WO2019223089A1

WO2019223089A1 - Capacitance-type touch device and positioning method therefor

Info

Publication number: WO2019223089A1
Application number: PCT/CN2018/096379
Authority: WO
Inventors: 许向东; 张贤连; 刘林; 杨运生
Original assignee: 深圳市艾博德科技股份有限公司; 深圳市东研新科技有限公司
Priority date: 2018-05-24
Filing date: 2018-07-20
Publication date: 2019-11-28
Also published as: CN109032437B; CN109032437A

Abstract

The present invention relates to a capacitance-type touch device and a positioning method; the device comprises two groups of parallel wires arranged on a substrate along the X and Y directions, and the group arranged in the X direction comprises M wires R, each wire R extending from left to right in the X direction and then wrapping back around from right to left in the opposite direction along X, thereby going back and forth until the M wires R completely fill up the X direction according to an interval of a first preset distance, wherein in any group along the X direction, continuous m wires R are different; along the Y direction is the same, and during positioning, every m x n intersection point is an effective touch position. In the present invention, the wires are repeatedly disengaged and returned, thereby reducing thread ends and lowering costs.

Description

Capacitive touch device and positioning method thereof

Technical field

The invention relates to the field of capacitive touch devices, in particular to a wiring structure and a positioning method of the capacitive touch devices.

Background technique

The touch device mainly includes a touch screen and a touch whiteboard. Its main function is to locate the touched points or trajectories. It is a computer input device. A transparent touch device generally installed in front of the display is called a touch screen, which is installed in the electronic whiteboard. Just touch the whiteboard. At present, methods for positioning a touch device according to a touch point or a touch track mainly include an infrared touch device, a resistive touch screen, and a capacitive touch screen. At present, infrared touch positioning is mainly used on electronic whiteboards, and resistance positioning and capacitance positioning methods are mainly used on touch screens. With the development of science and technology, resistance positioning and capacitance positioning methods are also used on electronic whiteboards.

Currently, capacitive electronic whiteboards and touch screens are the main body of touch devices. The positioning method of the capacitive electronic whiteboard and the touch screen is shown in Fig. 1. Some wires are arranged on the substrate in a crisscross pattern. Generally, the wires are vertical (T) and horizontal (R). The intersection of T and R is not in contact with each other. (Insulation), therefore, with a certain capacitance, a pulse signal is transmitted from T. Due to the capacitance induction on R, a corresponding pulse signal will be received. If at this time, a human hand or other stylus, etc. touches a certain At the crossing point, because there is capacitance between the human hand or other touch pen and T or R, a part of the energy will also be sensed. In this way, R will receive a pulse signal with a lower amplitude than normal. As shown in Figure 1, when a hand or a stylus touches the intersection of T _j and R _i , a pulse signal with a lower amplitude than the normal amplitude will be received on the R _i line, so that it can be located at the intersection of T _j R _i as a touch. Point, this is an absolute positioning method. At this time, T and R can be copper wires or other solid metal wires, or can be transparent silver wires or transparent conductive films (currently most of the touch screens use transparent wires), etc., as disclosed in Chinese Patent Grant Bulletin CN 101639749 B The wiring structure and manufacturing method of such a capacitive touch screen are adopted. It uses a transparent conductive film, a transparent conductive film and an insulating film of two sets of wires arranged along the X and Y directions on the substrate, and the X and Y directions are T, R two kinds of wires. Such a touch screen or a touch whiteboard can bear the cost if it is small in size, and a large size touch screen or a touch whiteboard can have a very high cost, or even no one produces it because the cost is too high.

For example, the distance between the wires of a general mobile phone touch screen is 6mm. For a mobile phone screen of 60 × 120 square millimeters, there are 10 wires in the X direction (T line) and 20 wires in the Y direction (R line). There are only 10 receivers and only 20 receivers. In addition, as long as 30 wires are welded, these costs account for dozens of yuan in a 1,000 yuan mobile phone. But for large-screen products, such as a large screen of 6m × 12m, there will be 1000 wires in the X direction (T line) and 2000 wires in the Y direction (R line). This is a very large number. The cost of receiving and transmitting and welding (mainly the cost of welding) will be very expensive. For a screen of such a number of tens of thousands, it is impossible to spend tens of thousands to add a touch screen.

