TWM497811U - Panel structure - Google Patents

Abstract

A panel structure including a panel, pads, a flexible circuit board, a conductive adhesive, and a reinforced adhesive layer is provided. The panel has a peripheral circuit area. The pads are located in the peripheral circuit area. The flexible circuit board includes a flexible substrate and output terminals, wherein the flexible substrate has an output end and an input end. The output terminals are disposed on the output end. The conductive adhesive is disposed between the output end having the output terminals and the peripheral circuit area having the pads, wherein each of the output terminals is aligned with the corresponding pad and is electrically connected to the corresponding pad through the conductive adhesive. The reinforced adhesive layer is connected to the output end having the output terminals and the peripheral circuit area having the pads respectively, and the reinforced adhesive is covered by the conductive adhesive.

Description

Panel structure

The novel creation relates to a panel structure, and in particular to a panel structure with good reliability.

In the prior art, the electrical connection between the flexible circuit board and the touch panel (or the display panel) is generally performed by first providing a plurality of terminals or a touch panel on the flexible circuit board (or The area on which the plurality of pads are disposed on the display panel is coated with an anisotropic conductive film (ACF). Then, the respective terminals and the corresponding pads are aligned with each other, and the anisotropic conductive adhesive is respectively bonded to the area where the terminals are provided on the flexible circuit board and the pads are disposed on the touch panel (or the display panel). Area. Thereafter, the area where the terminals are disposed on the flexible circuit board and the area where the pads are disposed on the touch panel (or the display panel) are electrically connected to the respective terminals by the conductive particles of the anisotropic conductive adhesive. And corresponding pads, so that the flexible circuit board and the touch panel (or display panel) are electrically connected to each other.

The combined flexible circuit board and touch panel (or display panel) can be further applied to subsequent assembly operations, for example, by a flexible circuit board. Flexible to bend the movable end of the flexible circuit board (ie, the end of the area on which the terminals are provided on the flexible circuit board) to the side of the printed circuit board, making it flexible The active ends of the boards are electrically connected to the printed circuit board and electrically connected to each other. However, the stress generated when the flexible circuit board is bent may be concentrated on the joint area between the flexible circuit board and the touch panel (or the display panel), and the flexible circuit board self-touch panel is likely to occur. (or display panel) Peelin case.

The novel creation provides a panel structure with a better bonding strength between the flexible circuit board and the panel.

The novel creation proposes a panel structure comprising a panel, a plurality of pads, a flexible circuit board, a conductive adhesive and a reinforced adhesive layer. The panel has a perimeter line area. The pads are located in the peripheral circuit region. The flexible circuit board comprises a flexible substrate and a plurality of output terminals, wherein the flexible substrate has opposite output ends and input terminals, and the output terminals are disposed at the output end. The conductive paste is disposed between the output end having the output terminals and the peripheral line region having the pads, wherein each of the output terminals is aligned with the corresponding pad and electrically connected to the corresponding pad through the conductive paste. The reinforced adhesive layer respectively engages the output terminals having the output terminals and the peripheral wiring regions having the pads, and is covered by the conductive paste.

In an embodiment of the present invention, the pads are arranged side by side in the peripheral circuit area, and the arrangement direction of the pads is parallel to one side edge of the panel.

In an embodiment of the novel creation, the output terminals are arranged side by side. At the output end, the arrangement direction of the output terminals is parallel to the arrangement direction of the pads.

In an embodiment of the present invention, the distance between any two adjacent output terminals is equal.

In an embodiment of the present invention, the distance between any two adjacent pads is equal.

In an embodiment of the novel creation, the output terminal partially covers the peripheral line region to define a junction region. These pads, these output terminals, conductive paste, and the adhesive layer are located within the joint region.

In an embodiment of the present invention, the reinforced adhesive layer is located on at least one of the pads and the output terminals.

In an embodiment of the present invention, the reinforced adhesive layer is located between the pads and the side edges of the panel.

In an embodiment of the present invention, the reinforced adhesive layer surrounds the pads and the output terminals.

In an embodiment of the present invention, the above-mentioned reinforcing rubber layer is in the form of a strip, a block or a U-shape.

In an embodiment of the present invention, the length of the reinforcing layer is greater than or equal to the length of the output terminals on the output end, or the length of the pads on the peripheral line area.

In an embodiment of the present invention, the flexible circuit board further includes at least one input terminal disposed at the input end. Input is suitable for assembly to printed circuits The board is configured to electrically connect the flexible circuit board to the printed circuit board through the input terminal.

In an embodiment of the present invention, the reinforced adhesive layer comprises an optical adhesive, a photo-curable adhesive or a double-sided adhesive.

In an embodiment of the present invention, the conductive paste is an anisotropic conductive paste.

