TWI484394B - Touch device and operating method thereof - Google Patents

Description

Touch device and its operation method

The present invention relates to a touch device and a method for operating the same, and more particularly to a touch device capable of automatically re-measuring a reference value of a data and a method for operating the same.

With the rapid development and application of information technology, wireless mobile communication and information appliances, in order to achieve portability, compactness and user-friendly operation, many electronic devices have been converted to use by traditional keyboard or mouse input devices. A touch panel is used as an input device. The current touch panel can be roughly divided into a capacitive touch panel and a resistive touch panel. The capacitive touch panel has a better sensing effect, and thus has become the mainstream of the current touch panel.

The capacitive touch panel changes the capacitance value of the touch panel by approaching or touching the touch panel via a finger or a conductor material, so that the touch point of the capacitive touch panel can be determined by the change of the capacitance value. Generally, when the electronic device is turned on, the touch device initializes the capacitive touch panel. At this time, the touch device considers that the capacitive touch panel is in a non-touch state, and records the plurality of touch data of the capacitive touch panel as a reference value for determining the change of the capacitance value.

However, when the capacitive touch panel is initialized, the capacitive touch panel is close to or attached with a conductive material (such as water or metal), and the data reference value recorded by the touch device may cause misjudgment of the touch point. Or when the touch device When the usage environment changes greatly (such as a large temperature change), the capacitance value of the capacitive touch panel will rise or fall with temperature, so that the touch device will misjudge the touch point of the capacitive touch panel.

The present invention provides a touch device and a method for operating the same, and when a plurality of detected touch data are abnormal, the plurality of data reference values of the touch panel are re-measured to avoid misjudgment of the touch point.

The invention provides a touch device, which comprises a touch panel and a touch detection unit. The touch panel has a plurality of row electrodes and a plurality of column electrodes, and the row electrodes are interleaved with the column electrodes to form a plurality of touch regions. The touch detection unit is coupled to the touch control panel to measure and set a plurality of data reference values of the touch panel during an initializing operation. The touch detection unit obtains a plurality of touch data of the touch panel after scanning the touch panel, and calculates a plurality of touch values according to the data reference values and the touch data, and detects one according to the touch values. Touch point. Moreover, after the touch data meets a re-measurement condition, the touch detection unit re-measures and sets the data reference values of the touch panel.

The invention also provides a method for operating a touch device, which comprises the following steps. When an initializing operation is performed on a touch panel, a plurality of data reference values of the touch panel are measured and set. After scanning the touch panel, multiple touch data of the touch panel are obtained. Based on the data reference values and the touch data, a plurality of touch values corresponding to the touch panel are calculated. A touch point is detected based on the touch values. When these touch data meet a re-measurement condition, Newly measure and set these data reference values for the touch panel.

In an embodiment of the present invention, when the touch panel is driven by a self-capacitance positioning method, the data reference values are a plurality of row electrodes corresponding to the plurality of row electrodes and the plurality of column electrodes of the touch panel during the initializing operation. value.

In an embodiment of the present invention, the re-measurement condition is that at least one of the touch data is less than or equal to a corresponding data reference value minus a re-measurement threshold value and lasts for n picture periods, where n is one Positive number and greater than or equal to 10.

In one embodiment of the present invention, when the touch panel is driven in a mutual capacitive positioning manner, the data reference values are a plurality of capacitance values corresponding to the plurality of touch regions of the touch panel during the initializing operation.

In an embodiment of the present invention, the re-measurement condition is that at least one of the touch data is greater than or equal to a sum of the corresponding data reference value and the re-measurement threshold and lasts for n picture periods.

In an embodiment of the present invention, the re-measurement condition is that the touch data rises or falls along the time, and at least one of the touch data is greater than or equal to a sum or less than or equal to a sum of the corresponding data reference value and the re-measurement threshold. The corresponding data reference value is subtracted from the difference of the re-measurement threshold and continues for n picture periods.

In an embodiment of the present invention, the re-measurement condition is that when the touch panel is driven by one of a self-capacitance positioning mode and a mutual capacitance positioning mode, the touch point is detected according to the touch values, and the touch is detected. When the panel is driven by one of the self-capacitance positioning mode and the mutual capacitance positioning mode, the touch point is not detected according to the touch values.

Based on the above, the touch device and the method for operating the same according to the embodiment of the present invention re-measure the data reference value of the touch panel when the touch data meets the re-measurement condition to avoid an incorrect data reference value or inappropriate data. The reference value causes a misjudgment of the touch point.

The above described features and advantages of the present invention will be more apparent from the following description.

