CN210670665U - LED light source system - Google Patents
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- CN210670665U CN210670665U CN201921665882.8U CN201921665882U CN210670665U CN 210670665 U CN210670665 U CN 210670665U CN 201921665882 U CN201921665882 U CN 201921665882U CN 210670665 U CN210670665 U CN 210670665U
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Abstract
The utility model discloses a LED light source system, which mainly comprises an MCU controller, a constant current source connected with the MCU controller, an LED constant current dimming module, an LED light source abnormity protection circuit and an LED light source working state monitoring circuit; the LED constant-current dimming module comprises a D/A conversion circuit, an analog signal processing circuit, a DC voltage circuit and an LED constant-current circuit which are sequentially connected, wherein the input end of the DC voltage circuit is connected with a constant current source, the output end of the DC voltage circuit is connected with an LED light source working state monitoring circuit, the output end of the LED constant-current circuit is connected with an LED light source and camera stroboscopic module, and the input end of the LED constant-current circuit is connected with an LED light source abnormity protection circuit. The utility model discloses a DC voltage circuit and LED constant current circuit component LED constant current dimmer circuit have independent hardware stroboscopic circuit and the unusual protection circuit of parallel light source, can realize that light source luminance adjustable range is wide to can be synchronous with the camera real-time stroboscopic.
Description
Technical Field
The utility model relates to a machine vision field especially relates to a LED light source system.
Background
The core of the machine vision system is image acquisition and processing, all information comes from images, and the quality of the images is very critical to the whole vision system. The light source is an important factor affecting the image level of the machine vision system, since it directly affects the quality of the input data and the effect of at least 30% of the applications. Commonly used light sources include LED light sources, halogen lamps (optical fiber light sources), high-frequency fluorescent lamps, and the like. The LED light source has the advantages of high response speed, stable performance, flexible combination mode, various colors, low power consumption, long service life and the like, and is widely applied to the field of mechanical vision illumination. LED light sources used in the field of machine vision have increased demands on their performance and stability, which require controllers driving the LED light sources.
Currently, in industrial detection, a constant-current stroboscopic LED light source system generally adopts a normally-on high-power LED light source to provide light for a camera. In the actual operation process, in order to obtain a better signal-to-noise characteristic of the obtained image, the light-supplying intensity of the LED light source needs to be increased, so as to realize brightness adjustment. However, because the exposure time of the camera is short, the high-power LED light source directly wastes a large amount of electric energy by adopting a normally-on mode; meanwhile, the normally-on mode directly enables the LED light source to be in a high-temperature heating state for a long time, and the actual service life of the LED light source is extremely easy to reduce rapidly.
In the industrial detection field, in order to realize high-efficient detection, the detection object moves to the camera detection field of view within range, and the camera triggers the light source to light, and the camera exposes and shoots this moment, so the real-time requirement is higher. However, the current constant-current stroboscopic LED light source is basically that a camera trigger signal passes through a CPU, and the CPU software processes the signal and then controls an LED constant-current dimming circuit to implement stroboscopic operation, and software programs are slow in running speed and cannot implement stroboscopic operation in real time. In addition, due to the stroboscopic of the camera, the abnormal working state of the LED light source is easily caused, and the overheating phenomenon of the LED light source is also easily caused.
Therefore, it is desirable to provide a new LED light source system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a LED light source system is provided, can realize that light source luminance adjustable range is wide to can be synchronous with the camera and stroboscopic in real time.
In order to solve the technical problem, the utility model discloses a technical scheme be: the LED light source system mainly comprises an MCU controller, a constant current source connected with the MCU controller, an LED constant current dimming module, an LED light source abnormity protection circuit and an LED light source working state monitoring circuit;
the LED constant-current dimming module comprises a D/A conversion circuit, an analog signal processing circuit, a DC voltage circuit and an LED constant-current circuit which are sequentially connected, wherein the input end of the DC voltage circuit is connected with a constant current source, the output end of the DC voltage circuit is connected with an LED light source working state monitoring circuit, the output end of the LED constant-current circuit is connected with an LED light source and camera stroboscopic module, and the input end of the LED constant-current circuit is connected with an LED light source abnormity protection circuit.
