High compatibility lighting device driver

Abstract

A high-compatibility lighting device driver comprises an input module, a rectification module, a driving control module and a power conversion module. The input module is coupled with an external input signal. The rectifier module is connected with the input module and rectifies an input signal to generate a rectified signal. The driving control module is connected with the rectification module and comprises a control unit and a signal identification unit which are connected with each other. A part of the input signal is coupled to the signal identification unit, so that the signal identification unit generates an identification signal. The power conversion module is connected with the driving control module, the control unit and the load. Wherein the rectification signal drives the load by driving the control module and the power conversion module, and the control unit controls the power conversion module to perform working mode conversion according to the frequency of the identification signal.

Description

Technical Field

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

[0002] Thanks to technological advancements, the functionality and efficiency of fluorescent tubes have been greatly improved. Multifunctional fluorescent tubes have been developed to be compatible with mains power and ballasts and are now widely used in the market.

[0003] While existing lamps compatible with mains power and ballasts are very convenient to use, their complex circuitry significantly increases costs. For the same reason, due to their complex circuitry, these lamps require additional circuit modules and more electronic components; therefore, they require a larger internal space, making it difficult to reduce their size. Summary of the Invention

[0004] According to one embodiment of the present invention, a highly compatible lighting device driver is provided, comprising an input module, a rectifier module, a drive control module, and a power conversion module. The input module couples to an external input signal. The rectifier module is connected to the input module and rectifies the input signal to generate a rectified signal. The drive control module is connected to the rectifier module and includes a control unit and a signal recognition unit interconnected. A portion of the input signal is coupled to the signal recognition unit, causing the signal recognition unit to generate an recognition signal. The power conversion module is connected to the drive control module, the control unit, and the load. The rectified signal drives the load through the drive control module and the power conversion module, and the control unit controls the power conversion module to switch operating modes according to the frequency of the recognition signal.

[0005] In one embodiment, the control unit enters ballast mode when the frequency of the identified signal is greater than or equal to a preset frequency threshold. In ballast mode, the control unit generates a DC signal to control the power conversion module switching transistor to shoot through.

[0006] In one embodiment, the power conversion module includes a switching unit, an output unit, and a sampling unit. The switching unit is connected to the output unit and the sampling unit. The sampling unit is connected to the control unit. The rectified signal is smoothed twice through the switching unit, the output unit, and the sampling unit before driving the load.

[0007] In one embodiment, the control unit enters mains power mode when the frequency of the identified signal is lower than a preset frequency threshold. In mains power mode, the control unit generates a pulse width modulation signal to control the power conversion module to perform power conversion.

[0008] In one embodiment, the power conversion module includes a switching unit, an output unit, and a sampling unit. The switching unit is connected to the output unit and the sampling unit. The sampling unit is connected to the control unit. The rectified signal drives the load through the switching unit, the output unit, and the sampling unit. The sampling unit generates a feedback signal based on the peak current when the switching unit is turned on, and the control unit adjusts the pulse width modulation signal based on the feedback signal.

[0009] In one embodiment, the drive control module further includes an impedance identification and detection unit. The impedance identification and detection unit is connected to the rectified signal output terminal of the rectifier module and the control unit. The impedance identification and detection unit detects the impedance of the rectified signal. The control unit enters a protection state when the impedance exceeds a preset impedance threshold.

[0010] In one embodiment, the impedance identification detection unit includes multiple resistors connected in series.

[0011] In one embodiment, the drive control module further includes a DC signal smoothing unit. The DC signal smoothing unit is connected to the rectified signal output terminal of the rectifier module and the control unit. The DC signal smoothing unit converts the rectified signal into a smoothed DC signal to power the drive control module.

[0012] In one embodiment, the signal recognition unit is a capacitor.

[0013] In one embodiment, the signal recognition unit is connected to the input module via another capacitor, so that a portion of the input signal is coupled to the signal recognition unit.

