CN101937278A - Touch panel with asymmetric conductive patterns and related device and method thereof - Google Patents

Abstract

A touch panel with asymmetric conductive patterns and related devices and methods. The touch panel comprises a substrate and a transparent conductive layer. The transparent conductive layer comprises a plurality of groups of first, second and third conductive patterns and a plurality of first, second and third wires. Each set of the first conductive patterns is arranged in a first direction. Each group of second conductive patterns is arranged along the second direction and is positioned on the first side of the second direction. Each group of the third conductive patterns is arranged along the second direction and is positioned at the second side of the second direction. Each group of the first, second and third conductive patterns is electrically insulated from each other. The area of each second conductive pattern in each group of second conductive patterns is different, and the area of each third conductive pattern in each group of third conductive patterns is different.

Description

Touch panel with asymmetric conductive pattern and related device and method

technical field

The present invention relates to a touch panel and its related device and method, in particular to a touch panel with an asymmetric conductive pattern and its related device and method for determining the position of multiple touches.

Background technique

In today's various consumer electronics markets, portable electronic devices such as personal digital assistants (PDAs), mobile phones (mobile phones) and PDA mobile phones have widely used touch panels as their data communication channels. interface tools. Traditional touch panels are mainly resistive touch panels and capacitive touch panels. Resistive touch panels use voltage drop to locate the touch position, while capacitive touch panels usually include sensing capacitors. Measure the capacitance change of the capacitor, and then use the horizontal (X direction) and vertical (Y direction) interlaced scanning methods to detect the touch position.

In traditional capacitive touch panels, when two fingers touch the panel at the same time, false coordinates may be reported. The reason for the false coordinates of the traditional capacitive touch panel is mostly from the conductive patterns on the panel (for example: conductive patterns made of indium tin oxide (ITO) or indium zinc oxide (IZO). pattern) due to. Please refer to FIG. 1 , which is a schematic diagram of a symmetrical conductive pattern of a touch panel in the prior art. The touch panel usually includes a transparent conductive layer 100 which can be formed on a substrate by performing a photolithography and etching process (PEP). In FIG. 1 , the transparent conductive layer 100 includes multiple sets of first conductive patterns 160 , multiple sets of second conductive patterns 170 , multiple first wires 130 and multiple second wires 140 . Wherein, each group of first conductive patterns 160 is arranged along a first direction 110 (such as the Y direction), and each group of second conductive patterns 170 is arranged along a second direction 120 (such as the X direction), and each group of the first A conductive pattern 160 and each group of second conductive patterns 170 are electrically insulated from each other (not shown). In addition, each first wire 130 is used to electrically connect a plurality of first conductive patterns 160 located in the same group (eg, the same row), and each second wire 140 is used to electrically connect multiple conductive patterns 160 located in the same group (eg, the same row). a second conductive pattern 170.

As shown in FIG. 1 , each first conductive pattern 160 has the same area, and each second conductive pattern 170 has the same area. That is to say, the conventional capacitive touch panel has symmetrical conductive patterns, wherein each first conductive pattern 160 and each second conductive pattern 170 have the same area. Since the capacitance change of the traditional capacitive touch panel is proportional to the touched area, and it is scanned row by row and column by column, we can know which rows and which columns are touched by fingers at the intersections , but do not know which points are touched by fingers. For example, suppose the points touched by the user are (X1, Y2) and (X2, Y1), but the recognition system of the traditional capacitive touch panel cannot distinguish (X1, Y2), (X2, Y1) and ( The difference between X1, Y1), (X2, Y2), so it is possible to report the coordinates of (X1, Y1) and (X2, Y2) and cause errors.

Contents of the invention

Therefore, one of the objectives of the present invention is to provide a touch panel with an asymmetric conductive pattern and its related device and method for determining the position of multiple touches, so as to solve the above-mentioned problems.

