LED driving device and LED lamp

Abstract

The utility model provides a kind of LED driving device and LED lamp.The above-mentioned LED driving device includes: main power circuit, control circuit and power identification circuit;LED driving device is powered by alternating current power supply or direct current emergency power supply;The first input end and the second input end of main power circuit are used to be connected with the anode and cathode of direct current emergency power supply, also be used to be connected with the zero line and live wire of alternating current power supply, output end is connected with LED lamp string, control end is connected with the output end of control circuit;The output end of power identification circuit is connected with the input end of control circuit, for obtaining the power supply signal of LED driving device;Wherein, power supply signal is used to indicate that LED driving device is powered by direct current or alternating current supply.The utility model sets power identification circuit to identify whether power supply is alternating current or direct current, automatically carries out power switching, only needs to connect two power supply lines between driving device and emergency power supply, wiring is simple, error-prone, and it is more convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lamp technical field especially relates to a LED drive arrangement and LED lamp. BACKGROUND

[0002] Emergency lighting system is mainly used for normal lighting power cut-off or power grid power failure, provides the lamps and lanterns of lighting. It is often used in factory, government, school, building and tunnel. The commonly used emergency lighting system is usually composed of ordinary LED lighting lamp and emergency power supply, when the AC power supply is normal, the lighting lamp is powered by AC power supply, when the AC power supply fails, the lighting lamp is powered by emergency power supply. Because the capacity of emergency power supply is limited, in order to ensure the lighting time, when the AC power supply fails and is powered by emergency power supply, the power of lighting lamp needs to be reduced to increase the lighting time.

[0003] In the prior art, the emergency power supply is usually directly purchased as a finished product, when the emergency power supply is connected with the lighting lamp, in order to realize the power switching when AC and DC power supply, the communication between the lighting lamp and the emergency power supply is needed, so that the lighting lamp can know its power supply type, thereby realizing the power switching. Based on this, the connection between the emergency power supply and the lighting lamp is complex, the operation is tedious, and wiring errors are prone to occur. SUMMARY

[0004] The utility model embodiment provides a kind of LED drive arrangement and LED lamp, to solve the wiring complex between LED and emergency power supply in prior art, prone to error Problem.

[0005] Firstly, the utility model embodiment provides a kind of LED drive arrangement, comprising: main power circuit, control circuit and power identification circuit;Wherein, LED drive arrangement is powered by AC power supply or DC emergency power supply;

[0006] The first input end and the second input end of main power circuit are used to connect with the anode and cathode of DC emergency power supply, the first input end and the second input end of main power circuit are also used to connect with the zero line and live wire of AC power supply, the output end of main power circuit is connected with LED lamp string, the control end of main power circuit is connected with the output end of control circuit;

[0007] The output end of power identification circuit is connected with the input end of control circuit, for obtaining the power supply signal of LED drive arrangement, and sends to control circuit;

[0008] Wherein, power supply signal is used to indicate that LED drive arrangement is powered by DC or AC.

[0009] Optionally, power identification circuit includes: wireless module;

[0010] The input end of the wireless module is configured to receive a power supply signal transmitted by an external device, and the output end of the wireless module forms an output end of the power supply identification circuit.

[0011] Optionally, the power supply identification circuit comprises a voltage detection circuit.

[0012] The input end of the voltage detection circuit is connected with the main power circuit, and the output end of the voltage detection circuit forms an output end of the power supply identification circuit.

[0013] The voltage detection circuit is configured to acquire a voltage signal of the main power circuit and generate the power supply signal according to the voltage signal.

[0014] Optionally, the main power circuit comprises a rectifier unit and a driving unit.

[0015] The first input end of the rectifier unit forms a first input end of the main power circuit, the second input end of the rectifier unit forms a second input end of the main power circuit, the positive output end of the rectifier unit is connected with the positive input end of the driving unit, and the negative output end of the rectifier unit is connected with the negative input end of the driving unit.

[0016] The output end of the driving unit forms an output end of the main power circuit, and the control end of the driving unit forms a control end of the main power circuit.

[0017] Optionally, the input end of the voltage detection circuit comprises a first voltage input end and a second voltage input end.

[0018] The first voltage input end is connected with the first input end of the rectifier unit, and the second voltage input end is connected with the second input end of the rectifier unit; or

[0019] The first voltage input end is connected with the positive output end of the rectifier unit, and the second voltage input end is connected with the negative output end of the rectifier unit.