FIG. 1 is a schematic diagram of a system of a touch device according to an embodiment of the invention. Referring to FIG. 1 , in the embodiment, the touch device 100 includes a touch panel 110 and a touch detection unit 120 . The touch panel 110 is exemplified by a projected capacitive touch panel, that is, the touch panel 110 has a plurality of row electrodes 111_1 111 111_x and a plurality of column electrodes 113_1 113 113_y, and the row electrodes 111_1 and the column electrodes 113_1 113 113_y A plurality of touch regions 115 are formed by staggering, wherein x and y are a positive integer.

The touch detection unit 120 is coupled to the touch panel 110. When the touch device 100 performs the initializing operation, the touch detection unit 120 determines that the touch panel 110 is not touched. At this time, the touch detection unit 120 measures and sets a plurality of data reference values of the touch panel 110. DB. After the data reference value DB is set, the touch detection unit 120 can scan the touch panel 110 to obtain the plurality of touch data DTT of the touch panel 110. The data reference value DB is the same as the measurement method (ie, the detection mode) of the touch data DTT, and the data reference value DB is the data obtained by performing the initialization operation of the touch panel 110, and the touch data DTT is the touch data. After the panel 110 is initialized, the obtained data.

Then, the touch detection unit 120 can calculate a plurality of touch values according to the data reference value DB and the touch data DTT, and detect the touch point TP on the touch panel 110 according to the calculated touch value. . Moreover, after the touch data DTT meets a re-measurement condition, the touch detection unit 120 re-measures and sets the data reference value DB of the touch panel 110. The re-measurement condition is that the touch data detected by the touch detection unit 120 is abnormal (such as a large rise or fall, an overall rise or fall) and continues for n screen periods, where n can be set to It is greater than or equal to 10, but the embodiment of the present invention is not limited thereto. Moreover, the above-mentioned setting for the period of n screens is caused by the fact that the abnormality of the touch data DTT is caused by noise, or the erroneous data reference value DB or the inappropriate data reference value DB.

2 is a schematic diagram of data reference values, touch data, and touch values of the touch panel of FIG. 1 driven by a self-capacitance positioning method according to an embodiment of the invention. Referring to FIG. 1 and FIG. 2, in the embodiment, the touch panel 110 is driven by a self-capacitance positioning method, that is, the touch detection unit 120 detects the row electrodes 111_1~111_x and the column electrodes 113_1~, respectively. The capacitance value of 113_y. In addition, the x is, for example, 15 and y is 9, for example, and the touch detection unit 120 uses the capacitance values of the row electrodes 111_1 111 111_15 and the column electrodes 113_1 113 113_9 detected by the initialization operation as the data reference value DB_S. It is shown in Figure 2.

When the touch detection unit 120 drives the touch panel 110 in a self-capacitive positioning manner, the touches of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 The control data (such as DTT_1) is generally greater than or equal to the corresponding data reference value DB_S. The touch values (such as VP_1) of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 are generally represented by positive values, that is, the touch detection unit 120 will be the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9. The touch data (such as DTT_1) is subtracted from the corresponding data reference value DB_S to obtain a corresponding touch value (such as VP_1).

However, if the touch panel 110 approaches or adheres to the conductive material during the initialization period, the partial data reference value DB_S recorded by the touch detection unit 120 may become high due to the influence of the conductive material. Moreover, when the conductive material is away from the touch panel 110 or is detached from the touch panel 110, the touch data (such as DTT_1) of the partial row electrodes 111_1~111_15 and the partial column electrodes 113_1~113_9 may be less than or equal to the corresponding data. The reference value DB_S.

Since the touch behavior causes the touch data (such as DTT_1) of the partial row electrodes 111_1~111_15 and the part of the column electrodes 113_1~113_9 to rise sharply, the touch data of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 ( If the DTT_1 is affected by the conductive material and the decrease is low, the touch detection unit 120 can ignore and not respond to the influence of the falling of the touch data (such as DTT_1). However, when the falling of the touch data (such as DTT_1) of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 is high, the touch detection unit 120 may determine the accuracy of the touch point TP. The data reference values DB_S of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 are re-measured to eliminate the influence of the above-mentioned touch data (such as DTT_1) falling. According to the above, the embodiment can set a re-measurement threshold to determine whether to perform the re-quantity of the data reference value DB_S. The re-measurement of the data reference value DB_S is generally performed during the period in which the touch panel 110 is not touched.

