CN101261379A - Capacitance type touch screen and touch display devices containing the touch screen - Google Patents

Abstract

The invention discloses a capacitive touch screen and a touch display device which comprises the touch screen. The capacitive touch screen comprises a transparent substrate and a transparent electrode. The capacitive touch screen is characterized in that: the transparent substrate is one piece; the transparent electrode is two or more than two groups of transparent electrodes with every group of the transparent electrode arranged at the same surface of the transparent substrate, isolated and insulated from each other and arranged alternately and regularly. The capacitive touch screen of the invention can realize the goal that a plurality of electrodes of the touch screen is arranged at the same surface of the same substrate with simple manufacturing method and low cost.

Description

Capacitive touch screen and comprise the touch display spare of this touch-screen

Technical field

The present invention relates to capacitive touch screen and comprise the touch display spare of this touch-screen.

Background technology

Touch-screen is present simple, convenient, the most natural input equipment, and that touch-screen has is sturdy and durable, reaction velocity fast, the saving space, be easy to many advantages such as interchange.Utilize this technology, the user can be directly on the display device surface that is added with touch-screen by pointing out or hand-written mode input information, thereby make man-machine interaction more simple and direct, more friendly than input equipments such as mouse-keyboards, convenient.Therefore be used in more and more widely on the various portable sets, as mobile phone, PDA etc.This man-machine interaction mode, it has given multimedia with brand-new looks, is extremely attractive brand-new multimedia interactive equipment.The making of touch panel display device of the prior art mainly be the touch-screen finished product that will separately produce and display device finished product column together, assembling is the two-sided sticking or optical cement connection of general use between them, gapped or optical cement between touch panel and the lcd screen causes transmitance to reduce like this.

Existing touch screen technology is of a great variety, according to use contactant type, confirm the difference of contact position mode, touch screen technology has can be divided into resistance-type, condenser type, infrared, surface wave etc., wherein mainly adopts four-wire resistance type, inductance capacitance formula in the mobile phone application facet.Touch-screen finished product as shown in Figure 1 is a resistive touch screen, it comprises upperstrata transparency carrier 11 and lower floor'stransparency carrier 16, silk-screen electrode 12 is arranged on top substrate layer, on the laminar substrate silk-screen electrode 15 is being arranged equally down, this two-layer electroded transparency carrier is combined bybinder 13, in a certain distance apart from one another, there is thedot interlace 14 of a layer scattering centre, play a supportive role, two-layer contact up and down causes the touch-screen misoperation when preventing from not touch.Electroded surface ontransparency carrier 11 and thetransparency carrier 16 is as two groups of workplaces of resistive touch screen.When touch screen, toptransparent electrode 12 produces deformation, contacts with lower floor'stransparency electrode 15, and touch-screen is started working.According to upper/lower electrode 12,15 separately the variation of electromotive force judge touch point position.

For inductance capacitance formula touch-screen, usually on two groups of planes of substrate 22, transparent electrodes conductlayer 21,23 is set as Fig. 2 as workplace, or on twoplate bases 31,34, transparentelectrodes conduct layer 32,33 is set respectively as workplace as Fig. 3, when pointing near the electrodes conduct layer, because people's bulk electric field, user's finger and electrodes conduct layer form a coupling capacitance, so there is the stray capacitance that has changed electrode in finger, controller is by obtaining the electric capacity change amount of each electrode, and COMPREHENSIVE CALCULATING draws touch point position.

Yet, existing touch-screen, no matter be four-wire resistance type or the inductance capacitance formula, all can only adopt two arrays of electrodes at least is made on the face of two planes of same plate base or two different substrates, all two arrays of electrodes can't be made on the same plane of same plate base.Assembling is IC the time like this, especially for inductance capacitance formula TP, flexible circuit board (FPC) assembling of hot pressing simultaneously on the two sides of same plate base or two plate bases can't must be realized the COG encapsulation; And can't utilize certain substrate of LCD display to do touch-screen when making final touch-screen product, must increase an other substrate at least in addition again and do touch-screen.Rainbow, Newton ring problem that two-sided binding FPC causes real estate out-of-flatness or electric capacity TP two plate base applying out-of-flatnesses itself to cause, electrode again can be owing to the ITO reflection of upper and lower surface and the difference of refractive index on two groups of planes, see defectives such as ITO pattern ghost easily in vision area the inside, and the sensitivity of two groups of plane top electrodes is inconsistent up and down.The increase that above defective is not only very big the cost of touch-screen product, also be difficult to satisfy and now flat-panel monitor pursued ultra-thinization trend demand.

