KR20160123615A - Mobile terminal comprising a stylus pen and a touch panel - Google Patents
Mobile terminal comprising a stylus pen and a touch panel Download PDFInfo
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- KR20160123615A KR20160123615A KR1020150053867A KR20150053867A KR20160123615A KR 20160123615 A KR20160123615 A KR 20160123615A KR 1020150053867 A KR1020150053867 A KR 1020150053867A KR 20150053867 A KR20150053867 A KR 20150053867A KR 20160123615 A KR20160123615 A KR 20160123615A
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- electrodes
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- stylus pen
- touch
- electric signal
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- H04M1/72527—
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- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
Description
The present invention relates to a mobile terminal including a stylus pen and a touch panel, and more particularly, to a mobile terminal capable of transmitting and receiving an electric signal between a touch panel and a stylus pen.
2. Description of the Related Art Touch panels are used as means for inputting characters, pictures, and the like in various electronic devices such as mobile phones and personal computers. The touch panel senses the touch of the hand or the stylus pen and performs signal processing for converting it into an electric signal.
When an electronic circuit is built in the stylus pen, it can perform a mouse function such as selecting a part of an image or dragging an electric signal from a stylus pen as well as a simple touch input.
In this manner, when an electronic circuit is built in the stylus pen, electric power is required to operate the electronic circuit of the stylus pen. For example, there is a method of supplying power from a built-in battery by incorporating a battery into the stylus pen.
In recent years, a method has been used in which a separate dedicated panel for power supply is provided in a main body of a cellular phone, and a necessary power is supplied wirelessly from a separate dedicated panel to the stylus pen.
(Patent Document 1) JP 4866941 B
The power supply technique disclosed in
However, as described above, separately installing a power transmission device including an induction coil below the LCD module to supply power to the stylus pen causes an increase in cost, which increases the thickness of the mobile phone.
In addition, when the electrode line of the touch panel is made into a coil, since the resistance component due to the electrode lines of the touch panel is large, the energy is released as heat by the resistance before the circuit is in the resonance state, There is a problem.
In order to solve such a problem, there is an increasing need for a technology for supplying power to the stylus pen using an existing touch panel and sensing a signal received from the stylus pen without a separate power transmission device.
An object of the present invention is to provide a mobile terminal including a stylus pen and a touch panel capable of transmitting and receiving an electric signal between a touch panel and a stylus pen by a capacitive coupling method.
It is another object of the present invention to provide a mobile terminal including a stylus pen and a touch panel capable of discriminating a touch object by touching the touch panel.
A mobile terminal including a stylus pen according to an embodiment of the present invention includes a touch panel having a plurality of touch panel electrodes, a stylus pen configured to transmit and receive an electric signal to and from the touch panel, And a control unit for determining whether the target object to be touched is the stylus pen by using a touch panel electrode adjacent to a point where the touch is applied among the plurality of touch panel electrodes when a touch is applied to the touch panel.
In an exemplary embodiment, the touch panel may include a plurality of TX electrodes and a plurality of RX electrodes arranged to cross the TX electrodes, and the control unit may use at least one of the plurality of TX electrodes and the plurality of RX electrodes A touch point on the touch panel is detected, and an electrical signal having a preset frequency is applied to the TX electrode adjacent to the detected point among the plurality of TX electrodes based on the detected point to perform the determination .
In one embodiment of the present invention, when the electric signal related to the electric signal is received by at least one of the plurality of RX electrodes after applying the electric signal to the TX electrode adjacent to the detected point, It is determined that the stylus pen is the stylus pen.
In one embodiment, the predetermined frequency is a resonance frequency of an LC circuit provided in the stylus pen, and the electric signal related to the electric signal is the electric signal having the resonance frequency and emitted from the stylus pen. do.
In one embodiment of the present invention, when a touch is applied to a plurality of points on the touch panel, the controller applies an electric signal having the predetermined frequency to at least one TX electrode adjacent to each of the plurality of points, And detects a point touched by the stylus pen among the points.
