TWM474202U - Touch input device and induction coil thereof - Google Patents

Abstract

An induction coil of a touch input device provided by the present invention includes a flat cable and a connecting device. The flat cable is disposed on a plane, and the flat cable has a first terminal and a second terminal as well as has a plurality of wires. The flat cable defines a sensing region on the plane through a plurality of bending portions. The connecting device is utilized to connect the wires which are located at the first terminal and the second terminal, so that the wires form a plurality of turns of circuit wound by a single conductive wire. The present invention also provides a touch input device.

Description

Touch input device and induction coil thereof

The present invention relates to an input device and an induction coil thereof, and more particularly to a touch input device and an induction coil thereof in combination with an electromagnetic stylus.

The capacitive touch panel uses a transparent metal electrode pattern on the surface of the substrate. When the finger approaches or touches the touch panel, the finger is a conductor and has static electricity, so the finger and the metal electrode pattern may form. A coupling capacitor, at this time, the electrostatic capacitance of the electrode of the touch panel at the touch point changes, thereby improving the voltage or current of the electrode. By comparing the voltage differences of adjacent electrodes, the position of the touch point can be calculated.

However, the use of finger input is convenient, but if you want to draw lines of different thickness on the touch screen, or for touch recognition between fine positions, it is obviously difficult to meet the above requirements through the fingers. Therefore, in order to increase the accuracy of the touch and the pressure sensing function, a scheme using an electromagnetic stylus has been proposed. However, the existing touch panel with the electromagnetic pen needs to be provided with an induction coil for sensing the pressure sensitive signal with the electromagnetic pen.

At present, there are three solutions for adding an induction coil to a touch panel. First, the wire is wound around the touch panel by hand. However, manual winding is not only labor intensive, but also does not The need for automated production. Second, the induction coil is wired on a circuit board and assembled with the original touch panel. However, this solution has the disadvantage of increasing the thickness of the entire touch module. Third, a pattern of a transparent metal induction coil is plated on the substrate of the capacitive touch panel. However, this solution requires a change in the design of the reticle, which will greatly increase the cost.

In view of this, the purpose of the present invention is to provide an inductive coil of a touch input device, which can solve the above problems by bending and connecting a wire and a special connection method, and has the advantages of low cost and simple process.

Another object of the present invention is to provide a touch input device that has an induction coil that can be bent through a wire and a special connection method to solve the above problems, and has the advantages of low cost and simple process.

In order to achieve the above object, the induction coil of the touch input device provided by the present invention comprises a line of wires and a connecting device. The cable is disposed on a plane, and the cable has a first end and a second end and has a plurality of wires that are bent a plurality of times to define a sensing area on the plane. The connecting device is configured to connect the wires at the first end and the second end such that the wires form a plurality of turns formed by a single conductor wire.

In a preferred embodiment, the wires are arranged in a single layer in the wire. In other preferred embodiments, the wires are arranged in a double layer or a plurality of layers in the wire.

In a preferred embodiment, the bend angles of the cable are between 45 degrees and 135 degrees, such as about 90 degrees.

In a preferred embodiment, each bend of the cable has an overlap. another In addition, the cable is a soft flat cable or a flexible printed circuit board.

In a preferred embodiment, the connecting device is a set of male and female connectors. In other preferred embodiments, the connecting device is a circuit board having a plurality of contacts, and the contacts are electrically connected to the wires.

Similarly, in order to achieve the above object, the touch input device provided by the present invention is for sensing the position and pressure of an electromagnetic pen on a touch screen. The touch input device includes a touch panel and an induction coil, wherein the touch panel is used to generate a position signal. The induction coil is disposed around the touch panel for reacting with the electromagnetic pen to generate a pressure sensitive signal. The induction coil comprises a row of wires and a connecting device. The cable is disposed on a plane, and the cable has a first end and a second end and has a plurality of wires that are bent a plurality of times to define a sensing area on the plane. The connecting device is configured to connect the wires at the first end and the second end such that the wires form a plurality of turns formed by a single conductor wire.

