Effective electrostatic protection device of touch screen ITO-Film

Abstract

The invention relates to the technical field of electrostatic protection equipment, in particular to a touch screen ITO-Film effective electrostatic protection device which comprises a substrate, a plurality of ITO-Films are arranged on the substrate, a main ground wire is arranged on the inner side wall of the substrate in a surrounding mode, a plurality of X-direction ground wires and a plurality of Y-direction ground wires are arranged in ineffective areas between the adjacent ITO-Films according to the positions of the ITO-Films in the substrate, and the X-direction ground wires and the Y-direction ground wires are arranged in the ineffective areas between the adjacent ITO-Films. The X-direction ground wire and the Y-direction ground wire are electrically connected with the adjacent ITO-Film, the X-direction ground wire and the Y-direction ground wire are perpendicular to each other, and the X-direction ground wire and the Y-direction ground wire are electrically connected to the main ground wire. According to the invention, a plurality of X-direction ground wires and Y-direction ground wires which are wide and thick enough are arranged in an invalid area between adjacent touch screen ITO-Films to conduct charges, and grounding processing is carried out through a main ground wire which is wide and thick enough, so that ESD generated during production testing of the touch screen ITO-Films is effectively absorbed and transferred; and the yield of ITO-Film production of the touch screen is greatly increased.

Description

Technical Field

[0001] The invention relates to the technical field of electrostatic protection equipment, in particular to an effective electrostatic protection device for a touch screen ITO-Film. Background Art

[0002] ITO-Film is an n-type semiconductor material with high conductivity, high visible light transmittance, high mechanical hardness and good chemical stability. Therefore, it is the most commonly used thin film material for transparent electrodes of touch panels and other electronic instruments.

[0003] When performing ESD testing on touch screens, ESD (ElectroStatic Discharge) occurs very quickly with extremely high intensity, and combined with electron proton irradiation, it can cause surface charging and body charging effects on ITO materials. Although ITO-Film has a certain conductivity, which can eliminate the surface charging effect, since ITO-Film is only a dozen nanometers thick, the energy of electron protons during irradiation is sufficient to penetrate ITO into the base material to produce body charging effects. Such body charging effects generate a very strong electric field, causing the local potential to exceed the breakdown voltage of the material and cause discharge (as shown in the attached manual). Figure 1 The figure shows the charge direction diagram when the ITO channel of ITO-Film bears the charge alone when ESD occurs. Figure 1 For the convenience of expression, only the charge movement of one ITO channel in ITO-Film is shown). The instantaneous current generated during discharge releases a large amount of heat, causing the local temperature of the substrate surface to rise sharply and affecting the ITO-Film structure. Therefore, we propose an effective electrostatic protection device for touch screen ITO-Film to effectively eliminate the electrostatic damage to the ITO-Film of the touch screen caused by ESD. Summary of the invention

[0004] The object of the present invention is to provide an effective electrostatic protection device for ITO-Film of a touch screen to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An effective electrostatic protection device for a touch screen ITO-Film, comprising:

[0007] A substrate, wherein a plurality of ITO-Films are arranged on the substrate, a main ground line is arranged around the inner side wall of the substrate, and a plurality of X-direction ground lines and a plurality of Y-direction ground lines are arranged in an invalid area between adjacent ITO-Films according to the positions of the ITO-Films in the substrate, the X-direction ground lines and the Y-direction ground lines are both electrically connected to the adjacent ITO-Films, the X-direction ground lines and the Y-direction ground lines are arranged perpendicular to each other, and the X-direction ground lines and the Y-direction ground lines are both electrically connected to the main ground line.

[0008] Preferably, the main ground wire, the X-direction ground wire and the Y-direction ground wire are all made of ITO material.

[0009] Preferably, the main ground line and the ITO-Film adjacent thereto are connected to each other.

[0010] Preferably, any of the X-direction ground lines is electrically connected to the Y-direction ground line that is perpendicular to it.

[0011] Preferably, the main ground wire, the X-direction ground wire and the Y-direction ground wire are an integrated structure.

[0012] Preferably, the width of the main ground wire is in the range of 15-20 mm.

[0013] Preferably, the width of the X-direction ground line and the Y-direction ground line is in the range of 2-5 mm.

[0014] Preferably, the main ground line is provided with a plurality of alignment targets and alignment grid blocks for laser cutting positioning.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a plurality of sufficiently wide and thick X-direction ground wires and Y-direction ground wires in the ineffective area between adjacent touch screen ITO-Films to conduct charge and performs grounding through a sufficiently wide and thick main ground wire, thereby effectively absorbing and transferring the ESD generated during the production test of the touch screen ITO-Film, greatly increasing the yield rate of the touch screen ITO-Film production, and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of charge movement when ITO-Film bears the charge alone when ESD occurs (the direction of the hollow arrow in the figure represents the charge movement);

[0017] Figure 2 A schematic diagram of the structure of the present invention from above;

[0018] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure of area A in the middle (the direction of the hollow arrow in the figure represents the movement of charges).