[0014] As described above, the highly compatible lighting device driver according to embodiments of the present invention may have one or more of the following advantages:

[0015] (1) In one embodiment of the present invention, the lighting device driver includes an input module, a rectifier module, a drive control module, and a power conversion module. The input module couples to an external input signal. The rectifier module is connected to the input module and rectifies the input signal to generate a rectified signal. The drive control module is connected to the rectifier module and includes a control unit and a signal recognition unit connected to each other. A portion of the input signal is coupled to the signal recognition unit, causing the signal recognition unit to generate an recognition signal. The power conversion module is connected to the drive control module, the control unit, and the load. The rectified signal drives the load through the drive control module and the power conversion module, and the control unit controls the power conversion module to switch operating modes according to the frequency of the recognition signal. The control unit enters ballast mode when the frequency of the recognition signal is greater than or equal to a preset frequency threshold. In ballast mode, the control unit generates a DC signal to control the power conversion module's switching transistor to shoot through. When the frequency of the recognition signal is lower than the preset frequency threshold, the control unit enters mains mode, and in mains mode, the control unit generates a pulse width modulation signal to control the power conversion module to perform power conversion. Through the aforementioned control mechanism based on input signal recognition, the lighting device driver can selectively output DC signals or pulse width modulation signals to switch between mains mode and ballast mode. Therefore, the lighting device driver achieves high compatibility, making its applications more widespread.

[0016] (2) In one embodiment of the present invention, the lighting device driver can achieve high compatibility through the above-described control mechanism based on input signal recognition, without requiring additional circuit modules. Furthermore, the circuit structure of the lighting device driver can simultaneously implement both mains power mode and ballast mode. This significantly simplifies the circuit structure of the lighting device driver, greatly reducing its cost. Therefore, the lighting device driver can meet the needs of practical applications.

[0017] (3) In one embodiment of the present invention, the lighting device driver can achieve high compatibility through the above-described control mechanism based on input signal recognition, without requiring additional circuit modules. This significantly simplifies the circuit structure of the lighting device driver and reduces the number of electronic components required. Consequently, the size of the lighting device driver can be reduced to achieve miniaturization, making it compatible with future development trends.

[0018] (4) In one embodiment of the present invention, the drive control module of the lighting device driver further includes an impedance identification and detection unit. The impedance identification and detection unit is connected to the rectified signal output terminal of the rectifier module and the control unit. The impedance identification and detection unit detects the impedance of the rectified signal. The control unit enters a protection state when the impedance is greater than a preset impedance threshold value. The above-described impedance detection mechanism can effectively detect whether there is human body resistance connected to the lighting device driver, so as to prevent electric shock. Therefore, the safety performance of the lighting device driver is greatly improved.

[0019] (5) In one embodiment of the present invention, the circuit design of the lighting device driver is simple, thus achieving the desired effect while reducing costs. Furthermore, the circuit design of the lighting device driver allows for a reduction in its size. Therefore, the lighting device driver achieves high practicality to meet the needs of various applications. Attached Figure Description

[0020] Figure 1 This is a block diagram of a highly compatible lighting device driver according to a first embodiment of the present invention.

[0021] Figure 2 This is a circuit diagram of a highly compatible lighting device driver according to a second embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the mains power mode of a highly compatible lighting device driver according to a second embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the pulse width modulation signal of a high-compatibility lighting device driver according to a second embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the ballast mode of a highly compatible lighting device driver according to a second embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the DC signal of a highly compatible lighting device driver according to a second embodiment of the present invention.

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

[0027] 1-Lighting device driver; 11-Input module; 12-Rectifier module; 13-Drive control module; 131-Control unit; 132-Signal recognition unit; 133-Impedance recognition and detection unit; 134-DC signal smoothing unit; 14-Power conversion module; 141-Switching unit; 142-Sampling unit; 143-Output unit; LD-Load; LS-Light source; P1-First input terminal; P2-Second input terminal; P3-Third input terminal; P4-Fourth input terminal; BD1-First commutator; BD2-Second commutator; F1-First fuse; F2-Second fuse; F3-Third fuse; Cp-Capacitor; D1-First diode; D2-Second diode; L1-Inductor; C1-First capacitor; C 2 - Second capacitor; C3 - Third capacitor; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; RS1 - First sampling resistor; RS2 - Second sampling resistor; Q1 - Switch; LE - Energy storage inductor; CE - Electrolytic capacitor; T1 - First output terminal; T2 - Second output terminal; U1 - Controller; VB+ - Rectified signal output terminal; N1 - First node; N2 - Second node; N3 - Third node; N4 - Fourth node; N5 - Fifth node; GND - Grounding point; Lt1, Nt1, Lt, Nt - Mains power output terminals; GH - Ballast; Is' - Part of the input signal; Ns - Identification signal; Rs - Rectified signal; Cs1 - DC signal; Cs2 - Pulse width modulation signal; Arrows A1 to A6.