[0020] Optionally, the driving unit comprises a power switch tube, and the driving unit adjusts the output current or the output voltage of the driving unit by adjusting the conduction state of the power switch tube.

[0021] The input end of the voltage detection circuit comprises a first voltage input end and a second voltage input end.

[0022] The first voltage input end is connected with the drain of the power switch tube, and the second voltage input end is connected with the source of the power switch tube.

[0023] Optionally, the driving unit further comprises a first resistor, and the first resistor is connected in series with the power switch tube.

[0024] The first voltage input end and the second voltage input end are respectively connected with the first end of the first resistor and the second end of the first resistor.

[0025] Optionally, the power supply identification circuit comprises a current detection circuit.

[0026] The input end of the current detection circuit is connected with the main power circuit, and the output end of the current detection circuit forms the output end of the power supply identification circuit.

[0027] The current detection circuit is used for acquiring a current signal of the main power circuit and generating a power supply signal according to the current signal.

[0028] Optionally, the current detection circuit comprises a second resistor and a current detection unit.

[0029] The first input end of the main power circuit is connected with the positive pole of the DC emergency power supply and the zero line of the AC power supply through the second resistor; or

[0030] The second input end of the main power circuit is connected with the negative pole of the DC emergency power supply and the live wire of the AC power supply through the second resistor.

[0031] The first input end and the second input end of the current detection unit are connected with the first end and the second end of the second resistor respectively, and the output end of the current detection unit forms the output end of the current detection circuit.

[0032] In a second aspect, the utility model embodiment provides a LED lamp, including the LED drive device provided by the above embodiment first aspect.

[0033] The utility model embodiment provides a LED drive device and LED lamp. The above -mentioned LED drive device includes: main power circuit, control circuit and power supply identification circuit, wherein, LED drive device is powered by AC power supply or DC emergency power supply, the first input end and the second input end of main power circuit are used for with the positive pole and the negative pole of DC emergency power supply is connected, and the first input end and the second input end of main power circuit are also used for with the zero line and the live wire of AC power supply is connected, the output end of main power circuit is connected with LED lamp series, and the control end of main power circuit is connected with the output end of control circuit, the output end of power supply identification circuit is connected with the input end of control circuit, is used for acquiring the power supply signal of LED drive device, and sends to control circuit, wherein, power supply signal is used for indicating that LED drive device is powered by DC or AC. The utility model embodiment sets up power supply identification circuit and identifies whether the power supply is AC or DC, and can automatically switch power without communicating with the emergency power supply, so that the LED drive device and the emergency power supply only need to be connected with two power supply lines, the wiring is simple, and the use is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0035] Figure 1 is a circuit structure schematic diagram of an LED driving device provided by the embodiments of the present application;

[0036] Figure 2 is a connection relationship schematic diagram of a power supply identification circuit provided by the embodiments of the present application;

[0037] Figure 3 is a connection relationship schematic diagram of another power supply identification circuit provided by the embodiments of the present application;

[0038] Figure 4 is a voltage signal waveform comparison diagram of a front end of a rectifier unit when AC power supply and DC power supply are provided, provided by the embodiments of the present application;

[0039] Figure 5 is a schematic diagram of a voltage detection circuit connected with a front end of a rectifier unit, provided by the embodiments of the present application;

[0040] Figure 6 is a schematic diagram of a voltage detection circuit connected with a rear end of a rectifier unit, provided by the embodiments of the present application;

[0041] Figure 7 is a voltage signal waveform comparison diagram of a rear end of a rectifier unit when AC power supply and DC power supply are provided, provided by the embodiments of the present application;

[0042] Figure 8 is Figure 5 a circuit principle diagram of a voltage detection circuit corresponding to the connection relationship shown in the figure;

[0043] Figure 9 is a schematic diagram of a voltage detection circuit connected with both ends of a power switch tube, provided by the embodiments of the present application;

[0044] Figure 10 is a voltage signal waveform comparison diagram of both ends of a power switch tube when AC power supply and DC power supply are provided, provided by the embodiments of the present application;

[0045] Figure 11 is a schematic diagram of a voltage detection circuit connected with both ends of a first resistor, provided by the embodiments of the present application;

[0046] Figure 12The utility model embodiment provides the voltage signal waveform contrast drawing of first resistance both ends when AC power supply and direct current power supply.

