CN106658860B - A kind of the light source drive control circuit and method of imaging sensor - Google Patents
A kind of the light source drive control circuit and method of imaging sensor Download PDFInfo
- Publication number
- CN106658860B CN106658860B CN201710018293.XA CN201710018293A CN106658860B CN 106658860 B CN106658860 B CN 106658860B CN 201710018293 A CN201710018293 A CN 201710018293A CN 106658860 B CN106658860 B CN 106658860B
- Authority
- CN
- China
- Prior art keywords
- chip
- output
- group
- light
- configuration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000003384 imaging method Methods 0.000 title claims abstract description 37
- 238000010586 diagram Methods 0.000 description 12
- 125000004122 cyclic group Chemical group 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000003760 hair shine Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
Landscapes
- Facsimile Heads (AREA)
- Stroboscope Apparatuses (AREA)
Abstract
The present invention discloses a kind of the light source drive control circuit and method of imaging sensor.The circuit includes：First chip and first luminous group are organized and are driven after configuration is complete before the i-th output of the first chip configuration and continue the preceding group of the 1st output of configuration after the completion of the i-th light-emitting component and the first chip drives m light-emitting components；Second chip and second luminous group are organized and are driven after configuration is complete after the i-th output of the second chip configuration and continue group after configuration the 1st exports after the completion of the i-th luminescent device and the second chip drives m luminescent devices；When first the i-th light-emitting component of chip drives, group and when second the i-th luminescent device of chip drives after the i-th output of the second chip configuration, if i<M, then group before the first chip configuration i+1 exports；If i=m, group before the 1st output of the first chip configuration；M is the integer more than or equal to 1, i=1,2 ... m.By using said program, output group setup time can be saved, promotes Image Acquisition speed.
Description
Technical field
The present invention relates to LED illumination control technology field more particularly to a kind of light source drive control electricity of imaging sensor
Road and method.
Background technology
With the development of economy, the circulation of bank note is increasing, and ATM (Automatic Teller Machine, automatically
Cash dispenser) etc. financial self-service equipments application, save a large amount of human resources, greatly improve working efficiency.In finance
Module for recognizing paper money, i.e. currency checking module are designed in self-service device.There are one most important component parts in currency checking module, are exactly
Imaging sensor, can acquire to be visible with the naked eye on bank note by imaging sensor and carry out banknote with invisible image information
False distinguishing identifies.
It is broadly divided into two parts using imaging sensor：Light source igniting and Image Acquisition, light source igniting refer to driving figure
As the LED light source on sensor, Image Acquisition is carried out by bright light source.For different bank note, anti-counterfeiting characteristic is corresponding
Light source type and light-source brightness difference, therefore there are many light sources in imaging sensor.In the prior art, multichannel is usually used
Constant current source chip controls plurality of LED light sources, and the process controlled is before lighting LED light source every time to constant current source chip
It is configured, bright light source is put after the completion of configuration, to obtain required light source type and brightness.The work of multiple constant current source chip
Process is exactly ceaselessly to configure light source to put bright light source again, is so recycled.
However, in the light source control proces of conventional images sensor, multiple constant current source chip loop configuration light source is lighted again
Light source, setup time have accounted for the half of light source control time, cause Image Acquisition efficiency low, restrict money-checking speed and are promoted.
Invention content
In view of this, the purpose of the present invention is to propose to the light source drive control circuit and method of a kind of imaging sensor, with
The light source drive control mode for improving existing constant-current source, improves the Image Acquisition efficiency of imaging sensor.
To achieve the above object, the present invention adopts the following technical scheme that：
In a first aspect, an embodiment of the present invention provides a kind of light source drive control circuits, including：
First chip and first luminous group, first chip include group before group is exported to m before the 1st output, and described the
One group that shines includes the 1st light-emitting component to m light-emitting components, and each output end is electric with the i-th light-emitting component in group before the i-th output
Connection is organized before the first chip configuration i-th output and drives i-th light-emitting component, Yi Jisuo after configuration is complete
M light-emitting components described in the first chip drives are stated to continue to configure the preceding group of the 1st output after the completion；
Second chip and second luminous group, second chip include group after group is exported to m after the 1st output, and described the
Two groups that shine include the 1st luminescent device to m luminescent devices, and each output end is electric with the i-th luminescent device in group after the i-th output
Connection is organized after the second chip configuration i-th output and drives i-th luminescent device, Yi Jisuo after configuration is complete
State group after continuing to configure the 1st output after the completion of m luminescent devices described in the second chip drives；
Described in first chip drives when the i-th light-emitting component, group after the second chip configuration i-th output, with
And when i-th luminescent device of the second chip drives,
If i<M, then group before the first chip configuration i+1 exports；
If i=m, group before the 1st output of the first chip configuration；
Wherein, m is the integer more than or equal to 1, i=1,2 ..., m.
Further, the period of the i-th light-emitting component described in first chip drives and the second chip drives institute
The period for stating the i-th luminescent device do not overlap and second chip configure after i-th output period for organizing with it is described
The period of i-th light-emitting component described in first chip drives is overlapped.
Further, the period of the i-th light-emitting component described in first chip drives and the second chip drives institute
The period for stating the i-th luminescent device do not overlap and second chip configure after i-th output period for organizing with it is described
It is overlapping that first chip configures the period organized before i-th output.
Further, the period of the i-th light-emitting component described in first chip drives and the second chip drives institute
The period for stating the i-th luminescent device do not overlap and second chip configure after i-th output period for organizing with it is described
It is overlapping that first chip configures the period organized before the i+1 output.
