TWI524227B - Touch screen device and a touch screen - Google Patents

Description

Touch screen device and touch screen thereof

The present invention relates to the field of electronic device technologies, and in particular, to a touch screen device and a touch screen thereof.

With the continuous development of touch screens, capacitive touch screens are more and more widely used in terminal devices. In the existing capacitive touch screen devices, a single layer can be set on the touch screen. Indium Tin Oxides (ITO) mutual capacitance to achieve touch of the touch screen device.

Referring to FIG. 1 , a pattern of mutual capacitance on a single layer in a touch screen of a touch screen device is illustrated, wherein each row of sensing channels includes one driving electrode and n receiving electrodes, and one driving electrode and one receiving electrode A mutual capacitance or sensing node is formed, and if there are m driving electrodes, m*n sensing arrays can be formed. The receiving electrodes of each of the columns need to be shorted together by a jumper, for example, the receiving electrode 1 coupled to the driving electrode needs to be connected to the receiving electrode 1 coupled to the driving electrode 2.

In the prior art, each of the driving electrode and the receiving electrode on the touch screen requires a separate lead wire, and each lead wire needs an interface, that is, a bonding pad (Bonding Pad) and a touch screen external circuit, so that Will require a lot of interfaces, so that more leads not only make The structure of the touch screen in the touch screen device is cumbersome and is not conducive to the performance improvement of the touch screen device.

The embodiment of the invention provides a touch screen device and a touch screen thereof, which simplifies the structure of the touch screen in the touch screen device, and is beneficial to the performance improvement of the touch screen device.

The embodiment of the invention provides a touch screen of a touch screen device, comprising: sensing nodes arranged in an array, each sensing node comprising an X pole electrode and a Y pole electrode, wherein the X pole electrode is an induction An electrode and the Y-electrode is a receiving electrode, or the X-electrode is a receiving electrode and the Y-electrode is a sensing electrode; each of the sensing channels in the sensing array includes m X-electrode electrodes and m-group Y-poles An electrode, wherein the m is a natural number greater than 1, and one X-electrode electrode corresponds to a set of Y-electrode electrodes; the same Y-electrode electrodes of the m-group Y-electrode electrodes are connected, and the Y-electrode electrodes connected together correspond to A leader line.

The embodiment of the invention further provides a touch screen device, comprising: a touch screen; the touch screen comprises: sensing nodes arranged in a sensing array, each sensing node comprising an X pole electrode and a Y a pole electrode, the X pole electrode is a sensing electrode and the Y pole electrode is a receiving electrode, or the X pole electrode is a receiving electrode and the Y pole electrode is a sensing electrode; each row of sensing channels in the sensing array includes m X a pole electrode and an m group Y pole electrode, wherein the m is a natural number greater than 1, and one X pole electrode corresponds to a group of Y pole electrodes; the same Y pole electrode of the m group Y pole electrodes are connected and connected The Y pole electrodes together correspond to one lead wire.

It can be seen that, in the touch screen of the embodiment of the present invention, the same Y-electrode is connected to the m-poles of the m-th electrodes of each row of the sensing channels in the sensing array, and the Y-electrodes connected together correspond to one lead-out line, that is, A plurality of electrodes in a row of sensing channels share a single lead wire. Compared with the prior art, each lead wire leads to one lead wire, which can save more than half of the lead wires, and the more the sensor nodes, the more lead wires are saved. This simplifies the structure of the touch screen in the touch screen device, which is beneficial to the performance improvement of the touch screen device.

