CN104750329A - Touch controller, touch system and detection method of touch screen - Google Patents
Touch controller, touch system and detection method of touch screen Download PDFInfo
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Abstract
The invention relates to a detection method of a touch screen, which comprises the following steps: firstly, full-screen driving detection is carried out on the touch screen to judge whether at least one external object approaches or touches the touch screen; then, when full-screen driving detection shows that at least one external object is not close to or touches the touch screen, updating judgment is carried out to judge whether an updating reference is executed within preset updating time; and when the updating judgment shows that the reference exceeds the preset updating time and the updating is not executed, updating the reference according to the first two-dimensional sensing information. The invention also provides a touch controller and a touch system. By means of the invention, misjudgment caused by conductive substances such as water and the like can be avoided.
Description
Technical field
The present invention has about a kind of method for detecting touching controller, touching system and touch-screen, particularly a kind of method for detecting can avoiding touching controller because of water erroneous judgement, touching system and touch-screen.
Background technology
Existing known mutual capacitance type sensor (mutual capacitive sensor), comprise insulation top layer, the first conductive layer, dielectric layer, the second conductive layer, wherein the first conductive layer and the second conductive layer and have many first buss and the second bus respectively, these buss can be made up of the connecting line of multiple conducting strip and series conductor sheet.
When carrying out mutual capacitance type detecting, one of the first conductive layer and the second conductive layer are driven, and another of the first conductive layer and the second conductive layer is detected.Such as, drive singal is provided to each first bus one by one, and be provided the first bus of drive singal corresponding to each, the signal detecting the second all buss represents the capacitive couplings signal of confluce between the first bus and all second buss being provided drive singal.Whereby, the capacitive couplings signal representing confluce between all first buss and the second bus can be obtained, become capacitance image.
Accordingly, capacitance image when not touched can be obtained as benchmark, difference by between the capacitance image that comparison basis and Subsequent detection arrive, judge whether by external conductive object close to or cover, and further judge by close to or the position that covers.
But, if there is conductive materials to stride across the bus of more than two on insulation top layer, by external conductive object close to or when covering, also may cause the change of capacitance image because of the capacitive couplings between conductive materials and bus, and cause erroneous judgement.Such as, water stain insulate top layer strides across the bus of more than two time, capacitance image can be caused to change, takeed for finger and pressed.
As can be seen here, above-mentioned prior art obviously has inconvenience and defect, and pole waits to be further improved.In order to solve above-mentioned Problems existing, relevant manufactures there's no one who doesn't or isn't seeks solution painstakingly, but have no applicable design for a long time to be completed by development always, and common product and method do not have appropriate structure and method to solve the problem, this is obviously the anxious problem for solving of relevant dealer.Therefore how to found a kind of new technology, one of current important research and development problem of real genus, also becomes the target that current industry pole need be improved.
Summary of the invention
The object of the present invention is to provide a kind of method for detecting touching controller, touching system and touch-screen, the erroneous judgement because the conductive materials such as water cause can be avoided.
The object of the invention is to realize by the following technical solutions.The invention provides a kind of method for detecting of touch-screen, comprising: full frame drivings detecting is performed to this touch-screen, close or touch this touch-screen to judge whether to exist at least one external object; When this full frame driving detecting display do not exist this at least one external object close to or touch this touch-screen time, perform to upgrade and judge, upgrade benchmark to judge whether once to perform within the scheduled update time; And when this renewal judge this benchmark of display exceed this scheduled update time do not perform renewal time, upgrade this benchmark according to the first two-dimentional sensitive information.
Object of the present invention also can be applied to the following technical measures to achieve further.
The method for detecting of aforesaid touch-screen, wherein exceed predetermined detecting number of times when this full frame driving detecting execution exceedes the predetermined detecting time or performs continuously, do not detect yet exist this at least one external object close to or touch this touch-screen time, it is close or touch this touch-screen to there is not this at least one external object in this full frame drivings detecting display.
The method for detecting of aforesaid touch-screen, wherein after this benchmark of renewal, repeats this full frame driving detecting.
The method for detecting of aforesaid touch-screen, wherein when this renewal judges that this benchmark of display once performed renewal within this scheduled update time, repeats this full frame driving detecting.
The method for detecting of aforesaid touch-screen, it more comprises: when this full frame driving detecting display exist at least one external object close to or when touching this touch-screen, perform the detecting of two-dimentional mutual capacitance type to obtain the second two-dimentional sensitive information, to judge the position of this at least one external object according to this second two-dimentional sensitive information; And repeat this full frame driving detecting.
The method for detecting of aforesaid touch-screen, wherein this touch-screen comprises many first buss and many second buss, and this full frame driving detecting comprises: provide drive singal in whole first bus simultaneously; There is provided drive singal simultaneously when whole first bus, the mutual capacitance coupled signal of all second buss is detected, the one dimension sensitive information produced with the signal obtained according to all second buss; And according to this one dimension sensitive information judge whether to exist at least one external object close to or touch this touch-screen.
The method for detecting of aforesaid touch-screen, wherein this touch-screen comprises many first buss and many second buss, and when this full frame driving detecting display do not exist at least one external object close to or touch this touch-screen time, perform the detecting of two-dimentional mutual capacitance type to obtain this first two-dimentional sensitive information, wherein this two-dimentional mutual capacitance type detecting comprises: the one or more different bus providing drive singal in turn in described first bus; When being provided drive singal respectively at the one or more different bus in described first bus each time, detect the signal of all second buss, with the mutual capacitance coupled signal obtained according to all second buss produce corresponding to the one dimension sensitive information of the first bus being provided drive singal; And gather each corresponding to being provided the one dimension sensitive information of the first bus of drive singal to produce this first two-dimentional sensitive information.
Object of the present invention also realizes by the following technical solutions.The present invention also provides a kind of touching controller, performs following operation: perform full frame drivings detecting to touch-screen, close or touch this touch-screen to judge whether to exist at least one external object; When this full frame driving detecting display do not exist this at least one external object close to or touch this touch-screen time, perform to upgrade and judge, upgrade benchmark to judge whether once to perform within the scheduled update time; And when this renewal judge this benchmark of display exceed this scheduled update time do not perform renewal time, upgrade this benchmark according to the first two-dimentional sensitive information.
Object of the present invention also can be applied to the following technical measures to achieve further.
Aforesaid touching controller, wherein exceed predetermined detecting number of times when this full frame driving detecting execution exceedes the predetermined detecting time or performs continuously, do not detect yet exist this at least one external object close to or touch this touch-screen time, it is close or touch this touch-screen to there is not this at least one external object in this full frame drivings detecting display.
Aforesaid touching controller, wherein after this benchmark of renewal, repeats this full frame driving detecting.
Aforesaid touching controller, wherein when this renewal judges that this benchmark of display once performed renewal within this scheduled update time, repeats this full frame driving detecting.
Aforesaid touching controller, it more performs following operation: when this full frame driving detecting display exist at least one external object close to or when touching this touch-screen, perform the detecting of two-dimentional mutual capacitance type to obtain the second two-dimentional sensitive information, to judge the position of this at least one external object according to this second two-dimentional sensitive information; And repeat this full frame driving detecting.
Aforesaid touching controller, wherein this touch-screen comprises many first buss and many second buss, and this full frame driving detecting comprises: provide drive singal in whole first bus simultaneously; There is provided drive singal simultaneously when whole first bus, the signal obtained according to all second buss is detected to the mutual capacitance coupled signal of all second buss and produces one dimension sensitive information; And according to this one dimension sensitive information judge whether to exist at least one external object close to or touch this touch-screen.
Aforesaid touching controller, wherein this touch-screen comprises many first buss and many second buss, and when this full frame driving detecting display do not exist at least one external object close to or touch this touch-screen time, perform the detecting of two-dimentional mutual capacitance type to obtain this first two-dimentional sensitive information, wherein this two-dimentional mutual capacitance type detecting comprises: the one or more different bus providing drive singal in turn in described first bus; When being provided drive singal respectively at the one or more different bus in described first bus each time, the signal detecting all second buss produces the one dimension sensitive information corresponding to the first bus being provided drive singal with the mutual capacitance coupled signal obtained according to all second buss; And gather each corresponding to being provided the one dimension sensitive information of the first bus of drive singal to produce this first two-dimentional sensitive information.
Object of the present invention realizes more by the following technical solutions.The present invention more provides a kind of touching system, comprises: touch-screen; And touching controller, perform following operation: full frame drivings detecting is performed to this touch-screen, close or touch this touch-screen to judge whether to exist at least one external object; When this full frame driving detecting display do not exist this at least one external object close to or touch this touch-screen time, perform to upgrade and judge, upgrade benchmark to judge whether once to perform within the scheduled update time; And when this renewal judge this benchmark of display exceed this scheduled update time do not perform renewal time, upgrade this benchmark according to the first two-dimentional sensitive information.
Object of the present invention also can be applied to the following technical measures to achieve further.
Aforesaid touching system, wherein exceed predetermined detecting number of times when this full frame driving detecting execution exceedes the predetermined detecting time or performs continuously, do not detect yet exist this at least one external object close to or touch this touch-screen time, it is close or touch this touch-screen to there is not this at least one external object in this full frame drivings detecting display.
Aforesaid touching system, wherein after this benchmark of renewal, repeats this full frame driving detecting.
Aforesaid touching system, wherein when this renewal judges that this benchmark of display once performed renewal within this scheduled update time, repeats this full frame driving detecting.
Aforesaid touching system, wherein this touching controller more performs following operation: when this full frame driving detecting display exist at least one external object close to or when touching this touch-screen, perform the detecting of two-dimentional mutual capacitance type to obtain the second two-dimentional sensitive information, to judge the position of this at least one external object according to this second two-dimentional sensitive information; And repeat this full frame driving detecting.
Aforesaid touching system, wherein this touch-screen comprises many first buss and many second buss, and this full frame driving detecting comprises: provide drive singal in whole first bus simultaneously; There is provided drive singal simultaneously when whole first bus, the mutual capacitance coupled signal of all second buss is detected to obtain the one dimension sensitive information that the signal according to all second buss produces; And according to this one dimension sensitive information judge whether to exist at least one external object close to or touch this touch-screen.
