CN108334763B - Biometric information sensing device and electronic device - Google Patents
Biometric information sensing device and electronic device Download PDFInfo
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- CN108334763B CN108334763B CN201810055065.4A CN201810055065A CN108334763B CN 108334763 B CN108334763 B CN 108334763B CN 201810055065 A CN201810055065 A CN 201810055065A CN 108334763 B CN108334763 B CN 108334763B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
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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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- 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
- G06V40/70—Multimodal biometrics, e.g. combining information from different biometric modalities
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Abstract
The invention discloses a biological characteristic information sensing device and an electronic device, wherein the biological characteristic information sensing device comprises a plurality of sensing units and a controller; the controller is configured to: when the sensing of the biological characteristic information is executed, the intensity of current environment light is obtained, when the intensity of the current environment light is larger than or equal to a preset first intensity threshold value, a light source required when the light sensing is executed is controlled to be closed, and the plurality of sensing units are controlled to execute the light sensing; the sensing unit is used for: sensing biometric information of a target object in contact with or in proximity to the sensing device according to control of the controller. The electronic equipment comprises the biological characteristic information sensing device.
Description
Technical Field
The invention relates to a biological characteristic information sensing device and electronic equipment.
Background
At present, biological feature identification such as fingerprints has gradually become a standard component of electronic products such as mobile terminals. Since optical fingerprinting has a stronger penetrating power than capacitive fingerprinting, the application of optical fingerprinting to mobile terminals is a future trend, but the sensing effect of optical fingerprinting at present needs to be improved.
Disclosure of Invention
The embodiment of the invention aims to solve at least one technical problem in the prior art. Therefore, the embodiments of the present invention need to provide a biometric information sensing apparatus and an electronic device.
The embodiment of the invention provides a biological characteristic information sensing device, which comprises a plurality of sensing units and a controller; the controller is configured to: when sensing of biological characteristic information is executed, the intensity of current environment light is obtained, when the intensity of the current environment light is larger than or equal to a preset first intensity threshold value, a light source required in light sensing execution is controlled to be closed, and the plurality of sensing units are controlled to execute light sensing; the sensing unit is used for: sensing biometric information of a target object in contact with or in proximity to the sensing device according to control of the controller.
In the embodiment of the invention, before sensing the biological characteristic information, the intensity of the current ambient light is acquired, and the light source is turned off when the current ambient light is too strong, so that the sensing device senses the biological characteristic information of the target object approaching or touching the sensing device by using the ambient light penetrating through the target object. Thus, the sensing of the biological characteristic information can be carried out in the outdoor environment, and the sensing precision of the biological characteristic information is improved.
In some embodiments, the biometric information sensing device further comprises the light source.
In some embodiments, the light signal emitted by the light source comprises one or more of infrared, ultraviolet, white, blue, green light. Through the selection of the light source, the sensing of the biological characteristic information can be realized, and the living body detection of the target object can also be realized, so that the safety of biological characteristic identification is improved.
In certain embodiments, the controller is further configured to: and when the intensity of the current ambient light is smaller than the first intensity threshold value, controlling the light source to be started, and controlling the plurality of sensing units to perform light sensing.
In certain embodiments, the controller is further configured to: and correspondingly adjusting the intensity of the optical signal emitted by the light source according to the intensity of the current ambient light. Therefore, the sensing of the sensing device can be realized, and the electric quantity is saved.
In certain embodiments, the controller is further configured to: and when the sensing units are controlled to perform light sensing, determining a contact area of the target object, and controlling the sensing units corresponding to the contact area to perform light sensing. Thus, not only is sensing of the biological characteristic information of the target object realized, but also all sensing units are prevented from working, so that the sensing power consumption is reduced, and the sensing speed is increased.
In certain embodiments, the controller is further configured to: when sensing of biometric information is performed, a predetermined plurality of sensing units are controlled to perform light sensing to acquire the intensity of the current ambient light. In the embodiment of the invention, the sensing unit senses the current ambient light by using the photosensitive characteristic of the sensing unit, and obtains the intensity of the current ambient light according to the sensing signal. The sensing device is used for sensing the intensity of the ambient light, so that the cost for additionally arranging the light sensor is saved.
In some embodiments, the biometric information sensing device further comprises: a light sensor for acquiring an intensity of the current ambient light when performing sensing of the biometric information.
In certain embodiments, the controller is further configured to: when sensing of the biological characteristic information is executed, an external light sensor is called to carry out photosensitive operation, and the intensity of current ambient light acquired by the external light sensor is received. In the embodiment of the invention, the external light sensor is used for sensing the ambient light intensity, so that the cost for additionally arranging the light sensor is saved.
