TWI492665B - Tubular light emitting device - Google Patents

Description

Tubular light emitting device

The present invention relates to a tubular light-emitting device, and more particularly to a tubular light-emitting device having a light-emitting diode (LED).

In recent years, due to the continuous improvement of the process and materials of the Light Emitting Diode (LED), the luminous efficiency of the light-emitting diode has been greatly improved. Unlike general fluorescent lamps or power-saving bulbs, LEDs have been widely used in many types due to their low power consumption, low pollution, long service life, high safety, short response time and small size. In the electronics. One of the applications is to make a light-emitting device having a light-emitting diode into the same shape as a conventional fluorescent tube, and to be mounted on a lamp instead of a conventional fluorescent tube.

Please refer to FIG. 1 , which is a schematic diagram of a conventional tubular light-emitting device 1 . Wherein, the tubular light-emitting device 1 may comprise a plurality of light-emitting diodes (not shown), and the tubular light-emitting device 1 is an appliance capable of converting electrical energy into light energy.

The tubular light-emitting device 1 comprises a light-emitting diode lamp 11 (hereinafter referred to as a lamp tube 11) and a lamp 12, and the lamp tube 11 comprises two electrical connection elements 111, 112 and a tube body 113. The electrical connection elements 111, 112 are respectively disposed on both sides of the tube body 113, and the plurality of light-emitting diodes and their driving elements (not shown) are disposed in the tube body 113. In addition, the luminaire 12 can include two fixing bases 121 and 122 and a main body 123. The fixing bases 121 and 122 are respectively disposed at two ends of the main body 123, and the electrical connecting elements 111 and 112 of the bulb 11 can be respectively mounted on the fixing base 121. And 122, the lamp tube 11 can be illuminated by providing an AC power source to the tubular light-emitting device 1.

When the user wants to install the lamp 11 on the lamp 12, the electric connecting component 111 of FIG. 1 is first mounted on the fixing seat 121 on one side, and then the fixing seat 122 on the other side of the lamp 12 is manually disposed. Slightly widened to mount another electrical connection element 112 to the other mount 122 on. However, when the electrical connection element 111 is mounted on the mount 121 and the electrical connection element 112 contacts the other mount 122, the external AC power source may generate a high voltage (eg, 1000 volts) at the instant of conduction to burn the tubular light. Internal components of device 1 (eg rectifiers).

Therefore, how to provide a light-emitting device can avoid the overvoltage of the turn-on instant in the installation process to burn out its internal components, and has become one of the current important topics.

In view of the above problems, it is an object of the present invention to provide a tubular light-emitting device capable of avoiding an internal voltage of an internal device by an overvoltage at the turn-on instant of the mounting process.

In order to achieve the above object, a tubular light-emitting device according to the present invention receives an external power source, and includes an illumination unit, a switch unit, a first electrical connection component and a second electrical connection component, an overvoltage protection unit, and a self- Lock control unit. The switch unit is electrically connected to the light emitting unit to form a series circuit. The first electrical connection component and the second electrical connection component are respectively located at two ends of the light-emitting device, and respectively have two electrical input ends, and the electrical input terminals are electrically connected to the external power source and the series circuit. The overvoltage protection unit is electrically connected to the first electrical connection component, the second electrical connection component, and the switch unit, respectively. The self-locking control unit is electrically connected to the switch unit. When the overvoltage protection unit senses that the voltage between the first electrical connection component and the second electrical connection component exceeds a threshold, the switching unit may be turned on to discharge the external power source through the light emitting unit, and when the light emitting unit starts to conduct discharge (lighting) After the voltage of the external power source is lower than the critical value due to the discharge, the self-locking control unit can control the switching unit to be continuously turned on and the light emitting unit continues to emit light.

In an embodiment, the light emitting unit comprises at least one light emitting diode.

In one embodiment, the overvoltage protection unit includes a shunt diode, a transient voltage suppressor, a varistor, or a voltage dividing resistor.

In one embodiment, when the switching unit is turned on, a current generated by the external power source flows through a current path formed by the first electrical connection element, the light emitting unit, the switching unit, and the second electrical connection element.

In an embodiment, the self-locking control unit and the switching unit form a controlled rectifier.

In an embodiment, the self-locking control unit detects current or electricity of the light-emitting unit Pressing, and generating a self-locking control signal after the lighting unit starts to emit light, the switching unit is controlled to be continuously turned on.

