CN215991291U - Current divider, power supply device and lighting system - Google Patents
Current divider, power supply device and lighting system Download PDFInfo
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- CN215991291U CN215991291U CN202122053456.2U CN202122053456U CN215991291U CN 215991291 U CN215991291 U CN 215991291U CN 202122053456 U CN202122053456 U CN 202122053456U CN 215991291 U CN215991291 U CN 215991291U
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Abstract
The embodiment of the application provides a shunt, power equipment and lighting system relates to lighting control technical field, the shunt is used for being connected with power module's power end, power module's power end and light-emitting component are connected, the shunt includes the shunt body, the shunt body is used for right power module's output current shunts, the electric current of shunt body reposition of redundant personnel is constant current, and is greater than power module's output current is the required electric current of linear variation. The power supply module is shunted by the shunt, so that the output current of the power supply module can keep linear change, the current of the light-emitting component under the low-brightness condition can also keep linear change, and the dimming function of the light-emitting component is more stable.
Description
Technical Field
The application relates to the technical field of lighting control, in particular to a current divider, power supply equipment and a light-emitting system.
Background
In the field of lighting, a dimming device is generally used to adjust the brightness of light to meet the personalized needs of users or to dim light according to environmental needs to reduce energy consumption. The dimming device can adopt a mode of analog dimming, the dimming device using the analog dimming can adjust the current of the light-emitting component by directly adjusting the output current of the power supply module, but because the device parameters, the reference voltage and the like of the power supply module supplying power to the light-emitting component are easy to deviate under the condition of low current, the current of the light-emitting component is in nonlinear change under the condition of low brightness, and even the light-emitting component is easy to directly turn off in severe cases.
SUMMERY OF THE UTILITY MODEL
The present application is directed to a current divider, a power supply device and a lighting system to solve the above problems. The present application achieves the above object by the following technical solutions.
In a first aspect, an embodiment of the present application provides a shunt, the shunt is used for being connected with power supply end of power module, power module's power end is connected with light emitting component, the shunt includes a shunt body, the shunt body is used for right power module's output current shunts, the electric current that the shunt body shunts is constant current, and is greater than power module's output current is the required electric current of linear variation.
In a second aspect, an embodiment of the present application provides a power supply apparatus, where the power supply apparatus includes a power supply module and the above shunt, a power end of the power supply module is used to connect with the light emitting component, and a shunt body of the shunt is connected with the power end of the power supply module.
In a third aspect, an embodiment of the present application provides a lighting system, which includes a power supply module, a lighting assembly, and the above shunt, where a shunt body of the shunt is disposed between a path where the power supply module is connected to the lighting assembly.
The embodiment of the application provides a shunt, power equipment and lighting system, the shunt is used for being connected with power module's power end, power module's power end and light-emitting component are connected, the shunt includes the shunt body, the shunt body is used for right power module's output current shunts, the electric current of shunt body reposition of redundant personnel is constant current, and is greater than power module's output current is the required electric current of linear variation. The power supply module is shunted by the shunt, so that the output current of the power supply module can keep linear change, the current of the light-emitting component under the low-brightness condition can also keep linear change, and the dimming function of the light-emitting component is more stable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 illustrates an output current diagram of a power supply module according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a usage scenario provided by an embodiment of the present application;
fig. 3 shows a block diagram of a splitter according to another embodiment of the present application;
FIG. 4 is a schematic view illustrating the connection of another shunt according to another embodiment of the present application;
fig. 5 shows a schematic connection diagram of a splitter according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the field of lighting, dimming devices are generally used to adjust the brightness of the light to meet the individual needs of users or adjust the brightness of the light according to the environmental needs to reduce energy consumption. In the existing dimming technology, the brightness of the light can be adjusted by controlling the current of the light emitting assembly, and there are two main ways of adjusting the light by controlling the current of the light emitting assembly: PWM dimming and analog dimming. If the analog dimming mode is adopted, the dimming device can adjust the light brightness of the light-emitting component by adjusting the output current of the power supply module for supplying power to the light-emitting component. However, since device parameters, reference voltages, and the like of a power supply module for supplying power to the light emitting device are easily deviated under a low current condition, the current of the light emitting device changes in a non-linear manner under a low luminance condition, and even the light emitting device is easily turned off directly in a severe condition.
