CN108369472B - Electrode abnormity processing method and device, touch screen and electronic terminal - Google Patents

Electrode abnormity processing method and device, touch screen and electronic terminal Download PDF

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CN108369472B
CN108369472B CN201880000025.8A CN201880000025A CN108369472B CN 108369472 B CN108369472 B CN 108369472B CN 201880000025 A CN201880000025 A CN 201880000025A CN 108369472 B CN108369472 B CN 108369472B
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electrode
capacitance
normal
adjacent
open circuit
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CN108369472A (en
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毛栋良
康为
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Shenzhen Goodix Technology Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment

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Abstract

The embodiment of the invention provides an electrode exception handling method and device, a touch screen and an electronic terminal, wherein the electrode exception handling method comprises the following steps: determining that a target capacitance node of a touch screen operated by touch operation comprises an open circuit capacitance node corresponding to an open circuit electrode, wherein the open circuit electrode comprises an electrode which is open circuit in a capacitance sensor of the touch screen; determining a normal electrode adjacent to a broken electrode, and acquiring the capacitance value of a normal capacitance node adjacent to the broken capacitance node on the normal electrode; and performing capacitance compensation on the open circuit capacitance node according to the capacitance value of the normal capacitance node. According to the embodiment of the invention, the capacitance compensation can be effectively carried out on the corresponding capacitance node on the open circuit electrode, so that the faults of the touch screen such as point disconnection, line breakage, point elimination and the like caused by the open circuit of the electrode are avoided.

Description

Electrode abnormity processing method and device, touch screen and electronic terminal
Technical Field
The embodiment of the invention relates to the technical field of touch control, in particular to an electrode exception handling method and device for a touch screen, the touch screen and an electronic terminal.
Background
With the development of touch technology and terminal technology, more and more terminal devices adopt a touch mode to perform human-computer interaction. At present, a touch screen adopted by a terminal device mainly comprises a capacitive touch screen and a resistive touch screen, wherein the capacitive touch screen is favored by more and more users due to good definition, light transmittance and touch feeling of the capacitive touch screen.
The capacitive touch screen comprises a touch sensor and a touch controller, wherein the touch sensor comprises one or more capacitive sensors, each capacitive sensor comprises a driving electrode (TX electrode) and an induction electrode (RX electrode), the driving electrode and the induction electrodes are crossed to form a plurality of capacitive nodes, the driving electrode can send signals with different frequencies through setting, and the induction electrodes are responsible for receiving signals acting on the touch sensor. When a touch occurs, the capacitance value of the corresponding capacitance node changes, and the touch controller detects the change and then determines the corresponding touch position.
However, the driving electrodes and the sensing electrodes are formed by ITO (tin-doped indium oxide) wires, and some driving electrodes or sensing electrodes have broken electrodes due to poor contact caused by ITO process problems. When there is an electrode open circuit, the change in capacitance of the capacitance node corresponding to the open electrode cannot be detected. If the open circuit of the electrode is detected before the electrode leaves the factory, the fault product can be eliminated, so that the benign rate of the product is ensured. However, some driving electrodes or sensing electrodes are only slightly contacted and normally appear when leaving a factory, and after being utilized and installed in a complete machine, the driving electrodes or the sensing electrodes are completely disconnected in subsequent use due to long-time use, collision, air corrosion, expansion with heat and contraction with cold and the like, the electrodes are disconnected, so that the problems of point disconnection, line disconnection, point elimination and the like are caused, the product breaks down in subsequent use, and the use experience of a user is reduced.
Disclosure of Invention
The embodiment of the invention provides an electrode abnormity processing method and device, a touch screen and an electronic terminal, and aims to solve the problem that the conventional touch screen has an electrode open circuit in use after leaving a factory, so that the touch screen fails.
According to a first aspect of the embodiments of the present invention, there is provided an electrode exception handling method, including: determining that a target capacitance node of a touch screen operated by touch operation comprises an open circuit capacitance node corresponding to an open circuit electrode, wherein the open circuit electrode comprises an electrode which is open circuit in a capacitance sensor of the touch screen; determining a normal electrode adjacent to a broken electrode, and acquiring the capacitance value of a normal capacitance node adjacent to the broken capacitance node on the normal electrode; and performing capacitance compensation on the open circuit capacitor node according to the capacitance value of the normal capacitor node.
According to a second aspect of the embodiments of the present invention, there is also provided an electrode abnormality processing apparatus including: the touch screen comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining that a target capacitance node of the touch screen operated by touch operation comprises an open circuit capacitance node corresponding to an open circuit electrode, and the open circuit electrode comprises an electrode which is open circuit in a capacitance sensor of the touch screen; the acquisition module is used for determining a normal electrode adjacent to a broken electrode and acquiring the capacitance value of a normal capacitance node adjacent to the broken capacitance node on the normal electrode; and the compensation module is used for carrying out capacitance compensation on the open circuit capacitance node according to the capacitance value of the normal capacitance node.
According to a third aspect of the embodiments of the present invention, there is also provided a touch screen, including: the touch control device is electrically connected with the touch sensor; the touch sensor is used for acquiring capacitance values of capacitance nodes on the touch screen; the touch controller is configured to acquire a capacitance value acquired by the touch sensor, and execute an operation corresponding to the electrode abnormality processing method according to the acquired capacitance value.
According to a fourth aspect of the embodiments of the present invention, there is also provided an electronic terminal including the touch screen according to the third aspect.
According to the electrode abnormity processing scheme provided by the embodiment of the invention, when the touch screen is in electrode disconnection in use after being shipped from a factory, the capacitance node in the disconnected electrode related to the touch operation is subjected to capacitance compensation through the capacitance node on the normal electrode adjacent to the disconnected electrode. For touch operation, the touch position usually involves a plurality of adjacent electrodes, and the capacitance difference between corresponding capacitance nodes on the plurality of adjacent electrodes should be within a small range, so that the capacitance of the capacitance node on the normal electrode adjacent to the open circuit electrode can be used to effectively perform capacitance compensation on the corresponding capacitance node on the open circuit electrode, thereby avoiding touch screen faults such as disconnection, and extinction caused by electrode open circuit.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a flowchart illustrating steps of a method for processing an electrode exception according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps of a method for processing an electrode exception according to a second embodiment of the present invention;
FIG. 3 is a schematic illustration of the position of an open electrode in the embodiment of FIG. 2;
FIG. 4 is a schematic illustration of the position of another disconnect electrode in the embodiment of FIG. 2;
fig. 5 is a block diagram of an electrode abnormality processing apparatus according to a third embodiment of the present invention;
fig. 6 is a block diagram of an electrode abnormality processing apparatus according to a fourth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a touch screen according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the embodiments of the present invention.
