CN104125409B - Imaging sensor and the camera for including it - Google Patents
Imaging sensor and the camera for including it Download PDFInfo
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- CN104125409B CN104125409B CN201410092316.8A CN201410092316A CN104125409B CN 104125409 B CN104125409 B CN 104125409B CN 201410092316 A CN201410092316 A CN 201410092316A CN 104125409 B CN104125409 B CN 104125409B
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- aperture
- control unit
- imaging sensor
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Classifications
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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
- H04N23/76—Circuitry for compensating brightness variation in the scene by influencing the image signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
- H04N25/766—Addressed sensors, e.g. MOS or CMOS sensors comprising control or output lines used for a plurality of functions, e.g. for pixel output, driving, reset or power
Abstract
The present invention relates to imaging sensor and include its camera, it can control the control portion of gain of aperture more particularly to built-in in imaging sensor and simplify system, and the action of automatic diaphragm lens and the action of control portion of gain are independently controlled, so as to control the technology of aperture exactly.The present invention includes：Pattern matrix, receives the video image signal of subject, and is converted to digital image data；Control portion of gain, control the gain of digital image data；Register, store the setting data for the action of aperture and the yield value of control portion of gain；And diaphragm control unit, the data with being stored in register accordingly generate pulse signal, above-mentioned pulse signal is used for action and the responsiveness of above-mentioned control portion of gain for independently controlling aperture.
Description
Technical field
The present invention relates to imaging sensor and include its camera, more particularly to the optical image signal of outside is turned
It is changed to the technology of the imaging sensor of electric image signal.
Background technology
In general, imaging sensor is the device that the optical image signal of outside is converted to electric image signal.Especially,
CMOS（Complementary metal oxide semiconductor）Imaging sensor is manufactured imaging sensor using CMOS manufacturing technologies.
In cmos image sensor, each pixel（Pixel）Using following manner, i.e.,：Using photodiode by by pair of subject
Answer the optical signal of partial radiation to be stored after being converted to electronics, and the quantity of the electronics with being accumulated proportionally is presented
The quantity of electric charge be converted to voltage signal and export.
Imaging sensor, which is roughly divided into, uses complementary MOS（CMOS；Complementary metal oxide semiconductor）The CMOS figures of technology
As sensor and use charge coupling device（CCD；Charge Coupled Device）The ccd image sensor of technology, and this
All made a bit using semiconductor technology.
These cmos image sensors are to be widely used in such as mobile phone（Mobile Phone）, personal computer
（Personal Computer）Use camera（Camera）, the various electronic products such as video camera and digital camera equipment
（Device）.
Because cmos image sensor is compared with the CCD as imaging sensor in the past, there is type of drive simplicity, and energy
Enough it is integrated in signal processing circuit（Signal Processing Circuit）Chip the advantages of, it is thus possible to formed
On-chip system（SoC, System On Chip）, thus make it possible the miniaturization of module.Further, since being capable of interchangeability
Established using conventional（Set-up）CMOS technology, thus with can reduce the lot of advantages such as manufacturing cost, demand also just with
Day all increasings.
Generally, such as digital camera, video camera and figure is included being mounted with the portable terminal etc. of camera-enabled
As the camera of sensor is shot by camera lens the image taken in using imaging sensor, and obtain signal of video signal.In addition,
Above-mentioned signal of video signal is converted into digital image data, and with preview（preview）The mode of picture is shown in liquid crystal panel.
In the state of showing preview image, if user presses shutter key（shutter key）, then image data can by image compression and
It is stored as picture data.
Fig. 1 is the structure chart for being related to the existing camera including imaging sensor.
Existing camera includes automatic diaphragm lens（Auto IRIS lens）10th, main part 20 and display part
30.Here, main part 20 includes imaging sensor 21, control portion of gain 22 and drive division 23.
Here, automatic diaphragm lens 10 are transmitted through the table of imaging sensor 21 according to the light source species of subject to change
The wavelength of the light in face, to adjust light quantity.
The video image signal that the shooting of imaging sensor 21 is inputted by automatic diaphragm lens 10.Here, existing image
Sensor 21 can be by charge coupling device（CCD, Charge Coupled Device）Imaging sensor is realized.
