CN109743509A - A kind of method and device for camera light filling - Google Patents
A kind of method and device for camera light filling Download PDFInfo
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- CN109743509A CN109743509A CN201910035179.7A CN201910035179A CN109743509A CN 109743509 A CN109743509 A CN 109743509A CN 201910035179 A CN201910035179 A CN 201910035179A CN 109743509 A CN109743509 A CN 109743509A
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Abstract
The embodiment of the invention discloses a kind of method and devices for camera light filling, this method comprises: obtaining the pulsewidth of the first control signal when delay switching circuit receives the first control signal of signal input circuit transmission；According to the pulsewidth of the first control signal and default pulse width threshold, the useful signal sent to driving circuit is determined, so that the driving circuit carries out light filling to camera according to the useful signal.The technical solution of the embodiment of the present invention solves in the prior art when carrying out light filling to camera, it is higher to power requirement, it is unable to control exposure time and the larger technical problem of power consumption, realizing light filling circuit can control the duration of exposure, thereby reduce the technical effect of power consumption.
Description
Technical field
The present embodiments relate to circuit field more particularly to a kind of method and devices for camera light filling.
Background technique
Optics is dynamic to catch field to reduce motion blur, needs to carry out short-time exposure during camera imaging, using close
Infrared light filling increases exposure brightness.In order to cope with different space enrironments, exposure time is adjustable, it is therefore desirable to light filling
Circuit is cooperating therewith.Current existing light filling circuit exists to power requirement height, is unable to control exposure time or limitation power consumption
The problem of.
Summary of the invention
The present invention provides a kind of method and device for camera light filling, with realize effective control to camera light filling when
It is long, and then reduce the technical effect of power consumption.
In a first aspect, the embodiment of the invention provides a kind of methods for camera light filling, this method comprises:
When delay switching circuit receives the first control signal of signal input circuit transmission, the first control signal is obtained
Pulsewidth；
According to the pulsewidth of the first control signal and default pulse width threshold, the effective letter sent to driving circuit is determined
Number, so that the driving circuit carries out light filling to camera according to the useful signal.
Further, it in the first control signal for receiving signal input circuit transmission when delay switching circuit, obtains
Before the pulsewidth of the first control signal, further includes:
The signal input circuit receives original control signal, and carries out at conversion and shaping to the original control signal
Reason, obtains the first control signal corresponding with the original control signal, and the first control signal is sent to
The delay switching circuit.
Further, the pulsewidth and default pulse width threshold according to the first control signal, true directed driven electricity
The useful signal that road is sent, so that the driving circuit carries out light filling to camera according to the useful signal, comprising:
It, then will be corresponding to the default pulse width threshold when the pulsewidth of the first control signal is greater than default pulse width threshold
Duration as effective light filling duration in the useful signal；
The useful signal is sent to the driving circuit, so that the driving circuit is according in the useful signal
Effective light filling duration carries out light filling to camera.
Further, the pulsewidth and default pulse width threshold according to the first control signal, true directed driven electricity
The useful signal that road is sent, so that the driving circuit carries out light filling to camera according to the useful signal, comprising:
When the pulsewidth of the first control signal is less than default pulse width threshold, then by the pulsewidth of the first control signal
Corresponding duration, as effective light filling duration in the useful signal；
The useful signal is sent to the driving circuit, so that the driving circuit is according in the useful signal
Effective light filling duration carries out light filling to camera.
Further, the method also includes: when the driving circuit according to the useful signal to camera carry out light filling
When, the moment luminous intensity of camera reaches the 200% of normal mode.
Further, the method also includes the power circuits that are connected with the driving circuit, and are arranged described
Two stage filter circuit on power circuit；
The output end of the power circuit is connected with the input terminal of the driving circuit, for mentioning to the driving circuit
For electric current；
The two stage filter circuit stores charge by the current value that the power circuit exports, and is used to provide the described driving
When circuit is to camera light filling, required portion of electrical current.
Further, the electric motor resistance value ratio of the two stage filter circuit is 1:1, and the ratio of capacitance is 1:2.