Summary of the invention

One of purpose of the present invention provides a kind of capacitive touch screen, and this touch-screen can be realized the multi-group electrode of touch-screen is made on the same plane of same plate base, and method for making is simple, and cost is low.

First purpose of the present invention realizes by following technical solution: a kind of capacitive touch screen, comprise transparency carrier and transparency electrode, described transparency carrier is one, described transparency electrode is two groups or more transparency electrode, each is organized on the same surface that transparency electrode all is arranged on this transparency carrier, and separation insulated from each other, well-regulated alternative arrangement.

The present invention all is arranged on the transparency electrode of the many groups in the touch-screen on the same surface of transparency carrier, only need a transparency carrier can realize carrying the function of many group transparency electrodes, make product structure light and handy and reduce production costs, transparency electrode can be two groups or three groups or many groups.

Transparency electrode of the present invention is two groups, two groups of transparency electrodes are respectively along horizontal and vertical even setting on the transparency carrier face, each is organized electrode and is formed by connecting by a plurality of cell electrode, the cell electrode of one of them direction is distributed in the void area between the cell electrode of another direction, be installed with separation gap or insulation course mutually between each vertical cell electrode and each lateral cell electrode, horizontal and vertical staggered place is provided with collets.

Transparency electrode among the present invention can adopt following arrangement mode: continuous shape distributes described horizontal transparency electrode and laterally continuous successively cell electrode is formed by being, shape distributes described vertical transparency electrode and cell electrode independent of each other is formed by being vertically continuously, the every vertically adjacent cell electrode of described vertical transparency electrode is by the cross-over connection of conducting block phase, and each conducting block strides across the staggered place of horizontal transparency electrode and laterally is provided with collets between the transparency electrode.

Transparency electrode among the present invention also can adopt following arrangement mode: continuous shape distributes described vertical transparency electrode and laterally continuous successively cell electrode is formed by being, shape distributes described horizontal transparency electrode and cell electrode independent of each other is formed by being vertically continuously, the every laterally adjacent cell electrode of described horizontal transparency electrode is by the cross-over connection of conducting block phase, and each conducting block strides across the staggered place of vertical transparency electrode and vertically is provided with collets between the transparency electrode.

Transparency electrode among the present invention is three groups, each is organized electrode and is formed by connecting by a plurality of same unit electrodes, wherein three groups of electrodes is crisscross arranged that to form a regular hexagon with three cell electrode of different groups be rule, tired successively folded, be provided with between the cell electrode of each group and separate insulation course mutually, be provided with collets between the cell electrode staggered place of each group.

The shape of described each cell electrode is the diamond block structure, and the corresponding junction of each cell electrode is located between the dicing.

The described transparency electrode of respectively organizing is directly extended or is drawn to the same edge of described transparency carrier through conductor wire.

The multi-group electrode of drawing from the same edge of transparency carrier adopts the mode of COG or FPC to be connected with the touch-screen chip for driving, perhaps the chip for driving with touch-screen is integrated among the IC of display, and the multi-group electrode of described touch-screen is connected on the IC of display with FPC.

Described transparency carrier material is the glass or the transparent film; Described transparent electrode material is tin indium oxide (ITO) or indium zinc oxide (IZO).

Described conducting block material is tin indium oxide (ITO) or indium zinc oxide (IZO); Described collets material is silicon dioxide or silicon nitride or polyamides.

Two of purpose of the present invention provides the method for making of above-mentioned capacitive touch screen.

Second purpose of the present invention realizes by following technical solution: the method for making of capacitive touch screen, be included in the process of making electrode on the transparency carrier, and it is characterized in that the process of making electrode is:

(a) on the same plane of transparency carrier with the transparency electrode of MASK sputter or harsh touch-screen, make and respectively organize transparency electrode and be interspersed on the same plane of transparency carrier;

(b) each the group transparency electrode cell electrode between and each conducting block cross-over connection staggered place insulation course is set;

(c) cross-over connection of conducting block phase is set between each cell electrode with the group transparency electrode.