Aforesaid touching system, wherein this touch-screen comprises many first buss and many second buss, and when this full frame driving detecting display do not exist at least one external object close to or touch this touch-screen time, perform the detecting of two-dimentional mutual capacitance type to obtain this first two-dimentional sensitive information, wherein this two-dimentional mutual capacitance type detecting comprises: the one or more different bus providing drive singal in turn in described first bus; When being provided drive singal respectively at the one or more different bus in described first bus each time, the signal detecting all second buss produces the one dimension sensitive information corresponding to the first bus being provided drive singal with the mutual capacitance coupled signal obtained according to all second buss; And gather each corresponding to being provided the one dimension sensitive information of the first bus of drive singal to produce this first two-dimentional sensitive information.
By technique scheme, the present invention at least has following advantages and beneficial effect:
1. what no matter whether touch-screen has the ground of not coupled external attaches water stain or other conductive bodies, the full frame external conductive object driving detecting can judge the ground whether having coupled external close to or cover, and can further confirm without the ground of coupled external external conductive object close to or covering carry out datum renewal; And
2. full frame driving detecting is compared to the detecting of two-dimensions mutual capacitance type, and save time power saving, is more suitable for and judges whether to enter battery saving mode.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of instructions, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Figure 1A and Figure 1B is the schematic diagram of position detection system.
Fig. 1 C to Fig. 1 F is the structural representation of sensed layer.
Fig. 2 A and Fig. 2 B is the schematic diagram of the capacitance type sensor of tool screening conductive bar.
Fig. 2 C is the schematic diagram of two-dimensions mutual capacitance type detecting.
Fig. 2 D is the full frame schematic diagram driving detecting.
Fig. 2 E is that the schematic flow sheet carrying out the detecting of two-dimensions mutual capacitance type is again detected in the full frame driving of first carrying out proposed according to the first embodiment of the present invention.
Fig. 3 is the schematic flow sheet judging position according to the full frame result driving detecting and two-dimensions mutual capacitance type to detect proposed according to the second embodiment of the present invention.
Fig. 4 A to Fig. 4 C is the schematic flow sheet judging position according to the full frame result driving detecting and mutual capacitance type to detect proposed according to the third embodiment of the present invention.
Fig. 5 A is a kind of schematic flow sheet upgrading benchmark proposed according to the fourth embodiment of the present invention.
Fig. 5 B is a kind of schematic flow sheet upgrading benchmark proposed according to the fifth embodiment of the present invention.
Fig. 6 is the schematic flow sheet of a kind of touch panel communication according to sixth embodiment of the present invention proposition.
Fig. 7 be propose according to the seventh embodiment of the present invention one carry out with touch-screen the schematic diagram that communicates.
Fig. 8 is the block flow diagram of the method for detecting of the touch-screen of the embodiment of the present invention.
[main element symbol description]
100: position detecting apparatus 110: display
120: touch-screen 120A first sensed layer
120B: the second sensed layer 130: driving/detecting unit
140: bus 160: controller
161: processor 162: storer
170: main frame 171: CPU (central processing unit)
173: storage element 11,13,14,16: conducting strip
12: the second connecting line 15: the first connecting lines
17: dielectric base 18: insulation course
19: insulation top layer 21: screening conductive bar
140B, 22: the second bus 140A, 23: the first buss
24: opening 25: conducting strip
PWM: pulse width modulation signal S: signal
71: the first touch-screen 72: the second touch-screens
73,74: the bus 800 ~ 850 of coupling grounding current potential: step
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to a kind of embodiment, structure, feature and the effect thereof touching the method for detecting of controller, touching system and touch-screen proposed according to the present invention, be described in detail as follows.
It is as follows that the present invention will describe some embodiments in detail.But except disclosed embodiment, the embodiment that the present invention can also be used in other is widely implemented.Scope of the present invention by the restriction of those embodiments, is not be as the criterion with claim thereafter.And summary of the invention of the present invention can be understood for providing clearer description and making to be familiar with this those skilled in the art, in diagram, each several part is not drawn according to its relative size, the ratio regular meeting of some size and other scale dependents is seemed by highlighting and exaggerates, and incoherent detail section is not also drawn completely, in the hope of succinctly illustrated.
Please refer to Figure 1A, the present invention proposes a kind of position detecting apparatus 100, comprises touch-screen 120, with driving/detecting unit 130.Touch-screen 120 has sensed layer.In one of the present invention example, the first sensed layer 120A and the second sensed layer 120B can be comprised, first sensed layer 120A and the second sensed layer 120B has multiple bus 140 respectively, and wherein many second bus 140B of many first bus 140A and the second sensed layer 120B of the first sensed layer 120A are overlapping.In another example of the present invention, many first bus 140A and the second bus 140B can be configured in coplanar sensed layer.Driving/detecting unit 130 produces sensitive information according to the signal of many buss 140.Such as when self-capacitance is detected, be the driven bus 140 of detecting, and when mutual capacitance type is detected, detecting do not driven/partially conductive the bar 140 of detecting unit 130 Direct driver.In addition, touch-screen 120 can be configure on display 110, and between touch-screen 120 and display 110 can be has configuration screen layer (shielding layer) (not showing in illustrating) or do not configure screen layer.In preferable example of the present invention, in order to make the thickness of touch-screen 120 thinner, between touch-screen 120 and display 110, do not configure screen layer.
Position detecting apparatus 100 of the present invention can be applied in computer system, example as shown in Figure 1B, comprises controller 160 and main frame 170.Controller comprises driving/detecting unit 130, with operatively coupling touchscreen 120 (not showing in diagram).In addition, controller 160 can comprise processor 161, and control driving/detecting unit 130 and produce sensitive information, sensitive information can be stored in storer 162, accesses for processor 161.In addition, main frame 170 forms the main body of computing system, mainly comprises CPU (central processing unit) 171, and for the storage element 173 that CPU (central processing unit) 171 accesses, and the display 110 of display operation result.
In another example of the present invention, transport interface is comprised between controller 160 and main frame 170, control module transmits data to main frame through transport interface, and those skilled in the art can know transport interface by inference and include but not limited to the various wired or wireless transport interface such as UART, USB, I2C, Bluetooth, WiFi, IR.In example of the present invention, the data of transmission can be position (as coordinate), identification result (as gesture code), order, sensitive information or the available information of other controllers 160.
In example of the present invention, sensitive information can be control produced initial sensitive information (initial sensing information) by processor 161, main frame 170 is transferred to carry out position analysis, such as position analysis, gesture judgement, order identification etc.In another example of the present invention, sensitive information can be first analyzed by processor 161, then the position judged, gesture, order etc. are submitted to main frame 170.The present invention includes but be not limited to aforesaid example, those skilled in the art can know the interaction between other controller 160 and main frames 170 by inference.
Please refer to shown in Fig. 1 C, is a kind of embodiment (pattern) of capacitive touch screen, comprises multiple conducting strip (conductive plate) and many connecting lines.These connecting lines comprise many first connecting lines and many second connecting lines.These first connecting lines are with first direction (as one of transverse direction or longitudinal direction) configuration, connect a part for these conducting strips, to form many buss towards first direction arrangement.Similarly, these second connecting lines be with second direction (as laterally or another of longitudinal direction) configuration, connect another part of these conducting strips, to form many buss arranged towards second direction.
These buss (the first bus and the second bus) can be made up of transparent or opaque material, such as, can be to be made up of transparent tin indium oxide (ITO).Structurally can be divided into single layer structure (SITO; Single ITO) and double-decker (DITO; Double ITO).Those skilled in the art can know the material of other buss by inference, are repeating no more.Such as, CNT.
In this example, be using longitudinally as first direction, and using laterally as second direction, therefore longitudinal bus is the first bus, and the bus of transverse direction is the second bus.Those skilled in the art can know one of above-mentioned example being illustrated as invention by inference, are not used for limiting the present invention.Such as, can be using laterally as first direction, and using longitudinally as second direction.In addition, the first bus can be identical with the number of the second bus, and also can be different, such as, the first bus has N bar, and the second bus has M bar.
Fig. 1 E is the sectional view at I-I place in Fig. 1 C, comprises dielectric base 17 (substrate), the part (containing conducting strip 11, second connecting line 12, conducting strip 13) of the second bus, insulation course 18, a part (containing the first connecting line 15) and insulation top layer 19 with the first bus.In example of the present invention, dielectric base 17, insulation course 18 are formed with transparent or opaque material with insulation top layer 19, as glass or plastic film (film), those skilled in the art can know other constituted modes of this example by inference, do not repeat them here.
In example of the present invention, Fig. 1 D is the sectional view at II-II place in Fig. 1 C, for a kind of structural representation of double-layer capacitance type touch-screen, comprise dielectric base 17 (substrate), the part (containing the second connecting line 12) of the second bus, insulation course 18, a part (containing conducting strip 14, first connecting line 15, conducting strip 16) and insulation top layer 19 with the first bus.In other words, in example of the present invention, capacitive touch screen sequentially comprises the second sensed layer of the second bus described in insulation top layer, the first sensed layer of the first bus described in tool, insulation course, tool.In another example of the present invention, capacitive touch screen has two relative long limits and the rectangle of two relative minor faces, and the first wherein said bus is arranged in parallel with two relative minor faces, and the second described bus is arranged in parallel with relative two long limits.
In example of the present invention, Fig. 1 F is the sectional view at I-I place in Fig. 1 C, for a kind of structural representation of monolayer capacitive touch screen, comprise dielectric base 17 (substrate), the part (containing the second connecting line 12) of the second bus, insulation course 18, a part (containing conducting strip 14, first connecting line 15, conducting strip 16) and insulation top layer 19 with the first bus.Second connecting line 12 of conducting strip 14,15 and second bus of the first bus is copline, and the first connecting line 15 strides across the second connecting line 12 in the mode of building bridge, and is wherein completely cut off by insulation course 18 between the first connecting line 15 and the second connecting line 12.Those skilled in the art can know other bridge formation mode by inference, do not repeat them here.Such as relative to the upwards bridge formation mode of this example, it can be mode of building bridge downwards.
Can add between the first described bus and the second bus and shield (guarding or shielding) bus, screening conductive bar can improve the variable quantity of the mutual electrical couplings signal detected, more can reduce from external conductive object noise with flow to external conductive object through external conductive object by capacitive touch screen and flow into negative that capacitive touch screen causes again and touch problem.When screening conductive bar is between the first bus and the second bus, and when screening conductive bar is provided DC potential or is coupled in the ground of system, screening conductive bar can shield (shielding) first direct capacitive couplings between bus and the second bus, and the variable quantity of the external conductive object impact that can be coupled in ground in mutual electrical couplings signal is increased.
