CN109814763B - Touch screen, fingerprint identification and touch realization method and device - Google Patents
Touch screen, fingerprint identification and touch realization method and device Download PDFInfo
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- CN109814763B CN109814763B CN201910019243.2A CN201910019243A CN109814763B CN 109814763 B CN109814763 B CN 109814763B CN 201910019243 A CN201910019243 A CN 201910019243A CN 109814763 B CN109814763 B CN 109814763B
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Abstract
The invention relates to a touch screen, a method and a device for realizing fingerprint identification and touch control, wherein a touch electrode and a fingerprint identification electrode are arranged in an area corresponding to touch operation by detecting the touch operation on the touch screen; acquiring a first capacitance value corresponding to touch operation through a touch electrode and a fingerprint identification electrode; acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode; therefore, whether a touch request corresponding to touch operation is responded is judged according to the first capacitance value and the second capacitance value, so that fingerprint identification and touch functions are achieved through the touch electrode and the fingerprint identification electrode which are arranged in the area corresponding to the touch operation, optical and radio frequency type fingerprint unlocking elements are avoided, and the thickness of the terminal is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch screen, a fingerprint identification and touch control realization method and a device.
Background
With the development of touch technologies and display technologies, touch display devices are more and more pursued by people, and taking a common touch intelligent mobile terminal as an example, the design of higher screen occupation ratio brings more extreme visual experience than before to users, but while the screen occupation ratio of the intelligent mobile terminal is improved, the space reserved for fingerprint identification of security authentication for users is smaller and smaller.
In order to make the terminal reach higher screen and account for the ratio, some terminal manufacturers set up the fingerprint unblock at the fuselage back, will influence the terminal rear cover aesthetic measure with fingerprint unblock postposition, in order to solve to realize screen fingerprint identification, current screen fingerprint unblock has several kinds of schemes such as optical induction unblock, radio frequency formula.
In the conventional technology, the optical and radio frequency type fingerprint unlocking element needs to be provided with a receiving sensor below a corresponding position of a screen, but the problem of increasing the thickness of the terminal exists.
Disclosure of Invention
Therefore, it is necessary to provide a touch screen, a method and an apparatus for fingerprint identification and touch control, aiming at the technical problem of increasing the thickness of a terminal in the conventional optical and radio frequency type fingerprint unlocking.
A touch screen comprises a sensing component and a control chip; the sensing component is configured to detect the state of a touch screen and sense touch operation on the touch screen, and a touch electrode and a fingerprint identification electrode are arranged in an area corresponding to the touch operation on the sensing component; the control chip is electrically connected with the sensing component and configured to acquire a first capacitance value corresponding to the touch operation through the touch electrode and the fingerprint identification electrode; when the touch screen is detected to be in an unlocking state, a second capacitance value corresponding to the touch operation is obtained through the fingerprint identification electrode; and judging whether to respond to a touch control request corresponding to the touch operation according to the first capacitance value and the second capacitance value.
In one embodiment, the sensing component comprises a touch control film layer and at least one fingerprint identification area and a non-fingerprint identification area which are distributed on the touch control film layer; the non-fingerprint identification area is provided with a touch electrode, the fingerprint identification area is provided with a touch electrode and a fingerprint identification electrode, and the electrode density of the fingerprint identification area is greater than that of the non-fingerprint identification area.
In one embodiment, the touch screen further comprises a first chip and a second chip connected with the control chip; the touch electrode and the fingerprint identification electrode arranged in the fingerprint identification area are respectively connected with the first chip; the fingerprint identification electrode that the fingerprint identification district set up with the second chip is connected.
A fingerprint identification and touch implementation method comprises the following steps:
detecting the state of a touch screen and touch operation on the touch screen, wherein a touch electrode and a fingerprint identification electrode are arranged in an area corresponding to the touch operation;
acquiring a first capacitance value corresponding to the touch operation through the touch electrode and the fingerprint identification electrode;
when the touch screen is detected to be in an unlocking state, a second capacitance value corresponding to the touch operation is obtained through the fingerprint identification electrode;
and judging whether to respond to a touch control request corresponding to the touch operation according to the first capacitance value and the second capacitance value.