In one embodiment of the present invention, the control unit sequentially applies the electric signal to the TX electrodes adjacent to the plurality of points in accordance with the elapse of time, and at least one of the plurality of RX electrodes generates an electric signal related to the electric signal And a point touched by the stylus pen is detected based on a time point at which the touch point is received.
In one embodiment, when the TX electrodes adjacent to the plurality of points are one of the same TX electrodes, the control unit may control the stylus unit based on RX electrodes on which electrical signals related to the electrical signals among the plurality of RX electrodes are received. And a point touched by the pen is detected.
In one embodiment of the present invention, the control unit applies electric signals having phases different from each other to the TX electrodes adjacent to the plurality of points to detect points touched by the stylus pen.
In one embodiment of the present invention, an electrical signal having a first phase is applied to a first one of the TX electrodes adjacent to the plurality of points, and a second one of the TX electrodes adjacent to the plurality of points, And an electrical signal having a second phase different from the first phase is applied to the TX electrode.
In one embodiment, the electrical signals having different phases are simultaneously applied to the TX electrodes adjacent to the plurality of points.
In an exemplary embodiment, when at least two TX electrodes of the TX electrodes adjacent to the plurality of points are adjacent to each other, the controller may apply an electrical signal to the at least two adjacent TX electrodes so that electrical signals having different phases are not simultaneously applied And the electric signals having the different phases are applied to the plurality of TX electrodes according to a predetermined method.
In one embodiment, the plurality of TX electrodes include first through fourth TX electrodes sequentially arranged, and the adjacent at least two TX electrodes are connected to the second and third TX electrodes of the first through fourth TX electrodes, , The control unit applies an electric signal having the different phase to the first and third TX electrodes or an electric signal having the different phases to the second and fourth TX electrodes .
In one embodiment of the present invention, when the electric signal having the different phases is applied to the TX electrodes and then an electric signal related to the electric signal is received in at least one of the plurality of RX electrodes, And detects a point touched by the stylus pen based on the phase of the signal.
A method of controlling a mobile terminal having a stylus pen according to an embodiment of the present invention includes detecting a point where the touch is applied when a touch is applied to the touch panel of the mobile terminal, And determining whether the target object to which the touch is applied is the stylus pen using the touch panel electrode adjacent to the point where the touch is applied.
In one embodiment of the present invention, the determining step comprises: after applying an electric signal having a predetermined frequency to a touch panel electrode adjacent to a point where the touch is applied, an electric signal related to the electric signal is transmitted to at least one of the plurality of touch panel electrodes And when it is received, determines that the object to which the touch is applied is the stylus pen.
According to the present invention, an electric signal can be transmitted and received with the stylus pen using an existing touch panel. Therefore, it is not necessary to provide a separate power supply device formed of a coil, so that the cost can be reduced and the thickness of the mobile terminal can be made thinner.
In addition, the present invention can supply an electric signal to the stylus pen through a capacitive coupling and apply a touch to the touch panel through an electric signal generated in a resonance state. Therefore, the present invention can provide a stylus pen having no separate power source unit and composed of simpler circuits, thereby reducing cost and making the weight of the stylus pen lighter.
Further, in the present invention, when a touch is applied to the touch panel, the touch panel electrode adjacent to the point where the touch is applied can be used to determine whether the object subjected to the touch is a stylus pen. Therefore, according to the present invention, there is provided a control method of using a touch panel electrode adjacent to a point where a touch is applied to determine whether a target object to which the touch is applied is an object other than a stylus pen or a stylus pen (for example, a finger) .
According to another aspect of the present invention, there is provided a touch panel including a plurality of points, wherein when a plurality of touch points are simultaneously applied to a touch panel, electrical signals having different phases are simultaneously applied to touch panel electrodes adjacent to the plurality of points, It is possible to improve the speed at which the touch point is detected by the stylus pen.
1 is a conceptual diagram illustrating a mobile terminal having a stylus pen and a touch panel.
2A and 2B are conceptual diagrams illustrating a stylus pen according to an embodiment of the present invention.
3 is a conceptual diagram illustrating a touch panel electrode included in a touch panel according to an embodiment of the present invention.
