Modular lighting device with high conversion efficiency

Abstract

A high conversion efficiency modular lighting device includes a power supply module and a light source module. The power supply module includes an input unit having a positive terminal and a negative terminal, the input unit being connected with a constant voltage power supply. The light source module includes a first terminal, a second terminal, a plurality of light sources and a constant current control unit. The constant current control unit includes a drive switch, a control switch and a first resistor. The first terminal and the second terminal are connected with the positive terminal and the negative terminal respectively. The plurality of light sources are connected in series to form a serial circuit having a power supply node, one end of the serial circuit being connected with the first terminal. The first end, the second end and the third end of the drive switch are connected with a first node, the other end of the serial circuit and a second node respectively. The first end, the second end and the third end of the control switch are connected with the second node, the first node and the second terminal respectively. The two ends of the first resistor are connected with the second node and the second terminal respectively. The first node is connected with the power supply node.

Description

TECHNICAL FIELD

[0001] The present application relates to a lighting device, in particular, a high conversion efficiency modular lighting device. BACKGROUND

[0002] The existing down lamp mainly adopts constant current power chip control, and each down lamp needs a junction box for wiring operation. Therefore, the installation operation of the existing down lamp needs to spend more time, which increases the installation cost.

[0003] In addition, the existing down lamp mostly uses a linear chip with constant current function to supply power for the light source, so the working voltage of the linear chip needs to be considered in the circuit design, and there needs to be a pressure difference between the power supply and the load, which provides power consumption and reduces the conversion efficiency. Therefore, the light efficiency of the existing down lamp is also reduced.

[0004] Therefore, how to propose a lighting device to solve the above problems of the prior art has become an urgent issue. SUMMARY

[0005] According to an embodiment of the present application, a high conversion efficiency modular lighting device is provided, which comprises a power supply module and a light source module. The power supply module comprises an input unit with a positive terminal and a negative terminal, and the input unit is connected with a constant voltage power supply. The light source module comprises a first terminal, a second terminal, a plurality of light sources and a constant current control unit. The constant current control unit comprises a drive switch, a control switch and a first resistor. The first terminal and the second terminal are connected with the positive terminal and the negative terminal respectively. The plurality of light sources are connected in series to form a serial circuit with a power supply node, one end of the serial circuit is connected with the first terminal. The first end, the second end and the third end of the drive switch are connected with the first node, the other end of the serial circuit and the second node respectively. The first end, the second end and the third end of the control switch are connected with the second node, the first node and the second terminal respectively. The two ends of the first resistor are connected with the second node and the second terminal respectively. The first node is connected with the power supply node.

[0006] In an embodiment, the power supply node is located between two adjacent light sources.

[0007] In an embodiment, the constant current control unit further comprises a second resistor. The first node is connected with the power supply node through the second resistor.

[0008] In an embodiment, the power supply module further comprises a protection unit. The positive terminal and the negative terminal are connected with the first terminal and the second terminal respectively through the protection unit.

[0009] In an embodiment, the protection unit comprises a transient voltage suppression diode to provide an overvoltage protection function.

[0010] In an embodiment, the power supply module further comprises an adjusting unit. The positive terminal and the negative terminal are connected with the protection unit. The protection unit is connected with the first terminal and the second terminal through the adjusting unit.

[0011] In an embodiment, the adjusting unit comprises an adjusting capacitor to provide a brightness adjusting function.

[0012] In an embodiment, the adjusting unit further comprises a protection resistor to provide an over-current protection function.

[0013] In an embodiment, the power supply module further comprises an intelligent control unit. The positive terminal and the negative terminal are connected with the protection unit. The protection unit is connected with the adjusting unit. The adjusting unit is connected with the intelligent control unit. The intelligent control unit is connected with the first terminal and the second terminal.

[0014] In an embodiment, the intelligent control unit receives a lighting mode adjusting signal to adjust the lighting mode of the light source module according to the lighting mode adjusting signal.

[0015] As mentioned above, the high conversion efficiency modular lighting device according to the embodiments of the present application can have one or more of the following advantages:

[0016] (1) In an embodiment of the present application, the modular lighting device comprises a power supply module and a light source module. The power supply module comprises an input unit having a positive terminal and a negative terminal, and the input unit is connected with a constant voltage power supply. The light source module comprises a first terminal, a second terminal, a plurality of light sources and a constant current control unit. The constant current control unit comprises a driving switch, a control switch and a first resistor. The first terminal and the second terminal are connected with the positive terminal and the negative terminal respectively. The plurality of light sources are connected in series to form a serial circuit having a power supply node, and one end of the serial circuit is connected with the first terminal. The first end, the second end and the third end of the driving switch are connected with a first node, the other end of the serial circuit and a second node respectively. The first end, the second end and the third end of the control switch are connected with the second node, the first node and the second terminal respectively. The two ends of the first resistor are connected with the second node and the second terminal respectively. The first node is connected with the power supply node. The power supply node is located between two adjacent light sources. As mentioned above, the light source module can form a serial circuit having a power supply node, and the driving switch of the constant current control unit is powered through the power supply node. In this way, the constant current control unit does not need to be powered through the constant voltage power supply or the operating voltage supply, and does not need a voltage stabilizing tube and a voltage dividing resistor, which can greatly reduce the power loss. Therefore, the conversion efficiency of the constant current control unit can be greatly improved, and the light efficiency of the modular lighting device is also greatly improved.