In one embodiment, the method further comprises:
when the touch screen is detected to be in a state to be unlocked, determining fingerprint information for sending the touch operation according to the first capacitance value;
and judging whether to respond to a fingerprint identification request corresponding to the touch operation or not according to the fingerprint information.
In one embodiment, the determining whether to respond to the fingerprint identification request corresponding to the touch operation according to the fingerprint information includes:
analyzing and processing the fingerprint information to obtain corresponding fingerprint line characteristics;
according to the obtained fingerprint grain characteristics, authenticating the identity corresponding to the fingerprint information;
and responding to the fingerprint identification request corresponding to the touch operation if the authentication is passed.
In one embodiment, the authenticating the identity corresponding to the fingerprint information according to the obtained fingerprint grain characteristics includes:
comparing the obtained fingerprint texture characteristics with pre-stored fingerprint samples;
and authenticating the identity corresponding to the fingerprint information according to the comparison result and the preset contact ratio.
In one embodiment, the determining whether to respond to the touch request corresponding to the touch operation according to the first capacitance value and the second capacitance value includes:
calculating a difference between the first and second capacitance values;
and if the difference value is larger than a preset threshold value, responding to a touch request corresponding to the touch operation.
An apparatus for implementing fingerprint identification and touch control, the apparatus comprising:
the touch screen comprises a detection module, a touch screen display module and a fingerprint identification module, wherein the detection module is used for detecting the state of the touch screen and the touch operation on the touch screen, and a touch electrode and a fingerprint identification electrode are arranged in an area corresponding to the touch operation;
the first acquisition module is used for acquiring a first capacitance value corresponding to the touch operation through the touch electrode and the fingerprint identification electrode;
the second acquisition module is used for acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode when the touch screen is detected to be in an unlocking state;
and the touch request judging module is used for judging whether to respond to the touch request corresponding to the touch operation according to the first capacitance value and the second capacitance value.
A touch screen comprising a touch detection component and a controller, the controller being electrically connected to the touch detection component, the controller comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, performing the method steps of any of the above embodiments.
According to the touch screen, the fingerprint identification and touch control realization method and the device, the touch operation generated on the touch screen is detected, and the touch control electrode and the fingerprint identification electrode are arranged in the area corresponding to the touch operation; acquiring a first capacitance value corresponding to touch operation through a touch electrode and a fingerprint identification electrode; acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode; therefore, whether a touch request corresponding to touch operation is responded is judged according to the first capacitance value and the second capacitance value, so that fingerprint identification and touch functions are achieved through the touch electrode and the fingerprint identification electrode which are arranged in the area corresponding to the touch operation, optical and radio frequency type fingerprint unlocking elements are avoided, and the thickness of the terminal is reduced.
Drawings
Fig. 1 is a schematic flowchart illustrating a method for implementing fingerprint identification and touch control in one embodiment;
FIG. 2 is a schematic flow chart illustrating a method for implementing fingerprint identification and touch control according to an embodiment;
FIG. 3 is a flowchart illustrating a method for fingerprint recognition and touch implementation according to an embodiment;
FIG. 4 is a flowchart illustrating the step S320 in the embodiment corresponding to FIG. 3;
FIG. 5 is a flowchart illustrating a method for fingerprint recognition and touch implementation according to an embodiment;
FIG. 6 is a block diagram of an apparatus for fingerprint recognition and touch implementation in one embodiment;
FIG. 7a is a block diagram of a touch screen in one embodiment;
FIG. 7b is a schematic diagram of a touch screen in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer" etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, when an element is referred to as being "formed on" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present.
