Compatible lighting device

Abstract

The compatible lighting device comprises an A-type driving circuit (comprising a first rectifier module, a live wire switch module, a null line switch module, a first surge protection module and a filter module), a live wire input end, a B-type driving circuit (comprising a second rectifier module, an electric leakage detection module, a second surge protection module and a constant current driving module), a null line input end and a light source. The first rectification module is connected with the live wire switch module and the first surge protection module. The live wire switch module is connected with the filtering module, and the zero line switch module is connected with the filtering module. The live wire input end is connected with the first rectifier module. The second rectification module is connected with the first surge protection module. The electric leakage detection module is connected with the second surge protection module. And the second surge protection module is connected with the constant current driving module. The zero line input end is connected with the second rectification module. The light source is connected with the first surge protection module, the filtering module, the zero line switch module, the second rectification module, the electric leakage detection module and the constant current driving module.

Description

Technical Field

[0001] The present invention relates to a lighting device, in particular to a compatible lighting device. Background Art

[0002] To meet market demand for compatibility with both electronic ballasts and AC power, Type A+B lamps have been developed. These lamps have a built-in driver. This driver is compatible with both electronic ballasts and can be driven directly by AC power. This makes Type A+B lamps compatible with both electronic ballasts and AC power.

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

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

[0005] In one embodiment, the live terminal 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 end voltage step-down rectifier unit and a live wire end switching unit. The live wire end switch unit is connected to the filter module and the live wire end capacitor voltage divider unit via the live wire end switching unit, and is connected to the live wire end capacitor voltage divider unit via the live wire end voltage step-down rectifier unit.

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

[0008] In one embodiment, the neutral line switch module comprises a neutral line capacitor voltage divider unit and a neutral line switch unit. The neutral line switch unit receives the voltage outputted by the second output terminal of the electronic ballast via the neutral line capacitor voltage divider unit to enter a conducting state.

[0009] In one embodiment, the neutral-line capacitor voltage-dividing unit includes a third voltage-dividing capacitor and a fourth voltage-dividing 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 switching unit. The neutral line switch unit is connected to the filter module and the neutral line capacitor voltage divider unit via the neutral line switching unit, and is connected to the neutral line capacitor voltage divider unit via the neutral line step-down rectifier unit.

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

[0012] In one embodiment, the light source comprises 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: (1) In one embodiment of the present invention, a 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 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 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 detection module, and the constant current driving module. The live wire switch module includes a live wire end capacitor voltage divider unit and a live wire end switch unit. The live-terminal switch unit receives the voltage output from the first output terminal of the electronic ballast via the live-terminal capacitor divider unit to enter the on state. The neutral-terminal switch module includes a neutral-terminal capacitor divider unit and a neutral-terminal switch unit. The neutral-terminal switch unit receives the voltage output from the second output terminal of the electronic ballast via the neutral-terminal capacitor divider unit to enter the on state. Therefore, when the lighting device enters the ballast mode based on a high-frequency signal, the live-terminal capacitor divider unit and the neutral-terminal capacitor divider unit in the Class A driver circuit are in a low-impedance state, which can achieve the voltage division function to generate voltage and turn on the live-terminal switch unit and the neutral-terminal switch unit, respectively, thereby driving the light source. The leakage detection module of the Class B driver circuit cannot recognize the high-frequency signal and therefore enters the off state. When the lighting device enters the mains power mode based on a low-frequency signal, the live-terminal capacitor divider unit and the neutral-terminal capacitor divider unit in the Class A driver circuit are in a high-impedance state, which can isolate the low-frequency signal and put the Class A driver circuit into the off state. The Class B driver circuit's leakage detection module recognizes low-frequency signals and enters operation to perform leakage detection. The second surge protection module and constant current driver module also enter operation to drive the light source. Through the aforementioned circuit design and operating mechanism, the live and neutral capacitor voltage dividers achieve high-frequency signal voltage division and low-frequency signal isolation. This makes the lighting device compatible with both electronic ballasts and mains power, meeting wide-voltage application requirements (120-347V), enabling normal operation in diverse voltage environments.

[0014] (2) In one embodiment of the present invention, the lighting device has a special circuit design and operating mechanism, so that the live-line capacitor voltage divider unit and the neutral-line capacitor voltage divider unit can achieve the low-frequency signal isolation function. In this way, when the lighting device enters the mains mode based on the low-frequency signal, the leakage detection module of the Class B driving circuit will not be interfered with by the leakage from the Class A driving circuit, resulting in failure or false alarm, and the constant current driving module can also operate normally to drive the light source. Therefore, the leakage detection module can effectively perform the leakage detection function to achieve leakage protection, so that the lighting device can operate stably in the mains mode.

