TWI610215B - Touch sensitive panel and polarized material detection method using the same - Google Patents

Abstract

A touch panel and a polar substance detecting method using the same. The touch panel includes a plurality of first electrodes and at least one conductive line. The first electrode is disposed on a substrate and is located in an active area for connecting to a first circuit of a touch controller. The conductive wire is disposed on the substrate and is located in a frame region for connecting a second circuit of the touch controller. The sensing method includes the following steps. First, a driving signal is output by one of the first circuit and the second circuit. A sensing capacitance is formed between the conductive line and the first electrode. Then, a sensing signal is received by the other of the first circuit and the second circuit. Then, the sensing signal is compared with a first reference value to determine whether the polar substance covers the frame area and/or the active area.

Description

Touch panel and method for detecting polar substances thereof

The present invention relates to a touch panel and a method for detecting the same, and more particularly to a touch panel for detecting a polar substance and a method for detecting the same.

With the development of touch technology, the number of touch points on the touch panel has increased, and the density of the touch circuit has become complicated. As the density and complexity of the circuit increase, the touch panel is more and more susceptible to noise during touch detection. For example, the signal generated by impurities such as dust or water droplets and water stains may cause errors in the report point, causing poor touch control on the touch panel.

Among the impurities that easily affect the reporting of the touch panel, the shape, size, and position of the liquid are different due to the fluidity of the liquid, and the interference caused by the touch signal is also inconsistent. Therefore, how to effectively remove the liquid covering the touch panel, resulting in distortion and error of the touch signal, is an important subject of touch signal processing.

In general, when the liquid appears on the border of the touch panel, it is negligible because it does not affect the reporting of the active area. In another case, when the liquid only appears in the touch area (active area), a special signal processing mechanism can be used to eliminate the liquid pair. The impact of the touch signal. In another case, when the liquid covers the frame and the active area at the same time, the liquid often affects the touch signal at the edge of the active area, and affects the reporting point at the edge of the active area. Currently, there is no economical and effective processing method to eliminate The effect of liquid in this position on the touch signal.

In view of the above, the touch panel of the present invention and the method for detecting a polar substance thereof are provided with one or more conductive lines in a frame region of the substrate, thereby forming a sensing capacitance between the frame region and the active region, thereby further The detection of polar substances is the coverage of the border area and the active area.

According to an aspect of the invention, a touch panel is provided, which is connected to a touch controller. The touch controller includes a first circuit and a second circuit. The touch panel includes a substrate, a plurality of first electrodes, and at least one conductive line. The substrate has an active area and a frame area surrounding one of the active areas. The first electrode is disposed on the substrate and located in the active region for connecting the first circuit. The conductive wire is disposed on the substrate and located in the frame region, and the conductive wire is disposed to surround the active region for connecting the second circuit. A conductive capacitor is formed between the conductive line and the first electrode to sense whether a polar substance covers the frame area, covers the active area, or covers the frame area and the active area at the same time.

In one embodiment, the active area has four sides, and the touch panel includes a conductive line surrounding the four sides of the active area.

In another embodiment, the active area has four sides, and the touch panel includes a plurality of conductive lines, and each of the conductive lines corresponds to one of the four sides.

In another embodiment, the touch panel further includes a stable potential line disposed on the substrate and located in the frame region. The stable potential line is disposed around the active area, and the conductive line is disposed around the stable potential line, so that the stable potential line is within the range of the sensing capacitance. The conductive line, the first electrode and the stable potential line are used to form a sensing capacitance, thereby sensing whether the polar substance covers both the frame area and the active area.

In another embodiment, the first circuit of the touch panel is a driving circuit, the second circuit is a sensing circuit, the first electrode is a driving electrode, and the conductive line is a sensing electrode. When the conductive line receives a sensing signal through the sensing capacitor to meet a first reference value, the touch controller determines that the polar substance covers the frame area.

In another embodiment, the first circuit of the touch panel is a sensing circuit, and the second circuit is a driving circuit, the first electrode is a sensing electrode, and the conductive line is a driving electrode. When the first electrode receives a sensing signal through the sensing capacitor to meet a first reference value, the touch controller determines that the polar substance covers the active area.

