CN104850830A - Fingerprint recognition device for ITO glass - Google Patents
Fingerprint recognition device for ITO glass Download PDFInfo
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- CN104850830A CN104850830A CN201510225723.6A CN201510225723A CN104850830A CN 104850830 A CN104850830 A CN 104850830A CN 201510225723 A CN201510225723 A CN 201510225723A CN 104850830 A CN104850830 A CN 104850830A
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- ito glass
- fingerprint
- fingerprint identification
- fingerprint recognition
- sensor
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Abstract
The invention provides a fingerprint recognition device for ITO glass, which comprises an analog front-end circuit, a detection and recognition chip (20) of a data transmission and storage digital circuit, and a capacitive fingerprint recognition sensor (40) manufactured on the ITO glass (30). The capacitive fingerprint recognition sensor (40) is connected with the detection and recognition chip (20). Due to the adoption of the above technical scheme, the area of a silicon chip is effectively reduced. Meanwhile, the number of intermediate conversion links in a line is reduced and the production cost is lowered. The production efficiency is improved.
Description
Technical field
The present invention relates to fingerprint identification technology, particularly adopt ito glass part to replace the fingerprint identification device of silicon chip.
Background technology
Current fingerprint identification technology is several technology of following introduction substantially:
optical technology:gathering fingerprint by optical technology is history technology the most remote, most popular.Finger is placed on optical mirror slip, point under built-in light source irradiates, be incident upon on charge-coupled device (CCD) with prism, so formed crestal line (there is in fingerprint image the streakline of one fixed width and trend) in black, valley line (sunk part between streakline) in white digitized, can by many gray scales finger print image of fingerprint equipment algorithm process.The fingerprint collecting equipment of optics has obvious advantage: it tests through the application of long period, to a certain extent the variation of adaptive temperature, comparatively cheap, can reach the high-resolution etc. of 500DPI.Shortcoming is: owing to requiring sufficiently long light path, therefore require enough large size, and overdrying and too greasy finger also will make the effect of optical finger print product degenerate.
silicon technology:english: CMOS, in the later stage nineties 20th century, the technology of based semiconductor silicon capacity effect is tending towards ripe.Silicon sensor becomes a pole plate of electric capacity, and finger is then another pole plate, utilizes the ridge and paddy of pointing streakline relative to the capacitance difference between level and smooth silicon sensor, forms the gray level image of 8bit.Silicon technology advantage can obtain picture quality more better than optical technology on less surface, the resolution (less surface also causes the decline of cost and can be integrated in less equipment) of acquisition 200 ~ 300 times on the surface of 1cm × 1.5cm.Shortcoming is easily disturbed, reliability relative mistake.
ultrasonic technology:for overcoming the deficiency of optical technology equipment and silicon technology equipment, a kind of novel ultrasonic fingerprint collecting device occurs.Its principle is the ability utilizing ultrasound wave to have penetrable material, and produce the echo that varies in size (when ultrasound wave arrives unlike material surface with the difference of material, the degree being absorbed, penetrate and reflect is different), therefore, utilize skin and air for the difference of sound impedance, just can distinguish the position at fingerprint ridge and paddy place.The ultrasonic frequency that ultrasonic technology uses is 1 × 104Hz ~ 1 × 109Hz, and energy is controlled in the degree (with the intensity of medical diagnosis identical) harmless to human body.Ultrasonic technology product can reach best precision, and it requires lower to the clean-up performance in the peaceful face of finger, but its acquisition time can be longer than aforementioned two series products significantly.
optical fingerprint collector:be that fingerprint capturer the earliest also uses the most general, optical fingerprint collector is long for service time, and its gathers fingerprint table layer texture image.The surface of finger contact prism, light emitting diode provides a light source, and image is by charge coupling device integrated circuit acquisition.Optical fingerprint sensor is reliable, and price is also very cheap, but has the Fingerprint recognition rate of coverture very low to dirty finger and dry finger surface, poor to the adaptive faculty of the environmental factors such as temperature.But owing to limiting by light path, undistorted type collector size is larger.Usually more serious optical distortion is had; Acquisition window surface often has vestige to leave over phenomenon.CCD device may be aging because of the life-span, has and reduce the defect such as picture quality, false fingerprint.
