CN101968701B - Touch input device - Google Patents
Touch input device Download PDFInfo
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- CN101968701B CN101968701B CN2009101608687A CN200910160868A CN101968701B CN 101968701 B CN101968701 B CN 101968701B CN 2009101608687 A CN2009101608687 A CN 2009101608687A CN 200910160868 A CN200910160868 A CN 200910160868A CN 101968701 B CN101968701 B CN 101968701B
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Abstract
The invention discloses a touch input device, comprising a touch panel, a selection module and a detection module. The touch panel comprises a plurality of capacitance nodes which are formed and distributed on the touch panel; the selection module is electrically connected with the plurality of capacitance nodes of the touch panel and used for selecting at least one capacitance node from the plurality of capacitance nodes to form a first capacity node set and a second capacitance node set adjacent to the first capacity node set; and the detection module is electrically connected with the selection module and comprises a signal generator for generating detection pulse signals and inverted pulse signals with phases opposite to that of the detection pulse signals, wherein the detection pulse signals are input to the first capacitance node set through the selection module and the inverted pulse signals are input to the second capacitance node set through the selection module.
Description
Technical field
The present invention relates to a kind of touch-control input device and touch control sensing circuit, and be specifically related to a kind of capable of suppressing electromagnetic interference touch-control input device and touch control sensing circuit.
Background technology
Because science and technology is showing improvement or progress day by day more and more diversification and hommizations of product such as drive information, communication, electronics.For example, through products such as contact panel, handwriting pads, the user can save the trouble of input medias such as in the past using mouse or keyboard directly with finger or pointer running program or input information on panel.
The technology of existing contact panel is broadly divided into several kinds of resistance-type, condenser type, optical profile type and ultrasonic formulas.It mainly forms electric resistance touch-control panel and comprises up and down two-layer indium tin oxide-coated glass (ITO glass).When object touches that the upper strata electro-conductive glass makes its depression and when the lower floor electro-conductive glass contacts, the controller of this panel will detect a voltage signal, and judge the coordinate position of contact point in view of the above.
Capacitance type touch-control panel is divided into surface capacitance type contact panel and projective capacitive touch panel again.The structure of surface capacitance type contact panel is formed and is comprised an electro-conductive glass, all be coated with conductive material on the electro-conductive glass two sides, and the outside of electro-conductive glass can be covered with again, and one deck is scratch resistant films.Electrode around the glass plate can form uniform electric field at glass surface.Whenever the user uses the finger touch panel, its finger will with the capacitive coupling on the conductive layer of the outside, inhale and remove electric current small on the panel.The magnitude of current that flows out from the electrode that is positioned at each corner of contact panel is directly proportional with the distance of pointing the corner, and the controller of contact panel is through the positional information that calculates contact point to this current ratio.
And recently, projective capacitive touch panel is widely used in various touch-control electronic devices (like intelligent mobile phone) especially.The positioning principle of projective capacitive touch panel is to utilize the capacitance variations that is embedded in the induction grid in the contact panel to judge the position of contact point.See also Figure 1A, Figure 1A shows the synoptic diagram of contact panel 10 of the prior art.Shown in Figure 1A, contact panel 10 is embedded with many directions X leads with layered mode and (comprises X1～Xm) and many Y direction leads and (comprise Y1～Yn).Directions X lead and Y direction lead are staggered and form the induction grid jointly; Promptly form a capacitive node (for example capacitive node 100a, 100b, 100c among Figure 1A) in the point of crossing of each directions X lead and Y direction lead; For example in this example, have m*n capacitive node.In the time of the finger touch screen, finger will change the capacitance of contiguous capacitive node on the induction grid to the coupled relation of induction grid.Testing circuit can utilize the capacitance change of the capacitive node on the induction grid to calculate the coordinate position of contact point.
Please consult Figure 1B in the lump, Figure 1B shows the synoptic diagram of touch-control input device 1 in the prior art.Shown in Figure 1B, touch-control input device 1 of the prior art has comprised the touch control sensing circuit that cooperates contact panel 10 to use.Touch control sensing circuit inside can comprise multitask selector switch 12, control circuit 120, detection module 14.In the side circuit, detection module 14 can be capacitance measurement circuit.
In the practical application; Control circuit 120 may command multitask selector switchs 12; And select specific directions X lead (X1～Xm) and Y direction lead (Y1～Yn) through multitask selector switch 12; With selected specific capacitive node, for example multitask selector switch 12 can select directions X lead X3 and Y direction lead Y3 to correspond to capacitive node 100a.Detection module 14 can produce and detect pulse signal Sdet, and will detect pulse signal Sdet and input to capacitive node 100a through multitask selector switch 12.Subsequently, detection module 14 can be according to the signal feedback of the detection pulse signal Sdet that inputs to capacitive node 100a and then the touch control detection state of judgement capacitive node 100a.
