TWI755097B - Electronic device with touch sensing function and touch sensing method - Google Patents

Abstract

An electronic device with touch sensing function is provided, in which includes multiple touch sensing structures arranged along an X-axis. Each touch sensing structure includes a first electrode, a second electrode, and a third electrode. The first electrode includes an upper half electrode and a lower half electrode coupled with each other. The upper half electrode and the lower half electrode are extended toward each other along a Y-axis and are both substantially triangular, in which the X-axis are substantially perpendicular to the Y-axis. The second electrode is substantially triangular, in which a first side and a second side of the second electrode face to the upper half electrode and the lower half electrode, respectively. The third electrode is disposed between the lower half electrode and the first side of the second electrode, in which the third electrode is substantially strip-shaped.

Description

Electronic device with touch function and touch sensing method

The present disclosure relates to an electronic device with touch function and a touch sensing method thereof, and more particularly, to an in-cell touch electronic device and a touch sensing method thereof.

The in-cell touch technology can make the touch module inside the display, so that the device as a whole has the advantages of thinness and high brightness. The operating principle of the common in-cell touch display on the market is to perform self-capacitive touch sensing through a plurality of rectangular touch electrodes arranged in an internal matrix, and each touch electrode needs a separate trace to The sensing result is transmitted to the touch chip. However, as the demand for touch resolution gradually increases, the number of channels of a common touch chip is insufficient to support this design method, and the touch electrodes are easily short-circuited with each other due to a large number of dense wirings.

The present disclosure provides an electronic device with touch function, which includes a plurality of touch structures arranged along an X axis. Each touch structure includes a first electrode, a second electrode and a third electrode. The first electrode includes an upper half electrode and a lower half electrode coupled to each other. The upper half electrode and the lower half electrode extend toward each other along the Y axis and are substantially triangular, and the X axis is substantially orthogonal to the Y axis. The second electrode is substantially triangular, and the first side and the second side of the second electrode face the lower half electrode and the upper half electrode, respectively. The third electrode is located between the lower half electrode and the first side of the second electrode, and the third electrode is substantially elongated.

The present disclosure provides a touch sensing method, which is suitable for an electronic device with touch function. The electronic device includes a plurality of touch structures arranged along the X axis and used for sensing touch input. The touch sensing method includes the following process: if the capacitance value of the first electrode and the capacitance value of the second electrode of one of the plurality of touch structures change, according to one of the plurality of touch structures, the X-axis The position determines the position of the touch input on the X axis, and the first electrode includes an upper half electrode and a lower half electrode coupled to each other, and the upper half electrode and the lower half electrode extend toward each other along the Y axis and are substantially both is triangular, the X axis is substantially orthogonal to the Y axis, the second electrode is substantially triangular, and the first side and the second side of the second electrode face the lower half electrode and the upper half electrode respectively; If the capacitance value changes, it is determined that the position of the touch input on the Y-axis corresponds to the lower half electrode, and the third electrode is located between the lower half electrode and the first side of the second electrode and is substantially elongated; if The capacitance value of the third electrode does not change, then it is determined that the position of the touch input on the Y axis corresponds to the upper half electrode; and it is known that the position of the touch input on the Y axis corresponds to the upper half electrode or the lower half electrode In the case of an electrode, the position of the touch input on the Y-axis is further determined according to the change of the capacitance value of the first electrode and the change of the capacitance value of the second electrode.

One of the advantages of the above embodiment is that the number of traces required for the touch electrodes to receive and output signals is greatly reduced.

The embodiments of the present disclosure will be described below in conjunction with the relevant drawings. In the drawings, the same reference numbers refer to the same or similar elements or method flows.

FIG. 1 is a simplified functional block diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 has a self-capacitive touch function, and includes a control circuit 101 , a plurality of traces 103 , and a plurality of touch structures 10_1 to 10_n arranged along the X-axis. The respective capacitance values of the touch structures 10_1 to 10_n are changed according to the touch input, wherein the touch input may be the user approaching or approaching the electronic device 100 with a finger. The capacitance value change of the touch structures 10_1 to 10_n is transmitted to the control circuit 101 through the trace 103, and the control circuit 101 is used to calculate the position of the touch input on the X axis and the Y axis according to the received capacitance value change. where the X axis is substantially orthogonal to the Y axis.

In some embodiments, the electronic device 100 further includes various elements for realizing display functions, such as one or more of a glass substrate, a backlight module, and a pixel circuit. For the sake of brevity, the connection relationship between these elements is not shown. shown in Figure 1. The touch structures 10_1 to 10_n are disposed in the active area AA of the electronic device 100 for providing a display image, and partially extend outside the active area AA to be coupled to the control circuit 101 through the wires 103 , but this disclosure is not intended to be the case. limit. In some embodiments, the touch structures 10_1 - 10_n are completely disposed in the active area AA, and the traces 103 extend into the active area to be coupled to the touch structures 10_1 - 10_n.