Further, first chip is the first constant current source chip, and second chip is the second constant current source chip.
Further, the light-emitting component and the luminescent device are LED light.
Further, the maximum operating currenbt of the maximum output current and i-th light-emitting component organized before i-th output
It is equal；The maximum output current organized after i-th output is equal with the maximum operating currenbt of the i-th luminescent device.
Further, in group before any one output, the output current of each port is identical in group before the output；
For in group after any one output, the output current of each port is identical in group after the output.
Second aspect, an embodiment of the present invention provides a kind of light source drive control methods, including：
It is organized before the i-th output of first chip configuration and drives the i-th light-emitting component and first chip after configuration is complete
The m light-emitting components are driven to continue group before the 1st output of configuration after the completion；
Group after the i-th output of second chip configuration, and the i-th luminescent device and second core are driven after configuration is complete
Piece continues group after the 1st output of configuration after the completion of driving the m luminescent devices；
Described in first chip drives when the i-th light-emitting component, group after the second chip configuration i-th output, with
And when i-th luminescent device of the second chip drives,
If i<M, then group before the first chip configuration i+1 exports；
If i=m, group before the 1st output of the first chip configuration；
Wherein, m is the integer more than or equal to 1, i=1,2 ..., m.
Further, described in first chip drives when the i-th light-emitting component, the second chip configuration described i-th is defeated
When going out rear group and i-th luminescent device of the second chip drives, group includes before the first chip configuration i+1 output：
The period of i-th light-emitting component described in first chip drives shines with described in second chip drives i-th
The period of device does not overlap and second chip configures the period organized after i-th output and first chip
The period of i-th light-emitting component is driven to be overlapped.
A kind of light source driving circuit provided in an embodiment of the present invention and method, in first the i-th light-emitting component of chip drives,
Group after the i-th output of second chip configuration, and in second the i-th light-emitting component of chip drives, the first chip configures i+1 output
Preceding group.By using above-mentioned technical proposal, configured before the 1st output after group, in light-emitting component or luminescent device in the first chip
It is total that there are one driven.Therefore, the setup time that light-emitting component and luminescent device can be saved, without according to first configuring simultaneously
After having driven light-emitting component, it is reconfigured and the sequence of luminescent device is driven to be driven successively to all light sources, and then can carry
Rise the speed of Image Acquisition.
Description of the drawings
Exemplary embodiments of the present invention will be described in detail referring to the drawings by general below, makes those skilled in the art
The above-mentioned and other feature and advantage for becoming apparent from the present invention, in attached drawing：
Fig. 1 is a kind of schematic diagram of the control circuit for light source for imaging sensor that the prior art provides；
Fig. 2 is a kind of schematic diagram for light source drive control method that the prior art provides；
Fig. 3 is a kind of structure diagram of the light source drive control circuit for imaging sensor that the embodiment of the present invention one provides；
Fig. 4 is a kind of light source drive control circuit signal of preferred imaging sensor provided by Embodiment 2 of the present invention
Figure；
Fig. 5 a are a kind of light source drive control flow chart of imaging sensor provided by Embodiment 2 of the present invention；
Fig. 5 b are a kind of sequence diagram of the light source drive control of imaging sensor provided by Embodiment 2 of the present invention；
Fig. 6 a are the light source drive control flow chart of another imaging sensor provided by Embodiment 2 of the present invention；
Fig. 6 b are the sequence diagram of the light source drive control of another imaging sensor provided by Embodiment 2 of the present invention；
Fig. 7 a are the light source drive control flow chart of another imaging sensor provided by Embodiment 2 of the present invention；
Fig. 7 b are the sequence diagram of the light source drive control of another imaging sensor provided by Embodiment 2 of the present invention；
Fig. 8 is a kind of flow chart of the light source drive control method for imaging sensor that the embodiment of the present invention three provides.
Specific implementation mode
Technical solution to further illustrate the present invention below with reference to the accompanying drawings and specific embodiments.It is appreciated that
It is that specific embodiment described herein is used only for explaining the present invention rather than limitation of the invention.It further needs exist for illustrating
, only the parts related to the present invention are shown for ease of description, in attached drawing rather than entire infrastructure.
In the prior art, currency checking module identifies that a piece of paper coin generally requires 4 kinds of imaging sensor acquisition or more and do not share the same light
The image in source is illustrated by taking 4 kinds of light sources as an example below, and wherein the configuration level of each light source includes 0 grade and 1 grade.
Fig. 1 is a kind of schematic diagram of the control circuit for light source for imaging sensor that the prior art provides；Fig. 2 is one that the prior art provides
The schematic diagram of kind light source drive control method.
As shown in Figure 1, multiple constant current source chip have multiple output port OUT0-OUT15, and also with 4 kinds of light source led-A
~LED-D is electrically connected, and configuration light source refers to the corresponding output port of configuration light source, and output port is configured to 1 and characterizes output end
Mouthful output current and then corresponding light source can be driven, output port is configured to 0 and characterizes output port output current is not in turn
Corresponding light source can not be driven.If desired drive LED-A, then need first by the corresponding OUT0-OUT3 of LED-A be configured to 1 and
The corresponding each output port of other light sources is configured to 0；And when needing to drive LED-B, then firstly the need of LED-B is corresponding
OUT4-OUT7 is configured to 1 and the corresponding each output port of other light sources is configured to 0；And so on, in the same fashion
Configure in order and drive LED-C and LED-D.