In one embodiment, the tubular light-emitting device further includes a rectifying unit, wherein the input end is electrically connected to the first electrical connecting component or the second electrical connecting component, and the output end thereof is electrically connected to the series circuit.

In one embodiment, the tubular light-emitting device further includes an impedance element electrically connected between the two electrical input ends of the first electrical connection element or between the two electrical input ends of the second electrical connection element.

In one embodiment, the impedance element is a resistor, or an inductor, or a capacitor or a diode, or a combination thereof.

In an embodiment, when the number of the impedance elements is two, one of the impedance elements is electrically connected between the two electrical input ends of the first electrical connection element, and the other of the impedance elements The electrical connection is electrically connected between the two electrical input ends of the second electrical connection component.

According to the above aspect, in the tubular light-emitting device according to the present invention, when the user operates the live wire to mount the first electrical connection component of the tubular light-emitting device to a fixed seat of a conventional daylight lamp and is connected to an external power source, When the second electrical connection element of the tubular light-emitting device is mounted to another fixed seat of the conventional daylight lamp and connected to the external power source, if the over-voltage protection unit senses between the first electrical connection element and the second electrical connection element When the instantaneous voltage (for example, 1000 V or more) exceeds a critical value (for example, 800 V), the switching unit is turned on, so that the overvoltage generated by the external power source can be discharged through the light emitting unit, thereby reducing the external power supply due to the moment of installation. The generated high voltage prevents the internal components of the tubular light-emitting device from being burnt, and at the same time, by the function of the self-locking control unit, it is possible to prevent the switching unit from oscillating when the external power supply voltage is unstable.

1, 2, 2a‧‧‧ tubular illuminating device

11‧‧‧Lighting diode lamp

111, 112‧‧‧ Electrical connection elements

113‧‧‧ tube body

12‧‧‧Lighting

121, 122‧‧‧ fixed seat

123‧‧‧Ontology

21‧‧‧Lighting unit

22‧‧‧Switch unit

23‧‧‧First electrical connection element

24‧‧‧Second electrical connection element

25‧‧‧Overvoltage protection unit

26‧‧‧Self-locking control unit

27, 28‧‧‧Rectifier unit

271, 281‧‧‧ first input

272, 282‧‧‧ second input

273, 283‧‧‧ output

274, 284, GND‧‧‧ grounding terminal

291, 292‧‧‧ impedance components

A‧‧‧Anode

A1, B1‧‧‧ first electrode

A2, B2‧‧‧ second electrode

D1‧‧‧Jenner diode

G‧‧‧ gate

K‧‧‧ cathode

Q1, Q2‧‧‧O crystal

R1~R4‧‧‧ resistor

SCR‧‧‧controlled rectifier

1 is a schematic view of a conventional tubular light-emitting device.

2 is a schematic view of a tubular light emitting device in accordance with a preferred embodiment of the present invention.

3A is a schematic circuit diagram of an embodiment of a tubular light-emitting device of the present invention.

FIG. 3B is a schematic circuit diagram of a tubular light-emitting device according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tubular light-emitting device according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same elements will be described with the same reference numerals.

Please refer to FIG. 2, which is a schematic diagram of a tubular light-emitting device 2 according to a preferred embodiment of the present invention. It should be noted that the tubular light-emitting device 2 of the present invention is compatible with a fluorescent tube of an inductive ballast or an electronic ballast having a large coil, and can be applied to replace a conventional fluorescent tube. In order to replace the conventional fluorescent tube, the tubular light-emitting device 2 is formed in the same shape as the conventional fluorescent tube and can be engaged with the lamp holder of the conventional lamp. Wherein, the tubular light-emitting device 2 can receive an external power source (not shown), the external power source can be a mains power source, and the voltage can be, for example, 110 volts or 220 volts AC, and the frequency can be, for example, 50 Hz (hertz, Hz). , 60 Hz or multiples thereof, or a high frequency AC power supply. Here, there is no limitation.

The tubular light-emitting device 2 includes a light-emitting unit 21, a switch unit 22, a first electrical connection element 23, a second electrical connection element 24, an over-voltage protection unit 25, and a self-locking control unit 26. In addition, the tubular light-emitting device 2 may further include at least one rectifying unit, and the embodiment is exemplified by including two rectifying units 27 and 28.