In addition, control portion of gain 22 controls the simulation of the image output of imaging sensor 21（analogue）Gain, and to
Display part 30 exports.In addition, drive division 23 accordingly controls the dynamic of automatic diaphragm lens 10 with the output of imaging sensor 21
Make.In addition, display part 30 shows the image output of control portion of gain 22 over the display.
This existing camera sets imaging sensor 21 and control portion of gain 22 respectively.Thus, having can
Output with control portion of gain 22 dividually independent control automatic diaphragm lens 10 the advantages of.
But existing camera has single back-end chip to control aperture camera lens 10（Backend Chip）,
So as to cause the rising of product price.In addition, existing camera dividually has control portion of gain with imaging sensor 21
22。
In the case of dividually possessing imaging sensor 21 and control portion of gain 22 in camera, the chi of camera
Very little to become big, camera realizes expense increase.Moreover, can not letter due to the increase for the various circuits for linking each structure
Just camera is realized.
The content of the invention
The present invention has following feature, i.e. built-in in imaging sensor to control aperture（IRIS）Gain control
Portion, simplify system, and independently control the action of automatic diaphragm lens and the action of control portion of gain, thus, it is possible to exactly
Control aperture.
The imaging sensor of embodiments of the invention is characterised by, including：Pattern matrix, the pattern matrix are received and clapped
The video image signal of body is taken the photograph, and is converted to digital image data；Control portion of gain, control portion of gain control digitized video number
According to gain；Register, the register store the setting data for the action of aperture and the yield value of control portion of gain；And
Diaphragm control unit, the diaphragm control unit accordingly generate pulse signal, above-mentioned pulse signal with being stored in the data of register
For independently controlling the action of aperture and the responsiveness of control portion of gain.
The imaging sensor of an alternative embodiment of the invention is characterised by, including：Automatic diaphragm lens, the automatic light
Lens shooting video image signal is enclosed, and adjusts the light quantity injected by aperture；Imaging sensor, the imaging sensor are received and regarded
Frequency signal of video signal, and digital image data is converted to, the gain of digital image data is controlled, is generated for independently controlling aperture
Action and above-mentioned gain control action pulse signal；And drive division, the pulse duty factor of the driver and pulse signal
The accordingly driving voltage of the driving of output control aperture.
The present invention provides following effect.
First, the built-in control portion of gain that can control aperture in imaging sensor so that system simplifies, so as to
Reduce manufacturing cost.
Second, there is provided the action of automatic diaphragm lens and the action of control portion of gain are individually controlled, so as to accurate
Ground controls the effect of aperture.
In addition, the preferred embodiments of the present invention are for illustration purposes, as long as one of ordinary skill in the art, with regard to that can pass through
The technological thought of the appended claimed scope of invention carried out with scope a variety of modifications, change, instead of and it is additional, it is and such
Modification, change etc. should be regarded as belonging to the claimed scope of invention.
Brief description of the drawings
Fig. 1 is the structure chart of the existing camera including imaging sensor.
Fig. 2 is the structure chart of the camera including imaging sensor of embodiments of the invention.
Fig. 3 is the figure of the aperture driving voltage of the automatic diaphragm lens for illustrating Fig. 2.
Fig. 4 to Fig. 6 is the figure of the action of the diaphragm control unit for illustrating Fig. 2.
Fig. 7 is the figure of the gain control action of the diaphragm control unit for illustrating Fig. 2.
Fig. 8 to Figure 10 is the detailed circuit diagram of Fig. 2 drive division.
Figure 11 to Figure 13 is the detailed circuit diagram and oscillogram of the diaphragm control unit shown in Fig. 2 and Fig. 9.
Figure 14 is for the flow chart for the action for illustrating the diaphragm control unit shown in Fig. 9 and Figure 10.
（The explanation of reference）
100：Automatic diaphragm lens（Auto IRIS lens）；200：Camera module；300：Display part；210：Image passes
Sensor；230：Drive division；211：Pattern matrix；212：Control portion of gain；213：Image processing part；214：Diaphragm control unit；
215：Register.
Embodiment
Hereinafter, embodiments of the invention are described in detail referring to the drawings.
Fig. 2 is the structure chart of the camera including imaging sensor of embodiments of the invention.
