LED driver circuit and lamp

Abstract

The present invention provides an LED driving circuit and a lamp including the LED driving circuit, which combine a matter(registered trademark) function and an IR infrared remote control function to improve the user experience. [Solution] The LED driving circuit includes a constant current driving module 11, a matter module 12 and an infrared control module 13, where a first input end of the matter module is connected to the output end of the infrared control module, 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, the output end of the constant current driving module is used to drive the emission of the LED, and the input end of the infrared control module is used to receive an external infrared control signal and transmit it to the matter module via the output end of the infrared control module.

Description

[Technical field]

[0001] The present invention relates to the field of lamp technology, and in particular to an LED driving circuit and a lamp. [Background technology]

[0002] As people have higher demands on living experience, smart home technology gradually enters into people's lives. Matter is an application layer protocol that is used to realize the interoperability between various smart home ecosystems and voice services, and allows any smart home platform to control these devices.

[0003] In the prior art, a lamp product is only equipped with a matter module to realize smart control, or is equipped with no matter module and only an infrared control module. However, for a multi-generational family living together, the needs of the members in the family are different, and the traditional lamp products cannot simultaneously meet the needs of various and different family members, which seriously affects the user experience. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiment of the present invention provides an LED driving circuit and a lamp, so as to solve the problem that there is no lamp product in the prior art that can be compatible with matter and infrared remote control, which affects user experience. [Means for solving the problem]

[0005] In a first aspect, an embodiment of the present invention provides an LED driving circuit, the LED driving circuit including a constant current driving module, a matter module and an infrared control module; A first input end of the matter module is connected to an output end of the infrared control module, and an output end of the matter module is connected to a 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 transmit it to the matter module through the output end of the infrared control module.

[0006] Optionally, the LED includes a first LED line light and a second LED line light, where the first LED line light and the second LED line light have different colors; the constant current driving module includes a constant current driving unit and a color adjusting 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 matching unit; The first output end of the color adjusting unit is respectively connected to the positive pole of the first LED line light and the positive pole of the second LED line light, the second output end of the color adjusting unit is connected to the negative pole of the first LED line light, and the third output end of the color adjusting unit is connected to the negative pole of the second LED line light; The color adjusting unit is used to drive the first LED line light to light up or drive the second LED line light to light up.

[0007] 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 driving 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 from the matter module; The second control signal input terminal is connected to the control terminal of the toning unit, and is used for receiving the toning signal sent from the matter module.

[0008] Optionally, the LED driving circuit further includes a night-light module, and the output end of the matter module further 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 for sending the night-light control signal to the night-light module.

[0009] Optionally, the external power source is an AC power source, and the constant current driving unit includes a rectifying sub-unit and a constant current output sub-unit; The input end of the rectifier subunit is connected to the input end of the constant current driving unit, the first output end of the rectifier subunit is connected to the input end of the constant current output subunit, and the second output end of the rectifier subunit is connected to the first ground end; The first output end of the constant current output sub-unit is connected to the output end of the constant current driving unit, and the second output end of the constant current output sub-unit is connected to the second ground end.

[0010] Optionally, the color tuning unit includes a first switch transistor, a second switch transistor, a first diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a first Zener diode and a second Zener diode; A first end of the first switch transistor is respectively connected to the second output end of the color tuning unit, the cathode of the first Zener diode and the cathode of the first diode, a second end of the first switch transistor is connected to the second ground end, and a control end of the first switch transistor 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 tuning unit; A first end of the second switch transistor is respectively connected to the third output end of the color adjusting unit and the cathode of the second Zener diode, a second end of the second switch transistor is respectively connected to the second ground end, and a control end of the second switch transistor 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; A first end of the first resistor and a first end of the third resistor are both connected to a first output end of the color adjusting 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 a second ground terminal.

[0011] Optionally, the LED driving circuit further includes a power-down detection module; The input end of the power-down detection module is connected to the rectification sub-unit, and the output end of the power-down detection module is connected to the second input end of the matter module.

[0012] Optionally, the LED driving circuit further includes a 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 rectification sub-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, used to power the matter module and the infrared control module.

