Lighting device with a multi-stage chip power supply mechanism to improve driving efficiency

Abstract

To provide a lighting device having a multi-stage chip power feeding mechanism that improves driving efficiency.SOLUTION: A lighting device includes a light-emitting module, a rectifier module, a preliminary start-up module, a power factor correction module, a voltage conversion module, and an auxiliary power supply module. The rectifier module generates a rectified voltage. The preliminary start-up module receives the rectified voltage to enter a start-up state and converts the rectified voltage into a preliminary start-up voltage. The power factor correction module receives the preliminary start-up voltage to enter a start-up state and converts the rectified voltage into a correction voltage. The voltage conversion module includes a voltage extraction unit. The voltage conversion module converts the correction voltage into a driving voltage for driving the light-emitting module, and the voltage extraction unit converts the driving voltage into an output voltage according to a default conversion ratio. The auxiliary power supply module converts the output voltage into a working voltage and drives the power factor correction module. After the power factor correction module is driven by the working voltage, the preliminary start-up module enters a closed state.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lighting device, and particularly to a lighting device having a multi-stage chip power supply mechanism for improving driving efficiency.

Background Art

[0002] With the continuous improvement of light-emitting diode lighting technology, the need for high-quality light-emitting diode drive power sources is also increasing. By combining an active power factor correction (APFC) circuit and a buck converter, it is possible to prevent changes in the input voltage from affecting the light generated by the lighting device and effectively eliminate flicker. Therefore, the combination of an active power factor correction (APFC) circuit and a buck converter has been increasingly widely used. However, as the light efficiency of light-emitting diodes increases, the power of the drive power source gradually decreases in order to ensure a stable light flux. However, with the decrease in the power of the drive power source, the problem of power supply loss in the drive chip itself has also attracted attention.

[0003] When a conventional drive power source is applied to a product with a wide input voltage range, the voltage difference for supplying power to the drive chip is large, resulting in large losses. Also, when the frequency changes, the voltage fluctuation for supplying power to the drive chip also becomes large, further increasing the losses. The above factors not only directly cause overheating of the drive chip but also affect its reliability.

[0004] Chinese Patent Application Publication No. 116685022 and Chinese Patent Application Publication No. 201328152 both disclose improved circuit structures, but still cannot effectively solve the problems of the prior art.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 1

[0006] The object of the present invention is to provide a lighting device having a multi-stage chip power supply mechanism that improves driving efficiency. [Means for solving the problem]

[0007] The present invention provides a lighting device having a multi-stage chip power supply mechanism that improves driving efficiency, including a light-emitting module, a rectifier module, a pre-start module, a power factor correction module, a voltage conversion module, and an auxiliary power supply module. The rectifier module generates a rectified voltage. The pre-start module receives the rectified voltage and enters a startup state, converting the rectified voltage to a pre-start voltage. The power factor correction module receives the pre-start voltage and enters a startup state, converting the rectified voltage to a correction voltage. The voltage conversion module includes a voltage extraction unit. The voltage conversion module converts the correction voltage to a drive voltage for driving the light-emitting module, and the voltage extraction unit converts the drive voltage to an output voltage according to a default conversion ratio. The auxiliary power supply module converts the output voltage to an operating voltage and drives the power factor correction module. After the power factor correction module is driven by the operating voltage, the pre-start module enters a closed state.

[0008] As an improvement to the present invention, the voltage extraction unit is a transformer.

[0009] As an improvement to the present invention, the pre-start module includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first switch, and a first diode. One end of the first resistor is connected to a first node, and the other end of the first resistor is connected to one end of the second resistor. The other end of the second resistor is connected to the first terminal of the first switch and the negative terminal of the first diode. The positive terminal of the first diode is connected to a second node. One end of the third resistor is connected to a first node, and the other end of the third resistor is connected to one end of the fourth resistor. The other end of the fourth resistor is connected to the second terminal of the first switch, and the third terminal of the first switch is connected to a third node. The first and second nodes are connected to the two output terminals of a rectifier module, respectively, and the third node is connected to the power supply pin of a power factor correction module.

[0010] As an improvement to the present invention, the second node is further connected to ground.

[0011] As an improvement to the present invention, the auxiliary power module includes a second diode, a fifth resistor, and an operating voltage output terminal. The positive terminal of the second diode is connected to a voltage extraction unit, and the negative terminal of the second diode is connected to one end of the fifth resistor. The other end of the fifth resistor is connected to the operating voltage output, which is connected to a third node.

[0012] As an improvement to the present invention, the lighting device further includes a filter module. The filter module is connected to an external power supply and a rectifier module.

[0013] As an improvement to the present invention, the lighting device further includes an input module. The filter module is connected to an external power supply via the input module.

[0014] As an improvement to the present invention, the lighting unit further includes a protection module. The protection module is installed between the filter module and the input module.