As described in the background art, in the display terminal in the prior art, the fingerprint identification module is usually disposed in a non-display area of the display device, such as under a key of the non-display area or on the back of the display device, but the disposition on the back of the display device is inconvenient for a user, and the manner of disposing under the key limits the development of the full screen of the display device. In order to realize screen fingerprint identification, the current screen fingerprint unlocking has several schemes such as optical induction unlocking, radio frequency type and the like. The optical and radio frequency type fingerprint unlocking element needs to add a receiving sensor below the corresponding position of the screen, so that the thickness of the display terminal is increased. Based on the above, the application provides a method for realizing fingerprint identification and touch control, by detecting touch operation on a touch screen, a touch control electrode and a fingerprint identification electrode are arranged in an area corresponding to the touch operation; acquiring a first capacitance value corresponding to touch operation through a touch electrode and a fingerprint identification electrode; acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode; therefore, whether the touch control request corresponding to the touch operation is responded is judged according to the first capacitance value and the second capacitance value. The fingerprint identification and touch control functions are realized through the touch control electrode and the fingerprint identification electrode which are arranged in the area corresponding to the touch operation, optical and radio frequency type fingerprint unlocking elements are avoided, and the thickness of the terminal is reduced.
In an embodiment, referring to fig. 1, an embodiment of the present application provides a method for implementing fingerprint identification and touch control, including the following steps:
and S110, detecting touch operation on the touch screen.
And S120, acquiring a first capacitance value corresponding to the touch operation through the touch electrode and the fingerprint identification electrode.
S130, acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode.
And S140, judging whether a touch request corresponding to the touch operation is responded according to the first capacitance value and the second capacitance value.
And a touch electrode and a fingerprint identification electrode are arranged in the area corresponding to the touch operation. The touch control electrode includes many criss-cross touch control drive electrodes and many touch control response electrodes, and the fingerprint identification electrode includes many fingerprint identification drive electrodes and many fingerprint identification response electrodes of criss-cross. The touch electrode and the fingerprint identification electrode can be made of nano silver or transparent metal materials such as Indium Tin Oxide (ITO). When a finger or a conductor acts on the touch screen, capacitance variation is generated at the overlapping position of the touch driving electrode and the touch sensing electrode after the touch driving electrode on the touch screen receives a touch driving signal. After the fingerprint identification driving electrode on the touch screen receives a fingerprint identification driving signal, capacitance variation is generated at the overlapping position of the fingerprint identification driving electrode and the fingerprint identification sensing electrode. The touch request refers to the purpose of a user sending a touch operation to the touch screen, and the touch operation may be an opening action of an application program, a left-right sliding action of a display screen, a switching action of the display screen, a photographing action, a character inputting action, and the like.
Specifically, when a touch operation occurs on the touch screen, the touch operation occurring on the touch screen is detected. When a finger or a conductor acts on the touch screen, because the area corresponding to the touch operation is provided with the touch electrode and the fingerprint identification electrode, when the touch operation occurs in the area, the first capacitance value corresponding to the touch operation can be acquired through the touch electrode and the fingerprint identification electrode, and the second capacitance value corresponding to the touch operation is acquired through the fingerprint identification electrode. And comparing the first capacitance value with the second capacitance value, and judging whether to respond to the touch control request corresponding to the touch operation in the area according to the comparison result.
In the implementation, by detecting the touch operation on the touch screen, a touch electrode and a fingerprint identification electrode are arranged in an area corresponding to the touch operation; acquiring a first capacitance value corresponding to touch operation through a touch electrode and a fingerprint identification electrode; acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode; therefore, whether a touch request corresponding to touch operation is responded is judged according to the first capacitance value and the second capacitance value, so that the touch electrode and the fingerprint identification electrode which are arranged in the area corresponding to the touch operation have a touch identification function and a fingerprint identification function, and the purpose of integrating the fingerprint identification function on the touch screen is achieved. Optical and radio frequency fingerprint unlocking elements are avoided, and the thickness of the terminal is further reduced.
In one embodiment, referring to fig. 2, before detecting a touch operation occurring on the touch screen, the method further includes:
and S210, detecting the state of the touch screen.
Acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode, including:
and S220, when the touch screen is in an unlocking state, acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode.
