TWI494808B - Touch screen and manufacturing method thereof - Google Patents

Description

Touch screen and manufacturing method thereof

The invention relates to a touch technology, in particular to a touch screen and a manufacturing method thereof.

In recent years, touch panels have been widely used. Touch screens using touch panels, also known as touch screens, are inductive display devices that can receive input signals generated by touch operations.

A general touch screen includes a touch module and a display module. The touch module and the display module are integrated in various ways, for example, by an auxiliary device for snap-fit and by a colloidal fit. Among them, in the manner of bonding the glue, there is a bonding method called full-paste, that is, a whole surface optical glue is disposed on one surface of the touch module or the display module, and then the two are attached. In this manner, since the surface of the display module for bonding is not completely flat, that is, the peripheral area provided with the frame is higher than the middle bonding area, the higher peripheral area is avoided when the colloid is disposed, and only The colloid is disposed in the bonding area to avoid the problem of poor bonding of bubbles and the like due to the unevenness of the bonding surface. In addition, the peripheral areas of some display modules are not provided with a frame, that is, the surface to be laminated is flat. However, in order to avoid the overflow of the colloid, the surrounding area is also avoided when the colloid is disposed, and only the colloid is disposed in the bonding area. Since the colloid has a certain thickness, in the display module without the bezel, the thickness of the colloid itself may cause a gap between the display module and the touch module in the peripheral area, and in the display module with the bezel, the glue The thickness of the body is greater than the height of the frame, so that there is a gap between the display module and the touch module in the peripheral area. When the user uses the peripheral area, the display module is deformed due to pressure. Therefore, water ripple and the like are generated, which seriously affects the display effect of the display module.

The invention provides a touch screen capable of effectively solving edge water ripple phenomenon and a manufacturing method thereof.

A touch screen includes a central bonding area and a peripheral area surrounding the central bonding area, the touch screen includes a touch module and a display module, and the touch module and the display module The central bonding area is attached to each other, and the touch module and the display module have a gap between the peripheral regions, and the gap is filled with a colloid layer.

In one embodiment, the method further includes an adhesive layer, wherein the touch module includes a bonding surface, the display module includes a display surface, and the adhesive layer is disposed on the sticker in the central bonding area. Between the face and the display surface.

In one embodiment, the adhesive layer completely covers the abutment surface of the central conformation zone.

In one of the embodiments, the gap is present between the abutting surface in the peripheral zone and the display surface, and the colloid layer is filled in the gap.

In one embodiment, further comprising a conductive line disposed on the peripheral region and disposed on the bonding surface, wherein the gap exists between the conductive line in the peripheral region and the display surface The colloid layer fills the gap and covers the conductive line.

In one embodiment, the method further includes a frame disposed on the display surface, the frame being convex relative to the display surface.

In one embodiment, the gap is present between the frame in the peripheral zone and the abutment surface, and the gel layer is filled in the gap.

In one embodiment, further comprising a conductive line disposed on the peripheral region and disposed on the bonding surface, wherein the gap exists between the conductive line and the frame, and the colloid layer is filled in The gap covers the conductive line.

In one embodiment, a gap is provided between the colloid layer and the adhesive layer or the colloid layer is disposed on the same horizontal plane in a spaced arrangement in the gap.

A method for manufacturing a touch screen, the improvement comprising the steps of: bonding a touch module and a display module to each other through an adhesive layer in a central bonding area of the touch screen; and in a peripheral area of the touch screen, Filling the colloid layer with a gap between the touch module and the display module, wherein the peripheral region is surrounding the central bonding region.

In one embodiment, the step of filling the colloid layer further includes disposing a baffle on the side of the touch module or the display module, and further including after the step of filling the colloid layer The step of removing the baffle.

In one embodiment, the touch module includes a bonding surface, and the display module includes a display surface, and the adhesive layer is formed on the bonding surface located in the central bonding area or in the central bonding area. The display surface is configured to fit the touch module and the display module.

In one embodiment, the adhesive layer completely covers the location The bonding surface of the central bonding area is described.

In one embodiment, the gap is present between the abutting surface in the peripheral zone and the display surface, filling the colloid layer in the gap.

In one embodiment, before the step of bonding, further comprising forming a conductive line on the bonding surface located in the peripheral region, wherein the gap exists between the conductive line and the display surface, Filling the colloid layer in the gap and covering the conductive line.

