CN216600138U

CN216600138U - LED drive circuit compatible with induction control and communication control

Info

Publication number: CN216600138U
Application number: CN202122460350.4U
Authority: CN
Inventors: 顾永波; 蒲纪忠; 甘彩英; 赵艺佼
Original assignee: CH Lighting Technology Co Ltd
Current assignee: CH Lighting Technology Co Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-05-24
Anticipated expiration: 2031-10-12

Abstract

The application discloses an LED driving circuit compatible with induction control and communication control, which comprises a rectifying and filtering module, a power conversion module, a communication module and an induction module, wherein the induction module is used for detecting object motion in the environment and outputting a corresponding induction signal according to the object motion; the communication module is used for receiving the induction signal and an external dimming signal and outputting a PWM signal in equal proportion according to the dimming signal or the induction signal; the PWM signal is used for adjusting the output power of the power conversion module. This application is through mutually supporting of response module and communication module for LED drive circuit has communication control function and response simultaneously and detects control function, has realized the light modulation of multiple mode.

Description

LED drive circuit compatible with induction control and communication control

Technical Field

The application relates to the technical field of lighting, in particular to an LED driving circuit compatible with induction control and communication control.

Background

In the prior art, the induction module is used for detecting the movement of an object so as to control the LED to be turned on or off, and the adjustment mode is single.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an LED driving circuit compatible with inductive control and communication control.

The application provides an LED driving circuit compatible with induction control and communication control, which comprises a rectifying and filtering module, a power conversion module, a communication module and an induction module,

the sensing module is used for detecting the motion of an object in the environment and outputting a corresponding sensing signal according to the motion of the object;

the communication module is used for receiving the induction signal and an external dimming signal and outputting a PWM signal in an equal proportion according to the dimming signal or the induction signal;

the PWM signal is used for adjusting the output power of the power conversion module.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the communication module includes a communication chip with a communication power supply terminal, a communication input terminal, a communication output terminal, and a parameter adjustment terminal, and a peripheral circuit thereof, wherein:

a communication input for receiving the sensing signal;

a communication output terminal for outputting the PWM signal;

and the parameter adjusting end is used for outputting a parameter adjusting signal, and the parameter adjusting signal is used for adjusting the induction signal.

Optionally, the sensing module includes a sensing chip with a sensing power supply terminal, a sensing input terminal and a sensing output terminal, and a peripheral circuit thereof, wherein:

the induction output end is coupled with the communication input end and used for outputting the induction signal;

the sensing input end is coupled with the parameter adjusting end and used for receiving a parameter adjusting signal;

the sensing module adjusts the holding time and the size of the sensing signal and the detection distance of the sensing module according to the parameter adjusting signal.

Optionally, a first resistor is coupled between the communication input terminal and the sensing output terminal.

Optionally, a second resistor and a third resistor connected in series are coupled between the parameter adjusting terminal and the sensing input terminal.

Optionally, the rectification filter module is coupled to the induction power supply terminal and the communication power supply terminal at the same time.

Optionally, the sensing module is a radar sensing module, and the communication module is a bluetooth communication module.

Optionally, the rectification filter module, the power conversion module and the LED lamp bead are coupled in sequence, the power conversion module includes a dimming chip with a dimming signal input terminal and a peripheral circuit thereof, and the dimming signal input terminal is configured to receive the PWM signal to implement power conversion.

Optionally, a constant voltage driving module is coupled between the rectifying and filtering module and the power conversion module, and the constant voltage driving module includes:

the constant voltage input end is coupled with the rectifying and filtering unit;

a constant voltage output coupled to the inductive power supply, the communication power supply, and the power conversion module.

Optionally, a voltage reduction and stabilization module is coupled between the constant voltage output terminal and the communication power supply terminal.

The LED drive circuit compatible with induction control and communication control at least has the following technical effects:

this application is through mutually supporting of response module and communication module for LED drive circuit has communication control function and response simultaneously and detects control function, has realized the light modulation of multiple mode.

Drawings

Fig. 1 is a schematic diagram of a module structure of an LED driving circuit according to an embodiment of the present disclosure;

FIG. 2 is a schematic circuit diagram of an embodiment of the sensing module and the communication module;

FIG. 3 is a schematic circuit diagram of a rectifying and filtering module and a power conversion module according to an embodiment of the present disclosure;

FIG. 4 is a schematic circuit diagram of a constant voltage driving module according to an embodiment of the present invention;

the reference numerals in the figures are illustrated as follows:

10. a rectification filtering module; 20. a power conversion module; 30. LED lamp beads; 40. a communication module; 50. a sensing module; r11, a first resistor; r13, a second resistor; r1, third resistor 4.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

It is noted that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any particular order or number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such system or apparatus.

Referring to fig. 1, an embodiment of the present application provides an LED driving circuit compatible with sensing control and communication control, including a rectifying and filtering module 10, a power conversion module 20, a communication module 40, and a sensing module 50, where the sensing module 50 is configured to detect object motion in an environment and output a corresponding sensing signal according to the object motion; the communication module 40 is configured to receive the sensing signal and an external dimming signal, and output a PWM signal in an equal proportion according to the dimming signal or the sensing signal; the PWM signal is used to regulate the output power of the power conversion module 20.

