CN108205381A - Active stylus - Google Patents
Active stylus Download PDFInfo
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- CN108205381A CN108205381A CN201611169300.8A CN201611169300A CN108205381A CN 108205381 A CN108205381 A CN 108205381A CN 201611169300 A CN201611169300 A CN 201611169300A CN 108205381 A CN108205381 A CN 108205381A
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- external pressure
- frequency
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- threshold value
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electronic Switches (AREA)
- User Interface Of Digital Computer (AREA)
Abstract
A kind of active stylus includes pressing element and pressure sensing module；The one end for pressing element is set to the pen tip portion of the active stylus, and to receive external pressure；Pressure sensing module connection presses element, pressure sensing module is generating oscillator signal, when pressing element reception external pressure and external pressure is less than the first threshold value, oscillator signal is shaken with first frequency, when pressing element reception external pressure and external pressure reaches the first threshold value, the concussion frequency of oscillator signal is adjusted to second frequency, and the difference between first frequency and second frequency is more than the second threshold value.Active stylus provided by the present invention, by means of the threshold value for setting external pressure, make whether active stylus can reach threshold value according to external pressure, oscillator signal is generated with different first frequencies and second frequency respectively, so as to make active stylus can be to avoid because active stylus is made to generate the situation of wrong report point or leak during the noise disturbance of external environment.
Description
Technical field
The present invention relates to a kind of stylus more particularly to a kind of active touch-controls for frequency disturbance caused by noise
Pen.
Background technology
As touch-control industry rapidly develops, the application with the electronic product of touch function is more and more universal, for example, intelligence
Energy type mobile phone, tablet computer, Vehicular navigation equipment etc..User can be by means of stylus, on this kind of electronic product
Input required information.In general, the stylus with pressure sensitive ability is by way of pressure-sensing, in touch panel
It is upper to generate corresponding information.When the stylus place of connecing to touch panel senses the variation of external pressure, induction frequencies
Also it changes correspondingly, touch panel is made to receive the signal that stylus is sent out and generate opposite person's handwriting whereby.
However, when stylus in i.e. into contact with touch panel instantly, interference due to ambient noise or other are former
Cause easily makes to generate happening for wrong report point (or being commonly called as " leak ") between stylus and touch panel.Therefore, stylus
A kind of mechanism that can prevent aforementioned wrong report point or leak is needed, to avoid the puzzlement of stylus user is caused.
Invention content
The technical problems to be solved by the invention are, provide a kind of active stylus in view of the deficiencies of the prior art,
It can be by means of active stylus be made to be shaken when touching is not with touching to have spaced different frequency, to avoid because outer
The noise disturbance of portion's environment and active stylus is made to generate the situation of wrong report point or leak.
The technical problems to be solved by the invention are achieved by the following technical solution：
A kind of active stylus, including pressing element and pressure sensing module；The one end for pressing element is set to actively
The pen tip portion of formula stylus presses element to receive external pressure；Pressure sensing module connection presses element, pressure-sensing mould
Block receives the external pressure to generate oscillator signal, when pressing element, and when external pressure is less than the first threshold value, concussion letter
It number is shaken with first frequency, external pressure is received when pressing element, and when external pressure reaches the first threshold value, oscillator signal
Concussion frequency is adjusted to second frequency, and the difference between first frequency and second frequency is more than the second threshold value.
Preferably, which includes：There is one first active circuits one first receiving terminal, one second to receive
End and one first output terminal, first receiving terminal are electrically connected a triggering endpoint, which receives an operating voltage；One
Inductance has first end and second end, and the first end of the inductance is electrically connected first output terminal of first active circuits, should
The second end of inductance is electrically connected the triggering endpoint；And an adjustable element, it is electrically connected first active circuits and the electricity
Sense, the external pressure is received when this presses element, and when the external pressure is not up to first threshold value, the adjustable element institute
The element characteristic having is constant, which is shaken with the first frequency, and the external pressure is received when this presses element, and
When the external pressure reaches first threshold value, the element characteristic possessed by the adjustable element starts to change, and makes the shake
Signal is swung to shake with the second frequency.
Preferably, which includes：One first capacitance, has first end and a second end, and the of first capacitance
Two ends receive a ground voltage；One adjustable capacitor has first end and second end, and the second end of the adjustable capacitor receives should
Ground voltage；And a first switch button, the first end of first capacitance and the first end of the adjustable capacitor are electrically connected,
The external pressure is received when this presses element, and when the external pressure is not up to first threshold value, the forbidden energy first switch is pressed
Button, the oscillator signal are shaken with the first frequency, and the external pressure is received when this presses element, and the external pressure reach this
During one threshold value, the enable first switch button, the oscillator signal is shaken with the second frequency, and wherein the element characteristic corresponds to
The capacitance of the adjustable capacitor.
