CN201489506U

CN201489506U - Capacitive touch panel

Info

Publication number: CN201489506U
Application number: CN2009201624609U
Authority: CN
Inventors: 吴贤行; 黄炳文; 谢其铭; 吕世仲; 吴明坤
Original assignee: Wintek Corp
Current assignee: Wintek Corp
Priority date: 2009-07-30
Filing date: 2009-07-30
Publication date: 2010-05-26
Anticipated expiration: 2019-07-30

Abstract

The utility model discloses a capacitance touch panel, including being a plurality of first electrode group and a plurality of second electrode group that set up perpendicularly, each first electrode group has a plurality of first transparent electrodes and connects the conducting wire of two adjacent first transparent electrodes, each second electrode group has a plurality of second transparent electrodes, and conducting wire and two adjacent second transparent electrodes are equipped with a node between, the node contains that each conducting wire periphery cladding has a transparent insulation layer, be equipped with an electrostatic protection circuit who connects two adjacent second transparent electrodes on the transparent insulation layer surface, electrostatic protection circuit surface is equipped with a metal wire, and the metal wire both ends are not connected with two adjacent second transparent electrodes; the transmission of the electronic signal through the second electrode set needs to pass through the electrostatic protection circuit and then pass through the metal wire, thereby increasing the electrostatic protection of the metal wire.

Description

Capacitance type touch-control panel

Technical field

The utility model is about a kind of contact panel, is meant a kind of being arranged between sensing electrode in order to prevent the capacitance type touch-control panel of electrostatic breakdown especially.

Background technology

The application of contact panel is very extensive, personal digital assistant (Personal DigitalAssistant for example, PDA), GPS (Global Positioning system, GPS), visitor's guide system, ATM (Automatic Teller Machine), point-of-sale terminals, industrial control system etc.Because these interfaces are easy to use, durable in use, and cost is not high, so market is still in continuing growth.

Contact panel can be detected the physical principle of touch point according to it, and is divided into three kinds: resistance-type, condenser type and fluctuation formula; Wherein, resistance-type system uses the contact flicking of finger or other object to produce voltage, condenser type system is with the variation of light finger pressure with the generation capacitance, and fluctuation formula system covers whole surface with sound wave or infrared ray, blocks these standing wave patterns with the contact of finger or object again.

Please refer to Fig. 5 and Fig. 6, represent the part front elevation of known capacitance type touch-control panel and the part front elevation of electrostatic breakdown safeguard structure thereof respectively.For capacitance type touch-control panel, between each the two electrode X1 on the two-dimensional directional (X-axis and Y-axis), X2, Y1, Y2, be provided with metallic circuit M1, M2, wherein interelectrode in the horizontal direction metallic circuit is the cross-over connection mode, and because the width of metallic circuit M2 is little, promptly open circuit because of electrostatic breakdown causes easily (as shown in Figure 5); And, promptly strengthen the width of cross-over connection metallic circuit M2 in order to prevent electrostatic breakdown, to reach the purpose (as shown in Figure 6) that prevents electrostatic breakdown; But the thickness that strengthens metallic circuit can make impedance increase, and causes Yu Ying to enlarge, and not only influences show image, influences display quality especially.

The utility model content

Therefore, for addressing the above problem, the purpose of this utility model is to provide a kind of electrostatic breakdown safeguard structure, be arranged on the vertical direction of capacitance type touch-control panel and the staggered place of parallel direction electrode and be provided with the electrostatic defending circuit, use the problem that reaches electrostatic protection effect and reduce surplus shadow.