In the present embodiment, the threshold value is re-measured by taking 20 as an example. As shown in the diagonal grid of FIG. 2, the touch data DTT_1 of the row electrodes 111_7~111_10 and the column electrodes 113_1~113_3 is smaller than the corresponding data reference value DB_S. The touch data DTT_1 of the row electrode 111_8 and the column electrode 113_2 is smaller than the difference between the corresponding data reference value DB_S minus the re-measurement threshold value, that is, the touch data of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9. At least one of the DTT_1 is less than or equal to the difference between the corresponding data reference value DB_S minus the re-measurement threshold.

Then, when at least one of the touch data DTT_1 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 is less than or equal to the corresponding data reference value DB_S minus the difference of the re-measurement threshold value and lasts for n picture periods, The touch detection unit 120 re-measures the data reference values DB_S of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 to avoid misjudgment of the touch point TP due to the erroneous data reference value DB_S.

In an embodiment of the invention, the touch value VP_1 is set to be a negative value, that is, when the touch data DTT_1 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 is smaller than the corresponding data reference value DB_S, the touch value VP_1 Can be a negative value (as shown by the slashed square in Figure 2). Moreover, the touch detection unit 120 can determine whether to re-measure the row electrode according to the touch values VP_1 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9. The data reference value DB_S of 111_1~111_15 and the column electrodes 113_1~113_9. In other words, when the absolute value of at least one of the negative values of the touch values VP_1 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 is greater than or equal to the re-measurement threshold and lasts for n screen periods, the touch detection is performed. The unit 120 re-measures the data reference values DB_S of the row electrodes 111_1 to 111_15 and the column electrodes 113_1 to 113_9.

3 is a schematic diagram of data reference values, touch data, and touch values of the touch panel of FIG. 1 driven by a self-capacitance positioning method according to another embodiment of the present invention. Referring to FIG. 1 and FIG. 3 , in the embodiment, the touch panel 110 is driven by a self-capacitance positioning method, and x is, for example, 15, y is 9, for example, and the row electrodes 111_1 - 111_15 and the column electrodes are used. The reference data DB_S, the touch data DTT_2, the DTT_3 and the touch values VP_2 and VP_3 of the 113_1~113_9 can be referred to FIG. 3, wherein the detection time of the touch data DTT_2 is earlier than the detection time of the touch data DTT_3. That is, the time corresponding to the touch value VP_2 is earlier than the time corresponding to the touch value VP_3.

Since the touch data (such as DTT_2, DTT_3) of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 are affected by the ambient temperature, the touch data of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 (such as DTT_2) , DTT_3) When the ambient temperature changes, it may rise along the whole time or decrease overall. In addition, when the touch data (such as DTT_2, DTT_3) of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 rises too much or the falling amplitude is too high, the touch detection unit 120 may misjudge the touch panel 110. Touch point TP, at this time, the row electrodes 111_1~111_15 and the column electrodes can be re-measured The data reference value DB_S of 113_1~113_9 is used to eliminate the influence that the above touch data (such as DTT_2, DTT_3) is too high or too high. Here, in this embodiment, a re-measurement threshold may be set to determine whether to perform re-measurement of the data reference value DB_S, and the re-measurement of the data reference value DB_S is generally performed on the untouched screen of the touch panel 110. period.

In the present embodiment, the re-measurement threshold is set to 20. The touch data DTT_3 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 shown in FIG. 3 are higher than the touch data DTT_2, that is, the touch data of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 (such as DTT_2). , DTT_3) all rise along the time. Moreover, the touch data DTT_3 of the row electrodes 111_2, 111_10, 111_12 and the column electrodes 113_4, 113_7 is greater than or equal to the sum of the corresponding data reference value DB_S and the above-mentioned re-measurement threshold (refer to the diagonal grid shown in FIG. 3), that is, At least one of the touch data DTT_3 indicating the row electrodes 111_1 111 111_15 and the column electrodes 113_1 113 113_9 is greater than or equal to the sum of the corresponding data reference value DB_S and the re-measurement threshold.

Then, when the touch data (such as DTT_2, DTT_3) of the electrodes 111_1~111_15 and the column electrodes 113_1~113_9 rises along the whole time, at least one of the touch data DTT_3 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 When the sum of the corresponding data reference value DB_S and the re-measurement threshold is greater than or equal to n screen periods, the touch detection unit 120 re-measures the data reference values DB_S of the row electrodes 111_1 111 111_15 and the column electrodes 113_1 113 113_9 To avoid exposure to ambient temperature The touch data (such as DTT_2, DTT_3) that rises along the time due to the influence of the degree of change causes the misjudgment of the touch point TP.