The invention discloses a touch panel with an asymmetric conductive pattern. The touch panel includes a substrate and a transparent conductive layer. The transparent conductive layer is formed on the substrate, which includes multiple sets of first conductive patterns, multiple sets of second conductive patterns, multiple sets of third conductive patterns, multiple first wires, multiple second wires and multiple third wires. wire. Each group of first conductive patterns is arranged along a first direction. Each group of second conductive patterns is arranged along a second direction different from the first direction, and each group of second conductive patterns is located at a first side of the second direction. Each group of third conductive patterns is arranged along the second direction, and each group of third conductive patterns is located on a second side of the second direction, and the second side is opposite to the first side. Wherein each group of first conductive patterns, each group of second conductive patterns and each group of third conductive patterns are electrically insulated from each other, the area of each second conductive pattern in each group of second conductive patterns is different, and each group of second conductive patterns has a different area. The area of each third conductive pattern in a set of third conductive patterns is different. Each first wire is used to electrically connect a plurality of first conductive patterns in the same group, each second wire is used to electrically connect a plurality of second conductive patterns in the same group, and each third wire is used to electrically connect A plurality of third conductive patterns located in the same group. Wherein the multiple sets of first conductive patterns, the multiple sets of second conductive patterns and the multiple sets of third conductive patterns are made of indium tin oxide (ITO) or indium zinc oxide (IZO).

The invention further discloses a touch device capable of judging the positions of multiple touches. The touch device includes a touch panel, a control circuit and a micro processing unit. The touch panel includes a substrate, a transparent conductive layer and a plurality of sensing units. The transparent conductive layer is formed on the substrate, which includes multiple sets of first conductive patterns, multiple sets of second conductive patterns, multiple sets of third conductive patterns, multiple first wires, multiple second wires and multiple third wires. wire. Each group of first conductive patterns is arranged along a first direction. Each group of second conductive patterns is arranged along a second direction different from the first direction, and each group of second conductive patterns is located at a first side of the second direction. Each group of third conductive patterns is arranged along the second direction, and each group of third conductive patterns is located on a second side of the second direction, and the second side is opposite to the first side. Wherein each group of first conductive patterns, each group of second conductive patterns and each group of third conductive patterns are electrically insulated from each other, the area of each second conductive pattern in each group of second conductive patterns is different, and each group of second conductive patterns has a different area. The area of each third conductive pattern in a set of third conductive patterns is different. Each first wire is used to electrically connect a plurality of first conductive patterns in the same group, each second wire is used to electrically connect a plurality of second conductive patterns in the same group, and each third wire is used to electrically connect A plurality of third conductive patterns located in the same group. A plurality of sensing units are used to detect a first touch and a second touch to generate a first touch signal and a second touch signal respectively. The control circuit is coupled to the touch panel, and is used to read the first and second touch signals of the touch panel to generate a control signal, and judge a first position of the first contact according to the control signal and A second position of the second contact. The micro-processing unit is coupled to the control circuit, and is used for executing a corresponding specific function according to the first contact at the first position and the second contact at the second position. Wherein the first direction is the X direction, and the second direction is the Y direction.

The invention further discloses a method for judging the positions of multiple touches. The method includes: providing a touch panel, the touch panel includes a transparent conductive layer having multiple sets of first conductive patterns, multiple sets of second conductive patterns and multiple sets of third conductive patterns, each set of first conductive patterns Arranged along a first direction, each group of second conductive patterns is arranged along a second direction different from the first direction and each group of second conductive patterns is located on a first side of the second direction, each group of second conductive patterns Three conductive patterns are arranged along the second direction and each group of third conductive patterns is located on a second side of the second direction opposite to the first side, wherein each group of first conductive patterns and each group of second conductive patterns The pattern and each group of third conductive patterns are electrically insulated from each other, the area of each second conductive pattern in each group of second conductive patterns is different, and the area of each third conductive pattern in each group of third conductive patterns are all different; use the touch panel to detect a first touch and a second touch to generate a first touch signal and a second touch signal respectively; read the first and second touch of the touch panel control signal to generate a control signal; judging a first position of the first contact and a second position of the second contact according to the control signal; The second contact at two positions performs a corresponding specific function.

Description of drawings

FIG. 1 is a schematic diagram of a symmetrical conductive pattern of a touch panel in the prior art.

FIG. 2 is a cross-sectional view of a touch panel with an asymmetric conductive pattern according to the present invention.

FIG. 3 is a schematic diagram of a first embodiment of an asymmetric conductive pattern of the transparent conductive layer of the touch panel in FIG. 2 .

FIG. 4 is a schematic diagram of a second embodiment of an asymmetric conductive pattern of the transparent conductive layer of the touch panel in FIG. 2 .

FIG. 5 is a block diagram of an embodiment of a touch-sensitive device capable of determining the position of multiple touches according to the present invention.

FIG. 6 is a schematic diagram of an example of the control circuit in FIG. 5 .