The detection pulse signal Sdet here is generally voltage signal or the current signal with high-frequency recurrent pulses.When detection module 14 is imported specific capacitive node (like capacitive node 100a) with these high-frequency detection pulse signals; To cause the phenomenon of electromagnetic interference (EMI) to the other electron component of contiguous contact panel 10 in the electronic system (for example LCD Panel etc.); Also maybe (for example capacitive node 100b 100c) causes electromagnetic interference (EMI) to contiguous capacitive node.
Under the requirement that the contact panel degree of accuracy progressively improves now, the error the when deviser suddenly desires to dwindle the touching signals judgement.On the other hand, the volume of various consumer electronic devices driving under the gesture of slimming more and more, eliminate or avoid that electromagnetic interference (EMI) also becomes very important problem between the different electric sub-element.
The present invention proposes a kind of touch-control input device, and the electronic system that it can suppress electromagnetic interference (EMI) and import adaptable across various touch-controls is to address the above problem.
Summary of the invention
One object of the present invention is to provide a kind of touch-control input device, and it comprises contact panel, selects module (multiplexer module) and detection module.
According to an embodiment, contact panel comprises a plurality of capacitive nodes and forms and be distributed on this contact panel.Select these a plurality of capacitive nodes of module and contact panel to electrically connect, select module from these a plurality of capacitive nodes, to choose set of first capacitive node and the set of second capacitive node.First, second capacitive node set here comprises at least one capacitive node respectively, and contiguous first capacitive node set of second capacitive node set.
Detection module electrically connects with selecting module; Detection module comprises signal generator and detects pulse signal in order to produce; Detect pulse signal and be input to the set of first capacitive node through selecting module; Detection module is judged the touch control detection state of first capacitive node set according to the detection pulse signal that is input to the set of first capacitive node; And signal generator produces and detects the opposite rp pulse signal of pulse signal phase place in the lump, and the rp pulse signal is input to the set of second capacitive node through selecting module.
According to touch-control input device of the present invention, wherein this contact panel is a projection type capacitance touch control panel.
In a kind of embodiment of this touch-control input device; Wherein this contact panel comprises many directions X leads and many Y direction leads; These many directions X leads and this many Y direction leads are arranged each other and are latticed, and each these a plurality of capacitive node is corresponding to directions X lead wherein and a Y direction lead and forming wherein.
Preferably, this selection module comprises:
The first multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this first multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selects module to select wherein a directions X lead and select wherein Y direction lead from these many Y direction leads from these many directions X leads through this first multitask selector switch, chooses one of them capacitive node from this a plurality of capacitive nodes of this contact panel thus and gathers to form this first capacitive node; And
The second multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this second multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selects module to select wherein a directions X lead and select wherein Y direction lead from these many Y direction leads from these many directions X leads through this second multitask selector switch, chooses one of them capacitive node from this a plurality of capacitive nodes of this contact panel thus and gathers to form this second capacitive node.
Preferably, this selection module comprises:
The first multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this first multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module is selected at least one directions X lead and is selected at least one Y direction lead from these many Y direction leads from these many directions X leads through this first multitask selector switch, from these a plurality of capacitive nodes of this contact panel, chooses at least one capacitive node thus to form this first capacitive node set; And
The second multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this second multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module is selected at least one directions X lead and is selected at least one Y direction lead from these many Y direction leads from these many directions X leads through this second multitask selector switch, from these a plurality of capacitive nodes of this contact panel, chooses at least one capacitive node thus to form this second capacitive node set.
Preferably, this selection module comprises:
The first multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this first multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module through this first multitask selector switch from these many directions X leads select the first directions X lead and should many Y direction lead ground connection or sky connect, gather to choose all capacitive nodes that should the first directions X lead and to form this first capacitive node thus; And
The second multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this second multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module through this second multitask selector switch from these many directions X leads select the second directions X lead and should many Y direction lead ground connection or sky connect, gather to choose all capacitive nodes that should the second directions X lead and to form this second capacitive node thus.
Preferably, this selection module comprises:
The first multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this first multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module should many directions X lead ground connection through this first multitask selector switch or sky connects and select a Y direction lead from these many Y direction leads, thus to choose all capacitive nodes that should a Y direction lead and to form this first capacitive node set; And
The second multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this second multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module should many directions X lead ground connection through this second multitask selector switch or sky connects and select the 2nd Y direction lead from these many Y direction leads, thus to choose all capacitive nodes that should the 2nd Y direction lead and to form this second capacitive node set.
In a kind of embodiment of this touch-control input device; Wherein this detection module is according to the signal feedback of this detection pulse signal that is input to this first capacitive node set; And then judge this touch control detection state of this first capacitive node set, wherein this signal feedback is to capacitance variation that should the set of first capacitive node.
