Compatible lighting device

Abstract

The compatible lighting device comprises a class A driving circuit (including a first rectification module, a firewire switch module, a zero wire switch module, a first surge protection module and a filter module), a firewire input end, a class B driving circuit (including a second rectification module, a leakage detection module, a second surge protection module and a constant current driving module), a zero wire input end and a light source. The first rectification module is connected with the firewire switch module and the first surge protection module. The firewire switch module is connected with the filter module, and the zero wire switch module is connected with the filter module. The firewire input end is connected with the first rectification module. The second rectification module is connected with the first surge protection module. The leakage detection module is connected with the second surge protection module. The second surge protection module is connected with the constant current driving module. The zero wire input end is connected with the second rectification module. The light source is connected with the first surge protection module, the filter module, the zero wire switch module, the second rectification module, the leakage detection module and the constant current driving module.

Description

Technical Field

[0001] This invention relates to a lighting device, and more particularly to a compatible lighting device. Background Technology

[0002] To meet market demands for compatibility with both electronic ballasts and AC power, Type A+Type B fluorescent tubes have been developed. Type A+Type B tubes have a built-in driver. This driver can be compatible with both electronic ballasts and AC power; thus, Type A+Type B tubes are compatible with both electronic ballasts and AC power.

[0003] The input voltage range of existing Class A+B fluorescent lamps is typically between 120V and 277V. Some existing Class A+B fluorescent lamps can support an input voltage of 347V; however, in order to achieve leakage protection, these lamps are not compatible with input voltages of 120V and 277V. Summary of the Invention

[0004] According to an embodiment of the present invention, a compatible lighting device is provided, comprising a Class A driving circuit, a live wire input terminal, a Class B driving circuit, a neutral wire input terminal, and a light source. The Class A driving circuit includes a first rectifier module, a live wire switch module, a neutral wire switch module, a first surge protection module, and a filter module. The first rectifier module is connected to the live wire switch module and the first surge protection module. The live wire switch module is connected to the filter module, and the neutral wire switch module is connected to the filter module. The live wire input terminal is connected to the first rectifier module. The Class B driving circuit includes a second rectifier module, a leakage current detection module, a second surge protection module, and a constant current driving module. The second rectifier module is connected to the first surge protection module. The leakage current detection module is connected to the second surge protection module. The second surge protection module is connected to the constant current driving module. The neutral wire input terminal is connected to the second rectifier module. The light source is connected to the first surge protection module, the filter module, the neutral wire switch module, the second rectifier module, the leakage current detection module, and the constant current driving module. In one embodiment, the live wire switch module includes a live wire capacitor voltage divider unit and a live wire switch unit. The live wire switching unit receives the voltage output from the first output terminal of the electronic ballast through the live wire capacitor voltage divider unit to enter the conduction state.

[0005] In one embodiment, the live wire capacitor voltage divider unit includes a first voltage divider capacitor and a second voltage divider capacitor connected in series.

[0006] In one embodiment, the live wire switch module further includes a live wire buck rectifier unit and a live wire commutation unit. The live wire switch unit is connected to the filter module and the live wire capacitor voltage divider unit through the live wire commutation unit, and is also connected to the live wire capacitor voltage divider unit through the live wire buck rectifier unit.

[0007] In one embodiment, the live wire switch module further includes a live wire protection unit. The live wire protection unit is connected in parallel with the live wire switch unit.

[0008] In one embodiment, the neutral line switch module includes a neutral line capacitor voltage divider unit and a neutral line switch unit. The neutral line switch unit receives the voltage output from the second output terminal of the electronic ballast through the neutral line capacitor voltage divider unit to enter the conduction state.

[0009] In one embodiment, the neutral terminal capacitor voltage divider unit includes a third voltage divider capacitor and a fourth voltage divider capacitor connected in series.

[0010] In one embodiment, the neutral line switch module further includes a neutral line step-down rectifier unit and a neutral line commutation unit. The neutral line switch unit is connected to the filter module and the neutral line capacitor voltage divider unit through the neutral line commutation unit, and is also connected to the neutral line capacitor voltage divider unit through the neutral line step-down rectifier unit.

[0011] In one embodiment, the neutral wire switch module further includes a neutral wire protection unit. The neutral wire protection unit is connected in parallel with the neutral wire switch unit.

[0012] In one embodiment, the light source includes one or more light-emitting diodes.

[0013] As described above, the compatible lighting device according to the embodiments of the present invention may have one or more of the following advantages:

[0014] (1) In one embodiment of the present invention, the lighting device includes a Class A driving circuit, a live wire input terminal, a Class B driving circuit, a neutral wire input terminal, and a light source. The Class A driving circuit includes a first rectifier module, a live wire switch module, a neutral wire switch module, a first surge protection module, and a filter module. The first rectifier module is connected to the live wire switch module and the first surge protection module. The live wire switch module is connected to the filter module, and the neutral wire switch module is connected to the filter module. The live wire input terminal is connected to the first rectifier module. The Class B driving circuit includes a second rectifier module, a leakage current detection module, a second surge protection module, and a constant current driving module. The second rectifier module is connected to the first surge protection module. The leakage current detection module is connected to the second surge protection module. The second surge protection module is connected to the constant current driving module. The neutral wire input terminal is connected to the second rectifier module. The light source is connected to the first surge protection module, the filter module, the neutral wire switch module, the second rectifier module, the leakage current detection module, and the constant current driving module. The live wire switch module includes a live wire terminal capacitor voltage divider unit and a live wire terminal switch unit. The live wire switching unit receives the voltage output from the first output terminal of the electronic ballast through the live wire capacitor voltage divider unit to enter the conduction state. The neutral wire switching module has a neutral wire capacitor voltage divider unit and a neutral wire switching unit. The neutral wire switching unit receives the voltage output from the second output terminal of the electronic ballast through the neutral wire capacitor voltage divider unit to enter the conduction state. Therefore, when the lighting device enters the ballast mode based on high-frequency signals, the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit in the Class A drive circuit are in a low-impedance state, which can achieve the voltage division function to generate voltage and respectively turn on the live wire switching unit and the neutral wire switching unit, thereby driving the light source. The leakage current detection module of the Class B drive circuit cannot recognize high-frequency signals, so it is in a stopped state. When the lighting device enters the mains power mode based on low-frequency signals, the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit in the Class A drive circuit are in a high-impedance state, which can isolate low-frequency signals and keep the Class A drive circuit in a stopped state. The leakage detection module of the Class B drive circuit can identify low-frequency signals, thus entering operation to perform leakage detection; the second surge protection module and the constant current drive module also enter operation to drive the light source. Through the above circuit design and operation mechanism, the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit can achieve high-frequency signal voltage division and low-frequency signal isolation functions. Therefore, the lighting device is compatible with both electronic ballasts and mains power, thus meeting the requirements of wide voltage applications (120~347V), allowing the lighting device to operate normally under different voltage environments.

[0015] (2) In one embodiment of the present invention, the lighting device has a special circuit design and operating mechanism that enables the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit to achieve low-frequency signal isolation. Thus, when the lighting device enters a low-frequency signal-based mains power mode, the leakage current detection module of the Class B drive circuit will not be affected by leakage current interference from the Class A drive circuit, preventing malfunction or false alarms, while the constant current drive module can still operate normally to drive the light source. Therefore, the leakage current detection module can effectively perform leakage current detection to achieve leakage current protection, enabling the lighting device to operate stably in mains power mode.

[0016] (3) In one embodiment of the present invention, the lighting device has a special circuit design and operating mechanism that enables the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit to achieve high-frequency signal voltage division. Thus, when the lighting device enters the ballast mode based on high-frequency signals, the voltage applied to the live wire switching unit and the neutral wire switching unit can be reduced. This mechanism can prevent abnormal states in the live wire switching unit and the neutral wire switching unit, and can prevent high-voltage interference with the constant current drive module. Therefore, the lighting device can also operate stably in ballast mode.

[0017] (4) In one embodiment of the present invention, the lighting device can not only be used as a Type A+Type B lamp, but also can be applied to lamps of various sizes, such as T8, T9, T10 and T12, to meet the needs of different applications. Therefore, the lighting device has a wider range of applications and can be used more flexibly.

[0018] (5) In one embodiment of the present invention, the lighting device is designed simply, thus achieving the desired effect without significantly increasing costs. Furthermore, the efficiency and operational stability of the lighting device are effectively improved. Therefore, the practicality of the lighting device can be greatly enhanced, enabling it to meet market demands. Attached Figure Description

[0019] Figure 1 This is a block diagram of the circuit structure of a compatible lighting device according to an embodiment of the present invention.

[0020] Figure 2 This is a perspective view of a compatible lighting device according to an embodiment of the present invention.

[0021] Figure 3 This is a first schematic diagram of a ballast mode for a compatible lighting device according to an embodiment of the present invention.

[0022] Figure 4 This is a second schematic diagram of a ballast mode for a compatible lighting device according to an embodiment of the present invention.

[0023] Figure 5 This is a first schematic diagram of the mains power mode of a compatible lighting device according to an embodiment of the present invention.

[0024] Figure 6 This is a second schematic diagram of the mains power mode of a compatible lighting device according to an embodiment of the present invention.

[0025] Figure 7 This is a circuit diagram of a compatible lighting device according to another embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1: Lighting fixture: 11-Class A drive circuit; 111-First rectifier module; 112-Live wire switch module; 1121-Live wire terminal switch unit; 1122-Live wire terminal capacitor voltage divider unit; 1123-Live wire terminal step-down rectifier unit; 1124-Live wire terminal commutation unit; 1125-Live wire terminal protection unit; 1126-Live wire terminal adjustment unit; 113-First surge protection module; 114-Neutral wire switch module; 1141-Neutral wire terminal switch unit ; 1142-Neutral terminal capacitor voltage divider unit; 1143-Neutral terminal step-down rectifier unit; 1144-Neutral terminal commutation unit; 1145-Neutral terminal protection unit; 1146-Neutral terminal adjustment unit; 115-Filter module; 116-Connecting board; 12-Class B drive circuit; 121-Second rectifier module; 122-Leakage detection module; 123-Second surge protection module; 124-Constant current drive module; 13-Light source; Lin-Live wire Input terminals; Nin - Neutral input terminal; D+ - DC positive terminal; D- - DC negative terminal; L+ - Light source positive terminal; L- - Light source negative terminal; Nin' - Neutral terminal; TB - Transistor body; CP1, CP2 - End caps; Q1 - First transistor; Q2 - Second transistor; D1~D19 - First diode~Nineteenth diode; R1~R10 - First resistor~Tenth resistor; P1~P4 - First adjusting resistor~Fourth adjusting resistor; C1~C4 - First capacitor~Fourth capacitor; K1~K4 - First voltage divider capacitor~Fourth voltage divider capacitor; EC1 - First electrolytic capacitor; EC2 - Second electrolytic capacitor; Z1 - First Zener diode; Z2 - Second Zener diode; S1 - First transient voltage suppression diode; S2 - Second transient voltage suppression (TVS) diode; Fs1 - Fuse; N1~N16 - First node~Sixteenth node; GD - Ground point; A1, A2, A3, A4 - Arrows.

