CN105718076B - Active stylus and its method for transmitting signals with touch panel - Google Patents
Active stylus and its method for transmitting signals with touch panel Download PDFInfo
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- CN105718076B CN105718076B CN201410725054.4A CN201410725054A CN105718076B CN 105718076 B CN105718076 B CN 105718076B CN 201410725054 A CN201410725054 A CN 201410725054A CN 105718076 B CN105718076 B CN 105718076B
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Abstract
The present invention discloses a kind of active stylus and its method for transmitting signals with touch panel, and active stylus includes touch-control module, switching module, signal comparison module, control module and pressure sensing module.The method for transmitting signals of active stylus and touch panel comprises the steps of.The first signal generated with stylus detection touch panel.Stylus compares the intensity and reference value of the first signal via the first transmission path.When the intensity of the first signal is greater than reference value, stylus exports second signal to touch panel.After stylus exports second signal to touch panel, stylus is coupled to the second transmission path from the switching of the first transmission path.Stylus exports header signal to touch panel.When stylus detects the first timing distribution, output pressure signal, and according to an at least bit in the second timing distribution output pressure signal to touch panel.
Description
Technical field
The present invention relates to a kind of active stylus and its with the method for transmitting signals of touch panel, in particular to a kind of tool
There is an active stylus of pressure-sensing, and using the active pressure-sensing for touching pen track to be set on touch panel wide
The method for transmitting signals of angle value.
Background technique
As touch panel is using more and more extensive, touch panel has different touchings also because of different use demands
Prosecutor formula.In a variety of touch panels, wherein having with capacitance type touch-control panel, light transmittance is good, hardness is high, the reaction time is fast
And the characteristic of high sensitivity, also so that capacitance type touch-control panel is widely used in the technical field of touch-control.
Two kinds can be generally divided into control the pattern of capacitance type touch-control panel at present, such as active touch-control and passive type
Touch-control.The input mode and device of passive type touch-control are comprising being touched with finger point with the touching of passive type stylus point, and active touching
The input unit of control is then such as with the touching of active stylus point.In comparison with passive type stylus, active stylus is actively defeated
Signal responds the technical approach of capacitance type touch-control panel out, so that active stylus can carry out more on capacitance type touch-control panel
Good fine operation, such as write and paint etc..
Although having no however, existing active stylus can provide finer operation and providing pressure-sensing
Technology can enable capacitance type touch-control panel different according to the pressure of user's pen, the track of explicit different thicknesses.In view of
This, it is really necessary to invent a kind of active stylus with pressure sensing technologies and such active stylus and capacitor
The signal transmission form of formula touch panel can use a pressure difference according to user to reach capacitance type touch-control panel, and show
Show the person's handwriting of different thicknesses, so that the effect more adjunction that active stylus is drawn and write on capacitance type touch-control panel
Nearly true style of writing.
Summary of the invention
The active stylus that the purpose of the present invention is to provide a kind of with pressure sensing technologies and such active
Method for transmitting signals between stylus and touch panel.Touch panel is responded by active stylus, produces touch panel
It is raw to correlate in the coordinate position of active Pointer contacts touch panel, then by the pressure-sensing skill inside active pointers
Art sets track width value for touch panel accordingly, can use pressure according to user to reach touch panel, show different thick
The effect of thin track.
In order to achieve the above object, it includes that touch-control module, switching module, signal compare that the present invention, which provides a kind of active stylus,
Module, control module and pressure sensing module, the first signal that wherein touch-control module is generated to detect touch panel.Switch mould
Block is electrically connected touch-control module, and is selectively coupled to the first transmission path or the second transmission path, to select touch-control module
The first signal detected, via the first transmission path or the second transmission path.Signal comparison module is via first
Transmission path receives the first signal that touch-control module detects, to compare the intensity and reference value of the first signal.When the first letter
Number intensity be greater than the reference value when, signal comparison module export second signal.After signal comparison module exports second signal,
Switching module is coupled to the second transmission path from the switching of the first transmission path, when ignoring signal comparison module output second signal
Generated feedback signal.Control module is electrically connected at touch-control module, to export header signal to touch panel.Header letter
It number is to recognize active stylus to provide touch panel.And pressure sensing module is then to according to first in the first signal
Timing distribution, coding pressure difference value are pressure signal, and according to the second timing distribution in the first signal, in output pressure signal
At least one bit.