When the power supply module supplies power for the light-emitting component alone, the current of the light-emitting component is equal to the output current of the power supply module, and the current of the light-emitting component is in positive correlation with the light brightness of the light-emitting component. For example, the larger the output current of the power supply module is, the larger the current of the light emitting assembly is, and the higher the light brightness of the light emitting assembly is. The mode of using the simulation to adjust luminance, when light of light emitting component is bright, the output current of the power supply module that needs is great, and the user can freely adjust the light luminance in a great range according to the demand of oneself. However, when the light of the light emitting component is dark, the required output current of the power supply module is small, and since the device parameters and the reference voltage of the power supply module are easy to shift under the condition of low current, the power supply module cannot ensure that the output current linearly changes when the output current is low, and the instability of the output current can also cause the current of the light emitting component to nonlinearly change, so that the light of the light emitting component can flicker, and the light emitting component can be damaged in severe cases. The power supply module can be a constant current power supply, and a power supply management chip or a discrete circuit is used for realizing the constant current function. As shown in fig. 1, which illustrates an output current schematic diagram of a power supply module according to an embodiment of the present application, a relationship curve in fig. 1 may represent a variation relationship between an output current and a driving voltage of the power supply module, where a current corresponding to a point a is a minimum current at which the output current of the power supply module linearly varies, and when the driving voltage of the power supply module is smaller than a voltage value corresponding to the point a, the output current of the power supply module nonlinearly varies, and it cannot be ensured that the output current linearly varies with the driving voltage.
In order to solve the above problem, the present application provides a current divider, a power supply device and a lighting system, through mutual cooperation of each module, the current of the power supply module can be divided by the current divider, so that the output current of the power supply module keeps linear change, and meanwhile, the current of the lighting assembly can also keep linear change, so that the dimming function of the lighting assembly is more stable.
Referring to fig. 2, a schematic view of a usage scenario provided by an embodiment of the present application is shown, where in the lighting scenario, the brightness of the light may be adjusted through a dimming button of a lighting system or an intelligent terminal device in an intelligent home. Taking an intelligent home as an example, the intelligent terminal device can communicate with the light emitting component through a wired or wireless network, the user can adjust the light brightness of the light emitting component by sliding the brightness bar on the light adjustment page of the intelligent terminal device, the intelligent terminal device can send a control instruction to the gateway device of the intelligent home after receiving the sliding adjustment instruction of the user, the gateway device can control the output current of the power supply module connected with the light emitting component, and the light brightness of the light emitting component is adjusted by controlling the magnitude of the output current.
As shown in fig. 3, fig. 3 schematically illustrates a flow divider provided by another embodiment of the present application, and the flow divider 300 may be used in the scenario shown in fig. 2. The shunt 300 is connected to a power end of the power supply module 400, and the power end of the power supply module 400 is further connected to the light emitting element 500. The current divider 300 includes a current divider body 310, where the current divider body 310 is used for dividing the output current of the power supply module 400, and the current divided by the current divider body 310 is a constant current and is greater than the current required by the output current of the power supply module 400 to change linearly.
The shunt body 310 shunts the output current of the power supply module 400, and in some exemplary embodiments, the shunt 300 and the light emitting assembly 500 may be connected in parallel to a power source terminal of the power supply module 400. In an embodiment of the present application, the output current of the power supply module 400 may be equal to the sum of the current of the shunt body 310 and the current of the light emitting assembly 500. In the embodiment of the present application, the current shunted by the shunt body 310 is a constant current and is greater than the current required for the output current of the power supply module 400 to keep changing linearly, so that the output current of the power supply module 400 keeps changing linearly no matter how low the current of the light emitting assembly is, and correspondingly, the current of the light emitting assembly 500 also keeps changing stably. Referring to fig. 1 again, if the current divider 300 in the embodiment of the present application is used to divide the output current of the power supply module 400, and if the current divided by the current divider body 310 is greater than the current corresponding to the point a, the output current of the power supply module 400 is also greater than the current corresponding to the point a, which can ensure that the output current of the power supply module 400 linearly changes, so that the current of the light emitting assembly 500 can still be stably linearly changed when being smaller, thereby ensuring the stability of brightness adjustment under the condition of low brightness of the light. For example, if the current at point a is 10mA, the current shunted by the shunt body 310 may be maintained at a value greater than 10mA, for example, may be 12mA, and so on. It should be noted that the power source terminal of the power supply module 400 can be connected to one or more light emitting assemblies 500, which is not limited by the embodiment of the present application. The light emitting assembly 500 may be, for example, an LED lamp.