[0047] Figure 13 The utility model embodiment provides the voltage signal waveform contrast drawing of driving unit rear end when AC power supply and direct current power supply.

[0048] Figure 14 The utility model embodiment provides the connection relation schematic diagram of still another power identification circuit.

[0049] Figure 15 The utility model embodiment provides the circuit structure schematic diagram of a current detection circuit.

[0050] Figure 16 The utility model embodiment provides the current signal waveform contrast drawing of main power circuit front end when AC power supply and direct current power supply. DETAILED DESCRIPTION

[0051] In order to make the personnel in the technical field better understand the scheme, the technical scheme in the scheme embodiment will be clearly described below in conjunction with the drawings in the scheme embodiment, obviously, the described embodiment is the embodiment of the scheme part, instead of all the embodiments. Based on the embodiment in the scheme, all other embodiments obtained by the ordinary skill in the art without creative labor should belong to the scope of the scheme protection.

[0052] The term "include" and other any change in the specification and claims of the scheme and above-mentioned drawing, refers to "include but not limited to", the intention is to cover the non-exclusive inclusion, and is not limited to the example listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, and are not used to describe a specific order.

[0053] The implementation of the utility model will be described in detail below in conjunction with specific drawings:

[0054] Figure 1 The utility model embodiment provides a circuit structure schematic diagram of LED drive arrangement. Refer to Figure 1 The LED drive arrangement includes: main power circuit 11, control circuit 12 and power identification circuit 13, wherein, LED drive arrangement is powered by AC power supply or direct current emergency power supply,

[0055] The first input end and the second input end of the main power circuit 11 are used for being connected with the positive pole (+) and the negative pole (-) of the direct current emergency power supply, and the first input end and the second input end of the main power circuit 11 are also used for being connected with the zero line (N) and the live wire (L) of the alternating current power supply, the output end of the main power circuit 11 is connected with the LED lamp string, and the control end of the main power circuit 11 is connected with the output end of the control circuit 12;

[0056] The output end of the power supply identification circuit 13 is connected with the input end of the control circuit 12, used for acquiring the power supply signal of the LED driving device and sending to the control circuit 12;

[0057] The power supply signal is used for indicating that the LED driving device is powered by direct current or alternating current.

[0058] The LED driving device provided by the embodiment of the utility model sets power supply identification circuit 13, detects whether the LED driving device is powered by direct current or alternating current, automatically adjusts power, need not communicate with direct current emergency power supply, only need to connect two power supply lines, wiring is simple, effectively reduce the risk of wiring error, application is more convenient.

[0059] For example, when the power supply signal indicates that the LED driving device is powered by direct current, the LED driving device outputs preset current to power the LED lamp string, and no other additional dimming signal line is needed to control the brightness of the LED lamp string.

[0060] In a possible implementation, referring to Figure 2 , the power supply identification circuit 13 can include a wireless module 131.

[0061] The input end of the wireless module 131 is used for receiving the power supply signal sent by the external device, and the output end of the wireless module 131 forms the output end of the power supply identification circuit 13.

[0062] In the embodiment of the utility model, the power supply identification circuit 13 can be a wireless module 131, which is used for communicating with the wireless module 131 through an external device (a mobile phone or a remote controller, etc.), and sending a power supply signal.

[0063] For example, the external device is a remote controller, when the key 1 is pressed, the power supply signal is the first level, which is used for indicating that the LED driving device is powered by direct current, and when the key 2 is pressed, the power supply signal is the second level, which is used for indicating that the LED driving device is powered by alternating current. Therefore, the main power circuit 11 adaptively adjusts the power to meet the power supply demand.

[0064] In a possible implementation, referring to Figure 3 , the power supply identification circuit 13 can include a voltage detection circuit 132.

[0065] The input end of the voltage detection circuit 132 is connected with the main power circuit 11, and the output end of the voltage detection circuit 132 forms the output end of the power supply identification circuit 13.

[0066] The voltage detection circuit 132 is used for acquiring a voltage signal of the main power circuit 11, and generating a power supply signal according to the voltage signal.

[0067] Since the waveform of the alternating current power supply is obviously different from the waveform of the direct current emergency power supply, the voltage signals of each part, each element and the like of the main power circuit 11 are different when the direct current power supply and the alternating current power supply. Figure 4 For example, the waveform of the voltage signal of the input end of the main power circuit 11 is a sine wave when the alternating current power supply, and the waveform of the voltage signal of the input end of the main power circuit 11 is a straight line when the direct current power supply.