Since the light source type lighted every time is all different, drive the process configured when each LED that can not all save
Slightly, the control mode of LED can only be realized according to configuration plus driving, the process of the constant-current source chip operation of conventional images sensor
It is exactly that ceaselessly configuration light source and point bright light source, such cycle, therefore the lighting control mode of constant-current source lead to figure acquisition effect
Rate is low, restricts money-checking speed and is promoted.
Embodiment one
Fig. 3 is a kind of structure diagram of the light source drive control circuit for imaging sensor that the embodiment of the present invention one provides.
The circuit can be integrated in the finance devices such as ATM (Automatic Teller Machine, ATM) for bank note
Image is acquired, and can also be applied to other image recognition apparatus such as scanner or duplicator.As shown in figure 3, the circuit 100 wraps
It includes：Luminous group 220 of first chip 110, first the 120, second chip 210 and second of luminous group.
Wherein, including being organized before the 1st output, 111 to m outputs are preceding to organize 11m to the first chip 110.First luminous group 120 includes
1st light-emitting component 121 is to m light-emitting components 12m.Each output end is electric with the i-th light-emitting component 12i in group 11i before i-th output
Connection.11i is organized before the i-th output of first chip 110 configuration and drives the i-th light-emitting component 12i and the first core after configuration is complete
Continue to organize 111 before configuring the 1st output after the completion of piece driving m light-emitting components 12m.
It should be noted that each light-emitting component is by before driving, the first chip is required for pair being electrically connected with light-emitting component
The output port connect is configured (driving current for configuring light source), and the process of configuration is the regular book according to constant current source chip
After to input pin in input signals so that the process of the exportable driving current of output port.After configuration is complete, just may be used
Light-emitting component is driven, wherein the different light-emitting components that the output end organized before being exported with the first chip is electrically connected cannot be same
Shi Jinhang is configured.Simultaneously as the light source type representated by each light-emitting component is different, in paper money recognition, difference shines first
Part may only acquire 1 row image every time, therefore different light-emitting components can only be according to being driven when by driving (lighting) successively
Mode, and cannot simultaneously be driven.So for different light-emitting components be all according to first be its configuration driven electric current again into
The order of row driving carries out successively.
Obviously, the first chip drives according to the 1st light-emitting component to the clooating sequence of m light-emitting components into line light source, and
After the first chip drives complete m light-emitting components, group keeps configuration completion subsequent continuous to the 1st before being then returned to the 1st output of configuration
Light-emitting component is driven, and is so recycled.The benefit being arranged in this way exists：Can be different light-emitting components by way of loop control
It configures in order driving current and is driven successively, to obtain required light source type and brightness.
Wherein, including organizing 21m after 211 to m output of group after the 1st output, second luminous group 220 includes the second chip 210
1st luminescent device 221 is to m luminescent device 22m, and each output end is electric with the i-th luminous 22i devices in group 21i after the i-th output
Connection organizes 21i after the i-th output of the second chip 210 configuration and drives the i-th luminescent device 22i and the second core after configuration is complete
Piece 210 continues to organize 211 after configuration the 1st exports after the completion of driving m luminescent devices 22m.
It should be noted that cannot be same for the different luminescent devices for the output end electrical connection organized after being exported from the second chip
Shi Jinhang is configured, and can not be carried out at the same time driving.The configuration of luminescent device and driving process are identical as light-emitting component, be all according to
The sequence that first configuration driven electric current is driven again successively drives each luminescent device, when m photophores are completed in driving
After part, continues to return to the 1st luminescent device of configuration, the 1st luminescent device is driven after configuration is complete, and then can also be formed
One cyclic control system.
When first chip 110 drives the i-th light-emitting component 12i, 21i, Yi Ji are organized after the i-th output of the second chip 210 configuration
When two chips 210 drive the i-th luminescent device 22i,
If i<M then organizes 11 (i+1) before the first chip 110 configuration (i+1) output；
If i=m, group 111 before the 1st output of the first chip 110 configuration；
Wherein, m is the integer more than or equal to 1, i=1,2 ..., m.
Significantly, since the light source type representated by light source is different, no matter therefore the light source whether with same core
The output group of piece is electrically connected, and different light sources cannot all be carried out at the same time driving.But be electrically connected with group before the output of the first chip
Light-emitting component can be carried out at the same time configuration when being driven, with the luminescent device being electrically connected is organized after the output of the second chip.For example, working as
When the first 1 light-emitting component of chip drives, group after configurable 1st output of the second chip, the 1st luminescent device of the second chip drives
When, group before the 2nd output of the first chip configuration.Since the drive control process of the first chip and the second chip is all a cycle control
Process processed, for the second chip when driving the last one luminescent device, the first chip is initially configured group before the 1st output again.So logical
It crosses two cycles of control and starts the time executed, the time portion that can recycle two is overlapped, and then can save light-emitting component
Or the setup time of luminescent device, improve the efficiency of Image Acquisition.
Illustratively, the first chip and the second chip are preferably constant current source chip, and concrete model can be used
TLC5941.Preferably, the first chip and the second chip can be the chip of same model, or with a series of difference
Chip.Illustratively, luminous original paper and luminescent device are preferably LED light or other light emitting diodes.
Since the driving current configured by different light sources is of different sizes, in different light-emitting components and group before output
All it is according to different light-emitting components or luminescent device itself when electrical connection or when different luminescent devices are electrically connected with group after output
What maximum operating currenbt was attached.And during light source is driven, then it is to be matched for different light sources according to actual demand
Set different grades of driving current.