Based on the above, the panel structure of the present invention can be configured to provide a reinforced adhesive layer between the flexible circuit board and the panel (for example, a touch panel or a display panel) to improve the relationship between the flexible circuit board and the panel. Bond strength.

. The above described features and advantages of the present invention will become more apparent and understood from the following description.

100, 100A~100E‧‧‧ panel structure

101‧‧‧ junction area

110‧‧‧ panel

110s‧‧‧lateral edge

111‧‧‧ touch area

112‧‧‧ Peripheral area

120‧‧‧ pads

130‧‧‧Flexible circuit board

131‧‧‧Flexible substrate

131a‧‧‧output

131b‧‧‧ input

132‧‧‧Output terminal

133‧‧‧Input terminal

140‧‧‧Conductive adhesive

150, 150a~150e‧‧‧ Strengthening adhesive layer

200‧‧‧Printed circuit board

D‧‧‧Orientation

1 is a partial top plan view of a panel structure of an embodiment of the present invention.

2 is a partial cross-sectional view of the panel structure of FIG. 1 taken along line I-I.

3 is a schematic view of the flexible circuit board of FIG. 2 assembled with a printed circuit board.

4 is a partial top plan view of a panel structure of another embodiment of the present invention.

FIG. 5 is a partial top plan view of a panel structure of another embodiment of the present invention.

6 is a partial top plan view of a panel structure of another embodiment of the present invention.

7 is a partial top plan view of a panel structure of another embodiment of the present invention.

8 is a partial top plan view of a panel structure of another embodiment of the present invention.

1 is a partial top plan view of a panel structure of an embodiment of the present invention. 2 is a partial cross-sectional view of the panel structure of FIG. 1 taken along line I-I. Referring to FIG. 1 and FIG. 2 , in the embodiment, the panel structure 100 is, for example, a touch panel structure or a display panel structure, wherein the panel structure 100 may include a panel 110 , a plurality of pads 120 , and a flexible circuit board 130 . Conductive adhesive 140 and reinforcing adhesive layer 150.

For example, the touch panel structure can be divided into a touch area 111 and a peripheral line area 112. The touch area 111 is adapted to receive a touch event occurring on the panel 110 to enable the touch panel structure to be applied. The touch display device or the electronic device performs a corresponding action. Specifically, the touch area 111 is provided with a plurality of electrode patterns (not shown) and fan-out wires (not shown) electrically connected to the electrode patterns, and the fan-out wires (not shown) extend to the periphery. The line region 112 is electrically connected to the pads 120 located in the peripheral line region 112.

The flexible circuit board 130 is, for example, a flexible flat cable (FFC) or a flexible printed circuit (FPC). Here, although a single flexible circuit board 130 disposed on one side of the panel 110 is exemplified, the number of the flexible circuit boards 130 is not limit. In other words, in other embodiments, a plurality of flexible circuit boards 130 may be simultaneously disposed on the same side or different sides of the panel 110, and may be modulated according to actual design requirements.

Generally, the flexible circuit board 130 includes a flexible substrate 131 and a plurality of output terminals 132, wherein the flexible substrate 131 has opposite output ends 131a and input ends 131b, and the output terminals 132 are disposed on the output End 131a. In order to achieve the electrical connection between the flexible circuit board 130 and the panel 110, the conductive paste 140, such as an anisotropic conductive paste, is first disposed on the output end 131a having the output terminals 132 and has these pads. Between the peripheral line areas 112 of 120. Thereafter, the respective output terminals 132 and the corresponding pads 120 are aligned with each other, and the output terminals 131a having the output terminals 132 and the peripheral wiring regions 112 having the pads 120 are pressed to conduct conductive particles by the conductive paste 140. Each of the output terminals 132 and the corresponding pads 120 are electrically connected to electrically connect the flexible circuit board 130 and the panel 110 to each other. At this time, the output end 131a partially covers the peripheral line region 112 to define the bonding region 101, wherein the pad 120, the output terminal 132, the conductive adhesive 140, and the reinforcing adhesive layer 150 are all located in the bonding region 101.

In detail, the reinforcing adhesive layer 150 respectively engages the output end 131a having the output terminals 132 and the peripheral wiring region 112 having the pads 120, and is covered by the conductive paste 140. In other words, the reinforcing adhesive layer 150 is, for example, before the output end 131a having the output terminals 132 and the peripheral wiring region 112 having the pads 120 are pressed (that is, the conductive paste 140 is applied to the output end 131a having the output terminals 132). Or before the peripheral line region 112 having the pads 120, it is formed at the output end 131a having the output terminals 132 or the periphery having the pads 120 On the line area 112. Thereby, when the output end 131a having the output terminals 132 and the peripheral line region 112 having the pads 120 are press-fitted to electrically connect the respective output terminals 132 and the corresponding pads 120 through the conductive adhesive 140, the reinforced adhesive can be ensured. The layer 150 is bonded to the output end 131a having the output terminals 132 and the peripheral line region 112 having the pads 120, respectively, to improve the bonding strength between the flexible circuit board 130 and the panel 110.