In some embodiments, the biometric information sensing device further comprises: and the processing unit is used for processing the sensing signals output by the plurality of sensing units and obtaining the biological characteristic information of the target object.
In some embodiments, the sensing units are integrated in a sensing chip, the controller is integrated in a control chip, and the processing unit is integrated in a processing chip; or, the sensing units, the controller and the processing unit are integrated on one chip.
In some embodiments, the light source is provided independently, or the light source is integrated with the plurality of sensing units.
In some embodiments, the biometric information sensing device includes any one or more of a fingerprint sensing device, a pulse sensing device, a blood oxygen sensing device, and a heartbeat sensing device.
In some embodiments, the biometric information sensing device further comprises an encapsulating housing for encapsulating the sensing unit, the light source, and the controller.
An electronic device according to an embodiment of the present invention includes the biometric information sensing device according to any one of the above embodiments.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
The above and/or additional aspects and advantages of embodiments of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an optical biometric information sensing structure applied to an electronic device in the prior art;
FIG. 2 is a flow chart of a method for sensing biometric information according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of the electronic device according to the present invention turning off the light source for sensing when sensing biometric information;
FIG. 4 is a schematic front view of an electronic device according to an embodiment of the invention;
FIG. 5 is a flow chart of a method for sensing biometric information according to another embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a biometric information sensing device according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a biometric information sensing apparatus according to another embodiment of the present invention;
FIG. 8 is a functional block diagram of an electronic device according to an embodiment of the invention;
FIG. 9 is a schematic structural diagram of a biometric information sensing device and a display panel of an electronic apparatus according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a biometric information sensing device and a display panel in an electronic apparatus according to another embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. "contact" or "touch" includes direct contact or indirect contact. For example, the sensing device disclosed below may be directly contacted by a user's finger if it is disposed in a housing aperture of the electronic device, exposing the housing, but indirectly contacted by the user's finger through a protective cover plate if it is disposed inside the electronic device, e.g., underneath the protective cover plate.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, certain example components and settings are described below. Of course, they are merely examples and are not intended to limit the present invention. Moreover, the present disclosure may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Further, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other structures, components, etc. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.
Referring to fig. 1, an optical biometric device, for example, a fingerprint recognition device includes a substrate 101, a plurality of sensing units 102 disposed on the substrate 101, a light source 103, and a cover plate 104 disposed above the sensing units 102 and the light source 103. When the finger 200 approaches or touches the cover plate 104, the light signal emitted by the light source 103 reaches the finger 200, the light signal reflected by the surface of the finger 200 can be sensed by the sensing unit 102, and since the surface texture of the finger 200 includes valleys and ridges, and the valleys and ridges have different reflection degrees for the light signal, a fingerprint image of the finger 200 can be formed according to the sensing signal of the sensing unit 102.
Compared with a capacitive fingerprint identification device, the optical fingerprint identification device has stronger penetrating power, can be applied to electronic equipment, and is particularly positioned under a screen of the electronic equipment or even in the screen. However, the optical fingerprint identification device cannot be applied to places with strong light, such as an outdoor environment with strong sunlight, and the light will penetrate through the finger 200 and be sensed by the sensing unit 102 due to strong outdoor environment light, so that normal sensing of the sensing unit 102 is affected, and sensing accuracy of the optical fingerprint identification device is affected. Therefore, the invention provides a new sensing method, which can be applied to sensing of the biological characteristic information in the strong light environment and improves the sensing precision of the biological characteristic information.
Referring to fig. 2, an embodiment of the present invention provides a biometric information sensing method of an electronic device, including:
step S110, acquiring the intensity of the current ambient light when sensing of the biological characteristic information is executed;
step S111, judging whether the intensity of the current ambient light is greater than or equal to a preset first intensity threshold value; if yes, executing step S112, otherwise executing step S113;
step S112, when the intensity of the current ambient light is greater than or equal to a preset first intensity threshold, turning off the light source, and sensing biological characteristic information of a target object approaching or touching the sensing device by using the ambient light;
step S113, when the intensity of the current ambient light is smaller than a preset first intensity threshold, turning on the light source, and the sensing device performs sensing of the biometric information on the target object approaching or touching the sensing device by using the light signal emitted by the light source.
The electronic device comprises a light source and a sensing device, wherein the sensing device is used for sensing the biological characteristic information of a target object approaching or touching the sensing device. Specifically, the biometric information includes, but is not limited to, skin texture information such as fingerprints, palm prints, ear prints, and soles of feet, and other biometric information such as heart rate, blood oxygen concentration, and veins. The target object is, for example, but not limited to, a human body, but may be other suitable types of objects. The light source can be a light source of the sensing device. If the electronic equipment is provided with the display panel, the display panel can be controlled to be lightened to serve as a light source to emit light signals, and therefore the cost of additionally arranging the light source is saved.