[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 the highly compatible lighting device driver 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 1This is a block diagram of a highly compatible lighting device driver according to a first embodiment of the present invention. As shown in the figure, the lighting device driver 1 includes an input module 11, a rectification module 12, a drive control module 13, and a power conversion module 14.

[0031] Input module 11 can be connected to a power supply to couple an external input signal Is (output from this power supply). The power supply can be AC ​​power or a ballast GH.

[0032] The rectifier module 12 is connected to the input module 11 and rectifies the input signal Is to generate a rectified signal Rs.

[0033] The drive control module 13 is connected to the rectifier module 12. The drive control module 13 includes a control unit 131 and a signal recognition unit 132 connected to each other. The control unit 131 is connected to the rectifier module 12. The signal recognition unit 132 is connected to the rectifier module 12, allowing a portion of the input signal Is' to be coupled to the signal recognition unit 132. Thus, the signal recognition unit 132 can generate an identification signal Ns. In one embodiment, the control unit 131 may be a microcontroller (MCU). In another embodiment, the control unit 131 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other similar components. The signal recognition unit 132 may be a component with energy storage capabilities. In one embodiment, the signal recognition unit 132 is a capacitor Cp; the signal recognition unit 132 can be connected to the input module 11 via another capacitor Cp (which may be located within the rectifier module 12), allowing a portion of the input signal Is' to be coupled to the signal recognition unit 132; the signal recognition unit 132 may also be directly connected to the input module 11. In another embodiment, the signal recognition unit 132 may also be an inductor L1 or a circuit structure including multiple electronic components (capacitor Cp, inductor L1, resistor, etc.). Additionally, the drive control module 13 may also include an impedance recognition and detection unit 133. The impedance recognition and detection unit 133 is connected to the rectified signal output terminal VB+ of the rectifier module 12 and the control unit 131. The impedance recognition and detection unit 133 detects the impedance of the rectified signal Rs. The control unit 131 enters a protection state when the impedance exceeds a preset impedance threshold, thus implementing the impedance detection mechanism. The aforementioned impedance detection mechanism can effectively detect whether a human body resistor is connected to the lighting device driver 1, preventing electric shock. Therefore, the safety performance of the lighting device driver 1 is significantly improved.

[0034] The power conversion module 14 is connected to the drive control module 13, the control unit 131, and the load LD. In one embodiment, the load LD may include one or more light sources LS, which may be light-emitting diodes (LEDs). In another embodiment, the light source LS may also be a bulb, lamp, or other similar component. The rectified signal RS drives the load LD through the drive control module 13 and the power conversion module 14.

[0035] The control unit 131 controls the power conversion module 14 to switch operating modes based on the frequency of the identification signal Ns. When the frequency of the identification signal Ns is greater than or equal to a preset frequency threshold, the control unit 131 enters ballast mode. In ballast mode, the control unit 131 generates a DC signal Cs1 to control the power conversion module 14's switching transistor to turn on. Conversely, when the frequency of the identification signal Ns is lower than the preset frequency threshold, the control unit 131 enters AC power mode, generating a pulse width modulation (PWM) signal Cs2 to control the power conversion module 14 to perform power conversion.

[0036] The circuit structure described above enables a control mechanism based on input signal recognition. Through this mechanism, the lighting device driver 1 can selectively output a DC signal Cs1 or a pulse-width modulation signal Cs2 to switch between mains mode and ballast mode. Therefore, the lighting device driver 1 achieves high compatibility, making its applications more widespread.

[0037] Furthermore, in this embodiment, the lighting device driver 1 can achieve high compatibility through the aforementioned control mechanism based on input signal recognition, eliminating the need for additional circuit modules. Additionally, the circuit structure of the lighting device driver 1 can simultaneously implement both mains power mode and ballast mode. This significantly simplifies the circuit structure of the lighting device driver 1, substantially reducing its cost. Therefore, the lighting device driver 1 meets the requirements of practical applications.

[0038] Furthermore, in this embodiment, the lighting device driver 1 can achieve high compatibility through the aforementioned control mechanism based on input signal recognition, without requiring additional circuit modules. This significantly simplifies the circuit structure of the lighting device driver 1 and reduces the number of electronic components required. Consequently, the size of the lighting device driver 1 can be reduced to achieve miniaturization, making it compatible with future development trends.

[0039] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or changes made to the highly compatible lighting device driver according to this embodiment should still be included within the patent scope of the invention.

