CN216721623U - LED lamp control system - Google Patents
LED lamp control system Download PDFInfo
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- CN216721623U CN216721623U CN202123421490.7U CN202123421490U CN216721623U CN 216721623 U CN216721623 U CN 216721623U CN 202123421490 U CN202123421490 U CN 202123421490U CN 216721623 U CN216721623 U CN 216721623U
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Abstract
The utility model relates to the technical field of circuit control, and discloses an LED lamp control system, which comprises: the LED lamp comprises an MCU chip, a plurality of LED lamps, a brightness control unit and a plurality of sub-switch control units; the brightness control unit comprises a first triode and a second triode; the sub-switch control unit comprises a third triode; the PWM interface of the MCU chip outputs a brightness adjusting signal, and the brightness adjusting signal controls the first triode and the second triode to adjust the voltage signal input by the voltage input end and then output a brightness control signal for controlling the brightness of the LED lamps; when the IO interface of the MCU chip outputs a current signal and the current signal is amplified by the third triode corresponding to the sub-switch control signal, the corresponding LED lamp is lightened.
Description
Technical Field
The utility model relates to the technical field of circuit control, in particular to an LED lamp control system.
Background
In the design process of electronic products, more and more products use indicator lamps to display product functions, and the brightness of different external environment indicator lamps is also different, for example: the indicator light is a brightness level in the daytime, and the indicator light is another brightness level in the night, so that the indicator light needs to be dimmed.
At present, the general use of integrated processing chip is directly to adjust luminance to the pilot lamp with the PWM interface of MCU chip, LED lamp of a PWM interface control, there are several LED lamps on the product, it just needs several way PWM interfaces to correspond, however, the PWM interface of MCU chip is limited, PIC18F series's of Microchip PWM interface just only has 4 for example, not only the pilot lamp is adjusted luminance and is needed to use the PWM interface on a product, other some functions also need to use the PWM interface, the phenomenon that the PWM interface is not enough will appear at this moment.
At this time, the number of the PWM interfaces can be increased by simulating the PWM interfaces through software, but the method has higher requirements on the memory of the MCU chip, and the MCU chip with a larger memory is needed, but the larger the memory of the MCU chip is, the higher the cost is, and the difficulty and instability of software development are also increased, which results in the failure of the product function. The MCU with larger pin number and larger package can also be selected, the PWM interfaces of the MCU chip with more pins are more under the general condition, but under the same requirement, the cost pressure is too large when the MCU chip with large package is compared with the MCU chip with small package, and the enough PWM interfaces cannot be ensured; some series of MCU chips are consistent in the number of PWM interfaces regardless of the packaging size, and the development difficulty and the development time are increased by selecting other series of chips. In addition, a special LED driving chip may be used, but the cost pressure of one LED driving chip capable of driving more than 3 LED is also too large.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem of high cost and pressure of the existing LED control system and provides an LED lamp control system.
In order to achieve the above object, the present invention discloses an LED lamp control system, comprising: the LED lamp comprises an MCU chip, a plurality of LED lamps, a brightness control unit and a plurality of sub-switch control units;
the MCU chip comprises a PWM interface and a plurality of IO interfaces, the PWM interface is connected with the brightness control unit, the brightness control unit is connected with a plurality of LED lamps, each IO interface is respectively connected with one sub-switch control unit, and each sub-switch control unit is connected with at least one LED lamp;
the brightness control unit comprises a PWM signal input end, a brightness adjusting signal output end and an LED power supply input end, the PWM signal input end of the brightness control unit is respectively connected with the PWM interface of the MCU chip, and the brightness adjusting signal output end is connected with the LED lamps;
the input end of the sub-switch control unit is connected with the IO interface of the MCU chip, and the output end of the sub-switch control unit is connected with at least one LED lamp;
when the PWM interface of the MCU chip outputs a PWM signal, the brightness control unit adjusts a voltage signal input by the LED power input end according to the PWM signal to generate a brightness adjusting signal of the LED lamp, and the brightness adjusting signal is used as the LED power signal of the LED power input end and is used for controlling the brightness of a plurality of LED lamps;
when the IO interface of the MCU chip outputs a control signal, the sub-switch control unit controls the corresponding at least one LED lamp to be turned on or turned off according to the control signal.
