CN103677477A - Resistance type touch screen, touch point positioning method thereof and touch display device - Google Patents
Resistance type touch screen, touch point positioning method thereof and touch display device Download PDFInfo
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- CN103677477A CN103677477A CN201210337573.4A CN201210337573A CN103677477A CN 103677477 A CN103677477 A CN 103677477A CN 201210337573 A CN201210337573 A CN 201210337573A CN 103677477 A CN103677477 A CN 103677477A
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Abstract
The invention discloses a resistance type touch screen which comprises a first substrate and further comprises a second substrate and a transparent electric conduction layer which is grounded. Electric conduction strips are arranged on the two opposite sides of the second substrate respectively, and each electric conduction strip is composed of multiple small electric conduction strips which are disconnected. Strip-shaped induction electrodes are obliquely arranged between the two electric conduction strips. The invention further discloses a touch point positioning method of the resistance type touch screen and a touch display device. By the utilization of the resistance type touch screen, the touch point positioning method of the resistance type touch screen and the touch display device, cost for the resistance type touch screen can be reduced, the manufacturing technology can be simplified, and multi-point touch can be achieved.
Description
Technical field
The present invention relates to the contact location technology in liquid crystal display, relate in particular to a kind of resistive touch screen and contact positioning method thereof and touch control display apparatus.
Background technology
Along with the development of display technique, touch-screen is universal gradually.So-called touch-screen refers on display panel and completes a position with finger or the touching gently of special nib, if classification, finger touches belongs to finger touch type, and nib is touched and belonged to nib touch-type.Wherein, nib touch-type touch-screen is mainly used when the higher picture of accuracy requirement or handwriting; Finger touch type touch-screen is used in the not high occasion of stroke accuracy requirement.Finger touch type touch-screen does not need to have special pens, and only need can complete the operations such as input with the direct touch display panel of finger, this distance between man-machine that virtually furthered.Nib touch-type touch-screen comprises: electromagnetic induction type and electrostatic induction; Finger touch type touch-screen comprises: capacity formula, optical profile type, sound type and pressure detect type etc.In addition,, from another angle, touch-screen can be divided into resistive touch screen and capacitive touch screen etc. again.
Existing resistive touch screen is generally four lines or eight wire resistive touch screens, and these resistive touch screens are all Double-layered transparent board structure.Fig. 1 is the structural representation of existing four-wire resistance type touch screen, as shown in Figure 1, described four-wire resistance type touch screen is provided with two-layer transparency carrier on first substrate 1, be respectively transparency carrier 2 and lower transparency carrier 3, opposite side at every layer of transparency carrier is arranged with two buss 4 in parallel, the bus 4 arranging on upper and lower two-layer transparency carrier is mutually vertical, to realize the location of contact.Wherein, described first substrate 1 can be selected the transparent materials such as glass or resin.When location, the bus 4 on upper and lower transparency carrier for example, for positioning contact coordinate: the bus 4 location horizontal ordinates on upper transparency carrier 2; Bus 4 location ordinates on lower transparency carrier 3.At the lower surface of upper transparency carrier 2 and the upper surface of lower transparency carrier 3, be equipped with the checkerboard type striped that the materials such as indium tin oxide (ITO) form, hereinafter referred to as bar shaped induction electrode, as shown in Figure 1, the two ends of the bar shaped induction electrode on every layer of transparency carrier are all connected with bus 4 and are vertical.
The structure of eight wire resistive touch screens and function and four-wire resistance type touch screen are similar, no longer describe in detail herein.As can be seen from Figure 1, along with the increase of resistive touch screen line number, the quantity of bus will increase to some extent, and the formation difficulty of bar shaped induction electrode also will increase to some extent, and visible, existing resistive touch screen not only manufacturing cost is higher, and manufacture craft difficulty is larger.
In addition, existing resistive touch screen only can be realized single-point touch technology, has not met following development trend.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of resistive touch screen and contact positioning method and touch control display apparatus, not only can reduce cost and the manufacture craft of resistive touch screen, and can realize multi-point touch.
For achieving the above object, technical scheme of the present invention is achieved in that
A resistive touch screen, comprises first substrate; This resistive touch screen also comprises: the transparency conducting layer of second substrate and ground connection; Wherein,
On described second substrate, relative both sides are respectively provided with a bus, and two buss form by a plurality of disjunct little buss; Between two buss, be provided with the bar shaped induction electrode of inclination.