The method for transmitting signals that the present invention provides a kind of active stylus has follow steps.Firstly, active touch-control
Pen, which is first detected, compares the intensity and ginseng of the first signal then via the first transmission path by the first signal that touch panel generates
Examine value.When the intensity of the first signal is greater than reference value, second signal is exported to touch panel.When active stylus output the
After binary signal is to touch panel, active stylus is coupled to the second transmission path from the switching of the first transmission path, defeated to ignore
The feedback signal generated when second signal out.Then, active stylus is exported again to provide the active stylus of identification
Header signal is to touch panel.When active stylus detects the first timing distribution from the first signal, pressure difference is encoded
Value is the pressure signal with multiple bits.When active stylus detects the second timing distribution from the first signal, according to
According to the second timing distribution in the first signal, an at least bit is to touch panel in output pressure signal.
A kind of method for transmitting signals of touch panel of the present invention has follow steps.Firstly, the first letter of touch panel output
Number, when active stylus responds the first signal and exports second signal, touch panel is exported according to active stylus
Second signal generates a coordinate position.Coordinate position is correlated in the position of active stylus and touch panel contact point, or
It correlates and receives the position of second signal in touch panel.Then, touch panel detects the header letter of active stylus output
Number, to recognize active stylus indicated by header signal, confirm that the device contacted with touch panel is active stylus,
To generate communications protocol with active stylus.Then, header signal is responded, output meets the first letter of the first timing distribution
Number, to require active stylus to give pressure signal, then output meets the first signal of the second timing distribution, is come with receiving
From in the pressure signal of active stylus, wherein active stylus responds the first signal for meeting the second timing distribution, with
At least one bit in output pressure signal.Whether the pressure signal that has received of touch panel judgement is correct, when having received
When the pressure signal arrived is correct, correspond to the track width value of pressure signal in coordinate position setting.
In conclusion the present invention provides a kind of active stylus with pressure sensing technologies and such active
Method for transmitting signals between stylus and touch panel.Firstly, touch panel is actively responded by active stylus, so that
Touch panel senses the coordinate position of active Pointer contacts.Then, touch panel and active stylus generate communication
Connection makes the active stylus of device of touch panel confirmation contact.Later, the letter that touch panel is distributed again with specific time sequence
Number, it is desirable that the signal of active stylus output pressure sensing makes the track width value of touch panel setting contact position, to reach
Show the effect of different thicknesses track with pressure according to user to touch panel.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Detailed description of the invention
Fig. 1 is the block diagram for the active stylus drawn according to one embodiment of the invention；
Fig. 2 is the block diagram for the active stylus drawn according to another embodiment of the present invention；
Fig. 3 is the block diagram for the active stylus drawn according to yet another embodiment of the invention；
Fig. 4 is the flow chart for the active stylus method for transmitting signals drawn according to one embodiment of the invention；
Fig. 5 for the touch panel method for transmitting signals drawn according to one embodiment of the invention flow chart.
Wherein, appended drawing reference
10 active styluses
11 touch-control modules
13 switching modules
15 signal comparison modules
17 control modules
19 pressure sensing modules
30 active styluses
31 touch-control modules
33 switching modules
35 signal comparison modules
37 control modules
371 boost modules
38 signal amplification modules
39 pressure sensing modules
391 capacitive pressure sensing modules
393 frequency counting modules
395 resistive pressure sensing modules
397 analog-digital converters
Specific embodiment
The detailed features and advantage of the narration present invention in detail in embodiments below, content are enough to make any to be familiar with
Relevant art understands technology contents of the invention and implements accordingly, and according to content disclosed by this specification, claim
Range and attached drawing, it is any to be familiar with relevant art and be readily understood upon the relevant purpose of the present invention and advantage.Embodiment below
It is the viewpoint that present invention be described in more detail, but non-anyways to limit scope of the invention.
