CN106791461B - A kind of exposal control method, exposure control circuit and mobile terminal - Google Patents
A kind of exposal control method, exposure control circuit and mobile terminal Download PDFInfo
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- CN106791461B CN106791461B CN201611062946.6A CN201611062946A CN106791461B CN 106791461 B CN106791461 B CN 106791461B CN 201611062946 A CN201611062946 A CN 201611062946A CN 106791461 B CN106791461 B CN 106791461B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
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Abstract
The embodiment of the invention provides a kind of exposal control method, exposure control circuit and mobile terminal, the method is applied to mobile terminal, comprising: in exposure process, obtains the exposure parameter in the different channels of each pixel in the cmos sensor of mobile terminal respectively；According to the exposure parameter, control is exposed to the different channels of each pixel respectively, solve the problems, such as in the prior art due to passage portion reach saturation after still carry out exposure and make photon spill into side other channels cause exposure occur it is not linear, the interference in exposure process between each pixel is avoided, ensure that sensor can obtain best sensitivity.
Description
Technical field
The present embodiments relate to field of communication technology more particularly to a kind of exposal control method, exposure control circuit and
Mobile terminal.
Background technique
CMOS (Complementary Metal-Oxide-Semiconductor sensor, complementary metal oxide half
Conductor) sensor due to possessing higher sensitivity, shorter time for exposure and increasingly advantages such as Pixel Dimensions for reducing, obtains
It is widely applied.The working principle of cmos sensor is: when ambient is irradiated to pixel array, it may occur that photoelectricity effect
It answers, to generate corresponding charge in pixel unit.It, can be in each picture in order to allow cmos sensor that can induce color
Optical filter is added on element.Currently, the use of more pixel array being that (red green and green is blue, arrangement by Bayer (Bayer) arrangement RGrGbB
Sequence can be a variety of).
Currently, cmos sensor realizes roller shutter type exposure by row control signal, i.e. a line a line successively exposes.Every row
The time for exposure of different pixels is identical, and is also to be kept in, transmitted with the time, and carrying out ADC (Analog-to-
Digital Converter, A-D converter) conversion etc..But in ambient light abundance, electronics collected by pixel
It can be more than the range that its potential well can accommodate, extra electrons is caused to spill into the pixel of surrounding, generate halation
(Blooming) phenomenon.Since two kinds of G (Green, green), R (Red, red) colors can reach prior to B (Blue, blue)
Saturation, therefore, under the identical time for exposure, the photon collected after G, R saturation can only spill into the channel B on side, cause B logical
The exposure in road occurs not linear.
In order to avoid the above problem, in the prior art by using addition Anti-Blooming (inhibit halation) circuit or
Person adds divider wall between pixel to improve halo problem.Although adding Anti-Blooming circuit or addition divider wall can be with
Photon between pixel is avoided to interfere and overflow, but higher and higher in nowadays pixel, and under the smaller and smaller demand of sensor area,
The area of each pixel will certainly be reduced by increasing the isolation between pixel, influence the photosensitive property of sensor entirety.
Summary of the invention
The embodiment of the present invention provides a kind of exposal control method, exposure control circuit and mobile terminal, to solve sensor
The problem of photon between middle pixel is interfered and is overflowed.
In a first aspect, being applied to mobile terminal the embodiment of the invention provides a kind of exposal control method, comprising:
In exposure process, the exposure ginseng in the different channels of each pixel in the cmos sensor of mobile terminal is obtained respectively
Number；
According to the exposure parameter, control is exposed to the different channels of each pixel respectively.
Second aspect, the embodiment of the invention also provides a kind of exposure control circuits, are applied to mobile terminal, comprising:
Cmos sensor, the cmos sensor include at least one pixel, and each pixel includes at least one channel；
It drives with each channel attached row of each pixel, is carried out for each channel to each pixel respectively
Spectrum assignment；
Respectively with each channel attached saturation decision circuitry of each pixel, for judging the potential well charge in each channel
Whether saturation is reached.
The third aspect, the embodiment of the invention also provides a kind of mobile terminals, comprising:
Module is obtained, in exposure process, obtains in the cmos sensor of mobile terminal each pixel respectively not
With the exposure parameter in channel；
Control module, the exposure parameter for being obtained according to the acquisition module, respectively to each pixel
Different channels are exposed control.
