CN203117954U - Capacitive touch screen and display device - Google Patents
Capacitive touch screen and display device Download PDFInfo
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- CN203117954U CN203117954U CN 201320141584 CN201320141584U CN203117954U CN 203117954 U CN203117954 U CN 203117954U CN 201320141584 CN201320141584 CN 201320141584 CN 201320141584 U CN201320141584 U CN 201320141584U CN 203117954 U CN203117954 U CN 203117954U
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Abstract
The utility model discloses a capacitive touch screen and a display device, and relates to the technical field of touch screens. By adjusting patterns of induction electrode units and patterns of driving electrode units, waterproof, suspending and anti-drying effects of the capacitive touch screen are improved. The capacitive touch screen comprises at least one row of induction electrode wire and at least one line of driving electrode line, wherein the induction electrode wire comprises a plurality of the induction electrode units, every two adjacent induction electrode units are in series bridge connection, each induction electrode unit is provided with four outwards protruding protrusions, the driving electrode line comprises a plurality of the driving electrode units, every two adjacent driving electrode units are in series bridge connection, each driving electrode unit is provided with four inwards concave interspaces, and the patterns of the induction electrode units and the patterns of the driving electrode units are matched in a complementary mode and are not contacted with each other.
Description
Technical field
The utility model relates to the touch technology field, relates in particular to a kind of capacitive touch screen and display device.
Background technology
Touch-screen is as a kind of brand-new input equipment, and characteristics such as, human-computer interaction type quick and easy because of it is good have obtained concern more and more widely.According to the difference of know-why, touch-screen mainly can be divided into: resistive touch screen, capacitive touch screen.But resistive touch screen is subject to multi-point touch control, and therefore a lot of production firms concentrate on more energy in the development research of capacitive touch screen.
Capacitive touch screen can be responded to the electric current of human body, when finger touch on metal level, user and touch screen surface form the electric capacity of a coupling, for high-frequency current, electric capacity is direct conductor, namely can calculate touch point position accurately by detecting the output signal variation.
As shown in Figure 1, the capacitive touch screen of prior art is normally used to be the structure of rhombus ITO, and namely the structure of drive electrode unit 101 and induction electrode unit 102 is diamond structure.For fear of the mutual conduction between the electrode, each layer ITO links to each other by the bridge joint mode respectively, and Fig. 2 is the pattern of a pixel cell internal induction electrode unit and drive electrode unit.At least there are the following problems but the inventor finds the capacitive touch screen of prior art: owing to adopted the electrode of diamond structure, cause transversely arranged drive electrode resistance value often much bigger than the induction electrode resistance value of vertical arrangement; In addition, because less over against area between the electrode, the coupling capacitance that make to form is less, and the capacitive touch screen that causes prior art is in waterproof, aspect poor effect such as unsettled and anti-interference.
Summary of the invention
Embodiment of the present utility model provides a kind of capacitive touch screen and display device, by adjusting the pattern of induction electrode unit and drive electrode unit, has improved capacitive touch screen waterproof, unsettled and jamproof effect.
For solving the problems of the technologies described above, embodiment of the present utility model adopts following technical scheme:
A kind of capacitive touch screen comprises at least one row induced electricity polar curve and delegation's drive electrode line at least,
Described induced electricity polar curve comprises a plurality of induction electrodes unit, and adjacent described induction electrode unit bridge joint series connection is provided with four projectioies of outwards giving prominence in the described induction electrode unit;
Described drive electrode line comprises a plurality of drive electrodes unit, and adjacent described drive electrode unit bridge joint series connection is provided with four spaces that cave inward in the described drive electrode unit;
The pattern of described induction electrode unit mates with the pattern complementation of described drive electrode unit and does not contact.
Further, described induced electricity polar curve intersects alternately mutually with described drive electrode line.
Further, described induction electrode unit is along the induced electricity polar curve at this place, induction electrode unit structure axisymmetricly; Described drive electrode unit is along the drive electrode line at this place, drive electrode unit structure axisymmetricly.
Further, the material of described induction electrode unit and described drive electrode unit is ITO indium tin metal oxide.