Fig. 1 is please referred to, Fig. 1 is the block diagram for the active stylus drawn according to one embodiment of the invention, such as Fig. 1 institute
Show, a kind of active stylus 10 of the present invention has touch-control module 11, switching module 13, signal comparison module 15, control module
17 and pressure sensing module 19, wherein first signal of the touch-control module 11 to detect touch panel generation.Touch-control module 11
It such as can be the nib or pen tip of active stylus 10, mainly use such as rubber of conductive sponge, surface applying conductive paint, lead
Electric silica gel, conductive fiber or other conductive materials are made, to detect first signal on touch panel surface.First signal can be with
Be touch panel be powered when, in surface formed signal, such as capacitance type touch-control panel be powered when, to capacitance type touch-control panel
The signal that interior capacitor charges.For in practice, capacitance type touch-control panel after powered up, can be in order to capacitive touch
Capacitor in control panel charges.When capacitance type touch-control panel contacts the capacitor of (or close) to its inside with touch-control module 11
When charging, the signal that touch-control module 11 will receive capacitance type touch-control panel and charge for its internal capacitance is considered as touch-control mould
Block 11 detects the first signal.Touch-control module 11 can be according to the first letter at a distance from touch panel, detecting varying strength
Number.
Switching module 13 is electrically connected touch-control module 11, and is selectively coupled to the first transmission path or the second transmission road
Diameter, to select the first signal for detecting touch-control module 11, via the first transmission path or the second transmission path.Switching
Module 13 can be a switch element, multiplexer or other can be to switch the element of coupling, input terminal is coupled to touching
Control module 11, the first signal detected to receive touch-control module 11, and output end is then selective is coupled to the first transmission
Path or the second transmission path.For example, the first transmission path can be to be transmitted to signal comparison module for the first signal
15, and when the second transmission path can be to transmit active 10 output signal of stylus generated feedback signal.
Signal comparison module 15 can receive the first signal that detect of touch-control module 11 via the first transmission path, to than
Compared with the intensity and reference value of the first signal.When the intensity of the first signal is greater than the reference value, indicate active stylus 10 with
Touch panel has contacted, or both the distance between sufficiently closed to generate display person's handwriting.At this point, signal comparison module 15 will
Second signal is exported to touch panel, touch panel is made to generate a coordinate position.Second signal can be the anti-of the first signal
To signal, for example, when the signal that the first signal charges for touch panel internal capacitance, then second signal is by active touching
Control the signal that pen 10 issues interference touch panel internal capacitance charging, the signal for such as allowing touch panel internal capacitance to be discharged.Actively
Formula stylus 10 issues the second signal with the first signal inversion, so that touch panel detects the change of its internal capacitance voltage
Change, and obtains the position that active stylus 10 is contacted with touch panel.Coordinate position connection receives second in touch panel
The position of signal also can be considered the point that active stylus 10 is contacted with touch panel.When signal comparison module 15 exports second
After signal, switching module 13 will switch from the first transmission path is coupled to the second transmission path, to ignore signal comparison module 15
Export generated feedback signal when second signal.
In one embodiment of the invention, switching module 13 has preset switching frequency or switching time, in other words, when
After switching module 13 is coupled to the second transmission path from the switching of the first transmission path, by one section of preset switching time, switching
Module 13 will switch from the second transmission path is coupled to the first transmission path.Or be, when switching module 13 is cut with preset
It changes frequency, after control switching module is coupled to the second transmission path from the switching of the first transmission path, then cuts from the second transmission path
Gain the first transmission path.