In practice, the control circuit 101 can be implemented using a general touch chip, or can also be implemented using a touch and display driver integration chip (Touch and Display Driver Integration, TDDI for short). The touch structures 10_1 to 10_n can be implemented by various suitable transparent conductive films, such as indium tin oxide (ITO) films or Al-doped Zno (AZO) films.

As shown in FIG. 1 , each of the touch structures 10_1 to 10_n has a first electrode 110 , a second electrode 120 and a third electrode 130 . The first electrode 110 includes a lower half electrode 112 and an upper half electrode 114 coupled to each other, wherein the lower half electrode 112 and the upper half electrode 114 extend toward each other along the Y axis, and both are substantially triangular. In some embodiments, the width of the lower half electrode 112 gradually narrows in the direction toward the upper half electrode 114 , and the width of the upper half electrode 114 gradually narrows in the direction toward the lower half electrode 112 . That is, the lower half electrode 112 and the upper half electrode 114 are coupled to each other in the electrical connection region 105 at their respective vertices. In other embodiments, the shape of the lower half electrode 112 and the upper half electrode 114 is a right triangle.

The second electrode 120 is substantially triangular with a first side 122, a second side 124 and a third side 126, and the first side 122 and the second side 124 of the second electrode 120 face the lower half electrode 112 and the upper half electrode, respectively External electrode 114 . In some embodiments, the width of the second electrode 120 is gradually narrowed in the direction toward the electrical connection region 105 , that is, one of the vertices of the second electrode 120 points to the electrical connection region 105 . In other embodiments, the first electrodes 110 and the second electrodes 120 are substantially arranged to form a rectangle, that is, the first electrodes 110 and the second electrodes 120 have shapes that can be fitted with each other, and the second electrodes 120 The shape is an obtuse triangle.

As shown in FIG. 1 , the first electrode 110 and the second electrode 120 are not in direct contact, and there is a V-shaped gap therebetween, and the third electrode 130 is disposed in the V-shaped gap. In some embodiments, the third electrode 130 is substantially elongated and located between the lower half electrode 112 and the first side 122 of the second electrode 120 . In other embodiments, the length obtained by projecting the third electrode 130 to the Y axis is substantially equal to the length obtained by projecting the lower half electrode 112 to the Y axis. Taking the touch structure 10_1 as an example, the third electrode 130 extends from the edge of the touch structure 10_1 on the X axis along the V-shaped gap toward the electrical connection region 105 , and can enter but not exceed the electrical connection region 105 . range, the third electrodes 130 of the touch structures 10_2 to 10_n also have a similar arrangement, which will not be repeated here. In addition, the third electrode 130 is also not in direct contact with the first electrode 110 and the second electrode 120 .

In the embodiment of FIG. 1 , two adjacent touch structures 10_1 to 10_n are adjacent to each other with the first electrode 110 and the second electrode 120 respectively. For example, in the case of the touch structures 10_1 and 10_2, the lower half electrodes 112 and the upper half electrodes 114 of the touch structure 10_1 are adjacent to the third side 126 of the second electrodes 120 of the touch structure 10_2 (eg, , the longest side of the second electrode 120). For another example, for the touch structures 10_2 and 10_3, the lower half electrodes 112 and the upper half electrodes 114 of the touch structure 10_2 are adjacent to the third side 126 of the second electrodes 120 of the touch structure 10_3, And so on for the rest. In order to make the drawings concise and easy to describe, the first electrode 110 , the second electrode 120 and the third electrode 130 in FIG. 1 are shown as being connected to only one trace 103 each, but the present disclosure is not limited to this . In some embodiments, in order to increase reliability and reduce impedance, each of the first electrode 110 , the second electrode 120 and the third electrode 130 may be connected to more than two traces 103 .

FIG. 2 is an enlarged schematic view of the area 107 in FIG. 1 . In some embodiments, the first electrode 110 , the second electrode 120 and the third electrode 130 are used to provide voltages required for operation of the plurality of pixel circuits PX of the plurality of pixel circuits PX of the electronic device 100 . Therefore, at least one edge of the first electrode 110 , at least one edge of the second electrode 120 and at least one edge of the third electrode 130 are zigzag, so that their position projections correspond to the plurality of pixel circuits PX. The symbols R, G and B in the squares of each pixel circuit PX in Fig. 2 represent that the pixel circuit PX is used to emit red light, green light and blue light respectively, but the color arrangement of the pixel circuit PX of this disclosure document And the combination is not limited to this.

In detail, on the plane where the X axis and the Y axis lie, at least one edge of the first electrode 110 includes a plurality of first protrusions 210 , at least one edge of the second electrode 120 includes a plurality of second protrusions 220 , and At least one edge of the third electrode 130 includes a plurality of third protrusions 230 . Each of these first protrusions 210 , second protrusions 220 and third protrusions 230 overlaps the projection of the corresponding one or more pixel circuits PX in the Z-axis direction, wherein the Z-axis is substantially orthogonal to X axis and Y axis.

In addition, in some embodiments, the gaps between the first electrode 110 , the second electrode 120 and the third electrode 130 do not overlap with the projection of the pixel circuit PX in the Z-axis direction.

