CN204442771U - Safety switching apparatus, general-purpose type light-emitting diode lamp tube and power-supply system thereof - Google Patents

Abstract

The utility model discloses a kind of safety switching apparatus, general-purpose type light-emitting diode lamp tube and power-supply system thereof, wherein, general-purpose type light-emitting diode lamp tube comprises a light-emitting diode light bar, a power supply change-over device and a safety switching apparatus.This power supply change-over device changes an external power source to provide the driving power needed for this light-emitting diode light bar.This safety switching apparatus connects this light-emitting diode light bar and this power supply change-over device.When this external power source is powered for this light-emitting diode light bar, after guaranteeing the switch module conducting in this safety switching apparatus, this external power source drives this light-emitting diode light bar shinny.

Description

Safety switch device, general-purpose light-emitting diode lamp tube and its power supply system

technical field

The utility model relates to a light-emitting diode lamp tube with a safety switch mechanism and its power supply system, in particular to a safety switch device, a general-purpose light-emitting diode lamp tube with the safety switch device and a power supply system for the lamp tube.

Background technique

During the installation and disassembly process of the LED lamp tube, when the user installs one end of the LED lamp tube to the corresponding lamp holder, it is easy for the user to hold the other end of the LED lamp tube at the same time and cause conductive accidental contact , which will seriously affect the personal safety of users.

In addition, the existing light-emitting diode tubes are usually suitable for lamp holder power supplies of different types and different voltage levels, such as inductive ballasts or electronic ballasts, or even lamp holders without ballasts (noneballast). Users need to purchase different light-emitting diode lamps to be able to adapt to different lamp socket power sources. This will not only increase additional costs, but also reduce the practicality and convenience of use.

Therefore, how to design a safety switch device, a general-purpose light-emitting diode lamp with the safety switch device and a power supply system of the lamp, so as to realize the safety protection of the electric shock prevention function, improve the convenience and practicability of operation, and Saving the design cost is a big problem to be overcome and solved by the utility modeler of this case.

Utility model content

An object of the present invention is to provide a safety switch device to overcome the problems in the prior art. The safety switch device is connected with a LED light bar and a power conversion device. The power conversion device converts an external power source to provide the driving power required by the LED light bar. The safety switch device includes a switch module, a full bridge conversion unit, a trigger circuit, a starting capacitor and a circuit diode. The switch module has a first end, a second end and a trigger end. The full-bridge conversion unit has a first power supply terminal, a second power supply terminal, a first output terminal and a second output terminal; wherein the first output terminal is connected to the second terminal of the switch module, and the second output terminal terminal is connected to the first terminal of the switch module, and the first power supply terminal is connected to the LED light bar. The trigger circuit at least includes a diode, a transformer and a trigger holding unit. The diode has an anode terminal and a cathode terminal. The transformer has a first primary end, a second primary end, a first secondary end, and a second secondary end; wherein the first primary end is connected to the second power supply end, and the second primary end is connected to the external power supply, the second secondary terminal is connected to the anode terminal. The trigger maintaining unit is connected to the first secondary terminal, the cathode terminal, the second terminal of the switch module, and the trigger terminal. The startup capacitor has a first terminal and a second terminal; wherein the first terminal is connected to the first power supply terminal of the full-bridge conversion unit, and the second terminal is connected to the second power supply terminal of the full-bridge conversion unit and the The first primary terminal of the transformer forms a first branch circuit. The branch diode has an anode terminal and a cathode terminal; wherein the anode terminal is connected to the second output terminal of the full-bridge conversion unit, and the cathode terminal is connected to the first terminal of the switch module to form a second branch circuit . Wherein when the external power supplies power to the LED light bar, the trigger maintaining unit generates the trigger power required by the switch module to ensure that the external power supply drives the LED light bar to light up after the switch module is turned on.

Another object of the present invention is to provide a general-purpose light-emitting diode lamp to overcome the problems in the prior art. The general-purpose LED lamp tube includes an LED light bar, a power conversion device and a safety switch device. The power conversion device is used for converting an external power source to provide the driving power required by the LED light bar. The safety switch device is connected with the LED light bar and the power conversion device. The safety switch device includes a switch module, a full bridge conversion unit, a trigger circuit, a starting capacitor and a circuit diode. The switch module has a first end, a second end and a trigger end. The full-bridge conversion unit has a first power supply terminal, a second power supply terminal, a first output terminal and a second output terminal; wherein the first output terminal is connected to the second terminal of the switch module, and the second output terminal terminal is connected to the first terminal of the switch module, and the first power supply terminal is connected to the LED light bar. The trigger circuit at least includes a diode, a transformer and a trigger holding unit. The diode has an anode terminal and a cathode terminal. The transformer has a first primary end, a second primary end, a first secondary end, and a second secondary end; wherein the first primary end is connected to the second power supply end, and the second primary end is connected to the external power supply, the second secondary terminal is connected to the anode terminal. The trigger maintaining unit is connected to the first secondary terminal, the cathode terminal, the second terminal of the switch module, and the trigger terminal. The startup capacitor has a first terminal and a second terminal; wherein the first terminal is connected to the first power supply terminal of the full-bridge conversion unit, and the second terminal is connected to the second power supply terminal of the full-bridge conversion unit and the The first primary terminal of the transformer forms a first branch circuit. The branch diode has an anode terminal and a cathode terminal; wherein the anode terminal is connected to the second output terminal of the full-bridge conversion unit, and the cathode terminal is connected to the first terminal of the switch module to form a second branch circuit wherein when the external power supply supplies power to the LED light bar, the trigger maintenance unit generates the trigger power required by the switch module to ensure that the external power supply drives the LED light bar to light up after the switch module is turned on.

