Touch screen temperature detection method, chip and touch-control device

Abstract

A touch screen temperature detection method, comprising: acquiring a first-type capacitance signal quantity and a second-type capacitance signal quantity corresponding to N touch-control electrodes in a touch screen (101), wherein N is a positive integer, N≥2, and the N touch-control electrodes are distributed in different regions of the touch screen; on the basis of the first-type capacitance signal quantity and the second-type capacitance signal quantity corresponding to the N touch-control electrodes, determining the real-time temperatures of the N touch-control electrodes (102); and on the basis of the real-time temperatures of the N touch-control electrodes, acquiring the real-time temperature of the touch screen (103). Also disclosed are a touch-control chip and a touch-control device.

Description

Touch screen temperature detection method and chip, and touch device

[0001] The present application claims priority to the Chinese patent application No. 202411028421.5, filed on July 29, 2024, and entitled "Touch screen temperature detection method and chip, and touch device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of touch screens, and in particular to a touch screen temperature detection method and chip, and touch device. BACKGROUND

[0003] As a human-computer interaction device, a touch screen is widely used in various electronic devices. When the touch screen detects a user's touch operation, a touch signal is generated. Based on the touch signal, the electronic device responds to the user's touch operation.

[0004] In actual applications, there is a need to detect the temperature of the touch screen. For example, in some application scenarios, an abnormal heating area on the touch screen is located. For another example, when the temperature of the touch screen is detected to be too high, a heat dissipation system is started to reduce the temperature of the touch screen.

[0005] However, in the prior art, when a touch operation occurs, the touch operation will have an impact on the real-time temperature of the touch screen, thereby causing the real-time temperature of the touch screen to be unable to be accurately obtained. SUMMARY

[0006] The present application aims to provide a touch screen temperature detection method and device, which can accurately obtain the real-time temperature of the touch screen.

[0007] In a first aspect, the present application provides a touch screen temperature detection method, comprising: obtaining a first type of capacitance signal amount and a second type of capacitance signal amount corresponding to N touch electrodes in a touch screen; the first type of capacitance signal amount comprises a first effective touch signal amount and a first capacitance change amount, and the second type of capacitance signal amount comprises a second effective touch signal amount and a second capacitance change amount; the first effective touch signal amount and the second effective touch signal amount are associated with a touch operation; the first capacitance change amount and the second capacitance change amount are associated with the real-time temperature of the touch electrode; N is a positive integer and N≥2, and the N touch electrodes are distributed in different regions of the touch screen; determining the real-time temperature of the N electrodes based on the first type of capacitance signal amount and the second type of capacitance signal amount corresponding to the N touch electrodes; obtaining the real-time temperature of the touch screen based on the real-time temperature of the N touch electrodes; the real-time temperature of the touch screen is irrelevant to the touch operation.

[0008] The first type of capacitive signal quantity and the second type of capacitive signal quantity corresponding to N touch electrodes in the touch screen are acquired. The real-time temperature of each touch electrode is determined based on the first type of capacitive signal quantity and the second type of capacitive signal quantity corresponding to each touch electrode, and the real-time temperature of the touch screen is acquired. Since the N touch electrodes are distributed at different positions of the touch screen, the temperature of the touch screen can be accurately acquired.

[0009] Optionally, the first type of capacitive signal quantity of the ith touch electrode in the N touch electrodes is S: S=D s +ΔC s The second type of capacitive signal quantity of the ith touch electrode is M: M=D m +ΔC m , wherein: D s is the first effective touch signal quantity, D m is the second effective touch signal quantity; ΔC s is the first capacitive change quantity, and ΔC s =X×T s ; ΔC m is the second capacitive change quantity, and ΔC m =X×T m , X is the real-time temperature of the touch electrode in the touch area; T s is the first temperature change rate, T m is the second temperature change rate, T s is the same as the sign of D s , T m is opposite to the sign of D m , or when T s is opposite to the sign of D s , T m is the same as the sign of D m .

[0010] Optionally, the real-time temperature of the N touch electrodes is determined based on the first type of capacitive signal quantity and the second type of capacitive signal quantity corresponding to the N touch electrodes, including: the real-time temperature of the ith touch electrode is determined based on S and M; i is a positive integer and 1≤i≤N.

[0011] Optionally, the real-time temperature X of the ith touch electrode is determined by the following formula: X=(aS+bM) / (aT s +bT m ); wherein, S is the first type of capacitive signal quantity corresponding to the ith touch electrode at the real-time temperature X, M is the second type of capacitive signal quantity corresponding to the ith touch electrode at the real-time temperature; a is a first coefficient, b is a second coefficient, and aD s +bD m =0 is satisfied.

[0012] Optionally, the first temperature change rate T s satisfies: T s =(S2-S1) / (X2-X1); the second temperature change rate T m satisfies: T m =(M2-M1) / (X2-X1); wherein, S1 is the first type of capacitance signal amount of the ith touch electrode at the first temperature X1, S2 is the first type of capacitance signal amount of the ith touch electrode at the second temperature X2; M1 is the second type of capacitance signal amount of the ith touch electrode at the first temperature X1, and M2 is the second type of capacitance signal amount of the ith touch electrode at the second temperature X2.

