LED drive circuit and lamp

Abstract

The utility model provides an LED drive circuit and a lamp. The LED driving circuit comprises a constant current driving module, a matter module and an infrared control module, the first input end of the matter module is connected with the output end of the infrared control module, and the output end of the matter module is connected with the control end of the constant current driving module; the input end of the constant-current driving module is connected with an external power supply, and the output end of the constant-current driving module is used for driving an LED to emit light; the input end of the infrared control module is used for receiving an external infrared control signal and sending the external infrared control signal to the matter module through the output end of the infrared control module. The application is compatible with the matter function and the IR infrared remote control function at the same time, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lamps, and in particular to an LED drive circuit and a lamp. Background Art

[0002] As people have higher requirements for living experience, smart home technology has gradually entered people's lives. Matter is an application layer protocol used to achieve interoperability between various smart home ecosystems and voice services, and can use any smart home platform to control their devices.

[0003] In the prior art, lighting products are either only equipped with a matter module for intelligent control, or only equipped with infrared control without matter. However, for multi-generational families, the needs of family members are different, and existing lighting products cannot meet the needs of various family members at the same time, which seriously affects the user experience. Utility Model Content

[0004] The embodiments of the utility model provide an LED driving circuit and a lamp to solve the problem that there is no lamp product compatible with infrared remote control in the prior art, which affects the user experience.

[0005] In a first aspect, an embodiment of the utility model provides an LED driving circuit, comprising: a constant current driving module, a matter module and an infrared control module;

[0006] The first input end of the matter module is connected to the output end of the infrared control module, and the output end of the matter module is connected to the control end of the constant current drive module;

[0007] The input end of the constant current driving module is connected to an external power supply, and the output end of the constant current driving module is used to drive the LED to emit light;

[0008] The input end of the infrared control module is used to receive an external infrared control signal and send it to the matter module through the output end of the infrared control module.

[0009] Optionally, the LED includes: a first LED light string and a second LED light string; wherein the first LED light string and the second LED light string have different colors; the constant current driving module includes: a constant current driving unit and a color adjustment unit;

[0010] The input end of the constant current driving unit is connected to the input end of the constant current driving module, and the output end of the constant current driving unit is connected to the input end of the color adjustment unit;

[0011] The first output end of the color adjustment unit is connected to the positive electrode of the first LED light string and the positive electrode of the second LED light string respectively, the second output end of the color adjustment unit is connected to the negative electrode of the first LED light string, and the third output end of the color adjustment unit is connected to the negative electrode of the second LED light string;

[0012] The color adjustment unit is used to drive the first LED light string to light up, or drive the second LED light string to light up.

[0013] Optionally, the output end of the matter module includes: a first control signal output end and a second control signal output end; the control end of the constant current drive module includes: a first control signal input end and a second control signal input end; the first control signal output end is connected to the first control signal input end, and the second control signal output end is connected to the second control signal input end;

[0014] The first control signal input terminal is connected to the control terminal of the constant current driving unit and is used to receive the dimming signal sent by the matter module;

[0015] The second control signal input terminal is connected to the control terminal of the color adjustment unit and is used for receiving the color adjustment signal sent by the matter module.

[0016] Optionally, the LED driving circuit further includes: a night light module; the output end of the matter module further includes: a third control signal output end;

[0017] The third control signal output terminal is connected to the control terminal of the night light module and is used to send a night light control signal to the night light module.

[0018] Optionally, the external power supply is an AC power supply; the constant current drive unit includes: a rectifier unit and a constant current output subunit;

[0019] The input end of the rectifier unit is connected to the input end of the constant current drive unit, the first output end of the rectifier unit is connected to the input end of the constant current output subunit, and the second output end of the rectifier unit is connected to the first ground end;

[0020] The first output end of the constant current output subunit is connected to the output end of the constant current driving unit, and the second output end of the constant current output subunit is connected to the second ground end.