The camera of embodiments of the invention includes automatic diaphragm lens（Auto IRIS lens）100th, head mould is imaged
Block 200 and display part 300.Here, camera module 200 includes imaging sensor 210 and drive division 230.In addition, image passes
Sensor 210 includes pattern matrix 211, control portion of gain 212, image processing part 213, diaphragm control unit 214 and register
215。
Here, automatic diaphragm lens 100 are transmitted through imaging sensor 210 according to the species of the light source of subject to change
Surface light wavelength, to adjust light quantity.
The shooting of imaging sensor 210 is by automatic diaphragm lens 100 and the video image signal of input.It is here, of the invention
The imaging sensor 210 of embodiment can utilize charge coupling device（Charge Coupled Device；CCD）Image passes
Sensor and complementary metal oxide semiconductor（Complementary Metal Oxide Semiconductor；CMOS）Image
Sensor etc., embodiments of the invention image taking sensor 210 utilize cmos image sensor（CIS；
CMOS Image Sensor）Illustrated exemplified by composition.
Pattern matrix 211 shoots subject to receive the input of video image signal simultaneously by automatic diaphragm lens 100
Be converted to electric signal.In addition, pattern matrix 211 exports the signal of video signal inputted to control portion of gain 212.In addition, gain
Control unit 212 is based on monochrome information, controls analog gain in the image output of pattern matrix 211, and to image processing part 213
Output.
Image processing part 213 is modified to the signal of video signal applied from control portion of gain 212, and is controlled, so as to
The image of clear image quality can be made to be shown in display part 300.In addition, image processing part 213 enters to brightness and color treatments
Row amendment, additionally it is possible to support AWB（AWB）, automatic exposure（AE）, gamma-corrected, color correct, interpolation method, at mirror image
Reason（Mirror）And the specially treated function such as determination of image format.
Diaphragm control unit 214 accordingly controls the action of drive division 230 with the yield value that control portion of gain 212 exports.
Now, for controlling the action of aperture and the activation bit of the action of control portion of gain 212 to be stored in register 215.Aperture
Control unit 214 independently controls the action of control portion of gain 212 and drive division 230 based on the information for being stored in register 215
Action so that the output of control portion of gain 212 on caused by the driving of aperture influence minimize.
In addition, drive division 230 accordingly generates driving voltage V_DRV with the output of diaphragm control unit 214, and utilize upper
Driving voltage V_DRV is stated to control the action of the aperture of automatic diaphragm lens 100.In addition, display part 300 is by image processing part
213 image output is shown in display.
Camera refer to shoot subject and by the signal of video signal generated pass through as defined in signal transacting postscript
Record the device in recording medium.The shooting of subject is completed by camera possessed capturing element.As photography
The example of device, camera, CCTV can be enumerated（closed circuit television；Closed-circuit television）Deng.Apartment,
The indoor or outdoors such as department store, house are provided with the monitoring camera for the purpose of guard round the clock.
In order that camera more brightly shoots subject, it is necessary to is maintained the light quantity for being injected into capturing element
Appropriate amount.Therefore, camera possesses the automatic diaphragm lens 100 for adjusting the light quantity for being injected into capturing element.
Camera provides following function：Automatically the opening and closing amount of the aperture of automatic diaphragm lens 100 is adjusted, made
The light quantity that capturing element must be injected into optimizes.That is, for the automatic exposure of imaging sensor 210（AE）The area that can not be adjusted
Domain, open aperture according to gradation or close aperture, so as to which the brightness of image is maintained into constant.For example, it is being taken
The dark situation of body, i.e. in the case where illumination is low, open aperture and cause the light quantity increase for being injected into capturing element, and clapped
Take the photograph the bright situation of body, i.e. in the case of illumination height, close aperture and the light quantity for being injected into capturing element is reduced.
The aperture of automatic diaphragm lens 100 acts according to driving voltage V_DRV, as shown in figure 3, with hysteresis
（Hysteresis）Characteristic.That is, if driving voltage V_DRV voltage level is more than voltage V2, aperture is opened, if driving electricity
Pressing V_DRV voltage level, then aperture is closed below voltage V1.
But in the gain that control portion of gain 212 is exported（Gain）In the case that signal has an impact to drive division 230, increase
The action of beneficial control unit 212 and aperture can be carried out simultaneously.In this case, when the environment from bright environmental change for dark
When, opened in aperture to before full-size, the gain of control portion of gain 212 first rises, and can increase noise.In addition, work as
From the environmental change of dark for bright environment when, before the gain of control portion of gain 212 minimizes value, aperture closes first
Close to minimum dimension.In this case, even in bright place, it can also apply gain and increase noise.
