TW201601020A - Touch control electrode structure and control device - Google Patents

Abstract

A touch control electrode structure includes: a plurality of sensing electrode pairs, each of which includes a first sensing electrode and a second sensing electrode adjacent to each other wherein each of the first sensing electrode and the second sensing electrode includes at least one arc-shaped and claw-shaped electrode. The touch control electrode of the present application solves the disadvantage of the conventional touch control sensing electrode which can not be properly used on a non-rectangular area such as circular, elliptical or sectorial area.

Description

Touch electrode structure and control device

The present invention relates to a touch electrode structure, and more particularly to a touch electrode structure applied to a portable device or a wearable device.

As smart phones and tablets become mainstream information products, touch panels that use touch gestures to input commands become user-friendly interface controls. At present, most of the portable electronic devices with touch functions are provided with a rectangular touch panel, but in the future, when the wearable device is gradually popularized, the application of a circular or elliptical non-rectangular touch area will be applied. More and more, such as watch-type wearable devices.

Traditionally, the touch electrode layout developed with the rectangular touch area as a starting point is mostly completed by a two-dimensional rectangular distribution. However, when such a configuration is transferred to a circular or elliptical touch area, the conventional design will not be able to effectively handle the shape change of the edge region, causing problems in the touch point sensing of the edge region. Therefore, how to develop a touch electrode layout and a touch panel device that can be set to a wearable device is an urgent problem to be solved.

In order to solve the problem that the conventional touch electrode structure cannot be applied to the arc-shaped touch area, the main purpose of the present invention is to provide a touch electrode structure, comprising: a first group of sensing electrodes, including a first sensing electrode and a second sensing An electrode, which is adjacent to the first gap and constitutes a first sector; and a first group of signal lines, including a first signal line and a second signal line, the two are electrically connected to the first sensing electrode and the second Induction electrode.

According to the above concept, the first gap in the touch electrode structure of the present invention extends from the first point of the edge of the sector to the second point and has a single arc.

According to the above concept, the first gap in the touch electrode structure of the present invention is composed of a plurality of arcs.

According to the above concept, the touch electrode structure of the present invention further includes: a second set of sensing electrode pairs, comprising a third sensing electrode and a fourth sensing electrode, the two adjacent to each other and forming a second sector, the second sector Adjacent to the first sector; and the second group of signal lines, comprising a third signal line and a fourth signal line, respectively electrically connected to the third sensing electrode and the fourth sensing electrode.

According to the above concept, the touch electrode structure of the present invention further comprises a round electrode disposed at a center of a circular area.

Another object of the present invention is to provide a touch electrode structure, comprising: a complex array of sensing electrode pairs, wherein each group of sensing electrodes comprises a first sensing electrode and a second sensing electrode, which are adjacent to each other by a first gap And forming a sector, the fans are combined into a circle; and a plurality of signal lines, wherein each of the signal lines includes a first signal line and a second signal line, and the two are respectively electrically connected to the corresponding group induction The first sensing electrode and the second sensing electrode in the electrode.

According to the above concept, in the touch electrode structure of the present invention, the pair of sensing electrodes includes a first sensing electrode pair and a second sensing electrode pair, respectively, which are respectively located on a first sector and a second sector, and the first sector The arc angle is greater than the arc angle of the second sector, and the distance of the first sector from the center of the circle is less than the distance of the second sector from the center of the circle.

A further object of the present invention is to provide a control device, comprising: a controller electrically connected to a touch electrode structure for emitting a driving signal to the touch electrode structure and measuring a plurality of signals from the touch electrode structure The value of the sensing capacitor; and a position calculation module electrically connected to the controller, and calculating a coordinate position of a touch point according to the value of the sensing capacitance. The touch electrode structure includes a plurality of sets of sensing electrode pairs, each set of sensing electrode pairs includes a first sensing power And a second sensing electrode, wherein the first sensing electrode and the second sensing electrode are respectively formed by at least one arc-shaped electrode.

A further object of the present invention is to provide a touch electrode structure comprising: a complex array of sensing electrode pairs, each set of sensing electrode pairs comprising a first one of the first sensing electrodes and a second sensing electrode; wherein the first sensing electrode and the The second sensing electrodes each have at least one arcuate claw electrode.

According to the above concept, the pair of sensing electrodes in the touch electrode structure of the present invention includes a first sensing electrode pair and a second sensing electrode pair. The first sensing electrode pair is included in a first sector, and the second sensing electrode pair The second sector is included in the second sector, and the arc angle of the first sector is greater than the arc angle of the second sector.

According to the above concept, the pair of sensing electrodes in the touch electrode structure of the present invention are disposed on a circular substrate.

According to the above concept, the touch electrode structure of the present invention further comprises a circular electrode disposed at a center of the circular base.