In a preferred embodiment, the plane is the surface of a liquid crystal panel.

In a preferred embodiment, the wires are arranged in a single layer in the wire. In other preferred embodiments, the wires are arranged in a double layer or a plurality of layers in the wire.

In a preferred embodiment, the bend angles of the cable are between 45 degrees and 135 degrees, such as about 90 degrees.

In a preferred embodiment, each bend of the cable has an overlap. In addition, the cable is a soft flat cable or a flexible printed circuit board.

In a preferred embodiment, the connecting device is a set of male and female connectors. In other preferred embodiments, the connecting device is a circuit board having a plurality of contacts, and the contacts are electrically connected to the wires.

Compared with the prior art, the present invention uses the cable to bend a plurality of times to surround the touch panel, so that the disadvantages of the above-mentioned prior art can be easily overcome. In addition, the jumper design of the connecting device allows the parallel-arranged wires to be connected into a plurality of turns of a single conductor wire to form the inventive induction coil.

In order to make the above and other objects, features, and advantages of the present invention more obvious and easy to understand, the detailed description is as follows:

10‧‧‧Touch input device

20‧‧‧Touch panel

30‧‧‧protective glass

40‧‧‧LCD panel

100‧‧‧Induction coil

120‧‧‧ cable

122‧‧‧ first end

124‧‧‧ second end

125‧‧‧Wire

1251, 1252, 1253, 1254‧‧‧ wires

128‧‧‧film

129‧‧‧ overlap

140‧‧‧Connecting device

142, 144‧‧‧ male and female connectors

145‧‧‧ boards

1451‧‧‧Contacts

In‧‧‧ input

Out‧‧‧ output

1 is a top plan view of an induction coil of a touch input device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic top view of the induction coil of the touch input device according to a preferred embodiment of the present invention.

3A to 3C are schematic cross-sectional views showing the cable of the preferred embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the touch input device of another preferred embodiment of the present invention.

The various embodiments of the present invention are described in detail with reference to the accompanying drawings

Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a top view of an induction coil of a touch input device according to a preferred embodiment of the present invention, and FIG. 2 is a touch diagram of a preferred embodiment of the present invention. A schematic view of the induction coil of the input device. It should be noted that, for the sake of clarity, the elements of the above figures are not drawn to scale. The induction coil 100 includes a row of wires 120 and a connection Device 140. In this embodiment, the cable 120 is a flexible flat cable (FFC), wherein the flexible flat cable is a cable formed by bonding a plurality of copper wires at a high temperature by using a film. However, in other embodiments, the cable 120 can be a Flexible Print Circuit (FPC) or other suitable flexible cable.

As shown in FIG. 1 , the cable 120 is disposed on a plane, and the cable 120 has a first end 122 and a second end 124 , that is, both ends of the cable 120 . Referring to FIG. 2, the cable 120 has a plurality of wires 125. In this embodiment, four wires 1251, 1252, 1253, and 1254 are used. However, this creation does not limit the number of wires 125.

Please refer to FIGS. 3A to 3C , and FIGS. 3A to 3C are schematic cross-sectional views showing the cable of the preferred embodiment of the present invention. In this embodiment, the cross-sectional view of the cable 120 is as shown in FIG. 3A, and four wires 1251, 1252, 1253, and 1254 insulated from each other are disposed in the insulating film 128. In addition, as shown in FIG. 3A, the wires 1251, 1252, 1253, and 1254 are arranged in a single layer in the wire 120. In other embodiments, in order to save the width of the cable 120, the wires 125 may be arranged in a double layer, as shown in FIGS. 3B and 3C, and may even be arranged in multiple layers. The two-layer arrangement of the wires 125 can be arranged up and down, as shown in FIG. 3B; or staggered, as shown in FIG. 3C.