[0015] As an improvement to the present invention, the power factor correction module is an active power factor correction circuit.

[0016] As an improvement to the present invention, the voltage conversion module is a buck converter, a boost converter, a boost / buck converter, a flyback converter, or other similar component. [Effects of the Invention]

[0017] Based on the above, a lighting device having a multi-stage chip power supply mechanism that improves driving efficiency according to the disclosure of the present invention may have one or more of the following advantages. (1) According to the disclosure of the present invention, the lighting device includes a light-emitting module, a rectifier module, a pre-start module, a power factor correction module, a voltage conversion module, and an auxiliary power supply module. The rectifier module generates a rectified voltage. The pre-start module receives the rectified voltage and enters a startup state, converting the rectified voltage to a pre-start voltage. The power factor correction module receives the pre-start voltage and enters a startup state, converting the rectified voltage to a correction voltage. The voltage conversion module includes a voltage extraction unit. The voltage conversion module converts the correction voltage to a drive voltage for driving the light-emitting module, and the voltage extraction unit converts the drive voltage to an output voltage according to a default conversion ratio. The auxiliary power supply module converts the output voltage to an operating voltage and drives the power factor correction module. After the power factor correction module is driven by the operating voltage, the pre-start module enters a closed state. The multi-stage chip power supply mechanism described above includes a pre-start mode and a normal power supply mode, the pre-start mode being able to start the power factor correction module first when the lighting device is connected to an external power supply and being able to meet the requirement of a wide voltage input. Therefore, lighting devices can better meet the needs of actual applications. (2) In one embodiment of the present invention, the lighting device has a special multi-stage chip power supply mechanism that includes a pre-start mode and a normal power supply mode. The pre-start mode allows the power factor correction module to be started first when the lighting device is connected to an external power supply. The operating mechanism of the normal power supply mode is independent of the input voltage, so that the operating voltage of the control chip of the power factor correction circuit can be kept constant even if the input voltage changes, thereby achieving low losses. Therefore, the losses of the lighting device do not increase due to changes in the input voltage, the driving efficiency of the lighting device can be greatly improved, and the performance and reliability of the lighting device can be effectively improved. (3) In one embodiment of the present invention, the lighting device has a special multi-stage chip power supply mechanism that includes a pre-start mode and a normal power supply mode. The pre-start mode allows the power factor correction module to be started first when the lighting device is connected to an external power supply. The operating mechanism of the normal power supply mode is independent of changes in the operating frequency, and therefore, assuming that the operating frequency has changed, the operating voltage of the control chip of the power factor correction circuit can be kept constant, low losses can be achieved, the driving efficiency of the lighting device can be further improved, and the performance and reliability of the lighting device can be further improved. (4) In one embodiment of the present invention, the normal power supply mode of the multi-stage chip power supply mechanism of the lighting device can stably drive the control chip of the power factor correction module, enabling the control chip to maintain stable operation. In this way, the operating temperature of the control chip can be significantly reduced, the energy consumption of the lighting device can be reduced, and energy saving requirements can be better met. Therefore, the lighting device can be more adapted to future development trends. (5) In one embodiment of the present invention, the multi-stage chip power supply mechanism for the lighting device can be realized with a simple circuit, thereby achieving the desired effect without significantly increasing costs and improving the practicality of the lighting device. Therefore, the applications of the lighting device can be broadened and the requirements of different applications can be met. [Brief explanation of the drawing]

[0018] [Figure 1]It is a block diagram of a circuit structure of a lighting device having a multi-stage chip power supply mechanism for improving the driving efficiency according to the first embodiment of the present invention. [Figure 2] It is a circuit diagram of a lighting device having a multi-stage chip power supply mechanism for improving the driving efficiency according to the first embodiment of the present invention. [Figure 3] It is a circuit diagram of a lighting device having a multi-stage chip power supply mechanism for improving the driving efficiency according to the second embodiment of the present invention.

Embodiments for Carrying out the Invention

[0019] In the following embodiments, the detailed features and advantages of the present invention will be described, and the content is sufficient for those skilled in the art to understand the technical content of the present invention and enable them to implement it accordingly. Moreover, based on the disclosure content, claims, and drawings of this specification, those skilled in the art can easily understand the objectives and advantages of the present invention.

[0020] Hereinafter, referring to the related drawings, embodiments of a lighting device having a multi-stage chip power supply mechanism for improving the driving efficiency of the present invention will be described. However, for the sake of easy understanding and easy illustration in the drawings, each member in the drawings may be shown with exaggerated or reduced dimensions and ratios. In the following description and / or claims, when it is stated that a member "connects" or "couples" to another member, it may directly connect or couple to the other member, or there may be an intervening member. When it is stated that a member "directly connects" or "directly couples" to another member, there is no intervening member, and the same should be interpreted similarly for other terms used to explain the relationship between members or layers. For easy understanding, the same members in the following embodiments will be described with the same reference numerals.