Such as shown in Fig. 2 A and Fig. 2 B, for the schematic diagram of the capacitance type sensor of tool screening conductive bar, screening conductive bar 21 and the first bus 23 interconnected and expose each other, and the first bus 23 has multiple opening 24 that the conducting strip 25 of the second bus 22 can be exposed mutually with the first bus 22.
Please refer to Fig. 2 C, when carrying out the detecting of two-dimensions mutual capacitance type, the drive singal (such as pulse width modulation signal PWM) exchanged sequentially is provided to each first bus 23, and obtaining via the signal S of the second described bus 22 the dimension sensitive information being provided the bus of drive singal corresponding to each, the sensitive information gathered corresponding to all first buss 23 then forms two-dimensions sensitive information.A described dimension sensitive information can be produce according to the signal of the second described bus 22, also can be produce according to the described signal of the second bus 22 and the measures of dispersion of benchmark.In addition, sensitive information can be the electric current of basis signal, voltage, capacitive couplings amount, the quantity of electric charge or other characteristic electrons produce, and can be exist with the form of analog or digital.Drive singal is supplied to one of described first bus 23 in turn in this example, and the technician that the art has usual knowledge can know by inference, and drive singal is supplied to 2 or many adjacent in described first bus 23 in turn.
Such as, in example of the present invention, it is one that provides drive singal in turn in described first bus, and when being provided drive singal respectively at each first bus in described first bus, the signal detecting all second buss produces the dimension sensitive information corresponding to the first bus being provided drive singal with the signal obtained according to all second buss, gathers each corresponding to being provided the dimension sensitive information of the first bus of drive singal to produce two-dimensions sensitive information.In another example of the present invention, it is a pair that provides drive singal in turn in described first bus, and when being simultaneously provided drive singal respectively at every a pair first buss in described first bus, the signal detecting all second buss produces the dimension sensitive information corresponding to the first bus being provided drive singal with the signal obtained according to all second buss, gather each corresponding to the dimension sensitive information of the first bus being provided drive singal, to produce two-dimensions sensitive information.
The technician that the art has usual knowledge can know by inference, judges the position of each external conductive object be coupled to ground according to described two-dimensions sensitive information.Be such as with the mode of watershed divide algorithm, articles method or other Image Segmentations to the external conductive object judged each and be coupled to ground close to or the scope of touching, then judge position further.Be such as with outside shaping claviform close to or the signal value of scope of touching to calculate barycenter (center of gravity) position (centroid position).Do not have actually external conductive object close to or cover touch-screen time, system do not judge external conductive object close to or cover touch-screen time, position detecting apparatus can by the second described bus signal produce benchmark.Sensitive information can be produce according to the signal of the second bus, or deducting benchmark according to the signal of the second bus produced.At the former, the difference via sensitive information and benchmark can be used to judge just to touch and/or negatively to touch, and the latter be preferable example of the present invention, and sensitive information itself has presented and difference between benchmark, can directly be used for judging just touching and/or negative tactile.Benchmark can be obtain in the starting stage of position detecting apparatus and/or obtain repeatedly in the running stage of position detecting apparatus.
In the following description, external conductive object close to or cover touch-screen time, cause just tactile, in sensitive information corresponding to just touch part, be considered as positive sense of touch measurement information.On the contrary, present in sensitive information and be referred to as negative sense of touch measurement information with the part of positive sense of touch measurement information opposite characteristic, represent negative and touch.The formation of positive sense of touch measurement information not necessarily complete by external conductive object close to or cover touch-screen and cause, external conductive object close to or cover touch-screen and just form one of reason just touched.Described sensitive information includes but not limited to a dimension sensitive information or two-dimensions sensitive information.In addition, negative formation of touching not necessarily has external conductive object or any material to be positioned at corresponding position.Moreover positive sense of touch measurement information can be to meet or similar to just touching the sensitive information that causes, necessarily unactual external conductive object close to or cover touch-screen and caused.Such as, when what a dimension sensitive information presented is the signal value of bus, positive sense of touch measurement information can be increase progressively successively decrease again on the occasion of or the negative value increased progressively again of successively decreasing, and negative sense of touch measurement information is contrary with positive sense of touch measurement information.Again such as, when what one dimension sensitive information presented is the difference of bus and another bus, positive sense of touch measurement information can be increase progressively successively decrease again on the occasion of adding the negative value of successively decreasing and increasing progressively again, namely first on the occasion of negative value again, and negative sense of touch measurement information is contrary with positive sense of touch measurement information.
When top layer attaching conductive materials when insulating, such as water, sensitive information may have different changes because of the conductive materials size that attach.When the area that conductive materials attaches is less, the capacitive couplings between conductive materials and bus may present negative sense of touch measurement information.But when the area that conductive materials attaches is larger, the capacitive couplings between conductive materials and bus, except presenting negative sense of touch measurement information, also may present positive sense of touch measurement information.When water distribution is in many regions, many positive sense of touch measurement informations and negative sense of touch measurement information may be presented, cause erroneous judgement.
If only present negative sense of touch measurement information in sensitive information, and without any positive sense of touch measurement information, can be judged to be that insulation top layer attaches conductive materials.In addition, if there is negative sense of touch measurement information in sensitive information, and at the positive sense of touch measurement information of the marginal existence of negative sense of touch measurement information, also can be judged to be that insulation top layer attaches conductive materials.When being judged to be that insulation top layer attaches conductive materials, conductive materials can be attached in prompt system or user top layer of insulating, and the disposal of products for further.Can be such as suspend the renewal of benchmark or do not provide the position of any external conductive object detected, until attaching of conductive materials is excluded.But above-mentioned situation is only limitted to attaching of conductive materials is small size.
In addition, the present invention proposes a kind of dimension mutual capacitance type detecting (one dimensional mutualcapacitive detection with full screen driven) of full frame driving, hereinafter referred to as full frame driving detecting (full screendriven detection).Please refer to Fig. 2 D, in preferable example of the present invention, position detecting apparatus must possess provides drive singal to the ability of whole first bus simultaneously, is full frame driving hereinafter referred to as providing drive singal (such as pulse width modulation signal PWM) simultaneously to whole first bus.When each full frame driving, the signal according to described all or part of bus produces at least one dimension sensitive information.As discussed previously, a dimension mutual capacitance type detecting of full frame driving also has its benchmark.In addition, when touch-screen exists screening conductive bar 21, full frame driving more comprises provides drive singal to whole screening conductive bars 21 simultaneously, that is, provide drive singal to the first whole buss 23 and screening conductive bar 21 simultaneously.In the following description, when full frame driving detecting, provide drive singal also to represent to the first whole buss 23 provides drive singal to whole screening conductive bars 21 simultaneously simultaneously.If only there is the first described bus 23 and the second bus 22 in touch-screen, and when there is not described screening conductive bar, full frame driving only includes provides drive singal to the first whole buss simultaneously.
If only provide drive singal to single bus, drive singal may cause negative tactile or just tactile through the conductive materials capacitive couplings attached in other bus.When full frame all first buss are all provided drive singal, the current potential of each the first bus is all identical, can not produce above-mentioned problem.
In addition, when full frame all first buss are all provided drive singal, external conductive object close to or covering can present positive sense of touch measurement information, can judge whether whereby external conductive object close to or cover, external conductive object close to or cover bus and/or external conductive object close to and touching a latitude coordinates.
Such as, provide drive singal in the first whole buss simultaneously, and when described first bus is provided drive singal simultaneously, detect the signal of all second buss to obtain a dimension sensitive information of the signal composition of all second buss.When each value of one dimension sensitive information is the signal presenting one of the second described bus respectively, can be judge in a dimension sensitive information, whether to there is at least one value exceeding threshold limit value with threshold limit value, when there is at least one value and exceeding threshold limit value, represent that at least one the external conductive object be coupled to ground is close or touch touch-screen.
In example of the present invention, when touch-screen has aforesaid screening conductive bar.When performing full frame driving detecting, simultaneously drive singal is supplied to described screening conductive bar and the first described bus.When the detecting of execution two-dimensions mutual capacitance type, when drive singal is provided, described screening conductive bar is the ground being provided DC potential simultaneously or being coupled in system.
Such as, the arrangement for detecting of a kind of touch-screen proposed according to the present invention, comprise: touch-screen, touch-screen comprises many first buss, many second buss and many screening conductive bars, and the first wherein said bus, the second bus and screening conductive bar expose mutually; Controller, controller performs full frame driving detecting, comprising: provide drive singal in whole first bus and whole screening conductive bars simultaneously; There is provided drive singal simultaneously when whole first bus and whole screening conductive bars, the signal obtained according to all second buss is detected to the mutual capacitance coupled signal of all second buss and produces a dimension sensitive information; And according to a dimension sensitive information judge whether to exist at least one external conductive object be coupled to ground close to touching touch-screen; And controller judges to there is at least one external conductive object be coupled to ground close to during with touching touch-screen according to a dimension sensitive information, perform the detecting of two-dimensions mutual capacitance type to obtain two-dimensions sensitive information, to judge the position of each external conductive object be coupled to ground according to two-dimensions sensitive information, wherein the detecting of two-dimensions mutual capacitance type comprises: the one or more different bus providing drive singal in turn in described first bus, and provides all screening conductive bar DC potential; When being provided drive singal respectively at the one or more different bus in described first bus each time, the signal detecting all second buss produces the dimension sensitive information corresponding to the first bus being provided drive singal with the mutual capacitance coupled signal obtained according to all second buss; And gather each corresponding to being provided the dimension sensitive information of the first bus of drive singal to produce two-dimensions sensitive information.
In addition, a dimension sensitive information also can be produce in the mode of difference or two difference.Such as, when each value of a dimension sensitive information is signal difference (the difference of the signals) presenting a pair of the second described bus respectively, can be judge that whether there is at least one in a dimension sensitive information is positioned at adjacent zero confluce (zero-crossing) on the occasion of between negative value, when there is at least one zero confluce, represent that at least one at least one external conductive object be coupled to ground is close or touch touch-screen.Wherein, adjacently refer on the occasion of between negative value, to there is not any value or only there is null value on the occasion of adjacent described in negative value.In addition, in example of the present invention, the value falling within predetermined null value scope is all considered as null value, and wherein null value scope comprises zero.Because capacitive touch screen detecting is subject to the interference of external noise, adopt null value scope can reduce erroneous judgement and by data sheet purifying.In example of the present invention, suppose that the signal of described second bus is sequentially respectively S1, S2 ..., Sn, and a dimension sensitive information adopts difference, the value of a dimension sensitive information is sequentially respectively S1-S2, S2-S3 ..., Sn-1-Sn.
