CN110174853B - Load working current stabilizing device and method - Google Patents
Load working current stabilizing device and method Download PDFInfo
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- CN110174853B CN110174853B CN201910508593.5A CN201910508593A CN110174853B CN 110174853 B CN110174853 B CN 110174853B CN 201910508593 A CN201910508593 A CN 201910508593A CN 110174853 B CN110174853 B CN 110174853B
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
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- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The application relates to a load working current stabilizing device and a method, which belong to the technical field of electronics, and the device comprises: the load control circuit comprises a current source, a load control component, an original load and a built-in load; the original load and the built-in load are respectively connected with the output end of the current source through the load control component; the load control component is used for controlling connection or disconnection of the original load and the current source and controlling connection or disconnection of the built-in load and the current source; wherein the current-voltage characteristic of the built-in load matches the current-voltage characteristic of the original load; the problem that the working current of the original load is unstable due to the fact that the level of the output end of the current source jumps when the original load is switched in state and the current control assembly controls the current supplied by the current source to the outside is influenced can be solved; the effect of stabilizing the working current of the original load can be achieved.
Description
Technical Field
The application relates to a device and a method for stabilizing load working current, belonging to the technical field of electronics.
Background
The LED display screen is more and more widely applied at present. The circuit structure of the LED display screen comprises a current source, an LED load connected with the current source, a load control component (such as a switch) used for controlling the connection or disconnection of the LED load and the current source, and a current control component used for controlling the current output by each current source to be consistent.
In the above circuit configuration, the current source supplies an operating current to the LED load. When the state of the LED load is switched with the current source (for example, the LED load is switched from a connected state to a disconnected state or from the disconnected state to the connected state), the jump of the level of the output end of the current source can interfere with the current control assembly, and at the moment, the current control assembly controls the working current provided by the current source to have an establishment process from instability to stability, so that the display effect of the LED display screen is influenced.
Disclosure of Invention
The application provides a load working current stabilizing device and method, which can solve the problem that when an original load is switched in a state, the level of a current source output end jumps to influence the current provided by a current control assembly control current source to the outside, so that the working current of the original load is unstable. The application provides the following technical scheme:
in a first aspect, there is provided a device for stabilizing a load operating current, the device comprising: the load control circuit comprises a current source, a load control component, an original load and a built-in load;
the current source is used for providing working current for the original load;
the original load and the built-in load are respectively connected with the output end of the current source through the load control component; the load control component is used for controlling connection or disconnection of the original load and the current source and controlling connection or disconnection of the built-in load and the current source;
wherein the current-voltage characteristic of the built-in load matches the current-voltage characteristic of the original load.
Optionally, the load control assembly is configured to:
controlling the built-in load to be communicated with the current source before the original load is switched from a rest state to a working state;
when the original load is switched from a rest state to a working state, controlling the built-in load to be disconnected from the current source;
controlling the built-in load to be communicated with the current source when the original load is switched from a working state to a rest state.
Optionally, the load control assembly is configured to:
controlling the built-in load to be communicated with the current source for a first preset time before the original load is switched from a rest state to a working state;
wherein the first preset time period is determined based on a time period from a time when the built-in load is connected with the current source to a time when a current flowing through the built-in load is stabilized, when the original load is disconnected from the current source.
Optionally, the load control assembly is configured to:
controlling the built-in load to be disconnected from the current source for a second preset duration after the original load is switched from the working state to the rest state;
the second preset time period is determined based on a time period from when the original load is disconnected from the current source to when the current flowing through the original load is less than or equal to a preset threshold when the original load is connected with the current source and the current flowing through the original load is stable.
Optionally, the primary load comprises an LED display unit.
Optionally, the device further comprises a current control component connected to an output of the current source;
the current control component is used for controlling the current output by the connected current source to be consistent.
In a second aspect, there is provided a method for stabilizing a load working current, which is used in the stabilizing device for a load working current provided in the first aspect, and the method includes:
controlling the built-in load to be communicated with the current source before the original load is switched from a rest state to a working state;
when the original load is switched from a rest state to a working state, controlling the built-in load to be disconnected from the current source;
controlling the built-in load to be communicated with the current source when the original load is switched from a working state to a rest state.