According to another aspect of the present invention, a sensing method of a polar substance is proposed, which is suitable for a touch panel. The touch panel includes a plurality of first electrodes and at least one conductive line. The first electrode is located in an active area on a substrate for connecting to a first circuit of a touch controller. The conductive line is located in a frame area on the substrate, and is disposed around the active area for connecting a second circuit of the touch controller. The sensing method includes the following steps. First, a driving signal is outputted by one of the first circuit and the second circuit, and a sensing capacitance is formed between the conductive line and the first electrode. Then, a sensing signal is received by the other of the first circuit and the second circuit. Then, the sensing signal is compared with a first reference value to determine whether the polar substance covers the frame area, covers the active area, or covers both the frame area and the active area.

In an embodiment, the first circuit is a driving circuit, and the second circuit is a sensing circuit. In the output step, the first circuit outputs a driving signal to the first electrode, and in the receiving step, the sensing signal is transmitted to the second circuit by the conductive line. In the step of comparing the first reference values, when the sensing signal meets the first reference value, it is determined that the polar substance covers the frame area.

In another embodiment, the first circuit is a sensing circuit and the second circuit is a driving circuit. In the output step, the second circuit outputs a driving signal to the conductive line, and in the receiving step, the sensing signal is transmitted from the first electrode to the first circuit. In the step of comparing the first reference values, when the sensing signal meets the first reference value, it is determined that the polar substance covers the active area.

In another embodiment, the touch panel further includes a stable potential line disposed on the substrate and located in the frame region. The stable potential lines are arranged around the active area, and the conductive lines are arranged around the stable potential lines. In the forming step, the range of the sensing capacitance covers the stable potential line. The sensing method further includes an alignment step of comparing the sensing signal with a second reference value. When the sensing signal meets the second reference value, it is determined that the polar substance covers both the frame area and the active area.

In the touch panel of the present invention and the method for detecting a polar substance thereof, at least one conductive line is disposed in a frame region of the substrate, and a sensing capacitor is formed between the frame region of the substrate and the active region to detect whether A polar substance covers both the bezel area and the active area. By detecting the polar substance covering the frame area and/or the active area, it is possible to eliminate the problem that the polar substance covers the edge of the active area, resulting in an error in reporting.

100, 300, 500‧‧‧ touch panels

110, 310, 510‧‧‧ substrates

120‧‧‧Isolation

131, 331, 531‧‧ first electrode

140, 340(a)~(e), 540‧‧‧ conductive lines

200, 400, 600‧‧‧ touch controller

210, 410, 610‧‧‧ first circuit

220, 420, 620‧‧‧ second circuit

550‧‧‧Stabilized potential line

AA‧‧‧active area

BA‧‧‧Border area

E‧‧‧Sense Capacitance

P‧‧‧ polar substances

S10~S40‧‧‧Steps

The above and other features, advantages and embodiments of the present invention will become more apparent and understood. 1 is a schematic view of a touch panel according to an embodiment of the invention; FIG. 2A is a cross-sectional view of the touch panel of FIG. 1 along line A-A'; and FIG. 2B is a diagram showing a polar substance covering 2 is a schematic view of a touch panel according to another embodiment of the present invention; FIG. 4 is a schematic view of a touch panel according to another embodiment of the present invention; 5A is a cross-sectional view of the touch panel of FIG. 4 along line BB′; FIG. 5B is a schematic view showing a polar substance covering the touch panel of FIG. 5A; FIG. 5C is a diagram showing a polar substance Another coverage condition covers a schematic diagram of the touch panel of FIG. 5A; and FIG. 6 is a flow chart of a method for sensing a polar substance according to an embodiment of the invention.

The touch panel of the present invention and the method for detecting a polar substance thereof use the method of disposing at least one conductive line in a frame region of the touch panel, so that a plurality of first electrodes located in the active region are located at the same position A sensing capacitor is formed between at least one of the conductive lines of the bezel area to sense whether a polar substance covers the bezel area and/or the active area. This can eliminate the abnormal touch signals caused by polar substances (such as water stains) covering the frame area or the active area, and improve the accuracy of the touch.