[0028] The following detailed description of the features and advantages of the present invention is sufficient to enable anyone skilled in the art to understand the technical content of the present invention and implement it accordingly. Based on the content disclosed in this specification, the claims and drawings, anyone skilled in the art can easily understand the purpose and advantages of this creation. Detailed Implementation

[0029] The following description, with reference to the accompanying drawings, illustrates embodiments of a compatible lighting device according to the present invention. For clarity and ease of illustration, the dimensions and proportions of the components in the drawings may be exaggerated or reduced. In the following description and / or claims, when a component is referred to as "connected" or "coupled" to another component, it may be directly connected or coupled to that other component or there may be an intervening component; while when a component is referred to as "directly connected" or "directly coupled" to another component, there is no intervening component. Other terms used to describe the relationship between components or layers should be interpreted in the same manner. For ease of understanding, the same components in the following embodiments are indicated by the same symbols.

[0030] Please see Figure 1 The figure shows a block diagram of the circuit structure of a compatible lighting device according to an embodiment of the present invention. As shown, the lighting device 1 includes a Class A drive circuit 11, a live wire input terminal Lin, a Class B drive circuit 12, a neutral wire input terminal Nin, and a light source 13.

[0031] The Class A drive circuit 11 includes a first rectifier module 111, a live wire switch module 112, a first surge protection module 113, a neutral wire switch module 114, and a filter module 115. The first rectifier module 111 is connected to the live wire switch module 112 and the first surge protection module 113. The live wire switch module 112 is connected to the filter module 115. The neutral wire switch module 114 is connected to the filter module 115. The live wire switch module 112 includes a live wire capacitor voltage divider unit and a live wire switch unit. The live wire capacitor voltage divider unit includes multiple capacitors connected in series.

[0032] The live wire input terminal Lin is connected to the first rectifier module 111. The live wire input terminal Lin is also connected to the first output terminal of the mains power supply and the first output terminal of the electronic ballast.

[0033] The Class B drive circuit 12 includes a second rectifier module 121, a leakage current detection module 122, a second surge protection module 123, and a constant current drive module 124. The second rectifier module 121 is connected to the first surge protection module 113. The leakage current detection module 122 is connected to the second surge protection module 123. The second surge protection module 123 is connected to the constant current drive module 124. The neutral line switch module 114 has a neutral line capacitor voltage divider unit and a neutral line switch unit. The neutral line capacitor voltage divider unit includes multiple capacitors connected in series. In one embodiment, the constant current drive module 124 can be any existing constant current LED driver, which should be well known to those skilled in the art and will not be described in detail here. In one embodiment, the second surge protection module 123 can be any existing FCC-compliant filter circuit with integrated surge protection, which should be well known to those skilled in the art and will not be described in detail here. In one embodiment, the leakage current detection module 122 may be a JW1818 leakage current protection controller from JOULWATT, other existing leakage current protection controllers, or circuits with similar functions, which should be well known to those skilled in the art, and therefore will not be described in detail here.

[0034] The neutral input terminal Nin is connected to the second rectifier module 121. The neutral input terminal Nin is also connected to the second output terminal of the mains power supply and the second output terminal of the electronic ballast.

[0035] The light source 13 is connected to the first surge protection module 113, the filter module 115, the neutral wire switch module 114, the second rectifier module 121, the leakage current detection module 122, and the constant current drive module 124. The light source 13 includes one or more light-emitting diodes (LEDs).

[0036] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or alterations made to the compatible lighting device according to this embodiment should still be included within the patent scope of the invention.

[0037] Please see Figure 2 This is a perspective view of a compatible lighting device according to an embodiment of the present invention. As shown, the lighting device 1 can be a lamp tube, which includes a tube body TB, end caps CP1 and CP2. End caps CP1 and CP2 are respectively disposed at both ends of the tube body TB. The neutral wire input terminal Nin is disposed on the end cap CP2, while the live wire input terminal Lin is disposed on the end cap CP1 (the live wire input terminal Lin and the neutral wire input terminal Nin are the pins of the lamp tube, which are connected to the two output terminals of the mains power and the two output terminals of the electronic ballast).

[0038] The Class A drive circuit 11 can be located inside the end cover CP1, so that the live wire input terminal Lin can be connected to the first rectifier module 111 of the Class A drive circuit 11.

[0039] The Class B drive circuit 12 can be located inside the end cover CP2, so that the neutral input terminal Nin can be connected to the second rectifier module 121 of the Class B drive circuit 12.

[0040] In another embodiment, the lighting device 1 may also be other existing lighting devices, not limited to lamps.

[0041] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or alterations made to the compatible lighting device according to this embodiment should still be included within the patent scope of the invention.

[0042] Please see Figure 3 and Figure 4 These are first and second schematic diagrams illustrating a ballast mode for a compatible lighting device according to an embodiment of the present invention. Figure 3 As shown, when the lighting device 1 enters the ballast mode based on high-frequency signals, the electrical energy output from the first output terminal of the electronic ballast is input to the live wire input terminal Lin, and then passes through the first rectifier module 111, the live wire switch module 112, and the filter module 115 before reaching the light source 13, as indicated by arrow A1 in the figure (the electrical energy output from the first output terminal of the electronic ballast only passes through the fuse Fs1 of the first rectifier module 111, and does not pass through the rectifier circuit within the first rectifier module 111). Figure 4 As shown, the electrical energy output from the second output terminal of the electronic ballast is input to the neutral input terminal Nin, and then passes through the second rectifier module 121, the neutral switch module 114, and the filter module 115 before reaching the light source 13, as indicated by arrow A2 in the figure (the electrical energy output from the second output terminal of the electronic ballast only passes through the second rectifier module 121, and not through the rectifier circuit within the second rectifier module 121). Thus, the light source 13 can be driven in ballast mode.

