CN107221286B - Drive circuit, drive current control method and processor - Google Patents
Drive circuit, drive current control method and processor Download PDFInfo
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- CN107221286B CN107221286B CN201710623312.1A CN201710623312A CN107221286B CN 107221286 B CN107221286 B CN 107221286B CN 201710623312 A CN201710623312 A CN 201710623312A CN 107221286 B CN107221286 B CN 107221286B
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- G—PHYSICS
- 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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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Control Of El Displays (AREA)
Abstract
The invention provides a driving circuit, a driving current control method and a processor, and relates to the technical field of light emitting diode driving. The driving circuit is used for driving a passive light emitting diode matrix circuit, and the passive light emitting diode matrix circuit comprises a plurality of light emitting diodes distributed in a matrix. The drive circuit includes a current source, a processor, and a control circuit. The processor is used for controlling the current sources to output the same current in preset time intervals belonging to the same period so as to enable the brightness of the light-emitting diodes lightened in the period to be the same, and can control the current sources to output currents comprising at least two different amplitudes in one preset time interval. The problem that in the prior art, a driving circuit is very complex in design because the driving circuit can be required to output driving current with any amplitude can be solved by controlling the current source to output current with at least two different amplitudes within a preset time length.
Description
Technical field
The present invention relates to light emitting diode actuation techniques fields, in particular to a kind of driving circuit, driving current control
Method processed and processor.
Background technique
With the continuous development of display technology, people also increasingly pay close attention to display effect.In existing technology, usually
Display operation is carried out to content to be displayed under the driving of driving voltage or driving current using light emitting diode.In more hair
In the application circuit of optical diode, passive type dot matrix LEDs circuit is widely used in each row due to simple structure
Each industry.
Passive type dot matrix LEDs circuit is generally adopted by electric current driving, and during driving, generally needs
Light emitting diode is controlled within the different periods generate different brightness.In traditional actuation techniques, generally by control
For the duty ratio of driving current to realize the control of the brightness to light emitting diode, i.e., different brightness corresponds to that amplitude is identical and duty
Than different driving currents.This method, there are light-emitting diode luminous efficiency differences due to driving current concentrates on a period
Problem.In order to improve the luminous efficiency of light emitting diode, the prior art generally by design more complicated driving circuit with
Corresponding driving current is exported according to specific brightness demand, i.e., different brightness corresponds to the driving current of different amplitudes.
It is through inventor the study found that different bright to meet by exporting the driving current of different amplitudes in the prior art
Degree demand, due to need driving circuit can export any amplitude driving current and there are driving circuit design it is extremely complex
Problem, and then there are the manufacturing cost of driving circuit height and manufacturing process challenges.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of driving circuit, driving current control method and processor, with
It solves in the prior art due to needing that driving circuit can export the driving current of any amplitude and there are driving circuit designs
Extremely complex problem, and then there are manufacturing cost height and manufacturing process challenges for solution driving circuit.
To achieve the above object, the embodiment of the present invention adopts the following technical scheme that
A kind of driving circuit, for driving passive type dot matrix LEDs circuit, the passive type light emitting diode square
Battle array circuit includes multiple light emitting diodes in matrix distribution.The driving circuit includes current source, processor and control circuit,
The control circuit includes multiple first control switches and multiple second control switches.
Connected with after the cathode connection of each light emitting diode of a line by corresponding first control switch and ground
It connects, passes through corresponding second control switch and the current source after the anode connection of each light emitting diode of same row
The control terminal of connection, each first control switch and each second control switch connects with the output end of the processor respectively
It connects.
The processor is successively connected in preset duration for controlling each first control switch, and control with it is current
Each second control switch conducting of the first control switch connection of conducting and the light emitting diode connection for needing to be lit, with
The light emitting diode for being lit the needs is lit, and each first control switch is respectively turned on once as a cycle.
The processor is also used to control the electricity that the current source exports in each preset duration for belonging to the same period
Flow identical so that the brightness for each light emitting diode being lit within the period is identical, and can control the current source and exist
Output includes the different electric current of at least two amplitudes in one preset duration.
In the embodiment of the present invention preferably selects, in the above drive circuit, the current source be it is multiple, respectively and respectively
The second control switch connection.
Each current source is respectively used to pass through second control switch in the second control switch conducting being attached thereto
Electric current is exported to corresponding light emitting diode, it is same in synchronization output phase that the processor is also used to control each current source
Electric current.