In the present embodiment, the pads 120 are juxtaposed in the peripheral line region 112, and the arrangement direction D of the pads 120 is parallel to the side edges 110s of the panel 110. Similarly, the output terminals 132 are juxtaposed on the output end 131a, and the arrangement direction of the output terminals 132 is parallel to the arrangement direction 132 of the pads 120. In other words, the layout of the pads 120 in the peripheral line region 112 and the layout of the output terminals 132 on the output terminal 131a correspond to each other, wherein the distance between any two adjacent pads 120 is equal, and any two adjacent output terminals 132 The distance between the two is equal, and the distance between any two adjacent pads 120 is substantially the same as the distance between any two adjacent output terminals 132. On the other hand, the reinforcing adhesive layer 150 is located on at least one of the pads 120 and the output terminals 132. Here, the reinforcing adhesive layer 150 is located between the pads 120 and the side edges 110s of the panel 110, for example, but the novel creation is not limited thereto.

Generally, the reinforced adhesive layer 150 may be an optical adhesive, a photo-curable adhesive or a double-sided adhesive. The reinforced adhesive layer 150 of the present embodiment is composed of, for example, a strip pattern, but the novel creation is not limited thereto. Here, the length of the reinforcing adhesive layer 150 is, for example, greater than or equal to the arrangement length of the output terminals 132 on the output end 131a, or the arrangement length of the pads 120 on the peripheral line region 112 to ensure the flexible circuit. The strength of bonding between the board 130 and the panel 110.

3 is a schematic view of the flexible circuit board of FIG. 2 assembled with a printed circuit board. Referring to FIG. 1 to FIG. 3 , in the embodiment, the flexible circuit board 130 further includes at least one input terminal 133 disposed at the input end 131 b , wherein the corresponding terminal 133 and the output terminal 132 are permeable to corresponding wires. (not shown) are electrically connected to each other. Specifically, the panel structure 100 is disposed substantially above the printed circuit board 200, that is, the output end 131a of the panel 110 and the printed circuit board 200 are respectively located on opposite sides of the panel 110. Therefore, when the input end 131b is assembled to the printed circuit board 200, the flexible end of the printed circuit board 200 is moved by bending the flexible substrate 131 so that the flexible circuit board 130 can pass through. The input terminal 133 is electrically connected to the printed circuit board 200.

In general, the stress generated when the flexible substrate 131 is bent is generally concentrated on the bonding region 101, but the reinforcing adhesive layer 150 is further disposed between the flexible circuit board 130 and the panel 110. It helps to improve the bonding strength between the flexible circuit board 130 and the panel 110, so that the connection relationship between the flexible circuit board 130 and the panel 110 is not easily affected by the aforementioned stress, and can be continuously and firmly bonded. Together. In other words, the panel structure 100 of the present embodiment can have good reliability, and the touch display device or the electronic device to which the panel structure 100 of the present embodiment is applied can also have better product yield. On the other hand, even if the flexible substrate 131 is bent in the opposite direction of the input end 131b toward the printed circuit board 200, the reinforcing adhesive layer 150 disposed between the flexible circuit board 130 and the panel 110 can be achieved. The same utility, so avoid the occurrence of flexible electricity When the road board 130 is bent, it is peeled off from the panel 110.

Other embodiments are listed below for illustration. It is to be noted that the following embodiments use the same reference numerals and parts of the above-mentioned embodiments, and the same reference numerals are used to refer to the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted portions, reference may be made to the foregoing embodiments, and the following embodiments are not repeated.

4 is a partial top plan view of a panel structure of another embodiment of the present invention. Referring to FIG. 4, the panel structure 100A is substantially similar to the panel structure 100 of FIG. 1, but the main difference is that the reinforcing adhesive layer 150a is composed of, for example, a plurality of block patterns.

FIG. 5 is a partial top plan view of a panel structure of another embodiment of the present invention. Referring to FIG. 5, the panel structure 100B is substantially similar to the panel structure 100 of FIG. 1, but the main difference is that the reinforcing adhesive layer 150b is, for example, a plurality of strip patterns surrounding the pads 120 and the output terminals 132. Composed of.

6 is a partial top plan view of a panel structure of another embodiment of the present invention. Referring to FIG. 6, the panel structure 100C is substantially similar to the panel structure 100B of FIG. 5, but the main difference is that the reinforcing adhesive layer 150c is, for example, a single annular pattern surrounding the pads 120 and the output terminals 132. Composed of.