Further, lay the pattern that free electrode is arranged between the pattern of the pattern of described induction electrode unit and described drive electrode unit.
Further, identical at interval between the pattern of the pattern of the pattern of described empty electrode and described induction electrode unit and described drive electrode unit.
Further, be provided with one deck insulation screen at least between described induced electricity polar curve and the described drive electrode line.
A kind of display device comprises above-mentioned arbitrary described capacitive touch screen.
A kind of capacitive touch screen that the utility model embodiment provides, be provided with four projectioies of outwards giving prominence in the induction electrode unit, be provided with four spaces that cave inward in the drive electrode unit, the pattern of induction electrode unit mates with the pattern complementation of drive electrode unit and does not contact, reduced the resistance value of drive electrode unit, increase the coupling capacitance of capacitive touch screen, improved the waterproof of capacitive touch screen, unsettled and jamproof performance.The utility model also provides a kind of display device in addition, comprises above-mentioned touch-screen, and it possesses the advantage together that touch-screen has.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the pattern of prior art touch screen induction electrode wires and drive electrode line;
Fig. 2 is the pattern of the interior prior art touch screen induction electrode unit of single pixel and drive electrode unit;
Fig. 3 is the pattern of the utility model embodiment touch screen induction electrode wires and drive electrode line;
Fig. 4 is the pattern of the interior the utility model embodiment touch screen induction electrode unit of single pixel and drive electrode unit;
Fig. 5 be the utility model embodiment touch screen induction electrode unit and drive electrode unit in the single pixel pattern two;
Fig. 6 is the utility model embodiment touch-screen and prior art touch-screen output signal curve figure.
Embodiment
The utility model embodiment provides a kind of capacitive touch screen, by adjusting the pattern of induction electrode unit and drive electrode unit, has improved capacitive touch screen waterproof, unsettled and jamproof effect.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
In conjunction with following accompanying drawing the utility model embodiment is described in detail.
The utility model embodiment provides a kind of capacitive touch screen, as shown in Figure 3, comprising at least one row induced electricity polar curve and delegation's drive electrode line at least, described induced electricity polar curve comprises a plurality of induction electrodes unit 1, adjacent described induction electrode unit Bridge 1 connects series connection, is provided with four projectioies of outwards giving prominence in the described induction electrode unit 1; Described drive electrode line comprises a plurality of drive electrodes unit 2, and adjacent described drive electrode unit Bridge 2 connects series connection, is provided with four spaces that cave inward in the described drive electrode unit 2; The pattern of described induction electrode unit 1 mates with the pattern complementation of described drive electrode unit 2 and does not contact.
As shown in Figure 4, Fig. 4 is the pattern that a pixel cell internal induction electrode unit 1 and drive electrode unit 2 are formed.Wherein, induction electrode unit 1 is provided with four projectioies of outwards giving prominence to, adjacent induction electrode unit bridge joint series connection.In fact, this protruding shape has multiple possible shape, and for instance, projection can be common shape such as pointed shape, round, semicircle, parallelogram.Therefore, the pattern of induction electrode unit has multiple possible situation; In addition, in order to reach attractive in appearance, to be convenient to advantages such as calculated resistance value, can also adjust this protruding shape so that the pattern of the induction electrode unit that forms has higher symmetry, for example make the induction electrode unit form axisymmetric pattern, certainly, the induction electrode unit also can form nonaxisymmetrical other patterns.On the other hand, drive electrode unit 2 arranges four spaces that cave inward, and adjacent drive electrode unit Bridge 2 connects series connection, and the complementary coupling of the pattern of the pattern of induction electrode unit 1 and drive electrode unit 2 constitutes the ITO pattern in the pixel cell jointly.Therefore, the void pattern of drive electrode unit also has multiple possible situation, and the pattern that the drive electrode unit forms also has multiple possible situation, does not do at this and gives unnecessary details.In addition, do not contact between the pattern of induction electrode unit and drive electrode unit, guaranteed not have the situation that contacts the electrical connection that produces between induction electrode unit and the drive electrode unit, make to keep between induction electrode unit and the drive electrode unit insulating.