[0017] (2) In an embodiment of the present application, the power supply module further comprises a protection unit. The positive terminal and the negative terminal are connected to the first terminal and the second terminal through the protection unit. The protection unit comprises a transient voltage suppression diode to provide overvoltage protection function. In this way, the protection unit can effectively suppress transient voltage to provide overvoltage protection function for the modular lighting device. Therefore, the reliability of the modular lighting device can be greatly improved to meet the needs of practical applications.

[0018] (3) In an embodiment of the present application, the modular lighting device further comprises an adjustment unit. The positive terminal and the negative terminal are connected to the protection unit, and the protection unit is connected to the first terminal and the second terminal through the adjustment unit. The adjustment unit comprises an adjustment capacitor to provide brightness adjustment function. Therefore, the modular lighting device can achieve gradual brightness starting function through the adjustment capacitor, so that the lighting function of the modular lighting device can provide users with good user experience.

[0019] (4) In an embodiment of the present application, the adjustment unit of the modular lighting device further comprises a protection resistor to provide overcurrent protection function. In this way, the adjustment unit can effectively suppress transient current to provide overcurrent protection function for the modular lighting device. Therefore, the reliability of the modular lighting device can be further improved to meet the needs of practical applications.

[0020] (5) In an embodiment of the present application, the modular lighting device further comprises an intelligent control unit. The positive terminal and the negative terminal are connected to the protection unit. The protection unit is connected to the adjustment unit. The adjustment unit is connected to the intelligent control unit. The intelligent control unit is connected to the first terminal and the second terminal. The intelligent control unit receives a lighting mode adjustment signal to adjust the lighting mode of the light source module according to the lighting mode adjustment signal. In this way, users can transmit the lighting mode adjustment signal through electronic devices (such as smartphones, tablet computers, notebook computers, etc.) to adjust the brightness and / or color temperature of the light source module. Therefore, the modular lighting device is more convenient to use, and can meet the needs of different users.

[0021] (6) In an embodiment of the present application, the plurality of functional modules and functional units of the modular lighting device are designed in a modular manner, so that one power supply module can be connected to multiple light source modules. In addition, the power supply module of the modular lighting device can achieve power systemization. Therefore, the installation cost of the modular lighting device can be greatly reduced to meet the needs of different applications.

[0022] (7) In an embodiment of the present application, the modular lighting device has an intelligent control unit to realize various intelligent control functions. In this way, the modular lighting device can be applied to existing various intelligent systems (such as smart home systems, smart parking lot systems, etc.). Therefore, the application of the modular lighting device can be more widely used, and can meet the trend of future development. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 4 is a block diagram of the circuit structure of a modular lighting device with high conversion efficiency according to the first embodiment of the present invention.

[0024] Figure 2 This is a circuit diagram of a light source module of a modular lighting device with high conversion efficiency according to a first embodiment of the present invention.

[0025] Figure 3 This is a circuit diagram of a light source module of a modular lighting device with high conversion efficiency according to a second embodiment of the present invention.

[0026] Figure 4 FIG. 4 is a block diagram of the circuit structure of a modular lighting device with high conversion efficiency according to a third embodiment of the present invention.

[0027] Figure 5 FIG. 4 is a block diagram of the circuit structure of a modular lighting device with high conversion efficiency according to a fourth embodiment of the present invention.

[0028] Figure 6 FIG. 4 is a block diagram of the circuit structure of a modular lighting device with high conversion efficiency according to a fifth embodiment of the present invention.

[0029] Figure 7 FIG. 4 is a circuit diagram of a modular lighting device with high conversion efficiency according to a sixth embodiment of the present invention.

[0030] Figure 8 FIG. 4 is a circuit diagram of a modular lighting device with high conversion efficiency according to a seventh embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1-modular lighting device; 11-power supply module; 111-input unit; 112-protection unit; 113-adjustment unit; 114-intelligent control unit; 12-light source module; 121-constant current control unit; LD-light source; X1-first terminal; Y1-second terminal; S1-drive switch; S2-control switch; Q3-third switch; R1-first resistor; R2-second resistor; R3-third resistor; R4-fourth resistor; Z1-Zener diode; J1-transient voltage suppression diode; PN-power supply node; N1-first node; N2-second node; E+-positive terminal; E--negative terminal; Rp-protection resistor; Ca-adjustment capacitor; GND-grounding point.

[0033] The objectives, features and advantages of the present application will become apparent from the following detailed description of the application in conjunction with the accompanying drawings, it being understood that both the foregoing information and the following detailed description are merely illustrative of the present application and they are intended to provide an appreciation of principles and concepts of the present application and to be employed to enable any person skilled in the art to make and use the application. From the disclosure of the present specification, claims, and drawings, any person skilled in the art can understand the objects and other advantages of the present application. DETAILED DESCRIPTION

[0034] Embodiments of the high conversion efficiency modular lighting device according to the present application will be described hereinafter with reference to the drawings. In the drawings, the size and the proportion of each component in the drawings can be exaggerated or reduced for the purpose of clarity and convenience in the description of the drawings. In the following description and / or claims, when referring to a component "connected" or "coupled" to another component, it can be directly connected or coupled to the other component or there can be intervening components; and when referring to a component "directly connected" or "directly coupled" to another component, there are no intervening components for describing the relationship between the components or layers. For the purpose of convenience, the same components in the following embodiments are described with the same reference numerals.