In a preferred embodiment of the present invention, the DC voltage circuit includes resistors R11-R14, capacitors C2-C6, diodes D3-D4, inductor L1, and voltage regulation chip U1, the positive terminal of diode D3 is connected to resistor R11, the negative terminal is connected in parallel to resistors R12-R14 and the 4 th pin of voltage regulation chip U1, the other terminal of resistor R14 is connected to capacitor C2, the other terminal of resistor R11 is connected to the analog signal processing circuit, one terminal of inductor L1 is connected to the negative terminal of diode D4 and the voltage output port of voltage regulation chip U1, the other terminal is connected in parallel to capacitors C2, C5, C6 and the dimming reference feedback port of the LED constant current dimming circuit, and the voltage input port of voltage regulation chip U1 is connected in parallel to the capacitors C3, C4 and +24V constant current source.
In a preferred embodiment of the present invention, the constant current source includes a DC/DC conversion circuit and a DC power input interface, wherein the input terminal of the DC/DC conversion circuit is connected to the MCU controller, and the output terminal of the DC/DC conversion circuit is connected to the DC power input interface.
In a preferred embodiment of the present invention, the camera strobe module includes a camera TRIG interface and a TRIG conversion circuit, and the camera TRIG interface is connected to the LED constant current circuit through the TRIG conversion circuit.
In a preferred embodiment of the present invention, the TRIG switching circuit includes resistors R5-R10, diode D2, and transistor Q2, a positive connection resistor R7 and a negative connection resistor R9 of the diode D2, a base of the transistor Q2 is connected to the other end of the resistor R9, a resistor R10 is connected in parallel between the base and the emitter of the transistor Q2, a collector of the transistor Q2 is connected in parallel to the resistors R5, R6, R8, and an EN port of the LED constant current circuit, and the other ends of the resistors R5-R7 are connected to +12 VDC.
In a preferred embodiment of the present invention, the LED light source abnormality protection circuit includes resistors R1-R4, a transistor Q1, a TVS transient suppression diode D1, a capacitor C1, a Con _1 pin of the MCU controller is connected to one end of the resistor R2, a base of the transistor Q1 is connected to the other end, a resistor R4 is connected in parallel between the base and the emitter of the transistor Q1, an EN port of the LED constant current circuit and a resistor R1 are connected to a collector of the diode Q1, the other end of the resistor R1 is connected to the resistor R3, a capacitor C1, a TVS transient suppression diode D1, and an AD2 pin of the MCU controller are connected in parallel, the resistor R3 and the capacitor C1 are connected in parallel to form an RC filter circuit, and the other end of the TVS transient suppression diode D1 is connected to a +3.
In a preferred embodiment of the present invention, the LED constant current circuit includes a resistor R21, a constant current driving chip DD311, and a plurality of light emitting diodes, the 1 st pin of the constant current driving chip DD311 is connected with the resistor R21, the 2 nd pin is connected with the plurality of light emitting diodes in series, and the other end of the resistor R21 is connected with the voltage output pin V11 of the DC voltage circuit.
In a preferred embodiment of the present invention, the LED light source controller further includes a communication module, a key circuit, a power down storage circuit, a nixie tube display module, and a work indicator connected to the MCU controller.
Further, the communication module adopts an MAX232 serial port communication circuit or an RS485 serial port communication circuit.
For solving the technical problem, the utility model discloses a another technical scheme is: the LED light source system mainly comprises an MCU controller, a plurality of paths of LED light sources, a constant current source connected with the MCU controller, a plurality of paths of parallel LED constant current dimming modules, an LED light source abnormity protection circuit and an LED light source working state monitoring circuit;
the LED constant-current dimming module comprises a D/A conversion circuit, an analog signal processing circuit, a DC voltage circuit and an LED constant-current circuit which are sequentially connected; the input end of the DC voltage circuit is connected with the constant current source, and the output end of the DC voltage circuit is connected with the LED light source working state monitoring circuit; the output end of the LED constant current circuit is connected with the LED light source and the camera stroboscopic module, and the input end of the LED constant current circuit is connected with the LED light source abnormity protection circuit;
the LED constant current circuits are connected in parallel, and the LED constant current circuits are connected with an LED light source.