Therefore, embodiments of the invention utilize diaphragm control unit 214, and the gain with control portion of gain 212 is only in association
The action of vertical control aperture.
Fig. 4 to Fig. 6 is the figure of the action of the diaphragm control unit 214 for illustrating Fig. 2.
Diaphragm control unit 214 adjusts the responsiveness of control portion of gain 212, and is controlled, to make control portion of gain
212 action and the action of aperture will not be overlapping.
As shown in figure 4, in the dark situation of monochrome information, i.e. in the case where illumination is low, make the action of control portion of gain 212
Slow, so as to ensure the time for making aperture fully open.On the contrary, as shown in figure 5, in the bright situation of monochrome information
Under, the responsiveness of control portion of gain 212 is accelerated, so that aperture is closed after the release of control portion of gain 212.
As shown in fig. 6, diaphragm control unit 214 performs aperture the brightness target value and adjust gain control unit of on-off action
The brightness target value of 212 yield value is set to different from each other.That is, the aperture action desired value under general environment is respectively specified that
With the gain target value under dark situation, make the minimized section that control portion of gain 212 overlappingly acts using two desired values.
In an embodiment of the present invention, the brightness target value of aperture execution on-off action is set higher than to the situation of gain target value
Exemplified by illustrate.
Fig. 7 is the figure of the gain control action of the control portion of gain 212 in the diaphragm control unit 214 for illustrating Fig. 2.
Diaphragm control unit 214 controls the responsiveness of control portion of gain 212 as shown in Figure 7.That is, diaphragm control unit
214 utilizations add（Up）Fast register and drop（Down）Fast register is controlled, wherein, accelerate register to utilize and be stored in
The data of internal register 215 are to the responsiveness of the increased part of the adjust gain of control portion of gain 212, reduction of speed register energy
Responsiveness of enough data using the register 215 for being stored in inside to the part of the adjust gain reduction of control portion of gain 212.
For example, in order that the interference between diaphragm control unit 214 and control portion of gain 212 minimizes, the setting of diaphragm control unit 214 is deposited
The value of device 215, so as to make the renewal speed of control portion of gain 212 when accelerating it is minimum, in reduction of speed when it is maximum.
Fig. 8 and Fig. 9 is the detailed circuit diagram for the drive division 230 for being related to Fig. 2.
The method of control aperture is broadly divided into two kinds.That is, as shown in figure 8, drive division 230 utilizes imaging sensor 210
Signal of video signal control automatic diaphragm lens（Hereinafter referred to as aperture）100 mode, or as shown in figure 9, according to from figure
The mode of aperture 100 is controlled as the pulse signal of the application of sensor 210.
First, Fig. 8 represents to control the on-off action of aperture 100 using the signal of video signal applied from imaging sensor 210
Mode.
Drive division 230 includes resistance R1, comparator A1, capacitor C1 and variable resistor VR1.Here, resistance R1 connections
Between the output end of imaging sensor 210 and node ND1.In addition, outputs and reference voltage of the comparator A1 to node ND1
REF1 is compared and amplified, and outputting drive voltage V_DRV.Comparator A1 inverting terminal is connected with node ND1, passes through
Non-inverting terminal applies reference voltage REF1.Capacitor C1 is connected between node ND1 and driving voltage V_DRV output ends.Can
Become resistance VR1 to be connected between comparator A1 non-inverting terminal and reference voltage REF1 applications end.
The brighter display of the signal of video signal of drive division 230 is input to, the voltage corresponding with signal of video signal more rises.Separately
Outside, comparator A1 is compared to node ND1 and reference voltage REF1 voltage difference so that corresponding with driving voltage V_DRV
Electric current flow through aperture 100.Aperture 100 can utilize galvanometer（Galvanometer, galvanometer）Composition, and utilize from driving
The driving voltage V_DRV that portion 230 applies controls the action of aperture 100.
For example, in the case where the brightness of signal of video signal is higher than reference voltage REF1, aperture 100 can close, and believe in image
Number brightness be less than reference voltage REF1 in the case of, aperture 100 can be opened.Here, on to comparator A1 non-inverting terminal
The reference voltage REF1 of application, a reference value is set and changed using variable resistor VR1, so as to become turn to it is preferable bright
Degree.