[0068] Based on this, the voltage detection circuit 132 is used for detecting the voltage signals of each part of the main power circuit 11 in the application, and the power supply of the main power circuit 11 is identified based on the obvious difference between the voltage signals when the alternating current power supply and the direct current power supply.

[0069] In a possible implementation, referring to Figure 5 and Figure 6 The main power circuit 11 can include a rectifier unit 111 and a driving unit 112.

[0070] The first input end of the rectifier unit 111 forms the first input end of the main power circuit 11, the second input end of the rectifier unit 111 forms the second input end of the main power circuit 11, the positive output end of the rectifier unit 111 is connected with the positive input end of the driving unit 112, and the negative output end of the rectifier unit 111 is connected with the negative input end of the driving unit 112.

[0071] The output end of the driving unit 112 forms the output end of the main power circuit 11, and the control end of the driving unit 112 forms the control end of the main power circuit 11.

[0072] Since the main power circuit 11 is compatible with the direct current power supply and the alternating current power supply, the main power circuit 11 includes the rectifier unit 111 and the driving unit 112 in the embodiment of the application, and the rectifier unit 111 is used for rectification and can be compatible with the direct current power supply and the alternating current power supply at the same time.

[0073] For example, the rectifier unit 111 can be a full-bridge rectifier.

[0074] In a possible implementation, referring to Figure 5 and Figure 6 The input end of the voltage detection circuit 132 includes a first voltage input end and a second voltage input end.

[0075] The first voltage input end is connected with the first input end of the rectifier unit 111, and the second voltage input end is connected with the second input end of the rectifier unit 111.

[0076] The first voltage input end is connected with the positive output end of the rectifier unit 111, and the second voltage input end is connected with the negative output end of the rectifier unit 111.

[0077] Figure 4 The voltage signal waveform comparison diagram of the front end of the rectifier unit 111 in the alternating current power supply and the direct current power supply is shown, and the waveform difference is obvious. The voltage detection circuit 132 can be connected with the front end of the rectifier unit 111, and the power supply of the main power circuit 11 is identified based on the waveform difference, and the power supply signal is generated.

[0078] At the same time, Figure 7 The voltage signal waveform comparison diagram of the rear end of the rectifier unit 111 in the alternating current power supply and the direct current power supply is shown, and the waveform difference is also very obvious. The voltage detection circuit 132 can be connected with the rear end of the rectifier unit 111, and the power supply of the main power circuit 11 is identified based on the waveform difference, and the power supply signal is generated.

[0079] When the voltage detection circuit 132 is connected with the front end of the rectifier unit 111, the corresponding Figure 5 The voltage detection circuit 132 can include a first unidirectional conduction element, a second unidirectional conduction element, a current limiting resistor, a pull-down resistor and a first optocoupler; the specific connection relationship is shown in Figure 8 .

[0080] When the alternating current power supply, the first unidirectional conduction element and the second unidirectional conduction element are alternately conducted in the positive and negative half cycles, and the voltage detection circuit 132 outputs a similar rectangular wave; when the direct current power supply, the first unidirectional conduction element is continuously conducted, and a direct current wave is output. The control circuit 12 can determine the current alternating current power supply or direct current power supply according to the voltage at the output end of the voltage detection circuit 132.

[0081] It should be noted that the specific determination method of the control circuit 12 is a conventional technical means, which is not within the protection scope of the present application. The improvement of the present application lies in the improvement of the hardware.

[0082] Similarly, when the voltage detection circuit 132 is connected with the rear end of the rectifier unit 111, the voltage detection circuit 132 can be set according to the actual application requirement, which is a conventional technical means in the field, and will not be described here.

[0083] In a possible implementation, referring to Figure 9 The driving unit 112 can include a power switch tube Q1; the driving unit 112 adjusts the output current or output voltage of the driving unit 112 by adjusting the conduction state of the power switch tube Q1.

[0084] The input terminals of the voltage detection circuit 132 include: a first voltage input terminal and a second voltage input terminal;

[0085] The first voltage input terminal is connected to the drain of the power switch Q1, and the second voltage input terminal is connected to the source of the power switch Q1.