So to achieve these goals, the utility model provides a kind of capacitance type touch-control panel, it is to comprise:

A plurality of first electrode groups that are arranged in parallel, this first electrode group of each group is provided with a plurality of spaced first transparency electrodes respectively, and a plurality of conducting wire that is linked to each first transparency electrode;

A plurality of second electrode groups that are arranged in parallel, those second electrode groups are provided with perpendicular to those first electrode groups, and this second electrode group is provided with a plurality of spaced second transparency electrodes respectively, is the matrix-style arrangement for those first transparency electrodes and those second transparency electrodes;

A plurality of nodes, this node is formed at respectively between this conducting wire and adjacent two first transparency electrodes, those nodes are coated with a transparent insulating layer respectively at this conducting wire periphery, and the one side that those transparent insulating layers differ from those conducting wires is respectively equipped with an electrostatic defending circuit, those electrostatic defending circuits are connected to the two second adjacent transparency electrodes, and be respectively equipped with a metallic circuit in the surface of those electrostatic defending circuits, and those metallic circuits are not connected with this transparent induction electrode, and the electrical impedance of those metallic circuits is less than those electrostatic defending circuits.

Purpose that the utility model is above-mentioned and advantage are not difficult to obtain to understand in depth from the detailed description and accompanying drawing of following selected embodiment.

Certainly, the utility model is at some in addition on part, or allows in the arrangement of part differently in addition, but selected embodiment then in this instructions, described in detail, and shows its structure in accompanying drawing.

Description of drawings

Fig. 1 represents that the utility model is applied in the stereo appearance figure of personal digital assistant.

Fig. 2 represents the front elevation of the utility model capacitance type touch-control panel.

Fig. 3 represents the wherein front elevation at a node place of the utility model capacitance type touch-control panel.

Fig. 4 represents the wherein phantom view at a node place of the utility model capacitance type touch-control panel.

Fig. 5 represents the part front elevation of known capacitance type touch-control panel.

Fig. 6 represents the part front elevation of the electrostatic breakdown safeguard structure of known capacitance type touch-control panel.

Symbol description

1 personal digital assistant, 11 shells

13 control zones, 12 viewing areas

14 articulating regions, 2 capacitance type touch-control panels

3 substrates, 4 first electrode groups

40 conducting wires, 41 first transparency electrodes

5 second electrode groups, 51 second transparency electrodes

61 transparent insulating layers, 62 electrostatic defending circuits

63 metallic circuits, 7 protective clear layers

8 flexible circuit boards, 81 circuits

9 transparent screen layer M1 metallic circuits

M2 metallic circuit P node

P1 node W1 first width

W2 second width X second direction (horizontal direction) touch coordinate

X1 electrode X2 electrode

Y first direction (vertical direction) touch coordinate Y1 electrode

The Y2 electrode

Embodiment

Please refer to Fig. 1, is the stereo appearance figure that expression the utility model is applied in personal digital assistant.Personal digital assistant 1 is to comprise a shell 11, a viewing area 12, a control zone 13 and an articulating region 14, and capacitance type touch-control panel of the present utility model 2 is arranged on viewing area 12, the operation of importing in the touching mode for the user.

Please refer to Fig. 2, Fig. 3 and Fig. 4, is to represent the front elevation of the utility model capacitance type touch-control panel, the wherein front elevation and the phantom view at a node place respectively.Capacitance type touch-control panel 2 of the present utility model comprises a substrate 3, a plurality of first electrode group 4, a plurality of second electrode group 5, a plurality of node P and protective clear layer 7.

Substrate 3 is a transparent material, for example: and glass substrate, eyeglass (Lens) or be colored filter, and the periphery of substrate 3 more can be provided with a transparent screen layer 9 of metal material, and its effect is the electromagnetic interference (EMI) in order to prevent that perimeter circuit from producing.

