CN104375726A - Capacitive projected capacitive touch panel - Google Patents
Capacitive projected capacitive touch panel Download PDFInfo
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- CN104375726A CN104375726A CN201410633714.6A CN201410633714A CN104375726A CN 104375726 A CN104375726 A CN 104375726A CN 201410633714 A CN201410633714 A CN 201410633714A CN 104375726 A CN104375726 A CN 104375726A
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- touch panel
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a capacitive projected capacitive touch panel and belongs to a touch screen. The touch panel comprises a plurality of slender drive electrodes, characteristic intervals formed between the adjacent slender drive electrodes, a plurality of slender sensing electrodes and characteristic intervals formed between the adjacent slender sensing electrodes, wherein the drive electrodes are set to be close to one another, the slender sensing electrodes are set to be close to one another by crossing over the slender drive electrodes, and the characteristic intervals formed between the slender sensing electrodes at least are larger than those formed between the slender drive electrodes basically. In some embodiments, the sensing electrodes can have intervals based on finger touch diameters. When styluses are used among the intervals between the adjacent sensing electrodes, the touch panel, such as a capacitor between the styluses and a protrusion, can sense the styluses with touch diameters which are basically smaller than the finger touch diameters.
Description
Technical field
The present invention relates to a kind of touch-screen, in particular, the present invention relates generally to a kind of condenser type projected capacitive touch panel.
Background technology
Touch panel is a kind of man-machine interface (HMI), and it allows the operator of electronic installation to use the instrument of such as finger, pointer etc. that input information is supplied to this electronic installation.Such as, operator can use his or her finger to manipulate the image on electronic console, and described electronic console is such as attached to the display of mobile computing device, personal computer (PC) or is connected to the terminal of network.In some cases, operator can use two or more finger to provide special instruction simultaneously, such as: the amplification instruction performed by making two fingers move away from each other; What perform by making two fingers move towards each other reduces instruction; Etc..Touch-screen is a kind of electronic visual display, and its combination overlies the touch panel of display to detect existence and/or the position of the touch in on-screen display (osd) area.Touch-screen is common in the device of such as Integral computer, flat computer, Satellite Navigation Set, game device and smart mobile phone.Touch-screen enable operator directly with the information interaction shown by the display underlying touch panel, instead of indirectly with the pointer interaction controlled by mouse or touch pad.Capacitive touch panel often uses together with touch panel device.Capacitive touch panel comprises the insulator of such as glass substantially, and described insulator is applied by the transparent conductor of such as indium tin oxide (ITO).Because human body is also electric conductor, so the surface of touch panel will cause the distortion of the electrostatic field of panel. this distortion can measure into the change of electric capacity.
Summary of the invention
An object of the present invention is to solve above-mentioned deficiency, provides a kind of condenser type projected capacitive touch panel.
For solving above-mentioned technical matters, the present invention by the following technical solutions:
A kind of projecting type capacitor touch panel provided by the present invention, described touch panel comprises: multiple slender type drive electrode, it is configured to mutually adjacent, and the significant interval between the adjacent elongate drive electrode being included in described multiple slender type drive electrode; Multiple slender type sensing electrode, it is mutually adjacent that it is configured to cross over described multiple slender type drive electrode, and the significant interval between the adjacent elongate sensing electrode being included in described multiple slender type sensing electrode, significant interval between described multiple slender type sensing electrode is greater than the significant interval between multiple slender type drive electrode at least substantially, and described multiple slender type sensing electrode comprises the multiple projections in the interval between the adjacent elongate sensing electrode projecting into described multiple slender type sensing electrode.
As preferably, further technical scheme is: described multiple slender type sensing electrode comprises the spacing of at least five millimeters.
Further technical scheme is: each of described multiple projection is tapered away from described multiple slender type sensing electrode.
Further technical scheme is: described multiple projection extends beyond the center line limited between the adjacent elongate sensing electrode of described multiple slender type sensing electrode.