[0021] FIG. 1 is a block diagram of a circuit structure of a lighting device having a multi-stage chip power supply mechanism for improving the driving efficiency according to the first embodiment of the present invention. As shown in the figure, the lighting device 1 includes an input module 11, a filter module 12, a rectification module 13, a power factor correction module 14, a voltage conversion module 15, a light-emitting module 16, a preliminary startup module 17, an auxiliary power supply module 18, and an output module 19.

[0022] The input module 11 is connected to an external power supply (not shown). In one embodiment, the external power supply may be a main power supply. In another embodiment, the external power supply may be a generator or another power grid capable of supplying an AC input voltage.

[0023] The filter module 12 is connected to the input module 11. In one embodiment, the filter module 12 may be an electromagnetic interference filter circuit. The circuit structure of the filter module 12 should be well known to those skilled in the art and can be modified as needed, so it will not be described in detail here.

[0024] The rectifier module 13 is connected to the filter module 12. In one embodiment, the rectifier module 13 may include a full-wave rectifier. In another embodiment, the rectifier module 13 may include a half-wave rectifier.

[0025] The power factor correction module 14 is connected to the rectifier module 13. In one embodiment, the power factor correction module 14 may be an active power factor correction voltage (boost circuit). In another embodiment, the power factor correction module 14 may be a passive power factor correction (passive PFC) circuit, a dynamic power factor correction (dynamic PFC) circuit, or other similar component. The circuit structure of the power factor correction module 14 should be well known to those skilled in the art and will not be described in detail here.

[0026] The voltage conversion module 15 is connected to the power factor correction module 14 and includes a voltage extraction unit 151. In one embodiment, the voltage conversion module 15 may be a buck converter. In another embodiment, the voltage conversion module 15 may be a boost converter, a buck-boost converter, a flyback converter, or other similar component. In one embodiment, the voltage extraction unit 151 is a transformer. In another embodiment, the voltage extraction unit 151 may be another component having a similar function.

[0027] The output module 19 is connected to the voltage conversion module 15, and the light-emitting module 16 is connected to the output module 19. In one embodiment, the light-emitting module 16 may include one or more light-emitting diodes (LEDs). In another embodiment, the light-emitting module 16 may be a light-emitting diode array or other similar component.

[0028] The pre-start module 17 is connected to the rectification module 13 and the power factor correction module 14.

[0029] The auxiliary power module 18 is connected to the power factor correction module 14 and the voltage conversion module 15.

[0030] The input module 11 receives an input voltage from an external power supply. The filter module 12 receives the input voltage, filters it, and generates a filtered voltage. The rectifier module 13 receives the filtered voltage, rectifies it, and generates a rectified voltage.

[0031] Subsequently, the pre-start module 17 can first execute a pre-start mode, receive a rectified voltage, and enter the start-up state. Next, the pre-start module 17 converts the rectified voltage into a pre-start voltage to drive the power factor correction module 14, causing the power factor correction module 14 to enter the start-up state.

[0032] Next, after the power factor correction module 14 enters the startup state, it receives the rectified voltage and converts the rectified voltage into a correction voltage. Then, the voltage conversion module 15 receives the correction voltage and converts it into a drive voltage to drive the light-emitting module 16 via the output module 19.

[0033] Finally, the voltage extraction unit 151 of the voltage conversion module 15 converts the drive voltage to an output voltage according to the default conversion ratio, and the auxiliary power module 18 can perform normal power supply mode and convert the output voltage to an operating voltage, which drives the power factor correction module 14. After the power factor correction module 14 is driven by the operating voltage, the pre-start module 17 enters a closed state.

[0034] The multi-stage chip power supply mechanism described above includes a pre-start mode and a normal power supply mode. In the pre-start mode, when the lighting device 1 is connected to an external power supply, the power factor correction module 14 can be started first. Subsequently, the auxiliary power supply module 18 can operate in normal power supply mode to drive the power factor correction module 14.

[0035] The multi-stage chip power supply mechanism described above can meet the requirements of a wide range of voltage inputs and satisfy the demands of actual applications. Furthermore, the losses of the lighting device 1 do not increase with changes in input voltage or operating frequency, significantly improving the driving efficiency of the lighting device 1 and effectively enhancing its performance and reliability.

[0036] Naturally, this embodiment is for illustrative purposes only and does not limit the scope of the present invention. Equivalent modifications or changes based on a lighting device having a multi-stage chip power supply mechanism that improves the driving efficiency of this embodiment should still be included within the scope of protection of the present invention.