Each value of one dimension sensitive information be to present respectively in the second described bus two to the signal difference of the second bus poor time, can be judge in a dimension sensitive information, whether to there is at least one value exceeding threshold limit value with threshold limit value, when there is at least one value and exceeding threshold limit value, represent that at least one at least one external conductive object be coupled to ground is close or touch touch-screen.In addition, also can be judge whether that there is between existence two 0 confluce at least one value exceeding threshold limit value, when there is at least one value exceeding threshold limit value when between existence two 0 confluce, represent that at least one at least one external conductive object be coupled to ground is close or touch touch-screen.In example of the present invention, suppose that the signal of described second bus is sequentially respectively S1, S2,, Sn, and a dimension sensitive information adopts two difference, the value of one dimension sensitive information is sequentially respectively ((S2-S3)-(S1-S2)), ((S3-S4)-(S2-S3)) ..., ((Sn-1-Sn)-(Sn-2-Sn-1)).In the best mode of the present invention, a dimension sensitive information adopts two difference.
In simple terms, in aforesaid example can be judge whether to exist the value that exceedes threshold limit value or zero confluce judged whether at least one be coupled to ground external conductive object close to or touching touch-screen.The technician that the art has usual knowledge can know by inference, and a dimension sensitive information also can be other forms beyond signal value, difference or two difference, and such as each value is the difference of non-adjacent signal value, and the present invention is not limited at this.
In optimal mode of the present invention (best mode), position detecting apparatus must possess provides drive singal to the ability of the ability of whole first bus with the second bus described in detecting simultaneously.That is while full frame driving, the signal according to the second described bus produces a dimension sensitive information.The detecting of the second described bus can be one by one, scans many simultaneously, scan whole second bus to obtain the sensitive information of corresponding all second buss simultaneously, is called that full frame driving is detected in the following description.In other words, full frame driving detecting is included in and drives all driving time bus (as all first buss) to detect all mutual capacitance coupled signals by detecting bus (as all second buss).
Meeting under enough resolutions, along with the increase of the size of touch-screen, the number of bus also increases, but the pin position that controller can be used for detecting bus simultaneously but must along with increase.In the detecting of two-dimensions mutual capacitance type, only need be detected by the bus of single axial, the second bus as the aforementioned.As long as therefore position detecting apparatus increases the ability of full frame driving, just directly can use the framework of the second bus described in detecting originally had, carry out full frame driving detecting.In preferable example of the present invention, the quantity of the second bus is less than the quantity of the first bus.
In another example of the present invention, position detecting apparatus must possess provides drive singal to the ability of the ability of whole first bus with all buss of detecting simultaneously.That is while full frame driving, the signal according to the first described bus produces the one one dimension sensitive information, and produce the 21 dimension sensitive information according to the signal of the second described bus.Relative to last example, position detecting apparatus also must have the ability of the first bus described in detecting.
Comprehensively above-mentioned, when full frame driving detecting, if there is no the close of external conductive object or cover, no matter whether have attaching of conductive materials, all can not judge just touching, that is sensitive information can not present positive sense of touch measurement information.In example of the present invention, be judged whether just tactile by full frame driving detecting, or judge whether the close of external conductive object or cover.In another example of the present invention, be drive detecting to judge bus that is close by external conductive object or that cover by full frame, can be only have the second capped bus, can also be the first capped bus and the second bus.In an example more of the present invention, by full frame driving detecting coordinate, can be judge a latitude coordinates by a single dimension sensitive information, or judge the one one latitude coordinates and the 21 latitude coordinates respectively by aforementioned one one dimension sensitive information and the 21 dimension sensitive information, i.e. two-dimensions coordinate.
Aforesaid position detecting apparatus can be possess the full frame ability driving detecting and two-dimensions mutual capacitance type to detect.Such as drive singal can be supplied to whole, many or first bus simultaneously, and is detect a dimension sensitive information or two-dimensions sensitive information by the second described bus.
Please refer to Fig. 2 E, is that the schematic flow sheet carrying out the detecting of two-dimensions mutual capacitance type is again detected in the full frame driving of first carrying out proposed according to the first embodiment of the present invention.As indicated in step 210, full frame driving detecting is carried out, to produce a dimension sensitive information.Next as shown at step 220, judge whether to carry out the detecting of two-dimensions mutual capacitance type according to a dimension sensitive information.Such as, if a dimension sensitive information is judged the close of external conductive object or covered, then as shown in step 230, carry out the detecting of two-dimensions mutual capacitance type, to produce two-dimensions sensitive information, more as illustrated in step 240, judge the position of external conductive object according to two-dimensions sensitive information.
In a step 220, if do not judge the close of external conductive object or cover, then get back to step 210, re-start full frame driving detecting.In example of the present invention, it is fixing for carrying out the full frame cycle driving detecting, and namely carry out repeatedly in the time of full frame driving detecting continuously at one section, the full frame interval time driving detecting of adjacent twice is all the detecting cycle.In arbitrary detecting cycle, if do not judge the close of external conductive object or cover, only need consume and carry out once the full frame electric power driving detecting, otherwise, need to consume and carry out once full framely driving the electric power of detecting and the electric power carrying out N dimension mutual capacitance type and detect (namely two-dimensions mutual capacitance type is detected).The aforesaid detecting cycle can adjust on demand, and such as in a power-save mode, the time in detecting cycle can be elongated, to save electric power, and in the normal mode, the detecting cycle can shorten, to improve detecting frequency, that is improve report point (coordinate) rate.Relatively, in another example of the present invention, the detecting cycle can be unfixed.Such as in a step 220, judge there is no the close of external conductive object or cover, just again carry out step 210 again.Such as, in the normal mode, only need to carry out the full mutual tolerance formula detecting of two-dimensions, otherwise be carry out full frame driving detecting repeatedly.If need to carry out the full mutual tolerance formula detecting of two-dimensions, then, after carrying out step 230 or after carrying out step 230 and 240, re-start step 210.
In addition, carry out full frame driving detecting according to the first detecting frequency, after Preset Time or number of times, all there is no the close of external conductive object or cover, then change to adopt and carry out full frame driving detecting according to the second detecting frequency, until detect the close of external conductive object or cover, then change back again and carry out full frame driving detecting according to the first detecting frequency.Such as, drive singal is being supplied to whole first bus, and do not judge that the external conductive object that is coupled to ground is close to during with touching touch-screen through Preset Time or number of times being supplied to whole first bus with first frequency, drive singal changes and is supplied to whole first bus with second frequency, and wherein first frequency is faster than second frequency.In addition, drive singal changes external conductive object that to judge when being supplied to whole first bus with second frequency to exist and be coupled to ground close to during with touching touch-screen, and drive singal changes and is supplied to whole first bus with first frequency.
In addition, after the close of external conductive object or covering can being judged carrying out the detecting of two-dimensions mutual capacitance type, then continue to carry out the detecting of two-dimensions mutual capacitance type again, skip step 210 and 220, no longer carry out full frame driving detecting, until the two-dimensions mutual capacitance type detecting carried out is not judged the close of external conductive object or covers.
Accordingly, in example of the present invention, provide drive singal when whole first bus simultaneously, the signal obtained according to all second buss is detected to the mutual capacitance coupled signal of all second buss and produces a dimension sensitive information, and judge whether that there is at least one external conductive object be coupled to ground determines whether carrying out the detecting of two-dimensions mutual capacitance type close to touching touch-screen according to a dimension sensitive information, wherein the detecting of two-dimensions mutual capacitance type is when part first bus of described first bus is provided drive singal, the mutual capacitance coupled signal of all second buss is detected.
Please refer to Fig. 3, is the schematic flow sheet judging position according to the full frame result driving detecting and two-dimensions mutual capacitance type to detect proposed according to the second embodiment of the present invention.As indicated in step 310, carry out full frame driving detecting, produce one or two dimension sensitive information.Such as, signal according to the first described bus or the second described bus produces a dimension sensitive information, or produces the one one dimension sensitive information corresponding to the first described bus and the 21 dimension sensitive information corresponding to the second described bus according to the signal of the first described bus and the second described bus.Next, as shown at step 320, judge whether there is the close of at least one external conductive object or cover according to a described dimension sensitive information.If there is no the close or covering of at least one external conductive object, then continue to perform step 310, otherwise as shown in step 330, bus that is close by external conductive object or that cover is judged according to a described dimension sensitive information, and as indicated in step 340, determine at least one mutual capacitance type reconnaissance range according to bus that is close by external conductive object or that cover.Next as shown in step 350, mutual capacitance type detecting is carried out to described mutual capacitance type reconnaissance range, produce two-dimensions sensitive information according to mutual capacitance coupling in all overlapping places in described mutual electric-type reconnaissance range.Such as, the capacitive couplings at the overlapping place outside described mutual capacitance type reconnaissance range is appointed as preset value (as null value), the value detected in conjunction with the capacitive couplings according to described mutual capacitance type reconnaissance range produces two-dimensions sensitive information.Following again, as shown in step 360, judge the position of each external conductive object according to two-dimensions sensitive information.Afterwards, then continue perform step 310.Aforesaid two-dimensions sensitive information also can be incomplete full frame image, only presents the capacitive couplings in mutual capacitance type reconnaissance range, and then judges the position of each external conductive object.
In example of the present invention, be produce a dimension sensitive information according to the signal of the first described bus, and mutual capacitance type reconnaissance range by external conductive object close to or all overlapping place of the first bus that covers.In other words, drive singal is supplied to the first bus that is close by external conductive object or that cover one by one, and when each first bus is provided drive singal, the signal according to the second all buss produces two-dimensions sensitive information.Relative to the full mutual tolerance formula detecting of two-dimensions, the advantage of this example can save the much time.
In another example of the present invention, be produce a dimension sensitive information according to the signal of the second described bus, and mutual capacitance type reconnaissance range by external conductive object close to or all overlapping place of the second bus that covers.In other words, drive singal is supplied to the first described bus one by one, and when each first bus is provided drive singal, the signal according to the second bus that is close by external conductive object or that cover produces two-dimensions sensitive information.Relative to the full mutual tolerance formula detecting of two-dimensions, this example can ignore the noise outside mutual capacitance type reconnaissance range.