Please refer to FIG. 1 , which is a schematic diagram of a touch panel according to an embodiment of the invention. The touch panel 100 is connected to a touch controller 200. The touch controller 200 includes a first circuit 210 and a second circuit 220. The touch panel 100 includes a substrate 110 , a plurality of first electrodes 131 , and at least one conductive line 140 . The substrate 110 has an active area AA and a frame area BA, A bezel area BA surrounds the active area AA. The plurality of first electrodes 131 are disposed on the substrate 110 and located in the active area AA for connecting the first circuit 210 of the touch controller 200. The at least one conductive line 140 is disposed on the substrate 110 and located in the frame area BA. The conductive line 140 is disposed on the substrate 110 so as to surround the active area AA for connecting the second circuit 220 of the touch controller 200. A sensing capacitor is formed between the conductive line 140 of the touch panel 100 and the first electrode 131. The touch panel 100 senses whether the polar substance covers the frame area BA and/or the active area AA via the sensing capacitor.

In this embodiment, the active area AA of the substrate 110 is rectangular and has four sides. The touch panel 100 includes a conductive line 140 that surrounds four sides of the active area AA. As shown in FIG. 1, the conductive line 140 substantially surrounds the active area AA in accordance with the shape of the active area AA. It should be noted that the conductive line 140 of the present embodiment does not completely cover the active area AA, and the conductive line 140 corresponds to the lower side of the active area AA in FIG. 1 and has a gap for circuit routing. In this embodiment, the gap of the conductive line 140 is used to pass the line connecting the first electrode 131 and the first circuit 210, and also to pass the line connecting the conductive line 140 and the second circuit 220. The arrangement of the circuit traces on the substrate 110 and the first electrodes 131 and the conductive lines 140 are not limited in the present invention; as long as the plurality of first electrodes 131 are located in the active area AA, at least one conductive line is located in the frame area BA and The manner of configuration around the active area AA is within the scope of the present invention.

Please refer to FIG. 1 and FIG. 2A at the same time. FIG. 2A is a cross-sectional view of the touch panel of FIG. 1 along line A-A'. As shown in FIG. 2A , the touch panel 100 further includes an isolation layer 120 disposed on the substrate 110 and covering the first electrode 131 and the conductive line 140 for protecting components in the touch panel 100 (eg, the first electrode). 131 and conductive wire 140 and other components), to avoid moisture or external Impurity effects. As shown in FIG. 2A , a sensing capacitance E is formed between the conductive line 140 of the touch panel 100 and the first electrode 131 . The sensing capacitance E will be described in detail below.

In this embodiment, the first electrode 131 is connected to the first circuit 210 of the touch controller 200, for example, a driving circuit; the conductive line 140 is connected to the second circuit 220 of the touch controller 200, such as a sensing circuit. In other words, in the embodiment, the first circuit 210 of the touch controller 200 outputs a driving signal to the first electrode 131, so that a sensing capacitance E is formed between the first electrode 131 and the conductive line 140, and The second circuit 220 receives the sensing signal via the conductive line 140. In order to detect whether a polar substance (for example, a water stain) is close to the sensing capacitor E, the sensing capacitance E in this embodiment is exemplified by a projection capacitance projected from the first electrode 131 to the conductive line 140.

Please refer to FIG. 2B , which illustrates a schematic diagram of a polar substance covering the touch panel of FIG. 2A . When the polar substance P covers the vicinity of the sensing capacitor E, since the sensing capacitance E is affected by the polar substance P, the sensing signal received by the conductive line 140 is affected. In this way, the touch panel 100 can sense whether the polar substance P exists in the range of the sensing capacitance E by comparing the sensing signal received by the conductive line 140 with a first reference value. When the polar material P covers the frame area BA, the sensing signal received by the conductive line 140 may be affected. Therefore, in the embodiment, the conductive line 140 is used as the receiving end of the sensing capacitor E, and whether the polarity is sensed. The substance P covers the frame area BA.

By comparing the 2A and 2B drawings, in the present embodiment, when the active area AA and the frame area BA of the touch panel 110 are not covered with the polar substance P, the sensing capacitance E is not affected. When the polar substance P covers the active area AA and the frame area BA, the sensing capacitance E is affected, and the intensity of the sensing signal received by the conductive line 140 changes. The touch control circuit 200 can compare the sensing signal received by the conductive line 140 with a first reference value. this The first reference value may be adjusted according to the actual sensing sensitivity of the touch panel 100 or according to the signal value when the sensing capacitor E is affected by a conductive object such as a finger.