[0037] Figure 2 is a circuit diagram of a lighting device having a multi-stage chip power supply mechanism that improves the driving efficiency of the first embodiment of the present invention. As shown in the figure, the lighting device 1 includes an input module 11, a filter module 12, a rectifier module 13, a power factor correction module 14, a voltage conversion module 15, a light-emitting module 16, a pre-start module 17, an auxiliary power supply module 18, and an output module 19.

[0038] The input module 11 is connected to an external power supply (not shown) and includes a live input terminal Lt and a neutral input terminal Nt.

[0039] The filter module 12 is connected to the input module 11. The filter module 12 includes a first inductor L1, a first capacitor C1, and a sixth resistor R6.

[0040] The rectifier module 13 is connected to the filter module 12. The rectifier module 13 may include a rectifier BD and a second capacitor C2.

[0041] The power factor correction module 14 is connected to the rectifier module 13. The power factor correction module 14 may be an active power factor correction voltage. The power factor correction module 14 includes a control chip U1, a second inductor L2, a third diode D3, a fourth diode D4, a seventh resistor R7, a first current limiting resistor RS1, a second switch Q2, a first electrolytic capacitor EC1, and a third capacitor C2. The control chip U1 has a power supply pin Pn1 and a control pin Pn2.

[0042] The voltage conversion module 15 is connected to the power factor correction module 14. The voltage conversion module 15 includes a fifth diode D5, a third switch Q3, a second current limiting resistor RS2, a second electrolytic capacitor EC2, and a voltage extraction unit 151. The voltage extraction unit 151 may include a transformer Tm.

[0043] The output module 19 is connected to the voltage conversion module 15, and the light-emitting module 16 is connected to the output module 19. The output module 19 includes a positive output terminal LED+ and a negative output terminal LED-. The light-emitting module 16 may include multiple light-emitting diodes LD.

[0044] The pre-start module 17 is connected to the rectifier module 13 and the power factor correction module 14. The pre-start module 17 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first switch Q1, and a first diode D1. In this embodiment, the first switch Q1 is a band jig (BJT). In another embodiment, the first switch Q1 may be a metal oxide half-field effect transistor (MOSFET). In this embodiment, the first diode D1 may be a Zener diode. In another embodiment, the first diode D1 may be a general-purpose diode. One end of the first resistor R1 is connected to the first node N1, and the other end of the first resistor R1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to the first terminal (base) of the first switch Q1 and the negative terminal of the first diode D1, and the positive terminal of the first diode D1 is connected to the second node N2. One end of the third resistor R3 is connected to the first node N1, and the other end of the third resistor R3 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to the second terminal (collector) of the first switch Q1, and the third terminal (emitter) of the first switch Q1 is connected to the third node N3. The first node N1 and the second node N2 are each connected to the two output terminals of the rectifier module 13. The second node N2 is further connected to ground GND. The third node N3 is connected to the power supply pin Pn1 of the power factor correction module 14.

[0045] The auxiliary power module 18 is connected to the power factor correction module 14 and the voltage conversion module 15. The auxiliary power module 18 includes a second diode D2, a fifth resistor R5, and an operating voltage output terminal Pt. The positive terminal of the second diode D2 is connected to the voltage extraction unit 151, and the negative terminal of the second diode D2 is connected to one end of the fifth resistor R5. The other end of the fifth resistor R5 is connected to the operating voltage output terminal Pt, which is connected to the third node N3.

[0046] The input module 11 receives an input voltage from an external power supply. The filter module 12 receives the input voltage, filters it, and generates a filtered voltage. The rectifier module 13 receives the filtered voltage, rectifies it, and generates a rectified voltage. Subsequently, the pre-start module 17 can first perform a pre-start mode and receive a rectified voltage. Next, the rectified voltage forms a path between the first resistor R1, the second resistor R2, and the first diode D1. Since the base current required to turn on the first switch Q1 (transistor) is very small, the resistance values ​​of its current limiting resistors (first resistor R1 and second resistor R2) can be very high (greater than 2MΩ), thus effectively reducing losses. After the first diode D1 is turned on, the current passes through the third resistor R3, the fourth resistor R4, and the first switch Q1, and then through the collector and emitter of the first switch Q1 to power the control chip U1, putting the control chip U1 into the start state. The resistance values ​​of the third resistor R3 and the fourth resistor R4 can be appropriately adjusted according to the specifications of the control chip U1, allowing the control chip U1 to start even at low voltages and meeting the requirements for a wide range of voltage inputs.

[0047] Next, after the control chip U1 enters the startup state, the power factor correction module 14 receives the rectified voltage and converts it into a correction voltage. Then, the voltage conversion module 15 receives the correction voltage and converts it into a drive voltage to drive the light-emitting module 16 via the output module 19.

