TWM470304U - Touch panel capable of increasing press alignment readability - Google Patents

Description

Touch panel capable of improving the alignment recognition

The present invention relates to a touch panel, and more particularly to a touch panel that can be conveniently judged whether the contacts of a flexible printed circuit board (FPC) are correctly aligned and electrically connected.

Nowadays, the size of touch-sensitive electronic products is mainly thin and light, so that the user can carry them. Therefore, the touch panel which is one of the main components must be as thin as possible. Referring to FIG. 8 , a new type of thin touch panel is called a single-plate touch panel, and an electrode sensing layer 72 is formed on one side of a substrate 70. A black ink layer 73 is positioned between the substrate 70 and the electrode sensing layer 72.

As shown in FIG. 9, the electrode sensing layer 72 is formed with a signal connecting portion 720. The signal connecting portion 720 is composed of a plurality of independent signal lines, and can be electrically connected to a flexible printed circuit board 80 by a pressing procedure. Referring to FIG. 10 again, when the crimping process is performed, a conductive adhesive layer 74 is first disposed on the signal connecting portion 720, generally using an anisotropic conductive adhesive (ACF) as the conductive adhesive layer 74, and then softening. The printed circuit board 80 is disposed on the surface of the conductive adhesive layer 84, and presses the flexible printed circuit board 80 downward to press the conductive contact 81 on the flexible printed circuit board 80 and the signal connecting portion 720. The signal lines are electrically connected.

The flexible printed circuit board 80 must be properly aligned with the substrate 70 to achieve good pinch yield, ensuring a reliable electrical connection between the two. Therefore, an alignment mark 721 is usually disposed around the signal connection portion 720, and the alignment mark 721 is not electrically connected to the signal connection portion 720, but is an independent mark. In the case of FIG. 9, a cross-shaped alignment mark 721 is provided on both sides of the signal connecting portion 720.

After the flexible printed circuit board 80 and the substrate 70 are pressed, the correct alignment between the two is checked in the manner shown in FIG. A light source 90 is provided on a side where the electrode sensing layer 72 is disposed to illuminate a pressing portion between the signal connecting portion 720 and the flexible printed circuit board 80, and an image capturing device (such as a CCD) 92 is used on the same side. The pressing portion is photographed to determine whether or not a misalignment has occurred based on the image taken out.

However, the existing touch panel has a problem of being difficult to recognize even if the alignment mark 721 is provided. Since the ink layer 73 which is not easy to transmit light is disposed around the substrate 70, and the conductive adhesive layer 74 covers the cross-shaped alignment mark 721, the conductive adhesive layer 74 and the flexible printed circuit board 80 are overlapped. After the conductive adhesive layer 74 is formed, it is more difficult to determine whether the alignment is correct according to the alignment mark 721. Therefore, it is difficult to directly determine whether the conductive contact 81 is properly aligned with the signal line according to the captured image, so that the alignment interpretation operation is changed. It is difficult and inconvenient.

In view of the fact that the conventional touch panel is not subjected to the crimping connection with the flexible printed circuit board, it is difficult to clearly identify whether it is properly aligned with the flexible printed circuit board, and it is difficult to ensure the manufacturing yield of the product; therefore, the main purpose of the creation is Providing a touch surface capable of improving the recognition of the pressing alignment The board can easily and accurately determine whether the flexible printed circuit is set at its preset position by the uniquely created alignment mark.

In order to achieve the foregoing objective, the present invention can improve a touch panel with a recognizable alignment: a substrate having an electrode sensing layer formed on one surface thereof, the electrode sensing layer including a plurality of signal lines extending to the side of the substrate, The signal lines together form a signal connection portion; an ink layer disposed between the substrate and the electrode sensing layer; wherein the signal connection portion is respectively provided with a pair of bit marks, Each of the alignment marks is not electrically connected to the signal line and includes a first horizontal portion, a second horizontal portion, a first vertical portion and a second vertical portion; the first vertical portion is adjacent to the signal line and A direction perpendicular to a side of the substrate in which the signal lines are located; the first horizontal portion and the second horizontal portion are parallel to each other and extend from a side of the first vertical portion, and the first horizontal portion is spaced apart from the second horizontal portion a first interval; the second vertical portion is parallel to the first vertical portion and vertically connects the first horizontal portion and the second horizontal portion.