As an implementation manner, the brightness control unit includes a first triode and a second triode, a base of the first triode is connected to the PWM signal input terminal of the brightness control unit, an emitter of the first triode is connected to a ground terminal, a collector of the first triode is connected to a base of the second triode, a collector of the second triode is connected to the brightness adjustment signal output terminal, and an emitter of the second triode is connected to the LED power input terminal.
As an implementation manner, the sub-switch control unit includes a third transistor, an input terminal of the sub-switch control unit is connected to a base of the third transistor, an emitter of the third transistor is connected to a ground terminal, and a collector of the third transistor is connected to an output terminal of the sub-switch control unit.
As an implementation manner, the connection of the collector of the second triode to the brightness adjustment signal output terminal specifically includes: and the emitter of the second triode is connected with one end of a first resistor, and the other end of the first resistor is connected with the brightness adjusting signal output end.
Correspondingly, the utility model also discloses an LED lamp control system, which comprises: the LED lamp comprises an MCU chip, a plurality of LED lamps, at least two brightness control units and a plurality of sub-switch control units;
the MCU chip comprises at least two PWM interfaces and a plurality of IO interfaces, each PWM interface is respectively connected with one brightness control unit, each brightness control unit is respectively connected with at least one LED lamp, each IO interface is respectively connected with one sub-switch control unit, and each sub-switch control unit is connected with at least one LED lamp;
the brightness control unit comprises a PWM signal input end, a brightness adjusting signal output end and an LED power supply input end, the PWM signal input end of the brightness control unit is respectively connected with the PWM interface of the MCU chip, and the brightness adjusting signal output end is connected with at least one LED lamp;
the input end of the sub-switch control unit is connected with the IO interface of the MCU chip, and the output end of the sub-switch control unit is connected with at least one LED lamp;
when the PWM interface of the MCU chip outputs a PWM signal, the brightness control unit adjusts a voltage signal input by the LED power input end according to the PWM signal to generate a brightness adjusting signal of the LED lamp, and the brightness adjusting signal is used as the LED power signal of the LED power input end and is used for controlling the brightness of at least one corresponding LED lamp;
when the IO interface of the MCU chip outputs a control signal, the control signal controls the corresponding at least one LED lamp to be turned on or off by controlling the corresponding sub-switch control unit.
As an implementation manner, the brightness control unit includes a first triode and a second triode, a base of the first triode is connected to the PWM signal input terminal of the brightness control unit, an emitter of the first triode is connected to a ground terminal, a collector of the first triode is connected to a base of the second triode, a collector of the second triode is connected to the brightness adjustment signal output terminal, and an emitter of the second triode is connected to the LED power input terminal.
As an implementation manner, the sub-switch control unit includes a third transistor, an input terminal of the sub-switch control unit is connected to a base of the third transistor, an emitter of the third transistor is connected to a ground terminal, and a collector of the third transistor is connected to an output terminal of the sub-switch control unit.
As an implementation manner, the connection of the collector of the second triode to the brightness adjustment signal output terminal specifically includes: and the emitter of the second triode is connected with one end of a first resistor, and the other end of the first resistor is connected with the brightness adjusting signal output end.
The utility model has the beneficial effects that: the brightness control unit is controlled by the PWM control signal sent by one PWM interface of the MCU to adjust the intensity of the voltage signal input by the LED power supply input end, so that the brightness of a plurality of LED lamps is controlled, and then the on-off of the corresponding LED lamps is respectively controlled by the control signals sent by a plurality of IO interfaces of the MCU; therefore, the dimming function can be realized, and the indicator lamp to be lightened can be lightened according to the actual requirement; the cost is reduced, and the method has good application value in the fields of industry, airplanes, ships and the like.