Three of purpose of the present invention provides the touch display spare that comprises above-mentioned capacitive touch screen.

The 3rd purpose of the present invention realizes by following technical solution: a kind of touch display spare that comprises aforesaid capacitive touch screen.

It is bonding that the transparency carrier of described touch-screen is provided with the upper substrate of the face of two groups or more electrode and display device.Perhaps the upper substrate of the back side of the transparency carrier of described touch-screen and display device is bonding, and transparency carrier is provided with on the face of two groups or more electrode polaroid is set.In the touch display spare of the present invention, all be that pure substrate does not have other material at the fitting surface of touch-screen and display device, assembling easily, touch face has only one deck polaroid or diaphragm, and response speed is fast.

The transparency carrier of described touch-screen is as the upper substrate of display device, and the transparency carrier back side of touch-screen makes the electrode of display device, and transparency carrier is provided with on the face of multi-group electrode polaroid is set.Adopt the touch display spare of said structure, with a substrate of display device directly as the substrate of touch-screen, can in the electrode pattern of making display, make the electrode pattern of touch-screen simultaneously, reduce processing procedure, not only reduce the thickness that cost has also reduced last touch display spare greatly, satisfied the requirement of ultra-thinization of flat pannel display.

Compared with prior art, the present invention has following remarkable result:

1) several groups of electrodes conduct layers that capacitive touch screen of the prior art is required are made on the same plane, so only need be on a plane of a plate base sputter transparency electrode, the harsh several groups of required electrodes of touch-screen that just can make of while.Compared with prior art, reduced by a plate base, lacked one group of harsh processing procedure of electrode sputter, made simply, saved cost greatly.

2) capacitive touch screen of the present invention and LCD are made simultaneously, this touch-screen can also be made on the upper substrate of LCD display, the thickness of the last touch-screen display of Jiang Diing greatly, reduced the gap between one deck touch screen base plate and the substrate simultaneously, reduced the loss of the reflection in the space of light between display device and touch-screen, increased the transmitance of light, can reduce the power consumption of product, can not exist between touch-screen and the display screen because touch-screen and display screen are separately made to fit together the deviation that is occurred again.

3) method for making of this capacitive touch screen can also realize the encapsulation of glass top chip (COG) mode, and this point has compared with prior art had very big breakthrough, not merely is embodied on the cost, and can produce because the defective that the baseplate-laminating out-of-flatness causes.The also easier realization of touch-screen display of the method making simultaneously integrates the drive integrated circult (IC) of touch-screen and the drive integrated circult (IC) of display device, simplifies working process, and reduces cost.

4) touch display spare of the present invention makes the finished product display device thinner than the display device of prior art, is more suitable for being applied on the panel display apparatus such as mobile phone the easier development trend that satisfies ultra-thinization of flat pannel display, cost degradation.

5) touch-screen of the present invention also helps the design that realizes three or multiaxis, realizes that truly multiple spot is surveyed and multiple spot parsing etc.

Description of drawings

Below in conjunction with the drawings and specific embodiments the present invention is described in further details.

Fig. 1 is the synoptic diagram of the resistive touch screen of prior art;

Fig. 2 is the synoptic diagram of a kind of capacitive touch screen of prior art;

Fig. 3 is the synoptic diagram of the another kind of capacitive touch screen of prior art;

Fig. 4 is the embodiment synoptic diagram of capacitive touch screen two arrays of electrodes of the present invention;

Fig. 5 is the explosive view of Fig. 4;

Fig. 6 is the embodiment synoptic diagram of three groups of electrodes of capacitive touch screen of the present invention;

Fig. 7 is the one-piece construction synoptic diagram of touch display spare embodiment one of the present invention;

Fig. 8 is the one-piece construction synoptic diagram of touch display spare embodiment two of the present invention;

Fig. 9 is the one-piece construction synoptic diagram of touch display spare embodiment three of the present invention;

Figure 10 is the one-piece construction synoptic diagram of touch display spare embodiment four of the present invention.