In an embodiment of the invention, the touch detection unit 120 can determine whether to re-measure the row electrodes 111_1~111_15 and the column electrodes 113_1~ according to the touch values VP_2 and VP3 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9. The data reference value DB_S of 113_9. In other words, when the touch values VP_3 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 are greater than at least one of the touch value VP2, the row electrodes 111_1~111_15, and the touch values VP_3 of the column electrodes 113_1~113_9 are greater than or equal to When the threshold value is re-measured and continues for n screen periods, the touch detection unit 120 re-measures the data reference values DB_S of the row electrodes 111_1 111 111_15 and the column electrodes 113_1 113 113_9.

4 is a schematic diagram of data reference values, touch data, and touch values of the touch panel of FIG. 1 driven by a self-capacitance positioning method according to still another embodiment of the present invention. Referring to FIG. 1 and FIG. 4 , in the embodiment, the touch panel 110 is driven by a self-capacitance positioning method, and x is, for example, 15, y is 9, for example, and the row electrodes 111_1 - 111_15 and the column electrodes are used. The data reference value DB_S, touch data DTT_2, DTT_4 and touch values VP_2 and VP_4 of 113_1~113_9 can be referred to FIG. 4, wherein the detection time of the touch data DTT_2 is earlier than the detection time of the touch data DTT_4. That is, the time corresponding to the touch value VP_2 is earlier than the time corresponding to the touch value VP_4. Moreover, according to the embodiment of FIG. 3, the embodiment may correspondingly set a re-measurement threshold to determine whether to perform re-measurement of the data reference value DB_S, and the re-measurement of the data reference value DB_S is generally performed on the touch. Control panel 110 is not touched during the screen.

In the present embodiment, the re-measurement threshold is set to 20. The touch data DTT_4 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 shown in FIG. 4 are lower than the touch data DTT_2, that is, the touch data of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 (such as DTT_2). , DTT_3) all decreased along the time. Moreover, the touch data DTT_4 of the row electrodes 111_13, 111_14 and the column electrodes 113_5, 113_7, 113_9 is less than or equal to the difference between the corresponding data reference value DB_S minus the re-measurement threshold (refer to the diagonal grid shown in FIG. 4) That is, at least one of the touch data DTT_4 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 is less than or equal to the difference between the corresponding data reference value DB_S minus the re-measurement threshold.

Then, when the touch data (such as DTT_2, DTT_4) of the electrodes 111_1~111_15 and the column electrodes 113_1~113_9 are all decreased along the time, at least one of the touch electrodes DTT_4 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 When less than or equal to the corresponding data reference value DB_S minus the difference of the re-measurement threshold value and lasts for n screen periods, the touch detection unit 120 re-measures the data reference of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 The value of DB_S is to avoid the misjudgment of the touch point TP caused by the touch data (such as DTT_2, DTT_4) which decreases due to the influence of the ambient temperature fluctuation.

In an embodiment of the invention, the touch detection unit 120 can determine whether to re-measure the row electrodes 111_1~111_15 and the column electrodes according to the touch values VP_2 and VP_4 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9. The data reference value DB_S of 113_1~113_9. In other words, when the touch values VP_4 of the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 are smaller than at least the negative value of the touch value VP2 of the touch value VP2, the row electrodes 111_1~111_15 and the column electrodes 113_1~113_9 When the absolute value of one of the absolute values is greater than or equal to the re-measurement threshold and continues for n screen periods, the touch detection unit 120 re-measures the data reference values DB_S of the row electrodes 111_1 111 111_15 and the column electrodes 113_1 113 113_9.

FIG. 5 is a schematic diagram of data reference values driven by the touch panel of FIG. 1 in a mutual capacitive positioning manner according to an embodiment of the invention. 6A and 6B are schematic diagrams showing touch data and touch values of the touch panel of FIG. 1 driven by mutual capacitive positioning according to an embodiment of the invention. Referring to FIG. 1 , FIG. 5 , FIG. 6A and FIG. 6B , in the embodiment, the touch panel 110 is driven by a mutual capacitive positioning manner, that is, the touch detection unit 120 transmits the row electrodes 111_1 111 111_x and The column electrodes 113_1~113_y detect the capacitance value of the touch area 115. For example, the touch detection unit 120 uses the capacitance value of the touch area 115 detected by the initialization operation as the data reference value DB (as shown in FIG. 5).

When the touch detection unit 120 drives the touch panel 110 in a mutual capacitive positioning manner, the touch data DTT of the touch area 115 (as shown in FIG. 6A) is generally less than or equal to the corresponding data reference value DB (FIG. 5). Shown). The touch value of the touch area 115 (as shown in FIG. 6B ) is generally represented by a positive value, that is, the touch detection unit 120 can set the data reference value DB of the touch area 115 (as shown in FIG. 5 ). Subtract the corresponding touch data DTT (as shown in Figure 6A).

