CN101071354B - Force and location sensitive display - Google Patents
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- CN101071354B CN101071354B CN2007100898109A CN200710089810A CN101071354B CN 101071354 B CN101071354 B CN 101071354B CN 2007100898109 A CN2007100898109 A CN 2007100898109A CN 200710089810 A CN200710089810 A CN 200710089810A CN 101071354 B CN101071354 B CN 101071354B
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Abstract
A unit to provide both force and location detection includes a first transparent substrate (having first and second sets of conductive traces oriented in a first direction), a second transparent substrate (having a third set of conductive traces oriented in a second direction) and a plurality of deformable members ( e.g ., rubber beads) arranged between the first and second transparent substrates. The first set of conductive traces, in combination with the conductive traces of the second transparent element, provide a capacitance signal representing where a user touches the display element. The second set of conductive traces, in combination with the conductive traces of the second transparent element, provide a capacitance signal representing the amount of force applied to the display element. When used with a display element ( e.g. , a LCD or CRT), an input-output unit capable of both location sensing and force sensing operations is provided.
Description
The application requires to incorporate these applications in the right of priority of the U.S. Patent application that is entitled as " Multipoint Touchscreen " of the U.S. Patent application that is entitled as " Force imaging InputDevice and System " of submission on March 30th, 2006 and submission on May 6th, 2004 by reference at this.
Technical field
Present invention relates in general to the electronic system input and output device, more specifically, relate to the touch that detects the user and the display device (output) of touch force (input).
Background technology
The current input equipment that is used for many types of operating that exists in computer system.These operations are usually included on the display screen moving cursor and/or select.For example, input equipment can comprise button or keyboard, mouse, tracking ball, touch pad, operating rod and touch-screen.Particularly, touch-screen because its easy operating and operating multifunction with and more and more lower price and become more prevalent.Touch-screen makes the user to select and moving cursor by simply via finger or felt pen touch display screen.Usually, touch-screen identifies this touch and the position of this touch on display screen, and computer system resolves this touch, moves based on this touch event subsequently.
Touch-screen generally comprises touch panel, controller and software driver.Touch panel is to have the transparent panel that touches sensitive surfaces, and so that touches the front that the mode of the viewing area of sensitive surfaces covering display screen is placed at display screen.Touch panel registers touch events and these signals are sent to controller.Controller is handled these signals and data is sent to computer system.Software driver resolves to the computing machine incident with touch event.
Polytype touch screen technology is arranged, comprise resistor-type, capacitor type, infra red type, surface acoustic wave type, electromagnetic type, near field imaging-type etc.In these equipment each all has merits and demerits, will consider these merits and demerits when design or configuration touch-screen.In the resistor-type technology, touch panel is coated with thin conductive metal and resistive layer.When touching this panel, these layers contact, closed thus one " switch ", the position of this record touch event.This information is sent to controller further to handle.In the capacitor type technology, touch panel is coated with the material that electric charge is stored.When touching this panel, a little charge is drawn to the contact.With cooperate the together circuit measuring electric charge of (co-located) of this panel, and this information sent to controller to handle.
In the surface acoustic wave type technology, for example on touch panel, send ultrasound wave horizontally and vertically by transducer.When touching this panel, the acoustic energy of these ripples is absorbed.The sensor that is positioned at the transducer opposite sends to controller to handle to this variation and with this information.In the infra red type technology, for example on touch panel, send light beam horizontally and vertically by light emitting diode.When touching this panel, some light beam that sends from light emitting diode is interrupted.The photodetector that is positioned at the light emitting diode opposite detects this variation and this information is sent to controller to handle.
A shortcoming of these technology is that they do not provide pressure or force information usually.Force information can be used for obtaining the how indication of the more robust of controlling equipment for the user.That is, can be with force information as another input unit (dimension), with will instruct with control signal offer associated electronic device (as, handwriting pad (tablet) computer system, personal digital assistant or cell phone).Another problem of these technology is: even be placed with a plurality of objects on sensitive surface, they also can only report a single point.That is, they can't follow the tracks of a plurality of contacts simultaneously.Thus, it will be favourable that following input and display device is provided, this input and display device not only senses touch the position but also detect the power that applies this touch.