Further, the method also includes:
Based on the monitoring modular being arranged in the power circuit, the voltage value of the power circuit output end is monitored, when
When the voltage value is lower than predetermined voltage threshold, then stop providing electric current to the driving circuit.
Second aspect, the embodiment of the invention also provides one kind to be used for camera light compensating apparatus, which includes:
Pulsewidth obtains module, when for receiving the first control signal of signal input circuit transmission when delay switching circuit, obtains
Take the pulsewidth of the first control signal；
Supplementary lighting module, for the pulsewidth and default pulse width threshold according to the first control signal, true directed driven electricity
The useful signal that road is sent, so that the driving circuit carries out light filling to camera according to the useful signal.
Further, module is obtained in the pulsewidth, for sending out described when delay switching circuit receives signal input circuit
When the first control signal sent, before the pulsewidth for obtaining the first control signal, it is also used to:
The signal input circuit receives original control signal, and carries out at conversion and shaping to the original control signal
Reason, obtains the first control signal corresponding with the original control signal, and the first control signal is sent to
The delay switching circuit.
The third aspect, the embodiment of the invention also provides a kind of equipment, the equipment includes:
One or more processors；
Storage device, for storing one or more programs,
When one or more of programs are executed by one or more of processors, so that one or more of processing
Device realizes a kind of method for camera light filling as described in the embodiment of the present invention is any.
Fourth aspect, it is described the embodiment of the invention also provides a kind of storage medium comprising computer executable instructions
Computer executable instructions by computer processor when being executed for executing a kind of use as described in the embodiment of the present invention is any
In the method for camera light filling.
The technical solution of the embodiment of the present invention, by the first control for receiving signal input circuit transmission when delay switching circuit
When signal, the pulsewidth of the first control signal is obtained, according to the pulsewidth of the first control signal and default pulse width threshold,
Determine the useful signal sent to driving circuit, so that the driving circuit carries out light filling to camera according to the useful signal,
Solve in the prior art when to camera carry out light filling when, it is higher to power requirement, be unable to control exposure time and power consumption compared with
Big technical problem, realizing light filling circuit can control the duration of exposure, thereby reduce the technical effect of power consumption.
Detailed description of the invention
In order to more clearly illustrate the technical scheme of the exemplary embodiment of the present invention, below to required in description embodiment
The attached drawing to be used does a simple introduction.Obviously, the attached drawing introduced is present invention a part of the embodiment to be described
Attached drawing, rather than whole attached drawings without creative efforts, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of method flow schematic diagram for camera light filling provided by the embodiment of the present invention one；
Fig. 2 is block diagram corresponding with camera light compensation method provided by the embodiment of the present invention one；
Fig. 3 is a kind of apparatus structure schematic diagram for camera light filling provided by the embodiment of the present invention two；
Fig. 4 is a kind of device structure schematic diagram provided by the embodiment of the present invention three.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is a kind of method flow schematic diagram for camera light filling provided by the embodiment of the present invention one, and the present invention is real
It applies example to be applicable to carry out camera the situation of light filling, this method can be executed by camera light compensating apparatus, which can lead to
The form for crossing software and/or hardware is realized.
As described in Figure 1, the method for the embodiment of the present invention includes:
S110, when delay switching circuit receive signal input circuit transmission first control signal when, obtain it is described first control
The pulsewidth of signal processed.
Wherein it is possible to will realize that circuit corresponding to camera light compensation method is known as camera light filling circuit.Referring to fig. 2, the phase
Machine light filling circuit 20 includes: signal input circuit 210, delay switching circuit 220, power circuit 230 and driving circuit 240.Camera
Signal input circuit 210 in light filling circuit 20 can be connected with computer or other equipment for issuing control signal, use
In the control signal for receiving computer or the sending of other equipment.
When signal input circuit 210 receives the control signal of computer or the transmission of other equipment, in order to avoid mending
There is capacitance-resistance and mismatch, and/or repair the mistake of signal caused by due to route etc. in optical circuit and the circuit of input control signal
The problems such as true, can first be handled control signal.
Optionally, signal input circuit 210 receive original control signal, and to original control signal 210 carry out conversion and
Shape correction obtains first control signal corresponding with original control signal, and first control signal is sent to electricity in limited time
Road.