In this way, in embodiments of the present invention, in exposure process, can obtain respectively in the cmos sensor of mobile terminal
The exposure parameter in the different channels of each pixel, so as to according to the exposure parameter, respectively not to each pixel
It is exposed control with channel, solving makes light since passage portion still carries out exposure after reaching saturation in the prior art
Son, which spills into other channels of side, causes exposure not linear problem occur, avoids dry between each pixel in exposure process
It disturbs, ensure that sensor can obtain best sensitivity.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the flow chart of the exposal control method of first embodiment of the invention；
Fig. 2 is the flow chart of the exposal control method of second embodiment of the invention；
Fig. 3 is the connection schematic diagram of a kind of pixel access and row driving of the invention；
Fig. 4 is the connection schematic diagram of saturation decision circuitry of the invention；
Fig. 5 is the block diagram of the exposure control circuit of third embodiment of the invention；
Fig. 6 A is one of block diagram of mobile terminal of fourth embodiment of the invention；
Fig. 6 B is the two of the block diagram of the mobile terminal of fourth embodiment of the invention；
Fig. 6 C is the three of the block diagram of the mobile terminal of fourth embodiment of the invention；
Fig. 6 D is the four of the block diagram of the mobile terminal of fourth embodiment of the invention；
Fig. 7 is the block diagram of the mobile terminal of fifth embodiment of the invention；
Fig. 8 is the structural schematic diagram of the mobile terminal of sixth embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
First embodiment
Referring to Fig.1, the flow chart of the exposal control method of first embodiment of the invention is shown, the method is applied to move
Dynamic terminal, can specifically include following steps:
Step 101, in exposure process, the different channels of each pixel in the cmos sensor of mobile terminal are obtained respectively
Exposure parameter.
Currently, cmos sensor is all to be using row driving (row driver) control entire row of pixels, in each row again
Including multiple pixels.Wherein, each pixel is made of four transistors and a light sensitive diode, further, four crystal
Pipe can specifically include the channel R, the channel Gr, the channel Gb and channel B again.Channel refers to different inside every a line in cmos sensor
Filter set at sensor module.
In general, mainly passing through in exposure process using the mobile terminal of cmos sensor when executing photographing operation
Row control signal realizes roller shutter type exposure, i.e., is successively exposed to multiple pixels of every a line, when the row pixel exposure is completed
Afterwards, then to multiple pixels in next line identical exposing operation is executed, until completing the exposure to all pixels.
In embodiments of the present invention, it in exposure process, can obtain respectively each in the cmos sensor of mobile terminal
The exposure parameter in the different channels of pixel.
For example, it is logical that R in each pixel of the row can be obtained respectively when multiple pixels to certain a line are exposed
Road, the channel Gr, the channel Gb and channel B exposure parameter.
In the concrete realization, the different channels of every a line can be separately connected to different row drivings, for example, by the channel R
It is connected with R-Row driver (driving of red channel row), by the channel Gr and Gr-Row driver (driving of green channel row) phase
Even, the channel Gb is connected with Gb-Row driver (driving of green channel row), by channel B and B-Row driver (blue channel
Row driving) it is connected, to control different pixel accesses respectively by above-mentioned different row driving.
Step 102, according to the exposure parameter, control is exposed to the different channels of each pixel respectively.
It in embodiments of the present invention, can be according to the different of each channel after the exposure parameter for obtaining each channel
Exposure status executes different spectrum assignments.For example, can stop when in exposure, the pixel in each channel reaches saturation state
Only the channel is exposed.
In embodiments of the present invention, since each channel being connected with a row driving, so that each row drives equal energy
It is enough that individually corresponding channel is controlled, it does not interfere with each other.Therefore, each row driving can also be known corresponding logical in real time
The exposure status in road.
When a certain channel has reached saturation state in exposure process, at this point it is possible to stop the exposure to the channel, such as
The a certain channel of fruit is not up to saturated, then can continue to be exposed the channel, until the channel reaches saturation state.
It should be noted that while stopping exposing to a certain channel, if other channels are still not up to saturation state,
It then needs to continue to be exposed the channel of not up to saturation state, until each channel of pixel each in the row reaches full
With until.
