TW201606585A - Touch panel and detection method adapted for touch panel - Google Patents

Abstract

A touch panel and a detection method adapted for the touch panel are provided herein. The touch panel includes first electrodes, second electrodes, third electrodes, fourth electrodes, first switch units, second switch units, driving lines and sensing lines. The first electrodes and the second electrodes are disposed on a first area and a second area of a substrate respectively and arranged along a first direction. The first electrodes are isolated from the second electrodes. The third electrodes and the fourth electrodes are disposed on the first area and the second area of the substrate respectively and arranged along a second direction. In a first cycle, the first electrodes receive a first driving signal sequentially through the driving lines. In a second cycle, the second electrodes receive a second driving signal sequentially through the driving lines.

Description

Touch panel and detection method suitable for touch panel

The present invention relates to a touch panel and a method for detecting the touch panel, and more particularly to a touch panel having a switch and a detection method suitable for the touch panel.

With the advancement of touch technology, touch screens have gradually replaced traditional screens and become the input interface of electronic devices. As consumer electronics products become more widely used, more and more products are used in combination with touch functions and displays, such as mobile phones, GPS navigator systems, tablets (tablets). PC), and laptop (laptop PC). Today's touch technology is very diverse, and more common technologies include resistive, capacitive, and optical. Among them, capacitive touch panels have become the mainstream touch technology used in middle and high-end consumer electronic products due to their high accuracy, multi-touch, high durability, and high touch resolution.

FIG. 1 is a schematic diagram of a conventional capacitive touch panel 100. As shown in FIG. 1 , the capacitive touch panel 100 includes a substrate 110 , The plurality of first electrode strings 120, the plurality of second electrode strings 130, the control circuit 140, the plurality of driving lines G_L, and the plurality of sensing lines S_L. The first electrode strings 120 are disposed on the substrate 110 and are horizontally arranged along the X-axis direction. The second electrode string 130 is disposed on the substrate 110 and arranged vertically in the direction of the Y axis. The second electrode string 130 and the first electrode string 120 are staggered with each other, wherein the staggered places form a sensing capacitor (not shown in the drawing). The control circuit 140 is electrically coupled to the first electrode string 120 through the driving line G_L and electrically coupled to the second electrode string 130 through the sensing line S_L. When the control circuit 140 sequentially transmits the driving signal to the first electrode string 120 through the driving line G_L, the control circuit 140 can detect the signal change of the second electrode string 130 through the sensing line S_L to determine whether the touch occurs and determine the touch. The location that occurred. Today's applications for narrow bezels and large display screens are increasing. However, since conventional capacitive touch panels require traces for each electrode, their layout and winding cannot meet the above requirements.

One aspect of the present invention is directed to a touch panel. The touch panel includes a plurality of first electrode strings, a plurality of second electrode strings, a plurality of third electrode strings, a plurality of fourth electrode strings, a plurality of first switching units, a plurality of second switching units, and a plurality of driving lines And multiple sensing lines. The first electrode string is disposed in the first region of the substrate and arranged in the first direction. The second electrode string is disposed in the second region of the substrate and arranged in the first direction. The second electrode string is isolated from the first electrode string. The third electrode string is disposed in the first region of the substrate and arranged in the second direction. The fourth electrode string is disposed in the second region of the substrate and arranged in the second direction. The driving line is electrically coupled to the first electrode string via the first switching unit and electrically coupled to the second electrode string via the second switching unit. One of the sensing lines is electrically coupled to one of the third electrode string and one of the fourth electrode strings. In the first cycle, the first electrode string sequentially receives the first driving signal through the driving line. In the second cycle, the second electrode string sequentially receives the second driving signal through the driving line.

Another aspect of the invention relates to a method of detecting. The detection method is applicable to the touch panel. The touch panel includes a plurality of first electrode strings, a plurality of second electrode strings, a plurality of third electrode strings, a plurality of fourth electrode strings, and a plurality of sensing lines. The first electrode string and the third electrode string are disposed in the first region of the substrate and are aligned in the first direction and the second direction, respectively. The second electrode string and the fourth electrode string are disposed in the second region of the substrate and are arranged in the first direction and the second direction, respectively. One of the sensing lines is electrically coupled to one of the third electrode string and one of the fourth electrode strings. The method for detecting the touch sensing includes: providing a first driving signal to the first electrode string in sequence during the first cycle; and sensing through the sensing line when one of the first electrode strings receives the first driving signal The change of the signal on the third electrode string is used to determine the position where the touch sensing occurs in the first region; in the second cycle, the second driving signal is sequentially supplied to the second electrode string; and when the second electrode string is When receiving the second driving signal, the sensing line senses the change of the signal on the third electrode string to determine the position of the touch sensing in the second area.