According to the above concept, the circular electrode in the touch electrode structure of the present invention corresponds to a specific coordinate or a button.

According to the above concept, the touch electrode structure of the present invention further includes a complex array of signal lines, and each set of signal lines is electrically connected to the pair of sensing electrodes corresponding to one of the pair of sensing electrodes.

According to the above concept, each of the group of signal lines in the touch electrode structure of the present invention includes a first signal line and a second signal line, respectively connected to the corresponding first sensing electrode and second sensing electrode.

According to the above concept, in the touch electrode structure of the present invention, each of the first signal lines is connected to a base of the corresponding first sensing electrode, and the second signal line is connected to a tip end of the corresponding second sensing electrode.

10‧‧‧Base

11‧‧‧First set of sensing electrode pairs

111‧‧‧First sensing electrode

112‧‧‧Second sensing electrode

110‧‧‧First gap

119‧‧‧ first fan

1101~1107‧‧‧Arc

12‧‧‧Signal line group

121‧‧‧First signal line

122‧‧‧second signal line

3‧‧‧Face

31‧‧‧ first point

32‧‧‧ second point

33‧‧‧Arc

41, 42‧‧‧ trapezoidal electrodes

51‧‧‧The inner ring sector

52‧‧‧Outside area sector

59‧‧‧Single round electrode

60‧‧‧Touch sensing electrodes

61‧‧‧ signal line

62‧‧‧ Controller

63‧‧‧Location Computing Module

64‧‧‧Portable/Wearable Devices

FIG. 1 is a first embodiment of a touch electrode structure developed in the present invention. schematic diagram.

Figure 2 is a partial enlarged view of the first embodiment of the present invention.

FIG. 3 is a schematic view showing the formation of a touch electrode and a gap in a fan surface in this case.

FIG. 4 is a schematic diagram showing a rectangular shape in which a touch electrode and a gap are formed in a rectangle.

FIG. 5 is a schematic diagram of a second embodiment of the touch electrode structure developed in the present invention.

FIG. 6 is a functional block diagram of the present application applied to the touch device.

Some exemplary embodiments embodying the features and advantages of the present invention are described in detail in the following description. It is to be understood that the present invention is capable of various modifications in the various aspects of the present invention, and the description and drawings are intended to be illustrative and not limiting.

Please refer to FIG. 1 , which is a schematic diagram of a first embodiment of a touch electrode structure developed to improve the prior art. The method is mainly performed on the surface of the substrate 10 in the form of a single conductive layer. It is a display panel of a portable device or a wearable device. The present embodiment is described by using the substrate 10 as a circular shape, but is not limited thereto. As can be seen from FIG. 1, the touch electrode structure of the present invention can be composed of a plurality of pairs of sensing electrodes, which are filled with a circular area of the substrate 10. The composition of each pair of sensing electrodes is similar. The first group of sensing electrodes 11 is taken as an example. The first sensing electrode 111 and the first sensing electrode 111 are formed by four arc-shaped claws. The two sensing electrodes 112 are alternately adjacent to each other across the first gap 110 to form a first sector 119. Taking FIG. 1 as an example, the circular area is divided into four equal parts, and the configuration of each quarter is equal. The lines of different shapes in the electrode in FIG. 1 only clearly distinguish the distribution of different electrodes, and do not represent the There are any material differences between the electrodes. So Figure 2 is a magnification of this quarter circle for a clearer explanation.

The first sector 119 in FIG. 2 is separated from the first sensing electrode 111 and the second sensing electrode 112 by the first gap 110. The first gap 110 is mainly composed of a plurality of arcs (in this example, there are seven The strips, 1101~1107) are configured such that the area of the first sector 119 can be divided into two parts, and the first sensing electrodes 111 composed of four arc-shaped claw electrodes are respectively provided in the two portions and the first Two sensing electrodes 112. The four arc-shaped claw electrodes in the first sensing electrode 111 are all connected to the first signal line 121 in the signal line group 12, and the four arc-shaped claw electrodes in the second sensing electrode 112 are connected to the signal line group. The second signal line 122 in 12. In this embodiment, the first signal line 121 is connected to the base of each of the arc-shaped claw electrodes in the first sensing electrode 111, but is not limited thereto. In practice, the bases of all the arc-shaped claw electrodes in the first sensing electrode 111 can also be electrically connected together, and the first signal line 121 can be connected only to the arc-shaped claw electrodes in the first sensing electrode 111. The tip of one can also achieve the purpose of controlling the first sensing electrode 111 by the first signal line 121. The arc-shaped claw electrode in the second sensing electrode 112 and the second signal line 122 may be connected in the same manner or similar to the manner in which the first sensing electrode 111 is connected to the first signal line 121. In an embodiment, the signal line group 12 can be disposed only on one side of the pair of sensing electrodes. At this time, the first signal line 121 can be connected to the base of each of the arc-shaped claw electrodes in the first sensing electrode 111. The bases of all the arc-shaped claw electrodes in the second sensing electrode 112 are electrically connected together, and the second signal line 122 may be connected only to the tip of one of the arc-shaped claw electrodes in the second sensing electrode 112. . The touch electrode structure of the present invention is suitable for various applications by the elastic connection between the pair of sensing electrodes and the first set of signal lines.