Optionally, the controlling the built-in load to be communicated with the current source before the original load is switched from the rest state to the working state includes:
controlling the built-in load to be communicated with the current source for a first preset time before the original load is switched from a rest state to a working state;
wherein the first preset time period is determined based on a time period from a time when the built-in load is connected with the current source to a time when a current flowing through the built-in load is stabilized, when the original load is disconnected from the current source.
Optionally, the method further comprises:
controlling the built-in load to be disconnected from the current source for a second preset duration after the original load is switched from the working state to the rest state;
the second preset time period is determined based on a time period from when the original load is disconnected from the current source to when the current flowing through the original load is less than or equal to a preset threshold when the original load is connected with the current source and the current flowing through the original load is stable.
In a third aspect, there is provided a device for stabilizing a load operating current, the device comprising:
the first control module is used for controlling the built-in load to be communicated with the current source before the original load is switched from a rest state to a working state;
the second control module is used for controlling the built-in load to be disconnected with the current source when the original load is switched from a rest state to a working state;
and the third control module is used for controlling the built-in load to be communicated with the current source when the original load is switched from a working state to a rest state.
In a fourth aspect, a device for stabilizing a load operating current is provided, the device comprising a processor and a memory; the memory stores therein a program that is loaded and executed by the processor to implement the method of stabilizing a load operating current according to the second aspect.
In a fifth aspect, a computer-readable storage medium is provided, in which a program is stored, the program being loaded and executed by the processor to implement the method for stabilizing a load operating current according to the second aspect.
The beneficial effect of this application lies in: setting a current source, a load control component, an original load and a built-in load; the original load and the built-in load are respectively connected with the output end of the current source; the load control component is connected with the output end of the current source; the current-voltage characteristic of the built-in load is matched with the current-voltage characteristic of the original load; the problem that the working current of the original load is unstable due to the fact that the level of the output end of the current source jumps when the original load is switched in state and the current control assembly controls the current supplied by the current source to the outside is influenced can be solved; when the original load is switched from the rest state to the working state, is in the working state or is switched from the working state to the rest state, the load control assembly can control the built-in load to carry out corresponding state switching so as to keep the level of the current source output end stable when the original load works, therefore, the interference on the current control assembly can not be generated, and the effect of stabilizing the working current of the original load can be achieved.
The foregoing description is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clear and clear, and to implement the technical solutions according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a circuit structure of a prior art LED display screen according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a circuit configuration when a switch is closed according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a circuit configuration when a switch is open according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an operating state of an LED display unit according to an embodiment of the present application;
FIG. 5 is a schematic diagram of waveforms for operation of the switches provided by one embodiment of the present application;
FIG. 6 is a schematic diagram of waveforms for operation of a switch provided by another embodiment of the present application;
FIG. 7 is a schematic structural diagram of a device for stabilizing a load operating current according to an embodiment of the present application;
FIG. 8 is a schematic diagram of raw load and built-in load operational timing provided by one embodiment of the present application;
FIG. 9 is a schematic diagram of raw load and built-in load operational timing provided by another embodiment of the present application;
FIG. 10 is a flow chart of a method for stabilizing a load operating current provided by one embodiment of the present application;
FIG. 11 is a block diagram of a device for stabilizing the operating current of a load according to an embodiment of the present application;
fig. 12 is a block diagram of a device for stabilizing a load operating current according to an embodiment of the present application.
Detailed Description
The following detailed description of embodiments of the present application will be described in conjunction with the accompanying drawings and examples. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.
Fig. 1 is a schematic circuit diagram of a prior art LED display screen according to an embodiment of the present application. The circuit structure of the LED display screen comprises a current source 1, a load control component 2, at least one path of original load 3 and a current control component 4.
Fig. 1 illustrates an example of 2-way original load, and in other embodiments, the original load may be 1-way or multiple-way.
The current source 1 is used to supply an operating current to a connected primary load 3.
The current control component 4 is connected to the output terminals of a plurality of current sources 1 (e.g., current sources 11 and 12 in fig. 1) to control the plurality of current sources 1 to provide the same operating current to the corresponding original load 3.