For example, for the channel Gr, the channel Gb, the channel R and channel B in each pixel, the wherein channel Gr, the channel Gb and R
The time that channel reaches saturation will reach the time of saturation earlier than channel B, therefore, when the channel Gr, the channel Gb and the channel R reach full
And when, it can stop being exposed the above-mentioned channel Gr, the channel Gb and the channel R, at this point, since channel B is temporarily unsaturated, because
This, needs to continue to be exposed channel B, when channel B also reaches saturation state, can terminate the exposure to current line,
And it turns to and next line is continued to expose.
In embodiments of the present invention, it in exposure process, can obtain respectively each in the cmos sensor of mobile terminal
The exposure parameter in the different channels of pixel, so as to lead to the difference of each pixel respectively according to the exposure parameter
Road is exposed control, and solve makes photon overflow since passage portion still carries out exposure after reaching saturation in the prior art
Arriving other channels of side out causes exposure not linear problem occur, avoids the interference in exposure process between each pixel,
It ensure that sensor can obtain best sensitivity.
Second embodiment
Referring to Fig. 2, the flow chart of the exposal control method of second embodiment of the invention is shown, the method is applied to move
Dynamic terminal, can specifically include following steps:
Step 201, in exposure process, gesture acquired in the different channels of each pixel in cmos sensor is counted respectively
Trap charge.
Currently, each pixel in cmos sensor may include four kinds of the channel R, the channel Gr, the channel Gb and channel B etc. logical
Road, four kinds of channels can be arranged according to a variety of sequences.
In general, mainly passing through in exposure process using the mobile terminal of cmos sensor when executing photographing operation
Row control signal realizes roller shutter type exposure, i.e., is successively exposed to multiple pixels of every a line, when the row pixel exposure is completed
Afterwards, then to multiple pixels in next line identical exposing operation is executed, until completing the exposure to all pixels.
In embodiments of the present invention, each channel of a line every in cmos sensor can be separately connected to a row to drive
It is dynamic, as shown in figure 3, being the connection schematic diagram of a kind of pixel access and row driving of the invention.In Fig. 3, with R-Row
It is the channel R that driver (driving of red channel row), which is connected, to be connected with Gr-Row driver (driving of green channel row) be Gr
Channel, to be connected with Gb-Row driver (driving of green channel row) be the channel Gb, with B-Row driver (blue channel row
Driving) be connected be channel B.After different pixel accesses is drivingly connected from different rows respectively using the example in Fig. 3,
Enabling to each channel of pixel different in same a line can be controlled separately, to make different pixels and different channels
Between it is mutually indepedent, do not interfere with each other.
It further, in embodiments of the present invention, can also be respectively each one saturation decision circuitry of channel connection, thus
The saturation decision circuitry being connected with each channel can be respectively adopted, count the potential well electricity in each channel in exposure process
Lotus.As shown in figure 4, be the connection schematic diagram of saturation decision circuitry of the invention, specifically, can by a comparator be connected to
The row driving of corresponding channel is connected, thus using the comparator as saturation decision circuitry.
Generally, when particle moves in certain field of force, a certain limited range internal potential energy of the potential-energy function curve in space
When minimum, shaped like trap, referred to as potential well (well potential).In cmos sensor exposure, each channel is in the potential well
In acquired photon can become potential well charge.With each channel attached saturation decision circuitry can real-time statistics go out pair
The size of potential well charge in the channel answered.
Step 202, judge whether the potential well charge in each channel reaches saturation respectively.
In the concrete realization, when the potential well charge in a certain channel reaches the threshold value of respective channel, it may be considered that this is logical
The exposure in road has reached saturation state, so as to execute step 204, stops exposing the channel, if the potential well in the channel
Charge is not up to the threshold value of respective channel, it may be considered that the exposure in the channel is not up to saturation state, needs to be implemented step
203, continue to be exposed the channel.
Step 203, if the potential well charge in the channel is not up to saturated, continue to be exposed the channel.
In embodiments of the present invention, it after exposure is continued in the channel to not up to saturation state, can return to step
202, judge whether the potential well charge in the channel reaches saturation again.
Step 204, if the potential well charge in the channel reaches saturation, stop exposing the channel.