The light emitting unit 21 has at least one light emitting diode. For example, a plurality of light-emitting diodes (not shown) may be used. The light-emitting diodes may be a combination of series, parallel, or series-parallel connection, and the switch unit 22 is electrically connected to the light-emitting unit 21 to form A series circuit. The switch unit 22 can be an electronic switch (such as a transistor switch or a light-coupled switch), or can be a mechanical switch (such as a relay), and is not limited thereto.

The input end of the rectifying unit 27 is electrically connected to the first electrical connecting component 23, the output end of the rectifying unit 28 is electrically connected to the series circuit formed by the light emitting unit 21 and the switching unit 22, and the input end of the rectifying unit 28 is electrically connected to the second electrical connecting component. 24, the output end is also electrically connected to the series circuit formed by the light-emitting unit 21 and the switch unit 2.

The first electrical connection element 23 and the second electrical connection element 24 are respectively located at opposite ends of the light emitting device. The first electrical connection element 23 has two electrical input terminals, namely a first electrode A1 and a second electrode A2. The first electrode A1 and the second electrode A2 are electrically connected to the external power source, the rectifying unit 27 and the switch unit 22 and emit light. The second electrical connection component 24 has two electrical input terminals, that is, a first electrode B1 and a second electrode B2, and the first electrode B1 and the second electrode B2 are electrically connected to the external power supply. , the rectifying unit 28 and the switching unit 22 and the light emitting unit 21 The resulting series circuit.

The overvoltage protection unit 25 is electrically connected to the first electrical connection element 23, the second electrical connection element 24, and the switch unit 22, respectively. Here, the overvoltage protection unit 25 can include, for example but not limited to, a Zener diode, a transient voltage suppressor, a varistor, or a voltage divider resistor. The light-emitting unit 21 is disposed in parallel, and the over-voltage protection unit 25 is electrically connected to the rectifying unit 27 and the rectifying unit 28, respectively.

The self-locking control unit 26 is electrically connected to the switching unit 22. The self-locking control unit 26 can control the switch unit 22 according to the lighting state of the light emitting unit 21. In other words, the self-locking control unit 26 detects the current or voltage of the light-emitting unit 21, and generates a self-locking control signal to lock the switch unit 22 in the on state after the light-emitting unit 21 starts to emit light, so that the light-emitting unit 21 continues to be lit. a condition that causes a current generated at an instant when the voltage of the external power source is unstable to continuously flow through the first electrical connection element 23, the rectifying unit 27, the light emitting unit 21, the switching unit 22, the rectifying unit 28, and the second electrical connecting element 24 A current path is formed.

After the user operates the live wire to mount the first electrical connection component 23 of the tubular light-emitting device 2 to one of the conventional daylight fixtures and is connected to the external power source, the second electrical connection component 24 of the tubular light-emitting device 2 is mounted. The instantaneous voltage protection unit 25 senses an instantaneous voltage (for example, 1000 V or more) between the first electrical connection element 23 and the second electrical connection element 24 at a moment when another fixed seat of the conventional daylight lamp is connected to the external power source. When a threshold (for example, 800 V) is turned on, the switching unit 22 is turned on, so that the overvoltage generated by the external power source can be discharged through the light emitting unit 21, thereby reducing the high voltage generated by the external power source due to the moment of installation. The internal components of the tubular lighting device 2, such as the rectifying unit, are prevented from burning. In addition, when the light-emitting unit 21 starts to emit light and the voltage of the external power source is lower than the threshold due to the discharge, the self-locking control unit 26 can control the switch unit 22 to continuously conduct, so that the light-emitting unit 21 continues to illuminate and avoid the switch. Unit 22 suddenly turns off and on and off.

Hereinafter, please refer to FIG. 3A, which is a schematic circuit diagram of an embodiment of the tubular light-emitting device 2 of the present invention.

In this embodiment, the rectifying units 27 and 28 are respectively a bridge rectifier. The rectifying units 27 and 28 respectively have a first input end 271, 281, a second input end 272, 282, a common output end 273, 283 and a ground end 274, 284. First An electrical connection component 23 is electrically connected to the first input ends 271, 281 of the external power supply and the rectifying units 27, 28, and the external power supply is separately supplied to the first electrical connection component 23 and the second electrical connection component 24 Sex input. The two ends of the first electrode A1 are respectively connected to the first input end 271 of the external power source and the rectifying unit 27, and the two ends of the second electrode A2 are respectively connected to the first input end 281 of the external power source and the rectifying unit 28. In addition, the second electrical connection component 24 is electrically coupled to the second input terminals 272, 282 of the external power supply and rectifier units 27, 28. The two ends of the first electrode B1 of the second electrical connection component 24 are respectively electrically connected to the external power source and the second input end 272 of the rectifying unit 27, and the two ends of the second electrode B2 are electrically connected to the external power source and the rectifying unit respectively. A second input 282 of 28.

