CN220359395U - Double-end LED lamp tube - Google Patents
Double-end LED lamp tube Download PDFInfo
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- CN220359395U CN220359395U CN202321518788.6U CN202321518788U CN220359395U CN 220359395 U CN220359395 U CN 220359395U CN 202321518788 U CN202321518788 U CN 202321518788U CN 220359395 U CN220359395 U CN 220359395U
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- 238000001514 detection method Methods 0.000 claims abstract description 82
- 239000003990 capacitor Substances 0.000 claims description 15
- 230000001012 protector Effects 0.000 claims description 8
- 239000011324 bead Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 206010014357 Electric shock Diseases 0.000 description 10
- 238000005070 sampling Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a double-end LED lamp tube belonging to the technical field of LED lamp tubes, which comprises a lamp tube, wherein one end of the lamp tube is connected with a first lamp cap, the other end of the lamp tube is connected with a second lamp cap, a light source assembly and a leakage detection and driving module are arranged in the lamp tube, one end of the light source assembly is electrically connected with the second lamp cap, the other end of the light source assembly is electrically connected with the leakage detection and driving module, and the leakage detection and driving module is electrically connected with the first lamp cap; the leakage detection and driving module comprises a leakage detection circuit. According to the utility model, the electric leakage detection circuit detects an external input voltage signal, so that the detection of the impedance of an external input end is realized, and according to the impedance detection result, the opening and the closing of the second switch M2 in the chip U1 are controlled by an enabling signal so as to judge whether a human body is connected in the power-on state of the lamp tube, thereby achieving the final purpose of preventing the human body from electric shock.
Description
Technical Field
The utility model belongs to the technical field of LED (light-emitting diode) lamp tubes, and particularly relates to a double-end LED lamp tube.
Background
It is well known that LED tubes have several distinct advantages over conventional fluorescent tubes: the LED lamp tube replaces the fluorescent lamp tube to become the main stream of the market gradually, and the TypeB lamp tube can be directly adapted to the work of an industrial frequency alternating current power grid without a preposed fluorescent lamp ballast or an LED driving power supply, and can directly work only by short-circuiting or bypassing the ballast when the lamp tube is installed, so that the LED lamp tube is very convenient to use, and compared with a single-ended power-on lamp tube, the double-ended power-on lamp tube has fewer modifications to the lamp tube, reduces the labor cost to a greater extent, and is popular in the market.
However, at the same time, the principle of light emission of an LED lamp is completely different from that of a fluorescent lamp, which is a gas discharge, and emits light by forming a current by breaking down the gas, whereas an LED is a solid-state lighting, which emits light by an electronic component itself. Therefore, the LED lamp tube naturally has a hard injury, when one end is inserted into the lamp holder firstly during lamp replacement, the fluorescent lamp is in gas discharge, the gas is not broken down, and the other end is electrically isolated, so that the LED lamp tube is safe; however, the LED lamp tube is a semiconductor electronic element which emits light, and is a conductor, and if the detection isolation mechanism is not provided, the other end of the double-ended LED lamp tube is basically electrified, which may cause a safety accident of human body electric shock. For the above safety risks, UL1993 defines that standard LED tube products requiring double-ended power-on must meet the test requirements of "Risk of electric shock".
Based on the above standard, the current method is mostly used to determine the installation state of the lamp tube, for example, an LED straight tube lamp disclosed in chinese patent application No. 201721224355.4 is provided with a detection module, the pulse current is detected by the detection module, the circuit is complex, the cost is high, and because the detected pulse current flows through the whole circuit, the Peak value and pulse width of the current are large enough, no false detection phenomenon exists, and the design results in low safety and reliability, and theoretically, there is still an electric shock risk.