Preferably, which includes：One first capacitance, has first end and a second end, and the of first capacitance
Two ends receive a ground voltage；One adjustable inductance has first end and second end, and the second end of the adjustable inductance receives should
Ground voltage；And a first switch button, the first end of first capacitance and the first end of the adjustable inductance are electrically connected,
The external pressure is received when this presses element, and when the external pressure is not up to first threshold value, the forbidden energy first switch is pressed
Button, the oscillator signal are shaken with the first frequency, and the external pressure is received when this presses element, and the external pressure reach this
During one threshold value, the enable first switch button, the oscillator signal is shaken with the second frequency, and wherein the element characteristic corresponds to
The inductance value of the adjustable inductance.
Preferably, which includes：One first capacitance, has first end and a second end, and the of first capacitance
Two ends receive a ground voltage；One trimmable resistance has first end and second end, and the second end of the trimmable resistance receives should
Ground voltage；And a first switch button, the first end of first capacitance and the first end of the trimmable resistance are electrically connected,
The external pressure is received when this presses element, and when the external pressure is not up to first threshold value, the forbidden energy first switch is pressed
Button, the oscillator signal are shaken with the first frequency, and the external pressure is received when this presses element, and the external pressure reach this
During one threshold value, the enable first switch button, the oscillator signal is shaken with the second frequency, and wherein the element characteristic corresponds to
The resistance value of the trimmable resistance.
Preferably, which includes：One first resistor has first end and second end, the first resistor
First end receives the operating voltage；One second resistance, has first end and second end, and the first end of the second resistance is electrically connected
The second end of the first resistor, the second end of the second resistance are electrically connected first output terminal；And one first operation amplifier
Device, has a first voltage input terminal, a second voltage input terminal and a voltage output end, which electrically connects
The triggering endpoint is connect, which is electrically connected the second end of the first resistor and the first end of the second resistance,
The voltage output end is electrically connected first output terminal.
Preferably, which includes：There is one second active circuits a third receiving terminal, one the 4th to receive
End and a second output terminal, the 4th receiving terminal receive an operating voltage；One inductance has first end and second end, the inductance
First end be electrically connected the second output terminals of second active circuits；And one first capacitance, there is first end and second
End, the second end of first capacitance receive a ground voltage.
Preferably, which has a pore space structure, this presses element and includes：One adjustable capacitor has one first
Electrode and a second electrode and an elastomer, the elastomer are located between the first electrode and the second electrode, this is adjustable
The second electrode of capacitance receives the ground voltage, which is fixed on the pen tip portion, which is fixed on the master
One pen body of dynamic formula stylus, the pen tip portion are axially moveable along the pen body of the active stylus；And one interlock member
Part, along the pore space structure slidably, which has a metal area to the link driving element of part, and the of first capacitance
One end, the second end of the inductance and the third receiving terminal are contacted with the metal area, and the external pressure is received when this presses element,
And the external pressure is when reaching first threshold value, the link driving element along the pen tip portion axial direction, towards the adjustable capacitor
It slides, the first end for making the first electrode touching of the metal area and the adjustable capacitor and first capacitance being connected is adjustable with this
Current path between the first electrode of formula capacitance makes the concussion frequency of the oscillator signal be less than or equal to second frequency according to this
Rate.
Preferably, when this, which presses element, receives the external pressure, which slides towards the adjustable capacitor, if
The external pressure is not up to first threshold value, is not touched between the metal end and the first end of the adjustable capacitor, and makes this
Current path between the first end of first capacitance and the first end of the adjustable capacitor is not turned on, the oscillator signal with this first
Frequency oscillation.
Preferably, which includes：One 3rd resistor has first end and second end, the 3rd resistor
First end receives the operating voltage；One the 4th resistance, has first end and second end, and the first end of the 4th resistance is electrically connected
The second end of the 3rd resistor, the second end of the 4th resistance are electrically connected the second output terminal；And one second operation amplifier
Device has a tertiary voltage input terminal, one the 4th voltage input end and a second voltage output terminal, tertiary voltage input terminal electricity
Property connect the third receiving terminal, the 4th voltage input end is electrically connected the of the second end of the first resistor and the second resistance
One end, the second voltage output terminal are electrically connected the second output terminal.
Summary, active stylus provided by the present invention by means of setting the threshold value of external pressure, make actively
Whether formula stylus can reach threshold value according to external pressure, generate concussion respectively with different first frequencies and second frequency
Signal, so as to make active stylus can be to avoid because active stylus is made to generate wrong report point during the noise disturbance of external environment
Or the situation of leak.