In other embodiments of the present application, the power source terminal of the power supply module 400 may further be connected to other circuit elements, and therefore, the output current of the power supply module 400 may be greater than or equal to the sum of the current of the shunt body 310 and the current of the light emitting assembly 500, and it can be understood that, since the current shunted by the shunt body 310 is a constant current and greater than the current required by the output current of the power supply module 400 to keep changing linearly, in this embodiment, by shunting the output current of the power supply module 400 by using the shunt 300, it can still be ensured that the output current of the power supply module 400 is greater than the current required by the output current of the power supply module 400 to keep changing linearly, and the output current of the power supply module 400 changes linearly.
It should be noted that the current required for maintaining the output current of the power supply module 400 to vary linearly can be obtained according to the actual circuit elements used by the power supply module 400 and the characteristics of the light emitting assembly 500. For example, the power supply module 400 may be connected to two ends of the light emitting module 500, and the output current of the power supply module 400 may be adjusted from large to small, and the brightness change condition of the light emitting module 500 is observed at the same time, if the brightness of the light emitting module 500 starts to flicker, the output current of the power supply module 400 at this time may be recorded, and finally, the output current of the power supply module 400 when the brightness of the light emitting module 500 starts to flicker may be used as the current required by the output current of the power supply module 400 to keep changing linearly, that is, the current corresponding to point a in fig. 1.
To sum up, this application embodiment provides a shunt, the shunt is used for being connected with power module's power end, power module's power end and light emitting component are connected, the shunt includes the shunt body, the shunt body is used for right power module's output current shunts, the electric current of shunt body reposition of redundant personnel is constant current, and is greater than power module's output current and keeps the required electric current of linear variation. The current divider is used for dividing current, so that the output current of the power supply module can keep linear change, the current of the light-emitting component under the low-brightness condition can also keep linear change, and the dimming function of the light-emitting component is more stable.
In some embodiments of the present application, the diverter of the diverter 300The body 310 includes a constant current component for connecting with a power terminal of the power supply module 400. In a constant current mode of the constant current component, the current of the constant current component is kept within a specified current value range. Illustratively, to ensure that the current shunted by the shunt body 310 is greater than the current required by the output current of the power supply module 400 to maintain linear variation, the current of the constant current component in the constant current mode should also be maintained greater than the current required by the output current of the power supply module 400 to maintain linear variation. For example, if the minimum current required for the power supply module 400 to maintain a linear change is IAThen the current I of the constant current component in the constant current modecShould also remain a value greater than IAAny current magnitude of (1). It will be appreciated that since the output current of the power supply module 400 is limited by the performance parameters of the power supply module 400 itself, the output current generally has a maximum current value IoTherefore, the current I of the constant current component in the constant current mode can be further adjustedcIs limited toATo IoIn the meantime.
Further, the constant current component may be connected in parallel with the power supply module 400, wherein an input end of the constant current component is connected to a power end of the power supply module 400, and an output end of the constant current component is connected to an input end of the power supply module 400.
Still further, the constant current component may further include a control terminal for controlling on or off between an input terminal of the constant current component and an output terminal of the constant current component based on a specified level. As shown in fig. 4, the control terminal adjusts the designated level to enable conduction between the input terminal and the output terminal of the constant current component 320, so that the constant current component 320 can be in the constant current mode, the current of the constant current component 320 in the constant current mode is kept to be larger than the current value required by the power supply module 400 to keep linear variation, the current divider body 310 can divide the output current of the power supply module 400, and the current of the light emitting component 500 also keeps linear variation. The input end and the output end of the constant current component 320 can be cut off by adjusting the designated level through the control end, when the constant current component 320 is used, the current of the constant current component 320 is 0, which is equivalent to the disconnection between the constant current component 320 and the power supply module 400, and the constant current component 320 does not shunt the output current of the power supply module 400 any more. As can be seen from the foregoing embodiments, the current offset of the power supply module 400 only exists when the brightness of the light emitting device 500 is low, which causes the problem that the power supply module 400 cannot maintain the linear change, and the current keeps the stable linear change when the brightness of the light emitting device 500 is high. Therefore, in some exemplary embodiments, when the user adjusts the brightness of the light emitting component 500 to a higher state, the control terminal can control the input terminal and the output terminal of the constant current component 320 to be turned off by adjusting the specified level, and the shunt 300 does not operate; when the user adjusts the brightness of the light emitting assembly 500 to a lower state, the control terminal can control the conduction between the input terminal and the output terminal of the constant current assembly 320 by adjusting the designated level, so that the current divider 300 divides the output current of the power supply module 400. Illustratively, the control terminal may be connected with a power terminal of the power supply module 400; the control terminal may also be connected to the input terminal of the power supply module 400, as shown in fig. 4; the control terminal may be connected to the power supply module 400 after being connected to other circuit elements, such as a resistor.
