CN101578006B - ESD protection device for touch panel - Google Patents

Abstract

The invention is an electrostatic protection device of a touch panel, the electrostatic protection device includes a touch panel, a flexible circuit board and plural pairs of point discharge structures, the touch panel has plural signal wires and at least one ground wire, the ground wire is arranged at the periphery of the plural signal wires, and the flexible circuit board has plural signal wires and ground wires arranged outside the signal wires, the signal wires and the ground wires of the flexible circuit board are correspondingly connected with the signal wires and the ground wires of the touch panel, the point discharge structures are respectively formed on two adjacent signal wires, and a gap is provided between each pair of point discharge structures; the tip discharge structure can guide the static electricity of the touch panel to the ground line for discharge, thereby effectively protecting the touch panel.

Description

ESD protection device for touch panel

technical field

The invention relates to the technical field of a touch panel, in particular to an electrostatic protection device which is provided with a tip discharge structure on a touch panel and a flexible circuit board. the

Background technique

In recent years, with the improvement of panel technology and the popularization of electronic products by consumers, the application of touch panels has become more and more extensive. From some special purposes in the early days, many electronic products have gradually adopted touch panels. Panel, touch panel is already a popular and fast-growing application and market. the

However, when consumers use touch panels, they often need to touch the panel with their fingers due to the operation mode, so that the static electricity on the fingers will be conducted to the panel and affect the circuit in the panel. In other words, it is really a big damage. The screen and drive components of the LCD screen module itself will be damaged or affected by static electricity, and direct observation of the damage to the LCD screen module by electrostatic discharge can reveal some damage, such as screen defects, metal wires, etc. Melting, changes in the resistance of components, damage or breakdown of the oxide layer, and the influence of electronic circuits or controllers centered on microprocessors to cause erroneous actions, all of which greatly affect the service life of the touch panel and the transmission of input signals. reliability. the

Contents of the invention

In view of the deficiencies of the prior art, the purpose of the present invention is to provide an electrostatic protection device, which utilizes at least a sharp discharge structure between the signal wires of the touch panel to achieve the comprehensiveness and integrity of the electrostatic protection.

In order to achieve the above object, the present invention proposes an electrostatic protection device for the internal circuit of a touch panel, which includes: a touch panel with a plurality of signal wires and a ground wire inside the touch panel. The ground wire is arranged on the periphery of the plurality of signal wires; and a plurality of pairs of tip discharge structures are respectively formed between the adjacent signal wires and between the ground wire and the adjacent signal wires. the

In order to achieve the above object, the present invention proposes an electrostatic protection device for a touch panel and a flexible circuit board connected thereto, which includes: a touch panel, which has a plurality of signal wires and At least one ground wire, the ground wire is arranged on the periphery of the plurality of signal wires; a flexible circuit board, the flexible circuit board has a plurality of signal wires and at least one ground wire, the ground wire is arranged on the plurality of signal wires outside, and the signal wires and ground wires of the flexible circuit board are correspondingly connected with the signal wires and ground wires of the touch panel; a plurality of pairs of sharp discharge structures, and the sharp discharge structures are respectively formed between two adjacent signal wires between, and between the ground wire and adjacent signal wires. the

The static electricity protection device of the touch panel of the present invention can also only be provided with a tip discharge structure on each signal wire, instead of setting a tip discharge structure on the ground wire, so that static electricity can be dispersed on each signal wire through the tip discharge structure to achieve electrostatic protection. Effect. the

The present invention is applicable to the static protection of the internal circuit wiring of the touch panel and the flexible circuit board. No matter pressing any position of the touch panel, the static electricity transmitted from the outside to the signal wire can be directed to the outermost side of the panel more efficiently. And completely protected. the

In order to have a further understanding and recognition of the structure, purpose and effect of the present invention, a detailed description is given below with the help of diagrams. the

Description of drawings

Fig. 1 is a schematic diagram of a preferred embodiment of the present invention. the

FIG. 2 is a schematic diagram of a first form of the tip discharge structure of the present invention. the

FIG. 3 is a schematic diagram of a second form of the tip discharge structure of the present invention. the

Fig. 4 is a schematic diagram of a tip discharge structure inside a flexible circuit board. the

FIG. 5 is a schematic diagram of two ends of the flexible printed circuit connected to a touch panel and a liquid crystal panel. the

Description of main component symbols

10 signal wire

12 tip discharge structure

14 ground wire

15 corner end

20 touch panel

21 wire connection terminal

30 flexible circuit board

31, 32 pin terminal

40 LCD panels

41 wire connection port

Detailed ways

The technical means and effects used by the present invention to achieve the purpose will be described below with reference to the attached drawings, and the embodiments listed in the following drawings are only for auxiliary explanation, to facilitate understanding, but the technical means of the present invention are not limited The diagrams listed. the

Please refer to FIG. 1 , which is a schematic diagram of a preferred embodiment of the present invention. The touch panel 20 shown in the figure is a four-wire resistive type. There are four signal wires 10 and a ground wire 14 inside the touch panel 20. The ground wire 14 is arranged around the four signal wires 10. The outermost, and the two ends of the ground wire 14 are located at the outermost ends of the four signal wires 10, and a plurality of pairs are respectively formed between two adjacent signal wires 10 and between adjacent signal wires 10 and ground wires 14. Tip discharge structure 12 . the

