CN105893987A - Sensor array and chip - Google Patents
Sensor array and chip Download PDFInfo
- Publication number
- CN105893987A CN105893987A CN201610332128.7A CN201610332128A CN105893987A CN 105893987 A CN105893987 A CN 105893987A CN 201610332128 A CN201610332128 A CN 201610332128A CN 105893987 A CN105893987 A CN 105893987A
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- Prior art keywords
- sensor array
- electric field
- chip
- pixel cell
- equilateral hexagon
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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
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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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)
Abstract
The invention discloses a sensor array and a chip. The sensor array comprises a plurality of pixel units; the plurality of pixel units are spliced to form a sensor array of which the size is matched with the size of a finger; and the plurality of pixel units comprise regular hexagon-shaped pixel units. According to the sensor array and the chip of the invention, the shape of the plurality of pixel units of the sensor array is set to a regular hexagon, so that the edge effect of the pixel units in an electric field can be decreased, and the definition of a fingerprint image can be increased.
Description
Technical field
The present invention relates to sensor technical field, particularly relate to sensor array and chip.
Background technology
In order to distinguish fingerprint, current Fingerprint Identification Unit can be largely classified into optical fingerprint identifier and capacitance type fingerprint identifier.And wherein, capacitance type fingerprint identifier is to utilize semiconductor core chip sensor to sense fingerprint, its principle is to be integrated in by sensor array in a chip, when user carries out identification of fingerprint, when finger is pressed against this chip surface, sensor array forms an electrode of electric field, and finger forms another electrode of electric field, to complete the acquisition of fingerprint lines image.And each pixel of fingerprint Identification sensor is a single sensing unit, utilizes each part of identification fingerprint respectively of each pixel in sensor array, the collection of finger print can be completed.
But, owing to receiving the impact of the edge effect of electric field in the electric field, each pixel cell all can form the electric field line of divergent shape in its marginal portion, and can be more serious when sensor array marginal portion, thus it is unintelligible to affect the fingerprint image that sensor recognizes, and causes being not easy the problems such as identification.
Summary of the invention
Present invention is primarily targeted at a kind of sensor array of offer and chip, it is intended to improve the definition of fingerprint recognition image.
For achieving the above object, the present invention provides a kind of sensor array, and including multiple pixel cells, the plurality of pixel cell mutually splices to form the sensor array suitable with finger size；The plurality of pixel cell includes the pixel cell being shaped as equilateral hexagon.
Preferably, when the angle between the both sides of the pixel cell of described equilateral hexagon is acute angle, between described angle, connect a minor face, so that angle is obtuse angle.
The present invention also provides for a kind of chip, and described chip includes sensor array as above, and the peripheral circuit electrically connected with sensor array, and described peripheral circuit receives the information of described sensor array collection and processes.
Preferably, described sensor array periphery also encloses and is provided with auxiliary electric field.
Preferably, described auxiliary electric field connects the power supply having the first voltage, and described first voltage is equal with the voltage of electric field formed between described finger and chip.
Preferably, the described sensor array that described pixel cell is spliced to form is classified as the sensor array of quadrangle.
Preferably, the sensor array of described quadrangle is all around provided with four interval, limit settings of the quadrangle auxiliary electric field similar to its shape, four limits of described quadrangle auxiliary electric field and the sensor array of described quadrangle.
Preferably, the described sensor array that described pixel cell is spliced to form is classified as the sensor array of equilateral hexagon.
Preferably, the sensor array week skirt of described equilateral hexagon is provided with equilateral hexagon auxiliary electric field, and the interval, each limit of each limit of described equilateral hexagon auxiliary electric field and the sensor array of described equilateral hexagon is arranged.
Preferably, the sensor array week skirt of described equilateral hexagon is provided with quadrangle auxiliary electric field.
Compared with prior art, the invention has the beneficial effects as follows: owing to multiple pixel cells of sensor of the invention array are shaped to equilateral hexagon so that pixel cell edge effect in the electric field reduces, thus adds the definition of fingerprint image.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to the structure shown in these accompanying drawings.
Fig. 1 is the principle schematic of inventive sensor array embodiment；
Fig. 2 is the principle schematic of inventive sensor another embodiment of array；
Fig. 3 is the principle schematic of pixel cell in inventive sensor array；
Fig. 4 is the principle schematic of chip of the present invention；
Fig. 5 is the first embodiment principle schematic of chip of the present invention；
Fig. 6 be chip of the present invention first embodiment in another principle schematic；
Fig. 7 is the second embodiment principle schematic of chip of the present invention；
Fig. 8 is the 3rd embodiment principle schematic of chip 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 referring to the drawings.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Need explanation, directional instruction in the embodiment of the present invention (such as up, down, left, right, before and after ...) is only used for explanation relative position relation under a certain particular pose (as shown in drawings) between each parts, motion conditions etc., if this particular pose changes, then directionality instruction changes the most therewith.
