CN105516699B - Imaging sensor and its imaging method, imaging device and electronic installation - Google Patents
Imaging sensor and its imaging method, imaging device and electronic installation Download PDFInfo
- Publication number
- CN105516699B CN105516699B CN201510964089.8A CN201510964089A CN105516699B CN 105516699 B CN105516699 B CN 105516699B CN 201510964089 A CN201510964089 A CN 201510964089A CN 105516699 B CN105516699 B CN 105516699B
- Authority
- CN
- China
- Prior art keywords
- conversion gain
- sensor
- imaging
- described image
- image sensor
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
- H04N23/12—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths with one sensor only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
Abstract
The invention discloses a kind of imaging sensor and its imaging method, imaging device and electronic installation, imaging sensor includes：Pixel unit array, pixel unit array include multiple pixel cells, each pixel cell, including：N number of sensor devices, the anode electrode of N number of sensor devices are grounded；Transfer tube, a termination electrode of transfer tube are connected to the cathode electrode of N number of sensor devices；Source follower, the grid of source follower are connected to another termination electrode of transfer tube；Conversion gain adjusting module, conversion gain adjusting module include multiple electric capacity being connected with the grid of source follower, and conversion gain adjusting module is used for the quantity for adjusting the electric capacity being connected with the grid of source follower；The optical filter being arranged on above pixel unit array, optical filter include the filter unit array with multiple filter units, each filter unit one pixel cell of corresponding covering.The imaging sensor prevents image to highlight fractional saturation, increases the pixel sensitivity of half-light environment.
Description
Technical field
The present invention relates to technical field of imaging, more particularly to a kind of imaging sensor and its imaging method, imaging device and
Electronic installation.
Background technology
As handset image sensor pixel quantity is more and more, it is more and more stronger to reduce the ability of picture detail, but simultaneously
Because imaging sensor gross area size increases without actual, increase number of pixels be using sacrifice the size of single photosensitive pixel as
Cost, mobile phone is caused to be shot under half-light limited in one's ability.
Under conditions of half-light or instantaneous exposure, the performance of the sensitivity of imaging sensor plays leading role.Therefore, exist
Under appropriate scene, image resolution ratio can be reduced to exchange the photosensitive property of imaging sensor for.
On the other hand, the mode of potting gum is employed in correlation technique, such as：By adjacent 4 in 16MP imaging sensors
For the potting gum of identical filtered color into 1 pixel, this technological merit can lift image sensor signal noise ratio, shortcoming be
In the case of amount of ambient light abundance, easy overexposure, cause highlighted fractional saturation.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.
Therefore, the present invention needs to propose a kind of imaging sensor, the imaging sensor prevents image to highlight fractional saturation,
Increase the pixel sensitivity of half-light environment.
Second object of the present invention is to propose a kind of imaging method of imaging sensor.
Third object of the present invention is to propose a kind of imaging device.
Fourth object of the present invention is to propose a kind of electronic installation.
To achieve these goals, the imaging sensor of first aspect present invention embodiment, including：Pixel unit array,
The pixel unit array includes multiple pixel cells, each pixel cell, including：N number of sensor devices, N number of sense
The anode electrode of optical device is grounded；Transfer tube, a termination electrode of the transfer tube are connected to the negative electrode of N number of sensor devices
Electrode；Source follower, the grid of the source follower are connected to another termination electrode of the transfer tube；Conversion gain adjusts
Module, the conversion gain adjusting module include the electric capacity that multiple grids with the source follower are connected, and the conversion increases
Beneficial adjusting module is used for the quantity for adjusting the electric capacity being connected with the grid of the source follower；It is arranged on the pixel cell battle array
The optical filter of top is arranged, the optical filter includes the filter unit array with multiple filter units, each filter unit pair
A pixel cell should be covered.
Imaging sensor according to embodiments of the present invention, adjusted by conversion gain adjusting module and be connected with source follower
The quantity of electric capacity change the conversion gain of pixel cell, so as to change the sensitivity of pixel cell, to meet different scenes
Light exposure, image caused by can preventing overexposure highlights fractional saturation, can also increase the pixel sensitivity of half-light environment
Degree, so as to lift the shooting effect under half-light.