The pointed discharge structures 12 are formed in pairs on both sides of the signal wire 10, the single side of the pointed discharge structure 12 is formed on one side of the ground wire 14, and at the position where the pointed discharge structure 12 is formed, each of the signal wires 10 and the ground wire 14 will be formed with pointed discharge structures 12 at the same horizontal position, and there is a gap D between each pair of pointed discharge structures 12, and the distance of each gap D is the same. The touch panel 20 applied in the present invention can be Capacitive or resistive, the resistive panel can be four-wire resistive or five-wire resistive, and is not limited to the description of the present invention. the

Please refer to FIG. 2 again, which is a schematic view of the first form of the tip discharge structure of the present invention. As shown in the figure, a number of tip discharge structures 12 are symmetrically formed on both sides of a signal wire 10. The tip discharge structures 12 are protruding and relatively formed between two signal wires 10. The tip discharge structures 12 are mainly of the same size. The triangular structure, or it can be acicular structure, etc. A point discharge structure can also be formed between the signal wire 10 and the ground wire 14 , and the plurality of point discharge structures 12 of each signal wire 10 and the ground wire 14 will be formed at the same horizontal position. In other words, at the position where the pointed discharge structure 12 is arranged, the signal wire 10 and the ground wire 14 at the same horizontal position are all formed with the pointed discharge structure 12, and at one end of the ground wire 14, the pointed discharge structure 12 is a single The edge is formed on the side of the ground wire 14 facing the signal wire 10, wherein the two opposite signal wires form a group, and there is a gap D between each group of pointed discharge structures 12, and the distance of each gap D is the same, the gap D enables the static electricity to be transmitted from one tip discharge structure 12 to the other tip discharge structure 12 , and the static electricity to be transmitted from the inside to the outside to the ground wire 14 , so that it can be guided out from the ground wire 14 . the

Please refer to FIG. 3 again, which is a schematic diagram of a second form of the tip discharge structure of the present invention. In this embodiment, when the signal wire 10 is arranged to be bent at a right angle, any side of the intersection of the signal wire 10 at a right angle is formed with a pointed discharge structure 12, in other words, it is the corner end 15 of the vertical side and the horizontal side outside the right angle. A pointed discharge structure 12 is formed on either side. the

Please refer to FIG. 4 again, which is a schematic diagram of the tip discharge structure inside the flexible circuit board. Shown in the figure is a flexible circuit board 30, which has a plurality of signal wires 10 inside, a ground wire 14 formed on at least one of the outermost sides of the left and right sides, and a plurality of pairs of tip discharge structures 12, which are respectively formed on two adjacent sides. There is a gap D between each pair of tip discharge structures 12 on the signal wire 10 and the adjacent signal wire 10 and the ground wire 14 . the

Referring to FIG. 5 again, the signal wires 10 and ground wires 14 inside the flexible circuit board 30 must be connected to the signal wires 10 and ground wires 14 inside the touch panel (see FIG. 1 ). In other words, the number and layout positions of the signal wires 10 and ground wires 14 on the pin end 31 of the flexible circuit board 30 must correspond to the signal wires 10 and ground wires on the connection port (not shown) of the touch panel 14, the number and layout position, so that when the pin end 31 of the flexible circuit board 30 is connected to the connection port of the touch panel, the static electricity in the touch panel can be exported to the touch panel through the above connection , so that the touch panel is affected by static electricity to a minimum. the

The pin end 31 of the flexible circuit board 30 is electrically connected to the wire connection end 21 of the touch panel with conductive glue, and the other pin end 32 of the flexible circuit board 30 is connected to the liquid crystal panel 40 The wire connection port 41 is used for electrical connection. the

However, the above descriptions are merely examples of the present invention, and should not be used to limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the scope of the patent application of the present invention should still fall within the scope covered by the patent of the present invention. the

Claims (6)

1. An electrostatic protection device for a touch panel, comprising: A touch panel, the touch panel has a plurality of signal wires and a ground wire, and the ground wire is arranged around the plurality of signal wires; and Plural pairs of tip discharge structures are respectively formed between the adjacent signal wires, and between the ground wire and the adjacent signal wires. 2. The electrostatic protection device for a touch panel according to claim 1, wherein the ground wire is arranged around the outermost periphery of the plurality of signal wires, and both ends of the ground wire are located at the outermost ends of the plurality of signal wires. outside. 3 . The electrostatic protection device for a touch panel according to claim 1 , wherein the pointed discharge structures are formed in pairs on both sides of the signal wire. 4 . 4. An electrostatic protection device for a touch panel, comprising: A touch panel, the touch panel has a plurality of signal wires and at least one ground wire, and the ground wire is arranged around the plurality of signal wires; A flexible circuit board, the flexible circuit board has a plurality of signal wires and at least one ground wire, the ground wire is arranged outside the plurality of signal wires, and the signal wires and ground wires of the flexible circuit board are connected to the contact Corresponding connection of the signal wire and the ground wire of the control panel; Plural pairs of tip discharge structures are respectively formed between two adjacent signal wires, and between the ground wire and adjacent signal wires. 5. The electrostatic protection device for a touch panel according to claim 4, wherein the ground wire is arranged around the outermost periphery of the plurality of signal wires, and both ends of the ground wire are located at the outermost ends of the plurality of signal wires outside. 6 . The electrostatic protection device for a touch panel as claimed in claim 4 , wherein two ends of the flexible circuit board are respectively electrically connected to the touch panel and a liquid crystal panel.

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