Moreover, if the touch panel 110 approaches or adheres to the conductive material during the initialization period, the touch detection unit 120 may record the wrong data reference value DB (as shown in FIG. 5), so that the touch detection may be affected. The measuring unit 120 determines the accuracy of the touch point TP. At this time, according to the embodiment of FIG. 2, the embodiment may correspondingly set a re-measurement threshold to determine whether to perform re-measurement of the data reference value DB (as shown in FIG. 5), and the data reference value DB ( The re-measurement shown in FIG. 5 is generally performed during the period in which the touch panel 110 is not touched.

In the present embodiment, the re-measurement threshold is set to 20. As shown by the diagonal grid in FIG. 6A, under the influence of the conductive material, the touch data DTT of the partial touch area 115 is greater than or equal to the corresponding data reference value DB (as shown in FIG. 5). The touch data DTT (shown in FIG. 6A ) of the touch area 115A is greater than the sum of the corresponding data reference value DTT (shown as FIG. 5 ) and the re-measurement threshold, that is, the touch of the touch area 115 . At least one of the control data DTT (as shown in FIG. 6A) is greater than or equal to the sum of the corresponding data reference value DB (as shown in FIG. 5) and the above-described re-measurement threshold.

Then, at least one of the touch data DTT (shown in FIG. 6A ) of the touch area 115 is greater than or equal to the sum of the corresponding data reference value DB (as shown in FIG. 5 ) and the re-measurement threshold value, and continues to be n. During the screen period, the touch detection unit 120 re-measures the data reference value DB of the touch area 115 (as shown in FIG. 5) to avoid misjudgment of the touch point TP due to the erroneous data reference value DB.

In an embodiment of the invention, the touch value (as shown in FIG. 6B) is set. It is determined to be a negative value, that is, when the touch data DTT of the touch area 115 (as shown in FIG. 6A) is larger than the corresponding data reference value DB (as shown in FIG. 5), the touch value is as shown in FIG. 6B. ) can be a negative value (as shown by the slashed square in Figure 6B). The touch detection unit 120 can determine whether to re-measure the data reference value DB of the touch area 115 according to the touch value of the touch area 115 (as shown in FIG. 6B ) (as shown in FIG. 5 ). In other words, when the absolute value of at least one of the negative values of the touch value of the touch area 115 (as shown in FIG. 6B ) is greater than or equal to the re-measurement threshold for n screen periods, the touch detection unit 120 The data reference value DB of the touch area 115 is re-measured (as shown in FIG. 5).

7A and 7B are schematic diagrams showing touch data and touch values of the touch panel of FIG. 1 driven by mutual capacitive positioning according to another embodiment of the present invention. 8A and 8B are schematic diagrams showing touch data and touch values of the touch panel of FIG. 1 driven by mutual capacitive positioning according to still another embodiment of the present invention. Referring to FIG. 1 , FIG. 5 , FIG. 7A , FIG. 7B , FIG. 8A and FIG. 8B , in the embodiment, the touch panel 110 is driven in a mutual capacitive positioning manner, and x is, for example, 15, y, for example. 9, wherein the detection time of the touch data DTT shown in FIG. 7A is earlier than the detection time of the touch data DTT shown in FIG. 8A, that is, the time corresponding to the touch value shown in FIG. 7B is earlier than that shown in FIG. 8B. The time corresponding to the touch value.

When the touch data DTT (as shown in FIGS. 7A and 8A ) of the touch area 115 is increased or decreased due to the change of the ambient temperature, the touch detection unit 120 may not correctly determine the touch of the touch panel 110 . Point TP. At this time, according to the embodiment of FIG. 3, the embodiment can be correspondingly set. The threshold value is re-measured to determine whether to perform the re-measurement of the data reference value DB (as shown in FIG. 5), and the re-measurement of the data reference value DB (shown in FIG. 5) is generally performed on the touch panel 110. During the period of the screen that is not touched.

In the present embodiment, the re-measurement threshold is set to 20. The touch data DTT of the touch area 115 shown in FIG. 8A is lower than the touch data DTT of the corresponding touch area 115 shown in FIG. 7A, that is, the touch data DTT of the touch area 115 (see FIGS. 7A and 8A). Shown as a whole). Moreover, the touch data DTT of the part of the touch area 115 is less than or equal to the corresponding data reference value DB (as shown in FIG. 5) minus the difference of the re-measurement threshold (refer to the diagonal square shown in FIG. 8A). That is, at least one of the touch data DTT of the touch area 115 is less than or equal to the difference between the corresponding data reference value DB minus the re-measurement threshold.