Summary of the Invention

The present invention provides a capacitive touch device and a positioning method for current touch devices such as a capacitive touch screen or a touch electronic whiteboard due to high wiring costs.

The technical solution of the present invention is: a capacitive touch device, comprising two sets of parallel wires arranged along the X and Y directions on a substrate, and a set distance is set between two adjacent wires in each group of wires.

M conductors R are arranged along the X direction, and each conductor R is wound from the left to the right in the X direction and then wound back in the opposite direction from the right to the left in the X direction, and so on until the M conductors R are set according to the first setting. The X-direction is spaced at a fixed distance, and any set of m continuous wires in the X-direction is different.

N conductors T are arranged along the Y direction, and each conductor T is wound from the bottom to the top in the Y direction, and then is wound back from the top to the bottom in the opposite direction of the Y, so as to reciprocate until the N conductors T according to the second design The Y-direction is spaced at a fixed distance, and any set of n consecutive wires T in the Y-direction is different.

The M and N are positive integers, and m and n are positive integers smaller than M and N.

The invention repeatedly disassembles the wire, resulting in a reduction in the number of wire ends and a reduction in cost.

Further, in the above capacitive touch device, the first set distance and the second set distance are between 3 mm and 15 mm, respectively.

Further, in the above-mentioned capacitive touch device: m and n are both any number between 3-8.

Further, in the above capacitive touch device, the M and N are between 10 and 300, respectively.

The invention also provides a positioning method for a capacitive touch device, which includes the following steps:

Step S1. On the touch surface of the capacitive touch device, touch a square area with an area of at least n × m;

Step S2, it is determined that m wires T and n wires R are touched;

In step S3, the coordinates (x, y) of the touch point on the touch device are determined by the m wires T and the n wires R.

Further, in the above-mentioned positioning method of the capacitive touch device: in the step 3, the coordinates (x, y) of the touch point on the touch device are determined by checking a table, and the table is By touching all the points on the touch surface of the capacitive touch device in advance, and writing down the m wires T and n wires R corresponding to each point, the points on the touch surface and the m wires T and n wires R are formed one by one. Corresponding table.

Further, in the above-mentioned positioning method of the capacitive touch device: m and n are both any number between 3-8.

Further, in the above-mentioned positioning method of the capacitive touch device, the M and N are between 10 and 300, respectively.

The present invention is described in detail below with reference to the drawings and specific embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a touch screen positioning in the prior art.

FIG. 2 is a distribution diagram of the wires T and R in the touch screen according to the first embodiment of the present invention.

Detailed ways

This embodiment is a face line structure of a touch screen. As shown in FIG. 2, this embodiment uses 12 wires T and 10 wires R. According to the effective touch point, it is a 3 × 3 area, that is, m and n. Both are 3, then there can be wires in the X direction

Root, there can be wires along the Y direction

This shows that each wire R or wire T can be wound back and forth multiple times. As long as you pay attention to the three consecutive sets of wires that are different, as shown in Figure 2, the wire R can be in the following order Winding: R1R2R3R4R5R6R1R2R4R5R3R6, so long as the source of any set of 3 wires is different. For example, the three wires of R1R2R3 are continuous three wires. When winding later, continuous R1R3R2, R2R1R3, R2R1R3, R3R2R1R2, R3R1R1R2 It's ok, and it's quite convenient for winding, just follow the steps below:

Step 1. Number 12 wires T so that each wire T has a unique number;

Step 2. Select any three of the 12 wires T to be wired in the X direction, and the distance between each is 3 mm, and record the numbers of the three wires T in the order along the Y direction.

Step 3. Select any one of the wires T from the 12 wires T. In practice, in this step, you can choose from 10 wires T, and remove the last two wires along the X direction from the 12 wires. The line i is the i-th, then the wires T corresponding to the first two i-1 and i-2 are not included, and any one of the remaining ten wires T is skipped, so step 4 is skipped. In addition, in this step, if it is transferred from step 5, when selecting the next wire T, you can choose the next one in a certain order to avoid repetition. If it is transferred from step 7, it may not follow this In order, in practice, you can choose the same wire T every time you turn over step 7, or you can choose the serial number of the previous and next one according to the cycle. Of course, whether it is from step 5 or step 7 turn around, you can select the next wire T in turn in the set order.