In one embodiment, before the step of bonding, further comprising forming a frame on the display surface of the peripheral area, the frame being convex relative to the display surface.

In one embodiment, the gap is present between the frame in the peripheral zone and the abutment surface, filling the colloid layer in the gap.

In one embodiment, before the step of bonding, further comprising forming a conductive line on the bonding surface located in the peripheral region, wherein the gap exists between the conductive line and the bezel, Filling the colloid layer in the gap and covering the conductive line.

In one embodiment, the colloid layer is filled by pneumatic dispensing, peristaltic dispensing or manual dispensing.

In one embodiment, a gap is provided between the colloid layer and the adhesive layer or the colloid layer is disposed on the same horizontal plane in a spaced arrangement in the gap.

In the above touch screen and the manufacturing method thereof, the display module is adhered to the touch module by using the adhesive layer, and the glue layer is filled in the gap between the touch module and the display module in the peripheral area, thereby ensuring the glue layer. When the edge of the touch module is pressed, the colloid layer is lifted For the corresponding supporting force, the display module is not deformed by the pressure, thereby eliminating the edge water ripple phenomenon.

10‧‧‧ touch screen

101‧‧‧Central Fit Area

102‧‧‧The surrounding area

103‧‧‧ gap

110‧‧‧Touch Module

112‧‧‧Fitting surface

114‧‧‧Electrical circuit

120‧‧‧ display module

122‧‧‧ display surface

124‧‧‧Border

130‧‧‧Adhesive layer

140‧‧‧colloid layer

S510‧‧‧Steps

S520‧‧‧Steps

S610‧‧‧Steps

S710‧‧‧Steps

S810‧‧‧Steps

1 is a schematic view showing the structure of a touch panel according to a first embodiment of the present invention.

Figure 2 is a block diagram showing the structure of a touch screen according to a second embodiment of the present invention.

Figure 3 is a block diagram showing the structure of a touch panel according to a third embodiment of the present invention.

Figure 4 is a block diagram showing the structure of a touch panel according to a fourth embodiment of the present invention.

Figure 5 is a flow chart showing the manner of making the touch screen of the first embodiment of the present invention.

Figure 6 is a flow chart showing the manner of making the touch screen of the second embodiment of the present invention.

Figure 7 is a flow chart showing the manner of making the touch screen of the third embodiment of the present invention.

Figure 8 is a flow chart showing the manner of making the touch screen of the fourth embodiment of the present invention.

As shown in FIG. 1, FIG. 1 is a schematic structural view of a touch panel according to a first embodiment of the present invention. The touch screen 10 defines a central bonding area 101 and a peripheral area 102. The peripheral area 102 surrounds the central bonding area 101. The touch screen 10 includes a touch module 110 and a display module 120, and the touch module 110 and the display module The group 120 is adhered to each other in the central bonding area 101. The touch module 110 and the display module 120 have a gap 103 between the peripheral regions 102, and the gap 103 is filled with the colloid layer 140. The colloid layer 140 provides a corresponding supporting force when the edge of the touch module 110 is pressed, so that the display module 120 is not deformed by the pressure, thereby eliminating the edge water ripple phenomenon. At the same time, the unevenness of the force between the touch module 110 and the display module 120 is caused when the edge of the touch module 110 is pressed, and the service life of the touch screen is prolonged.

The touch panel 10 includes a bonding surface 112. The display module 120 includes a display surface 122. The adhesive layer 130 is disposed between the bonding surface 112 and the display surface 122. The gap 103 is located between the bonding surface 112 and the display surface 122 in the peripheral region 102, and the gap 103 is filled with the colloid layer 140.

As shown in Fig. 2, Fig. 2 shows a second embodiment of the present invention. The difference between the present embodiment and the first embodiment is that the touch module 110 further includes a bare conductive line 114. The conductive line 114 is disposed on the bonding surface 112 of the peripheral region 102, and the increase of the conductive line 114 is correspondingly changed. The position of the gap 103 is different from that of the first embodiment. In the present embodiment, the gap 104 is used. The gap 104 exists between the conductive line 114 and the display surface 122 of the peripheral area 102, and the colloid layer 140 is filled in the gap 104. The conductive line 114 is covered and covered. The colloid layer 140 covers the conductive traces 114 to ensure that the conductive traces 114 are not functionally damaged by electrostatic damage during fabrication or use.