The primary load 3 comprises an LED display unit.
The primary load 3 is connected to the current source 1 via the load control component 2. Wherein, the load control component 2 is used for controlling the connection or disconnection of the original load 3 and the current source 1. The load control component 2 may be a switch circuit.
The load control assembly 2 controls lighting or extinguishing of the LED display unit in the original load 3. Taking the load control component 2 as an example of a switch, referring to fig. 2, when the switch 21 is closed, the LED display unit 31 is connected to the current source 1, at this time, the LED display unit 31 is lit, and the original load 3 is in a working state; referring to fig. 3, when the switch 21 is turned off, the LED display unit 31 is disconnected from the current source 1, and at this time, the LED display unit 31 is turned off, and the original load 3 is in a rest state. Fig. 2 and fig. 3 take one path of original load in fig. 1 as an example for explanation, and the principle of the other path of original load is the same, which is not described herein again.
Referring to fig. 4, the LED display unit is not always lit during use, but is periodically lit based on a display period. As can be seen from fig. 4, one display period T includes a display time and a blanking time. In the display time of the display period, the switch 21 is closed, the current source 11 outputs current to the outside, and the LED display unit 31 is turned on; in the blanking time of the display period, the switch 21 is turned off, the current source 11 does not output a current to the outside, and the LED display unit 31 is turned off.
Since the LED display unit 31 needs to be switched between on and off states, the current source needs to be switched between on and off states accordingly. Referring to fig. 2, it is assumed that when the LED display unit 31 is lit, the voltage difference across the original load 3 is Vload(ii) a The supply voltage of the current source 1 is VCC. At this time, when the LED display unit 31 is lit, the a point level is Vload(ii) a When the LED display unit 31 is turned off, the a point level is VCC. From the above process, when the LED display unit 31 is switched from off to on, the a point level jumps from VCC to Vload. At this time, the generated transient disturbance Δ v/Δ t may affect the current control component 4 to control the magnitude of the externally supplied current by the current source 11, so that the externally supplied current by the current source 1 when being connected has an unstable to stable establishment process, thereby affecting the display effect of the LED display unit 31 during this time. The larger the momentary disturbance Δ v/Δ t, the longer the settling process from instability to stability when the current source 11 supplies current to the outside, and the larger the influence on the display effect of the LED display unit 31.
Among other things, the impact on the display effect of the LED display unit 31 includes causing high contrast interference.
In a first scenario, in the circuit configuration shown in fig. 1, if the load control component 2 controls the connection or disconnection between the two original loads 3 and the current source 1 according to the waveform shown in fig. 5, at time t1, the LED display units 31 and 32 are both turned on, and the current control component 4 is affected by the transient interference generated by the level jumps at the output terminals of the current sources 11 and 12, so as to affect the currents output by the current sources 11 and 12.
In a second scenario, in the circuit configuration shown in fig. 1, if the load control component 2 controls the connection or disconnection between the two original loads 3 and the current source 1 according to the waveform shown in fig. 6, at time t1, the LED display unit 31 is turned on, the LED display unit 32 is still turned off, and a level jump at the output terminal of the current source 11 generates a transient interference to affect the current control component 4.
Theoretically, the display luminance when the LED display unit 31 is lit in the first scene is the same as the display luminance when the LED display unit 31 is lit in the second scene. However, in actual use, the current control component 4 in the first scenario is interfered by two level jumps, and the current control component 4 in the second scenario is only interfered by one level jump, at this time, the interference experienced by the current control component 4 in the first scenario is 2 times of the interference experienced by the current control component 4 in the second scenario, and the fluctuation amount when the current control component 4 in the first scenario controls the current source 11 and the current source 12 is larger, at this time, the display brightness when the LED display unit 31 in the first scenario is turned on may be inconsistent with the display brightness when the LED display unit 31 in the second scenario.
Based on the above, the more current sources 1 connected to the current control component 4, the greater the maximum transient disturbance, and the longer the period of time for the current to stabilize from the unstable state.