Summary of the invention
The device of a kind of power of providing and position probing comprises: first transparent substrates (having first group and second group of conducting wire being oriented to first direction); Second transparent substrates (the 3rd group of conducting wire) with the second direction of being oriented to; And and place a plurality of deformable assemblies (as rubber washer (rubber bead)) between first transparent substrates and second transparent substrates.First group of conducting wire is configured to provide a capacitance signal with the combining of conducting wire of second transparent element, and this capacitance signal represents that the user touches the position of display element.Second group of conducting wire is configured to provide a capacitance signal with the combining of conducting wire of second transparent element, and this capacitance signal represents to be applied to the amount of the power of display element.In one embodiment, second transparent substrates comprises more than the 4th conducting wire (being oriented to second direction), and the group of more than the 3rd conducting wire is separated in every pair of conducting wire wherein.In another embodiment, second transparent substrates forms obturator, and this obturator can be filled with liquid to alleviate the visual problem of Crumple element.Described power and position induction device can in abutting connection with display element (as, LCD or CRT) so that display device can provide the induction of location sensitive and power.
Description of drawings
Fig. 1 shows display device according to an embodiment of the invention with the form of block diagram.
Fig. 2 shows power and touch unit according to an embodiment of the invention with the form of block diagram.
Fig. 3 A and 3B show the various views of compressible medium element (media element) according to an embodiment of the invention.
Fig. 4 shows the layout of conducting wire according to an embodiment of the invention.
Fig. 5 A and 5B show the zoomed-in view of structure shown in Figure 4.
Fig. 6 shows power and touch sensitive dis-play according to an embodiment of the invention with schematic form.
Embodiment
Carry out following description so that those skilled in the art can carry out and utilize claims of the present invention, and following description is to provide at the concrete example of discussing below, its various modification are conspicuous for those skilled in the art.Therefore, claims are not limited to the disclosed embodiments, but can be according to the wide region consistent with principle disclosed herein and feature.
With reference to Fig. 1, power and lever position indicator 100 comprise according to an embodiment of the invention: novel power and touch unit 105, display element 110 and controller 115.As directed, unit 105 also places the front (from user 120 visual angle) of display element 110.For example, unit 105 can be laminated to the front of display element 110.Illustrated display element 110 includes but not limited to various types of LCD (" LCD "), plasma display and cathode-ray tube (CRT) (" CRT ").From function, controller 115 is that with the similar part of prior art controller it provides signal to come driver element 105, and will be delivered to the principal computer (not shown) by 105 signals that receive from the unit, and/or handle this signal.The position of these signal indications user 120 touch displays 100, and how much power user 120 uses touch.In another embodiment, display device 100 may comprise for example polarizer element between unit 105 and display element 110.Alternative, the polarizer can be positioned at 105 outsides, unit to improve observed display element contrast.
With reference to Fig. 2, the power of the novelty of Fig. 1 and touch unit 105 comprise first and second transparent substrates (200 and 205), a surface in each substrate all with the pattern adjacency of conducting wire (210 and 215), and these two substrates are separated by body 220.Body 220 comprises a plurality of compressible medium elements 225, and this makes that substrate 200 and 205 moves closelyer each other when user 120 pushes on display 100.Combine with the drive signal of coming self-controller 115 (referring to Fig. 1) and conducting wire 210 and 215, along with the variation at the interval between substrate 200 and 205, the mutual capacitance between the circuit 210 and 215 also changes.The variation of controller 115 detected capacitance signals has been represented the position of user's 120 touch displays 100 and has been used how much power.
In one embodiment, transparent substrates 200 and 205 comprises glass or optically transparent plastics, and thickness can be the general type of using in LCD between about 0.3 to 0.5 millimeter (" mm ").Conducting wire 210 and 215 comprises through the tin indium oxide of composition or certain other optical clear or semi-transparent conductor.Compressible medium element 225 for example can comprise the polyurethane or the silica gel rubber of elastic body round dot (elastomer dot) or packing ring form.