On the basis of the above, the embodiment of the invention also provides a kind of driving current control methods, are applied to above-mentioned driving
Circuit is to drive passive type dot matrix LEDs circuit, which comprises
Judge whether current source can export the electric current for currently needing to export, the amplitude of the electric current is first amplitude；
When the current source is unable to the electric current that output amplitude is the first amplitude, at least one amplitude is obtained less than institute
It states first amplitude and the first electric current that the current source can export and at least one amplitude is greater than the first amplitude and described
The second electric current that current source can export；
Control the current source be sequentially output in preset duration at least one described first electric current and at least one described in
Second electric current.
It is described to obtain at least one in above-mentioned driving current control method in the embodiment of the present invention preferably selects
The first electric current and at least one amplitude that amplitude is less than the first amplitude and the current source can export are greater than described first
The step of the second electric current that amplitude and the current source can export includes:
The quantity and amplitude for the first electric current that statistics amplitude is less than the first amplitude and the current source can export are big
In the first amplitude and the quantity of the second electric current that the current source can export；
When the quantity that the quantity of first electric current is multiple and/or described second electric current is multiple, according to default rule
It then obtains one in multiple first electric currents and/or obtains one in multiple second electric currents.
It is described according to preset rules in above-mentioned driving current control method in the embodiment of the present invention preferably selects
It obtains one in multiple first electric currents and/or one step in multiple second electric currents of acquisition includes:
It obtains in multiple first electric currents the first electric current of amplitude maximum and/or to obtain amplitude in multiple second electric currents the smallest
Second electric current.
In the embodiment of the present invention preferably selects, in above-mentioned driving current control method, the preset duration includes
The first time period and the second time period with chronological order, the control current source be sequentially output in preset duration to
First electric current and the step of at least one described second electric current, include: less
It controls the current source and exports at least one described second electric current within first period, in second period
Interior at least one described first electric current of output.
In the embodiment of the present invention preferably selects, in above-mentioned driving current control method, in the first electric current of acquisition
For one and when the second electric current of acquisition is one, the method also includes:
According to the size of the first amplitude, adjust separately first period duration and second period when
It is long.
It is described according to described first in above-mentioned driving current control method in the embodiment of the present invention preferably selects
The size of amplitude, the step of adjusting separately the duration and the duration of second period of first period include:
Calculate separately the first difference and the first amplitude and the institute of the amplitude of the first amplitude and first electric current
State the second difference of the amplitude of the second electric current；
According to first difference and second difference, adjust separately first period duration and it is described second when
The duration of section.
In the embodiment of the present invention preferably selects, in above-mentioned driving current control method, in the judgement current source
Whether the electric current that currently needs export can be exported, and before the step of amplitude of the electric current is first amplitude, the method is also wrapped
It includes:
The amplitude for the electric current that current source currently needs to export is obtained, which is first amplitude.
On the basis of the above, the embodiment of the invention also provides a kind of processor, including processing unit and storage unit and
It is stored in the computer program that can be run in storage unit and on a processing unit, the processing unit executes real when described program
Existing following steps:
Judge whether current source can export the electric current for currently needing to export, the amplitude of the electric current is first amplitude；
When the current source is unable to the electric current that output amplitude is the first amplitude, at least one amplitude is obtained less than institute
It states first amplitude and the first electric current that the current source can export and at least one amplitude is greater than the first amplitude and described
The second electric current that current source can export；
Control the current source be sequentially output in preset duration at least one described first electric current and at least one described in
Second electric current.
Driving circuit, driving current control method and processor provided by the invention, it is pre- at one by control current source
If output includes the different electric current of at least two amplitudes in duration, can solve in the prior art due to needing driving circuit can be with
It exports the driving current of any amplitude and to there is a problem of that driving circuit designs extremely complex, and then solves driving circuit and there is system
At high cost and manufacturing process challenge is made, driving circuit, driving current control method and processor are effectively improved
Dependable with function.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Fig. 1 is the structural block diagram of driving circuit provided in an embodiment of the present invention.
Fig. 2 is the application schematic diagram of driving circuit provided in an embodiment of the present invention.
Fig. 3 is the flow diagram of driving current control method provided in an embodiment of the present invention.
Fig. 4 is the flow diagram of step S130 in Fig. 3.
Fig. 5 is the flow diagram of step S150 in Fig. 3.
Fig. 6 is the structural block diagram of processor provided in an embodiment of the present invention.
