TW201506714A - Touch apparatus - Google Patents

Abstract

The present invention relates to a touch apparatus. The touch apparatus includes a display module, a circuit board, a first frame and a touch module. The circuit board electronically coupled to the display module and drives the display module. The display module and the circuit board are accommodated in the first frame. The first frame includes several conductive structures. The conductive structures is electronically connected to the circuit board and coupled to the ground through the circuit board. The touch module includes sensor electrodes, an insulation layer, and a conductive layer. The sensor electrodes receive operation from a user. The insulation layer is located between the sensor electrodes and the display module. The insulation layer insulates the electron-magnetic interference(EMI)between the display module and the sensor electrodes. The conductive layer locates between the insulation layer and the first frame, and electronically connects the insulation layer and the conductive structures of the first frame.

Description

Touch device

The invention relates to a touch device.

At present, the touch device usually consists of a display module and a touch module. However, after the display module and the touch module are attached together, electromagnetic interference often occurs between the display module and the touch module. In turn, the stability of the operation of the touch device is affected. In the prior art, an isolation layer is disposed on an opposite side of a substrate (usually a glass substrate) on which a sensing electrode is disposed in a touch module, and a grounding conductive strip connecting the isolation layer is disposed on an FPC (Flexible Printed Circuit). The conductive sheet is crossed or folded back to the side where the isolation layer is located, and the isolation layer is electrically connected to the ground conductive sheet on the FPC by an ACF (Anisotropic Conductive Film bonding) process. However, setting the grounding conductive strip on the FPC increases the area of the FPC, and when the grounding conductive sheet is close to the edge of the sensing electrode, it is easy to cause the glass substrate where the sensing electrode is broken or the grounding conductive sheet to be cut by the glass substrate and other undesirable factors. presence. In addition, the ACF binding process is complicated, and the position of the grounding conductive strip is not easily fixed, resulting in poor product.

In view of this, it is necessary to provide a touch device that is simple in process and high in product yield.

A touch device includes:

a display module, the display module includes: a display panel, a circuit board, and a first frame; the circuit board is electrically connected to the display panel for driving the display panel; the first frame houses the circuit board and the display panel, The first frame has an at least partially conductive structure electrically connected to the circuit board and grounded through the circuit board;

The touch module includes:

a sensing electrode for receiving a touch operation;

An isolation layer is disposed between the sensing electrode and the display module for isolating electromagnetic interference between the display module and the touch electrode;

And a conductive layer disposed between the isolation layer and the first frame to electrically connect the isolation layer and the conductive structure of the first frame.

Compared with the prior art, the touch device is electrically connected to the isolation layer through a conductive layer, and is grounded by the conductive structure of the first frame, the process is relatively simple, and the conductive layer has a large area and is electrically connected to the conductive structure. The yield is high. The technical effect of simplifying the process and improving the yield of the product is achieved. In addition, the conductive layer further transmits the static electricity of the isolation layer to the ground through the conductive structure, thereby reducing the influence of static electricity on the touch device.

1‧‧‧ touch device

10‧‧‧ display module

30‧‧‧Touch Module

50‧‧‧ Conductive layer

11‧‧‧ first frame

12‧‧‧ display panel

13‧‧‧Backlight module

14‧‧‧ boards

15‧‧‧second framework

31‧‧‧protective glass

32‧‧‧Sensor substrate

51‧‧‧foam

52‧‧‧Electrical film

53‧‧‧Conductive adhesive

111‧‧‧Electrical structure

131‧‧‧ plastic frame

132‧‧‧Light guide plate

133‧‧‧ source

141‧‧‧Flexible circuit board

321‧‧‧ first surface

322‧‧‧ second surface

3211‧‧‧Sensor electrode

3221‧‧‧Isolation

531‧‧‧Adhesive materials

532‧‧‧ metal particles

FIG. 1 is a perspective exploded view of a touch device according to the present invention.

2 is a schematic view showing the assembly of the touch device of the present invention.

Figure 3 is a cross-sectional view taken along line III-III of Figure 2;

FIG. 4 is an enlarged schematic view showing the conductive layer of the touch device of FIG. 3 bonded to the sensing substrate by the conductive paste and the first frame.