[0048] Finally, after the lighting device 1 enters normal operation, the current passes through the positive output terminal LED+ and the negative output terminal LED-, then through the transformer Tm, and then through the third switch Q3. When the third switch Q3 is closed, the current passes through the fifth diode D5 to form a freewheel loop. At this time, the voltage of the primary winding of the transformer Tm matches the load voltage of the light-emitting module 16. Therefore, the default conversion ratio of the transformer can be set so that the voltage of the secondary winding of the transformer Tm is greater than the minimum normal operating voltage of the control chip U1, and the stable voltage value of the first diode D1 can be set lower than the minimum normal operating voltage of the control chip U1. In this way, the voltage of the secondary winding of the transformer Tm continues to convert the drive voltage to the output voltage. The auxiliary power module 18 can perform a normal power supply mode to convert the output voltage to the operating voltage and output the operating voltage via the operating voltage output terminal Pt to drive the control chip U1. Since the voltage of the primary winding of transformer Tm matches the load voltage of the light-emitting module 16, the voltage of the secondary winding of transformer Tm is also constant and does not change with changes in input voltage or operating frequency. After the power factor correction module 14 is driven by the operating voltage, the base voltage of the first switch Q1 becomes lower than the operating voltage output from the operating voltage output terminal Pt, so the first switch Q1 enters the closed state, disconnecting the third resistor R3 and the fourth resistor R4 from the power supply pin Pn1, and ending the pre-start mode.

[0049] From the above, it can be seen that the lighting device 1 has a special multi-stage chip power supply mechanism that includes a pre-start mode and a normal power supply mode. In the pre-start mode, when the lighting device 1 is connected to an external power supply, the power factor correction module 14 can be started first. The operating mechanism of the normal power supply mode is independent of the input voltage, so even if the input voltage changes, the operating voltage of the control chip U1 of the power factor correction module 14 can be kept constant, achieving low losses. Therefore, the losses of the lighting device 1 do not increase with changes in the input voltage, the driving efficiency of the lighting device 1 can be greatly improved, and the performance and reliability of the lighting device 1 can be effectively improved.

[0050] Furthermore, the lighting device 1 has a special multi-stage chip power supply mechanism that includes a pre-start mode and a normal power supply mode. In the pre-start mode, the power factor correction module 14 can be started first when the lighting device 1 is connected to an external power supply. The operating mechanism of the normal power supply mode is independent of changes in the operating frequency, so it is possible to maintain a constant operating voltage of the control chip U1 of the power factor correction module 14, assuming that the operating frequency will change, thereby achieving low losses, further improving the driving efficiency of the lighting device 1, and further improving the performance and reliability of the lighting device 1.

[0051] Furthermore, the normal power supply mode of the multi-stage chip power supply mechanism of the lighting device 1 can stably drive the control chip U1 of the power factor correction module 1, enabling the control chip U1 to maintain stable operation. In this way, the operating temperature of the control chip U1 can be significantly reduced, the energy consumption of the lighting device 1 can be reduced, and energy saving requirements can be further met. Therefore, the lighting device 1 can be more adapted to future development trends.

[0052] Naturally, this embodiment is for illustrative purposes only and does not limit the scope of the present invention. Equivalent modifications or changes based on a lighting device having a multi-stage chip power supply mechanism that improves the driving efficiency of this embodiment should still be included within the scope of protection of the present invention.

[0053] Conventional drive power supplies, when applied to products with a wide input voltage range, suffer significant losses due to the large voltage difference supplied to the drive chip. Furthermore, when the frequency changes, the voltage fluctuations supplied to the drive chip also increase, further increasing losses. These factors not only directly lead to overheating of the drive chip but also affect its reliability. In contrast, according to the first embodiment of the present invention, the lighting device includes a light-emitting module, a rectifier module, a pre-start module, a power factor correction module, a voltage conversion module, and an auxiliary power supply module. The rectifier module generates a rectified voltage. The pre-start module receives the rectified voltage, enters a startup state, and converts the rectified voltage to a pre-start voltage. The power factor correction module receives the pre-start voltage, enters a startup state, and converts the rectified voltage to a correction voltage. The voltage conversion module includes a voltage extraction unit. The voltage conversion module converts the correction voltage to a drive voltage for driving the light-emitting module, and the voltage extraction unit converts the drive voltage to an output voltage according to a default conversion ratio. The auxiliary power supply module converts the output voltage to an operating voltage and drives the power factor correction module. After the power factor correction module is driven by the operating voltage, the pre-start module enters a closed state. The multi-stage chip power supply mechanism described above includes a pre-start mode and a normal power supply mode. The pre-start mode allows the power factor correction module to be started first when the lighting device is connected to an external power supply, and can also meet the requirements for a wide voltage input. Therefore, the lighting device can better meet the needs of actual applications.