Example one
Referring to fig. 1, a flowchart illustrating steps of a method for processing an electrode exception according to a first embodiment of the present invention is shown.
The electrode abnormality processing method of the embodiment includes the steps of:
step S102: and determining that the target capacitance node of the touch screen operated by the touch operation comprises an open circuit capacitance node corresponding to the open circuit electrode.
The open circuit electrode includes an electrode which is open circuit in a capacitive sensor of the touch screen, for example, a drive electrode and/or a sensing electrode which is open circuit.
As mentioned above, the capacitive touch screen is composed of a touch sensor and a touch controller, the touch sensor includes one or more capacitive sensors, each capacitive sensor includes a driving electrode and an induction electrode, and the driving electrode and the induction electrode intersect to form a plurality of capacitive nodes. After the touch screen is electrified every time, capacitance values of the capacitance nodes can be collected, and corresponding electrodes and/or capacitance nodes are detected according to the collected capacitance values, so that the abnormity of the electrodes and/or capacitance nodes, such as electrode open circuit and the like, can be detected.
If there is an open circuit electrode in the touch screen, when a touch operation touches a capacitance node on the open circuit electrode, corresponding capacitance compensation processing needs to be performed, that is, the electrode exception handling scheme provided by the embodiment of the present invention.
Specifically, in this step, after the touch operation on the touch screen is detected, if it is determined that the operation position of the touch operation relates to the position of the open circuit electrode, it may be determined that the target capacitance node of the touch screen operated by the touch operation includes the open circuit capacitance node corresponding to the open circuit electrode.
Step S104: and determining a normal electrode adjacent to the open circuit electrode, and acquiring the capacitance value of a normal capacitance node adjacent to the open circuit capacitance node on the determined normal electrode.
The normal electrode in the embodiment of the invention means an electrode which is not broken and can normally detect the capacitance value of the capacitance node.
And determining which normal capacitance nodes adjacent to the broken capacitance node are or what the position of the broken capacitance node is according to the position of the broken capacitance node. The capacitance node isThe driving electrodes and the sensing electrodes are crossed, and generally, all the driving electrodes are wired in one direction, such as a horizontal direction, and all the sensing electrodes are wired in one direction, such as a vertical direction. The capacitance node operated by a touch operation usually includes a plurality of capacitance nodes, and it is assumed that the capacitance node operated by a touch operation includes 9 capacitance nodes, which are respectively formed by intersecting the No. 2-4 driving electrodes and the No. 2-4 sensing electrodes, and are represented in a matrix form such as a matrix form for convenience of description
Figure BDA0001560562730000041
Wherein, C22、C32、C42The capacitor node is a capacitor node on the No. 2 induction electrode, C23、C33、C43The capacitor node is a capacitor node on the No. 3 induction electrode, C24、C34、C44The No. capacitance node is a capacitance node on the No. 4 induction electrode; c22、C23、C24The capacitor node is the capacitor node on the No. 2 driving electrode, C32、C33、C34The capacitor node is the capacitor node on the No. 3 driving electrode, C42、C43、C44The No. capacitance node is the capacitance node on the No. 4 driving electrode. Take the case of the open circuit of No. 3 sensing electrode, wherein C23、C33、C43The first capacitor node is a broken capacitor node. The normal electrodes adjacent to the No. 3 sensing electrode are No. 2 sensing electrode and No. 4 sensing electrode, correspondingly, C23The normal capacitance node adjacent to the No. 2 capacitance node is C on the No. 2 induction electrode22C on No. 4 capacitance node and No. 4 induction electrode24And a signal capacitor node. Similarly, like C33The normal capacitance node adjacent to the No. 2 capacitance node is C on the No. 2 induction electrode32C on No. 4 capacitance node and No. 4 induction electrode34A signal capacitor node; and C43The normal capacitance node adjacent to the No. 2 capacitance node is C on the No. 2 induction electrode42C on No. 4 capacitance node and No. 4 induction electrode44And a signal capacitor node. The capacitance values of these normal capacitive nodes can be used as a reference for capacitance compensation of the open capacitive node.
Step S106: and carrying out capacitance compensation on the open-circuit capacitance node according to the capacitance value of the normal capacitance node.
For a touch operation, the touch position usually involves a plurality of adjacent electrodes, and the capacitance difference between the corresponding capacitance nodes on the plurality of adjacent electrodes should be within a small range, so that the capacitance of the capacitance node on the normal electrode adjacent to the open circuit electrode can be effectively used to perform capacitance compensation on the corresponding capacitance node on the open circuit electrode. That is, the capacitance value of the normal capacitance node is used as a reference, and an appropriate capacitance value is set for the open capacitance node.
According to the embodiment, when the touch screen is in an electrode open circuit in use after being shipped from a factory, the capacitance node in the open circuit electrode related to the touch operation is subjected to capacitance compensation through the capacitance node on the normal electrode adjacent to the open circuit electrode. For touch operation, the touch position usually involves a plurality of adjacent electrodes, and the capacitance difference between corresponding capacitance nodes on the plurality of adjacent electrodes should be within a small range, so that the capacitance of the capacitance node on the normal electrode adjacent to the open circuit electrode can be used to effectively perform capacitance compensation on the corresponding capacitance node on the open circuit electrode, thereby avoiding touch screen faults such as disconnection, and extinction caused by electrode open circuit.
Example two
Referring to fig. 2, a flowchart illustrating steps of a method for processing an electrode exception according to a second embodiment of the present invention is shown.
The electrode abnormality processing method of the embodiment includes the steps of:
step S202: the open circuit electrode is determined.
When the open circuit electrode is determined, in a feasible mode, after the touch screen is powered on and before a stable reference value of the touch screen is established, the capacitance value of a certain frame of the touch screen can be acquired; determining the maximum capacitance value in a plurality of capacitance nodes corresponding to each electrode from the acquired capacitance values of the frame; and if the maximum capacitance value is smaller than the set capacitance value, determining the corresponding electrode as an open circuit electrode. The set capacitance value can be set by those skilled in the art as appropriate according to actual conditions, such as arbitrarily set within the range of 256-768, and optionally set to 512.
And after the stable reference value is determined, when whether the touch screen is touched in a certain frame is judged, comparing the capacitance value of the capacitance node of the frame with the stable reference value, so that whether the touch screen is touched can be detected and judged.
For example, before the stable reference value is established, capacitance values of capacitance nodes are collected for a certain frame of the touch screen, then the maximum value, namely the maximum capacitance value, of the capacitance values of all capacitance nodes of each driving electrode and each sensing electrode is respectively checked, and if the maximum capacitance value is smaller than 512, it is considered that the electrode is open-circuited and needs to be processed. The electrodes with the open circuit may be sensing electrodes, driving electrodes, both sensing electrodes and driving electrodes.