In preferable example of the present invention, be respectively described in the first bus produces the one one dimension sensitive information and the 21 dimension sensitive information with the signal of the second described bus, and mutual capacitance type reconnaissance range is close by external conductive object or all overlapping place between the first bus of covering and the second bus.In other words, drive singal is supplied to the first bus that is close by external conductive object or that cover one by one, and when each first bus is provided drive singal, the signal according to the second bus that is close by external conductive object or that cover produces two-dimensions sensitive information.Relative to the full mutual tolerance formula detecting of two-dimensions, the advantage of this example can save the much time, and can ignore the noise outside mutual capacitance type reconnaissance range.
In addition, in example of the present invention, can be judge to exist according to the one one dimension sensitive information at least one external conductive object be coupled to ground close to touching touch-screen, comprising: the first latitude coordinates judging each external conductive object be coupled to ground according to the one one dimension sensitive information; The signal detecting all second buss produces the 21 dimension sensitive information with the signal obtained according to all second buss; The 21 latitude coordinates of each external conductive object be coupled to ground is judged according to the 21 dimension sensitive information; Respectively according to the two-dimensions coordinate that each the one one latitude coordinates difference each the 21 latitude coordinates corresponding is formed; Respectively using the overlapping place of immediate the first described bus of each two-dimensions coordinate and the second bus as corresponding overlapping place; And respectively mutual capacitance type detecting is carried out with the mutual capacitance coupled signal detecting the corresponding overlapping place of each two-dimensions coordinate with the two-dimensions coordinate of the external conductive object judged each and be coupled to ground by detecting overlapping place accordingly to each two-dimensions coordinate.
Drive singal can be to provide to comprising at least one the first buss overlapped on by first bus at the overlapping place detected by the detecting of the mutual capacitance type at the overlapping place that detects for any one, and detecting comprises the signal overlapped on by second bus at the overlapping place detected, to detect the mutual capacitance coupled signal at each overlapping place.Overlapping place wherein on identical first bus is detected when drive singal is provided at least one the first bus comprising and overlapping on by first bus at the overlapping place detected simultaneously.Wherein, the signal of the two-dimensions coordinate of the external conductive object be coupled to ground exceeds threshold limit value.
In another example of the present invention, according to the one one dimension sensitive information and/or the 21 dimension sensitive information judge to exist at least one external conductive object be coupled to ground close to touching touch-screen, comprising: determine mutual capacitance type reconnaissance range according to the one one dimension sensitive information or according to the one one dimension sensitive information and the 21 dimension sensitive information; Carry out mutual capacitance type detecting to described mutual capacitance type reconnaissance range, the mutual capacitance coupled signal according to the overlapping place of all first buss in described mutual capacitance type reconnaissance range and the second bus produces two-dimensions sensitive information; And the position of each external conductive object be coupled to ground is judged according to two-dimensions sensitive information.
Described mutual capacitance type reconnaissance range can be according to the one one dimension sensitive information or the external conductive object of judging to be coupled in ground according to the one one dimension sensitive information and the 21 dimension sensitive information close to or the first bus of touch on all first buss and the second bus overlapping place or be coupled in close or all first buss of touching and the second bus the overlapping place of the external conductive object on ground and decide.Please refer to Fig. 4 A, is the schematic flow sheet judging position according to the full frame result driving detecting and mutual capacitance type to detect proposed according to the third embodiment of the present invention.As indicated at step 410, carry out full frame driving detecting, produce a dimension sensitive information.Next, as shown at step 420, judge whether there is the close of at least one external conductive object or cover according to a described dimension sensitive information.If there is no the close or covering of at least one external conductive object, then continue to perform step 410, otherwise as shown in step 430, judge at least one the one one latitude coordinates according to a described dimension sensitive information.Then, according to shown in step 440, at least one first mutual capacitance type reconnaissance range is determined according to described corresponding at least one bus of the one one latitude coordinates, and according to shown in step 450, mutual capacitance type detecting is carried out to the first described mutual capacitance type reconnaissance range, to judge at least one the 21 latitude coordinates corresponding to each the one one latitude coordinates respectively.Such as, judge two the one one latitude coordinates in step 430, and determine two mutual capacitance type reconnaissance ranges with two articles of buss of the most contiguous two the one one latitude coordinates in step 440, and step 450 carries out mutual capacitance type detecting to produce the dimension sensitive information corresponding to each the one one latitude coordinates, judges at least one the 21 latitude coordinates corresponding to each the one one latitude coordinates further.The one one described latitude coordinates and the 21 latitude coordinates can form two-dimensions coordinate, such as (the one one latitude coordinates, the 21 latitude coordinates) or (the 21 latitude coordinates, the one one latitude coordinates).
Such as, can be when described first bus is provided drive singal simultaneously, the signal detecting all second buss produces the one one dimension sensitive information with the signal obtained according to all second buss.In addition, judge that there is the external conductive object be coupled to ground more comprises close to touching touch-screen according to a dimension sensitive information: judge at least one the one one latitude coordinates according to the one one dimension sensitive information; Determine the first mutual capacitance type reconnaissance range according to each the one one latitude coordinates respectively, and mutual capacitance type detecting is carried out, to produce the 21 dimension sensitive information corresponding to each the one one latitude coordinates to the first described mutual capacitance type reconnaissance range; At least one the 21 latitude coordinates corresponding to each the one one latitude coordinates is produced respectively according to the 21 dimension sensitive information corresponding to each the one one latitude coordinates; And respectively according to each the one one latitude coordinates and accordingly each the 21 latitude coordinates produce two-dimensions coordinate.
Please refer to Fig. 4 B, can be more comprise shown in step 460, at least one second mutual capacitance type reconnaissance range is determined according to the 21 described latitude coordinates, and comprise shown in step 470, mutual capacitance type detecting is carried out, to judge the 31 latitude coordinates corresponding to each the 21 latitude coordinates respectively to the second described mutual capacitance type reconnaissance range.The 21 described latitude coordinates and the 31 latitude coordinates can form two-dimensions coordinate, such as (the 31 latitude coordinates, the 21 latitude coordinates) or (the 21 latitude coordinates, the 31 latitude coordinates).
Such as, can be when described first bus is provided drive singal simultaneously, the signal detecting all second buss produces the one one dimension sensitive information with the signal obtained according to all second buss.In addition, judge to there is the external conductive object be coupled to ground at foundation one dimension sensitive information close with when touching touch-screen, more comprise: judge at least one the one one latitude coordinates according to the one one dimension sensitive information; Determine the first mutual capacitance type reconnaissance range according to each the one one latitude coordinates respectively, and mutual capacitance type detecting is carried out, to produce the 21 dimension sensitive information corresponding to each the one one latitude coordinates to the first described mutual capacitance type reconnaissance range; At least one the 21 latitude coordinates corresponding to each the one one latitude coordinates is produced respectively according to the 21 dimension sensitive information corresponding to each the one one latitude coordinates; Determine the second mutual capacitance type reconnaissance range according to each the 21 latitude coordinates respectively, and mutual capacitance type detecting is carried out, to produce the 31 dimension sensitive information corresponding to each the 21 latitude coordinates to the second described mutual capacitance type reconnaissance range; At least one the 31 latitude coordinates corresponding to each the 21 latitude coordinates is produced respectively according to the 31 dimension sensitive information corresponding to each the 21 latitude coordinates; And respectively according to each the 21 latitude coordinates and accordingly each the 31 latitude coordinates produce two-dimensions coordinate.
In Figure 4 A, the position of one of each the one one latitude coordinates pairing each external conductive object described in the 21 latitude coordinates representative corresponding.In addition, continue to perform step 410 after described external conductive object is judged out.In figure 4b, the position of one of each the 21 latitude coordinates each external conductive object described in the 31 latitude coordinates representative corresponding.In addition, continue to perform step 410 after described external conductive object is judged out.
Please refer to Fig. 4 C, is the schematic flow sheet judging position according to the full frame result driving detecting and mutual capacitance type to detect proposed according to the third embodiment of the present invention.As indicated at step 410, carry out full frame driving detecting, produce two dimension sensitive informations.Next, as shown at step 420, judge whether there is the close of at least one external conductive object or cover according to a described dimension sensitive information.If there is no the close or covering of at least one external conductive object, then continue to perform step 410, otherwise as shown in step 480, according to a described dimension sensitive information, judge all possible two-dimensions coordinate, and determine at least one mutual capacitance type reconnaissance range according to described two-dimensions coordinate, more as shown in step 490, judge the two-dimensions coordinate corresponding to just touching according to described mutual capacitance type reconnaissance range.
Apparently, utilize above-mentioned full frame driving detecting, what no matter whether touch-screen has the ground of not coupled external attaches water stain or other conductive bodies, can judge the external conductive object on the ground whether having coupled external close to touching.Further, judging that the external conductive object on ground of coupled external is close to during with touching, by the detecting of two-dimensions mutual capacitance type can judge external conductive object on the ground of coupled external close to or water stain or other conductive bodies on the ground of touching extraneous not coupled external attach scope.When judging ground water stain of not coupled external or other conductive bodies attach scope, the water stain of the ground of not coupled external or other conductive bodies can not be provided in and attach any coordinate that scope detects, or information or the signal of touch screen surface are cleaned in display, with the interference of pointing out water stain or other conductive bodies on the ground getting rid of not coupled external to attach.
In another example of the present invention, be first carry out the detecting of two-dimensions mutual capacitance type to carry out full frame driving detecting again.The close bus with touching of the full frame external conductive object driving detecting can judge the ground of coupled external, detect with two-dimensions mutual capacitance type the two-dimensions sensitive information comparison produced, the external conductive object that can detect the ground of coupled external close to the bus of touching beyond water stain or other conductive bodies on ground of not coupled external attach scope.
Along with System Operation, external environment condition is changing the impact of touch-screen and interference always, in order to adapt to such change, mode that is regular or irregularly renewal benchmark can be adopted to overcome.Therefore, the renewal of benchmark can be carry out constantly, can be to detect in the process of carrying out in full frame driving detecting and/or mutual capacitance type.
If there is conductive materials to attach on the touchscreen when mutual capacitance type is detected, in two-dimensions sensitive information by present corresponding negative touch or there is just touch around negative touch, if now upgrade benchmark, benchmark will comprise described negatively to touch.Before upper datum renewal once, as long as external conductive object is not positioned at described negative region of touching, the position of external conductive object can by normal detection out.If but conductive materials is wiped out, originally present negative region of touching in benchmark and will present just tactile on two-dimensions sensitive information, cause the mistake in judgement.