Drawings
Fig. 1 is a schematic structural diagram of a brightness adjusting unit of an LED lamp control system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a plurality of sub-switch control units of an LED lamp control system according to an embodiment of the present invention.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present embodiment provides a technical solution: an LED lamp control system comprising: the LED lamp comprises an MCU chip, a plurality of LED lamps, a brightness control unit and a plurality of sub-switch control units;
the MCU chip comprises a PWM interface and a plurality of IO interfaces, the PWM interface is connected with the brightness control unit, the brightness control unit is connected with a plurality of LED lamps, each IO interface is respectively connected with one sub-switch control unit, and each sub-switch control unit is connected with at least one LED lamp;
the brightness control unit comprises a PWM signal input end, a brightness adjusting signal output end and an LED power supply input end, the PWM signal input end of the brightness control unit is respectively connected with the PWM interface of the MCU chip, and the brightness adjusting signal output end is connected with the LED lamps;
the input end of the sub-switch control unit is connected with the IO interface of the MCU chip, and the output end of the sub-switch control unit is connected with at least one LED lamp;
when the PWM interface of the MCU chip outputs a PWM signal, the brightness control unit adjusts a voltage signal input by the LED power input end according to the PWM signal to generate a brightness adjusting signal of the LED lamp, and the brightness adjusting signal is used as the LED power signal of the LED power input end and is used for controlling the brightness of a plurality of LED lamps;
when the IO interface of the MCU chip outputs a control signal, the sub-switch control unit controls the corresponding at least one LED lamp to be turned on or turned off according to the control signal.
The brightness control unit comprises a first triode and a second triode, the base electrode of the first triode is connected with the PWM signal input end of the brightness control unit, the emitting electrode of the first triode is connected with the grounding end, the collecting electrode of the first triode is connected with the base electrode of the second triode, the collecting electrode of the second triode is connected with the brightness adjusting signal output end, and the emitting electrode of the second triode is connected with the LED power supply input end.
The sub-switch control unit comprises a third triode, the input end of the sub-switch control unit is connected with the base electrode of the third triode, the emitting electrode of the third triode is connected with the grounding end, and the collecting electrode of the third triode is connected with the output end of the sub-switch control unit.
The connection of the collector of the second triode to the brightness adjustment signal output terminal specifically includes: the emitter of the second triode is connected with one end of a first resistor, and the other end of the first resistor is connected with the brightness adjusting signal output end
And the voltage signal input by the LED power supply input end is 12V.
In this embodiment, the brightness control unit corresponds to one PWM interface and a plurality of LED lamps, and the plurality of sub-switch control units correspond to one IO interface and one LED lamp, respectively; in this embodiment, brightness adjustment of all the LED lamps can be achieved only by connecting one PWM interface to one brightness control unit, and in addition, lighting and extinguishing of the corresponding LED lamp are achieved by corresponding to one LED lamp through one IO interface.
As shown in fig. 1, a PWM interface of the MCU is connected to the base of the first transistor Q1, the first transistor Q1 is connected to the ground GND, the collector of the first transistor Q1 is connected to the base of the second transistor Q2, the emitter of the second transistor Q2 is connected to a voltage input terminal, wherein the voltage input terminal has a voltage of 12V, the collector of the second transistor Q2 is connected to a plurality of LED lamps, the PWM interface outputs a voltage adjustment signal to the base of the first transistor Q1, the voltage signal input by the voltage input terminal is modulated by the first transistor Q1 and the second transistor Q2, the collector of the second transistor Q2 outputs a brightness control signal LED POWER, which reaches the plurality of LED lamps through a plurality of resistors as shown in fig. 2, so as to adjust the brightness of the plurality of LED lamps, specifically, the brightness of the first LED lamp D1, the second LED lamp D2, the third LED lamp D3, … … and the nth LED lamp DN is controlled by reaching the first LED lamp D1 through the first resistor R1, reaching the second LED lamp D2 through the second resistor R2, reaching the third LED lamp D3, … … through the third resistor R3 and reaching the nth LED lamp DN through the nth resistor RN.
As shown in fig. 2, the plurality of IO interfaces of the MCU chip respectively correspond to the plurality of third transistors, specifically, a first IO interface IO1 of the MCU chip is connected to a base of a first third transistor Q31, an emitter of the first third transistor Q31 is connected to a ground GND, and a collector of the first third transistor Q31 is connected to a first LED lamp D1; a second IO interface IO2 of the MCU chip is connected to a base of a second third triode Q32, an emitter of the second third triode Q32 is connected to a ground GND, and a collector of the second third triode Q32 is connected to a second LED lamp D2; a third IO interface IO3 of the MCU chip is connected to a base of a third triode Q33, an emitter of the third triode Q33 is connected to a ground GND, and a collector of the third triode Q33 is connected to a third LED lamp D3; … …, respectively; the base of the Nth third triode Q3N is connected to the Nth IO interface ION of the MCU chip, the grounded terminal GND is connected to the emitting electrode of the Nth third triode Q3N, and the Nth LED lamp DN is connected to the collecting electrode of the Nth third triode Q3N.