[0013] For the ith touch electrode, the corresponding first temperature change rate and the second temperature change rate are only related to the real-time temperature, and are irrelevant to the touch signal amount (D s , D m ) generated by the touch operation. Thus, the interference of the touch signal amount generated by the touch operation on the acquired real-time temperature can be avoided, so as to further improve the accuracy of the acquired real-time temperature.

[0014] Optionally, based on the real-time temperatures of the N touch electrodes, the real-time temperature of the touch screen is acquired, comprising: based on the real-time temperatures of the N touch electrodes, the real-time temperatures of different regions on the touch screen body are acquired.

[0015] Optionally, based on the real-time temperatures of the N touch electrodes, the real-time temperatures of different regions on the touch screen body are acquired, comprising: based on the real-time temperatures of the N touch electrodes, a temperature distribution matrix is constructed; the ith element in the temperature distribution matrix is the real-time temperature of the ith touch electrode in the touch screen.

[0016] Optionally, the N touch electrodes comprise at least one driving electrode and at least one receiving electrode; based on the real-time temperatures of the N touch electrodes, the real-time temperatures of different regions on the touch screen body are acquired, comprising: based on the real-time temperatures of the N touch electrodes, the temperatures of all cross nodes are acquired, the cross node being the intersection of one driving electrode and one receiving electrode; based on the temperatures of all cross nodes, a temperature distribution matrix is constructed; the element in the ith row and the jth column in the temperature distribution matrix is the real-time temperature of the cross node in the ith row and the jth column of the touch screen body.

[0017] Based on the real-time temperatures of the N touch electrodes, a temperature distribution matrix is constructed, so that the real-time temperatures of various regions in the touch screen can be intuitively displayed.

[0018] Optionally, the touch screen temperature detection method further comprises: determining an abnormal heating area on the touch screen based on the real-time temperatures of different areas on the touch screen body.

[0019] Optionally, the first type of capacitance signal amount is self-capacitance signal amount, and the second type of capacitance signal amount is mutual-capacitance signal amount; or, the first type of capacitance signal amount is mutual-capacitance signal amount, and the second type of capacitance signal amount is self-capacitance signal amount.

[0020] In a second aspect, the present application provides a touch chip, comprising: an acquisition module, configured to acquire a first type of capacitance signal amount and a second type of capacitance signal amount corresponding to N touch electrodes in a touch screen; the first type of capacitance signal amount comprises a first effective touch signal amount and a first capacitance change amount, and the second type of capacitance signal amount comprises a second effective touch signal amount and a second capacitance change amount; the first effective touch signal amount and the second effective touch signal amount are associated with a touch operation; the first capacitance change amount and the second capacitance change amount are associated with a real-time temperature of the touch electrode; N is a positive integer and N≥2, and the N touch electrodes are distributed in different areas of the touch screen; a determination module, configured to determine the real-time temperature of the N touch electrodes based on the first type of capacitance signal amount and the second type of capacitance signal amount corresponding to the N touch electrodes; and a processing module, configured to acquire a real-time temperature of the touch screen based on the real-time temperature of the N touch electrodes; the real-time temperature of the touch screen is irrelevant to the touch operation.

[0021] Optionally, the touch chip can further comprise: a storage module, in which a first effective touch signal amount D s , a second effective touch signal amount D m , a first temperature change rate T s , and a second temperature change rate T m corresponding to the i-th touch electrode are stored; the D s , D m , T s , and T m are used to determine the real-time temperature of the i-th touch electrode; i is a positive integer and 1≤i≤N.

[0022] In a third aspect, the present application further provides a touch device, comprising a touch electrode and a touch chip connected thereto, and the touch chip performs the steps of any one of the above-mentioned touch screen temperature detection methods. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a flow chart of a touch screen temperature detection method in an embodiment of the present application;

[0024] Fig. 2 is a schematic diagram of touch electrode distribution of a self-capacitance type capacitive screen;

[0025] Fig. 3 is a schematic diagram of a touch electrode distribution of a self-integrated capacitive screen according to prior art;

[0026] Fig. 4 is a waveform diagram of a capacitive signal in a touch process according to an embodiment of the present application;

[0027] Fig. 5 is a waveform diagram of a temperature signal according to an embodiment of the present application;

[0028] Fig. 6 is a schematic diagram of a touch chip according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In prior art, the real-time temperature of a specific chip in a touch screen is detected, and the real-time temperature of the specific chip is taken as the real-time temperature of the touch screen. However, the real-time temperature of the specific chip can only reflect the real-time temperature of a partial area of the touch screen, and cannot accurately represent the real-time temperature of the whole area of the touch screen.

[0030] In an embodiment of the present application, the first type of capacitive signal quantity and the second type of capacitive signal quantity corresponding to N touch electrodes in a touch screen are acquired. Based on the first type of capacitive signal quantity and the second type of capacitive signal quantity corresponding to each touch electrode, the real-time temperature of each touch electrode is determined. Since the N touch electrodes are distributed at different positions of the touch screen, the temperature of the whole screen body of the touch screen can be accurately acquired.

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0032] An embodiment of the present application provides a touch screen temperature detection method, which will be described in detail below by specific steps with reference to Fig. 1.

[0033] In step 101, the first type of capacitive signal quantity and the second type of capacitive signal quantity corresponding to N touch electrodes in a touch screen are acquired.