FIG. 7 is a flow chart of an example operation of the method for determining the position of multiple touches of the present invention.

FIG. 8 is a flowchart illustrating detailed steps of step 710 in FIG. 7 .

[Description of main component symbols]

100, 250, 300, 400, 520 transparent conductive layer

110, 310, 410 First direction

120, 320, 420 Second direction

130, 330, 430 The first wire

140, 340, 440 Second wire

350, 450 Third wire

160, 360, 460, 521 The first conductive pattern

170, 370, 470, 522 Second conductive pattern

380, 480, 523 The third conductive pattern

200, 510 touch panel

210 Substrate

500 Touch Devices

530 sensing unit

540 control circuit

550 Micro-processing units

TU1 First Contact

TU2 Second Contact

S1 The first touch signal

S2 Second touch signal

P1 first position

P2 second position

610 The first judging unit

620 Second judging unit

630 The third judging unit

VA11, VA12, VA13, VA21, VA22, VA23 Values

X1’, X2’, Y1’, Y2’ coordinates

SI1 First Information

SI2 Second information

Threshold value of TH1, TH2

Steps 702～712, 810～850

Detailed ways

Please refer to FIG. 2 , which is a cross-sectional view of a touch panel 200 with an asymmetric conductive pattern according to the present invention. As shown in FIG. 2 , the touch panel 200 includes (but is not limited to) a substrate 210 and a transparent conductive layer 250 . The transparent conductive layer 250 is formed on the substrate 210 and has an asymmetric conductive pattern (not shown), which can be formed by the transparent conductive layer 300 (please refer to FIG. 3 ) or the transparent conductive layer 400 (please refer to FIG. 3 ) mentioned in the following embodiments. Refer to Figure 4) to practice. Details about the asymmetric conductive pattern on the transparent conductive layer 250 will be further described in the following embodiments.

Please note that the above-mentioned embodiments take the substrate 210 and the transparent conductive layer 250 as examples, but this is not a limitation of the present invention. Those skilled in the art should understand that the number of substrates and transparent conductive layers of the touch panel is not limited. In addition, the substrate 210 may be made of glass material or plastic material, but the present invention is not limited thereto. The transparent conductive layer 250 can be formed on the glass material by evaporation, or can be formed by pasting an organic thin film.

Please refer to FIG. 3 , which is a schematic diagram of a first embodiment of the asymmetric conductive pattern of the transparent conductive layer of the touch panel in FIG. 2 . As shown in FIG. 3 , the transparent conductive layer 300 includes multiple sets of first conductive patterns 360, multiple sets of second conductive patterns 370, multiple sets of third conductive patterns 380, multiple first wires 330, multiple second wires 340 and multiple A third wire 350. Wherein, each group of first conductive patterns 360 is arranged along a first direction 310, each group of second conductive patterns 370 is arranged along a second direction 320 different from the first direction 310, and each group of second conductive patterns 370 Located on a first side (for example, below) of the second direction 320, and each group of third conductive patterns 380 is arranged along the second direction 320, and each group of third conductive patterns 380 is located on a second side of the second direction 320 (eg above). And each group of first conductive patterns 360 , each group of second conductive patterns 370 and each group of third conductive patterns 380 are electrically insulated from each other (not shown). In addition, each first wire 330 is used to electrically connect a plurality of first conductive patterns 360 in the same group (for example, the same row), and each second wire 340 is used to electrically connect a plurality of second conductive patterns 370 in the same group. (for example, the same row), and each third wire 350 is used to electrically connect a plurality of third conductive patterns 380 in the same group (for example, the same row).

It can be seen from FIG. 3 that the area of each second conductive pattern 370 in each group (in the same column) of the second conductive patterns is different, and in each group (in the same column) of the third conductive patterns, the area of each third conductive pattern 370 is different. The areas of the conductive patterns 380 are all different. In other words, the touch panel disclosed in the present invention has an asymmetric conductive pattern. Therefore, when a finger touches the touch panel, since the areas of the second conductive pattern 370 and the third conductive pattern 380 at the same position are different, the amount of capacitance change produced will also be different. The capacitance variation generated by the second conductive pattern 370 and the third conductive pattern 380 at the same position is used to determine whether the position of the contact point is left or right. For example, the coordinate information on the X axis can be obtained through the first wire 330 , and the coordinate information on the Y axis can be obtained through the second wire 340 and the third wire 350 . Next, the position of the contact on the X-axis is determined by using the obtained coordinate information on the X-axis, and the position of the contact on the Y-axis is determined by using the obtained coordinate information on the Y-axis. Finally, according to the difference between the contact on a second conductive pattern 370 and a third conductive pattern 380 , it is judged whether the point of the contact is to the left or to the right or more than one point.