The invention will now be described in detail with reference to the accompanying drawings. Please refer to Figure 1, Figure 2 and Figure 3. FIG. 1 is a perspective exploded view of the touch device of the present invention. 2 is a schematic view showing the assembly of the touch device of the present invention. Figure 3 is a cross-sectional view taken along line III-III of Figure 2; The touch device 1 includes a display module 10 , a touch module 30 , and a conductive layer 50 .

The display module 10 includes a first frame 11 , a display panel 12 , a backlight module 13 , a circuit board 14 , and a second frame 15 . The first frame 11 is a hollow frame that cooperates with the second frame 15 to form a receiving space for receiving the display panel 12 , the backlight module 13 and the circuit board 14 . In this embodiment, the first frame 11 is a metal frame, and the conductive structure 111 is a metal piece. The conductive structure 111 extends inwardly from a sidewall of the first frame 11 adjacent to the light-emitting surface of the display panel 12 and The first frame 111 is integrally formed. In other embodiments, the first frame 11 may not be a metal frame. In this case, the conductive structure 111 is located in an extending direction of the sidewall of the first frame 11 adjacent to the light-emitting surface of the display panel 12 . The backlight module 13 is located between the display panel 12 and the second frame 15 for providing a backlight for the display panel 12. The backlight module 13 includes a plastic frame 131, a light guide plate 132, and a light source 133. The light source 133 is disposed on a side surface of the light guide plate 132. The light guide plate 132 is disposed adjacent to the second frame 15 for converting the light emitted from the light source 133 into a uniform surface light source and providing the same to the display panel 12. A surface of the second frame 15 adjacent to the light guide plate 132 is a plane having a high reflectivity to reflect light emitted from the light guide plate 132 adjacent to the second frame 15 to the light guide plate 132. The plastic frame 131 is disposed adjacent to the light emitting surface of the light guide plate 132 for cooperating with the second frame 15 to receive the light guide plate 132 and the light source 133. At the same time, the plastic frame 131 and the first frame 11 cooperate to fix the display panel 12. The circuit board 14 includes a flexible circuit board 141. The circuit board 14 is electrically connected to the display panel 12 by the flexible circuit board 141 to supply power to the display panel 12 and provide a driving signal, and is electrically connected by the flexible circuit board 141. The conductive structure 111 of the first frame 11 is grounded through the circuit board 14.

The touch module 30 includes a cover glass 31 and a sensing substrate 32 . The sensing substrate 32 includes two opposing surfaces: a first surface 321 and a second surface 322. The first surface 321 is away from the surface of the display module 10, and the first surface 321 is provided with a sensing electrode 3211 for receiving a touch operation of the user. The protective glass 31 is disposed adjacent to the first surface 321 for protecting the electrodes of the sensing electrode 3211. The protective glass 31 can be bonded to the sensing substrate 32 by optical glue. The second surface 322 is adjacent to the surface of the display module 10 , and the second surface 322 is provided with an isolation layer 3221 . The isolation layer 3221 is configured to isolate electromagnetic interference between the display module 10 and the touch module 30. The isolation layer 3221 is a transparent conductive film. In the present embodiment, the isolation layer 3221 is an ITO (Indium tin oxide) layer. It can be understood that the isolation layer 3221 can also be other materials suitable for shielding electromagnetic waves, such as indium oxide, tin oxide, indium zinc oxide, gold, silver, copper, and combinations thereof. In the present embodiment, the isolation layer 3221 is sputter-sputtered on the second surface 322 to cover all of the second surface 322 for an optimal shielding effect.

The conductive layer 50 is a hollow frame structure located between the isolation layer 3221 and the first frame 11 and electrically connected to the isolation layer 3221 and the conductive structure 111. The conductive layer 50 is attached to the edge of the isolation layer 3221. In this embodiment, the isolation layer 3221 and the conductive layer 50 are adapted to the shape of the touch device 1. The isolation layer 3221 covers all of the second surface 322. The conductive layer 50 includes four sides connected end to end. The sides of the strip are attached to the outermost side of the spacer layer 3221. That is, the distance between the two opposite short sides of the conductive layer 50 is equal to the length of the isolation layer 3221, and the distance between the two outer sides of the opposite sides of the conductive layer 50 is equal to the width of the isolation layer 3221. With such an arrangement, the conductive layer 50 can achieve a large area contact with the isolation layer 3221, and the grounding impedance can be effectively reduced, and the conductive layer 50 is disposed on the outermost side of the isolation layer 3221 to achieve antistatic performance. Good dust and water resistance. Preferably, the conductive layer 50 is disposed corresponding to the non-touch area of the touch device 1 .