Wherein it is possible to which inputting a signal into the signal that circuit receives is known as original control signal.To original control signal into
Row processing can be using conversion and Shape correction, can be by the methods of photoelectrical coupler and digital gate circuit to original control
Signal processed is handled, and low and high level pulse signal is obtained, using the pulse signal obtained at this time as first control signal, and will
The first control signal is sent to delay switching circuit by input circuit.
With continued reference to Fig. 2, the output end of signal input circuit 210 is connected with the input terminal of delay switching circuit 220, electric in limited time
Road 220 can receive the first control signal of the transmission of signal input circuit 210, and carry out pulsewidth processing to first control signal.
Wherein, carrying out processing to pulsewidth can be the pulsewidth of acquisition first control signal, that is, high electricity is kept in first control signal
Flat duration.
S120, pulsewidth and default pulse width threshold according to the first control signal, what determination was sent to driving circuit
Useful signal, so that the driving circuit carries out light filling to camera according to the useful signal.
It should be noted that can preset to reduce the power consumption for carrying out light filling to camera and carry out light filling to camera
Time threshold, that is, light filling maximum time is carried out to camera.
Wherein, default pulse width threshold can be the duration of pre-set permanent High level.Driving circuit can be understood as
The circuit for driving LED light emitting device luminous, that is, the duration that driving camera is luminous；Camera at this time can be understood as industrial phase
Machine.
With continued reference to Fig. 2, the output end of delay switching circuit 220 is connected with the input terminal of driving circuit 240, that is to say, that drives
Dynamic circuit can receive the useful signal of delay switching circuit transmission.
Specifically, when determining the relationship between pulsewidth and default pulse width threshold in first control signal, delay switching circuit
It can be sent to driving circuit about the useful signal for carrying out light filling to camera, driving circuit receives the useful signal, Jin Ergen
It shines according to useful signal driving LED, i.e., light filling is carried out to camera.
Wherein, the relationship between the pulsewidth of first control signal and default pulse width threshold may exist two kinds of situations, first
Kind is it may is that the pulsewidth of first control signal is greater than default pulse width threshold；Second situation can be first control signal
Pulsewidth is less than default pulse width threshold.
It optionally, then will be corresponding to default pulse width threshold when the pulsewidth of first control signal is greater than default pulse width threshold
Duration as effective light filling duration in useful signal；Useful signal is sent to driving circuit so that driving circuit according to
Effective light filling duration in useful signal carries out light filling to camera.
Wherein, the pulsewidth of first control signal can be understood as keep permanent High level duration when, can with set in advance
The pulse width threshold set is compared, that is, pre-sets the max-thresholds of permanent High level duration, optionally, presets pulse width threshold
For 2ms.When the duration of permanent High level in first control signal is greater than the time of default permanent High level, optionally, first is controlled
It, can be using duration corresponding to default pulse width threshold as useful signal when the time of permanent High level is greater than 2ms in signal processed
In effective light filling duration, which is sent to driving circuit, driving circuit can have according to effective light filling duration
A length of default pulse width threshold when light filling is imitated, light filling is carried out to camera, it can be understood as light filling is carried out to LED light emitting device.
Optionally, when the pulsewidth of first control signal is less than default pulse width threshold, then by the pulsewidth of first control signal
Corresponding duration, as effective light filling duration in useful signal；Useful signal is sent to driving circuit, so that driving electricity
Road carries out light filling to camera according to effective light filling duration in useful signal.
Wherein, it is also possible to there are the pulsewidths of first control signal to be less than default pulsewidth threshold during practical application
Value can keep the duration of high level as effective light filling duration in useful signal, simultaneously in first control signal at this time
And the useful signal is sent to driving circuit, driving circuit receives the useful signal, and according to the useful signal to camera into
Row light filling.
Carrying out light filling to camera using such mode is advantageous in that: driving circuit can be determined to phase by delay switching circuit
Machine carries out the duration of light filling, reduces the overall power of light filling circuit, and has also reached holding for limitation LED light emitting device temperature
It is continuous to rise, and then improve the technical effect of light filling circuit stability and service life.