[0015] (3) In one embodiment of the present invention, the lighting device has a special circuit design and operating mechanism, which enables the live-line capacitor voltage divider unit and the neutral-line capacitor voltage divider unit to achieve a high-frequency signal voltage divider function. In this way, when the lighting device enters the ballast mode based on the high-frequency signal, the voltage applied to the live-line switch unit and the neutral-line switch unit can be reduced. The above mechanism can prevent the live-line switch unit and the neutral-line switch unit from generating abnormal states and can prevent high voltage from interfering with the constant current drive module. Therefore, the lighting device can also operate stably in the ballast mode.

[0016] (4) In one embodiment of the present invention, the lighting device can be used not only as a Type A+Type B lamp, but also as a lamp 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 greater flexibility in use.

[0017] (5) In one embodiment of the present invention, the lighting device has a simple design, thereby achieving the desired effect without significantly increasing the cost. In addition, the efficiency and operational stability of the lighting device are also effectively improved. In this way, the practicality of the lighting device can be greatly improved, allowing the lighting device to meet market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a block diagram of a circuit structure of a compatible lighting device according to an embodiment of the present invention.

[0019] Figure 2 FIG. 4 is a perspective view of a compatible lighting device according to an embodiment of the present invention.

[0020] Figure 3 FIG. 1 is a first schematic diagram of a ballast mode of a compatible lighting device according to an embodiment of the present invention.

[0021] Figure 4 FIG. 2 is a second schematic diagram of a ballast mode of a compatible lighting device according to an embodiment of the present invention.

[0022] Figure 5 This is a first schematic diagram of a compatible lighting device in mains power mode according to an embodiment of the present invention.

[0023] Figure 6 This is a second schematic diagram of the AC power mode of the compatible lighting device according to an embodiment of the present invention.

[0024] Figure 7 FIG. 4 is a circuit diagram of a compatible lighting device according to another embodiment of the present invention.

[0025] Description of reference numerals: 1: Lighting device: 11-Class A drive circuit; 111-First rectifier module; 112-Hot line switch module; 1121-Hot line terminal switch unit; 1122-Hot line terminal capacitor voltage divider unit; 1123-Hot line terminal step-down rectifier unit; 1124-Hot line terminal reversing unit; 1125-Hot line terminal protection unit; 1126-Hot line terminal adjustment unit; 113-First surge protection module; 114-Neutral line switch module; 1141-Neutral line terminal switch unit 1142 - Neutral capacitor voltage divider unit; 1143 - Neutral step-down rectifier unit; 1144 - Neutral reversing unit; 1145 - Neutral protection unit; 1146 - Neutral adjustment unit; 115 - Filter module; 116 - Connection 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 terminal; 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 - tube body; CP1, CP2 - end caps; Q1 - first transistor; Q2 - second transistor; D1-D19 - first diode to nineteenth diode; R1-R10 - first resistor to tenth resistor; P1-P4 - first adjustment resistor to fourth adjustment resistor; C1-C4 - first capacitor to fourth capacitor; K1-K4 - first voltage divider capacitor to 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 to sixteenth node; GD - grounding point; A1, A2, A3, A4 - arrows.

[0026] The detailed features and advantages of the present invention are described in detail in the following embodiments, and the content is sufficient to enable anyone skilled in the relevant art to understand the technical content of the present invention and implement it accordingly. Moreover, based on the content, claims and drawings disclosed in this specification, anyone skilled in the relevant art can easily understand the purposes and advantages of this creation. DETAILED DESCRIPTION

[0027] The following describes embodiments of compatible lighting devices according to the present invention with reference to the relevant drawings. 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 being "connected" or "coupled" to another component, it may be directly connected or coupled to the other component or with intervening components. When a component is referred to as being "directly connected" or "directly coupled" to another component, no intervening components are present. Other terms used to describe relationships between components or layers should be interpreted similarly. For ease of understanding, identical components in the following embodiments are labeled with the same symbols.

[0028] See also Figure 1 , which is a schematic block diagram of the circuit structure of a compatible lighting device according to an embodiment of the present invention. As shown in the figure, the lighting device 1 includes a Class A driver circuit 11, a live input terminal Lin, a Class B driver circuit 12, a neutral input terminal Nin, and a light source 13.

[0029] The Class A driver circuit 11 includes a first rectifier module 111, a live switch module 112, a first surge protection module 113, a neutral switch module 114, and a filter module 115. The first rectifier module 111 is connected to the live switch module 112 and the first surge protection module 113. The live switch module 112 is connected to the filter module 115. The neutral switch module 114 is connected to the filter module 115. The live switch module 112 includes a live capacitor voltage divider unit and a live switch unit. The live capacitor voltage divider unit includes multiple capacitors connected in series.

[0030] The live wire input terminal Lin is connected to the first rectifier module 111. The live wire input terminal Lin is connected to the first output terminal of the mains and the first output terminal of the electronic ballast.