Based on the technical problem, the application provides a stabilizing device for load working current, which additionally arranges a built-in load in parallel on each path of original load, wherein the volt-ampere characteristic of the built-in load is matched with the volt-ampere characteristic of the original load; when the original load is switched to the working state from the rest state, the load control assembly can control the built-in load to carry out corresponding state switching so as to keep the level of the current source output end stable when the original load works, so that the problem that the stable display of the LED display unit is influenced due to the level jump of the current source output end can not be caused when the original load is in the working state, the interference on the current control assembly due to the level jump can be avoided when the state of the original load is switched, and the display effect of the LED display unit is improved.
It should be added that the stabilizing device for load working current provided by the present application is not only suitable for use scenarios in which the original load includes an LED display unit, but also can be used in scenarios in which the original load is another type of load.
The following describes the device for stabilizing the load operating current provided by the present application in detail.
Fig. 7 is a schematic structural diagram of a device for stabilizing a load operating current according to an embodiment of the present application, as shown in fig. 1, the device at least includes: a current source 710, a load control component 720, a raw load 730, and a built-in load 740.
A current source 710 for providing an operating current to a primary load 730. The original load 730 refers to a load to which the current source 710 is originally connected. In this embodiment, the current source 710 is further configured to provide a working current for the built-in load 740; the built-in load 740 is a load that is additionally provided and is connected in parallel with the original load 730.
The original load 730 and the built-in load 740 are respectively connected to the output terminal of the current source 710 through the load control component 720. The current-voltage characteristic of the built-in load 740 is matched with the current-voltage characteristic of the original load 730, that is, the current-voltage characteristics are consistent.
The load control component 720 is used for controlling the original load 730 to be connected or disconnected with the current source 710, and controlling the built-in load 740 to be connected or disconnected with the current source 710.
In this application, when the original load 730 is connected to the current source 710, the original load 730 is in a working state; when the primary load 730 is disconnected from the current source 710, the primary load 730 is at rest. When the built-in load 740 is connected to the current source 710, the built-in load 740 is in a working state; when the built-in load 740 is disconnected from the current source 710, the built-in load 740 is in a rest state.
Alternatively, the raw load 730 and the built-in load 740 may be controlled using the same load control component 720; alternatively, different load control components 720 may be used for control. The load control component 720 may be a switching circuit.
Optionally, the device for stabilizing the load working current further comprises a current control component 750. The current control element 750 may be connected to a control terminal of the current magnitudes of the plurality of current sources 710 to control the output currents of the plurality of current sources 710 to be uniform.
Optionally, the primary load 730 includes an LED display unit. The built-in load 740 may include loads of the same or different types as the loads in the original load 730, such as: the type of load in the built-in load 740 is the same as the type of load in the original load 730, and is an LED display unit.
Referring to the operation timing diagram of the original load and the built-in load shown in fig. 8, in the present embodiment, the load control component 720 is further configured to:
1. before the original load 730 is switched from the rest state to the working state, the built-in load 740 is controlled to be connected to the current source 710. In one example, assume that the original load 730 is in operation with a pressure differential across it of VloadThe voltage-current characteristic of the built-in load 740 is the same as that of the original load 730, and therefore, the voltage difference between the two ends of the built-in load 740 is also V when the built-in load is in the working stateload. Before the original load 730 enters the working state, if the built-in load 740 is connected to the current source 710, the level of the point a (the output end of the current source 710) is Vload。
In addition, although the transient interference generated by the jump of the a-point level affects the current control element 750 when the built-in load 740 is connected to the current source 710, the original load 730 is at rest, so the interference at this time does not affect the original load 730.
2. When the original load 730 is switched from the rest state to the working state, the built-in load 740 is controlled to be disconnected from the current source 710. Based on the example of the point 1, when the original load 730 is switched from the rest state to the working state, the original load 730 is connected to the current source 710, and the level of the point a (the output end of the current source 710) is VloadAt this time, the level at point a does not generate a transition.
3. When the original load 730 is switched from the working state to the rest state, the built-in load 740 is controlled to be communicated with the current source 710. Based on the above 1 st point andin the example of point 2, when the original load 730 is switched from the working state to the rest state, the original load 730 is disconnected from the current source 710, at this time, the built-in load 740 is connected to the current source 710, and the level of the point a (the output end of the current source 710) is still VloadAt this time, the level at point a does not generate a transition.