It is above about the explanation of the content of present invention and the explanation of following embodiment demonstrating and explain the present invention
Spirit and principle, and provide the present invention claims further explain.
Description of the drawings
Fig. 1 is the block schematic diagram of the active stylus of one embodiment of the invention；
Fig. 2A is the frequency change schematic diagram of one embodiment of the invention；
Fig. 2 B are the frequency change schematic diagram of another embodiment of the present invention；
Fig. 3 is the structure and circuit diagram of the active stylus of one embodiment of the invention；
Fig. 4 is the capacitance variations schematic diagram of one embodiment of the invention；
Fig. 5 is the structure and circuit diagram of the active stylus of one embodiment of the invention；
Fig. 6 is the structure and circuit diagram of the active stylus of one embodiment of the invention；
Fig. 7 is the equivalent circuit diagram of the active stylus of one embodiment of the invention.
【Reference sign】
1：Active stylus
10、10’：Press element
102、1241’：Adjustable capacitor
1021：First electrode
1022：Second electrode
1023：Elastomer
104：Link driving element
11：Pen tip portion
12、12’：Pressure sensing module
120：First active circuits
120’：Second active circuits
1202：First resistor
1203：Second resistance
1202’：3rd resistor
1203’：4th resistance
1201：First operational amplifier
1201’：Second operational amplifier
124’：Adjustable element
1240’：First capacitance
1242’：First switch button
122、122’：Inductance
14：Pen body
E1：First receiving terminal
E2：Second receiving terminal
E3：First output terminal
E1’：Third receiving terminal
E2’：4th receiving terminal
E3’：Second output terminal
Vtri：Trigger endpoint
VD：Operating voltage
L：Length
GND：Ground voltage
f1：First frequency
f2：Second frequency
f3：Third frequency
C1、C2：Capacitance
T1：First threshold value
T2：Second threshold value
UTCH：Non- touching area
TCH：Touch Zone
Specific embodiment
The detailed features and advantage of the narration present invention, content are enough to make this field skill in detail in embodiments below
Art personnel understand the technology contents of the present invention and implement according to this, and content, the claim according to recorded in this specification are protected
Range and attached drawing, skilled person readily understands that the relevant purpose of the present invention and advantage.Following embodiment is into one
Step the viewpoint that the present invention will be described in detail, but it is non-anyways to limit scope of the invention.
Please with reference to Fig. 1 and Fig. 2A, Fig. 1 is the block schematic diagram of the active stylus of one embodiment of the invention,
Fig. 2A is the frequency change schematic diagram of one embodiment of the invention.As shown in Figure 1, active stylus 1 includes pressing element 10
With pressure sensing module 12.The one end for pressing element 10 is arranged at the pen tip portion 11 of active stylus 1, and partial presses
Element 10 is exposed to the outside in pen tip portion 11.Element 10 is pressed to receive external pressure.In an example, the external pressure
Power refers to that touch panel is applied to the reaction force of active stylus 1 when active stylus 1 touches touch panel.
The connection of pressure sensing module 12 presses element 10.Pressure sensing module 12 is generating oscillator signal.The oscillator signal by
Active stylus 1 is sent out, and is sent to corresponding touch panel and is generated corresponding start, such as produced on touch panel
Raw different person's handwriting.In this embodiment, as shown in Fig. 1 and Fig. 2A, external pressure, and external pressure are received when pressing element 10
When power is less than the first threshold value T1, oscillator signal is shaken with first frequency f1.External pressure is received, and when outer when pressing element 10
When portion's pressure reaches the first threshold value T1, the concussion frequency of oscillator signal is adjusted to second frequency f2.First frequency f1 and
Difference between two frequency f2 is more than the second threshold value T2.
Specifically, in Fig. 2A embodiments, when the element 10 that presses of active stylus 1 is received less than the first threshold
During the external pressure of value T1, oscillator signal caused by pressure sensing module 12 has first frequency f1.Conversely, when active
Stylus 1 presses the reception of element 10 when reaching the external pressure of the first threshold value T1, produced by pressure sensing module 12
Oscillator signal have second frequency f2.And as shown in Figure 2 A, when external pressure is less than the first threshold value T1, oscillator signal
Frequency is maintained at first frequency f1, and active stylus 1, which is in not touch in state, that is, Fig. 2A, at this time does not touch area
UTCH.When touch panel receives the oscillator signal with first frequency f1, corresponding start can't be generated.In other words
It says, active stylus 1 and touch panel judge user and insubstantial to perform touch control operation.Relatively, work as external pressure
When reaching the first threshold value T1 and continuing to gradually increase, the frequency of oscillator signal can decline therewith.In other words, oscillator signal
Frequency can be gradually reduced according to external pressure by second frequency f2.Active stylus 1 is in touching state at this time,
It is exactly the touching area TCH in Fig. 2A.In touching in area TCH, different degrees of external pressure can cause the frequency of oscillator signal to produce
Changing, and then touch panel is made to show different corresponding starts, such as the person's handwriting of different kenels.