Fig. 3 is a simplified schematic cross-sectional view in an embodiment along the line A-A' in Fig. 2 . In this embodiment, the pixel circuit PX is a liquid crystal pixel circuit, and the electronic device 100 sequentially includes a first polarizing layer 302 , a lower glass substrate 304 , a transparent conductive film layer 306 , an insulating layer 308 , and a thin film transistor from bottom to top. layer 310 , a liquid crystal layer 312 , a plurality of color filters 314r , 314g and 314b , an upper glass substrate 316 , a second polarizing layer 318 and a cover glass 320 . The touch structures 10_2 to 10_n in FIG. 1 can be disposed on the transparent conductive film layer 306 and used to provide a common voltage for each pixel circuit PX. In the liquid crystal display technology, the common voltage can be used to realize the polarity inversion driving and to stabilize the voltage across the liquid crystal capacitor. The function of the common voltage is well known to those skilled in the art. Repeat.

Fig. 4 is a simplified schematic cross-sectional view of another embodiment along the line A-A' in Fig. 2 . In this embodiment, the pixel circuit PX is an organic light-emitting diode (Organic Light-Emitting Diode, OLED for short) pixel circuit, and the electronic device 100 sequentially includes a lower substrate 402, a metal conductive layer 404, a plurality of The organic light-emitting layers 406r, 406g and 460b, the transparent conductive thin film layer 408 and the upper substrate 410. The touch structures 10_2 to 10_n in FIG. 1 may be disposed on the transparent conductive film layer 408 and coupled to the cathodes of the organic light emitting layers 406r, 406g and 460b. In some embodiments, the positions of the metal conductive layer 404 and the transparent conductive thin film layer 408 can be interchanged. In this case, the touch structures 10_2 to 10_n in FIG. 1 are coupled to the anodes of the organic light emitting layers 406r, 406g and 460b.

FIG. 5 is a flowchart of a touch sensing method 500 according to an embodiment of the present disclosure. The electronic device 100 (or its control circuit 101 ) of FIG. 1 can be used to execute the touch sensing method 500 to calculate the precise position of the touch input on the electronic device 100 . In the process S502, the control circuit 101 determines whether the capacitance values of the first electrode 110 and the second electrode 120 of one of the touch structures 10_2 to 10_n are changed. If so, the control circuit 101 will then execute the process S504. If not, the control circuit 101 may end executing the touch sensing method 500, or may repeatedly execute the process S502. For the convenience of description, in the following, the capacitance value of the first electrode 110 and the second electrode 120 in the touch structures 10_2 to 10_n which are changed is referred to as “target touch structure 10” for short.

In the process S504, the control circuit 101 determines the position of the target touch structure 10 on the X axis as the position of the touch input on the X axis. Next, in the process S506, the control circuit 101 determines whether the capacitance value of the third electrode 130 of the target touch control structure 10 changes. If so, the control circuit 101 will then execute the processes S508 to S510. If not, the control circuit 101 will then execute the processes S512 to S514.

Please refer to FIG. 5 and FIG. 6A at the same time, in the process S508, since the capacitance value of the third electrode 130 changes, the control circuit 101 determines that the position of the touch input (eg, the user's finger 610) corresponds to the lower half External electrode 112 . In the process S510 , when it is determined that the position of the touch input corresponds to the lower half electrode 112 , the control circuit 101 will determine the difference between the capacitance value change of the first electrode 110 and the capacitance value change of the second electrode 120 according to the The relationship further determines the precise position of the touch input on the Y axis.

For example, as shown in FIG. 6A , since the capacitance change of the first electrode 110 is smaller than the capacitance change of the second electrode 120 and the capacitance of the third electrode 130 changes, the control circuit 101 can know that the touch The area of the input corresponding to the first electrode 110 is smaller, while the area corresponding to the second electrode 120 is larger, and its position corresponds to the lower half electrode 112 . Therefore, the control circuit 101 determines that the position of the touch input is lower than the middle of the target touch structure 10 .

Similarly, please refer to FIG. 5 and FIG. 6B at the same time, in the process S512 , since the capacitance value of the third electrode 130 does not change, the control circuit 101 determines the position of the touch input (eg, the user's finger 610 ) Corresponds to the upper half electrode 114 . In the process S514 , when it is determined that the position of the touch input corresponds to the upper half electrode 114 , the control circuit 101 will determine the difference between the capacitance value change of the first electrode 110 and the capacitance value change of the second electrode 120 according to the The relationship further determines the precise position of the touch input on the Y axis.

For example, as shown in FIG. 6B , since the capacitance change of the first electrode 110 is smaller than the capacitance change of the second electrode 120 , and the capacitance of the third electrode 130 does not change, the control circuit 101 can know that the touch The area of the input corresponding to the first electrode 110 is smaller, while the area corresponding to the second electrode 120 is larger, and its position corresponds to the upper half electrode 114 . Therefore, the control circuit 101 will determine that the position of the touch input is above the middle of the target touch structure 10 .