In the concrete realization, since each channel is connected separately with different row drivings, to control the exposure in each channel,
Therefore, if the potential well charge in the channel reaches saturation, the corresponding row driving in the channel can be closed, is stopped to the channel
It is exposed, to avoid due to continuing to be exposed the channel, and photon is made to spill into bypass, cause the not line of exposure
Property.
After each channel in each pixel to every a line terminates exposure, the data of this line can be output to
Buffer then proceedes to carry out each channel in next line by the way of in step 201- step 204 for subsequent use
Exposure.
In embodiments of the present invention, by increasing for channel each in cmos sensor, a corresponding row is driven and saturation is sentenced
Deenergizing, so as to judge whether the potential well charge of respective channel reaches threshold value by the saturation decision circuitry, if so,
It may be considered that the exposure in the channel has reached saturation state, it is then possible to close the corresponding row driving in the channel, end pair
The exposure in the channel avoids continuing to expose and photon is made to be spilled over to bypass, the not linear of exposure is caused, so that each pixel
Between do not interfere with each other, ensure that sensor can obtain best sensitivity.
It should be noted that for simple description, therefore, it is stated as a series of action groups for embodiment of the method
It closes, but those skilled in the art should understand that, embodiment of that present invention are not limited by the describe sequence of actions, because according to
According to the embodiment of the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art also should
Know, the embodiments described in the specification are all preferred embodiments, and the related movement not necessarily present invention is implemented
Necessary to example.
3rd embodiment
Referring to Fig. 5, the block diagram of the exposure control circuit of third embodiment of the invention is shown, the exposure control circuit is answered
For mobile terminal, the exposure control circuit can be realized the thin of exposal control method of the embodiment one into embodiment two
Section, and reach identical effect, it can specifically include following part:
Cmos sensor 501, the cmos sensor 501 include at least one pixel 502, and each pixel 502 includes extremely
A few channel 503；
The row driving 504 being connect respectively with each channel 503 of each pixel 502, for each pixel 502
Each channel 503 is exposed control；
The saturation decision circuitry 505 being connect respectively with each channel 503 of each pixel 502, for judging each channel
Whether 503 potential well charge reaches saturation.
It should be noted that illustrate only the row driving 504 and saturation connecting with one of channel 503 in Fig. 5
Decision circuitry 505, according to foregoing description, it should be appreciated by those skilled in the art that in each pixel 502 of cmos sensor 501
Each channel 503 on, should all be connected with row driving 504 and saturation decision circuitry 505.
In embodiments of the present invention, the row driving 504 is also used to reach full in the potential well charge in the channel 502 connected
And when, stop exposing the channel.
In embodiments of the present invention, it in exposure process, can obtain respectively each in the cmos sensor of mobile terminal
The exposure parameter in the different channels of pixel, so as to lead to the difference of each pixel respectively according to the exposure parameter
Road is exposed control, and solve makes photon overflow since passage portion still carries out exposure after reaching saturation in the prior art
Arriving other channels of side out causes exposure not linear problem occur, avoids the interference in exposure process between each pixel,
It ensure that sensor can obtain best sensitivity.
Fourth embodiment
Referring to Fig. 6 A, one of block diagram of mobile terminal of fourth embodiment of the invention is shown, includes in embodiment three
Exposure control circuit, can be realized the details of exposal control method of the embodiment one into embodiment two, and reach identical
Effect.The mobile terminal can specifically include following module:
Module 610 is obtained, in exposure process, obtaining each pixel in the cmos sensor of mobile terminal respectively
The exposure parameter in different channels；
Control module 620, the exposure parameter for being obtained according to the acquisition module, respectively to each pixel
Different channels be exposed control.
On the basis of Fig. 6 A, optionally, referring to Fig. 6 B, the block diagram of the mobile terminal of fourth embodiment of the invention is shown
Two, the acquisition module 610 can specifically include following submodule:
Statistic submodule 611, for counting the different channels of each pixel in cmos sensor respectively in exposure process
Acquired potential well charge.
On the basis of Fig. 6 B, optionally, referring to Fig. 6 C, the block diagram of the mobile terminal of fourth embodiment of the invention is shown
Three, the statistic submodule 611 can specifically include such as lower unit:
Statistic unit 6111 is counted for the saturation decision circuitry being connected with each channel to be respectively adopted exposed
The potential well charge in each channel in journey；
Wherein, each channel is connected separately with a saturation decision circuitry.