The state of the touch screen includes an unlocked state, and the unlocking may be a way of enabling the terminal, a way of enabling an application program on the terminal, or a way of enabling a certain function of the application program. The unlocked state of the touch screen may be a state in which the terminal is available, a state in which an application on the terminal is available, or a state in which a function of the application is available. Specifically, the touch screen can detect the state of the touch screen in real time, judge whether the state of the touch screen is an unlocked state, and after judging that the touch screen is in the unlocked state, indicate that the touch operation occurring on the touch screen is not fingerprint identification but touch operation. Because the area that this touch operation corresponds is provided with touch-control electrode and fingerprint identification electrode, when the finger was used in on the touch-sensitive screen, produced the capacitance variation at the overlap department of fingerprint identification drive electrode and fingerprint identification response electrode, then obtained the second capacitance value that touch operation corresponds through the fingerprint identification electrode.
Further, determining whether to respond to a touch request corresponding to the touch operation according to the first capacitance value and the second capacitance value includes: calculating a difference between the first capacitance value and the second capacitance value; and if the difference value is larger than the preset threshold value, responding to a touch request corresponding to the touch operation.
Because the touch operation area is provided with the touch electrode and the fingerprint identification electrode, when the touch operation occurs in the area, the touch electrode and the fingerprint identification electrode can both generate capacitance values. When the state of the touch screen is the unlock state, when determining whether to respond to the touch request corresponding to the touch operation, the capacitance value generated by the fingerprint identification electrode in the touch operation area needs to be considered. Therefore, whether the touch control request corresponding to the touch operation is responded is judged according to the first capacitance value and the second capacitance value. Specifically, a difference between the first capacitance value and the second capacitance value is calculated, and the capacitance value generated by the fingerprint identification electrode is subtracted, where the difference between the first capacitance value and the second capacitance value may be used to determine whether to respond to the touch request corresponding to the touch operation. When the difference value between the first capacitance value and the second capacitance value is greater than the preset threshold value, the touch screen can execute a touch request corresponding to the touch operation.
In this embodiment, by detecting the state of the touch screen, according to the detected unlock state, the second capacitance value corresponding to the touch operation is obtained through the fingerprint identification electrode, and then the first capacitance value and the second capacitance value are determined whether to respond to the touch request corresponding to the touch operation, thereby implementing the touch function.
In an embodiment, referring to fig. 3, after the first capacitance value corresponding to the touch operation is obtained through the touch electrode and the fingerprint identification electrode, the method further includes the following steps:
and S310, when the touch screen is in a state to be unlocked, determining fingerprint information for sending out touch operation according to the first capacitance value.
And S320, judging whether a fingerprint identification request corresponding to the touch operation is responded or not according to the fingerprint information.
The state of the touch screen further comprises a state to be unlocked. The fingerprint information is information corresponding to the lines generated by the convex-concave unevenness on the skin on the front side of the tail end of the finger of a person. Since each person's fingerprint is different, the fingerprint information can be used for identification. The to-be-unlocked state of the touch screen can be an unusable state of the terminal, an unusable state of an application program on the terminal, or an unusable state of a certain function of the application program, and the to-be-unlocked state can be unlocked through fingerprint identification. The fingerprint identification request is a touch operation issued by a user in order to open a to-be-unlocked state of the touch screen.
Specifically, when touch operation occurs on the touch screen, a touch electrode and a fingerprint identification electrode are arranged in an area corresponding to the touch operation, and both the touch electrode and the fingerprint identification electrode in the area are used for a fingerprint identification function. After the touch driving electrode and the fingerprint identification driving electrode in the area receive driving signals, induction capacitors are generated at the overlapping positions of the touch driving electrode and the touch induction electrodes, and induction capacitors are also generated at the overlapping positions of the fingerprint identification driving electrode and the fingerprint identification induction electrodes, namely the touch electrodes and the fingerprint identification electrodes generate corresponding first capacitance values according to fingerprint concave-convex lines covered on the electrodes, and the fingerprint information of touch operation can be determined according to the first capacitance values. Therefore, whether the fingerprint identification request corresponding to the touch operation is responded is judged according to the fingerprint information.
In this embodiment, when the touch screen is in a to-be-unlocked state, both the touch electrode and the fingerprint identification electrode in the touch operation area are used for a fingerprint identification function, a first capacitance value corresponding to the touch operation is obtained through the touch electrode and the fingerprint identification electrode, and whether a fingerprint identification request corresponding to the touch operation is responded is determined according to the first capacitance value, so that the fingerprint identification function is realized.