Yet another object of the present invention is to provide a power supply system for a general-purpose LED lamp to overcome the problems in the prior art. The power supply system of the general LED lamp tube includes a lamp holder and a general LED lamp tube. The lamp socket provides an external power supply. The general-purpose LED lamp tube has a first end on the first side, a second end on the first side, a first end on the second side, and a second end on the second side. One end, the second end on the first side, the first end on the second side, and the second end on the second side are assembled on the lamp holder. The general-purpose LED lamp tube includes an LED light bar and a safety switch device. The power conversion device is used to convert the external power to provide the driving power required by the LED light bar. The safety switch device is connected with the LED light bar and the power conversion device. The safety switch device includes a switch module, a full bridge conversion unit, a trigger circuit, a starting capacitor and a circuit diode. The switch module has a first end, a second end and a trigger end. The full-bridge conversion unit has a first power supply terminal, a second power supply terminal, a first output terminal and a second output terminal; wherein the first output terminal is connected to the second terminal of the switch module, and the second output terminal terminal is connected to the first terminal of the switch module, and the first power supply terminal is connected to the LED light bar. The trigger circuit at least includes a diode, a transformer and a trigger holding unit. The diode has an anode terminal and a cathode terminal. The transformer has a first primary end, a second primary end, a first secondary end, and a second secondary end; wherein the first primary end is connected to the second power supply end, and the second primary end is connected to the external power supply, the second secondary terminal is connected to the anode terminal. The trigger maintaining unit is connected to the first secondary terminal, the cathode terminal, the second terminal of the switch module, and the trigger terminal. The startup capacitor has a first terminal and a second terminal; wherein the first terminal is connected to the first power supply terminal of the full-bridge conversion unit, and the second terminal is connected to the second power supply terminal of the full-bridge conversion unit and the The first primary terminal of the transformer forms a first branch circuit. The branch diode has an anode terminal and a cathode terminal; wherein the anode terminal is connected to the second output terminal of the full-bridge conversion unit, and the cathode terminal is connected to the first terminal of the switch module to form a second branch circuit ; Wherein when the general-purpose LED lamp tube is connected to the lamp holder, and the external power supply supplies power to the LED light bar, the trigger maintenance unit generates the trigger power required by the switch module to ensure that the switch module conducts After being turned on, the external power supply drives the LED light bar to light up.

In order to further understand the technology, means and effects that the utility model adopts to achieve the predetermined purpose, please refer to the following detailed description and accompanying drawings of the utility model, and believe that the purpose, features and characteristics of the utility model can be obtained from this For an in-depth and specific understanding, the attached drawings are only for reference and illustration, and are not intended to limit the present invention.

Description of drawings

Fig. 1 is a circuit block diagram of a safety switch device of the present invention applied to a light-emitting diode lamp;

Fig. 2 is the circuit block diagram of this safety switch device of the utility model;

Fig. 3 is the circuit block diagram of the first embodiment of the safety switch device of the present invention;

4 is a schematic diagram of the operation of the first embodiment of the safety switch device of the present invention;

Fig. 5 is the circuit block diagram of the second embodiment of the safety switch device of the present invention;

Fig. 6 is a schematic diagram of a general-purpose light-emitting diode lamp tube of the present invention;

7 is a circuit block diagram of a power conversion device of the present invention;

8 is a schematic diagram of the operation of the first embodiment of the power conversion device of the present invention;

9 is a schematic diagram of the operation of the second embodiment of the power conversion device of the present invention;

Fig. 10 is a detailed circuit block diagram of the power conversion device of the present invention;

Fig. 11 is a schematic diagram of the first application embodiment of the general-purpose light-emitting diode lamp tube of the present invention;

Fig. 12 is a schematic diagram of the second application embodiment of the general-purpose light-emitting diode lamp tube of the present invention;

Fig. 13 is a schematic diagram of the third application embodiment of the general-purpose light-emitting diode lamp tube of the present invention;

Fig. 14 is a schematic diagram of the fourth application embodiment of the general-purpose light-emitting diode lamp of the present invention;

Fig. 15 is a circuit diagram of an electronic virtual filament of the utility model;

FIG. 16 is a detailed circuit diagram of the general-purpose LED lamp of the present invention.

Explanation of reference signs: Vx-external power supply; 10-universal LED lamp tube; 1-safety switch device; 2-LED light bar; 3-power conversion device; 4-virtual filament circuit; 11-switch module; 12 -full bridge conversion unit; 13-trigger circuit; 14-start capacitor; 15-branch diode; 16-voltage suppression diode; 20-electronic ballast; 30-inductive ballast; 31-short circuit element; 32 - rectifier filter circuit; 34-DC to DC conversion circuit; 36-frequency selection circuit; 362-transistor switch; 41-detection capacitor; 42-detection resistor; 111-first end; 112-second end; 113-trigger end 121-first power supply terminal; 122-second power supply terminal; 123-first output terminal; 124-second output terminal; 131-diode; 132-transformer; ; R _f - filter resistance; C _f - filter capacitor; 141 - the first end; 142 - the second end; A primary end; P2-the second primary end; S1-the first secondary end; S2-the second secondary end; CON1-the first end of the first side; CON2-the second end of the first side; CON3-the second end The first end of the two sides; CON4-the second end of the second side; Br1-the first branch; Br2-the second branch; Lp1-the first path; Lp2-the second path; Lp3-the first high-frequency power supply loop; Lp4-the second high-frequency power supply loop; Lp5-the first low-frequency power supply loop; Lp6-the second low-frequency power supply loop.

Detailed ways

Now relevant technical content and detailed description of the present utility model, cooperate drawing description as follows.

Please refer to FIG. 1 , which is a circuit block diagram of a safety switch device of the present invention applied to an LED lamp. The safety switch device 1 is connected with an LED light bar (LED light bar) 2 and a power conversion device 3 . Wherein the light emitting diode light bar 2 has a plurality of light emitting diode particles (LEDs, hereinafter referred to as light emitting diodes), the plurality of light emitting diodes can be connected in series, in parallel or in series and parallel, and can be designed according to actual application requirements, so the plurality of light emitting diodes The electrical connection relationship is not used to limit the technical features of the present utility model.

Specifically, the circuit structure formed by the power conversion device 3, the LED light bar 2 and the safety switch device 1 is installed in a light tube (details will be described later), and the two ends of the light tube are installed on a In the lamp holder, an external power supply Vx is used to drive the plurality of LEDs on the LED strip 2 to light up. In addition, the LED tube of the present invention also includes a virtual filament circuit 4 . The operation principle of the virtual filament circuit 4 will be described in detail later.

Please refer to FIG. 16 which is a detailed circuit diagram of the light emitting diode lamp power supply of the present invention. Fig. 16 discloses the complete circuit structure of the safety switch device 1, the LED light bar 2, the power conversion device 3 and the virtual filament circuit 4 in the LED lamp tube of the present invention. The ends CON1-CON4 on both sides are installed on the lamp holder, and the lamp tube can be started and used.