[0043] As mentioned above, the live wire switch module 112 includes a live wire capacitor voltage divider unit and a live wire switch unit. The live wire capacitor voltage divider unit includes multiple capacitors connected in series. The neutral wire switch module 114 has a neutral wire capacitor voltage divider unit and a neutral wire switch unit. The neutral wire capacitor voltage divider unit includes multiple capacitors connected in series. Thus, when the lighting device 1 enters the ballast mode based on a high-frequency signal, the live wire switch unit receives the voltage output from the first output terminal of the electronic ballast through the live wire capacitor voltage divider unit to enter the conduction state (the live wire capacitor voltage divider unit performs the voltage divider function). The neutral wire switch unit receives the voltage output from the second output terminal of the electronic ballast through the neutral wire capacitor voltage divider unit to enter the conduction state (the neutral wire capacitor voltage divider unit performs the voltage divider function). In this way, the light source 13 can be driven in ballast mode.

[0044] When the lighting device 1 enters the ballast mode based on high-frequency signals, the voltage applied to the live wire and neutral wire switching units can be reduced. This mechanism can prevent abnormal states of the live wire and neutral wire switching units and avoid high-voltage interference with the constant current drive module 124. Furthermore, since the leakage current detection module 122 cannot recognize high-frequency signals, it will not mistakenly activate the constant current drive module 124. Therefore, the lighting device 1 can also operate stably in ballast mode.

[0045] Please see Figure 5 and Figure 6 These are first and second schematic diagrams illustrating the mains power mode of a compatible lighting device according to an embodiment of the present invention. Figure 5 As shown, when the lighting device 1 enters the low-frequency signal-based mains power mode, the electrical energy output from the first output terminal of the mains power is input to the live wire input terminal Lin, and then passes through the first rectifier module 111, the first surge protection module 113, the leakage current detection module 122, the second surge protection module 123, and the constant current drive module 124, before reaching the light source 13, as shown by arrow A3 in the figure (the electrical energy output from the first output terminal of the mains power passes through the rectifier circuit in the first rectifier module 111). Figure 6 As shown, the electrical energy output from the second output terminal of the mains power supply is input to the neutral input terminal Nin, and then passes through the second rectifier module 121, the first surge protection module 113, the leakage current detection module 122, the second surge protection module 123, and the constant current drive module 124 before reaching the light source 13, as indicated by arrow A4 in the figure (the electrical energy output from the second output terminal of the mains power supply passes through the rectifier circuit within the second rectifier module 121). Thus, the light source 13 can be driven in mains power mode.

[0046] Since the voltage divider units at the live wire and neutral wire ends are formed by series capacitors, they can achieve effective low-frequency signal isolation. Thus, when the lighting device 1 enters the low-frequency signal-based mains power mode, the leakage detection module 122 of the Class B drive circuit 12 will not be affected by leakage interference from the Class A drive circuit 11, preventing malfunction or false alarms. Meanwhile, the constant current drive module 124 can operate normally to drive the light source 13. Therefore, the leakage detection module 122 can effectively perform leakage detection to achieve leakage protection, enabling the lighting device 1 to operate stably in mains power mode.

[0047] Through the circuit design and operating mechanism described above, the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit can achieve high-frequency signal voltage division and low-frequency signal isolation functions. Thus, the lighting device is compatible with both electronic ballasts and mains power, meeting the requirements of a wide voltage range (120~347V), allowing it to operate normally under different voltage conditions.

[0048] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or alterations made to the compatible lighting device according to this embodiment should still be included within the patent scope of the invention.

[0049] It is worth noting that the input voltage range of existing Class A+B fluorescent tubes is typically between 120V and 277V. Some existing Class A+B fluorescent tubes can support an input voltage of 347V; however, in order to achieve leakage protection, these tubes are not compatible with input voltages of 120V and 277V. In contrast, according to an embodiment of the present invention, the lighting device includes a Class A drive circuit, a live wire input terminal, a Class B drive circuit, a neutral wire input terminal, and a light source. The Class A drive circuit includes a first rectifier module, a live wire switch module, a neutral wire switch module, a first surge protection module, and a filter module. The first rectifier module is connected to the live wire switch module and the first surge protection module. The live wire switch module is connected to the filter module, and the neutral wire switch module is connected to the filter module. The live wire input terminal is connected to the first rectifier module. The Class B drive circuit includes a second rectifier module, a leakage detection module, a second surge protection module, and a constant current drive module. The second rectifier module is connected to the first surge protection module. The leakage detection module is connected to the second surge protection module. The second surge protection module is connected to the constant current drive module. The neutral input terminal is connected to the second rectifier module. The light source is connected to the first surge protection module, filter module, neutral switch module, second rectifier module, leakage detection module, and constant current drive module. The live wire switch module includes a live wire capacitor voltage divider unit and a live wire switch unit. The live wire switch unit receives the voltage output from the first output terminal of the electronic ballast through the live wire capacitor voltage divider unit to enter the conduction state. The neutral wire switch module has a neutral wire capacitor voltage divider unit and a neutral wire switch unit. The neutral wire switch unit receives the voltage output from the second output terminal of the electronic ballast through the neutral wire capacitor voltage divider unit to enter the conduction state. Therefore, when the lighting device enters the ballast mode based on high-frequency signals, the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit in the Class A drive circuit are in a low-impedance state, which can achieve the voltage division function to generate voltage and respectively turn on the live wire switch unit and the neutral wire switch unit, thereby driving the light source. The leakage detection module of the Class B drive circuit cannot recognize high-frequency signals, so it is in a stopped state. When the lighting fixture enters the low-frequency signal-based AC power mode, the live wire and neutral wire capacitor divider units in the Class A drive circuit are in a high-impedance state, isolating low-frequency signals and stopping the Class A drive circuit. The leakage detection module of the Class B drive circuit can identify low-frequency signals and thus enters the operating state to perform leakage detection; the second surge protection module and constant current drive module also enter the operating state to drive the light source. Through the above circuit design and operating mechanism, the live wire and neutral wire capacitor divider units can achieve high-frequency signal voltage division and low-frequency signal isolation functions. Therefore, the lighting fixture is compatible with both electronic ballasts and AC power, meeting wide voltage application requirements (120~347V) and allowing it to operate normally under different voltage environments.