Referring to FIG. 1 again, the cable 120 is bent over a plurality of times to define a sensing area on the plane, and the sensing area is specifically a sensing area of a touch panel (not shown). In this embodiment, the bending angles of the cable 120 are between 45 degrees and 135 degrees, such as 90 degrees in the first and second figures. In addition, each bend of the cable 120 has an overlapping portion 129 to keep the cable 120 lying flat on the plane to reduce the thickness. It is worth noting that the creation is not limited to the way of bending, for example, each bend can be bent in the same direction, or alternately bent, or Bend in any order.

Referring to FIG. 1 and FIG. 2 again, the connecting device 140 is configured to connect the wires 125 at the first end 122 and the second end 124 such that the wires 125 are formed by a single conductor wire. Multiple lines. In the example of FIG. 1, the connecting device 140 is a set of male and female connectors 142 and 144, wherein the male and female connectors 142 and 144 are designed to have jumper connections such that the wires 125 form a single wire. More than one line. The specific design of the male and female connectors 142 and 144 is known to those skilled in the art and will not be described herein.

In other embodiments, the cable 120 is shown in phantom for clarity of illustration, as shown in FIG. The connecting device 140 is a circuit board 145 having a plurality of contacts 1451. The contacts 1451 are electrically connected to the wires 125. It is worth noting that the lines on board 145 are for illustration only, and the actual wiring may be different. In the example of FIG. 2, the plurality of turns of the conductor wire are formed by one end of the wire 1251 as the input terminal In, and the four wires are formed by the connection of the wire 1252, the wire 1253, the wire 1254 and the contact 1451 in sequence. And one end of the wire 1254 is the output end Out.

It can be seen from the above that the preferred embodiment of the present invention uses the cable 120 to bend a plurality of times and cooperates with the connecting device 140 to form the side-by-side wires 125 into a single wire coil, so that the disadvantages of the above-mentioned prior art can be easily overcome.

The touch input device using the induction coil 100 of the above embodiment will be described in detail below. Please refer to FIG. 1 to FIG. 4 together. FIG. 4 is a cross-sectional view showing a touch input device according to another preferred embodiment of the present invention. The touch input device of this embodiment is for sensing the position and pressure of an electromagnetic pen (not shown) on a touch screen. Please refer to the above description for the components mentioned below, and will not be repeated here.

As shown in FIG. 4, the touch input device 10 includes a touch panel 20, a sense The coil 100, a cover glass or cover lens 30, and a liquid crystal panel 40 are used. Specifically, the touch panel 20 is a capacitive touch panel, and the touch panel 20 is configured to generate a position signal. That is, the electromagnetic pen touches the cover glass 30, and the touch panel 20 generates a position signal corresponding to the touch point. The cover glass 30 is disposed on the touch panel 20 for protecting the touch panel 20 . In addition, the liquid crystal panel 40 is disposed under the touch panel 20 for displaying a picture.

The inductive coil 100 of the above embodiment is disposed around the touch panel 20 for reacting with the electromagnetic pen to generate a pressure sensitive signal. In detail, as shown in FIGS. 1 and 2, the induction coil 100 includes a row of wires 120 and a connecting device 140. The wire 120 is disposed on a plane which, in this embodiment, is the surface of the liquid crystal panel 30, as shown in FIG. The cable 120 has a first end 122 and a second end 124 and has a plurality of wires 125. The cable 120 is bent a plurality of times to define a sensing area on the surface of the liquid crystal panel 30. The connecting device 140 is configured to connect the wires 125 at the first end 122 and the second end 124 such that the wires 125 form a plurality of turns formed by a single conductor wire.

Similarly, as shown in FIG. 3A, the wires 125 are arranged in a single layer in the wire 120. In other preferred embodiments, the wires are arranged in a double layer in the wire, as shown in Figures 3B and 3C, or in a plurality of layers. Specifically, the cable 120 is a flexible flat cable or a flexible printed circuit board.

Similarly, as shown in FIG. 1, the bending angles of the cable 120 are between 45 degrees and 135 degrees, such as about 90 degrees. In addition, each bend of the cable 120 has an overlap 129.