heat-sensitive type sensor:the basis fingerprint ridge that fingerprint surface image is formed and ditch change along with the thermal change of distributing.At a typical heat sensitive sensor, a small-sized heating element is directly attached to a set of heat sensing element.Because " reading " fingerprint is the first element, ridge and ditch are heated.It is different from the temperature of Prof. Du Yucang fingerprint combination picture with ditch that heat sensing element senses goes out ridge.Although low price, volume is little, often consumes more energy relative to other competitive technologyL heat-sensitive type sensor, and in the weather of extremely hot environment or sweltering heat, image acquisition is very unintelligible.
biological RF fingerprint recognition technology:radio frequency sensor technology launches micro-radiofrequency signal by sensor itself, and the epidermal area penetrating finger removes the lines of detection nexine, obtains best fingerprint image.The difficulty fingers such as therefore to dry finger, hands wet with perspiration refers to, dry finger are by can up to 99.5%, false proof fingerprint ability is strong, the dermal of a recognition principle hand to people of fingerprint sensor responds, and has fundamentally stopped the problem of artificial fingerprint, wide warm area: be applicable to area cold or extremely hot especially especially.Because radio frequency sensor produces high-quality image, therefore radio-frequency technique is the most reliable, has solution the most effectively.And above-mentioned technology exists some different defects all separately, such as:
Optical technology: physical dimension is large, and recognition time is long, overdrying or too greasy finger identification difficulty.
Silicon technology: identified region is too small, have implacable contradiction before identified region and production cost, volume is little but cost is high.
Ultrasonic technology: equipment relative complex, cost is higher.
And existing capacitance type fingerprint identification chip, it is all on one chip integrated that main employing entirety semiconductor technology realizes digital circuit, the fingerprint Identification sensor such as the analog front circuit of fingerprint recognition, the transmission storage of data, because there is contradiction in the large area of the high integration of chip and sensor, and area little mean cog region little or identify difficulty, and large area means high cost, therefore its maximum shortcoming is that cost remains high, and cannot realize producing in enormous quantities.
Summary of the invention
The invention provides the fingerprint identification device that a kind of ito glass is made, adopt ito glass part to replace the way of silicon chip, solve the technical matters of the high and inadaptable production in enormous quantities of capacitance type fingerprint recognizer cost in prior art.
The present invention for solve the problems of the technologies described above and this ito glass fingerprint identification device that provides comprise be produced on silicon chip comprise analog front circuit, detection of identification chips that the transmission of data stores digital circuit, also comprise the capacitance type fingerprint identification sensor be produced on ito glass, described capacitance type fingerprint identification sensor connects described detection of identification chips, described capacitance type fingerprint identification sensor is fingerprint recognition chip, and the described direct nation of fingerprint recognition chip fixes on described ito glass.
The present invention adopts above-mentioned technical scheme, effectively reduces the area of silicon chip, meanwhile, can reduce circuit intermediate conversion links, reduces production cost, enhances productivity.
Accompanying drawing explanation
Fig. 1 is the principle schematic of fingerprint identification device of the present invention.
Fig. 2 is the structural representation of fingerprint identification device of the present invention.
Embodiment
In conjunction with above-mentioned accompanying drawing, specific embodiments of the invention are described.
From in Fig. 1 and Fig. 2, the fingerprint identification device of ito glass of the present invention comprise be produced on silicon chip 10 comprises analog front circuit, detection of identification chips 20 that the transmission of data stores digital circuit, also comprise the capacitance type fingerprint identification sensor 40 be produced on ito glass 30, described capacitance type fingerprint identification sensor 40 connects described detection of identification chips 20, described capacitance type fingerprint identification sensor 40 is fingerprint recognition chip, and the described direct nation of fingerprint recognition chip fixes on described ito glass 30.