Each first electrode group 4 is to arrange in parallel to each other and be arranged on substrate 3 surfaces towards a first direction, and the utility model is to be that first direction describes with the vertical direction.Each first electrode group 4 is to have a plurality of first transparency electrodes 41 and a plurality of conducting wire 40 (as shown in Figure 3) that is linked to each first transparency electrode 41, conducting wire 40 is in order to connect 2 first adjacent transparency electrodes 41, its material is to can be molybdenum, aluminium, chromium or its oxide or alloy, and the material of first transparency electrode 41 is to be tin indium oxide (ITO) or indium zinc oxide (IZO), and the first transparent induction electrode 41 of each first electrode group 4 is one-body moldedly to be made in substrate 3 surfaces with conducting wire 40; When the user carries out input operation in the touching mode, detect a first direction (vertical direction) touch coordinate Y with each first transparency electrode 41.

Each second electrode group 5 is to arrange in parallel to each other and be arranged on substrate 3 surfaces towards a second direction, and the utility model is to be that second direction describes with the horizontal direction.Each second electrode group 5 is to have a plurality of second transparency electrodes 51, and the material of second transparency electrode 51 is to be tin indium oxide (ITO) or indium zinc oxide (IZO); When the user carries out input operation in the touching mode, detect a second direction (horizontal direction) touch coordinate X with each second transparency electrode 51.

Moreover, each first transparency electrode 41 and each second transparency electrode 5 can be an a rhombus (or parallelogram, but not as limit), so, can design the size of the first electrode group 4 according to the size of Touch Screen, and the catercorner length of the adjustment first electrode group 4, so that the first electrode group 4 can meet the size of Touch Screen fully, make the second electrode group 5 can be flexibly set in the both sides of the first electrode group 4 according to different circuit layouts.

Owing to each first electrode group 4 is to be arranged on substrate 3 surfaces in the arranged mode with each second electrode group 5, therefore each first electrode group 4 is to form a plurality of node P with each the second electrode group, 5 staggered place, that is node P is formed between conducting wire 40 and adjacent two first transparency electrodes 41.

Node P includes a transparent insulating layer 61, an electrostatic defending circuit 62 and a plurality of metallic circuit 63; Present embodiment is to be that example describes with node P1 and 2 first adjacent transparency electrodes 41 with 2 second transparency electrodes 51 that link to each other.

Transparent insulating layer 61 is to be provided with to be coated on conducting wire 40 peripheries at least, be that transparent insulating layer 61 can only be coated on conducting wire 40 peripheries, maybe can form whole face and be layed in the first electrode group, second electrode group and the substrate surface, and being completely cut off 2 second transparency electrodes 51 that each conducting wire is adjacent, the material of transparent insulating layer is to can be silicon dioxide (SiO ₂) or organic material.

Electrostatic defending circuit 62 is arranged on transparent insulating layer 61 surfaces, and connects 2 second adjacent transparency electrodes 51, and the material of electrostatic defending circuit 62 is to can be tin indium oxide (ITO) or indium zinc oxide (IZO), and electrostatic defending circuit 62 has one first width W 1.

Metallic circuit 63 is arranged on electrostatic defending circuit 62 surfaces, its material is identical with the material of conducting wire 40, can be molybdenum, aluminium, chromium or its oxide or alloy, and each metallic circuit 63 does not contact with adjacent second transparency electrode 51, being that each metallic circuit has one second width W 2, is first width W 2 less than electrostatic defending circuit 62.

Owing to have electrostatic defending circuit 62 to connect 2 second adjacent transparency electrodes 51, and first width W 1 of electrostatic defending circuit 62 is greater than second width W 2 that is arranged on its surperficial metallic circuit 63, do not contact with adjacent second transparency electrode 51 for each metallic circuit 63; Therefore; when capacitance type touch-control panel 2 energising runnings; need when the second electrode group 5 transmits signal; because electronics is linked to second transparency electrode 51 through electrostatic defending circuit (ITO) 62; and electrostatic defending circuit 62 differs very big with the impedance of metallic circuit 63; thereby make that electronics can be via second transparency electrode 51; jump directly to metallic circuit 63; with the position (being electrostatic defending circuit 62 and conducting wire 40 intervening portions) of avoiding electrostatic defending circuit 62 most fragiles; be connected to the end in addition of electrostatic defending circuit 62 again via metallic circuit 63; conduction causes another second transparency electrode 51; use the defencive function that reaches with tin indium oxide (ITO) electrostatic prevention; simultaneously can avoid strengthening metallic circuit 63, avoid the generation of Yu Ying.