Embodiment

As Fig. 4, Figure 5 shows that the embodiment one of capacitive touch screen of the present invention, it comprises atransparency carrier 41 and two groups oftransparency electrodes 42,43, is two-axis transparency electrode, the transparency carrier material adopts the glass or the transparent film; Two groups of transparent electrode materials adopt tin indium oxide (ITO) or indium zinc oxide (IZO), two groups oftransparency electrodes 42,43 all are arranged on the same surface of thistransparency carrier 41, and it is insulated from each other, well-regulated alternative arrangement, two groups of transparency electrodes are respectively along thehorizontal transparency electrode 42 oftransparency carrier 41 length directions setting and thevertical transparency electrode 43 that is provided with this horizontal transparency electrode vertical direction, laterallytransparency electrode 42 is made up of a plurality of cell electrode 42a that are laterally shape distribution continuously and link to each other successively, the diamond block structure of the structure of this cell electrode 42a for protruding, the cell electrode 42a of this rhombus extends the binding position that is drawn out to transparency carrier edge and drive integrated circult (IC) always, verticallytransparency electrode 43 is by a plurality of that continuous shape vertically distributes and cell electrode 43a independent of each other forms, the structure of this cell electrode 43a is the diamond block structure for protruding also, and contour with the diamond-shaped element electrode 42a ofhorizontal transparency electrode 42.

Be even regular distribution between each vertical transparency electrode and each the horizontal transparency electrode, the corresponding junction of each cell electrode is located between the dicing, each independently vertical cell electrode is distributed in the void area between each lateral cell electrode, be installed with separation gap insulation mutually between each vertical cell electrode and each lateral cell electrode, insulation course perhaps is set.Vertically every vertically adjacent cell electrode is the conductingblock 45 phase cross-over connections of tin indium oxide or indium zinc oxide by material in the transparency electrode, each conductingblock 45 strides across the junction between the horizontaltransparent cell electrode 42, the staggered place is provided with 44 isolation of the thin collets of one deck between each conductingblock 45 and the horizontal transparency electrode, avoid short circuit, thesecollets 44 materials adopt silicon dioxide, also can adopt silicon nitride or polyamides, verticallytransparency electrode 43 is drawn out totransparency carrier 41 same edges and drive integrated circult (IC) binding position by the conductor wire that is connected in vertical transparency electrode two ends again.

The two arrays of electrodes of drawing from the same edge of transparency carrier adopts the mode of COG or FPC to be connected with the touch-screen chip for driving, and perhaps the chip for driving with touch-screen is integrated among the IC of display, and the two arrays of electrodes of touch-screen is connected on the IC of display with FPC.

Present embodiment also can be done following equivalent transformation: vertically continuous shape distributes transparency electrode and laterally continuous successively cell electrode is formed by being, laterally shape distributes transparency electrode and cell electrode independent of each other is formed by being vertically continuously, laterally the every laterally adjacent cell electrode of transparency electrode is by the cross-over connection of conducting block phase, and each conducting block strides across the staggered place of vertical transparency electrode and vertically is provided with collets between the transparency electrode.

The method for making of above-mentioned capacitive touch screen, this method may further comprise the steps:

A, makingtransparency carrier 41;

B, on the same plane oftransparency carrier 41 the sputter transparency electrode, the simultaneouslyhorizontal transparency electrode 42 of harsh touch-screen and verticallytransparency electrode 43, makehorizontal transparency electrode 42 and verticallytransparency electrode 43 be distributed in length and breadth on the same plane oftransparency carrier 41; The shape of above-mentioned each lateral cell electrode 42a and each vertical cell electrode 43a is made as the same diamond-type block structure, is even regular distribution between each vertical transparency electrode and each the horizontal transparency electrode and arranges, by connecting between each cell electrode dicing;

Wherein laterally transparency electrode 42a is formed by connecting by the cell electrode that is continuous shape distribution and laterally link to each other successively, vertically shape distributes transparency electrode 43a and cell electrode independent of each other is formed by being vertically continuously, each independently vertically cell electrode be distributed in vacant zone between each lateral cell electrode, leave the gap insulation of separation mutually between each vertical cell electrode and each lateral cell electrode;

C, every vertically adjacent cell electrode is provided with the cross-over connection of conducting block phase in vertical transparency electrode, each conducting block stride across horizontal transparency electrode and and horizontal transparency electrode between the staggered place collets are set;

Draw at d, one of them edge that horizontal transparency electrode is extended to transparency carrier always, and vertical transparency electrode is drawn to the same edge of above-mentioned transparency carrier by the conductor wire that is connected in vertical transparency electrode two ends.