The overvoltage protection unit 25 has a span diode D1 and two resistors R1 and R2. The one end of the resistor D1 is electrically connected to the output ends 273 and 283 of the rectifying unit 27, 28 and the light emitting unit 21, and the other end thereof is electrically connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the resistor R2. One end of the resistor is electrically connected to the gate G of the SCR, and the other end of the resistor R2 is connected to a ground GND.

In addition, as shown in FIG. 3A, the self-locking control unit 26 and the switching unit 22 of the present embodiment form a Silicon Controlled Rectifier SCR. The A pole is an anode, K is a cathode, and G is a gate. The gate G and the resistor R1 of the overvoltage protection unit 25 are electrically connected to the resistor R2, the anode A is electrically connected to the light emitting unit 21, and the cathode K is grounded. When the voltage of the gate G is higher than the cathode K, a forward conduction of P-N is formed. At this time, if the voltage of the anode A is greater than the cathode K, the rectifier rectifier SCR is turned on like a diode. Once in the on state, as long as current flows, the SCR will continue to conduct (ie, self-locking function).

Therefore, when the tubular light-emitting device 2 is mounted, the voltage between the first electrical connection element 23 and the second electrical connection element 24 (i.e., the voltage difference between the output terminals 273, 283 of the rectifying units 27, 28 and the ground GND) When the reverse collapse voltage (also referred to as the so-called threshold value) of one of the sub-dipoles D1 is exceeded, the synchronizing diode D1 will be turned on to generate a current flowing through the resistors R1, R2, so that When the voltage difference between one end of the resistor R2 and the ground GND exceeds the gate voltage of the gate G of the step-controlled rectifier SCR, the step-controlled rectifier SCR will be turned on, so that the current generated by the external power source can flow through the first electrical connection element 23, First of the rectifying unit 27 The input terminal 271 and its output terminal 273, the light-emitting unit 21, the voltage-controlled rectifier SCR (including the switch unit 22 and the self-locking control unit 26), the ground terminal GND, the ground terminal 284 of the rectifier unit 28, and the second input terminal 282 thereof, and The current path formed by the second electrode B2 of the second electrical connection element 24 is discharged through the light emitting unit 21 to reduce the high voltage at the moment of installation; or the current generated by the external power source can flow through the first electrical connection element 23, the rectifying unit The first input terminal 281 of 28 and its output terminal 283, the light emitting unit 21, the controlled rectifier SCR (including the switch unit 22 and the self-locking control unit 26), the ground terminal GND, the ground terminal 274 of the rectifying unit 27, and the second input thereof The end 272, and the current path formed by the first electrode B1 of the second electrical connection element 24; or the current generated by the external power source can flow through the second electrical connection element 24, the second input 272 of the rectification unit 27, and its output The terminal 273, the light emitting unit 21, the controlled rectifier SCR (including the switch unit 22 and the self-locking control unit 26), the ground GND, the grounding end 284 of the rectifying unit 28 and the first input end 281 thereof, and the first electrical connecting component 23 Second The current path formed by the pole A2; or the current generated by the external power source may flow through the second electrical connection element 24, the second input end 282 of the rectifying unit 28 and its output end 283, the light emitting unit 21, the controlled rectifier SCR (including The switching unit 22 and the self-locking control unit 26), the grounding terminal GND, the grounding end 274 of the rectifying unit 27 and its first input end 271, and the current path formed by the first electrode A1 of the first electrical connecting element 23 are transparent to The light emitting unit 21 is discharged to lower the high voltage at the time of installation. Once the light-emitting unit 21 starts to emit light and the voltage difference between the output terminals 273, 283 of the rectifying units 27, 28 and the ground GND is lower than the reverse collapse voltage of the sina diode D1, the sigma diode D1 is not turned on. However, the step-controlled rectifier SCR can be continuously turned on due to its own self-locking characteristic, so that the light-emitting unit 21 continues to emit light (ie, self-locking).