Have been found that can by use above-mentioned thickness and with a plurality of glass substrate that the separating distance between about 2 to 20 microns (" μ m ") is opened, easily detect the capacitance variations between conducting wire 210 and 215.Therefore, in one embodiment, compressible medium element 225 comprises the elastic body round dot in leap gap of 205 (minimum thickness for conducting wire 210 and 215) from substrate 200 to substrate.For example, if substrate 200 separates 10 μ m with substrate 205, then the compressible medium element can be arranged shown in Fig. 3 A and 3B and separate.In one embodiment, can be via photoetching or silk-screen process with the compressible medium element application in substrate 200 or 205.In another embodiment, can with the compressible medium element application in substrate 200 and 205 both.In realize back one, go up the round dot that forms or packing ring at first substrate (as substrate 200) and can and be placed at second substrate (as substrate 205) and go up between the round dot or packing ring that forms, thereby construct the illustrated pattern of Fig. 3 together.It should be recognized by those skilled in the art that and under the situation that does not break away from notion described herein, can adopt other pattern.
In one embodiment, though and nonessential, body 220 can seal, is full of zone between substrate 200 (and conducting wire 210) and the substrate 205 (and conducting wire 215) with the permission fluid.The refractive index that an advantage of this configuration is a fluid can be complementary with the refractive index of compressible medium element.Like this, snell law guarantees that the compressible medium element will be rendered as the sight line disappearance from the user, and the result can not make user's sight line scatter from the object that is present on the display element 110.A kind of exemplary optical fluid is the SL-5267 of SantoLight.Persons of ordinary skill in the art will recognize that the film reflectance coating to be coated on each interface, to reduce light loss and to alleviate the refraction distortion.Exemplary anti-reflection coating can comprise magnesium fluoride, aluminium oxide etc., and generally can apply the thickness of about 50 to 200 nanometers.
With reference to Fig. 4, show the layout of conducting wire 210 according to an embodiment of the invention and 215.In illustrated embodiment, " top " circuit 210 (that is, from the nearest circuit of user 120) comprises multirow pixel plate 400, drives framework 405 and reverse drive line 410, wherein each element all with the regional electrical isolation that does not have conductive material 415." bottom " circuit 215 (that is, from user 120 circuit farthest) comprise the line of induction related (420) with the power detecting operation and with the line of induction (425) of position probing operative association.As shown in the embodiment illustrated, each power detection line 420 has o pads (430,435 and 440), and a plurality of position probing circuit 425 is shared public o pads (445 and 450).
With reference to Fig. 5 A and 5B, provide the more detailed view of the structure of Fig. 4.For an embodiment, in table 1, enumerated the size ' a ' that is identified among Fig. 5 A and Fig. 5 B and arrived ' h '.
Table 1 exemplary dimensions
Will be appreciated that the accurate dimension of each element is can be by the size and the definite design result of expectation resolution of viewing area (as installing 100).The conducting wire 210 (as circuit 425) and 220 (as the circuits 430 and 435) that it should also be appreciated that overlapping form the capacity cell of operating in the mode of above-mentioned unexamined patent application description.
Should be noted that in the illustrated structure of Figure 4 and 5 circuit 210 has covered a surface of transparent substrates 200 substantially, and 215 in circuit has covered a surface of transparent substrates 205 minimumly.Thereby the user may see that the vision puppet that causes owing to differing from of the refractive index between the surface of the surface of substrate 200 and substrate 205 resembles, and wherein the surface of substrate 200 is covered by the conducting wire basically, and the surface of substrate 205 is only covered minimumly.Resemble in order to reduce these vision puppets, have been found that with the refractive index of conducting wire material similarly transparent the or translucent conducting wire material surface that covers substrate 205 continuously will be favourable.For example, the same surface that comprises circuit 215 (as circuit 420 and 425) of substrate 205 may be coated with same conductive material, as long as this coating and circuit 215 electrical isolations.This can be by for example providing insulation course (as 415) to realize around each circuit 215.Other exemplary materials that is suitable for this purpose includes but not limited to the optiNDEX (polymer coating) of aluminium oxide, scandium oxide or Brewer Science.