Taking the target object as a finger as an example, when the finger approaches or touches the sensing device, if the finger is illuminated by ambient light, and the finger has many tissue structures, such as epidermis, bone, flesh, blood vessels, etc., a part of the optical signal in the ambient light will penetrate through the finger, and a part of the optical signal will be absorbed by the finger. The stronger the intensity of the ambient light, the stronger the intensity of the light signal penetrating the finger, and the inventors have also found in their research that, when the intensity of the ambient light reaches a certain level, a fingerprint image of the finger can be formed based on the sensing signal sensing the ambient light penetrating the finger. The first intensity threshold is a critical value reaching a certain degree.
When a target object is placed on the sensing device, the sensing device is activated and starts to perform sensing of biometric information. Before the sensing device starts to sense the biological characteristic information, the intensity of the current environment light is acquired, so that the light source is controlled to be turned on or off according to the intensity of the current environment light, and the sensing device senses the biological characteristic information by using different light signals.
In the embodiment of the present invention, a specific value of the first intensity threshold is set in advance. And when the current intensity of the ambient light is judged to be greater than or equal to the first intensity threshold value, the light source is turned off, so that the sensing device senses the biological characteristic information of the target object close to or touching the sensing device by using the ambient light. In particular, referring to fig. 3, when a finger approaches or touches the sensing device, the light source is turned off because the ambient light intensity exceeds the first intensity threshold. The sensing device senses an optical signal of the finger penetrated by the ambient light and forms a fingerprint image of the finger according to the sensing signal.
And when the intensity of the current environment light is judged to be smaller than the first intensity threshold value, the light source is started, so that the sensing device senses the biological characteristic information of the target object close to or touching the sensing device by using the light signal emitted by the light source. As shown in fig. 1, when a finger approaches or touches the sensing device, the light source emits a light signal to the finger, the light signal reflected by the surface of the finger is sensed by the sensing device, and a fingerprint image of the finger is formed according to the sensed signal.
Before sensing the biological characteristic information, the embodiment of the invention firstly acquires the intensity of the current ambient light and turns off the light source when the current ambient light is too strong, so that the sensing device senses the biological characteristic information of the target object approaching or touching the sensing device by using the ambient light penetrating through the target object; otherwise, the light source is turned on, so that the sensing device senses the biological characteristic information of the target object approaching or touching the sensing device by using the optical signal of the light source. Thus, the sensing of the biometric information can be performed both indoors and outdoors, and the sensing accuracy of the biometric information is improved.
In order to avoid the ambient light penetrating through the finger from affecting the sensing of the sensing device when the sensing device utilizes the optical signal of the light source to sense the biometric information, in an embodiment of the present invention, the step S113 further includes: and correspondingly adjusting the intensity of the optical signal emitted by the light source according to the intensity of the current ambient light. Specifically, the stronger the current ambient light intensity is, the greater the light signal intensity emitted by the light source; the weaker the current ambient light intensity is, the lower the intensity of the light signal emitted by the light source is. When the ambient light is strong, the light signal penetrating through the finger is relatively strong, so that the intensity of the light signal emitted by the light source is increased, the light signal reflected by the surface of the finger is relatively strong, and the influence caused by the ambient light can be reduced to a certain extent. When the ambient light is weak, the light signal penetrating through the finger is weak, so that the sensing of the sensing device is basically not influenced, the intensity of the light signal emitted by the light source is weakened, the sensing of the sensing device can be realized, and the electric quantity is saved.
In some embodiments, the light source comprises a plurality of light emitting elements, and the step S113 further comprises: and when the intensity of the current ambient light is less than the first intensity threshold value, controlling the plurality of light-emitting elements to be lightened. The light emitting element is used to emit light of a single color, such as white light, blue light, green light, ultraviolet light, infrared light, and the like. Due to the selection of the light source, the sensing of the biological characteristic information can be realized, and the living body detection of the target object can also be realized, so that the safety of biological characteristic identification is improved.
In some embodiments, the electronic device further comprises a display screen, and the display screen comprises a plurality of display units. Step S113 further includes: when the intensity of the current environment light is smaller than the first intensity threshold value, a contact area of the target object is determined, and a plurality of display units corresponding to the contact area are controlled to be lightened. Specifically, the display screen includes a plurality of display units, and the display screen emits an optical signal when being lighted, so that when the intensity of the current ambient light is smaller than the first intensity threshold, the display screen is controlled to be lighted, so that the sensing device senses the biological characteristic information by using the optical signal emitted by the display screen. Further, when the display screen is lighted, the contact area of the target object may be determined, and then the plurality of display units corresponding to the contact area may be controlled to be lighted. Therefore, through the determination of the contact area, the sensing of the biological characteristic information is realized, and the lightening of all the display units is avoided, so that the electric quantity is saved.