Then, when the touch data DTT of the touch area 115 (as shown in FIG. 7A and FIG. 8A ) is decreased along the whole time, at least one of the touch data DTT of the touch area 115 is less than or equal to the corresponding data reference value DB. When the difference between the re-measurement thresholds is subtracted and continues for n screen periods, the touch detection unit 120 re-measures the data reference value DB of the touch area 115 (as shown in FIG. 5) to avoid changes due to ambient temperature. The touch data DTT (as shown in FIG. 7A and FIG. 8A), which is affected by the overall decline in time, causes misjudgment of the touch point TP.

In an embodiment of the present invention, the touch detection unit 120 can determine whether to re-measure the data reference value DB of the touch area 115 according to the touch value of the touch area 115 (as shown in FIG. 7B and FIG. 8B ). As shown in Figure 5). In other words, when the touch value of the touch area 115 shown in FIG. 8B is greater than the touch value of the touch area 115 corresponding to the same touch area 115 in FIG. 7B, at least one of the touch values of the touch area 115 shown in FIG. 8B is greater than or equal to When the threshold value is re-measured and continues for n screen periods, the touch detection unit 120 re-measures the data reference value DB of the touch area 115 (as shown in FIG. 5).

9A and 9B are schematic diagrams showing touch data and touch values of the touch panel of FIG. 1 driven by mutual capacitive positioning according to still another embodiment of the present invention. Referring to FIG. 1 , FIG. 5 , FIG. 7A , FIG. 7B , FIG. 9A and FIG. 9B , in the embodiment, the touch panel 110 is driven in a mutual capacitive positioning manner, and x is, for example, 15, y, for example. The detection time of the touch data DTT shown in FIG. 7A is earlier than the detection time of the touch data DTT shown in FIG. 9A, that is, the time corresponding to the touch value shown in FIG. 7B is earlier than that shown in FIG. 9B. The time corresponding to the touch value. In addition, according to the embodiment of FIG. 5, FIG. 7A, FIG. 7B, FIG. 8A and FIG. 8B, the embodiment can correspondingly set a re-measurement threshold to determine whether to perform the data reference value DB (as shown in FIG. 5). The re-measurement of the data reference value DB (shown in FIG. 5) is generally performed during the period in which the touch panel 110 is not touched.

In the present embodiment, the re-measurement threshold is set to 20. As shown in FIG. 9A, the touch data DTT of the touch area 115 is higher than the touch data DTT of the corresponding touch area 115 shown in FIG. 7A, that is, the touch data DTT of the touch area 115 (such as 7A and 9A). Shown as a whole). Moreover, the touch data DTT of the part of the touch area 115 is greater than or equal to the sum of the corresponding data reference value DB (as shown in FIG. 5) and the re-measurement threshold (refer to the diagonal square shown in FIG. 9A), that is, Touch area 115 At least one of the touch data DTT is greater than or equal to the sum of the corresponding data reference value DB and the re-measurement threshold.

Then, when the touch data DTT of the touch area 115 (as shown in 7A and 9A) rises along the whole time, at least one of the touch data DTT of the touch area 115 is greater than or equal to the corresponding data reference value DB and re When the sum of the threshold values is measured and continues for n screen periods, the touch detection unit 120 re-measures the data reference value DB of the touch area 115 (as shown in FIG. 5) to avoid the influence of environmental temperature fluctuations. The touch data DTT (as shown in 7A and 9A) with an overall increase in time leads to misjudgment of the touch point TP.

In an embodiment of the present invention, the touch detection unit 120 can determine whether to re-measure the data reference value DB of the touch area 115 according to the touch value of the touch area 115 (as shown by 7B and 9B). 5)). In other words, the touch value of the touch area 115 shown in FIG. 9B is smaller than the touch value corresponding to the same touch area 115 in FIG. 7B and the negative value of the touch value of the touch area 115 shown in FIG. 9B. When the absolute value of one of the absolute values is greater than or equal to the re-measurement threshold and continues for n screen periods, the touch detection unit 120 re-measures the data reference value DB of each touch area 115 (as shown in FIG. 5).