Generally, when the finger is closely connected to the sensing capacitor E, the degree of the sensing capacitance E is affected, which is greater than the influence of the polar substance P on the sensing capacitance E. That is, when the finger is closely connected to the sensing capacitor E, the sensing signal received by the conductive line 140 is lower than the sensing signal received by the conductive line 140 when the polar substance P is covered. The first reference value can be adjusted by using different substances (such as a finger or polar substance P) of different touches for different influences of the sensing signals. In the embodiment in which the conductive line 140 is used as the receiving end of the sensing capacitor E, it is determined whether the sensing signal received by the conductive line 140 meets the first reference value, and whether the polar substance P covers the frame area BA can be determined.

The touch panel 100 according to the present embodiment is connected to a touch controller 200 and includes a substrate 110, a plurality of first electrodes 131, and at least one conductive line 140. More specifically, the touch panel 100 may further include a plurality of second electrodes (not shown), and the first electrodes are alternately disposed in the active area AA in a non-contact manner for connecting the touch controller 200. Two circuits 220. In this embodiment, the first electrode 131 is connected to the first circuit 210 of the touch controller 200, for example, a driving circuit; the second electrode and the conductive line 140 are connected to the second circuit 220 of the touch controller 200, for example, Sensing circuit. The sensing capacitance E is a projection capacitance projected by the first electrode 131 to the conductive line 140, thereby determining whether the polar substance P covers the frame area BA. The first electrode 131 and the second electrode are alternately arranged in the active area AA in a non-contact manner for performing touch detection. This part of the technical content is not described in detail in this embodiment.

In a different embodiment, the first circuit 210 of the touch controller 200 is a sensing circuit, and the second circuit 220 is a driving circuit, that is, the first electrode 131 is a sensing electrode, the conductive line 140 and the second electrode. To drive the electrodes. At this time, it is the second circuit 220 of the touch controller 200. The driving signal is outputted to the conductive line 140, so that the sensing capacitance E is formed between the conductive line 140 and the first electrode 131, and the sensing signal is received by the first circuit 210 via the first electrode 131. The sensing capacitance E is a projection capacitance projected from the conductive line 140 (and/or the second electrode) to the first electrode 131, thereby determining whether the polar substance P covers the active area AA. It is determined whether the sensing signal received by the first electrode 131 meets the first reference value, and whether the polar substance P covers the active area AA can be determined.

In the touch panel 100 of the embodiment of the present invention, the first electrode 131 is used as the driving electrode, and the conductive line 140 is used as the receiving end for receiving the sensing signal of the sensing capacitor E. And comparing the sensing signal with the first reference value to determine whether the polar substance P covers the frame area BA. Then, the touch panel 100 can further use the conductive line 140 as a driving electrode, and the first electrode 131 serves as a receiving end for receiving the sensing signal of the sensing capacitor E. And comparing the sensing signal with the first reference value, it has been determined whether the polar substance P covers the active area AA. In this way, the first electrode 131 and the conductive line 140 are successively used as the receiving ends of the sensing capacitor E, and it can be separately determined whether the polar substance covers the frame area BA and covers the active area AA.

Please refer to FIG. 3 , which is a schematic diagram of a touch panel according to another embodiment of the invention. The touch panel 300 is connected to a touch controller 400. The touch controller 400 includes a first circuit 410 and a second circuit 420. The touch panel 300 includes a substrate 310, a plurality of first electrodes 331, and at least one conductive line 340(a)~(e). The substrate 310 has an active area AA and a frame area BA surrounding the active area AA. The plurality of first electrodes 331 are disposed on the substrate 310 and located in the active area AA for connecting the first circuit 410 of the touch controller 400. The conductive lines 340(a) to (e) are disposed on the substrate 310 and are located in the bezel area BA.

The touch panel 300 of the present embodiment is different from the touch panel 100 according to the first embodiment in the number of conductive lines 340 (a) to (e). The touch panel 300 of the embodiment includes multiple guides The wires 340 (a) to (e) are disposed on the substrate 310 so as to surround the active area AA for connecting the second circuit 420 of the touch controller 400. In the embodiment, the active area AA of the touch panel 300 is a rectangle and has four sides. Each of the conductive lines 340(a) to (e) corresponds to one of the four sides of the active area AA; relatively speaking, each side of the active area AA may correspond to the aforementioned conductive line 340 ( At least one of a)~(e). The sensing line 340 (a) to (e) of the touch panel 300 and the first electrode 331 are used to form a sensing capacitance. The touch panel 300 senses whether the polar substance covers the frame area BA or Active area AA.

