CN105426876A - Fingerprint reading device and control module of same - Google Patents
Fingerprint reading device and control module of same Download PDFInfo
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- CN105426876A CN105426876A CN201510970100.1A CN201510970100A CN105426876A CN 105426876 A CN105426876 A CN 105426876A CN 201510970100 A CN201510970100 A CN 201510970100A CN 105426876 A CN105426876 A CN 105426876A
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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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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The application discloses a fingerprint reading device and a control module of the same, wherein the fingerprint reading device comprises a packaging device and a fingerprint sensor, and the control module comprises a baseplate, an optical signal sending unit, an optical signal receiving unit and a processing chip; when an infrared light signal sent by the optical signal sending unit is reflected by a finger, the infrared light signal received by the optical signal receiving unit will be strengthened, and an electric signal amplitude converted by the optical signal receiving unit will exist a preset amplitude value; and when the amplitude value of the electric signal detected by the processing chip exceeds the preset amplitude value, sending frequency of the infrared light signal of the optical signal sending unit will be increased and the fingerprint sensor will be started. Electromagnetic field interference existing in the environment will not make the amplitude value of the electric signal exceed the preset amplitude value, so that the problem about wrong starting of the fingerprint reading device caused by the electromagnetic field interference can be avoided, and working stability of the fingerprint reading device is enhanced.
Description
Technical field
The invention belongs to automation field, more particularly, relate to a kind of fingerprint reading device and control module thereof.
Background technology
Fingerprint, as a biological characteristic of the mankind, has feature that is irreplaceable, not reproducible and uniqueness.Therefore the identification feature of fingerprint as a people is with a wide range of applications.
Carry out the fingerprint reading device of fingerprint reading as shown in Figure 1 in prior art, comprising: packaging system 100, Copper Foil 200, back lighting device 300, fingerprint sensor 400, optical prism 500 and the first process chip 600; Wherein, described fingerprint sensor 400 comprises optical lens 401, sensing chip 402 and the second process chip 403; Described packaging system 100 has through hole; Described optical prism 500 is embedded in the through hole of described packaging system 100; Described Copper Foil 200 is affixed on described optical prism 500 side; Described first process chip 600 is electrically connected with described Copper Foil 200, back lighting device 300 and sensing chip 403.When user's finger does not post described Copper Foil 200 1 side contacts with described optical prism 500, finger and described Copper Foil 200 form coupling capacitance, cause the change of described Copper Foil 200 surface charge; After described first process chip 600 detects the change of described Copper Foil 200 surface charge, back lighting device 300 described in conducting illuminates and points and start described sensing chip 402, described sensing chip 402 forms finger print image after receiving the light of finger reflection, completes the reading of finger print.For the consideration of anti-riot performance, the thickness of described optical prism 500 is larger, when finger contacts with described optical prism 500, the change of described Copper Foil 200 surface charge is very little, and therefore described process chip 300 detects that the subtle change of described Copper Foil 200 surface charge will be thrown light on by back lighting device 300 described in conducting; But when there is the interference of electromagnetic field in the environment for use on described fingerprint reading device surface, easily make described Copper Foil 200 surface charge generation subtle change, thus cause back lighting device 300 described in described first process chip 600 error starting, reduce the job stability of described fingerprint reading device.
Summary of the invention
For solving the problem, embodiments provide a kind of fingerprint reading device and control module thereof, wherein, described fingerprint reading device has higher job stability.
For achieving the above object, the invention provides following technical scheme:
A kind of fingerprint reading device control module, be applied to fingerprint reading device, described fingerprint reading device comprises packaging system and fingerprint sensor, and described control module comprises:
Substrate;
Be positioned at the light signal transmitting element of described substrate side, for outwards sending infrared signal with predeterminated frequency;
Be positioned at described substrate surface, the light signal receiving element with described light signal transmitting element homonymy, for receiving infrared signal, and is converted into electric signal;
The process chip be electrically connected with described light signal receiving element and described light signal transmitting element;
Described process chip, for judging whether the amplitude of described electric signal is greater than default amplitude, if so, then improves the transmission frequency of the infrared signal of described light signal transmitting element, and starts described fingerprint sensor.
Preferably, described light signal transmitting element is infrarede emitting diode.
Preferably, described light signal receiving element is infrared receiving diode.
Preferably, described substrate is circuit board.
