CN203502931U

CN203502931U - Oversize multipoint touch sensing unit

Info

Publication number: CN203502931U
Application number: CN201320579389.0U
Authority: CN
Inventors: 刘泽江
Original assignee: SUZHOU FANPU NANO TECHNOLOGY Co Ltd
Current assignee: SUZHOU FANPU NANO TECHNOLOGY Co Ltd; UC Nano Technologies Inc
Priority date: 2013-09-18
Filing date: 2013-09-18
Publication date: 2014-03-26
Anticipated expiration: 2023-09-18

Abstract

The utility model discloses an oversize multipoint touch sensing unit. On the basis of multipoint recognition method, the oversize multipoint touch sensing unit comprises a gridded electromagnetic sensing layer, a two-layer surface substrate with the gridded electromagnetic sensing layer embedded inside, and a sensing signal collection and control integrated circuit in communication connection with the gridded electromagnetic sensing layer, and the sensing signal collection and control integrated circuit is in communication connection with a calculation control unit with a touch driving program. By the oversize multipoint touch sensing unit, application of multipoint touch in the technical field of oversize touch is realized.

Description

A kind of oversize multi-point touch sensing unit

Technical field

The utility model belongs to touch technology field, relates in particular to a kind of oversize multi-point touch sensing unit.

Background technology

Increasingly extensive along with touch technology application, its range of application is from mobile phone, PAD, GPS(Global Navigation System), the mass consumption electronic applications such as MP3 expands to rapidly the fields such as Smart Home (as touch-control TV, touch-control refrigerator, touch-control kitchen, touch-control tea table etc.), interactive digital label, interactive display and demonstration, interactive teaching.The features such as simple, convenient, the hommization of touch control operation have become the best interface of human-computer interaction universal rapidly.At present, in touch technology field, there are the touch technologies such as infrared, surface acoustic wave, surface capacitance, resistance, optics, for in, (3.5 ~ 7 inches is small size to large scale screen design requirement, 10 ~ 15 inches is middle large scale, and 17 ~ 22 inches is large scale, and 30 inches is oversize above), in order to meet integrated touch-control human interface applications, must select to be applicable to compared with the touch-control sensing technical scheme of giant-screen.

First, for early stage used electric resistance touch-control detection technology, though can there is advantage aspect material and technical costs, also can adapt to the small screen in, the integrated demand of touch technology of large scale screen, but in fact electric resistance touch-control still has material, the congenital restriction of structure and technical elements, for example, the membrane structure of electric resistance touch-control sensing can cause screen transmittance to be affected, also can be because of the physical construction of diaphragm pressure induction, make serviceable life and be greatly affected because of a large amount of touching by, on the device of frequent use kenel, be easy to expose technical applied defect.

Secondly, for capacitive touch control techniques, because its principle system is through operator's finger contact screen, affects the faint variation of whole sensing layer capacitance state, and then see through touch-control IC analysis contact position.Initial stage development can meet product development demand for the touch-control design of the small screen, if but then in dropping into and surpassing, the touch technology of large scale screen is integrated, the giant-screen cover glass laminating difficulty of G/G (Glass to Glass) structure is high, the structural problem of G/G causes the slab strength of large scale screen to be affected, even if the thickness problem of G/G scheme can't have influence on the designing requirement of middle large scale screen product, but in fact the yield of G/G touch-control scheme has affected the cost of end product, thereby have influence on the cost of the middle large touch screen of application capacitive touch control techniques.Therefore, capacitance touching control technical scheme runs into bottleneck in exploitation in large size.

The touch-control application scheme that was originally used in electronic whiteboard, public's display, is also applied in part brand of computer.For example, in surpassing computer with integrated (All-in-one) product of 20 cun, just have the optical touch control of use scheme, and in larger sized design proposal, part there is the sound wave of use sensing and detecting type touch-control scheme.No matter be optical touch control scheme or sound wave sensing and detecting type touch-control scheme, its degree of accuracy of following the trail of contact has error to a certain degree, this is mainly due to optics sensing and detecting type, to be easily subject to the impact of light, and sound wave sensing and detecting type waterproof ability a little less than, this just causes, and contact accuracy cannot as resistance-type or capacitance touching control scheme be accurate.In addition, touching of man-machine interface, press and interface feedback process, consuming time also slightly of a specified duration compared with resistance or capacitance touching control, under degree of accuracy and system feedback limited speed, therefore the benefit of applying at large-size screen monitors is also affected.Except accuracy and system feedback speed issue, most users are in the familiar multi-point touch use habit of small screen, if adopt optics or sound wave induction touch-control at middle large-size screen monitors touch-control product, also can be because of Technical Architecture bottleneck aspect the application support of multi-point touch, and cannot obtain preferably multi-point touch, experience, and infrasonic wave's touch-control scheme of low frequency, when the hand-written slip of user, also can be sent a kind of sizzle, affects user's touch-control experience effect.