In the embodiment where the first circuit 410 is a driving circuit, the second circuit 420 can simultaneously receive the sensing signals of all the conductive lines 340(a) to (e) to detect whether the polar substance covers the frame area BA at the same time. In different driving manners, the second circuit 420 can sequentially receive the sensing signals of the conductive lines 340(a) to (e) one by one, and sequentially detect which polar material is covered in the frame area BA correspondingly. The position of line 340 (a) ~ (e). In addition, in addition to determining whether the touch panel 300 is covered with a polar substance, it is further possible to determine which side of the frame area BA is above, below, left, and right.

In the embodiment where the second circuit 420 is a driving circuit, the second circuit 420 can simultaneously provide driving signals to all of the conductive lines 340(a) to (e) at a time to detect whether the polar substance covers the active area AA. In different driving manners, the second circuit 420 can sequentially drive the conductive lines 340(a)-(e) one by one, and receive the sensing signals via the first circuit 410, and further detect that the polar substances are correspondingly close to the coverage. Which one of the first electrodes 331 is located.

In practical applications, the number and arrangement of the conductive lines 340(a) to (e) are not limited to the configuration of FIG. The wiring pattern of the conductive lines 340(a) to (e) connected to the second circuit 420 is not limited to the wiring shown in FIG. The touch panel 300 includes a plurality of conductive lines 340 (a) ~ (e), located in the frame area BA, and configured to surround the active area AA for connecting the second circuit 420, are all within the scope of the embodiments of the present invention.

A conductive capacitance is formed between the conductive lines 340 ( a ) to (e) of the touch panel 300 and the first electrode 331 , and the sensing signal is compared with the first reference value, and the corresponding first FIG. The touch panel 100 and the touch control circuit 200 in FIG. 2B are the same, and the detailed description is not repeated in this embodiment.

Please refer to FIG. 4 , which is a schematic diagram of a touch panel according to still another embodiment of the present invention. The touch panel 500 is connected to a touch controller 600. The touch controller 600 includes a first circuit 610 and a second circuit 620. The touch panel 500 includes a substrate 510 , a plurality of first electrodes 531 , and at least one conductive line 540 . The substrate 510 has an active area AA and a frame area BA surrounding the active area AA. The plurality of first electrodes 531 are disposed on the substrate 510 and are located in the active area AA for connecting the first circuit 610 of the touch controller 600. The at least one conductive line 540 is disposed on the substrate 510 and located in the frame area BA. The conductive line 540 is disposed on the substrate 510 to surround the active area AA for connecting the second circuit 620 of the touch controller 600. A sensing capacitor is formed between the conductive line 540 of the touch panel 500 and the first electrode 531. The touch panel 500 senses whether the polar substance covers the frame area BA and/or the active area AA via the sensing capacitor.

The touch panel 500 of the present embodiment is different from the touch panel 100 of the first embodiment in that the touch panel 500 of the present embodiment further includes a stable potential line 550 disposed on the substrate 510 and located in the frame area BA. in. The stable potential line 550 is disposed around the active area AA, and the conductive line 540 is disposed around the stable potential line 550, so that the stable potential line 550 is located within the range of the sensing capacitance. In this embodiment, the stable potential line 550 can be a ground line, for example It is grounded via the touch controller 600. In different embodiments, the stable potential line 550 can also be grounded via the touch panel 500, or simply represented as a wire connected to a stable potential.

Please refer to FIG. 4 and FIG. 5A simultaneously. FIG. 5A is a cross-sectional view of the touch panel of FIG. 4 along line B-B'. As shown in FIG. 5A, a sensing capacitor E is formed between the conductive line 540 of the touch panel 500 and the first electrode 531. The stable potential line 550 is disposed on the substrate 510 and located in the frame area BA while stabilizing the potential line. The 550 is located within the range of the sensing capacitance E. In this embodiment, the first electrode 531 is connected to the first circuit 610 of the touch controller 600, for example, a driving circuit; the conductive line 540 is connected to the second circuit 620 of the touch controller 600, such as a sensing circuit. In other words, in the embodiment, the first circuit 610 of the touch controller 600 outputs a driving signal to the first electrode 531, so that a sensing capacitance E is formed between the first electrode 531 and the conductive line 540, and The sensing signal is received by the second circuit 620 via the conductive line 540. In order to detect whether a polar substance (for example, a water stain) is close to the sensing capacitor E, the sensing capacitance E in the embodiment is described by taking a projection capacitance projected from the first electrode 531 to the conductive line 540 as an example. In the present embodiment, when there is no polar substance P covered, most of the power lines are projected to the stable potential line 550 which is closer to the first electrode 531.