[0050] Furthermore, according to embodiments of the present invention, the lighting device has a special circuit design and operating mechanism that enables the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit to achieve low-frequency signal isolation. Thus, when the lighting device enters a low-frequency signal-based mains power mode, the leakage detection module of the Class B drive circuit will not be affected by leakage interference from the Class A drive circuit, preventing malfunction or false alarms, while the constant current drive module can still operate normally to drive the light source. Therefore, the leakage detection module can effectively perform leakage detection to achieve leakage protection, enabling the lighting device to operate stably in mains power mode.

[0051] Furthermore, according to embodiments of the present invention, the lighting device has a special circuit design and operating mechanism that enables the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit to achieve high-frequency signal voltage division. Thus, when the lighting device enters the ballast mode based on high-frequency signals, the voltage applied to the live wire switching unit and the neutral wire switching unit can be reduced. This mechanism can prevent abnormal states of the live wire switching unit and the neutral wire switching unit, and can prevent high-voltage interference with the constant current drive module. Therefore, the lighting device can also operate stably in ballast mode.

[0052] Furthermore, according to embodiments of the present invention, the lighting device can not only be used as Type A+Type B lamps, but also as lamps of various sizes, such as T8, T9, T10, and T12, to meet the needs of different applications. Therefore, the lighting device has a wider range of applications and is more flexible in use.

[0053] Furthermore, according to embodiments of the present invention, the lighting device is simple in design, thus achieving the desired effect without significantly increasing costs. In addition, the efficiency and operational stability of the lighting device are effectively improved. Therefore, the practicality of the lighting device is greatly enhanced, enabling it to meet market demands. As can be seen from the above, the compatible lighting device according to embodiments of the present invention can indeed achieve excellent technical results.

[0054] Please see Figure 7 This is a circuit diagram of a compatible lighting device according to another embodiment of the present invention. Figure 7This example illustrates one circuit design of the Class A drive circuit 11 for the lighting device 1. However, this embodiment is merely an example and not a limitation. The Class A drive circuit 11 can be adjusted according to actual needs and is not limited to the content disclosed in this embodiment. As shown in the figure, the Class A drive circuit 11 includes a first rectifier module 111, a live wire switch module 112, a first surge protection module 113, a neutral wire switch module 114, and a filter module 115. The Class A drive circuit 11 also includes a connecting plate 116, which is connected to the light source 13. The connecting plate 116 includes a DC positive terminal D+, a DC negative terminal D-, a light source positive terminal L+, a light source negative terminal L-, and a neutral wire terminal Nin' (the neutral wire terminal Nin' can be connected to the neutral input terminal Nin through a second rectifier module 121; the circuit structure of the second rectifier module 121 is similar to that of the first rectifier module 111, but it may be without a fuse). The DC positive terminal D+ and the DC negative terminal D- are connected to the first surge protection module 113. The positive electrode L+ and negative electrode L- of the light source are connected to the filter module 115. The structure of the connecting plate 116 is part of a common existing light source plate and should be well known to those skilled in the art, so it will not be described in detail here.

[0055] The live wire switch module 112 includes a live wire terminal switch unit 1121, a live wire terminal capacitor voltage divider unit 1122, a live wire terminal step-down rectifier unit 1123, a live wire terminal commutation unit 1124, a live wire terminal protection unit 1125, and a live wire terminal adjustment unit 1126. The live wire terminal switch unit 1121 is connected to the filter module 115 and the live wire terminal capacitor voltage divider unit 1122 through the live wire terminal commutation unit 1124, and is connected to the live wire terminal capacitor voltage divider unit 1122 through the live wire terminal step-down rectifier unit 1123.

[0056] The live-wire switching unit 1121 includes a first transistor Q1. The source of the first transistor Q1 is connected to a first node N1; the drain of the first transistor Q1 is connected to a second node N2; the gate of the first transistor Q1 is connected to a third node N3; and the first node N1 is connected to ground GD. The first transistor Q1 may be a metal-oxide-semiconductor field-effect transistor (MOSFET). In another embodiment, the first transistor Q1 may also be a bipolar junction transistor (BJT) or other similar components.

[0057] The live wire commutation unit 1124 includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4. One end of the first diode D1 is connected to the fourth node N4, which is connected to one of the output terminals of the filter module 115; the other end of the first diode D1 is connected to the second node N2. One end of the second diode D2 is connected to the fifth node N5; the other end of the second diode D2 is connected to the second node N2. One end of the third diode D3 is connected to the fifth node N5; the other end of the third diode D3 is connected to the first node N1. One end of the fourth diode D4 is connected to the fourth node N4; the other end of the fourth diode D4 is connected to the first node N1.