[0021] Optionally, the color adjustment unit includes: a first switch tube, a second switch tube, a first diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a first voltage regulator diode and a second voltage regulator diode;

[0022] The first end of the first switch tube is respectively connected to the second output end of the color adjustment unit, the cathode of the first voltage regulator diode and the cathode of the first diode, the second end of the first switch tube is connected to the second ground end, and the control end of the first switch tube is respectively connected to the second end of the first resistor, the first end of the second resistor and the control end of the color adjustment unit;

[0023] The first end of the second switch tube is respectively connected to the third output end of the color adjustment unit and the cathode of the second voltage regulator diode, the second end of the second switch tube is connected to the second ground end, and the control end of the second switch tube is respectively connected to the second end of the third resistor, the first end of the fourth resistor and the anode of the first diode;

[0024] The first end of the first resistor and the first end of the third resistor are both connected to the first output end of the color adjustment unit;

[0025] The second end of the second resistor, the second end of the fourth resistor, the anode of the first Zener diode and the anode of the second Zener diode are all connected to the second ground terminal.

[0026] Optionally, the LED driving circuit further includes: a power failure detection module;

[0027] The input end of the power failure detection module is connected to the rectifier unit, and the output end of the power failure detection module is connected to the second input end of the matter module.

[0028] Optionally, the LED driving circuit further includes: a low voltage DC power supply module;

[0029] The input end of the low-voltage DC power supply module is connected to the first output end of the rectifier unit, and the output end of the low-voltage DC power supply module is respectively connected to the power supply end of the matter module and the power supply end of the infrared control module, for powering the matter module and the infrared control module.

[0030] Optionally, the LED driving circuit further includes: an alarm module;

[0031] The alarm module is connected to the matter module and is used to receive the alarm signal sent by the matter module and issue an alarm.

[0032] In a second aspect, an embodiment of the utility model provides a lamp, comprising the LED driving circuit provided in the first aspect of the embodiment of the utility model.

[0033] The embodiment of the utility model provides an LED driving circuit and a lamp. The LED driving circuit includes: a constant current driving module, a matter module and an infrared control module; the first input end of the matter module is connected to the output end of the infrared control module, and the output end of the matter module is connected to the control end of the constant current driving module; the input end of the constant current driving module is connected to an external power supply, and the output end of the constant current driving module is used to drive the LED to emit light; the input end of the infrared control module is used to receive an external infrared control signal, and send it to the matter module through the output end of the infrared control module. The LED driving circuit provided by the embodiment of the utility model can be compatible with both the matter function and the infrared remote control function, can meet the needs of different groups of people at the same time, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 This is a circuit structure diagram of an LED driving circuit provided by an embodiment of the utility model;

[0036] Figure 2 This is a circuit schematic diagram of an infrared control module provided by an embodiment of the utility model;

[0037] Figure 3 It is a circuit schematic diagram of a matter module provided by an embodiment of the utility model;

[0038] Figure 4 This is a circuit structure diagram of another LED driving circuit provided by an embodiment of the utility model;

[0039] Figure 5 This is a circuit schematic diagram of a night light module provided by an embodiment of the utility model;

[0040] Figure 6 This is a schematic diagram of the circuit structure of a constant current drive unit provided by an embodiment of the utility model;

[0041] Figure 7 This is a circuit schematic diagram of a constant current drive unit provided by an embodiment of the utility model;

[0042] Figure 8 This is a circuit schematic diagram of a color adjustment unit provided by an embodiment of the utility model;

[0043] Fig. 9It is a circuit schematic diagram of an optocoupler in a color adjustment unit provided in an embodiment of the utility model;

[0044] Fig.10 This is a circuit schematic diagram of a power-off detection module provided by an embodiment of the utility model;

[0045] Fig.11 This is a circuit schematic diagram of a low-voltage DC power supply module provided by an embodiment of the utility model;

[0046] Fig.12 The utility model provides a circuit schematic diagram of an alarm module. DETAILED DESCRIPTION

[0047] In order to enable people in the technical field to better understand the present solution, the technical solution in the embodiment of the present solution will be clearly described below in conjunction with the drawings in the embodiment of the present solution. Obviously, the described embodiment is an embodiment of a part of the present solution, not all of the embodiments. Based on the embodiments in the present solution, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present solution.