In one power-on use of the touch screen, the open circuit electrode is determined and then used in the subsequent process until the next power-on detection. That is, the touch screen determines the open electrode once each time it is powered up for use.
Step S204: and determining a stable reference value of the touch screen.
In this embodiment, the determination of the stable reference value may be implemented by any appropriate conventional means according to actual needs by those skilled in the art, and the embodiment of the present invention is not limited thereto.
Step S206: and determining that the target capacitance node of the touch screen operated by the touch operation comprises a broken capacitance node.
Wherein, the breaking electrode comprises a driving electrode and/or a sensing electrode which is broken. Each electrode has a plurality of capacitance nodes, and when the electrode is broken, the corresponding capacitance nodes become broken capacitance nodes, and one touch operation may involve one or more broken capacitance nodes. That is, the open capacitive node means all capacitive nodes on the open electrode, and in one touch operation, the open capacitive node involved in the touch operation is the open capacitive node involved in the touch position.
Step S208: the normal electrode adjacent to the open circuit electrode is determined.
In the embodiment of the invention, the normal electrode adjacent to the drive electrode with the broken circuit is still the drive electrode, and the normal electrode adjacent to the induction electrode with the broken circuit is still the induction electrode. Therefore, in this step, the normal driving electrode adjacent to the driving electrode where the disconnection occurs and/or the normal sensing electrode adjacent to the sensing electrode where the disconnection occurs can be determined.
In one possible approach, the normal electrode adjacent to the electrode where the disconnection occurred can be determined based on the location of the electrode where the disconnection occurred.
For example, if the electrode with the open circuit is a driving electrode and there is an adjacent normal driving electrode on only one side of the driving electrode, at least two normal driving electrodes sequentially connected from the first normal driving electrode adjacent to the driving electrode are determined as the normal driving electrodes adjacent to the driving electrode with the open circuit. In this case, the open-circuit driving electrode is located at the edge of the capacitive sensor, and the capacitance values of the corresponding capacitive nodes on the at least two normal driving electrodes are used as references, so that the capacitance compensation of the open-circuit capacitive node can be more accurate. It is of course within the scope of the inventive idea to use only one adjacent normal electrode on one side as a reference. For example, the open circuit driving electrode is the driving electrode No. 1 at the edge of the capacitive sensor, and the normal driving electrodes No. 2 and No. 3 adjacent thereto can be used as reference. An open circuit driving electrode at the edge of a capacitive sensor is shown in fig. 3, the driving electrode is horizontally arranged, and the sensing electrode is vertically arranged. As can be seen in FIG. 3, the drive electrode No. 00 at the edge of the capacitive sensor is open circuited, with only one side adjacent to the drive electrode No. 01.
For another example, if the electrode in which the disconnection occurs is a driving electrode and there are adjacent normal driving electrodes on both sides of the driving electrode, for each of both sides of the driving electrode, starting from the first normal driving electrode adjacent to the driving electrode, at least one normal driving electrode is determined as the normal driving electrode adjacent to the driving electrode in which the disconnection occurs. In this case, the open circuit driving electrode is located in the middle of the capacitance sensor, normal driving electrodes are adjacent to both sides of the open circuit driving electrode, one or more adjacent normal driving electrodes are taken as reference for each side, and capacitance values of corresponding capacitance nodes on at least two normal driving electrodes are used as reference, so that capacitance compensation of the open circuit capacitance node can be more accurate. For example, the open circuit driving electrode is the driving electrode No. 3, and the adjacent normal driving electrodes at two sides are the driving electrode No. 2 and the driving electrode No. 4, respectively, and the driving electrodes No. 2 and No. 4 are used as reference.
For another example, if the electrode with the open circuit is an inductive electrode and there is an adjacent normal inductive electrode on only one side of the inductive electrode, at least two normal inductive electrodes sequentially connected are determined as the normal inductive electrodes adjacent to the inductive electrode with the open circuit, starting from the first normal inductive electrode adjacent to the inductive electrode. In this case, the open circuit sensing electrode is located at the edge of the capacitive sensor, and the capacitance value of the corresponding capacitive node on the at least two normal sensing electrodes is used as a reference, so that the capacitance compensation of the open circuit capacitive node can be more accurate.
For another example, if the electrode with the open circuit is an induction electrode and there are adjacent normal induction electrodes on both sides of the induction electrode, for each of both sides of the induction electrode, starting from the first normal induction electrode adjacent to the induction electrode, at least one normal induction electrode is determined as the normal induction electrode adjacent to the induction electrode with the open circuit. In this case, the open circuit sensing electrode is located in the middle of the capacitance sensor, normal sensing electrodes are adjacent to both sides of the open circuit sensing electrode, one or more adjacent normal sensing electrodes are taken as reference for each side, and capacitance values of corresponding capacitance nodes on at least two normal sensing electrodes are used as reference, so that capacitance compensation of the open circuit capacitance node can be more accurate. An open circuit sensing electrode located in the middle of a capacitive sensor is shown in fig. 4, in which the driving electrode is horizontally arranged and the sensing electrode is vertically arranged in fig. 4. As can be seen from fig. 4, the sensing electrode No. 01 located in the middle of the capacitive sensor is broken, and one side of the broken electrode is adjacent to the sensing electrode No. 00, and the other side of the broken electrode is adjacent to the sensing electrode No. 02.
Alternatively, the normal driving electrode adjacent to the driving electrode where the disconnection occurs is determined as two normal driving electrodes; and/or the determined normal sensing electrode adjacent to the sensing electrode with the disconnection is two normal sensing electrodes. By adopting the mode of two adjacent normal electrodes, the data calculation amount can be reduced, and the capacitance compensation efficiency is improved. It will be apparent to those skilled in the art that in actual use, a greater number of normal electrodes than two may be selected as desired.
Step S210: and acquiring the capacitance value of the normal capacitance node adjacent to the open circuit capacitance node on the determined normal electrode.
The method comprises the following steps: and acquiring the capacitance value of the normal capacitance node adjacent to the open-circuit capacitance node on the determined normal driving electrode, and/or acquiring the capacitance value of the normal capacitance node adjacent to the open-circuit capacitance node on the determined normal sensing electrode.
As described in the example of the first embodiment, for each open-circuit capacitive node, a corresponding normal capacitive node is corresponding to the open-circuit capacitive node, for example, a capacitive node on one open-circuit sensing electrode, and two sides of the horizontal direction of the open-circuit capacitive node are corresponding to the capacitive nodes on the corresponding normal sensing electrodes.