[0031] The Class B driving circuit 12 includes a second rectifier module 121, a leakage detection module 122, a second surge protection module 123 and a constant current driving module 124. The second rectifier module 121 is connected to the first surge protection module 113. The leakage detection module 122 is connected to the second surge protection module 123. The second surge protection module 123 is connected to the constant current driving module 124. The neutral line switch module 114 has a neutral line end capacitor voltage divider unit and a neutral line end switch unit. The neutral line end capacitor voltage divider unit includes a plurality of capacitors connected in series with each other. In one embodiment, the constant current driving module 124 can be various existing constant current light emitting diode drivers, which should be well known to those skilled in the art, so they will not be described in detail here. In one embodiment, the second surge protection module 123 can be various existing filter circuits that comply with FCC safety regulations and integrate surge protection, which should be well known to those skilled in the art, so they will not be described in detail here. In one embodiment, the leakage detection module 122 may be a JW1818 leakage protection controller manufactured by JOULWATT, other existing leakage protection controllers, or circuits with similar functions, which are well known to those skilled in the art and will not be described in detail herein.

[0032] The neutral line input terminal Nin is connected to the second rectifier module 121. The neutral line input terminal Nin is connected to the second output terminal of the mains and the second output terminal of the electronic ballast.

[0033] The light source 13 is connected to the first surge protection module 113, the filter module 115, the neutral line switch module 114, the second rectifier module 121, the leakage detection module 122 and the constant current drive module 124. The light source 13 includes one or more light emitting diodes (LEDs).

[0034] Of course, this embodiment is only used for illustration and does not limit the scope of the present invention. Equivalent modifications or changes made to the compatible lighting device according to this embodiment should still be included in the patent scope of the present invention.

[0035] See also Figure 2 , which is a three-dimensional diagram of a compatible lighting device according to one embodiment of the present invention. As shown, lighting device 1 may be a lamp tube, comprising a tube body TB, end caps CP1, and end caps CP2. End caps CP1 and CP2 are respectively disposed at opposite ends of tube body TB. The neutral input terminal Nin is disposed on end cap CP2, while the live input terminal Lin is disposed on end cap CP1. (The live input terminal Lin and the neutral input terminal Nin are pins of the lamp tube, which are connected to the two output terminals of the mains and the two output terminals of the electronic ballast.)

[0036] The type A driving circuit 11 may be disposed in the end cover CP1 , so that the live wire input terminal Lin may be connected to the first rectifier module 111 of the type A driving circuit 11 .

[0037] The class B driving circuit 12 may be disposed in the end cover CP2 , so that the neutral line input terminal Nin may be connected to the second rectifier module 121 of the class B driving circuit 12 .

[0038] In another embodiment, the lighting device 1 may also be other existing lighting devices, not limited to a lamp tube.

[0039] Of course, this embodiment is only used for illustration and does not limit the scope of the present invention. Equivalent modifications or changes made to the compatible lighting device according to this embodiment should still be included in the patent scope of the present invention.

[0040] See also Figure 3 and Figure 4 , which are the first and second schematic diagrams of the ballast mode of the compatible lighting device according to an embodiment of the present invention. Figure 3 As shown in the figure, when the lighting device 1 enters the ballast mode based on the high-frequency signal, the electric energy outputted by the first output terminal of the electronic ballast is inputted into the live wire input terminal Lin, passes through the first rectifier module 111, the live wire switch module 112, the filter module 115, and then reaches the light source 13, as shown by the arrow A1 in the figure (the electric energy outputted by 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 in the first rectifier module 111). Figure 4 As shown, the electric energy outputted from the second output terminal of the electronic ballast is inputted into the neutral line input terminal Nin, passes through the second rectifier module 121, the neutral line switch module 114, and the filter module 115, and then reaches the light source 13, as indicated by arrow A2 in the figure (the electric energy outputted from the second output terminal of the electronic ballast only passes through the second rectifier module 121 and does not pass through the rectifier circuit within the second rectifier module 121). In this way, the light source 13 can be driven in the ballast mode.

[0041] As mentioned above, the live wire switch module 112 includes a live wire end capacitor voltage divider unit and a live wire end switch unit. The live wire end capacitor voltage divider unit includes a plurality of capacitors connected in series. The neutral wire switch module 114 has a neutral wire end capacitor voltage divider unit and a neutral wire end switch unit. The neutral wire end capacitor voltage divider unit includes a plurality of capacitors connected in series. In this way, when the lighting device 1 enters the ballast mode based on the high-frequency signal, the live wire end switch unit receives the voltage output from the first output end of the electronic ballast through the live wire end capacitor voltage divider unit to enter the on state (the live wire end capacitor voltage divider unit performs the voltage divider function). The neutral wire end switch unit receives the voltage output from the second output end of the electronic ballast through the neutral wire end capacitor voltage divider unit to enter the on state (the neutral wire end capacitor voltage divider unit performs the voltage divider function). In this way, the light source 13 can be driven in the ballast mode.