In such scheme, one end of described bar shaped induction electrode is connected with bus, and other end voltage is 0.
In such scheme, the angle α between described bar shaped induction electrode and bus is 0 < α < 90 degree.
In such scheme, the supply voltage being connected with each little bus of described bus is 3V or 5V.
In such scheme, on described transparency conducting layer, be also provided with protective filmy layer, transparent, insulation material that described protective film adopts.
In such scheme, described protective film is: polyethylene terephtalate film.
A touch control display apparatus, comprises above-mentioned resistive touch screen.
A contact positioning method for resistive touch screen, the method comprises:
Measure bar shaped induction electrode upper contact and the electric current being connected between bus; Distance according to measured Current calculation contact to the bus that is connected; According to the distance calculating, calculate contact coordinate.
In such scheme, the measuring method of the electric current between described bar shaped induction electrode upper contact and bus is: by the current testing device arranging on bus, measure; Or the current testing device arranging by stylus end is measured.
In such scheme, the method also comprises: in position fixing process, in described resistive touch screen, each little bus of bus is all connected with column scan integrated circuit, when column scan IC scanning to little bus, the calculating of electric current between contact on the bar shaped induction electrode that carries out being connected with little bus and bus, and the position that draws corresponding contacts.
Resistive touch screen provided by the invention and contact positioning method thereof and touch control display apparatus, by the bar shaped induction electrode being obliquely installed between two buss arranging on single-layer and transparent substrate and two buss, realize contact and locate, and the transparency conducting layer of ground connection is set on the upper strata of described single-layer and transparent substrate; Wherein, described two buss form by a plurality of disjunct little buss.The present invention is reduced to single-layer and transparent substrate by the existing two-layer transparency carrier that is provided with bar shaped induction electrode, and the present invention only need arrange two buss on described single-layer and transparent substrate, and by the bar shaped induction electrode being obliquely installed between bus, can realize contact and locate, compared with prior art, reduce the number of bus and bar shaped induction electrode, therefore can reduce the manufacture craft of cost and product.
In addition, in the position fixing process of contact, each little bus of bus of the present invention is all connected with column scan integrated circuit, because column scan integrated circuit is carried out scan round operation, when scanning a little bus, will carry out Current calculation, a plurality of little buss just can detect a plurality of contacts.Therefore, bus of the present invention can be realized multi-point touch.
Meanwhile, the bar shaped induction electrode of oblique line formula of the present invention, makes to utilize simple trigonometric function formula can obtain the transverse and longitudinal coordinate of contact when location, has simplified operand, thereby has improved induction speed, and resistive touch screen can be accepted and process information faster.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing four-wire resistance type touch screen;
Fig. 2 is the sectional view of resistive touch screen of the present invention;
Fig. 3 is the planar structure schematic diagram of second substrate in resistive touch screen of the present invention;
Fig. 4 is the refined structure figure of second substrate of the present invention and transparency conducting layer surface of contact;
Fig. 5 is the cross-sectional view of resistive touch screen of the present invention while being pressed;
Fig. 6 is the embodiment schematic diagram that resistive touch screen of the present invention positions;
Fig. 7 is that the present invention is for the circuit structure diagram of metering contact electric current.
Description of reference numerals:
1, first substrate; 2, upper transparency carrier; 3, lower transparency carrier; 4, bus; 5, second substrate; 6, transparency conducting layer; 7, bar shaped induction electrode; D, contact; The length of AB, bar shaped induction electrode; The horizontal ordinate of X, contact; The ordinate of Y, contact.
Embodiment
Basic thought of the present invention is: by the bar shaped induction electrode being obliquely installed between two buss arranging on single-layer and transparent substrate and two buss, realize contact and locate, and the transparency conducting layer of ground connection is set on the upper strata of described single-layer and transparent substrate; Wherein, described two buss form by a plurality of disjunct little buss.
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Fig. 2 is the sectional view of resistive touch screen of the present invention, as shown in Figure 2, comprising: the transparency conducting layer 6 of first substrate 1, second substrate 5 and ground connection.Wherein, described second substrate 5 is single-layer and transparent substrate mentioned above, and described second substrate 5 can be selected the material identical with first substrate 1, as: the transparent materials such as glass or resin; Described transparency conducting layer 6 can be selected the materials such as ITO or indium-zinc oxide (IZO).