Further, described induced electricity polar curve intersects alternately mutually with described drive electrode line.As shown in Figure 3, comprise three row induced electricity polar curves, triplex row drive electrode line in the capacitive touch screen shown in Figure 3, intersect alternately mutually between induced electricity polar curve and the drive electrode line, constitute the pattern of ITO electrode in the capacitive touch screen jointly.
Further, described induction electrode unit is along the induced electricity polar curve at this place, induction electrode unit structure axisymmetricly; Described drive electrode unit is along the drive electrode line at this place, drive electrode unit structure axisymmetricly.For instance, as shown in Figure 3, being example from left-hand digit secondary series induced electricity polar curve, the induction electrode unit in the secondary series induced electricity polar curve is along this secondary series induced electricity polar curve structure axisymmetricly.
Further, the material of described induction electrode unit and described drive electrode unit is ITO indium tin metal oxide.
Further, lay the pattern that free electrode is arranged between the pattern of the pattern of described induction electrode unit and described drive electrode unit.As shown in Figure 5, empty electrode 3 is laid in the space between induction electrode unit 1 and the drive electrode unit 2.The purpose of laying empty electrode is to constitute the space that may occur in the ITO pattern in order to fill up induction electrode unit and drive electrode unit, prevents that pore belt from coming capacitive touch screen in the unevenness of visual appearance.Obviously, the pattern of empty electrode also has multiple possible situation, does not do at this and gives unnecessary details.
Further, identical at interval between the pattern of the pattern of the pattern of described empty electrode and described induction electrode unit and described drive electrode unit.
Further, be provided with one deck insulation screen at least between described induced electricity polar curve and the described drive electrode line.
A kind of capacitive touch screen that the utility model embodiment provides, be provided with four projectioies of outwards giving prominence in the induction electrode unit, be provided with four spaces that cave inward in the drive electrode unit, the pattern of induction electrode unit mates with the pattern complementation of drive electrode unit and does not contact, reduced the resistance value of drive electrode unit, increase the coupling capacitance of capacitive touch screen, improved the waterproof of capacitive touch screen, unsettled and jamproof effect.
For those skilled in the art better understand the technical scheme of the capacitive touch screen that the utility model embodiment provides and the beneficial effect that this technical scheme is brought, below by specific embodiment the capacitive touch screen that the utility model provides is carried out detail analysis.
At first, be example with a pixel cell shown in Figure 4, the resistance value of estimation induction electrode unit and drive electrode unit.As shown in Figure 4, wherein, pixel cell is of a size of 5.75mm * 5.75mm, is spaced apart 30um between induction electrode unit and the drive electrode unit, and the material of induction electrode unit and drive electrode unit is ITO indium tin metal oxide, and the thicknesses of layers of ITO is
The surface resistivity of ITO is 52 Ω, and adjacent drive electrode unit is by the series connection of metal bridge bridge joint, and the thicknesses of layers of metal bridge is
The surface resistivity of metal bridge is 0.55 Ω.Utilize above-mentioned reference conditions, the resistance value of the induction electrode unit in the utility model embodiment pixel cell and drive electrode unit is estimated.Can utilize the trigonometric integral method at this, by the ITO electrode being decomposed into several triangles ITO electrode block and utilizing the method for integration to calculate the resistance value of ITO electrode.
Utilize the trigonometric integral method, the resistance value that estimates the induction electrode unit of the utility model embodiment under above-mentioned reference conditions is that the resistance value of 233.70 Ω, drive electrode unit is 370.86 Ω.The resistance value of the same induction electrode unit that utilizes same procedure same reference condition estimation prior art is that the resistance value of 233.47 Ω, drive electrode unit is 829.67 Ω.Obviously, the utility model embodiment makes under the situation that induction electrode cell resistance value remains unchanged by adjusting the pattern of induction electrode unit and drive electrode unit, has reduced the resistance value of drive electrode unit.Need to prove, the resistance value of induced electricity polar curve=induction electrode cell resistance * induction electrode unit number, the resistance value of drive electrode line=drive electrode cell resistance * drive electrode unit number, the resistance value that therefore estimates induction electrode unit and drive electrode unit can be in order to the resistance characteristic of further grasp induced electricity polar curve and drive electrode line.