[0058] The live-wire step-down rectifier unit 1123 includes a first resistor R1, a first capacitor C1, a first Zener diode Z1, a fifth diode D5, a sixth diode D6, a second capacitor C2, and a second resistor R2. The two ends of the first resistor R1 are connected to the first node N1 and the third node N3, respectively. The two ends of the first capacitor C1 are connected to the first node N1 and the third node N3, respectively. The two ends of the first Zener diode Z1 are connected to the first node N1 and the third node N3, respectively. The two ends of the fifth diode D5 are connected to the first node N1 and the sixth node N6, respectively. The two ends of the sixth diode D6 are connected to the third node N3 and the sixth node N6, respectively. The two ends of the second capacitor C2 are connected to the sixth node N6 and one end of the second resistor R2, respectively. The other end of the second resistor R2 is connected to the seventh node N7.

[0059] The live wire capacitor voltage divider unit 1122 includes a first voltage divider capacitor K1 and a second voltage divider capacitor K2 connected in series. The two ends of the first voltage divider capacitor K1 are connected to the fifth node N5 and the seventh node N7, respectively. The two ends of the second voltage divider capacitor K2 are connected to the seventh node N7 and the eighth node N8, respectively; the eighth node N8 is connected to the first rectifier module 111.

[0060] The live wire protection unit 1125 includes a first transient voltage suppression (TVS) diode S1. The two ends of the first transient voltage suppression (TVS) diode S1 are connected to the second node N2 and the first node N1, respectively, so that it is connected in parallel with the live wire switching unit 1121.

[0061] The live wire adjustment unit 1126 includes a first adjustment resistor P1 and a second adjustment resistor P2 connected in series. The live wire adjustment unit 1126 is connected in parallel with the live wire capacitor voltage divider unit 1122. The current generated by the discharge of the live wire capacitor voltage divider unit 1122 passes through the live wire adjustment unit 1126 to prevent electric shock.

[0062] The neutral wire switch module 114 includes a neutral wire terminal switch unit 1141, a neutral wire terminal capacitor voltage divider unit 1142, a neutral wire terminal step-down rectifier unit 1143, a neutral wire terminal commutation unit 1144, a neutral wire terminal protection unit 1145, and a neutral wire terminal adjustment unit 1146. The neutral wire terminal switch unit 1141 is connected to the filter module 115 and the neutral wire terminal capacitor voltage divider unit 1142 through the neutral wire terminal commutation unit 1144, and is connected to the neutral wire terminal capacitor voltage divider unit 1142 through the neutral wire terminal step-down rectifier unit 1143.

[0063] The neutral terminal switching unit 1141 includes a second transistor Q2. The source of the second transistor Q2 is connected to the ninth node N9; the drain of the second transistor Q2 is connected to the tenth node N10; the gate of the second transistor Q2 is connected to the eleventh node N11; and the ninth node N9 is connected to ground GD. The second transistor Q2 may be a gold oxide field-effect transistor. In another embodiment, the second transistor Q2 may also be a bipolar junction transistor or other similar component.

[0064] The neutral-line commutation unit 1144 includes a seventh diode D7, an eighth diode D8, a ninth diode D9, and a tenth diode D10. One end of the seventh diode D7 is connected to the twelfth node N12, which is connected to the other output terminal of the filter module 115; the other end of the seventh diode D7 is connected to the ninth node N9. One end of the eighth diode D8 is connected to the twelfth node N12; the other end of the eighth diode D8 is connected to the tenth node N10. One end of the ninth diode D9 is connected to the thirteenth node N13; the other end of the ninth diode D9 is connected to the tenth node N10. One end of the tenth diode D10 is connected to the thirteenth node N13; the other end of the ninth diode D9 is connected to the ninth node N9.

[0065] The neutral-line step-down rectifier unit 1143 includes a third resistor R3, a third capacitor C3, a second Zener diode Z2, an eleventh diode D11, a twelfth diode D12, a fourth capacitor C4, and a fourth resistor R4. The two ends of the third resistor R3 are connected to the ninth node N9 and the eleventh node N11, respectively. The two ends of the third capacitor C3 are connected to the ninth node N9 and the eleventh node N11, respectively. The two ends of the second Zener diode Z2 are connected to the ninth node N9 and the eleventh node N11, respectively. The two ends of the eleventh diode D11 are connected to the ninth node N9 and the fourteenth node N14, respectively. The two ends of the twelfth diode D12 are connected to the eleventh node N11 and the fourteenth node N14, respectively. The two ends of the fourth capacitor C4 are connected to the fourteenth node N14 and one end of the fourth resistor R4, respectively. The other end of the fourth resistor R4 is connected to the fifteenth node N15.

[0066] The neutral terminal capacitor voltage divider unit 1142 includes a third voltage divider capacitor K3 and a fourth voltage divider capacitor K4 connected in series. The two ends of the third voltage divider capacitor K3 are connected to the thirteenth node N13 and the fifteenth node N15, respectively. The two ends of the fourth voltage divider capacitor K4 are connected to the fifteenth node N15 and the sixteenth node N16, respectively; the sixteenth node N16 is connected to the neutral terminal adjustment unit 1146.

[0067] The neutral line protection unit 1145 includes a second transient voltage suppression diode S2. The two ends of the second transient voltage suppression diode S2 are connected to the tenth node N10 and the ninth node N9, respectively, so that it is connected in parallel with the neutral line switch unit 1141.

