CN201117002Y - High-flatness capacitive touch panel - Google Patents

Abstract

The utility model discloses a high flatness capacitive touch panel, the bottom surface of conducting layer forms relative alternately electrode with the top surface of conducting layer once on one to the bottom surface of conducting layer is provided with a plurality of guide lines under this, makes the first end of each guide line correspond the first end of each electrode respectively, and the conducting layer corresponds the first end of each guide line and forms the through hole that the holding led electrical pillar down, and each leads electrical pillar and can connect each guide line and each electrode respectively, makes the bottom surface of flexible circuit board lug connection conducting layer down, so, the utility model discloses need not press from both sides between the conducting layer under/and establish this flexible circuit board, can effectively improve the flatness of conducting layer under/.

Description

High flatness capacitive touch panel

technical field

The utility model relates to a full-plane touch panel, in particular to a full-plane capacitive touch panel with high flatness.

Background technique

Please refer to FIG. 10, the currently used touch panel is composed of an upper conductive layer 70, a lower conductive layer 80 and a substrate 90. Taking a capacitive touch panel as an example for illustration, the bottom surface of the upper conductive layer 70 A plurality of column electrodes 71 are formed, and each column electrode 71 is respectively connected to a first end of an upper lead wire 72, and the second end of each upper lead wire 72 extends to one side of the upper conductive layer 70 together; the lower conductive layer The top surface of 80 is formed with a plurality of row electrodes 81, and each row electrode 81 is respectively connected to the first end of the lower lead wire 82, and the second end of each lower lead wire 82 then extends to the position corresponding to the second end of the upper lead wire 72. When assembling The upper/lower conductive layers 70, 80 are arranged facing each other, and optical glue is arranged therebetween, and the guide pins of a flexible circuit board 50c are connected to the first lead wires 72, 82 of the upper/lower conductive layers 70, 80. The two terminals are in contact to form an electrical connection; the combined upper/lower conductive layers 70 and 80 are further disposed on the aforementioned substrate 90 to form a touch panel.

From the above, it can be seen that the flexible circuit board of the touch panel is sandwiched between the upper and lower conductive layers. However, the yield rate of the touch panel process is related to whether the transparent conductive material of the upper/lower conductive layer is evenly coated. Therefore, after the transparent conductive material is coated, it is necessary to print wires, glue and press the flexible circuit board. It will change the thickness of the originally precision-coated transparent conductive material, resulting in poor overall flatness. Furthermore, in addition to the flatness of the upper/lower conductive layer being affected by the thickness of the flexible circuit board, the upper/lower lead wires extend to one side of the conductive layer in a concentrated manner for the connection and contact of the flexible circuit board Therefore, both the flexible circuit board and the lead wire will affect the flatness of the touch panel.

Contents of the invention

In view of the above disadvantages, the present invention provides a high-flatness capacitive touch panel, which has better flatness and effectively improves the yield and accuracy of the touch panel.

To achieve the above purpose, the main technical means used is to make the high-flatness capacitive touch panel include:

An upper conductive layer has a top surface and a bottom surface, the bottom surface is formed with a plurality of side-by-side upper electrodes, and each upper electrode has a first end;

The lower conductive layer has a top surface, a bottom surface and a number of through holes, a number of lower electrodes are formed on the top surface, and each lower electrode has a first end, and is relatively crossed with the aforementioned upper electrode; the bottom surface is formed with a number of The first guiding line and the plurality of second guiding lines each have a front end and an end. The front ends of the first guiding lines correspond to the first ends of the upper electrodes respectively, and the front ends of the second guiding lines correspond to the first ends of the lower electrodes respectively. The end of the first lead wire and the end of the second lead wire extend to one side of the lower conductive layer together; each through hole corresponds to the first end position of each upper electrode and lower electrode and penetrates the top surface of the lower conductive layer and the first end of the lower electrode. bottom surface;

A plurality of first conductive pillars and a plurality of second conductive pillars are accommodated in each through hole, and each has a bottom end and a top end. The top ends of the first conductive posts protrude from the through holes respectively and are extended and connected to the upper electrodes; The through holes are extended and connected to the lower electrodes.