The following embodiments are explained and defined with respect to the rectifying-filtering module 10 and the power conversion module 20. Object movement includes movement of inanimate objects and animate objects, such as object movement and human body movement. The dimming signal is a first type of wireless communication signal sent by the bluetooth communication device, and may be, for example, a bluetooth communication signal or a zigbee communication signal. The first type of wireless communication signal (dimming signal) is used for adjusting the magnitude of the PWM signal, the first type of wireless communication signal and the PWM signal are in an equal proportional relationship, the power conversion module 20 is coupled with the LED lamp bead 30, and the PWM signal is used for adjusting the output power of the power conversion module 20, that is, adjusting the lighting time and the brightness of the LED lamp bead 30. The sensing signal is emitted from the sensing module 50, and since the sensing module 50 can only detect the movement of the object, although the communication module 40 can also output the PWM signal in an equal proportion according to the sensing signal, the sensing module 50 itself can only adjust the duration of the PWM signal and cannot adjust the magnitude of the PWM signal. It can be understood that the sensing signal can be used to determine whether the LED lamp bead 30 is lit, and the duration after lighting. Further, the communication module 40 is a bluetooth communication module, and the sensing module 50 is a radar sensing module. The bluetooth communication module is built in an external device, and an external dimming signal is for circuit connection, for example, the dimming signal is output by the bluetooth communication module of the external device, and the external device may be a mobile phone, for example. In the embodiment, by combining the sensing module 50 (microwave module) and the communication module 40, the LED driving circuit has a communication control function and a sensing detection control function at the same time, and the adjustment mode of the LED driving circuit is enriched.

To reveal the functionality of the communication module 40 and the sensing module 50, referring to fig. 2, in one embodiment, the electrical connection relationship between the two is explained. The communication module 40 comprises a communication chip M1 and peripheral circuits thereof, wherein the communication chip M1 is provided with a communication power supply end (pin 1), a communication input end (pin 5 TL-D2), a communication output end (pin 14 TL-B5) and a parameter adjusting end (pin 2 Tl-C4). Wherein: the communication input end (pin 5) is used for receiving the induction signal, the communication output end (pin 14) is used for outputting the PWM signal, and the parameter adjusting end (pin 2) is used for outputting the parameter adjusting signal.

The sensing module 50 includes a sensing chip M2 and its peripheral circuits, the sensing chip M2 has a sensing power supply terminal (pin 1 VDD), a sensing input terminal (pin 5 RX), and a sensing output terminal (pin 3, OUT). The sensing output terminal (pin 3, OUT) is coupled to the communication input terminal of the communication chip M1 for outputting a sensing signal, and the sensing input terminal (pin 5 RX) is coupled to the parameter adjusting terminal of the communication chip M1 for receiving a parameter adjusting signal. In order to realize information interaction between the communication module 40 and the sensing module 50, a first resistor R11 is coupled between the communication input end and the sensing output end; a second resistor R13 and a third resistor R14 which are connected in series are coupled between the parameter adjusting end and the sensing input end. The first resistor R11 is used to limit the sensing signal to the region that the communication chip M1 can receive, and the second resistor R13 and the third resistor R14 are used to limit the sensing signal to the region that the sensing chip M2 can receive. The communication chip M1 may be, for example, a bluetooth chip employed in the BT3L bluetooth module.

To achieve the adjustment of the sensing signal, the parameter adjustment signal adjusts the sensing signal through the sensing chip M2. Specifically, the sensing module 50 adjusts the holding time and the magnitude of the sensing signal and the detection distance of the sensing module 50 according to the parameter adjustment signal. Further, the parameter adjusting signal is controlled by a second type of wireless communication signal sent by the Bluetooth communication equipment. It can be understood that when the parameter adjusting signal does not exist, the holding time of the sensing signal is constant, the value is constant, and the brightness and the lighting time are constant on the LED lamp bead 30. Parameter signals are adjusted through second type wireless communication signals, and the brightness and the lighting time of the LED lamp beads 30 can be modified, so that the control mode is more flexible. It can be understood that, in this embodiment, the communication module 40 and the sensing module 50 supplement each other, and on the basis of controlling the LED lamp bead 30 by detecting the movement of the object and controlling the LED lamp bead 30 by the first type of wireless control signal, the parameter modification for controlling the light emission of the sensing module 50 is realized by the second type of wireless control signal. Specifically, the second type wireless control signal is output through a bluetooth communication module of the external device.

To further explain the functions of the first type of wireless control signal and the second type of wireless control signal, three operating modes of the LED driving circuit are explained. The first working mode is as follows: when the sensing module 50 senses the movement of the object, the sensing signal output by the sensing output terminal (pin 3, OUT) of the sensing chip M2 is converted into a high level (within a period of time) and transmitted to the communication module 40 for processing; the communication module 40 receives the sensing signal and outputs a PWM signal for dimming; when the sensing module 50 can not detect the movement of the object, the output sensing signal is converted into a low level, the PWM signal is not output any more, and the LED lamp bead 30 is extinguished. And a second working mode: the LED lamp bead is connected with the communication module through external equipment, and the brightness and the lighting time of the LED lamp bead are directly controlled through a first type of wireless communication signal; a third working module: and adjusting the magnitudes of the induction signal and the duration and level value through the second type of wireless communication signal.