[0035] Referring to Figure 1 which is a block diagram of the circuit structure of the high conversion efficiency modular lighting device according to the first embodiment of the present application. As shown in the figure, the modular lighting device 1 includes a power supply module 11 and a light source module 12. The power supply module 11 includes an input unit 111 having a positive terminal E+ and a negative terminal E-, and the input unit 111 is connected to a constant voltage power supply. The power supply module 11 is connected to the light source module 12. In an embodiment, the constant voltage power supply can be an adapter. In another embodiment, the constant voltage power supply can also be a battery or other existing power supply.

[0036] Of course, the present embodiment is only used for illustration and is not intended to limit the scope of the present application, and equivalent modifications or changes made to the high conversion efficiency modular lighting device 1 according to the present embodiment should still be included in the patent scope of the present application.

[0037] Referring to Figure 2 which is a circuit diagram of the light source module according to the first embodiment of the present application. The present embodiment illustrates one of the circuit structures of the light source module 12. As shown in the figure, the light source module 12 includes a first terminal X1, a second terminal Y1, a plurality of light sources LD, and a constant current control unit 121. In the present embodiment, the first terminal X1 is positive, and the second terminal Y1 is negative. In the present embodiment, the first terminal X1 is negative, and the second terminal Y1 is positive.

[0038] The constant current control unit 121 includes a driving switch S1, a control switch S2, a first resistor R1 and a second resistor R2. The first terminal X1 and the second terminal Y1 are connected to the power supply module 11 (the first terminal X1 and the second terminal Y1 are connected to the positive terminal E+ and the negative terminal E- of the power supply module 11, respectively) to receive input current from the power supply module 11. The plurality of light sources LD are connected in series to form a serial circuit having a power supply node PN. The power supply node PN is located between two adjacent light sources LD. One end of the serial circuit is connected to the first terminal X1. The first terminal of the driving switch S1 is connected to the first node N1, the second terminal of the driving switch S1 is connected to the other end of the serial circuit, and the third terminal of the driving switch S1 is connected to the second node N2. The first terminal of the control switch S2 is connected to the second node N2, the second terminal of the control switch S2 is connected to the first node N1, and the third terminal of the control switch S2 is connected to the second terminal Y1. The two terminals of the first resistor R1 are connected to the second node N2 and the second terminal Y1, respectively. The first node N1 is connected to the power supply node PN through the second resistor R2. In this embodiment, the driving switch S1 is a metal-oxide-semiconductor field-effect transistor (MOS). The first terminal of the driving switch S1 is the gate, the second terminal of the driving switch S1 is the drain, and the third terminal of the driving switch S1 is the source. In another embodiment, the driving switch S1 can also be a bipolar junction transistor (BJT) or other similar components. In this embodiment, the control switch S2 is a bipolar junction transistor. The first terminal of the control switch S2 is the base, the second terminal of the control switch S2 is the emitter, and the third terminal of the control switch S2 is the collector. In another embodiment, the control switch S2 can also be a metal-oxide-semiconductor field-effect transistor or other similar components. In this embodiment, the plurality of light sources LD are light-emitting diodes (LEDs). In another embodiment, the plurality of light sources LD can also be a light-emitting diode array or other existing light sources. The number of the plurality of light sources LD can be adjusted according to actual needs, and the position of the power supply node PN can also be adjusted according to actual needs to achieve the best performance.

[0039] When the light source module 12 is started, the driving switch S1 is not yet turned on, and the serial circuit formed by the plurality of light sources LD also has no current flowing through it. At this time, the voltage applied by the power supply node PN causes a voltage difference between the gate of the driving switch S1 and the ground point GND, so the driving switch S1 is turned on. The resistance value of the driving switch S1 changes with the voltage to achieve current regulation and voltage regulation. The resistance value of the second resistor R2 is designed to make the driving switch S1 continuously work in the variable resistance region. When the conditions of formula (1) and formula (2) are met, the driving switch S1 can work in the variable resistance region, formula (1) and formula (2) are as follows:

[0040] Vgs>Vth…………………(1)

[0041] Vgs<Vgs-Vth……………………(2)

[0042] Wherein, Vgs represents the gate / source voltage of the driving switch S1; Vth represents the gate threshold voltage of the driving switch S1; and Vgs represents the gate / source voltage of the driving switch S1.

[0043] When the driver switch S1 operates in the variable resistance region, the Id (drain current) of the driver switch S1 increases as the Vds of the driver switch S1 increases (Id and Vds have a linear relationship). Furthermore, if the Vgs of the driver switch S1 changes, the resistance value of the Rds (drain-source resistance) of the driver switch S1 also changes.

[0044] When no current flows through the serial circuit, control switch S2 is in the off state. When current flows through the serial circuit, the voltage across first resistor R1 gradually increases to a reference voltage (e.g., 0.5V), turning on control switch S2 and establishing the reference voltage. The resistance value of first resistor R1 is designed to ensure that the serial circuit operates continuously in a constant current state. Furthermore, the emitter current of control switch S2 is greater than zero, and the collector current of control switch S2 is limited by second resistor R2, ensuring that control switch S2 operates continuously in the amplification region.