[0013] Optionally, the LED driving circuit further includes an alarm module; The alarm module is connected to the matter module, and is used to receive the alarm signal sent from the matter module and issue an alarm.

[0014] In a second aspect, an embodiment of the present invention provides a lamp including an LED driving circuit as provided in the first aspect of the embodiment of the present invention. Effect of the Invention

[0015] The embodiment of the present invention 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, 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 source, the output end of the constant current driving module is used to drive the light emission of the LED, and 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 in the embodiment of the present invention can achieve both the matter function and the infrared remote control function, which can meet the needs of different people at the same time and improve the user experience. [Brief description of the drawings]

[0016] In the following, in order to more clearly explain the technical solutions in the embodiments of the present invention, drawings that need to be used in the description of the embodiments or prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative efforts. [Figure 1] FIG. 1 is a schematic diagram of the circuit structure of an LED driving circuit provided in an embodiment of the present invention. [Diagram 2] FIG. 2 is a circuit diagram of the infrared control module provided in the embodiment of the present invention. [Diagram 3] FIG. 3 is a circuit diagram of a matter module provided in an embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram of a circuit structure of another LED driving circuit provided in an embodiment of the present invention. [Diagram 5] FIG. 5 is a circuit diagram of the night-light module provided in the embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram of a circuit structure of a constant current driving unit provided in an embodiment of the present invention. [Figure 7]FIG. 7 is a circuit diagram of a constant current driving unit provided in an embodiment of the present invention. [Figure 8] FIG. 8 is a circuit diagram of a color adjusting unit provided in an embodiment of the present invention. [Figure 9] FIG. 9 is a circuit diagram of an optical coupler in a color adjusting unit provided in an embodiment of the present invention. [Figure 10] FIG. 10 is a circuit diagram of the power-down detection module provided in the embodiment of the present invention. [Figure 11] FIG. 11 is a circuit diagram of a low-voltage DC power supply module provided in an embodiment of the present invention. [Figure 12] FIG. 12 is a circuit diagram of the alarm module provided in the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] In order to make those skilled in the art better understand the present solution, the technical solutions in the embodiments of the present solution are described below with reference to the drawings in the embodiments of the present solution, and obviously, the described embodiments are only some of the embodiments of the present solution, but not all of the embodiments. Based on the embodiments of the present solution, all other embodiments that those skilled in the art can devise without making creative efforts should be within the scope of protection of the present solution.

[0018] The term "comprises" and any other variations thereof in the description of the solution, the claims and the above drawings mean "including but not limited to" and are intended to cover a non-exclusive inclusion, and are not limited to the examples given herein. Also, the terms "first", "second", etc. are intended to distinguish different objects, and are not intended to describe a particular order.

[0019] The implementation of the present invention will be described in detail below with reference to the specific drawings.

[0020] FIG 1 is a schematic diagram of the structure of an LED driving circuit provided in an embodiment of the present invention. Referring to FIG 1, the LED driving circuit includes a constant current driving module 11, a matter module 12 and an infrared control module 13; 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 driving module 11; The input terminal of the constant current driving module 11 is connected to an external power supply, and the output terminal of the constant current driving module 11 is used to drive the LED to emit light; The input end of the infrared control module 13 is used to receive an external infrared control signal, and transmit it to the matter module 12 via the output end of the infrared control module 13 .

[0021] In the embodiment of the present invention, the matter module 12 and the infrared control module 13 are installed at the same time, and the infrared control module 13 is connected to the matter module 12, so as to realize lamp control by the matter module 12. This circuit combines the matter function and the infrared control function, and can simultaneously meet the lamp control requirements of different people, greatly improving the user experience.

[0022] Specifically, the infrared control module 13 is used to receive an external infrared control signal, the circuit principle diagram of which is shown in FIG. 2, and the details are not repeated here.

[0023] The matter module 12 can be directly formed by a dedicated chip, and the circuit principle diagram can be referred to FIG. 3, and the details will not be described here repeatedly.