FIG. 4 is a circuit diagram illustrating a method of transmitting and receiving an electrical signal through a capacitive coupling, according to an exemplary embodiment of the present invention. Referring to FIG.
5 is a flowchart typically showing a control method of the present invention.
6 is a conceptual diagram for explaining the control method shown in FIG.
7A and 7B are conceptual diagrams for explaining a method of discriminating a touch object on a touch panel according to an embodiment of the present invention.
8A and 8B are conceptual diagrams for explaining a method of discriminating a touch object on a touch panel according to another embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.
Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.
It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.
The singular expressions include plural expressions unless the context clearly dictates otherwise.
In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.
The mobile terminal described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate PC A tablet PC, an ultrabook, a wearable device such as a smartwatch, a smart glass, and a head mounted display (HMD). have.
However, it will be appreciated by those skilled in the art that the configuration according to the embodiments described herein may be applied to fixed terminals such as a digital TV, a desktop computer, a digital signage, and the like, will be.
Referring to FIG. 1, FIG. 1 is a conceptual diagram illustrating a mobile terminal having a stylus pen and a touch panel.
The
The
The
That is, the
The
The
The
As an example, the
When there is a touch input to the
Meanwhile, the control unit may perform different controls or perform the same control according to the type of the touch object touching the touch screen (or a touch key provided in the touch screen). Depending on the kind of the touch target object, whether to perform different controls or to perform the same control may be determined according to the current operating state of the mobile terminal 100 or an application program being executed.
There may be two or
The
Further, the control unit 180 can determine the type of the input means to which the touch is applied based on the transmitted signal. Further, the control unit 180 can detect a point (position, part) where the touch is applied based on the transmitted signal.
Hereinafter, a stylus pen will be described as an example of a means for inputting a user command on the touch panel. The present invention relates to a method for supplying an electric signal with such a stylus pen and sensing an electric signal transmitted from the stylus pen.
Specifically, in the present invention, a voltage is applied to an electrode of a
The present invention is also applicable to an electric signal (for example, an LC resonance signal) generated in the
In order to transmit an electric signal between the
In addition, the
In addition, when an electric signal is received from the
Hereinafter, a stylus pen according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings. 2A and 2B are conceptual diagrams illustrating a stylus pen according to an embodiment of the present invention.
2A, a
Since the
In order to start the resonance operation of the
A mutual capacitance CM may be formed between the
The size of the mutual capacitance CM formed between the
To this end, an AC voltage is applied to the
More specifically, when the frequency of the AC voltage and the LC resonance frequency are different from each other, the
Since the LC resonance itself does not involve consumption of electric power, even if the AC power supply is interrupted, the
When the supply of the AC voltage applied to the
On the other hand, the LC resonance frequency can be defined by the coil capacitance of the L element provided in the
The variable capacitance C can be changed, for example, by applying an external force to the
When the variable capacitance C included in the
For example, the capacity? C of the variable capacitor takes different values based on the touch pressure (or pressure) applied to the
The principle of detecting the pressure in the present invention can be understood as detecting the frequency of the resonance signal (accurately, the frequency of the resonance signal) generated by the LC resonance circuit incorporated in the stylus pen.
When the application of the AC voltage to the
The control unit detects the position of the stylus pen 20 (or the point at which the
A specific method of detecting the position of the
Hereinafter, the
The
The
The
The
Since the
Meanwhile, the
In addition, the
In the present invention, the
Specifically, the capacitive coupling can be generated between the touch panel electrode of the
Electrical signals transmitted between the
Here, the increase in the size of the electrical signal means that the size of the electrical signal itself increases, the transmission / reception ratio of the electrical signal increases, and the amount of the electrical signal increases.
The capacitor of the
Here, the mutual capacitance (CM) increases as the distance between two objects (touch panel electrode and pen tip) forming mutual capacitance due to the characteristics of the capacitor becomes closer. Accordingly, the magnitude of the electric signal transmitted / received between the
The
Accordingly, the
Further, the
The electric signal generated in the
On the other hand, the
Specifically, when the
The
The stylus pen of the present invention may further include a conductive member (24) provided in the body and electrically connected to the LC circuit to increase the size of the electrical signal. The
25, in the present invention, by electrically connecting the
Hereinafter, a touch panel for transmitting and receiving an electric signal to and from the stylus pen described with reference to FIGS. 2A and 2B will be described in detail with reference to the accompanying drawings.