Similarly, as shown in FIG. 1, the connecting device 140 is a set of male and female connectors 142 and 144. As shown in FIG. 2, the connecting device 140 is a circuit board 145 having a plurality of contacts 1451. The contacts 1451 are electrically connected to the wires 125. The multi-turn line formed by the single conductor line is formed by one end of the wire 1251 as the input end In, and sequentially connected by the connection of the wire 1252, the wire 1253, the wire 1254 and the contact 1451 to form a four-turn line, and the wire 1252 One end is the output Out. The induction coil 100 sends/receives an electromagnetic signal (not shown) through the input terminal In and the output terminal Out to react with the electromagnetic pen to obtain the pressure sense corresponding to the pressure of the electromagnetic pen contacting the protective glass 30. Signal.

In summary, the present invention uses the cable 120 to bend around the touch panel 20 multiple times, so that the disadvantages of the above-mentioned prior art can be easily overcome. In addition, the jumper design of the connecting device 140 allows the parallel alignment of the wires 125 to be connected into a plurality of turns of a single conductor wire to form the inventive induction coil.

Although the present invention has been disclosed above in a preferred embodiment, it is not intended to limit the present invention. Various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application.

100‧‧‧Induction coil

120‧‧‧ cable

122‧‧‧ first end

124‧‧‧ second end

129‧‧‧ overlap

140‧‧‧Connecting device

142, 144‧‧‧ male and female connectors

Claims (19)

An induction coil of a touch input device comprises: a row of wires disposed on a plane, the cable having a first end and a second end and having a plurality of wires, the cable being bent a plurality of times to A sensing area is defined on the plane; and a connecting device is configured to connect the wires at the first end and the second end such that the wires form a plurality of turns formed by a single conductor line. The induction coil of the touch input device of claim 1, wherein the wires are arranged in a single layer in the cable. The induction coil of the touch input device of claim 1, wherein the wires are arranged in a double layer or a plurality of layers in the wire. The induction coil of the touch input device according to claim 1, wherein the cable has a bending angle, and the bending angle is between 45 degrees and 135 degrees. The induction coil of the touch input device of claim 4, wherein the bending angle is about 90 degrees. The induction coil of the touch input device of claim 1, wherein each bend of the cable has an overlap. The induction coil of the touch input device according to claim 1, wherein the cable is a soft flat cable or a flexible printed circuit board. The induction coil of the touch input device of claim 1, wherein the connection device is a set of male and female connectors. The induction coil of the touch input device according to claim 1, wherein the connection device The circuit board is provided with a plurality of contacts, and the contacts are electrically connected to the wires. A touch input device for sensing the position and pressure of an electromagnetic pen on a touch screen, the touch input device comprising: a touch panel for generating a position signal; and an induction coil disposed on the The touch panel is configured to react with the electromagnetic pen to generate a pressure sensing signal. The induction coil includes: a row of wires disposed on a plane, the cable has a first end and a second end and has a plurality of wires that are bent over a plurality of times to define a sensing area on the plane; and a connecting device for connecting the wires at the first end and the second end to form the wires A complex 匝 line that is wound by a single conductor line. The touch input device of claim 10, wherein the plane is a surface of a liquid crystal panel. The touch input device of claim 10, wherein the wires are arranged in a single layer in the wire. The touch input device of claim 10, wherein the wires are arranged in a double layer or a plurality of layers in the wire. The touch input device of claim 10, wherein the cable has a bending angle, the bending angle being between 45 degrees and 135 degrees. The touch input device of claim 14, wherein the bending angle is about 90 degrees. The touch input device of claim 10, wherein each of the bending wires of the cable There is an overlap. The touch input device of claim 10, wherein the cable is a soft flat cable or a flexible printed circuit board. The touch input device of claim 10, wherein the connecting device is a set of male and female connectors. The touch input device of claim 10, wherein the connection device is a circuit board having a plurality of contacts, and the contacts are electrically connected to the wires.