Please with reference to Fig. 1 and Fig. 2 B.Fig. 2 B are another embodiment of the present invention frequency change schematic diagram.Such as Fig. 2 B institutes
Show, in this embodiment, external pressure is received when pressing element 10, and when external pressure is less than the first threshold value T1, concussion
Signal is shaken with first frequency f1, and active stylus 1, which is in not touch in state, that is, Fig. 2 B, at this time does not touch area
UTCH.External pressure is received, and when external pressure reaches the first threshold value T1 when pressing element 10, the concussion frequency of oscillator signal
Rate is adjusted to third frequency f3.Difference between first frequency f1 and third frequency f3 is more than the second threshold value T2.Fig. 2 B's
Embodiment and the embodiment of Fig. 2A the difference lies in, in the embodiment of Fig. 3, when external pressure reach the first threshold value T1 and
When continuing to gradually increase, the frequency of oscillator signal can rise therewith.In other words, the frequency of oscillator signal can be according to external pressure
Power is gradually increasing by third frequency f3.Active stylus 1 is in the touching in touching state, that is, Fig. 2 B at this time
Area TCH.
For convenience of explanation, the frequency change schematic diagram of following embodiment corresponding diagram 2A illustrates.Fig. 3 is the present invention
An embodiment active stylus structure and circuit diagram.As shown in figure 3, in order to clearly demonstrate active touch-control
The function mode of pen, Fig. 3 is divided into the circuit diagram on right side and the structure chart in left side, to indicate pressure sensing module 12 respectively
Equivalent circuit diagram and the internal structure chart for pressing element 10.As shown in the circuit diagram on the right side of Fig. 3, pressure sensing module 12 includes the
One active circuits 120,122 and first capacitance 124 of inductance.First active circuits 120 have the first receiving terminal E1, the second receiving terminal
E2 and the first output terminal E3.Second receiving terminal E2 receives operating voltage VD.Inductance 122 has first end and second end, inductance 122
First end be electrically connected the first active circuits 120 the first output terminal E3.First capacitance 124 has first end and second end,
The second end of first capacitance 124 receives ground voltage GND.It is active as shown in the structure chart on the left of Fig. 3 in an embodiment
The pen tip portion of stylus 1 has pore space structure 110.It presses element 10 and includes adjustable capacitor 102 and link driving element 104.It is adjustable
Formula capacitance 102 has first electrode 1021 and second electrode 1022 and elastomer 1023.Elastomer 1023 is located at first electrode
Between 1021 and second electrode 1022.
In in practice, the elastomer 1023 is formed, such as rubber, silica gel or plastics by the elastic material to insulate
Spring processed etc. has the element of elastic characteristic.The first electrode 1021 that the both sides of elastomer 1023 are connected and second electrode 1022
It stores charge and forms capacitance.Can by means of apply pressure adjustment first electrode 1021 and second electrode 1022 between away from
From, and change the capacitance of adjustable capacitor 102.The second electrode 1022 of adjustable capacitor 102 receives ground voltage GND, the
One electrode 1021 is fixed on pen tip portion 11.Second electrode 1022 is fixed on pen body 14, and pen tip portion 11 is along active stylus 1
Pen body 14 is axially moveable.
Partial link driving element 104 can be slided along pore space structure 110.Link driving element 104 has metal area 1041.First
The first end of capacitance 124, the second end of inductance 122 and the first receiving terminal E1 are contacted with the metal area 1041 of link driving element 104.