The control circuit 101 executes the process S516 after the process S510 or S514 ends, so as to output the precise position of the touch input on the X-axis and the Y-axis (ie, on the electronic device 100 ). After the process S516 ends, the control circuit 101 may end executing the touch sensing method 500, or execute the aforementioned process S502 again.

It can be seen from the above that, compared with the conventional touch structure formed only by two triangular electrodes, the third electrode 130 in the above-mentioned embodiments enables the control circuit 101 to know in advance that the touch input is located at the target touch structure 10 The upper or lower half reduces the calculation area of the control circuit 101 by approximately half. Therefore, the electronic device 100 can achieve more than twice the accuracy of the conventional touch device with an analog-to-digital converter (ADC) of the same resolution.

FIG. 7 is a simplified functional block diagram of an electronic device 700 according to an embodiment of the present disclosure. The electronic device 700 is similar to the electronic device 100 , except that the arrangement of the touch structures 10_2 to 10_n in the electronic device 700 is different from that of the electronic device 100 . In detail, in the electronic device 700 , two adjacent touch structures 10_1 to 10_n are adjacent to each other by the first electrode 110 , or adjacent to each other by the second electrode 120 . For example, the third sides 126 of the second electrodes 120 of the touch structures 10_1 and 10_2 are adjacent to each other. For another example, the first electrodes 110 of the touch structures 10_2 and 10_3 are adjacent to each other.

The remaining connection methods, components, implementations, and advantages of the aforementioned electronic device 100 are all applicable to the electronic device 700 , and are not repeated here for brevity. In addition, the electronic device 700 can also be used to execute the touch sensing method 500 .

FIG. 8 is a simplified functional block diagram of an electronic device 800 according to an embodiment of the present disclosure. The electronic device 800 has a self-capacitive touch function, and includes a control circuit 101 , a plurality of traces 103 , and a plurality of touch structures 80_1 to 80_n arranged along the X axis. Each of the touch structures 80_1 to 80_n includes a first electrode 810 , a second electrode 820 , a third electrode 830 , a fourth electrode 840 and a fifth electrode 850 . The first electrode 810 includes a lower half electrode 812 and an upper half electrode 814 coupled to each other, wherein the lower half electrode 812 and the upper half electrode 814 extend toward each other along the Y axis, and both are substantially triangular. In some embodiments, the width of the lower half electrode 812 gradually narrows in the direction toward the upper half electrode 814 , and the width of the upper half electrode 814 gradually narrows in the direction toward the lower half electrode 812 . That is, the lower half electrode 812 and the upper half electrode 814 are coupled to each other in the electrical connection region 805 at their respective vertices. In other embodiments, the shapes of the lower half electrodes 112 and the upper half electrodes 114 are acute triangles.

The second electrode 820 is substantially triangular with a first side 822, a second side 824 and a third side 826, and the first side 822 and the second side 824 of the second electrode 820 face the lower half electrode 812 and the upper half, respectively External electrode 814. In some embodiments, the width of the second electrode 820 gradually narrows in the direction toward the electrical connection region 805 , that is, one vertex of the second electrode 820 points to the electrical connection region 805 .

As shown in FIG. 8 , the first electrode 810 and the second electrode 820 are not in direct contact, and there is a V-shaped gap between them, and the third electrode 830 is disposed between the first electrode 810 and the second electrode 820 in the V-shaped gap. In some embodiments, the third electrode 830 is substantially elongated and located between the lower half electrode 812 and the first side 822 of the second electrode 820 . In other embodiments, the length obtained by projecting the third electrode 830 to the Y axis is substantially equal to the length obtained by projecting the lower half electrode 812 to the Y axis. Taking the touch structure 80_1 as an example, the third electrode 830 extends from the edge of the touch structure 80_1 on the X axis along the V-shaped gap between the first electrode 810 and the second electrode 820 toward the electrical connection region 805 , which can enter but not exceed the range of the electrical connection region 805 , and the third electrodes 830 of the touch structures 80_2 to 80_n also have a similar arrangement, which will not be repeated here. In addition, the third electrode 830 is also not in direct contact with the first electrode 810 and the second electrode 820 .

The fourth electrode 840 is substantially triangular with a first side 842, a second side 844 and a third side 846, and the first side 842 and the second side 844 of the fourth electrode 840 face the lower half electrode 812 and the upper half, respectively External electrode 814. In some embodiments, the width of the fourth electrode 840 is gradually narrowed in the direction toward the electrical connection region 805 , that is, one of the vertexes of the fourth electrode 840 points to the electrical connection region 805 . In this embodiment, the first electrode 810 is located between the second electrode 820 and the fourth electrode 840 . In some embodiments, the first electrode 810 , the second electrode 820 and the fourth electrode 840 are arranged to form a rectangle, that is, the second electrode 820 and the fourth electrode 840 are axisymmetric with the first electrode 810 as the center of symmetry arrangement. In other embodiments, the second electrode 820 and the fourth electrode 840 are obtuse-angled triangles.