As shown in Fig. 3, Fig. 3 shows a third embodiment of the present invention. The difference between the embodiment and the first embodiment is that the display module 120 further includes a frame 124. The frame 124 is disposed on the display surface of the peripheral area 102. The frame 124 is convex relative to the display surface 122, and the increase of the frame 124 is correspondingly changed. The position of the gap 103 is different from that of the first embodiment. In the present embodiment, the gap 105 is used. The gap 105 is present between the frame 124 and the bonding surface 112 in the peripheral region 102, and the colloid layer 140 is filled in the gap 105. in.

As shown in Fig. 4, Fig. 4 shows a fourth embodiment of the present invention. The difference between the embodiment and the third embodiment is that the touch module 110 further includes a conductive line 114. The conductive line 114 is disposed on the bonding surface 112 of the peripheral area 102. The increase of the conductive line 114 changes the gap. 105 position, which is different from the third implementation For example, in the present embodiment, the gap 106 is used to indicate that the gap 106 exists between the frame 124 and the conductive line 114, and the colloid layer 140 is filled in the gap 106 and covers the conductive line 114. The colloid layer 140 covers the conductive traces 114 to ensure that the conductive traces 114 are not functionally damaged by electrostatic damage during fabrication or use.

In the above embodiment, the touch module 110 can be a capacitive touch module or a resistive touch module, but is not limited thereto. The touch module 110 can be a single glass solution, or a glass to glass, or a film sensor bonded to a cover glass. structure. The touch module 110 can be used by a user to select an action to be performed according to a function option displayed on the display module 120 with a finger or a stylus.

In the above embodiment, the adhesive layer 130 may be an Optical Clear Adhesive (OCA), and the bonding layer may be completely covered by the adhesive layer 130 to cover the central bonding area 101, that is, in the center. The bonding surface 112 of the bonding area 101 or the display surface 122 of the center bonding area 101 is provided with a whole surface optical glue, and the two are bonded together. The bonding method can make the touch module 110 and the display module 120 adhere more firmly and not fall off. Of course, in other embodiments, the partial bonding may be selected, that is, the adhesive layer 130 does not completely cover the bonding surface 112 located in the central bonding area 101 or the display surface 122 located in the central bonding area 101.

In the above embodiment, the colloid layer 140 may be a Liquid Optical Clear Adhesive (LOCA), and the filling method may be a pneumatic dispensing or a peristaltic dispensing using a dispenser, or a manual point. gum. The colloid layer 140 can completely fill the gap to further ensure that the display module 120 is not deformed by pressing when the edge of the touch module 110 is pressed. Of course, in other embodiments, A gap may be disposed between the colloid layer 140 and the adhesive layer 130. The colloid layer 140 may also be disposed on the same horizontal plane in a gap arrangement in the gap, that is, the colloid layer 140 includes a plurality of colloids, and the plurality of colloids are spaced apart from each other. Located on the same level.

As shown in FIG. 1 and FIG. 5, FIG. 5 is a view showing an embodiment of a method for manufacturing a touch panel according to a first embodiment of the present invention, including the following steps:

Step S510: In the central bonding area 101 of the touch screen 10, the touch module 110 and the display module 120 are attached to each other through the adhesive layer 130. The bonding of the touch module 110 and the display module 120 is performed by forming the adhesive layer 130 on the bonding surface 112 of the central bonding area 101 or the display surface 122 of the central bonding area 101, and then performing the pairing Position fit.

Step S520: In the peripheral area 102 of the touch screen 10, the glue layer 140 is filled in the gap 103 between the touch module 110 and the display module 120, wherein the peripheral area 102 surrounds the central bonding area 101. As shown in FIG. 1, a gap 103 exists between the bonding surface 112 and the display surface 122 in the peripheral region 102, and the colloid layer 140 is filled in the gap 103.