Icon: 100- driving circuit；120- current source；140- processor；142- storage unit；144- processing unit；
160- control circuit；The first control switch of S1-；The second control switch of S2-；200- passive type dot matrix LEDs circuit；D-
Light emitting diode.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment only
It is a part of the embodiments of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings
The component of embodiment can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.In description of the invention
In, term " first ", " second " etc. are only used for distinguishing description, and should not be understood as only or imply relative importance.
As depicted in figs. 1 and 2, the embodiment of the invention provides a kind of driving circuits 100, for driving passive type luminous two
Pole pipe matrix circuit 200.The passive type dot matrix LEDs circuit 200 may include multiple in luminous the two of matrix distribution
Pole pipe D, the driving circuit 100 may include current source 120, processor 140 and control circuit 160.
Further, in the present embodiment, the control circuit 160 may include multiple first control switch S1 and multiple
Second control switch S2.It is opened with after the cathode connection of each light emitting diode D of a line by corresponding first control
It closes S1 to be connected to ground, passes through corresponding second control switch after the anode connection of each light emitting diode D of same row
S2 is connect with the current source 120, the control terminal difference of each first control switch S1 and each second control switch S2
It is connect with the output end of the processor 140.
The processor 140 is successively connected in preset duration for controlling each first control switch S1, and controls
Each second control for the light emitting diode D connection for connecting with the first control switch S1 be currently connected and needing to be lit is opened
S2 conducting is closed, so that described need the light emitting diode D being lit to be lit, each first control switch S1 is respectively turned on one
Secondary is a cycle.The processor 140 is also used to control the current source 120 in each preset duration for belonging to the same period
The electric current of interior output is identical so that the brightness for each light emitting diode D being lit within the period is identical, and can control
It includes the different electric current of at least two amplitudes that the current source 120 exports in a preset duration.
Optionally, in the passive type dot matrix LEDs circuit 200 each light emitting diode D specific distribution mode
Unrestricted, for example, it can be pass through corresponding the after connecting the cathode of each light emitting diode D of same row
One control switch S1 is connected to ground, and passes through corresponding second after the anode connection with each light emitting diode D of a line
Control switch S2 is connect with the current source 120.
Optionally, the concrete type of the first control switch S1 and the second control switch S2 are unrestricted, can be with
It is, but it is brilliant to be not limited to triode, Metal Oxide Semiconductor Field Effect Transistor, thyristor, silicon carbide transistor, gallium nitride
Body pipe, high electron mobility transistor and insulated gate bipolar transistor.
Optionally, the quantity of the current source 120 and set-up mode are unrestricted, can also be with for example, either multiple
One, if meet the same period flow through it is identical with the electric current of each light emitting diode D of a line.In the current source
120 for it is multiple when, for guarantee be lit with each light emitting diode D of a line when brightness it is identical, each current source 120
The electric current of output is identical.The current source 120 be one when, since the parameter of each light emitting diode D is identical, according to point
Principle is flowed, the electric current for flowing through each light emitting diode D with a line is also identical.In the present embodiment, the current source 120 is
It is multiple, it is connect respectively with each second control switch S2.Each current source 120 is respectively used in the second control being attached thereto
When making switch S2 conducting, electric current, the processor 140 are exported to corresponding light emitting diode D by the second control switch S2
It is also used to control each current source 120 and exports identical electric current in synchronization.
In conjunction with Fig. 3, the embodiment of the present invention also provides a kind of driving current control method, applied to above-mentioned driving circuit
100, to drive the passive type dot matrix LEDs circuit 200.Step defined in the related process of the method can be with
It is realized by the processor 140.Detailed process shown in Fig. 3 will be described in detail below.
Step S110 judges whether current source 120 can export the electric current for currently needing to export, and the amplitude of the electric current is the
One amplitude.
In the present embodiment, when designing the driving circuit 100, to guarantee that the driving circuit 100 has manufacturing cost
Low and manufacturing process simplicity feature, the current source 120 are limited by circuit, it is difficult to export each light emitting diode
The corresponding electric current of brightness that D needs.Therefore, when exporting electric current to each light emitting diode D by the current source 120,
Firstly the need of judging whether the current source 120 can export the electric current for currently needing to export, i.e., whether can output amplitude be
The electric current of first amplitude.The current source 120 can output amplitude be the first amplitude electric current when, directly to corresponding
Each light emitting diode D exports the electric current.And the electric current that output amplitude is the first amplitude is unable in the current source 120
When, execute step S130.