As shown in FIG. 8 , the first electrode 810 and the fourth electrode 840 are not in direct contact, and there is a V-shaped gap between them, and the fifth electrode 850 is arranged between the first electrode 810 and the fourth electrode 840 in the V-shaped gap. In some embodiments, the fifth electrode 850 is substantially elongated and located between the lower half electrode 812 and the first side of the fourth electrode 840 . In other embodiments, the length obtained by projecting the fifth electrode 850 to the Y axis is substantially equal to the length obtained by projecting the lower half electrode 812 to the Y axis. Taking the touch structure 80_1 as an example, the fifth electrode 850 thereof extends from the edge of the touch structure 80_1 on the X axis along the V-shaped gap between the first electrode 810 and the fourth electrode 840 toward the electrical connection region 805 , which can enter but not exceed the range of the electrical connection area 805 , and the fifth electrodes 850 of the touch structures 80_2 to 80_n also have a similar arrangement, which will not be repeated here. In addition, the fifth electrode 850 is also not in direct contact with the first electrode 810 and the fourth electrode 840 .

In the embodiment shown in FIG. 8 , two adjacent touch structures 80_2 to 80_n are adjacent to each other with the second electrode 820 and the fourth electrode 840 respectively. For example, in the case of the touch structures 80_1 and 80_2, the third side 846 of the fourth electrode 840 of the touch structure 80_1 is adjacent to the third side 826 of the second electrode 820 of the touch structure 80_2. For another example, for the touch structures 80_2 and 80_3, the third side 846 of the fourth electrode 840 of the touch structure 80_2 is adjacent to the third side 826 of the second electrode 820 of the touch structure 80_3, and the rest depend on And so on.

For the sake of simplicity and ease of illustration, the first electrode 810 , the second electrode 820 , the third electrode 830 , the fourth electrode 840 and the fifth electrode 850 in FIG. 8 are shown as being connected to only one trace 103 each. , but this disclosure document is not limited to this. In some embodiments, in order to increase reliability and reduce impedance, each of the first electrode 810 , the second electrode 820 , the third electrode 830 , the fourth electrode 840 and the fifth electrode 850 may be connected to more than two traces 103 .

The remaining connection methods, components, implementations, and advantages of the aforementioned electronic device 100 are all applicable to the electronic device 800 , and are not repeated here for the sake of brevity. For example, each of the first electrode 810 , the second electrode 820 , the third electrode 830 , the fourth electrode 840 and the fifth electrode 850 may have at least one jagged edge to project a plurality of pixel circuits PX corresponding to the display device 800 , and supply the operating voltage required by the pixel circuits PX. For example, when the pixel circuit PX is a liquid crystal pixel circuit, the first electrode 810 to the fifth electrode 850 are used for supplying a common voltage. For another example, when the pixel circuit PX is an organic light emitting diode pixel circuit, the first electrode 810 to the fifth electrode 850 are used to supply the system high voltage (VDD) or the system low voltage (VSS). That is, at least one edge of the first electrode 810, the second electrode 820, the third electrode 830, the fourth electrode 840 and the fifth electrode 850 includes a plurality of protrusions, and each of these protrusions overlaps one or more The projection of the corresponding pixel circuit PX on the Z-axis direction. In addition, in some embodiments, the gaps between the first electrode 810 , the second electrode 820 , the third electrode 830 , the fourth electrode 840 and the fifth electrode 850 do not overlap with the gap of the pixel circuit PX in the Z-axis direction. projection.

FIG. 9 is a flowchart of a touch sensing method 900 according to an embodiment of the present disclosure. The electronic device 800 (or its control circuit 101 ) can be used to execute the touch sensing method 900 to calculate the precise position of the touch input on the electronic device 800 . In the process S902, the control circuit 101 determines whether the capacitance values of the first electrode 810 and the second electrode 820 of one of the touch structures 80_2 to 80_n are changed. If not, the control circuit 101 will then execute the process S904. If so, the control circuit 101 will execute the process S906.

In the process S904, the control circuit 101 determines whether the capacitance values of the first electrode 810 and the fourth electrode 840 of one of the touch structures 80_2 to 80_n are changed. If so, the control circuit 101 will execute the process S906. If not, the control circuit 101 may end executing the touch sensing method 900, or may execute the process S902 again. For the convenience of description, hereinafter, the capacitance values of the first electrodes 810 and the second electrodes 820 in the touch structures 80_2 to 80_n are changed, or the capacitance values of the first electrodes 810 and the fourth electrodes 840 are changed as “targets” for short. The touch structure 80".

In the process S906, the control circuit 101 determines the position of the target touch structure 80 on the X axis as the position of the touch input on the X axis. Next, in the process S908, the control circuit 101 determines whether the capacitance value of the third electrode 830 or the fifth electrode 850 of the target touch control structure 80 changes. If so, the control circuit 101 will then execute the processes S910 to S912. If not, the control circuit 101 will then execute the processes S914 to S916.