Wherein, the signal connecting portion is electrically connected to a flexible printed circuit board, and when correctly aligned, the first/second horizontal portion is configured to determine whether the flexible printed circuit board has a vertical offset of the Y axis; the first The second vertical portion is configured to determine whether the flexible printed circuit board has a horizontal offset of the X-axis, thereby improving the alignment of the touch panel and the flexible printed circuit board, and quickly determining whether the two are correct. Bit electrical connection.

10‧‧‧Substrate

21‧‧‧ signal line

22‧‧‧Signal Connections

30, 40‧‧‧ alignment mark

31, 41‧‧‧ first horizontal department

32, 42‧‧‧ Second horizontal department

33, 43‧‧‧ first vertical

34, 44‧‧‧ second vertical

50‧‧‧ Conductive adhesive layer

60‧‧‧Soft printed circuit board

62‧‧‧Connecting Department

63‧‧‧Electrical contacts

64a, 64b‧‧‧ vertical marking

65a, 65b‧‧‧ first level marking department

66a, 66b‧‧‧Second level marking department

70‧‧‧Substrate

72‧‧‧Electrode sensing layer

720‧‧‧Signal Connections

721‧‧‧ alignment mark

73‧‧‧Ink layer

74‧‧‧ Conductive adhesive layer

80‧‧‧Soft printed circuit board

81‧‧‧Electrical contacts

90‧‧‧Light source

92‧‧‧Image capture device

Figure 1: Schematic diagram of the signal connection and alignment mark on the created touch panel.

Figure 2: First schematic view of the conductive adhesive attached to the surface of the signal and the surface of the alignment mark.

Figure 3: Schematic diagram of a flexible printed circuit board pressed against the present touch panel.

Figure 4: A second schematic view of the conductive adhesive attached to the surface of the signal and the surface of the alignment mark.

Figure 5: Schematic diagram of the flexible printed circuit board pressed against the touch panel shown in Figure 4.

Fig. 6 is a third schematic view showing the bonding of the conductive adhesive to the surface of the present signal and the surface of the alignment mark.

Figure 7: A schematic view of the flexible printed circuit board pressed against the touch panel shown in Figure 6.

Figure 8: Schematic diagram of the pressing view operation of the existing single-panel touch panel.

Figure 9: An enlarged view of the signal connection of the existing single-panel touch panel.

FIG. 10 is an enlarged view of a conventional single-panel touch panel with a signal connection and a flexible printed circuit board.

The touch panel of the present invention is a single-plate touch panel, and the structure also includes a substrate, an electrode sensing layer formed on the surface of the substrate, and a black ink layer. The ink layer is disposed on the area around the substrate and coated. Between the substrate and the electrode sensing layer; however, the created touch panel has a unique alignment mark that can be used to determine whether the flexible printed circuit board is properly placed On the touch panel.

Please refer to FIG. 1 , which is a partial enlarged view of the touch panel of the present invention. An electrode sensing layer is formed on a surface of the substrate 10 , and the electrode sensing layer includes a plurality of signal lines 21 extending to the side of the substrate 10 . The signal lines 21 together form a signal connection portion 22. A pair of position marks 30, 40 are respectively disposed on both sides of the signal connecting portion 22, and the two alignment marks 30, 40 have a symmetrical structure and are not electrically connected to any signal line 21.

Each of the alignment marks 30, 40 includes a first horizontal portion 31, 41, a second horizontal portion 32, 42, a first vertical portion 33, 43 and a second vertical portion 34, 44. Since the two alignment marks 30, 40 are symmetrical structures, one of the alignment marks 30 will be described in detail below.

