CN2363316Y - Touch force action point coordinate detection sensor - Google Patents
Touch force action point coordinate detection sensor Download PDFInfo
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- CN2363316Y CN2363316Y CN 98250043 CN98250043U CN2363316Y CN 2363316 Y CN2363316 Y CN 2363316Y CN 98250043 CN98250043 CN 98250043 CN 98250043 U CN98250043 U CN 98250043U CN 2363316 Y CN2363316 Y CN 2363316Y
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- touch pad
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- foil gauge
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Abstract
The utility model relates to a sensing device which is used for detecting touch force action points. The utility model is mainly used for detection sense of a touch force action point coordinate when a touch type data input of a display surface of a display, and input of a touch keyboard and a writing board are carried out. The utility model comprises a touch board the mechanical support of which is realized by four supporting seats which are installed at corners, strain gauges are installed at edges of the touch board and surfaces among supporting seats along edge directions, and the strain of the point which is caused by bending moment which is generated at the edges of the touch board by touch force is detected. Strain values of four edges of an elastic board comprise position coordinate information of touch force action points.
Description
The invention belongs to field of sensing technologies, relate to a kind of application point of the touch force to the tablet surface, promptly the sensing device that detects of the position coordinates of pressure contact point is mainly used in information input aspect in the Computer Multimedia Technology.
For being the sensing object with the vectorial force, by touch force (or is called contact pressure, be referred to as touch force in the present invention) detect sensing, and obtain the apparatus and method of the information of touch point position coordinate, have the technical scheme of determining touch force at display surface now, be a transparent touch screen curtain to be installed in the front of display, and around screen, mechanics sensor more than 3 is installed between screen and the display surface, utilize the equilibrium principle of mechanics again, calculate touch point position, as in the U.S. 3 according to the electric signal of sensor output, 657, No. 475,4,121, No. 049,4,355, No. 202, the technical scheme of being announced in 4,558, No. 757 patents.Since this class scheme need be between transparent screen and display surface sensor installation, so cause the distance between screen and the display surface excessive, produce vision distortion inevitably, the sensation that makes the user have touch not go up; And because touch screen need can be installed on the display by the stationary installations such as framework of rigidity, this has also just increased the weight and volume of whole device, otherwise be difficult to guarantee to fix reliably, also cause the manufacturing of whole device and erected cost high simultaneously.
Another improved technical scheme such as US5,541, No. 372 United States Patent (USP) is announced, supporting seat only is installed between touch screen and display surface, mechanics sensor then is installed on the surface of touch screen.This patent has overcome the shortcoming of above-mentioned prior art preferably, and has described in greater detail a kind of mechanics sensor---and foil gauge is installed in the embodiment in four bights of rectangular touch screen.But this embodiment still has more shortcoming.At first, because foil gauge is installed in four bights of touch screen, supporting seat also is installed in the bight simultaneously, so that the physical dimension of foil gauge can not be very big, otherwise foil gauge will block the content of display screen, and according to theory of mechanics as can be known, near near the strain minimum the supporting seat, this will cause the reduction of detection sensitivity on the touch screen.If raising sensitivity, just must use the size touch screen bigger than display, and this has brought difficulty in the installation of display surface for touch screen, especially when be applied in mobile phone, the palmtop computer equal-volume is little and more obvious on the product that display screen is relatively large the time; Secondly, cornerwise length of display screen is the maximum size in touch screen surface, and foil gauge can not be installed away from the bight of display display surface because of the restriction of screen size, supporting seat, so as can be known according to mechanics principle, when the application point of touch force during near the bight, the size of the strain value of corresponding two foil gauges will differ greatly on the diagonal line by this angle, and this will make touch-screen descend in the resolution of marginal portion.Have, foil gauge is installed by this way, the effect of tangential force can the effect of power be comparable mutually with method during touch, is especially moving contact, as when writing input, this will make the stochastic error of detection increase.