In summary, by applying the above embodiments, the number of sensing lines can be reduced and the area required for the winding of the touch panel can be reduced, and the occurrence of touch misjudgment can be avoided.

100‧‧‧Capacitive touch panel

110‧‧‧Substrate

120‧‧‧First electrode string

130‧‧‧Second electrode string

140‧‧‧Control circuit

200‧‧‧ touch panel

210‧‧‧Substrate

211‧‧‧ first area

212‧‧‧Second area

221~225‧‧‧First electrode string

231~238‧‧‧Second electrode string

240‧‧‧Control circuit

250‧‧‧First auxiliary electrode

260‧‧‧Second auxiliary electrode

300‧‧‧ touch panel

310‧‧‧Substrate

311‧‧‧First area

312‧‧‧Second area

321~325‧‧‧First electrode string

331~335‧‧‧Second electrode string

341~344‧‧‧third electrode string

351~354‧‧‧fourth electrode string

360‧‧‧Control circuit

370‧‧‧First switch unit

380‧‧‧Second switch unit

391‧‧‧First auxiliary electrode

392‧‧‧Second auxiliary electrode

410‧‧‧First switch unit

420‧‧‧Second switch unit

500‧‧‧ touch panel

510‧‧‧First touch panel

511A~515A‧‧‧First electrode string

511B~515B‧‧‧Second electrode string

516A~519A‧‧‧third electrode string

516B~519B‧‧‧fourth electrode string

520‧‧‧Second touch panel

521A~525A‧‧‧First electrode string

521B~525B‧‧‧Second electrode string

526A~529A‧‧‧third electrode string

526B~529B‧‧‧fourth electrode string

530‧‧‧Control circuit

540‧‧‧First switch unit

550‧‧‧Second switch unit

560‧‧‧First auxiliary electrode

570‧‧‧Second auxiliary electrode

600‧‧‧Detection method

S610~S670‧‧‧Steps

S611~S613‧‧‧Steps

S651~S653‧‧‧Steps

G_L, G_L1~G_L5‧‧‧ drive line

S_L, S_L1~S_L8‧‧‧Sense line

TN1‧‧‧first transistor

TN2‧‧‧second transistor

D1, D2‧‧‧ diode

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. The description of the drawings is as follows: FIG. 1 is a schematic view showing a conventional capacitive touch panel; FIG. 3 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; FIG. 5 is a schematic diagram of a touch panel according to another embodiment of the present invention; FIG. 6 is a schematic diagram of a touch panel according to an embodiment of the invention; A flowchart of the detection method; FIG. 7A is a flowchart according to a step in the detection method in FIG. 6; and FIG. 7B is a flowchart according to a step in the detection method in FIG. 6.

The embodiments are described in detail below with reference to the drawings, but the embodiments are not intended to limit the scope of the invention, and the structure is controlled. The description of the system is not intended to limit the order in which it is performed, and any device that is re-combined by the elements, which produces equal means, is within the scope of the invention. In addition, the drawings are for illustrative purposes only and are not drawn to the original dimensions. For ease of understanding, the same elements in the following description will be denoted by the same reference numerals.

The terms used in the entire specification and the scope of the patent application, unless otherwise specified, generally have the ordinary meaning of each term used in the field, the content disclosed herein, and the particular content. Certain terms used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in the description of the disclosure.

As used herein, "about", "about" or "substantially" generally means that the error or range of the index value is within 20%, preferably within 10%, and more preferably It is within 5 percent. In the text, unless otherwise stated, the numerical values referred to are regarded as approximations, such as an error or range indicated by "about", "about" or "substantial", or other approximations.

The terms "first", "second", etc., as used herein, are not intended to refer to the order or the order, and are not intended to limit the invention, only to distinguish the elements described in the same technical terms. Or control only.

Secondly, the words "including", "including", "having," "containing," etc., as used herein are all terms of an open term, meaning, but not limited to.