The present invention is by being separated capacitance type fingerprint identification sensor with detection of identification chips, silicon chip is replaced with the ito glass of low cost, avoid too much cabling by the connected mode of COG and cause line difficult problem, reduce the overall cost of capacitance type fingerprint identification sensor.
The present invention, by multichannel drive wire to be converted to several drive wires of address wire (or serial communication line) and minority with a multiplexed analog switch chip, decreases cabling, also reduces ITO sensor design production difficulty; The line of induction, by multiplexing, decrease the number of the line of induction, reduces size and the design difficulty of connection FPC, more convenient production.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. the fingerprint identification device of an ito glass, it is characterized in that: this device comprise be produced on silicon chip (10) comprises analog front circuit, detection of identification chips (20) that the transmission of data stores digital circuit, also comprise the capacitance type fingerprint identification sensor (40) be produced on ito glass (30), described capacitance type fingerprint identification sensor (40) connects described detection of identification chips (20).
2. the fingerprint identification device of ito glass according to claim 1, is characterized in that: described capacitance type fingerprint identification sensor (40) is fingerprint recognition chip.
3. the fingerprint identification device of ito glass according to claim 2, is characterized in that: the described direct nation of fingerprint recognition chip fixes on described ito glass (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510225723.6A CN104850830A (en) | 2015-05-06 | 2015-05-06 | Fingerprint recognition device for ITO glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510225723.6A CN104850830A (en) | 2015-05-06 | 2015-05-06 | Fingerprint recognition device for ITO glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104850830A true CN104850830A (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510225723.6A Pending CN104850830A (en) | 2015-05-06 | 2015-05-06 | Fingerprint recognition device for ITO glass |
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| Country | Link |
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| CN (1) | CN104850830A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107273878A (en) * | 2017-07-26 | 2017-10-20 | 深圳市魔力信息技术有限公司 | Fingerprint sensor, chip and the equipment that safety verification is carried out by fingerprint |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120108007A1 (en) * | 2008-07-31 | 2012-05-03 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and method for manufacturing the same |
| CN103699881A (en) * | 2013-12-13 | 2014-04-02 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and mobile terminal |
| CN104079718A (en) * | 2014-06-18 | 2014-10-01 | 京东方科技集团股份有限公司 | Personal mobile terminal device with fingerprint recognition function |
| CN104538379A (en) * | 2014-12-31 | 2015-04-22 | 华天科技（西安）有限公司 | Fingerprint designing and packaging structure based on partial encapsulation technology and preparing method thereof |
-
2015
- 2015-05-06 CN CN201510225723.6A patent/CN104850830A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120108007A1 (en) * | 2008-07-31 | 2012-05-03 | Semiconductor Energy Laboratory Co., Ltd. | Semiconductor device and method for manufacturing the same |
| CN103699881A (en) * | 2013-12-13 | 2014-04-02 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and mobile terminal |
| CN104079718A (en) * | 2014-06-18 | 2014-10-01 | 京东方科技集团股份有限公司 | Personal mobile terminal device with fingerprint recognition function |
| CN104538379A (en) * | 2014-12-31 | 2015-04-22 | 华天科技（西安）有限公司 | Fingerprint designing and packaging structure based on partial encapsulation technology and preparing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107273878A (en) * | 2017-07-26 | 2017-10-20 | 深圳市魔力信息技术有限公司 | Fingerprint sensor, chip and the equipment that safety verification is carried out by fingerprint |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20170616 Address after: 528400 Guangdong city in Zhongshan province village of Torch Development Zone intersection Applicant after: Zhongshan rifda touch display technology Co. Ltd. Address before: 518000, C, Baoan District Industrial Park, Guanlan hi tech Industrial Park, Guanlan, Shenzhen, Guangdong Applicant before: Shenzhen Rifda LCD Co.,Ltd. ,OFF |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150819 |
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| RJ01 | Rejection of invention patent application after publication |