Optionally, before executing step S110, the processor 140 also needs to judge whether to prestore the current source
The amplitude of 120 electric currents for currently needing to export, when prestoring the amplitude, directly execution step S110.The width is not being prestored
When value, the method can also include the following steps so that the processor 140 is convenient for execution step S110: obtain current source
The amplitude of 120 electric currents for currently needing to export, the amplitude are first amplitude.
Step S130 obtains at least one when the current source 120 is unable to the electric current that output amplitude is the first amplitude
The first electric current and at least one amplitude that a amplitude is less than the first amplitude and the current source 120 can export are greater than described
The second electric current that first amplitude and the current source 120 can export.
In the present embodiment, by the design limitation of the driving circuit 100, in most cases, the current source 120
Be unable to output amplitude be the first amplitude electric current, inventor it has been investigated that, the light emitting diode D is in preset duration
By the brightness that generates when electric current that amplitude is the first amplitude, successively it is greater than described the by amplitude in preset duration
The second electric current and amplitude of one amplitude are less than the brightness generated when the first electric current of the first amplitude can be identical.Therefore, lead to
Crossing and obtaining the first electric current and the second electric current that the current source 120 can export to replace amplitude is the electricity of the first amplitude
Stream.
Optionally, the quantity of first electric current and second electric current is unrestricted, as long as meeting has at least one
The condition of first electric current and at least one second electric current.It is considered that according to multiple first electric currents and/or adopting
With multiple second electric currents, the frequency of 120 switching electric current of the current source output can be made excessively high, and then influence light emitting diode D's
Luminous efficiency.In conjunction with Fig. 4, in the present embodiment, step S130 may include step S131 and step S133.
Step S131, the first electric current that statistics amplitude is less than the first amplitude and the current source 120 can export
The quantity for the second electric current that quantity and amplitude are greater than the first amplitude and the current source 120 can export.
In the present embodiment, the processor 140 is stored with the corresponding each width of electric current that the current source 120 can export
Value, compared with each amplitude is carried out size with the first amplitude, with counted according to comparison result the quantity of first electric current with
The quantity of second electric current, and be to control the current source 120 for the moment to export first electricity in the quantity of first electric current
Stream is to control the current source 120 for the moment to export second electric current in the quantity of second electric current.If it exists multiple described
One electric current and/or there are multiple second electric currents, thens follow the steps S133.
Step S133 is pressed when the quantity that the quantity of first electric current is multiple and/or described second electric current is multiple
One in multiple first electric currents is obtained according to preset rules and/or obtains one in multiple second electric currents.
In the present embodiment, one in multiple first electric currents is obtained according to preset rules and/or obtain multiple second electricity
One specific embodiment in stream is unrestricted, for example, one in multiple first electric currents of random selection and/or random choosing
Select one in multiple second electric currents, be also possible to that minimum according to amplitude or maximum principle is selected, can also be according to
Amplitude is that principle is selected closest to the first amplitude.In the present embodiment, described can be obtained by following steps
One electric current and the second electric current: it obtains the first electric current of amplitude maximum in multiple first electric currents and/or obtains in multiple second electric currents
The smallest second electric current of amplitude.
Step S150, control the current source 120 be sequentially output in preset duration at least one described first electric current and
At least one described second electric current.
In the present embodiment, the concrete mode of first electric current and second electric current is exported in the preset duration
It is unrestricted, for example, being also possible to first export second electric current either first export first electric current.To guarantee hair
Luminous efficiency of the optical diode D in preset duration, in the present embodiment, the preset duration include having chronological order
The first time period and the second time period, step S150 may comprise steps of: control the current source 120 in first period
Interior at least one described second electric current of output, exports at least one described first electric current within second period.
In the present embodiment, for the matching degree for further improving the brightness that the brightness of light emitting diode D is issued with needs, institute
It states the first period corresponding duration and second period corresponding duration is adjustable.
Optionally, when adjusting first period and second period corresponding duration, specific Adjustment principle not by
Limitation, for example, when the first electric current of acquisition is one and the second electric current of acquisition is one, it can be according to the first amplitude
Size, adjust separately the duration and the duration of second period of first period.It, in the present embodiment, can in conjunction with Fig. 5
To adjust separately the duration and the duration of second period of first period by step S151 and step S153.