In addition, as regards the "coupling" or "connection" used in this document, It can mean that two or more components are directly in physical or electrical contact with each other, or indirectly in physical or electrical contact with each other, or that two or more components control or act upon each other.

Referring to FIG. 2, FIG. 2 is a schematic diagram of a touch panel 200 according to an embodiment of the invention. As shown in FIG. 2 , the touch panel 200 includes a substrate 210 , first electrode strings 221 225 225 , second electrode strings 231 238 238 , a control circuit 240 , a first auxiliary electrode 250 , a second auxiliary electrode 260 , and a driving line G_L1 . ~G_L5 and sensing lines S_L1~S_L4. In this embodiment, the number of the first electrode strings is five, and the number of the second electrode strings is eight. However, the disclosure is not limited thereto; in other words, those skilled in the art can design according to actual needs. The number of first electrode strings and second electrode strings.

In the present embodiment, the first electrode strings 221 to 225 and the second electrode strings 231 to 238 are disposed on the substrate 210 and are staggered with each other. In other words, the first electrode strings 221 to 225 may be arranged in a first direction (for example, a horizontal direction) and the second electrode strings 231 to 238 may be arranged in a second direction (for example, a vertical direction). The substrate 210 is divided into a first region 211 and a second region 212. Specifically, the second electrode strings 231 to 234 and a portion of the first electrode strings 221 to 225 are disposed in the first region 211, and the second electrode strings 235 to 238 and the other portion of the first electrode strings 221 to 225 are disposed in the second region. Area 212. The control circuit 240 is electrically coupled to the first electrode strings 221 to 225 through the driving lines G_L1 G G_L5. In addition, the control circuit 240 is electrically coupled to one of the second electrode strings 231 - 234 and one of the second electrode strings 235 - 238 through one of the sensing lines S_L1 - S_L4. In this embodiment, the control power The circuit 240 is electrically coupled to the second electrode string 231 and the second electrode string 235 through the sensing line S_L1, and is electrically coupled to the second electrode string 232 and the second electrode string 236 through the sensing line S_L2, and is electrically transmitted through the sensing line S_L3. It is coupled to the second electrode string 233 and the second electrode string 237, and is electrically coupled to the second electrode string 234 and the second electrode string 238 through the sensing line S_L4. However, the embodiment is not limited thereto.

The first auxiliary electrode 250 surrounds the second electrode strings 231 234 234 disposed in the first region 211 and is used to detect whether the first region 211 is touched. The second auxiliary electrode 260 surrounds the second electrode strings 235 238 238 disposed in the second region 212 and is configured to detect whether the second region 212 is touched.

In an operation, the control circuit 240 sequentially transmits the driving signals to the first electrode strings 221 to 225 through the driving lines G_L1 G G_L5, and then determines that the touch occurs in the first region through the first auxiliary electrode 250 and the second auxiliary electrode 260. 211 is also the second region 212. Then, the control circuit 240 senses the signal change on the second electrode strings 231 238 238 through the sensing lines S_L1 S S_L4 to determine whether the touch and the position of the touch point occur.

For example, if the position of the touch point is at the point A1 of the touch panel 200, when the control circuit 240 transmits the driving signal to the first electrode string 221 through the driving line G_L1, the control circuit 240 can detect through the sensing line S_L1. The change of the signal on the second electrode string 231, that is, the capacitance value of the capacitance formed between the first electrode string 221 and the second electrode string 231, determines the position at which the touch point occurs (ie, the first electrode) The position where the string 221 and the second electrode string 231 are staggered). However, since the sensing line S_L1 is electrically coupled to the second battery The pole strings 231 and 235, therefore, the control circuit 240 cannot determine whether the signal on the second electrode string 231 has changed or the signal on the second electrode string 235 has changed. Therefore, the control circuit 240 can further determine whether the touch occurs in the first region 211 or the second region 212 through the first auxiliary electrode 250 and the second auxiliary electrode 260, that is, whether the signal on the second electrode string 231 changes or is determined. The signal on the second electrode string 235 changes and determines where the touch point occurs.

In the present embodiment, the second electrode strings 231 to 234 surrounded by the first auxiliary electrode 250 in the first region 211 and the second electrode strings 235 to 238 surrounding the second region 212 in the second region 212 are disposed. The number of sensing lines can be reduced to half of the number of second electrode strings, thereby reducing the area required for the touch panel 200 to be wound and increasing the area of the visible area.