The utility model may further include at least one middle conductive layer, and the middle conductive layer is disposed between the upper conductive layer and the lower conductive layer to reduce electromagnetic interference between the upper conductive layer and the lower conductive layer.

The touch panel of the utility model mainly arranges several guide wires on the bottom surface of the lower conductive layer, so that the first ends of each guide wire respectively correspond to the first ends of the upper/lower electrodes of the upper/lower conductive layer, and the lower conductive layer corresponds to The first end of each guide line forms a through hole for the conductive column to pass through; so when the upper/lower conductive layer and the substrate are bonded to each other, the conductive column corresponding to the first end of each electrode will be connected to each guide line and the substrate respectively. Each electrode, so the signal of the upper/lower electrode can be transmitted to the bottom surface of the lower conductive layer, so that the flexible circuit board can be directly connected to the bottom surface of the lower conductive layer; therefore, the corresponding surface of the upper/lower conductive layer of the utility model is only It is necessary to form electrodes instead of lead wires, and the flexible circuit board is not sandwiched between the upper/lower conductive layers but directly connected to the bottom surface of the lower conductive layer, so the flatness of the touch panel of the present invention can be controlled more precisely .

Description of drawings

Fig. 1 is a three-dimensional exploded view of the first embodiment of the utility model;

Fig. 2 is a combined appearance diagram of the first embodiment of the utility model;

Fig. 3 is a partially enlarged cross-sectional view of the conductive column connected to the upper electrode in the first embodiment of the utility model;

Fig. 4 is a partially enlarged cross-sectional view of the conductive column connected to the lower electrode in the first embodiment of the present invention;

Fig. 5 is a three-dimensional exploded view of a second preferred embodiment of the present invention;

Fig. 6 is a combined appearance diagram of the second embodiment of the utility model;

Fig. 7 is a partially enlarged cross-sectional view of the conductive column connected to the lower electrode in the second embodiment of the present invention;

Fig. 8 is a partial enlarged cross-sectional view of the second embodiment of the utility model in which the conductive column is connected to the middle electrode;

Fig. 9 is a partial enlarged cross-sectional view of the conductive column connected to the upper electrode in the second embodiment of the present invention; and

FIG. 10 is an exploded perspective view of a conventional touch panel.

Detailed ways

First please refer to Figures 1 and 2, which are an exploded view and an assembled view of the first embodiment of the present invention. The present invention can be applied to a capacitive touch panel, which includes:

An upper conductive layer 10 has a top surface and a bottom surface, and a plurality of upper electrodes 11 are formed on the bottom surface, in this embodiment, a plurality of column electrodes arranged side by side, and each upper electrode 11 has a first end 110;

The lower conductive layer 20, located below the upper conductive layer 10, has a top surface, a bottom surface and a plurality of through holes 22, and a plurality of lower electrodes 21 are formed on the top surface, which in this embodiment are row electrodes arranged side by side, and each The lower electrode 21 has a first end 210, and is opposite to the upper electrode 11; the bottom surface is formed with a plurality of first guiding lines 23a and second guiding lines 23b, and the first guiding lines 23a and the second guiding lines 23b are respectively It has a front end 230a, 230b and an end 231a, 231b, wherein the front end 230a of each first guiding line 23a corresponds to the first end 110 of the aforementioned upper electrode 11 respectively; The first end 210, and the ends 231a, 231b of the first lead wire 23a and the second lead wire 23b extend to one side of the lower conductive layer 20 together to connect to a flexible circuit board 50a; each through hole 22 corresponds to each The positions of the first end 110 of the upper electrode 11 and the first end 210 of the lower electrode 21 penetrate through the top surface and the bottom surface of the lower conductive layer 20;

A plurality of first conductive columns 24a and a plurality of second conductive columns 24b, please refer to FIG. Each bottom end is respectively connected to the first lead wire 23a of the lower conductive layer 20, and the top end protrudes from the through hole 22 to extend and connect to the first end 110 of each upper electrode 11; please refer to FIG. 4, the second conductive column 24b are respectively located in the through holes 22 corresponding to the first ends 210 of the lower electrodes 21, and have a bottom end and a top end. And the extension is connected to the first end 210 of each lower electrode 21 .