[0024] In a possible embodiment, referring to FIG. 4 , the LED may include a first LED line light LED1 and a second LED line light LED2, where the first LED line light LED1 and the second LED line light LED2 have different colors; the constant current driving module 11 may include a constant current driving unit 111 and a color adjusting unit 112; 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 input end of the constant current driving unit 111 can be understood as the input end of the constant current driving module 11; the output end of the constant current driving unit 111 is connected to the input end of the color adjusting unit 112; The first output end of the color adjusting unit 112 is respectively connected to the positive pole of the first LED line light LED1 and the positive pole of the second LED line light LED2, the second output end of the color adjusting unit 112 is connected to the negative pole of the first LED line light LED1, and the third output end of the color adjusting unit 112 is connected to the negative pole of the second LED line light LED2; The color adjusting unit 112 is used to drive the first LED line light LED1 to light up or drive the second LED line light LED2 to light up.

[0025] In the embodiment of the present invention, two different color line lights are installed, and the color adjusting unit 112 drives the first LED line light LED1 to light or drives the second LED line light LED2 to light, thereby achieving color adjustment.

[0026] In a possible embodiment, referring to FIG. 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; 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 from the matter module 12, and the control terminal of the constant current driving unit 111 can be understood as the first control signal input terminal of the constant current driving module 11; The second control signal input terminal is connected to the control terminal of the color adjusting unit 112, and is used to receive the color adjusting signal PWM2 sent from the matter module 12. The control terminal of the color adjusting unit 112 may be understood as the second control signal input terminal of the constant current driving module 11.

[0027] In the embodiment of the present invention, the matter module 12 outputs a dimming signal PWM1 to adjust the output current of the constant current driving unit 111 to achieve dimming, and the matter module 12 further outputs a color adjusting signal PWM2 to control the lighting of the first LED line light LED1 or the lighting of the second LED line light LED2 to achieve color adjusting, so that the lamp can achieve both dimming and color adjusting functions.

[0028] In a possible embodiment, referring to FIG. 4, the LED driving circuit may further include a night-light module 14, and the output end of the matter module 12 may further include a third control signal output end; The third control signal output terminal is connected to the control terminal of the night-light module 14, and is used to send the night-light control signal PWM3 to the night-light module 14.

[0029] In the embodiment of the present invention, a night-light module 14 (including a night light) is further provided, which is used to realize night lighting and is also controlled by the matter module 12 .

[0030] Specifically, the circuit diagram of the night-light module 14 is shown in FIG. 5, and the night-light control signal PWM3 controls the on / off of the switch transistor, thereby realizing the control of the night light, and the details are not described here repeatedly.

[0031] In a possible embodiment, referring to FIG. 6, the external power supply may be an AC power supply, and the constant current driving unit 111 may include a rectifying sub-unit 1111 and a constant current output sub-unit 1112; The input end of the rectifier subunit 1111 is connected to the input end of the constant current driving unit 111, and the input end of the rectifier subunit 1111 can be understood as the input end of the constant current driving unit 111; the first output end of the rectifier subunit 1111 is connected to the input end of the constant current output subunit 1112; and the second output end of the rectifier subunit 1111 is connected to the first ground end GND; The first output terminal of the constant current output sub-unit 1112 is connected to the output terminal of the constant current driving unit 111, and the first output terminal of the constant current output sub-unit 1112 may be understood to be the output terminal of the constant current driving unit 111, and the second output terminal of the constant current output sub-unit 1112 is connected to the second ground terminal PGND1.

[0032] The rectification subunit 1111 is used to rectify the AC power supply, and the constant current output subunit 1112 is used to power the lamp with a constant current.

[0033] The circuit principle diagram of the rectifier sub-unit 1111 and the constant current output sub-unit 1112 is referred to FIG. 7, and the details are not repeated here.

[0034] In a possible embodiment, referring to FIG. 8, the color adjusting unit 112 may include: a first switch transistor Q1, a second switch transistor Q2, a first diode D1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first Zener diode TV1 and a second Zener diode TV2; The first end of the first switch transistor Q1 is respectively connected to the second output end of the color tuning unit 112, the cathode of the first Zener diode TV1 and the cathode of the first diode D1; the second end of the first switch transistor Q1 is respectively connected to the second ground end PGND1; the control end of the first switch transistor 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 tuning unit 112; The first end of the second switch transistor Q2 is respectively connected to the third output end of the color adjusting unit 112 and the cathode of the second Zener diode TV2, the second end of the second switch transistor Q2 is respectively connected to the second ground end PGND1, and the control end of the second switch transistor 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; 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 adjusting unit 112; 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 a second ground end PGND1.