However, in the present embodiment, if the touch panel 200 is multi-touched, a false positive may occur. For example, if two touch points are located at points A1 and B1 of the touch panel 200, since the first area 211 and the second area 212 are both touched, the control circuit 240 transmits the first auxiliary electrode. The 250 and the second auxiliary electrode 260 cannot determine whether one of the touch points is generated at the A1 point or the A2 point, and whether the other touch point is generated at the B1 point or the B2 point.

Please refer to FIG. 3 , which is a schematic diagram of a touch panel 300 according to another embodiment of the invention. As shown in FIG. 3, the touch panel 300 includes a substrate 310, first electrode strings 321 to 325, second electrode strings 331 to 335, third electrode strings 341 to 344, and fourth electrode strings 351 to 354. The control circuit 360, the first switching unit 370, the second switching unit 380, the driving lines G_L1 to G_L5, and the sensing lines S_L1 to S_L4. In this embodiment, the number of the first electrode string and the second electrode string is five, and the number of the third electrode string and the fourth electrode string are each four, but the disclosure is not limited thereto; in other words, Those skilled in the art can design the number of the first electrode string, the second electrode string, the third electrode string, and the fourth electrode string according to actual needs.

Similarly, in the present embodiment, the substrate 310 is divided into a first region 311 and a second region 312. The first electrode strings 321 to 325 are disposed in the first region 311 of the substrate 310 and are arranged in a first direction (for example, a horizontal direction). The second electrode strings 331 to 335 are disposed in the second region 312 of the substrate 310 and are arranged in the first direction, wherein the second electrode strings 331 to 335 are isolated from the first electrode strings 321 to 325. The third electrode strings 341 to 344 are disposed on the first region 311 of the substrate 310 and arranged in the second direction (for example, the vertical direction). The fourth electrode strings 351 to 354 are disposed in the second region 312 of the substrate 310 and arranged in the second direction. In other words, the first electrode strings 321 to 325 and the third electrode strings 341 to 344 are staggered with each other to form a plurality of sensing capacitors (not shown in the drawings), the second electrode strings 331 to 335 and the fourth electrode strings 351 to 354. They are staggered with each other and form a plurality of sensing capacitors (not shown in the drawings).

The control circuit 360 is electrically coupled to the first electrode string 321 - 325 via the first switching unit 370 , and is electrically coupled to the second electrode string via the second switching unit 380 through the driving circuit G_L1 G G L L L L L L L L L L L L L L L L L L L L L L L L L L L 331~335. In addition, the control circuit 360 is electrically coupled to one of the third electrode strings 341 344 344 and one of the fourth electrode strings 351 354 354 through one of the sensing lines S_L1 S S_L4. In this embodiment The control circuit 360 is electrically coupled to the third electrode string 341 and the fourth electrode string 351 through the sensing line S_L1, and is electrically coupled to the third electrode string 342 and the fourth electrode string 352 through the sensing line S_L2, and transmits the sensing line. The S_L3 is electrically coupled to the third electrode string 343 and the fourth electrode string 353, and is electrically coupled to the third electrode string 344 and the fourth electrode string 354 through the sensing line S_L4, but the embodiment is not limited thereto. .

In this embodiment, the control circuit 360 can sequentially transmit the first driving signals in the first cycle so that the first electrode strings 321 325 325 sequentially receive the first driving signals through the driving lines G_L1 G G_L5. In addition, the control circuit 360 can sequentially transmit the second driving signals in the second cycle, so that the second electrode strings 331 335 335 sequentially receive the second driving signals through the driving lines G_L1 G G_L5, wherein the first period and the second period The periods do not overlap. In other words, the control circuit 360 can transmit the first driving signal to the first electrode strings 321 325 325 in the first cycle, and sense the signal changes on the third electrode strings 341 344 344 through the sensing lines S_L1 S S_L4 to determine Whether the touch occurs in the first area 311, and the control circuit 360 can transmit the second driving signal to the second electrode string 331~335 in the second cycle, and sense the fourth electrode string 351 through the sensing lines S_L1~S_L4. The signal on ~354 changes to determine if a touch occurs in the second region 312.