The integral light-emitting diode tube design of the present utility model can achieve the following functions:

1. Regardless of whether the light-emitting diode tube is an electronic ballast tube, an inductive ballast tube or a non-ballast tube, it can be directly replaced without changing the circuit structure;

2. Through the safety switch device 1 provided by the light-emitting diode lamp tube, the safety of installation live operation can be ensured, so as to meet the requirements of international safety standards. As for the above functions, it will be described in the following description with reference to the drawings.

Please refer to FIG. 2 which is a circuit block diagram of the safety switch device of the present invention. The safety switch device 1 is connected with an LED light bar 2 and a power conversion device 3 . The power conversion device 3 converts an external power Vx to provide the driving power required by the LED light bar 2 . The safety switch device 1 includes a switch module 11 , a full-bridge conversion unit 12 and a trigger circuit 13 .

The switch module 11 has a first end 111 , a second end 112 and a trigger end 113 . The full bridge conversion unit 12 has a first power terminal 121 , a second power terminal 122 , a first output terminal 123 and a second output terminal 124 . Wherein the first output terminal 123 is connected to the second terminal 112 of the switch module 11, the second output terminal 124 is connected to the first terminal 111 of the switch module 11, and the first power supply terminal 121 is connected to the LED light bar 2 .

The trigger circuit 13 at least includes a diode 131 , a transformer 132 and a trigger holding unit 133 . The diode 131 has an anode terminal and a cathode terminal. The transformer 132 is substantially a high frequency current transformer. The transformer 132 has a first primary terminal P1 , a second primary terminal P2 , a first secondary terminal S1 and a second secondary terminal S2 . The first primary terminal P1 is connected to the second power supply terminal 122 , the second primary terminal P2 is connected to the external power supply Vx, and the second secondary terminal S2 is connected to the anode terminal. The trigger holding unit 133 is connected to the first secondary terminal S1 , the cathode terminal, the second terminal 112 and the trigger terminal 113 of the switch module 11 . Wherein when the external power supply Vx supplies power to the LED light bar 2, the trigger maintaining unit 133 generates the trigger power required by the switch module 11 to ensure that the external power supply Vx drives the LED after the switch module 11 is turned on. Light bar 2 lights up. In other words, in the above-mentioned circuit of the safety switch device, the switch module 11 is firstly turned on and closed by high-frequency current, and then the current of the high-frequency current transformer is further maintained, so as to realize the guaranteed installation provided by the safety switch device 1 . The safety function of live operation.

In this way, by applying the safety switch device 1 to the operation of the light-emitting diode tube, it is ensured that the switch module 11 is turned on only after the light-emitting diode tube is fully plugged into the lamp socket, and then the external power supply Vx drives to emit light. The LED light bar 2 emits light, so it can prevent the user from getting an electric shock when installing the LED light tube, so as to ensure the personal safety of the user. As for the operation of the safety switch device 1 applied to the light-emitting diode tube, it will be described in detail later.

Please refer to FIG. 3 , which is a circuit block diagram of the first embodiment of the safety switch device of the present invention. In the first embodiment, the safety switch device 1 includes a starting capacitor 14 and a circuit diode 15 in addition to the aforementioned switch module 11 , the full-bridge conversion unit 12 and the trigger circuit 13 . Wherein, the capacitance value of the starting capacitor 14 is between 470×10 −12 Farads and 2.2×10 −9 Farads.

The startup capacitor 14 has a first terminal 141 and a second terminal 142 . Wherein the first end 141 is connected to the first power end 121 of the full-bridge conversion unit 12, and the second end 142 is connected to the second power end 122 of the full-bridge conversion unit 12 and the first primary end of the transformer 132. P1 to form a first branch Br1. The branch diode 15 has an anode terminal 151 and a cathode terminal 152 . The anode terminal 151 is connected to the second output terminal 124 of the full-bridge conversion unit 12 , and the cathode terminal 152 is connected to the first terminal 111 of the switch module 11 to form a second branch Br2 .

In this embodiment, the switch module 11 includes at least one switch unit, and at least the switch unit has the first terminal 111 , the second terminal 112 and the trigger terminal 113 . The trigger holding unit 133 includes at least one resistor-capacitor group, and at least the resistor-capacitor group is connected in series by a resistor 1331 and a capacitor 1332 to form a first connection end, a second connection end and a common connection end. The first connection terminal is connected to the cathode terminal of the diode 131 , the second connection terminal is connected to at least the second terminal 112 of the switch unit, and the common terminal is connected to at least the trigger terminal 113 of the switch unit. It is worth mentioning that the number of the resistor-capacitor groups is equal to the number of the switch units. In this embodiment, the number of the switch units is three, so the number of the resistor-capacitor groups is also corresponding to three groups.

In practical applications, usually for the safety consideration of insulation withstand voltage, a series structure of multiple switching units is adopted. In addition, the switching unit is preferably a silicon controlled rectifier (silicon controlled rectifier, SCR), therefore, the first terminal 111, the second terminal 112 and the trigger terminal 113 are respectively the anode (anode, SCR) of the silicon controlled rectifier. A), cathode (cathode, K) and gate (gate, G).

Please refer to FIG. 4 , which is an operation diagram of the first embodiment of the safety switch device of the present invention. For convenience of description, in this embodiment, the switch module 11 has one switch unit as an example. In addition, it is also assumed that the external power supply Vx is an AC power supply. However, practical application is not limited by the above conditions.

When the external power supply Vx supplies power to the LED light bar 2 in a positive half cycle, the external power supply Vx first charges the starting capacitor 14 to establish a charging voltage, and the charging voltage is conducted through the first branch Br1 and the transformer 132 Through the diode 131 , a trigger voltage is established through the resistor and capacitor group of the trigger maintaining unit 133 , and the switch module 11 is triggered through the trigger terminal 113 , and then the switch module 11 is turned on. The schematic diagram of the above actions can be shown as a first path Lp1 in FIG. 4 .

It is worth mentioning that since the capacitance value of the starting capacitor 14 is small, as mentioned above, the capacitance value is between 470×10-12 farads and 2.2×10-9 farads. Therefore, when the frequency is higher, the starting capacitor The impedance of 14 is also smaller. Therefore, under high frequency operation, the charging voltage established by the external power supply Vx charging the startup capacitor 14 turns on the switch module 11 through the first branch Br1.