According to the above 3 processes, when the original load 730 is in the working state, before and after the working state, the level of the output terminal of the current source 710 does not jump, and therefore, the current control component 750 is not disturbed, and the working current of the original load 730 is not affected. Therefore, when the primitive load 730 includes the LED display unit, and the primitive load 730 switches the state, the operating current of the LED display unit is stable, and therefore, the stable display of the LED display unit is not affected.
Alternatively, referring to the operation timing diagram of the original load and the built-in load shown in fig. 9, in order to reduce the power consumption of the stabilizing device of the load operation current, the load control component 720 controls the built-in load 740 to be communicated with the current source 710 for a first preset time period before the original load 730 is switched from the rest state to the operation state.
The first preset time period is determined based on a time period from when the on-board load 740 is connected to the current source 710 to when the current flowing through the on-board load 740 is stabilized when the original load 730 is disconnected from the current source 710. Illustratively, the first predetermined time period is greater than or equal to a time period from a time when the built-in load 740 is connected to the current source 710 to a time when the current flowing through the built-in load 740 is stabilized.
Since in actual implementation, the current source 710 provides current to the built-in load 740, the current does not rise suddenly but rises gradually; when the current source 710 stops supplying current to the built-in load 740, the current does not stop instantaneously but has a descending process, and therefore, the built-in load 740 has a transition from the rest state to the working state. As can be seen from the above, the time required for the built-in load 740 to switch from the rest state to the working state is as follows: the time period during which the current through the built-in load 740 rises from 0 to the normal operating current (the operating current is stable).
Since the built-in load 740 is controlled to be connected to the current source 710 only for the first preset time period before the original load 730 is switched from the rest state to the working state, it can be ensured that the current provided by the current source 710 to the built-in load 740 is stable before the original load 730 is switched to the working state, and at this time, there is no level jump when the original load 730 is switched to the working state. Therefore, in this embodiment, it is not necessary for the built-in load 740 to be connected to the current source 710 before the original load 730 is switched to the operating state for the first preset time, and it is also ensured that no level jump occurs when the original load 730 is switched to the operating state after that, and the effect of reducing power consumption while stabilizing the load operating current can be achieved.
Optionally, referring to fig. 9, the load control component 720 is further configured to: the built-in load 740 is controlled to be disconnected from the current source 710 for a second predetermined duration after the original load 730 is switched from the working state to the rest state. The second preset time period is determined based on a time period from when the original load 730 is disconnected from the current source 710 to when the current flowing through the original load 730 is less than or equal to a preset threshold value, when the original load 730 is connected to the current source 710 and the current flowing through the original load 730 is stable. Illustratively, the second preset duration is greater than or equal to a duration elapsed from a time when the original load 730 is disconnected from the current source 710 to when the current flowing through the original load 730 is less than or equal to a preset threshold. The preset threshold may be 0, and certainly, may also be other numerical values slightly larger than 0, and the value of the preset threshold is not limited in this embodiment.
Since in actual implementation, the current source 710 provides the original load 730 with current, the current does not rise suddenly but rises gradually; when the current source 710 stops supplying current to the original load 730, the current does not stop instantaneously but has a descending process, and therefore, the original load 730 has a transition from the operating state to the rest state. As can be seen from the above, the time required for the original load 730 to switch from the working state to the rest state is as follows: the time period during which the current flowing through the original load 730 drops from the normal operation current (stable operation current) to 0.
At the second preset time after the original load 730 is switched from the working state to the rest state, the built-in load 740 is controlled to be disconnected from the current source 710, and at this time, although there is a jump in the level of the output end of the current source, since the original load 730 is already completely switched to the rest state, the jump does not affect the original load 730. Therefore, in this embodiment, the built-in load 740 does not need to be connected to the current source 710 after the original load 730 is switched to the rest state for the second preset duration, so that the effect of reducing power consumption while stabilizing the load working current can be achieved.