FIG. 3 is a conceptual diagram illustrating a touch panel electrode included in a touch panel according to an exemplary embodiment of the present invention. FIG. 4 is a cross-sectional view of a stylus pen and a touch panel according to an exemplary embodiment of the present invention. And is a circuit diagram for explaining a method of transmitting and receiving.
The
The signal receiving unit 130 (or the touch controller) receives the signal (s) received from the
Referring to FIG. 3, the
The plurality of
4, the
At least one of the voltage supplying unit 110, the switch unit 120 and the signal receiving unit 130 may be provided in the
The control unit 180 may control the configuration (s) included in the
The control unit 180 controls the signal receiving unit 130 to detect (detect) an electrical signal received from the
The present invention can connect the voltage supply unit 110 to the
Accordingly, the voltage supply unit 110 can supply not only the voltage to the
Hereinafter, the process of transmitting and receiving an electric signal between the
Fig. 4 shows the circuit configuration on the stylus side and the circuit configuration on the touch panel side where the capacitive coupling is generated.
The stylus pen may be provided with an
If the circuit on the touch panel side is briefly displayed, the
The stray capacitances C_TXG and C_RXG may be referred to as parasitic capacitance and may be affected by the line width of the electrode lines. For example, the stray capacitance may increase as the line width increases.
In addition, the resistance component of the TX electrode and the RX electrode can be made smaller as the line width of the electrode line becomes larger.
On the other hand, mutual capacitance can be formed between the
4, when an AC voltage is applied to the
At this time, the voltage V_S, which is an electric signal of the
Here, A_1, A_2 and A_3 are proportional constants, and the electric parameters (LS, Cs, and C) of the coils and the capacitors constituting the
The first term on the left side of
The expression exp (-A_3 * t) in the second term expresses that the signal of the second term attenuates over time, and only the signal which vibrates after receiving the AC power supply signal of the first term is left. Can be understood as an operation in a general LC resonant circuit.
Here, the LC resonance signal is attenuated because the vibration energy is consumed as thermal energy by the resistance component existing in the
On the other hand, when the preset time t_a elapses, the controller 180 can control the switch SW1 to stop the supply of the AC voltage to the TX full load. The predetermined time t_a is a time at which the supply of power energy from the TX electrode to the
When the supply of the AC voltage to the
Further, the
The
The electric signal detected by the
Here, the meaning of V_RX] TX means an electric signal transmitted from the
The signal receiving unit 130 receiving the electric signal of
The above description can be applied to the same or similar analogy when the AC voltage is supplied to the
The
As described above, when an AC voltage is supplied to the
At this time, referring to Equation (1), in the
Here, the LC resonance frequency f_LC is determined by the L element Ls and the C elements Cs, C provided in the LC circuit, and may be expressed by the following equation (4).
Where Ls is the inductance of the L element, Cs is the fixed capacitance constituting the C element, and? C is the variable capacitance constituting the C element.
The signal receiving unit 130 or the control unit 180 of the
When supply of the AC voltage applied to the
The LC resonance frequency f_LC is changed as the variable capacitance C changes. The variable capacitance C can be changed, for example, by applying an external force to the
When the variable capacitance C included in the
The controller 180 changes the frequency of the electric signal output from the
The principle of detecting the touch pressure (pressure) of the stylus pen in the present invention can be understood as detecting the frequency (LC resonance frequency) of the resonance signal generated by the LC circuit incorporated in the stylus pen.
The touch panel may be touched by various objects in the mobile terminal according to an exemplary embodiment of the present invention, which may include at least one of the above-described components. The mobile terminal of the present invention may perform different functions depending on the type of object to which the touch panel is touched. To do this, it is necessary to identify the type of object to which a touch is applied to the touch panel.
Hereinafter, a method for identifying a touch object on a touch panel according to an exemplary embodiment of the present invention will be described in more detail with reference to the accompanying drawings.