As shown in FIG. 2 and FIG. 6 , FIG. 6 shows an embodiment of a method for manufacturing a touch panel according to a second embodiment of the present invention, and a method for manufacturing the touch panel according to the first embodiment of the present invention. The difference between the embodiments is that, before the step S510, the method further includes a step S610, forming a conductive line 114 on the touch module 110, that is, the conductive line 114 can be formed on the bonding surface 112 of the peripheral area 102, and the manner of forming can be formed. For sputtering or lithography etching. Due to the addition of the conductive traces 114, a gap 104 exists between the conductive traces 114 and the display surface 122 of the peripheral region 102, and the colloid layer 140 fills the gaps 104 and covers the conductive traces 114. The colloid layer 140 covers the conductive line 114 to ensure that the conductive line 114 does not cause damage due to electrostatic damage during fabrication or use. damage.

As shown in FIG. 3 and FIG. 7, FIG. 7 shows an embodiment of a method for manufacturing a touch panel according to a third embodiment of the present invention. The difference between this embodiment and the method embodiment of the first embodiment is that Before step S510, a step S710 is further included, and a frame 124 is formed on the display surface 122 of the display area 120 on the display surface 122 of the peripheral area 102, and the frame 124 is convex relative to the display surface 122.

As shown in FIG. 4 and FIG. 8 , FIG. 8 shows an embodiment of a method for manufacturing a touch panel according to a fourth embodiment of the present invention. The difference between this embodiment and the method embodiment of the third embodiment is that Before step S710, a step S810 is further included to form a conductive line 114 on the touch module 110. The conductive line 114 is formed on the bonding surface 112 of the peripheral region 102, and may be formed by sputtering or lithography. Due to the addition of the conductive traces 114, a gap 104 exists between the conductive traces 114 and the display surface 122 of the peripheral region 102, and the colloid layer 140 fills the gaps 104 and covers the conductive traces 114. The colloid layer 140 covers the conductive traces 114 to ensure that the conductive traces 114 are not functionally damaged by electrostatic damage during fabrication or use. Since the conductive line 114 and the frame 124 are respectively formed on the touch module 110 and the display module 120, there is no inevitable sequence requirement between the two, so step S810 can also be completed after step S710 or independently.

In the foregoing method embodiments, in order to ensure that the colloid layer 140 can be smoothly filled into the gap, before the step S520, the deflector can be disposed on one side of the display module or the touch module to guide the colloid to the gap. After step S520, the baffle is removed, and the baffle may be a polyester film.

In the above method embodiment, the touch module 110 can be used by the user to select the desired function according to the function options displayed on the display module 120 by using a finger or a stylus. The action of the line. The touch module 110 can be a capacitive touch module or a resistive touch module, but is not limited thereto. The capacitive touch module can adopt a single-chip glass scheme, or a two-layer glass structure, or a structure in which a thin film capacitor inductor and a protective glass are bonded together.

In the above method embodiment, the adhesive layer 130 may be an optical adhesive layer, and the bonding method may be completely covered by the adhesive layer 130 to completely cover the central bonding area 101, that is, the sticker located in the central bonding area 101. The surface 112 or the display surface 122 of the central bonding area 101 is provided with a full surface optical glue to bond the two. The bonding method can make the touch module 110 and the display module 120 adhere more firmly and not fall off. Of course, in other embodiments, the partial bonding may be selected, that is, the adhesive layer 130 does not completely cover the bonding surface 112 located in the central bonding area 101 or the display surface 122 located in the central bonding area 101.

In the above method embodiment, the colloid layer 140 may select a liquid optical adhesive layer, and the filling method may be a pneumatic dispensing or a peristaltic dispensing using a dispenser, and of course, manual dispensing may also be used. The colloid layer 140 can completely fill the gap to further ensure that the display module 120 is not deformed by pressing when the edge of the touch module 110 is pressed. In other embodiments, a gap may be disposed between the colloid layer 140 and the adhesive layer 130. The colloid layer 140 may also be disposed on the same horizontal plane in a gap arrangement, that is, the colloid layer 140 includes a plurality of colloids. The colloids are spaced apart from one another and on the same level.

After the touch panel 110 and the display module 120 are bonded together by the adhesive layer 130, the glue layer 140 is filled in the gap to ensure that the edge of the touch module 110 is pressed when the glue layer 140 is pressed. The supporting force of the display module 120 is not deformed by the pressure, and the edge water ripple phenomenon is eliminated. At the same time reduce the pressing on the touch module The effect of the bonding effect between the display module 120 and the display module 120 prevents the unevenness of the force between the touch module 110 and the display module 120 when the edge of the touch module 110 is pressed, thereby prolonging the service life of the touch screen.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the claims of the present invention; any equivalent changes or modifications made without departing from the spirit of the invention should be included in the following Within the scope of the patent application.