[0040] It is worth mentioning that while existing lamps compatible with mains power and ballast GH are very convenient to use, their complex circuit structures significantly increase costs. For the same reason, due to their complex circuit structures, these lamps require additional circuit modules and more electronic components; therefore, they require a large internal space, making it difficult to reduce their size. In contrast, according to an embodiment of the present invention, the lighting device driver 1 includes an input module 11, a rectifier module 12, a drive control module 13, and a power conversion module 14. The input module 11 couples to an external input signal. The rectifier module 12 is connected to the input module 11 and rectifies the input signal to generate a rectified signal Rs. The drive control module 13 is connected to the rectifier module 12 and includes a control unit 131 and a signal recognition unit 132 interconnected. A portion of the input signal Is' is coupled to the signal recognition unit 132, causing the signal recognition unit 132 to generate an identification signal Ns. The power conversion module 14 is connected to the drive control module 13, the control unit 131, and the load LD. The rectified signal Rs drives the load LD through the drive control module 13 and the power conversion module 14. The control unit 131 controls the power conversion module 14 to switch operating modes according to the frequency of the identification signal Ns. When the frequency of the identification signal Ns is greater than or equal to a preset frequency threshold, the control unit 131 enters ballast mode. In ballast mode, the control unit 131 generates a DC signal Cs1 to control the power conversion module 14's switching transistor to turn on. When the frequency of the identification signal Ns is lower than the preset frequency threshold, the control unit 131 enters AC mode. In AC mode, the control unit 131 generates a pulse width modulation signal Cs2 to control the power conversion module 14 to perform power conversion. Through this control mechanism based on input signal identification, the lighting device driver 1 can selectively output either the DC signal Cs1 or the pulse width modulation signal Cs2 to switch between AC mode and ballast mode. Therefore, the lighting device driver 1 achieves high compatibility, making its application more widespread.

[0041] Furthermore, according to embodiments of the present invention, the lighting device driver 1 can achieve high compatibility through the aforementioned control mechanism based on input signal recognition, without requiring additional circuit modules. In addition, the circuit structure of the lighting device driver 1 can simultaneously implement both mains power mode and ballast mode. This significantly simplifies the circuit structure of the lighting device driver 1, thereby substantially reducing its cost. Therefore, the lighting device driver 1 can meet the needs of practical applications.

[0042] Furthermore, according to embodiments of the present invention, the lighting device driver 1 can achieve high compatibility through the aforementioned control mechanism based on input signal recognition, without requiring additional circuit modules. In this way, the circuit structure of the lighting device driver 1 can be significantly simplified, and the number of electronic components required by the lighting device driver 1 can be reduced. Therefore, the size of the lighting device driver 1 can be reduced to achieve miniaturization, enabling the lighting device driver 1 to meet future development trends.

[0043] Furthermore, according to an embodiment of the present invention, the drive control module 13 of the lighting device driver 1 further includes an impedance identification and detection unit 133. The impedance identification and detection unit 133 is connected to the rectified signal output terminal VB+ of the rectifier module 12 and the control unit 131. The impedance identification and detection unit 133 detects the impedance of the rectified signal Rs. The control unit 131 enters a protection state when the impedance is greater than a preset impedance threshold value. The above-described impedance detection mechanism can effectively detect whether a human body resistance is connected to the lighting device driver 1, so as to prevent electric shock. Therefore, the safety performance of the lighting device driver 1 is greatly improved.

[0044] Furthermore, according to embodiments of the present invention, the circuit design of the lighting device driver 1 is simple, thus achieving the desired effect while reducing costs. Additionally, the circuit design of the lighting device driver 1 allows for a reduction in its size. Therefore, the lighting device driver 1 achieves high practicality to meet the needs of various applications. As can be seen from the above, the highly compatible lighting device driver according to embodiments of the present invention indeed achieves excellent technical results.

[0045] Please see Figure 2 This is a circuit diagram of the highly compatible lighting device driver 1 according to the second embodiment of the present invention, and please also refer to... Figure 1 . Figure 2 The circuit structure of the lighting device driver 1 is illustrated below. This embodiment is merely an example; the circuit structures of the input module 11, rectifier module 12, drive control module 13, and power conversion module 14 can be changed according to actual needs, and the present invention is not limited thereto. As shown in the figure, the lighting device driver 1 includes an input module 11, a rectifier module 12, a drive control module 13, and a power conversion module 14.

[0046] The input module 11 includes a first input terminal P1, a second input terminal P2, a third input terminal P3, and a fourth input terminal P4.