Please refer to FIG. 5B , which illustrates a schematic diagram of a polar substance covering the touch panel of FIG. 5A . In the case of FIG. 5B, the polar substance P covers both the active area AA and the frame area BA. Most of the power lines emitted by the first electrode 531 are projected to the conductive lines 540 via the polar substance P. Since the touch panel 500 of the present embodiment further sets the stable potential line 550 in the frame area BA, and the stable potential line 550 is closer to the first electrode 531, a small portion of the power line is still projected to the stable potential line 550. It can be seen from FIG. 5A and FIG. 5B that the size of the signal received by the conductive line 540 changes, and it can be determined whether the polar substance P covers the frame area BA at the same time. Active area AA. In practical applications, the sensing signal received by the conductive line 540 can be compared with a second reference value. When the sensing signal meets the second reference value, the polar substance P is simultaneously covered in the active area AA and the border area BA. . The second reference value can be adjusted according to the actual sensing sensitivity requirement of the touch panel 500. In this embodiment, the second reference value is substantially the same as the first reference value. The technical content of the part is the same as the touch panel 100 and the touch as shown in FIGS. 1 to 2B. The controller 200 is similar and will not be repeated here.

Please refer to FIG. 5C , which illustrates a schematic diagram of a polar material covering the touch panel of FIG. 5A in another coverage condition. In the present embodiment, the sensing capacitance E is an example of a projection capacitance projected from the first electrode 531 to the conductive line 540. When the polar substance P substantially covers the frame area BA, the first electrode 531 is emitted to the conductive line. The sensing capacitance E of 540, wherein the potential line is mostly projected to a stable potential line 550 that is closer to the first electrode 531, and a small portion of the potential line is projected to the conductive line 540 via the polar substance P. Compared to FIG. 5A, the sensing signal received by the conductive line 540 changes. Since the polar substance P is distributed to the frame area BA and is affected by the stable potential line 550 which is closer to the first electrode 531, the value of the sensing signal received by the conductive line 540 is lower than that of the polar substance P in FIG. 5B. At the same time, the values are distributed in the active area AA and the frame area BA. In the case where the stable potential line 550 is present, the sensing signal does not conform to the aforementioned second reference value. In practical applications, the sensing signal can be compared with a third reference value. When the sensing signal received by the conductive line 540 meets the third reference value, the polar substance P does not cover the active area AA and the border at the same time. The area BA; in other words, the polar substance P substantially covers one of the active area AA or the frame area BA (in the embodiment, the cover area BA is substantially covered). In this embodiment, the first reference value is substantially equal to the second reference value, and the third reference value is smaller than the first reference value and the second reference value.

In a different embodiment, the second circuit 620 of the touch controller 600 outputs a driving signal to the conductive line 540, thereby forming a sensing capacitance E between the conductive line 540 and the first electrode 531, and A circuit 610 receives the sensing signal via the first electrode 531. That is, the sensing capacitance E is a projection capacitance projected from the conductive line 540 to the first electrode 531, and the projected capacitance covers a range of the stable potential line 550. In such an embodiment, the first circuit 610 is a sensing circuit and the second circuit 620 is a driving circuit. When the sensing signal meets the second reference value, it is determined that the polar substance P covers the active area AA and the frame area BA at the same time; when the sensing signal does not meet the second reference value, it is determined that the polar substance P does not cover the active area AA at the same time. Border area BA.

The touch panel 500 according to the embodiment of the present invention is connected to the touch controller 600 and includes at least a substrate 510, a plurality of first electrodes 531, a conductive line 540, and a stable potential line 550. The substrate 510 has an active area AA and a bezel area BA surrounding the active area AA. The first electrode 531 is disposed on the substrate 510 and located in the active area AA for connecting the first circuit 610 of the touch controller 600. The conductive line 540 is disposed on the substrate 510 and located in the frame area BA, and is disposed around the active area AA for connecting the second circuit 620 of the touch controller 600. The stable potential line 550 is disposed on the substrate 510, is disposed in the frame area BA, and is disposed around the active area AA. The conductive line 540 is disposed around the stable potential line 550, so that the stable potential line 550 is located at the sensing capacitor E. Within the scope. The sensing line E is formed between the conductive line 140 and the first electrode 131 to sense whether the polar substance P covers the frame area BA area, covers the active area AA, or covers the active area AA and the frame area BA at the same time.