By the comparison of the above-mentioned full frame dimension sensitive information driving detecting to produce, exist not corresponding just tactile between two-dimensions sensitive information to a dimension sensitive information, can reflect and there are the problems referred to above, therefore carry out the datum renewal of mutual capacitance type detecting, solve the problem.Such as, two-dimensions sensitive information is carried out a dimensional projections and produce a dimension sensitive information, or the value corresponding to the overlapping place on each second bus is added respectively can produce a dimension sensitive information always.Whether the dimension sensitive information derived by two-dimensions sensitive information can be used to detect the dimension sensitive information produced compare with full frame driving, corresponding just tactile mutually to judge to have, to determine the datum renewal carrying out mutual capacitance type detecting whether in advance.
In addition, only rely on the full mutual tolerance formula detecting of two-dimensions and also can judge whether that conductive materials attaches the possibility at touch-screen.Such as, in two-dimensions sensitive information, only present negative touching and do not present just tactile, or just touching and only appear at negative touching around and do not exist and exceed the just tactile of threshold limit value, can judge that touch-screen may have conductive materials to attach above whereby.In example of the present invention, can be that directly presumption has conductive materials to attach on the touchscreen whereby.In another example of the present invention, full frame driving detecting can be performed in this case in addition and be confirmed whether the close of external conductive object or cover.
In example of the present invention, be do not have external conductive object close to or cover touch-screen time carry out the renewal of benchmark.Such as previously described in, first judge whether that external conductive object is close or cover touch-screen with full frame driving detecting, do not have external conductive object close to or cover touch-screen time carry out the renewal of benchmark, can be comprise the full frame datum renewal driving detecting or/and mutual capacitance type to detect.Again such as, be the two-dimensions sensitive information produced with the detecting of two-dimensions full mutual tolerance formula judge whether to have external conductive object close to or cover touch-screen, do not have external conductive object close to or cover touch-screen time carry out the renewal of benchmark.
Please refer to Fig. 5 A, is a kind of schematic flow sheet upgrading benchmark proposed according to the fourth embodiment of the present invention.Compared to Fig. 2 E, more comprise as shown in step 250, according to a dimension sensitive information judge whether lasting one section of Preset Time judge not exist at least one external conductive object be coupled to ground close to or cover touch-screen.If there is no at least one external conductive object be coupled to ground time that is close or covering touch-screen has not exceeded Preset Time, then as indicated in step 210, proceed full frame driving detecting.Otherwise, if according to a dimension sensitive information judge lasting one section of Preset Time do not exist at least one external conductive object be coupled to ground close to or cover touch-screen time, then as shown in step 260 Yu 270, perform the detecting of two-dimensions mutual capacitance type to obtain two-dimensions sensitive information, to upgrade benchmark according to two-dimensions sensitive information.The step of the renewal benchmark of Fig. 5 A can be performed by aforesaid controller 160.In example of the present invention, upgrading benchmark according to two-dimensions sensitive information is using two-dimensions sensitive information as new benchmark or average as new benchmark using two-dimensions sensitive information and original benchmark.In addition, the position of each external conductive object be coupled to ground be according to the mutual capacitance coupled signal of two-dimensions sensitive information and benchmark between variable quantity judge.
Such as, the arrangement for detecting of a kind of touch-screen proposed according to the present invention, comprising: touch-screen, touch-screen comprises many first buss and many second buss; Controller, controller performs full frame driving detecting, comprising: provide drive singal in whole first bus simultaneously; There is provided drive singal at the same time when whole first bus, the signal obtained according to all second buss is detected to the mutual capacitance coupled signal of all second buss and produces a dimension sensitive information; And according to a dimension sensitive information judge whether to exist at least one external conductive object be coupled to ground close to touching touch-screen; And judge that lasting one section of Preset Time does not exist at least one external conductive object be coupled to ground close to during with touching touch-screen at controller according to a dimension sensitive information, perform the detecting of two-dimensions mutual capacitance type to obtain two-dimensions sensitive information, to upgrade benchmark according to two-dimensions sensitive information, wherein the detecting of two-dimensions mutual capacitance type comprises: the one or more different bus providing drive singal in turn in described first bus; When being provided drive singal respectively at the one or more different bus in described first bus each time, the signal detecting all second buss produces the dimension sensitive information corresponding to the first bus being provided drive singal with the mutual capacitance coupled signal obtained according to all second buss; And gather each corresponding to being provided the dimension sensitive information of the first bus of drive singal to produce two-dimensions sensitive information.
According to a dimension sensitive information judge to exist at least one external conductive object be coupled to ground close to or touching touch-screen time, perform the detecting of two-dimensions mutual capacitance type to obtain two-dimensions sensitive information, to judge the position of each external conductive object be coupled to ground according to two-dimensions sensitive information.
Touch panel device when hand-held device, likely start time grasp hand-held hand just close to or cover on the touchscreen.If carry out datum renewal at this moment, the initial baseline obtained will comprise positive sense of touch measurement information, cause the position at positive sense of touch measurement information place in benchmark cannot react the close of external conductive object or cover, even if caused the finger of the positive sense of touch measurement information of benchmark or palm to remove touch-screen afterwards, still may cause this position cannot react external conductive object close to or cover, such as normally cannot judge close to or cover the position of external conductive object at this position.
Please refer to Fig. 5 B, is a kind of schematic flow sheet upgrading benchmark proposed according to the fifth embodiment of the present invention.The present invention proposes to store master reference in advance, and master reference can be stored in non-volatile memory cells, even if therefore shutdown also can not disappear.First, as shown in step 510 Yu 520, more whether the benchmark IS obtained will mate with master reference DS, if coupling, then as shown in step 530, perform normal operation (computing), otherwise as shown in step 540, relatively whether master reference mates with the sensitive information obtained (a dimension sensitive information or two-dimensions sensitive information), if do not mated, then as shown in step 560, normal operation (computing) is performed, otherwise as shown in step 550, upgrade benchmark.
Under normal circumstances, be do not have external conductive object close to or cover touch-screen or do not have conductive materials to attach touch-screen time carry out the renewal of benchmark, the normal baseline therefore obtained (comprising master reference DS) should be unable to present and just touch or negatively to touch.Suppose that master reference DS is normal, have when benchmark IS upgrades external conductive object close to or cover, by carrying out comparing of master reference DS and benchmark IS when obtaining sensitive information RS afterwards, now can not mate.Therefore compare sensitive information RS and benchmark DS again, if both coupling, represent do not had external conductive object close to or cover touch-screen or do not have conductive materials to attach touch-screen, benchmark IS renewal can be carried out immediately.If both do not mate, benchmark IS cannot be upgraded, can only normal operation be continued.Such as, when starting shooting, hand one vertical compression is according to touch-screen, not only benchmark presents just tactile, sensitive information RS afterwards also presents just tactile, both are identical, even if therefore have hand according to touch-screen, also can not judge that external conductive object is close or press, and then press the existence at the position of the hand pressed when ignoring start, but other parts of touch-screen still can normal operation.Continue pressure once start to remove according to the hand of touch-screen, if other parts do not have the close of external conductive object or cover, in step 540, will judge that sensitive information RS and master reference DS matches, the renewal of benchmark can be carried out.If in step 540, other parts still have the close of external conductive object or cover, then continue normal operation until carry out the renewal of benchmark IS when not having the close of external conductive object or cover again.In addition, if master reference DS is abnormal, then sensitive information RS will not mate with master reference DS, still as shown in step 560, can continue normal operation.
Above-mentioned benchmark goes for self-capacitance detecting, mutual capacitance type detecting or full frame driving detecting.
In addition, the renewal of benchmark can be whole datum renewal, also can be the datum renewal of part.As discussed previously, generation one dimension sensitive information is detected in self-capacitance detecting, full frame drivings, during as benchmark, benchmark be updated to update all.During mutual capacitance type detecting, two-dimensions sensitive information is formed by the dimension sensitive information set corresponding to each first bus (being provided the first bus of drive singal), therefore the renewal of benchmark can be only carry out corresponding part datum renewal for the first single bus, namely only upgrades one of multiple dimension sensitive informations in benchmark.
Touch-screen of the present invention more may be used for transmission information and reception information, that is touch-screen can be used for carrying out condenser type communication (capacitive communication), there is provided drive singal in first bus of, many or whole of touch-screen through above-mentioned controller, the transmission of signal can be provided, and second bus of, many or whole is detected through controller, the reception of signal can be provided, make two touch-screens to carry out unidirectional or two-way communication.
In example of the present invention, touch-screen can be communication Face to face, and namely condenser type communication is carried out across insulation top layer in touch screen panel opposite.Such as, the touch-screen of two handheld apparatus stacks Face to face and carries out condenser type communication.In another example of the present invention, touch-screen can be through human body to carry out condenser type communication.Such as, user touches the touch-screen of hand-hold device on the other hand, and another hand touches the touch-screen of another hand-held device, carries out condenser type communication using human body as the medium of conduction.Again such as, first user and the second user touch the touch-screen of the first hand-held device and the touch-screen of the second hand-held device respectively, as first-hand user and second user's Body contact, the touch-screen of the first hand-held device and the second hand-held device can be made to carry out condenser type communication.The technician of the usual knowledge of this area tool can know by inference, and condenser type communication is not limited to man-to-man communication, can also be the communication carrying out multi-to-multi, and does not show in human body as the medium conducted electricity, and also can be other conducting medium.Such as, two touch-screens can be placed in the pocket of two different people respectively, and when described two people shake hands or touch, two touch-screens just can communicate.
Accordingly, the present invention proposes a kind of means of communication of touch-screen, communicates with the second touch-screen with the first touch-screen.First touch-screen and the second touch-screen have sense mode, detect the close of external conductive object or touching respectively.In addition, the first touch-screen and the second touch-screen have communication pattern, communicate via the capacitive couplings between the first touch-screen with the second touch-screen, to exchange or transmission information.Therefore, communication system is formed by the first touch-screen and the second touch-screen.In example of the present invention, described sense mode and communication pattern can be alternately be performed.In another example of the present invention, can be switched between sense mode and communication pattern by user interface.
Please refer to shown in Fig. 6, for proposing a kind of schematic flow sheet of the means of communication of touch-screen according to sixth embodiment of the invention.As indicated in step 610, the first touch-screen and the second touch-screen are provided.Next as shown in step 620 Yu 630, detect the close of external conductive object respectively at the sense mode of the first touch-screen and the second touch-screen or touch, and communicate via the capacitive couplings between the first touch-screen with the second touch-screen with the communication pattern of the second touch-screen at the first touch-screen, to exchange or to transmit an information.