Control module 17 is electrically connected at touch-control module 11, to export header signal to touch panel.Header signal system
Active stylus 10 is recognized to provide touch panel.For example, header signal can indicate active stylus 10
Identity authentication.When active stylus 10 is near to or in contact with to touch panel, active stylus 10 is by active transmission header
Signal is to touch panel, identity authentication as touch panel according to active stylus 10 indicated by header signal, confirmation with
The device of touch panel contact is active stylus 10, rather than finger or passive type stylus, to correspond to actively
The operation mode of formula stylus 10.Active stylus 10 sends header signal can be in active touching to the movement of touch panel
Control pen 10 executes again after exporting second signal, can also be when active stylus 10 is close to touch panel (in active touching
When control pen starts to detect the first signal) it is carried out, the present invention is without restriction.Active stylus 10 exports header signal to touching
Panel is controlled, the movement of active 10 identity authentication of stylus is confirmed by touch panel, can be considered active stylus 10 and touch-control
Panel generates the communications protocol handed over and hold (Hand Shaking), generates the communication handed over and held with touch panel in active stylus 10
After agreement, touch panel confirms the status of active stylus 10, can export and require signal, it is desirable that active stylus 10
Pressure signal is given, for touch panel in setting track width value on the coordinate position of contact.
Pressure sensing module 19 is to encode pressure difference value as pressure letter according to the first timing distribution in the first signal
Number, and at least one bit according to the second timing distribution in the first signal, in output pressure signal.For example, pressure
Sensing module 19 can be coupled to touch-control module 11, to sense the pressure difference value of the generation of touch-control module 11, and detect touch surface
Whether the first signal of plate output there is the first timing distribution.For by taking square wave as an example, the first timing distribution can be multiple companies
Continuous square wave, and pressure sensing module 19 can calculate the number of square-wave pulse rising when receiving multiple continuous square waves
Whether meet reference number of times, judges whether the first signal received occurs meeting the first timing distribution accordingly.Work as pressure-sensing
When signal judges that the pulse rise times of the first signal meet reference number of times, it is considered as and detects the first timing point from the first signal
Cloth, at this point, it is pressure signal that pressure sensing module 19, which encodes pressure difference value,.
After pressure difference value is encoded to pressure signal by pressure sensing module 19, pressure sensing module 19 will test touch surface
Whether the first signal of plate output there is the second timing distribution, and according to the letter that in the second timing distribution, each pulse rises
Number, at least one bit in difference output pressure signal.Continue for by taking square wave as an example, is encoded when pressure sensing module 19
When pressure signal is the signal of 7 bits, touch panel can export 7 square waves as the second timing distribution, and pressure-sensing
Module 19 then can be when each square-wave pulse of the second timing distribution rises, and a bit of output pressure signal is to touch surface
Plate.
Pressure sensing module 19 other than encoding pressure signal, can also by the header signal of active stylus 10 with
Pressure signal merges coding together, is transmitted further to touch panel.When touch panel is received comprising header signal and pressure signal
Information when, touch panel can according to hand over hold communications protocol when the header signal that receives, judge that active stylus passes
Whether the pressure signal sent is correct.Accordingly, when thering is finger and active stylus 10 to be contacted on touch panel simultaneously, touch-control
Panel may determine that the device system of contact is finger or active stylus 10, thus the seat in active 10 contact point of stylus
The track width value of setting display track in cursor position.
In embodiment shown in FIG. 1, control module 17 can also be coupled to signal comparison module 15 and pressure sensing module
19, the pressure signal that second signal and pressure sensing module 19 to receive the output of signal comparison module 15 export, by controlling
Molding block 17 exports second signal and pressure signal respectively to touch-control module 11.However, in another embodiment, signal ratio
It can be also coupled directly to touch-control module 11 compared with module 15 and pressure sensing module 19, directly to export second signal and pressure signal
To touch-control module 11, the present invention limits not to this.
In embodiment shown in FIG. 1, above-mentioned pressure sensing module 19 recognizes in the first signal the first timing whether occur
Distribution and the movement of the second timing distribution, can also be executed by control module 17, and by control module 17 by the result of judgement
It exports to pressure sensing module 19, controls pressure sensing module 19 accordingly and encode pressure difference value and output pressure signal.