In some embodiments, the step S113 further includes: the plurality of display units corresponding to the contact areas are controlled to emit light signals of the same wavelength band, that is, the plurality of display units emit light signals of the same color, such as white light, blue light, green light, and the like. The plurality of display units are controlled to send out the optical signals of the same wave band, so that each sensing unit in the sensing device can sense the same optical signals, and the sensing effect of the sensing device is improved.
In some embodiments, the sensing device includes a plurality of sensing units, and the sensing device is applied to the biometric feature recognition of the target object in the screen of the electronic device, and when the sensing device is controlled to sense the biometric feature information, all the sensing units are scanned to drive the sensing units to perform the light sensing one by one, and the biometric feature information of the target object is formed according to the sensing signals obtained by all the sensing units. Of course, since the contact area of the target object is smaller than the size of the display area, when the sensing device is controlled to sense the biometric information, the contact area of the target object may be determined first, and the sensing unit corresponding to the contact area may be controlled to sense the biometric information. Thus, not only is sensing of the biometric information of the target object achieved, but also all sensing units are prevented from operating, thereby reducing sensing power consumption and accelerating sensing speed.
In certain embodiments, step S110 comprises: when sensing of the biological characteristic information is executed, the intensity of current ambient light is acquired by using a sensing device; or, the intensity of the current ambient light is acquired by using a light sensor arranged on the electronic device. Specifically, since the sensing device includes a plurality of sensing units, the optical signal is sensed by the plurality of sensing units, and the sensing signal is obtained. Therefore, in the embodiment of the present invention, the sensing unit senses the current ambient light by using the light sensing characteristic of the sensing unit, and obtains the intensity of the current ambient light according to the sensing signal. The sensing device is used for sensing the intensity of the ambient light, so that the cost for additionally arranging the light sensor is saved.
In addition, a light sensor may also be disposed on the electronic device for collecting the intensity of the current ambient light. For example, electronic devices such as a mobile phone, a palm computer, a tablet computer and the like are all provided with corresponding light sensors. Referring to fig. 4, the electronic device 1 is a mobile phone, the front of the mobile phone is a display 11, and the upper end of the mobile phone is provided with a front-facing camera 12, a light sensor 13, and an earpiece 14. In the embodiment of the invention, the front camera or the light sensor of the mobile phone can be used for acquiring the intensity of the current ambient light.
In certain embodiments, referring to fig. 5, fig. 5 illustrates the steps of a biometric information sensing method according to another embodiment of the present invention. In this embodiment, after step S112 or S113, the method further includes:
and step S114, verifying the biological characteristic information obtained by sensing the biological characteristic information, and executing corresponding operation after the verification is passed. Specifically, the corresponding operations include: unlocking operations, payment operations, launching applications or sending files, etc.
The sensing method of the biometric information may be implemented by a hardware circuit structure, or may be implemented by a software code, for example, a string of instruction codes, and stored in a storage medium for being called by a processor to perform the sensing step of the biometric information.
Further, referring to fig. 6 and 7, fig. 6 shows a structure of a biometric information sensing apparatus according to an embodiment of the present invention, and fig. 7 shows a structure of a biometric information sensing apparatus according to another embodiment of the present invention. In this embodiment, the biometric information sensing apparatus 300 includes: a plurality of sensing units 310, and a controller 320. The controller 320 is configured to: when the sensing of the biological characteristic information is executed, the intensity of current environment light is obtained, when the intensity of the current environment light is larger than or equal to a preset first intensity threshold value, a light source required when the light sensing is executed is closed, and the plurality of sensing units are controlled to execute the light sensing. The sensing unit 310 is configured to: sensing of biometric information is performed on a target object approaching or touching the sensing device according to the control of the controller 320.
In some embodiments, the light source required for performing light sensing is a light source independent from the outside of the biometric information sensing apparatus 300, i.e., a light source on an electronic device to which the biometric information sensing apparatus 300 is applied. Of course, the light source may also be disposed on the biometric information sensing device 300, such as the light source 340 shown in fig. 7.
Taking the target object as a finger as an example, when the finger approaches or touches the sensing device, if the finger is illuminated by ambient light, and the finger has many tissue structures, such as epidermis, bone, flesh, blood vessels, etc., part of the light signal in the ambient light penetrates the finger, and part of the light signal is absorbed by the finger. The stronger the intensity of the ambient light, the stronger the intensity of the light signal penetrating the finger, and the inventors have found in their studies that, when the intensity of the ambient light reaches a certain level, a fingerprint image of the finger can be formed also based on sensing the ambient light penetrating the finger. The first intensity threshold is a critical value reaching a certain degree.