Based on the above technical solution, when driving circuit receives the determining progress light filling to camera of useful signal
When long, it is also necessary to required electric current when providing to driving circuit to camera light filling.Referring to fig. 2, the output end of power circuit with
The input terminal of driving circuit is connected, for providing current value to driving current.The mainly efficient driving LED of driving circuit,
Namely carrying out light filling to camera makes the moment luminous intensity of LED light in camera reach the 200% of normal mode, needs power supply at this time
Circuit provides high current to driving circuit.
It should be noted that being only to describe a light filling circuit, during concrete application, one in the present embodiment
General supply is connected to multiple light filling circuits, and multiple light filling circuits carry out light filling, i.e. general supply and at least one electricity to camera respectively
Source circuit is connected, and provides voltage at least one power circuit.When multiple light filling circuits work at the same time, it is possible to deposit
The technical issues of the serious excess load of general supply influences light filling circuit stability, therefore based on the above technical solution,
Two stage filter circuit is provided in each power circuit.
Wherein, two stage filter circuit can be understood as RC filter circuit.It is not carried out to magazine LED in driving circuit
When light filling, power circuit is also to provide electric current to driving circuit, may be implemented to fill RC filter circuit according to the electric current
Electricity makes to be stored with charge in filter circuit.When driving circuit needs that LED is driven to shine, not only power circuit can be to driving
Circuit provides electric current, and two-stage RC filter circuit can also discharge charge and provide current value to driving circuit, and then realize to drive
Dynamic circuit provides high current, while also avoiding the larger technical problem of power circuit power consumption.
Wherein, during concrete application, the resistance ratio of two stage filter circuit can be set by calculating and simulating
With capacitance ratio value.Preferably, the ratio of the two-stage resistance value of two stage filter circuit can be 1:1, and the ratio of capacitance can be with
For 1:2.It is may insure that power consumption is more steady on two-stage circuit according to the advantage of such ratio setting, effective power is more than
85%, power time curve fluctuation is not more than 5%.It should be noted that during practical application, it can be according to practical need
The capacitance ratio and resistance ratio in setting filter circuit are sought, is not limited thereto.
In order to further ensure that the safety and reliability of power circuit, monitoring mould can also be set in a power
Block, for monitoring the voltage value of power circuit output end.Optionally, the monitoring modular based on setting in a power, monitoring
The voltage value of power circuit output end then stops providing electric current to driving circuit when voltage value is lower than predetermined voltage threshold.
Wherein, predetermined voltage threshold can be the 66.7% of input terminal input voltage value, if the voltage of output end is lower than
Predetermined voltage threshold, it is understood that there may be the pulse of first control signal is too intensive, and power circuit can stop to driving at this time
Circuit provides electric current, and then realizes the technical effect of protection power source circuit.
The technical solution of the embodiment of the present invention, by the first control for receiving signal input circuit transmission when delay switching circuit
When signal, the pulsewidth of the first control signal is obtained, according to the pulsewidth of the first control signal and default pulse width threshold,
Determine the useful signal sent to driving circuit, so that the driving circuit carries out light filling to camera according to the useful signal,
Solve in the prior art when to camera carry out light filling when, it is higher to power requirement, be unable to control exposure time and power consumption compared with
Big technical problem, realizing light filling circuit can control the duration of exposure, thereby reduce the technical effect of power consumption.
Embodiment two
Fig. 3 is a kind of apparatus structure schematic diagram for camera light filling provided by Embodiment 2 of the present invention, which can be with
There are signal input circuit, display circuit, power circuit and the driving circuit of configuration inside it to realize its specific function.
The device light compensating apparatus includes: that pulsewidth obtains module 310 and supplementary lighting module 320.
Pulsewidth obtains module 310, when for receiving the first control signal of signal input circuit transmission when delay switching circuit,
Obtain the pulsewidth of the first control signal；Supplementary lighting module 320, for according to the pulsewidth of the first control signal and default
Pulse width threshold determines the useful signal sent to driving circuit, so that the driving circuit is according to the useful signal to camera
Carry out light filling.