In the process S910 , since the capacitance value of the third electrode 830 or the fifth electrode 850 changes, the control circuit 101 determines that the position of the touch input corresponds to the lower half electrode 812 . In the process S912 , when it is determined that the position of the touch input corresponds to the lower half electrode 812 , the control circuit 101 will determine the difference between the capacitance change of the first electrode 810 and the capacitance change of the second electrode 820 according to the or according to the relationship between the capacitance change of the first electrode 810 and the capacitance change of the fourth electrode 840 , the precise position of the touch input on the Y axis is further determined. The detailed judgment principle is similar to that described above with reference to FIG. 6A , and for the sake of brevity, it is not repeated here.

Similarly, in the process S914 , since the capacitance value of the third electrode 830 or the fifth electrode 850 does not change, the control circuit 101 determines that the position of the touch input corresponds to the upper half electrode 814 . In the process S916 , when it is determined that the position of the touch input corresponds to the upper half electrode 814 , the control circuit 101 will determine the difference between the capacitance change of the first electrode 110 and the capacitance change of the second electrode 120 according to the or according to the relationship between the capacitance change of the first electrode 810 and the capacitance change of the fourth electrode 840 to further determine the precise position of the touch input on the Y axis. The detailed judgment principle is similar to that described above with reference to FIG. 6B , and for the sake of brevity, it is not repeated here.

The control circuit 101 executes the process S918 after the process S912 or S916 ends, so as to output the precise position of the touch input on the X-axis and the Y-axis (ie, on the electronic device 800 ). After the process S918 ends, the control circuit 101 may end executing the touch sensing method 900, or execute the aforementioned process S902 again.

It can be seen from the above that, compared with the conventional touch structure formed only by two triangular electrodes, the third electrode 830 and the fifth electrode 850 in the above embodiments can enable the control circuit 101 to know in advance that the touch input is at the target Touching the upper or lower half of the structure 80 reduces the computing area of the control circuit 101 by approximately half. Therefore, the electronic device 800 can achieve more than twice the accuracy of the conventional touch device with an analog-to-digital converter (ADC) of the same resolution.

In addition, as can be seen from various embodiments of this disclosure, compared to the conventional in-cell touch displays having a plurality of rectangular touch electrodes arranged in a matrix, the electronic devices 100 , 700 and 800 greatly reduce the number of touch electrodes to control The number of the traces 103 of the circuit 101 is helpful to simplify the design of the touch chip, and to reduce the risk of short circuit between the touch electrodes, thereby improving the reliability of the product.

In addition, the touch electrodes of the electronic devices 100 , 700 and 800 do not need to be coupled to the traces 103 through via holes, thereby helping to simplify the process and improve the production yield.

In some embodiments, the electronic devices 100 , 700 and 800 may be smart phones, tablet computers or notebook computers, or may be in-cell touch display panels disposed in the aforementioned devices.

Certain terms are used in the specification and claims to refer to particular elements. However, those of ordinary skill in the art should understand that the same elements may be referred to by different nouns. The description and the scope of the patent application do not use the difference in name as a way of distinguishing elements, but use the difference in function of the elements as a basis for distinguishing. The "comprising" mentioned in the description and the scope of the patent application is an open-ended term, so it should be interpreted as "including but not limited to". In addition, "coupled" herein includes any direct and indirect means of connection. Therefore, if it is described in the text that the first element is coupled to the second element, it means that the first element can be directly connected to the second element through electrical connection or signal connection such as wireless transmission or optical transmission, or through other elements or connections. The means are indirectly electrically or signally connected to the second element.

The size and relative size of some of the illustrated elements may be exaggerated, or the shapes of some of the elements may be simplified so as to more clearly convey the content of the embodiments. Therefore, unless otherwise specified by the applicant, the shape, size, relative size and relative position of each element in the figures are only for convenience of description, and should not be used to limit the patent scope of the present disclosure. Furthermore, the present disclosure may be embodied in many different forms, and the present disclosure should not be limited to the embodiments set forth in this specification in interpreting it.

In addition, unless otherwise specified in the specification, any term in the singular also includes the meaning in the plural.

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

10_1~10_n: Touch structure 100,700: Electronic devices 101: Control circuit 103: Routing 105: Electrical connection area 107: Area 110: The first electrode 112: Lower half electrode 114: Upper electrode 120: Second electrode 122: The first side of the second electrode 124: Second side of second electrode 126: The third side of the second electrode 130: Third electrode X,Y,Z: axis AA: Active area A-A': section line PX: pixel circuit 210: First protrusion 220: Second protrusion 230: Third protrusion 302: The first polarizing layer 304: Lower glass substrate 306: Transparent conductive film layer 308: Insulation layer 310: thin film transistor layer 312: liquid crystal layer 314r, 314g, 314b: Color filters 316: Upper glass substrate 318: Second polarizing layer 320: glass protective layer 402: Lower glass substrate 404: Metal conductive layer 406r, 406g, 406b: organic light-emitting layer 408: Transparent conductive film layer 410: Upper glass substrate 500,900: Touch Sensing Method S502~S516, S902~S918: Process 10,80: Target touch structure 610: Fingers 800: Electronics 80_1~80_n: Touch structure 805: Electrical connection area 810: First electrode 812: Lower half electrode 814: Upper electrode 820: Second electrode 822: First side of second electrode 824: Second side of second electrode 826: Third side of second electrode 830: Third electrode 840: Fourth electrode 842: First side of fourth electrode 844: Second side of fourth electrode 846: Third side of fourth electrode 850: Fifth electrode