In this embodiment, the capacitance value of the normal capacitance node may be a difference between the stable reference value of the normal capacitance node and the current capacitance value. The touch screen judges whether the capacitance node is touched according to the difference value between the stable reference value of the capacitance node and the current capacitance value, and the touch position can be directly determined according to the result of capacitance compensation by taking the difference value as the basis for capacitance compensation, so that the capacitance compensation and touch detection efficiency is improved. But not limited thereto, in practical applications, the capacitance value of the normal capacitance node may also be a stable reference value or a current capacitance value. When the capacitance value is a stable reference value or the current capacitance value, after capacitance compensation is carried out on the open circuit capacitance node, corresponding processing is carried out, and then touch detection of the open circuit capacitance node can be achieved.
Step S212: and carrying out capacitance compensation on the open-circuit capacitance node according to the capacitance value of the normal capacitance node.
In a feasible manner, when the difference between the stable reference value of the normal capacitance node and the current capacitance value is used as the capacitance value of the normal capacitance node, capacitance compensation can be performed on the current open-circuit capacitance node according to the relationship between the maximum capacitance value and the minimum capacitance value of the adjacent normal capacitance node for each open-circuit capacitance node. For example, the capacitance compensation can be performed on the currently open capacitor node according to the ratio between the maximum capacitance value and the minimum capacitance value of the adjacent normal capacitor nodes. Because the maximum capacitance value and the minimum capacitance value are the difference between the stable reference value and the current capacitance value, the touch position can be accurately judged according to the ratio of the maximum capacitance value to the minimum capacitance value, and more accurate reference is provided for capacitance compensation. The smaller the ratio, the more consistent the states of the adjacent normal capacitive nodes (e.g., both touched or both untouched); the larger the ratio, the more inconsistent the state of the adjacent normal capacitive nodes (e.g., one side is touched and one side is not touched).
Further optionally, it may be determined whether a ratio between the maximum capacitance value and the minimum capacitance value is greater than a set threshold; if not, performing capacitance compensation on the current open circuit capacitance node according to the ratio; and if the ratio is larger than the preset threshold, setting the ratio as the preset threshold, and performing capacitance compensation on the current open circuit capacitance node according to the set ratio. The setting threshold may be set by a person skilled in the art as appropriate according to actual conditions, and the embodiment of the present invention is not limited thereto. For example, 3-5, and optionally 4, may be provided. If the ratio is larger than the set threshold, the state difference of the adjacent normal capacitance nodes is larger, and the ratio is set as the set threshold, so that the subsequent capacitance compensation processing is simplified, and the capacitance compensation processing efficiency is improved.
As mentioned above, the disconnection electrode may be located at an edge position of the capacitive sensor or may be located at a middle position of the capacitive sensor.
For the case that the open circuit electrode is located at the edge of the capacitive sensor, that is, if only one side of the open circuit electrode has an adjacent normal electrode, the capacitance compensation can be performed on the current open circuit capacitance node according to the ratio and the maximum capacitance value. That is, the maximum capacitance value of the normal capacitance node adjacent to the open capacitance node on the normal electrode is determined from at least two normal electrodes adjacent to the open electrode, and the capacitance compensation of the open capacitance node is performed with reference to the maximum capacitance value and the ratio. For example, a second compensation value is calculated according to the ratio and the maximum capacitance value; and taking the second compensation value as the capacitance value of the current open circuit capacitance node. Specifically, according to the ratio, the maximum capacitance value is processed by using a corresponding coefficient or a proper algorithm, and the processed result is used as the capacitance value of the open-circuit capacitor node.
And for the condition that the open circuit electrode is positioned in the middle of the capacitance sensor, namely, if the two sides of the electrode with the open circuit are provided with the adjacent normal electrodes, capacitance compensation is carried out on the current open circuit capacitance node according to the ratio, the maximum capacitance value and the minimum capacitance value. Under the condition that normal electrodes exist on two sides, the positions of the normal electrodes on the two sides are close to those of the open circuit electrodes, and the capacitance values of the adjacent normal capacitance nodes need to be comprehensively considered by the open circuit capacitance nodes, so that capacitance compensation is more accurate and objective. For example, a first compensation value is calculated according to the ratio, the maximum capacitance value and the minimum capacitance value; and taking the first compensation value as the capacitance value of the current open circuit capacitance node. Specifically, different coefficients are set for the maximum capacitance value and the minimum capacitance value respectively according to the ratio, the maximum capacitance value and the minimum capacitance value are processed according to the set coefficients and a proper algorithm, and the processed result is used as the capacitance value of the open circuit capacitor node.
Hereinafter, the above-described process will be described by specific examples.
Open circuit electrode (one) is located at the edge of the capacitive sensor (only one normal electrode is located beside)
In this example, the determination of the open circuit electrode is as described in step S202, and in addition, in this embodiment, the difference value between the stable reference value of the normal capacitance node and the current capacitance value is used as the capacitance value of the normal capacitance node. Based on the above arrangement, the following operations are performed for each open capacitance node:
the first step is as follows: determining an open capacitance node to be processed.
In this step, the open-circuit capacitance node to be processed is the open-circuit capacitance node related to the touch position.
The second step is that: the difference of the normal capacitance node corresponding to the open capacitance node on the normal electrode next to the open electrode is obtained as a1, and the difference of the normal capacitance node corresponding to the open capacitance node on the normal electrode next to the open electrode is obtained as a 2.
In this example, the difference is a difference between the stable reference value of the capacitance node and the current capacitance value.
For example, if the capacitance node No. 01 of the drive electrode No. 00 in fig. 3 (i.e., the open capacitance node) is processed, the difference between the capacitance node No. 01 of the drive electrode No. 01 and the difference between the capacitance node No. 01 of the drive electrode No. 02 are obtained.
The third step: determining the greater of a1 and a2, and if a1> a2, performing the fourth step; if A1< A2, then the fifth step is executed.
The fourth step: calculating Ratio _ real as a1/a2, determining whether Ratio _ real is greater than 4, if so, setting (e.g., reassigning) Ratio _ real as 4, and performing capacitance compensation on the open-circuit capacitor node through a formula [ a1+ a1 (Ratio _ real/4) ], namely taking the formula result as a compensation value (difference between a stable reference value and the current capacitance value) of the open-circuit capacitor node; if not, the Ratio _ real is calculated according to the Ratio _ real-A1/A2, and then capacitance compensation is carried out on the broken capacitance node directly through a formula [ A1+ A1 (Ratio _ real/4) ]. Where the constant 4 is set to limit the maximum value of Ratio _ real to 4.
The fifth step: calculating Ratio _ real as a2/a1, determining whether Ratio _ real is greater than 4, if so, setting (e.g., reassigning) Ratio _ real as 4, and performing capacitance compensation on the open capacitor node through a formula a2 (5-Ratio _ real)/4; if not, the Ratio _ real is calculated according to the Ratio _ real-a 2/a1, and then capacitance compensation is performed on the open capacitance node directly through formula a2 (5-Ratio _ real)/4, that is, the formula result is used as a compensation value (difference between the stable reference value and the current capacitance value) of the open capacitance node. Where the setting of constant 4 corresponds to maximum 4 of Ratio _ real, the setting of constant 5 corresponds to maximum 5 of the possible ranges 3-5 of Ratio _ set, which is the possible range of ratios set.