Illustratively, the maximum of the maximum output current and the i-th light-emitting component organized before the i-th output of the first constant current source chip
Operating current is equal；The maximum functional of the maximum output current and the i-th luminescent device organized after i-th output of the second constant current source chip
Electric current is equal.For in group before any one output, the output current of each port is identical in group before the output；For any one
After a output in group, the output current of each port is identical in group after the output.
Specifically, if the maximum operating currenbt of LED-A lamps is 240mA, the first of the first constant current source chip exports preceding group
It may include four output ends, this four output ends are all electrically connected with LED-A lamps, and the electric current of each output end is 60mA.
In actual application, in the case where driving current is no more than 240mA, the work of LED-A lamps can be adjusted according to actual demand
Make electric current.For example, if the operating current that LED-A lamps need to configure is 200mA, first exports the electricity of the preceding each output end organized
Stream is 50mA.
Specifically, group may also comprise six output ends before the first output of the first constant current source chip, this six output ends
It is all electrically connected with LED-A lamps, and the electric current of each output end is 40mA.Exemplary, the electric current of six output ends can not also
It is identical, but the sum of its output current is equal to the maximum operating currenbt of LED-A.Preferably, according to TLC5941 chips as constant current
Source, then the ranging from 0-60mA of every road output current of the chip, exports per road and can configure 63 different brackets.For not using
Chip output, then the grade of output current can be configured to 0, indicate this output end not output current.
A kind of light source drive control circuit that the embodiment of the present invention one provides, in first the i-th light-emitting component of chip drives,
Group after the i-th output of second chip configuration, and in second the i-th light-emitting component of chip drives, the first chip configures i+1 output
Preceding group.By using above-mentioned technical proposal, configured before the 1st output after group, in light-emitting component or luminescent device in the first chip
It is total that there are one driven.Therefore, the setup time that light-emitting component and luminescent device can be saved, without according to first configuring simultaneously
After having driven light-emitting component, it is reconfigured and the sequence of luminescent device is driven to be driven successively to all light sources, and then can carry
Rise the speed of Image Acquisition.
Embodiment two
Fig. 4 is a kind of light source drive control circuit signal of preferred imaging sensor provided by Embodiment 2 of the present invention
Figure.The present embodiment is specifically illustrated by taking 4 road light sources as an example.As shown in figure 4, the circuit 200 includes the first constant current source chip U1,
First luminous group 230 of luminous group the 220, second constant current source chip U2 and second.
Wherein, the first constant current source chip U1 includes group 222 before preceding the 221 and the 2nd output of group of the 1st output.Wherein, the 1st output
Preceding group 221 includes tetra- output ends of 7-10, and group 222 includes tetra- output ends of 11-14 before the 2nd output.First luminous group includes the 1st
Light-emitting component LED-A and the 2nd light-emitting component LED-B.Wherein, LED-A is electrically connected with four output ends in group 221 before the 1st output
It connects, LED-B is electrically connected with four output ends in group 222 before the 2nd output.
Second constant current source chip U2 after the 231 and the 2nd output of group after the 1st output including organizing 232.Wherein, group after the 1st output
231 include tetra- output ends of 7-10, and group 232 includes tetra- output ends of 11-14 after the 2nd output.Second luminous group includes the 1st luminous
Device LED-C and the 2nd luminescent device LED-D.Wherein, LED-C is electrically connected with four output ends in group 231 after the 1st output,
LED-D is electrically connected with four output ends in group 232 after the 2nd output.
It is as follows that the present embodiment proposes a kind of preferred embodiment of light source drive control on the basis of the above embodiments：
The period of first the i-th light-emitting component of chip drives and the period of second the i-th luminescent device of chip drives do not overlap, Yi Ji
The period organized after the i-th output of two chips configuration is Chong Die with the period of first the i-th light-emitting component of chip drives.
Illustratively, Fig. 5 a are a kind of light source drive control flow of imaging sensor provided by Embodiment 2 of the present invention
Figure.As shown in Figure 5 a, it is organized before the 1st output of the first constant current source chip configuration and drives LED-A after configuration is complete.In driving LED-
While A, group after the 1st output of the second constant current source chip configuration, the first constant current source chip continues to configure after LED-B is completed in driving
Group before 1st output, the second constant current source chip group after continuing the 1st output of configuration after LED-D is completed in driving.Fig. 5 b are that the present invention is real
A kind of sequence diagram of the light source drive control of imaging sensor of the offer of example two is provided.
As shown in Figure 5 b, initial time is set as t1,
In (t1~t2) period, group before the 1st output of the first constant current source chip configuration (shown in FIG as P11)；
In (t2~t3) period, the first constant current source chip configures into and drives LED-A (shown in FIG as Q-A), together
When, group after the 1st output of the second constant current source chip configuration (shown in FIG as P21)；
In (t3~t4) period, group (shown in FIG as P12) before the 2nd output of the first constant current source chip configuration, meanwhile,
Second constant-current source chip drives LED-C (shown in FIG as Q-C)；
In (t4~t5) period, the configuration of the first constant-current source chip drives is completed and driving LED-B is (shown in FIG as Q-
B), meanwhile, the second constant current source chip configures group after the 2nd output (shown in FIG as P22)；
In (t5~t6) period, group (shown in FIG as P11) before the 1st output of the first constant current source chip configuration, meanwhile,
Second constant-current source chip drives LED-D (shown in FIG as Q-D)；
In (t6~t7) period, the first constant current source chip configures into and drives LED-A (shown in FIG as Q-A), together
When, group after the 1st output of the second constant current source chip configuration (shown in FIG as P21).