This patent has also been mentioned the mounting means of other two kinds of foil gauges.One is installed in supporting seat on the four edges edge of rectangular touch screen, and foil gauge also sensitive direction is installed in the four edges edge abreast.But this patent does not provide the corresponding mechanics model.Because different mechanical models has different computing method, these mechanical models may be multiple constraint free beam units, and perhaps boundary constraint plate-girder, or surface plate unit or the like may be a statically determinate problem, more may be statically indeterminate problem.The difference of mechanical model will make complexity, calculation procedure that detection signal is handled far from each other, and this patent does not provide corresponding explanation; Have again, if a plurality of supporting seats are installed on every edge, then generally speaking in order to simplify calculating to improve response speed, need to install the foil gauge of close quantity, this has increased manufacturing cost on the one hand, connects between the foil gauge on the other hand, the wiring between foil gauge and the signal processing also is a difficult problem.Its two, " ... and extend with this screen at the edge of touch screen and to be positioned at conplane protrusion, foil gauge distributes and is installed on the protrusion, and the major dimension of each foil gauge parallels with protrusion." in this section is described, still do not provide the concrete mount scheme of foil gauge, do not illustrate that supporting seat is mounted in the bight and also is mounted in the edge yet, and technology contents such as the direction of protrusion, shape; Moreover,, then still have the problem that detection sensitivity is relatively low, wiring is at random if the edge of the installation direction of foil gauge and screen is perpendicular.In addition, above-mentioned various technology all need one independently to touch check-out console, and when using LCD, this piece touch pad is optional in some cases.
Shortcoming at above-mentioned prior art, one object of the present invention is under the situation that keeps the prior art advantage, provide that a kind of mechanical model is clear, structure and mathematic(al) representation be simple, have uniform resolution and good anti-tangential force effect, have the detection sensing device of the touch force application point of range of application more widely simultaneously.Another object of the present invention is on the basis of above-mentioned purpose, provides a kind of display screen of LCD that uses as the structure that touches check-out console.The 3rd purpose of the present invention is on the basis of above-mentioned two purposes, provides the touch force detection architecture scheme with more high detection sensitivity.The 4th purpose of the present invention provides an integrated contact force that comprises that foil gauge is correlated with in being routed in and detects sensing device.
To achieve these goals, the invention provides so a kind of touch detection architecture: between other structural members such as four bights, touch pad and display surfaces of rectangular touchpad or casing, four supporting seats are installed, and the use foil gauge is as the sensor of touch force, foil gauge is installed on the surface of touch pad four edges edge, and its sensitive direction parallels with the edge; When using LCD, can also directly utilize display board itself as touching check-out console.In order to improve the sensitivity of detection, on can one or two surface on every edge of touch pad, a plurality of foil gauges be installed at touch pad; One or more foil gauge that has large-size on sensitive direction perhaps is installed.In order to realize the integrated of whole detection sensing plate, the present invention gives two kinds foil gauge is solidificated in structure on the touch sensing plate with the relevant lead that is connected: a kind of is directly on the directly integrated surface that is solidificated in touch pad of foil gauge and connecting wiring, another kind of structure is foil gauge, connects lead integrated being solidificated on the flexible substrate earlier, and then this substrate is installed or sticked on the surface of touch pad.
The invention has the advantages that: owing to saved installation frame between touch screen and other structural members such as display or casing, so in light weight, production and erected cost are cheap, popularization easy to use, the while has also been improved response speed; Because foil gauge is directly installed or sticked on the touch screen,, both be convenient to transport or carry again so volume is little, thin thickness; Again because the distance between touch pad and the display surface may diminish within the 1mm, so can reduce the collimation error again to greatest extent; The most important, be the mounting structure of this foil gauge, can utilize the area of display edge non-display area fullest, make the installation and the size of foil gauge, no longer too be subjected to the restriction of viewing area and supporting seat, therefore can either obtain higher detection sensitivity, can make the resolution of whole screen more even again; And have more simple mechanics models and a mathematic(al) representation.By explanation, can more clearly see this advantage to back embodiment.Another advantage of the present invention is by integrated, has improved reliability, the consistance of whole detection sensing device, realizes the standardization and the robotization of manufacturing process easily; Because installing along the edge direction of touch pad, foil gauge do not take display area simultaneously, so be more suitable for the manufacturing of the less detection sensing plate of area, easily its range of application has been expanded to the small size display surface palmtop computer, PDA(Personal Digital Assistant), mobile phone touch or write input, perhaps touch keyboard, clipboard etc. do not need the application facet of display surface.
Below in conjunction with accompanying drawing, describe concrete structure of the present invention in detail.