[0035] In the embodiment of the present invention, the first LED line light LED1 and the second LED line light LED2 are controlled by two switch transistors. For example, when the color adjusting signal PWM2 is at a high level, the first switch transistor Q1 is turned on, and the first LED line light LED1 is turned on; at this time, the voltage of the second output terminal of the color adjusting unit 112 is pulled down, and the voltage of the control terminal of the second switch transistor Q2 is pulled down accordingly through the first diode D1, and the second switch transistor Q2 is turned off, and the second LED line light LED2 is turned off.

[0036] Conversely, when the color adjusting signal PWM2 is at a low level, the first switch transistor Q1 is turned off, the first LED line light LED1 is turned off, the third resistor R3 and the fourth resistor R4 divide the voltage and provide a high level to the control end of the second switch transistor Q2, so that the second switch transistor Q2 is turned on, and the second LED line light LED2 is turned on, thereby achieving color adjusting.

[0037] However, the first Zener diode TV1 and the second Zener diode TV2 are used to stabilize the voltage.

[0038] In a possible implementation, referring to FIG. 9, the color adjusting unit 112 may further include an optical combiner; The control end of the color adjusting unit 112 is connected to the control end of the first switch transistor Q1 through an optical coupler.

[0039] The specific circuit can be seen in FIG. 9, where an optical coupler is used to amplify the color tuning signal PWM2, and the details are not repeated here.

[0040] In a possible embodiment, referring to FIG. 10, the LED driving circuit may further include a power-down detection module; The input end of the power-down detection module is connected to the rectification sub-unit 1111 , and the output end of the power-down detection module is connected to the second input end of the matter module 12 .

[0041] In an embodiment of the present invention, a power-down detection module is further provided, which is used to detect whether the power supply is powered down, so that the matter module 12 takes corresponding countermeasures when the power supply is powered down.

[0042] Specifically, Fig. 7 shows a specific circuit diagram of the rectifier subunit 1111. Fig. 10 shows a specific diagram of the power-down detection module, referring to Fig. 7, the power-down detection module can detect the power-down by detecting the voltage at the input end of the rectifier bridge.

[0043] In a possible embodiment, the LED driving circuit may further include a 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 subunit 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, used to power the matter module 12 and the infrared control module 13.

[0044] In an embodiment of the present invention, a low-voltage DC power supply module is installed and used to supply low-voltage DC power to each module.

[0045] In a possible embodiment, the low-voltage DC power supply module may include a first DCDC unit and a second DCDC unit; 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, which is used to output a first voltage; The output end of the second DCDC unit is used to output a second voltage.

[0046] The circuit principle diagram of the first DCDC unit and the second DCDC unit is shown in FIG. 11, and the details are not described here repeatedly.

[0047] As an example, the first voltage is 5V and the second voltage is 3.3V.

[0048] The first voltage can be used to power the infrared control module 13 and the power down detection module, and the second voltage can be used to power the night light module 14 and the matter module 12.

[0049] In a possible embodiment, referring to FIG. 4, the LED driving circuit may further include an alarm module 15; The alarm module 15 is connected to the matter module 12 and is used to receive the alarm signal sent from the matter module 12 and issue an alarm.

[0050] Specifically, referring to FIG. 12, the alarm module 15 includes a buzzer, and upon receiving a warning signal sent from the matter module 12, the buzzer emits a sound to warn the user.

[0051] Corresponding to the above embodiments, an embodiment of the present invention further provides a lamp, which includes the LED driving circuit provided in the above embodiments, and has the advantages of the LED driving circuit, and details will not be described repeatedly here.

[0052] The above embodiment will be described below in conjunction with a specific example.