[0045] The resistance value of the first resistor R1 is shown in formula (3):

[0046] Rm1=Vsd / Cw……………………(3)

[0047] Wherein, Rm1 represents the resistance value of the first resistor R1; Vsd represents the reference voltage; and Cw represents the operating current of the serial circuit.

[0048] The resistance value of the second resistor R2 is shown in formula (4):

[0049] Rm2=Vdiodes-Vg-Vbe / It......(4)

[0050] Wherein, Rm2 represents the resistance value of the second resistor R2; Vdiodes represents the series voltage of the four light sources LD (in this embodiment, the power supply node PN is set between two light source groups, one of which includes two light sources LD and the other includes four light sources LD); Vg represents the gate voltage of the driving switch S1; Vbe represents the base / emitter voltage of the control switch S2; It represents the current required to maintain the control switch S2 operating in the amplification region.

[0051] By the above-mentioned circuit design and operation mechanism, the light source module 12 can form a serial circuit with the power supply node PN, and supply power to the driving switch S1 of the constant current control unit 121 through the power supply node PN. In this way, the constant current control unit 121 does not need to be powered by a constant voltage power supply or an operating voltage source, and does not need a voltage stabilizing tube and a voltage dividing resistor, which can greatly reduce power loss. Therefore, the conversion efficiency of the constant current control unit 121 can be greatly improved, and the light efficiency of the modular lighting device 1 is also greatly improved.

[0052] Of course, the present embodiment is only used for illustration and not limit the scope of the present application, equivalent modifications or changes made according to the high conversion efficiency of the modular lighting device 1 of the present embodiment should still be included in the patent scope of the present application.

[0053] Please refer to Figure 3 , which is a circuit diagram of a light source module of a high conversion efficiency of a modular lighting device of a second embodiment of the present application. The present embodiment illustrates another circuit structure of the light source module 12. As shown in the figure, the light source module 12 includes a first terminal X1, a second terminal Y1, a plurality of light sources LD and a constant current control unit 121. The constant current control unit 121 includes a driving switch S1, a control switch S2, a first resistor R1 and a second resistor R2.

[0054] The above-mentioned components are the same as the previous embodiment, and therefore will not be described here. Different from the previous embodiment, the constant current control unit 121 of the present embodiment further includes a Zener diode Z1. The two ends of the Zener diode Z1 are respectively connected with the power supply node PN and the second terminal Y1.

[0055] Similarly, by the above-mentioned circuit design, the light source module 12 can form a serial circuit with the power supply node PN, and supply power to the driving switch S1 of the constant current control unit 121 through the power supply node PN. In this way, the constant current control unit 121 does not need to be powered by a constant voltage power supply or an operating voltage source, and does not need a voltage stabilizing tube and a voltage dividing resistor, which can greatly reduce power loss. Therefore, the conversion efficiency of the constant current control unit 121 can be greatly improved, and the light efficiency of the modular lighting device 1 is also greatly improved.

[0056] Of course, the present embodiment is only used for illustration and not limit the scope of the present application, equivalent modifications or changes made according to the high conversion efficiency of the modular lighting device 1 of the present embodiment should still be included in the patent scope of the present application.

[0057] Please refer to Figure 4 , which is a block diagram of a circuit structure of a high conversion efficiency of a modular lighting device of a third embodiment of the present application, and please refer to Figure 1 or Figure 2As shown in the figure, the modular lighting device 1 comprises a power supply module 11 and a light source module 12. The power supply module 11 comprises an input unit 111 having a positive terminal E+ and a negative terminal E-.

[0058] The above components are the same as those in the previous embodiments, and thus will not be described again. Different from the previous embodiments, the power supply module 11 of the present embodiment further comprises a protection unit 112. The positive terminal E+ and the negative terminal E- of the power supply module 11 are connected to the first terminal X1 and the second terminal Y1 of the light source module 12, respectively, through the protection unit 112. The protection unit 112 can comprise a transient voltage suppression diode J1 to provide an overvoltage protection function.

[0059] As can be seen from the above, the protection unit 112 can effectively suppress transient voltage to provide an overvoltage protection function for the modular lighting device 1. Therefore, the reliability of the modular lighting device 1 can be greatly improved to meet the requirements in actual applications.

[0060] Of course, the present embodiment is only used for illustration and does not limit the scope of the present application. Equivalent modifications or changes made to the high conversion efficiency modular lighting device 1 according to the present embodiment should still be included in the patent scope of the present application.

[0061] Please refer to Figure 5 , which is a block diagram of the circuit structure of the high conversion efficiency modular lighting device of the fourth embodiment of the present application, and please refer to Figure 1 or Figure 2 . As shown in the figure, the modular lighting device 1 comprises a power supply module 11 and a light source module 12. The power supply module 11 comprises an input unit 111 having a positive terminal E+ and a negative terminal E- and a protection unit 112. The input unit 111 is connected to a constant voltage power supply.

[0062] The above components are the same as those in the previous embodiments, and thus will not be described again. Different from the previous embodiments, the power supply module 11 of the present embodiment further comprises a protection unit 112. The positive terminal E+ and the negative terminal E- of the power supply module 11 are connected to the first terminal X1 and the second terminal Y1 of the light source module 12, respectively, through the protection unit 112. The protection unit 112 can comprise a transient voltage suppression diode J1 to provide an overvoltage protection function.