Another object of the present invention is to provide a kind of touch-control input device, it comprises contact panel, selects module, first detection module and second detection module.
According to an embodiment, contact panel comprises a plurality of capacitive nodes, forms and is distributed on this contact panel.Select these a plurality of capacitive nodes of module and contact panel to electrically connect, select module from these a plurality of capacitive nodes, to choose set of first capacitive node and the set of second capacitive node.First, second capacitive node set here comprises at least one capacitive node respectively, and contiguous first capacitive node set of second capacitive node set.
First detection module electrically connects with selecting module; Detection module comprises first signal generator and detects pulse signal in order to produce first; First detects pulse signal is input to the set of first capacitive node through selecting module, and the first detection module basis is input to first of first capacitive node set and detects the first touch control detection state that pulse signal is judged the set of first capacitive node.Second detection module electrically connects with selecting module; Second detection module comprises secondary signal generator for generating second and detects pulse signal; Wherein the second detection pulse signal is opposite with the first detection pulse signal phase place; Second detects pulse signal is input to the set of second capacitive node through selecting module, and second detection module basis is input to second of second capacitive node set and detects the second touch control detection state that pulse signal is judged the set of second capacitive node.
In a kind of embodiment of this touch-control input device, wherein this contact panel is the projection type capacitance touch control panel.
In a kind of embodiment of this touch-control input device; Wherein this contact panel comprises many directions X leads and many Y direction leads; These many directions X leads and this many Y direction leads are arranged each other and are latticed, and each these a plurality of capacitive node is corresponding to directions X lead wherein and a Y direction lead and forming wherein.
Preferably, this selection module comprises:
The first multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this first multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selects module to select wherein a directions X lead and select wherein Y direction lead from these many Y direction leads from these many directions X leads through this first multitask selector switch, chooses one of them capacitive node from this a plurality of capacitive nodes of this contact panel thus and gathers to form this first capacitive node; And
The second multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this second multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selects module to select wherein a directions X lead and select wherein Y direction lead from these many Y direction leads from these many directions X leads through this second multitask selector switch, chooses one of them capacitive node from this a plurality of capacitive nodes of this contact panel thus and gathers to form this second capacitive node.
Preferably, this selection module comprises:
The first multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this first multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module is selected at least one directions X lead and is selected at least one Y direction lead from these many Y direction leads from these many directions X leads through this first multitask selector switch, from these a plurality of capacitive nodes of this contact panel, chooses at least one capacitive node thus to form this first capacitive node set; And
The second multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this second multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module is selected at least one directions X lead and is selected at least one Y direction lead from these many Y direction leads from these many directions X leads through this second multitask selector switch, from these a plurality of capacitive nodes of this contact panel, chooses at least one capacitive node thus to form this second capacitive node set.
Preferably, this selection module comprises:
The first multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this first multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module through this first multitask selector switch from these many directions X leads select the first directions X lead and should many Y direction lead ground connection or sky connect, gather to choose all capacitive nodes that should the first directions X lead and to form this first capacitive node thus; And
The second multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this second multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module through this second multitask selector switch from these many directions X leads select the second directions X lead and should many Y direction lead ground connection or sky connect, gather to choose all capacitive nodes that should the second directions X lead and to form this second capacitive node thus.
Preferably, this selection module comprises:
The first multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this first multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module should many directions X lead ground connection through this first multitask selector switch or sky connects and select a Y direction lead from these many Y direction leads, thus to choose all capacitive nodes that should a Y direction lead and to form this first capacitive node set; And
The second multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this second multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module should many directions X lead ground connection through this second multitask selector switch or sky connects and select the 2nd Y direction lead from these many Y direction leads, thus to choose all capacitive nodes that should the 2nd Y direction lead and to form this second capacitive node set.
In a kind of embodiment of this touch-control input device; Wherein this first detection module is according to the signal feedback of this first detection pulse signal that is input to this first capacitive node set; And then judge this first touch control detection state of this first capacitive node set, wherein this signal feedback is to capacitance variation that should the set of first capacitive node.
In a kind of embodiment of this touch-control input device; Wherein this second detection module is according to the signal feedback of this second detection pulse signal that is input to this second capacitive node set; And then judge this second touch control detection state of this second capacitive node set, wherein this signal feedback is to capacitance variation that should the set of second capacitive node.
Can further be understood through following detailed Description Of The Invention and accompanying drawing about advantage of the present invention and spirit.
Description of drawings
Figure 1A shows the synoptic diagram of a kind of contact panel in the prior art.
Figure 1B shows the synoptic diagram of a kind of touch-control input device in the prior art.