Step S151 calculates separately the first difference and described first of the amplitude of the first amplitude and first electric current
Second difference of amplitude and the amplitude of second electric current.
Step S153, according to first difference and second difference, adjust separately first period duration and
The duration of second period.
In this example, it is assumed that first electric current is I, second electric current is 2I, is first width in amplitude
When the electric current of value is 1.5I, when the first period corresponding duration and second period corresponding duration respectively account for described default
Long 50%, when the electric current that amplitude is the first amplitude is 1.4I, first period corresponding duration and described second
Period corresponding duration respectively accounts for the 40% and 60% of the preset duration.
In conjunction with Fig. 6, the embodiment of the present invention also provides a kind of processor 140, applied to above-mentioned driving circuit 100, to drive
Move the passive type dot matrix LEDs circuit 200.The processor 140 include storage unit 142 and processing unit 144 and
It is stored in the computer program that can be run in storage unit 142 and on processing unit 144, the processing unit 144 executes institute
It is performed the steps of when stating program
Judge whether current source 120 can export the electric current for currently needing to export, the amplitude of the electric current is first amplitude；
When the current source 120 is unable to the electric current that output amplitude is the first amplitude, it is small to obtain at least one amplitude
In the first amplitude and the first electric current that the current source 120 can export and at least one amplitude are greater than the first amplitude
And the second electric current that the current source 120 can export；
It controls the current source 120 and is sequentially output at least one described first electric current and at least one institute in preset duration
State the second electric current.
Optionally, the storage unit 142 may be, but not limited to, Random Access Storage Unit (RanDom Access
Memory, RAM), read-only memory unit (ReaD Only Memory, ROM) may be programmed read-only memory unit
(Programmable ReaD-Only Memory, PROM), erasable read-only memory unit (Erasable Programmable
ReaD-Only Memory, EPROM), electric erasable read-only memory unit (Electric Erasable Programmable
ReaD-Only Memory, EEPROM) etc..Wherein, storage unit 142 is for storing program, and processing unit 144 is held receiving
After row instruction, described program is executed.
The processing unit 144 may be a kind of IC chip, the processing capacity with signal.Above-mentioned processing list
Member 144 can be at General Porcess Unit, including central processing unit (Central Processing Unit, CPU), network
Manage unit (Network Processor, NP) etc..It can also be digital signal processing unit (DSP), specific integrated circuit
(ASIC), field programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components may be implemented or execute disclosed each method and step in the embodiment of the present invention.General Porcess Unit
It can be microprocessing unit or any conventional processing unit etc..
It is appreciated that structure shown in fig. 6 is only to illustrate, the processor 140 may also include it is more than shown in Fig. 6 or
The less component of person, or with the configuration different from shown in Fig. 6.Each component shown in Fig. 6 can using hardware, software or
A combination thereof is realized.
In conclusion driving circuit 100 provided by the invention, driving current control method and processor 140, pass through control
It includes the different electric current of at least two amplitudes that current source 120 exports in a preset duration, can solve in the prior art by
In needing that driving circuit 100 can export the driving current of any amplitude and there are driving circuits 100 to design extremely complex ask
Topic, and then driving circuit 100 is solved there are manufacturing cost height and manufacturing process challenge, effectively improve driving circuit
100, the dependable with function of driving current control method and processor 140.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of driving current control method, described applied to driving circuit to drive passive type dot matrix LEDs circuit
Passive type dot matrix LEDs circuit includes multiple light emitting diodes in matrix distribution, and the driving circuit includes electric current
Source, processor and control circuit, the control circuit include multiple first control switches and multiple second control switches；Same a line
Each light emitting diode cathode connection after be connected to ground by corresponding first control switch, each institute of same row
It is connect by corresponding second control switch with the current source after stating the anode connection of light emitting diode, each described first
The control terminal of control switch and each second control switch is connect with the output end of the processor respectively；The processor is used
It is successively connected in preset duration in controlling each first control switch, and controls and connect with the first control switch be currently connected
Each second control switch for the light emitting diode connection for connecing and needing to be lit is connected, so that the hair for needing to be lit
Optical diode is lit, and each first control switch is respectively turned on once as a cycle；The processor is also used to control
The electric current that the current source exports in each preset duration for belonging to the same period is identical so as to be lit within the period
The brightness of each light emitting diode is identical, and can control the current source and export in a preset duration includes at least two
The different electric current of a amplitude, which is characterized in that the described method includes:
Judge whether current source can export the electric current for currently needing to export, the amplitude of the electric current is first amplitude；
When the current source is unable to the electric current that output amplitude is the first amplitude, obtains at least one amplitude and be less than described the
The first electric current and at least one amplitude that one amplitude and the current source can export are greater than the first amplitude and the electric current
The second electric current that source can export；
Control the current source be sequentially output in preset duration at least one described first electric current and at least one described second
Electric current.