[0042] When lighting device 1 enters ballast mode based on a high-frequency signal, the voltage applied to the hot and neutral switching units is reduced. This mechanism prevents abnormal operation of the hot and neutral switching units and prevents high voltage interference with the constant current driver module 124. Furthermore, since leakage detection module 122 cannot recognize high-frequency signals, it prevents erroneous activation of the constant current driver module 124. Therefore, lighting device 1 can operate stably in ballast mode.

[0043] See also Figure 5 and Figure 6 , which are the first and second schematic diagrams of the AC power mode of a compatible lighting device according to an embodiment of the present invention. Figure 5 As shown in the figure, when the lighting device 1 enters the mains power mode based on the low-frequency signal, the electric energy output by the first output terminal of the mains will be input to the live wire input terminal Lin, and pass through the first rectifier module 111, the first surge protection module 113, the leakage detection module 122, the second surge protection module 123 and the constant current drive module 124, and then reach the light source 13, as shown by the arrow A3 in the figure (the electric energy output by the first output terminal of the mains will pass through the rectifier circuit in the first rectifier module 111). Figure 6 As shown, the electric energy outputted from the second output terminal of the mains is inputted into the neutral line input terminal Nin, passes through the second rectifier module 121, the first surge protection module 113, the leakage detection module 122, the second surge protection module 123, and the constant current driver module 124, and then reaches the light source 13, as indicated by arrow A4 in the figure (the electric energy outputted from the second output terminal of the mains passes through the rectifier circuit in the second rectifier module 121). In this way, the light source 13 can be driven in the mains mode.

[0044] Because the live and neutral capacitor voltage dividers are formed by series capacitors, they effectively isolate low-frequency signals. Thus, when the lighting device 1 enters the low-frequency signal-based AC power mode, the leakage detection module 122 of the Class B driver circuit 12 is not interfered with by leakage from the Class A driver circuit 11, which could cause failure or false alarms. Furthermore, the constant current driver module 124 can function normally to drive the light source 13. Therefore, the leakage detection module 122 can effectively perform leakage detection and provide leakage protection, allowing the lighting device 1 to operate stably in the AC power mode.

[0045] Through the aforementioned circuit design and operating mechanism, the live and neutral capacitor voltage dividers achieve high-frequency signal voltage division and low-frequency signal isolation. This makes the lighting device compatible with both electronic ballasts and mains power, meeting wide-voltage application requirements (120-347V), enabling normal operation in diverse voltage environments.

[0046] Of course, this embodiment is only used for illustration and does not limit the scope of the present invention. Equivalent modifications or changes made to the compatible lighting device according to this embodiment should still be included in the patent scope of the present invention.

[0047] It's worth noting that the input voltage range of existing Class A+B lamps is typically between 120V and 277V. Some existing Class A+B lamps can support an input voltage of 347V; however, to ensure leakage protection, these lamps are incompatible with both 120V and 277V input voltages. In contrast, according to an embodiment of the present invention, a lighting device includes a Class A driver circuit, a live input terminal, a Class B driver circuit, a neutral input terminal, and a light source. The Class A driver circuit includes a first rectifier module, a live switch module, a neutral switch module, a first surge protection module, and a filter module. The first rectifier module is connected to the live switch module and the first surge protection module. The live switch module is connected to the filter module, and the neutral switch module is connected to the filter module. The live input terminal is connected to the first rectifier module. The Class B driver circuit includes a second rectifier module, a leakage detection module, a second surge protection module, and a constant current driver 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 driver module. The neutral 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 switch module, the second rectifier module, the leakage detection module, and the constant current drive module. The live switch module includes a live capacitor voltage divider unit and a live switch unit. The live switch unit receives the voltage output from the first output terminal of the electronic ballast via the live capacitor voltage divider unit to enter the on state. The neutral switch module includes a neutral capacitor voltage divider unit and a neutral switch unit. The neutral switch unit receives the voltage output from the second output terminal of the electronic ballast via the neutral capacitor voltage divider unit to enter the on state. Therefore, when the lighting device enters the ballast mode based on the high-frequency signal, the live capacitor voltage divider unit and the neutral capacitor voltage divider unit in the Class A drive circuit are in a low-impedance state, which can achieve the voltage divider function to generate voltage and turn on the live switch unit and the neutral switch unit respectively, thereby driving the light source. The leakage detection module of the Class B drive circuit cannot recognize the high-frequency signal and is therefore in a stopped state. When the lighting device enters the AC power mode based on a low-frequency signal, the live-line capacitor voltage divider unit and the neutral-line capacitor voltage divider unit in the Class A driver circuit are in a high-impedance state, which can isolate the low-frequency signal and put the Class A driver circuit into a stopped state. The leakage detection module of the Class B driver circuit can identify the low-frequency signal, so it enters the operating state to perform the leakage detection function; the second surge protection module and the constant current driver module also enter the operating state to drive the light source. Through the above-mentioned circuit design and operating mechanism, the live-line capacitor voltage divider unit and the neutral-line capacitor voltage divider unit can achieve the high-frequency signal voltage divider function and the low-frequency signal isolation function. In this way, the lighting device is not only compatible with electronic ballasts and AC power, but also can meet the requirements of wide voltage applications (120~347V), so that the lighting device can operate normally in different voltage environments.