The first vertical portion 33 is adjacent to the signal line 21 and extends in a direction perpendicular to the side of the substrate 10 where the signal lines 21 are located, that is, the direction in which the parallel signal lines 21 extend.

The first horizontal portion 31 and the second horizontal portion 32 are arranged in parallel with each other and extend outward from the side of the first vertical portion 33. The external extension means extending in a direction away from the signal line 21, and the first horizontal portion 31 is The second horizontal portion 32 is apart from the first interval D1. In this embodiment, the second horizontal portion 32 is closer to the side of the substrate 10, and the first horizontal portion 32 is farther from the side of the substrate 10.

The length of the second vertical portion 34 is slightly shorter than the first vertical portion 33 and parallel to the first vertical portion. The second vertical portion 34 is perpendicularly connected to the first horizontal portion 31 and the second horizontal portion 32, and the connection position is approximately The first horizontal portion 31 and the middle portion of the second horizontal portion 32, and one end of the second vertical portion 34 further extends through the first horizontal portion 31.

Referring to FIG. 2, when the flexible printed circuit board 60 is pressed against the signal connecting portion 22 of the touch panel, a conductive adhesive layer 50 is first disposed on the surface of the signal connecting portion 22. The first interval D1 of the first horizontal portion 31, 41 and the second horizontal portion 32, 42 is greater than the width of the conductive adhesive layer 50, and the second interval D2 between the two second vertical portions 34, 44 is related to the softness. The connection 埠62 of the printed circuit board 60 is equal in width. In the case where the conductive adhesive layer 50 is properly attached, the conductive adhesive layer 50 may be interposed between the first horizontal portions 31, 41 and the second horizontal portions 32, 42 without being displaced.

In the aspect of the flexible printed circuit board 60, the bonding surface of the connection port 62 forms a plurality of conductive contacts 63, and the conductive contacts 63 are electrically connected to the signal lines 21, respectively. The opposite surface of the bonding surface of the flexible printed circuit board 60 has two markings corresponding to the alignment marks 30, 40, each marking symbol includes a vertical marking portion 64a, 64b, a first horizontal marking portion 65a, 65b and A second level indicating portion 66a, 66b. Wherein, the vertical indicating portions 64a, 64b, the first horizontal indicating portions 65a, 65b and the ends of the second horizontal indicating portions 66a, 66b each extend to the edge of the flexible printed circuit board 60; and the first horizontal indicating portions 65a, 65b and The second horizontal indicator portions 66a, 66b extend outward from the edges of the vertical indicator portions 64a, 64b.

Referring to FIG. 3, when the flexible printed circuit board 60 is pressed against the substrate 10, since the two mark marks are exposed on the upper surface of the flexible printed circuit board 60, the two mark marks and the two pairs of marks 30 can be visually inspected. The relative position between 40, thereby determining whether the flexible printed circuit board 60 is properly aligned with the substrate 10. Wherein, when properly aligned, the connecting portion 62 of the flexible printed circuit board 60 has its opposite edges aligned with the two second vertical portions 34, 44; if the two vertical indicating portions 64a, 64 are aligned with the first two on the substrate 10 Drooping The straight portions 33, 43 represent that the X-axis horizontal offset does not occur; the first horizontal indicator portions 65a, 65b and the second horizontal indicator portions 66a, 66b are respectively aligned with the first horizontal portions 31, 41 on the substrate 10. The second horizontal portion 32, 42 represents that the vertical offset of the Y-axis does not occur.

Referring to FIG. 4 and FIG. 5, if the position where the conductive adhesive layer 50 is attached is shifted upward, the first horizontal portions 31, 41 covering the substrate 10 can still be performed by the second horizontal portions 32, 42. Judge. If the two vertical indicator portions 64a, 64 are aligned with the two first vertical portions 33, 43 on the substrate 10, the horizontal offset of the X-axis is not generated; and the two second horizontal indicator portions 66a, 66b are respectively aligned on the substrate 10. The second horizontal portion 32, 42 represents a vertical offset in which no Y-axis occurs.