In addition, in an embodiment of the invention, the touch detection unit 120 alternately drives the touch panel 110 in a self-capacitance positioning manner and a mutual capacitance positioning manner. When the touch detection unit 120 drives the touch panel 110 in a self-capacitance manner, the touch point TP and the touch detection can be detected according to the touch value (ie, the difference between the data reference value DB and the touch data DTT). When the touch panel 110 is incapable of detecting the touch point TP according to the touch value, the unit 120 indicates at least one of the self-capacitance positioning mode and the mutual capacity positioning mode. The data reference value DB (as shown in FIG. 2 and the FIG. 5) causes the touch point TP to be misjudged. Therefore, the touch detection unit 120 can re-measure the data reference value DB corresponding to the touch panel 110. Alternatively, when the touch detection unit 120 is configured to drive the touch panel 110 in a mutual-capacitive positioning manner to detect the touch point TP and drive the touch panel 110 to detect the touch point TP in a self-capacitive positioning manner, The touch detection unit 120 can also re-measure the data reference value DB corresponding to the touch panel 110 (as shown in DB_S and FIG. 5 in FIG. 2).

FIG. 10 is a flow chart of a method of operating a touch device according to an embodiment of the invention. Referring to FIG. 10, in the embodiment, the method for operating the touch device includes the following steps. When the touch panel performs the initializing operation, a plurality of data reference values of the touch panel are measured and set (step S1010). After the touch panel is scanned, the plurality of touch data of the touch panel are obtained (step S1020), and the plurality of touch values corresponding to the touch regions are calculated according to the data reference values and the touch data (step S1030). . Then, the touch point is detected according to the touch values (step S1040). When the touch data meets the re-measurement condition, the data reference values of the touch panel are re-measured and reset (step S1050). The order of the above steps is for illustrative purposes, and the embodiment of the present invention is not limited thereto, and the details of the re-measurement conditions and the above steps may be referred to the above-mentioned FIG. 1 to FIG. 5, FIG. 6A, FIG. 6B, FIG. 7A, and FIG. 7B, FIG. 8A, FIG. 8B, FIG. 9A, FIG. 9B are described in the embodiment, and are not described herein again. Furthermore, if the re-measurement conditions are not met, only steps S1010, S1020, 1030, and S1040 are performed, that is, the re-measurement of the data reference value is not performed.

In summary, the touch device and the method for operating the same according to the embodiment of the present invention re-measure the data reference value of the touch panel when the touch data meets the re-measurement condition to avoid an incorrect data reference value or inappropriate. The data reference value causes misjudgment of the touch point.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧ touch device

110‧‧‧Touch panel

111_1~111_x‧‧‧ row electrode

113_1~113_y‧‧‧ column electrode

115, 115A‧‧‧ touch area

120‧‧‧Touch detection unit

DB, DB_S‧‧‧ data reference value

DTT, DTT_1~DTT_4‧‧‧ Touch data

TP‧‧‧ touch point

VP_1~VP_4‧‧‧ touch value

S1010, S1020, S1030, S1040, S1050‧ ‧ steps

FIG. 1 is a schematic diagram of a system of a touch device according to an embodiment of the invention.

2 is a schematic diagram of data reference values, touch data, and touch values of the touch panel of FIG. 1 driven by a self-capacitance positioning method according to an embodiment of the invention.

3 is a schematic diagram of data reference values, touch data, and touch values of the touch panel of FIG. 1 driven by a self-capacitance positioning method according to another embodiment of the present invention.

4 is a schematic diagram of data reference values, touch data, and touch values of the touch panel of FIG. 1 driven by a self-capacitance positioning method according to still another embodiment of the present invention.

FIG. 5 is a schematic diagram of data reference values driven by the touch panel of FIG. 1 in a mutual capacitive positioning manner according to an embodiment of the invention.

6A and 6B are schematic diagrams showing touch data and touch values of the touch panel of FIG. 1 driven by mutual capacitive positioning according to an embodiment of the invention.

7A and 7B are schematic diagrams showing touch data and touch values of the touch panel of FIG. 1 driven by mutual capacitive positioning according to another embodiment of the present invention.

8A and 8B are schematic diagrams showing touch data and touch values of the touch panel of FIG. 1 driven by mutual capacitive positioning according to still another embodiment of the present invention.

9A and 9B are schematic diagrams showing touch data and touch values of the touch panel of FIG. 1 driven by mutual capacitive positioning according to still another embodiment of the present invention.

FIG. 10 is a flow chart of a method of operating a touch device according to an embodiment of the invention.