Please note that the above multiple sets of first conductive patterns 360, multiple sets of second conductive patterns 370 and multiple sets of third conductive patterns 380 may be made of indium tin oxide (ITO) or indium zinc oxide (IZO), but the present invention It is not limited thereto, and may also be made of other materials. In this embodiment, the first direction 310 is the Y direction, and the second direction 320 is the X direction, but this is not a limiting condition of the present invention. Those skilled in the art should understand that without departing from the spirit of the present invention, various changes about the first direction and the second direction are all possible, which should also fall within the scope of the present invention.

Please refer to FIG. 4 , which is a schematic diagram of a second embodiment of the asymmetric conductive pattern of the transparent conductive layer of the touch panel in FIG. 2 . In FIG. 4, the structure of the transparent conductive layer 400 is similar to that of the transparent conductive layer 300 shown in FIG. . As shown in FIG. 4, the transparent conductive layer 400 includes multiple sets of first conductive patterns 460, multiple sets of second conductive patterns 470, multiple sets of third conductive patterns 480, multiple first wires 430, multiple second wires 440, and multiple A third wire 450. Wherein, each group of first conductive patterns 460 is arranged along a first direction 410 (ie, X direction), and each group of second conductive patterns 470 is arranged along a second direction 420 different from the first direction 410 (ie, Y direction). , and each group of second conductive patterns 470 is located on a first side (for example, the left side) of the second direction 420, and each group of third conductive patterns 480 is arranged along the second direction 420, and each group of third conductive patterns 480 is located on a second side (eg right side) of the second direction 420 . And each group of first conductive patterns 460 , each group of second conductive patterns 470 and each group of third conductive patterns 480 are electrically insulated from each other. In addition, each first wire 430 is used to electrically connect a plurality of first conductive patterns 460 located in the same group (for example, the same row), and each second wire 440 is used to electrically connect a plurality of conductive patterns located in the same group (for example, the same row). The second conductive pattern 470 and each third wire 450 are used to electrically connect a plurality of third conductive patterns 480 in the same group (for example, the same row).

Please refer to FIG. 5 , which is a block diagram of an embodiment of a touch-sensitive device 500 capable of determining the position of multiple touches according to the present invention. As shown in FIG. 5 , the touch-sensitive device 500 includes (but is not limited to) a touch panel 510 , a control circuit 540 and a micro-processing unit 550 . The touch panel 510 includes a transparent conductive layer 520 and a plurality of sensing units 530 . The transparent conductive layer 520 has multiple sets of first conductive patterns 521, multiple sets of second conductive patterns 522 and multiple sets of third conductive patterns 523, wherein the multiple sets of first conductive patterns 521 can be composed of the first conductive patterns shown in FIG. 3 or FIG. 360, 460, multiple sets of second conductive patterns 522 can be implemented by the second conductive patterns 370, 470 shown in FIG. 3 or 4, and multiple sets of third conductive patterns 523 can be implemented by the first Three conductive patterns 380, 480 are practiced. Multiple sensing units 530 detect a first contact TU1 and a second contact TU2 through multiple sets of first conductive patterns 521, multiple sets of second conductive patterns 522, and multiple sets of third conductive patterns 523 to generate a first contact TU2 respectively. The touch signal S1 and a second touch signal S2. The control circuit 540 is coupled to the touch panel 510, and is used to read the first and second touch signals S1 and S2 of the touch panel 510 to generate a control signal, and determine a position of the first touch TU1 according to the control signal. The first position P1 and a second position P2 of the second contact TU2. The micro-processing unit 550 is coupled to the control circuit 540, and is used to perform a corresponding specific function according to the first contact TU1 located at the first position P1 and the second contact TU2 located at the second position P2, such as zooming in, zooming out, etc. Function.

Please note that the above-mentioned touch panels 200, 510 can be a capacitive touch panel, and the first touch signal S1 and the second touch signal S2 include capacitance variation, but the present invention is not limited thereto, and can also be for other types of touch panels. In addition, the touch-sensitive device 500 can be a mobile phone or a personal digital assistant (PDA), but the present invention is not limited thereto, and can also be other types of touch-sensitive devices.