Further technical scheme is: described multiple slender type drive electrode comprises multiple second projections in the interval between the adjacent elongate drive electrode projecting into described multiple slender type drive electrode.
Further technical scheme is: each of described multiple second projection is tapered away from described multiple slender type drive electrode.
Further technical scheme is: described multiple second projection extends beyond the center line limited between the adjacent elongate drive electrode of described multiple slender type drive electrode.
Compared with prior art, one of beneficial effect of the present invention is: its use the composition of such as geometric scheme for pointer and finger both spatial resolution is provided.In one or more embodiments, capacitive touch panel comprises multiple slender type drive electrode, and they are configured to mutually adjacent and have significant interval between adjacent driven electrode.Capacitive touch panel also comprises multiple slender type sensing electrode, and it is mutually adjacent and have significant interval between neighboring sensor electrode that they are configured to cross over described multiple drive electrode.Significant interval between multiple sensing electrode can be greater than the significant interval between multiple drive electrode at least substantially.Drive electrode and/or sensing electrode comprise the projection in the interval stretched between adjacent electrode.In certain embodiments, described multiple sensing electrode can have the spacing based on finger touch diameter, wherein, when in multiple intervals of pointer between neighboring sensor electrode by use time, touch panel (such as, due to the electric capacity between pointer and projection) can sense the pointer touching diameter and be substantially less than finger touch diameter.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the electrode trace for touch panel, shows the curve map of the response produced when instrument moves past the sensing electrode of touch panel in the X direction relative to the X-axis line of curve map;
Fig. 2 is the schematic diagram of the electrode for touch panel, shows the curve map of the response produced when instrument moves past the sensing electrode of touch panel in the X direction relative to the X-axis line of curve map;
Fig. 3 be in one embodiment of the invention have the touch panel unit of the touch panel of sensing electrode and drive electrode etc. axonometric exploded view;
Fig. 4 A be in one embodiment of the invention for the sensing electrode of touch panel and the plan view from above of drive electrode;
Fig. 4 B is the plan view from above of the sensing electrode for touch panel in one embodiment of the invention;
Fig. 4 C be in one embodiment of the invention for the sensing electrode of touch panel and the plan view from above of drive electrode;
Fig. 4 D be in one embodiment of the invention for the sensing electrode of touch panel and the plan view from above of drive electrode;
Fig. 4 E be in one embodiment of the invention for the sensing electrode of touch panel and the plan view from above of drive electrode;
Fig. 5 A and 5B is the multiple parts for the sensing electrode of touch panel and the plan view from above of drive electrode in one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated.
The ITO pattern that X-axis and Y-axis are intersected in coordinate uses usually in based on mutual capacitance type projected capacitive touch panel.For the capacitive touch panel being used to finger sensing touch, the ITO interval between parallel traces (vertical trace/row trace and horizontal trace/row traces) is less than the diameter of finger.Because the touch diameter of finger at about five millimeters in the scope of ten millimeters (5mm-lOmm), so ITO interval is less than five millimeters (5mm) usually, enough touch degree of accuracy are provided for the touch for one or more finger, and the touch that power comprises two or more finger provides enough resolution (such as, when pointing to separate from the distance of center to center about 10.5 millimeters (10. 5mm)).
Usually it is desirable for allow the operator of touch panel to use such as pointer write accessory, described in write accessory and comprise diameter and be less than the sharp-pointed end of the cardinal principle of finger.But, the pointer of diameter is touched in order to support to have such as about one to two millimeter (Imm-2mm), use the response of the touch panel at five millimeters of (5mm) ITO intervals can not may be accepted due to following reason: to exist in a large amount of " dead band ", or touch coordinate along with pointer location change and/or pointer signal too weak and can not be not measured between adjacent column region, make the touch coordinate calculated have very large saltus step and uncontinuity.
Such as, with reference to figure 1, touch panel has and the capacity coupled sensing trace 56 of driving trace 58, and move past described touch panel along with having the instrument touching profile 50, the response of sensing trace 56 will reduce fast when instrument moves between each sensing trace.Such as from adjacent electrode signal between point of crossing 52 drop to the noise threshold 54 lower than touch panel time, this can cause dropout and/or provide the signal being unsuitable for interpolation.