Referring to FIG. 6 and FIG. 7, if the position where the conductive adhesive layer 50 is attached is shifted downward, the second horizontal portions 32, 42 covering the substrate 10 can still be covered by the first horizontal portion 31, 41. Make a judgment. If the two vertical indicator portions 64a, 64 are aligned with the two first vertical portions 33, 43 on the substrate 10, the horizontal offset of the X-axis is not generated; and the two second horizontal indicator portions 66a, 66b are respectively aligned on the substrate 10. The second horizontal portion 32, 42 represents a vertical offset in which no Y-axis occurs.

In summary, the touch panel of the present invention can be provided by providing two alignment marks 30 and 40 on the substrate 10 by using the two horizontal portions 31, 32 and the two vertical portions 33, 34 of the alignment marks 30, 40. The correct alignment with the flexible printed circuit board 60, even if the conductive adhesive layer 50 is offset to partially cover the alignment marks 30, 40, can be formed on the flexible printed circuit by other exposed horizontal portions and vertical portions. The markings on the board 60 are compared to directly and quickly determine whether the two are correctly aligned.

10‧‧‧Substrate

21‧‧‧ signal line

31, 41‧‧‧ first horizontal department

32, 42‧‧‧ Second horizontal department

33, 43‧‧‧ first vertical

34, 44‧‧‧ second vertical

50‧‧‧ Conductive adhesive layer

60‧‧‧Soft printed circuit board

63‧‧‧Electrical contacts

64a, 64b‧‧‧ vertical marking

65a, 65b‧‧‧ first level marking department

66a, 66b‧‧‧Second level marking department

Claims (7)

A touch panel capable of improving the recognition of the press-fit alignment includes: a substrate having an electrode sensing layer formed on a surface thereof, the electrode sensing layer comprising a plurality of signal lines extending to a side of the substrate, the signal lines Cooperating to form a signal connecting portion; an ink layer disposed in a surrounding area of the substrate and coated between the substrate and the electrode sensing layer; wherein the signal connecting portion is respectively provided with a pair of bit marks, and each of the bit marks Not electrically connected to the signal line and comprising a first horizontal portion, a second horizontal portion, a first vertical portion and a second vertical portion; the first vertical portion is adjacent to the signal line and perpendicular to the The signal line extends in a direction of a side of the substrate; the first horizontal portion and the second horizontal portion are parallel to each other and extend outward from a side of the first vertical portion, and the first horizontal portion is spaced apart from the second horizontal portion by a first interval The second vertical portion is parallel to the first vertical portion and vertically connects the first horizontal portion and the second horizontal portion. The touch panel capable of improving the registration of the alignment is provided on the signal connection portion, and the conductive connection layer is disposed on the signal connection portion, wherein the first interval is greater than the width of the conductive adhesive layer. The touch panel capable of improving the alignment of the alignment according to claim 1 or 2, wherein the signal connection portion is electrically connected to a connection of a flexible printed circuit board, wherein the second alignment of the two alignment marks is vertical The portions are spaced apart by a second interval that is equal to the width of the connection of the flexible printed circuit board. The touch surface capable of improving the registration degree of the registration as described in claim 1 or 2 a plate, the second vertical portion is vertically connected at a middle portion of the first horizontal portion and the second horizontal portion, and one end of the second vertical portion extends through the first horizontal portion. The touch panel capable of improving the recognizing alignment according to claim 3, wherein the second vertical portion is vertically connected at a middle portion of the first horizontal portion and the second horizontal portion, and one end of the second vertical portion extends Pass the first horizontal part. As described in claim 4, the touch panel with the degree of recognizing the alignment can be improved, and the first horizontal portion and the second horizontal portion are extended outward in a direction away from the signal line. As described in claim 5, the touch panel with the degree of recognizing the alignment can be improved, and the first horizontal portion and the second horizontal portion extend outward in a direction away from the signal line.