[0063] As can be seen from the above, the modular lighting device 1 can achieve the gradual start-up function by adjusting the capacitance Ca, so that the lighting function of the modular lighting device 1 can provide a good user experience. In addition, the adjusting unit 113 can effectively suppress the transient current to provide the overcurrent protection function for the modular lighting device 1. Therefore, the reliability of the modular lighting device 1 can be further improved to meet the needs of practical applications.

[0064] Of course, the present embodiment is only used for illustration and does not limit the scope of the present application, and equivalent modifications or changes made to the high-conversion-efficiency modular lighting device 1 according to the present embodiment should still be included in the patent scope of the present application.

[0065] Please refer to Figure 6 , which is a block diagram of the circuit structure of the high-conversion-efficiency modular lighting device of the fifth embodiment of the present application, and please refer to Figure 1 or Figure 2 at the same time. As shown in the figure, the modular lighting device 1 includes a power supply module 11 and a light source module 12. The power supply module 11 includes an input unit 111 having a positive terminal E+ and a negative terminal E-, a protection unit 112, and an adjusting unit 113. The input unit 111 is connected with a constant voltage power supply.

[0066] The above components are the same as those in the previous embodiments, and therefore will not be described here. Different from the previous embodiments, the power supply module 11 of the present embodiment further includes an intelligent control unit 114. The positive terminal E+ and the negative terminal E- of the power supply module 11 are connected with the protection unit 112. The protection unit 112 is connected with the adjusting unit 113. The adjusting unit 113 is connected with the intelligent control unit 114. The intelligent control unit 114 is connected with the first terminal X1 and the second terminal Y1 of the light source module 12.

[0067] As can be seen from the above, the user can transmit the lighting mode adjustment signal through an electronic device (such as a smart phone, a tablet computer, a notebook computer, etc.) to adjust the brightness and / or color temperature of the light source module 12. Therefore, the modular lighting device 1 is more convenient to use, and can meet the needs of different users.

[0068] In addition, the multiple functional modules and functional units of the modular lighting device 1 are designed in a modular manner, so that one power supply module 11 can be connected with multiple light source modules 12. In addition, the power supply module 11 of the modular lighting device 1 can achieve power systemization. Therefore, the installation cost of the modular lighting device 1 can be greatly reduced to meet the needs of different applications.

[0069] In addition, the modular lighting device 1 has a smart control unit 114 to implement various smart control functions. In this way, the modular lighting device 1 can be applied to various existing smart systems (such as a smart home system, a smart parking lot system, etc.). Therefore, the modular lighting device 1 can be more widely applied and can meet the trend of future development.

[0070] Of course, the present embodiment is only used for illustration and not limit the scope of the present application, equivalent modifications or changes made according to the high conversion efficiency of the modular lighting device 1 of the present embodiment should still be included in the patent scope of the present application.

[0071] It is worth mentioning that the existing down lamp mainly uses constant current power chip control, and each down lamp needs a junction box for wiring work. Therefore, the installation work of the existing down lamp needs to spend more time, which increases the installation cost. In addition, the existing down lamp mostly uses a linear chip with constant current function to supply power to the light source LD, so the working voltage of the linear chip needs to be considered in the circuit design, and there needs to be a pressure difference between the power supply and the load, which increases the power consumption and reduces the conversion efficiency. Therefore, the light efficiency of the existing down lamp is also reduced. In contrast, according to the embodiment of the present application, the modular lighting device 1 includes a power supply module 11 and a light source module 12. The power supply module 11 includes an input unit 111 having a positive terminal E+ and a negative terminal E-, and the input unit 111 is connected with a constant voltage power supply. The light source module 12 includes a first terminal X1, a second terminal Y1, a plurality of light sources LD, and a constant current control unit 121. The constant current control unit 121 includes a drive switch S1, a control switch S2, and a first resistor R1. The first terminal X1 and the second terminal Y1 are connected with the positive terminal E+ and the negative terminal E- respectively. The plurality of light sources LD are connected in series to form a serial circuit having a power supply node PN, and one end of the serial circuit is connected with the first terminal X1. The first end, the second end, and the third end of the drive switch S1 are connected with the first node N1, the other end of the serial circuit, and the second node N2 respectively. The first end, the second end, and the third end of the control switch S2 are connected with the second node N2, the first node N1, and the second terminal Y1 respectively. The two ends of the first resistor R1 are connected with the second node N2 and the second terminal Y1 respectively. The first node N1 is connected with the power supply node PN. The power supply node PN is located between two adjacent light sources LD. As can be seen from the above, the light source module 12 can form a serial circuit having a power supply node PN, and the drive switch S1 of the constant current control unit 121 is powered through the power supply node PN. In this way, the constant current control unit 121 does not need to be powered by a constant voltage power supply or an operating voltage source, and does not need a voltage stabilizing tube and a voltage dividing resistor, which can greatly reduce power loss. Therefore, the conversion efficiency of the constant current control unit 121 can be greatly improved, and the light efficiency of the modular lighting device 1 is also greatly improved.