Then, the external power Vx passes through the full-bridge conversion unit 12 and the second branch Br2 , so that the external power Vx drives the LED strip 2 to light up. The schematic diagram of the above actions can be shown as a second path Lp2 in FIG. 4 . It is worth mentioning that, before the switch module 11 is turned on, the external power supply Vx cannot transmit power through the second branch Br2. Therefore, if the safety switch device 1 is a switch, the safety switch device 1 It is turned off (turned off) state. In other words, the condition for the external power supply Vx to transmit power through the safety switch device 1 is that the safety switch device 1 is in a conduction state, that is, in the positive half-cycle operation, the external power supply Vx needs to pass through the first path first After Lp1 triggers and turns on the switch module 11 , the transmission path of the external power Vx is provided via the second path Lp2 .

In this way, the main technical features of this embodiment can be realized: "When the external power supply Vx supplies power to the LED light bar 2, the trigger maintaining unit 133 generates the trigger power required by the switch module 11 to ensure that the switch module 11 is turned on, the external power supply Vx drives the light-emitting diode light bar 2 to light up." In this way, it can be ensured that the external power supply Vx will not supply power to turn on the light tube before the user installs the light tube to the lamp holder. Therefore, it can prevent the user from getting an electric shock when installing the light-emitting diode lamp tube, so as to ensure the personal safety of the user.

In addition, when the external power supply Vx operates in the negative half cycle, although the voltage provided by the external power supply Vx via the secondary side of the transformer 132 is reverse-biased to cut off the diode 131, however, due to the resistance of the trigger holding unit 133 The voltage provided by the capacitor is sufficient to keep the switch module 11 turned on during the negative half cycle. Therefore, once the external power supply Vx returns to the positive half cycle operation, it will continue to trigger and turn on the switch through the first path Lp1. module 11, and a transmission path for providing power through the second path Lp2.

Please refer to FIG. 5 , which is a circuit block diagram of the second embodiment of the safety switch device of the present invention. In the second embodiment, the safety switch device 1 further includes a voltage suppression diode 16 in addition to the aforementioned switch module 11 , the full-bridge conversion unit 12 and the trigger circuit 13 . Wherein the voltage suppression diode 16 can be a transient voltage suppressor (transient voltage suppresser, TVS). The voltage suppression diode 16 has a first end 161 and a second end 162; wherein the first end 161 is connected to the second output end 124 of the full bridge conversion unit 12 and the first end 111 of the switch module 11, The second end 162 is connected to the trigger holding unit 133 .

Moreover, the switch module 11 includes a switch unit, and the switch unit has the first terminal 111 , the second terminal 112 and the trigger terminal 113 . The trigger holding unit 133 mainly includes a Zener diode and a resistor-capacitor set. The resistor-capacitor group is connected in parallel by a resistor and a capacitor to form a first connection end and a second connection end, and the resistor-capacitor group is connected in parallel with the Zener diode. The first connection terminal is connected to the second terminal 162 of the voltage suppression diode 16 and the trigger terminal 113 of the switch module 11 , and the second connection terminal is connected to the second terminal 112 of the switch unit.

When the external power supply Vx supplies power to the LED light bar 2, the high ignition voltage generated by the ballast in the power supply system triggers and turns on the switch module 11, so that the external power supply Vx drives the LED light The bar 2 lights up; wherein the voltage suppression diode 16 suppresses the high voltage value that triggers the switch module 11, thereby reducing the high energy generated at the moment of ignition soft breakdown. It is worth mentioning that in practical applications, the voltage suppression diode 16 may not need to be used, however, relatively, it needs to be considered that when there is no voltage suppression diode 16 to suppress the ignition high voltage, the softness of the switch module 11 used The condition of the breakdown current, or adjust the output characteristics of the ballast, in response to the application without the voltage suppression diode 16 installed.

Please refer to FIG. 6 , which is a schematic diagram of a general-purpose light-emitting diode tube of the present invention. The general-purpose LED lamp tube 10 includes an LED light bar 2 , a power conversion device 3 and a safety switch device 1 . Wherein the universal LED tube can be a T8 LED tube (T8-LED Tube), however, it is not limited thereto. It is worth mentioning that although the power conversion device 3, the LED light bar 2 and the safety switch device 1 shown in FIG. In order to fully arrange a plurality of light-emitting diode particles on a surface of a printed circuit board (PCB) or a flexible printed circuit board (flexible printed circuit, FPC), so that the light-emitting diode tube The illumination area is large and the luminous efficiency is high. Moreover, the power conversion device 3 and the safety switch device 1 are disposed on the other surface of the substrate to provide power conversion and safe power supply operations.

It is worth mentioning that the so-called "universal type" of the general-purpose light-emitting diode lamp of the present invention means that the light-emitting diode proposed by the present invention can be suitable for matching with low-frequency (50Hz-60Hz) lighting inductive townships. Magnetic ballast or high frequency (20kHz ~ 60kHz) electronic ballast for instantaneous lighting, even configuration without ballast (none ballast), is also applicable. Refer to Figures 11 to 13 and their corresponding operating instructions for cooperation.

The power conversion device 3 converts an external power Vx to provide the driving power required by the LED light bar 2 . The safety switch device 1 is connected to the LED light bar 2 and the power conversion device 3 . The safety switch device 1 mainly includes a switch module 11 , a full bridge conversion unit 12 and a trigger circuit 13 . Wherein, the main function of the safety switch device 1 is that when the external power supply Vx supplies power to the LED light bar 2, the trigger maintaining unit 133 generates the trigger power required by the switch module 11 to ensure that the switch module 11 is powered on. After being turned on, the external power supply Vx drives the LED light bar 2 to light up. In this way, it can prevent the user from getting an electric shock when installing the general-purpose LED lamp tube, so as to ensure the personal safety of the user. As for the implementation and operation principle of the safety switch device 1 , refer to FIGS. 2 to 5 and their corresponding descriptions, and no further details are given here.

Please refer to FIG. 7 , which is a circuit block diagram of a power conversion device of the present invention. The power conversion device 3 includes a rectification and filtering circuit 32 , a DC-to-DC conversion circuit 34 and a frequency selection circuit 36 . The rectification and filtering circuit 32 receives the external power Vx, rectifies and filters the external power Vx to provide a rectification and filtering power. The DC-to-DC conversion circuit 34 is connected to the rectification and filtering circuit 32 , converts the rectification and filtering power to output a driving power, and then drives the LED light bar 2 .

The frequency selection circuit 36 is connected to the rectification and filtering circuit 32 , the DC-to-DC conversion circuit 34 and the LED light bar 2 . Wherein when the external power supply Vx is a high frequency power supply, the frequency selection circuit 36 is turned on to provide high frequency to drive the light emitting diode light bar 2; when the external power supply Vx is a low frequency power supply, the frequency selection circuit 36 is a shutdown operation to provide low frequency to drive the LED light bar 2 .

