will cause significant differences in brightness. 2 This would result in a larger number of transmission lines in the uniform lighting device, increasing its structural complexity. Therefore, the light source area S of the light source providing unit 40 is set at 400 cm². 2 ~1600cm 2 This allows for zoned control of the illumination intensity of the uniform lighting device, improving the uniformity of brightness control while reducing the structural complexity of the uniform lighting device, decreasing the number of internal circuits, and simplifying the overall structure. For example, the size of the light source providing unit 40 can be 30cm x 30cm, but other sizes are not specifically limited here.

[0052] Optional, Figure 4 A schematic diagram of another uniform lighting device provided in an embodiment of this utility model is shown below. Figure 4 As shown, the central control unit 20 includes at least two grayscale value calculation subunits 21 and a brightness determination subunit 22; the grayscale value calculation subunit 21 includes a grayscale average value output terminal and multiple grayscale value input terminals, each grayscale value input terminal being electrically connected to an image information output terminal; the brightness determination subunit 22 includes at least two grayscale value providing terminals and at least two brightness output terminals, the grayscale value providing terminals being electrically connected to the grayscale average value output terminal, and the brightness output terminals being electrically connected to a brightness command output terminal.

[0053] The grayscale value calculation subunit 21 and the brightness determination subunit 22 may include devices such as capacitors and resistors, which can be set according to actual needs, and no specific limitation is made here.

[0054] Specifically, the number of grayscale value calculation subunits 21 is the same as the number of light source providing units 40. Each grayscale value calculation subunit 21 can calculate the grayscale value of the corresponding illumination area of ​​the light source providing unit 40. The multiple grayscale value input terminals of the grayscale value calculation subunit 211 can obtain the grayscale value of each pixel in the illumination image corresponding to the light source providing unit 401, and then calculate the average grayscale value of the illumination area. The average grayscale value is transmitted to the brightness determination subunit 22 through the grayscale value output terminal. The brightness determination subunit 22 stores the correspondence between the average grayscale value and the control command. It can use the control command corresponding to the currently input average grayscale value as a brightness command and output it to the light source providing unit 401 so that the light source providing unit 401 can provide the corresponding light beam to the illumination field of view under the brightness command. The corresponding light source providing unit 402 may also provide a light beam to the field of view of the light source providing unit under the corresponding brightness command so that the brightness of the duration image corresponding to the light source providing unit 401 and the duration image corresponding to the light source providing unit 402 is consistent, thereby improving the brightness uniformity of the uniform illumination device.

[0055] Optional, Figure 5 A schematic diagram of another uniform lighting device provided in this embodiment of the present invention is shown below. Figure 5 As shown, the uniform lighting device also includes a controller 30, which is electrically connected to the central control unit 20 and each light source providing unit 40 respectively; the controller 30 also includes at least two light source control terminals, which are electrically connected to the brightness command input terminals of the light source providing units 40.

[0056] The number of light source control terminals is the same as the number of light source providing units 40, and each light source control terminal is electrically connected to each light source providing unit 40 in a one-to-one correspondence.

[0057] Specifically, a controller 30 is installed between the central control unit 20 and the light source supply unit 40. When there is no signal input from the light source control terminal, the brightness command provided by the central control unit 20 is used as the standard. The controller 30 then acts as a command transmitter, transmitting the brightness command to the light source supply unit 40 to achieve adaptive brightness adjustment. When there is a signal input from the light source control terminal, the controller 30 uses the signal input from the light source control terminal as the standard and transmits the brightness control command input from the light source control terminal to the light source supply unit 40. Thus, during the experimental or commissioning phases, brightness commands can be manually input to the light source control terminal, improving ease of use.

[0058] In an optional embodiment, Figure 6 A schematic diagram of the structure of a controller provided for an embodiment of this utility model is shown below. Figure 6 As shown, the light source control terminal 36 in the controller 30 is a knob, which can be manually rotated to input different brightness levels. Figure 6 The diagram shows a controller 30 including eight light source control terminals 36, and a structure suitable for a uniform lighting device including eight light source providing units 40.

[0059] Optional, continue to refer to Figure 6 The controller 30 includes a heat dissipation unit 302.