[0048] The term "including" and any other variations in the specification and claims of this solution and the above drawings mean "including but not limited to", and is intended to cover non-exclusive inclusions and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0049] The following is a detailed description of the implementation of the present invention in conjunction with the specific drawings:

[0050] Figure 1 This is a schematic diagram of the structure of an LED driving circuit provided by an embodiment of the utility model. Figure 1 , the LED driving circuit includes: a constant current driving module 11, a matter module 12 and an infrared control module 13;

[0051] The first input end of the matter module 12 is connected to the output end of the infrared control module 13, and the output end of the matter module 12 is connected to the control end of the constant current drive module 11;

[0052] The input end of the constant current driving module 11 is connected to an external power supply, and the output end of the constant current driving module 11 is used to drive the LED to emit light;

[0053] The input end of the infrared control module 13 is used to receive an external infrared control signal, and send the signal to the matter module 12 through the output end of the infrared control module 13 .

[0054] In the embodiment of the utility model, a matter module 12 and an infrared control module 13 are provided at the same time, and the infrared control module 13 is connected to the matter module 12, and the lamp control is realized through the matter module 12. The circuit is compatible with both the matter function and the infrared control function, and can meet the lamp control needs of different groups of people at the same time, greatly improving the user experience.

[0055] Specifically, the infrared control module 13 is used to receive external infrared control signals. Figure 2 , the details will not be repeated here.

[0056] Matter module 12 can be directly formed by a proprietary chip, the circuit schematic diagram is referenced Figure 3 , the details will not be repeated here.

[0057] In one possible implementation, reference Figure 4 , the LED may include: a first LED light string LED1 and a second LED light string LED2; wherein the first LED light string LED1 and the second LED light string LED2 have different colors; the constant current driving module 11 may include: a constant current driving unit 111 and a color adjusting unit 112;

[0058] The input end of the constant current driving unit 111 is connected to the input end of the constant current driving module 11, and the output end of the constant current driving unit 111 is connected to the input end of the color adjustment unit 112;

[0059] The first output end of the color adjustment unit 112 is connected to the positive electrode of the first LED light string LED1 and the positive electrode of the second LED light string LED2 respectively, the second output end of the color adjustment unit 112 is connected to the negative electrode of the first LED light string LED1, and the third output end of the color adjustment unit 112 is connected to the negative electrode of the second LED light string LED2;

[0060] The color adjustment unit 112 is used to drive the first LED light string LED1 to light up, or drive the second LED light string LED2 to light up.

[0061] In the embodiment of the utility model, two light strings of different colors are provided, and the color adjustment unit 112 drives the first LED light string LED1 to light up, or drives the second LED light string LED2 to light up, so as to achieve color adjustment.

[0062] In one possible implementation, reference Figure 4 , the output end of the matter module 12 may include: a first control signal output end and a second control signal output end; the control end of the constant current driving module 11 may include: a first control signal input end and a second control signal input end; the first control signal output end is connected to the first control signal input end, and the second control signal output end is connected to the second control signal input end;

[0063] The first control signal input terminal is connected to the control terminal of the constant current driving unit 111 and is used to receive the dimming signal PWM1 sent by the matter module 12;

[0064] The second control signal input terminal is connected to the control terminal of the color adjustment unit 112 and is used for receiving the color adjustment signal PWM2 sent by the matter module 12 .

[0065] In an embodiment of the utility model, the matter module 12 outputs a dimming signal PWM1 to adjust the output current of the constant current driving unit 111 to achieve dimming; the matter module 12 also outputs a color adjustment signal PWM2 to control the first LED light string LED1 to light up, or the second LED light string LED2 to light up, to achieve color adjustment, so that the lamp has both dimming and color adjustment functions.

[0066] In one possible implementation, reference Figure 4 , the LED driving circuit may further include: a night light module 14; the output end of the matter module 12 may further include: a third control signal output end;

[0067] The third control signal output terminal is connected to the control terminal of the night light module 14 , and is used for sending a night light control signal PWM3 to the night light module 14 .