In summary, the stabilizing device for load working current provided in this embodiment sets the current source, the load control component, the original load, and the built-in load; the original load and the built-in load are respectively connected with the output end of the current source; the load control component is connected with the output end of the current source; the current-voltage characteristic of the built-in load is matched with the current-voltage characteristic of the original load; the problem that the working current of the original load is unstable due to the fact that the level of the output end of the current source jumps when the original load is switched in state and the current control assembly controls the current supplied by the current source to the outside is influenced can be solved; when the original load is switched from the rest state to the working state, is in the working state or is switched from the working state to the rest state, the load control assembly can control the built-in load to carry out corresponding state switching so as to keep the level of the current source output end stable when the original load works, therefore, the interference on the current control assembly can not be generated, and the effect of stabilizing the working current of the original load can be achieved.
In addition, the built-in load is controlled to be communicated with the current source only within the first preset time before the original load is switched from the rest state to the working state, so that the current provided by the current source to the built-in load is stable before the original load is switched to the working state, and at the moment, no level jump exists when the original load is switched to the working state. Therefore, in this embodiment, it is not necessary for the built-in load to be connected to the current source before the original load is switched to the operating state for the first preset time, and it is also possible to ensure that no level jump occurs when the original load is switched to the operating state after the original load is switched to the operating state, so that the effect of reducing power consumption while stabilizing the load operating current can be achieved.
In addition, the built-in load is controlled to be disconnected with the current source for a second preset time after the original load is switched from the working state to the rest state, at this time, although the level of the output end of the current source jumps, the jump does not affect the original load because the original load is completely switched to the rest state. Therefore, in this embodiment, the built-in load does not need to be connected to the current source after the original load is switched to the rest state for the second preset duration, and the effect of reducing power consumption while stabilizing the load working current can be achieved.
Fig. 10 is a flowchart of a method for stabilizing a load operating current according to an embodiment of the present application, where the method is applied to the device for stabilizing a load operating current shown in fig. 7, and the main execution subject of each step is illustrated as an example in the load control component 720 in the system. The method at least comprises the following steps:
In one example, the built-in load remains connected to the current source for the time period before the original load switches from the rest state to the active state.
In another example, the built-in load is controlled to be communicated with the current source for a first preset time length before the original load is switched from the rest state to the working state; the first preset time length is determined based on the time length from the connection moment of the built-in load and the current source to the cut-off moment of the current flowing through the built-in load when the original load is disconnected from the current source.
Since the built-in load is controlled to be communicated with the current source only within the first preset time before the original load is switched from the rest state to the working state, the current provided by the current source to the built-in load can be ensured to be stable before the original load is switched to the working state, and at the moment, no level jump exists when the original load is switched to the working state. Therefore, in this embodiment, it is not necessary for the built-in load to be connected to the current source before the original load is switched to the operating state for the first preset time, and it is also possible to ensure that no level jump occurs when the original load is switched to the operating state after the original load is switched to the operating state, so that the effect of reducing power consumption while stabilizing the load operating current can be achieved.
In one example, the load control component maintains the built-in load in communication with the current source after the original load is switched from the on state to the off state.
In another example, the built-in load is controlled to be disconnected from the current source after a second preset time period after the original load is switched from the working state to the rest state. The second preset time period is determined based on the time period from the moment when the original load is connected with the current source and the current flowing through the original load is stable to cut off when the current flowing through the original load is less than or equal to the preset threshold.
And controlling the built-in load to be disconnected with the current source for a second preset time after the original load is switched from the working state to the rest state, wherein at the moment, although the level of the output end of the current source jumps, the jump does not influence the original load because the original load is completely switched to the rest state. Therefore, in this embodiment, the built-in load does not need to be connected to the current source after the original load is switched to the rest state for the second preset duration, and the effect of reducing power consumption while stabilizing the load working current can be achieved.
For relevant details reference is made to the above-described apparatus embodiments.