[0060] Specifically, the heat dissipation unit 302 includes a fan, etc., which can dissipate the heat generated by the controller 30 during operation and improve the service life of the controller 30. In addition, the controller 30 also includes a power supply terminal 304, a signal input port 303, and a power module 301. The power supply terminal 304 is electrically connected to the power module 301, and the power module 301 can provide the controller 30 with the power required for operation through the power supply terminal 304 to enable the controller 30 to operate normally. The signal input port 303 can be electrically connected to the brightness command output terminal of the central control unit 20 to receive the brightness command signal provided by the central control unit 20. The controller 30 is also provided with a fixing member 33, including a first fixing bracket 331 and a second fixing bracket 332, so that the controller 30 can be fixed to the base plate of the uniform distribution device by the fixing member 33.

[0061] Figure 7 A schematic diagram of the structure of a central control unit provided in an embodiment of this utility model is shown below. Figure 7 As shown, the central control unit 20 also includes a power interface 201 and a network external interface 202. The power interface 201 can be electrically connected to a power supply module to provide the central control unit 20 with the power required for operation. The network external interface 202 can connect to external control units such as host computers to output image information to the external host computer for further processing. The grayscale value calculation subunit and brightness determination subunit in the central control unit 20 are located in the motherboard 204. The image information input terminal in the central control unit 20 is the FPC interface 203, and the brightness command output terminal is a protocol port 205 that can transmit communication protocol information.

[0062] Optional, Figure 8 A schematic diagram of the overall structure of a uniform lighting device provided in an embodiment of this utility model is shown below. Figure 8 As shown, the uniform lighting device also includes a housing 603, a sealing ring 602, and a cover plate 601. The image detector 10, the central control unit 20, and the light source providing unit 40 are located within the enclosed space formed by the housing 603 and the cover plate 601, and the sealing ring 602 is located between the cover plate 601 and the housing 603.

[0063] The enclosure 603 may include metal materials such as aluminum alloy, the cover 601 may include light-transmitting materials such as glass, and the sealing ring 602 may include materials such as rubber. These can be set according to actual needs, and no specific limitations are made here.

[0064] Specifically, the image detector 10, the central control unit 20, and the light source supply unit 40 are all placed in the housing 603 and covered with a cover plate 601. A sealing ring 602 is set between the cover plate 601 and the housing 603 to improve the airtightness of the enclosed space, protect the image detector 10, the central control unit 20, and the light source supply unit 40, and improve the safety and service life of the uniform lighting device.

[0065] Optional, Figure 9 A partial structural schematic diagram of a uniform lighting device provided in an embodiment of this utility model is shown below. Figure 9 As shown, the uniform lighting device also includes a position adjustment structure 50, and each light source providing unit 40 is fixed on the position adjustment structure 50.

[0066] The position adjustment structure 50 may include a slide rail or other position-adjustable structure, which can be set according to actual needs, and no specific limitation is made here.

[0067] Specifically, by setting a position adjustment structure 50, after the light source providing unit 40 is fixed on the position adjustment structure 50, the position adjustment structure 50 can drive the light source providing unit 40 to move in one or more directions, so that the light beam emitted by the light source providing unit 40 can meet the brightness requirements of different fields of view and improve the multi-scene applicability of the light source providing unit 40.

[0068] Optional, Figure 10 A partial structural schematic diagram of another uniform lighting device provided in an embodiment of this utility model is shown below. Figure 10 As shown, the uniform lighting device also includes a base plate 80, a first base rod 501 and a second base rod 502, and a movable mounting frame 503; the first base rod 501 and the second base rod 502 are fixed on the base plate 80, and the first base rod 501 and the second base rod 502 are arranged along the first direction X; the movable mounting frame 503 is located between the first base rod 501 and the second base rod 502, and the light source providing unit 40 is placed on the movable mounting frame 503.

[0069] The first base rod 501 and the second base rod 502 include slide rails, etc. The movable mounting frame 503 includes a first end and a second end. The first end is connected to the first base rod 501, and the second end is connected to the second base rod 502. The movable mounting frame 503 can move along the extension direction of the first base rod 501 or the second base rod 502, and / or, the movable mounting frame 503 can tilt towards or away from the base plate 80. Appropriate connecting parts can be provided according to actual needs. In this way, the light source providing unit 40 located on the movable mounting frame 503 can achieve light source illumination at different angles, improving the application scenarios of the uniform lighting device.