FIG. 1 is a simplified functional block diagram of an electronic device according to an embodiment of the present disclosure. FIG. 2 is a partially enlarged schematic view of the electronic device of FIG. 1 . Fig. 3 is a simplified schematic cross-sectional view in an embodiment along the line A-A' in Fig. 2 . Fig. 4 is a simplified schematic cross-sectional view of another embodiment along the line A-A' in Fig. 2 . FIG. 5 is a flowchart of a touch sensing method according to an embodiment of the present disclosure. FIG. 6A is a schematic diagram of capacitance changes in different parts of the touch structure due to touch input. FIG. 6B is another schematic diagram of capacitance changes in different parts of the touch structure due to touch input. FIG. 7 is a simplified functional block diagram of an electronic device according to an embodiment of the present disclosure. FIG. 8 is a simplified functional block diagram of an electronic device according to an embodiment of the present disclosure. FIG. 9 is a flowchart of a touch sensing method according to an embodiment of the present disclosure.

10_1~10_n: Touch structure

100: Electronics

101: Control circuit

103: Routing

105: Electrical connection area

107: Area

110: The first electrode

112: Lower half electrode

114: Upper electrode

120: Second electrode

122: The first side of the second electrode

124: Second side of second electrode

126: The third side of the second electrode

130: Third electrode

X,Y,Z: axis

AA: section line

Claims (21)