With reference to Fig. 6, show the part of power and location sensitive display device with schematic form.According to one embodiment of present invention, during operation, a plurality of reverse drive lines of driving circuit 605 actuated in sequence and drive each combination of framework, simultaneously via the strong and position line related of sensor circuit 610 inductions institute.For example, at very first time section (T
1) during, utilize the pulse train of first polarity that reverse drive line 615 and 620 is driven, utilize the pulse train of opposite polarity to drive simultaneously to driving framework 630.When carrying out this operation, sensor circuit 610 " reads " or all its each inputs that list of sensitive display.At the second time period (T
2) during, utilize the pulse train of first polarity that reverse drive line 620 and 625 is driven, utilize the pulse train of opposite polarity to drive simultaneously to driving framework 635.At time period T
2During this time, sensor circuit 610 reads its each input once more.Repeat this and handle, all provisional capitals in display unit are driven, and after this, repeat this processing.As described, each pixel produce a signal relevant with position measurement (as, by public induction bonding pad 445), and two signals relevant with the power measurement (as, from pad 430 and 435).In one embodiment, use the mean value of ergometry signal as " described " force signal.In another embodiment, use the maximal value (or minimum value) of these two signals.
In one embodiment, each pulse train comprises 12 pulses (0 to 18 volt), has 50% dutycycle, and the frequency between about 100 and 300 KHz (" KHz ").In the embodiment of Fig. 6, sensor circuit 610 is illustrated as reading simultaneously all row inputs.Yet, will be appreciated that this is also nonessential.For example, the operation that row in the inductance capacitance signal changes can be re-used, so that for each the row (as, reverse drive line 615 and 620 and drive framework 640), induction first row during very first time section, and induction second portion row or the like are sensed up to all row during second time period.After finishing this processing, can encourage next group reverse drive line and drive framework.
According to the present invention, during each scan operation, Fig. 4,5 and 6 exemplary architecture provide two values (as mentioned above) for each pixel.The electric capacity that first value representation causes owing to the position of user's touch display unit.This value should be independent of power as far as possible.Second value representation is applied to the power of display device.This value should be independent of the position of the power of applying as far as possible.The arrangement that drives framework 405, reverse drive line 410 and the line of induction 420 and 425 is arranged to this independence is provided.For example, will be appreciated that, driving framework (as 405) and power output line (as, one of conductive path 420) mutual capacitance between directly with they the overlapping area (as, 30 μ m * 4.5mm) be directly proportional, and with the plate interval (as, being 10 μ m when not having power, is 7 μ m when all one's effort) be inversely proportional to.For each reverse drive line also is like this.Yet, because utilize the signal of opposite polarity to drive to driving framework and reverse drive line, so they tend to mutual neutralization (that is during, different polarity is tended to and the induction path with drive between the framework and responding to the electric charge that shifts between path and the reverse drive framework).Thus, in illustrated embodiment, the reverse drive line is used to eliminate some electric charge transfer that overlaps and cause owing to location sensitive path 425 and " leg " that drive framework 405.Thus, use the reverse drive line to guarantee that position and power output signal are essentially independent.
Under the situation of the scope that does not break away from claims, can aspect the details of material, parts, circuit component and illustrated method of operating, carry out various variations.
Claims (51)
1. power and touch sensible parts comprise:
First hyaline layer;
Second hyaline layer;
First conducting wire is with the first surface adjacency of first hyaline layer;
Second conducting wire is with the second surface adjacency of second hyaline layer; And
The deformable assembly is inserted between first hyaline layer and second hyaline layer, wherein
First conducting wire and second conducting wire are configured to generate first group of signal that the power that is applied to first hyaline layer is indicated in second conducting wire first group, and generate second group of signal that the position of the power that applies on first hyaline layer is indicated in second conducting wire second group.
2. parts according to claim 1, wherein first hyaline layer and second hyaline layer comprise glass.
3. parts according to claim 1, wherein first conducting wire is oriented to first direction, and second conducting wire is oriented to second direction.
4. parts according to claim 3, wherein first direction is vertical substantially with second direction.
5. parts according to claim 1, wherein second conducting wire comprises:
First group of conducting wire is exclusively used in the signal that detection is indicated the power that is applied to first hyaline layer; And
Second group of conducting wire is exclusively used in the signal that detection is indicated the position that applies power.
6. parts according to claim 1, wherein first hyaline layer and second hyaline layer comprise seal.