Fig. 2 shows touch-control input device in the prior art and different capacitive nodes is produced the sequential synoptic diagram that detects pulse signals.
Fig. 3 shows the synoptic diagram according to the touch-control input device in first specific embodiment of the present invention.
Fig. 4 A shows the example schematic of choosing of set of first capacitive node and the set of second capacitive node.
Fig. 4 B shows the example schematic of choosing of set of first capacitive node and the set of second capacitive node.
Fig. 4 C shows the example schematic of choosing of set of first capacitive node and the set of second capacitive node.
Fig. 5 shows touch-control input device in first specific embodiment and in regular turn different electric capacity node set is produced the sequential synoptic diagram that detects pulse signals and rp pulse signal.
Fig. 6 shows the synoptic diagram according to the touch-control input device in second specific embodiment of the present invention.
Fig. 7 shows touch-control input device in second specific embodiment and in regular turn different electric capacity node set is produced first and detect the sequential synoptic diagram that pulse signals and second detect pulse signal.
Embodiment
See also Fig. 3.Fig. 3 shows the synoptic diagram according to the touch-control input device 3 in first specific embodiment of the present invention.Touch-control input device 3 comprises contact panel 30, selects module 32 and detection module 34.
In this embodiment; Contact panel 30 comprises many directions X leads (X1～Xm) and many Y direction leads (Y1～Yn); Directions X lead and Y direction lead are arranged each other and are latticed; Like X, Y direction lead among Fig. 3 is that level, vertical interlaced are arranged and formed well word shape grid, but the present invention is as limit, and it is also applicable to the arrangements of conductors mode of other direction or angle.And form a capacitive node (in 300) like Fig. 3 in the staggered part of each directions X lead and Y direction lead.That is to say that contact panel comprises a plurality of capacitive nodes, respectively correspondence wherein directions X lead form and be distributed in this contact panel 30 with Y direction lead wherein.In practical application, contact panel can be the capacitance touching control panel of projection type capacitance touch control panel or other tool similarity.
As shown in Figure 3, select module 32 and this capacitive node of contact panel 30 to electrically connect.Detection module 34 electrically connects with selecting module 32.
In this embodiment, select module 32 further to comprise the first multitask selector switch 322, the second multitask selector switch 324 and control circuit 320 in order to control above-mentioned multitask selector switch.The first multitask selector switch 322 and the second multitask selector switch 324 are connected between contact panel 30 and the detection module 34.The first multitask selector switch 322 and the second multitask selector switch 324 respectively with the directions X lead of contact panel 30 (X1～Xm) and Y direction lead (Y1～Yn) electrically connect.
Select the module 32 control circuits 320 control first multitask selector switchs 322 capable of using and the second multitask selector switch 324 from contact panel 30, to choose set of first capacitive node and the set of second capacitive node respectively all capacitive node.First, second capacitive node set here comprises at least one capacitive node respectively, and the second multitask selector switch, 324 selected second capacitive nodes set in the present invention are designed to selected first capacitive nodes set of the contiguous first multitask selector switch 322.
What need special instruction is that here set of first capacitive node and the set of second capacitive node can comprise at least one capacitive node.In practical application, the capacitive node set is a plurality of capacitive nodes of capacitive node, a full line or a permutation of a capacitive node, a plurality of vicinities.
That below mainly enumerates three kinds of capacitive node set chooses instance as brief description.
See also Fig. 4 A, Fig. 4 B and Fig. 4 C.Fig. 4 A to Fig. 4 C shows first capacitive node set N1 and second capacitive node set N2 three kinds respectively and chooses example schematic.
Shown in Fig. 4 A, selected first capacitive node set N1 of the first multitask selector switch can comprise single capacitive node 300a, and selected second capacitive node set N2 of the second multitask selector switch can comprise single capacitive node 300b.The first multitask selector switch is selected wherein a directions X lead (like the X3 Fig. 4 A) and is selected a wherein Y direction lead (like the Y3 Fig. 4 A) from these many Y direction leads from these many directions X leads, chooses capacitive node 300a thus to form first capacitive node set N1.On the other hand; The second multitask selector switch is selected wherein a directions X lead (like the X3 Fig. 4 A) and is selected a wherein Y direction lead (like the Y2 Fig. 4 A) from these many Y direction leads from these many directions X leads, chooses capacitive node 300b thus to form second capacitive node set N2.
Shown in Fig. 4 B, selected first capacitive node set N1 of the first multitask selector switch can comprise a plurality of capacitive node 300a ', and selected second capacitive node set N2 of the second multitask selector switch also can comprise a plurality of capacitive node 300b '.The first multitask selector switch selects at least one directions X lead (like the X1 Fig. 4 B～X3) and from these many Y direction leads select at least one Y direction lead (like the Y3 Fig. 4 B), to choose at least one capacitive node 300a ' thus to form first capacitive node set N1 from these many directions X leads.The second multitask selector switch selects at least one directions X lead (like the X1 Fig. 4 B～X3) and from these many Y direction leads select at least one Y direction lead (like the Y2 Fig. 4 B), to choose at least one capacitive node 300b ' thus to form second capacitive node set N2 from these many directions X leads.