10‧‧‧X pole electrode

11‧‧‧Y pole electrode

1 is a setting pattern of mutual capacitance on a touch screen in the prior art; FIG. 2a is a setting pattern of mutual capacitance on a touch screen in a touch screen device according to an embodiment of the present invention; In the embodiment of the present invention, a setting pattern of the Y-level electrode on the touch screen is used; FIG. 2c is another setting pattern of the Y-level electrode on the touch screen in the embodiment of the present invention; and FIG. 2d is an embodiment of the present invention. FIG. 3 is a schematic diagram showing another arrangement of a Y-level electrode on a touch screen; FIG. 3 is a view showing that the touch screen includes 10*16 sensors in the embodiment of the present invention. A setting pattern of each electrode when the sensing array of the node is used; FIG. 4a is another setting pattern of each electrode when the sensing array includes 10*16 sensing nodes on the touch screen in the embodiment of the present invention; FIG. 4b is In the embodiment of the present invention, the touch screen includes another arrangement pattern of each electrode when the sensing array of 10*16 sensing nodes is included; and FIG. 5a illustrates that the touch screen includes 10*16 sensing nodes in the embodiment of the present invention. Another arrangement pattern of each electrode in the sensing array; FIG. 5b is another arrangement pattern of each electrode when the sensing array includes 10*16 sensing nodes on the touch screen in the embodiment of the invention; FIGS. 6a-6b It is a partial view of the arrangement pattern when the touch screen includes a square electrode in the embodiment of the present invention; and FIGS. 7a to 7b are partial views of the arrangement pattern when the touch screen includes the sawtooth electrode in the embodiment of the present invention.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the invention.

The embodiment of the invention provides a touch screen device, which can be a mobile phone or a global positioning system (Global Positioning System (GPS) device, or a capacitive touch screen device such as a palm-sized computer, whose structure includes a cover, a touch screen, and a display, and is stacked from the outside to the inside (the touch that the user can see) The control screen device is partially external. It can be understood that the touch screen device can also include other structures such as a touch circuit for controlling the operation and display of the touch screen device. The cover is visible to the user outside the touch screen device, and is mainly used for providing user touch and protecting devices in the touch screen device such as a touch screen and a display; the touch screen It is mainly used to carry mutual capacitance and metal wiring. When the user touches the exposed cover, the mutual capacitance on the touch screen stacked under the cover will change due to the squeeze. The touch circuit included in the control screen device determines the touch operation of the touch screen device by the user according to the change of the mutual capacitance; the display is mainly used for display.

The single-layer mutual capacitance pattern disposed on the touch screen is shown in FIG. 2A, and specifically includes: sensing nodes arranged in a sensing array, each sensing node includes an X-electrode 10 and a Y-electrode 11 The X-electrode 10 is a sensing electrode and the Y-electrode 11 is a receiving electrode, or the X-electrode 10 is a receiving electrode and the Y-electrode 11 is a sensing electrode.

Each row of sensing channels in the sensing array includes m X pole electrodes 10 and m group Y pole electrodes 11, wherein m is a natural number greater than 1 (m is 2 in FIG. 2a as an example), and one X pole electrode 10 Correspondingly, a group of Y electrodes 11 constitutes a sensing unit group, and a plurality of (4 in FIG. 2a) Y-electrode electrodes 11 are included in each group of Y-electrodes, and each group can be Including the same number of Y-electrode electrodes 11, may also include different numbers of Y-electrode electrodes 11; if each group includes the same number of Y-electrode electrodes 11, in the m-group of Y-electrodes, the same Y-electrode 11 is connected, such as The Y pole electrode 1 coupled to the X pole electrode 1 is connected to the Y pole electrode 1 coupled to the Y pole electrode 2, and the Y pole electrodes 11 connected together only lead to a lead line correspondingly; and the same Y pole electrode 11 Two different and adjacent X-pole electrodes 10 can be coupled.

It can be understood that the setting of the Y-electrode 11 in each group may be, but not limited to, the following two modes:

(1) Referring to FIG. 2b, when the order of the Y-pole electrodes 11 between adjacent groups in each row of sensing channels is reversed, for example, in the first group of Y-electrode electrodes 11, the order of the Y-electrode electrodes 11 is from Y. The pole electrodes are arranged in an array of powers of 1 to 4, and in the second group of Y pole electrodes 11 adjacent to the first group of Y pole electrodes 11, the order of arrangement of the Y pole electrodes 11 is arranged from the Y pole electrodes 4 to 1. Thus, the Y-pole electrodes 11 between adjacent groups can be wired in series.