Step 4. Determine whether the wire T is one of the last two wires currently wired in the X direction. If yes, go to step 3, otherwise go to step 5.

Step 5. Combine the wire T and the last two wires currently routed in the X direction into a group of three, that is, the end corresponding to i, i-1, i-2, and any three consecutive wires currently routed in the X direction. In comparison, if the three wires T are already in any of the preceding three consecutive wires, and the ends of any three wires T are not in order, then go to step 3, otherwise go to step 6.

Step 6. Dispose the selected wire T at 3 mm of the last wire in the X direction, and record the number of the selected wire T.

Step 7. Determine whether the wire is full along the X direction. If it is full, the process ends, otherwise go to step 3.

For the Y direction, the wiring is also performed as above.

If according to the current wiring method, a generally used pitch of 6mm is used, then the above 12 wires T and 10 wires R can only be used as a touch screen of 60 × 72 square millimeters, and the effective touch points on the top are 12 × 10 = 120. This is a relatively small mobile phone touch screen. If the wiring is performed according to the embodiment, each wire can be back and forth multiple times. With the effective touch area unchanged, the distance between adjacent parallel wires is 3 mm, and the total number of the above wires is 12 wires T and 10. The touch screen of the wire R can be a touch screen of 66 × 36 square centimeters. This is a fairly large touch display. The effective display points on it are 220 × 120-220-220-118-118 = 15724. Obviously this embodiment The resolution is almost 4 times that in the prior art.

The positioning method of the capacitive touch device in this embodiment is also relatively simple.

It includes the following steps:

Step S1. On the touch surface of the capacitive touch device, touch a square area with an area of at least 3 × 3; as shown in the figure, there are 9 intersections.

Step S2. It is determined that the three wires T that are touched are T2T3T4 and three wires R2R4R5;

In step S3, the coordinates (x, y) of the touch point on the touch device are determined by the three wires T and three wires R, that is, the coordinates (x, y) on the touch device corresponding to T2T3T4R2R4R5 are found in the table.

In practice, a table is made in advance to determine the coordinates (x, y) of the touch point on the touch device by looking up the table. The table is made by touching all points on the touch surface of the capacitive touch device in advance, and Note the m wires T and n wires R corresponding to each point to form a table where the points on the touch surface correspond to the m wires T and n wires R one to one.

Claims

A capacitive touch device includes two sets of parallel wires arranged along the X and Y directions on a substrate, and a set distance between two adjacent wires in each set of wires is characterized by:

M conductors R are arranged along the X direction, and each conductor R is wound from the left to the right in the X direction and then wound back in the opposite direction from the right to the left in the X direction, and so on until the M conductors R are set according to the first setting. The X direction is spaced at a fixed distance, and any set of m continuous R wires along the X direction are different;

N conductors T are arranged along the Y direction, and each conductor T is wound from the bottom to the top in the Y direction and then wound back from the top to the bottom in the opposite direction of the Y. The Y-direction is spaced at a fixed distance, and any set of consecutive n wires T in the Y-direction is different;

The M and N are positive integers, and m and n are positive integers smaller than M and N.
The capacitive touch device according to claim 1, wherein the first set distance and the second set distance are between 3 mm and 15 mm, respectively.
The capacitive touch device according to claim 1, wherein each of m and n is three.
The capacitive touch device according to claim 3, wherein M and N are between 10 and 100, respectively.
The positioning method of the capacitive touch device according to claim 1, comprising the following steps:

Step S1. On the touch surface of the capacitive touch device, touch a square area with an area of at least n × m;

Step S2, it is determined that m wires T and n wires R are touched;

In step S3, the coordinates (x, y) of the touch point on the touch device are determined by the m wires T and the n wires R.
The method for positioning a capacitive touch device according to claim 5, wherein in step 3, the coordinates (x, y) of the touch point on the touch device are determined by means of a look-up table, The table is obtained by touching all the points on the touch surface of the capacitive touch device in advance, and writing down m wires T and n wires R corresponding to each point to form points on the touch surface and m wires T and n. A one-to-one correspondence table for the wires R.
The method for positioning a capacitive touch device according to claim 5 or 6, wherein each of m and n is any number between 2-8.
The positioning method of the capacitive touch device according to claim 7, wherein the M and N are between 10 and 300, respectively.