When a target object approaches or touches the sensing device 300, the sensing device 300 starts and starts to perform sensing of biometric information. Before the sensing device 300 starts to perform sensing of the biometric information, the intensity of the current ambient light is obtained, so that the light source 340 is controlled to be turned on or off according to the intensity of the current ambient light, so that the sensing device 300 performs sensing of the biometric information by using different light signals.
In the embodiment of the present invention, a specific value of the first intensity threshold is set in advance. When the intensity of the current ambient light is determined to be greater than or equal to the first intensity threshold, the light source is turned off, so that the sensing device 300 performs sensing of biometric information on the target object approaching or touching the sensing device 300 by using the ambient light. In particular, referring to fig. 3, when a finger approaches or touches the sensing device 300, the light source is turned off because the ambient light intensity exceeds the first intensity threshold. The sensing device 300 senses a light signal of the finger through which the ambient light penetrates, and forms a fingerprint image of the finger according to the sensing signal.
In some embodiments, the controller 320 is further configured to: when the intensity of the current ambient light is less than a preset first intensity threshold, the light source is controlled to be turned on, and the plurality of sensing units 310 are controlled to perform light sensing. When the intensity of the current ambient light is determined to be less than the first intensity threshold, the light source is turned on, so that the sensing device 300 performs sensing of the biometric information on the target object approaching or touching the sensing device 300 by using the light signal emitted by the light source. As shown in fig. 1, when a finger approaches or touches the sensing device, the light source emits a light signal to the finger, the light signal reflected by the surface of the finger is sensed by the sensing device 300, and a fingerprint image of the finger is formed according to the signal sensed by the sensing device 300.
In certain embodiments, the controller 320 is further configured to: when the sensing units are controlled to perform light sensing, the contact areas of the target objects are determined, and the sensing units corresponding to the contact areas are controlled to perform light sensing. Specifically, the sensing device comprises a plurality of sensing units, and the sensing device is applied to the biological characteristic recognition of a target object in a screen of the electronic equipment, when the sensing device is controlled to sense biological characteristic information, all the sensing units are scanned to drive the sensing units to perform light sensing one by one, and the biological characteristic information of the target object is formed according to sensing signals obtained by all the sensing units. Of course, since the contact area of the target object is smaller than the size of the display area, when the sensing device is controlled to sense the biometric information, the contact area of the target object may be determined first, and the sensing unit corresponding to the contact area may be controlled to sense the biometric information. Thus, not only is sensing of the biometric information of the target object achieved, but also all sensing units are prevented from operating, thereby reducing sensing power consumption and accelerating sensing speed.
Further, the controller 320 is configured to: according to the intensity of the current ambient light, the intensity of the optical signal emitted by the light source 340 is adjusted correspondingly. When sensing the biometric information by using the light signal of the light source, in order to avoid the influence of the ambient light penetrating through the finger on the sensing of the sensing device, in the embodiment of the present invention, the intensity of the light signal emitted by the light source 340 is correspondingly adjusted according to the intensity of the current ambient light. Specifically, the stronger the current ambient light, the greater the intensity of the light signal emitted by the light source 340; the weaker the current ambient light intensity, the less the intensity of the light signal emitted by the light source 340. When the ambient light is strong, the light signal penetrating through the finger is relatively strong, so that the intensity of the light signal emitted by the light source 340 is increased, the light signal reflected by the surface of the finger is relatively strong, and the influence caused by the ambient light can be reduced to a certain extent. When the ambient light is weak, the light signal penetrating through the finger is weak, so that the sensing of the biometric information is not affected basically, and therefore, the intensity of the light signal emitted by the light source 340 is weakened, the sensing of the biometric information can be realized, and the electric quantity is saved.
In some embodiments, the light source 340 may include a plurality of light emitting elements for emitting light of a single color, such as white light, blue light, green light, ultraviolet light, infrared light, and the like. Due to the selection of the light source, the sensing of the biological characteristic information can be realized, and the living body detection of the target object can also be realized, so that the safety of biological characteristic identification is improved.
Further, with continued reference to fig. 6, the biometric information sensing apparatus 300 further includes a substrate 301, and a plurality of sensing units 310 are disposed on the substrate 301. The substrate 301 may include both transparent substrates such as, but not limited to, glass substrates, plastic substrates, crystal, sapphire, etc., and non-transparent substrates such as, but not limited to, silicon substrates, metal substrates, circuit boards, etc. In addition, the substrate may be a rigid material or a flexible material, such as a flexible film. If the substrate is made of flexible material, the biological characteristic information sensing device not only becomes thinner, but also can be applied to electronic equipment with a curved display screen. Optionally, the light source 340 may also be disposed on the substrate 301 together with the sensing unit 310. For example, the light emitting element is disposed on a gap between adjacent sensing cells 310, or the light emitting element is disposed outside a sensing array formed by the sensing cells 310.