Fig. 1 detects the structural principle synoptic diagram of sensing device
Fig. 2 mechanical model analysis chart
The moment curve on a limit of Fig. 3 touch pad
One group of foil gauge of Fig. 4 is at a kind of scheme of installation at touch pad edge
The long and narrow foil gauge of Fig. 5 is at the scheme of installation at touch pad edge
A kind of integrated touch of Fig. 6 detects the structural representation of sensing plate
A kind of structural representation that uses the integrated detection sensing plate of flexible substrate of Fig. 7
Fig. 1 has provided basic structure of the present invention and ultimate principle.In Fig. 1, the touch pad 101 that bears touch force is installed on four supporting seats 104,105,106,107, and these four supporting seats require to determine to be mounted in the surface of display according to reality, or on casing, base or other structural member.At the edge of this plate four or four groups of foil gauges 108,109,110 and 111 are installed, these foil gauges can be installed on the front 102 or the back side 103 of touch pad 101, and its sensitive direction parallels with the edge of plate; The user the surface that can touch, the surface of bearing touch force in other words is positive 102.F1 among the figure, f2, f3, f4 represent the support reaction of four supporting seats respectively, and F1, F2, F3, F4 then are illustrated in four virtual effect component of touch pad edge and touch force F equivalence.Can use mathematics and method of material mechanics to prove that this decomposition is correct.Fig. 2 has provided the mechanical model analysis chart of this structure.As shown in the figure, foil gauge is installed in the middle part at touch pad edge, with supporting seat 104,105,107 is that axle is set up coordinate system XOY plane rectangular coordinate system, and the moment of flexure that is located at the position at foil gauge place is respectively M1, M2, M3, M4, and the material of touch pad, thickness is uniform, its length is a, width is b, the coordinate of touch force application point is P (x, y), again in conjunction with representative moment curve shown in Figure 3, by in the drawings to A, B, C, D carries out mechanical analysis in four zones, can obtain the coordinate figure x of touch force application point, y and moment M 1, M2, M3, universal relation formula between the M4 is as follows:
Like this, utilize foil gauge to measure after M1, M2, M3, the M4, just can obtain coordinate figure x, the y of touch force application point very simply by calculating.In fact, as long as the foil gauge that touch pad two opposite edges edge is installed or pasted is symmetrical about the central shaft of touch pad, just can access The above results.Do not install even foil gauge is not a symmetry, can utilize method of material mechanics to obtain similar relational expression too.The signal of Fig. 2 is a kind of typical structure, has to install and calculate the simplest advantage.
Shown in Figure 4 is the embodiment that one group of foil gauge is used on a kind of every limit, here 4 foil gauges 401,402,403 and 404 have been pasted at each edge of touch pad, the sensitive direction of foil gauge is with aforesaid identical, can be installed on the surface of touch pad (not drawing among the figure), also be installed in as shown in the figure on two surfaces; Both can install concentratedly, installation can distribute again; But preferably aforesaid symmetric form is installed, to obtain the simplest top relational expression.The advantage of this embodiment is to improve detection sensitivity largely, and realizes Temperature Compensation easily.But this scheme also has shortcoming, needs the line of drawing more exactly, and when using the electric bridge testing circuit of standard, two signal line need be drawn in each edge, can bring certain degree of difficulty to wiring.Relatively Zhe Zhong method is that two foil gauges are installed on every limit, the same one or both sides that are installed in touch pad all can, a signal line only need be drawn in every like this limit, and the detection sensitivity that can double, and realizes temperature compensation easily.The method that another improves detection sensitivity is to use one or one group of several long and narrow foil gauge 501 to replace the foil gauge of common size, installs or sticks on one or two surface at touch pad edge.Fig. 5 has provided the installation situation of a foil gauge.In the present invention, because each edge of touch pad can use one to a plurality of foil gauges, so testing circuit has the different methods of attachment of many kinds, the method for attachment of physical circuit can be implemented with reference to the circuit that books provided of relevant mechanical meaurement.Also have mechanics problem correlation theory and the method that arrives involved in the present invention in these books, the data.
Fig. 6 has provided another embodiment, promptly on the surface of touch pad, utilize methods such as vacuum coating, ion sputtering, chemogenic deposit or corrosion, be similar to the manufacturing process of thick film circuit, sheet resistance or printed circuit board (PCB), directly the synoptic diagram of the embodiment of the foil gauge of the above-mentioned detection usefulness of curing and its connecting wiring on touch pad.The great advantage of this scheme is all to be solidificated in all power leads and signal wire on the surface of touch pad, the various shortcomings that fly line brought have been exempted, even can integrate the part signal treatment circuit, it is long and may introduce interference to faint detection signal to have exempted signal wire.In Fig. 6, to realize connecting by solidifying lead bunches 605 between four or the four groups of foil gauges 601,602,603,604, all input/output terminals are all focused on then unifiedly on the port 606 (can comprise partial circuit) to be connected with signal processing system.Other of integrated curing is also advantageous in that: both realized the standardization and the robotization of production technology easily, guaranteed reliability of products and consistance again easily.