[0068] In the embodiment of the utility model, a night light module 14 (including a small night light) is also provided to realize nighttime lighting, which is also controlled by the matter module 12 .

[0069] Specifically, the circuit schematic diagram of the night light module 14 is shown in Figure 5 The night light control signal PWM3 controls the on and off of the switch tube, thereby realizing the control of the night light; the details will not be repeated here.

[0070] In one possible implementation, reference Figure 6 , the external power supply may be an AC power supply; the constant current driving unit 111 may include: a rectifier unit 1111 and a constant current output subunit 1112;

[0071] The input end of the rectifier unit 1111 is connected to the input end of the constant current driving unit 111, the first output end of the rectifier unit 1111 is connected to the input end of the constant current output subunit 1112, and the second output end of the rectifier unit 1111 is connected to the first ground terminal GND;

[0072] A first output terminal of the constant current output subunit 1112 is connected to the output terminal of the constant current driving unit 111 , and a second output terminal of the constant current output subunit 1112 is connected to the second ground terminal PGND1 .

[0073] The rectifier unit 1111 is used to rectify the AC unit, and the constant current output subunit 1112 is used to supply constant current to the lamp.

[0074] The circuit schematic diagram of the rectifier unit 1111 and the constant current output unit 1112 is shown in FIG. Figure 7 , the details will not be repeated here.

[0075] In one possible implementation, reference Figure 8 The color adjustment unit 112 may include: a first switch tube Q1, a second switch tube Q2, a first diode D1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first voltage regulator diode TV1 and a second voltage regulator diode TV2;

[0076] The first end of the first switch tube Q1 is respectively connected to the second output end of the color adjustment unit 112, the cathode of the first voltage regulator diode TV1 and the cathode of the first diode D1, the second end of the first switch tube Q1 is connected to the second ground terminal PGND1, and the control end of the first switch tube Q1 is respectively connected to the second end of the first resistor R1, the first end of the second resistor R2 and the control end of the color adjustment unit 112;

[0077] The first end of the second switch tube Q2 is respectively connected to the third output end of the color adjustment unit 112 and the cathode of the second voltage regulator diode TV2, the second end of the second switch tube Q2 is connected to the second ground end PGND1, and the control end of the second switch tube Q2 is respectively connected to the second end of the third resistor R3, the first end of the fourth resistor R4 and the anode of the first diode D1;

[0078] The first end of the first resistor R1 and the first end of the third resistor R3 are both connected to the first output end of the color adjustment unit 112;

[0079] The second end of the second resistor R2 , the second end of the fourth resistor R4 , the anode of the first Zener diode TV1 , and the anode of the second Zener diode TV2 are all connected to the second ground terminal PGND1 .

[0080] In the embodiment of the utility model, two switch tubes are used to control the first LED light string LED1 and the second LED light string LED2. For example, when the color adjustment signal PWM2 is at a high level, the first switch tube Q1 is turned on, and the first LED light string LED1 is lit; at this time, the voltage at the second output end of the color adjustment unit 112 is pulled down, and the voltage at the control end of the second switch tube Q2 is pulled down through the first diode D1, and the second switch tube Q2 is disconnected, and the second LED light string LED2 is turned off.

[0081] On the contrary, when the color adjustment signal PWM2 is at a low level, the first switch tube Q1 is disconnected, and the first LED light string LED1 is turned off; the third resistor R3 and the fourth resistor R4 divide the voltage to provide a high level for the control end of the second switch tube Q2, the second switch tube Q2 is turned on, and the second LED light string LED2 is lit to achieve color adjustment.

[0082] The first voltage stabilizing diode TV1 and the second voltage stabilizing diode TV2 are used for voltage stabilization.

[0083] In one possible implementation, reference Fig. 9 , the color adjustment unit 112 may further include: an optical coupler;

[0084] The control end of the color adjustment unit 112 is connected to the control end of the first switch tube Q1 through an optical coupler.