In addition, since the tubular light-emitting device 2 can be applied to replace the conventional fluorescent tube, the tubular light-emitting device 2 of the present embodiment can further include at least one impedance element, and the impedance element is used as an analog filament of a conventional fluorescent tube. The starter and ballast of the conventional lamp can operate normally, and therefore, the conventional ballast device is not replaced by the conventional tubular lamp device 2, and the starter of the conventional ballast is burned, or the electronic ballast must be replaced. Remove or change the line. The impedance component can be electrically connected to the two electrical input ends (the first electrode A1 and the second electrode A2) of the first electrical connection component 23, or the two electrical input terminals of the second electrical connection component 24 (the first electrode B1) , the second electrode B2). Alternatively, the impedance element can be a resistor, or an inductor, or a capacitor or a diode, or a combination of the foregoing. Here, the number of impedance elements is two (291, 292). And each is a resistor (resistors R3, R4). The impedance component 291 is electrically connected between the two electrical input terminals A1 and A2 of the first electrical connection component 23, and the impedance component 292 is electrically connected to the two electrical input terminals B1 and B2 of the second electrical connection component 24. between.

When the tubular light-emitting device 2 is mounted on a lamp having an electronic ballast, the filament current of the first electrical connection element 23 flows between the first electrode A1 and the second electrode A2 through the impedance element 291, and the second electrical connection element 24 The filament current flows between the first electrode B1 and the second electrode B2 through the impedance element 292. When flowing between the first electrode A1 and the second electrode A2 of the first electrical connection element 23, the current path thereof may be the first electrode A1 of the first electrical connection element 23, the first input end 271 of the rectification unit 27, The output terminal 273, the light emitting unit 21, the voltage controlled rectifier SCR, the ground terminal GND, the ground terminal 284 of the rectifying unit 28, the first input end 281 of the rectifying unit 28, and the second electrode A2 of the first electrical connecting element 23. When flowing between the first electrode B1 and the second electrode B2 of the second electrical connection element 24, the current path thereof may be the first electrode B1 of the second electrical connection element 24, the second input end 272 of the rectification unit 27, The output terminal 273, the light emitting unit 21, the step-controlled rectifier SCR, the ground terminal GND, the ground terminal 284 of the rectifying unit 28, the second input end 282 of the rectifying unit 28, and the second electrode B2 of the second electrical connecting element 24.

Here, the functions of the impedance elements 291, 292 are similar to the filaments of conventional fluorescent tubes. Therefore, the tubular light-emitting device 2 simulates the filament by the impedance elements 291, 292, so that the original electronic ballast must not be removed or modified because the conventional fluorescent tube is replaced by the tubular light-emitting device 2 of the present invention. line. Here, when the tubular light-emitting device 2 of the present invention is mounted on a conventional daylight lamp, it can be normally illuminated.

Further, the technical features of the other elements of the tubular light-emitting device 2 have been described in detail above and will not be described again.

In addition, please refer to FIG. 3B, which is a schematic circuit diagram of a tubular light-emitting device 2a according to another embodiment of the present invention.

Different from the tubular light-emitting device 2 of FIG. 3A, the switching unit 22 of the tubular light-emitting device 2a is a transistor Q2, and the self-locking control unit 26 is a transistor Q1. The base (B) of the transistor Q2 is electrically connected to one end of the resistor R2, and the collector (C) is electrically connected to the light-emitting unit 21 via the base (B) and the emitter (E) of the transistor Q1. The emitter (E) is electrically connected to the ground GND, and the base (B) of the transistor Q1 and the collector (C) of the transistor Q2 are electrically connected. For the connection, the collector (C) is electrically connected to the base (B) of the transistor Q2, and the emitter (E) is electrically connected to the light-emitting unit 21.

When the instantaneous spark installed by the tubular light-emitting device 2a causes the voltage between the first electrical connection element 23 and the second electrical connection element 24 to exceed the reverse collapse voltage of the Zener diode D1, the output diode D1 is turned on. A current flows through the resistors R1, R2 such that the voltage difference between one end of the resistor R2 and the base of the transistor Q2 and the ground GND exceeds the base forward voltage of the transistor Q2, and the transistor Q2 is turned on (electrical The crystal Q2 conducts the crystal Q1), so that the current generated by the external power source can flow through the first electrical connection element 23, the first input end 271 and the output end 273 of the rectifying unit 27, the light emitting unit 21, and the transistors Q1, Q2. The ground path GND, the ground terminal 284 of the bridge rectifier 28 and its second input terminal 282, and the current path formed by the second electrode B2 of the second electrical connection element 24 are discharged through the light emitting unit 21 to reduce the height of the installation instant. Voltage. When the switching unit 22 is turned on, the transistor Q2 can supply the base current required for the transistor Q1, and the transistor Q1 can provide the base current required for the transistor Q2 to form a self-locking loop, which is provided by the external power supply. The current can flow through the light-emitting unit 21 to cause the light-emitting unit 21 to continuously emit light. This self-locking loop has the same principle as the controlled rectifier, that is, the transistors Q1 and Q2 form a controlled rectifier.