Be illustrated in figure 6 as the embodiment two of capacitive touch screen of the present invention, different with embodiment one is, transparency electrode in the present embodiment is three groups, be the triple axle transparency electrode, each is organized electrode and is formed by connecting by a plurality of same unit electrodes, wherein three groups ofelectrodes 61,62,63 is crisscross arranged that to form a regular hexagon with three cell electrode of different groups be rule, tired successively folded, be provided with between the cell electrode of each group and separate insulation course mutually, be provided with collets between the cell electrode staggered place of each group.Also can be made as four groups, five groups etc. on demand in the same lip-deep transparency electrode of this transparency carrier, each organizes transparency electrode separation insulated from each other, well-regulated alternative arrangement.

Figure 7 shows that the present invention adopts the one-piece construction synoptic diagram of the touch display spare embodiment one of above-mentioned capacitive touch screen making, this touch display spare 51 comprises capacitive touch screen, display device, wherein, display device comprisesupper substrate 52,infrabasal plate 53, precedingpolaroid 54 andback polaroid 55, drive integratedcircult 57 is arranged on thetransparency carrier 41 of touch-screen, thetransparency carrier 41 of touch-screen is bonding bybinder 56 with theupper substrate 52 of touch display spare, and bonding plane andtransparency electrode 42,43 faces that are arranged on thetransparency carrier 41 are with one side, beforepolaroid 54 stick on the another side oftransparency carrier 41 of touch-screen,infrabasal plate 53 andupper substrate 52 are bonding, and the gap is left in the centre, andback polaroid 55 sticks on the lower surface ofinfrabasal plate 53.

Figure 8 shows that the one-piece construction synoptic diagram of touch display spare embodiment two of the present invention, different with embodiment one is, touch-screen and the bindings bit of drive integrated circult (IC) 57 and the bindings bit of display device are staggered, easier like this touch-screen and display device are assembled, improve yields and reduce cost.

Figure 9 shows that the one-piece construction synoptic diagram of touch display spare embodiment three of the present invention; this touch display spare 51 comprises capacitive touch screen; display device; wherein; display device comprisesupper substrate 52;infrabasal plate 53; precedingpolaroid 54 andback polaroid 55; drive integratedcircult 57 is arranged on thetransparency carrier 41 of touch-screen; thetransparency carrier 41 of touch-screen is bonding bybinder 56 with theupper substrate 52 of touch display spare; and bonding plane andtransparency electrode 42; 43 faces that are arranged on thetransparency carrier 41 are opposite face; precedingpolaroid 54 sticks on thetransparency electrode 42 of touch-screen; on 43; precedingpolaroid 54 also has the function of diaphragm simultaneously;infrabasal plate 53 andupper substrate 52 are bonding; and the gap is left in the centre, andback polaroid 55 sticks on the lower surface ofinfrabasal plate 53.

Figure 10 shows that the one-piece construction synoptic diagram of touch display spare embodiment four of the present invention, different with embodiment three is, the transparency carrier of touch-screen that is to say theupper substrate 52 of touch display spare among this embodiment, both unite two into one, the transparency carrier back side of touch-screen makes the electrode of display device, and transparency carrier is provided with on the face of two arrays of electrodes polaroid is set.This embodiment can be made the electrode pattern of touch-screen simultaneously in the electrode pattern of making display, reduce processing procedure.

Embodiments of the present invention are not limited thereto, according to foregoing of the present invention, according to the ordinary skill knowledge and the customary means of this area,, can also make modification, replacement or the change of other various ways not breaking away under the above-mentioned basic fundamental thought of the present invention prerequisite.

Claims (15)

1, a kind of capacitive touch screen, comprise transparency carrier and transparency electrode, it is characterized in that: described transparency carrier is one, described transparency electrode is two groups or more transparency electrode, each is organized on the same surface that transparency electrode all is arranged on this transparency carrier, and separation insulated from each other, well-regulated alternative arrangement.