Obviously, (t5~t6) period have begun execute cyclic process.In the order described above, different light sources will be by successively
Driving.It can to configure into before the 1st output after group in the first constant current source chip by above-mentioned setting, total there are one at light source
In driven state, therefore the driving time of light source can be reduced, improve Image Acquisition efficiency.
Specifically, if per second need 4000 row images of acquisition to be differentiated, the time of often row acquisition is 1/4000 second.If
It is acquired using 4 LED light, each LED light can acquire 1 row image every time, then need circle collection 1000 times.If first
It is 1/8000 second that constant current source chip, which configures group and the second constant-current source before each output and configures the time organized after each output, due to
There is LED light to be driven always after group before the 1st output of the first constant current source chip configuration for the first time, therefore, in entire cycle,
The sum of driving time of LEDA, LEDB, LEDC and LEDD is [1/4000-1/ (the 8000*1000)] second, you can is approximately equal to 1/
4000 seconds, one times was at least improved on the basis of existing technology.It therefore, can be by using above-mentioned Two-way Cycle drive control
The time that group is organized after being exported with the 2nd after the second chip configuration the 1st exports, Jin Erti are saved on the basis of existing drive control method
The collecting efficiency of hi-vision.
The present embodiment proposes the preferred embodiment of another light source drive control such as on the basis of the above embodiments
Under：The period of first the i-th light-emitting component of chip drives and the period of second the i-th luminescent device of chip drives do not overlap, with
And second to configure the period organized before i-th output with the first chip overlapping period for organizing after the i-th output of chip configuration.
Illustratively, Fig. 6 a are the light source drive control flow of another imaging sensor provided by Embodiment 2 of the present invention
Figure.As shown in Figure 6 a, before the 1st output of the first constant current source chip configuration during group, the second constant current source chip is initially configured the 1st
Group after output.After the completion of the first constant-current source chip drives LED-A, it is initially configured group before the 2nd output, at this point, the second constant-current source
Chip starts to drive LED-C, after the completion of driving, then configures group after the 2nd output.When the configuration the 2nd of the second constant current source chip is defeated
During going out rear group, the first constant-current source chip drives LED-B is then returned to the 1st output of configuration after the completion of LED-B drives
Preceding group, and then a driving cyclic control system can be formed.After the completion of the second constant-current source chip drives LED-D, then return
Group after configuration the 1st exports is returned, and then a driving cyclic control system can also be formed.Fig. 6 b be second embodiment of the present invention provides
Another imaging sensor light source drive control sequence diagram.
As shown in Figure 6 b, initial time is set as t1,
In (t1~t3) period, group before the 1st output of the first constant current source chip configuration (shown in FIG as P11)；At this
Between in section, the second constant current source chip is in t2Moment is initially configured group after the 1st output (shown in FIG as P21).As described in Fig. 6 b,
The period organized after the 1st output of second constant current source chip configuration is (t2~t4), and with period (t1~t3) generate it is overlapping,
Overlapping part is (t2~t3)；
In (t3~t4) period, the first constant current source chip configures into and drives LED-A (shown in FIG as Q-A), this
When, the second constant current source chip group still after the 1st output of configuration；
In (t4~t6) period, group (shown in FIG as P12) before the 2nd output of the first constant current source chip configuration, at this moment
Between in section, the period of the second constant-current source chip drives LED-C (shown in FIG as Q-C), driving LED-C are (t4~t5)；
Simultaneously in (t4~t6) in the period, the second constant current source chip is in t5Group (is being schemed after moment is initially configured the 2nd output
In be expressed as P22), period for organizing is (t after the 2nd output of the second constant current source chip configuration5~t7), with (t4~t6) generate friendship
The folded period is (t5~t6)；
In (t7~t9) period, group before the 1st output of the first constant current source chip configuration, while in (t7~t8) period, the
Two constant current source chips configure LED-D (Q-D is expressed as in figure), it is clear that (t7~t9) the first constant current of period source chip starts to hold again
The above-mentioned cyclic process of row.
According to above-mentioned control mode, period and the i-th output of the first chip configuration organized after the i-th output of the second chip configuration
Preceding group of period always will produce overlapping.The advantages of this arrangement are as follows can be in the base of the prior art (Fig. 2 drive controls method)
Shorten the setup time organized after the i-th output on plinth, and then promotes the collecting efficiency of image.
The present embodiment proposes the preferred embodiment of another light source drive control such as on the basis of the above embodiments
Under：The period and the period of the i-th luminescent device described in the second chip drives of first the i-th light-emitting component of chip drives do not hand over
The period organized after the i-th output of folded and the second chip configuration and the period organized before the configuration i+1 output of the first chip hand over
It is folded.
Illustratively, Fig. 7 a are the light source drive control flow of another imaging sensor provided by Embodiment 2 of the present invention
Figure.As described in Fig. 7 a, for the first constant current source chip during driving LED-A, the second constant current source chip is initially configured the 1st output
Group afterwards, after the completion of LED-A drivings, the first constant current source chip then configures group before the 2nd output, in the process, the second constant current
Source chip starts to drive LED-C.After the completion of LED-C drivings, the second constant current source chip then configures group after the 2nd output.When
After the completion of one constant-current source chip drives LED-B, continues group before returning to the 1st output of configuration and forms a driving cyclic control system,
After the completion of the second constant-current source chip drives LED-D, continue to return to group after configuration the 1st exports, also forms a driving cycle control
System processed.Fig. 7 b are the sequence diagram of the light source drive control of another imaging sensor provided by Embodiment 2 of the present invention.