Please with reference to Fig. 4, Fig. 4 is the capacitance variations schematic diagram of one embodiment of the invention.As shown in figure 4, the capacitance variations of Fig. 4 are shown
It is intended to the frequency change schematic diagram of corresponding diagram 2A.The is not up to when pressing element 10 and just having started to receive external pressure and external pressure
During one threshold value F1, link driving element 104 is increasingly towards adjustable capacitor 102 and slides along the axial direction of pen tip 11.At this point, due to
The first electrode 1021 of metal area 1041 and adjustable capacitor 102, which is touched, not yet to be touched, therefore the capacitance of active stylus 1 is consolidated
Surely capacitance C1 is held in, and its oscillator signal is shaken with first frequency f1.At this point, active stylus 1 is in non-touch-control
State, that is, the non-touch area UTCH of Fig. 2A and Fig. 4.Please with reference to Fig. 5, Fig. 5 is the active of one embodiment of the invention
The structure and circuit diagram of formula stylus.As shown in figure 5, when external pressure gradually increases and reaches the first threshold value T1,
Link driving element 104 touches the second electrode 1022 of adjustable capacitor 102.Simultaneously as link driving element 104 is towards adjustable electric
Hold 102 and slided length L, so that metal area 1041 and the first electrode 1021 of adjustable capacitor 102 are mutually touched, at this time
Current path between the first end of first capacitance 124 and the first electrode 1021 of adjustable capacitor 102 is switched on.It is at this point, main
The capacitance of dynamic formula stylus 1 rises to capacitance C2 by capacitance C1, and the concussion frequency of its oscillator signal is exactly equal to second
Frequency f2.
Please with reference to Fig. 6, Fig. 6 is the structure and circuit diagram of the active stylus of one embodiment of the invention.
As shown in fig. 6, after link driving element 104 touches second electrode 1022 of adjustable capacitor 102, if external pressure continues at this time
Increase during more than the first threshold value T1, link driving element 104 will continue to slide towards adjustable capacitor 102, and then extruding first
Electrode 1021.As shown in fig. 6, since first electrode 1021 is fixedly arranged on pen tip portion 11, when first electrode 1021 is extruded,
Further pen tip portion 11 can be driven to be slided towards second electrode 1022, so compress first electrode 1021 and second electrode 1022 it
Between institute's sandwiched elastomer 1023.Referring again to shown in Fig. 6, since second electrode 1022 is fixedly arranged on pen body 14, work as elastomer
1023 when being compressed, and the distance between first electrode 1021 and second electrode 1022 can gradually decrease so that adjustable capacitor 102
Capacitance increase is gradually continued up by capacitance C2.At this point, active stylus 1 is in touch-control state, that is, Fig. 2 with
Touch Zone TCH in Fig. 4.And in another example, when external pressure reaches the first threshold value T1 and continues to gradually increase, shake
The frequency for swinging signal rises, and capacitance can accordingly decline, the content based on previous embodiment, and fields, which have, usually to be known
The knowledgeable can reasonably deduce its structure and start principle, therefore it will not go into details in this.
In an embodiment, the first active circuits 120 include first resistor 1202 and second resistance 1203.First resistor
1202 have first end and second end, and the first end of first resistor 1203 receives operating voltage VD.Second resistance 1203 has the
One end and second end.The first end of second resistance 1203 is electrically connected the second end of the first resistor 1202, second resistance 1203
Second end be electrically connected the first output terminal E3.First operational amplifier 1201 is defeated with first voltage input terminal, second voltage
Enter end and tertiary voltage output terminal.First voltage input terminal is electrically connected the first receiving terminal E1, and second voltage input terminal electrically connects
The second end of first resistor 1203 and the first end of second resistance 1203 are connect, tertiary voltage output terminal is electrically connected the first output terminal
E3。
In general, during user carries out touch control operation using active stylus, Chang Yinwei external environments
The influence of noise leads to the erroneous judgement of active stylus and touch panel.For example, when user holds active stylus
During very close to touch panel, user and insubstantial however because outer in the input of the enterprising row information of touch panel at this time
The reason of portion's ambient noise so that touch panel shows corresponding unexpected start, that is, so-called " leak ".Pass through this
The active stylus 1 supplied is invented, by means of the increased first frequency f1 of institute and second frequency between not touching in touching and
Difference between f2 so that active stylus 1 can accurately judge whether user will carry out touch control operation, to avoid
So-called " leak " problem, and influence the usage experience of active stylus.
Fig. 7 is please referred to, Fig. 7 is the equivalent circuit diagram of the active stylus of one embodiment of the invention, as shown in fig. 7,
It corresponds to the active stylus of Fig. 1, and in this embodiment, pressure sensing module 12 ' includes the second active circuits 120 ', electricity
Sense 122 ' and adjustable element 124 '.Second active circuits 120 ' have third receiving terminal E1 ', the 4th receiving terminal E2 ' and second
Output terminal E3 '.First receiving terminal E1 ' is electrically connected triggering endpoint Vtri, the second receiving terminal reception operating voltage VD.Inductance 122 '
With first end and second end.The first end of inductance 122 ' is electrically connected the second output terminal E3 ' of the second active circuits 120 ', the
Two ends are electrically connected triggering endpoint Vtri.Adjustable element 124 ' is electrically connected the second active circuits 120 ' and inductance 122 '.When tactile
When pressure element 10 ' receives external pressure and external pressure and is not up to the first threshold value T1, member possessed by adjustable element 124 '
Part characteristic is constant, and oscillator signal is shaken with first frequency f1.Reach the when pressing element 10 ' and receiving external pressure and external pressure
During one threshold value T1, element characteristic possessed by adjustable element 124 ' starts to change, and makes oscillator signal with second frequency f2
Concussion.In an example, adjustable element 124 ' includes adjustable capacitor, and the element characteristic corresponds to adjustable capacitor
Capacitance.In another example, adjustable element 124 ' includes adjustable inductance, and the element characteristic corresponds to adjustable
The inductance value of inductance.In another example, adjustable element 124 ' includes trimmable resistance, and the element characteristic corresponds to can
The resistance value of mode resistance.