2, a kind of capacitive touch screen according to claim 1, it is characterized in that: described transparency electrode is two groups, two groups of transparency electrodes are respectively along horizontal and vertical even setting on the transparency carrier face, each is organized electrode and is formed by connecting by a plurality of cell electrode, the cell electrode of one of them direction is distributed in the void area between the cell electrode of another direction, be installed with separation gap or insulation course mutually between each vertical cell electrode and each lateral cell electrode, horizontal and vertical staggered place is provided with collets.

3, a kind of capacitive touch screen according to claim 2, it is characterized in that: continuous shape distributes described horizontal transparency electrode and laterally continuous successively cell electrode is formed by being, shape distributes described vertical transparency electrode and cell electrode independent of each other is formed by being vertically continuously, the every vertically adjacent cell electrode of described vertical transparency electrode is by the cross-over connection of conducting block phase, and each conducting block strides across the staggered place of horizontal transparency electrode and laterally is provided with collets between the transparency electrode.

4, a kind of capacitive touch screen according to claim 2, it is characterized in that: continuous shape distributes described vertical transparency electrode and laterally continuous successively cell electrode is formed by being, shape distributes described horizontal transparency electrode and cell electrode independent of each other is formed by being vertically continuously, the every laterally adjacent cell electrode of described horizontal transparency electrode is by the cross-over connection of conducting block phase, and each conducting block strides across the staggered place of vertical transparency electrode and vertically is provided with collets between the transparency electrode.

5, a kind of capacitive touch screen according to claim 1, it is characterized in that: described transparency electrode is three groups, each is organized electrode and is formed by connecting by a plurality of same unit electrodes, wherein three groups of electrodes is crisscross arranged that to form a regular hexagon with three cell electrode of different groups be rule, tired successively folded, be provided with between the cell electrode of each group and separate insulation course mutually, be provided with collets between the cell electrode staggered place of each group.

6, according to claim 3 or 4 or 5 described capacitive touch screens, it is characterized in that: the shape of described each cell electrode is the diamond block structure, and the corresponding junction of each cell electrode is located between the dicing.

7, according to claim 1,2,3,4 or 5 described capacitive touch screens, it is characterized in that: the described transparency electrode of respectively organizing is directly extended or is drawn to the same edge of described transparency carrier through conductor wire.

8, capacitive touch screen according to claim 7, it is characterized in that: the multi-group electrode of drawing from the same edge of transparency carrier adopts the mode of COG or FPC to be connected with the touch-screen chip for driving, perhaps the chip for driving with touch-screen is integrated among the IC of display, and the multi-group electrode of described touch-screen is connected on the IC of display with FPC.

9, capacitive touch screen according to claim 1 is characterized in that: described transparency carrier material is the glass or the transparent film; Described transparent electrode material is tin indium oxide (ITO) or indium zinc oxide (IZO).

10, according to claim 3 or 4 or 5 described capacitive touch screens, it is characterized in that: described conducting block material is tin indium oxide (ITO) or indium zinc oxide (IZO); Described collets material is silicon dioxide or silicon nitride or polyamides.

11, the method for making of capacitive touch screen according to claim 1 is included in the process of making electrode on the transparency carrier, it is characterized in that the process of making electrode is:

(a) on the same plane of transparency carrier with the transparency electrode of MASK sputter or harsh touch-screen, make and respectively organize transparency electrode and be interspersed on the same plane of transparency carrier;

(b) each the group transparency electrode cell electrode between and each conducting block cross-over connection staggered place insulation course is set;

(c) between the cell electrode of each group transparency electrode, the cross-over connection of conducting block phase is set.

12, the touch display spare that comprises the described capacitive touch screen of claim 1.

13, touch display spare according to claim 12 is characterized in that: it is bonding that the transparency carrier of described touch-screen is provided with the upper substrate of the face of multi-group electrode and display device.

14, touch display spare according to claim 12 is characterized in that: the back side of the transparency carrier of described touch-screen and the upper substrate of display device are bonding, and transparency carrier is provided with on the face of multi-group electrode polaroid is set.

15, touch display spare according to claim 12, it is characterized in that: the transparency carrier of described touch-screen is as the upper substrate of display device, the transparency carrier back side of touch-screen makes the electrode of display device, and transparency carrier is provided with on the face of multi-group electrode polaroid is set.

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