In summary, in the method for stabilizing the load working current provided by this embodiment, the built-in load is controlled to be connected to the current source before the original load is switched from the rest state to the working state; when the original load is switched from a rest state to a working state, the built-in load is controlled to be disconnected with the current source; when the original load is switched from a working state to a rest state, the built-in load is controlled to be communicated with the current source; the problem that the working current of the original load is unstable due to the fact that the level of the output end of the current source jumps when the original load is switched in state and the current control assembly controls the current supplied by the current source to the outside is influenced can be solved; when the original load is switched from the rest state to the working state, is in the working state or is switched from the working state to the rest state, the load control assembly can control the built-in load to carry out corresponding state switching so as to keep the level of the current source output end unchanged when the original load works, therefore, the interference on the current control assembly can not be generated, and the effect of stabilizing the working current of the original load can be achieved.
Fig. 11 is a block diagram of a load operating current stabilizing device according to an embodiment of the present application, and this embodiment is described by taking an example in which the device is applied to the load operating current stabilizing device shown in fig. 7. The device at least comprises the following modules: a first control module 1110, a second control module 1120, and a third control module 1130.
A first control module 1110, configured to control the built-in load to be connected to the current source before the original load is switched from a rest state to an operating state;
a second control module 1120, configured to control the built-in load to be disconnected from the current source when the original load is switched from a rest state to an operating state;
the third control module 1130 is configured to control the built-in load to be connected to the current source when the original load is switched from the operating state to the rest state.
For relevant details reference is made to the above-described embodiments.
It should be noted that: in the above embodiment, when stabilizing the load working current, the stabilizing device for the load working current is exemplified by only the division of the functional modules, and in practical applications, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the stabilizing device for the load working current is divided into different functional modules, so as to complete all or part of the functions described above. In addition, the stabilizing device of the load working current provided by the above embodiment and the stabilizing method embodiment of the load working current belong to the same concept, and the specific implementation process thereof is detailed in the method embodiment and is not described herein again.
Fig. 12 is a block diagram of a device for stabilizing a load operating current according to an embodiment of the present application, which may be a device for stabilizing a load operating current shown in fig. 1. The apparatus includes at least a processor 1201 and a memory 1202.
Processor 1201 may include one or more processing cores such as: 4 core processors, 12 core processors, etc. The processor 1201 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 1201 may also include a main processor and a coprocessor, where the main processor is a processor for processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state.
Memory 1202 may include one or more computer-readable storage media, which may be non-transitory. Memory 1202 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 1202 is used to store at least one instruction for execution by processor 1201 to implement a method of stabilizing a load operating current provided by method embodiments of the present application.
In some embodiments, the device for stabilizing the load working current may further include: a peripheral interface and at least one peripheral. The processor 1201, memory 1202, and peripheral interface may be connected by bus or signal lines. Each peripheral may be connected to the peripheral interface via a bus, signal line, or circuit board. Illustratively, peripheral devices include, but are not limited to: radio frequency circuit, touch display screen, audio circuit and power etc..
Of course, the device for stabilizing the load working current may also include fewer or more components, which is not limited in this embodiment.
Optionally, the present application further provides a computer-readable storage medium, in which a program is stored, and the program is loaded and executed by a processor to implement the method for stabilizing the load working current of the above method embodiment.
Optionally, the present application further provides a computer product, which includes a computer-readable storage medium, in which a program is stored, and the program is loaded and executed by a processor to implement the method for stabilizing the load working current of the above method embodiment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A device for stabilizing a load operating current, said device comprising: the load control circuit comprises a current source, a load control component, an original load and a built-in load;
the current source is used for providing working current for the original load;
the original load and the built-in load are respectively connected with the output end of the current source through the load control component; the load control component is used for controlling connection or disconnection of the original load and the current source and controlling connection or disconnection of the built-in load and the current source;
wherein the current-voltage characteristic of the built-in load matches the current-voltage characteristic of the original load;
the load control assembly is configured to:
controlling the built-in load to be communicated with the current source before the original load is switched from a rest state to a working state;
when the original load is switched from a rest state to a working state, controlling the built-in load to be disconnected from the current source;
controlling the built-in load to be communicated with the current source when the original load is switched from a working state to a rest state.
2. The apparatus of claim 1, wherein the load control component is to:
controlling the built-in load to be communicated with the current source for a first preset time before the original load is switched from a rest state to a working state;
wherein the first preset time period is determined based on a time period from a time when the built-in load is connected with the current source to a time when a current flowing through the built-in load is stabilized, when the original load is disconnected from the current source.