[0072] According to an embodiment of the present application, the power supply module 11 further comprises a protection unit 112. The positive terminal E+ and the negative terminal E- are connected to the first terminal X1 and the second terminal Y1 respectively through the protection unit 112. The protection unit 112 comprises a transient voltage suppression diode J1 to provide an over-voltage protection function. In this way, the protection unit 112 can effectively suppress transient voltage to provide an over-voltage protection function for the modular lighting device 1. Therefore, the reliability of the modular lighting device 1 can be greatly improved to meet the requirements of practical applications.

[0073] In addition, according to an embodiment of the present application, the modular lighting device 1 further comprises an adjustment unit 113. The positive terminal E+ and the negative terminal E- are connected to the protection unit 112. The protection unit 112 is connected to the first terminal X1 and the second terminal Y1 through the adjustment unit 113. The adjustment unit 113 comprises an adjustment capacitor Ca to provide a brightness adjustment function. Therefore, the modular lighting device 1 can achieve a gradual brightness start function through the adjustment capacitor Ca, so that the lighting function of the modular lighting device 1 can provide users with a good user experience.

[0074] Furthermore, according to an embodiment of the present application, the adjustment unit 113 of the modular lighting device 1 further comprises a protection resistor Rp to provide an over-current protection function. In this way, the adjustment unit 113 can effectively suppress transient current to provide an over-current protection function for the modular lighting device 1. Therefore, the reliability of the modular lighting device 1 can be further improved to meet the requirements of practical applications.

[0075] In addition, according to an embodiment of the present application, the modular lighting device 1 further comprises a smart control unit 114. The positive terminal E+ and the negative terminal E- are connected to the protection unit 112. The protection unit 112 is connected to the adjustment unit 113. The adjustment unit 113 is connected to the smart control unit 114. The smart control unit 114 is connected to the first terminal X1 and the second terminal Y1. The smart control unit 114 receives a lighting mode adjustment signal to adjust the lighting mode of the light source module 12 according to the lighting mode adjustment signal. In this way, the user can transmit the lighting mode adjustment signal through an electronic device (such as a smart phone, a tablet computer, a notebook computer, etc.) to adjust the brightness and / or color temperature of the light source module 12. Therefore, the modular lighting device 1 is more convenient to use, and can meet the needs of different users.

[0076] In addition, according to an embodiment of the present application, the modular lighting device 1 adopts a modular design for the plurality of functional modules and functional units, so that one power supply module 11 can be connected to a plurality of light source modules 12. In addition, the power supply module 11 of the modular lighting device 1 can achieve power systemization. Therefore, the installation cost of the modular lighting device 1 can be greatly reduced to meet the requirements of different applications.

[0077] Furthermore, according to the embodiment of the present application, the modular lighting device 1 has the intelligent control unit 114 to realize various intelligent control functions. In this way, the modular lighting device 1 can be applied to various existing intelligent systems (such as intelligent home system, intelligent parking lot system, etc.). Therefore, the application of the modular lighting device 1 can be more extensive, and can meet the trend of future development. As described above, the high conversion efficiency modular lighting device 1 according to the embodiment of the present application can indeed achieve excellent technical effects.

[0078] Please refer to Figure 7 which is a circuit diagram of the high conversion efficiency modular lighting device of the sixth embodiment of the present application. The present embodiment illustrates one of the circuit structures of the modular lighting device 1. As shown in the figure, the modular lighting device 1 includes the power supply module 11 and the light source module 12. The power supply module 11 includes the input unit 111 having the positive terminal E+ and the negative terminal E-, and the input unit 111 is connected with the constant voltage power supply.

[0079] The light source module 12 includes the first terminal X1, the second terminal Y1, a plurality of light sources LD and the constant current control unit 121. The circuit structure of the light source module 12 is the same as that of the first embodiment, and therefore will not be described here.

[0080] The input unit 111 is connected with the protection unit 112. The protection unit 112 includes the transient voltage suppression diode J1. The two ends of the transient voltage suppression diode J1 are respectively connected with the positive terminal E+ and the negative terminal E- of the input unit 111. The protection unit 112 can effectively suppress the transient voltage to provide the overvoltage protection function for the modular lighting device 1. Therefore, the reliability of the modular lighting device 1 can be greatly improved to meet the requirements of practical applications.

[0081] The adjustment unit 113 is connected with the protection unit 112. The adjustment unit 113 includes the third resistor R3, the fourth resistor R4, the protection resistor Rp, the adjustment capacitor Ca and the third switch Q3 (GND represents the ground point). The capacitance value of the adjustment capacitor Ca is related to the brightness adjustment function, and the user can design the capacitance value of the adjustment capacitor Ca to achieve the gradual brightness start function. The resistance value of the protection resistor Rp is related to the overcurrent protection function, and the user can design the resistance value of the protection resistor Rp to achieve the overcurrent protection function. The modular lighting device 1 can achieve the gradual brightness start function through the adjustment capacitor Ca, so that the lighting function of the modular lighting device 1 can provide the user with a good use experience. In addition, the adjustment unit 113 can effectively suppress the transient current to provide the overcurrent protection function for the modular lighting device 1. Therefore, the reliability of the modular lighting device 1 can be further improved to meet the requirements of practical applications.

