CN204883650U - Shielded wire structure and touch -sensitive screen - Google Patents

Abstract

The utility model discloses a shielded wire structure and touch -sensitive screen, the foundation the utility model discloses, being different from the structure of single current shielded wire, having adopted two inside and outside structures that set up of shielded wire, match in single shielded wire, not only silver thick liquid quantity significantly reduces, but also can have equivalent shielding effect.

Description

Shielding line structure and touch-screen

Technical field

The utility model relates to a kind of operator guards being applied to touch-screen, specifically shielding line structure, and applies the touch-screen of this shielding line structure.

Background technology

Touch-screen, such as G1F, i.e. GlassSingleFilm, be also expressed as Glass-Film, and wherein G represents Glass(glass), F represents ITOFilm(Indium-tin Oxide Transparent Conductive Film).The window area of its funtion part institute's applying electronic equipment often, the window area of such as mobile phone, this region is touch area.

The funtion part of touch area is generally the capacitance structure that such as transparency conducting layer and the insulation course that adapts to are formed, and in order to touch sensitive, produce faint electric signal, this region is generally also referred to as functional areas (sensor).Because this electric signal is too faint, therefore need to shield harassing of external signal.

As shown in Figure 1, known, frame circuit 3 by functional sheet 1 produce electric signal and deliver to FPC(FlexiblePrintedCircuitboard, flexible PCB, also known as soft board), to carry out signal transacting, generate the coordinate of touch point, therefore frame circuit 3 also needs to avoid harassing of external signal.

Wherein frame circuit 3 is generally produced by the printing of silver slurry, and when printing frame circuit, the shielding line 2 of the given width of its peripheral printing, see Fig. 2, such as width W is the shielding line 2 of 1mm, undesired signal so as to producing capacitance masks, to operational zone, and the environment that namely one, window area is clean.

Current shielding line generally adopts the printing of silver slurry to produce, and the waste silver slurry that wide shielding line can be too much, causes cost to raise.

In some implementations, the flat wire harness of screen net structure is adopted to be used as shielding line, but, the shielding line thickness that touch-screen uses is very thin, general is all adopt typography to be formed, and is bonded on matrix and has larger thickness, thus add the seal ring thickness of touch-screen by the wire harness of screen net structure, not only affect the outward appearance of touch-screen, and the manufacture difficulty of such as transparency conducting layer can be increased.

Utility model content

Therefore, the purpose of this utility model is, provides a kind of shielding line structure, and uses the touch-screen of this shielding line structure, to reduce the use of silver slurry, thus cost-saving.

The utility model is by the following technical solutions:

According to an aspect of the present utility model, a kind of shielding line structure, is applied to touch-screen, comprises:

Interior silver-colored line, is positioned at the frame region of touch-screen;

Outer silver-colored line, is centered around the periphery of interior silver-colored line; And

Grounding parts, connects described interior silver-colored line and outer silver-colored line.

Above-mentioned shielding line structure, in certain embodiments, the width of described interior silver-colored line is 75 ~ 80 μm, the width of outer silver-colored line 75 ~ 85 μm.

Alternatively, the spacing of described interior silver-colored line and interior silver-colored line is 0.8 ~ 1.0mm.

Alternatively, be provided with in order to form the dowel be electrically connected between interior silver-colored line and outer silver-colored line, and the quantity of dowel is no less than 20.

Alternatively, on interior silver-colored line bearing of trend, a dowel is set every 8 ~ 20mm.

Further, described dowel at least comprises drift angle dowel, with within the connecting of silver-colored line drift angle and the outer corresponding drift angle of silver-colored line.

Alternatively, except drift angle dowel, all the other dowels are vertical with interior silver-colored line.

Alternatively, except drift angle dowel, the angle of all the other dowels and interior silver-colored line is 45 ~ 80 degree.

Alternatively, the two ends of described dowel are connector, and the two ends for dowel are corresponding to be connected with interior silver-colored line and outer silver-colored line, and wherein connector is configured to even transition corresponding to the both sides at dowel two ends.

According to another aspect of the present utility model, a kind of touch-screen, has the shielding line structure as a utility model people aspect.

According to being originally utility model, be different from the structure of existing single shielding line, have employed the inside and outside structure arranged of two shielding lines, be matched with single shielding line, not only silver slurry consumption greatly reduces, but also can have the shield effectiveness of equivalence.

Accompanying drawing explanation

Fig. 1 is known a kind of touch-screen shielding line print structure schematic diagram.

Fig. 2 is the A portion enlarged drawing of Fig. 1.

Fig. 3 is according to a kind of touch-screen shielding line print structure schematic diagram of the present utility model.

Fig. 4 is the B portion enlarged drawing of Fig. 3.

Fig. 5 is the structural allocation schematic diagram of dowel in an embodiment.