[0054] Furthermore, according to the first embodiment of the present invention, the lighting device has a special multi-stage chip power supply mechanism that includes a pre-start mode and a normal power supply mode. In the pre-start mode, the power factor correction module can be activated first when the lighting device is connected to an external power supply. The operating mechanism of the normal power supply mode is independent of the input voltage, so that the operating voltage of the control chip of the power factor correction circuit can be kept constant even if the input voltage changes, thereby achieving low losses. Therefore, the losses of the lighting device do not increase due to changes in the input voltage, the driving efficiency of the lighting device can be greatly improved, and the performance and reliability of the lighting device can be effectively improved.

[0055] Furthermore, according to the first embodiment of the present invention, the lighting device has a special multi-stage chip power supply mechanism that includes a pre-start mode and a normal power supply mode. The pre-start mode allows the power factor correction module to be activated first when the lighting device is connected to an external power supply. The operating mechanism of the normal power supply mode is independent of changes in the operating frequency, and therefore, assuming that the operating frequency has changed, the operating voltage of the control chip of the power factor correction circuit can be kept constant, low losses can be achieved, the driving efficiency of the lighting device can be further improved, and the performance and reliability of the lighting device can be further improved.

[0056] Furthermore, according to the first embodiment of the present invention, the normal power supply mode of the multi-stage chip power supply mechanism of the lighting device can stably drive the control chip of the power factor correction module, enabling the control chip to maintain stable operation. In this way, the operating temperature of the control chip can be significantly reduced, the energy consumption of the lighting device can be reduced, and energy saving requirements can be better met. Therefore, the lighting device can better adapt to future development trends.

[0057] Furthermore, according to the first embodiment of the present invention, the multi-stage chip power supply mechanism for the lighting device can be realized with a simple circuit, thereby achieving the desired effect without significantly increasing costs and improving the practicality of the lighting device. Therefore, it is possible to broaden the applications of the lighting device and meet the requirements of different applications. From the above, it can be seen that a lighting device having a multi-stage chip power supply mechanism that improves driving efficiency based on the embodiment of the present invention can certainly achieve excellent technical effects.

[0058] Figure 3 is a circuit diagram of a lighting device having a multi-stage chip power supply mechanism that improves the driving efficiency of a second embodiment of the present invention. As shown in the figure, the lighting device 1 includes an input module 11, a filter module 12, a rectifier module 13, a power factor correction module 14, a voltage conversion module 15, a light-emitting module 16, a pre-start module 17, an auxiliary power supply module 18, and an output module 19.

[0059] The input module 11 is connected to an external power supply (not shown) and includes a live input terminal Lt and a neutral input terminal Nt.

[0060] The filter module 12 is connected to the input module 11. The filter module 12 includes a first inductor L1, a first capacitor C1, and a sixth resistor R6.

[0061] The rectifier module 13 is connected to the filter module 12. The rectifier module 13 may include a rectifier BD and a second capacitor C2.

[0062] The power factor correction module 14 is connected to the rectifier module 13. The power factor correction module 14 may be an active power factor correction voltage. The power factor correction module 14 includes a control chip U1, a second inductor L2, a third diode D3, a fourth diode D4, a seventh resistor R7, a first current limiting resistor RS1, a second switch Q2, a first electrolytic capacitor EC1, and a third capacitor C2. The control chip U1 has a power supply pin Pn1 and a control pin Pn2.

[0063] The voltage conversion module 15 is connected to the power factor correction module 14. The voltage conversion module 15 includes a fifth diode D5, a third switch Q3, a second current limiting resistor RS2, a second electrolytic capacitor EC2, and a voltage extraction unit 151. The voltage extraction unit 151 may include a transformer Tm.

[0064] The output module 19 is connected to the voltage conversion module 15, and the light-emitting module 16 is connected to the output module 19. The output module 19 includes a positive output terminal LED+ and a negative output terminal LED-. The light-emitting module 16 may include multiple light-emitting diodes LD.

[0065] The pre-start module 17 is connected to the rectifier module 13 and the power factor correction module 14. The pre-start module 17 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first switch Q1, and a first diode D1. In this embodiment, the first switch Q1 is a triode (BJT). In another embodiment, the first switch Q1 may be a metal-oxide-semi-field-effect transistor (MOSFET). In this embodiment, the first diode D1 may be a Zener diode. In another embodiment, the first diode D1 may be a general-purpose diode. One end of the first resistor R1 is connected to the first node N1, and the other end of the first resistor R1 is connected to one end of the second resistor R2. The other end of the second resistor R2 is connected to the first terminal (base) of the first switch Q1 and the negative terminal of the first diode D1, and the positive terminal of the first diode D1 is connected to the second node N2. One end of the third resistor R3 is connected to the first node N1, and the other end of the third resistor R3 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to the second terminal (collector) of the first switch Q1, and the third terminal (emitter) of the first switch Q1 is connected to the third node N3. The first node N1 and the second node N2 are each connected to the two output terminals of the rectifier module 13. The second node N2 is further connected to ground GND. The third node N3 is connected to the power supply pin Pn1 of the power factor correction module 14.