The intensity of a voltage signal input by a voltage input end is controlled through a PWM interface of the MCU, so that the brightness of a plurality of LED lamps is simultaneously controlled according to a brightness control signal obtained after adjustment, and then the on-off of a plurality of LEDs is controlled through a plurality of IO interfaces of the MCU respectively; therefore, the dimming function can be realized, and the indicator lamp to be lightened can be lightened according to the actual requirement; on the basis of not influencing the product function, the problem of increasing the design cost is solved from the control logic, the cost is reduced, and the method has good application value in the fields of industry, airplanes, ships and the like.
Correspondingly, this embodiment has still disclosed a LED lamp control system, includes: the LED lamp comprises an MCU chip, a plurality of LED lamps, at least two brightness control units and a plurality of sub-switch control units;
the MCU chip comprises at least two PWM interfaces and a plurality of IO interfaces, each PWM interface is respectively connected with one brightness control unit, each brightness control unit is respectively connected with at least one LED lamp, each IO interface is respectively connected with one sub-switch control unit, and each sub-switch control unit is connected with at least one LED lamp;
the brightness control unit comprises a PWM signal input end, a brightness adjusting signal output end and an LED power supply input end, the PWM signal input end of the brightness control unit is respectively connected with the PWM interface of the MCU chip, and the brightness adjusting signal output end is connected with at least one LED lamp;
the input end of the sub-switch control unit is connected with the IO interface of the MCU chip, and the output end of the sub-switch control unit is connected with at least one LED lamp;
when the PWM interface of the MCU chip outputs a PWM signal, the brightness control unit adjusts a voltage signal input by the LED power input end according to the PWM signal to generate a brightness adjusting signal of the LED lamp, and the brightness adjusting signal is used as the LED power signal of the LED power input end and is used for controlling the brightness of at least one corresponding LED lamp;
when the IO interface of the MCU chip outputs a control signal, the control signal controls the corresponding at least one LED lamp to be turned on or off by controlling the corresponding sub-switch control unit.
The brightness control unit comprises a first triode and a second triode, the base electrode of the first triode is connected with the PWM signal input end of the brightness control unit, the emitting electrode of the first triode is connected with the grounding end, the collecting electrode of the first triode is connected with the base electrode of the second triode, the collecting electrode of the second triode is connected with the brightness adjusting signal output end, and the emitting electrode of the second triode is connected with the LED power supply input end.
The sub-switch control unit comprises a third triode, the input end of the sub-switch control unit is connected with the base electrode of the third triode, the emitting electrode of the third triode is connected with the grounding end, and the collecting electrode of the third triode is connected with the output end of the sub-switch control unit.
The connection of the collector of the second triode to the brightness adjustment signal output terminal specifically includes: and the emitter of the second triode is connected with one end of a first resistor, and the other end of the first resistor is connected with the brightness adjusting signal output end.
And the voltage signal input by the LED power supply input end is 12V.
In this embodiment, through setting up luminance the control unit more than two and connect corresponding PWM interface respectively, can realize different luminance control to different LED lamps respectively through different PWM interfaces and the luminance the control unit that corresponds, use more nimble.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (8)
1. An LED lamp control system, comprising: the LED lamp comprises an MCU chip, a plurality of LED lamps, a brightness control unit and a plurality of sub-switch control units;
the MCU chip comprises a PWM interface and a plurality of IO interfaces, the PWM interface is connected with the brightness control unit, the brightness control unit is connected with a plurality of LED lamps, each IO interface is respectively connected with one sub-switch control unit, and each sub-switch control unit is connected with at least one LED lamp;
the brightness control unit comprises a PWM signal input end, a brightness adjusting signal output end and an LED power supply input end, the PWM signal input end of the brightness control unit is respectively connected with the PWM interface of the MCU chip, and the brightness adjusting signal output end is connected with the LED lamps;
the input end of the sub-switch control unit is connected with the IO interface of the MCU chip, and the output end of the sub-switch control unit is connected with at least one LED lamp;
when the PWM interface of the MCU chip outputs a PWM signal, the brightness control unit adjusts a voltage signal input by the LED power input end according to the PWM signal to generate a brightness adjusting signal of the LED lamp, and the brightness adjusting signal is used as the LED power signal of the LED power input end and is used for controlling the brightness of a plurality of LED lamps;
when the IO interface of the MCU chip outputs a control signal, the sub-switch control unit controls the corresponding at least one LED lamp to be turned on or turned off according to the control signal.