The utility model has the advantages that:
(1) the utility model discloses a DC voltage circuit and LED constant current circuit constitute LED constant current dimming circuit, and DC voltage circuit adopts the voltage linearity adjustable to adjust the constant current source benchmark and realizes that LED current linearity is adjustable, and luminous brightness uniformity is better, adopts MCU controller control D/A output voltage simultaneously, and then enlarges the D/A output voltage scope through analog signal processing circuit to realize that LED light source dimming range is wider, reach industrial equipment to the light source brightness control demand;
(2) the utility model discloses have independent hardware stroboscopic circuit, need not MCU controller control, response speed is faster, realizes ns level time delay, and like this when the measured object material developments is through the check point, the camera comes trigger signal, and the LED light source just can light in real time, and the camera exposes the formation in real time, realizes high-efficient detection, and is better with the real-time synchronism of camera;
(3) the utility model discloses have parallel light source abnormal protection circuit, realized not influencing under the condition of independent stroboscopic circuit work, realize the protection when the light source is unusual to guarantee the reliable work of light source.
Drawings
Fig. 1 is a block diagram of a preferred embodiment of the LED light source system of the present invention;
FIG. 2 is a block diagram of another preferred embodiment of the LED light source system;
FIG. 3 is a circuit diagram of the DC voltage circuit;
FIG. 4 is a circuit diagram of the LED constant current circuit;
FIG. 5 is a circuit diagram of the camera strobe circuit;
fig. 6 is a circuit diagram of the LED light source abnormality protection circuit.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1, an embodiment of the present invention includes:
an LED light source system takes a four-channel LED light source as an example and mainly comprises an MCU controller, four channels of LED light sources, a constant current source connected with the MCU controller, four channels of parallel LED constant current dimming modules, an LED light source abnormity protection circuit and an LED light source working state monitoring circuit; the device also comprises a communication module, a key circuit, a power-down storage circuit, a nixie tube display module and a four-channel working indicator lamp which are connected with the MCU controller. The four LED constant current circuits are connected in parallel. The communication module adopts an MAX232 serial port communication circuit or an RS485 serial port communication circuit, and in this embodiment, an MAX232 serial port communication circuit is adopted. The nixie tube display module comprises a nixie tube driving circuit connected with the MCU controller and a nixie tube four-channel display circuit connected with the nixie tube driving circuit. The four-path constant current source dimming module realizes that each path of light source outputs according to a set constant current, so that the light source output light is stable.
Preferably, the MCU controller adopts a microprocessor STM32F103RBT6, and is small in size and powerful. The constant current source comprises a DC/DC conversion circuit and a DC power input interface, wherein the input end of the DC/DC conversion circuit is connected with the MCU controller, and the output end of the DC/DC conversion circuit is connected with the DC power input interface. The stability of the LED light source system is effectively ensured through the DC power supply.
The LED light source system is described in detail below with reference to fig. 2 by taking any one channel LED light source as an example:
the LED constant-current dimming module comprises a D/A conversion circuit, an analog signal processing circuit, a DC voltage circuit and an LED constant-current circuit which are sequentially connected. The module adopts the MCU controller to control the D/A output voltage, and then enlarges the D/A output voltage range through the analog signal processing circuit, thereby realizing wider dimming range of the LED light source and meeting the requirement of industrial equipment on light source brightness regulation. In this embodiment, the analog signal processing circuit employs a four-channel commercial operational amplifier LMV 324.
The input end of the DC voltage circuit is connected with the constant current source, and the output end of the DC voltage circuit is connected with the LED light source working state monitoring circuit. Referring to fig. 3, the DC voltage circuit includes resistors R11-R14, capacitors C2-C6, diodes D3-D4, an inductor L1, and a voltage regulating chip U1, and the connection relationship of the circuit components is shown in the figure. The positive electrode of the diode D3 is connected with a resistor R11, the negative electrode of the diode D3 is connected with the 4 th pin of the resistors R12-R14 and the voltage regulating chip U1 in parallel, the other end of the resistor R14 is connected with a capacitor C2, the other end of the resistor R11 is connected with the analog signal processing circuit, one end of the inductor L1 is connected with the negative electrode of the diode D4 and the voltage output port of the voltage regulating chip U1, the other end of the inductor L1 is connected with capacitors C2, C5 and C6 and the dimming reference feedback port of the LED constant current dimming circuit in parallel, and the voltage input port of the voltage regulating chip U1 is connected with capacitors C3. Preferably, the voltage regulating chip U1 adopts LM 2596S.