FIG. 5 is a flowchart illustrating an exemplary control method of the present invention, and FIG. 6 is a conceptual diagram illustrating a control method illustrated in FIG.
First, in the present invention, when a touch is applied to the
For example, the object to which the touch is applied may be a part of the body (e.g., a finger) and the
The control unit 180 (or the touch panel 200) can detect a point where the touch is applied when the
3) constituting a plurality of touch panel electrodes 50 (see FIG. 3) included in the
In the case of the electrostatic capacity type, the controller 180 can sequentially apply a predetermined electric signal to the plurality of
If there is a
Here, in addition to the finger and the
For example, it is assumed that a touch is applied at one
If the signal strength of at least one of the plurality of TX electrodes (for example, RX3 and RX4) is changed after applying an electric signal to any one of the TX electrodes TX1 to TX4 of the plurality of TX electrodes TX1 to TX4 , The control unit 180 determines whether or not the touch is performed based on at least one of the TX electrode TX2, the RX electrodes RX3 and RX4 with changed signal strength, and the ratio of signal intensities changed in the RX electrodes RX3 and RX4. It is possible to extract the position information of the
Further, when a touch is applied to the touch panel, not only the RX electrode but also the signal intensity of the TX electrode can be changed. The control unit 180 determines at least one of the ratios of the signal intensities changed in the TX electrodes (for example, TX2 and TX3) and the TX electrodes TX2 and TX3 It is further available for extracting location information.
The control unit 180 applies analogous or similar analogy to the method described in step S510 in the case where a touch is applied to a plurality of points on the
The fact that the touch is applied at the plurality of points means that not only a case where a plurality of touches are applied at a certain point but also a case where any one of the plurality of touches is maintained and a touch different from any one of the plurality of touches is applied A case in which a plurality of touches are applied at different points within a predetermined time, and the like.
Thereafter, in the present invention, a step of determining whether the touching object is the stylus pen is performed using a touch panel electrode adjacent to a point where the touch is applied, among a plurality of touch panel electrodes included in the touch panel (S520 ).
First, the controller 180 can determine the
Here, the
Specifically, when the
For example, as shown in FIG. 6, a touch is applied between a first TX electrode TX2 and a second TX electrode TX3 of a plurality of TX electrodes, and a touch with the first TX electrode TX2 The distance d1 between the second TX electrode TX3 and the
However, the present invention is not limited thereto, and the controller 180 may control at least one of the first and second electrodes (e.g., TX2 and TX3 in FIG. 6) located on both sides of the
The control unit 180 controls the
Specifically, the controller 180 applies an electric signal having a preset frequency to a touch panel electrode (hereinafter, referred to as a TX electrode) adjacent to the touch point (point detected in step S510) (Whether the object to which the touch is applied is the stylus pen 20).
The reason why the electric signal is applied to the TX electrode adjacent to the point where the touch is applied is that when the object to which the touch is applied is a stylus pen and when the stylus pen receives an electric signal through the capacitive coupling, When the electric signal is applied to the TX electrode, the magnitude (quantity, speed, transmission rate, etc.) of the electric signal supplied to the stylus pen becomes small and the charging speed of the electric signal of the LC circuit becomes remarkably slow.
That is, the magnitude of the electric signal transmitted / received by the
The stylus pen receives an electric signal from at least one of the two TX electrodes adjacent to the one point, and when the touch target is a stylus pen, It is assumed that the touch panel senses an electrical signal received from the stylus pen through at least one of two RX electrodes adjacent to the one point. The magnitudes (amounts, speeds, transmission rates, etc.) of the electric signals transmitted and received at the TX electrodes and the RX electrodes not adjacent to one point to which the touched point is applied can be ignored because they are distant from the one point.