[0034] In an embodiment of the present application, the touch operation can include a contact type touch operation and a non-contact type sensing operation. The non-contact type sensing operation can be a touch operation with a separation article such as a glove. The non-contact type sensing operation can also include a proximity type sensing, such as capacitive sensing caused by opening and closing a cover of a notebook computer.

[0035] In an embodiment of the present application, when there is a demand for acquiring the real-time temperature of the touch screen, the first type of capacitive signal quantity and the second type of capacitive signal quantity corresponding to N touch electrodes in the touch screen can be acquired.

[0036] In some embodiments, a function option can be set, and the demand for detecting the real-time temperature of the touch screen can be triggered by triggering the function option.

[0037] In some embodiments, the touch screen is embedded in the electronic device. When the electronic device is detected to be in a certain preset state, it is determined that there is a need to acquire the real-time temperature of the touch screen. For example, when the electronic device is detected to be in a charging state, it is determined that there is a need to acquire the real-time temperature of the touch screen.

[0038] In some embodiments, the user can input an operation instruction through the touch screen to acquire the real-time temperature of the touch screen.

[0039] It can be understood that there can be other application scenarios in which the real-time temperature of the touch screen needs to be acquired, which are not listed here.

[0040] In specific implementations, the touch screen can include a plurality of touch electrodes, some of which can be used to transmit signals, and some of which can be used to receive signals.

[0041] In some embodiments, the electrodes used to transmit signals can also be referred to as driving electrodes, and the electrodes used to receive signals can also be referred to as receiving electrodes.

[0042] In specific implementations, the touch screen can be a capacitive screen, specifically a self-capacitive capacitive screen, a mutual-capacitive capacitive screen, a self-mutual integrated capacitive screen, a touch-and-display integrated capacitive screen, etc.

[0043] Referring to FIG. 2, a touch electrode distribution diagram of a self-capacitive capacitive screen is given. In FIG. 2, the self-capacitive capacitive screen can include a plurality of touch electrodes arranged in the vertical direction. In some application scenarios, the touch electrodes in the even-numbered columns are used as driving electrodes to transmit signals, and the touch electrodes in the odd-numbered columns are used as receiving electrodes to receive signals. In other application scenarios, the touch electrodes in the odd-numbered columns are used as driving electrodes to transmit signals, and the touch electrodes in the even-numbered columns are used as receiving electrodes to receive signals.

[0044] Referring to FIG. 3, an electrode distribution diagram of a self-mutual integrated capacitive screen is given. In FIG. 3, the self-mutual integrated capacitive screen can include a plurality of driving electrodes arranged in the horizontal direction and a plurality of receiving electrodes arranged in the vertical direction, and the driving electrodes and the receiving electrodes are insulatively and crossly arranged.

[0045] In embodiments of the present application, a first type of capacitive signal quantity and a second type of capacitive signal quantity of N touch electrodes in the touch screen can be acquired. N≤K, K is the total number of touch electrodes in the touch screen.

[0046] In specific implementations, for any touch electrode i in the N touch electrodes, the corresponding first type of capacitive signal quantity can include a first effective touch signal quantity and a first type of capacitive change quantity; and the second type of capacitive signal quantity corresponding to the touch electrode i can include a second effective touch signal quantity and a second type of capacitive change quantity.

[0047] The first effective touch signal amount corresponding to the touch electrode i can refer to a first type of capacitive touch signal amount generated by a touch operation when the touch electrode i is touched. The second effective touch signal amount corresponding to the touch electrode i can refer to a second type of capacitive touch signal amount generated by a touch operation when the touch electrode i is touched. The first type of capacitive touch signal amount and the second type of capacitive touch signal amount can be collected in time. The first type of capacitive touch signal amount can be collected first, and then the second type of capacitive touch signal amount can be collected. Alternatively, the second type of capacitive touch signal amount can be collected first, and then the first type of capacitive touch signal amount can be collected.

[0048] That is, the first effective touch signal amount and the second effective touch signal amount of the touch electrode i are associated with a touch operation. When the touch electrode i is not touched, the first effective touch signal amount and the second effective touch signal amount of the touch electrode i are 0. Alternatively, when the touch electrode i is not touched, the touch electrode i does not have the first effective touch signal amount and the second effective touch signal amount.

[0049] In specific implementation, the first type of capacitive change amount corresponding to the touch electrode i can refer to a change amount of the first type of capacitive signal amount generated when a real-time temperature of the touch electrode i changes. The second type of capacitive change amount corresponding to the touch electrode i can refer to a change amount of the second type of capacitive signal amount generated when the real-time temperature of the touch electrode i changes.

[0050] It can be seen that the first type of capacitive change amount and the second type of capacitive change amount of the touch electrode i can only be associated with the real-time temperature of the touch electrode i.

[0051] In the embodiment of the application, the first effective touch signal amount of the touch electrode i can not change with the change of the temperature, or in other words, the change amount of the first effective touch signal amount generated by the change of the real-time temperature can be negligible. The second effective touch signal amount can not change with the change of the real-time temperature, or in other words, the change amount of the second effective touch signal amount generated by the change of the real-time temperature can be negligible.

[0052] In specific implementation, the first type of capacitive signal amount and the second type of capacitive signal amount can be output by a module with data processing capability based on original capacitive real-time values after operation. The operation process can be that the original capacitive real-time value is subtracted by a reference capacitive value. The first effective touch signal amount is the amount of change of the first type of capacitive signal amount caused before and after touch under constant temperature conditions. The second effective touch signal amount is the amount of change of the second type of capacitive signal amount caused before and after touch under constant temperature conditions.