In an embodiment, adjustable element 124 ' is opened including the first capacitance 1240 ', adjustable capacitor 1241 ' with first
Close button 1242 '.First capacitance 1240 ' has first end and second end, and the second end of the first capacitance 1240 ' receives ground voltage
Vd.Adjustable element 124 ' has first end and second end, and second end receives ground voltage GND.First switch button 1242 '
It is electrically connected the first end of the first capacitance 1240 ' and the first end of adjustable capacitor 1241 '.Outside is received when pressing element 10 '
When pressure and external pressure are not up to the first threshold value T1, first switch button 1242 ' is disabled, and oscillator signal is with first frequency
F1 shakes.External pressure is received, and when external pressure reaches the first threshold value T1 when pressing element 10, first switch button
1242 ' are enabled (enabled, switch conduction), and oscillator signal is shaken with second frequency f2.For the example of a reality,
When active stylus 1 slightly touching touch panel, it is assumed that the power of touching is also not up to the first threshold value T1, first switch
The state that does not turn on is presented in button 1242 ', at this point, as shown in Fig. 2, oscillator signal fixation is shaken with first frequency f1, and touch-control
Panel will not show corresponding start.When the power of touching reaches the first threshold value T1, first switch button 1242 ' is presented
The state of conducting.At this point, the concussion frequency of oscillator signal drops to second frequency f2 by first frequency f1, touch panel is shown out
Begin to show corresponding start.If the power of touching continue to increase and during more than the first threshold value T1, the concussion of oscillator signal
Frequency also rises therewith, so as to show corresponding different starts in touch panel.
For another practical example, the first switch button 1242 ' can be active stylus handle 1
On a button.When user holds active stylus 1, if user be not intended to it is any in making on touch panel
Control action just not press button at this time.In this scenario, first switch button 1242 ' in forbidden energy, (do not lead by switch
It is logical) state, the oscillator signal fixation that active stylus 1 is sent out shaken with first frequency f1, and touch panel will not generate
Corresponding start.Conversely, when user is wanted in performing control action on touch panel, for example, write or map, Yong Huke
To press button so that first switch button 1242 ' is enabled, at this point, the concussion frequency of oscillator signal is less than or equal to the second frequency
Rate f2, and touch panel starts to show corresponding start.
In an embodiment, second active circuits 120 ' including 3rd resistor 1202 ', the 4th resistance 1203 ' with
Second operational amplifier 122 '.3rd resistor 1202 ' has first end and second end, and first end receives operating voltage VD.The
Four resistance 1203 ' have first end and second end, and first end is electrically connected the second end of 3rd resistor 1202 ', second end electricity
Property connection second output terminal E3 '.Second operational amplifier 122 ' has first voltage input terminal, second voltage input terminal and voltage
Output terminal.First voltage input terminal is electrically connected triggering endpoint Vtri, second voltage input terminal electric connection 3rd resistor 1202 '
Second end and the 4th resistance 1203 ' first end, voltage output end is electrically connected second output terminal E3 '.
The active stylus that above-described embodiment is proposed is changed by means of the capacitance of adjustable capacitor 1241 ', collocation
The structure of Fig. 3 or the structure of button, the problem of preventing leak to reach.However in other embodiment, active stylus
The problem of preventing leak by means of other adjustable devices to reach.For example, the active stylus in Fig. 7 is adjustable
Adjustable capacitor 1241 ' included by formula element 124 ' can be substituted by adjustable inductance, and user can be by means of pressing
Button or the coil turn for adjusting position or adjustment controllable impedance of the metal iron core of controllable impedance in coil so that
Inductance value changes, and then reaches the function mode of above-mentioned active stylus.In another example, the active in Fig. 7
Adjustable capacitor 1241 ' included by the adjustable element 124 ' of formula stylus can be substituted by trimmable resistance, and user is same
Sample can by means of pressing the self-cleaning contact between the mode of button or adjustment adjustable resistance both ends, and then change resistance value and
Reach the function mode of above-mentioned active stylus.The present invention is not limited with the adjustable device in above-described embodiment.