Another integrated morphology as shown in Figure 7, is to use the making printed circuit board method, and foil gauge 702 and connecting wiring 703 are directly fixed on the thin flexible substrate 701 of a slice, is connected with signal processing system by interface 704 again.The substrate here can be a whole shaped as frame, also can be in order to save material by several the long and narrow substrates shaped as frame that is spliced, and then substrate and touch pad 101 bonded together.This integrated morphology is suitable for the touch pad of various materials and form, and the area that is particularly suitable for touch pad is bigger, and perhaps its material can not be born high temperature, but or its surface be not easy to form the situation of the conductive layer of retrofit.
In the ordinary course of things, in order to guarantee certain resistance value, conductor in the foil gauge usually need to use with its connecting wiring with different materials, so for these two kinds of structures, also can use the finished product foil gauge, it is bonded on the touch pad or flexible substrate that has connected up, forms the integrated morphology of solidifying.
In the present invention, the touch pad 101 that is applied in display surface can use transparent material manufacturings such as glass, organic glass, transparent resin, to the basic demand of material be in light weight, intensity is high, scratch resistant property, light transmission are good.In this case, four supporting seats among Fig. 1 just should be installed between touch pad and the display surface.In above-mentioned material, especially suitable to make the transparent resin that eyeglass uses, have minimum proportion, good intensity, anti-scratch performance and high light transmission, and can once-forming, good processing properties is arranged.
If but be applied on the notebook, because notebook all uses dull and stereotyped LCD as display element basically, touch check-out console 101 and further simplified structure so can be used as liquid crystal board itself fully.The condition of this application is that liquid crystal board can not and drive between its circuit board or other structural members such as casing, framework, there is large tracts of land to be fastenedly connected, welding pin for example in a row, large-area bonding, perhaps limit the structures such as framework of its microdeformation, the connection of circuit should be used flexible wire.In brief, require to satisfy mechanical model shown in Figure 1 and supporting condition.In this case, can use patching shown in Figure 7 that foil gauge is installed and be connected lead.
The present invention can also be applied in others, detects aspects such as input, touch keyboard as the clipboard that does not need to show.Under this applicable cases, touch pad 101 can use opaque materials such as metal, pottery, plastics, directly be installed on casing, the base by supporting seat 104,105,106 and 107, perhaps other be installed on casing, the base as on the structural members such as framework, circuit board.When using electron ceramic material as check-out console, can obtain the simplest structure, aforesaid integrated because this material can use the manufacture method of thick film circuit to realize, possess ripe production technology.
Claims (10)
1. a touch force position of action point coordinate that is used for touch force is detected sensing detects sensing device, and this device includes one and is used for the rectangle elasticity touch pad that the user implements touch operation; Four bights at this touch pad are equipped with four supporting seats, and at least four foil gauges are installed on touch pad, it is characterized in that:
Described four foil gauges distribute and are installed on the surface of the four edges edge between the touch pad supporting seat, and the sensitive direction of foil gauge parallels with the edge of touch pad.
2. according to claim 1 described detection sensing device, it is characterized in that: the supporting seat in four bights of touch pad is installed between display surface and the touch pad; Touch pad is formed by the transparent material manufacturing.
3. according to claim 1 described detection sensing device, it is characterized in that: the supporting seat in four bights of touch pad is installed on casing, base or other structural member; Touch pad is a kind of among LCD panel, sheet metal or pottery, the organic material plate.
4. according to claim 1,2 or 3 described detection sensing devices, it is characterized in that: four edges at touch pad respectively are equipped with a foil gauge.
5. according to claim 1,2 or 3 described detection sensing devices, it is characterized in that: on the surface at every edge of touch pad, one group of foil gauge is installed all; At least comprise two foil gauges in every group of foil gauge.
6. according to claim 5 described detection sensing devices, it is characterized in that: described one group of foil gauge is four foil gauges.
7. according to claim 1,2 or 3 described detection sensing devices, it is characterized in that: at touch pad two opposite edges edge, the foil gauge of being installed is symmetrical about the axis of touch pad.