In the embodiment shown in FIG. 2, when the user's finger or other touch object is placed in the first sector 119, the first sensing electrode 111 and the second sensing electrode 112 are sensed. The capacitance values are respectively changed, and the electrical connection between the first signal line 121 and the second signal line 122 in the signal line group 12 can be sensed by a controller (not shown in the figure) electrically connected to the signal line. Measure the corresponding capacitance value. For the comparison of the magnitudes of the two capacitance values, the relative angle value of the finger position on the curved sector can be estimated. For example, the total angle of the current sector is 90 degrees (π/2), through the first sensing electrode 111 and the second sensing. The ratio of the capacitance values measured on the electrodes 112 can be used to estimate an angle value less than 90 degrees (π/2), thereby obtaining an angle in a polar coordinate. The details here can be referred to the detailed description below.

The main purpose of the gap formed by the plurality of arcs 1101 to 1107 is to increase the resolution of the read angle. Therefore, when the resolution is acceptable or when the center angle of the sector is reduced, the arc can also be selected. The number is reduced, even reduced to only one on each sector, such as the example shown in Figure 3, which can be accomplished with only a single arc 33 extending from the first point 31 of the edge of the sector 3 to the second point 32. That is, the number of arc-shaped claw electrodes in each of the sensing electrode pairs may be different depending on the application, and each sensing electrode may have one or more arc-shaped claws. electrode. As seen from this figure, the figure is a shape formed by bending a rectangular shape in which two trapezoidal electrodes 41 and 42 are combined as shown in FIG. The use of the electrode configuration of FIG. 4 to calculate the position information is a well-known technique and will not be described again. The simplified derivation process is as follows: mainly by using the ratio of the geometric relationship of the two trapezoidal electrodes to the value of the induced capacitance, and then listing the following three simultaneous equations: (xa) / (ba) = (Yy) / Y, where ( x, y) represent the two-dimensional coordinates of the touch point, a and b respectively represent the upper and lower base of the trapezoid, and X and Y are the length and width of the rectangle; x/(a+b)=L/(U+L), Where L represents the sensed capacitive sensing amount with respect to the trapezoidal electrode 41, U represents the measured capacitive sensing amount with respect to the trapezoidal electrode 42; R = (b/a), where R represents the ratio of a to b; and when the rectangle After converting to a fan, Y will be replaced by (π r)/n, so (xa)/(ba)=((π r)/ny)/(π r)/n, where n is the circle is equally divided The number of parts, r is the average of the diameter of the outer ring of the sector and the diameter of the inner ring. From the above formula, y=((RU-L)/(R-1)(U+L))((π r)/n) can be simplified, and x can also be estimated by a similar method, so The x and y values in Figure 3 will derive the angle θ in the polar coordinates required for this case.

Referring to FIG. 5 again, it is a schematic diagram of a second embodiment of the touch electrode structure developed in the present invention. The difference between the first embodiment and the first embodiment is that the circle is equally divided by the number of parts, due to the inner ring sector 51. The area is small, so only the inner ring is divided into four equal parts (n=4), but when the outer ring area is larger, in order to maintain the resolution, the case is divided into eight outer rings. The sector fan 52, that is, n=8, so that the arc length of each electrode will not be too long. This leads to inaccurate positioning. Similarly, if a large area of the touch circular area needs to be realized, the fan of the outer ring can be equally divided into more blocks, so that the distance of the first sector from the center of the circle is smaller than the distance from the center of the second sector. The second fan may be equally divided into a plurality of portions such that the arc angle of the first sector is greater than the arc angle of the second sector. Such changes are quite diverse, but they do not deviate from the above principles, so they are not described here. As for the center of the circle, there will be a single circular electrode 59, which can be defined as a button or a specific coordinate, which can play the role of a confirmation button in the trackpad, or whether the particular coordinate is touched.

FIG. 6 is a functional block diagram of the touch device applied to the touch device. First, the plurality of touch sensing electrodes 60 completed by the method of the present invention can be constructed in any shape such as a circle, an ellipse or a fan, and the plural The controller 62 electrically connected to the plurality of signal lines 61 respectively extending from the touch sensing electrodes 60 sends a driving signal to the touch sensing electrodes 60 and measures each of the sensing electrodes 60 every short time. Sensing the capacitance value, and transmitting the sensing capacitance value to the position calculation module 63 at the back end, and performing an operation similar to the above equation to estimate the polar coordinate position data of the finger touch point, and then obtaining the obtained polar coordinate position data or The converted two-dimensional coordinates are passed to the portable/wearable device 64 for use.

