TWI639936B - Touch module and touch display device with narrow border - Google Patents

Abstract

In the touch display device and the touch module of the present invention, an opaque shielding layer is added to the touch module, and its inner boundary is located in the touch area or extends in the printed area, so that it is under a normal viewing angle. , The user will not see the traces in the lead area of the touch module in the display area. Therefore, when designing a touch module, there is no need to reserve a gap between the touch area and the ink printing area due to manufacturing or assembly tolerances, so the width of the borders on both sides of the touch module can be effectively reduced.

Description

Narrow frame design touch module and touch display device

The invention relates to a touch control structure, in particular to a touch module with a narrow frame design.

In recent years, with the advancement of technology and the increasing development of the electronics industry, the use of electronic devices such as smart phones and tablets has become more and more common, and has developed in the direction of convenient, versatile and beautiful designs. . With the evolution of functions, most devices have the function of touch control, and the narrow frame design is the goal of various developers. In all current touch panel technologies, the Glass-film-film (GFF) stack is a widely used architecture. In this architecture, due to the consideration of manufacturing tolerances, it is generally necessary to retain the touch active area and the ink printing area. A clearance of at least 0.3 mm, that is to say, a 0.3 mm area must be reserved in the frame printing area of the cover glass (CG), to avoid the tolerance of the attachment causing the touch panel traces to be seen in the display area. However, because these gaps are retained, the frame of the current touch panel cannot be further reduced.

In order to further reduce the screen frame of a touch module or a touch display device, the present invention proposes a touch module architecture with a narrow frame design.

One embodiment of the present invention provides a touch module with a narrow frame design, which is disposed on a display module. The touch module includes a first sensing layer, a second sensing layer, and a first optical adhesion. Layer, a protective glass, a second optical adhesive layer, and a shielding layer. The first sensing layer has a first surface and a second surface, and a first wire region of the first sensing layer is located on the second surface. The second sensing layer has a third surface and a fourth surface. A second wire region of the second sensing layer is located on the third surface. An inner boundary of the first wire region and the second wire region is defined. The touch area of the touch module. The first optical adhesive layer is disposed between the second surface of the first sensing layer and the third surface of the second sensing layer to adhere the first sensing layer and the second sensing layer. The protective glass has an ink layer, and a width of the ink layer in a lateral direction defines a frame width of the touch module, and an inner boundary of the first lead region and the second lead region and an inner border of the ink layer. There is an interval in this lateral direction. The second optical adhesive layer is disposed between the fourth surface of the second sensing layer and the protective glass to adhere the second sensing layer and the protective glass. The shielding layer is disposed on the fourth surface of the second sensing layer, and an inner boundary of the shielding layer along the lateral direction falls within a touch area of the touch module.

Another embodiment of the present invention provides a touch display device with a narrow frame design. The touch display device includes a display module and a touch module. The touch module is disposed on the display module. The touch module includes a first sensing layer, a second sensing layer, a first optical adhesive layer, a protective glass, a second optical adhesive layer and a Masking layer. The first sensing layer has a first surface and a second surface, and a first wire region of the first sensing layer is located on the second surface. The second sensing layer has a third surface and a fourth surface. A second wire region of the second sensing layer is located on the third surface. An inner boundary of the first wire region and the second wire region is defined. The touch area of the touch module. The first optical adhesive layer is disposed between the second surface of the first sensing layer and the third surface of the second sensing layer to adhere the first sensing layer and the second sensing layer. The protective glass has an ink layer, and a width of the ink layer in a lateral direction defines a frame width of the touch module, and an inner boundary of the first lead region and the second lead region and an inner border of the ink layer. There is an interval in this lateral direction. The second optical adhesive layer is disposed between the fourth surface of the second sensing layer and the protective glass to adhere the second sensing layer and the protective glass. The shielding layer is disposed on the fourth surface of the second sensing layer, and an inner boundary of the shielding layer along the lateral direction falls within a touch area of the touch module.

In the embodiment of the present invention, the shielding layer is an opaque ink layer or a black ink layer.

In an embodiment of the present invention, the shielding layer is the same color as the ink layer of the display module or the cover glass that is not lit.

In an embodiment of the present invention, an inner boundary of the shielding layer and an inner boundary of the ink layer of the cover glass are flush with each other in the lateral direction.

In an embodiment of the present invention, the interval is not greater than 0.1 mm.

In an embodiment of the present invention, an inner boundary of the ink layer of the protective glass defines a printed inner area of the touch module, and an inner boundary of the shielding layer along the lateral direction falls on the touch module. Within the printed area.

In an embodiment of the present invention, the interval is greater than or equal to 0 mm and not greater than 0.1 mm.

By adding an opaque shielding layer to the touch module, the user will not see the traces of the lead area of the touch module in the display area at a specific angle. When designing the touch module, there is no need to reserve the gap between the touch active area and the ink printing area due to manufacturing or assembly tolerances, so the width of the border on both sides of the touch module can be effectively reduced.