8. according to claim 1,2 or 3 described detection sensing devices, it is characterized in that: each foil gauge of installing is long and narrow foil gauge at four edges of touch pad.
9. according to claim 1,2 or 3 described detection sensing devices, it is characterized in that: being installed in the foil gauge and the connecting line thereof at touch pad edge, is to be made of the conductive film layer attached to touchpad surface.
10. according to claim 1,2 or 3 described detection sensing devices, it is characterized in that: being installed in the foil gauge and the connecting line thereof at touch pad edge, is to be made of the conductive film layer attached to the flexible substrate surface; This flexible substrate is bonded in the surface of touch pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98250043 CN2363316Y (en) | 1998-12-15 | 1998-12-15 | Touch force action point coordinate detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98250043 CN2363316Y (en) | 1998-12-15 | 1998-12-15 | Touch force action point coordinate detection sensor |
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| Publication Number | Publication Date |
|---|---|
| CN2363316Y true CN2363316Y (en) | 2000-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98250043 Expired - Fee Related CN2363316Y (en) | 1998-12-15 | 1998-12-15 | Touch force action point coordinate detection sensor |
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| CN (1) | CN2363316Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381993C (en) * | 2005-02-23 | 2008-04-16 | 刘二中 | Information input apparatus with pressing plate and method thereof |
| CN100426213C (en) * | 2001-03-09 | 2008-10-15 | 伊梅森公司 | Haptic interface for laptop computers and other portable devices |
| CN1898541B (en) * | 2003-12-26 | 2010-05-12 | 丰田自动车株式会社 | Device and method for sensing and displaying convexo concave |
| CN101446871B (en) * | 2007-11-27 | 2011-09-14 | 三星电子株式会社 | Touch pad having electromagnetic interference shielding plate |
| CN101206548B (en) * | 2006-12-19 | 2012-01-11 | 北京汇冠新技术股份有限公司 | Infrared touch panel triggered using touch force and detecting method thereof |
| CN101833388B (en) * | 2009-03-13 | 2012-02-29 | 北京京东方光电科技有限公司 | Touch display and method for determining positions of touch points |
| CN102520392A (en) * | 2000-07-28 | 2012-06-27 | N-特莱格有限公司 | Physical object location apparatus and method and a platform using the same |
| CN109883315A (en) * | 2019-03-22 | 2019-06-14 | 中国科学院力学研究所 | A kind of two-sided resistance strain and strain measurement method |
| CN109883316A (en) * | 2019-03-22 | 2019-06-14 | 中国科学院力学研究所 | A kind of resistance strain and strain measurement method |
-
1998
- 1998-12-15 CN CN 98250043 patent/CN2363316Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520392A (en) * | 2000-07-28 | 2012-06-27 | N-特莱格有限公司 | Physical object location apparatus and method and a platform using the same |
| CN102520392B (en) * | 2000-07-28 | 2014-11-26 | N-特莱格有限公司 | Physical object location apparatus and method and a platform using the same |
| CN100426213C (en) * | 2001-03-09 | 2008-10-15 | 伊梅森公司 | Haptic interface for laptop computers and other portable devices |
| CN1898541B (en) * | 2003-12-26 | 2010-05-12 | 丰田自动车株式会社 | Device and method for sensing and displaying convexo concave |
| CN100381993C (en) * | 2005-02-23 | 2008-04-16 | 刘二中 | Information input apparatus with pressing plate and method thereof |
| CN101206548B (en) * | 2006-12-19 | 2012-01-11 | 北京汇冠新技术股份有限公司 | Infrared touch panel triggered using touch force and detecting method thereof |
| CN101446871B (en) * | 2007-11-27 | 2011-09-14 | 三星电子株式会社 | Touch pad having electromagnetic interference shielding plate |
| CN101833388B (en) * | 2009-03-13 | 2012-02-29 | 北京京东方光电科技有限公司 | Touch display and method for determining positions of touch points |
| CN109883315A (en) * | 2019-03-22 | 2019-06-14 | 中国科学院力学研究所 | A kind of two-sided resistance strain and strain measurement method |
| CN109883316A (en) * | 2019-03-22 | 2019-06-14 | 中国科学院力学研究所 | A kind of resistance strain and strain measurement method |
| CN109883315B (en) * | 2019-03-22 | 2021-01-01 | 中国科学院力学研究所 | Double-sided resistance type strain sensor and strain measurement method |
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