Fig. 9 represents to control the side of the on-off action of aperture 100 using the pulse signal applied from imaging sensor 210
Formula.
Drive division 230 includes resistance R2, comparator A2 and capacitor C2.Here, resistance R2 is connected to diaphragm control unit
Between 214 output end and node ND2.
Using the diaphragm control unit 214 included in imaging sensor 210, to the output pulse signal of drive division 230.Aperture
The difference of control unit 214 and current brightness and the desired brightness of user proportionally determines pulse duty factor（Duty）.In addition,
Diaphragm control unit 214 controls the electric current exported to comparator A2 using above-mentioned pulse duty factor.
In addition, outputs and reference voltage REF2 of the comparator A2 to node ND2 are compared, amplified, and output driving electricity
Press V_DRV.Comparator A2 inverting terminal is connected with node ND2, and applies reference voltage REF2 by non-inverting terminal.Electricity
Container C2 is connected between node ND2 and driving voltage V_DRV output ends.
The reference voltage REF2 for being input to drive division 230 represents reference voltage, can be set as one using register 215
Digital value.In an embodiment of the present invention, reference voltage REF2 may be set to supply voltage（VDD）/ 2 magnitude of voltage.
In addition, comparator A2 to node ND2 compared with reference voltage REF2 voltage difference, to make and driving voltage
Electric current corresponding V_DRV flows through aperture 100.Aperture 100 can utilize galvanometer（Galvanometer, galvanometer）Composition,
The action of aperture 100 is controlled using the driving voltage V_DRV applied from drive division 230.
For example, in the case that high section ratio becomes more in the dutycycle of pulse signal, aperture 100 can close.On the contrary,
In the case that low section ratio becomes more in the dutycycle of pulse signal, aperture 100 can be opened.
Figure 10 embodiment represents to control use in the mode of the on-off action of aperture 100 can power transformation using pulse signal
Hinder VR2 mode.In the embodiment in figure 10, current brightness value is converted to pulse signal by diaphragm control unit 214, and to drive
Dynamic portion 230 exports.
For example, current brighter display, high section becomes more in the dutycycle of pulse signal, when utilizing variable resistor
VR2 make reference voltage REF3 variable and it is consistent with desired brightness when, aperture 100 perform opening and closing action.
That is, using variable resistor VR2 change, the reference voltage REF3 applied to comparator A2 non-inverting terminal can change
Become, and determine to flow through the electric current of comparator A2 inverting terminal using the value.In addition, using comparator A2 output, to beat
Open or close black out circle 100.
Figure 11 to Figure 12 is the detailed circuit diagram and oscillogram of the diaphragm control unit 214 shown in Fig. 2 and Fig. 9.
Diaphragm control unit 214 includes multiple transistor T1, T2.Here, transistor T1 applies end in supply voltage VDD and connect
Ground voltage is connected in series between end.In addition, transistor T1 is applied in control signal x via base terminal, transistor T2 is via base
Extreme son is applied in control signal y.In addition, the node of transistor T1, transistor T2 by common connection end to aperture 100
ND2 output control signals z.Here, transistor T1, T2 can utilize bipolar junction transistor（BJT, Bipolar junction
transistor）Composition.
For example, in the case where diaphragm control unit 214 applies control signal x and control signal y as " 0 " using pulse mode,
For the condition of transistor T2 cut-offs.Accompany with this, in the case of voltage V3s of the control signal z more than node ND2, drive division
230 act to close aperture 100.
On the other hand, the feelings of control signal y and control signal x as " 1 " are applied using pulse mode in diaphragm control unit 214
Under condition, for the condition of transistor T1 cut-offs.Accompany with this, in the case of voltage V3s of the control signal z less than node ND2, drive
Dynamic portion 230 is acted to open aperture 100.
In addition, as the control signal z of diaphragm control unit 214 and less than node ND2 voltage V3, when and be more than node
ND2 voltage V3 situation periodically repeatedly when, for aperture keep it is constant（Hold）Condition.In this case, drive
Portion 230 is acted to make aperture 100 to keep constant state.
I.e., as shown in figure 12, node ND2 voltage V3 with reference voltage REF2（VDD/2）On the basis of, periodically weigh
In the case of multiple high or low state, aperture 100 is the constant state of holding.
