CN2567661Y

CN2567661Y - Touch panel signal transmission device

Info

Publication number: CN2567661Y
Application number: CN 02234734
Authority: CN
Inventors: 洪荣骏
Original assignee: Young Fast Optoelectronics Co Ltd
Current assignee: Young Fast Optoelectronics Co Ltd
Priority date: 2002-05-08
Filing date: 2002-05-08
Publication date: 2003-08-20
Anticipated expiration: 2012-05-08

Abstract

The utility model relates to a signal transmission device of a touch panel, comprising a plurality of extended conducting parts which are bulged towards outer edges and arranged on an electrically connected edge of a conducting film of the touch panel; the extended conducting parts are arranged slightly in a sawtooth state, and thus respectively provided with different signal transmission areas which are arranged in the non-linear decreasing way from the center position to two end sides along the long direction of arrangement of the extended conducting parts. In addition, the electrically connected edge of the conducting film is overlapped with a silver conducting path arranged in a long foil bar shape; the silver conducting path respectively traverses the extended conducting parts and is electrically connected to the surfaces of the signal transmission areas. Thus in the process of transmission output, signals triggered on the touch panel can all become the output signals consistent with a certain specification not effected by conducting path differences of the signals, via the signal reparation efficiency of the improved signal transmission structure.

Description

A kind of signal conduction device of touch panel

Technical field

The utility model is the signal conduction device of the touch panel of relevant a kind of adjustable output signal, especially refer to a kind of can be because of different signal conducting paths removes this signal of revisal in the signal transport process, make its this signal of input all can obtain an output signal that meets specific standard from each position of touch panel.

Background technology

Touch panel has become a kind of important input media in recent years, it is widely used in being configured on the display panels such as LCD or cathode-ray tube (CRT), but allow the indication that user's transmission display is shielded on the picture touch desired location, carry out the signal input whereby with finger or nib etc.Touch panel comprises two planar conductive films usually, the subtend configuration to separate certain interval, wherein have at least a conductive film to be set on the flexual transparent membrane, another conductive film then is set at the surface of a hard substrate, between two of subtend configuration, be provided with most planes adhesive tape, play conducting and insulation, and reserve adhesion area coating viscose glue, whereby the two is closely bonded together.

Have on the aforementioned conductive film surface by the conductive materials deposition and lay the conductive layer that forms, indium tin oxide target (in dium tin oxide for example, ITO), and the signal on this conductive film is to see through the electric silver-colored guide passage (silVer-containing conductive electrode) that is connected on lateral edge to be sent to signal processing circuit, for example shown in Figure 1, the signal that the first position P1 is triggered on conductive film T, be sent on the silver-colored guide passage R by the first path D1 with the shortest conduction distance, the first signal input point K1 from this silver guide passage is sent to the line end M of this silver guide passage with signal and exports again, in like manner, the signal that the second position P2 is triggered on this conductive film, to be sent to from the second path D2 of bee-line on this silver guide passage, signal is sent to the line end M of this silver guide passage and exports from the second signal input point K2 again: as can be known by above stated specification, the signal that diverse location triggered on this conductive film, can be sent to follow-up signal processing circuit via different conducting paths, yet, because general silver-colored guide passage is that electricity connects the lateral margin that is configured in aforementioned conductive film with microscler plane chaff, and should itself have higher resistance (impedance) by the silver guide passage, and person known to the crowd, impedance will cause the decay of signal in the conductive process of signal, therefore, as the difference K1 of signal by this silver guide passage, K2 is input to from the process of line end M output, signal will bear the influence of different resistance values and have in various degree decay, particularly on this silver road from output line terminal M position Kx farthest and nearest position Ky, the attenuation degree contrast of the transmission signal between the two is more obvious: consequently, when if the difference of signal attenuation is serious, to in running, have a negative impact to follow-up signal processing circuit: therefore, present most way is in this signal transport process, but remove to carry out the calibration procedure of a revisal signal strength, so that obtain the signal that output one meets specific standard.

In many known signal calibration stepss, have plenty of and adopt the conductive pattern line (conductive ptterns) that is provided with complexity to redistribute signal, or in guide passage, be connected in series extraly the signal correcting circuit with this signal of redistributing of system, to lower this signal uneven phenomenon that in transmission course, decays, wherein, for example United States Patent (USP) the 4th, 293, No. 734 and the 4th, 661, disclosed conductive pattern line methods that are provided with of patent case such as No. 655: as Fig. 2, shown in Figure 3, be to utilize near the edge of this conductive film, to be provided with through the figure of specially designed complexity line electrode, and this figure line electrode has different shapes or length, and be formed on the diverse location of this conductive film: however this known techniques, because the design and the manufacturing technology difficulty of this complicated figure line electrode are higher, and be easy in making production run, error take place, so that produce inaccurate signal calibration result, in addition, at this conductive film edge these complicated conductive pattern lines are set, also will cause the active area of touch panel to be got littler by collapse.In other signal calibration steps, also has plenty of the guide passage that confluxes (Bus-Bar) that a nonparallel sweep (non-parallelcurved lines) style is set with the edge at this conductive film, for example shown in Figure 4, utilize thisly to have the guide passage that confluxes of arc equipotential field (bowed equipotential field) to reach the purpose of signal calibration.Though this known techniques is provided with simply, but the guide passage signal output end becomes narrow confluxing, causing current signal is its major defect by a large amount of consumption, in addition, this curved edge that guide passage presented that confluxes, make the touch panel outward appearance seem very lofty and very not attractive in appearance, and the active area collapse of touch panel is become less.