Preferably, described process chip, for judging whether the amplitude of described electric signal is greater than default amplitude, if so, then controls described light signal transmitting element and continues to send infrared signal, and start described fingerprint sensor.
Preferably, second moment that send infrared signal the last with described light signal transmitting element in the first moment when described process chip amplitude the last time also for recording described electric signal is greater than default amplitude, and judge whether the difference in described first moment and the second moment is less than preset time value; If so, then control described light signal transmitting element to continue send infrared signal and start described fingerprint sensor.
A kind of fingerprint reading device, comprising:
There is the packaging system of through hole;
Be positioned at the fingerprint reading device control module of described packaging system inside, the infrared signal that described control module sends outwards is sent by described through hole;
The fingerprint sensor be electrically connected with described control module;
Described control module is the control module described in above-described embodiment.
Preferably, described fingerprint reading device also comprises:
Be fixed on the optical prism in described through hole.
Preferably, described fingerprint reading device also comprises:
Be positioned at the display device on described packaging system surface;
Described display device is electrically connected with described fingerprint sensor, for showing the fingerprint image that described fingerprint sensor obtains.
Preferably, described fingerprint sensor is complementary metal oxide semiconductor (CMOS) fingerprint sensor.
As can be seen from technique scheme, embodiments provide a kind of fingerprint reading device and control module thereof; Wherein, when the infrared signal that the light signal transmitting element of described control module sends is pointed reflection, the infrared signal that described light signal receiving element receives strengthens, and electric signal amplitude of its conversion is greater than described default amplitude; When described process chip detects that the amplitude of described electric signal is greater than described default amplitude, improve the transmission frequency of the infrared signal of described light signal transmitting element and start described fingerprint sensor, completing fingerprint and read.And the electric signal amplitude that the interference of electromagnetic field be present in environment only can make described light signal receiving element export produces subtle change, and described default amplitude can not be reached, thus avoid the problem of described fingerprint reading device error starting because of the interference of electromagnetic field, improve the job stability of described fingerprint reading device.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the structural representation of fingerprint reading device in prior art;
The structure vertical view of a kind of fingerprint reading device control module that Fig. 2 provides for one embodiment of the present of invention;
The structural representation of a kind of fingerprint reading device that Fig. 3 provides for one embodiment of the present of invention;
The structural representation of a kind of fingerprint reading device that Fig. 4 provides for a preferred embodiment of the present invention;
The structural representation of a kind of fingerprint reading device that Fig. 5 provides for a specific embodiment of the present invention.
Embodiment
As described in background, fingerprint reading device of the prior art is easily by the interference of electromagnetic field that exists in environment for use and false triggering, and job stability is low.
In view of this, embodiments provide a kind of fingerprint reading device control module, be applied to fingerprint reading device, described fingerprint reading device comprises packaging system and fingerprint sensor, and described control module comprises:
Substrate;
Be positioned at the light signal transmitting element of described substrate side, for outwards sending infrared signal with predeterminated frequency;
Be positioned at described substrate surface, the light signal receiving element with described light signal transmitting element homonymy, for receiving infrared signal, and is converted into electric signal;
The process chip be electrically connected with described light signal receiving element and described light signal transmitting element;
Described process chip, for judging whether described electric signal amplitude is greater than default amplitude, if so, then improves the transmission frequency of the infrared signal of described light signal transmitting element, and starts described fingerprint sensor.
Accordingly, the embodiment of the present invention additionally provides a kind of fingerprint reading device, comprising:
There is the packaging system of through hole;
Be positioned at the fingerprint reading device control module of described packaging system inside, the infrared signal that described control module sends outwards is sent by described through hole;
The fingerprint sensor be electrically connected with described control module;
Described control module is the control module described in above-described embodiment.