Shown in Fig. 4 C; Selected first capacitive node set N1 of the first multitask selector switch can comprise the capacitive node of a full line or a permutation, and selected second capacitive node set N2 of the second multitask selector switch also can comprise the capacitive node of a full line or a permutation.Like choosing in the instance of Fig. 4 C; The first multitask selector switch select wherein a directions X lead X3 and should many Y direction lead (ground connection of Y1～Yn) or sky connect, thus with all capacitive nodes of choosing corresponding directions X lead X3 and form first capacitive node and gather N1.In this simultaneously; The second multitask selector switch; Be connected between this contact panel and this detection module; Many directions X leads of this of this second multitask selector switch and this contact panel and this many Y direction leads electrically connect; This selection module through this second multitask selector switch from these many directions X leads select one second directions X lead X2 and should many Y direction lead (ground connection of Y1～Yn) or sky connect, and gather N2 to choose all capacitive nodes that should the second directions X lead X2 and to form this second capacitive node thus.
Choose instance above comprehensive, choose the adjacent node on one or more lead that the practice that capacitive node forms capacitive node comprised level or vertical direction at least among the present invention.That is to say that choosing of capacitive node set can be that single-point, horizontal direction extend, vertical direction is extended or the various modes of choosing such as block type among the present invention.
The following passage further specifies with the instance of choosing of Fig. 4 A, and please consults Fig. 3 and Fig. 4 A simultaneously.As shown in Figure 3; Detection module 34 comprises signal generator 340 and detects pulse signal Sdet in order to produce; Detect pulse signal Sdet and can be input to first capacitive node set N1 (please with reference to Fig. 4 A) through the first multitask selector switch 322 of selecting module 32, detection module 34 is judged the touch control detection state of first capacitive node set N1 according to the detection pulse signal Sdet that is input to this first capacitive node set N1.
For example when the user contacts the position of capacitive node 300a on the contact panel 30 (being first capacitive node set N1 in this example), will cause capacitive node 300a that capacitance variation takes place.At this moment, to should capacitance variation, detection module 34 can be according to the signal feedback (signalfeedback) of the detection pulse signal Sdet that is input to first capacitive node set N1, and then learns the touch control detection state of first capacitive node set N1.
What need pay special attention to is; In the present invention when the signal generator 340 of detection module 34 produces detection pulse signal Sdet to the first capacitive node set N1; Also produce in the lump and the opposite rp pulse signal Sinv of detection pulse signal Sdet phase place; In this embodiment as shown in Figure 3, rp pulse signal Sinv can produce through simple negative circuit based on detecting pulse signal Sdet, but the present invention is not as limit.In another embodiment, also can independently be provided with two groups synchronously but the signal generator of anti-phase output produces respectively or produce with the method for other signal inversion, this is known by the technician, does not give unnecessary details in addition at this.The rp pulse signal Sinv here is input to second capacitive node set N2 of contiguous first capacitive node set N1 through selecting module 32.
Please consult Fig. 5 in the lump, Fig. 5 shows touch-control input device 3 and in regular turn different electric capacity node set is produced the sequential synoptic diagram that detects pulse signal Sdet and rp pulse signal Sinv.Can know that by Fig. 5 in a specific sense cycle (like the time point t0 among Fig. 5 to time point t1), detection module 34 produces simultaneously and detects pulse signal Sdet and rp pulse signal Sinv and input in two groups of contiguous capacitive nodes set.Thus; Detecting pulse signal Sdet can be in order to the touch control detection state of sense capacitance node; And simultaneously; Can also help to suppress to detect the electromagnetism Interference of pulse signal Sdet in order to suppress the detecting electromagnetic interference of pulse signal Sdet with the rp pulse signal Sinv of its anti-phase to other electronic components to other capacitive nodes.
In sum; Touch-control input device 3 is through producing and the rp pulse signal Sinv that detects pulse signal Sdet anti-phase; And input near the capacitive node set of desire detection, detect the electromagnetic interference effect that pulse signal Sdet produces to reduce, but the present invention is not as limit.
See also Fig. 6.Fig. 6 shows the synoptic diagram according to the touch-control input device 5 in second specific embodiment of the present invention.Be that with the maximum difference of first specific embodiment touch-control input device 5 comprises two groups of detection modules altogether, like the first detection module among the figure five 54 and second detection module 56.