(2) Referring to Fig. 2c, when the order of the Y-pole electrodes 11 between adjacent groups in each row of sensing channels is the same, for example, in the first group of Y-electrode electrodes 11, the order of the Y-electrode electrodes 11 is from Y. The pole electrodes are arranged in a power range of 1 to 2, and in the second group of Y pole electrodes 11 adjacent to the first group of Y pole electrodes 11, the order of arrangement of the Y pole electrodes 11 is arranged from the Y pole electrode 1 to 2, Then, each of the Y electrodes 12 included in each row of sensing channels can only include two Y electrodes, so that the Y electrodes 11 between adjacent groups can be connected in series.

In this case, refer to Figure 2d, if each The group Y pole electrode 11 includes more than two (for example, three) Y pole electrodes 11, and when the Y pole electrodes 11 between adjacent groups are connected in series, only two of the Y pole electrodes 11 in each group may have If the lead wires do not collide, the lead wires drawn from the other Y electrode electrodes 11 may cross the other lead wires. For example, the lead wires 3 of the Y electrode 3 may cross the lead wires 1 of the Y electrode 1 and cannot be routed out. . Therefore, when the order of the Y-electrode electrodes 11 between adjacent groups in each row of sensing channels is the same, only two Y electrodes are required for each group.

In this embodiment, the lead lines of the X-pole electrodes 10 in each row of sensing channels are relatively simple, and each of the X-electrode electrodes 10 leads to a lead-out line. The number of the lead lines of the Y pole electrode 11 is determined by the number of the Y pole electrodes 11 in each group. In general, the number of the lead lines of the Y pole electrode 11 in one row of the sensing channels is the number of the Y pole electrodes 11 in one group. For example, if each group of Y electrodes includes four Y electrodes 11, the lead line of the Y electrode 11 of the row sensing channel is 4. Further, if the touch screen includes a plurality of rows of sensing channels, the number of the lead wires of the Y electrode 11 is also related to the arrangement of the X electrode 10 and the Y electrode 11 included in each row of the sensing channels.

Compared with the prior art, each row of sensing channels in the sensing array includes one sensing electrode and N sensing electrodes, and N+1 lead wires are used. When the pattern of mutual capacitance is used in the embodiment of the present invention, the lead wires are greatly reduced. . For example, in a sensing array of the prior art, a row of sensing channels uses 1 driving electrode and 16 receiving electrodes to form 1*16 sensing nodes, and 17 lead wires are needed. If there are 10 rows of sensing channels in the sensing array, it is required. 170 lead wires; when using the solution of the embodiment of the present invention, In the sensing array, one driving electrode and four receiving electrodes can be used in one row, and each group includes four receiving electrodes, so that 8 lead wires are needed. If there are 10 rows of sensing channels in the sensing array, 80 leads are needed. line. It can be seen that, according to the technical solution of the embodiment of the present invention, the same Y-electrode is connected to the m-th Y-electrode of each row of the sensing channel in the sensing array, and the Y-electrodes connected together correspond to one lead-out line, that is, one row of induction A plurality of electrodes in the channel share a single lead wire. Compared with the prior art, each lead wire leads to one lead wire, which can save more than half of the lead wires, and the more the sensor nodes, the more lead wires are saved. It can simplify the structure of the touch screen in the touch screen device, which is beneficial to the performance improvement of the touch screen device.

It should be noted that, when the X-electrode 10 and the Y-electrode 11 are disposed in each of the above-mentioned sensing channels, m can be the same as the number of Y-electrodes in each group (denoted as n), so that the minimum lead-out line can be used. To the largest coupled sensing node. Certainly, the embodiment of the present invention is not limited to the case of m=n, and may further include a case where m is greater than n or m is less than n. In a certain case, the lead line may have different combinations, for example, when the sum of the lead lines is 8 The following combinations are possible: (1) two X-electrode electrodes combined with two sets of Y-electrode electrodes, each of which includes six Y-electrode electrodes, so that 12 sensing nodes can be formed; (2) three X-electrode electrodes and three Group Y electrode combination, each group includes 5 Y electrode combinations, which can form 15 sensing nodes; (3) 4 X electrodes and 4 Y electrodes combined, each group includes 4 Y electrode combinations , can form 16 sensing nodes.