In the above process, each specific numerical value is an exemplary one, and in a specific application, a person skilled in the art may make appropriate modifications and uses with reference to the description of the embodiment of the present invention.
The second broken electrode is positioned in the middle of the capacitance sensor (namely, the left and right sides of the broken electrode are provided with normal electrodes or the upper and lower sides of the broken electrode are provided with normal electrodes)
In this example, the determination of the open circuit electrode is as described in step S202, and in this embodiment, the open circuit electrode is taken as the sensing electrode, and the left side and the right side thereof have the normal electrodes, for example, and the difference between the stable reference value of the normal capacitance node and the current capacitance value is taken as the capacitance value of the normal capacitance node. Based on the above arrangement, the following operations are performed for each open capacitance node:
the first step is as follows: determining an open capacitance node to be processed.
In this step, the open-circuit capacitance node to be processed is the open-circuit capacitance node related to the touch position.
And secondly, respectively acquiring the difference of the normal capacitance nodes corresponding to the open circuit capacitance nodes on the normal electrodes on the left side and the right side of the open circuit electrode, wherein the difference on the left side is A1, and the difference on the right side is A2.
In this example, the difference is a difference between the stable reference value of the capacitance node and the current capacitance value. And on the normal induction electrodes at the left side and the right side of the induction electrode with the open circuit, the capacitor node which is at the same horizontal position with the capacitor node with the open circuit is a normal capacitor node corresponding to the capacitor node with the open circuit.
For example, if the capacitance node 01 of the sensing electrode 01 in fig. 4 (i.e., the open capacitance node) is processed, the difference between the capacitance node 01 of the driving electrode 00 and the capacitance node 01 of the driving electrode 02 is obtained.
The third step: the larger and smaller of a1 and a2 were determined.
That is, the larger value is Max (a1, a2), and the minimum value Min (a1, a 2).
The fourth step: calculating Ratio _ real ═ Max/Min, judging whether Ratio _ real is greater than 4, if so, setting (for example, reassigning) Ratio _ real to 4, and performing capacitance compensation on the open-circuit capacitor node through a formula [ (3+ Ratio _ real) × Max + (5-Ratio _ real) × Min ]/8, namely using a formula result as a compensation value (a difference value between a stable reference value and the current capacitance value) of the open-circuit capacitor node; if the value is not larger than the preset value, calculating the Ratio _ real according to the Ratio _ real ═ Max/Min, and directly performing capacitance compensation on the open-circuit capacitor node through a formula [ (3+ Ratio _ real) × Max + (5-Ratio _ real) × Min ]/8, namely taking the formula result as a compensation value (the difference value between the stable reference value and the current capacitance value) of the open-circuit capacitor node. Wherein the settings of constants 3 and 5 correspond to the minimum 3 and maximum 5 values, respectively, of the possible ranges 3-5 of Ratio _ set (Ratio _ set being a possible range of the set Ratio); the setting of the constant 8 corresponds to the maximum value 4 of Ratio _ real, and since the normal electrodes on both sides are considered together, 2 times of 4 is taken as 8.
In the above process, each specific numerical value is an exemplary one, and in a specific application, a person skilled in the art may make appropriate modifications and uses with reference to the description of the embodiment of the present invention. In addition, the above embodiments are described by taking two adjacent normal electrodes as an example, and when more normal electrodes are used, the formula and parameters may be adjusted and used by referring to the principles of the above embodiments.
In addition, if at least two adjacent disconnection electrodes exist at the same time, the at least two disconnection electrodes as a whole can be processed by determining their positions in the capacitive sensor. If a plurality of open circuit electrodes exist simultaneously but the open circuit electrodes are not adjacent, for example, two non-adjacent driving electrodes or two non-adjacent sensing electrodes exist simultaneously, the scheme provided by the embodiment of the invention is respectively adopted for each driving electrode or each sensing electrode to process. Similarly, if there are open-circuited driving electrodes and open-circuited sensing electrodes, the open-circuited driving electrodes and the open-circuited sensing electrodes may be processed separately according to the scheme provided by the embodiment of the present invention.
According to the embodiment, the touch screen performance of the open circuit electrode is obviously improved through open circuit electrode identification and capacitance compensation processing; the touch position can be better identified through the ratio of the maximum value to the minimum value of the corresponding normal capacitance node on the normal electrode adjacent to the broken electrode, the capacitance of the broken capacitance node close to the real capacitance is fitted, the performance of the touch screen and capacitance compensation is improved, and the touch screen fault is avoided.
EXAMPLE III
Referring to fig. 5, a block diagram of an electrode abnormality processing apparatus according to a third embodiment of the present invention is shown.
The electrode abnormality processing apparatus of the present embodiment includes: a determining module 302, configured to determine that a target capacitance node of a touch screen operated by a touch operation includes an open capacitance node corresponding to an open circuit electrode, where the open circuit electrode includes an electrode that is open circuit in a capacitance sensor of the touch screen; an obtaining module 304, configured to determine a normal electrode adjacent to the open circuit electrode, and obtain a capacitance value of a normal capacitance node adjacent to the open circuit capacitance node on the determined normal electrode; and the compensation module 306 is configured to perform capacitance compensation on the open-circuit capacitor node according to the capacitance value of the normal capacitor node.
According to the embodiment, when the touch screen is in an electrode open circuit in the use after the touch screen is shipped, the capacitance node in the open circuit electrode related to the touch operation is subjected to capacitance compensation through the capacitance node on the normal electrode adjacent to the open circuit electrode. For touch operation, the touch position usually involves a plurality of adjacent electrodes, and the capacitance difference between corresponding capacitance nodes on the plurality of adjacent electrodes should be within a small range, so that the capacitance of the capacitance node on the normal electrode adjacent to the open circuit electrode can be used to effectively perform capacitance compensation on the corresponding capacitance node on the open circuit electrode, thereby avoiding touch screen faults such as disconnection, and extinction caused by electrode open circuit.
Example four
Referring to fig. 6, a block diagram of an electrode abnormality processing apparatus according to a fourth embodiment of the present invention is shown.
The electrode abnormality processing apparatus of the present embodiment includes: a determining module 402, configured to determine that a target capacitance node of a touch screen operated by a touch operation includes an open capacitance node corresponding to an open pole, where an open electrode includes an electrode in a capacitive sensor of the touch screen that is open; an obtaining module 404, configured to determine a normal electrode adjacent to the open circuit electrode, and obtain a capacitance value of a normal capacitance node adjacent to the open circuit capacitance node on the determined normal electrode; and a compensation module 406, configured to perform capacitance compensation on the open-circuit capacitor node according to the capacitance value of the normal capacitor node.