As can be seen from technique scheme, embodiments provide a kind of fingerprint reading device and control module thereof; Wherein, when the infrared signal that the light signal transmitting element of described control module sends is pointed reflection, the infrared signal that described light signal receiving element receives strengthens, and electric signal amplitude of its conversion is greater than described default amplitude; When described process chip detects that the amplitude of described electric signal is greater than described default amplitude, improve the transmission frequency of the infrared signal of described light signal transmitting element and start described fingerprint sensor, completing fingerprint and read.And the electric signal amplitude that the interference of electromagnetic field be present in environment only can make described light signal receiving element export produces subtle change, and described default amplitude can not be reached, thus avoid the problem of described fingerprint reading device error starting because of the interference of electromagnetic field, improve the job stability of described fingerprint reading device.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiments provide a kind of fingerprint reading device control module, be applied to fingerprint reading device, described fingerprint reading device comprises packaging system and fingerprint sensor, and as shown in Figure 2, described control module comprises:
Substrate A101;
Be positioned at the light signal transmitting element A102 of described substrate A101 side, for outwards sending infrared signal with predeterminated frequency;
Be positioned at described substrate A101 surface, the light signal receiving element A103 with described light signal transmitting element A102 homonymy, for receiving infrared signal, and is converted into electric signal;
The process chip A104 be electrically connected with described light signal receiving element A103 and described light signal transmitting element A102;
Described process chip A104, for judging whether the amplitude of described electric signal is greater than default amplitude, if so, then improves the transmission frequency of the infrared signal of described light signal transmitting element, and starts described fingerprint sensor.
The form of the described control module shown in Fig. 2 is only in order to clearly show the electrical connection of described process chip A104 and described light signal receiving element A103 and light signal transmitting element A102; In the present embodiment, described process chip A104 is mounted on described substrate A101, and the connection wire of itself and described light signal receiving element A103 and described light signal transmitting element A102 is printed on described substrate A101.But the present invention does not limit this, specifically depending on actual conditions.
It should be noted that, in other embodiments of the invention, described light signal transmitting element A102 outwards sends burst pulse infrared signal with predeterminated frequency; When described burst pulse infrared signal is pointed reflection, the infrared signal that described light signal receiving element A103 receives strengthens, and the electric signal amplitude of its conversion is greater than described default amplitude; When described process chip A104 detects that the amplitude of described electric signal is greater than described default amplitude, the transmission frequency adjusting the infrared signal of described light signal transmitting element A102 makes it to meet the backlighting requirements that described fingerprint sensor gathers fingerprint, and starts described fingerprint sensor; Described fingerprint sensor receives the infrared light of finger reflection, completes the reading of finger print.The advantage that described light signal transmitting element A102 sends burst pulse infrared signal is that power consumption is few.But the pulse length of the present invention to the infrared signal that described light signal transmitting element A102 sends does not limit, specifically depending on actual conditions.And the concrete value of the present invention to described predeterminated frequency does not limit, specifically depending on actual conditions.
Also it should be noted that, in the present embodiment, the wavelength of the infrared signal that described light signal transmitting element A102 outwards sends is preset wavelength; The wave band of the infrared signal that can receive with described light signal receiving element A103 matches, and can reduce spuious infrared light in described control module environment for use so to a certain extent to its impact.But the wavelength of the present invention to the infrared signal that described light signal transmitting element A102 outwards sends does not limit, as long as the wave band of the infrared signal that can receive with described light signal receiving element A103 mates, specifically depending on actual conditions.The spuious infrared light meeting described light signal receiving element A103 receiving wave range is likely there is in environment; When described light signal receiving element A103 receives described spuious infrared light, can electric signal be converted into and be detected by described process chip A104 equally; But the intensity of the spuious infrared light in general environment is lower, the amplitude that described light signal receiving element A103 is converted into electric signal is also lower, therefore the object arranging described default amplitude is to avoid described process chip A104 when described light signal receiving element A103 receives spuious infrared light, control the situation generation that described light signal transmitting element A102 continues to send infrared signal, enhance the job stability of described fingerprint reading device; Avoid the power wastage caused because light signal transmitting element A102 described in spuious infrared light false triggering continues to send infrared signal simultaneously, reduce the power consumption of described fingerprint reading device.
On the basis of above-described embodiment, in yet another embodiment of the present invention, described light signal transmitting element A102 and light signal receiving element A103 is preferably set up in parallel and described substrate A101 side.When the infrared signal that described light signal transmitting element A102 sends is reflected, the described light signal receiving element A103 be set up in parallel with it can as much as possiblely receive described by the infrared signal reflected.Because described infrared signal is reflected into diffuse reflection at finger surface, therefore other positions that described light signal receiving element A103 is arranged at described substrate A101 also can receive described by the infrared signal of finger reflection, in other embodiments of the invention, described light signal receiving element A103 and described light signal transmitting element A102 is arranged at the same side of described substrate A101, the present invention does not limit this, specifically depending on actual conditions.