On described second substrate 5, relative both sides respectively arrange a bus 4, and as shown in Figure 3, described two buss 4 form by a plurality of disjunct little buss.The bar shaped induction electrode 7 that is provided with inclination between two buss, can be the transparent conductive materials such as ITO, IZO.
One end of bar shaped induction electrode 7 is connected with bus 4, and the other end is unsettled, and voltage is 0.
Angle α between described ITO striped and bus 4 is 0 < α < 90 degree, in use, if near the number of times being pressed the center of touch-screen is more, what α can be arranged is large, reason is as follows: as shown in Figure 3, if α is larger, several bar shaped induction electrodes 7 that the center being pressed contacts will be connected from described two different buss 4, like this for same pressing position can obtain two with two coordinate results that bus is corresponding, after two results are relatively calculated, can improve the positioning precision of the position that is often pressed.
Further, the supply voltage being connected with each little bus of described bus 4 is generally 3V or 5V.
From the embodiment of Fig. 3, can find out, take diagonal line as boundary, a bus can only complete the location of half screen, for the location of second half screen, by another bus, is completed.
Fig. 4 is the refined structure figure of second substrate of the present invention and transparency conducting layer surface of contact, and as shown in Figure 4, the round dot between described second substrate 5 and transparency conducting layer 6 is the cross section of bar shaped induction electrode 7.When resistive touch screen is not pressed, transparency conducting layer 6 does not contact with bar shaped induction electrode 7, as shown in Figure 4; When the surface of resistive touch screen is pressed, transparency conducting layer 6 contacts conducting with bar shaped induction electrode 7, as shown in Figure 5.
It should be noted that, when transparency conducting layer is pressed, stave, on described transparency conducting layer 6, be also provided with protective filmy layer, transparent, insulation material that described protective film adopts.
Particularly, above-mentioned protective film can be transparent, the insulation materials such as polyethylene terephthalate (PET) film.Here, select PET film to be because it has the following advantages: PET film has good optical property, i.e. optical transparence and weatherability, and there is good rub resistance and electrical insulating property, and cost performance is high.
The present invention also provides a kind of touch control display apparatus, comprises above-mentioned resistive touch screen.Described touch control display apparatus can be notebook computer, mobile phone, panel computer, televisor, digital album (digital photo frame), navigating instrument etc.
Below in conjunction with Fig. 6, the contact positioning method of resistive touch screen of the present invention is described.
First, measure bar shaped induction electrode upper contact and the electric current being connected between bus;
Be specially: as shown in Figure 6, measure contact D and the electric current being connected between bus on bar shaped induction electrode 7, measure the electric current of AD section on bar shaped induction electrode 7.Here, can measure by the current testing device arranging the electric current of AD section on bus 4; Or if this resistive touch screen arranges corresponding stylus, the current testing device that can arrange by the end at stylus is measured the electric current of AD section.
Then, the distance to the bus that is connected according to measured Current calculation contact;
Be specially: according to the electric current I of the AD section having recorded
aD, and formula AD=(I
aD/ I
aB) * AB calculates contact D to the distance of bus.Wherein, the length of described AB, the length of bar shaped induction electrode is known, I
aBalso known, therefore can calculate the length of AD.About I
aB, because the pressure drop of whole piece bar shaped induction electrode is known, be 5V or 3V, bar shaped induction electrode can be regarded resistance as, and its resistance value is also known, thus known I
aBvalue.
Finally, according to the distance calculating, calculate contact coordinate;
Be specially: as shown in Figure 6, because of bar shaped induction electrode, the angle α of AB and bus 4 is known, according to trigonometric function formula, can show that the transverse and longitudinal coordinate of contact is:
X＝(AB-AD)×cosα，Y＝AD×sinα。
Fig. 7 is the structural representation of contact of the present invention positioning circuit, as shown in Figure 7, each little bus of bus 4 is all connected with row (Row) scan IC, because Row scan IC is carried out scan round operation, when scanning a little bus, the calculating of electric current between the contact on the bar shaped induction electrode that carries out being connected with little bus and bus, and then the position that draws corresponding contacts, so, a plurality of little bus just can detect a plurality of contacts.Therefore, bus of the present invention can be realized multi-point touch.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (10)
1. a resistive touch screen, comprises first substrate; It is characterized in that, this resistive touch screen also comprises: the transparency conducting layer of second substrate and ground connection; Wherein,
On described second substrate, relative both sides are respectively provided with a bus, and two buss form by a plurality of disjunct little buss; Between two buss, be provided with the bar shaped induction electrode of inclination.