Please refer to FIG. 8 , which is a schematic diagram of the operation of the first embodiment of the power conversion device of the present invention. Wherein the operation of the first embodiment is a high frequency operation. When the external power supply Vx is a high-frequency power supply and operates in the positive half cycle, the external power supply Vx provides a first high-frequency power supply circuit Lp3 for the rectification and filtering circuit 32, the DC-to-DC conversion circuit 34, and the light emitting circuit in sequence. The diode light bar 2, the frequency selection circuit 36 and the safety switch device 1 are formed. When the external power supply Vx is the high-frequency power supply and operates in the negative half cycle, the external power supply Vx provides a second high-frequency power supply circuit Lp4 for the safety switch device 1, the DC-to-DC conversion circuit 34, and the light emitting circuit in sequence. The diode light bar 2 , the frequency selection circuit 36 and the rectification and filtering circuit 32 are composed. Therefore, through the first high-frequency power supply loop Lp3 and the second high-frequency power supply loop Lp4 , the external power supply Vx provides high-frequency power drive for the LED light bar 2 .

Please refer to FIG. 9 , which is a schematic diagram illustrating the operation of the second embodiment of the power conversion device of the present invention. Wherein the operation of the second embodiment is a low frequency operation. When the external power supply Vx is a low-frequency power supply and operates in the positive half cycle, the external power supply Vx provides a first low-frequency power supply circuit Lp5 for the rectification and filtering circuit 32, the DC-to-DC conversion circuit 34, and the LED lamp in sequence. 2 and the safety switch device 1; when the external power supply Vx is the low-frequency power supply and operates in the negative half cycle, the external power supply Vx provides a second low-frequency power supply circuit Lp6 for the safety switch device 1, the The DC-to-DC conversion circuit 34 is composed of the LED light bar 2 and the rectification and filtering circuit 32 .

In other words, when the external power supply Vx is a low-frequency power supply, since the frequency selection circuit 36 is turned off, the LED strip 2 is directly driven by the DC driving voltage converted by the DC-to-DC conversion circuit 34 . It is worth mentioning that in the present utility model, the DC-to-DC conversion circuit 34 can be a buck converter, a boost converter or a buck-boost converter. converter), but not limited thereto.

Please refer to FIG. 10 which is a detailed circuit block diagram of the power conversion device of the present invention. As mentioned above, the frequency selection circuit 36 includes at least a transistor switch 362, and by controlling the turn-on and turn-off of the transistor switch 362, the corresponding driving circuit can be realized when the external power supply Vx is a high-frequency power supply or a low-frequency power supply. . That is, when the external power supply Vx is the high frequency power supply, the transistor switch 362 is in the on state, and when the external power supply Vx is the low frequency power supply, the transistor switch 362 is in the off state.

It is worth mentioning that the frequency selection circuit 36 provides frequency selection and filtering functions, and is essentially a high-pass filter circuit. The frequency selection circuit 36 mainly includes the transistor switch 362 , a filter resistor R _f and a filter capacitor R _f . Wherein the cut-off frequency f _z of the high-pass filter circuit is:

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; z</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}_{\mathrm{<span\; class="notranslate">\; f</span>}}{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; f</span>}}}$

Therefore, when the external power supply Vx is the high-frequency power supply, the transistor switch 362 is turned on through the filter resistor R _f and the filter capacitor R _f ; otherwise, when the external power supply Vx is the low-frequency power supply, it is turned off. The transistor switch 362 is turned off.

Please refer to FIG. 11 , which is a schematic diagram of the first application embodiment of the general-purpose LED tube of the present invention. Fig. 11 is a diagram illustrating the circuit connection relationship of the universal light-emitting diode lamp 10 assembled to a lamp holder (not shown), in other words, by installing the general-purpose LED lamp 10 on the lamp holder, and passing The external power supply Vx supplies power to form a power supply system for the light-emitting diode lamp. The power supply system includes a lamp holder and a general-purpose LED lamp tube 10 . The lamp socket provides an external power Vx. The general-purpose LED lamp tube 10 has a first end portion CON1 on the first side, a second end portion CON2 on the first side, a first end portion CON3 on the second side, and a second end portion CON4 on the second side. These ends CON1-CON4 are assembled and connected to the lamp holder. The general-purpose LED lamp tube 10 mainly includes an LED light bar 2 , a power conversion device 3 and a safety switch device 1 . As for the implementation and operation principles of the safety switch device 1 and the power conversion device 3 , please refer to FIGS. 2-5 and FIGS. 7-10 and their corresponding descriptions, and will not be repeated here.

In the first application embodiment shown in FIG. 11 , the lamp holder includes an electronic ballast 20 , and the electronic ballast 20 has two input terminals and at least two output terminals. When the universal light emitting diode tube 10 is assembled on the lamp holder, the first end CON1 on the first side of the universal light emitting diode tube 10 is connected to the second end CON2 on the first side, and then connected to one of the output ends of the electronic ballast; and the first end CON3 on the second side of the general-purpose LED lamp 10 is connected to the second end CON4 on the second side, and then connected to the electronic ballast. The other output end of the electronic ballast; the external power supply Vx is connected to the two input ends of the electronic ballast 20 to supply power to the general-purpose LED lamp 10 . However, the above-mentioned ends CON1 - CON4 of the general-purpose LED tube 10 are only in relation to relative positions in this embodiment, and are not intended to limit the scope of protection of the present invention.

Please refer to FIG. 12 , which is a schematic diagram of a second application embodiment of the general-purpose LED tube of the present invention. FIG. 12 is a diagram illustrating the circuit connection relationship of multiple (root) general-purpose LED lamp tubes 10 assembled to the lamp holder. The lamp holder includes an electronic ballast 20, and the electronic ballast 20 has two input terminals and at least two output terminals. When the universal light emitting diode tube 10 is assembled on the lamp holder, the first end CON1 on the first side of the universal light emitting diode tube 10 is connected to the second end CON2 on the first side, and then connected to one of the output ends of the electronic ballast; and the first end CON3 on the second side of the general-purpose LED lamp 10 is connected to the second end CON4 on the second side, and then connected to the electronic ballast. The other output end of the electronic ballast; the external power supply Vx is connected to the two input ends of the electronic ballast 20 to supply power to the general-purpose LED lamp 10 .