On the basis of above-described embodiment, in another embodiment of the present invention, described process chip A104 for judging whether the amplitude of described electric signal is greater than default amplitude, if, then control described light signal transmitting element A102 to continue to send infrared signal, and start described fingerprint sensor.In the present embodiment, described process chip A104 is when the amplitude of described electric signal is greater than default amplitude, control described light signal transmitting element A102 to continue to send the advantage of infrared signal and be to provide sufficient backlight for described fingerprint sensor, the fingerprint image that described fingerprint sensor is obtained is more clear, but adds the power consumption of described fingerprint reading device simultaneously.When the amplitude of the present invention to described electric signal is greater than default amplitude, the mode that described process chip A104 controls described light signal transmitting element A102 transmission infrared signal does not limit, specifically depending on actual conditions.
On the basis of above-described embodiment, in another preferred embodiment of the invention, second moment that send infrared signal the last with described light signal transmitting element A102 in the first moment when described process chip A104 amplitude the last time also for recording described electric signal is greater than default amplitude, and judge whether the difference in described first moment and the second moment is less than preset time value; If so, then control described light signal transmitting element A102 to continue send infrared signal and start described fingerprint sensor.
It should be noted that, in the present embodiment, because described light signal receiving element A103 is almost negligible by the time of infrared light switching electrical signals, therefore, described first moment is equal to the moment that described light signal receiving element A103 the last time receives infrared signal.If the difference in described first moment and the second moment is less than preset time value, then substantially can determine that the infrared signal that described light signal receiving element A103 receives is sent by described light signal transmitting element A102, avoid spuious infrared light in environment on the impact of described control module further, thus strengthen the job stability of described fingerprint reading device.
Also it should be noted that, because the numerical value of the light velocity is very large, sends infrared signal, reflect to by finger from described light signal transmitting element A102, it is very short for finally being received institute's elapsed time by described light signal receiving element A103; Therefore, described preset time value can be set to very little time value, such as 1ms, a 0.1ms etc.But the concrete value of the present invention to described preset time value does not limit, specifically depending on actual conditions.
On the basis of above-described embodiment, in one embodiment of the invention, described substrate A101 is circuit board.Circuit board is to realize described light signal transmitting element A102, light signal receiving element A103 as the advantage of described substrate A101, the position of process chip A104 is fixed; And described light signal transmitting element A102, electrical connection between light signal receiving element A103, process chip A104 can be realized by the wire be printed on described circuit board, enhance the electrical connection stability of described control module.But the concrete kind of the present invention to described substrate A101 does not limit, specifically depending on actual conditions.
On the basis of above-described embodiment, in another embodiment of the present invention, described light signal transmitting element A102 is infrarede emitting diode.The specific implementation form of the present invention to described light signal transmitting element A102 does not limit, specifically depending on actual conditions.
On the basis of above-described embodiment, in yet another embodiment of the present invention, described light signal receiving element A103 is infrared receiving diode.The specific implementation form of the present invention to described light signal receiving element A103 does not limit, specifically depending on actual conditions.
In sum, embodiments provide a kind of fingerprint reading device control module, when the infrared signal that the light signal transmitting element A102 of described control module sends is pointed reflection, the infrared signal that described light signal receiving element A103 receives strengthens, and the electric signal amplitude of its conversion is greater than described default amplitude; When described process chip A104 detects that the amplitude of described electric signal is greater than described default amplitude, adjust the transmission frequency of the infrared signal of described light signal transmitting element A102, make it meet the job requirement of described fingerprint sensor, and start described fingerprint sensor; Described fingerprint sensor receives the infrared light of finger reflection, completes the reading of finger print.And the electric signal amplitude that the interference of electromagnetic field be present in environment only can make described light signal receiving element export produces subtle change, and described default amplitude can not be reached, thus avoid the problem of described fingerprint reading device error starting because of the interference of electromagnetic field, improve the job stability of described fingerprint reading device.
Accordingly, the embodiment of the present invention additionally provides a kind of fingerprint reading device, as shown in Figure 3, comprising:
There is the packaging system A100 of through hole;
Be positioned at the fingerprint reading device control module A200 of described packaging system A100 inside, the infrared signal that described control module A200 sends outwards is sent by described through hole;
The fingerprint sensor A300 be electrically connected with described control module A200;
Described control module A200 is the control module A200 described in above-mentioned any embodiment.