In embodiments of the present invention, the control module 620 can specifically include following submodule:
Judging submodule 621, for judging whether the potential well charge in each channel reaches saturation respectively；
Control submodule 622 stops exposing the channel if the potential well charge for the channel reaches saturation；
If the potential well charge in the channel is not up to saturated, continue to be exposed the channel.
On the basis of Fig. 6 B, optionally, referring to Fig. 6 D, the block diagram of the mobile terminal of fourth embodiment of the invention is shown
Four, the control submodule 622 can specifically include such as lower unit:
Closing unit 6221 is closed the corresponding row in the channel and is driven if the potential well charge for the channel reaches saturation
It is dynamic；
Wherein, each channel is connected separately with a line driving.
Mobile terminal can be realized each process that mobile terminal is realized in the embodiment of the method for Fig. 1 to Fig. 4, to avoid weight
Multiple, which is not described herein again.In embodiments of the present invention, in exposure process, the CMOS sensing of mobile terminal can be obtained respectively
The exposure parameter in the different channels of each pixel in device, so as to according to the exposure parameter, respectively to each pixel
Different channels be exposed control, solve in the prior art due to passage portion reach saturation after still carry out exposure and
So that photon is spilt into other channels of side causes exposure not linear problem occur, avoids in exposure process between each pixel
Interference, ensure that sensor can obtain best sensitivity.
5th embodiment
Fig. 7 is a kind of block diagram of mobile terminal of fifth embodiment of the invention.Mobile terminal 700 shown in Fig. 7 include: to
A few processor 701, memory 702, at least one network interface 704 and user interface 703.It is each in mobile terminal 700
A component is coupled by bus system 705.It is understood that bus system 705 is for realizing the connection between these components
Communication.Bus system 705 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.But
For the sake of clear explanation, various buses are all designated as bus system 705 in Fig. 7, mobile terminal 700 further includes picture shooting assembly
706, picture shooting assembly 706 includes camera.
Wherein, user interface 703 may include display, keyboard or pointing device (for example, mouse, trace ball
(trackball), touch-sensitive plate or touch screen etc..
It is appreciated that the memory 702 in the embodiment of the present invention can be volatile memory or nonvolatile memory,
It or may include both volatile and non-volatile memories.Wherein, nonvolatile memory can be read-only memory (Read-
OnlyMemory, ROM), programmable read only memory (ProgrammableROM, PROM), Erasable Programmable Read Only Memory EPROM
(ErasablePROM, EPROM), electrically erasable programmable read-only memory (ElectricallyEPROM, EEPROM) dodge
It deposits.Volatile memory can be random access memory (RandomAccessMemory, RAM), and it is slow to be used as external high speed
It deposits.By exemplary but be not restricted explanation, the RAM of many forms is available, such as static random access memory
(StaticRAM, SRAM), dynamic random access memory (DynamicRAM, DRAM), Synchronous Dynamic Random Access Memory
(SynchronousDRAM, SDRAM), double data speed synchronous dynamic RAM (DoubleDataRate
SDRAM, DDRSDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), synchronized links
Dynamic random access memory (SynchlinkDRAM, SLDRAM) and direct rambus random access memory
(DirectRambusRAM, DRRAM).The memory 702 of the system and method for description of the embodiment of the present invention is intended to include but unlimited
In the memory of these and any other suitable type.
In some embodiments, memory 702 stores following element, executable modules or data structures, or
Their subset of person or their superset: operating system 7021 and application program 7022.
Wherein, operating system 7021 include various system programs, such as ccf layer, core library layer, driving layer etc., are used for
Realize various basic businesses and the hardware based task of processing.Application program 7022 includes various application programs, such as media
Player (MediaPlayer), browser (Browser) etc., for realizing various applied business.Realize embodiment of the present invention side
The program of method may be embodied in application program 7022.
In embodiments of the present invention, by the program or instruction of calling memory 702 to store, specifically, can be application
The program or instruction stored in program 6022, processor 701 are used in exposure process, and the CMOS for obtaining mobile terminal respectively is passed
The exposure parameter in the different channels of each pixel in sensor；According to the exposure parameter, respectively to the difference of each pixel
Channel is exposed control.