6, when two TX electrodes adjacent to the one
Here, the present invention can apply an electrical signal only to a closer TX electrode (the nearest TX electrode) TX2 of the two TX electrodes adjacent to the one
The predetermined frequency may be the resonance frequency of the
The reason why the electric signal having the predetermined frequency, that is, the resonance frequency of the
Meanwhile, when a predetermined electric signal is applied to the plurality of
When the control unit 180 receives the electric signal related to the electric signal from at least one of the plurality of
Here, the electrical signal related to the electrical signal may be the electrical signal having the resonant frequency and emitted (transmitted) from the
Thereafter, the
Here, the electric signal received from the
Since the first electric signal has the resonance frequency f_AC = f_LC of the
6, the controller 180 applies an electric signal having a predetermined frequency to the TX electrode TX2 adjacent to the
6, the controller 180 applies an electric signal having a predetermined frequency to the TX electrode TX2 adjacent to the
According to the present invention, not only a target object to which a touch is applied to the
Meanwhile, a plurality of touches can be simultaneously applied to the
FIGS. 7A and 7B are conceptual diagrams for explaining a method of distinguishing a touch object on a touch panel according to an embodiment of the present invention. FIG. 8A and FIG. Is a conceptual diagram for explaining a method of determining a target object to which an object is added.
First, when a plurality of touches are simultaneously applied to the
Referring to FIG. 7A, a touch may be applied to a plurality of
When a touch is applied to the plurality of
Specifically, the control unit 180 can detect position information on a plurality of
For example, as shown in FIG. 7A, the TX electrode adjacent to the
The control unit 180 may then apply an electrical signal having a predetermined frequency (for example, the resonance frequency of the stylus pen 20) sequentially to the TX electrodes adjacent to the plurality of points . Specifically, the control unit 180 applies electrical signals sequentially to all of the plurality of
For example, as shown in FIG. 7A, when the TX electrodes adjacent to the plurality of
The control unit 180 controls the operation of the
The electrical signal associated with the electrical signal may be an electrical signal transmitted from the
For example, after an electrical signal is applied to TX3 among the TX electrodes TX2 and TX3 adjacent to the plurality of
In this case, the control unit 180 may determine that the
That is, when the electric signal related to the electric signal is received through the plurality of
If the TX electrodes adjacent to the plurality of points do not overlap (equal to each other), the controller 180 needs to determine the RX electrode to which the electrical signal related to the electrical signal among the plurality of
The controller 180 applies an electric signal to the first TX electrode TX2 among the TX electrodes adjacent to the plurality of
The controller 180 applies an electric signal to the second TX electrode TX3 of the TX electrodes adjacent to the plurality of
Meanwhile, in the
In this case, based on the RX electrode on which the electric signal related to the electric signal applied to the TX2 among the plurality of
7A, when the TX electrodes adjacent to the plurality of
Thereafter, the control unit 180 controls the
For example, as shown in FIG. 7B, when the TX electrode adjacent to the plurality of
The control unit 180 receives the electric signal related to the electric signal from RX3 and RX4 among the plurality of RX electrodes RX1 to RX4 and outputs the electric signal related to the electric signal to the
The control unit 180 may also connect a
Hereinafter, a second embodiment for identifying a target object to which a plurality of touches are applied when a plurality of touches are simultaneously applied to the
The second embodiment, which will be described below, is not limited to applying sequentially electrical signals to the TX electrodes adjacent to the plurality of points in accordance with the passage of time, Which is different from the first embodiment described above.
Here, the application of the electric signal to the TX electrodes adjacent to the plurality of points simultaneously (or simultaneously) is not limited to the case where the electrical signals are simultaneously applied to the TX electrodes at any one time, Signals may be applied together.
First, the control unit 180 can detect position information on a plurality of
For example, as shown in FIG. 8A, the TX electrode adjacent to the
When a touch is applied at the plurality of
The control unit 180 applies electrical signals having different phases to the TX electrodes TX2 and TX4 adjacent to the plurality of
Specifically, the controller 180 may apply electric signals having different phases to the TX electrodes TX2 and TX4 adjacent to the plurality of
For example, an electrical signal having a first phase is applied to the first TX electrode TX4 of the TX electrodes TX2 and TX4 adjacent to the plurality of
When the electric signal related to the electric signal is received from at least one of the plurality of RX electrodes after the electrical signal having the different phases is applied to the TX electrodes, The point touched by the stylus pen can be detected based on the phase.
