CN215935132U - Digital LED light source controller - Google Patents
Digital LED light source controller Download PDFInfo
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- CN215935132U CN215935132U CN202023260638.9U CN202023260638U CN215935132U CN 215935132 U CN215935132 U CN 215935132U CN 202023260638 U CN202023260638 U CN 202023260638U CN 215935132 U CN215935132 U CN 215935132U
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Abstract
The utility model discloses a digital LED light source controller, which comprises a control system and a camera triggering system, wherein the control system comprises a digital signal control module, a digital-to-analog conversion module and an operational amplification module, the digital signal control module converts a digital light intensity signal into an analog voltage signal through the digital-to-analog conversion module, and the analog voltage signal is subjected to operational amplification through the operational amplification module and used for controlling the current for lighting an LED light source; the camera trigger system is connected with the digital signal control module. The control system of the utility model adopts the digital signal control module, the digital-to-analog conversion module and the operational amplification module to realize the accurate control of the LED current, and the camera trigger system is added to be connected with the digital signal control module to realize the accurate synchronization of the light source control signal and the camera trigger signal.
Description
Technical Field
The utility model relates to the technical field of control devices, in particular to a digital LED light source controller.
Background
The digital light source controller may also be called a programmable light source controller, that is, the light source program of the controller may be modified according to the needs of the user, such as modifying the speed, time, mode, synchronous and asynchronous of the light source flashing, and the like. At present, most of like products on the market are traditional light source controllers, the traditional light source controllers are controlled by analog voltage, the accuracy is low, only light source control is provided under most conditions, a camera trigger function is omitted, the functions are few, and the use limitation is large.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, the present invention provides a digital LED light source controller, including:
the control system comprises a digital signal control module, a digital-to-analog conversion module and an operational amplification module, wherein the digital signal control module converts a digital light intensity signal into an analog voltage signal through the digital-to-analog conversion module, and the analog voltage signal is subjected to operational amplification through the operational amplification module and used for controlling the current for lighting the LED light source;
and the camera triggering system is connected with the digital signal control module.
By adopting the technical scheme, the control system comprises a communication module, the communication module comprises a first communication unit and a second communication unit, and the first communication unit and the second communication unit are connected with the digital signal control module.
According to the technical scheme, the digital signal control module comprises a digital signal controller and a switch, the switch is arranged at the output end of the digital-to-analog conversion module, and the switch is connected with the digital signal controller.
By adopting the technical scheme, the switch is a single-pole single-throw switch.
According to the technical scheme, the operational amplification module comprises an operational amplifier, a field effect transistor and a negative feedback circuit, the operational amplifier is connected with the field effect transistor, and the negative feedback circuit is connected with the operational amplifier.
According to the technical scheme, the digital-to-analog conversion module comprises a voltage division circuit, and the voltage division circuit is connected with the output end of the digital-to-analog conversion module.
According to the technical scheme, the camera triggering system comprises the camera internal triggering module and the camera external triggering module, and the camera internal triggering module and the camera external triggering module are both connected with the digital signal controller.
According to the technical scheme, the camera internal triggering module comprises a first optical coupler, the first optical coupler is connected with the digital signal controller, and an output signal of the digital signal controller triggers the first optical coupler.
By adopting the technical scheme, the camera external trigger module comprises a second optical coupler, the second optical coupler is connected with the digital signal controller, and the digital signal controller receives a trigger signal from the second optical coupler.
According to the technical scheme, the camera internal triggering module and the camera external triggering module both comprise a multi-channel triggering unit.
Compared with the prior art, the control system provided by the utility model adopts the digital signal control module, the digital-to-analog conversion module and the operational amplification module to realize the accurate control of the LED current, and the camera trigger system is additionally arranged to be connected with the digital signal control module to realize the accurate synchronization of the light source control signal and the camera trigger signal.
Drawings
FIG. 1 is a circuit schematic of the control system of the present invention.
Fig. 2 is a circuit schematic of the camera internal trigger module of the present invention.