The method that the embodiments of the present invention disclose can be applied in processor 701, or be realized by processor 701.
Processor 701 may be a kind of IC chip, the processing capacity with signal.During realization, the above method it is each
Step can be completed by the integrated logic circuit of the hardware in processor 701 or the instruction of software form.Above-mentioned processing
Device 701 can be general processor, digital signal processor (DigitalSignalProcessor, DSP), specific integrated circuit
(ApplicationSpecific IntegratedCircuit, ASIC), ready-made programmable gate array
(FieldProgrammableGateArray, FPGA) either other programmable logic device, discrete gate or transistor logic
Device, discrete hardware components.It may be implemented or execute disclosed each method, step and the logical box in the embodiment of the present invention
Figure.General processor can be microprocessor or the processor is also possible to any conventional processor etc..In conjunction with the present invention
The step of method disclosed in embodiment, can be embodied directly in hardware decoding processor and execute completion, or use decoding processor
In hardware and software module combination execute completion.Software module can be located at random access memory, and flash memory, read-only memory can
In the storage medium of this fields such as program read-only memory or electrically erasable programmable memory, register maturation.The storage
Medium is located at memory 702, and processor 701 reads the information in memory 702, and the step of the above method is completed in conjunction with its hardware
Suddenly.
It is understood that the embodiment of the present invention description these embodiments can with hardware, software, firmware, middleware,
Microcode or combinations thereof is realized.For hardware realization, processing unit be may be implemented in one or more specific integrated circuit (App
LicationSpecificIntegratedCircuits, ASIC), digital signal processor
(DigitalSignalProcessing, DSP), digital signal processing appts (DSPDevice, DSPD), programmable logic device
(ProgrammableLogicDevice, PLD), field programmable gate array (Field-ProgrammableGateArray,
FPGA), general processor, controller, microcontroller, microprocessor, other electronics lists for executing function of the present invention
In member or combinations thereof.
For software implementations, can by execute the embodiment of the present invention described in function module (such as process, function etc.) come
Realize technology described in the embodiment of the present invention.Software code is storable in memory and is executed by processor.Memory can
With portion realizes in the processor or outside the processor.
Optionally, the processor 701 is also used to: in exposure process, counting each pixel in cmos sensor respectively
Different channels acquired in potential well charge.
Optionally, the processor 701 is also used to: the saturation decision circuitry being connected with each channel is respectively adopted, unites
Count the potential well charge in each channel in exposure process；Wherein, each channel is connected separately with a saturation decision circuitry.
Optionally, the processor 701 is also used to: judging whether the potential well charge in each channel reaches saturation respectively；If
The potential well charge in the channel reaches saturation, then stops exposing the channel；If the potential well charge in the channel is not up to full
With then continue to be exposed the channel.
Optionally, the processor 701 is also used to: if the potential well charge in the channel reaches saturation, closing the channel
Corresponding row driving；Wherein, each channel is connected separately with a line driving.
Mobile terminal 700 can be realized each process that mobile terminal is realized in previous embodiment, to avoid repeating, here
It repeats no more.The embodiment of the present invention can obtain each pixel in the cmos sensor of mobile terminal in exposure process respectively
Different channels exposure parameter, so as to according to the exposure parameter, respectively to the different channels of each pixel into
Row spectrum assignment, solving spills into photon since passage portion still carries out exposure after reaching saturation in the prior art
Other channels of side cause exposure not linear problem occur, avoid the interference in exposure process between each pixel, guarantee
Sensor can obtain best sensitivity.
Sixth embodiment
Fig. 8 is the structural schematic diagram of the mobile terminal of sixth embodiment of the invention.Specifically, the mobile terminal in Fig. 8 can
Think mobile phone, tablet computer, personal digital assistant (PersonalDigital Assistant, PDA) or vehicle-mounted computer etc..
Mobile terminal in Fig. 8 includes radio frequency (RadioFrequency, RF) circuit 810, memory 820, input unit
830, display unit 840, processor 860, voicefrequency circuit 870, WiFi (WirelessFidelity) module 880 and power supply 890,
Mobile terminal further includes picture shooting assembly 850, and picture shooting assembly 850 includes camera.