To disclose the operation of the LED power conversion module 20, referring to fig. 1, the rectifying and filtering module 10, the power conversion module 20, and the LED lamp bead 30 (not shown) are coupled in sequence. As shown in fig. 3, the rectifying and filtering module 10 is powered by AC power AC-N and AC power AC-L, and outputs a dc BUS1 after being rectified by a rectifier bridge BD1 and filtered by a pi-type filter circuit, which is a common technical means, see fig. 3. The DC BUS BUS supplies power to the LED lamp bead 30, and both ends of the LED lamp bead 30, LED + and LED-, are shown in FIG. 3. The power conversion module 20 includes a dimming chip U1 and its peripheral circuits, the dimming chip U1 has a dimming signal input terminal (1 pin DIM), and the dimming signal input terminal (1 pin DIM) is used for receiving a PWM signal to realize power conversion. The dimming chip U1 may be a prior art power conversion chip with a PWM signal adjusting port, for example, a dimming chip model BP2306CJ may be used.

In order to disclose the operation of the communication module 40 and the sensing module 50, referring to fig. 2 to 4, the rectifying and filtering module 10 is coupled to the sensing power supply terminal and the communication power supply terminal at the same time. A constant voltage driving module is coupled between the rectifying and filtering module 10 and the power conversion module 20, the constant voltage driving module comprises a constant voltage driving chip U2 and peripheral circuits thereof, and the constant voltage driving chip U2 is provided with a constant voltage input end (4 pins Drain) and a constant voltage output end (6 pins sel). The constant voltage input terminal (4-pin Drain) is coupled to the rectifying and filtering unit, specifically to the DC BUS BUS. The constant voltage output (pin sel 6) is coupled to the inductive supply, the communication supply, and the power conversion module 20. The constant voltage output terminal (6 pin sel) outputs +5V dc voltage through the VOUT line to power the sensing module 50 through the sensing power supply terminal. The constant voltage driver U1 may be a conventional constant voltage driver that can be connected to the dc BUS and output a regulated low voltage (e.g., +5V), such as a constant voltage driver of type BP 8501.

Further, a voltage reduction and stabilization module is coupled between the constant voltage output end (6 pin sel) and the communication power supply end. The buck regulator module includes a buck regulator chip U3 with an input (pin 2) and an output (pin 3) as shown in FIG. 2 and its peripheral circuitry, such as an LDO linear regulator chip U3. Wherein, the input end (pin 2) is connected with the VOUT line of the constant voltage output end (pin 6 sel) to obtain +5V voltage; the output end (pin 3) outputs +3.3V through the buck regulator chip U3, and the +3.3V voltage is connected to the communication power supply end (pin 1) of the communication chip M1, so as to supply power to the communication module 40. The dimming in various modes is realized through the mutual matching of the communication module 40 and the induction module 50; through the second type wireless communication signals input by the external equipment, parameter adjustment of the induction signals is realized, and the dimming mode is further enriched.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. The LED driving circuit compatible with induction control and communication control comprises a rectifying and filtering module, a power conversion module, a communication module and an induction module,

the sensing module is used for detecting the motion of an object in the environment and outputting a corresponding sensing signal according to the motion of the object; it is characterized in that the preparation method is characterized in that,

2. The LED driving circuit according to claim 1, wherein the communication module comprises a communication chip with a communication power supply terminal, a communication input terminal, a communication output terminal and a parameter adjusting terminal, and peripheral circuits thereof, wherein:

a communication input for receiving the sensing signal;

a communication output terminal for outputting the PWM signal;

3. The LED driving circuit of claim 2, wherein the sensing module comprises a sensing chip with a sensing power supply terminal, a sensing input terminal and a sensing output terminal, and a peripheral circuit thereof, wherein:

4. The LED driver circuit of claim 3, wherein a first resistor is coupled between the communication input and the sensing output.

5. The LED driving circuit according to claim 3, wherein a second resistor and a third resistor are coupled in series between the parameter adjustment terminal and the sensing input terminal.

6. The LED driving circuit according to claim 3, wherein the rectifying and filtering module is coupled to the inductive power supply terminal and the communication power supply terminal at the same time.

7. The LED driving circuit according to claim 1, wherein the sensing module is a radar sensing module and the communication module is a Bluetooth communication module.

8. The LED driving circuit according to claim 3, wherein the rectifying and filtering module, the power conversion module and the LED lamp bead are coupled in sequence, the power conversion module comprises a dimming chip with a dimming signal input end and a peripheral circuit thereof, and the dimming signal input end is used for receiving the PWM signal to realize power conversion.

9. The LED driving circuit of claim 8, wherein a constant voltage driving module is coupled between the rectifying-filtering module and the power conversion module, the constant voltage driving module having:

10. The LED driving circuit of claim 9, wherein a buck regulator module is coupled between the constant voltage output and the communication supply.