2. driving current control method according to claim 1, which is characterized in that described at least one amplitude of acquisition is less than
The first electric current and at least one amplitude that the first amplitude and the current source can export are greater than the first amplitude and institute
The step of stating the second electric current that current source can export include:
The quantity and amplitude for the first electric current that statistics amplitude is less than the first amplitude and the current source can export are greater than institute
State first amplitude and the quantity of the second electric current that the current source can export；
When the quantity that the quantity of first electric current is multiple and/or described second electric current is multiple, obtained according to preset rules
It takes one in multiple first electric currents and/or obtains one in multiple second electric currents.
3. driving current control method according to claim 2, which is characterized in that described multiple according to preset rules acquisition
One in first electric current and/or one step obtaining in multiple second electric currents include:
It obtains in multiple first electric currents the first electric current of amplitude maximum and/or to obtain amplitude in multiple second electric currents the smallest by second
Electric current.
4. driving current control method according to claim 1, which is characterized in that the preset duration includes having the time
The first time period and the second time period of sequencing, the control current source are sequentially output at least one institute in preset duration
It states the first electric current and the step of at least one described second electric current includes:
It controls the current source and exports at least one described second electric current within first period, it is defeated within second period
At least one described first electric current out.
5. driving current control method according to claim 4, which is characterized in that acquisition the first electric current be one and
When the second electric current obtained is one, the method also includes:
According to the size of the first amplitude, the duration and the duration of second period of first period are adjusted separately.
6. driving current control method according to claim 5, which is characterized in that described according to the big of the first amplitude
Small, the step of adjusting separately the duration and the duration of second period of first period, includes:
Calculate separately the first difference and the first amplitude and described the of the amplitude of the first amplitude and first electric current
Second difference of the amplitude of two electric currents；
According to first difference and second difference, adjust separately first period duration and second period
Duration.
7. driving current control method according to claim 1, which is characterized in that judge that current source whether can described
Before the step of electric current that output currently needs to export, the amplitude of the electric current is first amplitude, the method also includes:
The amplitude for the electric current that current source currently needs to export is obtained, which is first amplitude.
8. a kind of processor, which is characterized in that including processing unit and storage unit and be stored in storage unit and can locate
The computer program run on reason unit, the processing unit perform the steps of when executing described program
Judge whether current source can export the electric current for currently needing to export, the amplitude of the electric current is first amplitude；
When the current source is unable to the electric current that output amplitude is the first amplitude, obtains at least one amplitude and be less than described the
The first electric current and at least one amplitude that one amplitude and the current source can export are greater than the first amplitude and the electric current
The second electric current that source can export；
Control the current source be sequentially output in preset duration at least one described first electric current and at least one described second
Electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710623312.1A CN107221286B (en) | 2017-07-27 | 2017-07-27 | Drive circuit, drive current control method and processor |
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| CN201710623312.1A CN107221286B (en) | 2017-07-27 | 2017-07-27 | Drive circuit, drive current control method and processor |
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| CN100496172C (en) * | 2006-02-13 | 2009-06-03 | 盛群半导体股份有限公司 | Device and method for adjusting luminous diode brightness |
| KR100852349B1 (en) * | 2006-07-07 | 2008-08-18 | 삼성에스디아이 주식회사 | organic luminescence display device and driving method thereof |
| JP5968904B2 (en) * | 2010-12-21 | 2016-08-10 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | Device and method for controlling current to a solid state lighting circuit |
| CN102958236B (en) * | 2011-08-31 | 2015-03-11 | 美国亚德诺半导体公司 | Current control circuit and light emitting diode driver as well as manufacturing method thereof |
| CN103889111B (en) * | 2014-02-28 | 2016-07-27 | 上海路千电子科技有限公司 | The linear constant current drive circuit of a kind of twin voltage operation and driving method thereof |
| CN106332380B (en) * | 2015-06-17 | 2018-11-30 | 芯京源微电子(合肥)有限公司 | Light emission drive circuit and light emitting device |
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