The MCU controller outputs an A/D signal, the voltage signal of the A/D passes through the analog signal processing circuit to generate a voltage signal of amplified voltage amplitude, and the signal is transmitted to a reference port (a 4 th pin) of the LM2596S and the output voltage V11 for proportional feedback, so that the output voltage V11 is a linear stable voltage (0-24V) in a large voltage range. The variable voltage of 0-24V is connected to a dimming reference feedback port (pin 1 of DD 311) of the LED constant current circuit, so that the LED constant current circuit can regulate an LED light source in a controllable and large-range manner and achieve proper stable brightness and stable light. The DC voltage circuit adopts voltage linearity adjustable to adjust the constant current source reference to realize LED current linearity adjustable, and the consistency of the luminous brightness is better.
The output end of the LED constant current circuit is connected with the LED light source and the camera stroboscopic module, and the input end of the LED constant current circuit is connected with the LED light source abnormity protection circuit. In addition, one LED light source can also be connected with a plurality of paths of LED constant current circuits, each LED light source consists of a plurality of paths of light emitting diodes which are connected in parallel, the number of the light emitting diodes is not limited, and the number of the light emitting diodes is 5, 8, 17 and the like. And each LED light source is provided with an interface connected with the MCU controller. With reference to fig. 4, one LED light source is composed of 8 LED constant current circuits with the same circuit structure, and taking the first LED constant current circuit as an example, the LED constant current circuit includes a resistor R21, a constant current driving chip DD311, and seven light emitting diodes D11-D17. The 1 st pin of the constant current driving chip DD311 is connected with a resistor R21, the 2 nd pin is connected with seven light emitting diodes D17-D11 in series, the 3 rd pin and the 4 th pin are grounded, the 5 th pin is an ENABLE port, and the other end of the resistor R21 is connected with a voltage output pin V11 of a DC voltage circuit. The 8-path LED constant current circuits are connected in parallel through a voltage output pin V11, and the voltage reference is continuously adjustable from 0V to 24V. One path of LED constant current circuit is controlled by one path of constant current driving chip to realize one path of constant current, and a plurality of paths of same LED constant current circuits are combined together to form a high-power LED light source, so that the illumination requirement of the LED high-power light source is met. The 5 th pins of the multi-channel constant current driving chip DD311 are connected in parallel to be connected to a camera stroboscopic circuit, so that real-time stroboscopic is realized. The constant current driving chip DD311 has a constant current function, the response speed is high, and the stroboscopic response speed is higher by adopting the constant current switch to drive the chip to enable the on-off control.
In practical application, the LED constant current circuit is designed on an independent light source board and not on an MCU controller circuit board, so that a high-power LED light source is convenient to form.
The LED light source system is provided with an independent hardware stroboscopic circuit, is not controlled by an MCU (micro control unit) controller, has higher response speed, and realizes ns-level delay, so that when a detected material dynamically passes through a detection point, a camera triggers a signal, the LED light source can be lightened in real time, the camera is exposed in real time for imaging, high-efficiency detection is realized, and the real-time synchronism with the camera is better.
The camera stroboscopic module comprises a camera TRIG interface and a TRIG conversion circuit, and the camera TRIG interface is connected with the LED constant current circuit through the TRIG conversion circuit. Referring to fig. 5, the TRIG conversion circuit includes resistors R5-R10, a diode D2, and a transistor Q2, wherein a positive electrode of the diode D2 is connected to a resistor R7, and a negative electrode of the diode D2 is connected to a resistor R9, and the circuit components and the connection relationship thereof are shown in the figure. The other end of the resistor R9 is connected with the base electrode of the triode Q2, the resistor R10 is connected between the base electrode and the emitting electrode of the triode Q2 in parallel, the collector electrode of the triode Q2 is connected with the resistors R5, R6, R8 and the EN port of the LED constant current circuit in parallel, and the other ends of the resistors R5-R7 are connected with +12VDC voltage. The camera TRIG interface outputs a high-resistance state or a low level, and when the camera TRIG interface is in the high-resistance state, the LED constant-current circuit does not work; at low, transistor Q2 is inactive. The +12VDC voltage drives the LED constant current circuit through the resistors R5 and R6, so that the LED constant current circuit is guaranteed to normally work in real time, and synchronous real-time stroboflash with the camera is realized.