Referring to figure 2. and Fig. 3, Fig. 2 are the block diagram for the active stylus drawn according to another embodiment of the present invention,
Fig. 3 is the block diagram for the active stylus drawn according to yet another embodiment of the invention, as shown, active stylus 30
With touch-control module 31, switching module 33, signal comparison module 35, control module 37, signal amplification module 38, pressure-sensing mould
Block 39, wherein touch-control module 11 shown in touch-control module 31, switching module 33 and signal comparison module 35 and the 1st figure, switching mould
Block 13 and signal comparison module 15 are substantially the same, and in this, it will not go into details.
Embodiment shown in Fig. 2 with embodiment is discrepant shown in the 1st figure is that embodiment shown in Fig. 2 further includes letter
Number amplification module 38.Signal amplification module 38 is coupled between touch-control module 31 and switching module 33, to amplify touch-control module
First signal detected by 31, and amplified first signal is exported to switching module 33.Signal amplifier 38 for example may be used
To receive the first signal from input terminal Vin, and will the first signal amplification or after being converted into the signal of impulse form, then from defeated
Outlet Vout is exported to switching module.
In this embodiment, control module 37 further includes boost module 371, and boost module 371 is coupled to touch-control module 31,
To control module 37 will be transmitted to the signal of touch-control module 31 or voltage promoted after exported again to touch-control module 31.It mentions
The mode for rising signal can be the amplitude for increasing signal or convert a signal into pulse, and promote the size of pulse.Citing comes
It says, after signal comparison module 35 compares the intensity and reference value of the first signal, output second signal to control module 37.Control
After module 37 can promote second signal using boost module 371, then second signal exported to touch-control module 31.Signal compares mould
Block 35 compares the intensity of the first signal and the mode of reference value, can be the size for comparing the amplitude of the first signal, the first signal
Voltage value or maximum wave crest among maximum wave crest and minimum wave crest can compare with the voltage difference of minimum wave crest or other
The mode of first signal strength, the present invention are without restriction.
In embodiment shown in Fig. 2, pressure sensing module 39 may include capacitive pressure sensing module 391 and frequency
Counting module 393.Capacitive pressure sensing module 391 is the touch-control module 31 that capacitance variations are generated with credit union, to sense touching
Capacitance change caused by control module 31 is write or draws because of user, and capacitor per second is calculated by frequency counting module 393
Variable quantity, calculate the pressure size of pen when user writes or draws accordingly, and frequency counting module 393 calculated
To pressure size conversion and be encoded to pressure signal, export to control module 37.
Separately in embodiment shown in Fig. 3, pressure sensing module 39 can also be resistive pressure sensing module 395 and mould
The combination of quasi- digital quantizer 397.Resistive pressure sensing module 395 can be electric bridge composed by variable resistance, to feel
Voltage variety caused by survey touch-control module 31 is write or draws because of user, and pass through analog-digital converter 397 for voltage
Variable quantity is converted to pressure difference value, is calculated accordingly using the pressure signal corresponding to pressure.For example, resistance-type pressure
Power sensing module 395 presets every g of voltage variety for corresponding to 0.05 volt (Volt, V) with pressure, when user makes
When with 10 g of use pressure, resistive pressure sensing module 395 and digital analog converter 397 will calculate corresponding
0.5V voltage variety.It is for 3V with maximum voltage variety, the ratio of 0.5V and 3V are about 0.167, then corresponding pressure
Force signal will indicate that touch panel set track width value as maximum 0.167 times of track width.
Referring to figure 4., Fig. 4 is the stream for the active stylus method for transmitting signals drawn according to one embodiment of the invention
Cheng Tu, as shown in figure 4, active stylus first detects the first signal generated by touch panel in step S501.It is active
The first signal strength size that stylus detects, connection is in active stylus at a distance from touch panel.When active touching
Control pen is closer at a distance from touch panel, and the first signal detected by active stylus is bigger.
Then, in step S503, the active stylus compares the intensity of the first signal via the first transmission path
With reference value.In one embodiment, the active stylus can further the first signal for arriving of amplification detection, then compare
The intensity and reference value of first signal.In this step, the intensity and also can be considered for reference value for comparing the first signal detect master
Dynamic formula stylus is at a distance from touch panel, so that active stylus sufficiently closes at a distance from touch panel, or
When contact, active stylus and touch panel is just made to generate the transmission of signal.