It should be noted that, Fig. 3 is only the structural representation of described fingerprint reading device, and the concrete shape of the present invention to the concrete structure of described fingerprint reading device and described packaging system does not limit, specifically depending on actual conditions.In the present embodiment, when finger appears at the position of described through hole, the infrared signal that described light signal transmitting element A102 sends is pointed reflection, described light signal receiving element A103 receives by after the infrared signal of finger reflection, and the electric signal amplitude of its conversion is greater than described default amplitude; When the amplitude of described process chip A104 is greater than described default amplitude, the transmission frequency adjusting the infrared signal of described light signal transmitting element A102 makes it to meet the backlighting requirements that described fingerprint sensor gathers fingerprint, and starts described fingerprint sensor; Described fingerprint sensor receives the infrared light of finger reflection, completes the reading of finger print.In addition, in other embodiments of the invention, described light signal transmitting element A102 outwards sends burst pulse infrared signal with predeterminated frequency; When described burst pulse infrared signal is pointed reflection, the infrared signal that described light signal receiving element A103 receives strengthens, the electric signal also corresponding enhancing of its conversion; When described process chip A104 detects that described electric signal strengthens, the transmission frequency adjusting the infrared signal of described light signal transmitting element A102 makes it to meet the backlighting requirements that described fingerprint sensor A300 gathers fingerprint, described fingerprint sensor A300 receives the infrared light of finger reflection, completes the reading of finger print.The advantage that described light signal transmitting element A102 sends burst pulse infrared signal is that power consumption is few.The pulse length of the present invention to the infrared signal that described light signal transmitting element A102 sends does not limit, specifically depending on actual conditions.And the concrete value of the present invention to described predeterminated frequency does not limit, specifically depending on actual conditions.
Also it should be noted that, in the present embodiment, the wavelength of the infrared signal that described light signal transmitting element A102 outwards sends is preset wavelength; The wave band of the infrared signal that can receive with described light signal receiving element A103 matches, and can reduce spuious infrared light in described control module A200 environment for use so to a certain extent to its impact.But the wavelength of the present invention to the infrared signal that described light signal transmitting element A102 outwards sends does not limit, as long as the wave band of the infrared signal that can receive with described light signal receiving element A103 mates, specifically depending on actual conditions.The spuious infrared light meeting described light signal receiving element A103 receiving wave range is likely there is in environment; When described light signal receiving element A103 receives described spuious infrared light, can electric signal be converted into and be detected by described process chip A104 equally; The object arranging described default amplitude avoids described process chip A104 when described light signal receiving element A103 receives spuious infrared light, control the situation generation that described light signal transmitting element A102 continues to send infrared signal, enhance the job stability of described fingerprint reading device, avoid the power wastage caused because of control module A200 described in spuious infrared light false triggering simultaneously, reduce the power consumption of described fingerprint reading device.And in the present embodiment, described light signal transmitting element A102 has the function of Copper Foil 200 of the prior art and described light emitting diode simultaneously, simplify the structure of described fingerprint reading device, simplify the installation steps of described fingerprint reading device, reduce the cost of described fingerprint reading device simultaneously.
In the present embodiment, described fingerprint sensor A300 comprises: optical lens A301, sensing chip A302 and the second process chip A403.Because the concrete structure of described fingerprint sensor A300 and connected mode are well known to those skilled in the art, the present invention does not repeat at this.
On the basis of above-described embodiment, in yet another embodiment of the present invention, described light signal transmitting element A102 and light signal receiving element A103 is preferably set up in parallel and described substrate A101 side.When the infrared signal that described light signal transmitting element A102 sends is reflected, the described light signal receiving element A103 be set up in parallel with it can as much as possiblely receive described by the infrared signal reflected.Because described infrared signal is reflected into diffuse reflection at finger surface, therefore other positions that described light signal receiving element A103 is arranged at described substrate A101 also can receive described by the infrared signal of finger reflection, in other embodiments of the invention, described light signal receiving element A103 and described light signal transmitting element A102 is arranged at the same side of described substrate A101, the present invention does not limit this, specifically depending on actual conditions.
On the basis of above-described embodiment, in a preferred embodiment of the invention, described process chip A104 is used for when the amplitude of described electric signal is greater than default amplitude, controls described light signal transmitting element A102 and continues to send infrared signal, and start described fingerprint sensor.In the present embodiment, described process chip A104 is when the amplitude of described electric signal is greater than default amplitude, control described light signal transmitting element A102 to continue to send the advantage of infrared signal and be to provide sufficient backlight for described fingerprint sensor, the fingerprint image that described fingerprint sensor A300 is obtained is more clear, but adds the power consumption of described fingerprint reading device simultaneously.When the amplitude of the present invention to described electric signal is greater than default amplitude, the mode that described process chip A104 controls described light signal transmitting element A102 transmission infrared signal does not limit, specifically depending on actual conditions.