[0070] It should be noted that the uniform lighting device may include multiple first base poles and second base poles to increase the number of light source providing units 40 that can be placed. The specific number of base poles and the number of movable mounting frames can be set according to actual needs, and no specific limitation is made here.

[0071] Optionally, the uniform lighting device also includes a remote control terminal, which is communicatively connected to the central control unit 20.

[0072] The remote control terminal may include a mobile APP, a monitoring host, and other control and management platforms.

[0073] Specifically, the remote control terminal can acquire the data information stored in the central control unit 20 in real time, and can output a remote control signal to the central control unit 20 based on the data information, so that the central control unit 20 can provide a corresponding brightness command to the light source providing unit 40 based on the remote control signal, so that the user can remotely control the lighting brightness of the uniform lighting device and improve the ease of use.

[0074] It is understood that the uniform illumination device provided by this utility model can adaptively adjust the illumination intensity of the light source providing unit based on complex and ever-changing lighting environments. In natural environments, lighting conditions are often complex and change constantly over time, which can affect the uniformity of imaging. By adaptively adjusting the beam intensity or beam brightness, the system can meet the lighting needs of different times and locations, which is beneficial for providing uniform imaging effects for applications such as image recognition. Secondly, this solution can adjust the spatial layout and illumination tilt angle of the light source providing device in advance according to the deployment environment, and arrange the illumination array in advance, which can improve the applicability of the uniform illumination device to various environments, thereby further improving the uniformity of illumination and reducing the color difference in imaging of other devices. This uniform illumination device can be applied to complex and ever-changing lighting environments and can provide uniform illumination for imaging and image recognition devices.

[0075] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A uniform lighting device, characterized in that, include: An image detector, comprising an image acquisition end and an image information output end; The central control unit includes an image information input terminal and at least two brightness command output terminals; The image information input terminal is electrically connected to the image information output terminal; At least two light source providing units, each light source providing unit including a brightness command input terminal, and each brightness command input terminal being electrically connected to each brightness command output terminal.

2. The uniform lighting device according to claim 1, characterized in that, The area of ​​the light source providing unit is S; Among them, 400cm 2 ≤S≤1600cm 2 .

3. The uniform lighting device according to claim 1, characterized in that, The central control unit includes at least two grayscale value calculation subunits and a brightness determination subunit; The grayscale value calculation subunit includes a grayscale average value output terminal and multiple grayscale value input terminals, and each grayscale value input terminal is electrically connected to the image information output terminal; The brightness determination subunit includes at least two grayscale value providing terminals and at least two brightness output terminals. The grayscale value providing terminals are electrically connected to the grayscale average value output terminal, and the brightness output terminals are electrically connected to the brightness command output terminal.

4. The uniform lighting device according to claim 1, characterized in that, Also includes: The controller is electrically connected to the central control unit and each of the light source providing units; the controller also includes at least two light source control terminals, which are electrically connected to the brightness command input terminals of the light source providing units.

5. The uniform lighting device according to claim 4, characterized in that, The controller includes a heat dissipation unit.

6. The uniform lighting device according to claim 1, characterized in that, Also includes: Box body, sealing ring, and cover plate; The image detector, the central control unit, and the light source providing unit are located within the enclosed space formed by the housing and the cover plate, with the sealing ring located between the cover plate and the housing.

7. The uniform lighting device according to claim 1, characterized in that, Also includes: The position adjustment structure is provided, and each of the light source providing units is fixed on the position adjustment structure.

8. The uniform lighting device according to claim 1, characterized in that, Also includes: Base plate, first base rod, second base rod, and movable mounting frame; The first base rod and the second base rod are fixed to the base plate, and the first base rod and the second base rod are arranged along the first direction; The movable mounting frame is located between the first base rod and the second base rod, and the light source providing unit is placed on the movable mounting frame.

9. The uniform lighting device according to claim 1, characterized in that, Also includes: The remote control terminal is communicatively connected to the central control unit.

10. The uniform lighting device according to claim 1, characterized in that, The image detector includes a wide-angle lens and a monochrome CMOS sensor.

Images