Finally, infrared touch screen is a circuit board housing to be installed above, circuit board on screen four limits, arrange infrared transmitting tube and infrared receiving tube, the one by one corresponding infrared ray matrix anyhow intersecting that forms at display.User is when Touch Screen, and finger will block two infrared rays anyhow through this position, thereby can judge touch point in the position of screen.At present, infrared touch screen is applied to large scale more, but it must be arranged on display device outside, and aesthetic property is poor.While applying out of doors, a little less than antiknock, waterproof ability, serviceable life is low etc., and shortcoming has also restricted its application.

Known multi-point touch-control panel (as electric capacity, resistance) is the transparency carrier that surface distributed has induction detection layers, and the signal that uses finger or nib contact to produce by user is inputted and controlled.Its inside is by two-layer high-transparent glass/thin-film package ITO(indium tin oxide) multi-point touch that forms induction detection layers, user by this induction detection layers of finger touch corresponding to the relevant position on display screen, thereby carry out touch control operation.Complex manufacturing technology due to described multi-point touch induction detection layers, and indium tin oxide is scarce resource, cause its price high limited with supply, and multi-point touch induction detection layers is applied to more, and on small-medium size screen, (wherein 3.5 ~ 7 inches is small size, 10 ~ 15 inches is middle large scale, 17 ~ 22 inches is large scale, and 30 inches is oversize above).On the other hand, the penetration capacity of the multi-point touch of above-mentioned small-medium size induction detection layers is limited as 3mm, because the limitation of technique and technology makes it can not carry out curved surface touch-control, so the scope of application is limited to very much.On the one hand, in middle large touch scheme, touch-control precision is poor again, has and postpones and multiple spot technological architecture bottleneck; These have all restricted it and have extensively popularized.

Also has a kind of touch control film that encapsulates ultrafine wire network electromagnetic inductive layer and preparation method thereof, if the patent No. is as described in 200910181699.5 and 201210236716.2, be characterized in that built-in ultrafine wire cost is lower, wider in oversize screen application, but because the touch-control of oversize only limits to single-point, two point touch-control, cannot make many people carry out multi-point interaction information on a large touch screen.

In view of deficiency and the defect of above-mentioned technical field, be badly in need of developing a kind ofly can be applied on oversize, can multi-point touch sensing unit, to be applicable to the market demand, widen the range of application in touch-control field.

Utility model content

In view of the defect that above-mentioned prior art exists, the purpose of this utility model is to propose a kind of oversize multi-point touch sensing unit.

The purpose of this utility model will be achieved by the following technical programs:

A kind of oversize multi-point touch sensing unit, comprise a network electromagnetic inductive layer, the two layers of surface basic unit of embedded described network electromagnetic inductive layer, one induced signal being connected with described network electromagnetic inductive layer communication gathers control integration circuit, and described induced signal gathers control integration circuit and is connected with a calculation control unit communication with touch-control driver.

Preferably, above-mentioned a kind of oversize multi-point touch sensing unit, wherein: described network electromagnetic inductive layer comprises that described ultrafine wire is located mutually insulated in point of crossing by ultrafine wire, the intertwining longitude and latitude netting twine interweaving that form along X-axis and Y-axis coiling respectively.

Preferably, above-mentioned a kind of oversize multi-point touch sensing unit, wherein: the pressing mode of described network electromagnetic inductive layer by spray printing and/or silk-screen and/or impression is embedded among two layers of surface basic unit.

Preferably, above-mentioned a kind of oversize multi-point touch sensing unit, wherein: described network electromagnetic inductive layer is two-layer or two-layer above longitude and latitude netting twine, on every layer of described longitude and latitude netting twine, is coated with insulation course.

Preferably, above-mentioned a kind of oversize multi-point touch sensing unit, wherein: described ultrafine wire comprises nm-class conducting wire and/or plain conductor.

Preferably, above-mentioned a kind of oversize multi-point touch sensing unit, wherein: described surperficial basic unit is flexible and transparent film, smooth wallpaper or carpet, clear glass or acrylic board; The thickness of described surperficial basic unit is less than or equal to 10 millimeters; Described surperficial basic unit is plane or curved-surface structure.