Further, the substrate 301 further includes a scan line group and a data line group electrically connected to the plurality of sensing units 310, wherein the scan line group includes a plurality of scan lines 302, the data line group includes a plurality of data lines 303, and the plurality of sensing units 310 are distributed in an array, for example, a matrix. Of course, other regular or irregular distributions are also possible. The scan lines 302 and the data lines 303 electrically connected to the sensing units 310 are disposed to cross each other and disposed between the adjacent sensing units 310. For example, a plurality of scan lines 302 are arranged at intervals along the Y direction, and each scan line 302 extends along the X direction; a plurality of data lines 303 are arranged at intervals in the X direction, and each data line 303 extends in the Y direction. Alternatively, the plurality of scan lines 302 and the plurality of data lines 303 are not limited to the vertical arrangement shown in fig. 6, and may be arranged at a certain angle, for example, 30 ° or 60 °. In addition, since the scan lines 302 and the data lines 303 have conductivity, the scan lines 302 and the data lines 303 at the crossing positions are isolated from each other by an insulating material.
It should be noted that the distribution and number of the scan lines 302 and the data lines 303 are not limited to the above-mentioned embodiments, and corresponding scan line groups and data line groups may be correspondingly arranged according to different structures of the sensing unit 310.
In some embodiments, the sensing unit 310 may include a switching device and a light sensing device, wherein the switching device is, for example, but not limited to, any one or more of a transistor, a MOS transistor, and a thin film transistor; such as, but not limited to, any one or more of a photodiode, a phototransistor, a photodiode, a photoresistor, a thin film transistor.
In the biometric information sensing apparatus 300, the controller 320 provides a driving signal through the scanning line to drive the sensing unit 310 to perform the optical sensing, so as to sense the biometric information of the target object approaching or touching the sensing apparatus.
Further, the biometric information sensing apparatus further includes a processing unit 330, and the processing unit 330 is configured to process the sensing signals output by the plurality of sensing units 310 and obtain biometric information of the target object.
Further, the processing unit 330 and the controller 320 may be selectively formed on the substrate or electrically connected to the sensing unit 310, for example, through a connector (e.g., a flexible circuit board) according to the type of the substrate. For example, when the substrate 301 is a silicon substrate, the processing unit 330 and the controller 320 may be selectively formed on the substrate 301, or may be selectively electrically connected to the sensing unit 310 through a flexible circuit board, for example; when the substrate is an insulating substrate, the processing unit 330 and the controller 320 need to be electrically connected to the sensing unit 310, for example, through a flexible circuit board.
In some embodiments, the sensing units 310, the controller 320 and the processing unit 330 are correspondingly integrated into different chips, for example, the sensing units 310 are integrated into one sensing chip, the controller 320 is integrated into one control chip, and the processing unit 330 is integrated into one processing chip. Of course, alternatively, the sensing units 310, the controller 320 and the processing unit 330 may also be integrated into a chip.
In some embodiments, the light source is packaged with the sensing chip, which makes assembly of the biometric information sensing device 300 easier. Of course, the light source may be provided independently or integrated with a plurality of sensing units 310 as shown in fig. 6.
Further, the biometric information sensing apparatus 300 further includes a light sensor for acquiring the current intensity of the ambient light when sensing of the biometric information is performed. The light sensor is independently disposed, and certainly, the function of the light sensor may also be implemented by the sensing unit 310, that is, when sensing the biometric information is performed by using the light sensing characteristics of the sensing unit 310, the controller 320 drives the predetermined light sensing device in the sensing unit 310 to operate, so that the sensing unit 310 senses the current ambient light, and obtains the intensity of the current ambient light according to the sensing signal. In the embodiment of the invention, the sensing unit 310 is used for sensing the intensity of the ambient light, so that the cost for additionally arranging the light sensor is saved.
In some embodiments, the controller 320 is further configured to: when sensing of the biological characteristic information is executed, an external light sensor is called to carry out photosensitive operation, and the intensity of current ambient light acquired by the external light sensor is received. In this embodiment, the biometric information sensing apparatus 300 is applicable to an electronic device provided with a light sensor, and the controller 320 has a calling interface, and when sensing of the biometric information is performed, the light sensing data of the light sensor of the electronic device is called through the calling interface, so as to obtain the intensity of the current ambient light according to the light sensing data. In the embodiment of the invention, the external light sensor is used for sensing the intensity of the ambient light, so that the cost for additionally arranging the light sensor is saved.