[0053] In specific implementation, the first capacitive change amount is affected by the real-time temperature and the first temperature change rate, and the second capacitive change amount is affected by the real-time temperature and the second temperature change rate.

[0054] Specifically, if the first temperature change rate is positive, the first capacitance change amount increases with the increase of the real-time temperature and decreases with the decrease of the real-time temperature. If the first temperature change rate is negative, the first capacitance change amount decreases with the increase of the real-time temperature and increases with the decrease of the real-time temperature.

[0055] Correspondingly, if the second temperature change rate is positive, the second capacitance change amount increases with the increase of the real-time temperature and decreases with the decrease of the real-time temperature. If the second temperature change rate is negative, the second capacitance change amount decreases with the increase of the real-time temperature and increases with the decrease of the real-time temperature.

[0056] In the embodiment of the present application, when the first temperature change rate is the same as the sign of the first effective touch signal amount, the second temperature change rate is opposite to the sign of the second effective touch signal amount. Or, when the first temperature change rate is opposite to the sign of the first effective touch signal amount, the second temperature change rate is the same as the sign of the second effective touch signal amount.

[0057] In the specific implementation, for the touch electrode i, the following several cases described in Table 1 are included:

[0058] Table 1

[0059] In Table 1, D s is the first effective touch signal amount, T s is the first temperature change rate; D m is the second effective touch signal amount, T m is the first temperature change rate.

[0060] For the sake of brevity, only some cases are explained in detail:

[0061] As in case 3 in the above Table 1, when the first effective touch signal amount is negative and the second effective touch signal amount is negative, the first temperature change rate is positive, and the first capacitance change amount has the same change trend as the real-time temperature; the second temperature change rate is negative, and the second capacitance change amount has the opposite change trend as the real-time temperature.

[0062] In case 5 in the above Table 1, when the first effective touch signal amount is positive and the second effective touch signal amount is negative, the first temperature change rate is positive, and the first capacitance change amount has the same change trend as the real-time temperature; the second temperature change rate is positive, and the second capacitance change amount has the same change trend as the real-time temperature.

[0063] In case 6 in Table 1, when the first effective touch signal amount is negative, and when the second effective touch signal amount is positive, the first temperature change rate is positive, and the first capacitance change amount is the same as the change trend of the real-time temperature; the second temperature change rate is positive, and the second capacitance change amount is the same as the change trend of the real-time temperature.

[0064] In case 7 in Table 1, when the first effective touch signal amount is positive, and when the second effective touch signal amount is negative, the first temperature change rate is negative, and the first capacitance change amount is opposite to the change trend of the real-time temperature; the second temperature change rate is negative, and the second capacitance change amount is opposite to the change trend of the real-time temperature.

[0065] In a specific implementation, for the touch electrode i, a first type of capacitance signal amount S0 when there is no touch operation, and a second type of capacitance signal amount M0 when there is no touch operation can be obtained. In the process of touching the touch device, for the touch electrode i, at the initial moment of the touch operation, a first type of capacitance signal amount corresponding to the touch electrode i can be obtained, denoted as S1; a second type of capacitance signal amount corresponding to the touch electrode i can be obtained, denoted as M1. At the initial moment of the touch operation, the real-time temperature of the touch electrode i is X1.

[0066] Since at the initial moment of the touch operation, the touch object (such as a user's finger) just contacts the touch electrode i, the influence of the surface temperature of the touch object on the real-time temperature of the touch electrode i can be ignored. Therefore, the first effective touch signal amount is D s =S1-S0, and the second effective touch signal amount is D m =M1-M0. S0 is the first type of capacitance signal amount of the touch electrode i when there is no touch operation, and M0 is the second type of capacitance signal amount of the touch electrode i when there is no touch operation.

[0067] In some embodiments, for the touch electrode i, at time t, the first type of capacitance signal amount S corresponding to the touch electrode i can be represented as: S=D s +X×T s , and the second type of capacitance signal amount M can be represented as: M=D m +X×T m , where X is the real-time temperature of the touch electrode i at time t; T s is the first temperature change rate of the touch electrode i, and T m is the second temperature change rate of the touch electrode i.

[0068] In an implementation, D s may be positive, T s may be positive, D m may be negative, and T m may be positive. X×T sThis is the change in the first capacitance. As the real-time temperature X gradually increases, X×T s The signal quantity S of the first type of capacitance also gradually increases; as the real-time temperature X gradually decreases, X×T s The signal quantity S of the first type of capacitance also gradually decreases. X×T m This is the change in the second capacitance. As the real-time temperature X gradually increases, X×T m As the real-time temperature X gradually decreases, the second type of capacitance signal quantity M gradually increases; X×T m As the signal gradually decreases, the second type of capacitor signal quantity M gradually decreases.

[0069] In another implementation, it could also be D. s If T is negative, s If the value is negative, D m If T is positive, m It is a negative value. X×T s This is the change in the first capacitance. As the real-time temperature X gradually increases, X×T s It also gradually decreases, and the corresponding first-type capacitance signal quantity S gradually decreases; when the real-time temperature X gradually decreases, X×T s As it gradually increases, the corresponding first-type capacitor signal quantity S also gradually increases. X×T m This is the change in the second capacitance. As the real-time temperature X gradually increases, X×T m As the real-time temperature X gradually decreases, the second type of capacitance signal M gradually decreases; as X×T gradually decreases, m As it gradually increases, the second type of capacitor signal quantity M gradually increases.