The LED light source working state monitoring circuit monitors the working state of the light source in real time, when the light source works for a plurality of times exceeding the exposure time of the camera, the MCU controller monitors an abnormal signal and sends a signal to the LED light source abnormal protection circuit, and an independent stroboscopic mode is adopted to forcibly realize stroboscopic of the LED light source at a fixed frequency and a duty ratio, so that the LED light source is prevented from overheating and works in a safe working area.
Referring to fig. 6, the LED light source abnormality protection circuit includes resistors R1-R4, a transistor Q1, a TVS transient suppression diode D1, and a capacitor C1, and the connection relationship of the circuit components is shown in the figure. One end of a resistor R2 is connected with a Con _1 pin of the MCU controller, the other end of the resistor R2 is connected with a base electrode of a triode Q1, a resistor R4 is connected in parallel between the base electrode and an emitter electrode of the triode Q1, a collector electrode of a diode Q1 is connected with an EN port of an LED constant current circuit and a resistor R1, the other end of a resistor R1 is connected in parallel with a resistor R3, a capacitor C1, a TVS transient suppression diode D1 and an AD2 pin of the MCU controller, a resistor R3 is connected in parallel with the capacitor C1 to form an RC filter circuit, and the other end of the TVS transient suppression diode D1 is connected with. The MCU controller detection port detects the voltage change of AD2, and when the LED constant current circuit work exceeded normal stroboscopic several times and was in abnormal working condition, AD2 was in the high level always, and the Con _1 pin output high level of MCU controller this moment forces to pull down LED constant current circuit port EN, pulls down Con _1 pin again after delaying a terminal time, lets LED constant current circuit normal work. If the camera stroboscopic circuit or the camera is triggered normally, the circuit does not participate in the action, and if the circuit is still in an abnormal state, the LED light source abnormal protection circuit performs cyclic protection to generate fixed frequency stroboscopic, so that the LED light source is prevented from overheating.
The LED light source system is provided with a power failure storage circuit, has a power failure storage function, and can recover to the last set parameter operation when the LED light source system is started again after being shut down. Meanwhile, the LED lamp is provided with a key circuit and a nixie tube display circuit, and can realize that each path of light source parameter is set on a manual interface so as to achieve the optimal light distribution effect. Therefore, the light source system is designed with two dimming modes, one mode is that each constant current source is adjusted by a communication module, namely, an MCU (micro control unit) in real time at 1024 levels, so that the LED light source is continuously adjustable; the other type is that the light can be adjusted by the key through the key circuit, so that the operation is fast and convenient.
The utility model discloses a DC voltage circuit and LED constant current circuit component LED constant current dimmer circuit have independent hardware stroboscopic circuit and parallel light source abnormal protection circuit, have realized not influencing under the condition of independent stroboscopic circuit work, realize the protection when the light source is unusual to guarantee the reliable work of light source.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. An LED light source system is characterized by mainly comprising an MCU controller, a constant current source connected with the MCU controller, an LED constant current dimming module, an LED light source abnormity protection circuit and an LED light source working state monitoring circuit;
the LED constant-current dimming module comprises a D/A conversion circuit, an analog signal processing circuit, a DC voltage circuit and an LED constant-current circuit which are sequentially connected, wherein the input end of the DC voltage circuit is connected with a constant current source, the output end of the DC voltage circuit is connected with an LED light source working state monitoring circuit, the output end of the LED constant-current circuit is connected with an LED light source and camera stroboscopic module, and the input end of the LED constant-current circuit is connected with an LED light source abnormity protection circuit.
2. The LED light source system of claim 1, wherein the DC voltage circuit comprises resistors R11-R14, capacitors C2-C6, diodes D3-D4, an inductor L1, and a voltage regulation chip U1, wherein the anode of the diode D3 is connected with a resistor R11, the cathode of the diode D3 is connected with the resistors R12-R14 and the 4 th pin of the voltage regulation chip U1 in parallel, the other end of the resistor R14 is connected with the capacitor C2, the other end of the resistor R11 is connected with the analog signal processing circuit, one end of the inductor L1 is connected with the cathode of the diode D4 and the voltage output port of the voltage regulation chip U1, the other end of the inductor L1 is connected with capacitors C2, C5, C6 and the dimming reference feedback port of the LED constant current dimming circuit, and the voltage input port of the voltage regulation chip U1 is connected with capacitors C3, C4 and.