Please refer to FIG. 6 , which is a schematic diagram of an example of the control circuit 540 in FIG. 5 . In this embodiment, the control circuit 540 includes a first judging unit 610 , a second judging unit 620 and a third judging unit 630 . The first judgment unit 610 obtains a first coordinate (such as X1') of the first touch TU1 according to a value VA11 of the first touch signal S1 in a first conductive pattern (such as 360, 460), and according to the second touch TU1 A value VA21 of the control signal S2 in another first conductive pattern (eg 360, 460) is used to obtain a first coordinate (eg X2') of the second contact TU2. The second judging unit 620 obtains the first contact according to a value VA12 of the first touch signal S1 in a second conductive pattern (eg 370, 470) and a value VA13 in a third conductive pattern (eg 380, 480). A second coordinate (eg Y1') of TU1, and a value VA22 in another second conductive pattern (eg 370, 470) and a value VA22 in another third conductive pattern (eg 380, 480) according to the second touch signal S2 ) to obtain a second coordinate (eg Y2') of the second contact TU2. In addition, the second judging unit 620 generates a first information SI1 related to the left or right of the first touch TU1 according to the above-mentioned values VA12 and VA13, and generates a first information SI1 related to the second touch TU1 according to the above-mentioned values VA22 and VA23. TU2 is a second message SI2 on the left or on the right. Finally, the third determining unit 630 uses the first information SI1 to determine the first position P1 of the first contact TU1 according to the first coordinate X1' and the second coordinate Y1' of the first contact TU1, and uses the second information SI2 to determine the first position P1 of the first contact TU1. The second position P2 of the second contact TU2 is determined according to the first coordinate X2' and the second coordinate Y2' of the second contact TU2.

Next, an example is given to describe in detail how the control circuit 540 of the touch-sensitive device 500 determines the positions of multiple touches. First, assume that the first position P1 of the first contact TU1 falls on the coordinates of (X1', Y1'), and the second position P2 of the second contact TU2 falls on the coordinates of (X2', Y2').

The first judging unit 610 obtains the first coordinate X1' of the first touch TU1 according to the value VA11 of the first touch signal S1 in a first conductive pattern, and obtains the first coordinate X1' of the first touch TU1 in accordance with the second touch signal S2 in another first conductive pattern. Value VA21 to obtain the first coordinate X2' of the second contact TU2, the above steps can be expressed by the following formula:

X1'＝VA11 (1)

X2'＝VA21 (2)

Next, the second judging unit 620 obtains the second coordinate Y1' of the first contact TU1 according to the value VA12 of the first touch signal S1 in a second conductive pattern and the value VA13 in a third conductive pattern, and according to the second The value VA22 of the touch signal S2 in another second conductive pattern and a value VA23 in another third conductive pattern to obtain a second coordinate Y2' of the second contact TU2, the above steps can be expressed by the following formula :

Y1'＝VA12+VA13 (3)

Y2'＝VA22+VA23 (4)

In this way, four possible coordinates (X1', Y1'), (X1', Y2'), (X2', Y1') and (X2', Y2') can be obtained. Taking the transparent conductive layer 300 in FIG. 3 as an example, since the areas of the second conductive pattern 370 and the third conductive pattern 380 at the same position are different, the amount of capacitance change produced by them will also be different. The judging unit 620 can further judge whether the second coordinate Y1' of the first touch TU1 is to the left or to the right ( That is, the first information SI1). For example, when the result of VA12-VA13 is greater than a first critical value TH1, it is judged that Y1' is closer to the left coordinate; when the result of VA12-VA13 is smaller than a second critical value TH2, it is judged that Y1' is closer to the right and when the result of VA12-VA13 is between the first critical value TH1 and the second critical value TH2, it is judged that Y1' is located in the middle coordinate.

Similarly, the second judging unit 620 can further judge the second coordinate Y2′ of the second touch TU2 according to the value VA22 of the second touch signal S2 in another second conductive pattern and the value VA23 in another third conductive pattern. It is left or right (that is, the second information SI2). For example, when the result of VA22-VA23 is greater than the first critical value TH1, it is judged that Y2' is close to the left coordinate; when the result of VA22-VA23 is smaller than the second critical value TH2, it is judged that Y2' is close to the right coordinate; And when the result of VA22-VA23 is between the first critical value TH1 and the second critical value TH2, it is determined that Y2' is located in the middle coordinate.