[0047] The rectifier module 12 is connected to the input module 11. The rectifier module 12 includes a first commutator BD1, a second commutator BD2, a first fuse F1, a second fuse F2, a third fuse F3, and a capacitor Cp. The first terminal of the first commutator BD1 is connected to the second input terminal P2; the second terminal of the first commutator BD1 is connected to the rectified signal output terminal VB+; the third terminal of the first commutator BD1 is connected to the first input terminal P1 via the first fuse F1; and the fourth terminal of the first commutator BD1 is connected to the first node N1. The first node N1 is connected to ground GND. The first terminal of the second commutator BD2 is connected to the fourth input terminal P4 via the third fuse F3; the second terminal of the second commutator BD2 is connected to the rectified signal output terminal VB+; the third terminal of the second commutator BD2 is connected to the third input terminal P3 via the second fuse F2; and the fourth terminal of the second commutator BD2 is connected to ground GND. In one embodiment, the first commutator BD1 and the second commutator BD2 may be bridge rectifiers (full-wave rectifiers or half-wave rectifiers). In another embodiment, the first commutator BD1 and the second commutator BD2 may also be transistors, circuits including transistors, or any existing circuits or electronic components with rectification functions.

[0048] The drive control module 13 is connected to the rectifier module 12. The drive control module 13 includes a control unit 131, a signal recognition unit 132, an impedance recognition and detection unit 133, and a DC signal smoothing unit 134, all interconnected. The control unit 131 may have at least one signal recognition interface, through which it is connected to the signal recognition unit 132. The DC signal smoothing unit 134 includes a first diode D1, an inductor L1, a first capacitor C1, and a second capacitor C2. The anode of the first diode D1 is connected to the rectified signal output terminal VB+; the cathode of the first diode D1 is connected to one end of the inductor L1 and to the first node N1 through the first capacitor C1. The other end of the inductor L1 is connected to the second node N2 and to the first node N1 through the second capacitor C2. The impedance recognition and detection unit 133 includes multiple resistors connected in series. In this embodiment, the impedance recognition and detection unit 133 includes a first resistor R1 and a second resistor R2. The two ends of the first resistor R1 are respectively connected to the rectified signal output terminal VB+ and the control unit 131. The two ends of the second resistor R2 are connected to the control unit 131 and the first node N1, respectively. The signal recognition unit 132 includes a third capacitor C3, which is connected to the first input terminal P1 through a capacitor Cp, so that a portion of the input signal Is' can be coupled to the third capacitor C3 (signal recognition unit 132). The control unit 131 includes a controller U1 (which may be, but is not limited to, a microcontroller).

[0049] The power conversion module 14 is connected to the control unit 131. The power conversion module 14 includes a switching unit 141, an output unit 143, and a sampling unit 142. The sampling unit 142 includes a first sampling resistor RS1 and a second sampling resistor RS2 connected in parallel. One end of the first sampling resistor RS1 is connected to a first node N1, and the other end of the first sampling resistor RS1 is connected to a third node N3. The switching unit 141 includes a switch Q1, which can be a gold oxide field-effect transistor. In another embodiment, the switch Q1 can also be a transistor or other similar component. The first end of the switch Q1 is connected to the control unit 131, the second end of the switch Q1 is connected to the third node N3, and the third end of the switch Q1 is connected to a fourth node N4; both the third node N3 and the fourth node N4 are connected to the control unit 131. The output unit 143 includes a second diode D2, an energy storage inductor LE, an electrolytic capacitor CE, a third resistor R3, a first output terminal T1, and a second output terminal T2. The positive and negative terminals of the second diode D2 are connected to the fourth node N4 and the second node N2, respectively. The two terminals of the energy storage inductor LE are connected to the fourth node N4 and the fifth node N5, respectively. The two terminals of the electrolytic capacitor CE are connected to the fifth node N5 and the second node N2, respectively. The two terminals of the third resistor R3 are connected to the fifth node N5 and the second node N2, respectively. The second node N2 and the fifth node N5 are then connected to the first output terminal T1 and the second output terminal T2, respectively.

[0050] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or changes made to the highly compatible lighting device driver according to this embodiment should still be included within the patent scope of the invention.