3. The LED light source system of claim 1, wherein the constant current source comprises a DC/DC conversion circuit and a DC power input interface, wherein the input end of the DC/DC conversion circuit is connected with the MCU controller, and the output end of the DC/DC conversion circuit is connected with the DC power input interface.
4. The LED light source system as claimed in claim 1, wherein the camera strobe module comprises a camera TRIG interface and a TRIG conversion circuit, and the camera TRIG interface is connected to the LED constant current circuit through the TRIG conversion circuit.
5. The LED light source system of claim 4, wherein the TRIG conversion circuit comprises resistors R5-R10, a diode D2 and a transistor Q2, wherein the anode of the diode D2 is connected with a resistor R7, the cathode of the diode D2 is connected with a resistor R9, the other end of the resistor R9 is connected with the base of the transistor Q2, a resistor R10 is connected between the base and the emitter of the transistor Q2 in parallel, the collector of the transistor Q2 is connected with the resistors R5, R6, R8 and the EN port of the LED constant current circuit in parallel, and the other ends of the resistors R5-R7 are connected with +12VDC voltage.
6. The LED light source system of claim 1, wherein the LED light source abnormality protection circuit comprises a resistor R1-R4, a transistor Q1, a TVS transient suppression diode D1 and a capacitor C1, one end of the resistor R2 is connected with a Con _1 pin of the MCU controller, the other end of the resistor R2 is connected with a base of a transistor Q1, the resistor R4 is connected between a base and an emitter of the transistor Q1 in parallel, a collector of the diode Q1 is connected with an EN port of the LED constant current circuit and the resistor R1, the other end of the resistor R1 is connected with a resistor R3, a capacitor C1, a TVS transient suppression diode D1 and an AD2 pin of the MCU controller in parallel, the resistor R3 is connected with the capacitor C1 in parallel to form a filter circuit, and the other end of the TVS transient suppression diode D1 is connected with a + 3..
7. The LED light source system as claimed in claim 1, wherein the LED constant current circuit comprises a resistor R21, a constant current driving chip DD311, and a plurality of light emitting diodes, the 1 st pin of the constant current driving chip DD311 is connected with the resistor R21, the 2 nd pin is connected with the plurality of light emitting diodes in series, and the other end of the resistor R21 is connected with the voltage output pin V11 of the DC voltage circuit.
8. The LED light source system as claimed in any one of claims 1 to 7, further comprising a communication module, a key circuit, a power-down storage circuit, a nixie tube display module, and a work indicator connected to the MCU controller.
9. The LED light source system of claim 8, wherein the communication module employs a MAX232 serial communication circuit or an RS485 serial communication circuit.
10. The LED light source system according to any one of claims 1 to 7, mainly comprising an MCU controller, a plurality of LED light sources, a constant current source connected with the MCU controller, a multi-channel parallel LED constant current dimming module, an LED light source abnormity protection circuit and an LED light source working state monitoring circuit;
the LED constant-current dimming module comprises a D/A conversion circuit, an analog signal processing circuit, a DC voltage circuit and an LED constant-current circuit which are sequentially connected; the input end of the DC voltage circuit is connected with the constant current source, and the output end of the DC voltage circuit is connected with the LED light source working state monitoring circuit; the output end of the LED constant current circuit is connected with the LED light source and the camera stroboscopic module, and the input end of the LED constant current circuit is connected with the LED light source abnormity protection circuit;
the LED constant current circuits are connected in parallel, and the LED constant current circuits are connected with an LED light source.
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| CN201921665882.8U CN210670665U (en) | 2019-09-30 | 2019-09-30 | LED light source system |
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| CN201921665882.8U CN210670665U (en) | 2019-09-30 | 2019-09-30 | LED light source system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110662329A (en) * | 2019-09-30 | 2020-01-07 | 合肥市雅视智能科技有限公司 | LED light source system |
| CN115580782A (en) * | 2022-11-09 | 2023-01-06 | 合肥安迅精密技术有限公司 | Light source brightness control method and system for linear array camera illumination and storage medium |
-
2019
- 2019-09-30 CN CN201921665882.8U patent/CN210670665U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110662329A (en) * | 2019-09-30 | 2020-01-07 | 合肥市雅视智能科技有限公司 | LED light source system |
| CN115580782A (en) * | 2022-11-09 | 2023-01-06 | 合肥安迅精密技术有限公司 | Light source brightness control method and system for linear array camera illumination and storage medium |
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