For large-scale touch panel, the spacing making the trace used in row and column maintain five millimeters (5mm) is unpractical, because the quantity of trace becomes very many, and described trace will need more touch control circuits (such as, more multiple driver and relevant digital-to-analogue (D/A) circuit, more low noises amplify (LNA) circuit and/or more multimode number conversion (ADC) circuit).For touch panel, making spacing be greater than about five millimeters (5mm) will similarly cause can not fully following the tracks of as above the situation of finger touch, and this can with reference to situation when following the tracks of pointer on the touch panel pointing adapted.
Therefore, describe a kind of touch panel, its use the composition of such as geometric scheme for pointer and finger both spatial resolution is provided.The quantity that the capacitive touch panel configured according to the disclosure can allow pointer to use together with following touch panel but not increase row in capacitive touch panel and/or arrange, described touch panel has for the row of finger configuration and/or the interval between arranging.Such as, by using the geometric scheme of described ITO, the ITO trace spacing of five millimeters (5mm) can support the pointer of a millimeter (lmm).In addition, for large-scale touch panel. spacing can be made to be greater than five millimeters (5mm) (such as, supporting finger).Therefore, when supporting pointer and/or when support larger panel, required touch control circuit and power also can not be subject to appreciable impact.
Fig. 2 to 5 shows and touches (PCT) panel 100 according to the exemplary mutual capacitance formula projected capacitive of disclosure exemplary embodiment.Capacitive touch panel 100 can be used to and electronics interface, described electronic installation comprises but must not be limited to: large-scale touch panel product, Integral computer, mobile computing device (such as hand-portable computers, personal digital assistant (PDA), laptop computer, online computer, flat computer, etc.), portable telephone device (such as, cell phone and smart mobile phone), portable type game device, attachment device for displaying audio, multimedia device, Satellite Navigation Set (such as, GPS (GPS) guider), electronic reading device (eReader), intelligent television (TV) device, surface computing device (such as, desktop computer), personal computer (PC) device, described capacitive touch panel 100 can also be used for being connected with other device adopted based on the man-machine interface touched.
Capacitive touch panel 100 can comprise ITO touch panel, and described ITO touch panel comprises and being configured to (such as, along parallel orbit, substantial parallel track, etc.), and mutually adjacent drive electrode 102(such as intersects that ITO drives trace/track).In certain embodiments, can use high lead village property and optically transparent level and/or vertically ridge/grid 104 to form drive electrode 102.Grid 104 can reduce the impedance of row traces and/or row trace, thus the phase shift of leap panel is reduced, and reduce the complicacy of touch control circuit.Drive electrode 102 is leptosomatic (such as, along the longitudinal Axis Extension).Such as, each drive electrode 102 can along the Axis Extension on stayed surface (such as the substrate of capacitive touch panel 100).Drive electrode 102 has spacing 106(such as, basic interval of repeating between the axis of adjacent driven electrode 102).
In certain embodiments, drive electrode 102 also has significant interval 108, and described significant interval 108 comprises the minor increment between the edge of adjacent driven electrode 102.
Capacitive touch panel 100 also comprises and such as intersects the sensing electrode 110 of ITO sensing trace/track, and described sensing electrode 110 is configured to (such as, along parallel orbit, substantial parallel track, etc.), and to cross over drive electrode 102 mutually adjacent.In certain embodiments, high conductivity and optically transparent level and/or vertical ridge/grid 104 can be used to form sensing electrode 110(such as, as mentioned above).Sensing electrode 110 is leptosomatic (such as, along the longitudinal Axis Extension).Such as, each sensing electrode 110 can along the Axis Extension on stayed surface (such as the substrate of capacitive touch panel 100).Sensing electrode 110 has spacing 112(such as, the interval in basic heavy summer between the axis of neighboring sensor electrode 110).