[0048] Furthermore, according to embodiments of the present invention, the lighting device features a unique circuit design and operating mechanism, enabling the live and neutral capacitor divider units to achieve low-frequency signal isolation. Consequently, when the lighting device enters the mains power mode, which relies on low-frequency signals, the leakage detection module of the Class B driver circuit is not interfered with by leakage from the Class A driver circuit, which could cause failure or false alarms. The constant current driver module can then operate normally to drive the light source. Consequently, the leakage detection module can effectively perform leakage detection and provide leakage protection, enabling the lighting device to operate stably in mains power mode.

[0049] Furthermore, according to an embodiment of the present invention, the lighting device features a unique circuit design and operating mechanism, enabling the live and neutral capacitor voltage dividers to achieve high-frequency signal voltage division. Consequently, when the lighting device enters ballast mode, which relies on high-frequency signals, the voltages applied to the live and neutral switch units are reduced. This mechanism prevents abnormal operation of the live and neutral switch units and prevents high voltage interference with the constant current driver module. Consequently, the lighting device can operate stably in ballast mode.

[0050] Furthermore, according to embodiments of the present invention, the lighting device can be used not only as a Type A+Type B lamp, but also as a lamp 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 greater flexibility in use.

[0051] Furthermore, according to the embodiments of the present invention, the lighting device has a simple design, thus achieving the desired effect without significantly increasing costs. Furthermore, the efficiency and operational stability of the lighting device are effectively improved. This significantly enhances the practicality of the lighting device, allowing it to meet market demands. As can be seen from the foregoing, the compatible lighting device according to the embodiments of the present invention can indeed achieve excellent technical results.

[0052] See also Figure 7 , which is a circuit diagram of a compatible lighting device according to another embodiment of the present invention. Figure 7The following example illustrates one circuit design of the Class A driver circuit 11 of the lighting device 1. However, this embodiment is merely an example and not a limitation. The Class A driver 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 driver circuit 11 includes a first rectifier module 111, a live switch module 112, a first surge protection module 113, a neutral switch module 114, and a filter module 115. The Class A driver circuit 11 also includes a connecting board 116, which is connected to the light source 13 via the connecting board 116. The connecting board 116 includes a DC positive electrode D+, a DC negative electrode D-, a light source positive electrode L+, a light source negative electrode L-, and a neutral terminal Nin' (the neutral terminal Nin' can be connected to the neutral input terminal Nin via 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 not have a fuse). The DC positive electrode D+ and the DC negative electrode D- are connected to the first surge protection module 113. The positive electrode L+ and the negative electrode L- of the light source are connected to the filter module 115. The structure of the connecting plate 116 is a part of a conventional light source board and should be well known to those skilled in the art, so it will not be described in detail here.

[0053] The hot wire switch module 112 includes a hot wire end switch unit 1121, a hot wire end capacitor voltage divider unit 1122, a hot wire end voltage reduction and rectification unit 1123, a hot wire end switching unit 1124, a hot wire end protection unit 1125, and a hot wire end adjustment unit 1126. The hot wire end switch unit 1121 is connected to the filter module 115 and the hot wire end capacitor voltage divider unit 1122 via the hot wire end switching unit 1124, and is connected to the hot wire end capacitor voltage divider unit 1122 via the hot wire end voltage reduction and rectification unit 1123.

[0054] The hot terminal switch 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 can be a gold oxide field-effect transistor (MOSFET). In another embodiment, the first transistor Q1 can also be a bipolar junction transistor (BJT) or other similar device.

[0055] The hot-line terminal reversing 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 a 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 a 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.

[0056] The hot-line 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 first resistor R1 has two terminals connected to a first node N1 and a third node N3, respectively. The first capacitor C1 has two terminals connected to a first node N1 and a third node N3, respectively. The first Zener diode Z1 has two terminals connected to a first node N1 and a third node N3, respectively. The fifth diode D5 has two terminals connected to a first node N1 and a sixth node N6, respectively. The sixth diode D6 has two terminals connected to a third node N3 and a sixth node N6, respectively. The second capacitor C2 has two terminals connected to a sixth node N6 and one end of the second resistor R2, respectively. The other end of the second resistor R2 is connected to a seventh node N7.