In one embodiment, referring to fig. 4, determining whether to respond to a fingerprint identification request corresponding to a touch operation according to fingerprint information includes the following steps:
and S410, analyzing and processing the fingerprint information to obtain corresponding fingerprint texture characteristics.
And S420, authenticating the identity corresponding to the fingerprint information according to the obtained fingerprint grain characteristics.
And S430, responding to the fingerprint identification request corresponding to the touch operation if the authentication is passed.
Specifically, the ridge and valley of the fingerprint and the positions of the ridge and valley of the fingerprint are judged according to different capacitance values formed by fingerprint identification induction, different capacitance values are respectively formed at the positions of the ridge and the valley due to the ridge bulge of the fingerprint and the valley depression of the fingerprint, and based on the capacitance values, fingerprint information is analyzed and processed, the positions of the ridge and the valley are detected, and corresponding fingerprint line characteristics are obtained. And comparing the obtained fingerprint line characteristics with the line characteristics of the pre-stored fingerprint sample, and if the obtained fingerprint line characteristics and the line characteristics of the fingerprint sample have the contact ratio exceeding a certain ratio, determining that the identity corresponding to the fingerprint information passes the authentication. The degree of overlap exceeding a certain ratio may be a degree of overlap of 50% or more or a degree of overlap of other ratios, and the value of the degree of overlap may be set according to the actual situation. And if the identity corresponding to the fingerprint information passes the authentication, responding to a fingerprint identification request corresponding to the touch operation, and unlocking the current state to be unlocked.
In this embodiment, when the touch screen is in the to-be-unlocked state, the fingerprint information is analyzed to obtain the corresponding fingerprint texture characteristics, the identity corresponding to the fingerprint information is authenticated according to the obtained fingerprint texture characteristics, and if the authentication passes the unlocking of the current to-be-unlocked state, the fingerprint identification function is realized.
In an embodiment, referring to fig. 5, an embodiment of the present application provides a method for implementing fingerprint identification and touch control, including the following steps:
and S510, detecting the state of the touch screen, wherein the state of the touch screen comprises an unlocking state and a state to be unlocked.
S520, acquiring a first capacitance value corresponding to the touch operation through the touch electrode and the fingerprint identification electrode.
And S530, when the touch screen is in an unlocking state, acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode.
And S540, calculating the difference value between the first capacitance value and the second capacitance value.
And S550, responding to a touch request corresponding to the touch operation if the difference value is larger than the preset threshold value.
And S560, when the touch screen is in the state to be unlocked, determining fingerprint information for sending out touch operation according to the second capacitance value.
And S570, analyzing the fingerprint information to obtain corresponding fingerprint texture characteristics.
And S580, according to the obtained fingerprint grain characteristics, authenticating the identity corresponding to the fingerprint information.
And S590, responding to the fingerprint identification request corresponding to the touch operation if the authentication is passed.
It should be understood that although the various steps in the flow charts of fig. 1-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In an embodiment, referring to fig. 6, an embodiment of the present application provides a fingerprint identification and touch implementation apparatus 600, including:
the detecting module 610 is configured to detect a touch operation occurring on the touch screen, where a touch electrode and a fingerprint identification electrode are disposed in an area corresponding to the touch operation.
The first obtaining module 620 is configured to obtain a first capacitance value corresponding to a touch operation through the touch electrode and the fingerprint identification electrode.
The second obtaining module 630 is configured to obtain a second capacitance value corresponding to the touch operation through the fingerprint identification electrode.
The touch request determining module 640 is configured to determine whether to respond to a touch request corresponding to a touch operation according to the first capacitance value and the second capacitance value.
In one embodiment, the touch request determining module is further configured to calculate a difference between the first capacitance value and the second capacitance value; and if the difference value is larger than a preset threshold value, responding to a touch request corresponding to the touch operation.
In one embodiment, the fingerprint identification and touch implementation device further includes a state detection module configured to detect a state of the touch screen, where the state of the touch screen includes an unlocked state.
And the second acquisition module is further used for acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode when the touch screen is in an unlocked state.