Preferably, above-mentioned a kind of oversize multi-point touch sensing unit, wherein: after the ultrafine wire of described network electromagnetic inductive layer collects, by a data stream output interface, gather control integration circuit with a data stream input interface and described induced signal and be connected; Described data stream input interface has the independently ultrafine wire signal output interface of X-axis and Y-axis; Described data stream output interface and data stream input interface are flexible print circuit, electrode or contact pin.

Preferably, above-mentioned a kind of oversize multi-point touch sensing unit, wherein: it is to have the integrated circuit of multi-point touch signals collecting, processing and computer standard output interface function or the circuit main board that integrated circuit combines with P.e.c. that described induced signal gathers control integration circuit; Described induced signal gathers control integration circuit and comprises:

Power transfer module, converts the input voltage of communication interface in acquisition system mimic channel and the required voltage of digital circuit, and input power and out-put supply is isolated, to prevent that external power source from producing interference by communication interface;

Transtation mission circuit module, for generation of the required pumping signal of capacitance detecting, respectively the X-axis on ultrafine wire, Y-axis point of crossing are discharged and recharged to scanning successively, and the matrix signal that scanning is obtained is sent to CPU processing module, under the control of CPU processing module, the matrix signal that timesharing receives different receiving cables sends to receiving circuit module;

Receiving circuit module, by the matrix signal receiving amplify, rectification and filtering conversion, matrix signal converts data-signal to the most at last, and sends into CPU processing module and process;

And CPU processing module, control the operation that described induced signal gathers control integration circuit, and final collection signal is carried out to digital operation and processing, transfer to calculation control unit and carry out multiple spot identifying processing.

Preferably, above-mentioned a kind of oversize multi-point touch sensing unit, wherein: described touch-control driver comprises DSP data processor, be used for carrying out multiple spot identification, and the touch-control sensitivity of described touch-control sensing unit and the calibration of threshold values, whether detect described ultrafine wire has broken string and electromagnetic interference (EMI) degree simultaneously.

Preferably, above-mentioned a kind of oversize multi-point touch sensing unit, wherein: described touch-control driver is arranged in the operating system of calculation control unit, or is arranged in the hardware driving device of independently exempting from Installation and Debugging; The operating system of described calculation control unit comprises Linux, Windows or Android.

Outstanding effect of the present utility model is:

1. a kind of recognition methods of oversize multi-point touch sensing unit is provided, and a kind of oversize touch-control sensing unit, realized the application of multi-point touch in oversize touch technology field;

2. the preparation method of oversize multi-point touch sensing unit adopts streamlined operation, and starting material obtain and are easy to get, and cost is easy to control;

Software based on multiple spot algorithm can manual installation to calculation control unit, also can be integrated in a hardware driving device, plug and play, can be adapted to several operation systems, has hommization visual interface;

4. the abundant raw materials of preparing oversize multi-point touch sensing unit, consumption is few, can replace conventional I TO technology, avoids using the rare materials such as indium tin oxide, and pollution-free;

5. the penetration capacity of oversize multi-point touch sensing unit surpasses 3mm, reaches 10mm, has strengthened anti-riot, waterproof ability, has expanded its application in the field of the anti-riot water-proof functions of numerous needs such as military affairs, industry, business;

6. can realize oversize multi-point touch sensing unit in the application in curved surface touch-control field.

Below just accompanying drawing in conjunction with the embodiments, is described in further detail embodiment of the present utility model, so that technical solutions of the utility model are easier to understand, grasp.

Accompanying drawing explanation

Fig. 1 is the structural representation of the multi-point touch sensing unit of the utility model embodiment;

Fig. 2 is the structural representation that the induced signal of the utility model embodiment gathers control integration circuit;

Fig. 3 is the system flowchart of the utility model embodiment;

Fig. 4 is the detection distribution schematic diagram of the network electromagnetic inductive layer of the utility model embodiment.

Embodiment

A kind of oversize multi-point touch sensing unit of the present embodiment, as shown in Fig. 1 ~ Fig. 4, comprise network electromagnetic inductive layer 3, the two layers of surface basic unit (not shown) of embedded grid electromagnetic induction layer 3, after the ultrafine wire of network electromagnetic inductive layer 3 collects, by data stream output interface 4, is connected induced signal collection control integration circuit 7 with data stream input interface 5, data stream input interface 5 has the independently ultrafine wire signal output interface of X-axis and Y-axis; Data stream output interface 4 and data stream input interface 5 are flexible print circuit, electrode or contact pin.Induced signal gathers control integration circuit 7 and is connected with the calculation control unit 9 with touch-control driver by communication interface 6.