In this embodiment, the signal generator (540,560) that comprises respectively separately of the first detection module 54 and second detection module 56 detects pulse signal Sdet+ and second and detects pulse signal Sdet-to produce first.First detects pulse signal Sdet+ can be input to the set of first capacitive node through selecting module 52, in order to judge the touch control detection state of first capacitive node set.Second detects pulse signal Sdet-can gather through second capacitive node of selecting module 52 to be input to contiguous first capacitive node set, in order to judge the touch control detection state of second capacitive node set.
What need special instruction is; It is inverting each other that the first detection pulse signal Sdet+ and second detects pulse signal Sdet-; That is to say that first detects pulse signal Sdet+ and second detects pulse signal Sdet-inhibition electromagnetic interference (EMI) each other mutually, improves the stability of system.And on the other hand; The first detection module 54 and second detection module 56 can detect pulse signal Sdet+ and second according to first simultaneously and detect the touch control detection state that pulse signal Sdet-judges two capacitive node set respectively, can the judgement speed of touch control detection be improved twice at least in theory.See also Fig. 7.Fig. 7 shows touch-control input device 5 and in regular turn different electric capacity node set is produced the sequential synoptic diagram that the first detection pulse signal Sdet+ and second detects pulse signal Sdet-.
For instance; The pairing detection of Fig. 7 can be first detection module 54 and detects pulse signal Sdet+ by directions X lead X3 input first; And all Y direction leads (ground connection of Y1～Yn) or sky connect; Whether form first capacitive node set N1 with all capacitive nodes of choosing corresponding X3, promptly detecting has touch-control to occur in (on the X3, Y1～Yn).Second detection module 56 detects pulse signal Sdet-by directions X lead X4 input second; And with all Y direction leads (ground connection of Y1～Yn) or sky connect; Whether form second capacitive node set N2 with all capacitive nodes of choosing corresponding X4, promptly detecting has touch-control to occur in (on the X4, Y1～Yn).
In sum, in touch-control input device 5 of the present invention, the relative position relation of the capacitive node of the selected first capacitive node group and its composition of this second capacitive node set is not restricted to horizontal or vertical neighbouring relations.For example in another embodiment; The adjoining capacitive node of can comprise in each capacitive node group that level is adjacent, annular, square, oblique line or other geometric figure being arranged forms; The composition number of its capacitive node is not defined as single yet; Also can be two or more majorities capacitive node, all can reach similar or detect the effect of judging faster.The start (operation) of touch-control input device 5 other inner members and principle and first specific embodiment are roughly the same in second specific embodiment, do not give unnecessary details in addition at this.
Than prior art; The present invention is with one group of synchronized with each other but reverse pulse signal input adjacent capacitor node or adjacent capacitive node group; Carrying out the touch-control status detection judges; Utilize relation reverse each other between pulse signal to reduce electromagnetic interference (EMI), can improve the stability of touch-control input device other element in the system.
Through the detailed description of above preferred specific embodiment, hope can be known description characteristic of the present invention and spirit more, and is not to come scope of the present invention is limited with the above-mentioned preferred specific embodiment that is disclosed.On the contrary, its objective is that hope can be in the arrangement of various modification of claim encompasses of the present invention and tool equality.
The primary clustering symbol description
1,3,5: touch- control input device 10,30,50: contact panel
12,32,52: touch control sensing circuit
100a, 100b, 100c, 300a, 300b, 300c: capacitive node
300,500: capacitive node t0, t1: time point
12: multitask selector switch 14,34: detection module
54: 56: the second detection modules of first detection module
320,520: select module 340,540,560: signal generator
322,522: the first multitask selector switchs
324,524: the second multitask selector switchs
120,320,520: control circuit
X1, X2, X3, X4, Xm:X direction lead
Y1, Y2, Y3, Y4, Yn:Y direction lead
Sdet: detect pulse signal Sinv: the rp pulse signal
Sdet+: first detects pulse signal Sdet-: second detects pulse signal.
Claims (17)
1. touch-control input device comprises:
Contact panel, it comprises:
A plurality of capacitive nodes form and are distributed on the said contact panel;
Select module, with said a plurality of capacitive nodes electric connections of said contact panel, said selection module is chosen set of first capacitive node and the second capacitive node set adjacent with said first capacitive node set from said a plurality of capacitive nodes; And
Detection module; Electrically connect with said selection module; Said detection module comprises a signal generator and detects pulse signal in order to produce; Said detection pulse signal is input to said first capacitive node set through said selection module; Said detection module is judged the touch control detection state of said first capacitive node set according to the said detection pulse signal that is input to said first capacitive node set, and said signal generator produces and the opposite rp pulse signal of said detection pulse signal phase place in the lump, and said rp pulse signal is input to said second capacitive node set through said selection module.
2. touch-control input device according to claim 1, wherein said contact panel are a projection type capacitance touch control panel.