[0066] The auxiliary power module 18 is connected to the power factor correction module 14 and the voltage conversion module 15. The auxiliary power module 18 includes a second diode D2, a fifth resistor R5, and an operating voltage output terminal Pt. The positive terminal of the second diode D2 is connected to the voltage extraction unit 151, and the negative terminal of the second diode D2 is connected to one end of the fifth resistor R5. The other end of the fifth resistor R5 is connected to the operating voltage output terminal Pt, which is connected to the third node N3.

[0067] Since the above components are the same as those in the previously described embodiment, a detailed description is omitted here. Unlike the previously described embodiment, the lighting device 1 of this embodiment further includes a protection module 10. The protection module 10 is installed between the filter module 12 and the input module 11. In this embodiment, the protection module 10 includes a fuse Fs. In another embodiment, the protection module 10 may be another circuit with an overcurrent protection function. The above circuit design further improves the safety of the lighting device 1 and allows the lighting device 1 to better meet the needs of actual applications.

[0068] Naturally, this embodiment is for illustrative purposes only and does not limit the scope of the present invention. Equivalent modifications or changes based on a lighting device having a multi-stage chip power supply mechanism that improves the driving efficiency of this embodiment should still be included within the scope of protection of the present invention.

[0069] In summary, according to the first embodiment of the present invention, the lighting device includes a light-emitting module, a rectifier module, a pre-start module, a power factor correction module, a voltage conversion module, and an auxiliary power supply module. The rectifier module generates a rectified voltage. The pre-start module receives the rectified voltage and enters a startup state, converting the rectified voltage to a pre-start voltage. The power factor correction module receives the pre-start voltage and enters a startup state, converting the rectified voltage to a correction voltage. The voltage conversion module includes a voltage extraction unit. The voltage conversion module converts the correction voltage to a drive voltage for driving the light-emitting module, and the voltage extraction unit converts the drive voltage to an output voltage according to a default conversion ratio. The auxiliary power supply module converts the output voltage to an operating voltage and drives the power factor correction module. After the power factor correction module is driven by the operating voltage, the pre-start module enters a closed state. The multi-stage chip power supply mechanism described above includes a pre-start mode and a normal power supply mode, the pre-start mode being able to start the power factor correction module first when the lighting device is connected to an external power supply and being able to meet the requirement of a wide voltage input. Therefore, lighting devices can better meet the needs of actual applications.

[0070] Furthermore, according to the first embodiment of the present invention, the lighting device has a special multi-stage chip power supply mechanism that includes a pre-start mode and a normal power supply mode. In the pre-start mode, the power factor correction module can be activated first when the lighting device is connected to an external power supply. The operating mechanism of the normal power supply mode is independent of the input voltage, so that the operating voltage of the control chip of the power factor correction circuit can be kept constant even if the input voltage changes, thereby achieving low losses. Therefore, the losses of the lighting device do not increase due to changes in the input voltage, the driving efficiency of the lighting device can be greatly improved, and the performance and reliability of the lighting device can be effectively improved.

[0071] Furthermore, according to the first embodiment of the present invention, the lighting device has a special multi-stage chip power supply mechanism that includes a pre-start mode and a normal power supply mode. The pre-start mode allows the power factor correction module to be activated first when the lighting device is connected to an external power supply. The operating mechanism of the normal power supply mode is independent of changes in the operating frequency, and therefore, assuming that the operating frequency has changed, the operating voltage of the control chip of the power factor correction circuit can be kept constant, low losses can be achieved, the driving efficiency of the lighting device can be further improved, and the performance and reliability of the lighting device can be further improved.

[0072] Furthermore, according to the first embodiment of the present invention, the normal power supply mode of the multi-stage chip power supply mechanism of the lighting device can stably drive the control chip of the power factor correction module, enabling the control chip to maintain stable operation. In this way, the operating temperature of the control chip can be significantly reduced, the energy consumption of the lighting device can be reduced, and energy saving requirements can be better met. Therefore, the lighting device can better adapt to future development trends.

[0073] Furthermore, according to the first embodiment of the present invention, the multi-stage chip power supply mechanism for the lighting device can be realized with a simple circuit, thereby achieving the desired effect without significantly increasing costs and improving the practicality of the lighting device. Therefore, it is possible to broaden the applications of the lighting device and meet the requirements of different applications. From the above, it can be seen that a lighting device having a multi-stage chip power supply mechanism that improves driving efficiency based on the embodiment of the present invention can certainly achieve excellent technical effects.