Here, the RX electrode on which the electric signal related to the electrical signal is received may be independent of the RX electrode of the plurality of RX electrodes when detecting the touched point by the stylus pen. In the present invention, a point touched by the stylus pen is detected based on the phase of an electric signal (electric signal received from the stylus pen) related to the electric signal.
For example, as shown in FIG. 8A, an electrical signal having a first phase is applied to a first TX electrode TX4 adjacent to a
In this case, on the basis of reception of the electrical signal having the second phase, the control unit 180 generates a
In addition, the control unit 180 determines whether or not a
In the present invention, when at least two TX electrodes among the TX electrodes adjacent to a plurality of points are adjacent to each other, an electric signal having the different phases may be applied to the plurality of
Specifically, when at least two TX electrodes among the TX electrodes adjacent to the plurality of points are adjacent to each other, the control unit 180 controls the at least two TX electrodes so that the electrical signals having the different phases are not simultaneously applied And the electric signals having the different phases may be applied to the plurality of TX electrodes according to a predetermined method.
More specifically, the plurality of TX electrodes include sequentially disposed first to fourth TX electrodes, and when the adjacent at least two TX electrodes are the second and third TX electrodes of the first to fourth TX electrodes , The controller 180 may apply an electrical signal having the different phase to the first and third TX electrodes or apply an electrical signal having the different phases to the second and fourth TX electrodes .
If the
Accordingly, when at least two TX electrodes among the TX electrodes adjacent to the plurality of points are adjacent to each other, the control unit 180 controls the electric power to be applied to the adjacent at least two TX electrodes, A signal can be applied to a plurality of TX electrodes.
8B, when the TX electrodes adjacent to the plurality of
As another example, the control unit 180 may apply an electrical signal having a first phase to TX4 and an electrical signal having a second phase to TX2.
The two
The controller 180 applies an electrical signal having a first phase to one of the TX electrodes and applies an electrical signal having the second phase to another TX electrode not adjacent to the one of the TX electrodes, The position touched by the
When at least two of the TX electrodes adjacent to the plurality of points are adjacent to each other, the controller 180 controls the electric signal (an electric signal related to an electric signal having a different phase applied to the TX electrode, Can be determined based on the RX electrode to be sensed by the
8B, when the TX electrodes adjacent to the plurality of
When an electric signal having a first phase is applied to TX3 and an electric signal having a second phase is applied to TX1 and then an electric signal having a first phase is received through at least one of RX3 and RX4, Determines a point (810b) closest to the TX3 having the first phase and the RX3 and RX4 receiving the electric signal having the first phase as a point touched by the stylus pen (20) The
That is, in the present invention, at least two TX electrodes among the TX electrodes adjacent to the plurality of points are adjacent to each other, and a
Accordingly, when at least two TX electrodes among the TX electrodes adjacent to the plurality of points are adjacent to each other, the controller 180 controls the electric signal (the electric signal related to the electric signal having the different phase applied to the TX electrode, Is determined based on the RX electrode on which the
When the TX electrodes adjacent to a plurality of points are overlapped, it is possible to apply the same or similar analogy to the description of FIG. 7B.
In order to supply an electric signal to the
As described above, according to the present invention, it is possible to transmit and receive electric signals with the stylus pen using the existing touch panel. Therefore, it is not necessary to provide a separate power supply device formed of a coil, so that the cost can be reduced and the thickness of the mobile terminal can be made thinner.
In addition, the present invention can supply an electric signal to the stylus pen through a capacitive coupling and apply a touch to the touch panel through an electric signal generated in a resonance state. Therefore, the present invention can provide a stylus pen having no separate power source unit and composed of simpler circuits, thereby reducing cost and making the weight of the stylus pen lighter.
Further, in the present invention, when a touch is applied to the touch panel, the touch panel electrode adjacent to the point where the touch is applied can be used to determine whether the object subjected to the touch is a stylus pen. Therefore, according to the present invention, there is provided a control method of using a touch panel electrode adjacent to a point where a touch is applied to determine whether a target object to which the touch is applied is an object other than a stylus pen or a stylus pen (for example, a finger) .