Optionally, the obtaining module 404 is configured to determine a normal driving electrode adjacent to the driving electrode where the open circuit occurs, and/or a normal sensing electrode adjacent to the sensing electrode where the open circuit occurs; and acquiring the capacitance value of the normal capacitance node adjacent to the open-circuit capacitance node on the determined normal driving electrode, and/or acquiring the capacitance value of the normal capacitance node adjacent to the open-circuit capacitance node on the determined normal sensing electrode.
Optionally, the obtaining module 404 includes: a normal electrode determination module 4042 for determining a normal electrode adjacent to the electrode where the disconnection occurs, based on the position of the electrode where the disconnection occurs; a capacitance value obtaining module 4044, configured to obtain the determined capacitance value of the normal capacitance node on the normal electrode adjacent to the open capacitance node.
Optionally, the normal electrode determination module 4042 includes:
a first determining module 40422, configured to: if the electrode with the broken circuit is a driving electrode and only one side of the driving electrode has an adjacent normal driving electrode, determining at least two normal driving electrodes which are sequentially connected as the normal driving electrodes adjacent to the driving electrode with the broken circuit from a first normal driving electrode adjacent to the driving electrode;
a second determining module 40424, configured to: if the electrode with the broken circuit is a driving electrode and two sides of the driving electrode are provided with adjacent normal driving electrodes, determining at least one normal driving electrode as a normal driving electrode adjacent to the driving electrode with respect to each of the two sides of the driving electrode, starting from a first normal driving electrode adjacent to the driving electrode;
a third determining module 40426, configured to:
if the electrode with the broken circuit is an induction electrode and only one side of the induction electrode has an adjacent normal induction electrode, determining at least two normal induction electrodes which are sequentially connected as the normal induction electrodes adjacent to the induction electrode with the broken circuit from a first normal induction electrode adjacent to the induction electrode;
a fourth determining module 40428, configured to: if the electrode with the broken circuit is an induction electrode and the two sides of the induction electrode are provided with adjacent normal induction electrodes, determining at least one normal induction electrode as the normal induction electrode adjacent to the induction electrode with the broken circuit from the first normal induction electrode adjacent to the induction electrode for each of the two sides of the induction electrode.
It should be noted that, for the sake of clarity, the normal electrode determining module 4042 is logically divided into a first determining module 40422, a second determining module 40424, a third determining module 40426 and a fourth determining module 40428 in this embodiment, but it should be understood by those skilled in the art that, in practical applications, the first, second, third and fourth determining modules may be disposed in a combined manner or disposed independently, and the embodiment of the present invention is not limited thereto.
Alternatively, the normal driving electrode adjacent to the driving electrode where the disconnection occurs is determined as two normal driving electrodes; and/or the determined normal sensing electrode adjacent to the sensing electrode with the disconnection is two normal sensing electrodes.
Optionally, the compensation module 406 is configured to perform capacitance compensation on the current open-circuit capacitor node according to a relationship between a maximum capacitance value and a minimum capacitance value of the adjacent normal capacitor node, for each open-circuit capacitor node.
Optionally, the relationship between the maximum capacitance value and the minimum capacitance value is a ratio between the maximum capacitance value and the minimum capacitance value.
Optionally, the compensation module 406 is configured to determine whether a ratio between the maximum capacitance value and the minimum capacitance value is greater than a set threshold; if not, performing capacitance compensation on the current open circuit capacitance node according to the ratio; and if the ratio is larger than the preset threshold, setting the ratio as the preset threshold, and performing capacitance compensation on the current open circuit capacitance node according to the set ratio.
Optionally, the compensation module 406 is configured to perform capacitance compensation on the current open-circuit capacitor node according to the ratio, the maximum capacitance value, and the minimum capacitance value if adjacent normal electrodes exist on both sides of the open-circuit electrode.
Optionally, the compensation module 406 is configured to calculate a first compensation value according to the ratio, the maximum capacitance value, and the minimum capacitance value if adjacent normal electrodes exist on both sides of the electrode with the open circuit; and taking the first compensation value as the capacitance value of the current open circuit capacitance node.
Optionally, the compensation module 406 is configured to perform capacitance compensation on the currently open-circuit capacitance node according to the ratio and the maximum capacitance value if only one side of the electrode that is open-circuited has an adjacent normal electrode.
Optionally, the compensation module 406 is configured to calculate a second compensation value according to the ratio and the maximum capacitance value if only one side of the disconnected electrode has an adjacent normal electrode; and taking the second compensation value as the capacitance value of the current open circuit capacitance node.
Optionally, the obtained capacitance value of the normal capacitance node is: and the difference value between the stable reference value of the normal capacitance node and the current capacitance value.
Optionally, the electrode abnormality processing apparatus of this embodiment further includes: the open circuit detection module 408 is configured to collect a capacitance value of a certain frame of the touch screen after the touch screen is powered on and before a stable reference value of the touch screen is established; determining the maximum capacitance value in a plurality of capacitance nodes corresponding to each electrode from the acquired frame capacitance value; and if the maximum capacitance value is smaller than the set capacitance value, determining the corresponding electrode as an open circuit electrode.
The electrode abnormality processing apparatus of this embodiment is used to implement the corresponding electrode abnormality processing method in the foregoing method embodiments, and has the beneficial effects of the corresponding method embodiments, which are not described herein again.
EXAMPLE five
Referring to fig. 7, a schematic structural diagram of a touch screen according to a fifth embodiment of the present invention is shown.
The touch screen of the present embodiment includes a touch controller 502 and a touch sensor 504, and the touch controller 502 and the touch sensor 504 are electrically connected.
Touch sensor 504 includes a plurality of driving electrodes 5042 and a plurality of sensing electrodes 5044 distributed perpendicular to driving electrodes 5042. The drive electrodes 5042 are arranged in a horizontal direction (transverse) and the sense electrodes 5044 are arranged in a vertical direction (longitudinal), wherein the junction where the drive electrodes 5042 and the sense electrodes 5044 meet forms a capacitive node.
The touch controller 502 inputs a driving signal with a preset frequency to the driving electrode 5042 according to a certain driving manner, and the driving signal passes through the capacitive sensor and then forms a sensing signal by the sensing electrode 5044 and returns to the touch controller 502. The touch controller 502 converts the sensing signal into a Digital signal through an Analog-to-Digital Converter (ADC) disposed therein, and analyzes the Digital signal, thereby obtaining capacitance values corresponding to the capacitance nodes.