Figure 13 is with duty ratio（Duty rate）Show the figure of above-mentioned state.Reference picture 13, it is high level in voltage V3
It is the state that aperture 100 is opened in the state of voltage V3 is low level for the state of the closing of aperture 100 under state.Now,
In the pulse section that voltage V3 keeps high level state, aperture 100 maintains to keep constant state.This aperture 100 moves
Making state can be represented by equation below.
[formula 1]
（yt-ym）×（Aperture speed）
Here, yt represents desired brightness, ym represents present intensity, and the responsiveness of aperture can be by register
215 set.
In the case of application above-mentioned [formula 1], before the desired brightness of application, it may occur that aperture 100 is kept
Constant situation.In order to make up this problem, it is also necessary to extra error correction is carried out, and can be by such as to this control mode
Under formula performance.
[formula 2]
（yt-ym）×（Aperture speed）+ error dutycycle=final dutycycle
In above-mentioned [formula 2], error dutycycle is that accumulative value is carried out to the difference of desired brightness and present intensity,
For error correction.
That is, it is negative in final dutycycle when final dutycycle is considered " 0 "（-）In the case of value, to control signal x
Side export pulse and to control signal y sides outputting logic data " 0 ".On the other hand, in final dutycycle for just（+）The situation of value
Under, to the output pulse of control signal y sides to control signal x sides outputting logic data " 1 ".
So, according to the symbol of the negative, positive of final dutycycle, to judge which into control signal x, control signal y
Side exports pulse.That is, the duty ratio of the pulse of voltage V3 high and low level is determined according to the size of final dutycycle.
Figure 14 is for the flow chart for the action for illustrating the diaphragm control unit 214 shown in Fig. 9 and Figure 10.
In fig. 14,（A）To use reference voltage REF2 mode the control mode such as Fig. 9,（B）For such as Figure 10
Control mode uses variable resistor VR2 mode like that.
First, in the case of using Fig. 9 control mode, diaphragm control unit 214 obtains present intensity and desired
The difference of brightness（Step S1）.Afterwards, the responsiveness of aperture is multiplied by the value obtained in step S1（Step S2）.In addition, utilize
The value obtained in step S1 performs the amendment of error dutycycle（Step S3）.Then, the value and step that will be obtained in step S2
The error dutycycle correction value obtained in S3 is added（Step S4）.
On the other hand, in the case of using Figure 10 control mode, diaphragm control unit 214 only obtains current brightness value
（Step S5）.
Afterwards, to being set in the pattern of register 215（mode）Differentiated and selected（A）Mode or selection（B）Mode
（Step S6）.For example, in the case where mode value is " 0 ", selection（A）Mode, and generate duty ratio（Step S7）.The opposing party
Face, in the case where mode value is " 1 ", selection（B）Mode, and generate duty ratio（Step S7）.Afterwards, diaphragm control unit 214
The pulse signal corresponding with the duty ratio generated is exported to drive division 230 to control the action of aperture（Step S8）.
Claims (11)
- A kind of 1. imaging sensor, it is characterised in that including：Pattern matrix, receives the video image signal of subject, and is converted to digital image data；Control portion of gain, control the gain of the digital image data；Register, store the setting data for the action of aperture and the yield value of the control portion of gain；AndDiaphragm control unit, the data with being stored in the register accordingly generate pulse signal, the pulse signal For independently controlling the action of the aperture and the responsiveness of the control portion of gain,The diaphragm control unit will be multiplied by the dynamic of aperture to the difference of present intensity and the object brightness for being stored in the register Make speed and add pulse duty factor of the error dutycycle as the pulse signal,In the case where illumination is low, the gain is controlled in a manner of the time that the diaphragm control unit is opened to be slower than the aperture The responsiveness of control unit, in the case of the illumination height, the diaphragm control unit is to be faster than the situation that the aperture is closed Mode control the responsiveness of the control portion of gain.
- 2. imaging sensor according to claim 1, it is characterised in that described image sensor is CMOS Semiconductor image sensor.
- 3. imaging sensor according to claim 1, it is characterised in that the diaphragm control unit is based on being stored in described post The target brightness value of storage, to control the pulse duty factor, with and the difference of the present intensity and the object brightness into than Example.