Please refer to FIG. 13 , which is a schematic diagram of a third application embodiment of the general-purpose LED tube of the present invention. The lamp holder includes an inductive ballast 30, and the inductive ballast 30 has an input terminal and an output terminal. When the universal LED tube 10 is assembled in the lamp holder, the first end CON1 on the first side and the first end CON3 on the second side of the universal LED tube 10 pass through a short circuit element 31 directly connected; and the second side second end CON4 of the universal LED tube 10 is connected to the output end of the magnetic ballast 30; the external power supply Vx is connected to the universal LED tube 10 The second end portion CON2 on the first side and the input end of the inductive ballast 30 provide power to the general-purpose LED lamp 10 .

Please refer to FIG. 14 , which is a schematic diagram of a fourth application embodiment of the general-purpose LED tube of the present invention. FIG. 14 is a diagram illustrating the circuit connection relationship of the general-purpose LED lamp 10 assembled to the lamp holder without a ballast. When the general-purpose LED lamp tube 10 is connected to the lamp holder, the second side first end CON3 of the general-purpose LED lamp tube 10 and the second side second end part CON4 are in the air (no connection, N.C.); the external power supply Vx is connected to the first end CON1 on the first side and the second end CON2 on the first side of the general-purpose light-emitting diode lamp 10, and then the general-purpose light-emitting diode lamp 10 powered by.

Please refer to FIG. 15 which is a circuit diagram of an electronic virtual filament of the present invention. The virtual filament circuit 4 mainly includes a detection capacitor 41 and a detection resistor 42 , wherein the detection resistor 42 is connected to the detection capacitor 41 in parallel. It is worth mentioning that when the external power supply Vx is a high-frequency power supply, between the first end CON1 on the first side and the second end CON2 on the first side, the detection capacitor 41 detects that the general-purpose light-emitting diode lamp The tube is installed on the lamp base to realize the function of virtual filament. More specifically, when the external power supply Vx is a high-frequency power supply, the impedance value of the detection capacitor 41 approaches zero. Therefore, the connection between the first end CON1 on the first side and the second end CON2 on the first side The interval is equivalent to a short-circuit state, therefore, it can be detected that the general-purpose light-emitting diode lamp tube is installed on the lamp holder.

When the external power supply Vx is a low-frequency power supply or a DC power supply, between the first end CON1 on the first side and the second end CON2 on the first side, the detection resistor 42 detects that the universal light-emitting diode lamp is installed On the lamp holder to realize the function of virtual filament. Wherein the detection resistor 42 is a positive temperature coefficient thermistor (PTC thermal resistor). More specifically, when the external power supply Vx is a low-frequency power supply or a DC power supply, since the detection capacitor 41 is in a high impedance state, a detection current flows through the external power supply Vx through the detection resistor 42 . Therefore, using the positive temperature coefficient characteristic of the detection resistor 42 , the resistance value of the detection resistor 42 increases as the temperature rises. In this way, the current flowing through the detection resistor 42 decreases as the resistance value of the detection resistor 42 increases. Therefore, it can not only be used as a virtual filament when the external power supply Vx is a low-frequency power supply or a DC power supply, but also can be reduced. loss during detection.

Thereby, through the design of the virtual filament circuit 4, it can not only be applied to high-frequency power supply, low-frequency power supply or even DC power supply as a virtual filament, but also reduce the loss caused by the detection current to maintain the general-purpose light-emitting diode The overall efficiency of the lamp's power supply system.

In summary, the utility model has the following advantages:

1. Applying the safety switch device 1 to the operation of the light-emitting diode lamp to ensure that the switch module 11 will be turned on after the general-purpose light-emitting diode lamp 10 is fully plugged into the lamp socket, and then the external power supply Vx Drive the light-emitting diode light bar 2 to emit light, so it can prevent the user from getting an electric shock when installing and dismounting the general-purpose light-emitting diode light tube 10, so as to ensure the personal safety of the user;

2. The safety switch device 1 designed by electronic components is applied when the general-purpose light-emitting diode lamp 10 is installed on the lamp holder, and can realize the function of automatic over-power by detecting the status of the external power supply Vx, and It does not require the user to press the physical mechanical switch to improve the convenience of operation;

3. The start capacitor 14 with a small capacitance value is used to provide an electrical path before the switch module 11 is turned on. When the lamp tube is completely installed on the lamp holder and the high frequency is high, the start capacitor 14 can generate an effective trigger current. And through the branch diode 15, a trigger voltage is established in the resistance-capacitance group of the trigger maintenance unit, and then the switch module 11 is turned on;

4. Through the on and off of the frequency selection circuit 36, it is detected that the external power supply Vx is a high-frequency power supply or a low-frequency power supply, so as to provide a suitable driving power supply for the LED light bar 2, thereby improving the performance of the LED light bar 2. efficiency and lifespan;

5. The DC-to-DC conversion circuit 34 can provide power converters with different circuit topologies, such as buck converters, boost converters, or buck-boost converters, according to the needs of practical applications. A converter (buck-boost converter), to increase the range of the driving voltage of the LED light bar 2;

6. The universal light-emitting diode tube 10 can be installed on magnetic ballasts with low-frequency lighting or electronic ballasts with high-frequency instantaneous lighting, or even without ballasts (none Ballast) lamp holder use;

7. Utilizing the safety switch device 1, the frequency selection circuit 36 and the DC-to-DC conversion circuit 34 designed by the utility model, the light-emitting diode tube 10 can be universally installed on the exterior of different types and different voltage levels. In other words, there is no need to change the design of the universal light-emitting diode lamp 10 according to different power sources. In this way, for manufacturers, the labor cost and component cost required for designing different lamp tubes can be saved; For users, the practicability and convenience of the general-purpose LED lamp tube 10 can be greatly improved; and

8. Through the design of the virtual filament circuit 4, it can not only be applied to high-frequency power supply, low-frequency power supply or even DC power supply as a virtual filament, but also reduce the loss caused by the detection current to maintain the general-purpose light-emitting diode lamp The overall efficiency of the power system.

The above is only a detailed description and drawings of preferred embodiments of the present utility model, but the features of the present utility model are not limited thereto, and are not intended to limit the utility model. All scope of the utility model should be based on the scope of the present case The scope of claims is the criterion, and all the embodiments that conform to the spirit of the patent scope of the utility model and its similar changes should be included in the category of the utility model, and any person who is familiar with the art in the field of the utility model can Any change or modification that can be thought of easily can be covered in the scope of protection of this case.