[0057] The live-terminal capacitor divider unit 1122 includes a first divider capacitor K1 and a second divider capacitor K2 connected in series. The first divider capacitor K1 has its terminals connected to a fifth node N5 and a seventh node N7, respectively. The second divider capacitor K2 has its terminals connected to a seventh node N7 and an eighth node N8, respectively. The eighth node N8 is connected to the first rectifier module 111.

[0058] The hot terminal protection unit 1125 includes a first transient voltage suppression (TVS) diode S1 . 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 as to be connected in parallel with the hot terminal switch unit 1121 .

[0059] The hot-terminal adjustment unit 1126 includes a first adjustment resistor P1 and a second adjustment resistor P2 connected in series. The hot-terminal adjustment unit 1126 is connected in parallel with the hot-terminal capacitor voltage divider unit 1122. The current generated by the discharge of the hot-terminal capacitor voltage divider unit 1122 passes through the hot-terminal adjustment unit 1126 to prevent electric shock.

[0060] The neutral switch module 114 includes a neutral switch unit 1141, a neutral capacitor voltage divider unit 1142, a neutral step-down rectifier unit 1143, a neutral reversing unit 1144, a neutral protection unit 1145, and a neutral adjustment unit 1146. The neutral switch unit 1141 is connected to the filter module 115 and the neutral capacitor voltage divider unit 1142 via the neutral reversing unit 1144, and is connected to the neutral capacitor voltage divider unit 1142 via the neutral step-down rectifier unit 1143.

[0061] The neutral-side switch unit 1141 includes a second transistor Q2. The source of the second transistor Q2 is connected to a ninth node N9; the drain of the second transistor Q2 is connected to a tenth node N10; the gate of the second transistor Q2 is connected to an 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 be a bipolar junction transistor or other similar device.

[0062] The neutral-line switching 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 a twelfth node N12, which is connected to the other output end of the filter module 115. The other end of the seventh diode D7 is connected to a 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 a tenth node N10. One end of the ninth diode D9 is connected to a 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.

[0063] The neutral-side 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 third resistor R3 has two terminals connected to a ninth node N9 and an eleventh node N11, respectively. The third capacitor C3 has two terminals connected to a ninth node N9 and an eleventh node N11, respectively. The second Zener diode Z2 has two terminals connected to a ninth node N9 and an eleventh node N11, respectively. The eleventh diode D11 has two terminals connected to a ninth node N9 and a fourteenth node N14, respectively. The twelfth diode D12 has two terminals connected to a eleventh node N11 and a fourteenth node N14, respectively. The fourth capacitor C4 has two terminals connected to a fourteenth node N14 and one end of the fourth resistor R4, respectively. The other end of the fourth resistor R4 is connected to a fifteenth node N15.

[0064] The neutral-line capacitor voltage divider unit 1142 includes a third voltage divider capacitor K3 and a fourth voltage divider capacitor K4 connected in series. The terminals of the third voltage divider capacitor K3 are connected to a thirteenth node N13 and a fifteenth node N15, respectively. The terminals of the fourth voltage divider capacitor K4 are connected to a fifteenth node N15 and a sixteenth node N16, respectively. The sixteenth node N16 is connected to the neutral-line adjustment unit 1146.

[0065] The neutral terminal protection unit 1145 includes a second transient voltage suppressor diode S2 . Two ends of the second transient voltage suppressor diode S2 are respectively connected to the tenth node N10 and the ninth node N9 , so as to be connected in parallel with the neutral terminal switch unit 1141 .

[0066] 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 1142. The current generated by the discharge of the neutral-line capacitor voltage divider 1142 passes through the neutral-line adjustment unit 1146 to prevent electric shock.

[0067] The first rectifier module 111 may be a half-bridge rectifier including 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 will not be described in detail herein.

[0068] The first surge protection module 113 may be an RDC surge protection circuit including 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 may also be a surge protection device (SPD) or other similar circuits, which are well known to those skilled in the art and are not described in detail here.

[0069] The filter module 115 can be a high-frequency rectifier / filter module, comprising 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 another circuit having similar functions, which are well known to those skilled in the art and are not described in detail here.