Network electromagnetic inductive layer 3 comprises that ultrafine wire is located mutually insulated in point of crossing by ultrafine wire, the intertwining longitude and latitude netting twine interweaving that form along X-axis and Y-axis coiling respectively, and the space that each point of crossing encloses forms a sensing unit.Optionally, described network electromagnetic inductive layer is embedded among two layers of surface basic unit by pressing modes such as spray printing and/or silk-screen and/or impressions, network electromagnetic inductive layer 3 is two-layer or two-layer above longitude and latitude netting twine, on every layer of described longitude and latitude netting twine, be coated with insulation course, sensing unit layout interlaced with each other on every layer of longitude and latitude netting twine, cellular, the rectangular-shaped or diamond shaped that is rule, the spacing size between sensing unit is identical, or not identical.Ultrafine wire comprises nm-class conducting wire and/or plain conductor.

Surface basic unit is flexible and transparent film, smooth wallpaper or carpet, clear glass or acrylic board; The thickness of surface basic unit is less than or equal to 10 millimeters; Surface basic unit is plane or curved-surface structure.

It is to have the integrated circuit of multi-point touch signals collecting, processing and computer standard output interface function or the circuit main board that integrated circuit combines with P.e.c. that induced signal gathers control integration circuit 7; Induced signal gathers control integration circuit and comprises:

Power transfer module, converts the input voltage of communication interface 6 in acquisition system mimic channel and the required voltage of digital circuit, and input power and out-put supply is isolated, to prevent that external power source from producing interference by communication interface;

And CPU processing module, control the operation that induced signal gathers control integration circuit, and final collection signal is carried out to digital operation and processing, transfer to calculation control unit 9 and carry out multiple spot identifying processing.

Touch-control driver comprises DSP data processor, for carrying out multiple spot identification, and the calibration of the touch-control sensitivity of debugging touch-control sensing unit and threshold values etc., whether detect described ultrafine wire has broken string and electromagnetic interference (EMI) degree simultaneously.Touch-control driver is arranged in the operating system of calculation control unit 9, or is arranged in the hardware driving device of independently exempting from Installation and Debugging.The operating system of calculation control unit 9 comprises Linux, Windows or Android.

A recognition methods for oversize multi-point touch sensing unit, comprises the steps:

Step 1, by power transfer module, become induced signal to gather mimic channel and digital circuit required voltage in control integration circuit voltage transitions the input voltage of communication interface 6, and input power and out-put supply are isolated, to prevent that external power source from producing interference by communication interface;

Step 2, sends pumping signal by transtation mission circuit module, and to ultrafine wire, each point of crossing in X-axis, Y-axis discharges and recharges scanning respectively successively, and the matrix signal that scanning is obtained is sent to CPU processing module; Concrete scan mode as shown in Figure 4, by transtation mission circuit module, X1 is sent to pumping signal, scan respectively successively the data-signal of X1 and Y1 point of crossing section, the data-signal of X1 and Y2 point of crossing section, the data-signal of X1 and Y3 point of crossing section, until scan the data-signal of X1 and Yn point of crossing section, complete whole data acquisition on X1 axle.With same scan mode, complete at X2 axle, X3 axle, X4 axle, until data acquisition on Xm axle.Existence due to coupling capacitance, place, point of crossing in every X-axis and Y-axis has just formed an electric capacity, while supposing that on X1 axle time sharing segment sends an amplitude and the fixing sine wave exciting signal of phase place, at X1 axle and Y1 axle, Y2 axle, Y3 axle ... the point of crossing place of Yn axle can produce the induced signal that an amplitude is relevant with coupling capacitance size with the frequency of pumping signal with phase place, now induced signal collection control integration circuit collect X1 axle respectively with Y1 axle, Y2 axle, Y3 axle ... the capacitance of Yn axle point of crossing is called maximum value Vmax;

Step 3, under the control of CPU processing module, the matrix signal that timesharing receives different receiving cables sends to receiving circuit module;

Step 4, receiving circuit module amplifies the matrix signal receiving, rectification and filtering conversion, matrix signal converts data-signal to the most at last, send into CPU processing module and process, formation rule matrix data stream, is sent to calculation control unit 9 by communication interface 6 outputs;