Wherein, input unit 830 can be used for receiving the number or character information of user's input, and generation and mobile terminal
User setting and function control related signal input.Specifically, in the embodiment of the present invention, which can be with
Including touch panel 831.Touch panel 831, also referred to as touch screen collect the touch operation (ratio of user on it or nearby
Such as user uses the operation of finger, stylus any suitable object or attachment on touch panel 831), and according to setting in advance
Fixed formula drives corresponding attachment device.Optionally, touch panel 831 may include touch detecting apparatus and touch controller two
A part.Wherein, the touch orientation of touch detecting apparatus detection user, and touch operation bring signal is detected, signal is passed
Give touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into contact coordinate, then
The processor 860 is given, and order that processor 860 is sent can be received and executed.Furthermore, it is possible to using resistance-type, electricity
The multiple types such as appearance formula, infrared ray and surface acoustic wave realize touch panel 831.In addition to touch panel 831, input unit 830
Can also include other input equipments 832, other input equipments 832 can include but is not limited to physical keyboard, function key (such as
Volume control button, switch key etc.), trace ball, mouse, one of operating stick etc. or a variety of.
Wherein, display unit 840 can be used for showing information input by user or be supplied to the information and movement of user
The various menu interfaces of terminal.Display unit 840 may include display panel 841, optionally, can use LCD or organic light emission
The forms such as diode (OrganicLight-EmittingDiode, OLED) configure display panel 841.
It should be noted that touch panel 831 can cover display panel 841, touch display screen is formed, when the touch display screen is examined
After measuring touch operation on it or nearby, processor 860 is sent to determine the type of touch event, is followed by subsequent processing device
860 provide corresponding visual output according to the type of touch event in touch display screen.
Touch display screen includes Application Program Interface viewing area and common control viewing area.The Application Program Interface viewing area
And arrangement mode of the common control viewing area does not limit, can be arranged above and below, left-right situs etc. can distinguish two it is aobvious
Show the arrangement mode in area.The Application Program Interface viewing area is displayed for the interface of application program.Each interface can be with
The interface elements such as the icon comprising at least one application program and/or widget desktop control.The Application Program Interface viewing area
Or the empty interface not comprising any content.This commonly uses control viewing area for showing the higher control of utilization rate, for example,
Application icons such as button, interface number, scroll bar, phone directory icon etc. are set.
Wherein processor 860 is the control centre of mobile terminal, utilizes each of various interfaces and connection whole mobile phone
A part by running or execute the software program and/or module that are stored in first memory 821, and is called and is stored in
Data in second memory 822 execute the various functions and processing data of mobile terminal, to carry out to mobile terminal whole
Monitoring.Optionally, processor 860 may include one or more processing units.
In embodiments of the present invention, by call store the first memory 821 in software program and/or module and/
Or the data in the second memory 822, processor 860 are used in exposure process, the CMOS for obtaining mobile terminal respectively is passed
The exposure parameter in the different channels of each pixel in sensor；According to the exposure parameter, respectively to the difference of each pixel
Channel is exposed control.
Optionally, the processor 860 is also used to: in exposure process, counting each pixel in cmos sensor respectively
Different channels acquired in potential well charge.
Optionally, the processor 860 is also used to: the saturation decision circuitry being connected with each channel is respectively adopted, unites
Count the potential well charge in each channel in exposure process；Wherein, each channel is connected separately with a saturation decision circuitry.
Optionally, the processor 860 is also used to: judging whether the potential well charge in each channel reaches saturation respectively；If
The potential well charge in the channel reaches saturation, then stops exposing the channel；If the potential well charge in the channel is not up to full
With then continue to be exposed the channel.
Optionally, the processor 860 is also used to: if the potential well charge in the channel reaches saturation, closing the channel
Corresponding row driving；Wherein, each channel is connected separately with a line driving.
As it can be seen that the embodiment of the present invention can obtain each in the cmos sensor of mobile terminal respectively in exposure process
The exposure parameter in the different channels of pixel, so as to lead to the difference of each pixel respectively according to the exposure parameter
Road is exposed control, and solve makes photon overflow since passage portion still carries out exposure after reaching saturation in the prior art
Arriving other channels of side out causes exposure not linear problem occur, avoids the interference in exposure process between each pixel,
It ensure that sensor can obtain best sensitivity.