In figure: 1. functional sheet, 2. shielding line, 3. frame circuit.

Silver-colored line in 21., 22. dowels, 23. outer silver-colored lines, 24. drift angles, 25. drift angle dowels, 26. transition arcs.

H and W represents width.

Embodiment

With reference to Figure of description 1 and Fig. 3, shielding line 2 is a rectangular configuration substantially, nature, as shown in Fig. 1 and Fig. 3 right part, the region at right part place is for realizing the connection with FPC, shielding line is positioned at the both sides up and down of Wiring area, and does not form a closed framework, is generally also formed with connection terminal or other wiring constructions of shielding line in the region at right part place.Shielding line 2 is equivalent to a rectangle frame structure on the whole.

In addition, the part of the right part of shielding line 2 shown in Fig. 1 and Fig. 3 is also not parallel with the part on the left side, but has a tracking structure according to the shape of frame circuit 3, or has the structure of a step change according to the structure of frame circuit 3 right part in the drawings.

For convenience of describing, the part being equivalent to rectangle drift angle shown in Fig. 4 is called drift angle 24, and remainder is called sideline.So as shown in Figure 3,4 drift angles 24 should be comprised, have three complete sidelines and the part sideline of two shown in Fig. 3 right part simultaneously.

See a kind of shielding line structure shown in Figure of description 2-5, be applied to touch-screen, the silk-screen printing technique based on silver slurry (i.e. conductive silver paste) is formed, and after finishing printing, needs baking, makes printed silver slurry stitching (the being called for short silver-colored line) solidification formed.

Thus, shielding line structure as in Figure 3-5, its basic structure comprises:

Interior silver-colored line 21, is positioned at the frame region of touch-screen, is centered around the periphery of part to be shielded, and with SI semi-insulation to be shielded.

Outer silver-colored line 23, be centered around the periphery of interior silver-colored line 21, in edge area, interior silver-colored line 21 is parallel to each other with outer silver-colored line 23, is parallel to each other not absolute in edge area, can with reference to the structure of existing single shielding line 2, interior silver-colored line 21 can be equivalent to the inside edge part of existing single shielding line, and correspondingly, outer silver-colored line 23 can be equivalent to the outer edge part of single shielding line 2, the position relationship of interior silver-colored line 21 and outer silver-colored line 23 is set accordingly.

Shielding line needs ground connection, therefore needs to configure grounding parts, in order to connect described interior silver-colored line 21 and outer silver-colored line 23.

In the region shown in Fig. 3 right part, be generally used for and be connected with FPC, the grounding parts of usual shielding line forms terminal, is positioned at the cross-talk of the outermost of the both sides up and down in hot pressing district (region be namely connected with FPC hot pressing), be linked into FPC, thus with the grounded part together ground connection of FPC.

Through checking, use two silver-colored lines to replace single shielding line, be less than the condition of single shielding line 2 width in two silver medal line width sums under, still obtain the shield effectiveness of equivalence, and the conductive silver paste amount used greatly reduces, and has saved cost.

In certain embodiments, the width of outer silver-colored line 23 is greater than the width of interior silver-colored line 21, under the condition that silver-colored line 23 is equal with Nei Yin line 21 width summation outside, often can possess shield effectiveness better.

In certain embodiments, the width of outer silver-colored line 23 is 1.5 ~ 2 times of interior silver-colored line width, and in restriction, silver-colored line 21 is meticulous, easily break, or direct impedance is excessive, causes shield effectiveness to decline.

Generally speaking, in order to improve product yield, silver-colored line is not easily narrow, and generally not easily lower than 5 μm, otherwise broken string Hazard ratio is larger.

In order to obtain good shield effectiveness, in the present embodiment, silver-colored line width is selected to be not less than 75 μm and is advisable.

In some implementations, interior silver-colored line 21 and outer silver-colored line 23 adopt the silver-colored line with same widths, convenient wiring.

Further, the width of interior silver-colored line 21 and outer silver-colored line 23 is also not easily excessive, otherwise just lose the effect of saving conductive silver paste, therefore, preferably, in the present embodiment, use the width of silver-colored line had better not be greater than 100 μm, be preferably maximum 85 μm, under the condition with good shielding action, broken string risk is relatively low.

Outside desilver line width, by the restriction in frame space, the distance of silver line not easily two bullion lines is not easily excessive, and it is also unsuitable too small, otherwise too small spacing can affect shield effectiveness, find through long-term experiment, the distance between two silver-colored lines has good shielding action when about 0.9mm, optional spacing range is [0.8mm, 1.0mm].

There is intrinsic defect in the printing of silver slurry, namely blanking can not ensure absolute homogeneity, thus form silver-colored line and be different from the single shielding line 2 with larger width, easily produce broken string risk, break once shielding line produces more than two places, then cannot form effective shielding construction.