In summary, the present invention can solve the problem that the conventional touch sensing electrode cannot be effectively transferred to a non-rectangular touch area such as a circle, an ellipse or a fan, so that it can be widely applied to a wearable device or a portable device. The device, but also maintains a fairly good positioning resolution. In addition, the present invention has been modified by those skilled in the art, and is not intended to be protected by the scope of the patent application.

111‧‧‧First sensing electrode

112‧‧‧Second sensing electrode

110‧‧‧First gap

119‧‧‧ first fan

1101~1107‧‧‧Arc

12‧‧‧Signal line group

121‧‧‧First signal line

122‧‧‧second signal line

Claims (19)

A touch electrode structure comprising: a first set of sensing electrode pairs, comprising a first sensing electrode and a second sensing electrode, wherein the first gap is adjacent to a first gap and constitutes a first sector; and a first group The signal line includes a first signal line and a second signal line, and the two are electrically connected to the first sensing electrode and the second sensing electrode, respectively. The touch electrode structure of claim 1, wherein the first gap extends from a first point of the first sector edge to the second point and has a single arc. The touch electrode structure of claim 1, wherein the first gap is composed of a plurality of arcs. The touch electrode structure of claim 1, further comprising: a second set of sensing electrode pairs, comprising a third sensing electrode and a fourth sensing electrode, the two are adjacent to each other by a second gap and Forming a second sector adjacent to the first sector; and a second set of signal lines including a third signal line and a fourth signal line, the two being electrically connected to the third sensing An electrode and the fourth sensing electrode. The touch electrode structure of claim 1, further comprising a round electrode disposed at a center of a circular area. A touch electrode structure includes: a complex array of sensing electrode pairs, wherein each group of sensing electrodes comprises a first sensing electrode and a second sensing electrode, and the two are adjacent to each other to form a fan, and the fans Forming a circle; and a plurality of signal lines, wherein each of the signal lines includes a first signal line and a second signal line, and the two are electrically connected to the first sensing electrode of the corresponding sensing electrode pair, respectively The second sensing electrode. The touch electrode structure of claim 6, wherein the gap extends from a first point of the edge of the sector to the second point and is in a single arc. The touch electrode structure of claim 6, wherein the gap is composed of a plurality of arcs. The touch electrode structure of claim 6, further comprising a round electrode disposed at a center of the circle. The touch electrode structure of claim 6, wherein the pair of sensing electrodes comprises a first pair of sensing electrodes and a pair of second sensing electrodes, respectively located on a first sector and a second sector. The arc angle of the first sector is greater than the arc angle of the second sector, and the distance of the first sector from the center of the circle is less than the distance from the center of the second sector. A control device includes: a controller electrically connected to a touch electrode structure for emitting a driving signal to the touch electrode structure and measuring a plurality of sensing capacitance values from the touch electrode structure; and a position The computing module is electrically connected to the controller, and calculates a coordinate position of a touch point according to the values of the sensing capacitors; wherein the touch electrode structure comprises a plurality of pairs of sensing electrodes, each group of sensing electrodes comprises a first sensing electrode and a second sensing electrode, wherein the first sensing electrode and the second sensing electrode are respectively formed by at least one arc electrode. A touch electrode structure includes: a complex array of sensing electrode pairs, each set of sensing electrode pairs includes a first one of the first sensing electrodes and a second sensing electrode; wherein the first sensing electrode and the second sensing electrode both have at least An arc type claw electrode. The touch electrode structure of claim 12, wherein the pair of sensing electrodes comprises a first sensing electrode pair and a second sensing electrode pair, the first sensing electrode pair being included in a first sector. The second sensing electrode pair is included in a second sector, and the arc angle of the first sector is greater than the arc angle of the second sector. The touch electrode structure of claim 12, wherein the set of sensing electrodes are disposed on a circular substrate. The touch electrode structure of claim 14, further comprising: a circular electrode disposed at a center of the circular base. The touch electrode structure of claim 15, wherein the circular electrode corresponds to a specific coordinate or a button. The touch electrode structure of claim 12, further comprising: a complex array of signal lines, each set of signal lines being electrically connected to the pair of sensing electrodes corresponding to one of the pair of sensing electrodes. The touch electrode structure of claim 17, wherein each of the set of signal lines comprises a first signal line and a second signal line, respectively connected to the corresponding first sensing electrodes and Second sensing electrode. The touch electrode structure of claim 18, wherein each of the first signal lines is connected to a base of its corresponding first sensing electrode, and the second signal line is connected to its corresponding second sensing a tip of the electrode.