In one embodiment of the invention, the conversion gain adjusting module includes：Multiple conversion gain units, each
The conversion gain unit includes a switch and switchs the electric capacity connected with described, and one end of the switch is connected to the biography
Another termination electrode of defeated pipe, the other end of the switch are connected to one end of the electric capacity, the other end ground connection of the electric capacity.
In one embodiment of the invention, four filter units of arranged adjacent include red filter unit, two
Individual green filter unit and a blue filter unit.
In one embodiment of the invention, in addition to：The lens array being arranged on above the filter unit array, institute
Lens array is stated to be used for the sensor devices below light collection to the filter unit array.
In one embodiment of the invention, the lens array includes multiple lenticules, each lenticule and an institute
Sensor devices are stated to be correspondingly arranged.
In one embodiment of the invention, the sensor devices are photoelectric diode.
In one embodiment of the invention, wherein, N=4.
In order to solve the above-mentioned technical problem, the imaging sensor based on first aspect present invention embodiment, the present invention second
The imaging method of the imaging sensor of aspect embodiment, comprises the following steps：Obtain the ring that described image sensor is presently in
Border brightness；The conversion gain of described image sensor pixel cell is controlled according to the ambient brightness, to adjust described image biography
The sensitivity of sensor；The output of described image sensor is read, to generate image.
The imaging method of imaging sensor according to embodiments of the present invention, according to the difference of ambient brightness to imaging sensor
The sensitivity of pixel cell be adjusted, can both prevent high-brghtness picture images saturation, the picture under half-light environment can be increased again
Plain sensitivity, so as to obtain more preferably signal noise ratio, picture quality is improved, and then improve Consumer's Experience.
In one embodiment of the invention, it is described that described image sensor pixel cell is controlled according to the ambient brightness
Conversion gain, specifically include：Judge the grade for the ambient brightness that described image sensor is presently in；It is bright according to the environment
The grade of degree and the preset relation of conversion gain adjust the conversion gain of described image sensor pixel cell to respective value, its
In, the grade of the ambient brightness and the preset relation of conversion gain are inversely prroportional relationship.
In one embodiment of the invention, in addition to：Conversion to all pixels unit in described image sensor increases
Benefit synchronizes regulation.
In one embodiment of the invention, in addition to：To in described image sensor by the filter unit of different colours
The conversion gain of the pixel cell covered is adjusted respectively.
In one embodiment of the invention, it is described that described image sensor pixel cell is controlled according to the ambient brightness
Conversion gain include：Described image is controlled by adjusting the capacitance for the electric capacity being connected with the grid of the source follower
The conversion gain of sensor pixel cell.
To achieve these goals, the imaging device of third aspect present invention embodiment, including first aspect present invention are real
Apply the imaging sensor of example；The control module being connected with described image sensor, the control module are used to obtain described image
The ambient brightness that sensor is presently in, and control the conversion of described image sensor pixel cell to increase according to the ambient brightness
Benefit, to adjust the sensitivity of described image sensor；And the image processing module being connected with described image sensor, the figure
As output of the processing module for reading described image sensor, to generate image.
Imaging device according to embodiments of the present invention, control module is according to the different picture to imaging sensor of ambient brightness
The sensitivity of plain unit is adjusted, and can both prevent high-brghtness picture images saturation, can increase the pixel spirit under half-light environment again
Sensitivity, so as to obtain more preferably signal noise ratio, picture quality is improved, and then improve Consumer's Experience.
In one embodiment of the invention, the control module, is specifically used for：Judge the current institute of described image sensor
The grade of the ambient brightness at place, and sensed described image according to the grade of the ambient brightness and the preset relation of conversion gain
The conversion gain of device pixel cell is adjusted to respective value, wherein, the grade of the ambient brightness and the preset relation of conversion gain
For inversely prroportional relationship.
In one embodiment of the invention, the control module, is additionally operable to：To all pixels in described image sensor
The conversion gain of unit synchronizes regulation.
In one embodiment of the invention, the control module, is additionally operable to：To in described image sensor by different face
The conversion gain for the pixel cell that the filter unit of color is covered is adjusted respectively.
In one embodiment of the invention, the control module is connected by adjusting with the grid of the source follower
The capacitance of electric capacity control the conversion gain of described image sensor pixel cell.
To achieve these goals, the electronic installation of fourth aspect present invention embodiment, including third aspect present invention are real
Apply the imaging device of example.
Electronic installation according to embodiments of the present invention, due to being provided with the imaging device, take pictures Shi Jike to prevent
Only high-brghtness picture images saturation, the pixel sensitivity under half-light environment can be increased again, so as to obtain more preferably signal noise ratio, carried
Picture quality has been risen, and then has improved Consumer's Experience.
In one embodiment of the invention, the electronic installation is mobile phone or tablet personal computer.
Brief description of the drawings
Fig. 1 is the block diagram of imaging sensor according to an embodiment of the invention；
Fig. 2 is the schematic diagram of optical filter according to an embodiment of the invention；
Fig. 3 is the circuit diagram of a pixel cell according to an embodiment of the invention；
Fig. 4 is the structural representation of imaging sensor according to an embodiment of the invention；
Fig. 5 is the flow chart of the imaging method of imaging sensor according to an embodiment of the invention；
Fig. 6 is the block diagram of imaging device according to an embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the imaging sensor of the embodiment of the present invention, the imaging method of imaging sensor, imaging dress are described
Put and electronic installation.
Fig. 1 is the block diagram of imaging sensor according to an embodiment of the invention.As shown in figure 1, the present invention is real
The imaging sensor 10 of example is applied, including：Pixel unit array 11 and the optical filter 12 for being arranged on the top of pixel unit array 11.
Pixel unit array 11 includes multiple pixel cells 111, and each pixel cell 111 includes：N number of sensor devices 14,
Transfer tube 15, source follower 16 and conversion gain adjusting module 17.
The anode electrode of N number of sensor devices 14 is grounded；One termination electrode of transfer tube 15 is connected to N number of sensor devices 14
Cathode electrode；The grid of source follower 16 is connected to another termination electrode of transfer tube 15；Conversion gain adjusting module 17 includes
The electric capacity 1711 that multiple grids with source follower 16 are connected, conversion gain adjusting module 17 is used to adjust and source follower
The quantity of the connected electric capacity 1711 of 16 grid.
In one embodiment of the invention, sensor devices 14 are photodiode.
Optical filter 12 includes the filter unit array 121 with multiple filter units 1211, each filter unit 1211
One pixel cell 111 of corresponding covering.
Below in conjunction with accompanying drawing 2 and accompanying drawing 3, it is described in detail by taking N=4 as an example.
Referring to Fig. 2, Fig. 2 show the schematic diagram of filter unit array 121, the corresponding covering one of a filter unit 1211
Individual pixel cell 111, i.e. a filter unit 1211 cover four sensor devices 14 in a pixel cell 111.In Fig. 2
In, Gr, R, B, Gb are respectively used to identify the color of filter unit 1211, and numeral 1,2,3,4 is used to identify under filter unit 1211
The position of four sensor devices 14 just covered.Specifically, R is used for the filter unit 1211 for identifying red, and B is used to identify blueness
Filter unit 1211, Gr, Gb be used for identify green filter unit 1211.
In one embodiment of the invention, four filter units 1211 of arranged adjacent include a red filter unit
1211st, two green filter units 1211 and a blue filter unit 1211.That is, four of the arranged adjacent lists that filter
Member 1211 collectively forms one group of filtering structure 1212.
It should be noted that the filter unit 1211 of four sensor devices 14 of covering can be integrated construction, or by four
Individual independent filter set load is connected together.Preferably, filter unit 1211 is integrated construction in the embodiment of the present invention.
Referring to Fig. 3, Fig. 3 is by taking the pixel cell 111 that covers of filter unit 1211 by red as an example, four sensor devices
14 cathode electrode is connected after linking together with a termination electrode of transfer tube 15, and another termination electrode of transfer tube 15 is connected to source
The gate electrode of pole follower 16.Another termination electrode and source follower with transfer tube 15 respectively of conversion gain adjusting module 17
16 gate electrode is connected.
With 16M imaging sensor for example, the imaging sensor of the embodiment of the present invention is by four adjacent identical face
The potting gum of color, equivalent to the size for increasing pixel, improves pixel sensitivity, the embodiment of the present invention for a pixel
An imaging sensor pixel cell also after merging logic circuit on add multistage CG, by control CG switch come
Different conversion gain values is obtained, so as to obtain different sensitivity, and then meets the light exposure of different scenes, can prevent
Image caused by degree exposure highlights fractional saturation, can also increase the pixel sensitivity of half-light environment, so as to be lifted under half-light
Shooting effect.
In one embodiment of the invention, conversion gain adjusting module 17 includes：Multiple conversion gain units 171, often
Individual conversion gain unit 171 includes 1710 (S) of switch and the electric capacity 1711 (CG) connected with switch 1710, switchs 1710
One end is connected to another termination electrode of transfer tube 15, and the other end for switching 1710 is connected to one end of electric capacity 1711, electric capacity 1711
The other end ground connection.
Specifically, the electric capacity being connected with the grid of source follower 16 is adjusted by adjusting the number of the closure of switch 1710
Capacitance, so as to adjust the conversion gain of pixel cell 111.
More specifically, the ambient brightness that can be presently in imaging sensor is divided into several grades, it is different grades of
Brightness corresponds to different pixel sensitivities.For example, when ambient brightness is higher, the number of the closure of switch 1710 is also more, with source electrode
The capacitance of the connected electric capacity of the grid of follower 16 is bigger, and conversion gain is with regard to smaller, so as to reduce the spirit of pixel cell 111
Sensitivity, fractional saturation problem is highlighted with image caused by preventing overexposure.In another example when ambient brightness is lower, switch 1710
The number of closure is also fewer, and the capacitance for the electric capacity being connected with the grid of source follower 16 is smaller, and conversion gain is bigger, from
And the sensitivity of pixel cell 111 is improved, to lift the shooting effect under half-light.
In one embodiment of the invention, referring to Fig. 4, imaging sensor 10 also includes：It is arranged on filter unit battle array
The lens array 19 of the top of row 121, lens array 19 are used for the sensor devices to the lower section of filter unit array 121 by light collection
On 14, to lift the light reception intensity of sensor devices 14, so as to improve image quality.Wherein, lens array 19 includes multiple micro-
Mirror 191, each lenticule 191 are correspondingly arranged with a sensor devices 14.
The imaging sensor of the embodiment of the present invention, the electricity being connected by the adjustment of conversion gain adjusting module with source follower
The quantity of appearance changes the conversion gain of pixel cell, so as to change the sensitivity of pixel cell, to meet the exposure of different scenes
Light quantity, image caused by can preventing overexposure highlight fractional saturation, can also increase the pixel sensitivity of half-light environment, from
And lift the shooting effect under half-light.
Imaging sensor based on above-described embodiment, the present invention propose a kind of imaging method of imaging sensor.
Fig. 5 is the flow chart of the imaging method of imaging sensor according to an embodiment of the invention.As shown in figure 5, this
The imaging method of the imaging sensor of inventive embodiments, comprises the following steps：
S1, obtain the ambient brightness that imaging sensor is presently in.
It is, obtain the brightness of the present filming scene of imaging sensor.
S2, the conversion gain of image sensor pixel cells is controlled according to ambient brightness, to adjust the spirit of imaging sensor
Sensitivity.
Specifically, when ambient brightness is higher, the image that is obtained by imaging sensor easily occurs over-exposed, high
The problem of bright part saturation, therefore, it is necessary to the sensitivity of imaging sensor is turned down, to prevent the appearance of the problem；And work as ring
When border brightness is relatively low, the shooting of imaging sensor is limited in one's ability, then needs to heighten sensitivity, to lift picture quality.
In one embodiment of the invention, the conversion gain of image sensor pixel cells is controlled according to ambient brightness,
Specifically include：Judge the grade for the ambient brightness that imaging sensor is presently in；According to the grade and conversion gain of ambient brightness
Preset relation the conversion gain of image sensor pixel cells is adjusted to respective value, wherein, the grade of ambient brightness with turn
The preset relation for changing gain is inversely prroportional relationship.
Specifically, ambient brightness imaging sensor being presently in is divided into several grades, and each grade is corresponding different
Conversion gain, i.e., different ambient light levels correspond to different pixel sensitivities.Wherein, the grade of ambient brightness and conversion
The preset relation of gain is：The higher grade of ambient brightness, and its corresponding conversion gain is smaller, that is, correspondence image sensor
Sensitivity it is lower.
In one embodiment of the invention, the conversion gain bag of image sensor pixel cells is controlled according to ambient brightness
Include：The conversion of image sensor pixel cells is controlled by adjusting the capacitance for the electric capacity being connected with the grid of source follower
Gain.
For example, when ambient brightness is higher, the electric capacity that the number of closure is also more, is connected with the grid of source follower is switched
Capacitance it is bigger, conversion gain is with regard to smaller, so as to reduce the sensitivity of pixel cell, to prevent figure caused by overexposure
Image height bright part saturation problem.In another example when ambient brightness is lower, it is also fewer to switch the number of closure, with source follower
The capacitance of the connected electric capacity of grid is smaller, and conversion gain is bigger, dark to be lifted so as to improve the sensitivity of pixel cell
Shooting effect under light.
In one embodiment of the invention, in addition to：The conversion gain of all pixels unit in imaging sensor is entered
Row is adjusted in synchronism.
Specifically, regulation is synchronized to the conversion gain of pixel cell all in imaging sensor device, that is to say, that
Under same ambient light levels, the conversion gain of the pixel cell covered by the filter unit of different colours is identical, i.e.,
The number of the switch of closure is identical.
In another embodiment of the present invention, in addition to：To in imaging sensor by the filter unit institute of different colours
The conversion gain of the pixel cell of covering is adjusted respectively.
Specifically, by pixel cell is covered by the filter unit of different colours, then can be according to the difference of color
The conversion gain of difference adjustment pixel cell, so as to preferably lift picture quality.
The pixel cell covered by the filter unit of green is referred to as green pixel cell, because green pixel cell more holds
Easy saturation, then when the conversion gain to green pixel cell is adjusted, its conversion gain can be adjusted to than other
The pixel cell of color it is lower.For example, under same ambient brightness, by the switch closure 2 in red pixel cell, and
Switch in green pixel cell is closed 3, that is, by the sensitivity adjustment of green pixel cell to than red pixel list
Member is low.
S3, the output of imaging sensor is read, to generate image.
Specifically, the sensitivity of imaging sensor is dynamically adjusted according to ambient brightness, can prevent high-brghtness picture images from satisfying
With can also increase the pixel sensitivity under half-light environment, so as to obtain more preferably signal noise ratio, improve picture quality.
The imaging method of the imaging sensor of the embodiment of the present invention, according to the different pictures to imaging sensor of ambient brightness
The sensitivity of plain unit is adjusted, and can both prevent high-brghtness picture images saturation, can increase the pixel spirit under half-light environment again
Sensitivity, so as to obtain more preferably signal noise ratio, picture quality is improved, and then improve Consumer's Experience.
In order to realize above-described embodiment, the invention also provides a kind of imaging device.
Fig. 6 is the block diagram of imaging device according to an embodiment of the invention.As shown in fig. 6, the present invention is implemented
The imaging device 100 of example, including：Imaging sensor 10, the control module 20 being connected with imaging sensor 10 and and image sensing
The connected image processing module 30 of device 10.
Control module 20 is used to obtain the ambient brightness that imaging sensor 10 is presently in, and according to ambient brightness control figure
As the conversion gain of the pixel cell of sensor 10, to adjust the sensitivity of imaging sensor.
Image processing module 30 is used for the output for reading imaging sensor 10, to generate image.
In one embodiment of the invention, control module 20 is specifically used for：Judge what imaging sensor 10 was presently in
The grade of ambient brightness, and according to the grade of ambient brightness and the preset relation of conversion gain by the pixel cell of imaging sensor 10
Conversion gain adjust to respective value, wherein, the grade of ambient brightness and the preset relation of conversion gain are inversely prroportional relationship.
Specifically, when ambient brightness is higher, the image that is obtained by imaging sensor 10 easily occur it is over-exposed,
The problem of highlighted fractional saturation, therefore, it is necessary to the sensitivity of imaging sensor 10 is turned down, to prevent the appearance of the problem；And
When ambient brightness is relatively low, the shooting of imaging sensor 10 is limited in one's ability, then needs to heighten sensitivity, to lift image matter
Amount.
More specifically, the ambient brightness that imaging sensor 10 is presently in is divided into several grades, each grade is corresponding
Different conversion gains, i.e., different ambient light levels correspond to different pixel sensitivities.Wherein, the grade of ambient brightness with
The preset relation of conversion gain is：The higher grade of ambient brightness, and its corresponding conversion gain is smaller, that is, correspondence image passes
The sensitivity of sensor 10 is lower.
In one embodiment of the invention, control module 20 is by adjusting the electric capacity being connected with the grid of source follower
Capacitance control the conversion gain of the pixel cell of imaging sensor 10.
For example, when ambient brightness is higher, the number of the controlling switch 1710 of control module 20 closure is also more, is followed with source electrode
The capacitance of the connected electric capacity of the grid of device is bigger, and conversion gain is with regard to smaller, so as to reduce the sensitivity of pixel cell 111,
Fractional saturation problem is highlighted with image caused by preventing overexposure.In another example when ambient brightness is lower, control module 20 controls
The number of the closure of switch 1710 is also fewer, and the capacitance for the electric capacity being connected with the grid of source follower 16 is smaller, conversion gain
It is bigger, so as to improve the sensitivity of pixel cell 111, to lift the shooting effect under half-light.
In one embodiment of the invention, control module 20 is additionally operable to：To all pixels unit in imaging sensor 10
Conversion gain synchronize regulation.
Specifically, control module 20 synchronizes tune to the conversion gain of pixel cell all in imaging sensor device 10
Section, that is to say, that under same ambient light levels, the conversion gain of the pixel cell covered by the filter unit of different colours
It is identical, that is, the number of the switch closed is identical.
In another embodiment of the present invention, control module 20 is additionally operable to：To in imaging sensor 10 by different colours
The conversion gain of pixel cell that is covered of filter unit be adjusted respectively.
Specifically, by pixel cell is covered by the filter unit of different colours, then control module 20 can basis
The conversion gain of the different difference adjustment pixel cells of color, so as to preferably lift picture quality.
The pixel cell covered by the filter unit of green is referred to as green pixel cell, because green pixel cell more holds
Easy saturation, then control module 20, can be by its conversion gain when the conversion gain to green pixel cell is adjusted
It is adjusted to the lower of the pixel cell than other colors.For example, under same ambient brightness, by the switch in red pixel cell
Closure 2, and by green pixel cell switch close 3, that is, by the sensitivity adjustment of green pixel cell to than
Red pixel cell is low.
The imaging device of the embodiment of the present invention, control module is according to the different pixel list to imaging sensor of ambient brightness
The sensitivity of member is adjusted, and can both be prevented high-brghtness picture images saturation, can be increased the pixel sensitivity under half-light environment again,
So as to obtain more preferably signal noise ratio, picture quality is improved, and then improve Consumer's Experience.
Based on the imaging device 100 in above-described embodiment, the invention also provides a kind of electronic installation 200, electronics dress
Putting 200 includes the imaging device 100 of the embodiment of the present invention.
In one embodiment of the invention, electronic installation 200 is mobile phone or tablet personal computer.
The electronic installation of the embodiment of the present invention, due to being provided with the imaging device, height can be both prevented when being taken pictures
Luminance picture saturation, the pixel sensitivity under half-light environment can be increased again, so as to obtain more preferably signal noise ratio, improved
Picture quality, and then improve Consumer's Experience.
In the description of the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as indicating or implies relative importance or imply the quantity of the technical characteristic indicated by indicating.Thus, define " the
One ", at least one this feature can be expressed or be implicitly included to the feature of " second ".In the description of the invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (18)
- A kind of 1. imaging sensor, it is characterised in that including：Pixel unit array, the pixel unit array include multiple pixel cells, each pixel cell, including：N number of sensor devices, the anode electrode of N number of sensor devices are grounded；Transfer tube, a termination electrode of the transfer tube are connected to the cathode electrode of N number of sensor devices；Source follower, the grid of the source follower are connected to another termination electrode of the transfer tube；Conversion gain adjusting module, the conversion gain adjusting module include what multiple grids with the source follower were connected Electric capacity, the conversion gain adjusting module are used for the quantity for adjusting the electric capacity being connected with the grid of the source follower, wherein,The cathode electrode of N number of sensor devices is connected after linking together with a termination electrode of the transfer tube, the conversion Gain regulation module is connected with another termination electrode of the transfer tube and the gate electrode of the source follower respectively；The conversion gain adjusting module includes：Multiple conversion gain units, each conversion gain unit are opened including one Close and switch the electric capacity connected with described, one end of the switch is connected to another termination electrode of the transfer tube, the switch The other end be connected to one end of the electric capacity, the other end ground connection of the electric capacity, wherein, ambient brightness is divided into multiple etc. Level, different grades of ambient brightness correspond to different pixel sensitivities；The higher grade of ambient brightness, and the number for switching closure is got over More, the capacitance for the electric capacity being connected with the grid of the source follower is bigger, and conversion gain is smaller, to reduce pixel cell Sensitivity；The lower grade of ambient brightness, switchs the electric capacity that the number of closure is fewer, is connected with the grid of the source follower Capacitance it is smaller, conversion gain is bigger, to improve the sensitivity of pixel cell；AndThe optical filter being arranged on above the pixel unit array, the optical filter include the optical filtering list with multiple filter units Element array, each filter unit one pixel cell of corresponding covering.
- 2. imaging sensor as claimed in claim 1, it is characterised in that four filter units of arranged adjacent are red including one Color filter unit, two green filter units and a blue filter unit.
- 3. imaging sensor as claimed in claim 1, it is characterised in that also include：It is arranged on the filter unit array The lens array of side, the lens array are used for the sensor devices below light collection to the filter unit array On.
- 4. imaging sensor as claimed in claim 3, it is characterised in that the lens array includes multiple lenticules, each Lenticule is correspondingly arranged with the sensor devices.
- 5. imaging sensor as claimed in claim 1, it is characterised in that the sensor devices are photoelectric diode.
- 6. imaging sensor as claimed in claim 1, it is characterised in that wherein, N=4.
- 7. the imaging method of a kind of imaging sensor as any one of claim 1-6, it is characterised in that including following Step：Obtain the ambient brightness that described image sensor is presently in；The conversion gain of described image sensor pixel cell is controlled according to the ambient brightness, to adjust described image sensor Sensitivity；AndThe output of described image sensor is read, to generate image.
- 8. the imaging method of imaging sensor as claimed in claim 7, it is characterised in that described according to the ambient brightness control The conversion gain of described image sensor pixel cell processed, is specifically included：Judge the grade for the ambient brightness that described image sensor is presently in；According to the preset relation of the grade of the ambient brightness and conversion gain by the conversion of described image sensor pixel cell Gain-adjusted to respective value, wherein, the grade of the ambient brightness and the preset relation of conversion gain are inversely prroportional relationship.
- 9. the imaging method of imaging sensor as claimed in claim 8, it is characterised in that also include：Regulation is synchronized to the conversion gain of all pixels unit in described image sensor.
- 10. the imaging method of imaging sensor as claimed in claim 8, it is characterised in that also include：The conversion gain of pixel cell to being covered in described image sensor by the filter unit of different colours is carried out respectively Regulation.
- 11. the imaging method of the imaging sensor as any one of claim 7-10, it is characterised in that described according to institute Stating the conversion gain of ambient brightness control described image sensor pixel cell includes：Described image sensor pixel is controlled by adjusting the capacitance for the electric capacity being connected with the grid of the source follower The conversion gain of unit.
- 12. a kind of imaging device, it is characterised in that including：Such as the imaging sensor any one of claim 1-6；The control module being connected with described image sensor, the control module are presently in for obtaining described image sensor Ambient brightness, and according to the ambient brightness control described image sensor pixel cell conversion gain, with described in regulation The sensitivity of imaging sensor；AndThe image processing module being connected with described image sensor, described image processing module are used to read described image sensor Output, to generate image.
- 13. imaging device as claimed in claim 12, it is characterised in that the control module, be specifically used for：Judge the grade for the ambient brightness that described image sensor is presently in, and the grade according to the ambient brightness and conversion The preset relation of gain adjusts the conversion gain of described image sensor pixel cell to respective value, wherein, the environment is bright The grade of degree and the preset relation of conversion gain are inversely prroportional relationship.
- 14. imaging device as claimed in claim 13, it is characterised in that the control module, be additionally operable to：Regulation is synchronized to the conversion gain of all pixels unit in described image sensor.
- 15. imaging device as claimed in claim 13, it is characterised in that the control module, be additionally operable to：The conversion gain of pixel cell to being covered in described image sensor by the filter unit of different colours is carried out respectively Regulation.
- 16. such as the imaging device any one of claim 12-15, it is characterised in that the control module passes through adjustment The capacitance for the electric capacity being connected with the grid of the source follower control the conversion of described image sensor pixel cell increase Benefit.
- 17. a kind of electronic installation, it is characterised in that including the imaging device as any one of claim 12-16.
- 18. electronic installation as claimed in claim 17, it is characterised in that the electronic installation is mobile phone or tablet personal computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510964089.8A CN105516699B (en) | 2015-12-18 | 2015-12-18 | Imaging sensor and its imaging method, imaging device and electronic installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510964089.8A CN105516699B (en) | 2015-12-18 | 2015-12-18 | Imaging sensor and its imaging method, imaging device and electronic installation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105516699A CN105516699A (en) | 2016-04-20 |
| CN105516699B true CN105516699B (en) | 2017-11-24 |
Family
ID=55724294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510964089.8A Active CN105516699B (en) | 2015-12-18 | 2015-12-18 | Imaging sensor and its imaging method, imaging device and electronic installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105516699B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106097899B (en) * | 2016-06-14 | 2019-04-23 | 上海中航光电子有限公司 | A kind of display and head-mounted display apparatus |
| CN106373495A (en) * | 2016-11-10 | 2017-02-01 | 昆山国显光电有限公司 | Organic light emitting diode (OLED) display device |
| WO2022016385A1 (en) * | 2020-07-21 | 2022-01-27 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method of generating corrected pixel data, electrical device and non-transitory computer readable medium |
| CN112672060B (en) * | 2020-12-29 | 2022-09-02 | 维沃移动通信有限公司 | Shooting method and device and electronic equipment |
| CN113709333B (en) * | 2021-07-21 | 2023-07-11 | 维沃移动通信有限公司 | Image sensor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916084A (en) * | 2012-12-28 | 2014-07-09 | 北京中电华大电子设计有限责任公司 | Gain adjustable low noise amplifier circuit |
| CN103531603B (en) * | 2013-10-30 | 2018-10-16 | 上海集成电路研发中心有限公司 | A kind of cmos image sensor |
| CN103780850B (en) * | 2014-01-30 | 2017-12-15 | 上海集成电路研发中心有限公司 | Pixel divides with merging imaging sensor and its method for transmitting signals |
| CN104486602B (en) * | 2014-12-29 | 2018-04-06 | 上海集成电路研发中心有限公司 | A kind of structures and methods realized pixel physics and merged |
| CN104580945B (en) * | 2014-12-29 | 2018-08-10 | 上海集成电路研发中心有限公司 | A kind of image sensor architecture and method for realizing high dynamic range images |
-
2015
- 2015-12-18 CN CN201510964089.8A patent/CN105516699B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105516699A (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105516699B (en) | Imaging sensor and its imaging method, imaging device and electronic installation | |
| TWI524709B (en) | Image capture apparatus, method of controlling image capture apparatus, and electronic device | |
| JP5321163B2 (en) | Imaging apparatus and imaging method | |
| KR102237315B1 (en) | Solid-state imaging device, electronic apparatus, lens control method, and imaging module | |
| US11095830B2 (en) | Image-capturing device and image processing device | |
| CN105578005B (en) | Imaging method, imaging device and the electronic installation of imaging sensor | |
| EP3358820B1 (en) | Imaging device, image processing device and display device | |
| JP4791331B2 (en) | Imaging apparatus and exposure control method | |
| JP5660341B2 (en) | Imaging apparatus and imaging method | |
| US20040041919A1 (en) | Digital camera | |
| JP2019500761A (en) | Calibration of defective image sensor elements | |
| JP5749224B2 (en) | The camera module | |
| CN113711584B (en) | Camera device | |
| EP2161938B1 (en) | Imaging apparatus, imaging method and computer readable recording medium storing programs for executing the imaging method | |
| JP2003259389A (en) | Imaging unit | |
| JP4544319B2 (en) | Image processing apparatus, method, and program | |
| CN106550227B (en) | A kind of image saturation method of adjustment and device | |
| JP2022115944A (en) | Imaging apparatus | |
| JP2008219838A (en) | Imaging apparatus, white balance control device and white balance control method | |
| JP2015005927A (en) | Image processing apparatus and control method of the same | |
| JP4306306B2 (en) | White balance control method and imaging apparatus | |
| JP2010011153A (en) | Imaging apparatus, imaging method and program | |
| CN108353123B (en) | Image capturing apparatus and control method thereof | |
| JP2015192152A (en) | White balance adjustment device, white balance adjustment method and imaging device | |
| JP4081609B2 (en) | Imaging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. Address before: Changan town in Guangdong province Dongguan 523859 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., Ltd. |
|
| CP03 | Change of name, title or address |