Oversized capacitive metal grid

Abstract

The utility model discloses an oversized capacitive metal grid which comprises a capacitive metal grid body, corner areas are arranged on the edges of the capacitive metal grid body, a metal frame is arranged on the outer side of each corner area, a silica gel layer is arranged between each metal frame and the corresponding corner area, and the capacitive metal grid body comprises a transparent substrate. A transmitting layer is arranged on the upper surface of the transparent substrate, a grounding wire is arranged at the bottom of the transparent substrate, a receiving layer is arranged at the bottom of the grounding wire, and the grounding wire is of a gridding structure and is arranged at an angle of 45 degrees with the horizontal position; through the gridding structure and the 45-degree arrangement of the grounding wires, the influence on capacitance values of adjacent channels can be reduced, the sensing precision and performance of the touch screen are improved, the grounding wires are specially designed in the four corner areas, stray capacitance is reduced, the deviation between the capacitance values of the corner areas and the capacitance value of the central area is smaller than 35%, and the stability of the touch screen is improved. And the overall induction consistency of the touch screen is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of metal grid, specifically to a super large size capacitive metal grid. BACKGROUND

[0002] The touch film technology on the market at present mainly adopts several different film materials, including Metal Mesh metal grid, nano silver, ITO (indium tin oxide), nano imprinting and the like, and the manufacturing process of these touch films usually involves coating processing on PET (polyethylene terephthalate) or glass or the like substrate material to form a conductive layer, so as to obtain a conductive base material, and on the basis, the X, Y axis electrical channel grid is designed to realize the touch function.

[0003] In the traditional touch film design, there is a common problem that the capacitance of the four corners of the capacitive touch film is usually about 35% larger, and the non-uniformity of the capacitance will lead to inaccurate touch recognition, especially in the edge area of the touch screen, which may affect the operation experience of the user and the accuracy of the touch screen. INVENTION CONTENTS

[0004] The utility model discloses a super large size capacitive metal grid to solve the problem in the above background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a super large size capacitive metal grid, including capacitive metal grid, the edge of capacitive metal grid is provided with corner area, the outside of corner area is provided with metal frame, is provided with silica gel layer between metal frame and corner area, and capacitive metal grid includes transparent substrate, the upper surface of transparent substrate is provided with emission layer, the bottom of transparent substrate is provided with ground wire, and the bottom of ground wire is provided with receiving layer.

[0006] Preferably, the ground wire is a grid structure and is arranged at 45 degrees to the horizontal position.

[0007] Preferably, the signal line of the emission layer is laid above the ground wire in the corner area.

[0008] Preferably, the lines covered by the grid ground wire are staggered with the signal lines of the emission layer.

[0009] Preferably, the metal frame and the ground wire are electrically connected.

[0010] Preferably, the metal frame and the grid ground wire form an integrated mechanical connection.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1.The utility model discloses a grid structure of grounding wire and 45 degree setting help to reduce the influence on adjacent channel capacitance value, improve the sensing accuracy and performance of touch -sensitive screen, and the grounding wire is specially designed in four corner areas, reduces the parasitic capacitance, makes the corner capacitance value and the deviation of central area capacitance value less than 35%, ensures the consistency of the whole sensing of touch -sensitive screen.

[0013] 2.The utility model discloses the adhesion of silica gel layer provides the buffer between metal frame and other parts of touch -sensitive screen, can absorb external impact, reduces internal stress accumulation to improve the durability and reliability of touch -sensitive screen, and metal frame effectively protects the edge of touch -sensitive screen, prevents the edge damage that can occur in daily use or transportation process. DRAWINGS

[0014] Fig. 1 It is the structure schematic diagram of the utility model capacitive metal mesh.

[0015] Fig. 2 It is the stack diagram of the utility model capacitive metal mesh.

[0016] Fig. 3 It is the structure schematic diagram of the utility model grounding wire.