[0070] It can be seen that the first type of capacitive signal S for touch electrode i consists of the following two parts: a first effective touch signal D that does not change with temperature. s And the change in the first capacitance X×T with temperature s Accordingly, the second type of capacitive signal M for touch electrode i consists of the following two parts: a second effective touch signal D that does not change with temperature. m And the change in the second capacitance X×T with temperature m .

[0071] In some embodiments, the first type of capacitance signal of the touch electrode i can be the self-capacitance signal of the touch electrode i, and the second type of capacitance signal of the touch electrode i can be the mutual capacitance signal of the touch electrode i.

[0072] Accordingly, the first effective touch signal quantity corresponding to touch electrode i is: the self-capacitance touch signal quantity generated by touch electrode i due to the touch operation when touch electrode i is touched. The second effective touch signal quantity corresponding to touch electrode i is: the mutual capacitance touch signal quantity generated by touch electrode i due to the touch operation when touch electrode i is touched. The first type of capacitance change quantity of touch electrode i is: the self-capacitance change quantity when touch electrode i is touched, as the real-time temperature of touch electrode i changes. The second type of capacitance change quantity of touch electrode i is: the mutual capacitance change quantity when touch electrode i is touched, as the real-time temperature of touch electrode i changes.

[0073] In other embodiments, the first type of capacitance signal of the touch electrode i can also be the mutual capacitance signal of the touch electrode i, and the second type of capacitance signal of the touch electrode i can be the self-capacitance signal of the touch electrode i.

[0074] Accordingly, the first effective touch signal quantity corresponding to touch electrode i is: the mutual capacitance touch signal quantity generated by touch electrode i due to the touch operation when touch electrode i is touched. The second effective touch signal quantity corresponding to touch electrode i is: the self-capacitance touch signal quantity generated by touch electrode i due to the touch operation when touch electrode i is touched. The first type of capacitance change quantity of touch electrode i is: the mutual capacitance change quantity when touch electrode i is touched, as the real-time temperature of touch electrode i changes. The second type of capacitance change quantity of touch electrode i is: the self-capacitance change quantity when touch electrode i is touched, as the real-time temperature of touch electrode i changes.

[0075] In practical implementation, the first and second types of capacitance signals of the touch electrode i at different temperatures when it is touched can be obtained in advance through measurement. Furthermore, based on the first and second types of capacitance signals of the touch electrode i at different temperatures, the first temperature change rate T of the touch electrode i can be fitted. s and the second temperature change rate T m First effective touch signal quantity D s And the second effective touch signal quantity D m .

[0076] For example, the first type of capacitance signal S and the second type of capacitance signal M of the touch electrode i are obtained in advance at temperatures of -10℃, 0℃, 10℃, 20℃, 30℃, 40℃ and 50℃, as shown in Table 1 below.

[0077] Table 1

[0078] In Table 1, S1 represents the first type of capacitive signal quantity of touch electrode i at a temperature of -10℃, and M1 represents the second type of capacitive signal quantity of touch electrode i at a temperature of -10℃. Similarly, S7 represents the first type of capacitive signal quantity of touch electrode i at a temperature of 50℃, and M7 represents the second type of capacitive signal quantity of touch electrode i at a temperature of 50℃.

[0079] In some embodiments, a copper pillar inside a constant temperature chamber can be placed on the surface of the touch electrode i. By setting the temperature of the copper pillar inside the constant temperature chamber, the first type of capacitance signal and the second type of capacitance signal corresponding to the touch electrode i at different temperatures can be obtained.

[0080] It is understandable that other methods may exist to obtain the first type of capacitance signal and the second type of capacitance signal of the touch electrode i at different temperatures. Furthermore, the aforementioned different temperatures may include only two different temperatures (such as 0℃ and 30℃), or more different temperatures (such as 0℃, 20℃, 40℃, etc.).

[0081] After acquiring the first type of capacitance signal and the second type of capacitance signal of the touch electrode i at different temperatures, the first temperature change rate T corresponding to the touch electrode i can be determined. s and the second temperature change rate T m First effective touch signal quantity D s And the second effective touch signal quantity D m .

[0082] For example, obtain S1 and M1 corresponding to touch electrode i at the first temperature X1, and S2 and M2 corresponding to touch electrode i at the second temperature X2, and determine T. s =(S2-S1) / (X2-X1), T m =(M2-M1) / (X2-X1), then D s =S1-T s ×X1,D m =M1-T m ×X1.

[0083] It is understandable that the above T s T m The acquisition process can also employ other methods. For example, polynomial fitting algorithms, least squares algorithms, etc., can be used to calculate the T corresponding to touch electrode i. s T m D s D m .

[0084] The following description, in conjunction with the touch process, explains the first type of capacitive signal quantity, the second type of capacitive signal quantity, the first temperature change rate, the second temperature change rate, the first effective touch signal quantity, and the second effective touch signal quantity in the above embodiments.

[0085] Referring to Figure 4, a waveform diagram of the capacitive signal during a touch process is shown in an embodiment of the present invention. The following description is based on Figure 4.