Based on the above technical solution, the pulsewidth obtains signal 310 described when delay switching circuit receives signal
When the first control signal that input circuit is sent, before the pulsewidth for obtaining the first control signal, it is also used to:
The signal input circuit receives original control signal, and carries out at conversion and shaping to the original control signal
Reason, obtains the first control signal corresponding with the original control signal, and the first control signal is sent to
The delay switching circuit.
Based on the above technical solution, the supplementary lighting module 320 is also used to:
It, then will be corresponding to the default pulse width threshold when the pulsewidth of the first control signal is greater than default pulse width threshold
Duration as effective light filling duration in the useful signal；The useful signal is sent to the driving circuit, so that
The driving circuit carries out light filling to camera according to effective light filling duration in the useful signal.
On the basis of above-mentioned each technical solution, the supplementary lighting module 320 is also used to:
When the pulsewidth of the first control signal is less than default pulse width threshold, then by the pulsewidth of the first control signal
Corresponding duration, as effective light filling duration in the useful signal；The useful signal is sent to the driving electricity
Road, so that the driving circuit carries out light filling to camera according to effective light filling duration in the useful signal.
On the basis of above-mentioned each technical solution, described device is also used to:
When the driving circuit carries out light filling to camera according to the useful signal, the moment luminous intensity of camera reaches just
The 200% of norm formula.
On the basis of above-mentioned each technical solution, described device further include: the power supply electricity being connected with the driving circuit
Road, and the two stage filter circuit being arranged on the power circuit；The output end of the power circuit and the driving circuit
Input terminal be connected, for the driving circuit provide electric current；The two stage filter circuit is defeated by the power circuit
Current value out stores charge, when being used to provide the described driving circuit to camera light filling, required portion of electrical current.
On the basis of above-mentioned each technical solution, described device further include:
The electric motor resistance value ratio of the two stage filter circuit is 1:1, and the ratio of capacitance is 1:2.
On the basis of above-mentioned each technical solution, described device further includes monitoring modular:
Based on the monitoring modular being arranged in the power circuit, the voltage value of the power circuit output end is monitored, when
When the voltage value is lower than predetermined voltage threshold, then stop providing electric current to the driving circuit.
The technical solution of the embodiment of the present invention, by the first control for receiving signal input circuit transmission when delay switching circuit
When signal, the pulsewidth of the first control signal is obtained, according to the pulsewidth of the first control signal and default pulse width threshold,
Determine the useful signal sent to driving circuit, so that the driving circuit carries out light filling to camera according to the useful signal,
Solve in the prior art when to camera carry out light filling when, it is higher to power requirement, be unable to control exposure time and power consumption compared with
Big technical problem, realizing light filling circuit can control the duration of exposure, thereby reduce the technical effect of power consumption.
Device provided by the embodiment of the present invention for camera light filling can be performed provided by any embodiment of the invention
For the method for camera light filling, have the corresponding functional module of execution method and beneficial effect.
It is worth noting that, each unit included by above-mentioned apparatus and module are only divided according to function logic
, but be not limited to the above division, as long as corresponding functions can be realized；In addition, the specific name of each functional unit
Title is also only for convenience of distinguishing each other, and is not intended to restrict the invention the protection scope of embodiment.
Embodiment three
Fig. 4 is a kind of structural schematic diagram for equipment that the embodiment of the present invention three provides.Fig. 4, which is shown, to be suitable for being used to realizing this
The block diagram of the example devices 40 of inventive embodiments embodiment.The equipment 40 that Fig. 4 is shown is only an example, should not be to this
The function and use scope of inventive embodiments bring any restrictions.
As shown in figure 4, equipment 40 is showed in the form of universal computing device.The component of equipment 40 may include but unlimited
In one or more processor or processing unit 401, system storage 402, different system components (including system is connected
Memory 402 and processing unit 401) bus 403.
Bus 403 indicates one of a few class bus structures or a variety of, including memory bus or Memory Controller,
Peripheral bus, graphics acceleration port, processor or the local bus using any bus structures in a variety of bus structures.It lifts
For example, these architectures include but is not limited to industry standard architecture (ISA) bus, microchannel architecture (MAC)
Bus, enhanced isa bus, Video Electronics Standards Association (VESA) local bus and peripheral component interconnection (PCI) bus.