[0085] Specific circuit reference Fig. 9 The optical coupler is used to amplify the color modulation signal PWM2, and the details are not repeated here.

[0086] In one possible implementation, reference Fig.10 , the LED driving circuit may further include: a power-off detection module;

[0087] The input end of the power failure detection module is connected to the rectifier unit 1111 , and the output end of the power failure detection module is connected to the second input end of the matter module 12 .

[0088] In the embodiment of the utility model, a power failure detection module is further provided to detect whether the power is failed, so that the matter module 12 can take corresponding countermeasures when the power is failed.

[0089] Specifically, Figure 7 A specific circuit schematic diagram of the rectifier unit 1111 is shown. Fig.10 The specific schematic diagram of the power failure detection module is shown. Figure 7 The power-off detection module can detect the voltage at the input end of the rectifier bridge to perform power-off detection.

[0090] In a possible implementation, the LED driving circuit may further include: a low-voltage DC power supply module;

[0091] The input end of the low-voltage DC power supply module is connected to the first output end of the rectifier unit 1111, and the output end of the low-voltage DC power supply module is respectively connected to the power supply end of the matter module 12 and the power supply end of the infrared control module 13, for powering the matter module 12 and the infrared control module 13.

[0092] In the embodiment of the utility model, a low-voltage DC power supply module is provided to provide low-voltage DC power to each module.

[0093] In a possible implementation, the low voltage DC power supply module may include: a first DCDC unit and a second DCDC unit;

[0094] The input end of the first DCDC unit is connected to the input end of the low-voltage DC power supply module, and the output end of the first DCDC unit is connected to the input end of the second DCDC unit, for outputting a first voltage;

[0095] The output terminal of the second DCDC unit is used to output a second voltage.

[0096] The circuit schematic diagram of the first DCDC unit and the second DCDC unit is shown in the figure below. Fig.11 , the details will not be repeated here.

[0097] Exemplarily, the first voltage is 5V and the second voltage is 3.3V.

[0098] The first voltage can be used to power the infrared control module 13 and the power failure detection module, and the second voltage can be used to power the night light module 14 and the matter module 12.

[0099] In one possible implementation, reference Figure 4 , the LED driving circuit may further include: an alarm module 15;

[0100] The alarm module 15 is connected to the matter module 12 and is used to receive the alarm signal sent by the matter module 12 and issue an alarm.

[0101] Specifically, refer to Fig.12 The alarm module 15 includes a buzzer. When receiving the alarm signal sent by the matter module 12, the buzzer emits a sound to warn.

[0102] Corresponding to the above embodiment, the embodiment of the utility model further provides a lamp, including the LED driving circuit provided by the above embodiment, and having the advantages of the above LED driving circuit, which will not be described in detail here.

[0103] The above embodiment is described below in conjunction with specific embodiments.

[0104] After power-on, the lamp enters the pairing state (with a 500ms shielding time). After 500ms, the infrared remote controller can normally control the switch / dimming / color adjustment / night light functions of the lamp through the infrared control module 13; this mode is equivalent to executing only the infrared remote control function;

[0105] After networking and pairing, enter the mode compatible with the matter function and the infrared remote control function, which can support the switch / dimming / color adjustment of the lamp by mobile phone APP or smart speaker voice control. At the same time, the infrared remote control can also be controlled at the same time, and the current status of the lamp set by the infrared remote control can be synchronously displayed on the mobile phone APP (for example, the mobile phone APP displays: PWM1=70%, cold white light, etc.).

[0106] The above-mentioned lamps are well compatible with the infrared remote control function and the matter function. The perfect integration of the two can meet the needs of different users and greatly improve the user experience.

[0107] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An LED driving circuit, characterized in that: include: Constant current drive module, matter module and infrared control module; The first input end of the matter module is connected to the output end of the infrared control module, and the output end of the matter module is connected to the control end of the constant current drive module; The input end of the constant current driving module is connected to an external power supply, and the output end of the constant current driving module is used to drive the LED to emit light; The input end of the infrared control module is used to receive an external infrared control signal, and send it to the matter module through the output end of the infrared control module.