In this embodiment, a lower substrate 40 may be further included, which is interposed between the upper conductive layer 10 and the lower conductive layer 20 through optical glue, and a plurality of through holes 41 are formed corresponding to the first end 110 of the upper electrode 11, and each through hole 41 Corresponding to the through hole 22 of the lower conductive layer 20 , the first conductive column 24 a passes through the through hole 41 of the lower substrate 40 to be connected to the upper electrode 11 .

As shown in FIG. 3 and FIG. 4, when the upper/lower conductive layers 10, 20 and the lower substrate 40 are bonded together, the tops of the first conductive pillar 24a and the second conductive pillar 24b will contact the upper electrode 11 and the lower electrode 21 respectively. , and the bottom ends of the first conductive pillars 24a are respectively connected to the first lead wires 23a of the lower conductive layer 20; thus, the signal of the upper electrode 11 is transmitted to the first lead wires 23a on the bottom surface of the lower conductive layer 20 through the first conductive pillars 24a , and then transmitted to the flexible circuit board 50a connected to the end 231a of the first lead wire 23a; similarly, the bottom ends of the second conductive pillars 24b are respectively connected to the second lead wire 23b of the lower conductive layer 20; thus, the lower electrode 21 The signal is transmitted to the second lead wire 23b on the bottom surface of the lower conductive layer 20 through the second conductive pillar 24b, and then to the flexible circuit board 50a connected to the end 231b of the second lead wire 23b. Therefore, the flexible printed circuit board 50a can be directly disposed on the bottom surface of the lower conductive layer 20, and correspondingly connected to the first lead wire 23a and the second lead wire 23b to obtain or provide signals of the upper/lower electrodes 11, 21.

Please refer to Figures 5 and 6, which are an exploded view and an assembled view of the second embodiment of the present invention. The difference from the first embodiment is that the second embodiment further includes: a conductive layer 60, which is passed through an optical glue Interposed between the upper conductive layer 10 and the lower substrate 40, it has a top surface, a bottom surface and a plurality of through holes 62. The bottom surface is formed with a middle electrode 61 corresponding to the upper/lower electrodes 11, 21. The middle electrode 61 has a The first end 610 and each through-hole 62 correspond to the first end 110 of the upper electrode 11 and are aligned with the through-hole 22 of the lower conductive layer 20 , so that the first conductive pillar 24 a is connected to the upper electrode 11 through each through-hole 62 .

Compared with the aforementioned upper/lower electrodes 11, 21, the lower conductive layer 20 also forms a corresponding through hole 22 corresponding to the first end 610 of the middle electrode 61 and forms a corresponding third lead line 23c on the bottom surface, and on the corresponding A third conductive column 24c is arranged in the through hole 22, so that the signal of the middle electrode 61 can also be transmitted to the bottom surface of the lower conductive layer 20 through the third conductive column 24c, and the bottom end of the third conductive column 24c is also connected to the third lead wire 23c To further transmit the signal to a flexible circuit board 50b.

Referring to FIG. 7, FIG. 8 and FIG. 9 in sequence, the second, third and first conductive columns 24b, 24c, and 24a of the second embodiment are connected to the lower electrode 21, the middle electrode 61 and the upper electrode 11 in sequence. From the cross-sectional view, it can be seen that except that the lower electrode 21 is formed on the top surface of the lower conductive layer 20, the middle electrode 61 and the upper electrode 11 are respectively formed on the bottom surfaces of the middle conductive layer 60 and the upper conductive layer 10, and each electrode is formed by the second, second, and upper electrodes respectively. The third and first conductive pillars 24 b , 24 c , 24 a are connected to the bottom surface of the lower conductive layer 20 . Therefore, only need to arrange the flexible circuit board 50b on the bottom surface of the lower conductive layer 20 and connect with the first, second and third lead wires 23a, 23b, 23c of the lower conductive layer 20 to obtain or provide upper/lower/middle Signals from electrodes 11, 21, 61.