[0086] When the drive unit 112 regulates the voltage or current by adjusting the conduction state of the power switch Q1, the reference... Figure 10 The voltage difference between the source and drain of power switch Q1 also differs significantly under AC and DC power supply conditions. Based on this, refer to... Figure 9 The voltage difference between the source and drain of the power switch Q1 can be detected by the voltage detection circuit 132 to determine whether it is powered by DC or AC. Figure 9 The voltage detection circuit 132 can be configured according to actual application requirements, which is a conventional technical means in this field, and will not be described in detail here.

[0087] In one possible implementation, refer to Figure 11 The drive unit 112 may further include: a first resistor R1; the first resistor R1 is connected in series with the power switch Q1;

[0088] The first voltage input terminal and the second voltage input terminal are respectively connected to the first terminal and the second terminal of the first resistor R1.

[0089] When the power switch Q1 is connected in series with a resistor, the voltage difference across the first resistor R1 also shows a significant difference. See the attached diagram for details. Figure 12 Based on this, refer to Figure 11 The voltage difference across the first resistor R1 can be detected by the voltage detection circuit 132 to determine whether it is DC or AC power supply.

[0090] correspond Figure 11 The voltage detection circuit 132 can be configured according to actual application requirements, which is a conventional technical means in this field, and will not be described in detail here.

[0091] In a further embodiment, when the driving unit 112 is an APFC constant current drive, the voltage reference at the output terminal of the driving unit 112 is... Figure 13 When powered by AC or DC, the voltage at the output terminal of the drive unit 112 shows a significant difference. The input terminal of the voltage detection circuit 132 is connected to the output terminal of the APFC constant current drive. By detecting the voltage at the output terminal of the APFC constant current drive, it determines whether the power supply is DC or AC. Similarly, the circuit of the voltage detection circuit 132 can be configured according to actual application requirements, which is a conventional technical means in this field and will not be described in detail here.

[0092] It should be noted that the voltage signals detected by the voltage detection circuit 132 include, but are not limited to, the types mentioned above. It can also identify the power supply by detecting the voltage signals of other parts in the main power circuit 11, which will not be listed here.

[0093] The above embodiment identifies AC or DC power supply by detecting the voltage signals at various points in the main power circuit 11. Similarly, when the main power circuit 11 is powered by DC or AC, the current signals at various points will also show obvious differences, and the power supply identification circuit 13 can also identify DC or AC power supply by detecting the current signals at various points in the main power circuit 11.

[0094] Based on this, in one possible implementation, refer to Figure 14 The power identification circuit 13 may include: a current detection circuit 133;

[0095] The input terminal of the current detection circuit 133 is connected to the main power circuit 11, and the output terminal of the current detection circuit 133 forms the output terminal of the power identification circuit 13.

[0096] The current detection circuit 133 is used to acquire the current signal of the main power circuit 11 and generate a power supply signal based on the current signal.

[0097] In one possible implementation, refer to Figure 15 The current detection circuit 133 may include: a second resistor R2 and a current detection unit 1331;

[0098] The first input terminal of the main power circuit 11 is connected to the positive terminal of the DC emergency power supply and the neutral wire of the AC power supply through the second resistor R2; or

[0099] The second input terminal of the main power circuit 11 is connected to the negative terminal of the DC emergency power supply and the live wire of the AC power supply through the second resistor R2.

[0100] The first input terminal and the second input terminal of the current detection unit 1331 are respectively connected to the first terminal and the second terminal of the second resistor R2, and the output terminal of the current detection unit 1331 forms the output terminal of the current detection circuit 133.

[0101] When the main power circuit 11 is powered by DC or AC, the current signal reference at the input terminal is... Figure 16 ,Depend on Figure 16 It is evident that there are significant differences between AC and DC power supply.

[0102] Based on this, this application connects a second resistor R2 in series at the front end of the main power circuit 11 to convert the current signal into a voltage signal for extraction, and identifies whether it is DC or AC power supply by detecting the current signal at the front end of the main power circuit 11.

[0103] correspondFigure 15 The circuit of the current detection circuit 133 can be set according to actual application requirements, which is a routine technical means in the art, and will not be described here in detail.

[0104] It should be noted that the current signal detected by the current detection circuit 133 includes but is not limited to the above, and can also be used to identify power supply by detecting the current signal of other parts in the main power circuit 11, which will not be enumerated here.

[0105] In one possible implementation, the LED driving device can further include an induction circuit;

[0106] The induction circuit is connected with the control circuit 12 and is used to obtain the control behavior of the user.