In addition, other technical features of the tubular light-emitting device 2a can be referred to the tubular light-emitting device 2 of FIG. 3A, and details are not described herein again.

In summary, in the tubular light-emitting device according to the present invention, when the user operates the live wire to install the first electrical connection component of the tubular light-emitting device to a fixed seat of a conventional daylight lamp and is connected to an external power source, When the second electrical connection element of the tubular light-emitting device is mounted to another fixed seat of the conventional daylight lamp and connected to the external power source, if the over-voltage protection unit senses between the first electrical connection element and the second electrical connection element When the instantaneous voltage (for example, 1000 V or more) exceeds a critical value (for example, 800 V), the switching unit is turned on, so that the overvoltage generated by the external power source can be discharged through the light emitting unit, thereby reducing the external power supply due to the moment of installation. The generated high voltage prevents the internal components of the tubular light-emitting device from being burnt, and at the same time, by the function of the self-locking control unit, it is possible to prevent the switching unit from oscillating when the external power supply voltage is unstable.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or changes made to the spirit and scope of the present invention should be included in the attached application. In the range of interest.

2‧‧‧Tubular illuminating device

21‧‧‧Lighting unit

22‧‧‧Switch unit

23‧‧‧First electrical connection element

24‧‧‧Second electrical connection element

25‧‧‧Overvoltage protection unit

26‧‧‧Self-locking control unit

27, 28‧‧‧Rectifier unit

A1, B1‧‧‧ first electrode

A2, B2‧‧‧ second electrode

Claims (10)

A tubular light-emitting device receives an external power source and includes: a light-emitting unit; a switch unit electrically connected to the light-emitting unit to form a series circuit; a first electrical connection component and a second electrical connection component, respectively Located at two ends of the illuminating device, and respectively having two electrical input terminals, the electrical input terminals are electrically connected to the external power source and the series circuit; an overvoltage protection unit, respectively, and the first electrical connecting component The second electrical connection component and the switch unit are electrically connected; and a self-locking control unit electrically connected to the switch unit, wherein the overvoltage protection unit senses the first electrical connection component and the second electrical connection When the voltage between the components exceeds a critical value, the switching unit is turned on to discharge the external power source through the light emitting unit, and the self-locking control is performed when the voltage is lowered below the threshold after the light emitting unit starts to conduct discharge. The unit controls the switching unit to keep it on. The tubular light-emitting device of claim 1, wherein the light-emitting unit comprises at least one light-emitting diode. The tubular light-emitting device of claim 1, wherein the over-voltage protection unit comprises an arrester diode, a transient voltage suppressor, a varistor or a voltage dividing resistor. The tubular light-emitting device of claim 1, wherein the current generated by the external power source flows through the first electrical connection element, the light-emitting unit, the switch unit, and the second electrical connection element when the switch unit is turned on One of the current paths is formed. The tubular light-emitting device of claim 1, wherein the self-locking control unit and the switching unit form a controlled rectifier. The tubular light-emitting device of claim 1, wherein the self-locking control unit detects a current or a voltage of the light-emitting unit, and generates a self-locking control signal to control the switch unit after the light-emitting unit starts to emit light. It continues to conduct. The tubular light-emitting device of claim 1, further comprising: a rectifying unit, wherein the input end is electrically connected to the first electrical connecting component or the second electrical connecting component, and an output end thereof is electrically connected to the series circuit . The tubular light-emitting device of claim 1, further comprising: an impedance element electrically connected between the two electrical input ends of the first electrical connection element, or the second electrical connection element Between two electrical inputs. The tubular light-emitting device of claim 8, wherein the impedance element is a resistor, or an inductor, or a capacitor or a diode, or a combination thereof. The tubular light-emitting device of claim 8, wherein when the number of the impedance elements is two, one of the impedance elements is electrically connected to the two electrical inputs of the first electrical connection element. Between the ends, the other of the impedance elements is electrically connected between the two electrical input ends of the second electrical connection element.