In some embodiments, the biometric information sensing device 300 includes any one or more of a fingerprint sensing device, a pulse sensing device, a blood oxygen sensing device, and a heartbeat sensing device.
In some embodiments, the biometric information sensing device 300 further comprises an encapsulating housing 350, wherein the encapsulating housing 350 is used for encapsulating the sensing unit 310 and the light source 340. Of course, the packaging housing 350 may also package the components of the controller 320 and the like together.
In some embodiments, the biometric information sensing apparatus 300 may be disposed in an electronic device to sense biometric information of a target object approaching or touching the biometric information sensing apparatus, and perform a corresponding operation on the electronic device after the biometric information of the target object is successfully verified.
Further, the electronic device is, for example, a consumer electronic product, a home-based electronic product, a vehicle-mounted electronic product, and a financial terminal product. The consumer electronic products are various electronic products applying biometric identification technology, such as mobile phones, tablet computers, notebook computers, desktop displays, all-in-one computers and the like. The household electronic products are various electronic products applying biological identification technology, such as intelligent door locks, televisions, refrigerators, wearable equipment and the like. The vehicle-mounted electronic product is a vehicle-mounted navigator, a vehicle-mounted DVD and the like. The financial terminal products are ATM machines, terminals for self-service business handling and the like.
Referring to fig. 8, fig. 8 shows a structure of an electronic device according to an embodiment of the present invention. The electronic device includes:
a light source 410 for emitting a light signal;
a light sensor 420 for acquiring the intensity of the current ambient light;
a biometric information sensing means 430 for performing a sensing operation for sensing biometric information of a target object approaching or touching the sensing means 430; and
the controller 440 is configured to control the light sensor 420 to obtain the intensity of the current ambient light when sensing of the biometric information is performed, turn off the light source when the intensity of the current ambient light is greater than or equal to a preset first intensity threshold, and control the biometric information sensing device 430 to perform a sensing operation.
The differences from the electronic device of the above embodiment are: in the electronic device according to the embodiment of the present invention, one or more of the light source 410, the controller 440, and the light sensor 420 are disposed independently of the biometric information sensing device 430. Specifically, the method comprises the following steps:
in some embodiments, the light source 410 may be a light source that is independently disposed from the electronic device and dedicated to sensing biometric information. Of course, the light source 410 may also be implemented by a display panel of the electronic device, since the light signal emitted when the display panel is lit can be used for sensing the biometric information. The display panel comprises a liquid crystal display screen and an OLED display screen.
In some embodiments, the biometric information sensing device 430 can be a sensing chip and is located below the display panel, so as to sense the biometric information of the target object above the display panel. Of course, the biometric information sensor 430 may also be a photosensitive panel attached to the display panel, and the photosensitive panel is located above or below the display panel. Referring to fig. 9 and 10, fig. 9 illustrates a structure in which the biometric information sensing device is positioned above the display panel, and fig. 10 illustrates a structure in which the biometric information sensing device is positioned below the display panel. As shown in fig. 9, the biometric information sensing device 430 is disposed above the display panel 450. Specifically, the biometric information sensing device 430 includes a plurality of sensing units 431, and the biometric information sensing device 430 includes a plurality of light-transmitting regions and a plurality of non-light-transmitting regions, and the sensing units 431 may be disposed in the light-transmitting regions or the non-light-transmitting regions according to structural characteristics. For example, if the sensing unit 431 is of a transparent structure, the sensing unit 431 may be disposed in a transparent region, and if the sensing unit 431 is of a non-transparent structure, the sensing unit 431 is disposed in a non-transparent region. The display panel 450 emits a corresponding light signal for display according to display requirements in a normal display mode; in other modes, corresponding light signals are emitted for sensing of biometric information according to the control of the controller 440. Since the display panel 450 is disposed below the biometric information sensing device 430, the display panel 450 has no particular structural limitation as long as it can emit an optical signal, such as a liquid crystal display or an OLED display. As shown in fig. 10, the biometric information sensing device 430 is disposed below the display panel 450, and specifically, the display panel 450 includes a plurality of light-transmitting regions, so that the light signal reflected by the target object passes through the light-transmitting regions to be sensed by the biometric information sensing device 430 disposed below the display panel 450. The biometric information sensing device 430 includes a plurality of sensing units 431 for sensing the light signals from above to form biometric information of the target object. Since the display panel 450 is located above the biometric information sensing device 430, the display panel may be a display structure with a light-transmitting property, such as an OLED display screen.