Disclosure of Invention
To solve the problems set forth in the background art. The utility model provides a double-end LED lamp tube which has the characteristics of meeting the standard requirement of Risk of electric shock and having no electric shock risk.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the double-end LED lamp tube comprises a lamp tube, wherein one end of the lamp tube is connected with a first lamp cap, the other end of the lamp tube is connected with a second lamp cap, a light source assembly and a leakage detection and driving module are arranged in the lamp tube, one end of the light source assembly is electrically connected with the second lamp cap, the other end of the light source assembly is electrically connected with the leakage detection and driving module, and the leakage detection and driving module is electrically connected with the first lamp cap; the leakage detection and driving module comprises a leakage detection circuit, wherein the leakage detection circuit comprises a chip U1, a 7 pin of the chip U1 is connected with one end of a resistor RS2, the other end of the resistor RS2 is connected with a filter circuit and a constant current driving circuit respectively, a 1 pin of the chip U1 is connected with a constant current driving circuit, a 2 pin of the chip U1 is connected with one end of a resistor RS3 and one end of a resistor RS4 respectively, a 3 pin of the chip U1 is connected with one end of a capacitor CS1, a 5 pin of the chip U1 is connected with one end of a resistor RS7, the other end of the resistor RS7 is connected with one end of a resistor RS6, the other end of the resistor RS6 is connected with the negative end of a diode DS2, the positive end of the diode DS2 is connected with an alternating current input end, and the other ends of the resistor RS3, the resistor RS4 and the capacitor CS1 and the 4 pin of the chip U1 are connected with a GND end.
In order to filter the rectified signal output by the rectifier bridge BD1 to generate a filtered signal, the filter circuit further includes an inductor L1, one end of the inductor L1 is connected with one end of the resistor RS1 and one end of the capacitor C1 and the 4 pin of the rectifier bridge DB1, the other end of the inductor L1 is connected with the other end of the resistor RS1, one end of the capacitor C2 and the other end of the resistor RS2, and the other ends of the capacitor C1 and the capacitor C2 are connected with the GND end.
In order to rectify an ac input signal to generate a rectified signal, further, pin 1 of rectifying bridge DB1 is connected to one end of overcurrent protector F1, the other end of overcurrent protector F1 is connected to live wire L, pin 2 of rectifying bridge DB1 is connected to GND terminal, and pin 3 of rectifying bridge DB1 is connected to neutral wire N.
In order to receive the signal after the filter circuit to generate a direct current driving signal, the light source assembly is driven to emit light, further, the constant current driving circuit comprises a diode DS1, the negative electrode of the diode DS1 is respectively connected with the other end of the resistor RS2, one end of the electrolytic CE1, one end of the resistor RS8 and the positive electrode end of the light source assembly, the positive electrode end of the diode DS1 is respectively connected with the 1 pin of the chip U1 and one end of the inductor T1, and the other end of the inductor T1 is respectively connected with the other ends of the electrolytic CE1 and the resistor RS8 and the negative electrode end of the light source assembly.
For being used for constituting the light source, further, the light source subassembly includes light source base plate and a plurality of LED lamp pearl, and wherein, equidistant setting of a plurality of LED lamp pearl is on the light source base plate.
Further, the light source component is connected with the second lamp cap and the electric leakage detection and driving module is connected with the first lamp cap through wires respectively.
In the utility model, the implementation method of the double-end LED lamp tube comprises the following steps:
(one), rectifying an alternating current input signal through a rectifier bridge BD 1;
filtering the rectified signal through a filter circuit;
(III), a detection part is formed by the diode DS2, the resistor RS6 and the resistor RS7 and is used for detecting the voltage of an input end to control the on and off of the first switch M1 in the chip U1, and when the detection voltage set by the internal logic is met, the first switch M1 is turned on, namely a detection circuit forms a loop;
fourth, the resistor RS3 and the resistor RS4 form a sampling resistor, the current on the electric leakage detection circuit is collected through the sampling resistor, and the current is integrated and judged through internal logic to realize the detection of the impedance of an external input end;
and fifthly, according to the impedance detection result, the second switch M2 in the chip U1 is controlled to be turned on and off by an enabling signal so as to judge whether a human body is connected in the power-on state of the lamp tube, thereby achieving the final purpose of preventing the human body from electric shock.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model detects the external input voltage signal through the electric leakage detection circuit to control the on and off of the first switch M1 in the chip U1, when the detection voltage set by the internal logic is met, the first switch M1 is turned on, namely the detection circuit forms a loop, the current on the electric leakage detection circuit is collected through the sampling resistor, the current is integrated and judged through the internal logic, the detection of the impedance of an external input end is realized, and the on and off of the second switch M2 in the chip U1 is controlled through an enabling signal according to the impedance detection result, so as to judge whether a human body is accessed in the power-on state of the lamp tube, thereby achieving the final purpose of preventing the electric shock of the human body;