Step 5, staff 2 touches multi-point touch network electromagnetic inductive basic unit 3 and carries out multi-point touch operation, the related data flow information exchange producing is crossed data stream output interface 4 and data stream input interface 5 and is input to induced signal and gathers control integration circuit 7, and induced signal gathers 7 pairs of traffic flow informations of control integration circuit to carry out acquisition and processing and form initial matrix signal and export by communication interface 6; As shown in Figure 4, (or multiple spot more when staff 2 touches the some M on touch-control sensing unit, this sentences this point for giving an example), due to human body be with the conductor of electrostatic induction, can form the contact area that an induction region 1(is more than or equal to finger and touch-control sensing cell surface at touch-control sensing cell surface), in this induction region 1, covered the point of crossing of 6 X-axis and Y-axis, the intersection point M1 that comprises X2 axle Y2 axle, the intersection point M2......X4 axle of X3 axle and Y2 axle and the intersection point M6 of Y3 axle.The capacitance that now induced signal collection control integration circuit collects M1, M2, M3, M4, these 6 point of crossing of M5, M6 will reduce, with M1, give an example, the capacitance of supposing this point of crossing has been reduced to N1, and the data message that can obtain this point by reversion algorithm is Vmax-N1.In like manner obtain the data message of other 5 point of crossing, form initial matrix signal.

Step 6, initial matrix signal is by input interface 8 inputs of calculation control unit 9, by DSP data processor, carry out data processing (DSP data processor can integrate with calculation control unit 9, also can separately outside calculation control unit 9); DSP data processor is by initial matrix signal, and the data message Vmax-N1 of each point of crossing carries out centroid algorithm, calculates the actual position information M of this touch-control.Touch-control driver is converted into by this positional information M the signal that calculation control unit 9 can identify and is transferred to calculation control unit 9, can show that staff touch-control is at the touch control operation of this point.

When having a plurality of staff to carry out touch control operation, as the staff 10 in Fig. 1, staff 11. repeat above-mentioned recognition methods, and be not subject to touch point to count quantitative limitation.

The utility model still has numerous embodiments, and all employing equivalents or equivalent transformation and all technical schemes of forming, within all dropping on protection domain of the present utility model.

Claims

1. an oversize multi-point touch sensing unit, it is characterized in that: comprise a network electromagnetic inductive layer, the two layers of surface basic unit of embedded described network electromagnetic inductive layer, one induced signal being connected with described network electromagnetic inductive layer communication gathers control integration circuit, and described induced signal gathers control integration circuit and is connected with a calculation control unit communication with touch-control driver.

2. a kind of oversize multi-point touch sensing unit according to claim 1, it is characterized in that: described network electromagnetic inductive layer comprises that described ultrafine wire is located mutually insulated in point of crossing by ultrafine wire, the intertwining longitude and latitude netting twine interweaving that form along X-axis and Y-axis coiling respectively.

3. a kind of oversize multi-point touch sensing unit according to claim 2, is characterized in that: the pressing mode of described network electromagnetic inductive layer by spray printing and/or silk-screen and/or impression is embedded among two layers of surface basic unit.

4. a kind of oversize multi-point touch sensing unit according to claim 2, is characterized in that: described network electromagnetic inductive layer is two-layer or two-layer above longitude and latitude netting twine, on every layer of described longitude and latitude netting twine, is coated with insulation course.

5. a kind of oversize multi-point touch sensing unit according to claim 2, is characterized in that: described ultrafine wire comprises nm-class conducting wire and/or plain conductor.

6. a kind of oversize multi-point touch sensing unit according to claim 1, is characterized in that: described surperficial basic unit is flexible and transparent film smooth wallpaper or carpet, clear glass or acrylic board; The thickness of described surperficial basic unit is less than or equal to 10 millimeters; Described surperficial basic unit is plane or curved-surface structure.

7. a kind of oversize multi-point touch sensing unit according to claim 2, is characterized in that: after the ultrafine wire of described network electromagnetic inductive layer collects, by a data stream output interface, gather control integration circuit with a data stream input interface and described induced signal and be connected; Described data stream input interface has the independently ultrafine wire signal output interface of X-axis and Y-axis; Described data stream output interface and data stream input interface are flexible print circuit, electrode or contact pin.

8. a kind of oversize multi-point touch sensing unit according to claim 1, is characterized in that: it is to have the integrated circuit of multi-point touch signals collecting, processing and computer standard output interface function or the circuit main board that integrated circuit combines with P.e.c. that described induced signal gathers control integration circuit; Described induced signal gathers control integration circuit and comprises:

9. a kind of oversize multi-point touch sensing unit according to claim 2, it is characterized in that: described touch-control driver comprises DSP data processor, be used for carrying out multiple spot identification, and the touch-control sensitivity of described touch-control sensing unit and the calibration of threshold values, whether detect described ultrafine wire has broken string and electromagnetic interference (EMI) degree simultaneously.

10. a kind of oversize multi-point touch sensing unit according to claim 9, is characterized in that: described touch-control driver is arranged in the operating system of calculation control unit, or is arranged in the hardware driving device of independently exempting from Installation and Debugging; The operating system of described calculation control unit comprises Linux, Windows or Android.