3. touch-control input device according to claim 1; Wherein said contact panel comprises many directions X leads and many Y direction leads; Said many directions X leads and said many Y direction leads are arranged each other and are latticed, and each said a plurality of capacitive node forms with a Y direction lead wherein corresponding to directions X lead wherein.
4. touch-control input device according to claim 3, wherein said selection module comprises:
The first multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said first multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected wherein a directions X lead and is selected wherein Y direction lead from said many Y direction leads from said many directions X leads through the said first multitask selector switch, chooses one of them capacitive node to form said first capacitive node set from said a plurality of capacitive nodes of said contact panel thus; And
The second multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said second multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected wherein a directions X lead and is selected wherein Y direction lead from said many Y direction leads from said many directions X leads through the said second multitask selector switch, chooses one of them capacitive node to form said second capacitive node set from said a plurality of capacitive nodes of said contact panel thus.
5. touch-control input device according to claim 3, wherein said selection module comprises:
The first multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said first multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected at least one directions X lead and is selected at least one Y direction lead from said many Y direction leads from said many directions X leads through the said first multitask selector switch, from said a plurality of capacitive nodes of said contact panel, chooses at least one capacitive node thus to form said first capacitive node set; And
The second multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said second multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected at least one directions X lead and is selected at least one Y direction lead from said many Y direction leads from said many directions X leads through the said second multitask selector switch, from said a plurality of capacitive nodes of said contact panel, chooses at least one capacitive node thus to form said second capacitive node set.
6. touch-control input device according to claim 3, wherein said selection module comprises:
The first multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said first multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected the first directions X lead and said many Y direction lead ground connection or sky are connect through the said first multitask selector switch from said many directions X leads, thus with all capacitive nodes of choosing the corresponding said first directions X lead and form said first capacitive node and gather; And
The second multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said second multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected the second directions X lead and said many Y direction lead ground connection or sky are connect through the said second multitask selector switch from said many directions X leads, thus with all capacitive nodes of choosing the corresponding said second directions X lead and form said second capacitive node and gather.
7. touch-control input device according to claim 3, wherein said selection module comprises:
The first multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said first multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module through the said first multitask selector switch with said many directions X lead ground connection or sky connects and select a Y direction lead from said many Y direction leads, thus with all capacitive nodes of choosing a corresponding said Y direction lead and form said first capacitive node set; And
The second multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said second multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module through the said second multitask selector switch with said many directions X lead ground connection or sky connects and select the 2nd Y direction lead from said many Y direction leads, thus with all capacitive nodes of choosing corresponding said the 2nd Y direction lead and form said second capacitive node set.
8. touch-control input device according to claim 1; Wherein said detection module is according to the signal feedback of the said detection pulse signal that is input to said first capacitive node set; And then judge the said touch control detection state of said first capacitive node set, the capacitance variation of corresponding said first capacitive node set of wherein said signal feedback.
9. touch-control input device comprises:
Contact panel, it comprises:
A plurality of capacitive nodes form and are distributed on the said contact panel;
Select module, with said a plurality of capacitive nodes electric connections of said contact panel, said selection module is chosen set of first capacitive node and the second capacitive node set adjacent with said first capacitive node set from said a plurality of capacitive nodes; And
First detection module; Electrically connect with said selection module; Said first detection module comprises first signal generator and detects pulse signal in order to produce first; Said first detects pulse signal is input to said first capacitive node set through said selection module, and said first detection module is judged the first touch control detection state of said first capacitive node set according to the said first detection pulse signal that is input to said first capacitive node set; And
Second detection module; Electrically connect with said selection module; Said second detection module comprises secondary signal generator for generating second and detects pulse signal; It is opposite that the wherein said second detection pulse signal and said first detects the pulse signal phase place; Said second detects pulse signal is input to said second capacitive node set through said selection module, and said second detection module is judged the second touch control detection state of said second capacitive node set according to the said second detection pulse signal that is input to said second capacitive node set.
10. touch-control input device according to claim 9, wherein said contact panel are the projection type capacitance touch control panel.
11. touch-control input device according to claim 9; Wherein said contact panel comprises many directions X leads and many Y direction leads; Said many directions X leads and said many Y direction leads are arranged each other and are latticed, and each said a plurality of capacitive node forms with a Y direction lead wherein corresponding to directions X lead wherein.
12. touch-control input device according to claim 11, wherein said selection module comprises:
The first multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said first multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected wherein a directions X lead and is selected wherein Y direction lead from said many Y direction leads from said many directions X leads through the said first multitask selector switch, chooses one of them capacitive node to form said first capacitive node set from said a plurality of capacitive nodes of said contact panel thus; And
The second multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said second multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected wherein a directions X lead and is selected wherein Y direction lead from said many Y direction leads from said many directions X leads through the said second multitask selector switch, chooses one of them capacitive node to form said second capacitive node set from said a plurality of capacitive nodes of said contact panel thus.