2. the leakage detection circuit is mainly used for detecting the impedance of an external input end, and interference signals in the circuit are few, so that the current peak value and the pulse width on the leakage detection circuit can be set to be small, and the leakage detection circuit has enough sensitivity, so that the safety is higher;
3. according to the utility model, after the leakage detection is passed, the second switch M2 is turned on by the logic in the chip U1, and a low level is generated at the same time, so that the first switch M1 in the chip U1 is kept in an cut-off state, namely, after the detection is passed, the detection circuit is in an open-circuit state, and the driving main circuit keeps normal operation, so that the reliability is higher.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic diagram of an explosion of a structure of the present utility model;
FIG. 2 is a circuit diagram of the leakage detection and driving module of the present utility model;
FIG. 3 is a diagram of a UL standard body impedance network framework of the present utility model;
FIG. 4 is an internal block diagram of the chip U1 of the present utility model;
FIG. 5 is a schematic diagram of the leakage detection of the present utility model;
FIG. 6 is a circuit diagram of the leakage detection and driving module according to embodiment 2 of the present utility model;
FIG. 7 is a circuit diagram of the leakage detection and driving module according to embodiment 3 of the present utility model;
in the figure: 1. a first lamp cap; 2. a light source assembly; 3. a lamp tube; 4. a second lamp cap; 5. and the electric leakage detection and driving module.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Referring to fig. 1-5, the present utility model provides the following technical solutions: the double-end LED lamp tube comprises a lamp tube 3, wherein the lamp tube 3 comprises a round hollow strip-shaped tube made of glass, a glass coating film or PC (polycarbonate) and the like, the embodiment is preferably made of glass, one end of the lamp tube 3 is connected with a first lamp cap 1, the other end of the lamp tube 3 is connected with a second lamp cap 4, a light source component 2 and a leakage detection and driving module 5 are arranged in the lamp tube 3, one end of the light source component 2 is electrically connected with the second lamp cap 4, the other end of the light source component 2 is electrically connected with the leakage detection and driving module 5, and the leakage detection and driving module 5 is electrically connected with the first lamp cap 1; the leakage detection and driving module 5 comprises a leakage detection circuit, wherein the leakage detection circuit comprises a chip U1, a 7 pin of the chip U1 is connected with one end of a resistor RS2, the other end of the resistor RS2 is connected with a filter circuit and a constant current driving circuit respectively, a 1 pin of the chip U1 is connected with the constant current driving circuit, a 2 pin of the chip U1 is connected with one end of a resistor RS3 and one end of a resistor RS4 respectively, a 3 pin of the chip U1 is connected with one end of a capacitor CS1, a 5 pin of the chip U1 is connected with one end of a resistor RS7, the other end of the resistor RS7 is connected with one end of a resistor RS6, the other end of the resistor RS6 is connected with the negative end of a diode DS2, the positive end of the diode DS2 is connected with a zero line N, and the other ends of the resistor RS3, the resistor RS4 and the capacitor CS1 as well as the 4 pin of the chip U1 are connected with a GND end.
By adopting the technical scheme, the diode DS2, the resistor RS6 and the resistor RS7 form a detection part and are used for detecting the voltage of the input end and supplying power to the VCC inside the chip U1, and meanwhile, a current detection path is formed between the diode DS2 and the 5 pins and between the diode DS2 and the resistor RS 7; the capacitor CS1 is used for maintaining the voltage of the pin U1VCC of the chip; the resistor RS2 is used for supplying power to a second switch M2 controller inside the chip U1; the resistor RS3 and the resistor RS4 are used for sampling the current of the main circuit, and the driving circuit is ensured to output constant current.
The utility model detects the external input voltage signal through the electric leakage detection circuit to control the on and off of the first switch M1 in the chip U1, when the detection voltage set by the internal logic is met, the first switch M1 is turned on, namely the detection circuit forms a loop, the current on the electric leakage detection circuit is collected through the sampling resistor, the current is integrated and judged through the internal logic, the detection of the impedance of an external input end is realized, and the on and off of the second switch M2 in the chip U1 is controlled through an enabling signal according to the impedance detection result, so as to judge whether a human body is connected in the power-on state of the lamp tube (defined according to the UL standard human body impedance network, as shown in figure 3), thereby achieving the final purpose of preventing the human body from electric shock.