7 is a partial top plan view of a panel structure of another embodiment of the present invention. Referring to FIG. 7, the panel structure 100D is substantially similar to the panel structure 100B of FIG. 5, but the main difference is that the reinforcing adhesive layer 150d is, for example, a plurality of block patterns surrounding the pads 120 and the output terminals 132. Composed of.

8 is a partial top plan view of a panel structure of another embodiment of the present invention. Referring to FIG. 8, the panel structure 100E is substantially similar to the panel structure 100 of FIG. 1, but the main difference is that the reinforcing adhesive layer 150e is, for example, U surrounded by the pads 120 and any three sides of the output terminals 132. The font pattern is composed of.

In addition to the layout of the above-mentioned reinforced rubber layer, in other possible embodiments, the reinforced rubber layer also has various variations. For example, a reinforced adhesive layer similar to the reinforced adhesive layer 150e composed of a U-shaped pattern may be three strip patterns or a plurality of blocks arranged on the three sides of the pads 120 and the output terminals 132. Figure 2 consists of. In addition, a reinforced adhesive layer may be disposed on either side of the pads 120 and the output terminals 132, and is substantially L-shaped or II-shaped. The reinforced adhesive layer of the layout may be a continuous pattern or a non- A continuous pattern (for example, two strip patterns or a plurality of block patterns) is composed.

In summary, since the panel structure of the present invention is provided with a reinforced adhesive layer in a joint area between a flexible circuit board and a panel (for example, a touch panel or a display panel), the flexible circuit board and the panel (for example, The touch panel or the display panel can be firmly bonded through the reinforced adhesive layer, and the panel structure is not easily deformed from the panel when the flexible circuit board is bent in a subsequent assembly operation (for example, a touch panel or a display panel) The panel is peeled off, thereby improving the reliability of the panel structure.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the novel creation, and any person skilled in the art can make some changes without departing from the spirit and scope of the novel creation. Retouching, the scope of protection of this new creation is subject to the definition of the scope of the patent application attached.

100‧‧‧ panel structure

101‧‧‧ junction area

110‧‧‧ panel

110s‧‧‧lateral edge

111‧‧‧ touch area

112‧‧‧ Peripheral area

130‧‧‧Flexible circuit board

131‧‧‧Flexible substrate

131a‧‧‧output

131b‧‧‧ input

132‧‧‧Output terminal

133‧‧‧Input terminal

150‧‧‧Strengthened rubber layer

D‧‧‧Orientation

Claims (14)

A panel structure comprising: a panel having a peripheral line region; a plurality of pads located in the peripheral circuit region; and a flexible circuit board comprising: a flexible substrate having an opposite output end An input terminal; and a plurality of output terminals disposed at the output end; a conductive paste disposed between the output end having the output terminals and the peripheral line region having the pads, wherein each of the output terminals Aligning with the corresponding pad and electrically connecting to the corresponding pad through the conductive paste; and a reinforcing adhesive layer respectively bonding the output end having the output terminals and the pad having the pads The peripheral circuit area is covered by the conductive adhesive. The panel structure of claim 1, wherein the pads are juxtaposed in the peripheral circuit region, and the pads are arranged in a direction parallel to a side edge of the panel. The panel structure of claim 2, wherein the output terminals are juxtaposed to the output end, and the arrangement direction of the output terminals and the arrangement direction of the pads are parallel to each other. The panel structure of claim 3, wherein the distance between any two adjacent output terminals is equal. The panel structure of claim 2, wherein the distance between any two adjacent pads is equal. The panel structure of claim 1, wherein the output terminal partially covers the peripheral circuit region to define a bonding region, and the pads, the output terminals, the conductive paste, and the reinforcing adhesive layer are located In the junction area. The panel structure of claim 1, wherein the reinforcing adhesive layer is located on at least one side of the pads and the output terminals. The panel structure of claim 7, wherein the reinforcing adhesive layer is located between the pads and a side edge of the panel. The panel structure of claim 7, wherein the reinforcing adhesive layer surrounds the pads and the output terminals. The panel structure according to claim 7, wherein the reinforcing adhesive layer is in the form of a strip, a block or a U-shape. The panel structure of claim 7, wherein the length of the reinforcing layer is greater than or equal to an arrangement length of the output terminals on the output end, and a portion of the pads on the peripheral line region. Arrange the length. The panel structure of claim 1, wherein the flexible circuit board further comprises at least one input terminal disposed at the input end, the input end being adapted to be assembled to a printed circuit board to make the flexible circuit The circuit board is electrically connected to the printed circuit board through the at least one input terminal. The panel structure of claim 1, wherein the reinforced adhesive layer comprises an optical adhesive, a photo-curable adhesive or a double-sided adhesive. The panel structure of claim 1, wherein the conductive paste is an anisotropic conductive paste.