In some embodiments, the light sensor 420 may be a sensor provided independently for an electronic device, for example, an electronic device such as a current mobile phone, a palm computer, a tablet computer, or the like, which is provided with a corresponding light sensor. Referring to fig. 4, the electronic device is a mobile phone, the front of the mobile phone is a display screen, and the upper end of the mobile phone is provided with a front camera, a light sensor, a receiver and other components. In the embodiment of the invention, the front camera or the light sensor of the mobile phone can be used for acquiring the intensity of the current ambient light.
Of course, the light sensor 420 may also utilize the light sensing characteristics of the biometric information sensing device 430, so that the biometric information sensing device 430 senses the current ambient light before performing the sensing of the biometric information, and obtains the intensity of the current ambient light according to the sensing signal. By using the biometric information sensing device 430 to sense the intensity of the ambient light, the cost of additionally providing the light sensor 420 is saved.
Further, the biometric information sensing device 430 further includes a processing unit 432, and the processing unit 432 is configured to process the sensing signals output by the plurality of sensing units 431 and obtain the biometric information of the target object.
In some embodiments, the sensing unit 431 is further configured to act as a light sensor to obtain the intensity of the current ambient light.
In some embodiments, the biometric information sensing device 430 is integrated into one sensing chip, or the sensing unit 431 and the processing unit 432 of the biometric information sensing device 430 are integrated into at least two chips.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make variations, modifications, substitutions and alterations to the above embodiments within the scope of the present invention.
Claims (13)
1. A biometric information sensing device characterized by: comprises a plurality of sensing units and a controller; the controller is configured to: when sensing of biological characteristic information is executed, the intensity of current environment light is obtained, when the intensity of the current environment light is larger than or equal to a preset first intensity threshold value, a light source required when light sensing is executed is controlled to be closed, and the plurality of sensing units are controlled to execute light sensing so as to directly utilize the environment light to obtain the biological characteristic information; the sensing unit is used for: according to the control of the controller, sensing biological characteristic information of a target object which is in contact with or close to the sensing device is conducted, wherein when the intensity of the current environment light is smaller than the first intensity threshold value, the light source is controlled to be started, the plurality of sensing units are controlled to execute light sensing, the controller correspondingly adjusts the intensity of light signals sent by the light source according to the intensity of the current environment light, the intensity of the light signals sent by the light source is increased when the intensity of the current environment light is stronger, and the intensity of the light signals sent by the light source is reduced when the intensity of the current environment light is weaker.
2. The biometric information sensing device according to claim 1, wherein: the biometric information sensing device further comprises the light source.
3. The biometric information sensing apparatus according to claim 2, wherein: the light signal emitted by the light source comprises one or more of infrared light, ultraviolet light, white light, blue light and green light.
4. The biometric information sensing device according to claim 1, wherein: the controller is further configured to: when the sensing units are controlled to perform light sensing, the contact area of the target object is determined, and the sensing units corresponding to the contact area are controlled to perform light sensing.
5. The biometric information sensing device according to claim 1, wherein: the controller is further configured to: when sensing of biometric information is performed, a predetermined plurality of sensing units are controlled to perform light sensing to acquire the intensity of the current ambient light.
6. The biometric information sensing device according to claim 1, wherein: the biometric information sensing apparatus further includes: a light sensor for acquiring an intensity of the current ambient light when performing sensing of the biometric information.
7. The biometric information sensing apparatus according to claim 1, wherein: the controller is further configured to: when sensing of the biological characteristic information is executed, an external light sensor is called to carry out photosensitive operation, and the intensity of current ambient light acquired by the external light sensor is received.
8. The biometric information sensing device according to claim 1, wherein: the biometric information sensing apparatus further comprises: and the processing unit is used for processing the sensing signals output by the plurality of sensing units and obtaining the biological characteristic information of the target object.
9. The biometric information sensing apparatus according to claim 8, wherein: the sensing units are integrated on a sensing chip, the controller is integrated on a control chip, and the processing unit is integrated on a processing chip; or, the sensing units, the controller and the processing unit are integrated on one chip.
10. The biometric information sensing apparatus according to claim 9, wherein: the light source is provided independently, or the light source is integrated with the plurality of sensing units.
11. The biometric information sensing device according to claim 1, wherein: the biological characteristic information sensing device comprises any one or more of a fingerprint sensing device, a pulse sensing device, a blood oxygen sensing device and a heartbeat sensing device.
12. The biometric information sensing apparatus according to claim 1, wherein: the biometric information sensing apparatus further includes an encapsulation housing for encapsulating the sensing unit, the light source, and the controller.
13. An electronic device, characterized in that: comprising a biometric information sensing device as claimed in any one of claims 1 to 12.
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| WO2020087242A1 (en) * | 2018-10-30 | 2020-05-07 | 深圳市汇顶科技股份有限公司 | In-display optical fingerprint device and handheld device having optical fingerprint anti-counterfeiting sensing function |
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