Please refer to FIG. 4 , which is an enlarged schematic view showing the conductive layer in the touch device of FIG. 3 bonded to the sensing substrate by the conductive paste and the first frame. The conductive layer 50 is a conductive foam comprising a foam 51 and a conductive film 52 surrounding the outside of the foam 51. The foam 51 has a good elastic stretching function, and the conductive film 52 is a metal film. The metal film may be an aluminum film, a copper film or a metal alloy film, so that the conductive layer 50 has a good elastic stretching function and also has a conductive property. The touch device 1 also has a good anti-shock effect.

In the embodiment, the conductive layer 50 is attached to the isolation layer 3221 and the first frame 11 by a conductive paste 53. The conductive paste 53 is a conductive adhesive comprising a viscous material 531 and metal particles 532 distributed in the viscous material 531. The viscous material 531 may be a viscous resin material, and the metal particles 532 may be metal particles such as conductive metal silver particles or copper particles. The conductive paste 53 maintains conductivity by contact between the metal particles 532. The conductive adhesive 53 attaches the conductive layer 50 and the isolation layer 3221 in a continuous manner, and attaches the conductive layer 53 and the first frame 11 in a continuous manner to increase the conductive layer and the isolation layer 3221 and the The attachment effect of the first frame 11 and the reduction of the contact resistance.

Compared with the prior art, the touch device 1 is electrically connected to the isolation layer 3221 in a conductive layer 50, and is grounded by the conductive structure 111 of the first frame 11. The process is relatively simple, and the conductive layer 50 has a large area. The conductive structure 11 is electrically connected, and the product yield is high. The technical effect of simplifying the process and improving the yield of the product is achieved. In addition, the conductive layer 50 further has the static electricity of the isolation layer 3221 transmitted to the ground through the conductive structure 111, thereby reducing static electricity to the touch device 1 . Impact.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments. Without departing from the spirit and scope of the technical solutions of the present invention.

no

1‧‧‧ touch device

50‧‧‧ Conductive layer

11‧‧‧ first frame

12‧‧‧ display panel

15‧‧‧second framework

31‧‧‧protective glass

32‧‧‧Sensor substrate

53‧‧‧Conductive adhesive

111‧‧‧Electrical structure

131‧‧‧ plastic frame

132‧‧‧Light guide plate

133‧‧‧Light source

Claims (11)

A touch device includes:
a display module, the display module includes: a display panel, a circuit board, and a first frame; the circuit board is electrically connected to the display panel for driving the display panel; the first frame houses the circuit board and the display panel, The first frame has an at least partially conductive structure electrically connected to the circuit board and grounded through the circuit board;
The touch module includes:
a sensing electrode for receiving a touch operation;
An isolation layer is disposed between the sensing electrode and the display module for isolating electromagnetic interference between the display module and the touch electrode;
And a conductive layer disposed between the isolation layer and the first frame to electrically connect the isolation layer and the conductive structure of the first frame. The touch device of claim 1, wherein the spacer material is ITO. The touch device of claim 1, wherein the conductive layer is attached to an edge of the isolation layer. The touch device of claim 3, wherein the distance between the outermost sides of the two shorter opposite sides of the conductive layer is equal to the length of the isolation layer, and the other two longer opposite sides The distance between the outermost sides is equal to the width of the isolation layer. The touch device of claim 1, wherein the conductive layer is disposed corresponding to the non-touch area of the touch device. The touch device of any one of claims 1 to 5, wherein the conductive layer is a conductive foam. The touch device of claim 6, wherein the conductive foam comprises a foam and a conductive film surrounding the outer surface of the foam, the conductive film being a metal film. The touch device of claim 7, wherein the conductive layer is attached to the isolation layer and the first frame by a conductive adhesive. The touch device of claim 7, wherein the conductive paste comprises a viscous material and metal particles distributed in the viscous material. The touch device of claim 8, wherein the conductive paste is attached between the isolation layer and the conductive layer and the first frame and the conductive layer in a continuous manner. The touch device of claim 1, wherein the first frame is a metal frame, and the conductive structure extends from a side wall of the first frame adjacent to the light emitting surface of the display panel, and is integrated with the first frame forming.