Equipment 40 typically comprises a variety of computer system readable media.These media can be it is any can be by equipment 40
The usable medium of access, including volatile and non-volatile media, moveable and immovable medium.
System storage 402 may include the computer system readable media of form of volatile memory, such as deposit at random
Access to memory (RAM) 404 and/or cache memory 405.Equipment 40 may further include other removable/not removable
Dynamic, volatile/non-volatile computer system storage medium.Only as an example, storage system 406 can be used for read and write can not
Mobile, non-volatile magnetic media (Fig. 4 do not show, commonly referred to as " hard disk drive ").Although not shown in fig 4, Ke Yiti
For the disc driver for being read and write to removable non-volatile magnetic disk (such as " floppy disk "), and to moving non-volatile light
The CD drive of disk (such as CD-ROM, DVD-ROM or other optical mediums) read-write.In these cases, each driver
It can be connected by one or more data media interfaces with bus 403.Memory 402 may include that at least one program produces
Product, the program product have one group of (for example, at least one) program module, these program modules are configured to perform of the invention each
The function of embodiment.
Program/utility 408 with one group of (at least one) program module 407, can store in such as memory
In 402, such program module 407 includes but is not limited to operating system, one or more application program, other program modules
And program data, it may include the realization of network environment in each of these examples or certain combination.Program module 407
Usually execute the function and/or method in embodiment described in the invention.
Equipment 40 can also be logical with one or more external equipments 409 (such as keyboard, sensing equipment, display 410 etc.)
Letter can also enable a user to equipment interact with the equipment 40 with one or more and communicate, and/or with enable the equipment 40
Any equipment (such as network interface card, modem etc.) communicated with one or more of the other calculating equipment communicates.It is this
Communication can be carried out by input/output (I/O) interface 411.Also, equipment 40 can also pass through network adapter 412 and one
A or multiple networks (such as local area network (LAN), wide area network (WAN) and/or public network, such as internet) communication.Such as figure
Shown, network adapter 412 is communicated by bus 403 with other modules of equipment 40.It should be understood that although not shown in fig 4,
Other hardware and/or software module can be used with bonding apparatus 40, including but not limited to: microcode, device driver, at redundancy
Manage unit, external disk drive array, RAID system, tape drive and data backup storage system etc..
Processing unit 401 by the program that is stored in system storage 402 of operation, thereby executing various function application with
And data processing, such as realize the method that camera light filling is used for provided by the embodiment of the present invention.
Example IV
The embodiment of the present invention four also provides a kind of storage medium comprising computer executable instructions, and the computer can be held
Row instruction by computer processor when being executed for executing the method for being used for camera light filling.
The computer storage medium of the embodiment of the present invention, can be using any of one or more computer-readable media
Combination.Computer-readable medium can be computer-readable signal media or computer readable storage medium.It is computer-readable
Storage medium for example may be-but not limited to-the system of electricity, magnetic, optical, electromagnetic, infrared ray or semiconductor, device or
Device, or any above combination.The more specific example (non exhaustive list) of computer readable storage medium includes: tool
There are electrical connection, the portable computer diskette, hard disk, random access memory (RAM), read-only memory of one or more conducting wires
(ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disc read-only memory (CD-
ROM), light storage device, magnetic memory device or above-mentioned any appropriate combination.In this document, computer-readable storage
Medium can be any tangible medium for including or store program, which can be commanded execution system, device or device
Using or it is in connection.
Computer-readable signal media may include in a base band or as carrier wave a part propagate data-signal,
Wherein carry computer-readable program code.The data-signal of this propagation can take various forms, including but unlimited
In electromagnetic signal, optical signal or above-mentioned any appropriate combination.Computer-readable signal media can also be that computer can
Any computer-readable medium other than storage medium is read, which can send, propagates or transmit and be used for
By the use of instruction execution system, device or device or program in connection.
The program code for including on computer-readable medium can transmit with any suitable medium, including --- but it is unlimited
In wireless, electric wire, optical cable, RF etc. or above-mentioned any appropriate combination.