Certain terms are used in the description and the scope of subsequent patent applications to refer to specific elements. Those with ordinary knowledge in the field should understand that manufacturers may use different terms to refer to the same component. The scope of this specification and subsequent patent applications does not take the difference in names as a way to distinguish components, but rather uses the difference in functions of components as a criterion for distinguishing components. "Inclusion" mentioned throughout the specification and subsequent claims is an open-ended term and should be interpreted as "including but not limited to." In addition, the term "coupled" or "connected" includes any direct and indirect means of electrical or structural connection. Therefore, if a first device is described as being coupled / connected to a second device, it means that the first device can be electrically / structured directly connected to the second device, or indirectly electrically / structured through other devices or connection means. To the second device.

Please refer to FIG. 1 and FIG. 2. FIG. 1 is a schematic partial cross-sectional view of each layer of a touch module of a first embodiment of a touch display device with a narrow bezel design according to the present invention. FIG. 2 is FIG. A schematic partial cross-sectional view of the combination of the layers of the touch module in the first embodiment. The touch display device 300 includes a touch module 100 and a display module 200. The touch module 100 with a narrow frame design is disposed on the display module 200. The touch module 100 includes a first sensing layer 1, a second sensing layer 2, and a protective glass 4. The first sensing layer 1 has a first surface 11 and a second surface 12. The first wire region 5 in the touch module 100 is located on the second surface 12 of the first sensing layer 1. The second sensing layer 2 has a third surface 21 and a fourth surface 22. The second conductive line area 6 in the touch group 100 is located on the third surface 21, and the inner boundary of the first conductive line area 5 and the second conductive line area 6 is located on the third surface 21. That is, the touch area TA of the touch module 100 is defined. The protective glass 4 is located at the outermost side of the touch module 100, that is, the element directly contacted by the user. It has an ink layer 41. The inner boundary of the ink layer 41 defines the printed inner area PA of the touch module 100. As for the ink layer 41, The width along the lateral direction L1L2 defines the width of the frame area BA of the touch module 100, and the width of the frame area BA can be further reduced in the present invention.

The touch module 100 is adhered to the above layers with an optical adhesive (OCA, Optical Clear Adhesive). For example, the first optical adhesive layer 7 is disposed between the second surface 12 of the first sensing layer 1 and the third surface 21 of the second sensing layer 2 to adhere the first sensing layer 1 and the second sensing layer 2. The second optical adhesive layer 8 is disposed between the fourth surface 22 of the second sensing layer 2 and the protective glass 4 to adhere the second sensing layer 2 and the protective glass 4. As described above, the inner boundary of the first wire area 5 and the second wire area 6 defines a touch area TA, that is, a touch active area, and the metal traces of the touch module 100 are distributed outside the touch area TA, and It is covered by the opaque ink layer 41 to prevent users from seeing the metal traces of the touch module 100 in the display area. It can be seen from FIG. 1 that the inner boundary of the first lead region 5 and the second lead region 6 and the inner boundary of the ink layer 41 are separated by a gap G in the lateral direction L1L2. In order to effectively reduce the gap G, it is necessary to avoid attachment. Tolerances cause the metal traces of the touch module 100 to be seen in the display area. On the fourth surface 22 of the second sensing layer 2, a shielding layer 3 is additionally provided, which is an opaque ink layer or a black ink layer. In an embodiment of the invention, the shielding layer 3 may also be the same color as the unlit display module 200 or the ink layer 41 of the protective glass 4, and the inner layer of the shielding layer 3 along the lateral direction L1L2 falls on the touch module. In the touch area TA of 100, that is, the shielding layer 3 is located between the ink layer 41 and the first and second lead areas 5 and 6, and the inner boundary thereof is greater than that of the first and second lead areas 5 and 6. The inner boundary of the first wire area extends more inwardly (or its width in the lateral direction L1L2 is greater than the width of the first wire area 5 and the second wire area 6), so from the perspective of the user, the first wire area 5 And the metal line of the second lead region 6 will be hidden by the shielding layer 3 and not be detected. Thereby significantly reducing the width of the gap G is reserved, in order to achieve the narrow frame design.

In the first embodiment of FIGS. 1 and 2, the inner boundary of the shielding layer 3 is flush with the inner boundary of the ink layer 41 of the cover glass 4 in the lateral direction L1L2. In such a configuration, the lead area The interval G between the boundary and the inner boundary of the ink layer can be reduced to a level not larger than 0.1 mm. Please refer to FIG. 3 and FIG. 4. FIG. 3 is a schematic partial cross-sectional view of a touch module of a second embodiment of a touch display device with a narrow bezel design according to the present invention, with each layer separated, and FIG. 4 is a view of FIG. 3. A partial cross-sectional view of the combination of the layers of the touch module in the second embodiment. In the touch display device 400 of the second embodiment, the inner boundary of the shielding layer 3 of the touch module 100 'in the lateral direction L1L2 extends inwardly and falls within the printed inner area PA of the touch module 100', and Under such a configuration, the gap G between the boundary in the lead region and the inner boundary of the ink layer 41 can be further reduced to a degree greater than or equal to 0 mm and not greater than 0.1 mm, that is, the width of the border area BA can be made substantially equivalent. The width of the conductive line area does not need to reserve a gap G between the two, and the shielding layer 3 is sufficient to cover the metal lines of the first conductive line area 5 and the second conductive line area 6 from being detected. Under the configurations of the above two embodiments, the touch display device or touch module of the present invention can effectively reduce the width of the frame.