On the other hand, be example with touch-screen shown in Figure 3, the capacitance of estimation induced electricity polar curve.As shown in Figure 3, the touch-screen that comprises three row induced electricity polar curves, triplex row drive electrode line in this capacitive touch screen.Wherein, single pixel cell is of a size of 5.75mm * 5.75mm, is spaced apart 30um between induction electrode unit and the drive electrode unit, and the material of induction electrode unit and drive electrode unit is ITO indium tin metal oxide, and the thicknesses of layers of ITO is
The thicknesses of layers of metal bridge is
The thicknesses of layers of the insulation course between induction electrode unit and the drive electrode unit is
Specific inductive capacity is ε=6.5F/m.
As shown in Figure 3, being example from left-hand digit second induced electricity polar curve, this induced electricity polar curve with from left-hand digit article one induced electricity polar curve, disperse coupling from the 3rd induced electricity polar curve of left-hand digit and drive electrode line and produce coupling capacitance, so this coupling capacitance mainly is subjected to the influence over against area of induction electrode unit and drive electrode unit.Under above-mentioned reference conditions to estimating that from the capacitance of left-hand digit second induced electricity polar curve the capacitance of its induced electricity polar curve is 7.54pf.The capacitance of the same induced electricity polar curve that utilizes same reference condition estimation prior art is about 1.33pf.Obviously, the utility model embodiment is by adjusting the pattern of induction electrode unit and drive electrode unit, increased between induction electrode unit and the drive electrode unit over against area, thereby improved the coupling capacitance of touch-screen.
The touch-screen of the utility model embodiment is than the prior art touch-screen, and coupling capacitance has obtained increase, and the resistance of drive electrode has obtained minimizing.Therefore when importing identical voltage signal, the input signal curve can be as shown in Figure 6.Wherein, abscissa axis is represented the time, axis of ordinates is represented the strength of current exported, and curve 11 is in the output signal that does not have the touch-screen of the utility model embodiment under the finger touch situation, and curve 12 is the output signal of the touch-screen of the utility model embodiment under the finger touch situation; Curve 21 is that curve 22 is the output signal of the touch of prior art under the finger touch situation in the output signal that does not have the touch of prior art under the finger touch situation.Can find that by contrast the touch-screen output signal peak value of the utility model embodiment is higher, that is to say that under the identical input condition, the signal to noise ratio (S/N ratio) of the touch-screen of the utility model embodiment is higher; And aspect attenuated output signal, the rate of decay of the touch-screen output signal of the utility model embodiment is also fast than the attenuated output signal speed of prior art touch-screen, therefore, the touch screen signal of the utility model embodiment seizure better effects and if anti-interference effect are better.In addition, because the utility model embodiment touch-screen coupling capacitance has obtained increase, therefore, water droplet is littler to the electric capacity change rate value of the touch-screen generation of the utility model embodiment, its waterproof and anti-unsettled better effects if.
A kind of capacitive touch screen that the utility model embodiment provides, be provided with four projectioies of outwards giving prominence in the induction electrode unit, be provided with four spaces that cave inward in the drive electrode unit, the pattern of induction electrode unit mates with the pattern complementation of drive electrode unit and does not contact, reduced the resistance value of drive electrode unit, increase the coupling capacitance of capacitive touch screen, improved the waterproof of capacitive touch screen, unsettled and jamproof effect.
The utility model also provides a kind of display device in addition, comprises the described touch-screen of above-described embodiment, and it possesses all advantages that described touch-screen has.
The above; it only is embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of described claim.
Claims (8)
1. capacitive touch screen comprises at least one row induced electricity polar curve and delegation's drive electrode line at least, it is characterized in that,
Described induced electricity polar curve comprises a plurality of induction electrodes unit, and adjacent described induction electrode unit bridge joint series connection is provided with four projectioies of outwards giving prominence in the described induction electrode unit;
Described drive electrode line comprises a plurality of drive electrodes unit, and adjacent described drive electrode unit bridge joint series connection is provided with four spaces that cave inward in the described drive electrode unit;
The pattern of described induction electrode unit mates with the pattern complementation of described drive electrode unit and does not contact.