2. The LED driving circuit according to claim 1, characterized in that: The LED comprises: a first LED light string and a second LED light string; wherein the first LED light string and the second LED light string have different colors; the constant current driving module comprises: a constant current driving unit and a color adjustment unit; The input end of the constant current driving unit is connected to the input end of the constant current driving module, and the output end of the constant current driving unit is connected to the input end of the color adjustment unit; The first output end of the color adjustment unit is connected to the positive electrode of the first LED light string and the positive electrode of the second LED light string respectively, the second output end of the color adjustment unit is connected to the negative electrode of the first LED light string, and the third output end of the color adjustment unit is connected to the negative electrode of the second LED light string; The color adjustment unit is used to drive the first LED light string to light up, or drive the second LED light string to light up.

3. The LED driving circuit according to claim 2, characterized in that: The output end of the matter module includes: a first control signal output end and a second control signal output end; the control end of the constant current drive module includes: a first control signal input end and a second control signal input end; the first control signal output end is connected to the first control signal input end, and the second control signal output end is connected to the second control signal input end; The first control signal input terminal is connected to the control terminal of the constant current driving unit, and is used to receive the dimming signal sent by the matter module; The second control signal input terminal is connected to the control terminal of the color adjustment unit, and is used for receiving the color adjustment signal sent by the matter module.

4. The LED driving circuit according to claim 3, characterized in that: Also includes: Night light module; The output end of the matter module also includes: a third control signal output end; The third control signal output terminal is connected to the control terminal of the night light module and is used to send a night light control signal to the night light module.

5. The LED driving circuit according to claim 2, characterized in that: The external power supply is an AC power supply; the constant current drive unit includes: a rectifier unit and a constant current output subunit; The input end of the rectifier unit is connected to the input end of the constant current drive unit, the first output end of the rectifier unit is connected to the input end of the constant current output subunit, and the second output end of the rectifier unit is connected to the first ground end; The first output end of the constant current output subunit is connected to the output end of the constant current driving unit, and the second output end of the constant current output subunit is connected to the second ground end.

6. The LED driving circuit according to claim 5, characterized in that: The color adjustment unit includes: a first switch tube, a second switch tube, a first diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a first voltage regulator diode and a second voltage regulator diode; The first end of the first switch tube is respectively connected to the second output end of the color adjustment unit, the cathode of the first voltage regulator diode and the cathode of the first diode, the second end of the first switch tube is connected to the second ground end, and the control end of the first switch tube is respectively connected to the second end of the first resistor, the first end of the second resistor and the control end of the color adjustment unit; The first end of the second switch tube is respectively connected to the third output end of the color adjustment unit and the cathode of the second voltage regulator diode, the second end of the second switch tube is connected to the second ground end, and the control end of the second switch tube is respectively connected to the second end of the third resistor, the first end of the fourth resistor and the anode of the first diode; The first end of the first resistor and the first end of the third resistor are both connected to the first output end of the color adjustment unit; The second end of the second resistor, the second end of the fourth resistor, the anode of the first Zener diode, and the anode of the second Zener diode are all connected to the second ground end.

7. The LED driving circuit according to claim 5, characterized in that: Also includes: Power failure detection module; The input end of the power-off detection module is connected to the rectifier unit, and the output end of the power-off detection module is connected to the second input end of the matter module.

8. The LED driving circuit according to any one of claims 5 to 7, characterized in that: Also includes: Low voltage DC power supply module; The input end of the low-voltage DC power supply module is connected to the first output end of the rectifier unit, and the output end of the low-voltage DC power supply module is respectively connected to the power supply end of the matter module and the power supply end of the infrared control module, for powering the matter module and the infrared control module.

9. The LED driving circuit according to any one of claims 1 to 7, characterized in that: Also includes: Alarm module; The alarm module is connected to the matter module and is used to receive the alarm signal sent by the matter module and issue an alarm.

10. A lamp, characterized in that: The LED driving circuit comprises the LED driving circuit as claimed in any one of claims 1 to 9.

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