CN105578074A - Image sensor and terminal having the same - Google Patents
Image sensor and terminal having the same Download PDFInfo
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- CN105578074A CN105578074A CN201510963293.8A CN201510963293A CN105578074A CN 105578074 A CN105578074 A CN 105578074A CN 201510963293 A CN201510963293 A CN 201510963293A CN 105578074 A CN105578074 A CN 105578074A
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- analog signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/50—Control of the SSIS exposure
- H04N25/57—Control of the dynamic range
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/50—Control of the SSIS exposure
- H04N25/57—Control of the dynamic range
- H04N25/58—Control of the dynamic range involving two or more exposures
- H04N25/581—Control of the dynamic range involving two or more exposures acquired simultaneously
Abstract
The invention discloses an image sensor. The image sensor includes a pixel unit array, amplification conversion units and a filtering array, wherein the pixel unit array includes a plurality of pixel units, the amplification conversion units are used for converting photogenerated charges generated by the pixel units into analog signals; the filtering array is arranged on the pixel unit array and includes a plurality of optical filters, and the optical filters of the same color correspond to the plurality of pixel units; for the plurality of pixels units corresponding to the optical filters of the same color, photogenerated charges generated by each pixel unit of part of the pixel units respectively independently uses an amplification conversion unit to output a first analog signal that is merged, photogenerated charges generated by the pixel units of the rest part are accumulated and an amplification conversion unit is shared to output a second analog signal, and the first analog signal and the second analog signal are different. The image sensor realizes an HDR function based on improvements of hardware. The invention also discloses a terminal having the image sensor.
Description
Technical field
The invention belongs to technical field of image processing, particularly relate to a kind of imageing sensor, and there is the terminal of this imageing sensor.
Background technology
Along with popularizing of mobile phone, become the hobby of more and more people with mobile phone photograph.But along with the raising to requirement of taking pictures, HDR (High-DynamicRange, the high dynamic range) function of the image procossing of mobile phone becomes the demand of user, but, at present, realize HDR function, generally by software simulating, DeGrain.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the present invention needs to propose a kind of imageing sensor, this imageing sensor, by hardware modifications, can promote HDR effect.
The present invention also proposes a kind of terminal adopting this imageing sensor in addition.
In order to solve the problem, one aspect of the present invention proposes a kind of imageing sensor, and this imageing sensor comprises: pixel unit array, comprises multiple pixel cell, amplification converting unit, is converted to analog signal for the photogenerated charge produced by pixel cell, be arranged at the filter array in described pixel unit array, filter array comprises multiple filter, and the described filter of same color corresponds to multiple pixel cell, wherein, multiple pixel cells corresponding to the filter of described same color, the photogenerated charge that in the pixel cell of a part, each pixel cell produces independently uses an amplification converting unit export and merge into the first analog signal, the cumulative rear shared amplification converting unit of photogenerated charge that the pixel cell of remainder produces exports the second analog signal, the all pixel cells exporting described first analog signal are positioned at the same row of these row of described pixel cell, the all pixel cells exporting described second analog signal are positioned at the same row of described pixel unit array, described first analog signal is not identical with described second analog signal.
Imageing sensor of the present invention, the corresponding multiple pixel cell of filter based on same color, and multiple pixel cells analog signal that output two is different after the conversion of amplification converting unit that the filter of same color is corresponding, hardware foundation is provided for realizing HDR function, compared to the software simulating HDR function in correlation technique, this imageing sensor realizes HDR function by hardware modifications, promotes HDR effect.
In some embodiments of the invention, this imageing sensor also comprises: AD conversion unit (ADC, Analog-to-DigitalConverter), for the first analog signal and the second analog signal are converted to the first digital signal and the second digital signal respectively.
In some embodiments of the invention, the multiple pixel cells corresponding to filter of same color are positioned at the different lines of pixel unit array.
In some embodiments of the invention, corresponding 2 row 2 of filter of described same color arrange and amount to 4 pixel cells, the photogenerated charge that 2 pixel cells being arranged in first row produce independently uses an amplification converting unit to export and merges into described first analog signal, the second analog signal is converted to through amplification converting unit after the photogenerated charge that 2 pixel cells being arranged in secondary series produce is cumulative, described first analog signal is converted to described first digital signal by an AD conversion unit, described second analog signal is converted to described second digital signal by another AD conversion unit.
In some embodiments of the invention, above-mentioned imageing sensor also comprises: be arranged on the micro mirror array on described filter array, and each micro mirror in described micro mirror array is corresponding with a described pixel cell.
In some embodiments of the invention, above-mentioned imageing sensor also comprises control module and image processing module, described control module for control described same color filter corresponding to multiple pixel cells expose according to row simultaneously, the output of described image processing module to described AD conversion unit synthesizes to obtain high dynamic range images.
In order to solve the problem, the present invention proposes a kind of terminal on the other hand, and this terminal comprises the imageing sensor described in above-mentioned aspect.
Terminal of the present invention, by adopting described imageing sensor, the hardware configuration based on imageing sensor can realize HDR function, promotes HDR image effect.
In some embodiments of the invention, described imaging terminal comprises mobile phone.
In some embodiments of the invention, described imaging terminal also comprises the central processing unit and display unit that are connected with described imageing sensor, and described central processing unit shows the high dynamic range images of described imageing sensor output for controlling described display unit.
In some embodiments of the invention, described terminal comprises the central processing unit and external memory that are connected with described imageing sensor, and described central processing unit stores the high dynamic range images of described imageing sensor output for controlling described external memory.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of imageing sensor according to an embodiment of the invention;
Fig. 2 is the schematic diagram of imageing sensor according to another embodiment of the invention;
Fig. 3 is the distribution schematic diagram of the filter plate according to a specific embodiment of the present invention;
Fig. 4 is the circuit diagram of imageing sensor according to an embodiment of the invention;
Fig. 5 is the block diagram of imageing sensor according to still another embodiment of the invention;
Fig. 6 is the block diagram of terminal according to an embodiment of the invention;
Fig. 7 is the block diagram of terminal according to another embodiment of the invention; And
Fig. 8 is the block diagram of terminal according to still a further embodiment.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Describe with reference to the accompanying drawings according to the imageing sensor of the embodiment of the present invention and the terminal with it.
First, the imageing sensor of the embodiment of the present invention is described.Fig. 1 is the block diagram of imageing sensor according to an embodiment of the invention.
As shown in Figure 1, this imageing sensor 100 comprises pixel unit array 10, amplification converting unit 20 and filter array 30.
Pixel unit array 10 comprises multiple pixel cell 11; Amplification converting unit 20 is converted to analog signal for the photogenerated charge produced by pixel cell 11; Filter array 30 is arranged in pixel unit array 10, and each filter array 30 comprises multiple filter 31, and the filter 31 of same color corresponds to multiple pixel cell 11.
Wherein, multiple pixel cells corresponding to the filter 31 of same color, the photogenerated charge that in the pixel cell 11 of a part, each pixel cell produces independently uses an amplification converting unit 20 export and merge into the first analog signal A1, the cumulative rear shared amplification converting unit 20 of photogenerated charge that the pixel cell of remainder produces exports the second analog signal A2, the all pixel cells exporting the first analog signal A1 are positioned at the same row of pixel unit array 10, the all pixel cells exporting the second analog signal A2 are positioned at the same row of pixel unit array 10, first analog signal A1 is not identical with the second analog signal A2.
Imageing sensor 100 of the present invention, the corresponding multiple pixel cell 11 of filter 31 based on same color, and multiple pixel cells 11 of filter 31 correspondence of same color analog signal that output two is different after amplification converting unit 20 is changed, hardware foundation is provided for realizing HDR function, compared to the software simulating HDR function in correlation technique, this imageing sensor 100 realizes HDR function by hardware modifications, promotes HDR effect.
As shown in Figure 2, imageing sensor 100 also comprises AD conversion unit 40, and the first analog signal A1 and the second analog signal A2 is converted to the first digital signal D1 and the second digital signal D2, for image procossing provides data by AD conversion unit 40 respectively.
In some embodiments of the invention, the multiple pixel cells 11 corresponding to filter 31 of same color are positioned at the different lines of pixel unit array 10.
Such as, corresponding 2 row 2 of filter 31 of same color arrange and amount to 4 pixel cells, the photogenerated charge that 2 pixel cells 11 being arranged in first row produce independently uses an amplification converting unit 20 export and merge into the first analog signal A1, the second analog signal A2 is converted to through amplification converting unit 20 after the photogenerated charge that 2 pixel cells 11 being arranged in secondary series produce is cumulative, first analog signal A1 is converted to the first digital signal D1 by an AD conversion unit 40, second analog signal A2 is converted to the second digital signal D2 by another AD conversion unit 40.
With reference to shown in Fig. 3, for filter distribution schematic diagram according to an embodiment of the invention, filter array 30 adopts Bayerarray color mode, wherein, identical characters represents filter (such as Gr, the Gb of same color, R, B), the row number of the pixel cell that the filter plate of the numeral same color after character is corresponding, the filter of different colours only allows the light transmission of corresponding wavelength.
Fig. 4 is the equivalent circuit diagram of imageing sensor according to an embodiment of the invention, as shown in Figure 4, comprising: the first pixel cell PD1 and the first transmitting switch TG1, the second pixel cell PD2 and the second transmitting switch TG2, the 3rd pixel cell PD3 and the 3rd transmitting switch TG3, the 4th pixel cell PD4 and the 4th transmitting switch TG4, the first amplification converting unit SF1, the second amplification converting unit SF2, the 3rd amplification converting unit SF3, the first AD conversion unit 41 and the second AD conversion unit 42.Wherein, pixel cell, such as photodiode, receive filter 31 through light and generate electric charge, transmitting switch opens the electric charge output that then corresponding pixel cell 11 generates, and then to be coupled in amplification converting unit 20 and to be converted to voltage signal, be converted to digital signal by AD conversion unit 40 and export, for image procossing provides data basis.
Wherein, the respectively adjacent and filter 31 of corresponding same color of first pixel cell PD1, the second pixel cell PD2, the 3rd pixel cell PD3 and the 4th pixel cell PD4, such as shown in Fig. 4, the pixel cell 11 that namely four difference are adjacent receives the light of same color, briefly, namely four pixel cells 11 form a large pixel (pixel).And the first pixel cell PD1 and the 3rd pixel cell PD3 is arranged in the same row of pixel unit array 10, the second pixel cell PD2 and the 4th pixel cell PD4 is arranged in the same row of pixel unit array 10.
Particularly, first pixel cell PD1 is connected with the first end of the first amplification converting unit SF1 by the first transmitting switch TG1, second pixel cell PD2 is connected with the first end of the second amplification converting unit SF2 by the second transmitting switch TG2, 3rd pixel cell PD3 is connected with the first end of the 3rd amplification converting unit SF3 by the 3rd transmitting switch TG3, 4th pixel cell PD4 is connected with the first end of the second amplification converting unit SF2 by the 4th transmitting switch TG4, the control end of the first transmitting switch TG1, the control end of the second transmitting switch TG2, the control end of the 3rd transmitting switch TG3 is all connected with control module with the control end of the 4th transmitting switch TG4, control module controls the switch of four transmitting switches, when transmitting switch is opened, corresponding pixel cell 11 outgoing signal.
The input of the first AD conversion unit 41 is connected with second end of the first amplification converting unit SF1 and second end of the 3rd amplification converting unit SF3 respectively, 3rd end of the first amplification converting unit SF1 is connected with default power supply such as Vdd, 3rd end of the 3rd amplification converting unit SF3 is connected with default power supply, the input of the second AD conversion unit 42 is connected with second end of the second amplification converting unit SF2, 3rd end of the second amplification converting unit SF2 is connected with default power supply, the output of the second AD conversion unit 42 is connected with the output of the first AD conversion unit 41.
The multiple pixel cells 11 corresponding to filter 31 that the control module of imageing sensor 100 controls same color expose according to row simultaneously, and the output of image processing module to AD conversion unit 40 synthesizes to obtain high dynamic range images.
As an example, 2i+1 (i=0 in pixel unit array 10, 1, 2, 3, 4 ...) row each filter 31 correspondence a pixel cell (pixel cell such as corresponding to filter Gr1) and be close to the pixel cell (pixel cell such as corresponding to filter Gr3) of the capable each filter 31 of the capable 2i+2 of 2i+1, i.e. the first pixel cell PD1 and the 3rd pixel cell PD3, charge conversion is carried out respectively by a first amplification converting unit SF1 and the 3rd amplification converting unit SF3, be converted to digital signal by the first AD conversion unit 41 again to export, if now the first AD conversion unit 41 output valve is ADC1, in addition, a pixel cell (pixel cell such as corresponding to filter Gr4) of the pixel cell (pixel cell such as corresponding to filter Gr2) of each filter 31 correspondence that 2i+1 is capable and the capable each filter 31 of 2i+2 in pixel unit array 10, the i.e. charge integration of the second pixel cell PD2 and the 4th pixel cell PD4 generation, and then be voltage signal by the second amplification converting unit SF2 by the charge conversion after collecting, be converted to digital signal by the second AD conversion unit 42 again to export, if now the second AD conversion unit 42 output valve is ADC2.
Particularly, 4 adjacent pixel cells are arranged, based on above-mentioned structure for corresponding 2 row 2 of the filter 31 of same color, when carrying out HDR and controlling, the same color pixel that control module controls adjacent rows exposes simultaneously, such as, control that 2i+1 and 2i+2 is capable to expose simultaneously, wherein, i=0,1,2,3....., and control the time for exposure, avoid the output saturation of two pixel cells of shared second amplification converting unit SF2.In an embodiment of the present invention, amplification converting unit 20 can play to the electric charge that pixel cell 11 exports the effect gathering coupling, be understandable that, now the first amplification converting unit SF1, the magnitude of voltage of the quantity of electric charge that the second amplification converting unit SF2 and the 3rd amplification converting unit SF3 collects or conversion meets: SF2=2SF1=2SF3, wherein, the value that ADC1 exports is the average of SF1 and SF3, so the pixel cell of every four same colors exports a high ADC2 value and a low ADC1 value simultaneously, and then at the ISP (ImageSignalProcessor of imageing sensor, i.e. image processor) hold and synthesis process is carried out to high ADC2 value and low ADC1 value, thus acquisition HDR image, realize HDR function.
Be understandable that, the circuit that circuit diagram left and right interchange in Fig. 4 obtains is also included within the scope of the application, namely two pixel cells 11 of left side same column share an amplification converting unit 20, two pixel cells 11 of the right same column individually use an amplification converting unit 20, be also included within the scope of the application, just the difference of element numbers.
As shown in Figure 5, imageing sensor 100 also comprises the micro mirror array 50 be arranged on filter array 30, and each micro mirror 51 in micro mirror array 50 is corresponding with a pixel cell 11, comprises formation, size, position correspondence.Light can be gathered the photosensitive part of pixel cell 11 by micro mirror 51, promotes the light reception intensity of pixel cell 11, thus improves imaging image quality.
Based on the imageing sensor of above-mentioned aspect embodiment, the terminal that embodiment according to a further aspect of the invention proposes is described with reference to the accompanying drawings.
Fig. 6 is the block diagram of terminal according to an embodiment of the invention, and as shown in Figure 6, this terminal 1000 comprises the imageing sensor 100 of above-mentioned aspect.Particularly, terminal 1000 can comprise mobile phone.
In certain embodiments, as shown in Figure 7, terminal 1000 also comprises the central processing unit 200 and display unit 300 that are connected with imageing sensor 100, the high dynamic range images that central processing unit 200 exports for controlling display unit 300 image sensor 100.Like this, the image that terminal 1000 is taken can be shown in display unit 300 and check for user.Display unit 300 comprises light-emitting diode display etc.
In certain embodiments, as shown in Figure 8, terminal 1000 comprises the central processing unit 200 and external memory 400 that are connected with imageing sensor 100, the high dynamic range images that central processing unit 200 exports for controlling external memory 400 memory image transducer 100.
Like this, the image of generation can be stored, and checks, uses or shifts after convenient.External memory 400 comprises SM (SmartMedia) card and CF (CompactFlash) card etc.
This terminal 1000, by adopting described imageing sensor 100, the hardware configuration based on imageing sensor 100 can realize HDR function, promotes HDR image effect.
It should be noted that, in the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term "left", "right" are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. an imageing sensor, is characterized in that, comprising:
Pixel unit array, comprises multiple pixel cell;
Amplification converting unit, is converted to analog signal for the photogenerated charge produced by pixel cell; And
Be arranged at the filter array in described pixel unit array, filter array comprises multiple filter, and the described filter of same color corresponds to multiple pixel cell;
Wherein, multiple pixel cells corresponding to the filter of described same color, the photogenerated charge that in the pixel cell of a part, each pixel cell produces independently uses an amplification converting unit export and merge into the first analog signal, the cumulative rear shared amplification converting unit of photogenerated charge that the pixel cell of remainder produces exports the second analog signal, the all pixel cells exporting described first analog signal are positioned at the same row of described pixel unit array, the all pixel cells exporting described second analog signal are positioned at the same row of described pixel unit array, described first analog signal is not identical with described second analog signal.
2. imageing sensor as claimed in claim 1, is characterized in that, also comprise:
AD conversion unit, for being converted to the first digital signal and the second digital signal respectively by described first analog signal and described second analog signal.
3. imageing sensor as claimed in claim 2, it is characterized in that, the multiple pixel cells corresponding to the filter of described same color are positioned at the different lines of pixel unit array.
4. imageing sensor as claimed in claim 3, it is characterized in that, corresponding 2 row 2 of filter of described same color arrange and amount to 4 pixel cells, the photogenerated charge that 2 pixel cells being arranged in first row produce independently uses an amplification converting unit to export and merges into described first analog signal, the second analog signal is converted to through amplification converting unit after the photogenerated charge that 2 pixel cells being arranged in secondary series produce is cumulative, described first analog signal is converted to described first digital signal by an AD conversion unit, described second analog signal is converted to described second digital signal by another AD conversion unit.
5. imageing sensor as claimed in claim 1, is characterized in that, also comprise:
Be arranged on the micro mirror array on described filter array, each micro mirror in described micro mirror array is corresponding with a described pixel cell.
6. imageing sensor as claimed in claim 2, is characterized in that, also comprise:
Control module and image processing module, described control module for control described same color filter corresponding to multiple pixel cells expose according to row simultaneously, the output of described image processing module to described AD conversion unit synthesizes to obtain high dynamic range images.
7. a terminal, is characterized in that, comprises the imageing sensor as described in any one of claim 1-6.
8. terminal as claimed in claim 7, it is characterized in that, described terminal comprises mobile phone.
9. terminal as claimed in claim 7, it is characterized in that, described terminal also comprises the central processing unit and display unit that are connected with described imageing sensor, and described central processing unit shows the high dynamic range images of described imageing sensor output for controlling described display unit.
10. terminal as claimed in claim 7, it is characterized in that, described terminal comprises the central processing unit and external memory that are connected with described imageing sensor, and described central processing unit stores the high dynamic range images of described imageing sensor output for controlling described external memory.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510963293.8A CN105578074B (en) | 2015-12-18 | 2015-12-18 | Imaging sensor and there is its terminal |
| PCT/CN2016/100881 WO2017101559A1 (en) | 2015-12-18 | 2016-09-29 | Image sensor, terminal comprising same, and imaging method |
| EP16874921.6A EP3313069B1 (en) | 2015-12-18 | 2016-12-16 | Image sensor, control method, and electronic device |
| JP2018512601A JP6461429B2 (en) | 2015-12-18 | 2016-12-16 | Image sensor, control method, and electronic apparatus |
| SG11201800816VA SG11201800816VA (en) | 2015-12-18 | 2016-12-16 | Image sensor, control method, and electronic device |
| PCT/CN2016/110445 WO2017101864A1 (en) | 2015-12-18 | 2016-12-16 | Image sensor, control method, and electronic device |
| KR1020187006361A KR102046635B1 (en) | 2015-12-18 | 2016-12-16 | Image Sensors, Control Methods, and Electronic Devices |
| TW105141958A TWI615029B (en) | 2015-12-18 | 2016-12-16 | Image sensor, terminal having same and imaging method using same |
| US15/568,941 US10313612B2 (en) | 2015-12-18 | 2016-12-16 | Image sensor, control method, and electronic device |
| IL257177A IL257177B (en) | 2015-12-18 | 2018-01-28 | Image sensor, control method, and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510963293.8A CN105578074B (en) | 2015-12-18 | 2015-12-18 | Imaging sensor and there is its terminal |
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| CN105578074A true CN105578074A (en) | 2016-05-11 |
| CN105578074B CN105578074B (en) | 2017-11-10 |
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| CN (1) | CN105578074B (en) |
| TW (1) | TWI615029B (en) |
| WO (1) | WO2017101559A1 (en) |
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| CN113132692A (en) * | 2019-12-30 | 2021-07-16 | Oppo广东移动通信有限公司 | Image sensor, imaging device, electronic apparatus, image processing system, and signal processing method |
| CN113141444A (en) * | 2020-01-19 | 2021-07-20 | Oppo广东移动通信有限公司 | Image sensor, imaging device, electronic apparatus, image processing system, and signal processing method |
| WO2021143670A1 (en) * | 2020-01-19 | 2021-07-22 | Oppo广东移动通信有限公司 | Image sensor, imaging apparatus, electronic device, image processing system, and signal processing method |
| CN113141444B (en) * | 2020-01-19 | 2023-08-08 | Oppo广东移动通信有限公司 | Image sensor, imaging device, electronic apparatus, image processing system, and signal processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI615029B (en) | 2018-02-11 |
| WO2017101559A1 (en) | 2017-06-22 |
| CN105578074B (en) | 2017-11-10 |
| TW201724844A (en) | 2017-07-01 |
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