Such as, the first touch-screen has transparent insulating layer and conductive layer, and information transmits across transparent insulating layer and the second touch-screen capacitive couplings via conductive layer.Relatively, the second touch-screen has transparent insulating layer and conductive layer, and information receives across transparent insulating layer and the first touch-screen capacitive couplings via conductive layer.Wherein, the capacitive couplings between the first touch-screen and the second touch-screen can be that the first touch-screen comes and the second touch-screen capacitive couplings through the capacitive couplings with at least one external conductive object.Such as, first touch-screen and the second touch-screen have many first buss being provided drive singal at sense mode and many second buss providing capacitive couplings signal because of drive singal respectively, in the communication mode, the first touch-screen and the second touch-screen are that the first bus that is close with outside shaping claviform or that touch and/or the second bus communicate.The transmission of signal can be transmit in analog or digital mode, in preferable example of the present invention, signal encodes in a digital manner to send, can be such as two-symbol word string or package, the bit number of single transmission can be fixing can also be variable, it can be such as the balanced code (balanced code) of regular length, BergerCode, also can be there is package head package such as, condenser type communication can be utilize (handshaking) mechanism of shaking hands, touch-screen as transmission ends sends transmission requirement with coded signal or package, touch-screen as receiving end is receiving and is responding acknowledge with signal or package after confirming transmission requirement, the touch-screen of transmission ends just can transmit data to receiving end, the technician of the usual knowledge of this area tool can know other sequence communications protocol by inference.
When two touch screen panel opposites come close to or in contact with, a touch-screen is through providing drive singal in bus, and the signal detecting bus can confirm the existence of another touch-screen, and then carries out condenser type communication.In example of the present invention, can be provide drive singal by the first touch-screen, if the second touch-screen contacts with the first touch-screen or in predeterminable range, the signal of the bus of the first touch-screen be relatively less than the second touch-screen do not contact or in predeterminable range time the signal of bus of the first touch-screen, can be confirmed whether whereby to carry out condenser type communication.Meanwhile, the bus of the second touch-screen also can be subject to the capacitive couplings of the drive singal of the first touch-screen, and the bus through detecting second touch-screen also can be apprised of and can carry out condenser type communication.
In example of the present invention, the controller carrying out condenser type communication has the ability of the bus identifying Received signal strength.Such as, when the Article 1 of the first touch-screen or first group of transmission bus are provided drive singal, the Article 1 of the second touch-screen or first group of reception bus are by capacitive couplings, the controller of the second touch-screen, when detecting the signal of each bus, can be judged by capacitively coupled bus.In this scenario, the second touch-screen can select one or more bus as Article 2 or second group of transmission bus outside described Article 1 or first group of reception bus, and provides drive singal.Similarly, the first touch-screen can detect the capacitively coupled Article 2 of drive singal or second group of reception bus transmitted with the second touch-screen.In other words, the condenser type communication of touch-screen provided by the invention can be single work also can be full duplex.Owing to not necessarily can entirely align when touch-screen is placed Face to face, and the size of the first touch-screen and the second touch-screen or bus number also not necessarily identical, applicable unjustified or size is different or bus number the is different touch-screen of the condenser type communication of touch-screen provided by the invention.
In the communication of touch-screen of the present invention, comprising but not limiting is single work, half versus full-duplex.Capacitive couplings between the first touch-screen with the second touch-screen is that the first touch-screen is coupled with the aspectant direct capacitive of the second touch-screen, wherein the first touch-screen and the aspectant region of the second touch-screen comprise first area and second area, and the first touch-screen and the second touch-screen are through and carry out half-or full-duplex transmission in the capacitive couplings of first area and second area.In example of the present invention, the first touch-screen and the second touch-screen have many buss respectively, and the bus of the first touch-screen in first area and the second touch-screen are not stacked at the bus of second area.
One or more transmit bus and one or more receive bus can be described as a group communication bus corresponding to the second touch-screen of first touch-screen.In other words, the condenser type communication of touch-screen provided by the invention can separate out multigroup communication bus, can provide the communication of multigroup simultaneously, to carry out parallel communication or the communication of multigroup sequence of multidigit unit.In example of the present invention, can be that two groups of communication buss carry out double track (dual-rail) communication, first group of communication bus and second group of communication bus at the same time between only have a group communication bus signal transmission, such as first group of communication bus signal transmission interval scale 1, and second group of communication bus signal transmission interval scale 0, whether confirmation signal is correctly transmitted whereby.
In addition, the first touch-screen can be first detect hand close to or cover the position of touch-screen, the one or more bus signal transmission of drive singal by being covered by conducting medium being provided, compared to full frame driving, much electric power can being saved.Similarly, the second touch-screen also can be first detect conducting medium close to or cover the position of touch-screen, by the one or more bus Received signal strength covered by conducting medium.
The condenser type communication that the technician of the usual knowledge of this area tool can know touch-screen provided by the invention by inference can be used to transmission voice data, image data, lteral data, order or other information, particularly be applicable to mobile phone, panel computer, Trackpad or other there is the device of touch-screen, be not limited to hand-held device.In addition, aforesaid touch-screen is not limited to projection-type capacitive touch screen, also can be surface capacitance touch-screen (surface capacitive touch screen), resistive touch screen (resistive touch screen) etc.Such as, aforementioned the first touch-screen carrying out communicating is surface-type capacitance touch screen, and the second touch-screen is projection-type capacitive touch screen.
Please refer to Fig. 7, carrying out with touch-screen the schematic diagram that communicates for what provide according to the seventh embodiment of the present invention, is optimal mode.At capacitive touch screen while being provided drive singal, there is provided the earthing potential of the first touch-screen 71 at least one bus 73 of the first touch-screen 71, and provide the earthing potential of the second touch-screen 72 at least one bus 74 of the second touch-screen 72, make the bus capacitive couplings being provided earthing potential of the first touch-screen 71 and the second touch-screen 72, thus reduce the first touch-screen and the indirect earthy difference of the second touch-screen.
Such as, the bus towards first direction arrangement of the first touch-screen is provided drive singal, and be provided earthing potential towards the bus of second direction, and the second touch-screen is provided earthing potential towards the bus that first direction arranges, and be used to towards the bus of second direction arrangement the data detecting transmission.Again such as, can be that many continuously arranged buss of the first touch-screen are provided drive singal, other all buss be provided earthing potential, and the second touch-screen is not all provided earthing potential by the bus of detection signal.
In better model of the present invention, the first touch-screen has aforesaid screening conductive bar, and described screening conductive bar is provided earthing potential.
In example of the present invention, in aforesaid step 630, when communication, the first touch-screen and the second touch-screen have respectively and are provided earthing potential at least partially, and the first touch-screen and the second touch-screen are provided the capacitive couplings Face to face at least partially of earthing potential, with the earthing potential furthered between the first touch-screen and the second touch-screen.Capacitive couplings wherein between the first touch-screen with the second touch-screen is that the first touch-screen is coupled with the aspectant direct capacitive of the second touch-screen, wherein the first touch-screen and the aspectant region of the second touch-screen comprise first area and second area, and the first touch-screen and the second touch-screen are through and carry out half-or full-duplex transmission in the capacitive couplings of first area and second area.
In the first example of the present invention, first touch-screen and the second touch-screen have many first buss being provided drive singal at sense mode and many second buss providing capacitive couplings signal because of drive singal respectively, first area is the first bus with what carry out in second area communicating, and the second bus described in sense mode is provided earthing potential.
In the second example of the present invention, first touch-screen and the second touch-screen have many first buss being provided drive singal at sense mode and many second buss providing capacitive couplings signal because of drive singal respectively, first area is the second bus with what carry out in second area communicating, and the first bus described in sense mode is provided earthing potential.
In the 3rd example of the present invention, first touch-screen and the second touch-screen have many first buss being provided drive singal at sense mode and many second buss providing capacitive couplings signal because of drive singal respectively, and the first touch-screen and the aspectant region of the second touch-screen more comprise the 3rd region, first area is the second bus with what carry out in second area communicating, and second bus in the 3rd region is provided earthing potential in sense mode.
In the 4th example of the present invention, first touch-screen and the second touch-screen have many first buss being provided drive singal at sense mode and many second buss providing capacitive couplings signal because of drive singal respectively, wherein in the communication mode, one of described first bus and described second bus are simultaneously provided drive singal, and another of described first bus and described second bus is simultaneously provided ground signalling.
According to above-mentioned, the present invention more proposes a kind of method for detecting of touch-screen, more comprises to perform to upgrade to judge, upgrades benchmark to judge whether once to perform within the scheduled update time.As upgrade judge display exceed the scheduled update time do not perform the renewal of benchmark time, just carry out renewal benchmark.
Please refer to Fig. 8, it is the block flow diagram of the method for detecting of the touch-screen of the embodiment of the present invention.First, as shown in step 800, full frame driving detecting is performed to touch-screen.Subsequently, as shown in step 810, according to full frame drive the detecting result of detecting judge whether to exist at least one external object close to or touching touch-screen.As shown in step 820, when full frame driving detecting display do not exist at least one external object close to or touching touch-screen time, perform to upgrade and judge, upgrade benchmark to judge whether once to perform within the scheduled update time.As shown in step 830, when upgrade judge display this benchmark exceed the scheduled update time do not perform renewal time, benchmark is upgraded according to the first two-dimentional sensitive information, wherein when full frame driving detecting execution exceedes the predetermined detecting time or perform continuously exceed predetermined detecting number of times do not detect yet exist at least one external object close to or touching touch-screen time, full frame driving detecting display do not exist at least one external object close to or touching touch-screen.Finally, after this benchmark of renewal, the full frame driving detecting of repeated execution of steps 800.
When full frame driving detecting display do not exist at least one external object close to or touching touch-screen time, as illustrated in step 840, perform the detecting of two-dimentional mutual capacitance type to obtain the first two-dimentional sensitive information.The renewal benchmark of step 830 is carried out subsequently again according to the first two-dimentional sensitive information.
When the renewal of step 820 judges that this benchmark of display once performed renewal within the scheduled update time, the full frame driving detecting of repeated execution of steps 800.
Moreover, as shown in step 842, when full frame at least one external object of driving detecting display existence is close or when touching touch-screen, perform the detecting of two-dimentional mutual capacitance type to obtain the second two-dimentional sensitive information.Subsequently, then judge the position of at least one external object according to the second two-dimentional sensitive information, as indicated at step 850.After judging the position of at least one external object, the full frame driving detecting of repeated execution of steps 800.