In certain embodiments, spacing 112 is based on the touch diameter of finger.Such as, the spacing 112 between neighboring sensor electrode 110 can be from center to center ground about five millimeters (5mm).But the spacing 112 of five millimeters (5mm) is only provided in an illustrative manner, not mean that this will be construed as limiting the disclosure.Therefore, other embodiment can have the spacing 112 being greater than or less than five millimeters (5mm).In certain embodiments, sensing electrode 110 also has significant interval 114, and described significant interval 114 comprises the minor increment between the edge of neighboring sensor electrode 110.In some instances, significant interval 114 on the direction perpendicular to sensing electrode 110, between the neighboring edge of sensing electrode 110 measured (such as, as shown in Figure 2), in other embodiments simultaneously, significant interval 114 between the neighboring edge of sensing electrode 110, relative to sensing electrode 110 with an angle measured (such as, as shown Fig. 4 A).
Drive electrode 102 and sensing electrode 110 define coordinate system, and wherein each coordinate position (pixel) comprises the capacitor at each point of crossing place be formed between one of one of multiple drive electrode 102 and multiple sensing electrode 110.Therefore, drive electrode 102 is configured to be connected to current source, to produce partial electrostatic field at each capacitor place, wherein, at each capacitor place by point and/or the electric capacity caused corresponding coordinate position is relevant with touch reduces by the change of partial electrostatic field that pointer produces.By this way, more than one touch can by simultaneously, (or the while of at least substantially) senses at multiple different coordinate position place.In certain embodiments, described multiple drive electrode 102 can be driven in parallel by current source, and such as a different set of signal is provided to multiple drive electrode 102.In other embodiments, such as, multiple drive electrode 102 in series can be driven by current source, wherein once only drives the subset (subset) of a drive electrode 102 or electrode 102.
Sensing electrode 110 and/or drive electrode 102 comprise the wing portion/projection 116 in a series of one or more interval projected between adjacent electrode.In certain embodiments, the grid 104 of sensing electrode 110 and/or drive electrode 102 can as the ridge being used for projection 116.Projection 116 is tapered away from sensing electrode 110 and/or drive electrode 102.Such as, projection 116 can be repetition with leg-of-mutton (such as, as Fig. 2,3, the serrate shown in 4A, 4D, 4E, 5A and 5B).In addition, projection 116 can extend beyond the center line 118(of restriction between neighboring sensor electrode 110 and/or adjacent driven electrode 102 such as, and as Fig. 4 A, 4B, with shown in 4E, wherein projection 116 is staggered layout).
Projection 116 is configured in the x-direction and the z-direction with the capacitive touch panel 100 of broader and more linear touch profile (such as, providing the signal being suitable for interpolation).Such as, with reference to figure 2, the capacitive touch panel 100 with the projection 116 forming saw tooth pattern is moved past along with having the instrument touching profile 120, the response of electrode by more linear in the multiple intervals moved into along with instrument between multiple sensing electrode 110/weaken slower (such as, when compared with the arrangement of the row grid shown in Fig. 1).Such as, when pointer moves past trace in the X direction can with adjacent column trace even variation be coupled, and the touch coordinate calculated changes more equably, has minimum dead band simultaneously.This can improve Signal reception, can maintain the noise threshold 124 higher than touch panel, thus form the constant signal between multiple coordinate position with the point of crossing 122 between making from multiple signals of neighboring sensor electrode 110.Therefore, use, even if multiple electrodes of touch panel comprise the spacing (such as, described above) based on finger touch diameter together with the pointer that the capacitive touch panel 100 configured according to the disclosure can be less than finger touch diameter substantially with touch diameter.
Projection 116 can be configured to sensing electrode 110 and/or drive electrode 102 provides the periphery increased to some extent for the surf zone occupied by electrode.This arrangement can supply out the edge length of increase for electrode, this can weaken the mutual capacitance between sensing electrode 110 and drive electrode 102, and strengthens the edge capacitance of sensing electrode 110 and the mutual capacitance between sensing electrode 110 and the instrument such as pointed.In certain embodiments, projection 116 can be meander configuration.With reference to figure 4B, projection 116 can occupy leg-of-mutton region substantially, and described region has a large amount of basic/main projection 126, and the projection 128 of one or more similar finger (narrow rectangle) is stretched out from each main projection 126.This arrangement can along with instrument move away from an electrode and shift to another electrode time, in such as finger contours, provide more linear change.