Specifically, the filter circuit includes inductance L1, and inductance L1's one end is connected with resistance RS1 and electric capacity C1's one end and rectifier bridge DB 1's 4 foot respectively, and inductance L1's the other end is connected with resistance RS 1's the other end, electric capacity C2's one end and resistance RS 2's the other end respectively, and electric capacity C1 and electric capacity C2's the other end all is connected with the GND end.
By adopting the above technical scheme, the filtering device is used for filtering the rectified signal output by the rectifier bridge BD1 to generate a filtered signal.
Specifically, pin 1 of rectifier bridge DB1 is connected to one end of overcurrent protector F1, overcurrent protector F1 is preferably a fuse, the other end of overcurrent protector F1 is connected to live wire L, pin 2 of rectifier bridge DB1 is connected to GND terminal, and pin 3 of rectifier bridge DB1 is connected to zero line N.
By adopting the technical scheme, the rectifier bridge DB1 is used for rectifying an alternating current input signal to generate a rectified signal; the overcurrent protector F1 is used for protecting a circuit in the case of overcurrent.
Specifically, the constant current driving circuit includes a diode DS1, a cathode of the diode DS1 is connected to the other end of the resistor RS2, one end of the electrolytic CE1, one end of the resistor RS8, and an anode of the light source assembly 2, the anode of the diode DS1 is connected to the 1 pin of the chip U1 and one end of the inductor T1, and the other end of the inductor T1 is connected to the other ends of the electrolytic CE1 and the resistor RS8, and the cathode of the light source assembly 2.
By adopting the technical scheme, the light source module is used for receiving the signal after the filter circuit so as to generate a direct current driving signal and drive the light source module 2 to emit light.
Specifically, the light source assembly 2 includes a light source substrate and a plurality of LED lamp beads, wherein the plurality of LED lamp beads are equidistantly disposed on the light source substrate.
By adopting the technical scheme, the light source is formed.
Specifically, the light source assembly 2 is connected with the second lamp cap 4 and the electric leakage detection and driving module 5 is connected with the first lamp cap 1 through wires respectively.
Example 2
Referring to fig. 6, the present embodiment is different from embodiment 1 in that: specifically, the positive terminal live line L of the diode DS2 is connected.
Example 3
Referring to fig. 7, the present embodiment is different from embodiment 1 in that: specifically, the positive terminal of the diode DS2 and one terminal of the resistor RS6 are connected to the 4 pin of the rectifier bridge DB1, respectively, and the negative terminal of the diode DS2 is connected to the filter circuit.
Example 4
Further, the implementation method of the double-end LED lamp tube provided by the utility model comprises the following steps:
(one), rectifying an alternating current input signal through a rectifier bridge BD 1;
filtering the rectified signal through a filter circuit;
(III), a detection part is formed by the diode DS2, the resistor RS6 and the resistor RS7 and is used for detecting the voltage of an input end to control the on and off of the first switch M1 in the chip U1, and when the detection voltage set by the internal logic is met, the first switch M1 is turned on, namely a detection circuit forms a loop;
fourth, the resistor RS3 and the resistor RS4 form a sampling resistor, the current on the electric leakage detection circuit is collected through the sampling resistor, and the current is integrated and judged through internal logic to realize the detection of the impedance of an external input end;
and fifthly, according to the impedance detection result, the second switch M2 in the chip U1 is controlled to be turned on and off by an enabling signal so as to judge whether a human body is connected in the power-on state of the lamp tube, thereby achieving the final purpose of preventing the human body from electric shock.