[0068] The neutral line adjustment unit 1146 includes a third adjustment resistor P3 and a fourth adjustment resistor P4 connected in series. The neutral line adjustment unit 1146 is connected in parallel with the neutral line capacitor voltage divider unit 1142. The current generated by the discharge of the neutral line capacitor voltage divider unit 1142 passes through the neutral line adjustment unit 1146 to prevent electric shock.

[0069] The first rectifier module 111 may be a half-bridge rectifier, which includes a fuse Fs1, a thirteenth diode D13, and a fourteenth diode D14. The first rectifier module 111 should be well known to those skilled in the art, and therefore will not be described in detail here.

[0070] The first surge protection module 113 can be an RDC surge protection circuit, which includes a fifteenth diode D15, a first electrolytic capacitor EC1, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. In another embodiment, the first surge protection module 113 can also be a surge protector (SPD) or other existing similar circuits, which should be well known to those skilled in the art, and therefore will not be described in detail here.

[0071] The filter module 115 can be a high-frequency rectification / filtering module, which includes a sixteenth diode D16, a seventeenth diode D17, an eighteenth diode D18, a nineteenth diode D19, a second electrolytic capacitor EC2, and a tenth resistor R10. In another embodiment, the filter module 115 can also be other circuits with similar functions, which should be well known to those skilled in the art, and therefore will not be described in detail here.

[0072] As mentioned above, the live wire capacitor voltage divider unit 1122 includes a first voltage divider capacitor K1 and a second voltage divider capacitor K2 connected in series. For example, the capacitance of the second voltage divider capacitor K2 is approximately half that of the first voltage divider capacitor K1. The voltage output from the first output terminal of the electronic ballast is input to the live wire input terminal Lin, and passes through the fuse Fs1 of the first rectifier module 111, and then through the first voltage divider capacitor K1 and the second voltage divider capacitor K2; at this time, the voltage of the first voltage divider capacitor K1 is approximately 1 / 2 of the voltage of the second voltage divider capacitor K2 (or the voltage of the first voltage divider capacitor K1 is less than 1 / 2 of the voltage of the second voltage divider capacitor K2). The voltage of the first voltage divider capacitor K1 is processed by the live wire buck rectifier unit 1123 to provide a start-up voltage to the first transistor Q1 (live wire switching unit 1121), causing the first transistor Q1 to conduct. Similarly, the neutral wire capacitor voltage divider unit 1142 includes a third voltage divider capacitor K3 and a fourth voltage divider capacitor K4 connected in series. For example, the capacitance of the fourth voltage divider capacitor K4 is approximately half that of the third voltage divider capacitor K3. The voltage output from the second output terminal of the electronic ballast is input to the neutral input terminal Nin, and after passing through the second rectifier module 121, it is input to the neutral terminal Nin' (this voltage does not pass through the rectifier circuit of the second rectifier module 121), and then divided by the third voltage divider capacitor K3 and the fourth voltage divider capacitor K4; at this time, the voltage of the third voltage divider capacitor K3 is approximately 1 / 2 of the voltage of the fourth voltage divider capacitor K4 (or the voltage of the third voltage divider capacitor K3 is less than 1 / 2 of the voltage of the fourth voltage divider capacitor K4). The voltage of the third voltage divider capacitor K3 is processed by the neutral terminal step-down rectifier unit 1143 to provide the start-up voltage to the second transistor Q2 (neutral terminal switching unit 1141), causing the second transistor Q2 to conduct.

[0073] The neutral terminal commutation unit 1144 forms a commutation switch. The sinusoidal current is output through the seventh diode D7, the eighth diode D8, the ninth diode D9 and the tenth diode D10 to the eighteenth diode D18 and the nineteenth diode D19 to form a DC voltage to drive the light source 13 to emit light, thus forming a complete circuit.

[0074] The live wire protection unit 1125 provides a voltage clamping function to prevent the first transistor Q1 (live wire switching unit 1121) from being damaged by overvoltage. Similarly, the neutral wire protection unit 1145 provides a voltage clamping function to prevent the second transistor Q2 (neutral wire switching unit 1141) from being damaged by overvoltage.

[0075] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or alterations made to the compatible lighting device according to this embodiment should still be included within the patent scope of the invention.

[0076] Although the steps of the methods described in this invention are shown and described in a specific order, the order of operation of each method may be changed, some steps may be performed in reverse order, or some steps may be performed simultaneously with other steps. In another embodiment, different steps may be implemented intermittently and / or alternately.

[0077] In summary, according to embodiments of the present invention, the lighting device includes a Class A driving circuit, a live wire input terminal, a Class B driving circuit, a neutral wire input terminal, and a light source. The Class A driving circuit includes a first rectifier module, a live wire switch module, a neutral wire switch module, a first surge protection module, and a filter module. The first rectifier module is connected to the live wire switch module and the first surge protection module. The live wire switch module is connected to the filter module, and the neutral wire switch module is connected to the filter module. The live wire input terminal is connected to the first rectifier module. The Class B driving circuit includes a second rectifier module, a leakage current detection module, a second surge protection module, and a constant current driving module. The second rectifier module is connected to the first surge protection module. The leakage current detection module is connected to the second surge protection module. The second surge protection module is connected to the constant current driving module. The neutral wire input terminal is connected to the second rectifier module. The light source is connected to the first surge protection module, the filter module, the neutral wire switch module, the second rectifier module, the leakage current detection module, and the constant current driving module. The live wire switch module includes a live wire capacitor voltage divider unit and a live wire switch unit. The live wire switching unit receives the voltage output from the first output terminal of the electronic ballast through the live wire capacitor voltage divider unit to enter the conduction state. The neutral wire switching module has a neutral wire capacitor voltage divider unit and a neutral wire switching unit. The neutral wire switching unit receives the voltage output from the second output terminal of the electronic ballast through the neutral wire capacitor voltage divider unit to enter the conduction state. Therefore, when the lighting device enters the ballast mode based on high-frequency signals, the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit in the Class A drive circuit are in a low-impedance state, which can achieve the voltage division function to generate voltage and respectively turn on the live wire switching unit and the neutral wire switching unit, thereby driving the light source. The leakage current detection module of the Class B drive circuit cannot recognize high-frequency signals, so it is in a stopped state. When the lighting device enters the mains power mode based on low-frequency signals, the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit in the Class A drive circuit are in a high-impedance state, which can isolate low-frequency signals and keep the Class A drive circuit in a stopped state. The leakage detection module of the Class B drive circuit can identify low-frequency signals, thus entering operation to perform leakage detection; the second surge protection module and the constant current drive module also enter operation to drive the light source. Through the above circuit design and operation mechanism, the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit can achieve high-frequency signal voltage division and low-frequency signal isolation functions. Therefore, the lighting device is compatible with both electronic ballasts and mains power, thus meeting the requirements of wide voltage applications (120~347V), allowing the lighting device to operate normally under different voltage environments.