What should be noted is, although the axis of the interval self-sensing electrode 110 that Fig. 4 B shows between multiple projections 128 of similar finger rises and increases gradually, but the interval between multiple projections 128 of similar finger also the axis of self-sensing electrode 110 can be risen and reduce gradually, also can relative constancy, or can with alternately, random or semirandom pattern increases and reduces.In addition, should be noted, multiple projections 128 of similar finger itself can have projection (such as, showing self-similarity).
With reference to figure 4C, multiple projections 116 can occupy the region of general rectangular, define rectangle gap (such as, with the form of " double grid ") in this region.This arrangement can be used for for the fuzzy sharp-pointed finger contours of pointer, and the coverage of profile is slightly extended.Should be noted, drive electrode 102 and sensing electrode 110 can have difform projection respectively.Such as, sawtooth pattern projection can for drive electrode 102, and the projection of similar finger can for sensing electrode 110.In addition, the different rows of one class/one deck electrode can have different projections.Such as, wherein a line sensing electrode 110 can have the projection of similar finger, and the sensing electrode 110 of adjacent lines can have sawtooth pattern projection, etc.In certain embodiments, the dynamic reduction noise threshold for image zero-bit adjustment (image zeroing) also can use (such as, for pointer extends finger contours, etc.).
In certain embodiments, the significant interval 114 of multiple sensing electrode 110 is greater than the significant interval 108 of drive electrode 102 at least substantially.Such as, may be desirably, make the distance maintaining between multiple sensing electrode 110 larger than the interval between multiple drive electrode 102, to weaken the electric capacity of row to row, and provide the enough edge capacitances from the edge/sidepiece of sensing electrode 110 to drive electrode 102.In addition, may be desirably, make the distance maintaining between multiple drive electrode 102 less than the interval between multiple sensing electrode 110, the noise of other circuit generation is not subject to (such as to shield sensing electrode 110, from the noise that liquid crystal display (LCD) is below shielded, etc.) impact.In certain embodiments, the significant interval 114 of sensing electrode 110 in the about twice of the significant interval 108 of drive electrode 102 between five times (25x).But this interval only provides in an illustrative manner, and be not intended to be construed as limiting the disclosure.Therefore, the significant interval 114 of sensing electrode 110 can be less than the twice (2x) of the significant interval 108 of drive electrode 102 (such as, 15 times (1.5x)) and/or be greater than five times (5x) (such as, ten times (10x)) of significant interval 108 of drive electrode 102.
Sensing electrode 110 and drive electrode 102 electrical isolation (such as, use dielectric layer, etc.).Such as, sensing electrode 110 can be set up on a substrate (such as, comprising the sensing layer 130 be arranged on the glass substrate), and drive electrode 102 can be set up on a separate substrate (such as, comprising the driving layer 132 being disposed in another substrate).In this two-layer arrangement, sensing layer 130 can be disposed in and drive on layer 132 (such as, relative to touch-surface).Such as, sensing layer 130 can be located than driving layer 132 closer to touch-surface.But this arrangement is only provided in an illustrative manner, and be not intended to be construed as limiting the disclosure.Therefore, other arrangement can be provided, wherein, drive layer 132 to locate than sensing layer 130 closer to touch-surface, and/or sensing layer 130 and drive layer 132 to be included in same layer.Such as, in the embodiment of 1.5 layers (such as, drive layer 132 and sensing layer 130 to be included on the same layer, but each other by physical separation), one or more bonding line 134 can be used to multiple parts of drive electrode 102 to link together (such as, as shown in Figure 5A and 5B).Similarly, bonding line can be used to multiple parts of sensing electrode 110 to link together.