In summary, the present utility model controls the on and off of the first switch M1 inside the chip U1 by detecting the external input voltage signal through the leakage detection circuit, when the detection voltage set by the internal logic is satisfied, the first switch M1 is turned on, that is, the detection circuit forms a loop, the current on the leakage detection circuit is collected through the sampling resistor, the current is integrated and judged through the internal logic, the detection of the impedance of the external input terminal is realized, and according to the impedance detection result, the on and off of the second switch M2 inside the chip U1 is controlled through an enable signal, so as to judge whether the human body is connected in the power-on state of the lamp tube, thereby achieving the final purpose of preventing the human body from electric shock; the leakage detection circuit is mainly used for detecting the impedance of an external input end, and interference signals in the circuit are few, so that the current peak value and the pulse width on the leakage detection circuit can be set to be small, and the leakage detection circuit has enough sensitivity, so that the safety is higher; according to the utility model, after the leakage detection is passed, the second switch M2 is turned on by the logic in the chip U1, and a low level is generated at the same time, so that the first switch M1 in the chip U1 is kept in an cut-off state, namely, after the detection is passed, the detection circuit is in an open-circuit state, and the driving main circuit keeps normal operation, so that the reliability is higher.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The utility model provides a bi-polar LED fluorescent tube, includes fluorescent tube, its characterized in that: one end of the lamp tube is connected with a first lamp cap, the other end of the lamp tube is connected with a second lamp cap, a light source assembly and a leakage detection and driving module are arranged in the lamp tube, one end of the light source assembly is electrically connected with the second lamp cap, the other end of the light source assembly is electrically connected with the leakage detection and driving module, and the leakage detection and driving module is electrically connected with the first lamp cap; the leakage detection and driving module comprises a leakage detection circuit, wherein the leakage detection circuit comprises a chip U1, a 7 pin of the chip U1 is connected with one end of a resistor RS2, the other end of the resistor RS2 is connected with a filter circuit and a constant current driving circuit respectively, a 1 pin of the chip U1 is connected with a constant current driving circuit, a 2 pin of the chip U1 is connected with one end of a resistor RS3 and one end of a resistor RS4 respectively, a 3 pin of the chip U1 is connected with one end of a capacitor CS1, a 5 pin of the chip U1 is connected with one end of a resistor RS7, the other end of the resistor RS7 is connected with one end of a resistor RS6, the other end of the resistor RS6 is connected with the negative end of a diode DS2, the positive end of the diode DS2 is connected with an alternating current input end, and the other ends of the resistor RS3, the resistor RS4 and the capacitor CS1 and the 4 pin of the chip U1 are connected with a GND end.
2. The double-ended LED tube of claim 1, wherein: the filter circuit comprises an inductor L1, one end of the inductor L1 is connected with one end of a resistor RS1 and a capacitor C1 and the 4 pin of a rectifier bridge DB1 respectively, the other end of the inductor L1 is connected with the other end of the resistor RS1, one end of a capacitor C2 and the other end of the resistor RS2 respectively, and the other ends of the capacitor C1 and the capacitor C2 are connected with the GND end.
3. The double-ended LED tube of claim 2, wherein: the 1 foot of rectifier bridge DB1 is connected with the one end of overcurrent protector F1, and overcurrent protector F1's the other end is connected with live wire L, and rectifier bridge DB 1's 2 foot is connected with the GND end, and rectifier bridge DB 1's 3 foot is connected with zero line N.
4. The double-ended LED tube of claim 1, wherein: the constant current drive circuit comprises a diode DS1, wherein the cathode of the diode DS1 is respectively connected with the other end of the resistor RS2, one end of the electrolytic CE1, one end of the resistor RS8 and the anode end of the light source component, the anode end of the diode DS1 is respectively connected with the 1 pin of the chip U1 and one end of the inductor T1, and the other end of the inductor T1 is respectively connected with the other ends of the electrolytic CE1 and the resistor RS8 and the cathode end of the light source component.
5. The double-ended LED tube of claim 1, wherein: the light source assembly comprises a light source substrate and a plurality of LED lamp beads, wherein the LED lamp beads are arranged on the light source substrate at equal intervals.
6. The double-ended LED tube of claim 1, wherein: the light source assembly is connected with the second lamp cap, and the electric leakage detection and driving module is connected with the first lamp cap through wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321518788.6U CN220359395U (en) | 2023-06-14 | 2023-06-14 | Double-end LED lamp tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321518788.6U CN220359395U (en) | 2023-06-14 | 2023-06-14 | Double-end LED lamp tube |
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| Publication Number | Publication Date |
|---|---|
| CN220359395U true CN220359395U (en) | 2024-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321518788.6U Active CN220359395U (en) | 2023-06-14 | 2023-06-14 | Double-end LED lamp tube |
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| Country | Link |
|---|---|
| CN (1) | CN220359395U (en) |
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2023
- 2023-06-14 CN CN202321518788.6U patent/CN220359395U/en active Active
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