[0019] In the figure: 1 substrate, 2 ITO-Film, 3 main ground wire, 4 X-direction ground wire, 5 Y-direction ground wire, 6 alignment target, 7 alignment grid block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Please refer to the instruction manual Figure 1-3 , the present invention provides a technical solution:

[0022] An effective electrostatic protection device for touch screen ITO-Film, as shown in the attached manual Figure 2 As shown, including:

[0023] Substrate 1. In the present embodiment, substrate 1 is a rectangular structure. Several ITO-Films 2 are arranged on substrate 1. A main ground line 2 is arranged around the inner wall of substrate 1. The main ground line 2 is grounded. According to the position of ITO-Film 2 in substrate 1, the area between adjacent ITO-Film 2 inside substrate 1 is an invalid area. Several X-direction ground lines 4 and several Y-direction ground lines 5 are arranged in the invalid area between adjacent ITO-Film 2. Several X-direction ground lines 4 and several Y-direction ground lines 5 fill the invalid area between adjacent ITO-Film 2, and the X-direction ground lines 4 and the Y-direction ground lines 5 are electrically connected to adjacent ITO-Film 2. The X-direction ground lines 4 and the Y-direction ground lines 5 are arranged perpendicular to each other, and the X-direction ground lines 4 and the Y-direction ground lines 5 are electrically connected to the main ground line 2.

[0024] In this embodiment, the main ground wire 2 , the X-direction ground wire 4 and the Y-direction ground wire 5 are all made of ITO material. The ITO material has excellent electrical conductivity and can conduct current efficiently.

[0025] The main ground line 2 and the ITO-Film 2 adjacent thereto are electrically connected to each other, so the ITO-Film 2 connected to the main ground line 2 can directly transfer the charge through the main ground line 2 after generating the charge, thereby achieving the technical effect of ESD elimination.

[0026] Any X-direction ground line 4 is electrically connected to the Y-direction ground line 5 perpendicular to it. The main ground line 2, the X-direction ground line 4 and the Y-direction ground line 5 are an integrated structure. Therefore, the charge can be directly transferred through any ground line around the ITO-Film 2 (including the main ground line 2, the X-direction ground line 4 and the Y-direction ground line 5). Figure 3 As shown in the instruction manual Figure 3 The charge movement is marked in the manual. Figure 3 The purpose of this is only to express that in this application, the charges will move along the ground wires (including the main ground wire 2, the X-direction ground wire 4 and the Y-direction ground wire 5), and it does not limit the movement direction of the charges in actual use. This is hereby explained.

[0027] The width of the main ground line 2 is in the range of 15-20 mm, and the width of the X-direction ground line 4 and the Y-direction ground line 5 is in the range of 2-5 mm. Since the touch screen ITO-Film 2 needs to be cut after the ESD test, the cut main ground line 2, the X-direction ground line 4 and the Y-direction ground line 5 cannot be reused and can only be treated as waste. When the width of the main ground line 2 is in the range of 15-20 mm and the width of the X-direction ground line 4 and the Y-direction ground line 5 is in the range of 2-5 mm, it can meet the rapid absorption and transfer of ESD during production testing. The width of the main ground line 2, the X-direction ground line 4 and the Y-direction ground line 5 in the above two ranges also reduces the generation of waste and saves production costs.

[0028] The main ground line 2 is provided with a number of alignment targets 6 and alignment grid blocks 7 for laser cutting positioning. In the present embodiment, the main ground line 2 is a rectangular frame structure, and alignment targets 6 are provided on the four corners of the main ground line 2, and two alignment grid blocks 7 are provided on the sides of the main ground line 2. The alignment targets 6 and alignment grid blocks 7 are used to facilitate the alignment of the ITO-Film 2 for laser cutting, so as to facilitate the cutting of the main ground line 2, the X-direction ground line 4 and the Y-direction ground line 5. When the alignment targets 6 and the alignment grid blocks 7 are set on the main ground line 2, the two will be cut together when the main ground line 2 is cut, which saves the operation time and improves the work efficiency.

[0029] Working principle: During production testing, when charges are generated inside the ITO-Film 2, the charges can be directly conducted (grounded) through the main ground wire 2, X-direction ground wire 4 or Y-direction ground wire 5 connected thereto, effectively eliminating ESD damage.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An effective electrostatic protection device for touch screen ITO-Film, characterized in that: include: A substrate, wherein a plurality of ITO-Films are arranged on the substrate, a main ground line is arranged around the inner side wall of the substrate, and a plurality of X-direction ground lines and a plurality of Y-direction ground lines are arranged in an invalid area between adjacent ITO-Films according to the positions of the ITO-Films in the substrate, the X-direction ground lines and the Y-direction ground lines are both electrically connected to the adjacent ITO-Films, the X-direction ground lines and the Y-direction ground lines are arranged perpendicular to each other, and the X-direction ground lines and the Y-direction ground lines are both electrically connected to the main ground line.

2. An effective electrostatic protection device for touch screen ITO-Film according to claim 1, characterized in that: The main ground wire, the X-direction ground wire and the Y-direction ground wire are all made of ITO material.

3. An effective electrostatic protection device for touch screen ITO-Film according to claim 2, characterized in that: The main ground line and the ITO-Film adjacent thereto are connected to each other.

4. An effective electrostatic protection device for touch screen ITO-Film according to claim 3, characterized in that: Any of the X-direction ground lines is electrically connected to the Y-direction ground line that is perpendicular to the X-direction ground line.

5. An effective electrostatic protection device for touch screen ITO-Film according to claim 4, characterized in that: The main ground wire, the X-direction ground wire and the Y-direction ground wire are an integrated structure.

6. An effective electrostatic protection device for touch screen ITO-Film according to claim 1, characterized in that: The width of the main ground line is in the range of 15-20 mm.

7. An effective electrostatic protection device for touch screen ITO-Film according to claim 1, characterized in that: The width of the X-direction ground line and the Y-direction ground line is in the range of 2-5 mm.

8. An effective electrostatic protection device for touch screen ITO-Film according to claim 1, characterized in that: The main ground line is provided with a plurality of alignment targets and alignment grid blocks for laser cutting positioning.

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