Further, in the first cycle, the control circuit 360 transmits the first driving signal through the driving lines G_L1 G G_L5 and turns on the first switching unit 370 and the second switching unit 380 through the first driving signal. Thereby, only the first electrode strings 321 325 325 can receive the first driving signal during the first cycle. In addition, at the second cycle, the control circuit 360 transmits the drive line G_L1. ~G_L5 transmits the second driving signal and turns on the second switching unit 380 and turns off the first switching unit 370 through the second driving signal. Thereby, only the second electrode strings 331 335 335 can receive the second driving signal during the second cycle. Through the foregoing implementation manner, the control circuit 360 can determine whether the first region 311 has a touch occurrence during the first cycle, and determine whether the second region 312 has a touch occurrence during the second cycle, thereby avoiding a misjudgment and saving The number of sense lines.

For example, if multi-touch occurs at points A1 and B1 of the touch panel 300. In the first cycle, the control circuit 360 transmits the first driving signal to the first electrode string 321 through the driving line G_L1, and detects the change of the signal on the third electrode string 341 through the sensing line S_L1 (ie, the first electrode). The capacitance value of the capacitance formed between the string 321 and the third electrode string 341 is changed to determine the position at which the touch point occurs. Since the control circuit 360 senses whether the touch is generated in the first region 311 in the first cycle, there is no misjudgment (for example, the misjudgment touch occurs at point A2).

Similarly, in the second cycle, the control circuit 360 transmits the second driving signal to the second electrode string 334 through the driving line G_L4, and detects the change of the signal on the fourth electrode string 352 through the sensing line S_L2 (ie, The capacitance value of the capacitance formed between the second electrode string 334 and the fourth electrode string 352 is changed to determine the position at which the touch point occurs. Since the control circuit 360 senses only whether the touch is generated in the second region 312 during the second cycle, there is no misjudgment (for example, the misjudgment touch occurs at point B2).

In the present embodiment, each of the first switching units 370 includes a diode D1, and each of the second switching units 380 includes a diode D2. two The anode ends of the poles D1 are electrically coupled to the driving lines G_L1 G G_L5, and the cathode ends of the diodes D1 are electrically coupled to the first electrode strings 321 325 325. The cathode ends of the diodes D2 are electrically coupled to the driving lines G_L1 G G_L5, and the anode ends of the diodes D2 are electrically coupled to the second electrode strings 331 335 335. In the case where the first electrode strings 321 to 325 and the second electrode strings 331 to 335 are electrically coupled to the common electrode (not shown), the first driving signal is a high level voltage signal (relative to the first driving signal). The voltage level of the common electrode) is such that the diode D1 is turned on and the diode D2 is turned off during the first period. If the second driving signal is a low level voltage signal (relative to the voltage level of the common electrode), the diode D2 is turned on and the diode D1 is turned off during the second period, thereby achieving time-sharing determination of touch. the goal of. It should be noted that the embodiments are merely examples, and those skilled in the art can make various changes and refinements without departing from the spirit and scope of the present invention; in other words, those skilled in the art can change according to actual needs. The timing of the control and the connection of the diodes D1 and D2.

Referring to FIG. 4, FIG. 4 is a schematic diagram of a first switching unit 410 and a second switching unit 420 according to an embodiment of the invention. The first switch unit 410 and the second switch unit 420 can be applied to the touch panel 300 in FIG. 3, but the embodiment is not limited thereto. In the present embodiment, the first switching unit 410 includes a first transistor TN1, and the second switching unit 420 includes a second transistor TN2, wherein the characteristics of the first transistor TN1 are complementary to the characteristics of the second transistor TN2. In other words, when the first transistor TN1 is a P-type MOS field-effect transistor (PMOS) or a PNP-type transistor, the second transistor TN2 is an N-type MOS field-effect transistor (NMOS) or an NPN-type transistor; When the first transistor TN1 is an N-type gold-oxygen half field effect transistor In the case of a bulk or NPN type transistor, the second transistor TN2 is a P-type gold oxide half field effect transistor or a PNP type transistor.