2. The LED lamp control system according to claim 1, wherein the brightness control unit comprises a first transistor and a second transistor, a base of the first transistor is connected to the PWM signal input terminal of the brightness control unit, an emitter of the first transistor is connected to a ground terminal, a collector of the first transistor is connected to a base of the second transistor, a collector of the second transistor is connected to the brightness adjustment signal output terminal, and an emitter of the second transistor is connected to the LED power input terminal.
3. The LED lamp control system according to claim 1, wherein the sub-switch control unit comprises a third triode, an input terminal of the sub-switch control unit is connected to a base of the third triode, an emitter of the third triode is connected to a ground terminal, and a collector of the third triode is connected to an output terminal of the sub-switch control unit.
4. The LED lamp control system according to claim 2, wherein the connection of the collector of the second triode to the output of the brightness adjustment signal specifically comprises: and the emitting electrode of the second triode is connected with one end of a first resistor, and the other end of the first resistor is connected with the brightness adjusting signal output end.
5. An LED lamp control system, comprising: the LED lamp comprises an MCU chip, a plurality of LED lamps, at least two brightness control units and a plurality of sub-switch control units;
the MCU chip comprises at least two PWM interfaces and a plurality of IO interfaces, each PWM interface is respectively connected with one brightness control unit, each brightness control unit is respectively connected with at least one LED lamp, each IO interface is respectively connected with one sub-switch control unit, and each sub-switch control unit is connected with at least one LED lamp;
the brightness control unit comprises a PWM signal input end, a brightness adjusting signal output end and an LED power supply input end, the PWM signal input end of the brightness control unit is respectively connected with the PWM interface of the MCU chip, and the brightness adjusting signal output end is connected with at least one LED lamp;
the input end of the sub-switch control unit is connected with the IO interface of the MCU chip, and the output end of the sub-switch control unit is connected with at least one LED lamp;
when the PWM interface of the MCU chip outputs a PWM signal, the brightness control unit adjusts a voltage signal input by the LED power input end according to the PWM signal to generate a brightness adjusting signal of the LED lamp, and the brightness adjusting signal is used as the LED power signal of the LED power input end and is used for controlling the brightness of at least one corresponding LED lamp;
when the IO interface of the MCU chip outputs a control signal, the control signal controls the corresponding at least one LED lamp to be turned on or off by controlling the corresponding sub-switch control unit.
6. The LED lamp control system according to claim 5, wherein the brightness control unit comprises a first triode and a second triode, a base of the first triode is connected to the PWM signal input terminal of the brightness control unit, an emitter of the first triode is connected to a ground terminal, a collector of the first triode is connected to a base of the second triode, a collector of the second triode is connected to the brightness adjustment signal output terminal, and an emitter of the second triode is connected to the LED power input terminal.
7. The LED lamp control system according to claim 5, wherein the sub-switch control unit comprises a third triode, an input terminal of the sub-switch control unit is connected to a base of the third triode, an emitter of the third triode is connected to a ground terminal, and a collector of the third triode is connected to an output terminal of the sub-switch control unit.
8. The LED lamp control system according to claim 6, wherein the connection of the collector of the second triode to the output of the brightness adjustment signal specifically comprises: and the emitter of the second triode is connected with one end of a first resistor, and the other end of the first resistor is connected with the brightness adjusting signal output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123421490.7U CN216721623U (en) | 2021-12-31 | 2021-12-31 | LED lamp control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123421490.7U CN216721623U (en) | 2021-12-31 | 2021-12-31 | LED lamp control system |
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| Publication Number | Publication Date |
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| CN216721623U true CN216721623U (en) | 2022-06-10 |
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| CN202123421490.7U Active CN216721623U (en) | 2021-12-31 | 2021-12-31 | LED lamp control system |
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| CN (1) | CN216721623U (en) |
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2021
- 2021-12-31 CN CN202123421490.7U patent/CN216721623U/en active Active
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