Please note that the above-mentioned critical values TH1 and TH2 are not fixed, and can be adjusted according to actual requirements and practical applications. Those skilled in the art should understand that without departing from the spirit of the present invention, various changes in the threshold values TH1 and TH2 are feasible.

Finally, the third judging unit 630 can use the first information SI1 to determine the first position P1 of the first contact TU1 according to the first coordinate X1' and the second coordinate Y1' of the first contact TU1 to be located at (X1', Y1' ), and use the second information SI2 to determine that the second position P2 of the second contact TU2 is located on (X2', Y2') according to the first coordinate X2' and the second coordinate Y2' of the second contact TU2.

The above example takes the transparent conductive layer 300 in FIG. 3 as an example, but it is only one example used to illustrate the technical features of the present invention. Those skilled in the art should understand that this is not a limitation of the present invention.

Please refer to FIG. 7, FIG. 7 is a flow chart of an example of the operation of the method for judging the position of multiple touches according to the present invention, which includes the following steps (please note that if roughly the same result can be obtained, the following steps are not limited to be based on the figure 7 to execute in the order shown):

Step 702: start.

Step 704: Provide a touch panel, the touch panel includes a transparent conductive layer with multiple sets of first conductive patterns, multiple sets of second conductive patterns and multiple sets of third conductive patterns, each set of first conductive patterns along a Arranged in the first direction, each group of second conductive patterns is arranged along a second direction different from the first direction and each group of second conductive patterns is located on a first side of the second direction, and each group of third conductive patterns Patterns are arranged along the second direction and each group of third conductive patterns is located on a second side of the second direction relative to the first side, wherein each group of first conductive patterns, each group of second conductive patterns and Each group of third conductive patterns is electrically insulated from each other, the area of each second conductive pattern in each group of second conductive patterns is different, and the area of each third conductive pattern in each group of third conductive patterns is different .

Step 706 : Use the touch panel to detect a first touch and a second touch to generate a first touch signal and a second touch signal respectively.

Step 708: Read the first and second touch signals of the touch panel to generate a control signal.

Step 710: Determine a first position of the first contact and a second position of the second contact according to the control signal.

Step 712 : Execute a corresponding specific function according to the first contact at the first position and the second contact at the second position.

For each step shown in FIG. 7, please match each component shown in FIG. 5 to understand how each component operates. For the sake of brevity in the description, the operation of each step in FIG. 7 will not be repeated. Wherein, step 706 is executed by the touch panel 510 , steps 708 and 710 are executed by the control circuit 540 , and step 712 is executed by the micro-processing unit 550 .

Please note that the above example is only used to illustrate the application of the present invention, and is not a limitation of the present invention. Those skilled in the art should understand that without violating the spirit of the present invention, the steps of the process in Figure 7 can be added with other or several steps can be combined into a single step. For example, step 710 may further include multiple detailed steps. Please refer to FIG. 8. FIG. 8 is a flow chart illustrating the detailed steps of the step of determining the first position of the first contact and the second position of the second contact in FIG. 7 (that is, step 710), which includes (but does not limited to) the following steps:

Step 810: Determine a first coordinate of the first contact according to a first value of the first touch signal in a first conductive pattern. Next, step 812 is executed.

Step 812 : Determine a second coordinate of the first touch according to a third value of the first touch signal on a second conductive pattern and a fourth value on a third conductive pattern. Next, step 830 is executed.

Step 820: Determine a first coordinate of the second touch according to a second value of the second touch signal in another first conductive pattern. Next, step 822 is executed.

Step 822 : Determine a second coordinate of the second touch according to a fifth value of the second touch signal in another second conductive pattern and a sixth value in another third conductive pattern. Next, step 830 is executed.

Step 830: Generate first information related to whether the first contact is left or right according to the third and fourth values, and generate information related to whether the second contact is left or right according to the fifth and sixth values Right second information. Execute steps 840, 850.

Step 840: Use the first information to determine the first position of the first contact according to the first and second coordinates of the first contact.

Step 850 : Use second information to determine the second position of the second contact according to the first and second coordinates of the second contact.

For the steps shown in FIG. 8, please match the components shown in FIG. 6 to understand how the components operate. For the sake of brevity in the description, the operations of the steps in FIG. 8 will not be repeated. Wherein, steps 810 and 820 are performed by the first determination unit 610 , steps 812 , 822 and 830 are performed by the second determination unit 620 , and steps 840 and 850 are performed by the third determination unit 630 .