When the intensity of the first signal is greater than reference value, it is enough at a distance from touch panel to be considered as active stylus
It is close, therefore in step S505, second signal is exported to touch panel, for touch panel according to the position for receiving second signal
Generate the coordinate position of contact point.However, being considered as active stylus and touching when the intensity of the first signal is not more than reference value
The distance for controlling panel is not close enough, therefore in step S507, ignore the first signal detected.
After active stylus exports second signal to touch panel, in step S509, active stylus is from
The switching of one transmission path is coupled to the second transmission path, to ignore the feedback signal generated when output second signal.For convenience
Illustrate the purpose of the present embodiment step S509, lifts counter-example hereby to illustrate.Assuming that active not set second transmission path of stylus
Come ignore output second signal generate feedback signal when, the signal amplification module or signal comparison module of active stylus
Feedback signal will be will receive, and the feedback signal received is amplified again or compared as signal provided by touch panel
Then feedback signal exports the once second signal as caused by feedback signal again, and obtain the another of output second signal generation
A feedback signal causes the signal that can not stop to export.Therefore, the present invention, will be from the first transmission road when exporting second signal
Diameter switching is coupled to the second transmission path, to achieve the effect that ignore or filter out feedback signal.
Then, in step S511, active stylus is exported again to provide the header letter for recognizing active stylus
Number give touch panel.As previously mentioned, the status that header signal recognizes active stylus to provide touch panel, in this step
In S511, it can be considered that active stylus and touch panel generate the communications protocol handed over and held, execute touch panel for master
The mode of dynamic formula stylus operation.In other words, when active stylus exports header signal to touch panel, touch panel can
To confirm that the device of contact is active stylus, rather than the finger of passive type stylus or user, it provides accordingly actively
The track width value of formula stylus setting contact point coordinate position.
Next, when active stylus detects the first timing distribution from the first signal, being compiled in step S513
Code pressure difference value is the pressure signal with multiple bits.For example, the first timing distribution, which can be, meets reference number of times
Multiple pulses rise.With reference number of times be three times for, when active stylus detect three subpulses rise signal when, formula
The first timing distribution is detected from the first signal for active stylus, then encoding pressure difference value is the pressure with multiple bits
Force signal.When pressure difference value referred to user uses active stylus with user when active stylus is not used,
The pressure difference value of active stylus nib.It in other words, can be by active touch-control when active stylus is not used in user
The design of pressure of pen nib is pressure base value, when user in writing on touch panel or is painted using active stylus
When, it is then pressure difference value that the pressure value of active stylus nib, which subtracts pressure base value,.And pressure difference value is encoded in addition to actively
Formula stylus encodes outside pressure difference value with the common coding mode of touch panel, can also simultaneously believe header signal or header
The status of active stylus is encoded in pressure signal together in number.
In step S515, when active stylus detects the second timing distribution from the first signal, according to first
The second timing distribution in signal, an at least bit is to touch panel in output pressure signal.For example, the second timing distribution
Can with when multiple pulses signal, the active stylus will test multiple pulses in the second timing distribution, according to second
The signal that each pulse rises in timing distribution distinguishes a bit in output pressure signal.In other words, work as pressure signal
For seven bits signal when, the second timing distribution will be seven pulses, the active stylus will be in the second timing distribution
When each pulse rises, a bit is exported.
Referring to figure 5., Fig. 5 for the touch panel method for transmitting signals drawn according to one embodiment of the invention process
Figure, as shown in figure 5, touch panel exports the first signal in step S701.By taking capacitance type touch-control panel as an example, the first signal
When can be touch panel and being powered, electric field caused by surface electrode, to sense active stylus, passive type stylus or
Capacitance change caused by user's finger.
When active stylus responds the first signal and exports second signal, in step S703, touch panel foundation
The second signal of active stylus output, generates a coordinate position.Coordinate position is correlated in active stylus and touch-control
The position of plate contact point, or connection receive the position of second signal in touch panel.