In addition, it should be noted that in the touch screen device, the display is located under the touch screen, and the light on the display passes through the touch screen to reach the cover, so that the user can see the touch screen device. The content displayed; however, since there is a lead line between the X pole electrode and the Y pole electrode in each row of the sensing channel on the touch screen, there may be a gap between the X pole electrode and the Y pole electrode, and the light passes through the gap The light after reaching the cover plate through the electrode (generally ITO material) is not uniform. In order to make the light presented to the user uniform, it is further possible to provide an optically compensated floating block at the gap between the X-electrode and the Y-electrode.

The mutual capacitance pattern on the touch screen in the touch screen device of the embodiment of the present invention is described in the following embodiments. In this embodiment, the touch screen includes 10 rows of sensing channels, and each row of sensing channels includes 4 One X-electrode electrode and four Y-pole electrodes, and each of the Y-electrode electrodes includes four Y-electrode electrodes, that is, m is 4, wherein the arrangement order of the Y-electrode electrodes 11 between adjacent groups is opposite, forming 10* A sensing array of 16 sensing nodes. Specifically, the upper electrode of the touch screen may include, but is not limited to, the following methods:

(1) Referring to Figure 3, 10 rows of sensing channels on the touch screen, each row of sensing channels includes four X-electrode electrodes as sensing electrodes, namely Ta1 to Ta4, and each group of Y-electrodes is a receiving electrode. That is, Rx1 to Rx4. The arrangement order of the Y-electrodes between adjacent groups is reversed. The number of lead lines drawn is 80.

(2) Referring to Figures 4a and 4b, the X-electrode 10 and the Y pole are electrically connected between adjacent sensing channels in the sensing array on the touch screen. The poles 11 are arranged in opposite directions, that is, the X pole electrode is disposed in the left direction and the Y pole electrode is disposed in the right direction in one sensing channel, and the X pole electrode is disposed in the right direction and the Y pole electrode is disposed in the sensing channel adjacent to the sensing channel. In the left direction. In FIG. 4a, the X-electrode is a sensing electrode, and the Y-electrode is a receiving electrode; and in FIG. 4b, the X-electrode is a receiving electrode and the Y-electrode is a sensing electrode.

In this embodiment, in order to further save the number of lead wires, when the Y-pole electrodes between adjacent sensing channels in the sensing array are adjacent, the m-group Y-poles included in the adjacent each sensing channel in the sensing array Among the electrodes, all of the same Y-electrodes arranged at the inner edge of each group are connected, and one lead-out line is drawn correspondingly. For example, in Figure 4b, the Y-electrode in the second row of sensing channels (ie, four sets of Tx1 to Tx4) is adjacent to the Y-electrode in the third row of sensing channels, and the four rows included in the two rows of sensing channels are In the Y-electrode, all of the same Y-electrodes, Tx1, arranged at the inner edge of each group are connected, and only one lead-out line is taken out, so that the number of lead-out lines is further reduced by one. In this embodiment, the number of adjacent Y-electrodes between adjacent sensing channels is four (the second and third sensing channels respectively, the fourth and fifth sensing channels, the sixth and seventh sensing channels, the eighth And the sensing channel of the present embodiment, the number of the lead wires drawn by the touch screen of the embodiment is 80-4=76.

(3) The arrangement pattern of the electrodes in the sensing array on the touch screen shown in FIGS. 5a and 5b is similar to the electrode arrangement pattern shown in the above 4a and 4b, specifically in the first row of sensing channels. The Y pole electrode (ie, 4 sets of Tx1 to Tx4) is adjacent to the Y pole electrode in the second row of sensing channels, and among the 4 sets of Y pole electrodes included in the two rows of sensing channels, All of the Y electrodes, which are arranged at the inner edge of each group, are connected, and only one lead wire is connected; the difference is that, in this embodiment, between the adjacent sensing channels, a part of the same Y The pole electrodes are connected such that the Y pole electrodes can be connected in parallel such that the impedance of the electrodes is reduced. For example, in FIG. 5b, a portion of the Y-electrodes in the fourth group of Y-electrodes of the first row of sensing channels, that is, Tx1 to Tx3, and a portion of the Y-electrodes in the fourth group of Y-electrodes of the second row of sensing channels, After Tx1 to Tx3 are connected, they do not cross the other lead wires, and the impedance is reduced by connecting the Y electrodes.