S1010, S1020, S1030, S1040, S1050‧ ‧ steps

Claims (16)

A touch device includes: a touch panel having a plurality of row electrodes and a plurality of column electrodes, wherein the row electrodes are interlaced with the column electrodes to form a plurality of touch regions; and a touch detection unit, The touch panel is coupled to measure a plurality of first touch data of the touch panel to set a plurality of data reference values of the touch panel, and obtain the touch after scanning the touch panel a plurality of second touch data of the control panel, and calculating a plurality of touch values according to the data reference values and the second touch data, to detect a touch point according to the touch values, and After the second touch data meets a re-measurement condition, the touch detection unit re-measures and resets the data reference values of the touch panel. The touch device of claim 1, wherein when the touch panel is driven by a self-capacitance positioning method, the data reference values are the row electrodes and the column electrodes during the initializing operation. Corresponding multiple capacitance values. The touch device of claim 2, wherein the re-measurement condition is that at least one of the second touch data is less than or equal to a corresponding data reference value minus a re-measurement threshold value And for n screen periods, where n is a positive number and greater than or equal to 10. The touch device of claim 2, wherein the re-measurement condition is that the second touch data rises or falls along a time, and at least one of the second touch data is greater than or equal to a corresponding one. The sum of the data reference value and a re-measurement threshold or less than or equal to the corresponding data base The quasi value is subtracted from the difference of the re-measurement threshold and lasts for n picture periods, where n is a positive number and greater than or equal to 10. The touch device of claim 1, wherein the data reference value is a plurality of corresponding touch regions in the initializing action when the touch panel is driven in a mutual capacitive positioning manner. Capacitance value. The touch device of claim 5, wherein the re-measurement condition is that at least one of the second touch data is greater than or equal to a sum of the corresponding data reference value and a re-measurement threshold and continues n screen periods, where n is a positive number and greater than or equal to 10. The touch device of claim 5, wherein the re-measurement condition is that the second touch data rises or falls along a time, and at least one of the second touch data is greater than or equal to a corresponding one. The sum of the data reference value and a re-measurement threshold value or less than or equal to the corresponding data reference value minus the re-measurement threshold value and lasts for n screen periods, where n is a positive number and greater than or equal to 10. The touch device of claim 1, wherein the re-measurement condition is that the touch panel is driven by one of a self-capacitance positioning mode and a mutual capacitance positioning mode. The touch detection unit detects the touch point according to the touch values. When the touch panel is driven by the self-capacitive positioning mode and the other of the mutual capacitive positioning modes, the touch detection unit is configured according to the The touch point does not detect the touch point. A method for operating a touch device includes: measuring a plurality of first touch data of the touch panel to set a plurality of data standards of the touch panel when an initializing operation is performed on the touch panel The second touch data of the touch panel is obtained after the touch panel is scanned; and the plurality of touches corresponding to the touch panel are calculated according to the data reference values and the second touch data. And detecting a touch point according to the touch values; and re-measuring and resetting the data reference values of the touch panel when the second touch data meets a re-measurement condition. The method of operating the touch device of claim 9, wherein when the touch panel is driven by a self-capacitance positioning method, the data reference values are a plurality of row electrodes of the touch panel and The plurality of column electrodes correspond to a plurality of capacitance values during the initializing operation. The method for operating a touch device according to claim 10, wherein the re-measurement condition is that at least one of the second touch data is less than or equal to a corresponding data reference value minus a re-measurement threshold The difference is for n screen periods, where n is a positive number and greater than or equal to 10. The method of operating the touch device of claim 10, wherein the re-measurement condition is that the second touch data rises or falls along time, and at least one of the second touch data is greater than And is equal to the sum of the corresponding data reference value and a re-measurement threshold or less than or equal to the corresponding data reference value minus the re-measurement threshold for n screen periods, where n is a positive number and greater than or equal to 10. The operation of the touch device as described in claim 9 The data reference value is a plurality of capacitance values corresponding to the plurality of touch regions of the touch panel during the initializing operation when the touch panel is driven in a mutual capacitive positioning manner. The method for operating a touch device according to claim 13 , wherein the re-measurement condition is that at least one of the second touch data is greater than or equal to a corresponding data reference value and a re-measurement threshold Sum and last n screen periods, where n is a positive number and greater than or equal to 10. The operating method of the touch device of claim 13, wherein the re-measurement condition is that the second touch data rises or falls along time, and at least one of the second touch data is greater than And is equal to the sum of the corresponding data reference value and the second re-measurement threshold or less than or equal to the corresponding data reference value minus the re-measurement threshold for n screen periods, where n is a positive number and greater than or equal to 10. The touch device of claim 9, wherein the re-measurement condition is that the touch panel is driven by one of a self-capacitive positioning mode and a mutual capacitive positioning mode, according to the touch The touch point is detected by the control value. When the touch panel is driven by the self-capacitance positioning mode and the other of the mutual capacitive positioning modes, the touch point is not detected according to the touch values.