In this embodiment, the first transistor TN1 is an NMOS, and the second transistor TN2 is a PMOS. However, the embodiment is not limited thereto. As shown in FIG. 4, the gate terminals and the NMOS terminals of the first transistor TN1 and the second transistor TN2 are short-circuited. The first transistor TN1 is electrically coupled to the driving line (not shown) and its source is electrically coupled to the first electrode string (not shown). The second transistor TN2 is electrically coupled to the driving line (not shown) and the source is electrically coupled to the second electrode string (not shown). Thereby, the first transistor TN1 and the second transistor TN2 can be respectively turned on by the high-level voltage signal and the low-level voltage signal, so as to achieve the purpose of determining the touch by time division. The embodiments are only examples, and those skilled in the art can make various changes and refinements without departing from the spirit and scope of the present invention; in other words, those skilled in the art can change the first according to actual needs. The type of transistor TN1 and second transistor TN2 and their connection relationship and control mode.

As shown in FIG. 3 , in an embodiment, the touch panel 300 may further include a first auxiliary electrode 391 and a second auxiliary electrode 392 . The first auxiliary electrode 391 is disposed on the substrate 310 and surrounds the third electrode strings 341 344 344 for determining whether the first region 311 is touch sensitive. The second auxiliary electrode 392 is disposed on the substrate 310 and surrounds the fourth electrode string 351-354 for determining whether the second region 312 is touch sensitive.

In an operation, when the control circuit 360 senses the first region 311 or the second region through the first auxiliary electrode 391 or the second auxiliary electrode 392 When the touch sensing occurs in 312, the control circuit 360 sequentially transmits the first driving signal or the second driving signal to the first electrode strings 321 to 325 or the second electrode strings 331 to 335. In other words, when the touch sensing is performed on the first region 311, the first electrode strings 321 325 325 sequentially receive the first driving signals and determine the position where the touch occurs through the third electrode strings 341 344 344. When the touch sensing is performed on the second region 312, the second electrode strings 331-335 sequentially receive the second driving signals and determine the position where the touch occurs through the fourth electrode strings 351-354. Therefore, in addition to saving the number of sensing lines and avoiding false positives, the control circuit 360 does not need to generate the first driving signal and the second driving signal to the first electrode string 321~325 and the first Two electrode strings 331~335 can save power loss.

It should be noted that the present invention is not limited to dividing the substrate into two regions. In other words, those skilled in the art can divide the substrate into three or more regions according to actual needs, or two or more substrates. A composite touch panel is integrated.

Please refer to FIG. 5 , which is a schematic diagram of a touch panel 500 according to another embodiment of the invention. As shown in FIG. 5 , the touch panel 500 includes a first touch panel 510 , a second touch panel 520 , a control circuit 530 , a first switch unit 540 , a second switch unit 550 , a first auxiliary electrode 560 , and a second The auxiliary electrode 570, the driving lines G_L1 to G_L5, and the sensing lines S_L1 to S_L8. The touch panel 500 is formed by integrating the first touch panel 510 and the second touch panel 520. The first touch panel 510 and the second touch panel 520 are respectively the touch panel 300 shown in FIG. 3 .

In this embodiment, the control circuit 530 can pass through the driving line G_L1. The first electrode strings 511A-515A of the first touch panel 510 and the first electrode strings 521A-525A of the second touch panel 520 are electrically coupled to the first touch panel 510. In addition, the control circuit 530 can be electrically coupled to the second electrode string 511B - 515B of the first touch panel 510 and the second electrode string of the second touch panel 520 via the second switch unit 550 through the driving circuit G_L1 - G_L5 521B~525B.

The control circuit 530 can be electrically coupled to one of the third electrode strings 516A-519A and the fourth electrode string 516B-519B in the first touch panel 510 through one of the sensing lines S_L1 to S_L4, and through One of the sensing lines S_L5 to S_L8 is electrically coupled to one of the third electrode strings 526A-529A and the fourth electrode string 526B-529B in the second touch panel 520.

The first auxiliary electrode 560 surrounds the third electrode strings 516A-519A in the first touch panel 510 and the third electrode strings 526A-529A in the second touch panel 520. The second auxiliary electrode 570 surrounds the third electrode strings 516A-519A in the first touch panel 510 and the third electrode strings 526A-529A in the second touch panel 520.

Similarly, the first switching unit 540 and the second switching unit 550 may respectively include a transistor having a complementary characteristic or a diode having a different connection manner, which is not limited thereto. The operation mode of the touch panel 500 is similar to that of the touch panel 300 of FIG. 3 , and details are not described herein. Therefore, even if the number of the touch electrodes is increased, the touch panel 500 can achieve the multi-touch effect through the same number of driving lines and the halved sensing lines.