3. The apparatus of claim 2, wherein the load control component is to:
controlling the built-in load to be disconnected from the current source for a second preset duration after the original load is switched from the working state to the rest state;
the second preset time period is determined based on a time period from when the original load is disconnected from the current source to when the current flowing through the original load is less than or equal to a preset threshold when the original load is connected with the current source and the current flowing through the original load is stable.
4. A device according to any one of claims 1 to 3, wherein the primary load comprises an LED display unit.
5. A device according to any one of claims 1 to 3, further comprising a current control component coupled to an output of the current source;
the current control component is used for controlling the current output by the connected current source to be consistent.
6. A method of stabilizing a load operating current, for use in a device for stabilizing a load operating current according to any one of claims 1 to 5, the method comprising:
controlling the built-in load to be communicated with the current source before the original load is switched from a rest state to a working state;
when the original load is switched from a rest state to a working state, controlling the built-in load to be disconnected from the current source;
controlling the built-in load to be communicated with the current source when the original load is switched from a working state to a rest state.
7. The method of claim 6, wherein controlling the built-in load to communicate with the current source before the raw load switches from a rest state to an active state comprises:
controlling the built-in load to be communicated with the current source for a first preset time before the original load is switched from a rest state to a working state;
wherein the first preset time period is determined based on a time period from a time when the built-in load is connected with the current source to a time when a current flowing through the built-in load is stabilized, when the original load is disconnected from the current source.
8. The method of claim 6, further comprising:
controlling the built-in load to be disconnected from the current source for a second preset duration after the original load is switched from the working state to the rest state;
the second preset time period is determined based on a time period from when the original load is disconnected from the current source to when the current flowing through the original load is less than or equal to a preset threshold when the original load is connected with the current source and the current flowing through the original load is stable.
9. A load handling current stabilizing device for use in a load handling current stabilizing device according to any one of claims 1 to 5, said device comprising:
the first control module is used for controlling the built-in load to be communicated with the current source before the original load is switched from a rest state to a working state;
the second control module is used for controlling the built-in load to be disconnected with the current source when the original load is switched from a rest state to a working state;
and the third control module is used for controlling the built-in load to be communicated with the current source when the original load is switched from a working state to a rest state.
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| CN201910508593.5A CN110174853B (en) | 2019-06-13 | 2019-06-13 | Load working current stabilizing device and method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011118555A1 (en) * | 2010-11-19 | 2012-05-24 | Magna Mirrors Holding Gmbh | Stabilizing unit for load current in electrical consumer, such as light emitting diodes in vehicle power supply system of passenger vehicle, comprises controllable current regulator, which is aligned to set in current circuit |
| CN104486869A (en) * | 2014-11-25 | 2015-04-01 | 周鸿德 | Lamp capable of automatically stabilizing working voltage and current |
| CN105592605A (en) * | 2014-10-22 | 2016-05-18 | 上海新进半导体制造有限公司 | LED load driving circuit |
| CN109217739A (en) * | 2017-06-29 | 2019-01-15 | 庞巴迪运输公司 | Method for detecting load difference |
-
2019
- 2019-06-13 CN CN201910508593.5A patent/CN110174853B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011118555A1 (en) * | 2010-11-19 | 2012-05-24 | Magna Mirrors Holding Gmbh | Stabilizing unit for load current in electrical consumer, such as light emitting diodes in vehicle power supply system of passenger vehicle, comprises controllable current regulator, which is aligned to set in current circuit |
| CN105592605A (en) * | 2014-10-22 | 2016-05-18 | 上海新进半导体制造有限公司 | LED load driving circuit |
| CN104486869A (en) * | 2014-11-25 | 2015-04-01 | 周鸿德 | Lamp capable of automatically stabilizing working voltage and current |
| CN109217739A (en) * | 2017-06-29 | 2019-01-15 | 庞巴迪运输公司 | Method for detecting load difference |
Non-Patent Citations (1)
| Title |
|---|
| 利用等效负载稳定电流;罗兵;《集成电路应用》;19930630;第41页 * |
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