An electronic device with touch function, comprising a plurality of touch structures arranged along an X axis, wherein each touch structure comprises: a first electrode including an upper half electrode and a lower half electrode coupled to each other, wherein the upper half electrode and the lower half electrode extend toward each other along a Y axis and are substantially triangular, and the The X-axis is substantially orthogonal to the Y-axis; a second electrode, wherein the second electrode is substantially triangular, and a first side and a second side of the second electrode face the lower half electrode and the upper half electrode, respectively; and A third electrode is located between the lower half electrode and the first side of the second electrode, wherein the third electrode is substantially elongated. The electronic device of claim 1, wherein a length obtained by projecting the third electrode onto the Y axis is substantially equal to a length obtained by projecting the lower half electrode onto the Y axis. The electronic device of claim 1, wherein the upper half electrode gradually narrows in a direction toward the lower half electrode, and the lower half electrode gradually narrows in a direction toward the upper half electrode. The electronic device of claim 1, wherein the second electrode gradually narrows in a direction toward an electrical connection region of the upper half electrode and the lower half electrode. The electronic device of claim 1, wherein the second electrode and the first electrode are substantially arranged to form a rectangle. The electronic device of claim 1, wherein in a first touch structure and a second touch structure adjacent to the plurality of touch structures, the upper half electrode of the first touch structure and the lower half electrode is adjacent to a third side of the second electrode of the second touch control structure. The electronic device of claim 1, wherein in a first touch structure and a second touch structure adjacent to the plurality of touch structures, the second electrode of the first touch structure is A third side is adjacent to a third side of the second electrode of the second touch structure. The electronic device according to claim 7, wherein, in the adjacent second touch structure and a third touch structure among the plurality of touch structures, the first electrodes of the second touch structure and The first electrodes of the third touch structure are adjacent to each other. The electronic device of claim 1, wherein if a touch input changes the capacitance values of the first electrode, the second electrode and the third electrode, the electronic device determines that a position of the touch input corresponds to In the lower half electrode, if the touch input changes the capacitance value of the first electrode and the second electrode and does not change the capacitance value of the third electrode, the electronic device determines that the position of the touch input corresponds to the top half electrode. The electronic device of claim 1, further comprising a plurality of pixel circuits, wherein at least one edge of the first electrode, at least one edge of the second electrode and at least one edge of the third electrode are zigzag, so as to The projections of the first electrode, the second electrode and the third electrode are made to correspond to corresponding ones of the plurality of pixel circuits. The electronic device of claim 10, wherein the at least one edge of the first electrode includes a plurality of first protrusions, the at least one edge of the second electrode includes a plurality of second protrusions, and the third electrode The at least one edge of the includes a plurality of third protrusions, Each of the plurality of first protrusions, the plurality of second protrusions and the plurality of third protrusions overlaps the projections of corresponding one or more of the plurality of pixel circuits on a Z-axis direction , wherein the Z axis is substantially orthogonal to the X axis and the Y axis. The electronic device of claim 10, wherein if the plurality of pixel circuits are liquid crystal pixel circuits, the first electrode, the second electrode and the third electrode are used to provide a common voltage to the plurality of pixels The corresponding multiple in the circuit, If the plurality of pixel circuits are organic light emitting diode pixel circuits, the first electrode, the second electrode and the third electrode are coupled to a plurality of organic Multiple cathodes or multiple anodes of light emitting diodes. The electronic device of claim 1, wherein each touch control structure further comprises: a fourth electrode, wherein the fourth electrode is substantially triangular, a first side and a second side of the fourth electrode face the lower half electrode and the upper half electrode, respectively, and the first electrode is located on the between the second electrode and the fourth electrode; and A fifth electrode is located between the lower half electrode and the first side of the fourth electrode, wherein the fifth electrode is substantially elongated. The electronic device of claim 13, wherein the first electrode, the second electrode and the fourth electrode are substantially arranged to form a rectangle. The electronic device of claim 13, wherein the fourth electrode gradually narrows in a direction toward an electrical connection region of the upper half electrode and the lower half electrode. The electronic device of claim 13, wherein in a first touch structure and a second touch structure adjacent to the plurality of touch structures, the fourth electrode of the first touch structure is A third side is adjacent to a third side of the second electrode of the second touch structure. The electronic device of claim 13, wherein if a touch input changes capacitance values of the first electrode, the fourth electrode and the fifth electrode, the electronic device determines that the touch input is on the Y axis A position corresponding to the lower half electrode, if the touch input changes the capacitance value of the first electrode and the fourth electrode and does not change the capacitance value of the fifth electrode, the electronic device determines that the touch input is in The position of the Y-axis corresponds to the upper electrode half. The electronic device of claim 13, further comprising a plurality of pixel circuits, wherein at least one edge of the first electrode, at least one edge of the second electrode, at least one edge of the third electrode, and at least one edge of the fourth electrode At least one edge of the fifth electrode and at least one edge of the fifth electrode are serrated, so that the projection of the first electrode, the second electrode, the third electrode, the fourth electrode and the fifth electrode corresponds to the plurality of pictures Corresponding ones in the prime circuit. The electronic device of claim 18, wherein the at least one edge of the first electrode includes a plurality of first protrusions, the at least one edge of the second electrode includes a plurality of second protrusions, and the third electrode The at least one edge of the fourth electrode includes a plurality of third protrusions, the at least one edge of the fourth electrode includes a plurality of fourth protrusions, and the at least one edge of the fifth electrode includes a plurality of fifth protrusions, Each of the plurality of first protrusions, the plurality of second protrusions, the plurality of third protrusions, the plurality of fourth protrusions and the plurality of fifth protrusions overlap the plurality of pixels Corresponding projections of one or more of the circuits on a Z-axis direction, wherein the Z-axis is substantially orthogonal to the X-axis and the Y-axis. A touch sensing method is applicable to an electronic device with touch function, wherein the electronic device includes a plurality of touch structures arranged along an X axis and used for sensing a touch input, and the touch sense Test methods include: If the capacitance value of a first electrode and the capacitance value of a second electrode of one of the plurality of touch structures change, it is determined according to a position of the one of the plurality of touch structures on the X axis The touch input is at a position on the X axis, wherein the first electrode includes an upper half electrode and a lower half electrode coupled to each other, the upper half electrode and the lower half electrode are oriented along a Y axis extend from each other and are substantially triangular, and the X-axis is substantially orthogonal to the Y-axis, wherein the second electrode is substantially triangular, and a first side and a second side of the second electrode face the the lower half electrode and the upper half electrode; If the capacitance value of a third electrode changes, it is determined that the position of the touch input on the Y axis corresponds to the lower half electrode, wherein the third electrode is located at the position between the lower half electrode and the second electrode between the first sides and are substantially elongated; If the capacitance value of the third electrode does not change, determining that the position of the touch input on the Y axis corresponds to the upper half electrode; and When it is known that the position of the touch input on the Y axis corresponds to the upper half electrode or the lower half electrode, according to the capacitance value change of the first electrode and the capacitance value of the second electrode The amount of change further determines the position of the touch input on the Y axis. The touch sensing method according to claim 20, further comprising: If the capacitance value of the first electrode and the capacitance value of a fourth electrode of the one of the plurality of touch structures change, according to the position of the one of the plurality of touch structures on the X axis Determine the position of the touch input on the X axis, wherein the fourth electrode is substantially triangular, and a first side and a second side of the fourth electrode face the lower half electrode and the upper half electrode respectively , and the first electrode is located between the second electrode and the fourth electrode; If the capacitance value of a fifth electrode changes, it is determined that the position of the touch input on the Y axis corresponds to the lower half electrode, wherein the fifth electrode is located between the lower half electrode and the fourth electrode between and substantially elongated between the first sides; and If neither the capacitance value of the third electrode nor the capacitance value of the fifth electrode changes, it is determined that the position of the touch input on the Y axis corresponds to the upper half electrode; The position of the touch input on the Y axis is determined according to the capacitance value change of the first electrode and the capacitance value change amount of the second electrode, or according to the capacitance value change amount of the first electrode and the first electrode It is judged by the amount of change in the capacitance value of the four electrodes.

Images