2. resistive touch screen according to claim 1, is characterized in that, one end of described bar shaped induction electrode is connected with bus, and other end voltage is 0.
3. resistive touch screen according to claim 1, is characterized in that, the angle α between described bar shaped induction electrode and bus is 0 < α < 90 degree.
4. resistive touch screen according to claim 1, is characterized in that, the supply voltage being connected with each little bus of described bus is 3V or 5V.
5. according to the resistive touch screen described in claim 1 to 4 any one, it is characterized in that, on described transparency conducting layer, be also provided with protective filmy layer, transparent, insulation material that described protective film adopts.
6. resistive touch screen according to claim 5, is characterized in that, described protective film is: polyethylene terephtalate film.
7. a touch control display apparatus, is characterized in that, comprises the resistive touch screen described in claim 1 to 6 any one.
8. a contact positioning method for resistive touch screen, is characterized in that, the method comprises:
Measure bar shaped induction electrode upper contact and the electric current being connected between bus; Distance according to measured Current calculation contact to the bus that is connected; According to the distance calculating, calculate contact coordinate.
9. the contact positioning method of resistive touch screen according to claim 8, is characterized in that, the measuring method of the electric current between described bar shaped induction electrode upper contact and bus is:
By the current testing device arranging on bus, measure; Or the current testing device arranging by stylus end is measured.
10. the contact positioning method of resistive touch screen according to claim 8 or claim 9, it is characterized in that, the method also comprises: in position fixing process, in described resistive touch screen, each little bus of bus is all connected with column scan integrated circuit, when column scan IC scanning to little bus, the calculating of electric current between contact on the bar shaped induction electrode that carries out being connected with little bus and bus, and the position that draws corresponding contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210337573.4A CN103677477A (en) | 2012-09-12 | 2012-09-12 | Resistance type touch screen, touch point positioning method thereof and touch display device |
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| CN201210337573.4A CN103677477A (en) | 2012-09-12 | 2012-09-12 | Resistance type touch screen, touch point positioning method thereof and touch display device |
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| CN103677477A true CN103677477A (en) | 2014-03-26 |
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| CN201210337573.4A Pending CN103677477A (en) | 2012-09-12 | 2012-09-12 | Resistance type touch screen, touch point positioning method thereof and touch display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018804A (en) * | 2019-04-12 | 2019-07-16 | 京东方科技集团股份有限公司 | A kind of display device, image display method and electronic equipment |
| CN115752823A (en) * | 2022-11-24 | 2023-03-07 | 吉林大学 | Non-array bionic flexible touch sensor with positioning function and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5640258A (en) * | 1995-01-27 | 1997-06-17 | Fujitsu Limited | Touch panel having 15 to 30 degree angle between direction of display unit elements and direction of input unit elements |
| CN102645994A (en) * | 2011-09-14 | 2012-08-22 | 北京京东方光电科技有限公司 | Touch panel and touch positioning method and device thereof |
-
2012
- 2012-09-12 CN CN201210337573.4A patent/CN103677477A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5640258A (en) * | 1995-01-27 | 1997-06-17 | Fujitsu Limited | Touch panel having 15 to 30 degree angle between direction of display unit elements and direction of input unit elements |
| CN102645994A (en) * | 2011-09-14 | 2012-08-22 | 北京京东方光电科技有限公司 | Touch panel and touch positioning method and device thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018804A (en) * | 2019-04-12 | 2019-07-16 | 京东方科技集团股份有限公司 | A kind of display device, image display method and electronic equipment |
| CN115752823A (en) * | 2022-11-24 | 2023-03-07 | 吉林大学 | Non-array bionic flexible touch sensor with positioning function and preparation method thereof |
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Application publication date: 20140326 |
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