In summary described, the of the invention active stylus, by means of being applied to active stylus according to external
The setting of pressure and switch element (or link driving element) so that have between the first frequency and second frequency of oscillator signal
One difference, so allow active stylus can to avoid because of noise disturbance caused by external environment, and generate wrong report point or
The problem of being leak so that user can have preferable touch experience.
Claims (10)
1. a kind of active stylus, which is characterized in that including：
One presses element, and one end is set to a pen tip portion of the active stylus, this presses element to receive outside one
Pressure；And
One pressure sensing module connects this and presses element, and the pressure sensing module is to generate an oscillator signal, when this presses member
Part receives the external pressure, and when the external pressure is less than first threshold value, which is shaken with a first frequency, when
This presses element and receives the external pressure, and when the external pressure reaches first threshold value, the concussion frequency of the oscillator signal
Rate is adjusted to a second frequency；
Difference wherein between the first frequency and the second frequency is more than one second threshold value.
2. active stylus as described in claim 1, which is characterized in that the pressure sensing module includes：
One first active circuits have one first receiving terminal, one second receiving terminal and one first output terminal, first receiving terminal electricity
Property connection one triggering endpoint, second receiving terminal receive an operating voltage；
One inductance, has first end and a second end, the first end of the inductance be electrically connected first active circuits this is first defeated
Outlet, the second end of the inductance are electrically connected the triggering endpoint；And
One adjustable element is electrically connected first active circuits and the inductance, and the external pressure is received when this presses element, and
When the external pressure is not up to first threshold value, an element characteristic possessed by the adjustable element is constant, the oscillator signal
It is shaken with the first frequency, the external pressure is received when this presses element, and when the external pressure reaches first threshold value, it should
The element characteristic possessed by adjustable element starts to change, and the oscillator signal is made to be shaken with the second frequency.
3. active stylus as claimed in claim 2, which is characterized in that the adjustable element includes：
One first capacitance, has first end and second end, and the second end of first capacitance receives a ground voltage；
One adjustable capacitor, has first end and second end, and the second end of the adjustable capacitor receives the ground voltage；And
One first switch button, is electrically connected the first end of first capacitance and the first end of the adjustable capacitor, when this is pressed
Element receives the external pressure, and when the external pressure is not up to first threshold value, the forbidden energy first switch button, the concussion
Signal is shaken with the first frequency, and the external pressure is received, and the external pressure reaches first threshold value when this presses element
When, the enable first switch button, the oscillator signal is shaken with the second frequency, and wherein it is adjustable to correspond to this for the element characteristic
The capacitance of capacitance.
4. active stylus as claimed in claim 2, which is characterized in that the adjustable element includes：
One first capacitance, has first end and second end, and the second end of first capacitance receives a ground voltage；
One adjustable inductance, has first end and second end, and the second end of the adjustable inductance receives the ground voltage；And
One first switch button, is electrically connected the first end of first capacitance and the first end of the adjustable inductance, when this is pressed
Element receives the external pressure, and when the external pressure is not up to first threshold value, the forbidden energy first switch button, the concussion
Signal is shaken with the first frequency, and the external pressure is received, and the external pressure reaches first threshold value when this presses element
When, the enable first switch button, the oscillator signal is shaken with the second frequency, and wherein it is adjustable to correspond to this for the element characteristic
The inductance value of inductance.
5. active stylus as claimed in claim 2, which is characterized in that the adjustable element includes：
One first capacitance, has first end and second end, and the second end of first capacitance receives a ground voltage；
One trimmable resistance, has first end and second end, and the second end of the trimmable resistance receives the ground voltage；And
One first switch button, is electrically connected the first end of first capacitance and the first end of the trimmable resistance, when this is pressed
Element receives the external pressure, and when the external pressure is not up to first threshold value, the forbidden energy first switch button, the concussion
Signal is shaken with the first frequency, and the external pressure is received, and the external pressure reaches first threshold value when this presses element
When, the enable first switch button, the oscillator signal is shaken with the second frequency, and wherein it is adjustable to correspond to this for the element characteristic
The resistance value of resistance.
6. active stylus as claimed in claim 2, which is characterized in that first active circuits include：
One first resistor, has first end and second end, and the first end of the first resistor receives the operating voltage；
One second resistance, has first end and second end, and the first end of the second resistance is electrically connected the second of the first resistor
End, the second end of the second resistance are electrically connected first output terminal；And
One first operational amplifier has a first voltage input terminal, a second voltage input terminal and a voltage output end, this
One voltage input end is electrically connected the triggering endpoint, which is electrically connected the second end of the first resistor with being somebody's turn to do
The first end of second resistance, the voltage output end are electrically connected first output terminal.