In this embodiment, the touch sensor 504 collects capacitance values of capacitance nodes on the touch screen; the touch controller 502 obtains the capacitance value acquired by the touch sensor 504, and executes the operation corresponding to the electrode abnormality processing method according to any one of the first to second embodiments.
For example, the touch sensor 504 acquires a capacitance value of a capacitance node of the touch screen when a finger performs a touch operation on the touch screen; the touch controller 502 determines that a target capacitance node of the touch screen operated by the touch operation includes an open capacitance node corresponding to an open circuit electrode, where the open circuit electrode includes an electrode that is open circuit in a capacitance sensor of the touch screen; determining normal electrodes adjacent to the open-circuit electrodes, and acquiring capacitance values of normal capacitance nodes adjacent to the open-circuit capacitance nodes on the determined normal electrodes from the capacitance values acquired by the touch sensor 504; and carrying out capacitance compensation on the open-circuit capacitance node according to the capacitance value of the normal capacitance node.
With the touch screen of the embodiment, when the touch screen is in an electrode open circuit in use after leaving a factory, capacitance compensation is performed on the capacitance node in the open circuit electrode related to the touch operation through the capacitance node on the normal electrode adjacent to the open circuit electrode. For touch operation, the touch position usually involves a plurality of adjacent electrodes, and the capacitance difference between corresponding capacitance nodes on the plurality of adjacent electrodes should be within a small range, so that the capacitance of the capacitance node on the normal electrode adjacent to the open circuit electrode can be used to effectively perform capacitance compensation on the corresponding capacitance node on the open circuit electrode, thereby avoiding touch screen faults such as disconnection, and extinction caused by electrode open circuit.
In addition, the embodiment of the invention also provides an electronic terminal which comprises the touch screen in the embodiment.
The above-described embodiments of the apparatus are merely illustrative, wherein the modules described as separate parts may or may not be physically separate, and the parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions and/or portions thereof that contribute to the prior art may be embodied in the form of a software product that can be stored on a computer-readable storage medium including any mechanism for storing or transmitting information in a form readable by a computer (e.g., a computer). For example, a machine-readable medium includes Read Only Memory (ROM), Random Access Memory (RAM), magnetic disk storage media, optical storage media, flash memory storage media, electrical, optical, acoustical or other form of propagated signals (e.g., carrier waves, infrared signals, digital signals, etc.), and others, and the computer software product includes instructions for causing a computing device (which may be a personal computer, server, or network device, etc.) to perform the methods described in the various embodiments or portions of the embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (24)

1. An electrode exception handling method is applied to touch operation of a touch screen and comprises the following steps:
determining that a target capacitance node of a touch screen operated by touch operation comprises an open circuit capacitance node corresponding to an open circuit electrode, wherein the open circuit electrode is an electrode with an open circuit in a capacitance sensor of the touch screen;
determining a normal electrode adjacent to a broken electrode, and acquiring the capacitance value of a normal capacitance node adjacent to the broken capacitance node on the normal electrode;
for each open circuit capacitor node, according to the ratio between the maximum capacitance value and the minimum capacitance value of the adjacent normal capacitor nodes, performing capacitance compensation on the current open circuit capacitor node, specifically comprising: judging whether the ratio of the maximum capacitance value to the minimum capacitance value is larger than a set threshold value or not; if not, performing capacitance compensation on the current open circuit capacitance node according to the ratio; and if the ratio is larger than the preset threshold, setting the ratio as the preset threshold, and performing capacitance compensation on the current open circuit capacitance node according to the set ratio.
2. The method of claim 1, wherein determining a normal electrode adjacent to an open circuit electrode, and obtaining the determined capacitance value of the normal capacitance node adjacent to the open circuit capacitance node on the normal electrode comprises:
determining a normal driving electrode adjacent to the driving electrode with the broken circuit, and/or a normal sensing electrode adjacent to the sensing electrode with the broken circuit;
and acquiring the capacitance value of the normal capacitance node adjacent to the open circuit capacitance node on the normal driving electrode, and/or acquiring the capacitance value of the normal capacitance node adjacent to the open circuit capacitance node on the normal sensing electrode.
3. The method of claim 2, wherein said determining a normal electrode adjacent to an electrode at which an open circuit occurred comprises:
and determining a normal electrode adjacent to the electrode with the open circuit according to the position of the electrode with the open circuit.
4. The method of claim 3, wherein said determining a normal electrode adjacent to the open circuited electrode based on the location of the open circuited electrode comprises:
if the electrode with the broken circuit is a driving electrode and only one side of the driving electrode has an adjacent normal driving electrode, determining at least two normal driving electrodes which are sequentially connected as the normal driving electrodes adjacent to the driving electrode with the broken circuit from a first normal driving electrode adjacent to the driving electrode;
if the electrode with the broken circuit is a driving electrode and two sides of the driving electrode are provided with adjacent normal driving electrodes, determining at least one normal driving electrode as a normal driving electrode adjacent to the driving electrode with respect to each of the two sides of the driving electrode, starting from a first normal driving electrode adjacent to the driving electrode;
if the electrode with the broken circuit is an induction electrode and only one side of the induction electrode has an adjacent normal induction electrode, determining at least two normal induction electrodes which are sequentially connected as the normal induction electrodes adjacent to the induction electrode with the broken circuit from a first normal induction electrode adjacent to the induction electrode;
if the electrode with the broken circuit is an induction electrode and the two sides of the induction electrode are provided with adjacent normal induction electrodes, determining at least one normal induction electrode as the normal induction electrode adjacent to the induction electrode with the broken circuit from the first normal induction electrode adjacent to the induction electrode for each of the two sides of the induction electrode.
5. The method of claim 4, wherein the determined normal driving electrodes adjacent to the driving electrode where the disconnection occurs are two normal driving electrodes; and/or the determined normal sensing electrode adjacent to the sensing electrode with the disconnection is two normal sensing electrodes.
6. The method of claim 1, wherein the capacitively compensating the currently open capacitive node comprises:
and if the two sides of the electrode with the open circuit are provided with the adjacent normal electrodes, performing capacitance compensation on the current open circuit capacitance node according to the ratio, the maximum capacitance value and the minimum capacitance value.
7. The method of claim 6, wherein said capacitively compensating the currently open capacitive node based on the ratio, the maximum capacitive value, and the minimum capacitive value comprises:
calculating a first compensation value according to the ratio, the maximum capacitance value and the minimum capacitance value; and taking the first compensation value as the capacitance value of the current open circuit capacitance node.
8. The method of claim 1, wherein the capacitively compensating the currently open capacitive node comprises:
and if only one side of the electrode with the open circuit has an adjacent normal electrode, performing capacitance compensation on the current open circuit capacitance node according to the ratio and the maximum capacitance value.