[0086] When no touch operation is performed on the touch electrode i, the temperature of the touch electrode i can be the ambient temperature of the external environment in which the touch electrode i is located. When a touch operation is performed on the touch electrode i, the temperature of the touch electrode i will change.

[0087] Taking the user's finger touching the touch electrode i as an example, since the surface temperature of the user's finger is different from the temperature of the touch electrode i, and the temperature of the touch electrode i will change as the operating time of the touch device increases.

[0088] In some embodiments, for touch electrode i, since S = D s +X×T s M = D m +X×T m Because of D s >0, D m Since <0, we can obtain the first coefficient a and the second coefficient b to eliminate D. s and D m That is, the first coefficient a and the second coefficient b can satisfy aD s +bD m =0.

[0089] Since the first coefficient a and the second coefficient b satisfy aD s +bD m =0, therefore we can obtain: aS + bM = aT s X+bT m X=X(aT s +bT m );

[0090] Therefore, the real-time temperature X of the touch electrode i at time t can be obtained as X = (aS + bM) / (aT) s +bT m It can be seen that the obtained real-time temperature X is related to D. s and D m Irrelevant.

[0091] In some embodiments, if the first coefficient a = 1, then b = -D s / D m Correspondingly, the real-time temperature of touch electrode i at time t

[0092] As can be seen, the real-time temperature of touch electrode i can be obtained based on the first type of capacitance signal, the second type of capacitance signal, the first effective touch signal quantity and the second effective touch signal quantity corresponding to touch electrode i obtained in advance through calculation, and the first temperature change rate and the second temperature change rate stored in advance.

[0093] In some embodiments, after obtaining the first type of capacitance signal S0 when there is no touch operation on touch electrode i and the second type of capacitance signal M0 when there is no touch operation on touch electrode i, S0, M0, and the first type of capacitance change rate and the second type of capacitance change rate corresponding to touch electrode i can be stored in a preset storage module. Thus, the storage module can store the first type of capacitance change rate and the second type of capacitance change rate corresponding to N touch electrodes.

[0094] In other embodiments, after acquiring the first effective touch signal quantity and the second effective touch signal quantity of touch electrode i, aD is used in advance. s +bD m The first coefficient 'a' and the second coefficient 'b' are determined by setting the value to 0, and the first coefficient, the second coefficient, the first temperature change rate, and the second temperature change rate corresponding to touch electrode i are stored in a preset storage module. After obtaining the first type of capacitance signal and the second type of capacitance signal of touch electrode i, the first coefficient, the second coefficient, the first temperature change rate, and the second temperature change rate corresponding to touch electrode i can be obtained from the storage module, and then the real-time temperature of touch electrode i can be calculated.

[0095] As stated above, at time t, the real-time temperature X of the touch electrode i can be determined by the following formula: X = (aS + bM) / (aT) s +bT m ).

[0096] As can be seen, the real-time temperature X obtained in the embodiments of the present invention is unrelated to touch signals caused by touch operations, and is also unrelated to trigger signals caused by non-contact sensing operations, etc.

[0097] In specific implementation, based on the aforementioned first coefficient a and second coefficient b, aD s +bD m =0. Then we have aS + bM = aT s X+bT m X = Temp, which can be used to determine the temperature signal of the touch electrode i: Temp = X(aT) s +bT m Temp can characterize the change trend of the dielectric constant ε of the material of the touch electrode i with temperature.

[0098] Referring to Figure 5, a waveform diagram of a temperature signal in an embodiment of the present invention is shown. In Figure 5, the temperature of the touch electrode i gradually increases with the increase of touch time.

[0099] In this embodiment of the invention, the real-time temperature corresponding to each touch electrode in the touchscreen can be obtained in accordance with the manner described in the above embodiments. Furthermore, based on the real-time temperature of each touch electrode, the real-time temperature distribution of different areas within the touchscreen body can be obtained.

[0100] Based on the self-capacitive touchscreen shown in Figure 2, a temperature distribution matrix can be constructed using the real-time temperatures of the N touch electrodes. This temperature distribution matrix can be one-dimensional. In the temperature distribution matrix, the i-th element represents the real-time temperature of the i-th touch electrode.

[0101] For example, a self-capacitive touchscreen includes 10 touch electrodes, numbered 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 from left to right. Based on the real-time temperatures of the 10 touch electrodes, a one-dimensional temperature distribution matrix [x1, x2, x3, x4, x5, x6, x7, x8, x9, x10] is obtained, where x1 is the real-time temperature corresponding to touch electrode 1, x2 is the real-time temperature corresponding to touch electrode 2, and so on, with x10 being the real-time temperature corresponding to touch electrode 10.

[0102] By combining the self-interconnected capacitive touchscreen or mutual-capacitive touchscreen shown in Figure 3, the lateral temperature distribution of the touchscreen body can be obtained based on the real-time temperature of all driving electrodes. The longitudinal temperature distribution of the touchscreen body can be obtained based on the real-time temperature of all receiving electrodes. Furthermore, based on the real-time temperature of each driving electrode and the real-time temperature of each receiving electrode, the real-time temperature of each intersection node can be obtained.