Please note that the above-mentioned steps 810-850 are only used to illustrate the application of the present invention, and are not limitations of the present invention. Those skilled in the art should understand that without violating the spirit of the present invention, other methods that can achieve the same The steps of judging the first position of the first contact and the second position of the second contact are practiced in a manner consistent with the spirit disclosed in the present invention. In addition, the steps in the flow charts in FIG. 7 and FIG. 8 are not limited to be executed in the order shown in the embodiment, and appropriate adjustments can be made to obtain desired results. For example, the execution order of step 810 and step 812 can be reversed, and the execution order of step 820 and step 822 can also be reversed, which also belongs to the scope of the present invention.

The above-mentioned embodiments are only used to illustrate the technical features of the present invention, and are not intended to limit the scope of the present invention. As can be seen from the above, the present invention provides a touch panel with an asymmetric conductive pattern and an associated device and method for determining the position of multiple touches. By utilizing the touch panel with asymmetric conductive patterns (such as indium tin oxide (ITO) or indium zinc oxide (IZO)) disclosed in the present invention, since the second conductive patterns 370, 470 on the same position And the areas of the third conductive patterns 380, 480 are different, and the amount of capacitance change produced by them will also be different. Therefore, the second conductive patterns 370, 470 and the third conductive patterns 380, 480 at the same position can be used to generate To determine whether the position of the contact point is on the left/up or on the right/down by the amount of capacitance change. In this way, when there are two (or more than two) contact points on the touch panel at the same time, the recognition system of the touch panel disclosed in the present invention can easily distinguish the actual coordinates of these contact points, so as to avoid the previous An issue where coordinates were reported incorrectly in technology. In addition, the device and mechanism disclosed in the present invention are not only simple to implement, but also do not increase the cost of hardware production.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (15)