9. The method of claim 8, wherein said capacitively compensating the currently open capacitive node based on the ratio and the maximum capacitance value comprises:
calculating a second compensation value according to the ratio and the maximum capacitance value; and taking the second compensation value as the capacitance value of the current open circuit capacitance node.
10. The method of any one of claims 1-5, wherein the capacitance value of the normal capacitance node is obtained as: and the difference value between the stable reference value of the normal capacitance node and the current capacitance value.
11. The method of any one of claims 1-5, wherein prior to the determining that the target capacitance node of the touch screen operated by the touch operation includes an open capacitance node corresponding to an open electrode, the method further comprises:
after the touch screen is powered on and before a stable reference value of the touch screen is established, collecting a capacitance value of a certain frame of the touch screen;
determining the maximum capacitance value in a plurality of capacitance nodes corresponding to each electrode from the acquired capacitance value of the frame;
and if the maximum capacitance value is smaller than the set capacitance value, determining the corresponding electrode as an open circuit electrode.
12. An electrode exception handling device is applied to a touch screen and comprises:
the touch screen comprises a determining module, a judging module and a judging module, wherein the determining module is used for determining that a target capacitance node of the touch screen operated by touch operation comprises an open circuit capacitance node corresponding to an open circuit electrode, and the open circuit electrode comprises an electrode which is open circuit in a capacitance sensor of the touch screen;
the acquisition module is used for determining a normal electrode adjacent to a broken electrode and acquiring the capacitance value of a normal capacitance node adjacent to the broken capacitance node on the normal electrode;
the compensation module, to each capacitance node that opens circuit, according to the ratio between the maximum capacitance value and the minimum capacitance value of adjacent normal capacitance node, carries out capacitance compensation to the capacitance node that opens circuit at present, specifically includes: judging whether the ratio of the maximum capacitance value to the minimum capacitance value is larger than a set threshold value or not; if not, performing capacitance compensation on the current open circuit capacitance node according to the ratio; and if the ratio is larger than the preset threshold, setting the ratio as the preset threshold, and performing capacitance compensation on the current open circuit capacitance node according to the set ratio.
13. The apparatus of claim 12, wherein the acquisition module is configured to determine a normal driving electrode adjacent to a driving electrode where an open circuit occurs and/or a normal sensing electrode adjacent to a sensing electrode where an open circuit occurs; and acquiring the capacitance value of the normal capacitance node adjacent to the open circuit capacitance node on the normal driving electrode, and/or acquiring the capacitance value of the normal capacitance node adjacent to the open circuit capacitance node on the normal sensing electrode.
14. The apparatus of claim 13, wherein the means for obtaining comprises:
the normal electrode determining module is used for determining a normal electrode adjacent to the electrode with the open circuit according to the position of the electrode with the open circuit;
and the capacitance value acquisition module is used for acquiring the determined capacitance value of the normal capacitance node adjacent to the open circuit capacitance node on the normal electrode.
15. The apparatus of claim 14, wherein the normal electrode determination module comprises:
the device comprises a first determining module, a second determining module and a control module, wherein the first determining module is used for determining at least two normal driving electrodes which are sequentially connected as the normal driving electrodes adjacent to the driving electrode with the open circuit from the first normal driving electrode adjacent to the driving electrode if the electrode with the open circuit is the driving electrode and the adjacent normal driving electrode exists on only one side of the driving electrode;
a second determining module, configured to determine, for each of two sides of the driving electrode, starting from a first normal driving electrode adjacent to the driving electrode, at least one normal driving electrode as a normal driving electrode adjacent to the driving electrode with an open circuit if the electrode with the open circuit is the driving electrode and there are adjacent normal driving electrodes on both sides of the driving electrode;
the third determining module is used for determining at least two normal induction electrodes which are sequentially connected as the normal induction electrodes adjacent to the induction electrode with the open circuit from the first normal induction electrode adjacent to the induction electrode if the electrode with the open circuit is the induction electrode and the adjacent normal induction electrode exists on only one side of the induction electrode;
and a fourth determining module, configured to determine, for each of two sides of the sensing electrode, starting from a first normal sensing electrode adjacent to the sensing electrode, at least one normal sensing electrode as a normal sensing electrode adjacent to the sensing electrode with the open circuit, if the electrode with the open circuit is the sensing electrode and there are adjacent normal sensing electrodes on both sides of the sensing electrode.
16. The apparatus of claim 15, wherein the determined normal driving electrodes adjacent to the driving electrode where the disconnection occurs are two normal driving electrodes; and/or the determined normal sensing electrode adjacent to the sensing electrode with the disconnection is two normal sensing electrodes.
17. The apparatus of claim 12, wherein the compensation module is configured to perform capacitance compensation on a current open-circuit capacitance node according to the ratio, the maximum capacitance value and the minimum capacitance value if there are neighboring normal electrodes on both sides of an electrode where the open circuit occurs.
18. The apparatus of claim 17, wherein the compensation module is configured to calculate a first compensation value according to the ratio, the maximum capacitance value and the minimum capacitance value if there are adjacent normal electrodes on both sides of the broken electrode; and taking the first compensation value as the capacitance value of the current open circuit capacitance node.
19. The apparatus of claim 12, wherein the compensation module is configured to perform capacitance compensation on a currently open capacitor node according to the ratio and the maximum capacitance value if there is an adjacent normal electrode on only one side of an electrode where the open circuit occurs.
20. The apparatus of claim 19, wherein the compensation module is configured to calculate a second compensation value according to the ratio and the maximum capacitance value if there is an adjacent normal electrode on only one side of the disconnected electrode; and taking the second compensation value as the capacitance value of the current open circuit capacitance node.
21. The apparatus of any one of claims 12-16, wherein the capacitance value of the normal capacitance node is obtained as: and the difference value between the stable reference value of the normal capacitance node and the current capacitance value.
22. The apparatus of any one of claims 12-16, wherein the apparatus further comprises:
the open circuit detection module is used for acquiring the capacitance value of a certain frame of the touch screen after the touch screen is powered on and before the stable reference value of the touch screen is established; determining the maximum capacitance value in a plurality of capacitance nodes corresponding to each electrode from the acquired capacitance value of the frame; and if the maximum capacitance value is smaller than the set capacitance value, determining the corresponding electrode as an open circuit electrode.
23. A touch screen, comprising: the touch control device is electrically connected with the touch sensor;
wherein,
the touch sensor is used for acquiring capacitance values of capacitance nodes on the touch screen;
the touch controller is configured to acquire a capacitance value acquired by the touch sensor, and perform an operation corresponding to the electrode exception handling method according to any one of claims 1 to 11 according to the acquired capacitance value.
24. An electronic terminal comprising the touch screen of claim 23.
CN201880000025.8A 2018-01-10 2018-01-10 Electrode abnormity processing method and device, touch screen and electronic terminal Active CN108369472B (en)

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