The embodiment of the present invention proposes a kind of sensor array.
As it is shown in figure 1, in embodiments of the present invention, sensor array 3 includes multiple pixel cell 1, and the 1 yuan of mutual splicing of the plurality of pixel list is to form the sensor array 3 suitable with finger size；The plurality of pixel cell 1 includes the pixel cell being shaped as equilateral hexagon.
In the present embodiment, this sensor array is applied in fingerprint Identification sensor.When user carries out identification of fingerprint, as in figure 2 it is shown, sensor array 3 forms an electrode of electric field, finger 4 forms another electrode of electric field, forms an electric field between finger 4 and sensor array 3, to complete the acquisition of fingerprint lines image.And each pixel cell of fingerprint Identification sensor is a single sensing unit, utilizes each part of identification fingerprint respectively of each pixel in sensor array 3, the collection of finger print can be completed.Owing to hexagonal shape is closest to circular, so in the electric field, the shape of equilateral hexagon by edge effect affected less and easily realized in technique, each pixel cell electric field line in its marginal portion is made to dissipate less, so that the fingerprint image that sensor recognizes becomes apparent from, it is simple to identify.And equilateral hexagon can be regular hexagon, relatively long side or recessed hexagon.
In another embodiment, as shown in Figure 2 and Figure 3, when the angle between the both sides of the pixel cell 1 of described equilateral hexagon is acute angle, a minor face 11 between described angle, is connected, so that angle is obtuse angle.When the angle i.e. formed when any two limits of equilateral hexagon is acute angle, this angle being carried out corner cut, to form two obtuse angles, increase by a minor face 11 being connected between two limits, similar in shape to hexagon, but angle is obtuse angle.
Specifically, the angle between the both sides of the pixel cell of described equilateral hexagon is 120 ° ~ 140 °.In a preferred embodiment, this angle is 135 °, it is simple to the techniques such as the die sinking of sensor array, production.
In another embodiment, in a sensor array, the plurality of pixel cell 1 is the pixel cell of equilateral hexagon.Whole sensor array 3 is spliced by the pixel cell of equilateral hexagon so that the edge effect that whole equilateral hexagon is subject to is less, increases image recognition degree.
Shown in Fig. 1 to Fig. 5 by multiple pixel cells 1 be spliced to form for operative sensor array, the most only make to illustrate, in a particular embodiment, the number of pixel cell 1 can be determined by die size, pixel cell area.
As shown in Figures 2 to 5, the present invention also provides for a kind of chip, described chip includes sensor array 3 as above, and the peripheral circuit (not shown) electrically connected with sensor array 3, and described peripheral circuit receives the information of described sensor array 3 collection and processes.Specifically, peripheral circuit includes the universal circuit in the fingerprint Identification sensors such as amplifier, wave filter, data processor, this peripheral circuit and sensor array 3 encapsulation process, to meet the needs of fingerprint Identification sensor.
In the present embodiment, sensor array 3 forms an electrode of electric field, and finger 4 forms another electrode of electric field, forms an electric field between finger 4 and sensor array 3, to complete the acquisition of fingerprint lines image.And each pixel cell of fingerprint Identification sensor is a single sensing unit, utilizes each part of identification fingerprint respectively of each pixel in sensor array 3, the collection of finger print can be completed.Due in the electric field, the shape of equilateral hexagon by edge effect affected less so that each pixel cell electric field line in its marginal portion dissipates less, so that the fingerprint image that sensor recognizes becomes apparent from, it is simple to identify.
As shown in Figures 2 to 6, sensor array 3 periphery also encloses and is provided with auxiliary electric field 2.Auxiliary electric field 2 is the conductor enclosing and being located at sensor array 3 periphery, can be wire or bulk, can be realized by technological means such as encapsulation, domains, provide an extra electric field for sensor array 3, to improve the edge effect of sensor array 3 electric field.
In a particular embodiment, auxiliary electric field 2 connects the power supply having the first voltage, and described first voltage is equal with the voltage of electric field formed between finger and chip.As shown in Figure 2, when forming electric field between finger 4 and sensor array 3, connect the power supply of auxiliary electric field 2, so that the electric field line between the electric field line of auxiliary electric field 2 and finger 4 and sensor array 3 is mutually gathered, the electric field line between finger 4 and sensor array 3 can be avoided excessively to disperse, to reach to reduce the effect of edge effect, to improve the resolution of image.
In the first embodiment, as it is shown on figure 3, the sensor array that described sensor array 3 is quadrangle that is spliced to form of described pixel cell 1.The sensor array of quadrangle can be easy to periphery circuit design, chip package, and in sensor array 3 marginal portion, can the shape of pixel cell 1 be appropriately adjusted, to meet chip design needs.