In view of this, for structure specific in the utility model, be provided with between interior silver-colored line 21 and outer silver-colored line 23 in order to form the dowel 22 be electrically connected, and the quantity of dowel 22 is no less than 20, the conducting structure between inside and outside silver-colored line can be formed thus, meanwhile, the existence of dowel 22 also improves the overall construction intensity of shielding line structure.

Based on said structure, if silver-colored line 21 breaks somewhere such as, so dowel 22 still can ensure that the electric charge as line 21 silver-colored in shielding line is inducted is gone out by the conducting of outer silver-colored line 23.

Even if there is many places broken string, then by more dowel 22, the part-structure of shielding line is avoided to be free on outside entirety.

Preferably, a dowel 22 is set every 8 ~ 20mm, there is the dowel 22 of larger distribution density, broken string risk can be effectively reduced, and structure can make shielding line structure have higher physical strength by this.

Preferably, the spacing of dowel 22 is 10mm.

Further, concentrate because corner part easily forms stress, in other words, more easily produce broken string, for this reason, described dowel 22 at least comprises drift angle dowel 25, as shown in Figure 4, with within the connecting of silver-colored line 21 drift angle and the outer silver-colored corresponding drift angle of line 23.

In addition, about the width of dowel 22, drift angle dowel 25 wherein can have larger width relative to other dowels 22, is preferably 1.5 ~ 2 times of other dowel 22 width.

Width about dowel 22 is typically chosen in has identical width with connected silver-colored line.

For simplifying structure, in certain embodiments, except drift angle dowel 25, all the other dowels 22 are vertical with interior silver-colored line 21, and structure is simple, and the conductive silver paste amount used is fewer.

In further embodiments, except drift angle dowel 22, all the other dowels 22 are 45 ~ 80 degree with the angle of interior silver-colored line 21, and through checking, effectively can evade the defect of dowel 22 self, the connection defect of dowel 25 self and corresponding silver-colored line is less.

In certain embodiments in order to reduce the defect that dowel 22 is connected with corresponding silver-colored line further, the two ends of described dowel 22 are connector, two ends for dowel 22 are corresponding to be connected with interior silver-colored line 21 and outer silver-colored line 23, wherein connector is configured to even transition corresponding to the both sides at dowel 22 two ends, structure as shown in Figure 5, there is transition arcs 26 in figure, broken string risk can be effectively reduced.

Based on aforesaid shielding line structure, can be widely used in the touch-screen with shielding line 2 structure, current touch-screen is generally provided with shielding line 2 in frame region, and touch-screen is widely used in from smaller screen (several cun of screens) to the types of applications of large-size screen monitors (tens cun of screens), very large to the demand of conductive silver paste, for this reason, based on the shielding line structure of the utility model ad hoc structure, the use amount of conductive silver paste can be effectively reduced, save cost, and decrease taking natural resources.

Claims (10)

1. a shielding line structure, is applied to touch-screen, it is characterized in that, comprising:

Interior silver-colored line (21), is positioned at the frame region of touch-screen;

Outer silver-colored line (23), is centered around the periphery of interior silver-colored line (21); And

Grounding parts, connects described interior silver-colored line (21) and outer silver-colored line (23).

2. shielding line structure according to claim 1, is characterized in that, the width of described interior silver-colored line is 75 ~ 80 μm, the width of outer silver-colored line 75 ~ 85 μm.

3. shielding line structure according to claim 1 and 2, is characterized in that, described interior silver-colored line (21) is 0.8 ~ 1.0mm with the spacing of interior silver-colored line (23).

4. shielding line structure according to claim 1 and 2, is characterized in that, be provided with in order to form the dowel (22) be electrically connected, and the quantity of dowel (22) is no less than 20 between interior silver-colored line (21) and outer silver-colored line (23).

5. shielding line structure according to claim 4, is characterized in that, on interior silver-colored line (21) bearing of trend, arranges a dowel (22) every 8 ~ 20mm.

6. shielding line structure according to claim 4, is characterized in that, described dowel (22) at least comprises drift angle dowel (25), with within the connecting of silver-colored line (21) drift angle and outer silver-colored line (23) corresponding drift angle.

7. shielding line structure according to claim 6, is characterized in that, except drift angle dowel (25), all the other dowels (22) are vertical with interior silver-colored line (21).

8. shielding line structure according to claim 6, is characterized in that, except drift angle dowel (25), all the other dowels (22) are 45 ~ 80 degree with the angle of interior silver-colored line (21).

9. shielding line structure according to claim 4, it is characterized in that, the two ends of described dowel (22) are connector, corresponding and the interior silver-colored line (21) and outer silver-colored line (23) in two ends for dowel (22) is connected, and wherein connector is configured to even transition corresponding to the both sides at dowel (22) two ends.

10. a touch-screen, is characterized in that, have as arbitrary in claim 1-9 as described in shielding line structure.