Summary of the invention

Fundamental purpose of the present utility model provides a kind of signal conduction device of touch panel of adjustable output signal.Be that electric edge fit edge with the conductive film of this touch panel is etched into and has most extension conductive parts, when these extension conductive parts and this silver guide passage electricity are connect, be formed on different electricity and connect the contact area that there are different sizes at the position, provide input signal to this silver guide passage in view of the above through its signal strength of overcorrection, with revisal should the silver guide passage at the different resistance values of each input position, make its signal, all can obtain an output signal that meets specific standard from position input of each of touch panel.

A time purpose of the present utility model provides a kind of signal conduction device that obtains the operations area touch panel that maximum touches.Be to utilize the conductive film edge is etched into the extension conductive part with particular area size, and extend the silver-colored guide passage that conductive part electricity are connected to a microscler chaff shape with these, simplify this silver guide passage configuration design in view of the above, the edge scope that the signal conduction mechanism is set of the panel that touches can be reduced to minimum, comparatively speaking, just can make its touch operation area be amplified the scope of maximum as much as possible, in addition, the silver-colored guide passage that this is straight more can keep all frames of touch panel smooth and attractive in appearance.

A purpose more of the present utility model provides a kind of touch panel signal conduction device of simplifying procedure for producing and reducing production costs, be can be simple and easy by etching method and form required extension conductive part apace at the conductive film edge, and the silver-colored guide passage that the collocation electricity is connected to a simple arrangement of line can produce the effect of signal calibration, compared to other known signal revisal means, have simple structure and be difficult for taking place error, procedure for producing simplification and process advantages such as quick.

In order to reach above-mentioned illustrative purposes, the utility model provides a kind of signal conduction device of touch panel, be that electric edge fit edge at the conductive film of this touch panel forms some extension conductive parts, and be provided with a silver medal guide passage electricity and be connected to these and extend conductive part, and should the silver guide passage be microscler chaff shape configuration linearly and crossed these respectively and extend conductive parts and be overlapped on the surface.

At the formed extension conductive part of electric edge fit edge of this conductive film, be to connect the position and different big or small contacts area are arranged at different electricity, for example, the contact area size of this extension conductive part is to be laid in non-linear mode decrescence by mediad two limit ends.

These outward appearances of extending conductive parts are zigzag profiles of slightly rectangular, trapezoidal, triangle or arc.

These extend conductive part and preferably utilize engraving method to make.

Among the figure, 1 conducting film, 15 extend conductive part, 2 silver medal guide passages, 21 ora terminalis.

Description of drawings

Fig. 1 one touches the planimetric map of face, the running synoptic diagram that the signal that is presented on the conductive film to be triggered is exported via different conducting paths.

Fig. 2 one touches the planimetric map of the conductive film of face, is provided with through specially designed figure line electrode near being presented at the edge of this conductive film.

Fig. 3 is another planimetric map that touches the conductive film of face, show a kind of near the edge of conductive film, be provided with through specially designed figure line electrode.

Fig. 4 is the planimetric map of the conductive film of another touch face, shows that a kind of edge at conductive film is provided with the guide passage that confluxes of a nonparallel sweep style.

Fig. 5 is a partial plan layout of the present utility model, shows the laying on this extension conductive part and this guiding road.

Fig. 6 is the partial plan layout of another embodiment of the present utility model, shows the laying on this extension conductive part and this guiding road.

Fig. 7 is the partial plan layout of an embodiment more of the present utility model, shows the laying on this extension conductive part and this guiding road.

Fig. 8 is the partial plan layout of another embodiment of the present utility model, shows the laying on this extension conductive part and this guiding road.