[0078] Furthermore, according to embodiments of the present invention, the lighting device has a special circuit design and operating mechanism that enables the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit to achieve low-frequency signal isolation. Thus, when the lighting device enters a low-frequency signal-based mains power mode, the leakage detection module of the Class B drive circuit will not be affected by leakage interference from the Class A drive circuit, preventing malfunction or false alarms, while the constant current drive module can still operate normally to drive the light source. Therefore, the leakage detection module can effectively perform leakage detection to achieve leakage protection, enabling the lighting device to operate stably in mains power mode.

[0079] Furthermore, according to embodiments of the present invention, the lighting device has a special circuit design and operating mechanism that enables the live wire capacitor voltage divider unit and the neutral wire capacitor voltage divider unit to achieve high-frequency signal voltage division. Thus, when the lighting device enters the ballast mode based on high-frequency signals, the voltage applied to the live wire switching unit and the neutral wire switching unit can be reduced. This mechanism can prevent abnormal states of the live wire switching unit and the neutral wire switching unit, and can prevent high-voltage interference with the constant current drive module. Therefore, the lighting device can also operate stably in ballast mode.

[0080] Furthermore, according to embodiments of the present invention, the lighting device can not only be used as Type A+Type B lamps, but also as lamps of various sizes, such as T8, T9, T10, and T12, to meet the needs of different applications. Therefore, the lighting device has a wider range of applications and is more flexible in use.

[0081] Furthermore, according to embodiments of the present invention, the lighting device is simple in design, thus achieving the desired effect without significantly increasing costs. In addition, the efficiency and operational stability of the lighting device are effectively improved. Therefore, the practicality of the lighting device can be greatly enhanced, enabling it to meet market demands.

[0082] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this invention, or equivalent structural or procedural transformations made using the description and drawings of this invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this invention.

Claims

1. A compatible lighting device, characterized by, The application relates to a driving circuit for an electronic ballast, which comprises: a class A driving circuit, which comprises a first rectifying module, a live wire switching module, a zero wire switching module, a first surge protection module and a filter module, the first rectifying module being connected with the live wire switching module and the first surge protection module, the live wire switching module being connected with the filter module, the zero wire switching module being connected with the filter module, the live wire switching module comprising a live wire end capacitor voltage dividing unit, a live wire end switching unit, a live wire end voltage reducing rectifying unit and a live wire end commutating unit, the live wire end switching unit being connected with the filter module and the live wire end capacitor voltage dividing unit through the live wire end commutating unit and being connected with the live wire end capacitor voltage dividing unit through the live wire end voltage reducing rectifying unit, the live wire end capacitor voltage dividing unit comprising a first voltage dividing capacitor and a second voltage dividing capacitor connected in series, the live wire end switching unit being used for receiving the voltage outputted by a first output end of the electronic ballast through the live wire end capacitor voltage dividing unit to enter the conducting state, the zero wire switching module having a zero wire end capacitor voltage dividing unit, a zero wire end switching unit, a zero wire end voltage reducing rectifying unit and a zero wire end commutating unit, the zero wire end switching unit being connected with the filter module and the zero wire end capacitor voltage dividing unit through the zero wire end commutating unit and being connected with the zero wire end capacitor voltage dividing unit through the zero wire end voltage reducing rectifying unit, the zero wire end capacitor voltage dividing unit comprising a third voltage dividing capacitor and a fourth voltage dividing capacitor connected in series, the zero wire end switching unit being used for receiving the voltage outputted by a second output end of the electronic ballast through the zero wire end capacitor voltage dividing unit to enter the conducting state; a live wire input end connected with the first rectifying module; a class B driving circuit, which comprises a second rectifying module, a leakage detection module, a second surge protection module and a constant current driving module, the second rectifying module being connected with the first surge protection module, the leakage detection module being connected with the second surge protection module, and the second surge protection module being connected with the constant current driving module; a zero wire input end connected with the second rectifying module; and a light source connected with the first surge protection module, the filter module, the zero wire switching module, the second rectifying module, the leakage detection module and the constant current driving module.

2. The compatible illumination device of claim 1, wherein, The live wire switching module further comprises a live wire end protection unit, which is connected in parallel with the live wire end switching unit.

3. The compatible illumination device of claim 1, wherein, The zero wire switching module further comprises a zero wire end protection unit, which is connected in parallel with the zero wire end switching unit.

4. The compatible illumination device of claim 1, wherein, The light source comprises one or more light emitting diodes.

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