10‧‧‧ touch screen

101‧‧‧Central Fit Area

102‧‧‧The surrounding area

103‧‧‧ gap

110‧‧‧Touch Module

112‧‧‧Fitting surface

120‧‧‧ display module

122‧‧‧ display surface

130‧‧‧Adhesive layer

140‧‧‧colloid layer

Claims (20)

A touch screen includes a central bonding area and a peripheral area surrounding the central bonding area, the touch screen includes a touch module and a display module, and the touch module and the display module The central bonding area is attached to each other, and the touch module and the display module have a gap between the peripheral regions, and the gap is filled with a colloid layer. The touch screen of claim 1, further comprising an adhesive layer, wherein the touch module comprises a bonding surface, the display module comprises a display surface, and the adhesive layer is attached to the center The joint area is disposed between the bonding surface and the display surface. The touch screen of claim 2, wherein the adhesive layer completely covers a bonding surface located in the central bonding area. The touch screen of claim 2, wherein the gap is present between the bonding surface in the peripheral region and the display surface, and the colloid layer is filled in the gap. The touch panel of claim 2, further comprising a conductive line disposed on the peripheral area and disposed on the bonding surface, wherein the gap exists in the peripheral area Between the conductive line and the display surface, the colloid layer fills the gap and covers the conductive line. The touch panel of claim 2, wherein the display module further comprises a frame disposed on the peripheral area and disposed on the display surface, the frame being convex relative to the display surface. The touch screen of claim 6, wherein the gap exists in Between the frame in the peripheral zone and the bonding surface, the colloid layer is filled in the gap. The touch screen of claim 6, wherein the touch module further comprises a conductive line disposed on the peripheral area and disposed on the bonding surface, wherein the gap exists in the conductive Between the line and the bezel, the colloid layer fills the gap and covers the conductive line. The touch screen of claim 1, wherein a gap is formed between the colloid layer and the adhesive layer or the colloid layer is disposed on the same horizontal plane in a spaced arrangement in the gap. A method for manufacturing a touch screen, the improvement comprising the steps of: bonding a touch module and a display module to each other through an adhesive layer in a central bonding area of the touch screen; and in a peripheral area of the touch screen, Filling the colloid layer with a gap between the touch module and the display module, wherein the peripheral region is surrounding the central bonding region. The touch panel manufacturing method of claim 10, further comprising: before the step of filling the colloid layer, further comprising providing a baffle on the side of the touch module or the display module, in filling The step of the colloid layer further includes the step of removing the baffle. The touch panel manufacturing method of claim 10, wherein the touch module comprises a bonding surface, the display module includes a display surface, and the adhesive layer is formed on the sticker in the central bonding area. The face or the display surface located in the central fit area The touch module and the display module are attached to each other. The method of manufacturing a touch screen according to claim 12, wherein the adhesive layer completely covers the bonding surface located in the central bonding area. The touch panel manufacturing method of claim 12, wherein the gap exists between the bonding surface in the peripheral region and the display surface, and the colloid layer is filled in the gap. The touch panel manufacturing method of claim 12, further comprising forming a conductive line on the bonding surface located in the peripheral area before the bonding step, wherein the gap exists in the conductive line Between the display surface, the colloid layer is filled in the gap and covers the conductive line. The touch panel manufacturing method of claim 12, further comprising forming a frame on the display surface of the peripheral area before the bonding step, the frame being convex relative to the display surface Start. The touch screen manufacturing method of claim 16, wherein the gap exists between the frame in the peripheral zone and the bonding surface, and the glue layer is filled in the gap. The touch panel manufacturing method of claim 16, wherein the step of bonding further comprises forming a conductive line on the bonding surface located in the peripheral area, wherein the gap exists in the Between the conductive line and the frame, the colloid layer is filled in the gap and covers the conductive line. The method for manufacturing a touch screen according to claim 10, wherein the filling method of the colloid layer is pneumatic dispensing, peristaltic dispensing or manual dispensing. The method for manufacturing a touch panel according to claim 10, wherein a gap is formed between the colloid layer and the adhesive layer, or the colloid layer is disposed at a same level in the gap in the gap. on.