[0107] The control circuit 12 obtains the control behavior of the user through the induction circuit and turns on or off the lighting lamp or adjusts the lighting lamp based on the control behavior of the user.

[0108] Corresponding to the above-mentioned embodiments, the utility model embodiment further provides an LED lamp, which comprises the LED driving device provided by the above-mentioned embodiments and has the advantages of the above-mentioned LED driving device, and will not be described here in detail.

[0109] The above-mentioned LED lamp can be directly connected with the zero fire line of the alternating power supply or the positive and negative poles of the emergency power supply, does not need to communicate with the emergency power supply, has simple wiring and convenient operation.

[0110] The above-mentioned embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that the technical solutions recorded in the above-mentioned embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An LED driver device, characterized in that, include: The system includes a main power circuit, a control circuit, and a power identification circuit; wherein the LED driver is powered by an AC power supply or a DC emergency power supply. The first and second input terminals of the main power circuit are used to connect to the positive and negative terminals of the DC emergency power supply. The first and second input terminals of the main power circuit are also used to connect to the neutral and live wires of the AC power supply. The output terminal of the main power circuit is connected to the LED string. The control terminal of the main power circuit is connected to the output terminal of the control circuit. The output terminal of the power identification circuit is connected to the input terminal of the control circuit, and is used to obtain the power supply signal of the LED driver and send it to the control circuit. The power supply signal is used to indicate whether the LED driver is powered by DC or AC. The power identification circuit includes: a wireless module; the input terminal of the wireless module is used to receive the power supply signal sent by an external device, and the output terminal of the wireless module forms the output terminal of the power identification circuit; or The power identification circuit includes: a voltage detection circuit; the input terminal of the voltage detection circuit is connected to the main power circuit, and the output terminal of the voltage detection circuit forms the output terminal of the power identification circuit; the voltage detection circuit is used to acquire the voltage signal of the main power circuit and generate the power supply signal according to the voltage signal; the main power circuit includes: a rectifier unit and a driver unit; the first input terminal of the rectifier unit forms the first input terminal of the main power circuit, the second input terminal of the rectifier unit forms the second input terminal of the main power circuit, the positive output terminal of the rectifier unit is connected to the positive input terminal of the driver unit, and the negative output terminal of the rectifier unit is connected to the negative input terminal of the driver unit; the output terminal of the driver unit forms the output terminal of the main power circuit, and the control terminal of the driver unit forms the control terminal of the main power circuit; the input terminal of the voltage detection circuit includes: a first voltage input terminal and a second voltage input terminal; the first voltage input terminal is connected to the positive output terminal of the rectifier unit, and the second voltage input terminal is connected to the negative output terminal of the rectifier unit; or The power identification circuit includes: a current detection circuit; the input terminal of the current detection circuit is connected to the main power circuit, and the output terminal of the current detection circuit forms the output terminal of the power identification circuit; the current detection circuit is used to acquire the current signal of the main power circuit and generate the power supply signal based on the current signal.

2. The LED driving device as described in claim 1, characterized in that, The driving unit includes a power switch transistor; the driving unit adjusts the output current or output voltage of the driving unit by adjusting the conduction state of the power switch transistor. The input terminals of the voltage detection circuit include: a first voltage input terminal and a second voltage input terminal; The first voltage input terminal is connected to the drain of the power switch transistor, and the second voltage input terminal is connected to the source of the power switch transistor.

3. The LED driving device as described in claim 2, characterized in that, The driving unit further includes: a first resistor; the first resistor is connected in series with the power switch transistor; The first voltage input terminal and the second voltage input terminal are respectively connected to the first terminal and the second terminal of the first resistor.

4. The LED driving device as described in claim 1, characterized in that, The current detection circuit includes: a second resistor and a current detection unit; The first input terminal of the main power circuit is connected to the positive terminal of the DC emergency power supply and the neutral wire of the AC power supply through the second resistor; or The second input terminal of the main power circuit is connected to the negative terminal of the DC emergency power supply and the live wire of the AC power supply through the second resistor. The first input terminal and the second input terminal of the current detection unit are respectively connected to the first terminal and the second terminal of the second resistor, and the output terminal of the current detection unit forms the output terminal of the current detection circuit.

5. An LED light, characterized in that, Includes the LED driving device as described in any one of claims 1 to 4.

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