- 4. imaging sensor according to claim 1, it is characterised in that the diaphragm control unit controls the pulse letter Number so that the pulse signal forms the pulse duty factor corresponding with present intensity value.
- 5. imaging sensor according to claim 1, it is characterised in that the diaphragm control unit is included in power voltage terminal The first transistor and second transistor being connected in series between ground voltage terminal, the first transistor and described Second transistor is selectively turned on and accounted for change the pulse according to the combination of the first control signal and the second control signal Empty ratio.
- A kind of 6. camera including imaging sensor, it is characterised in that including：Automatic diaphragm lens, video image signal is shot, and adjust the light quantity injected by aperture；Imaging sensor, receive the video image signal and be converted to digital image data, control the digital image data Gain, generate the action for independently controlling the aperture and the pulse signal of the gain control action；AndDrive division, the driving electricity with the accordingly driving of aperture described in output control of the pulse duty factor of the pulse signal Pressure,Described image sensor includes：Pattern matrix, the video image signal is received, and be converted to the digital image data；Control portion of gain, control the gain of the digital image data；Register, store the setting data for the action of the aperture and the yield value of the control portion of gain；AndDiaphragm control unit, pulse signal, the pulse are accordingly generated with the setting data for being stored in the register Signal is used for action and the responsiveness of the control portion of gain for independently controlling the aperture,The diaphragm control unit will be multiplied by the dynamic of aperture to the difference of present intensity and the object brightness for being stored in the register Make speed and add pulse duty factor of the error dutycycle as the pulse signal,In the case where illumination is low, the gain is controlled in a manner of the time that the diaphragm control unit is opened to be slower than the aperture The responsiveness of control unit, in the case of the illumination height, the diaphragm control unit is to be faster than the situation that the aperture is closed Mode control the responsiveness of the control portion of gain.
- 7. the camera according to claim 6 including imaging sensor, it is characterised in that described image sensor is Cmos image sensor.
- 8. the camera according to claim 6 including imaging sensor, it is characterised in that the diaphragm control unit base The pulse duty factor is controlled in the target brightness value for being stored in the register, with the present intensity and the target The difference of brightness is proportional.
- 9. the camera according to claim 8 including imaging sensor, it is characterised in that the drive division will be with institute State the corresponding voltage of pulse signal and the first reference voltage is compared, and generate the driving voltage.
- 10. the camera according to claim 6 including imaging sensor, it is characterised in that the diaphragm control unit Control the pulse signal so that the pulse signal forms the pulse duty factor corresponding with present intensity value.
- 11. the camera according to claim 10 including imaging sensor, it is characterised in that the drive division bag Include：Comparator, by the voltage corresponding with the pulse signal and the second reference voltage compared with, and generate the driving Voltage；AndVariable resistor, make second reference voltage variable.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130045276A KR101449651B1 (en) | 2013-04-24 | 2013-04-24 | Image sensor and photographing apparatus having the same |
| KR10-2013-0045276 | 2013-04-24 |
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| CN104125409A CN104125409A (en) | 2014-10-29 |
| CN104125409B true CN104125409B (en) | 2017-12-08 |
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| CN201410092316.8A Expired - Fee Related CN104125409B (en) | 2013-04-24 | 2014-03-13 | Imaging sensor and the camera for including it |
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| KR (1) | KR101449651B1 (en) |
| CN (1) | CN104125409B (en) |
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| CN106488142A (en) * | 2016-12-08 | 2017-03-08 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of auto iris signal conversion method and circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101822525A (en) * | 2004-08-30 | 2010-09-08 | 奥林巴斯株式会社 | Endoscope apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08265635A (en) * | 1995-03-20 | 1996-10-11 | Fujitsu General Ltd | Video camera equipment |
| KR100992367B1 (en) * | 2008-12-01 | 2010-11-04 | 삼성전기주식회사 | Method for controlling auto exposure |
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|---|---|---|---|---|
| CN101822525A (en) * | 2004-08-30 | 2010-09-08 | 奥林巴斯株式会社 | Endoscope apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 基于CMOS图像传感器的宽动态、低照度一体化摄像机的设计;田书成;《基于CMOS图像传感器的宽动态、低照度一体化摄像机的设计》;20101015;正文第6页-第48页，图3-1,图3-2 * |
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| CN104125409A (en) | 2014-10-29 |
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