To sum up, the touch panel of the present utility model forms the guide wires on the original conductive layers on the bottom surface of the lowermost conductive layer, and each guide wire is connected to the electrodes of each conductive layer through conductive columns, so that the flexible The circuit board is no longer sandwiched between the conductive layers. Therefore, the combined flatness of the conductive layers of the present invention can be controlled in an optimal state, presenting a fully flat touch panel.

Claims (8)

1. a high flat degree capacitance type touch-control panel is characterized in that: comprise

Conductive layer on one has an end face and a bottom surface, and its bottom surface is formed with some top electrodes, and each top electrode has one first end;

One lower conductiving layer has an end face, a bottom surface and some through holes, and its end face is formed with some bottom electrodes, and each bottom electrode has one first end, and is relative with aforementioned top electrode and intersects; This bottom surface then is formed with some first guide lines and some second guide lines, all respectively have a front end and an end, the front end of first guide line is corresponding aforementioned top electrode first end respectively, the front end of second guide line is first end of corresponding bottom electrode respectively, and the end of the end of first guide line and second guide line then together extends to a side of lower conductiving layer; First end position of corresponding each top electrode of each through hole and bottom electrode and connect the end face and the bottom surface of lower conductiving layer; And

Some first conductive poles and some second conductive poles, be placed in each through hole, respectively have a bottom and a top, the bottom of each first conductive pole connects first guide line of lower conductiving layer respectively, and the top of each first conductive pole then protrudes from through hole respectively and extends and be connected to each top electrode; The bottom of each second conductive pole connects second guide line of lower conductiving layer respectively, and the top of each second conductive pole then protrudes from through hole respectively and extends and be connected to each bottom electrode.

2. high flat degree capacitance type touch-control panel as claimed in claim 1 is characterized in that: very some row electrodes side by side that power on of conductive layer on this; The bottom electrode of this lower conductiving layer is some column electrodes side by side.

3. high flat degree capacitance type touch-control panel as claimed in claim 1, it is characterized in that: further comprise an infrabasal plate, this infrabasal plate is to be located between conductive layer and the lower conductiving layer by optical cement, and at the position of corresponding top electrode first end formation perforation, the through hole of the involutory lower conductiving layer of each perforation.

4. high flat degree capacitance type touch-control panel as claimed in claim 3 is characterized in that: each guide line end is connected to a flexible circuit board.

5. high flat degree capacitance type touch-control panel as claimed in claim 3, it is characterized in that: can further comprise conductive layer in, be located between conductive layer and the infrabasal plate by optical cement, have a bottom surface and some perforations, its bottom surface is formed with at least one middle electrode; First end of the corresponding top electrode of each perforation and involutory with the through hole of lower conductiving layer.

6. high flat degree capacitance type touch-control panel as claimed in claim 5 is characterized in that: electrode has one first end in this; This infrabasal plate further to should in first end of electrode be formed with perforation; This lower conductiving layer further to should in first end of electrode be formed with through hole; The bottom surface of this lower conductiving layer further forms a pair of the 3rd guide line that should through hole.

7. high flat degree capacitance type touch-control panel as claimed in claim 6, it is characterized in that: be equipped with one the 3rd conductive pole in this correspondence in the through hole of electrode first end, the bottom of the 3rd conductive pole connects the front end to the 3rd guide line that should through hole, the perforation that passes electrode first end in the infrabasal plate correspondence is then extended on the 3rd conductive pole top, and then is connected to first end of middle electrode.

8. high flat degree capacitance type touch-control panel as claimed in claim 7 is characterized in that: the 3rd guide line that the 3rd conductive pole of electrode is connected in this connection, its terminal flexible circuit board that connects.

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