[0051] Please see Figure 3 and Figure 4 Please also refer to Figure 1 and Figure 2 . Figure 3 This is a schematic diagram of the mains power mode of a highly compatible lighting device driver according to a second embodiment of the present invention. Figure 4This is a schematic diagram of the pulse width modulation signal Cs2 of the high-compatibility lighting device driver according to the second embodiment of the present invention. As shown in the figure, the load LD includes multiple light sources LS, which can be light-emitting diodes. The load LD is connected to the first output terminal T1 and the second output terminal T2 of the output unit 143. When the input module 11 is connected to the mains power (Lt1, Nt1, Lt and Nt represent the output terminals of the mains power), the input module 11 couples the external input signal Is, and the rectifier module 12 rectifies the input signal Is to generate a rectified signal Rs. Then, a portion of the input signal Is' is coupled to the signal recognition unit 132 through the capacitor Cp of the rectifier module 12, causing the signal recognition unit 132 to generate a recognition signal Ns, as shown by arrow A2 in the figure. When the frequency of the recognition signal Ns is lower than a preset frequency threshold (this preset frequency threshold can be, but is not limited to, 22KHz, and can be adjusted according to actual needs), the control unit 131 enters the mains power mode, and the control unit 131 generates the pulse width modulation signal Cs2 (e.g., ...) in the mains power mode. Figure 4 (As shown) the power conversion module 14 is controlled to perform power conversion. In this case, the switching unit 141 is continuously turned on and off, so the power conversion module 14 can perform power conversion function. The impedance identification and detection unit 133 of the drive control module 13 detects the impedance of the rectified signal Rs, as shown by arrow A3 in the figure. The control unit 131 enters the protection state when the impedance is greater than the preset impedance threshold value (this preset impedance threshold value can be, but is not limited to, 400 ohms, and can be adjusted according to actual needs); this situation indicates that there may be human body resistance connected to the lighting device driver 1, and the control unit 131 turns off or stops sending signals to the switching unit 141 of the power conversion module 14. The DC signal smoothing unit 134 converts the rectified signal Rs into a smoothed DC signal Cs1 to power the drive control module 13, as shown by arrow A4 in the figure. The sampling unit 142 of the power conversion module 14 generates a feedback signal based on the peak current when the switching unit 141 is turned on, and the control unit 131 adjusts the pulse width modulation signal Cs2 according to the feedback signal, as shown by arrow A5 in the figure. The control unit 131 can also receive a zero-crossing detection signal from the fourth node N4 for zero-crossing detection. The rectified signal Rs drives the load LD through the power conversion module 14 (switching unit 141, output unit 143 and sampling unit 142), and the path of the rectified signal Rs is shown by arrow A1 in the figure.

[0052] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or changes made to the highly compatible lighting device driver according to this embodiment should still be included within the patent scope of the invention.

[0053] Please see Figure 5 and Figure 6 Please also refer to Figure 1 and Figure 2 . Figure 5This is a schematic diagram of the ballast mode of a highly compatible lighting device driver according to a second embodiment of the present invention. Figure 6 This is a schematic diagram of the DC signal Cs1 of the high-compatibility lighting device driver according to the second embodiment of the present invention. As shown, the load LD includes multiple light sources LS, which can be light-emitting diodes. The load LD is connected to the first output terminal T1 and the second output terminal T2 of the output unit 143. When the input module 11 is connected to the ballast GH, the input module 11 generates an input signal Is, and the rectifier module 12 rectifies the input signal Is to generate a rectified signal Rs. Then, a portion of the input signal Is' is coupled to the signal recognition unit 132 through the capacitor Cp of the rectifier module 12, causing the signal recognition unit 132 to generate an identification signal Ns, as shown by arrow A2 in the figure. When the frequency of the identification signal Ns is greater than a preset frequency threshold (this preset frequency threshold can be, but is not limited to, 22KHz, and can be adjusted according to actual needs), the control unit 131 enters the ballast mode. In the ballast mode, the control unit 131 generates a DC signal Cs1 (e.g., ...). Figure 6 (As shown) the power conversion module 14 switching transistor is directly connected. In this case, the switching unit 141 can remain in the on state to form a closed loop; thus, the rectified signal Rs generated after the signal input from the ballast GH is rectified can directly drive the load LD. The impedance identification and detection unit 133 of the drive control module 13 detects the impedance of the rectified signal Rs, as shown by arrow A3 in the figure. The control unit 131 enters a protection state when the impedance is greater than a preset impedance threshold value (this preset impedance threshold value can be, but is not limited to, 400 ohms, and can be adjusted according to actual needs); this situation indicates that there may be human body resistance connected to the lighting device driver 1, and the control unit 131 shuts down or stops sending signals to the switching unit 141 of the power conversion module 14. The DC signal smoothing unit 134 converts the rectified signal Rs into a smoothed DC signal Cs1 to power the drive control module 13, as shown by arrow A4 in the figure. The rectified signal Rs is smoothed twice by the power conversion module 14 (switching unit 141, output unit 143 and sampling unit 142) and then drives the load LD. The path of the rectified signal Rs is shown by arrow A1 in the figure.