13. touch-control input device according to claim 11, wherein said selection module comprises:
The first multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said first multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected at least one directions X lead and is selected at least one Y direction lead from said many Y direction leads from said many directions X leads through the said first multitask selector switch, from said a plurality of capacitive nodes of said contact panel, chooses at least one capacitive node thus to form said first capacitive node set; And
The second multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said second multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected at least one directions X lead and is selected at least one Y direction lead from said many Y direction leads from said many directions X leads through the said second multitask selector switch, from said a plurality of capacitive nodes of said contact panel, chooses at least one capacitive node thus to form said second capacitive node set.
14. touch-control input device according to claim 11, wherein said selection module comprises:
The first multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said first multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected the first directions X lead and said many Y direction lead ground connection or sky are connect through the said first multitask selector switch from said many directions X leads, thus with all capacitive nodes of choosing the corresponding said first directions X lead and form said first capacitive node and gather; And
The second multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said second multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module is selected the second directions X lead and said many Y direction lead ground connection or sky are connect through the said second multitask selector switch from said many directions X leads, thus with all capacitive nodes of choosing the corresponding said second directions X lead and form said second capacitive node and gather.
15. touch-control input device according to claim 11, wherein said selection module comprises:
The first multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said first multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module through the said first multitask selector switch with said many directions X lead ground connection or sky connects and select a Y direction lead from said many Y direction leads, thus with all capacitive nodes of choosing a corresponding said Y direction lead and form said first capacitive node set; And
The second multitask selector switch; Be connected between said contact panel and the said detection module; The said many directions X leads of said second multitask selector switch and said contact panel and said many Y direction leads electrically connect; Said selection module through the said second multitask selector switch with said many directions X lead ground connection or sky connects and select the 2nd Y direction lead from said many Y direction leads, thus with all capacitive nodes of choosing corresponding said the 2nd Y direction lead and form said second capacitive node set.
16. touch-control input device according to claim 9; Wherein said first detection module is according to the signal feedback of the said first detection pulse signal that is input to said first capacitive node set; And then judge the said first touch control detection state of said first capacitive node set, the capacitance variation of corresponding said first capacitive node set of wherein said signal feedback.
17. touch-control input device according to claim 9; Wherein said second detection module is according to the signal feedback of the said second detection pulse signal that is input to said second capacitive node set; And then judge the said second touch control detection state of said second capacitive node set, the capacitance variation of corresponding said second capacitive node set of wherein said signal feedback.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101608687A CN101968701B (en) | 2009-07-28 | 2009-07-28 | Touch input device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101608687A CN101968701B (en) | 2009-07-28 | 2009-07-28 | Touch input device |
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| CN101968701A CN101968701A (en) | 2011-02-09 |
| CN101968701B true CN101968701B (en) | 2012-08-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2508517B (en) * | 2012-02-10 | 2015-10-21 | Alterix Ltd | Digitiser |
| GB2499242A (en) | 2012-02-10 | 2013-08-14 | Alterix Ltd | methods of operating excitation circuitry and/or measurement circuitry in a digitiser and a method of manufacturing a transducer for a digitiser |
| CN103176675A (en) * | 2013-01-31 | 2013-06-26 | 敦泰科技有限公司 | Signal processing method, device, controller and equipment catering to projection capacitive screen |
| US11696483B2 (en) | 2020-05-22 | 2023-07-04 | Novatek Microelectronics Corp. | OLED touch and display driver integration chip and OLED touch display apparatus including thereof |
| TWI785620B (en) | 2020-05-22 | 2022-12-01 | 聯詠科技股份有限公司 | Oled touch and display driver integration chip and oled touch display apparatus including thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125530U (en) * | 1992-06-17 | 1992-12-23 | 上海市闸北区平行传感器厂 | Symmetry balance magnetic sensor |
| US20080165158A1 (en) * | 2007-01-05 | 2008-07-10 | Apple Inc. | Touch screen stack-ups |
| CN201218943Y (en) * | 2008-05-27 | 2009-04-08 | 比亚迪股份有限公司 | Condenser type touch screen |
-
2009
- 2009-07-28 CN CN2009101608687A patent/CN101968701B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125530U (en) * | 1992-06-17 | 1992-12-23 | 上海市闸北区平行传感器厂 | Symmetry balance magnetic sensor |
| US20080165158A1 (en) * | 2007-01-05 | 2008-07-10 | Apple Inc. | Touch screen stack-ups |
| CN201218943Y (en) * | 2008-05-27 | 2009-04-08 | 比亚迪股份有限公司 | Condenser type touch screen |
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