Then, in step S705, touch panel detects the header signal of active stylus output, to recognize header letter
Active stylus indicated by number confirms that the device contacted with touch panel is active stylus, thus with active touching
Control pen generates the communications protocol handed over and held.In this embodiment, when touch panel and active stylus generate and the communication held handed over to assist
After fixed, touch panel will execute cooperation to the operation mode of active stylus operation control.Touch panel can be with hardware, solid
Part, application program or other feasible modes cooperate the active stylus to operate.
Then, in step S707, header signal is responded, touch panel output meets the first letter of the first timing distribution
Number, to require active stylus to give pressure signal.Meet the first of the first timing distribution when active stylus detects
When signal, the pressure signal that pressure difference value is multiple bits will be encoded.Then, in step S709, touch panel output meets
First signal of the second timing distribution gives active stylus, to receive from active stylus in step S711
Pressure signal.For touch panel output square-wave signal, when touch panel exports a square wave, active stylus will be examined
The square-wave signal of touch panel output is measured, just the signal according to the rising of each square wave, at least one in output pressure signal
A bit.And touch panel receives at least one bit in pressure signal, until receiving then in one square wave of every output
All bits of pressure signal.
In step S713, touch panel judges the whether correct of the pressure signal having received.With pressure signal for seven
For a bit, wherein four bits can be inspection bit for the data bit element of instruction pressure difference value, the other three bit.
Whether after touch panel exports seven square waves, touch panel will decode pressure signal, and check and examine bit correct, work as inspection
When bit is correct, judge that the pressure signal having received is correct.
When the pressure signal having received is correct, in step S717, in touch panel and active Pointer contacts
The coordinate position setting of point corresponds to the track width value of pressure signal.However, when the pressure signal having received is incorrect,
In step S719, track width value is set according to the preceding pressure signal once received.
In other embodiments of the invention, touch panel is in addition to generating the communications protocol handed over and held with active stylus
Afterwards, it can actively execute other than the operation mode for cooperating active stylus, user directly can also require touch panel to hold
Row cooperates the operation mode of active stylus, for example, user execute drawing application program, notes application program or other can
Capable application program etc., enables active stylus in drawing application program, by the pressure of user's pen, with setting
On touch panel, the track width value of contact point coordinate position.
In summary, the present invention responds the first signal of touch panel by active stylus, to generate second
Signal makes touch panel sensing generate a coordinate position.Then, header signal is exported by active stylus, with touch surface
Plate generates communication connection, and the device for touch panel confirmation contact is active stylus.Later, touch panel is again to export symbol
Close the first signal of the first timing distribution, it is desirable that active stylus output pressure signal is to touch panel, to provide touch surface
Plate sets the track width value of contact position accordingly, reaches the use pressure that touch panel can be different according to user, thus aobvious
Show the track of different thicknesses.
Certainly, the invention may also have other embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding changes and modifications, but these corresponding changes and change in accordance with the present invention
Shape all should fall within the scope of protection of the appended claims of the present invention.
Claims (10)
1. a kind of active stylus, characterized by comprising:
One touch-control module, to detect one first signal；
One switching module is electrically connected the touch-control module, and selectively couples one first transmission path or one second transmission path；
One signal comparison module compares the intensity and a reference value of first signal via first transmission path, and in this
When the intensity of one signal is greater than the reference value, a second signal is exported, wherein when the signal comparison module exports the second signal
Afterwards, which is coupled to second transmission path from first transmission path switching, to ignore via the first transmission road
Diameter exports the feedback signal generated when the second signal；
One control module is electrically connected at the touch-control module and the signal comparison module, to export a header signal, the header
Signal recognizes the active stylus to provide；And
One pressure sensing module encodes a pressure difference value according to one first timing distribution in first signal as pressure letter
Number, and according to one second timing distribution in first signal, export an at least bit in the pressure signal.
2. active stylus according to claim 1, which is characterized in that when the switching module is from first transmission path
After switching is coupled to second transmission path, by a preset time, which switches coupling from from second transmission path
It is connected to first transmission path.