[0017] In the drawing: capacitive metal mesh 1;Transparent substrate 11;Emission layer 12;Receiving layer 13;Grounding wire 14;Corner area 2;Silica gel layer 3;Metal frame 4. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0019] Please refer to Figs. 1 to 3 The utility model provides a kind of technical scheme: a kind of super large size capacitive metal mesh, including capacitive metal mesh 1, corner area 2 is provided at the edge of capacitive metal mesh 1, the outside of corner area 2 is provided with metal frame 4, and metal frame 4 is used to enhance the mechanical strength of touch -sensitive screen and prevent edge damage.

[0020] The metal frame 4 is bonded with the silica gel layer 3 between the corner area 2, the silica gel layer 3 is used to provide a buffer between the metal frame and other parts of the touch screen to absorb external impact and prevent internal stress accumulation, the capacitive metal mesh 1 comprises a transparent substrate 11, the upper surface of the transparent substrate 11 is bonded with an emission layer 12, the bottom of the transparent substrate 11 is bonded with a ground line 14, and the bottom of the ground line 14 is bonded with a receiving layer 13.

[0021] The ground line 14 is in a mesh structure and is arranged at 45 degrees with the horizontal position, which is used to reduce the influence on the adjacent channel capacitance value, the signal line of the emission layer 12 is laid above the corner area 2 with the ground line 14, which is used to take away or isolate the excess parasitic capacitance, the lines covered by the meshed ground line 14 are staggered with the signal lines of the emission layer 12, which is used to minimize the influence on the capacitance value of the adjacent channel, and the mesh structure of the ground line 14 is specially designed in the four corner areas to reduce the parasitic capacitance, so that the deviation of the corner capacitance value and the center area capacitance value is less than 35%.

[0022] The metal frame 4 is electrically connected with the ground line 14, which is used to further shield the electromagnetic interference of the edge area, the metal frame 4 and the meshed ground line 14 form an integrated mechanical connection, which improves the overall stability and consistency of the touch response.

[0023] On the super-large size metal mesh capacitive screen, the four corners belong to the outermost edge, and there is parasitic capacitance with the solder pads and signal lines on the edge of the circuit board, which affects the capacitance value, so it is necessary to lay the ground line 14 on the signal line of the TX layer to cover and take away or isolate the excess parasitic capacitance, if the copper is laid in large area, the copper will affect the capacitance value of the adjacent channel, and the ground line 14 is made into a mesh structure, which will reduce the influence of the ground line 14 on the capacitance value of the adjacent channel.

[0024] The metal frame 4 is introduced as an edge reinforcing structure, the metal frame 4 is electrically connected with the meshed ground line 14 and provides additional electromagnetic shielding, and the silica gel layer 3 is used to form a buffer between the metal frame 4 and the main body of the touch screen to protect the touch screen from mechanical damage.

[0025] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An oversized capacitive metal mesh comprising a capacitive metal mesh (1), characterized in that: The edge of the capacitive metal mesh (1) is provided with a corner area (2), the outer side of the corner area (2) is provided with a metal frame (4), a silica gel layer (3) is arranged between the metal frame (4) and the corner area (2), the capacitive metal mesh (1) comprises a transparent substrate (11), the upper surface of the transparent substrate (11) is provided with an emission layer (12), the bottom of the transparent substrate (11) is provided with a ground wire (14), and the bottom of the ground wire (14) is provided with a receiving layer (13).

2. The ultra-large size capacitive metal mesh according to claim 1, wherein: The ground wire (14) is in a grid structure and is arranged at an angle of 45 degrees with the horizontal position.

3. The ultra-large size capacitive metal mesh according to claim 1, wherein: The signal line of the emission layer (12) is laid above the ground wire (14) in the corner area (2).

4. The ultra-large size capacitive metal mesh according to claim 1, wherein: The lines covered by the grid-shaped ground wire (14) are staggered with the signal lines of the emission layer (12).

5. The ultra-large size capacitive metal mesh according to claim 1, wherein: The metal frame (4) is electrically connected with the ground wire (14).

6. The ultra-large size capacitive metal mesh according to claim 1, wherein: The metal frame (4) is integrally mechanically connected with the grid-shaped ground wire (14).

Images