[0054] As described above, through the control mechanism based on input signal recognition, the lighting device driver 1 can selectively output a DC signal Cs1 or a pulse width modulation signal Cs2 to switch between mains mode and ballast mode. Therefore, the lighting device driver 1 can achieve high compatibility, making its application more extensive.

[0055] Furthermore, in this embodiment, the lighting device driver 1 can achieve high compatibility through the aforementioned control mechanism based on input signal recognition, eliminating the need for additional circuit modules. Additionally, the circuit structure of the lighting device driver 1 can simultaneously implement both mains power mode and ballast mode. This significantly simplifies the circuit structure of the lighting device driver 1, substantially reducing its cost. Therefore, the lighting device driver 1 meets the requirements of practical applications.

[0056] Furthermore, in this embodiment, the lighting device driver 1 can achieve high compatibility through the aforementioned control mechanism based on input signal recognition, without requiring additional circuit modules. This significantly simplifies the circuit structure of the lighting device driver 1 and reduces the number of electronic components required. Consequently, the size of the lighting device driver 1 can be reduced to achieve miniaturization, making it compatible with future development trends.

[0057] Furthermore, in this embodiment, the drive control module 13 of the lighting device driver 1 also includes an impedance identification and detection unit 133. The impedance identification and detection unit 133 is connected to the rectified signal output terminal VB+ of the rectifier module 12 and the control unit 131. The impedance identification and detection unit 133 detects the impedance of the rectified signal Rs. The control unit 131 enters a protection state when the impedance is greater than a preset impedance threshold. The above-described impedance detection mechanism can effectively detect whether there is human body resistance connected to the lighting device driver 1, so as to prevent electric shock. Therefore, the safety performance of the lighting device driver 1 is greatly improved.

[0058] Of course, this embodiment is only for illustrative purposes and is not intended to limit the scope of the invention. Equivalent modifications or changes made to the highly compatible lighting device driver according to this embodiment should still be included within the patent scope of the invention.

[0059] In summary, according to an embodiment of the present invention, the lighting device driver 1 includes an input module 11, a rectifier module 12, a drive control module 13, and a power conversion module 14. The input module 11 couples to an external input signal. The rectifier module 12 is connected to the input module 11 and rectifies the input signal to generate a rectified signal Rs. The drive control module 13 is connected to the rectifier module 12 and includes a control unit 131 and a signal recognition unit 132 connected to each other. A portion of the input signal Is' is coupled to the signal recognition unit 132, causing the signal recognition unit 132 to generate an identification signal Ns. The power conversion module 14 is connected to the drive control module 13, the control unit 131, and the load LD. The rectified signal Rs drives the load LD through the drive control module 13 and the power conversion module 14. The control unit 131 controls the power conversion module 14 to switch operating modes according to the frequency of the identification signal Ns. The control unit 131 enters ballast mode when the frequency of the identification signal Ns is greater than or equal to a preset frequency threshold. In ballast mode, control unit 131 generates a DC signal Cs1 to control the power conversion module 14 to switch on. When the frequency of the identified signal Ns is lower than a preset frequency threshold, control unit 131 enters mains mode, generating a pulse width modulation signal Cs2 to control the power conversion module 14 to perform power conversion. Through this input signal identification-based control mechanism, the lighting device driver 1 can selectively output either the DC signal Cs1 or the pulse width modulation signal Cs2 to switch between mains mode and ballast mode. Therefore, the lighting device driver 1 achieves high compatibility, making its applications more widespread.

[0060] Furthermore, according to embodiments of the present invention, the lighting device driver 1 can achieve high compatibility through the aforementioned control mechanism based on input signal recognition, without requiring additional circuit modules. In addition, the circuit structure of the lighting device driver 1 can simultaneously implement both mains power mode and ballast mode. This significantly simplifies the circuit structure of the lighting device driver 1, thereby substantially reducing its cost. Therefore, the lighting device driver 1 can meet the needs of practical applications.