Referring to FIG. 6, FIG. 6 is a flowchart of a detecting method 600 according to an embodiment of the invention. The detection method 600 is applicable to a touch panel. For the sake of clarity and convenience, the detection method 600 is exemplified by the touch panel 300 of FIG. 3, but the disclosure is not limited thereto. First, in step S610, in the first cycle, the first driving signal is turned on by the control circuit 360 to turn on the first switching unit 370 and the second switching unit 380, so that the first electrode strings 321 325 325 are sequentially received. The first drive signal. Next, in step S630, when one of the first electrode strings 321-325 receives the first driving signal, the change of the signal on the third electrode string 341~344 is sensed through the sensing lines S_L1~S_L4 to determine the first The location of the touch sensing occurs in the area 311. Specifically, when the signal of one of the third electrode strings 341 344 344 changes, one of the third electrode strings 341 344 344 and the first electrode string that receives the first driving signal at the moment It can determine where the touch sensing occurs.

Next, in step S650, in the second cycle, the second driving signal is turned on by the control circuit 360 to turn on the second switching unit 380 and turn off the first switching unit 370, so that the second electrode strings 331~335 are sequentially received. The second drive signal. Next, in step S670, when one of the second electrode strings 331-335 receives the second driving signal, the change of the signal on the fourth electrode string 351-354 is sensed through the sensing lines S_L1~S_L4 to determine the second signal. The location of the touch sensing occurs in the area 312. Similarly, when the signal of one of the fourth electrode strings 351-354 changes, one of the fourth electrode strings 351-354 and the second electrode string of the second driving signal can be received. Determine where the touch sensing occurs. In this embodiment, The period of the first period does not overlap with the period of the second period. In this way, the situation of misjudgment of the touch can be avoided.

Please refer to Figure 7A and Figure 7B together. FIG. 7A is a flow chart of a step S610 in the detecting method 600 according to FIG. 6. FIG. 7B is a flow chart of a step S630 in the detecting method 600 according to FIG. 6. In an embodiment, step S610 further includes steps S611 and S613 as shown in FIG. 7A. In step S611, it is determined whether the first region 311 of the substrate 310 has a touch reaction through the first auxiliary electrode 391. When the touch reaction occurs in the first region 311, the signal on the first auxiliary electrode 391 changes, and step S613 is performed. In step S613, the first driving signal is sequentially supplied to the first electrode strings 321 to 325 through the control circuit 360.

In another embodiment, step S630 further includes step S631 and step S633, as shown in FIG. 7B. In step S631, it is determined whether the first region 312 of the substrate 310 has a touch response through the second auxiliary electrode 392. When the touch reaction occurs in the second region 312, the signal on the first auxiliary electrode 392 changes, and step S633 is performed. In step S633, the second driving signal is sequentially supplied to the second electrode strings 331 to 335 through the control circuit 360. Therefore, the control circuit 360 can generate the first driving signal or the second driving signal to the first electrode string 321 325 or the second electrode string 331 335 when the touch sensing occurs, thereby saving power loss.

As can be seen from the above embodiments of the present invention, by dividing the area of the substrate into a plurality of areas, the number of sensing lines can be reduced and the area required for the touch panel winding can be reduced. In addition, the first switching unit is electrically coupled to the first switching unit Between the first electrode string and the driving line in the first region, and the second switching unit is electrically coupled between the second electrode string and the driving line in the second region, while reducing the number of sensing lines It can also avoid the occurrence of touch misjudgment. Furthermore, the control circuit can generate the first driving signal when the touch sensing occurs, by setting the first auxiliary electrode to surround the third electrode in the first region and the second auxiliary electrode to surround the fourth electrode in the second region. Or the second driving signal is sent to the first electrode string or the second electrode string to save power loss.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

300‧‧‧ touch panel

310‧‧‧Substrate

311‧‧‧First area

312‧‧‧Second area

321~325‧‧‧First electrode string

331~335‧‧‧Second electrode string

341~344‧‧‧third electrode string

351~354‧‧‧fourth electrode string

360‧‧‧Control circuit

370‧‧‧First switch unit

380‧‧‧Second switch unit

391‧‧‧First auxiliary electrode

392‧‧‧Second auxiliary electrode

G_L1~G_L5‧‧‧ drive line

S_L1~S_L4‧‧‧Sensing line

D1, D2‧‧‧ diode

Claims (10)