In some embodiments, the constant current component 320 may be a MOS transistor, a drain of the MOS transistor is connected to a power supply terminal of the power supply module 400, and in the constant current mode, the MOS transistor is in a saturation state. When the MOS tube is in a saturation state, if the grid-source voltage of the MOS tube is kept unchanged, the drain current of the MOS tube is also kept unchanged. The gate-source voltage of the MOS transistor can be adjusted, so that the drain current of the MOS transistor in a saturated state is kept within a specified current value range, and the output current of the power supply module 400 is further shunted.
Optionally, the shunt 300 may further include a switch assembly for connecting with the shunt body, and the switch assembly is used for adjusting the connection relationship between the shunt body 310 and the power supply module 400. For example, if the output current of the power supply module 400 is greater than a preset current value, the connection between the current divider body 310 and the power supply module 400 can be disconnected by adjusting the switch assembly, it can be understood that the preset current value should be greater than the current required by the output current of the power supply module 400 to change linearly, and thus, after the current divider body 310 is directly disconnected from the power supply module 400, the current of the light emitting assembly 500 still changes linearly; if the output current of the power supply module 400 is smaller than the preset current value, the shunt body 310 may be connected to the power supply module 400 by adjusting the switch assembly, and the shunt body 310 shunts the output current of the power supply module 400. The switching component may be implemented by a switching circuit, for example, a mechanical switching circuit, a transistor digital switching circuit, or the like.
As shown in fig. 5, the shunt 300 may further include a resistor element 340, two ends of the resistor element 340 are respectively connected to the source and the gate of the MOS transistor 330, and when in use, the gate-source voltage of the MOS transistor 330 may be adjusted by adjusting the resistance R of the resistor element 340, so that the MOS transistor 330 in the constant current mode is in a saturation state, and further, the drain current of the MOS transistor 330 is greater than the current required by the power supply module 400 to maintain linear change, thereby achieving shunting of the output current of the power supply module 400. In addition, by adjusting the resistance R of the resistor element 340, the MOS transistor 330 can be turned off, and the shunt 300 suspends the shunt when the light emitting device 500 is at a higher brightness, thereby reducing the power consumption.
It is understood that in some exemplary embodiments, the MOS transistor 330 may be an N-channel depletion MOS transistor. Illustratively, the drain current may be I in the saturation state of the MOS transistor 330d＝k(Vgs-Vgs(off))2Where k is the transconductance coefficient, VgsIs a gate-source voltage, VgsAnd (off) is the cut-off voltage of the MOS tube in the cut-off state. In FIG. 5, Vgs＝IdR, R is the resistance of the resistor element 340, and thus the drain current may be Id＝k*(Id*R+Vgs(off))2. When the grid and the source are zero-biased VgsA saturation current I can be obtained at 0Vdss＝k*Vgs(off)2. Thereby, drain current I in saturationd＝Idss*(1+Id*R/Vgs(off))2Due to saturation current IdssCut-off voltage Vgs(off) and the resistance R of the resistive element 340 is constant, so the drain current IdThe drain current I can be made constant by adjusting the resistance R of the resistive element 340dRemains greater than the current required by power module 400 to maintain the linear variation.
To sum up, the embodiment of the application provides a shunt, the shunt is used for being connected with power supply module's power end, power supply module's power end is connected with light emitting component, the shunt includes the shunt body, the shunt body includes constant current component, constant current component can include input, output and control end, the control end can be used for based on appointed level control the input of constant current component with switch on or cut off between constant current component's the output to it is right under low luminance to make the shunt the output current of power supply module shunts, makes light emitting component's current can keep linear change, and under higher luminance, the shunt suspends the reposition of redundant personnel, can also reduce the energy consumption.