Embodiment

As shown in Figure 5, in this embodiment, this touch panel is to comprise a transparence conductive film 1 that is configured in substrate B surface, and in the overlapping edges one silver medal guide passage 2 of this conductive film, making the signal of triggering on this conductive film 1 can see through electricity in view of the above is connected on the silver-colored guide passage 2 of side and is sent to follow-up signal processing circuit by its two ora terminalis 21: wherein, electric edge fit edge in this conductive film 1 is provided with the outstanding extension conductive part 15 of some outside lateral margins, making these extend conductive part 15 arranges with the state that omits indentation, be formed on each extension conductive part 15 and have different signal delivery area A x respectively, this for example, the size of these signal delivery areas is vertical with what be provided with along these extension conductive parts, and is laid in non-linear mode decrescence to two end limits by central part.In addition, this silver guide passage 2 is microscler chaff shape configurations linearly, and crosses these respectively and extend conductive parts 15 and the lapping electricity is connected on the surface of this signal delivery area A x.

The conductive layer of aforementioned this conductive film 1 is that material is deposited forms by indium tin oxide target (ITO), so at its electric edge fit edge these extension conductive parts 15 being set can reach by engraving method, this etching and processing operation is that part coating (or printing) one deck that on this conductive film surface desire is kept earlier blocks the coating of erosion, again this conductive film is immersed in the etching solution, for example hydrochloric acid or salpeter solution, get rid of the part of on this conductive film, not wanting by etching then, only keep required predetermined portions.

And it is known to the public, the resistance value that is suffered in the signal conductive process slightly amasss with conductive cross-section and is the functionality direct ratio, and with the conduction stroke be the functionality inverse ratio, therefore by the characteristic of this conductive film 1 and these silver guide passage 2 each tool impedances, when the signal transmitting construction of this touch panel operates, be to utilize this extension conductive part 15 to establish to have different big or small signal delivery area A x at each position of conductive film, make the signal that is triggered on this conducting film 1 when being sent to each this extension conductive part 15, suffer the resistance value of different sizes, that is, signal on this extension conductive part is to have bigger signal strength at position, two end limits at central part at this moment, then, these will be imported into silver-colored guide passage 2 and be sent to its two ora terminalis 21 and export extending signals on the conductive part 15, when this signal transmits on this silver guide passage 2, also will suffer the resistance value of different sizes because of the conduction stroke of going through different length, produce signal strength decay in various degree, that is, from the signal of central part input to two ora terminalis 21 because have long conduction stroke, therefore will bear bigger impedance and produce more strength retrogression.In sum as can be known, the utility model is etched into the extension conductive part that several have different conduction surface sizes by the electric edge fit edge at conductive film, so that the different electricity of this silver guide passage is connect the signal that the position provides a corrected strength, come revisal should the silver guide passage at the different resistance values of each input position, in other words, be that the signal that triggers from each of touch panel position is transmitted and the process of output signal through aforementioned signal transmitting construction, cause at each different signal conducting path and all have identical or approximate resistance value, even also signal has the decay of same degree, therefore all can obtain an output signal that meets specific standard, reach the purpose of signal calibration.

In addition, the utility model improves through aforementioned innovation, can the edge scope that the signal conduction mechanism is arranged that touch panel is set be reduced to minimum, make its touch operation area maximum magnitude that increases, also can make this straight silver-colored guide passage more can keep all frames smooth and attractive in appearance of touch panel.Moreover, the utility model is done by etching method can be simple and easy and form required extension conductive part apace at the conductive film edge, and the collocation electricity is connected to the effect that a simple rectilinear silver-colored guide passage can produce the signal calibration, compare and desire other known signal revisal means, have simple structure and be difficult for taking place error, procedure for producing simplification and process advantages such as quick.

The utility model is not limited to the above form, clearly, with reference to above-mentioned explanation, more improvement and variation can be arranged, for example, these extend the outward appearance of conductive parts, except that as the rectangle zigzag that in Fig. 1, is represented, in other checking that can put into practice, also can be set up the sawtooth profile that is trapezoidal, triangle or arc (as Fig. 2-shown in Figure 4) ...So all have any modification or a change of being done identical with the utility model under same case, all should be included in the protection category of the present utility model.

Claims

1, a kind of signal conduction device of touch panel, it comprises a transparence conductive film that is configured in substrate surface, and in the overlapping edges one silver medal guide passage of this conductive film, making the signal of triggering on this conductive film can see through electricity is connected on the silver-colored guide passage of side and is sent to follow-up signal processing circuit by its two ora terminalis, it is characterized in that: the electric edge fit edge in this conductive film is provided with the outstanding extension conductive part of some outside lateral margins, be formed on each and extend the signal delivery areas that conductive part has different sizes respectively, and should the silver guide passage be microscler chaff shape configuration linearly and crossed these respectively and extend conductive parts and the lapping electricity is connected on the surface of this signal delivery area.

2, the signal conduction device of touch panel according to claim 1 is characterized in that: these extend conductive parts with the state arrangement of the indentation slightly electric edge fit edge at this conductive film.

3, the signal conduction device of touch panel according to claim 1 is characterized in that: the size of these signal delivery areas is to extend vertical that conductive part is provided with along these, and is laid in non-linear mode decrescence to two end limits by central part.