Moreover; be provided with protective clear layer 7 in each first electrode group 4, each second electrode group 5 with each electrostatic breakdown safeguard structure 6 surface; be to be provided with protective clear layer 7 in order to each first electrode group 4 of protection, each second electrode group 5 with each electrostatic breakdown safeguard structure 6, its material is to can be silicon dioxide (SiO ₂) or organic material.

In addition, capacitance type touch-control panel 2 of the present utility model more comprises a flexible circuit board 8, has many circuits 81 to connect each first electrode group 4, each the second electrode group 5 and transparent screen layer 9.

The above announcement of implementing kenel is in order to explanation the utility model, is not in order to restriction the utility model, so the displacement of the change of numerical value or equivalent elements must be subordinate to category of the present utility model such as.

Claims

1. A capacitive touch panel, characterized in that, comprising:

A plurality of first electrode groups arranged in parallel, each group of the first electrode group is respectively provided with a plurality of first transparent electrodes arranged at intervals, and a plurality of conductive lines connected to each first transparent electrode;

A plurality of second electrode groups arranged in parallel, the second electrode groups are arranged perpendicular to the first electrode groups, and the second electrode groups are respectively provided with a plurality of second transparent electrodes arranged at intervals for the first electrode groups A transparent electrode and the second transparent electrodes are arranged in a matrix; and

A plurality of nodes, the nodes are respectively formed between the conductive circuit and two adjacent first transparent electrodes, and the outer periphery of the conductive circuit is coated with a transparent insulating layer on the nodes, and the transparent insulating layers are different from the One side of the conductive circuit is respectively provided with a static protection circuit, and these static protection circuits are respectively connected to two adjacent second transparent electrodes, and a metal circuit is respectively provided on the side of these static protection circuits different from the transparent insulating layer, and these static protection circuits are respectively provided with a metal circuit. The metal lines are not connected to the second transparent sensing electrodes, and the electrical impedance of the metal lines is smaller than the static electricity protection lines.

2. The capacitive touch panel according to claim 1, wherein the metal lines have a first width, and the electrostatic protection line has a second width, and the first widths are less than or equal to the The second widths are used for the metal lines to be formed in the surface of the second electrostatic protection lines.

3. The capacitive touch panel according to claim 1, wherein the transparent insulating layer is laid on the entire surface of the first electrode groups, the second electrode groups and the surface of the substrate, and the static electricity The protection lines respectively pass through the opposite transparent insulating layers to connect to two adjacent second transparent sensing electrodes.

4. The capacitive touch panel according to claim 1, wherein the conductive circuit is a metal wire.

5 . The capacitive touch panel according to claim 1 , wherein a transparent protection layer is provided on the substrate, the first electrode groups and the second electrode groups.

6. The capacitive touch panel according to claim 1, wherein the first transparent electrode groups, the second transparent electrode groups and the electrostatic protection circuits are made of indium tin oxide or indium zinc oxide .

7. The capacitive touch panel according to claim 1, wherein the metal circuit is made of molybdenum, aluminum, chromium, or an oxide or alloy thereof.

8 . The capacitive touch panel according to claim 1 , wherein the first transparent electrodes, the second transparent electrodes and the electrostatic protection circuits are made of indium tin oxide or indium zinc oxide.

9. The capacitive touch panel according to claim 1, characterized in that it comprises a flexible circuit board, the flexible circuit board has a plurality of lines, and is respectively connected to the first electrode groups, the second electrode groups Two electrode groups and the transparent shielding layer.

10. The capacitive touch panel according to claim 1, wherein the substrate is a glass substrate, a lens or a color filter.