[0082] The intelligent control unit 114 is connected to the adjustment unit 113 and to the first terminal X1 and the second terminal Y1 of the light source module 12. The intelligent control unit 114 can include a control circuit and a communication circuit. The control circuit can be a microcontroller (MCU), a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other similar components. The communication circuit can be a WiFi module, a Bluetooth module, a ZigBee module, or other similar components. A user can transmit a lighting mode adjustment signal through an electronic device (such as a smartphone, a tablet computer, a notebook computer, etc.) to adjust the brightness and / or the color temperature of the light source module 12. Therefore, the modular lighting device 1 is more convenient to use and can meet the needs of different users. The modular lighting device 1 can be applied to existing various intelligent systems (such as a smart home system, a smart parking lot system, etc.). Therefore, the modular lighting device 1 can be more widely applied and can meet the trend of future development.

[0083] Similarly, the light source module 12 can form a serial circuit with the power supply node PN and supply power to the driving switch S1 of the constant current control unit 121 through the power supply node PN. In this way, the constant current control unit 121 does not need to be powered by a constant voltage power supply or an operating voltage source, and does not need a voltage stabilizing tube and a voltage dividing resistor, which can greatly reduce power loss. Therefore, the conversion efficiency of the constant current control unit 121 can be greatly improved, and the light efficiency of the modular lighting device 1 is also greatly improved.

[0084] Of course, the present embodiment is only used for illustration and does not limit the scope of the present application. Equivalent modifications or changes made to the high-conversion-efficiency modular lighting device 1 according to the present embodiment should still be included in the patent scope of the present application.

[0085] Please refer to Figure 8 which is a circuit diagram of a high-conversion-efficiency modular lighting device of a seventh embodiment of the present application. The present embodiment illustrates another circuit structure of the modular lighting device 1. As shown in the figure, unlike the previous embodiments, the modular lighting device 1 has a plurality of light source modules 12. These light source modules 12 share a first terminal X1.

[0086] As described above, the plurality of functional modules and functional units of the modular lighting device 1 are designed in a modular manner, so that one power supply module 11 can be connected to a plurality of light source modules 12. In addition, the power supply module 11 of the modular lighting device 1 can achieve power systemization. Therefore, the installation cost of the modular lighting device 1 can be greatly reduced to meet the needs of different applications.

[0087] Similarly, the light source module 12 can form a serial circuit having the power supply node PN, and supply power to the driving switch S1 of the constant current control unit 121 through the power supply node PN. In this way, the constant current control unit 121 does not need to be supplied by a constant voltage power supply or an operating voltage source, and does not need a voltage stabilizing tube and a voltage dividing resistor, which can greatly reduce power loss. Therefore, the conversion efficiency of the constant current control unit 121 can be greatly improved, and the light efficiency of the modular lighting device 1 is also greatly improved.

[0088] Of course, the present embodiment is only used for illustration and not limit the scope of the present application, and equivalent modifications or changes made according to the high conversion efficiency of the modular lighting device 1 of the present embodiment should still be included in the patent scope of the present application.

[0089] In summary, according to the embodiment of the present application, the modular lighting device 1 includes a power supply module 11 and a light source module 12. The power supply module 11 includes an input unit 111 having a positive terminal E+ and a negative terminal E-, and the input unit 111 is connected with a constant voltage power supply. The light source module 12 includes a first terminal X1, a second terminal Y1, a plurality of light sources LD, and a constant current control unit 121. The constant current control unit 121 includes a driving switch S1, a control switch S2, and a first resistor R1. Wherein, the first terminal X1 and the second terminal Y1 are connected with the positive terminal E+ and the negative terminal E- respectively. The plurality of light sources LD are connected in series to form a serial circuit having a power supply node PN, and one end of the serial circuit is connected with the first terminal X1. The first end, the second end and the third end of the driving switch S1 are connected with the first node N1, the other end of the serial circuit and the second node N2 respectively. The first end, the second end and the third end of the control switch S2 are connected with the second node N2, the first node N1 and the second terminal Y1 respectively. The two ends of the first resistor R1 are connected with the second node N2 and the second terminal Y1 respectively. The first node N1 is connected with the power supply node PN. The power supply node PN is located between two adjacent light sources LD. As can be seen from the above, the light source module 12 can form a serial circuit having the power supply node PN, and supply power to the driving switch S1 of the constant current control unit 121 through the power supply node PN. In this way, the constant current control unit 121 does not need to be supplied by a constant voltage power supply or an operating voltage source, and does not need a voltage stabilizing tube and a voltage dividing resistor, which can greatly reduce power loss. Therefore, the conversion efficiency of the constant current control unit 121 can be greatly improved, and the light efficiency of the modular lighting device 1 is also greatly improved.

[0090] According to an embodiment of the present application, the power supply module 11 further comprises a protection unit 112. The positive terminal E+ and the negative terminal E- are connected with the first terminal X1 and the second terminal Y1 through the protection unit 112. The protection unit 112 comprises a transient voltage suppression diode J1 to provide an over-voltage protection function. In this way, the protection unit 112 can effectively suppress transient voltage to provide an over-voltage protection function for the modular lighting device 1. Therefore, the reliability of the modular lighting device 1 can be greatly improved to meet the requirements of practical applications.