As shown in Figure 7b, initial time is set as t1,
In (t1~t2) period, group before the 1st output of the first constant current source chip configuration (shown in FIG as P11)；
In (t2~t3) period, the first constant current source chip configures into and drives LED-A (shown in FIG as Q-A), together
When, the second constant current source chip configures group (shown in FIG as P21) after the 1st output, and the period organized after the 1st output of configuration is
In (t2~t4)；
In (t3~t5) period, group (shown in FIG as P12) before the 2nd output of the first constant current source chip configuration, such as Fig. 7 b
It is described, organized after the 2nd output of period and the second constant current source chip configuration organized before the 2nd output of the first constant current source chip configuration when
Between section to generate overlapping, the overlapping period be (t3~t4)；Meanwhile in (t3~t5) in the period, the second constant current source chip exists
t4Moment starts to drive LED-C (shown in FIG as Q-C), and it is (t to drive the period of LED-C4~t5)；
In (t5~t6) period, the configuration of the first constant-current source chip drives is completed and driving LED-B is (shown in FIG as Q-
B), meanwhile, the second constant current source chip configures group (shown in FIG as P22) after the 2nd output, and the period configured is (t5~
t7)；
In (t6~t8) period, group (shown in FIG as P11) such as Fig. 7 b before the 1st output of the first constant current source chip configuration
It is shown, after the 2nd output of the second constant current source chip configuration period for organizing and organized before the 1st output of the first constant current source chip configuration when
Between section to generate overlapping, the overlapping period be (t6~t7), meanwhile, in (t6~t8) period, the second constant-current source chip drives
The period of LED-D (shown in FIG as Q-D), driving are (t7~t8)；
Obviously, (t6~t8) period have begun execute cyclic process.In the order described above, different light sources will be by successively
Driving, and the period organized after the i-th output of the second chip configuration and the period organized before the configuration i+1 output of the first chip are always
It is overlapping.The advantages of this arrangement are as follows organized after can also reducing by the i-th output on the basis of prior art drive control method
Setup time promotes the collecting efficiency of image.
The embodiment of the present invention two based on above-described embodiment, first the i-th light-emitting component of chip drives period with
In the case of the period of i-th luminescent device described in second chip drives is nonoverlapping, by controlling the 1st output of the second chip configuration
Group starts the time executed afterwards, and the loop control process of the second chip drives luminescent device can be made to be sent out with the first chip drives
The loop control process of optical element generates overlapping (or overlapping), therefore organizes matching for driving current after can reducing the output of the second chip
The time is set, to improve the collecting efficiency to image.
Embodiment three
Fig. 8 is a kind of flow chart of the light source drive control method for imaging sensor that the embodiment of the present invention three provides, should
Method can be executed by light source drive control circuit, which can be realized by way of software and/or hardware.With reference to figure
8, the present embodiment specifically comprises the following steps：
It is organized before step 1, the i-th output of the first chip configuration and drives the i-th light-emitting component and the first core after configuration is complete
Continue the preceding group of the 1st output of configuration after the completion of piece driving m light-emitting components.
Wherein, light-emitting component and the preceding connection relation organized of the first chip output can refer to content described in embodiment one,
Details are not described herein again.It is also then to drive again luminous according to being first light-emitting component configuration driven electric current when lighting light-emitting component
What the sequence of element carried out successively.After all light-emitting components are all completed to drive for the first time, continue group before the 1st output of configuration,
Configuration completes rear-guard and moves the 1st light-emitting component.It recycles execution successively according to above-mentioned steps, has to the last acquired the image of setting.
Group after step 2, the i-th output of the second chip configuration, and the i-th luminescent device and second are driven after configuration is complete
Continue group after configuration the 1st exports after the completion of chip drives m luminescent devices.When first the i-th light-emitting component of chip drives, the second core
Group and when second the i-th luminescent device of chip drives after the i-th output of piece configuration,
If i<M, then group before the first chip configuration i+1 exports；
If i=m, group before the 1st output of the first chip configuration；
Wherein, m is the integer more than or equal to 1, i=1,2 ..., m.
Wherein, after the output of the second chip the configuration process organized and with driving that the luminescent device being electrically connected is organized after output
Journey is identical as the first chip, specifically can refer to the driving process of the configuration process and light-emitting component organized before the output of the first chip,
Details are not described herein again.
It should be noted that by controlling, the second chip configures the period organized after i outputs and the first chip drives i shines
After the period generation of element overlaps, the picking rate of image can be promoted.
Preferably, the time of the period of first the i-th light-emitting component of chip drives and second the i-th luminescent device of chip drives
Section do not overlap and the i-th output of the second chip configuration after period of period and first the i-th light-emitting component of chip drives for organizing
Overlapping.The advantages of this arrangement are as follows the time of Image Acquisition may make at least to promote one times, and then can be exposed meeting image
While between light time, the recognition speed of image is improved.
Specifically, if the driving time (i.e. the time for exposure of image) of light source requires to be T, in existing scheme, acquisition is schemed
The between-line spacing time of picture is 2T (configure and be driven apart execution).If there is 4000 row images need to acquire, then a piece of paper is identified
The time of coin is 8000T.And the method provided by using the embodiment of the present invention, due to configure and drive can simultaneously into
Row, therefore identify that the between-line spacing time of 4000 row images is also 4000T, speed improves one times.