7. parts according to claim 6, wherein seal is full of the fluid with a refractive index substantially.
8. parts according to claim 7, wherein the refractive index of fluid equals the refractive index of deformable assembly substantially.
9. parts according to claim 1 further comprise polarizer element, at least one surperficial adjacency of itself and first hyaline layer and second hyaline layer, and wherein said at least one surface is surperficial relative with first conducting wire or second conducting wire institute adjacency.
10. parts according to claim 9, wherein polarizer element comprises optical coating.
11. power and location sensitive touch parts, comprising:
First hyaline layer;
Second hyaline layer;
More than first conducting wire is oriented to first direction and the first surface with first hyaline layer is adjacent basically;
More than second conducting wire is oriented to second direction and the first surface with second hyaline layer is adjacent basically;
More than the 3rd conducting wire, be oriented to second direction, and the first surface with second hyaline layer is adjacent basically, and with the insulation of more than second conducting wire, one or more in described more than the 3rd conducting wire be disposed in more than second conducting wire in succession between the conducting wire; And
A plurality of deformable assemblies, and place between the first surface of the first surface of first hyaline layer and second hyaline layer,
Wherein, more than first conducting wire and more than second conducting wire are suitable for providing the indication for the power of the first surface that is applied to first hyaline layer, and more than first conducting wire and more than the 3rd conducting wire are suitable for providing the indication for the position of the power that applies on first hyaline layer.
12. power according to claim 11 and location sensitive touch parts, each in wherein said more than first conducting wire comprise the first that is suitable for receiving drive signal and with a plurality of second portions of first's electrical isolation.
13. power according to claim 12 and location sensitive touch parts, wherein drive signal comprises the pulse train of finite time section.
14. power according to claim 12 and location sensitive touch parts, wherein each in more than first conducting wire is suitable for receiving drive signal during time period that other conducting wire in described more than first conducting wire do not receive drive signal.
15. power according to claim 11 and location sensitive touch parts, further comprise more than the 4th conducting wire, be oriented to first direction and the second surface with first hyaline layer is adjacent basically, each in wherein said more than the 4th conducting wire be disposed in more than first conducting wire in succession between the conducting wire.
16. power according to claim 15 and location sensitive touch parts, wherein each in more than first conducting wire is suitable for receiving first drive signal with first polarity, and in more than the 4th conducting wire each is suitable for receiving second drive signal with second polarity.
17. power according to claim 16 and location sensitive touch parts, each in wherein said more than first conducting wire is suitable for receiving first drive signal during time period that other conducting wire in described more than first conducting wire do not receive first drive signal.
18. power according to claim 17 and location sensitive touch parts, wherein a pair of conducting wire in succession in more than the 4th conducting wire only is suitable for being arranged in described a pair ofly in succession when a conducting wire between the conducting wire receives first drive signal in more than first conducting wire, just receives second drive signal.
19. power according to claim 11 and location sensitive touch parts, wherein the deformable assembly comprises rubber.
20. power according to claim 11 and location sensitive touch parts, wherein the deformable assembly comprises room temperture rubber vulcanization.
21. power according to claim 11 and location sensitive touch parts, wherein the deformable assembly comprises silica gel.
22. power according to claim 11 and location sensitive touch parts, wherein the deformable assembly comprises the photocuring elastic body.
23. power according to claim 11 and location sensitive touch parts, wherein first hyaline layer and second hyaline layer form obturator.
24. power according to claim 23 and location sensitive touch parts, wherein the first surface of the first surface of first hyaline layer and second hyaline layer is in the inside of obturator.
25. power according to claim 23 and location sensitive touch parts, further comprise the fluid that is full of obturator.
26. power according to claim 25 and location sensitive touch parts, wherein fluid has the refractive index refractive index about equally with the deformable assembly.
27. power according to claim 25 and location sensitive touch parts, wherein fluid comprises the fluid that refractive index is similar to the refractive index of deformable assembly.
28. power according to claim 11 and location sensitive touch parts, further comprise the dielectric material of the first surface that has covered first hyaline layer substantially, described dielectric material has the refractive index refractive index about equally with more than first conducting wire.
29. power according to claim 28 and location sensitive touch parts, wherein the composition material of more than first conducting wire comprises tin indium oxide, and dielectric material comprises aluminium oxide.