[0091] In addition, according to an embodiment of the present application, the modular lighting device 1 further comprises an adjustment unit 113. The positive terminal E+ and the negative terminal E- are connected with the protection unit 112, and the protection unit 112 is connected with the first terminal X1 and the second terminal Y1 through the adjustment unit 113. The adjustment unit 113 comprises an adjustment capacitor Ca to provide a brightness adjustment function. Therefore, the modular lighting device 1 can achieve a gradual brightness start function through the adjustment capacitor Ca, so that the lighting function of the modular lighting device 1 can provide users with a good user experience.

[0092] Furthermore, according to an embodiment of the present application, the adjustment unit 113 of the modular lighting device 1 further comprises a protection resistor Rp to provide an over-current protection function. In this way, the adjustment unit 113 can effectively suppress transient current to provide an over-current protection function for the modular lighting device 1. Therefore, the reliability of the modular lighting device 1 can be further improved to meet the requirements of practical applications.

[0093] In addition, according to an embodiment of the present application, the modular lighting device 1 further comprises a smart control unit 114. The positive terminal E+ and the negative terminal E- are connected with the protection unit 112. The protection unit 112 is connected with the adjustment unit 113. The adjustment unit 113 is connected with the smart control unit 114. The smart control unit 114 is connected with the first terminal X1 and the second terminal Y1. The smart control unit 114 receives a lighting mode adjustment signal to adjust the lighting mode of the light source module 12 according to the lighting mode adjustment signal. In this way, the user can transmit the lighting mode adjustment signal through an electronic device (such as a smart phone, a tablet computer, a notebook computer, etc.) to adjust the brightness and / or color temperature of the light source module 12. Therefore, the modular lighting device 1 is more convenient to use, and can meet the needs of different users.

[0094] In addition, according to an embodiment of the present application, the modular lighting device 1 adopts a modular design for the plurality of functional modules and functional units, so that one power supply module 11 can be connected with a plurality of light source modules 12. In addition, the power supply module 11 of the modular lighting device 1 can achieve a power system. Therefore, the installation cost of the modular lighting device 1 can be greatly reduced to meet the requirements of different applications.

[0095] Furthermore, according to the embodiments of the present application, the modular lighting device 1 has a smart control unit 114 to realize various smart control functions. In this way, the modular lighting device 1 can be applied to various existing smart systems (such as smart home systems, smart parking lot systems, etc.). Therefore, the modular lighting device 1 can be more widely applied and can meet the future development trend.

[0096] It should be noted that although the above embodiments have been described herein, the patent protection scope of the present application is not limited thereby. Therefore, based on the innovative idea of the present application, changes and modifications to the embodiments described herein, or equivalent structures or equivalent process transformations made using the content of the present application specification and drawings, direct or indirect application of the above technical solutions to other related technical fields, are all included in the protection scope of the present application patent.

Claims

1. A modular lighting device with high conversion efficiency, characterized in that: include: a power supply module, comprising an input unit having a positive terminal and a negative terminal, wherein the input unit is connected to a constant voltage power supply; as well as A light source module includes a first terminal, a second terminal, a plurality of light sources, and a constant current control unit, wherein the constant current control unit includes a driving switch, a control switch, a first resistor, and a second resistor; In which, the first terminal and the second terminal are respectively connected to the positive terminal and the negative terminal, the multiple light sources are connected in series to form a serial circuit with a power supply node, one end of the serial circuit is connected to the first terminal, the first end, the second end and the third end of the driving switch are respectively connected to the first node, the other end of the serial circuit and the second node, the first end, the second end and the third end of the control switch are respectively connected to the second node, the first node and the second terminal, the two ends of the first resistor are respectively connected to the second node and the second terminal, and the first node is connected to the power supply node through the second resistor.

2. The modular lighting device with high conversion efficiency according to claim 1, wherein: The power supply node is located between two adjacent light sources.

3. The modular lighting device with high conversion efficiency according to claim 1, wherein: The power supply module further includes a protection unit, and the positive terminal and the negative terminal are connected to the first terminal and the second terminal respectively through the protection unit.

4. The modular lighting device with high conversion efficiency according to claim 3, wherein: The protection unit includes a transient voltage suppressor diode to provide an overvoltage protection function.

5. The modular lighting device with high conversion efficiency according to claim 3, wherein: The power supply module further includes an adjustment unit, the positive terminal and the negative terminal are connected to the protection unit, and the protection unit is connected to the first terminal and the second terminal through the adjustment unit.

6. The modular lighting device with high conversion efficiency according to claim 5, wherein: The adjustment unit includes an adjustment capacitor to provide a brightness adjustment function.

7. The modular lighting device with high conversion efficiency according to claim 6, wherein: The adjustment unit further includes a protection resistor to provide an overcurrent protection function.

8. The modular lighting device with high conversion efficiency according to claim 5, wherein: The power supply module also includes an intelligent control unit, the positive terminal and the negative terminal are connected to the protection unit, the protection unit is connected to the adjustment unit, the adjustment unit is connected to the intelligent control unit, and the intelligent control unit is connected to the first terminal and the second terminal.

9. The modular lighting device with high conversion efficiency according to claim 8, wherein: The device further comprises an intelligent control unit for receiving a lighting mode adjustment signal to adjust the lighting mode of the light source module according to the lighting mode adjustment signal.

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