[0070] As previously mentioned, the live-side capacitor divider unit 1122 includes a first divider capacitor K1 and a second divider capacitor K2 connected in series. For example, the capacitance of the second divider capacitor K2 is approximately half that of the first divider capacitor K1. The voltage output by the first output terminal of the electronic ballast is input to the live-side input terminal Lin, passes through the fuse Fs1 of the first rectifier module 111, and is then divided by the first divider capacitor K1 and the second divider capacitor K2. At this time, the voltage of the first divider capacitor K1 is approximately 1 / 2 of the voltage of the second divider capacitor K2 (or the voltage of the first divider capacitor K1 is less than 1 / 2 of the voltage of the second divider capacitor K2). The voltage of the first divider capacitor K1 is processed by the live-side step-down rectifier unit 1123 and provides a starting voltage to the first transistor Q1 (live-side switch unit 1121), turning on the first transistor Q1. Similarly, the neutral-side capacitor divider unit 1142 includes a third divider capacitor K3 and a fourth divider capacitor K4 connected in series. For example, the capacitance of the fourth voltage-dividing capacitor K4 is approximately half that of the third voltage-dividing capacitor K3. The voltage output from the second output terminal of the electronic ballast is input to the neutral line input terminal Nin, and after passing through the second rectifier module 121, it is input to the neutral line terminal Nin' (this voltage does not pass through the rectifier circuit of the second rectifier module 121). It is then divided by the third voltage-dividing capacitor K3 and the fourth voltage-dividing capacitor K4. At this time, the voltage of the third voltage-dividing capacitor K3 is approximately 1 / 2 of the voltage of the fourth voltage-dividing capacitor K4 (or the voltage of the third voltage-dividing capacitor K3 is less than 1 / 2 of the voltage of the fourth voltage-dividing capacitor K4). The voltage of the third voltage-dividing capacitor K3 is processed by the neutral line step-down rectifier unit 1143 and provides a starting voltage to the second transistor Q2 (neutral line switch unit 1141), turning on the second transistor Q2.

[0071] The neutral-line reversing unit 1144 forms a reversing switch, and the sinusoidal current is output to the eighteenth diode D18 and the nineteenth diode D19 through the seventh diode D7, the eighth diode D8, the ninth diode D9 and the tenth diode D10, forming a DC voltage to drive the light source 13 to emit light, thereby forming a complete circuit.

[0072] The hot line protection unit 1125 can provide a voltage clamping function to prevent the first transistor Q1 (hot line switch unit 1121) from being damaged by overvoltage. Similarly, the neutral line protection unit 1145 can provide a voltage clamping function to prevent the second transistor Q2 (neutral line switch unit 1141) from being damaged by overvoltage.

[0073] Of course, this embodiment is only used for illustration and does not limit the scope of the present invention. Equivalent modifications or changes made to the compatible lighting device according to this embodiment should still be included in the patent scope of the present invention.

[0074] Although the steps of the method described in the present invention are shown and described in a particular order, the order of operation of each method can be changed, and some steps can be performed in a reverse order, or some steps can be performed simultaneously with other steps. In another embodiment, different steps can be implemented in an intermittent and / or alternating manner.

[0075] In summary, according to an embodiment of the present invention, a lighting device includes a Class A driver circuit, a live wire input terminal, a Class B driver circuit, a neutral wire input terminal, and a light source. The Class A driver 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 driver circuit includes a second rectifier module, a leakage detection module, a second surge protection module, and a constant current driver 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 driver 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 detection module, and the constant current driver module. The live wire switch module includes a live wire end capacitor voltage divider unit and a live wire end switch unit. The live-terminal switch unit receives the voltage output from the first output terminal of the electronic ballast via the live-terminal capacitor divider unit to enter the on state. The neutral-terminal switch module includes a neutral-terminal capacitor divider unit and a neutral-terminal switch unit. The neutral-terminal switch unit receives the voltage output from the second output terminal of the electronic ballast via the neutral-terminal capacitor divider unit to enter the on state. Therefore, when the lighting device enters the ballast mode based on a high-frequency signal, the live-terminal capacitor divider unit and the neutral-terminal capacitor divider unit in the Class A driver circuit are in a low-impedance state, which can achieve the voltage division function to generate voltage and turn on the live-terminal switch unit and the neutral-terminal switch unit, respectively, thereby driving the light source. The leakage detection module of the Class B driver circuit cannot recognize the high-frequency signal and therefore enters the off state. When the lighting device enters the mains power mode based on a low-frequency signal, the live-terminal capacitor divider unit and the neutral-terminal capacitor divider unit in the Class A driver circuit are in a high-impedance state, which can isolate the low-frequency signal and put the Class A driver circuit into the off state. The Class B driver circuit's leakage detection module recognizes low-frequency signals and enters operation to perform leakage detection. The second surge protection module and constant current driver module also enter operation to drive the light source. Through the aforementioned circuit design and operating mechanism, the live and neutral capacitor voltage dividers achieve high-frequency signal voltage division and low-frequency signal isolation. This makes the lighting device compatible with both electronic ballasts and mains power, meeting wide-voltage application requirements (120-347V), enabling normal operation in diverse voltage environments.