One or more capacitive touch panel 100 can be included in touch panel unit 138.Touch panel unit 138 can comprise the display screen of such as LCD screen 140, and wherein sensing layer 130 and driving layer 132 are between LCD screen 140 and binding layer 142, and such as protective cover 144(is such as, glass) be attached on binding layer 142.Protective cover 144 can comprise protective coating, anti-reflection coating, etc.Protective cover 144 can comprise touch-surface 146, and operator can use one or more finger, pointer etc. that order is inputed to touch panel unit 138 above.Described order can be used to manipulate the image shown by such as LCD screen 140.In addition, order the electronic installation that can be used as to being connected to capacitive touch panel 100, the input of such as multimedia device or another electronic installation (such as, described above).
Than that described above, also it should be noted that spoken of in this manual " embodiment ", " another embodiment ", " embodiment " etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also fall within the scope of the invention to realize this feature, structure or feature in conjunction with other embodiments.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (7)
1. a projecting type capacitor touch panel, it is characterized in that: described touch panel comprises: multiple slender type drive electrode, it is configured to mutually adjacent, and the significant interval between the adjacent elongate drive electrode being included in described multiple slender type drive electrode; Multiple slender type sensing electrode, it is mutually adjacent that it is configured to cross over described multiple slender type drive electrode, and the significant interval between the adjacent elongate sensing electrode being included in described multiple slender type sensing electrode, significant interval between described multiple slender type sensing electrode is greater than the significant interval between multiple slender type drive electrode at least substantially, and described multiple slender type sensing electrode comprises the multiple projections in the interval between the adjacent elongate sensing electrode projecting into described multiple slender type sensing electrode.
2. projecting type capacitor touch panel according to claim 1, is characterized in that: described multiple slender type sensing electrode comprises the spacing of at least five millimeters.
3. projecting type capacitor touch panel according to claim 1, is characterized in that: each of described multiple projection is tapered away from described multiple slender type sensing electrode.
4. projecting type capacitor touch panel according to claim 1, is characterized in that: described multiple projection extends beyond the center line limited between the adjacent elongate sensing electrode of described multiple slender type sensing electrode.
5. projecting type capacitor touch panel according to claim 1, is characterized in that: described multiple slender type drive electrode comprises multiple second projections in the interval between the adjacent elongate drive electrode projecting into described multiple slender type drive electrode.
6. projecting type capacitor touch panel according to claim 5, is characterized in that: each of described multiple second projection is tapered away from described multiple slender type drive electrode.
7. projecting type capacitor touch panel according to claim 5, is characterized in that: described multiple second projection extends beyond the center line limited between the adjacent elongate drive electrode of described multiple slender type drive electrode.
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| CN201410633714.6A CN104375726A (en) | 2014-11-12 | 2014-11-12 | Capacitive projected capacitive touch panel |
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| CN201410633714.6A CN104375726A (en) | 2014-11-12 | 2014-11-12 | Capacitive projected capacitive touch panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107368213A (en) * | 2016-05-12 | 2017-11-21 | 敦泰电子有限公司 | Touch-control structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101655754A (en) * | 2008-08-21 | 2010-02-24 | 株式会社和冠 | Meshed touchscreen pattern |
| US20130207923A1 (en) * | 2012-02-09 | 2013-08-15 | Maxim Integrated Products, Inc. | Capacitive touch panel having protrusions formed between drive and/or sensor electrodes |
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2014
- 2014-11-12 CN CN201410633714.6A patent/CN104375726A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101655754A (en) * | 2008-08-21 | 2010-02-24 | 株式会社和冠 | Meshed touchscreen pattern |
| US20130207923A1 (en) * | 2012-02-09 | 2013-08-15 | Maxim Integrated Products, Inc. | Capacitive touch panel having protrusions formed between drive and/or sensor electrodes |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107368213A (en) * | 2016-05-12 | 2017-11-21 | 敦泰电子有限公司 | Touch-control structure |
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Application publication date: 20150225 |