It can be understood that the X-electrode 10 and the Y-electrode 11 described in the above embodiments may be electrodes of any shape, such as electrodes of square or triangular or circular or circular arc shape, and the like. For example, as shown in Figures 6a and 6b, the X-electrode and the Y-electrode are square electrodes, and the X-electrode and Y-electrode are arranged in different directions in the two figures, wherein each of the sensing channels includes 4 The Y-electrode is arranged in the reverse order of the Y-electrode between adjacent groups, and an optical floating block can be disposed at a gap between the X-electrode and the Y-electrode. In order to save further reduction of series leads between adjacent groups, adjacent Y-electrodes between adjacent groups may be arranged as one electrode, such as Y-electrode 4 coupled to X-electrode 1 in Figures 6a and 6b. The Y-pole electrode 4 coupled to the X-pole electrode 2 is disposed adjacent to one electrode, so that the series connection between the two electrodes can be saved compared to the technical solution in which two electrodes are provided.

For another example, as shown in Figures 7a and 7b, the X-electrode and the Y-electrode are both serrated electrodes, and the X-electrode and the Y-electrode are bitten each other. In the two figures, the arrangement directions of the X-electrode and the Y-electrode are different, wherein each of the sensing channels includes four Y-electrodes, and the arrangement of the Y-electrodes between adjacent groups is reversed, and An optical suspension block is disposed at a gap between the X pole electrode and the Y pole electrode. In order to save further reduction of series leads between adjacent groups, adjacent Y-electrodes between adjacent sets of Y-electrodes are arranged as one electrode.

The embodiment of the present invention further provides a touch screen of a touch screen device. The structure of the touch screen is similar to that of the touch screen in the touch screen device, and details are not described herein.

The touch screen device and the touch screen thereof provided by the embodiments of the present invention are described in detail. The principles and embodiments of the present invention are described in the following. The description of the above embodiments is only used for To help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and application scopes. It should not be construed as limiting the invention.

10‧‧‧X pole electrode

11‧‧‧Y pole electrode

Claims (8)

A touch screen of a touch screen device includes: sensing nodes arranged in a sensing array, each sensing node includes an X pole electrode and a Y pole electrode, the X pole electrode is a sensing electrode and the Y The pole electrode is a receiving electrode, or the X pole electrode is a receiving electrode and the Y pole electrode is a sensing electrode; each row of sensing channels in the sensing array comprises m X pole electrodes and m group Y pole electrodes, each group Included in the same number of Y-electrodes, the number of Y-electrodes in each group is at least two, wherein m is a natural number greater than 1, and one X-electrode corresponds to a set of Y-electrodes; The same Y-pole electrodes are connected in the pole electrode, and the Y-pole electrodes connected together correspond to one lead wire. The touch screen of claim 1, wherein when the order of the Y electrodes is the same between the adjacent groups, each of the m electrodes of the m groups of Y electrodes included in each of the rows of sensing channels Both include 2 Y-pole electrodes. According to the touch screen of claim 1, the arrangement order of the Y pole electrodes between the adjacent groups is reversed. The touch screen of any one of claims 1 to 3, wherein the X-electrode and the Y-electrode are arranged in opposite directions between adjacent sensing channels in the sensing array. The touch screen of claim 4, wherein the Y electrodes of the adjacent sensing channels are adjacent to each other, and the m electrodes of the group Y are included in each adjacent sensing channel. Medium, all the Y electrodes connected in the same inner edge of each group are connected, and one lead is taken out correspondingly line. The touch screen of claim 5, wherein the adjacent Y-electrodes are connected between the adjacent sensing channels. The touch screen according to any one of claims 1 to 3, wherein the X-electrode and Y-electrodes are square or triangular or circular or arc-shaped electrodes. The touch screen of any one of claims 1 to 3, wherein an optical compensation suspension block is disposed at a gap between the X-electrode electrode and the Y-electrode electrode.