The embodiment of the present invention three provides a kind of light source drive control method, in first the i-th light-emitting component of chip drives,
Group after the i-th output of second chip configuration, and in second the i-th light-emitting component of chip drives, the first chip configures i+1 output
Preceding group.By using above-mentioned technical proposal, configured before the 1st output after group, in light-emitting component or luminescent device in the first chip
It is total that there are one driven.Therefore, the setup time that light-emitting component and luminescent device can be saved, without according to first configuring simultaneously
After having driven light-emitting component, it is reconfigured and the sequence of luminescent device is driven to be carried out successively to all light-emitting components and luminescent device
Driving.Allow the speed of Image Acquisition to promote one times, in the identification process of bank note, is effectively improved the identification of bank note
Efficiency.
A kind of light source drive control method of imaging sensor provided in this embodiment, is carried with any embodiment of the present invention
The light source drive control circuit of the imaging sensor of confession belongs to same inventive concept, can be provided by any embodiment of the present invention
The light source drive control circuit of imaging sensor executes, and has corresponding function and advantageous effect.It is not detailed in the present embodiment
The technical detail of description, reference can be made to the light source drive control circuit for the imaging sensor that any embodiment of the present invention provides.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can 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 to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of light source drive control circuit of imaging sensor, which is characterized in that including：
First chip and first luminous group, first chip include group before group is exported to m before the 1st output, first hair
Light group includes the 1st light-emitting component to m light-emitting components, and each output end is electrically connected with the i-th light-emitting component in group before the i-th output
It connects, organizes and drive after configuration is complete i-th light-emitting component and described before first chip configuration, i-th output
Continue to configure the preceding group of the 1st output after the completion of m light-emitting components described in first chip drives；
Second chip and second luminous group, second chip include group after group is exported to m after the 1st output, second hair
Light group includes the 1st luminescent device to m luminescent devices, and each output end is electrically connected with the i-th luminescent device in group after the i-th output
It connects, organizes and drive after configuration is complete i-th luminescent device and described after second chip configuration, i-th output
Continue to configure group after the 1st output after the completion of m luminescent devices described in second chip drives；
Described in first chip drives when the i-th light-emitting component, group after the second chip configuration i-th output, Yi Jisuo
When stating second the i-th luminescent device of chip drives,
If i<M, then group before the first chip configuration i+1 exports；
If i=m, group before the 1st output of the first chip configuration；
Wherein, m is the integer more than or equal to 1, i=1,2 ..., m.
2. circuit according to claim 1, which is characterized in that
The period of i-th light-emitting component described in first chip drives and the i-th luminescent device described in second chip drives
Period do not overlap and second chip configures period for organizing and first chip drives after i-th output
The period of i-th light-emitting component is overlapped.
3. circuit according to claim 1, which is characterized in that
The period of i-th light-emitting component described in first chip drives and the i-th luminescent device described in second chip drives
Period do not overlap and second chip configure i-th output after period for organizing configured with first chip
The period organized before i-th output is overlapping.
4. circuit according to claim 1, which is characterized in that
The period of i-th light-emitting component described in first chip drives and the i-th luminescent device described in second chip drives
Period do not overlap and second chip configure i-th output after period for organizing configured with first chip
The period organized before the i+1 output is overlapping.
5. according to any circuits of claim 1-4, which is characterized in that first chip is the first constant current source chip,
Second chip is the second constant current source chip.
6. according to any circuits of claim 1-4, which is characterized in that the light-emitting component is with the luminescent device
LED light.
7. circuit according to claim 1, which is characterized in that it is described i-th output before organize maximum output current with it is described
The maximum operating currenbt of i-th light-emitting component is equal；The maximum output current and i-th luminescent device organized after i-th output
Maximum operating currenbt it is equal.
8. circuit according to claim 1, which is characterized in that before being exported for any one in group, group before the output
In each port output current it is identical；
For in group after any one output, the output current of each port is identical in group after the output.
9. a kind of light source drive control method of imaging sensor, which is characterized in that including：
It is organized before the i-th output of first chip configuration and drives the i-th light-emitting component and first chip drives after configuration is complete
Continue the preceding group of the 1st output of configuration after the completion of m light-emitting components；
Group after the i-th output of second chip configuration, and the i-th luminescent device and second chip is driven to drive after configuration is complete
Continue group after configuration the 1st exports after the completion of dynamic m luminescent devices；
Described in first chip drives when the i-th light-emitting component, group after the second chip configuration i-th output, Yi Jisuo
When stating second the i-th luminescent device of chip drives,
If i<M, then group before the first chip configuration i+1 exports；
If i=m, group before the 1st output of the first chip configuration；
Wherein, m is the integer more than or equal to 1, i=1,2 ..., m.