Please refer to shown in Figure 1A, touch-screen 120 comprises many first bus 140A and many second bus 140B, and full frame driving detecting comprises: provide drive singal in whole first bus 140A simultaneously; There is provided drive singal simultaneously when whole first bus 140A, the signal obtained according to all second bus 140B is detected to the mutual capacitance coupled signal of all second bus 140B and produces one dimension sensitive information; And according to this one dimension sensitive information judge whether to exist at least one external object close to or touch this touch-screen 120.
Moreover above-mentioned two-dimentional mutual capacitance type detecting comprises: the one or more different bus providing drive singal in turn in described first bus; When being provided drive singal respectively at the one or more different bus in described first bus each time, the signal detecting all second buss produces the one dimension sensitive information corresponding to the first bus being provided drive singal with the mutual capacitance coupled signal obtained according to all second buss; And gather each corresponding to being provided the one dimension sensitive information of the first bus of drive singal to produce the first two-dimentional sensitive information or the second two-dimentional sensitive information.
Please refer to shown in Figure 1A and Figure 1B, the present invention more proposes a kind of touching system, comprises touch-screen 120 and touching controller (being aforementioned controllers 160).Touching controller 160 performs following operation: perform full frame drivings detecting to touch-screen 120, close or touch this touch-screen 120 to judge whether to exist at least one external object; When full frame driving detecting display do not exist this at least one external object close to or touch this touch-screen 120 time, perform to upgrade and judge, upgrade benchmark to judge whether once to perform within the scheduled update time; And when upgrade judge this benchmark of display exceed the scheduled update time do not perform renewal time, upgrade this benchmark according to the first two-dimentional sensitive information.
Accordingly, the present invention more proposes a touching controller 160, performs following operation: perform full frame driving detecting to touch-screen 120, with judge whether to exist at least one external object close to or touch this touch-screen 120; When full frame driving detecting display do not exist this at least one external object close to or touch this touch-screen 120 time, perform to upgrade and judge, upgrade benchmark to judge whether once to perform within the scheduled update time; And when upgrade judge this benchmark of display exceed the scheduled update time do not perform renewal time, upgrade this benchmark according to the first two-dimentional sensitive information.All the other correlative details have been disclosed in above-mentioned explanation, do not repeat them here.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (21)
1. a method for detecting for touch-screen, is characterized in that it comprises:
Full frame drivings detecting is performed to this touch-screen, close or touch this touch-screen to judge whether to exist at least one external object;
When this full frame driving detecting display do not exist this at least one external object close to or touch this touch-screen time, perform to upgrade and judge, upgrade benchmark to judge whether once to perform within the scheduled update time; And
When this renewal judge this benchmark of display exceed this scheduled update time do not perform renewal time, upgrade this benchmark according to the first two-dimentional sensitive information.
2. method for detecting according to claim 1, it is characterized in that wherein exceeding predetermined detecting number of times when this full frame driving detecting execution exceedes the predetermined detecting time or performs continuously, do not detect yet exist this at least one external object close to or touch this touch-screen time, it is close or touch this touch-screen to there is not this at least one external object in this full frame drivings detecting display.
3. method for detecting according to claim 1, is characterized in that wherein after this benchmark of renewal, repeats this full frame driving detecting.
4. method for detecting according to claim 1, is characterized in that, wherein when this renewal judges that this benchmark of display once performed renewal within this scheduled update time, repeating this full frame driving detecting.
5. method for detecting according to claim 1, is characterized in that it more comprises:
When this full frame driving detecting display exist at least one external object close to or when touching this touch-screen, perform the detecting of two-dimentional mutual capacitance type to obtain the second two-dimentional sensitive information, to judge the position of this at least one external object according to this second two-dimentional sensitive information; And
Repeat this full frame driving detecting.
6. method for detecting according to claim 1, it is characterized in that wherein this touch-screen comprises many first buss and many second buss, and this full frame driving detecting comprises:
There is provided drive singal in whole first bus simultaneously;
There is provided drive singal simultaneously when whole first bus, the mutual capacitance coupled signal of all second buss is detected, the one dimension sensitive information produced with the signal obtained according to all second buss; And
According to this one dimension sensitive information judge whether to exist at least one external object close to or touch this touch-screen.
7. method for detecting according to claim 1, it is characterized in that wherein this touch-screen comprises many first buss and many second buss, and when this full frame driving detecting display do not exist at least one external object close to or touch this touch-screen time, perform the detecting of two-dimentional mutual capacitance type to obtain this first two-dimentional sensitive information, wherein this two-dimentional mutual capacitance type detecting comprises:
Different one or more bus of drive singal in described first bus is provided in turn;
When being provided drive singal respectively at the one or more different bus in described first bus each time, detect the signal of all second buss, with the mutual capacitance coupled signal obtained according to all second buss produce corresponding to the one dimension sensitive information of the first bus being provided drive singal; And
Gather each corresponding to being provided the one dimension sensitive information of the first bus of drive singal to produce this first two-dimentional sensitive information.
8. a touching controller, is characterized in that it performs following operation:
Full frame drivings detecting is performed to touch-screen, close or touch this touch-screen to judge whether to exist at least one external object;
When this full frame driving detecting display do not exist this at least one external object close to or touch this touch-screen time, perform to upgrade and judge, upgrade benchmark to judge whether once to perform within the scheduled update time; And
When this renewal judge this benchmark of display exceed this scheduled update time do not perform renewal time, upgrade this benchmark according to the first two-dimentional sensitive information.
9. touching controller according to claim 8, it is characterized in that wherein exceeding predetermined detecting number of times when this full frame driving detecting execution exceedes the predetermined detecting time or performs continuously, do not detect yet exist this at least one external object close to or touch this touch-screen time, it is close or touch this touch-screen to there is not this at least one external object in this full frame drivings detecting display.
10. touching controller according to claim 8, is characterized in that wherein after this benchmark of renewal, repeats this full frame driving detecting.
11. touching controllers according to claim 8, is characterized in that, wherein when this renewal judges that this benchmark of display once performed renewal within this scheduled update time, repeating this full frame driving detecting.
12. touching controllers according to claim 8, is characterized in that it more performs following operation:
When this full frame driving detecting display exist at least one external object close to or when touching this touch-screen, perform the detecting of two-dimentional mutual capacitance type to obtain the second two-dimentional sensitive information, to judge the position of this at least one external object according to this second two-dimentional sensitive information; And
Repeat this full frame driving detecting.
13. touching controllers according to claim 8, it is characterized in that wherein this touch-screen comprises many first buss and many second buss, and this full frame driving detecting comprise:
There is provided drive singal in whole first bus simultaneously;
There is provided drive singal simultaneously when whole first bus, the signal obtained according to all second buss is detected to the mutual capacitance coupled signal of all second buss and produces one dimension sensitive information; And
According to this one dimension sensitive information judge whether to exist at least one external object close to or touch this touch-screen.
14. touching controllers according to claim 8, it is characterized in that wherein this touch-screen comprises many first buss and many second buss, and when this full frame driving detecting display do not exist at least one external object close to or touch this touch-screen time, perform the detecting of two-dimentional mutual capacitance type to obtain this first two-dimentional sensitive information, wherein this two-dimentional mutual capacitance type detecting comprises:
Different one or more bus of drive singal in described first bus is provided in turn;
When being provided drive singal respectively at the one or more different bus in described first bus each time, the signal detecting all second buss produces the one dimension sensitive information corresponding to the first bus being provided drive singal with the mutual capacitance coupled signal obtained according to all second buss; And
Gather each corresponding to being provided the one dimension sensitive information of the first bus of drive singal to produce this first two-dimentional sensitive information.
15. 1 kinds of touching systems, is characterized in that it comprises:
Touch-screen; And
Touching controller, performs following operation:
Full frame drivings detecting is performed to this touch-screen, close or touch this touch-screen to judge whether to exist at least one external object;
When this full frame driving detecting display do not exist this at least one external object close to or touch this touch-screen time, perform to upgrade and judge, upgrade benchmark to judge whether once to perform within the scheduled update time; And
When this renewal judge this benchmark of display exceed this scheduled update time do not perform renewal time, upgrade this benchmark according to the first two-dimentional sensitive information.
16. touching systems according to claim 15, it is characterized in that wherein exceeding predetermined detecting number of times when this full frame driving detecting execution exceedes the predetermined detecting time or performs continuously, do not detect yet exist this at least one external object close to or touch this touch-screen time, it is close or touch this touch-screen to there is not this at least one external object in this full frame drivings detecting display.
17. touching systems according to claim 15, is characterized in that wherein after this benchmark of renewal, repeat this full frame driving detecting.
18. touching systems according to claim 15, is characterized in that, wherein when this renewal judges that this benchmark of display once performed renewal within this scheduled update time, repeating this full frame driving detecting.
19. touching systems according to claim 15, is characterized in that wherein this touching controller more performs following operation:
When this full frame driving detecting display exist at least one external object close to or when touching this touch-screen, perform the detecting of two-dimentional mutual capacitance type to obtain the second two-dimentional sensitive information, to judge the position of this at least one external object according to this second two-dimentional sensitive information; And
Repeat this full frame driving detecting.
20. touching systems according to claim 15, it is characterized in that wherein this touch-screen comprises many first buss and many second buss, and this full frame driving detecting comprise:
There is provided drive singal in whole first bus simultaneously;
There is provided drive singal simultaneously when whole first bus, the mutual capacitance coupled signal of all second buss is detected to obtain the one dimension sensitive information that the signal according to all second buss produces; And
According to this one dimension sensitive information judge whether to exist at least one external object close to or touch this touch-screen.
21. touching systems according to claim 15, it is characterized in that wherein this touch-screen comprises many first buss and many second buss, and when this full frame driving detecting display do not exist at least one external object close to or touch this touch-screen time, perform the detecting of two-dimentional mutual capacitance type to obtain this first two-dimentional sensitive information, wherein this two-dimentional mutual capacitance type detecting comprises:
Different one or more bus of drive singal in described first bus is provided in turn;
When being provided drive singal respectively at the one or more different bus in described first bus each time, the signal detecting all second buss produces the one dimension sensitive information corresponding to the first bus being provided drive singal with the mutual capacitance coupled signal obtained according to all second buss; And
Gather each corresponding to being provided the one dimension sensitive information of the first bus of drive singal to produce this first two-dimentional sensitive information.
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| TWI617965B (en) | 2018-03-11 |
| TW201525819A (en) | 2015-07-01 |
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