Hereinafter, a method of sensing a polar substance according to an embodiment of the present invention will be described. Please refer to FIG. 6 , which is a flow chart of a method for sensing a polar substance according to an embodiment of the invention. The sensing method is applicable to a touch panel, and the touch panel includes a plurality of first electrodes to And at least one conductive line, the first electrode is located in an active area on a substrate for connecting to a first circuit of a touch controller, and the conductive line is located in a frame area on the substrate to surround the active area The configuration is used to connect a second circuit of the touch controller. The sensing methods of the present embodiment can be applied to the touch panels 100 and 300 (shown in FIGS. 1 and 3 respectively) as disclosed in the previous embodiments, and other equally similar touch panels having similar structures.

First, as shown in step S10, a driving signal is outputted by one of the first circuit and the second circuit.

Then, as shown in step S20, a sensing capacitance is formed between the conductive line and the plurality of first electrodes.

Then, as shown in step S30, a sensing signal is received by the other of the first circuit and the second circuit.

Then, as shown in step S40, the sensing signal is compared with a first reference value to determine whether the polar substance covers the frame area and/or the active area. When the sensing signal meets the first reference value, it is determined that the polar substance covers the frame area or the active area, and the first circuit or the second circuit is regarded as the driving circuit for outputting the driving signal.

In an embodiment, when the first circuit is a driving circuit and the second circuit is a sensing circuit, in the outputting step of step S10, the first circuit outputs a driving signal to the first electrode. In the receiving step of step S30, the sensing signal is transmitted from the conductive line to the second circuit. In the step of comparing the first reference value in step S40, when the sensing signal meets the first reference value, it is determined that the polar substance covers the frame area.

In other words, in another embodiment, when the first circuit is a sensing circuit and the second circuit is a driving circuit, in the output step of step S10, the driving signal is output by the second circuit. Number to the conductive line. In the receiving step of step S30, the sensing signal is transmitted from the first electrode to the first circuit. In the step of comparing the first reference value in step S40, when the sensing signal meets the first reference value, it is determined that the polar substance covers the active area.

In another embodiment, the sensing method may perform multiple cyclic measurements within a certain time, for example, performing n times of cyclic measurement (n may be set to be less than 10), and sequentially outputting the driving signal to the ratio by the first circuit. a plurality of steps to the first reference value (as described in the previous paragraph), and a plurality of steps of outputting the drive signal to the conductive line by the second circuit to compare the first reference value (as described in the previous paragraph) Once, it can be judged whether the polar substance covers both the frame area and the active area.

In an embodiment, the touch panel further includes a stable potential line disposed on the substrate, located in the frame region, and disposed around the active region, and the conductive wires are arranged to surround the stable potential line. Configuration (such as the touch panel 500 and its equal touch panel according to FIG. 4 described above). The touch panel sensing method further optionally includes a step S50 of comparing the sensing signal with a second reference value to determine a coverage condition of the polar substance in the frame area and the active area. When the sensing signal meets the second reference value, it is determined that the polar substance covers both the frame area and the active area.

The method for sensing a polar substance according to the embodiment of the present invention compares the received sensing signal with a first reference value or a second reference value by forming a sensing capacitance between the frame area and the active area. Thereby determining whether the polar substance covers the frame area and/or the active area.

According to the touch panel of the foregoing embodiment of the present invention and the method for detecting a polar substance using the same, at least one conductive line is disposed in a frame region of the substrate, and the frame area of the substrate is A sensing capacitor is formed between the domain and the active region to detect whether a polar substance (such as water stains) covers both the frame area and the active area. When it is judged that the polar substance covers the frame area and the active area, the signal of the polar substance can be excluded to provide a more accurate touch reporting mechanism, improve the touch accuracy of the touch panel, and improve product quality.