In one embodiment, the state of the touch screen further includes a to-be-unlocked state. The device for realizing fingerprint identification and touch control further comprises a fingerprint information determining module and a fingerprint identification request judging module:
and the fingerprint information determining module is used for determining to send out the fingerprint information of the touch operation according to the first capacitance value when the touch screen is in a state to be unlocked.
And the fingerprint identification request judging module is used for judging whether to respond to the fingerprint identification request corresponding to the touch operation according to the fingerprint information.
For the specific limitations of the fingerprint identification and touch implementation apparatus, reference may be made to the above limitations of the fingerprint identification and touch implementation method, which is not described herein again. All modules in the fingerprint identification and touch realization device can be completely or partially realized through software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, the present application provides a touch screen comprising a touch detection component and a controller, the controller being electrically connected to the touch detection component, the controller comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the method steps of the above embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
In one embodiment, referring to fig. 7a, the present application provides a touch screen, which includes a sensing component 710 and a control chip 720. Wherein:
the sensing part 710 is configured to sense a touch operation occurring on the touch screen, and a touch electrode and a fingerprint recognition electrode are disposed in an area corresponding to the touch operation on the sensing part 710.
The control chip 720 is electrically connected with the sensing component 710 and configured to acquire a first capacitance value corresponding to a touch operation through the touch electrode and the fingerprint identification electrode; acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode; and judging whether to respond to the touch control request corresponding to the touch operation according to the first capacitance value and the second capacitance value.
In one embodiment, referring to fig. 7b, the sensing component 710 includes a touch-sensing film 720 and at least one fingerprint identification area 721 and a non-fingerprint identification area (not shown) distributed on the touch-sensing film 720; the area outside the fingerprint identification area 721 on the touch film layer is a non-fingerprint identification area. The non-fingerprint identification area 721 is provided with a touch electrode. The fingerprint identification area is provided with touch-control electrode and fingerprint identification electrode, and the touch-control electrode includes touch-control sensing electrode 741 and touch-control drive electrode 742, and the fingerprint identification electrode includes fingerprint identification sensing electrode 731 and fingerprint identification drive electrode 732. Since the accuracy required for the fingerprint recognition function is higher than that required for the touch function, the electrode density of the fingerprint recognition area 721 is greater than that of the non-fingerprint recognition area. The wiring of the fingerprint identification sensing electrode 731 and the fingerprint identification driving electrode 732 is tight, and the density of the formed cross grids is high, so that the fingerprint identification sensing electrode can be matched with the ridge rib (namely, the concave-convex grains of the fingerprint) of the fingerprint, and more accurate fingerprint information can be acquired.
In this embodiment, touch-control electrode and fingerprint identification electrode through setting up in the fingerprint identification district of touch-control rete have touch-control identification function and fingerprint identification function concurrently, have reached the purpose of fingerprint identification function integration on the touch-sensitive screen. Optical and radio frequency fingerprint unlocking elements are avoided, and the thickness of the terminal is further reduced.
In one embodiment, continuing to refer to fig. 7b, the touch screen further includes a first chip 750 and a second chip 760 connected to the control chip. The touch electrode and the fingerprint identification electrode arranged in the fingerprint identification area are respectively connected with the first chip 750; the fingerprint identification electrode arranged in the fingerprint identification area is connected with the second chip 760.
For specific limitations of the touch screen, reference may be made to the above limitations of the implementation method of fingerprint identification and touch control, and details are not repeated here.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A touch screen is characterized by comprising an induction component and a control chip;
the sensing component is configured to detect the state of a touch screen and sense touch operation on the touch screen, and a touch electrode and a fingerprint identification electrode are arranged in an area corresponding to the touch operation on the sensing component;
the control chip is electrically connected with the sensing component and configured to acquire a first capacitance value corresponding to the touch operation through the touch electrode and the fingerprint identification electrode; when the touch screen is detected to be in an unlocking state, a second capacitance value corresponding to the touch operation is obtained through the fingerprint identification electrode; calculating a difference between the first and second capacitance values; and if the difference value is larger than a preset threshold value, responding to the touch request corresponding to the touch operation.