10. according to the method described in claim 9, it is characterized in that, described in first chip drives when the i-th light-emitting component,
Group and when i-th luminescent device of the second chip drives after second chip configuration, i-th output, first core
Group includes before piece configuration i+1 output：
The period of i-th light-emitting component described in first chip drives and the i-th luminescent device described in second chip drives
Period do not overlap and second chip configures period for organizing and first chip drives after i-th output
The period of i-th light-emitting component is overlapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710018293.XA CN106658860B (en) | 2017-01-11 | 2017-01-11 | A kind of the light source drive control circuit and method of imaging sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710018293.XA CN106658860B (en) | 2017-01-11 | 2017-01-11 | A kind of the light source drive control circuit and method of imaging sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106658860A CN106658860A (en) | 2017-05-10 |
| CN106658860B true CN106658860B (en) | 2018-09-11 |
Family
ID=58843615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710018293.XA Expired - Fee Related CN106658860B (en) | 2017-01-11 | 2017-01-11 | A kind of the light source drive control circuit and method of imaging sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106658860B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101074762A (en) * | 2006-05-15 | 2007-11-21 | 比亚迪股份有限公司 | Image sensor testing light source system |
| CN101199000A (en) * | 2005-06-13 | 2008-06-11 | 索尼爱立信移动通讯有限公司 | Lighting in Portable Communication Devices |
| CN201145909Y (en) * | 2008-01-24 | 2008-11-05 | 宁波盛光包装印刷有限公司 | High speed paper counter based on imaging sensor |
| CN101540130A (en) * | 2008-03-19 | 2009-09-23 | 凌通科技股份有限公司 | Image display device with persistence of vision and scanning method thereof |
| CN102142168A (en) * | 2011-01-14 | 2011-08-03 | 哈尔滨工业大学 | High-speed and high-resolution number collecting device of banknote sorting machine and identification method |
| CN103686103A (en) * | 2013-12-31 | 2014-03-26 | 上海集成电路研发中心有限公司 | Image sensor with merged and split modes and pixel units |
| CN104796640A (en) * | 2015-04-20 | 2015-07-22 | 中国航天科技集团公司第九研究院第七七一研究所 | Multifunctional column sequence control circuit of oversized area-array CMOS (complementary metal oxide semiconductor) image sensor |
| JP2016167074A (en) * | 2009-11-12 | 2016-09-15 | イグニス・イノベイション・インコーポレーテッドＩｇｎｉｓ Ｉｎｎｏｖａｔｉｏｎ Ｉｎｃｏｒｐｏｒａｔｅｄ | Light emitting display, efficient programming for stable current source sink, and high-speed calibration |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8791645B2 (en) * | 2006-02-10 | 2014-07-29 | Honeywell International Inc. | Systems and methods for controlling light sources |
-
2017
- 2017-01-11 CN CN201710018293.XA patent/CN106658860B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101199000A (en) * | 2005-06-13 | 2008-06-11 | 索尼爱立信移动通讯有限公司 | Lighting in Portable Communication Devices |
| CN101074762A (en) * | 2006-05-15 | 2007-11-21 | 比亚迪股份有限公司 | Image sensor testing light source system |
| CN201145909Y (en) * | 2008-01-24 | 2008-11-05 | 宁波盛光包装印刷有限公司 | High speed paper counter based on imaging sensor |
| CN101540130A (en) * | 2008-03-19 | 2009-09-23 | 凌通科技股份有限公司 | Image display device with persistence of vision and scanning method thereof |
| JP2016167074A (en) * | 2009-11-12 | 2016-09-15 | イグニス・イノベイション・インコーポレーテッドＩｇｎｉｓ Ｉｎｎｏｖａｔｉｏｎ Ｉｎｃｏｒｐｏｒａｔｅｄ | Light emitting display, efficient programming for stable current source sink, and high-speed calibration |
| CN102142168A (en) * | 2011-01-14 | 2011-08-03 | 哈尔滨工业大学 | High-speed and high-resolution number collecting device of banknote sorting machine and identification method |
| CN103686103A (en) * | 2013-12-31 | 2014-03-26 | 上海集成电路研发中心有限公司 | Image sensor with merged and split modes and pixel units |
| CN104796640A (en) * | 2015-04-20 | 2015-07-22 | 中国航天科技集团公司第九研究院第七七一研究所 | Multifunctional column sequence control circuit of oversized area-array CMOS (complementary metal oxide semiconductor) image sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106658860A (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103680411B (en) | A kind of LED shows single wire transmission circuit and the method for module single point correction data | |
| CN102834837B (en) | Using the iris identification device and method of multiple iris templates | |
| CN105243731B (en) | A kind of multinational banknote image identifying device of spectrum self adaptation, system and method | |
| CN109416740A (en) | Fingerprint detection device, method and electronic device | |
| US20110196240A1 (en) | Image processing apparatus, image processing method, image processing program and electronic apparatus | |
| CN107580394A (en) | A kind of driving chip, driving method, lighting circuit and illuminator | |
| CN111274906A (en) | Fingerprint anti-counterfeiting method and device | |
| CN106658860B (en) | A kind of the light source drive control circuit and method of imaging sensor | |
| CN106296973A (en) | Paper currency detecting method and bank note treatment device | |
| CN105788064B (en) | Bill identification method and device | |
| CN110334711A (en) | Character match method and device | |
| CN104240676B (en) | Method for adjusting electronic device and electronic device | |
| CN105243726A (en) | Method and device for acquiring digital image data | |
| CN109213397A (en) | Data processing method, device and user terminal | |
| CN103500017A (en) | Multi-pen recognition and tracking method for photoelectric interaction module | |
| CN211015545U (en) | Palm vein collection module and system | |
| CN107369242B (en) | A kind of Paper Currency Identification, device, terminal device and readable storage medium storing program for executing | |
| CN116416918A (en) | Configuration method, device, storage medium and processor of display screen | |
| CN110867159B (en) | Object recognition device and method for LED display screen | |
| CN105185286B (en) | A kind of method of adjustment and device of grayscale transition | |
| US7426500B2 (en) | Parallel computer architecture of a cellular type, modifiable and expandable | |
| CN113486878B (en) | Graphical interactive machine vision system | |
| KR102608827B1 (en) | Method of classifying implant classes for AI learning | |
| CN101819694A (en) | Acquisition system of double light source note sorter and control method thereof | |
| CN202677513U (en) | Reflection-type counterfeit detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180911 Termination date: 20220111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |