CN105809153A - Chip circuit and fingerprint collection system - Google Patents
Chip circuit and fingerprint collection system Download PDFInfo
- Publication number
- CN105809153A CN105809153A CN201610238534.7A CN201610238534A CN105809153A CN 105809153 A CN105809153 A CN 105809153A CN 201610238534 A CN201610238534 A CN 201610238534A CN 105809153 A CN105809153 A CN 105809153A
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- circuit
- chip
- amplifying circuit
- pixel cell
- chip circuit
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Image Input (AREA)
- Collating Specific Patterns (AREA)
Abstract
The invention discloses a chip circuit and a fingerprint collection system.The chip circuit comprises pixel units with first areas and amplifying circuits connected with the pixel units, and one amplifying circuit is connected with multiple pixel units; each amplifying circuit receives collection signals detected by the corresponding pixel units and sends the collection signals to a processing center through a demodulation circuit and a filter circuit, and the processing center processes the collection signals and sends the processed collection signals to a mainframe.According to the chip circuit and the fingerprint collection system, multiple pixel units are connected to the same amplifying circuit, the area of the chip circuit can be decreased, and the chip cost can be reduced.
Description
Technical field
The present invention relates to electronic information field, particularly relate to chip circuit and fingerprint acquisition system.
Background technology
Existing fingerprint recognition chip, particularly condenser type Cleaning Principle, generally can be decided to be 508dpi the standard of resolution, and each pixel corresponding to 508dpi be sized to 50uM*50uM, this design standard meets initial image definition, is also the commonly used resolution of current most of producer.
The production technique of current prosthetic finger improves constantly, and the making that the problem brought is exactly prosthetic finger is easy than before, thus having influence on payment identification and the authentication etc. of user, so the resolution of fingerprint recognition chip must be improved.Owing to each fingerprint recognition chip ensures there is a number of pixel in certain area domestic demand, if chip area is too big, the volume of fingerprint acquisition device can be affected, cause the problem such as fingerprint acquisition device high cost or finger identification difficulty.If chip area is too little, can cause that chip internal algorithm realizes difficulty, so that chip cost remains high, hinder the quickly universal of a large amount of fingerprint recognition chip.
Summary of the invention
Present invention is primarily targeted at a kind of chip circuit of offer and fingerprint acquisition system, it is intended to improve the resolution of fingerprint recognition chip.
For achieving the above object, the present invention provides a kind of chip circuit, including the pixel cell with the first area, and the amplifying circuit being connected with described pixel cell, a described amplifying circuit is connected to multiple described pixel cell；Described amplifying circuit receives the collection signal that described pixel cell detects, and is sent to processing center by demodulator circuit and filter circuit by this collection signal, and processing center sends to main frame after this collection signal processing.
Preferably, the area of described pixel cell is 40uM*40uM ~ 48uM*48uM.
Preferably, the area of described pixel cell is 45uM*45uM.
Preferably, a described amplifying circuit is connected to two to six pixel cells.
Preferably, a described amplifying circuit is connected to four pixel cells.
Preferably, four pixel cells being connected to same amplifying circuit form string between two, and are arranged parallel to each other.
Preferably, being connected to four pixel cells of same amplifying circuit mutually staggered is three row, and the central point line of the pixel cells of adjacent two row surrounds a diamond structure.
Preferably, described amplifying circuit is connected successively one by one with described demodulator circuit and described filter circuit, and organize amplifying circuit, demodulator circuit and filter circuit more and by an analog-digital converter, collection signal is changed, then the data message after conversion is sent to processing center.
Present invention also offers a kind of fingerprint acquisition system, including chip circuit as above.
Compared with prior art, the invention has the beneficial effects as follows: the present invention includes the pixel cell with the first area and the amplifying circuit being connected with described pixel cell, and a described amplifying circuit is connected to multiple described pixel cell；Described amplifying circuit receives the collection signal that described pixel cell detects, and this collection signal is sent to processing center by demodulator circuit and filter circuit, processing center sends after this collection signal processing to main frame, reduces the area of chip circuit, adds the resolution of chip.
Accompanying drawing explanation
Fig. 1 is the principle schematic of chip circuit one embodiment of the present invention；
Fig. 2 is the principle schematic of another embodiment of chip circuit of the present invention；
Fig. 3 is the arrangement mode of pixel cell in chip circuit first embodiment of the present invention；
Fig. 4 is the arrangement mode of pixel cell in chip circuit the second embodiment of the present invention；
Fig. 5 is the arrangement mode of pixel cell in chip circuit the 3rd embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with accompanying drawing, the present invention is further described.
As it is shown in figure 1, in embodiments of the present invention, this chip circuit includes the pixel cell 1 with the first area and the amplifying circuit 2 being connected with described pixel cell 1, and a described amplifying circuit 2 is connected to multiple described pixel cell 1；Described amplifying circuit 2 receives the collection signal that described pixel cell 1 detects, and is sent to processing center 5 by demodulator circuit 3 and filter circuit 4 by this collection signal, and processing center 5 sends after this collection signal processing to main frame 6.
As shown in Figure 2, in another embodiment, amplifying circuit 2 is connected successively one by one with described demodulator circuit 3 and described filter circuit 4, and collections signal changed by many group amplifying circuits 2, demodulator circuit 3 and filter circuit 4 by an analog-digital converter 7, then by the data message transmission after changing to processing center 5.Many group amplifying circuits etc. share one group of analog-digital converter, can reduce the component number of chip circuit, also reduce chip area simultaneously, save cost.
In the present embodiment, chip circuit is fingerprint recognition chip circuit.A number of pixel cell 1 consists of condenser type collecting unit, in order to gather finger print information, constitutes Fingerprint Identification Unit with the remaining circuit in fingerprint recognition chip.The chip circuit of the present invention, by being connected with an amplifying circuit 2 by multiple pixel cells 1, can reduce the quantity of amplifying circuit 2 in chip circuit, can reduce the area of chip circuit, also reduces chip cost simultaneously.
Specifically, the area of the pixel cell 1 of the first area is 40uM*40uM ~ 48uM*48uM.The area of the condenser type collecting unit of multiple pixel cells 1 composition is suitable with finger size, that compares with prior art each pixel is sized to 50uM*50uM, owing to pixel cell 1 unit are is less, the present invention is in the collecting unit of same area, pixel number can be greatly increased so that the resolution of fingerprint recognition chip increases.
In a particular embodiment, the area of described pixel cell 1 is 45uM*45uM.
As shown in Figures 3 to 5, an amplifying circuit 2 is connected to two to six pixel cells 1.By being connected with an amplifying circuit 2 by multiple pixel cells 1, the quantity of amplifying circuit 2 in chip circuit can be reduced, the area of chip circuit can be reduced, also reduce chip cost simultaneously.
Specifically, as it is shown in figure 1, a described amplifying circuit 2 is connected to four pixel cells 1.These four pixel cells form one group of pixel cell, and namely many arrays pixel cell forms the collecting unit of fingerprint capturer.
As it is shown on figure 3, in the first embodiment, four pixel cells 1 being connected to same amplifying circuit 2 form string between two, and are arranged parallel to each other.Amplifying circuit 2 may connect to the square lower section that these four pixel cell central point connecting lines surround, and the connecting line etc. of amplifying circuit can be made to greatly reduce.
As shown in Figure 4, in a second embodiment, being connected to four pixel cells 1 of same amplifying circuit 2 mutually staggered is three row, and the central point line of the pixel cells 1 of adjacent two row surrounds a diamond structure, amplifying circuit is arranged in this diamond structure surrounded, to facilitate it to connect up.
In other embodiments, four pixel cells 1 being connected to same amplifying circuit 2 also have other arrangement modes, however it is not limited to the mode cited by the embodiment of the present invention.
As it is shown in figure 5, in the third embodiment, a described amplifying circuit 2 is connected to three pixel cells 1.These three pixel cells form one group of pixel cell, and namely many arrays pixel cell forms the collecting unit of fingerprint capturer.These three pixel cells are drawn close mutually, and the connecting line of central point surrounds a triangle, and amplifying circuit is arranged in this triangle surrounded, to facilitate chip circuit to connect up.
Present invention also offers a kind of fingerprint acquisition system, including chip circuit as above.This fingerprint acquisition system concrete structure principle is with reference to above-described embodiment, owing to this fingerprint acquisition system have employed whole technical schemes of above-mentioned all embodiments, therefore having all beneficial effects that the technical scheme of above-described embodiment is brought equally, this is no longer going to repeat them.
Should be understood that; these are only the preferred embodiments of the present invention; can not therefore limit the scope of the claims of the present invention; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (9)
1. a chip circuit, it is characterised in that: including the pixel cell with the first area and the amplifying circuit being connected with described pixel cell, a described amplifying circuit is connected to multiple described pixel cell；Described amplifying circuit receives the collection signal that described pixel cell detects, and is sent to processing center by demodulator circuit and filter circuit by this collection signal, and processing center sends to main frame after this collection signal processing.
2. chip circuit according to claim 1, it is characterised in that: the area of described pixel cell is 40uM*40uM ~ 48uM*48uM.
3. chip circuit according to claim 2, it is characterised in that: the area of described pixel cell is 45uM*45uM.
4. chip circuit according to claim 1, it is characterised in that: a described amplifying circuit is connected to two to six pixel cells.
5. chip circuit according to claim 4, it is characterised in that: a described amplifying circuit is connected to four pixel cells.
6. chip circuit according to claim 5, it is characterised in that: four pixel cells being connected to same amplifying circuit form string between two, and are arranged parallel to each other.
7. chip circuit according to claim 5, it is characterised in that: being connected to four pixel cells of same amplifying circuit mutually staggered is three row, and the central point line of the pixel cells of adjacent two row surrounds a diamond structure.
8. chip circuit as claimed in any of claims 1 to 7, it is characterized in that: described amplifying circuit is connected successively one by one with described demodulator circuit and described filter circuit, and organize amplifying circuit, demodulator circuit and filter circuit more and by an analog-digital converter, collection signal is changed, then the data message after conversion is sent to processing center.
9. a fingerprint acquisition system, it is characterised in that: include the chip circuit as described in claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610238534.7A CN105809153A (en) | 2016-04-18 | 2016-04-18 | Chip circuit and fingerprint collection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610238534.7A CN105809153A (en) | 2016-04-18 | 2016-04-18 | Chip circuit and fingerprint collection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105809153A true CN105809153A (en) | 2016-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610238534.7A Pending CN105809153A (en) | 2016-04-18 | 2016-04-18 | Chip circuit and fingerprint collection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108564015A (en) * | 2018-03-30 | 2018-09-21 | 维沃移动通信有限公司 | A kind of fingerprint identification method and mobile terminal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564189A (en) * | 2004-04-22 | 2005-01-12 | 叶军 | Semiconductor acquisition element for fingerprint |
| CN101194363A (en) * | 2005-06-02 | 2008-06-04 | 伊斯曼柯达公司 | CMOS active pixel sensor shared amplifier pixel |
| CN101282484A (en) * | 2007-04-03 | 2008-10-08 | 佳能株式会社 | Image sensing apparatus and image capturing system |
| CN103548035A (en) * | 2010-10-08 | 2014-01-29 | 苹果公司 | Finger sensing device including differential measurement circuitry and related methods |
| CN105281769A (en) * | 2015-10-21 | 2016-01-27 | 深圳市汇顶科技股份有限公司 | Signal conversion circuit and fingerprint identification system |
-
2016
- 2016-04-18 CN CN201610238534.7A patent/CN105809153A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564189A (en) * | 2004-04-22 | 2005-01-12 | 叶军 | Semiconductor acquisition element for fingerprint |
| CN101194363A (en) * | 2005-06-02 | 2008-06-04 | 伊斯曼柯达公司 | CMOS active pixel sensor shared amplifier pixel |
| CN101282484A (en) * | 2007-04-03 | 2008-10-08 | 佳能株式会社 | Image sensing apparatus and image capturing system |
| CN103548035A (en) * | 2010-10-08 | 2014-01-29 | 苹果公司 | Finger sensing device including differential measurement circuitry and related methods |
| CN105281769A (en) * | 2015-10-21 | 2016-01-27 | 深圳市汇顶科技股份有限公司 | Signal conversion circuit and fingerprint identification system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108564015A (en) * | 2018-03-30 | 2018-09-21 | 维沃移动通信有限公司 | A kind of fingerprint identification method and mobile terminal |
| CN108564015B (en) * | 2018-03-30 | 2020-06-19 | 维沃移动通信有限公司 | Fingerprint identification method and mobile terminal |
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Application publication date: 20160727 |