[0103] After obtaining the real-time temperature of each intersection node, a real-time temperature distribution matrix can be constructed to characterize the real-time temperature distribution of the touchscreen screen. In the obtained real-time temperature distribution matrix, the element in the i-th row and j-th column represents the real-time temperature of the intersection node in the i-th row and j-th column of the touchscreen screen. By obtaining the real-time temperature of each intersection node in the touchscreen screen, the real-time temperature of different areas within the touchscreen screen can be determined.

[0104] In some embodiments, the arithmetic mean of the real-time temperature of the i-th driving electrode and the real-time temperature of the j-th receiving electrode can be calculated as the real-time temperature A of the i-th row and j-th column intersection node in the touch screen. ij That is: A ij =(X ui +X vj ), where X ui X is the real-time temperature of the i-th driving electrode.vj Let be the real-time temperature of the j-th receiving electrode.

[0105] In other embodiments, the real-time temperature A of the i-th row and j-th column intersection node in the touchscreen can also be calculated using the following formula. ij :

[0106] Understandably, other calculation methods can also be used to calculate the real-time temperature of the i-th row and j-th column intersection node on the touch screen.

[0107] In summary, in this embodiment of the invention, the first type of capacitance signal and the second type of capacitance signal corresponding to the N touch electrodes in the touchscreen are obtained. Based on the first type of capacitance signal and the second type of capacitance signal corresponding to each touch electrode, the real-time temperature of each touch electrode is determined, thereby obtaining the real-time temperature of the touchscreen. Since the N touch electrodes are distributed in different positions on the touchscreen, the temperature of the entire touchscreen can be accurately obtained.

[0108] Referring to Figure 6, a touch chip 60 according to an embodiment of the present invention is shown, including: an acquisition module 601, a determination module 602, and a processing module 603, wherein:

[0109] The acquisition module 601 is used to acquire a first type of capacitance signal quantity and a second type of capacitance signal quantity corresponding to N electrodes in the touch screen; the first type of capacitance signal quantity includes a first effective touch signal quantity and a first capacitance change quantity, and the second type of capacitance signal quantity includes a second effective touch signal quantity and a second capacitance change quantity; the first effective touch signal quantity and the second effective touch signal quantity are associated with the touch operation; the first capacitance change quantity and the second capacitance change quantity are associated with the real-time temperature of the touch electrode; N is a positive integer and N≥2, and the N electrodes are distributed in different areas of the touch screen;

[0110] The determination module 602 is used to determine the real-time temperature of the N electrodes based on the first type of capacitance signal quantity and the second type of capacitance signal quantity corresponding to the N electrodes.

[0111] The processing module 603 is used to obtain the real-time temperature of the touch screen based on the real-time temperature of the N electrodes; the real-time temperature of the touch screen is independent of touch operation.

[0112] In specific implementation, the specific execution process of the above-mentioned acquisition module 601, determination module 602 and processing module 603 can be referred to steps 101 to 103, which will not be elaborated here.

[0113] In a specific implementation, the touch chip may also include a storage module 604, which can be used to store the first effective touch signal quantity D corresponding to N touch electrodes. s Second effective touch signal quantity D m First temperature change rate T s and the second temperature change rate T m .

[0114] In specific implementation, the modules / units included in the various devices and products described in the above embodiments can be software modules / units, hardware modules / units, or a combination of both.

[0115] For example, for various devices and products applied to or integrated into a chip, each module / unit can be implemented using hardware methods such as circuits, or at least some modules / units can be implemented using software programs that run on a processor integrated within the chip, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits; for various devices and products applied to or integrated into a chip module, each module / unit can be implemented using hardware methods such as circuits, and different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or different components of the chip module, or at least some modules / units can be implemented using hardware methods such as circuits. The components can be implemented using software programs that run on the processor integrated within the chip module. The remaining (if any) modules / units can be implemented using hardware methods such as circuits. For various devices and products applied to or integrated into the terminal, each of its components / units can be implemented using hardware methods such as circuits. Different modules / units can be located in the same component (e.g., chip, circuit module, etc.) or in different components within the terminal. Alternatively, at least some modules / units can be implemented using software programs that run on the processor integrated within the terminal, while the remaining (if any) modules / units can be implemented using hardware methods such as circuits.

[0116] This invention also provides a computer-readable storage medium, which is a non-volatile or non-transient storage medium, storing a computer program thereon. When the computer program is run by a processor, it executes the steps of the touchscreen temperature detection method provided in any of the above embodiments.

[0117] This invention also provides a touch device, including a touch electrode and a touch chip, wherein the touch electrode and the touch chip are connected, and the touch chip performs the steps of the touch screen temperature detection method provided in the above embodiments.

[0118] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include ROM, RAM, disk, or optical disk, etc.

[0119] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A method of touch screen temperature detection, the method comprising: The method comprises the following steps: obtaining first type of capacitance signal quantity and second type of capacitance signal quantity corresponding to N touch electrodes in a touch screen; the first type of capacitance signal quantity comprises first effective touch signal quantity and first capacitance change quantity, and the second type of capacitance signal quantity comprises second effective touch signal quantity and second capacitance change quantity; the first effective touch signal quantity and the second effective touch signal quantity are associated with touch operation; the first capacitance change quantity and the second capacitance change quantity are associated with real-time temperature of the touch electrodes; N is a positive integer and N≥2, and the N touch electrodes are distributed in different regions of the touch screen; determining real-time temperature of the N touch electrodes based on the first type of capacitance signal quantity and the second type of capacitance signal quantity corresponding to the N touch electrodes; obtaining real-time temperature of the touch screen based on the real-time temperature of the N touch electrodes; the real-time temperature of the touch screen is irrelevant to touch operation.