Claims (16)

1. a safety switching apparatus, it connects a light-emitting diode light bar and a power supply change-over device, this power supply change-over device changes an external power source to provide the driving power needed for this light-emitting diode light bar, it is characterized in that, this safety switching apparatus comprises a switch module, a full-bridge converting unit, circuits for triggering, a start-up capacitance and a bypass diodes, wherein

This switch module has a first end, one second end and a trigger end;

This full-bridge converting unit has one first power end, a second source end, one first output and one second output; Wherein this first output connects this second end of this switch module, and this second output connects this first end of this switch module, and this first power end connects this light-emitting diode light bar;

These circuits for triggering at least comprise a diode, a transformer and triggers and maintains unit, wherein,

This diode has an anode tap and a cathode terminal;

This transformer has one first primary side, one second primary side, one first secondary end and a second subprime end; Wherein this first primary side connects this second source end, and this second primary side connects this external power source, and this second subprime end connects this anode tap;

This triggering maintains this second end and this trigger end that unit connects this first secondary end, this cathode terminal and this switch module;

This start-up capacitance has a first end and one second end; Wherein this first end connects this first power end of this full-bridge converting unit, and this second end connects this second source end of this full-bridge converting unit and this first primary side of this transformer, to form one first branch road;

This bypass diodes has an anode tap and a cathode terminal; Wherein this anode tap connects this second output of this full-bridge converting unit, and this cathode terminal connects this first end of this switch module, to form one second branch road;

Wherein when this external power source is powered for this light-emitting diode light bar, this triggering maintenance unit produces the triggering voltage needed for this switch module, and after guaranteeing this switch module conducting, this external power source drives this light-emitting diode light bar shinny.

2. safety switching apparatus according to claim 1, wherein this switch module comprises at least one switch element, and at least this switch element has this first end, this second end and this trigger end; And

This triggering maintains unit and comprises at least one resistance capacitance group, and at least this resistance capacitance group is connected with a capacitances in series by a resistance, to form one first link, one second link and to connect end altogether; Wherein this first link connects this cathode terminal of this diode, and this second link connects this second end of at least this switch element, and this connects this trigger end that end connects at least this switch element altogether;

Wherein the quantity of this resistance capacitance group is equal with the quantity of this switch element.

3. safety switching apparatus according to claim 2, wherein when this external power source is powered for this light-emitting diode light bar, this external power source first sets up a charging voltage to the charging of this start-up capacitance, this charging voltage is via this first branch road and this this diode of transformer conducting, and the vertical trigger voltage of this resistance capacitance establishment of unit is maintained by this triggering, by this trigger end to trigger this switch module, and then this switch module of conducting; This external power source, again via this full-bridge converting unit and this second branch road, makes this external power source drive this light-emitting diode light bar shinny.

4. safety switching apparatus according to claim 1, wherein the capacitance of this start-up capacitance is between 470 × 10-12 farad to 2.2 × 10-9 farad.

5. a general-purpose type light-emitting diode lamp tube, is characterized in that, comprises a light-emitting diode light bar, a power supply change-over device and a safety switching apparatus, wherein,

This power supply change-over device is for changing an external power source to provide the driving power needed for this light-emitting diode light bar;

This safety switching apparatus connects this light-emitting diode light bar and this power supply change-over device, and this safety switching apparatus comprises a switch module, a full-bridge converting unit, circuits for triggering, a start-up capacitance and a bypass diodes, wherein,

This switch module has a first end, one second end and a trigger end;

This full-bridge converting unit has one first power end, a second source end, one first output and one second output; Wherein this first output connects this second end of this switch module, and this second output connects this first end of this switch module, and this first power end connects this light-emitting diode light bar;

These circuits for triggering at least comprise a diode, a transformer and triggers and maintains unit, wherein,

This diode has an anode tap and a cathode terminal;

This transformer has one first primary side, one second primary side, one first secondary end and a second subprime end; Wherein this first primary side connects this second source end, and this second primary side connects this external power source, and this second subprime end connects this anode tap;

This triggering maintains this second end and this trigger end that unit connects this first secondary end, this cathode terminal and this switch module;

This start-up capacitance has a first end and one second end; Wherein this first end connects this first power end of this full-bridge converting unit, and this second end connects this second source end of this full-bridge converting unit and this first primary side of this transformer, to form one first branch road; And

This bypass diodes has an anode tap and a cathode terminal; Wherein this anode tap connects this second output of this full-bridge converting unit, and this cathode terminal connects this first end of this switch module, to form one second branch road;

Wherein when this external power source is powered for this light-emitting diode light bar, this triggering maintenance unit produces the triggering voltage needed for this switch module, and after guaranteeing this switch module conducting, this external power source drives this light-emitting diode light bar shinny.

6. general-purpose type light-emitting diode lamp tube according to claim 5, wherein this power supply change-over device comprises:

One current rectifying and wave filtering circuit, for receiving this external power source, carries out rectification and filtering operation to this external power source, to provide a rectification filtering power;

One DC-DC converting circuit, connects this current rectifying and wave filtering circuit, for changing this rectification filtering power to export a driving power, and then drives this light-emitting diode light bar; And

One frequency selective network, connects this current rectifying and wave filtering circuit, this DC-DC converting circuit and this light-emitting diode light bar; Wherein when this external power source is a high frequency electric source, this frequency selective network is conducting operation, to provide high-frequency drive this light-emitting diode light bar; When this external power source is a low-frequency power, this frequency selective network operates for turning off, to provide low frequency driving this light-emitting diode light bar.

7. general-purpose type light-emitting diode lamp tube according to claim 6, wherein this frequency selective network at least comprises a transistor switch; When this external power source is this high frequency electric source, this transistor switch is conducting state, and when this external power source is this low-frequency power, this transistor switch is off state.

8. general-purpose type light-emitting diode lamp tube according to claim 7, wherein when this external power source is a high frequency electric source, and when being the operation of positive half cycle, this external power source provides one first high frequency current supply circuit to be sequentially this current rectifying and wave filtering circuit, this DC-DC converting circuit, this light-emitting diode light bar, this transistor switch of this frequency selective network and this safety switching apparatus to form; When this external power source is this high frequency electric source, and for negative half period operate time, this external power source provides one second high frequency current supply circuit to be sequentially this safety switching apparatus, this DC-DC converting circuit, this light-emitting diode light bar, this transistor switch of this frequency selective network and this current rectifying and wave filtering circuit to form.