[0053] After powering on, the lamp will enter pairing state (with 500ms occlusion time), after 500ms, the infrared remote control can normally control the switch / dimming / color changing / night light and other functions of this lamp by the infrared control module 13, this mode is equivalent to only running the infrared remote control function, After connecting to the network and pairing, it will enter a mode that combines the matter function and the infrared remote control function, and support voice control of the lamp's functions such as switch / dimming / color adjustment through the mobile phone APP or smart speaker. 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, PWM1=70%, cold white light, etc. will be displayed on the mobile phone APP).

[0054] The above lamp can well combine the infrared remote control function and the matter function, perfectly integrate the two, meet the needs of different users, and greatly improve the user experience.

[0055] The above embodiments are only for illustrating the technical solutions of the present invention, but are not intended to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical solutions described in the above embodiments or replace some of the technical features with equivalents, and such modifications or replacements will not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Including a constant current driving module, a matter module and an infrared control module; A first input end of the matter module is connected to an output end of the infrared control module, and an output end of the matter module is connected to a 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 the output end of the infrared control module is used to transmit the control signal to the matter module; 1. An LED drive circuit comprising:

2. The LED includes a first LED line light and a second LED line light, and the first LED line light and the second LED line light have different colors; the constant current driving module includes a constant current driving unit and a color adjusting 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 matching unit; A first output end of the color adjusting unit is respectively connected to the positive pole of the first LED line light and the positive pole of the second LED line light, a second output end of the color adjusting unit is connected to the negative pole of the first LED line light, and a third output end of the color adjusting unit is connected to the negative pole of the second LED line light; The color adjusting unit is used to drive the first LED line light or the second LED line light; 2. The LED driving circuit according to claim 1 .

3. 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 driving 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 from the matter module; The second control signal input terminal is connected to the control terminal of the color matching unit, and is used to receive the color matching signal sent from the matter module; 3. The LED driving circuit according to claim 2 .

4. Further includes a night-light module, and the output end of the matter module further 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 for sending a night-light control signal to the night-light module; 4. The LED driving circuit according to claim 3.

5. The external power source is an AC power source, and the constant current driving unit includes a rectifier sub-unit and a constant current output sub-unit; The input end of the rectifier subunit is connected to the input end of the constant current driving unit, the first output end of the rectifier subunit is connected to the input end of the constant current output subunit, and the second output end of the rectifier subunit is connected to a first ground end; A first output terminal of the constant current output sub-unit is connected to an output terminal of the constant current driving unit, and a second output terminal of the constant current output sub-unit is connected to a second ground terminal.

3. The LED driving circuit according to claim 2 .

6. The color tuning unit includes a first switch transistor, a second switch transistor, a first diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a first Zener diode, and a second Zener diode; A first end of the first switch transistor is respectively connected to the second output end of the color tuning unit, the cathode of the first Zener diode and the cathode of the first diode, a second end of the first switch transistor is respectively connected to the second ground end, and a control end of the first switch transistor 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 tuning unit; A first end of the second switch transistor is respectively connected to the third output end of the color adjusting unit and the cathode of the second Zener diode, a second end of the second switch transistor is respectively connected to the second ground end, and a control end of the second switch transistor 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; A first end of the first resistor and a first end of the third resistor are both connected to a first output end of the color adjusting unit; a second end of the second resistor, a second end of the fourth resistor, an anode of the first Zener diode, and an anode of the second Zener diode are all connected to the second ground terminal; 6. The LED driving circuit according to claim 5.

7. further comprising a power down detection module; The input end of the power-down detection module is connected to the rectification sub-unit, and the output end of the power-down detection module is connected to the second input end of the matter module; 6. The LED driving circuit according to claim 5.

8. Further comprising a low voltage direct current power supply module; The input end of the low-voltage DC power supply module is connected to the first output end of the rectifier sub-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, and is used to power the matter module and the infrared control module; 8. The LED drive circuit according to claim 5, wherein the first and second input terminals are connected to the first and second input terminals.

9. further comprising an alarm module; The alarm module is connected to the matter module, and is used to receive an alarm signal sent from the matter module and issue an alarm; 8. The LED drive circuit according to claim 1, wherein the first and second input terminals are connected to the first and second input terminals.

10. An LED driver circuit according to any one of claims 1 to 7, A lamp characterized by:

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