2. The touch screen temperature detection method of claim 1, wherein, The first type of capacitive signal amount of the i-th touch electrode in the N touch electrodes is S: S=D s +ΔC s The second type of capacitive signal amount of the i-th touch electrode is M: M=D m +ΔC m Wherein: D s is the first effective touch signal amount, D m is the second effective touch signal amount; ΔC s is the first capacitive change amount, and ΔC s =X×T s ; ΔC m is the second capacitive change amount, and ΔC m =X×T m , X is the real-time temperature of the touch electrode in the touch area; T s is the first temperature change rate, T m is the second temperature change rate, T s is the same as the sign of D s , T m is opposite to the sign of D m ; or, when T s is opposite to the sign of D s , T m is the same as the sign of D m .

3. The touch screen temperature detection method of claim 2, wherein, The method of determining the real-time temperature of the N touch electrodes based on the first type of capacitance signal quantity and the second type of capacitance signal quantity corresponding to the N touch electrodes comprises the following steps: determining real-time temperature of the ith touch electrode based on S and M; i is a positive integer and 1≤i≤N.

4. The touch screen temperature detection method of claim 3, wherein, The real-time temperature X of the ith touch electrode is determined by the following formula: X = (aS + bM) / (aT + bT); wherein S is a first type of capacitance signal amount corresponding to the ith touch electrode at the real-time temperature X, M is a second type of capacitance signal amount corresponding to the ith touch electrode at the real-time temperature X; a is a first coefficient, b is a second coefficient, and aD + bD = 0 is satisfied. s m s m ​​​​ 5. The touch screen temperature detection method of claim 2, wherein, The first temperature change rate T s satisfies: T s = (S2-S1) / (X2-X1); the second temperature change rate T m satisfies: T m = (M2-M1) / (X2-X1); wherein S1 is the first type of capacitive signal amount of the i-th touch electrode at the first temperature X1, S2 is the first type of capacitive signal amount of the i-th touch electrode at the second temperature X2; M1 is the second type of capacitive signal amount of the i-th touch electrode at the first temperature X1, and M2 is the second type of capacitive signal amount of the i-th touch electrode at the second temperature X2.

6. The touch screen temperature detection method of claim 1, wherein, The method of obtaining the real-time temperature of the touch screen based on the real-time temperature of the N touch electrodes comprises the following steps: obtaining real-time temperature of different regions on the touch screen body based on the real-time temperature of the N touch electrodes.

7. The touch screen temperature detection method of claim 6, wherein, The method of obtaining the real-time temperature of different regions on the touch screen body based on the real-time temperature of the N touch electrodes comprises the following steps: constructing a temperature distribution matrix based on the real-time temperature of the N touch electrodes; the ith element in the temperature distribution matrix is the real-time temperature of the ith touch electrode in the touch screen.

8. The touch screen temperature detection method of claim 7, wherein, The N touch electrodes comprise at least one driving electrode and at least one receiving electrode; the method of obtaining the real-time temperature of different regions on the touch screen body based on the real-time temperature of the N touch electrodes comprises the following steps: obtaining temperature of all intersection nodes based on the real-time temperature of the N touch electrodes; the intersection node is the intersection of one driving electrode and one receiving electrode; constructing a temperature distribution matrix based on the temperature of all intersection nodes; the element in the ith row and the jth column in the temperature distribution matrix is the real-time temperature of the intersection node in the ith row and the jth column in the touch screen body.

9. The method of claim 1-8, wherein The first type of capacitance signal quantity is self-capacitance signal quantity, and the second type of capacitance signal quantity is mutual-capacitance signal quantity.

10. A touch chip, comprising: The method comprises the following steps: an obtaining module is configured to obtain first type of capacitance signal quantity and second type of capacitance signal quantity corresponding to N touch electrodes in a touch screen; the first type of capacitance signal quantity comprises first effective touch signal quantity and first capacitance change quantity, and the second type of capacitance signal quantity comprises second effective touch signal quantity and second capacitance change quantity; the first effective touch signal quantity and the second effective touch signal quantity are associated with touch operation; the first capacitance change quantity and the second capacitance change quantity are associated with real-time temperature of the touch electrodes; N is a positive integer and N≥2, and the N touch electrodes are distributed in different regions of the touch screen; determining module, configured to determine real-time temperatures of the N touch electrodes based on the first type of capacitance signal quantity and the second type of capacitance signal quantity corresponding to the N touch electrodes; processing module, configured to acquire a real-time temperature of the touch screen based on the real-time temperatures of the N touch electrodes; the real-time temperature of the touch screen is irrelevant to a touch operation. 11.The touch chip of claim 10, wherein, Further comprising: a storage module, wherein a first effective touch signal amount D corresponding to the i-th touch electrode is stored s , a second effective touch signal amount D m , a first temperature change rate T s , and a second temperature change rate T m ; the D s , D m , T s , T m are used to determine a real-time temperature of the i touch electrodes; i is a positive integer and 1≤i≤N.

12. A touch device comprising a touch electrode and a touch chip connected, characterized in that, the touch chip executes steps of the touch screen temperature detection method in any one of claims 1 to 9.

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