9. general-purpose type light-emitting diode lamp tube according to claim 7, wherein when this external power source is a low-frequency power, and when being the operation of positive half cycle, this external power source provides one first low frequency power supply loop to be sequentially this current rectifying and wave filtering circuit, this DC-DC converting circuit, this light-emitting diode light bar and this safety switching apparatus to form; When this external power source is this low-frequency power, and for negative half period operate time, this external power source provides one second low frequency power supply loop to be sequentially this safety switching apparatus, this DC-DC converting circuit, this light-emitting diode light bar and this current rectifying and wave filtering circuit to form.

10. a power-supply system for general-purpose type light-emitting diode lamp tube, is characterized in that, comprises a lamp socket and a general-purpose type light-emitting diode lamp tube:

This lamp socket is used for providing an external power source;

This general-purpose type light-emitting diode lamp tube has one first side first end, one first side the second end, one second side first end and one second side the second end, is connected on this lamp socket by this first side first end, this first side the second end, this second side first end and this second side the second end group; This general-purpose type light-emitting diode lamp tube comprises a light-emitting diode light bar, a power supply change-over device and a safety switching apparatus, wherein,

This power supply change-over device is for changing this external power source to provide the driving power needed for this light-emitting diode light bar;

This safety switching apparatus is for connecting this light-emitting diode light bar and this power supply change-over device, and this safety switching apparatus comprises a switch module, a full-bridge converting unit, circuits for triggering, a start-up capacitance and a bypass diodes, wherein,

This switch module has a first end, one second end and a trigger end;

This full-bridge converting unit has one first power end, a second source end, one first output and one second output; Wherein this first output connects this second end of this switch module, and this second output connects this first end of this switch module, and this first power end connects this light-emitting diode light bar;

These circuits for triggering at least comprise a diode, a transformer and triggers and maintains unit, wherein,

This diode has an anode tap and a cathode terminal;

This transformer has one first primary side, one second primary side, one first secondary end and a second subprime end; Wherein this first primary side connects this second source end, and this second primary side connects this external power source, and this second subprime end connects this anode tap;

This triggering maintains this second end and this trigger end that unit connects this first secondary end, this cathode terminal and this switch module;

This start-up capacitance has a first end and one second end; Wherein this first end connects this first power end of this full-bridge converting unit, and this second end connects this second source end of this full-bridge converting unit and this first primary side of this transformer, to form one first branch road;

This bypass diodes has an anode tap and a cathode terminal; Wherein this anode tap connects this second output of this full-bridge converting unit, and this cathode terminal connects this first end of this switch module, to form one second branch road;

Wherein when this general-purpose type light-emitting diode lamp tube group is connected on this lamp socket, and this external power source for this light-emitting diode light bar power time, this triggering maintenance unit produces the triggering voltage needed for this switch module, after guaranteeing this switch module conducting, this external power source drives this light-emitting diode light bar shinny.

The power-supply system of 11. general-purpose type light-emitting diode lamp tubes according to claim 10, wherein this lamp socket comprises an electronic ballast, and this electronic ballast has two inputs and at least two outputs;

Wherein when this general-purpose type light-emitting diode lamp tube group is connected on this lamp socket, this first side first end and this first side the second end of this general-purpose type light-emitting diode lamp tube are interconnected, then are connected to a wherein output of this electronic ballast; And this second side first end of this general-purpose type light-emitting diode lamp tube and this second side the second end are interconnected, then be connected to wherein another output of this electronic ballast; This external power source is connected to these two inputs of this electronic ballast, and then powers to this general-purpose type light-emitting diode lamp tube.

The power-supply system of 12. general-purpose type light-emitting diode lamp tubes according to claim 10, wherein this lamp socket comprises an electronic ballast, and this electronic ballast has two inputs and at least two outputs;

Wherein when multiple general-purpose type light-emitting diode lamp tube and joint group is connected on this lamp socket time, this the first side first end and this first side the second end of each this general-purpose type light-emitting diode lamp tube are interconnected, then are connected to a wherein identical output of this electronic ballast; And this second side first end of each this general-purpose type light-emitting diode lamp tube and this second side the second end are interconnected, then be connected to the wherein different outputs of this electronic ballast respectively; This external power source is connected to these two inputs of this electronic ballast, and then powers to this general-purpose type light-emitting diode lamp tube.

The power-supply system of 13. general-purpose type light-emitting diode lamp tubes according to claim 10, wherein this lamp socket comprises an inductance type ballast, and this inductance type ballast has an input and an output;

Wherein when this general-purpose type light-emitting diode lamp tube group is connected on this lamp socket, this first side first end of this general-purpose type light-emitting diode lamp tube is directly connected by a short-circuit component with this second side first end; And this second side the second end of this general-purpose type light-emitting diode lamp tube connects this output of this inductance type ballast; This external power source is connected to this first side the second end of this general-purpose type light-emitting diode lamp tube and this input of this inductance type ballast, and then powers to this general-purpose type light-emitting diode lamp tube.

The power-supply system of 14. general-purpose type light-emitting diode lamp tubes according to claim 10, wherein when this general-purpose type light-emitting diode lamp tube group is connected on this lamp socket, this second side first end and this second side the second end of this general-purpose type light-emitting diode lamp tube are that sky connects; This external power source is connected to this first side first end and this first side the second end of this general-purpose type light-emitting diode lamp tube, and then powers to this general-purpose type light-emitting diode lamp tube.

The power-supply system of 15. general-purpose type light-emitting diode lamp tubes according to claim 10, also comprises:

One virtual heater chain, this virtual heater chain comprises a Detection capacitance and and detects resistance, wherein,

This Detection capacitance is connected to this first side first end and this first side the second end of this general-purpose type light-emitting diode lamp tube;

This detection resistor coupled in parallel connects this Detection capacitance;

Wherein when this external power source is high frequency electric source, between this first side first end and this first side the second end, detect that this general-purpose type light-emitting diode lamp tube is installed on this lamp socket by this Detection capacitance; When this external power source be low-frequency power or DC power supply time, go out this general-purpose type light-emitting diode lamp tube by this detection resistance detection between this first side first end and this first side the second end and be installed on this lamp socket.

The power-supply system of 16. general-purpose type light-emitting diode lamp tubes according to claim 15, wherein this detection resistance is a semistor.