On the basis of above-described embodiment, in another preferred embodiment of the invention, second moment that send infrared signal the last with described light signal transmitting element A102 in the first moment when described process chip A104 amplitude the last time also for recording described electric signal is greater than default amplitude, and judge whether the difference in described first moment and the second moment is less than preset time value; If so, then control described light signal transmitting element A102 to continue send infrared signal and start described fingerprint sensor.
It should be noted that, in the present embodiment, because described light signal receiving element A103 is almost negligible by the time of infrared light switching electrical signals, therefore, described first moment is equal to the moment that described light signal receiving element A103 the last time receives infrared signal.If the difference in described first moment and the second moment is less than preset time value, then substantially can determine that the infrared signal that described light signal receiving element A103 receives is sent by described light signal transmitting element A102, avoid spuious infrared light in environment on the impact of described control module A200 further, thus strengthen the job stability of described fingerprint reading device.
Also it should be noted that, because the numerical value of the light velocity is very large, sends infrared signal, reflect to by finger from described light signal, it is very short for finally being received institute's elapsed time by described light signal receiving element A103; Therefore, described preset time value can be set to very little time value, such as 1ms, a 0.1ms etc.But the concrete value of the present invention to described preset time value does not limit, specifically depending on actual conditions.
On the basis of above-described embodiment, in one embodiment of the invention, described substrate A101 is circuit board.Circuit board is to realize described light signal transmitting element A102, light signal receiving element A103 as the advantage of described substrate A101, the position of process chip A104 is fixed; And described light signal transmitting element A102, electrical connection between light signal receiving element A103, process chip A104 can be realized by the wire be printed on described circuit board, enhance the electrical connection stability of described control module A200.But the concrete kind of the present invention to described substrate A101 does not limit, specifically depending on actual conditions.
On the basis of above-described embodiment, in one particular embodiment of the present invention, as shown in Figure 4, described fingerprint reading device also comprises:
Be fixed on the optical prism A400 in described through hole.
Described optical prism A400 for the protection of described fingerprint reading device inner member not by dust or water oxygen contamination.
On the basis of above-described embodiment, in another specific embodiment of the present invention, as shown in Figure 5, described fingerprint reading device also comprises:
Be positioned at the display device 17 on described packaging system A100 surface;
Described display device 17 is electrically connected with described fingerprint sensor A300, for showing the fingerprint image that described fingerprint sensor A300 obtains.
It should be noted that, display device 17 described in Fig. 5 is only a kind of possible position and shape, and the present invention does not limit, specifically depending on actual conditions described display device 17 position and concrete shape.
On the basis of above-described embodiment, in a preferred embodiment of the invention, described fingerprint sensor A300 is complementary metal oxide semiconductor (CMOS) fingerprint sensor A300.But in other embodiments of the invention, described fingerprint sensor A300 is charge coupled cell fingerprint sensor A300.The concrete kind of the present invention to described fingerprint sensor A300 does not limit, specifically depending on actual conditions.
In sum, a kind of fingerprint reading device and control module A200 thereof is embodiments provided; Wherein, when the infrared signal that the light signal transmitting element A102 of described control module A200 sends is pointed reflection, the infrared signal that described light signal receiving element A103 receives strengthens, and the electric signal amplitude of its conversion is greater than described default amplitude; When described process chip A104 detects that the amplitude of described electric signal is greater than described default amplitude, adjust the transmission frequency of the infrared signal of described light signal transmitting element A102, make it meet the job requirement of described fingerprint sensor A300, and start described fingerprint sensor A300; Described fingerprint sensor A300 receives the infrared light of finger reflection, completes the reading of finger print.And the electric signal amplitude that the interference of electromagnetic field be present in environment only can make described light signal receiving element export produces subtle change, and described default amplitude can not be reached, thus avoid the problem of described fingerprint reading device error starting because of the interference of electromagnetic field, improve the job stability of described fingerprint reading device.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a fingerprint reading device control module, is applied to fingerprint reading device, and described fingerprint reading device comprises packaging system and fingerprint sensor, it is characterized in that, described control module comprises:
Substrate;
Be positioned at the light signal transmitting element of described substrate side, for outwards sending infrared signal with predeterminated frequency;
Be positioned at described substrate surface, the light signal receiving element with described light signal transmitting element homonymy, for receiving infrared signal, and is converted into electric signal;
The process chip be electrically connected with described light signal receiving element and described light signal transmitting element;
Described process chip, for judging whether the amplitude of described electric signal is greater than default amplitude, if so, then improves the transmission frequency of the infrared signal of described light signal transmitting element, and starts described fingerprint sensor.