[0076] Furthermore, according to embodiments of the present invention, the lighting device features a unique circuit design and operating mechanism, enabling the live and neutral capacitor divider units to achieve low-frequency signal isolation. Consequently, when the lighting device enters the mains power mode, which relies on low-frequency signals, the leakage detection module of the Class B driver circuit is not interfered with by leakage from the Class A driver circuit, which could cause failure or false alarms. The constant current driver module can then operate normally to drive the light source. Consequently, the leakage detection module can effectively perform leakage detection and provide leakage protection, enabling the lighting device to operate stably in mains power mode.

[0077] Furthermore, according to an embodiment of the present invention, the lighting device features a unique circuit design and operating mechanism, enabling the live and neutral capacitor voltage dividers to achieve high-frequency signal voltage division. Consequently, when the lighting device enters ballast mode, which relies on high-frequency signals, the voltages applied to the live and neutral switch units are reduced. This mechanism prevents abnormal operation of the live and neutral switch units and prevents high voltage interference with the constant current driver module. Consequently, the lighting device can operate stably in ballast mode.

[0078] Furthermore, according to embodiments of the present invention, the lighting device can be used not only as a Type A+Type B lamp, but also as a lamp 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 greater flexibility in use.

[0079] Furthermore, according to the embodiments of the present invention, the lighting device has a simple design, thus achieving the desired effect without significantly increasing costs. Furthermore, the efficiency and operational stability of the lighting device are effectively improved. This significantly enhances the practicality of the lighting device, allowing it to meet market demands.

[0080] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present invention. Therefore, based on the innovative concept of the present invention, changes and modifications to the embodiments described herein, or equivalent structural or equivalent process transformations made using the contents of the present invention's description and drawings, and direct or indirect application of the above technical solutions to other related technical fields are all included in the scope of protection of the present invention's patent.

Claims

1. A compatible lighting device, characterized in that: include: A Class A drive circuit includes a first rectifier module, a live switch module, a neutral switch module, a first surge protection module, and a filter module, wherein the first rectifier module is connected to the live switch module and the first surge protection module, the live switch module is connected to the filter module, and the neutral switch module is connected to the filter module; a live wire input terminal connected to the first rectifier module; A Class B drive circuit includes a second rectifier module, a leakage detection module, a second surge protection module, and a constant current drive module, wherein the second rectifier module is connected to the first surge protection module, the leakage detection module is connected to the second surge protection module, and the second surge protection module is connected to the constant current drive module; a neutral line input terminal connected to the second rectifier module; and A light source is connected to the first surge protection module, the filtering module, the neutral line switch module, the second rectifier module, the leakage detection module and the constant current driving module.

2. The compatible lighting device according to claim 1, wherein: The live wire switch module includes a live wire end capacitor voltage divider unit and a live wire end switch unit. The live wire end switch unit is used to receive the voltage output from the first output terminal of the electronic ballast through the live wire end capacitor voltage divider unit to enter a conducting state.

3. The compatible lighting device according to claim 2, wherein: The live wire end capacitor voltage divider unit includes a first voltage divider capacitor and a second voltage divider capacitor connected in series.

4. The compatible lighting device according to claim 2, wherein: The live wire switch module further includes a live wire end step-down rectifier unit and a live wire end reversing unit. The live wire end switch unit is connected to the filter module and the live wire end capacitor voltage divider unit through the live wire end reversing unit, and is connected to the live wire end capacitor voltage divider unit through the live wire end step-down rectifier unit.

5. The compatible lighting device according to claim 4, characterized in that: The live wire switch module further includes a live wire end protection unit, which is connected in parallel with the live wire end switch unit.

6. The compatible lighting device according to claim 1, wherein: The neutral line switch module comprises a neutral line capacitor voltage divider unit and a neutral line switch unit. The neutral line switch unit is used to receive the voltage outputted from the second output terminal of the electronic ballast through the neutral line capacitor voltage divider unit to enter a conducting state.

7. The compatible lighting device according to claim 6, wherein: The neutral line capacitor voltage dividing unit includes a third voltage dividing capacitor and a fourth voltage dividing capacitor connected in series.

8. The compatible lighting device according to claim 6, wherein: The neutral line switch module further includes a neutral line step-down rectifier unit and a neutral line reversing unit. The neutral line switch unit is connected to the filter module and the neutral line capacitor voltage divider unit through the neutral line reversing unit, and is connected to the neutral line capacitor voltage divider unit through the neutral line step-down rectifier unit.

9. The compatible lighting device according to claim 8, wherein: The neutral line switch module further includes a neutral line terminal protection unit, and the neutral line terminal protection unit is connected in parallel with the neutral line terminal switch unit.

10. The compatible lighting device according to claim 1, wherein: The light source includes one or more light emitting diodes.

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