In the touch display device and the touch module of the present invention, by adding an opaque shielding layer to the touch module, the user will not see the lead area of the touch module in the display area at a specific angle. Routing. When designing the touch module, there is no need to reserve the gap between the touch area and the ink printing area due to manufacturing or assembly tolerances, so the width of the borders on both sides of the touch module can be effectively reduced. The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall fall within the scope of the present invention.

1‧‧‧ the first induction layer

2‧‧‧Second Induction Layer

3‧‧‧ masking layer

4‧‧‧ protective glass

5‧‧‧The first wire area

6‧‧‧Second conductor area

7‧‧‧first optical adhesive layer

8‧‧‧Second Optical Adhesive Layer

11‧‧‧ the first side

12‧‧‧ second side

21‧‧‧ the third side

22‧‧‧ Fourth side

41‧‧‧Ink layer

100,100'‧‧‧touch module

200‧‧‧Display Module

300,400‧‧‧Touch display device

TA‧‧‧Touch Area

PA‧‧‧Printing area

DA‧‧‧ Display Area

BA‧‧‧Border area

G‧‧‧ interval

L1L2‧‧‧lateral direction

FIG. 1 is a schematic partial cross-sectional view of each layer of a touch module of a first embodiment of a touch display device with a narrow frame design according to the present invention. FIG. 2 is a schematic partial cross-sectional view illustrating the combination of the layers of the touch module in the first embodiment of FIG. 1. FIG. FIG. 3 is a schematic partial cross-sectional view of each layer of a touch module of a second embodiment of a touch display device with a narrow bezel design according to the present invention. FIG. 4 is a schematic partial cross-sectional view of combining layers of the touch module in the second embodiment of FIG. 3.

Claims (8)

A touch module with a narrow frame design is disposed on a display module. The touch module includes: a first sensing layer having a first surface and a second surface. A first wire region is located on the second surface; a second sensing layer has a third surface and a fourth surface, and a second wire region of the second sensing layer is located on the third surface, the first wire The inner boundary of the area and the second wire area define the touch area of the touch module; a first optical adhesive layer is disposed on the second surface of the first sensing layer and the first sensing layer. Between the three sides, the first sensing layer and the second sensing layer are adhered; a protective glass has an ink layer, and an inner boundary of the ink layer defines a printing inner area of the touch module, and the ink layer is along The width in the lateral direction defines the width of the frame of the touch module, and the inner boundary of the first lead region and the second lead region is separated from the inner boundary of the ink layer by a distance in the lateral direction; a second An optical adhesive layer is disposed on the fourth surface of the second sensing layer and the protective glass Between the second sensing layer and the protective glass; and a shielding layer disposed on the fourth surface of the second sensing layer, the shielding layer falling on the touch panel along the inner boundary of the lateral direction In the printed area of the module, the width of the frame of the touch module is substantially equivalent to the width of the first lead region and the second lead region. The touch module according to claim 1, wherein the shielding layer is an opaque ink layer or a black ink layer. The touch module according to claim 1, wherein the shielding layer is the same color as the display module or the ink layer of the cover glass that is not lit. The touch module according to claim 1, wherein the interval is greater than or equal to 0 mm and not greater than 0.1 mm. A touch display device with a narrow bezel design. The touch display device includes: a display module; and a touch module disposed on the display module. The touch module includes: a first sensor Layer, having a first side and a second side, a first wire region of the first sensing layer is located on the second side; a second sensing layer having a third side and a fourth side, the first A second wire region of the two sensing layers is located on the third surface, and the inner boundary of the first wire region and the second wire region defines a touch region of the touch module; a first optical adhesive layer is provided; Between the second surface of the first sensing layer and the third surface of the second sensing layer, the first sensing layer and the second sensing layer are adhered; a protective glass having an ink layer, the ink The inner boundary of the layer defines the printed inner area of the touch module, and the width of the ink layer along the lateral direction defines the width of the frame of the touch module. The inner area of the first wire area and the second wire area The boundary is separated from the inner boundary of the ink layer by a distance in the lateral direction; a first An optical adhesive layer is disposed between the fourth surface of the second sensing layer and the protective glass to adhere the second sensing layer and the protective glass; and a shielding layer is disposed on the first sensing layer. On four sides, the inner boundary of the shielding layer along the lateral direction falls within the printed inner area of the touch module, and the width of the frame of the touch module is substantially equivalent to the first wire area and the second wire. The width of the zone. The touch display device according to claim 5, wherein the shielding layer is an opaque ink layer or a black ink layer. The touch display device according to claim 5, wherein the shielding layer is the same color as the ink layer of the display module or the cover glass that is not lit. The touch display device according to claim 5, wherein the interval is greater than or equal to 0 mm and not greater than 0.1 mm.