Can with one or more programming languages or combinations thereof come write for execute the embodiment of the present invention operation
Computer program code, described program design language include object oriented program language-such as Java,
Smalltalk, C++ further include conventional procedural programming language --- such as " C " language or similar program design language
Speech.Program code can be executed fully on the user computer, partly be executed on the user computer, as an independence
Software package execute, part on the user computer part execute on the remote computer or completely in remote computer or
It is executed on server.In situations involving remote computers, remote computer can pass through the network of any kind --- packet
It includes local area network (LAN) or wide area network (WAN)-is connected to subscriber computer, or, it may be connected to outer computer (such as benefit
It is connected with ISP by internet).
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of method for camera light filling characterized by comprising
When delay switching circuit receives the first control signal of signal input circuit transmission, the arteries and veins of the first control signal is obtained
It is wide；
According to the pulsewidth of the first control signal and default pulse width threshold, the useful signal sent to driving circuit is determined,
So that the driving circuit carries out light filling to camera according to the useful signal.
2. the method according to claim 1, wherein described when delay switching circuit receives signal input circuit hair
When the first control signal sent, before the pulsewidth for obtaining the first control signal, further includes:
The signal input circuit receives original control signal, and carries out conversion and Shape correction to the original control signal,
It obtains the first control signal corresponding with the original control signal, and the first control signal is sent to described
Delay switching circuit.
3. the method according to claim 1, wherein the pulsewidth according to the first control signal and pre-
If pulse width threshold, the useful signal sent to driving circuit is determined, so that the driving circuit is according to the useful signal to phase
Machine carries out light filling, comprising:
When the pulsewidth of the first control signal is greater than default pulse width threshold, then by corresponding to the default pulse width threshold when
Length is as effective light filling duration in the useful signal；
The useful signal is sent to the driving circuit, so that the driving circuit is according to effective in the useful signal
Light filling duration carries out light filling to camera.
4. the method according to claim 1, wherein the pulsewidth according to the first control signal and pre-
If pulse width threshold, the useful signal sent to driving circuit is determined, so that the driving circuit is according to the useful signal to phase
Machine carries out light filling, comprising:
It is when the pulsewidth of the first control signal is less than default pulse width threshold, then the pulsewidth institute of the first control signal is right
The duration answered, as effective light filling duration in the useful signal；
The useful signal is sent to the driving circuit, so that the driving circuit is according to effective in the useful signal
Light filling duration carries out light filling to camera.
5. the method according to claim 3 or 4, which is characterized in that further include:
When the driving circuit carries out light filling to camera according to the useful signal, the moment luminous intensity of camera reaches normal mode
The 200% of formula.
6. the method according to claim 1, wherein further include: the power supply electricity being connected with the driving circuit
Road, and the two stage filter circuit being arranged on the power circuit；
The output end of the power circuit is connected with the input terminal of the driving circuit, for providing electricity to the driving circuit
Stream；
The two stage filter circuit stores charge by the current value that the power circuit exports, and is used to provide the described driving circuit
When to camera light filling, required portion of electrical current.
7. according to the method described in claim 6, it is characterised by comprising:
The electric motor resistance value ratio of the two stage filter circuit is 1:1, and the ratio of capacitance is 1:2.
8. according to the method described in claim 6, it is characterized by further comprising:
Based on the monitoring modular being arranged in the power circuit, the voltage value of the power circuit output end is monitored, when described
When voltage value is lower than predetermined voltage threshold, then stop providing electric current to the driving circuit.
9. a kind of device for camera light filling characterized by comprising
Pulsewidth obtains module, when for receiving the first control signal of signal input circuit transmission when delay switching circuit, obtains institute
State the pulsewidth of first control signal；
Supplementary lighting module is determined and is sent out to driving circuit for the pulsewidth and default pulse width threshold according to the first control signal
The useful signal sent, so that the driving circuit carries out light filling to camera according to the useful signal.
10. device according to claim 9, which is characterized in that module is obtained in the pulsewidth, for working as in limited time described
When circuit receives the first control signal of signal input circuit transmission, before the pulsewidth for obtaining the first control signal, also
For:
The signal input circuit receives original control signal, and carries out conversion and Shape correction to the original control signal,
It obtains the first control signal corresponding with the original control signal, and the first control signal is sent to described
Delay switching circuit.
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| CN109743509B (en) | 2021-01-05 |
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