As it is shown on figure 3, four intervals, limit that the sensor array 3 of described quadrangle is all around provided with the quadrangle auxiliary electric field 2 similar to its shape, four limits of described quadrangle auxiliary electric field 2 and the sensor array 3 of described quadrangle are arranged.In a particular embodiment, the distance between auxiliary electric field 2 with sensor array 3 is relevant with the shape of sensor array 3, size, the distance of distance finger and medium, can be designed according to the actual requirements.
As shown in Figure 4, auxiliary electric field 2 is arranged near sensor array 3, and auxiliary electric field 2 is connected with edge's irregular metal sheet of sensor array 3, forms an erose conductor, to realize improving the effect of the edge effect of sensor array 3 electric field, also increase the usable area of chip simultaneously.In the present embodiment, auxiliary electric field 2 is block conductor.
In a second embodiment, the sensor array that described sensor array 3 is equilateral hexagon that described pixel cell 1 is spliced to form.The sensor array structure of equilateral hexagon is compact, and edge effect impact is little.
As it is shown in figure 5,3 weeks skirt of sensor array of described equilateral hexagon are provided with equilateral hexagon auxiliary electric field 2, the interval, each limit of each limit of described equilateral hexagon auxiliary electric field 2 and the sensor array 3 of described equilateral hexagon is arranged.When carrying out chip package, after the sensor array of equilateral hexagon auxiliary electric field and equilateral hexagon is installed on circuit boards, peripheral circuit may be disposed on circuit board outside equilateral hexagonal each limit, to reduce chip area.
In the third embodiment, the sensor array 3 that described sensor array 3 is equilateral hexagon that described pixel cell 1 is spliced to form.Sensor array 3 compact conformation of equilateral hexagon, and edge effect impact is little.
As shown in Figure 6,3 weeks skirt of the sensor array of described equilateral hexagon are provided with quadrangle auxiliary electric field 2, and the interval, each limit of each limit of described quadrangle auxiliary electric field 2 and the sensor array 3 of described equilateral hexagon is arranged.The auxiliary electric field 2 of quadrangle can facilitate the encapsulation of chip to design.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every under the inventive concept of the present invention; utilize the equivalent structure transformation that description of the invention and accompanying drawing content are made, or directly/be indirectly used in other relevant technical fields and be included in the scope of patent protection of the present invention.
Claims (10)
1. a sensor array, it is characterised in that: include that multiple pixel cell, the plurality of pixel cell mutually splice to form the sensor array suitable with finger size；The plurality of pixel cell includes the pixel cell being shaped as equilateral hexagon.
2. sensor array as claimed in claim 1, it is characterised in that: when the angle between the both sides of the pixel cell of described equilateral hexagon is acute angle, between described angle, connect a minor face, so that angle is obtuse angle.
3. a chip, it is characterised in that described chip includes the sensor array as described in claim 1 to 2, and the peripheral circuit electrically connected with sensor array, described peripheral circuit receives the information of described sensor array collection and processes.
4. chip as claimed in claim 3, it is characterised in that described sensor array periphery also encloses and is provided with auxiliary electric field.
5. chip as claimed in claim 4, it is characterised in that described auxiliary electric field connects the power supply having the first voltage, described first voltage is equal with the voltage of electric field formed between described finger and chip.
6. chip as claimed in claim 5, it is characterised in that the described sensor array that described pixel cell is spliced to form is classified as the sensor array of quadrangle.
7. chip as claimed in claim 6, it is characterised in that the sensor array of described quadrangle is all around provided with four intervals, limit of the quadrangle auxiliary electric field similar to its shape, four limits of described quadrangle auxiliary electric field and the sensor array of described quadrangle and arranges.
8. chip as claimed in claim 5, it is characterised in that the described sensor array that described pixel cell is spliced to form is classified as the sensor array of equilateral hexagon.
9. chip as claimed in claim 8, it is characterized in that, the sensor array week skirt of described equilateral hexagon is provided with equilateral hexagon auxiliary electric field, and the interval, each limit of each limit of described equilateral hexagon auxiliary electric field and the sensor array of described equilateral hexagon is arranged.
10. chip as claimed in claim 8, it is characterised in that the sensor array week skirt of described equilateral hexagon is provided with quadrangle auxiliary electric field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610332128.7A CN105893987A (en) | 2016-05-19 | 2016-05-19 | Sensor array and chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610332128.7A CN105893987A (en) | 2016-05-19 | 2016-05-19 | Sensor array and chip |
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| Publication Number | Publication Date |
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| CN105893987A true CN105893987A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610332128.7A Pending CN105893987A (en) | 2016-05-19 | 2016-05-19 | Sensor array and chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106557748A (en) * | 2016-11-21 | 2017-04-05 | 成都艾德沃传感技术有限公司 | Fingerprint recognition processing method and processing device |
-
2016
- 2016-05-19 CN CN201610332128.7A patent/CN105893987A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106557748A (en) * | 2016-11-21 | 2017-04-05 | 成都艾德沃传感技术有限公司 | Fingerprint recognition processing method and processing device |
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Application publication date: 20160824 |
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