2. control module according to claim 1, is characterized in that, described light signal transmitting element is infrarede emitting diode.
3. control module according to claim 1, is characterized in that, described light signal receiving element is infrared receiving diode.
4. control module according to claim 1, is characterized in that, described substrate is circuit board.
5. control module according to claim 1, it is characterized in that, described process chip for judging whether the amplitude of described electric signal is greater than default amplitude, if, then control described light signal transmitting element to continue to send infrared signal, and start described fingerprint sensor.
6. control module according to claim 5, it is characterized in that, second moment that send infrared signal the last with described light signal transmitting element in the first moment when described process chip amplitude the last time also for recording described electric signal is greater than default amplitude, and judge whether the difference in described first moment and the second moment is less than preset time value; If so, then control described light signal transmitting element to continue send infrared signal and start described fingerprint sensor.
7. a fingerprint reading device, is characterized in that, comprising:
There is the packaging system of through hole;
Be positioned at the fingerprint reading device control module of described packaging system inside, the infrared signal that described control module sends outwards is sent by described through hole;
The fingerprint sensor be electrically connected with described control module;
Described control module is the control module described in any one of claim 1-6.
8. fingerprint reading device according to claim 7, is characterized in that, described fingerprint reading device also comprises:
Be fixed on the optical prism in described through hole.
9. fingerprint reading device according to claim 7, is characterized in that, described fingerprint reading device also comprises:
Be positioned at the display device on described packaging system surface;
Described display device is electrically connected with described fingerprint sensor, for showing the fingerprint image that described fingerprint sensor obtains.
10. fingerprint reading device according to claim 7, is characterized in that, described fingerprint sensor is complementary metal oxide semiconductor (CMOS) fingerprint sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510970100.1A CN105426876A (en) | 2015-12-22 | 2015-12-22 | Fingerprint reading device and control module of same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510970100.1A CN105426876A (en) | 2015-12-22 | 2015-12-22 | Fingerprint reading device and control module of same |
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| CN105426876A true CN105426876A (en) | 2016-03-23 |
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| CN201510970100.1A Pending CN105426876A (en) | 2015-12-22 | 2015-12-22 | Fingerprint reading device and control module of same |
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| CN (1) | CN105426876A (en) |
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| CN106774927A (en) * | 2016-12-30 | 2017-05-31 | 珠海市魅族科技有限公司 | Electronic equipment and its control method |
| RU2728842C2 (en) * | 2017-07-27 | 2020-07-31 | Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд. | Method and device for optical fingerprint recognition and computer-readable data medium |
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Cited By (7)
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| CN106462756A (en) * | 2016-09-17 | 2017-02-22 | 深圳市汇顶科技股份有限公司 | Fingerprint acquisition apparatus and method, terminal device, and control method of on-off of screen |
| WO2018049637A1 (en) * | 2016-09-17 | 2018-03-22 | 深圳市汇顶科技股份有限公司 | Fingerprint acquisition device and method, terminal apparatus and method for controlling screen to turn on and off |
| EP3319011A4 (en) * | 2016-09-17 | 2018-09-26 | Shenzhen Goodix Technology Co., Ltd. | Fingerprint acquisition device and method, terminal apparatus and method for controlling screen to turn on and off |
| CN106462756B (en) * | 2016-09-17 | 2019-08-23 | 深圳市汇顶科技股份有限公司 | The control method of fingerprint acquisition device and method, terminal device and screen light on and off |
| US10410031B2 (en) | 2016-09-17 | 2019-09-10 | Shenzhen GOODIX Technology Co., Ltd. | Fingerprint acquisition apparatus and method, terminal device, and method for controlling a screen to be on or off |
| CN106774927A (en) * | 2016-12-30 | 2017-05-31 | 珠海市魅族科技有限公司 | Electronic equipment and its control method |
| RU2728842C2 (en) * | 2017-07-27 | 2020-07-31 | Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд. | Method and device for optical fingerprint recognition and computer-readable data medium |
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Application publication date: 20160323 |