[0074] While the embodiments described herein are explained, it should be noted that this does not limit the scope of the claims of the present invention. Therefore, any changes and modifications to the embodiments described herein, or substitution of equivalent structures or processes using the contents of the specification and drawings of the present invention, or direct or indirect application of the above-described technology to other related technical fields, based on the innovative concept of the present invention, are all included within the scope of the claims of the present invention. [Explanation of Symbols]

[0075] 1. Lighting device 11 Input Modules 12 Filter Modules 13 Rectifier Module 14 Power Factor Correction Module 15 Voltage conversion module 151 Voltage Extraction Unit 16 Light-emitting modules 17. Backup boot module 18 Auxiliary power module 19 Output Modules U1 control chip L1 First Inductor L2 Second Inductor C1 First capacitor C2 Second capacitor C3 Third capacitor EC1 First electrolytic capacitor EC2 Second electrolytic capacitor R1 is the first resistor. R2 2nd resistor R3 3rd resistor R4 4th resistor R5 5th resistor R6 6th resistor R7 7th resistor RS1 First current limiting resistor RS2 Second Current Limiting Resistor D1 First Diode D2 Second Bypass D3 Third Diode D4 4th diode D5 5th Diode LD (Light Emitting Diode) BD rectifier Tm transformer Fs fuse Lt Live Input Terminal Q1 First switch Q2 Second switch Q3 Third switch Nt Neutral Input Terminal LED+ Positive Output Terminal LED - Negative Output Terminal Pn1 Power supply pin Pn2 control pin Pt operating voltage output terminal N1 First Node N2 Second Node N3 3rd Node GND (Ground)

Claims

1. Light-emitting module and A rectifier module that generates a rectified voltage, A pre-start module that receives the rectified voltage and enters a startup state, and converts the rectified voltage into a pre-start voltage, comprising a pre-start module including a first diode, A power factor correction module that receives the aforementioned preliminary startup voltage, enters a startup state, and converts the rectified voltage into a correction voltage, comprising a power factor correction module including a control chip, A voltage conversion module that receives the correction voltage and converts it into a drive voltage for driving the light-emitting module, the voltage conversion module includes a voltage extraction unit that converts the drive voltage into an output voltage according to a default conversion ratio, An auxiliary power supply module that converts the output voltage into an operating voltage for driving the power factor correction module, Equipped with, After the power factor correction module is driven by the operating voltage, the pre-start module enters a closed state in which the connection is disconnected. The voltage extraction unit is a transformer including a primary winding and a secondary winding, A lighting device having a multi-stage chip power supply mechanism that improves driving efficiency, characterized in that the default conversion ratio of the transformer is set such that the voltage of the secondary winding of the transformer is greater than the minimum value of the normal operating voltage of the control chip, and the stable voltage value of the first diode is set lower than the minimum value of the normal operating voltage of the control chip.

2. The pre-start module further includes a first resistor, a second resistor, a third resistor, a fourth resistor, and a first switch, wherein one end of the first resistor is connected to a first node, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to the negative terminal of the first switch and the first diode, the positive terminal of the first diode is connected to a second node, one end of the third resistor is connected to the first node, the other end of the third resistor is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the second terminal of the first switch, the third terminal of the first switch is connected to a third node, the first node and the second node are each connected to two output terminals of the rectifier module, and the third node is connected to the power supply pin of the power factor correction module, characterized in that the lighting device has a multi-stage chip power supply mechanism that improves the driving efficiency as described in 1.

3. The lighting device having a multi-stage chip power supply mechanism that improves the driving efficiency, characterized in that the second node is further connected to ground, as described in 2.

4. The lighting device having a multi-stage chip power supply mechanism that improves driving efficiency, as described in 3, wherein the auxiliary power supply module includes a second diode, a fifth resistor, and an operating voltage output terminal, the positive terminal of the second diode is connected to the voltage extraction unit, the negative terminal of the second diode is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the operating voltage output terminal, and the operating voltage output terminal is connected to the third node.

5. A lighting device having a multi-stage chip power supply mechanism that improves the driving efficiency, further comprising an external power supply and a filter module connected to the rectifier module, as described in claim 1.

6. A lighting device having a multi-stage chip power supply mechanism that improves driving efficiency, further comprising an input module, wherein the filter module is connected to an external power supply via the input module, as described in claim 5.

7. A lighting device having a multi-stage chip power supply mechanism for improving drive efficiency, further comprising a protection module installed between the filter module and the input module, as described in 6.

8. The lighting device having a multi-stage chip power supply mechanism that improves the driving efficiency, characterized in that the power factor correction module is an active power factor correction circuit, as described in claim 1.

9. The lighting device having a multi-stage chip power supply mechanism that improves the drive efficiency, characterized in that the voltage conversion module is a step-down converter, a step-up converter, a step-up / step-down converter, or a flyback converter, as described in claim 1.

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