2. capacitive touch screen according to claim 1 is characterized in that, described induced electricity polar curve intersects alternately mutually with described drive electrode line.
3. capacitive touch screen according to claim 1 is characterized in that, described induction electrode unit is along the induced electricity polar curve at this place, induction electrode unit structure axisymmetricly; Described drive electrode unit is along the drive electrode line at this place, drive electrode unit structure axisymmetricly.
4. capacitive touch screen according to claim 1 is characterized in that, the material of described induction electrode unit and described drive electrode unit is ITO indium tin metal oxide.
5. capacitive touch screen according to claim 1 is characterized in that, lays the pattern that free electrode is arranged between the pattern of the pattern of described induction electrode unit and described drive electrode unit.
6. capacitive touch screen according to claim 5 is characterized in that, and is identical at interval between the pattern of the pattern of described empty electrode and described induction electrode unit and the pattern of described drive electrode unit.
7. capacitive touch screen according to claim 1 is characterized in that, is provided with one deck insulation screen at least between described induced electricity polar curve and the described drive electrode line.
8. a display device is characterized in that, comprises as the arbitrary described capacitive touch screen of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320141584 CN203117954U (en) | 2013-03-26 | 2013-03-26 | Capacitive touch screen and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320141584 CN203117954U (en) | 2013-03-26 | 2013-03-26 | Capacitive touch screen and display device |
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| CN203117954U true CN203117954U (en) | 2013-08-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103186306A (en) * | 2013-03-26 | 2013-07-03 | 北京京东方光电科技有限公司 | Capacitive touch screen and display device |
| CN105278722A (en) * | 2014-07-25 | 2016-01-27 | 南京瀚宇彩欣科技有限责任公司 | Laser pattern device and laser pattern optical mesh of invisible sensor layer of touch panel |
| CN105304579A (en) * | 2014-07-25 | 2016-02-03 | 南京瀚宇彩欣科技有限责任公司 | Laser patterned invisible sensor layer substrate |
-
2013
- 2013-03-26 CN CN 201320141584 patent/CN203117954U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103186306A (en) * | 2013-03-26 | 2013-07-03 | 北京京东方光电科技有限公司 | Capacitive touch screen and display device |
| CN105278722A (en) * | 2014-07-25 | 2016-01-27 | 南京瀚宇彩欣科技有限责任公司 | Laser pattern device and laser pattern optical mesh of invisible sensor layer of touch panel |
| CN105304579A (en) * | 2014-07-25 | 2016-02-03 | 南京瀚宇彩欣科技有限责任公司 | Laser patterned invisible sensor layer substrate |
| CN105304579B (en) * | 2014-07-25 | 2018-02-02 | 南京瀚宇彩欣科技有限责任公司 | The stealthy sensing laminar substrate of laser patterning |
| CN105278722B (en) * | 2014-07-25 | 2018-09-14 | 南京瀚宇彩欣科技有限责任公司 | The laser patterning equipment and laser of touch panel stealth sensed layer pattern grid |
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| ASS | Succession or assignment of patent right |
Owner name: BEIJING BOE PHOTOELECTRICITY SCIENCE + TECHNOLOGY Effective date: 20150710 Owner name: JINGDONGFANG SCIENCE AND TECHNOLOGY GROUP CO., LTD Free format text: FORMER OWNER: BEIJING BOE PHOTOELECTRICITY SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20150710 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150710 Address after: 100015 Jiuxianqiao Road, Beijing, No. 10, No. Patentee after: BOE TECHNOLOGY GROUP Co.,Ltd. Patentee after: BEIJING BOE OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Address before: 100176 Beijing city Daxing District economic and Technological Development Zone of Beijing Road No. 8 Patentee before: BEIJING BOE OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130807 |
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| CX01 | Expiry of patent term |