1. A touch panel with an asymmetric conductive pattern, comprising: a substrate; and A transparent conductive layer, formed on the substrate, includes: Multiple sets of first conductive patterns, each set of first conductive patterns are arranged along a first direction; A plurality of sets of second conductive patterns, each set of second conductive patterns is arranged along a second direction different from the first direction, and each set of second conductive patterns is located on a first side of the second direction; Multiple groups of third conductive patterns, each group of third conductive patterns are arranged along the second direction, and each group of third conductive patterns is located on a second side of the second direction, the second side is opposite to the first side, wherein each group of first conductive patterns, each group of second conductive patterns and each group of third conductive patterns are electrically insulated from each other, and the area of each second conductive pattern in each group of second conductive patterns is different, And the area of each third conductive pattern in each group of third conductive patterns is different; a plurality of first wires, each first wire is used to electrically connect a plurality of first conductive patterns in the same group; a plurality of second wires, each second wire is used to electrically connect a plurality of second conductive patterns in the same group; and A plurality of third wires, each third wire is used to electrically connect a plurality of third conductive patterns in the same group. 2. The touch panel as claimed in claim 1, wherein the first direction is an X direction, and the second direction is a Y direction. 3. The touch panel as claimed in claim 1, wherein the first direction is a Y direction, and the second direction is an X direction. 4. The touch panel according to claim 1, wherein the plurality of sets of first conductive patterns, the plurality of sets of second conductive patterns and the plurality of sets of third conductive patterns are made of indium tin oxide or indium zinc oxide; And the touch panel is a capacitive touch panel. 5. A touch device capable of judging the position of multiple touches, comprising: A touch panel has an asymmetric conductive pattern, and the touch panel includes: a substrate; A transparent conductive layer, formed on the substrate, includes: Multiple sets of first conductive patterns, each set of first conductive patterns are arranged along a first direction; A plurality of sets of second conductive patterns, each set of second conductive patterns is arranged along a second direction different from the first direction, and each set of second conductive patterns is located on a first side of the second direction; Multiple groups of third conductive patterns, each group of third conductive patterns are arranged along the second direction, and each group of third conductive patterns is located on a second side of the second direction, the second side is opposite to the first side, wherein each group of first conductive patterns, each group of second conductive patterns and each group of third conductive patterns are electrically insulated from each other, and the area of each second conductive pattern in each group of second conductive patterns is different, And the area of each third conductive pattern in each group of third conductive patterns is different; a plurality of first wires, each first wire is used to electrically connect a plurality of first conductive patterns in the same group; a plurality of second wires, each second wire is used to electrically connect a plurality of second conductive patterns in the same group; and a plurality of third wires, each third wire is used to electrically connect a plurality of third conductive patterns in the same group; and A plurality of sensing units are used to detect a first touch and a second touch to generate a first touch signal and a second touch signal respectively; A control circuit, coupled to the touch panel, used to read the first and second touch signals of the touch panel to generate a control signal, and judge a first touch of the first touch according to the control signal a location and a second location of the second contact; and A micro-processing unit, coupled to the control circuit, is used to execute a corresponding specific function according to the first contact at the first position and the second contact at the second position. 6. The touch-sensitive device as claimed in claim 5, wherein the control circuit further comprises: A first judging unit, used to obtain a first coordinate of the first touch according to a first value of the first touch signal in a first conductive pattern, and obtain a first coordinate of the first touch according to the second touch signal in another first value a second value of a conductive pattern to obtain a first coordinate of the second contact; a second judging unit, used to obtain a second coordinate of the first touch according to a third value of the first touch signal in a second conductive pattern and a fourth value in a third conductive pattern, A second coordinate of the second contact is obtained according to a fifth value of the second touch signal in another second conductive pattern and a sixth value in another third conductive pattern, according to the third and the first four values to generate a first information related to the position of the first contact, and generate a second information related to the position of the second contact according to the fifth and sixth values; and A third judging unit, used to use the first information to determine the first position of the first contact according to the first and second coordinates of the first contact, and use the second information to determine the first position of the first contact according to the second coordinates The first and second coordinates of determine the second position of the second contact. 7. The touch-sensitive device as claimed in claim 5, wherein the first direction is an X direction, and the second direction is a Y direction. 8. The touch-sensitive device as claimed in claim 5, wherein the first direction is a Y direction, and the second direction is an X direction. 9. The touch-sensitive device according to claim 5, wherein the multiple sets of first conductive patterns, the multiple sets of second conductive patterns and the multiple sets of third conductive patterns are made of indium tin oxide or indium zinc oxide ;as well as Wherein the touch panel is a capacitive touch panel, and the first touch signal and the second touch signal include capacitance variation. 10. A method for determining the position of a multi-touch, comprising: Provide a touch panel, the touch panel includes a transparent conductive layer with multiple sets of first conductive patterns, multiple sets of second conductive patterns and multiple sets of third conductive patterns, each set of first conductive patterns along a first direction Arranged, each group of second conductive patterns is arranged along a second direction different from the first direction and each group of second conductive patterns is located on a first side of the second direction, and each group of third conductive patterns is arranged along the first direction The second direction is arranged and each group of third conductive patterns is located on a second side of the second direction relative to the first side, wherein each group of first conductive patterns, each group of second conductive patterns, and each group The third conductive patterns are electrically insulated from each other, the area of each second conductive pattern in each group of second conductive patterns is different, and the area of each third conductive pattern in each group of third conductive patterns is different; using the touch panel to detect a first touch and a second touch to generate a first touch signal and a second touch signal respectively; reading the first and second touch signals of the touch panel to generate a control signal; judging a first position of the first contact and a second position of the second contact according to the control signal; and A corresponding specific function is executed according to the first contact at the first position and the second contact at the second position. 11. The method of claim 10, wherein the step of determining the first position of the first contact comprises: obtaining a first coordinate of the first contact according to a first value of the first touch signal in a first conductive pattern; obtaining a second coordinate of the first touch according to a third value of the first touch signal in a second conductive pattern and a fourth value in a third conductive pattern; generating a first information related to the position of the first contact according to the third and fourth values; and The first information is used to determine the first position of the first contact according to the first and second coordinates of the first contact. 12. The method of claim 10, wherein the step of determining the second position of the second contact comprises: obtaining a first coordinate of the second touch according to a second value of the second touch signal in another first conductive pattern; obtaining a second coordinate of the second touch according to a fifth value of the second touch signal in another second conductive pattern and a sixth value in another third conductive pattern; generating a second information related to the location of the second contact according to the fifth and sixth values; and The second information is used to determine the second position of the second contact according to the first and second coordinates of the second contact. 13. The method of claim 10, wherein the first direction is an X direction, and the second direction is a Y direction. 14. The method of claim 10, wherein the first direction is a Y direction, and the second direction is an X direction. 15. The method as claimed in claim 10, wherein the touch panel is a capacitive touch panel, and the first touch signal and the second touch signal include capacitance variation.

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