3. active stylus according to claim 1, which is characterized in that the control module is more to judge first letter
Whether the number that multiple pulses rise in number meets a reference number of times, and when the number symbol that those pulses rise in first signal
When closing the reference number of times, controlling the pressure sensing module and encoding the pressure difference value is the pressure signal.
4. active stylus according to claim 3, which is characterized in that the control module more to detect this second when
Sequence distribution in multiple pulses, and according in second timing distribution each pulse rise when, control the pressure-sensing mould
Block exports at least bit in the pressure signal.
5. a kind of method for transmitting signals of active stylus, characterized by comprising:
Detect one first signal；
Via one first transmission path, compare the intensity and a reference value of first signal；
When the intensity of first signal is greater than the reference value, a second signal is exported；
Be coupled to one second transmission path from first transmission path switching, with ignore via first transmission path export this
The feedback signal generated when binary signal；
A header signal is exported, which recognizes the active stylus to provide；
When detecting first timing distribution from first signal, one pressure difference value of coding is a pressure signal；And
According to one second timing distribution in first signal, an at least bit in the pressure signal is exported.
6. the method for transmitting signals of active stylus according to claim 5, which is characterized in that Yu Dangcong first letter
When detecting first timing distribution in number, encodes in the step of pressure difference value is the pressure signal, includes:
Whether the number for judging that multiple pulses rise in first signal meets a reference number of times；And
When the number that those pulses rise in first signal meets the reference number of times, it is considered as and is detected from first signal
First timing distribution, then encoding the pressure difference value is the pressure signal.
7. the method for transmitting signals of active stylus according to claim 5, which is characterized in that according to first letter
Second timing distribution in number includes in the step of exporting at least bit of this in the pressure signal:
Detect multiple pulses in second timing distribution；And
When rising according to each pulse in second timing distribution, at least bit in the pressure signal is exported.
8. a kind of method for transmitting signals of touch panel, characterized by comprising:
Export one first signal；
According to a second signal, a coordinate position is generated, wherein intensity of the active stylus according to first signal, via
One first transmission path exports the second signal, and switches to generation when one second transmission path exports the second signal to ignore
A feedback signal；
A header signal is detected, which indicates the active stylus；
The header signal is responded, output meets first signal of one first timing distribution；
Output meets first signal of one second timing distribution；
Receive the pressure signal generated from the active stylus, wherein active stylus response meet this second when
First signal of sequence distribution, to export at least bit in the pressure signal；
Judge whether the pressure signal having received is correct；And
When the pressure signal having received is correct, correspond to a track width of the pressure signal in coordinate position setting
Value.
9. the method for transmitting signals of touch panel according to claim 8, which is characterized in that export multiple pulses risings time
Number meets first signal of a reference number of times, is considered as first signal that output meets first timing distribution.
10. the method for transmitting signals of touch panel according to claim 8, which is characterized in that in second timing distribution
Each pulse rise when, receive an at least bit for the pressure signal.
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| JP6280297B1 (en) * | 2016-07-01 | 2018-02-14 | 株式会社ワコム | Method implemented by stylus, method implemented by dual stylus and dual controller, and dual stylus |
| CN107861651B (en) * | 2016-09-22 | 2021-01-22 | 京东方科技集团股份有限公司 | Touch method, active pen, touch screen and touch display system |
| TWI656470B (en) * | 2017-05-16 | 2019-04-11 | 矽統科技股份有限公司 | Touch display system, touch display method, active pen, and touch control device |
| CN112689815A (en) * | 2018-10-12 | 2021-04-20 | 深圳市柔宇科技股份有限公司 | Stylus and input device |
| JP7319297B2 (en) * | 2018-12-25 | 2023-08-01 | 株式会社ワコム | input system |
| CN112764560A (en) * | 2021-01-22 | 2021-05-07 | 昆山龙腾光电股份有限公司 | Active stylus and control method |
| CN114237425B (en) * | 2021-12-21 | 2024-01-16 | 深圳市普锐高科实业有限公司 | Screen controllable method based on handwriting pen |
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