[0061] Furthermore, according to embodiments of the present invention, the lighting device driver 1 can achieve high compatibility through the aforementioned control mechanism based on input signal recognition, without requiring additional circuit modules. In this way, the circuit structure of the lighting device driver 1 can be significantly simplified, and the number of electronic components required by the lighting device driver 1 can be reduced. Therefore, the size of the lighting device driver 1 can be reduced to achieve miniaturization, enabling the lighting device driver 1 to meet future development trends.

[0062] Furthermore, according to an embodiment of the present invention, the drive control module 13 of the lighting device driver 1 further includes an impedance identification and detection unit 133. The impedance identification and detection unit 133 is connected to the rectified signal output terminal VB+ of the rectifier module 12 and the control unit 131. The impedance identification and detection unit 133 detects the impedance of the rectified signal. The control unit 131 enters a protection state when the impedance is greater than a preset impedance threshold value. The above-described impedance detection mechanism can effectively detect whether a human body resistance is connected to the lighting device driver 1, so as to prevent electric shock. Therefore, the safety performance of the lighting device driver 1 is greatly improved.

[0063] Furthermore, according to embodiments of the present invention, the circuit design of the lighting device driver 1 is simple, thus achieving the desired effect while reducing costs. Additionally, the circuit design of the lighting device driver 1 allows for a reduction in its size. Therefore, the lighting device driver 1 achieves high practicality to meet the needs of various applications.

[0064] 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 highly compatible lighting device driver, characterized in that, include: The input module is used to couple external input signals; A rectifier module, connected to the input module, is used to rectify the input signal to generate a rectified signal; A drive control module is connected to the rectifier module and includes a control unit and a signal recognition unit that are interconnected. A portion of the input signal is coupled to the signal recognition unit, causing the signal recognition unit to generate a recognition signal. as well as The power conversion module is connected to the drive control module, the control unit, and the load. The rectified signal drives the load through the drive control module and the power conversion module, and the control unit controls the power conversion module to switch operating modes according to the frequency of the identification signal.

2. The high-compatibility lighting device driver as described in claim 1, characterized in that, When the frequency of the identified signal is greater than or equal to a preset frequency threshold, the control unit enters ballast mode. In ballast mode, the control unit generates a DC signal to control the power conversion module switching transistor to be turned on.

3. The high-compatibility lighting device driver as described in claim 2, characterized in that, The power conversion module includes a switching unit, an output unit, and a sampling unit. The switching unit is connected to the output unit and the sampling unit, and the sampling unit is connected to the control unit. The rectified signal is smoothed twice by the switching unit, the output unit, and the sampling unit before driving the load.

4. The high-compatibility lighting device driver as described in claim 1, characterized in that, When the frequency of the identified signal is lower than a preset frequency threshold, the control unit enters the mains power mode. In the mains power mode, the control unit generates a pulse width modulation signal to control the power conversion module to perform power conversion.

5. The high-compatibility lighting device driver as described in claim 4, characterized in that, The power conversion module includes a switching unit, an output unit, and a sampling unit. The switching unit is connected to the output unit and the sampling unit, and the sampling unit is connected to the control unit. The rectified signal drives the load through the switching unit, the output unit, and the sampling unit. The sampling unit generates a feedback signal based on the peak current when the switching unit is turned on, and the control unit adjusts the pulse width modulation signal based on the feedback signal.

6. The high-compatibility lighting device driver as described in claim 1, characterized in that, The drive control module also includes an impedance identification and detection unit, which is connected to the rectified signal output terminal of the rectifier module and the control unit. The impedance identification and detection unit detects the impedance of the rectified signal, and the control unit enters a protection state when the impedance is greater than a preset impedance threshold value.

7. The high-compatibility lighting device driver as described in claim 6, characterized in that, The impedance identification and detection unit includes multiple resistors connected in series.

8. The high-compatibility lighting device driver as described in claim 1, characterized in that, The drive control module further includes a DC signal smoothing unit, which is connected to the rectified signal output terminal of the rectifier module and the control unit. The DC signal smoothing unit converts the rectified signal into a smoothed DC signal to power the drive control module.

9. The high-compatibility lighting device driver as described in claim 1, characterized in that, The signal recognition unit is a capacitor.

10. The high-compatibility lighting device driver as described in claim 9, characterized in that, The signal recognition unit is connected to the input module via another capacitor, so that a portion of the input signal is coupled to the signal recognition unit.

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