30. power according to claim 11 and location sensitive touch parts, the dielectric material that further comprises the first surface that has covered second hyaline layer basically, described dielectric material have the refractive index refractive index about equally with more than second conducting wire and more than the 3rd conducting wire.
31. power according to claim 30 and location sensitive touch parts, wherein the composition material of more than second conducting wire and more than the 3rd conducting wire comprises tin indium oxide, and dielectric material comprises aluminium oxide.
32. power according to claim 11 and location sensitive touch parts, wherein first hyaline layer and second hyaline layer comprise glass.
33. a display device comprises:
Display element; And
Touch parts with the surperficial bonding power and the location sensitive of display element according to claim 11.
34. display device according to claim 33, wherein display element comprises LCD.
35. display device according to claim 33, wherein display element comprises cathode-ray tube (CRT).
36. display device according to claim 33, wherein display element comprises plasma display.
37. display device according to claim 33 further comprises and places display element and power and location sensitive to touch polarizer element between the parts.
38. power and location sensitive parts comprise:
First transparent substrates has more than first conductive path and more than second conductive path of the separation that is oriented to first direction;
Second transparent substrates, more than the 3rd conductive path with the second direction of being oriented to; And
The deformable assembly, and place between first transparent substrates and second transparent substrates and separate first transparent substrates and second transparent substrates, wherein
More than first conductive path and more than the 3rd conductive path are configured to generate the capacitance signal of the position that the expression user touches on display device, and more than second conductive path and more than the 3rd conductive path are configured to generate the capacitance signal that the expression user is applied to the power of display device.
39., further comprise display element with the first transparent substrates adjacency according to described power of claim 38 and location sensitive parts.
40. according to described power of claim 39 and location sensitive parts, wherein display element comprises liquid crystal display cells.
41. according to described power of claim 38 and location sensitive parts, wherein more than first conductive path comprises a plurality of electrical isolations path, and one or more more than second conductive path arranged between these electrical isolation paths.
42. according to described power of claim 41 and location sensitive parts, the electrically insulated from one another all of each in more than first conductive path wherein, and all described one or more all electric coupling of more than second conductive path between in more than first conductive path each.
43. according to described power of claim 38 and location sensitive parts, wherein second transparent substrates further comprises more than the 4th conductive path, be oriented to second direction and with more than the 3rd conductive path electrical isolation.
44. according to described power of claim 43 and location sensitive parts, wherein in more than the 4th conductive path is separated from one another with more than the 3rd conductive path.
45. according to described power of claim 43 and location sensitive parts, wherein more than the 3rd conductive path is configured to be driven by the voltage signal with first polarity, and more than the 4th conductive path is configured to be driven by the voltage signal with second polarity.
46. according to described power of claim 38 and location sensitive parts, wherein more than first conductive path, more than second conductive path and more than the 3rd conductive path comprise tin indium oxide.
47. according to described power of claim 38 and location sensitive parts, wherein the deformable assembly comprises rubber.
48., further comprise and place the polarizer between the display element and first transparent substrates according to described power of claim 39 and location sensitive parts.
49. according to described power of claim 38 and location sensitive parts, wherein first transparent substrates and second transparent substrates comprise obturator.
50., further comprise the liquid that is full of obturator basically according to described power of claim 49 and location sensitive parts.
51. according to described power of claim 50 and location sensitive parts, wherein liquid has the refractive index of the refractive index that is substantially equal to the deformable assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/382,402 | 2006-05-09 | ||
| US11/382,402 US7511702B2 (en) | 2006-03-30 | 2006-05-09 | Force and location sensitive display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101071354A CN101071354A (en) | 2007-11-14 |
| CN101071354B true CN101071354B (en) | 2010-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100898109A Active CN101071354B (en) | 2006-05-09 | 2007-03-30 | Force and location sensitive display |
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| Country | Link |
|---|---|
| JP (2) | JP4654211B2 (en) |
| CN (1) | CN101071354B (en) |
| HK (1) | HK1114430A1 (en) |
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| JP2011034600A (en) | 2011-02-17 |
| HK1114430A1 (en) | 2008-10-31 |
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