7. active stylus as described in claim 1, which is characterized in that the pressure sensing module includes：
One second active circuits have a third receiving terminal, one the 4th receiving terminal and a second output terminal, and the 4th receives termination
Receive an operating voltage；
One inductance, has first end and a second end, the first end of the inductance be electrically connected second active circuits this is second defeated
Outlet；And
One first capacitance, has first end and second end, and the second end of first capacitance receives a ground voltage.
8. active stylus as claimed in claim 7, which is characterized in that the pen tip portion has a pore space structure, this is pressed
Element includes：
One adjustable capacitor, has a first electrode and a second electrode and an elastomer, which is located at first electricity
Between pole and the second electrode, the second electrode of the adjustable capacitor receives the ground voltage, which is fixed on this
Pen tip portion, the second electrode are fixed on a pen body of the active stylus, which should along the active stylus
Pen body is axially moveable；And
One link driving element, along the pore space structure slidably, which has a metal area to the link driving element of part, should
The first end of first capacitance, the second end of the inductance and the third receiving terminal are contacted with the metal area, are connect when this presses element
The external pressure is received, and when the external pressure reaches first threshold value, the link driving element is along the axial direction in the pen tip portion, direction
The adjustable capacitor is slided, and is made the first electrode touching of the metal area and the adjustable capacitor and is connected the of first capacitance
Current path between this of one end and the adjustable capacitor first electrode, make according to this oscillator signal concussion frequency be less than etc.
In the second frequency.
9. active stylus as claimed in claim 8, which is characterized in that when this, which presses element, receives the external pressure,
The link driving element is slided towards the adjustable capacitor, if the external pressure is not up to first threshold value, which can with this
It does not touch, and makes between the first end of first capacitance and the first end of the adjustable capacitor between the first end of mode capacitance
Current path is not turned on, which is shaken with the first frequency.
10. active stylus as claimed in claim 7, which is characterized in that second active circuits include：
One 3rd resistor, has first end and second end, and the first end of the 3rd resistor receives the operating voltage；
One the 4th resistance, has first end and second end, and the first end of the 4th resistance is electrically connected the second of the 3rd resistor
End, the second end of the 4th resistance are electrically connected the second output terminal；And
One second operational amplifier has a tertiary voltage input terminal, one the 4th voltage input end and a second voltage output terminal,
The tertiary voltage input terminal is electrically connected the third receiving terminal, and the 4th voltage input end is electrically connected the second of the first resistor
End and the first end of the second resistance, the second voltage output terminal are electrically connected the second output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611169300.8A CN108205381B (en) | 2016-12-16 | 2016-12-16 | Active stylus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611169300.8A CN108205381B (en) | 2016-12-16 | 2016-12-16 | Active stylus |
Publications (2)
| Publication Number | Publication Date |
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| CN108205381A true CN108205381A (en) | 2018-06-26 |
| CN108205381B CN108205381B (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611169300.8A Active CN108205381B (en) | 2016-12-16 | 2016-12-16 | Active stylus |
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| CN (1) | CN108205381B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110658935A (en) * | 2018-06-29 | 2020-01-07 | 京东方科技集团股份有限公司 | Data detection method and device, storage medium and touch device |
| CN111142695A (en) * | 2018-11-02 | 2020-05-12 | 矽统科技股份有限公司 | Touch control system |
| WO2020173390A1 (en) * | 2019-02-28 | 2020-09-03 | 华为技术有限公司 | Active stylus calibration method, active stylus and electronic device |
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| US20080129709A1 (en) * | 2006-12-01 | 2008-06-05 | Chun-Lin Lin | Electromagnetic Pen With Amplitude-Controlled Inking Function |
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| CN111142695A (en) * | 2018-11-02 | 2020-05-12 | 矽统科技股份有限公司 | Touch control system |
| CN111142695B (en) * | 2018-11-02 | 2023-06-30 | 矽统科技股份有限公司 | Touch control system |
| WO2020173390A1 (en) * | 2019-02-28 | 2020-09-03 | 华为技术有限公司 | Active stylus calibration method, active stylus and electronic device |
| US11392226B2 (en) * | 2019-02-28 | 2022-07-19 | Huawei Technologies Co., Ltd. | Active stylus calibration method, active stylus, and electronic device |
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|---|---|
| CN108205381B (en) | 2021-09-24 |
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