Another embodiment of the present application further provides a power supply device, where the power supply device includes a power supply module and the shunt described in the above embodiment, a power end of the power supply module is used to connect with the light emitting component, and a shunt body of the shunt is connected with a power end of the power supply module. The power supply equipment shunts the output current of the power supply module through the shunt, the current shunted by the shunt body is constant current and is greater than the current required by the linear change of the power supply module, so that the current of the light-emitting component can also keep the linear change under low brightness, and the dimming function of the light-emitting component is more stable.
An embodiment of the present application further provides a lighting system, the lighting system includes a power supply module, a lighting assembly and the shunt described in the above embodiment, the power end of the power supply module is connected to the lighting assembly, and the shunt body of the shunt is disposed between the power supply module and the path connected to the lighting assembly. The light-emitting system shunts the output current of the power supply module through the shunt, the current shunted by the shunt body is constant current and is larger than the current required by the power supply module for keeping linear change, so that the current of the light-emitting component can also keep linear change under low brightness, and the dimming function of the light-emitting component is more stable.
Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The shunt is characterized in that the shunt is connected with a power end of a power supply module, the power end of the power supply module is connected with a light-emitting component, the shunt comprises a shunt body, the shunt body is used for shunting output current of the power supply module, the current shunted by the shunt body is constant current and is greater than current required by linear change of the output current of the power supply module.
2. The current divider according to claim 1, wherein the current divider body comprises a constant current component, the constant current component is configured to be connected to a power supply terminal of the power supply module, an operation mode of the constant current component comprises a constant current mode, and a current of the constant current component in the constant current mode is maintained within a specified current value range.
3. The shunt of claim 2, wherein the constant current component comprises an input terminal and an output terminal, the input terminal is configured to be connected to a power terminal of the power module, and the output terminal is configured to be connected to an input terminal of the power module.
4. The shunt of claim 3, wherein the constant current component further comprises a control terminal configured to control conduction or cutoff between the input terminal of the constant current component and the output terminal of the constant current component based on a specified level.
5. The shunt according to claim 2, wherein the constant current component is an MOS transistor, a drain of the MOS transistor is connected to a power supply terminal of the power supply module, and in the constant current mode, the MOS transistor is in a saturation state.
6. The shunt according to claim 5, further comprising a resistor element, wherein two ends of the resistor element are respectively connected to the source and the gate of the MOS transistor.
7. The shunt according to claim 5 or 6, wherein the MOS transistor is an N-channel depletion type MOS transistor.
8. The shunt of claim 1, further comprising a switch assembly, wherein the switch assembly is coupled to the shunt body, and wherein the switch assembly is configured to adjust a coupling relationship between the shunt body and the power module.
9. A power supply device, characterized in that it comprises a power supply module and a shunt according to any one of claims 1-8, the power supply module having a power end for connection to a light emitting assembly, the shunt body of the shunt being connected to the power end of the power supply module.
10. A lighting system comprising a power supply module, a lighting assembly and a shunt according to any of claims 1-8, the shunt body of the shunt being disposed between the power supply module and a path to which the lighting assembly is connected.
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| CN202122053456.2U CN215991291U (en) | 2021-08-27 | 2021-08-27 | Current divider, power supply device and lighting system |
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| CN202122053456.2U CN215991291U (en) | 2021-08-27 | 2021-08-27 | Current divider, power supply device and lighting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114650636A (en) * | 2022-05-19 | 2022-06-21 | 广东南光影视器材有限公司 | Method and circuit system for realizing ultra-low brightness dimming |
| CN117580212A (en) * | 2024-01-15 | 2024-02-20 | 杭州罗莱迪思科技股份有限公司 | Dimming lamp control method with smooth dark part |
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2021
- 2021-08-27 CN CN202122053456.2U patent/CN215991291U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114650636A (en) * | 2022-05-19 | 2022-06-21 | 广东南光影视器材有限公司 | Method and circuit system for realizing ultra-low brightness dimming |
| CN114650636B (en) * | 2022-05-19 | 2022-09-06 | 广东南光影视器材有限公司 | Method and circuit system for realizing ultra-low brightness dimming |
| CN117580212A (en) * | 2024-01-15 | 2024-02-20 | 杭州罗莱迪思科技股份有限公司 | Dimming lamp control method with smooth dark part |
| CN117580212B (en) * | 2024-01-15 | 2024-04-09 | 杭州罗莱迪思科技股份有限公司 | Dimming lamp control method with smooth dark part |
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