2. The touch screen of claim 1, wherein the sensing component comprises a touch film layer and at least one fingerprint identification area and a non-fingerprint identification area distributed on the touch film layer;
the non-fingerprint identification area is provided with a touch electrode, the fingerprint identification area is provided with a touch electrode and a fingerprint identification electrode, and the electrode density of the fingerprint identification area is greater than that of the non-fingerprint identification area.
3. The touch screen of claim 2, further comprising a first chip and a second chip connected to the control chip;
the touch electrode and the fingerprint identification electrode arranged in the fingerprint identification area are respectively connected with the first chip;
the fingerprint identification electrode that the fingerprint identification district set up with the second chip is connected.
4. A fingerprint identification and touch control implementation method is characterized by comprising the following steps:
detecting the state of a touch screen and touch operation on the touch screen, wherein a touch electrode and a fingerprint identification electrode are arranged in an area corresponding to the touch operation;
acquiring a first capacitance value corresponding to the touch operation through the touch electrode and the fingerprint identification electrode;
when the touch screen is detected to be in an unlocking state, a second capacitance value corresponding to the touch operation is obtained through the fingerprint identification electrode;
calculating a difference between the first and second capacitance values; and if the difference value is larger than a preset threshold value, responding to the touch request corresponding to the touch operation.
5. The method of claim 4, further comprising:
when the touch screen is detected to be in a state to be unlocked, determining fingerprint information for sending the touch operation according to the first capacitance value;
and judging whether to respond to a fingerprint identification request corresponding to the touch operation or not according to the fingerprint information.
6. The method according to claim 5, wherein the determining whether to respond to the fingerprint identification request corresponding to the touch operation according to the fingerprint information includes:
analyzing and processing the fingerprint information to obtain corresponding fingerprint line characteristics;
according to the obtained fingerprint grain characteristics, authenticating the identity corresponding to the fingerprint information;
and responding to the fingerprint identification request corresponding to the touch operation if the authentication is passed.
7. The method according to claim 6, wherein the authenticating the identity corresponding to the fingerprint information according to the obtained fingerprint texture feature comprises:
comparing the obtained fingerprint texture characteristics with pre-stored fingerprint samples;
and authenticating the identity corresponding to the fingerprint information according to the comparison result and the preset contact ratio.
8. The method according to any one of claims 4 to 7, wherein the determining whether to respond to the touch request corresponding to the touch operation according to the first capacitance value and the second capacitance value includes:
calculating a difference between the first and second capacitance values;
and if the difference value is larger than a preset threshold value, responding to a touch request corresponding to the touch operation.
9. A fingerprint identification and touch implementation device, the device comprising:
the touch screen comprises a detection module, a touch screen display module and a fingerprint identification module, wherein the detection module is used for detecting the state of the touch screen and the touch operation on the touch screen, and a touch electrode and a fingerprint identification electrode are arranged in an area corresponding to the touch operation;
the first acquisition module is used for acquiring a first capacitance value corresponding to the touch operation through the touch electrode and the fingerprint identification electrode;
the second acquisition module is used for acquiring a second capacitance value corresponding to the touch operation through the fingerprint identification electrode when the touch screen is detected to be in an unlocking state;
the touch request judging module is used for calculating a difference value between the first capacitance value and the second capacitance value; and if the difference value is larger than a preset threshold value, responding to the touch request corresponding to the touch operation.
10. A touch screen comprising a touch detection component and a controller electrically connected to the touch detection component, the controller comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the computer program when executed by the processor implements the steps of the method of any one of claims 4 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910019243.2A CN109814763B (en) | 2019-01-09 | 2019-01-09 | Touch screen, fingerprint identification and touch realization method and device |
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| CN110427866B (en) * | 2019-07-29 | 2023-07-07 | 四川康佳智能终端科技有限公司 | Under-screen fingerprint unlocking control method, fingerprint unlocking equipment and storage medium |
| CN111241513A (en) * | 2020-01-09 | 2020-06-05 | 深圳传音控股股份有限公司 | Touch control method, terminal and storage medium |
| CN116704561A (en) * | 2022-12-30 | 2023-09-05 | 荣耀终端有限公司 | Touch screen, fingerprint identification method and electronic equipment |
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