A touch panel includes: a plurality of first electrode strings disposed in a first region of a substrate and arranged along a first direction; a plurality of second electrode strings disposed in a second region of the substrate, and along the Arranging in a first direction, wherein the second electrode strings are isolated from the first electrode strings; a plurality of third electrode strings are disposed in the first region and arranged along a second direction; and the plurality of fourth electrode strings are disposed in The second area is aligned along the second direction; the plurality of first switching units; the plurality of second switching units; the plurality of driving lines, the first switching units are electrically coupled to the first electrode strings via the first switching units, and The second switch unit is electrically coupled to the second electrode strings; and the plurality of sensing lines, wherein one of the sensing lines is electrically coupled to one of the third electrode strings and the fourth electrode strings One of the first electrode strings sequentially receives a first driving signal through the driving lines in a first cycle, and the second electrode strings pass the driving signals in a second cycle The line sequentially receives a second driving signal. The touch panel of claim 1, wherein the first period is The period does not overlap with the period of the second period. The touch panel of claim 1, wherein the first switching unit is turned on by the first driving signal and the second switching unit is turned off by the first driving signal in the first period, During the second cycle, the second switching units are turned on by the second driving signal and the first switching units are turned off by the second driving signal. The touch panel of claim 1, wherein each of the first switch units comprises a first transistor, each of the second switch units comprising a second transistor, wherein the first The characteristics of the transistor are complementary to the characteristics of the second transistor. The touch panel of claim 1, wherein each of the first switch units comprises a first diode, and each of the second switch units comprises a second diode, wherein the One of the first diodes is electrically coupled to one of the driving lines, and one of the first diodes is electrically coupled to one of the first electrode strings, the second diode One of the cathode ends is electrically coupled to one of the plurality of driving lines, and an anode end of the second diode is electrically coupled to one of the second electrode strings. The touch panel of claim 1, further comprising: a first auxiliary electrode surrounding the third electrode string for determining whether the first area has touch sensing; and a second auxiliary electrode is disposed between the fourth electrode strings to determine whether the second region has touch sensing. When the touch sensing is performed on the first region, the first electrode strings are sequentially Receiving the first driving signal, when the touch sensing is performed in the second area, the second electrode strings sequentially receive the second driving signal. A detection method is applicable to a touch panel, the touch panel includes a plurality of first electrode strings, a plurality of second electrode strings, a plurality of third electrode strings, a plurality of fourth electrode strings, and a plurality of sensing lines, wherein the An electrode string and the third electrode strings are disposed in a first region of a substrate and are respectively arranged along a first direction and a second direction, and the second electrode strings and the fourth electrode strings are disposed on the substrate One of the sensing lines is electrically coupled to one of the third electrode strings and one of the fourth electrode strings, The detecting method includes: sequentially providing a first driving signal to the first electrode strings in a first cycle; and transmitting the first driving signal when the one of the first electrode strings receives the first driving signal The sensing line senses a change of the signal on the third electrode string to determine a position where the touch sensing occurs in the first area; and in a second cycle, a second driving signal is sequentially provided to the second An electrode string; and when one of the second electrode strings receives the When the second drive signal, measuring the signal changes of the plurality of strings on the third electrode so as to determine the position of the touch sensing occur in this region through the plurality of second sensing line sensing. The detecting method of claim 7, wherein the period of the first period does not overlap with the period of the second period. The method of detecting the method of claim 7, further comprising: determining whether the first area has touch sensing through a first auxiliary electrode disposed between the third electrode strings; and when the first area is touched In the sensing, the first driving signal is sequentially supplied to the first electrode strings; and a second auxiliary electrode is disposed between the fourth electrode strings to determine whether the second region has touch sensing; and when When the touch sensing is performed in the second area, the second driving signal is sequentially supplied to the second electrode strings. The method of claim 7, further comprising: a first switching unit electrically coupled between the driving line and the first electrode string through the first driving signal during the first period And a second switching unit electrically coupled between the driving line and the second electrode string; and in the second period, turning on the second switching unit and turning off the first through the second driving signal Switch unit.