Fig. 3 is a circuit schematic of the camera external trigger module of the present invention.
The reference numbers in the figures illustrate: 11. a digital signal control module; 111. a digital signal controller; 12. a digital-to-analog conversion module; 121. a voltage dividing circuit; 13. an operational amplification module; 141. a first communication unit; 142. a second communication unit; 21. a camera internal trigger module; 22. a camera external trigger module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
Referring to fig. 1 to 3, an embodiment of the present invention provides a digital LED light source controller, which includes a control system and a camera trigger system, and is configured to implement accurate synchronization between a light source control signal and a camera trigger signal.
The control system comprises a digital signal control module 11, a digital-to-analog conversion module 12 and an operational amplification module 13, wherein the digital signal control module 11 converts a digital light intensity signal into an analog voltage signal through the digital-to-analog conversion module 12, and the analog voltage signal is subjected to operational amplification through the operational amplification module 13 and used for controlling the current for lighting the LED light source.
Specifically, the digital signal control module 11 includes a digital signal controller 111 and a switch, preferably, the switch is a single-pole single-throw switch, the digital signal controller 111 is connected to the single-pole single-throw switch, the single-pole single-throw switch is disposed at an output end of the digital-to-analog conversion module 12, the digital-to-analog conversion module 12 includes a digital-to-analog converter and a voltage dividing circuit 121, an output end of the digital-to-analog converter is connected to the voltage dividing circuit 121, and the voltage dividing circuit 121 is composed of a resistor R1 and a resistor R2; the operational amplification module 13 comprises an operational amplifier, a field effect transistor and a negative feedback circuit, wherein the operational amplifier is connected with the grid electrode of the field effect transistor, the positive electrode of the operational amplifier is connected with the single-pole single-throw switch, the negative electrode of the operational amplifier is connected with the negative feedback circuit, and the negative feedback circuit consists of a resistor R4 and a resistor R5; the drain electrode of the field effect tube is connected with the LED light source, and the source electrode of the field effect tube is grounded.
The control system further comprises a communication module, the communication module comprises a first communication unit 141 and a second communication unit 142, and the first communication unit 141 and the second communication unit 142 are connected with the digital signal controller 111, so that the dual communication mode is realized.
Further, the Digital Signal Controller 111 employs a dsPIC33EP series by Microchip Digital Signal Controller; the first communication unit 141 realizes serial port communication by adopting a MAX3232 chip, and the second communication unit 142 realizes network port communication by adopting an ENC28J60 chip; the digital-to-analog converter (DAC) is a micro-core MCP4922 series chip with 12-bit precision; a single pole single throw switch (SPST) employs an ADG613 chip from Analog Devices; an operational amplifier (OP AMP) adopts an MC33204 series chip of an ON Semiconductor; the thyristor was a metal-oxide semiconductor field effect transistor (HEXFET MOSFET) of channel type, N-type channel (NMOSFET) from International Rectifier Company.
The digital signal controller 111 of the utility model adopts an embedded real-time operating system (FreeRTOS) to execute a command sent by an upper computer through a serial port or a network port, when receiving a light intensity command, the digital signal controller 111 converts a digital light intensity signal (0-255) into an analog voltage signal Vout through a digital-to-analog converter, after voltage division (a resistor R1 and a resistor R2 form a voltage division circuit 121), a single-pole single-throw switch (SPST) controlled (SW signals) by the digital signal controller 111 is input to the anode of an operational amplifier (OP AMP). The output signal of the operational amplifier is sent to the grid of the field effect transistor to control the field effect transistor, and a negative feedback circuit consisting of a resistor R4 and a resistor R5 returns to the negative electrode of the operational amplifier and is used for accurately controlling the drain current ID, namely the current for lighting the LED light source, so that the light intensity of the light source is accurately controlled.
In addition, the camera triggering system includes a camera internal triggering module 21 and a camera external triggering module 22, and both the camera internal triggering module 21 and the camera external triggering module 22 are connected to the digital signal controller 111.