While the invention has been described above in terms of various embodiments, it is not intended to limit the invention. It will be apparent to those skilled in the art that various modifications and changes may be made without departing from the spirit and scope of the invention, and the scope of the invention is defined by the scope of the appended claims.

100‧‧‧ touch panel

110‧‧‧Substrate

131‧‧‧First electrode

140‧‧‧Flexible wire

200‧‧‧ touch controller

210‧‧‧First circuit

220‧‧‧second circuit

AA‧‧‧active area

BA‧‧‧Border area

Claims (10)

A touch panel is connected to a touch controller. The touch controller includes a first circuit and a second circuit. The touch panel includes: a substrate having an active area and a border surrounding the active area. a plurality of first electrodes disposed on the substrate in the active region for connecting the first circuit; and at least one conductive line disposed on the substrate in the frame region, the conductive line Arranging around the active area for connecting the second circuit; wherein the conductive line and the first electrodes are used to form a sensing capacitor, thereby sensing whether a polar substance covers the frame area and / or the active area. The touch panel of claim 1, wherein the active area has four sides, and the touch panel includes one of the conductive lines, the conductive lines surrounding the four sides of the active area. The touch panel of claim 1, wherein the active area has four sides, the touch panel includes a plurality of the conductive lines, and each of the conductive lines corresponds to one of the four sides. The touch panel of any one of the preceding claims, further comprising: a stable potential line disposed on the substrate, located in the frame region, the stable electricity The bit line is disposed around the active region, the conductive line is disposed around the stable potential line, wherein the stable potential line is located within the range of the sensing capacitor, the conductive line, the first electrodes, and the The sensing potential is formed between the stable potential lines to sense whether the polar substance covers the frame area and the active area at the same time. The touch panel of any one of the preceding claims, wherein the first circuit is a driving circuit, the second circuit is a sensing circuit, and the first electrodes are driving electrodes, The conductive line is a sensing electrode. When the conductive line receives a sensing signal through the sensing capacitor to meet a first reference value, the touch controller determines that the polar substance covers the frame area. The touch panel of any one of the preceding claims, wherein the first circuit is a sensing circuit, the second circuit is a driving circuit, and the first electrodes are sensing electrodes. The conductive line is a driving electrode. When the first electrodes receive a sensing signal through the sensing capacitor to meet a first reference value, the touch controller determines that the polar substance covers the active area. A method for sensing a polar material is applied to a touch panel. The touch panel includes a plurality of first electrodes and at least one conductive line. The first electrodes are located in an active area on a substrate for connecting to a touch panel. a first circuit of the touch controller, the conductive line is located in a frame area of the substrate, and is disposed around the active area for connecting a second circuit of the touch controller, the sensing method The method includes: outputting a driving signal by one of the first circuit and the second circuit; Forming a sensing capacitance between the conductive line and the first electrodes; receiving a sensing signal from the other of the first circuit and the second circuit; and comparing the sensing signal with a first a reference value for determining whether the polar substance covers the bezel area and/or the active area. The sensing method of claim 7, wherein the first circuit is a driving circuit, and the second circuit is a sensing circuit, and the driving signal is output by one of the first circuit and the second circuit. In the step, the driving signal is outputted by the first circuit to the first electrodes, and the step of receiving the sensing signal by the other of the first circuit and the second circuit is performed by the conductive line. Passing the sensing signal to the second circuit, in the step of comparing the sensing signal with the first reference value: when the sensing signal meets the first reference value, determining that the polar substance covers the border region. The sensing method of claim 7, wherein the first circuit is a sensing circuit, the second circuit is a driving circuit, and the driving signal is output by one of the first circuit and the second circuit. In the step, the driving signal is outputted by the second circuit to the conductive line, and the step of receiving the sensing signal by the other of the first circuit and the second circuit is performed by the first electrodes. Transmitting the sensing signal to the first circuit, in the step of comparing the sensing signal with the first reference value: when the sensing signal meets the first reference value, determining that the polar substance covers the active region. The sensing method of claim 7, wherein the touch panel further comprises a stable potential line disposed on the substrate and located in the frame region, the stable potential line being disposed around the active region The conductive line is disposed around the stable potential line, and the sensing capacitor covers the stable potential line. The sensing method further includes: comparing the sensing signal with a second reference value; when the sensing When the signal meets the second reference value, it is determined that the polar substance covers the frame area and the active area at the same time.