Those of ordinary skill in the art may be aware that the embodiment in conjunction with disclosed in the embodiment of the present invention describe it is each
Exemplary unit and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In embodiment provided by the present invention, it should be understood that disclosed device and method can pass through others
Mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of device or unit
It connects, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, ROM, RAM, magnetic or disk etc. are various can store program code
Medium.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (7)
1. a kind of exposal control method is applied to mobile terminal characterized by comprising
In exposure process, the exposure parameter in the different channels of each pixel in the cmos sensor of mobile terminal is obtained respectively；
According to the exposure parameter, control is exposed to the different channels of each pixel respectively；
Wherein, described according to the exposure parameter, the step of control is exposed to the different channels of each pixel respectively,
Include:
Judge whether the potential well charge in each channel reaches saturation respectively；
If the potential well charge in the channel reaches saturation, stop exposing the channel；
If the potential well charge in the channel is not up to saturated, continue to be exposed the channel；
Wherein, if the potential well charge in the channel reaches saturation, stop the step of exposing to the channel, comprising:
If the potential well charge in the channel reaches saturation, the corresponding row driving in the channel is closed；
Wherein, each channel is connected separately with a line driving.
2. obtaining mobile terminal respectively the method according to claim 1, wherein described in exposure process
In cmos sensor the step of the exposure parameter in the different channels of each pixel, comprising:
In exposure process, potential well charge acquired in the different channels of each pixel in cmos sensor is counted respectively.
3. according to the method described in claim 2, counting cmos sensor respectively it is characterized in that, described in exposure process
In each pixel different channels acquired in potential well charge the step of, comprising:
The saturation decision circuitry being connected with each channel is respectively adopted, counts the potential well electricity in each channel in exposure process
Lotus；
Wherein, each channel is connected separately with a saturation decision circuitry.
4. a kind of exposure control circuit is applied to mobile terminal characterized by comprising
Cmos sensor, the cmos sensor include at least one pixel, and each pixel includes at least one channel；
It drives with each channel attached row of each pixel, is exposed for each channel to each pixel respectively
Control；
Respectively with each channel attached saturation decision circuitry of each pixel, for judge each channel potential well charge whether
Reach saturation；
Wherein, when row driving is also used to the potential well charge in the channel connected and reaches saturation, stop exposing the channel
Light.
5. a kind of mobile terminal characterized by comprising
Module is obtained, the difference in exposure process, obtaining each pixel in the cmos sensor of mobile terminal respectively is logical
The exposure parameter in road；
Control module, the exposure parameter for being obtained according to the acquisition module, respectively to the difference of each pixel
Channel is exposed control；
Wherein, the control module, comprising:
Judging submodule, for judging whether the potential well charge in each channel reaches saturation respectively；
Control submodule stops exposing the channel if the potential well charge for the channel reaches saturation；If described logical
The potential well charge in road is not up to saturated, then continues to be exposed the channel；
Wherein, the control submodule, comprising:
Closing unit closes the corresponding row driving in the channel if the potential well charge for the channel reaches saturation；
Wherein, each channel is connected separately with a line driving.
6. mobile terminal according to claim 5, which is characterized in that the acquisition module, comprising:
Acquisition submodule, in exposure process, counting respectively in cmos sensor acquired in the different channels of each pixel
Potential well charge.
7. mobile terminal according to claim 6, which is characterized in that the acquisition submodule, comprising:
Statistic unit, for the saturation decision circuitry being connected with each channel to be respectively adopted, statistics is each in exposure process
The potential well charge in channel；
Wherein, each channel is connected separately with a saturation decision circuitry.
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| CN110505387B (en) * | 2019-08-29 | 2021-06-11 | Oppo广东移动通信有限公司 | Imaging system, terminal and image acquisition method |
| CN110719412B (en) * | 2019-09-29 | 2022-09-16 | 炬佑智能科技(苏州)有限公司 | Method for controlling exposure time of CMOS image sensor |
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| CN101796820A (en) * | 2007-09-10 | 2010-08-04 | 索尼公司 | Image sensor |
| CN101902585A (en) * | 2008-11-21 | 2010-12-01 | 株式会社东芝 | Solid-state imaging device |
| CN102170533A (en) * | 2010-02-26 | 2011-08-31 | 索尼公司 | Solid-state image pickup apparatus, driving method for solid-state image pickup apparatus and electronic device |
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