Specifically, the camera internal trigger module 21 includes a first optical coupler, the first optical coupler is connected to the digital signal controller 111, an output signal of the digital signal controller 111 triggers the first optical coupler, when a camera trigger command sent by an upper computer is received, the digital signal controller 111 outputs a signal to trigger the first optical coupler (EL817), and an output end of the first optical coupler (EL817) is used as a camera trigger signal input, so that the digital signal controller 111 is isolated from the camera, and trigger stability and reliability are ensured.
Also, the camera external trigger module 22 includes a second optical coupler connected to the digital signal controller 111, and the digital signal controller 111 receives the trigger signal from the second optical coupler ((EL817)) to match the trigger signal inside the digital signal controller 111.
The camera internal trigger module 21 and the camera external trigger module 22 each include a multi-channel trigger unit. Preferably, the camera internal trigger module 21 and the camera external trigger module 22 each include 8 trigger units, and any combination of the light source and the camera can be edited to realize accurate synchronization of the light source control signal and the camera trigger signal.
Compared with the prior art, the control system provided by the utility model adopts the digital signal control module 11, the digital-to-analog conversion module 12 and the operational amplification module 13 to realize the accurate control of the LED current, and the camera trigger system is additionally arranged to be connected with the digital signal control module 11 to realize the accurate synchronization of the light source control signal and the camera trigger signal.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the utility model is all within the protection scope of the utility model. The protection scope of the utility model is subject to the claims.
Claims (8)
1. A digital LED light source controller, comprising:
the control system comprises a digital signal control module, a digital-to-analog conversion module and an operational amplification module, wherein the digital signal control module converts a digital light intensity signal into an analog voltage signal through the digital-to-analog conversion module, and the analog voltage signal is subjected to operational amplification through the operational amplification module and used for controlling the current for lighting the LED light source;
the camera triggering system is connected with the digital signal control module;
the operational amplification module comprises an operational amplifier, a field effect transistor and a negative feedback circuit, wherein the operational amplifier is connected with the field effect transistor, and the negative feedback circuit is connected with the operational amplifier;
the digital-to-analog conversion module comprises a voltage division circuit, and the voltage division circuit is connected with the output end of the digital-to-analog conversion module.
2. The digital LED light source controller of claim 1, wherein: the control system comprises a communication module, wherein the communication module comprises a first communication unit and a second communication unit, and the first communication unit and the second communication unit are connected with the digital signal control module.
3. The digital LED light source controller of claim 2, wherein: the digital signal control module comprises a digital signal controller and a switch, the switch is arranged at the output end of the digital-to-analog conversion module, and the switch is connected with the digital signal controller.
4. A digital LED light source controller as claimed in claim 3 wherein: the switch is a single pole single throw switch.
5. The digital LED light source controller of claim 1, wherein: the camera triggering system comprises a camera internal triggering module and a camera external triggering module, wherein the camera internal triggering module and the camera external triggering module are both connected with the digital signal controller.
6. The digital LED light source controller of claim 5, wherein: the camera internal triggering module comprises a first optical coupler, the first optical coupler is connected with the digital signal controller, and an output signal of the digital signal controller triggers the first optical coupler.
7. The digital LED light source controller of claim 5, wherein: the camera external trigger module comprises a second optical coupler, the second optical coupler is connected with the digital signal controller, and the digital signal controller receives a trigger signal from the second optical coupler.
8. The digital LED light source controller of claim 5, wherein: the camera internal trigger module and the camera external trigger module both comprise a multi-channel trigger unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023260638.9U CN215935132U (en) | 2020-12-29 | 2020-12-29 | Digital LED light source controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023260638.9U CN215935132U (en) | 2020-12-29 | 2020-12-29 | Digital LED light source controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215935132U true CN215935132U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023260638.9U Active CN215935132U (en) | 2020-12-29 | 2020-12-29 | Digital LED light source controller |
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|---|---|
| CN (1) | CN215935132U (en) |
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2020
- 2020-12-29 CN CN202023260638.9U patent/CN215935132U/en active Active
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