According to another aspect of the present invention, there is provided a touch panel including a plurality of points, wherein when a plurality of touch points are simultaneously applied to a touch panel, electrical signals having different phases are simultaneously applied to touch panel electrodes adjacent to the plurality of points, It is possible to improve the speed at which the touch point is detected by the stylus pen.
The above description is applicable not only to a mobile terminal but also to a touch panel capable of sensing a touch using a capacitive method and a device having a stylus pen described with reference to FIGS. 2A and 2B (for example, a digital TV, a desktop computer, Digital signage, refrigerator, and the like).
The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). Also, the computer may include a control unit 180 of the terminal. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.
Claims (15)
A touch panel having a plurality of touch panel electrodes;
A stylus pen formed to transmit and receive an electric signal with the touch panel using a capacitive coupling; And
And a controller for determining whether the target object to be touched is the stylus pen by using a touch panel electrode adjacent to a point where the touch is applied among the plurality of touch panel electrodes when a touch is applied to the touch panel.
The touch panel includes:
A plurality of TX electrodes; And
And a plurality of RX electrodes arranged to cross the TX electrodes,
Wherein,
Detecting a point at which the touch panel is touched by using at least one of the plurality of TX electrodes and the plurality of RX electrodes,
Wherein the determination is performed by applying an electrical signal having a predetermined frequency to the TX electrode adjacent to the detected point among the plurality of TX electrodes based on the detected point.
Wherein,
And when the electric signal related to the electric signal is received by at least one of the plurality of RX electrodes after applying the electric signal to the TX electrode adjacent to the detected point, the object to which the touch is applied is determined to be the stylus pen .
The predetermined frequency is a resonance frequency of an LC circuit provided in the stylus pen,
Wherein the electrical signal associated with the electrical signal comprises:
Wherein the mobile terminal has the resonance frequency and is an electrical signal emitted from the stylus pen.
Wherein,
Wherein when a touch is applied at a plurality of points on the touch panel, an electric signal having the preset frequency is applied to at least one TX electrode adjacent to each of the plurality of points, And detecting a point of the mobile terminal.
Wherein,
Sequentially applying the electric signal to the TX electrodes adjacent to the plurality of points according to a time,
Wherein a point touched by the stylus pen is detected based on a time point at which at least one of the plurality of RX electrodes receives an electric signal related to the electric signal.
If the TX electrodes adjacent to the plurality of points are any one TX electrode,
Wherein,
Wherein a point touched by the stylus pen is detected based on an RX electrode on which an electrical signal related to the electrical signal is received among the plurality of RX electrodes.
Wherein,
Wherein the touch point detecting unit detects a point touched by the stylus pen by applying an electric signal having a different phase to each of the TX electrodes adjacent to the plurality of points.
An electrical signal having a first phase is applied to a first one of the TX electrodes adjacent to the plurality of points,
And an electrical signal having a second phase different from the first phase is applied to a second TX electrode different from the first TX electrode among the TX electrodes adjacent to the plurality of points.
Wherein the electrical signals having different phases are simultaneously applied to the TX electrodes adjacent to the plurality of points.
If at least two of the TX electrodes adjacent to the plurality of points are adjacent to each other,
Wherein the controller applies the electrical signals having the different phases to the plurality of TX electrodes according to a predetermined method so that electrical signals having the different phases are not simultaneously applied to the adjacent at least two TX electrodes .
The plurality of TX electrodes include first through fourth TX electrodes sequentially arranged,
When the adjacent at least two TX electrodes are the second and third TX electrodes of the first to fourth TX electrodes,
Wherein the controller applies an electrical signal having the different phase to the first and third TX electrodes or applies an electrical signal having the different phases to the second and fourth TX electrodes. terminal.
Wherein,
Wherein when the electric signals having different phases are applied to the TX electrodes and the electric signals related to the electric signals are received from at least one of the plurality of RX electrodes, And detects a point touched by the mobile terminal.
Detecting a point where the touch is applied when a touch is applied to the touch panel of the mobile terminal; And
And determining whether the target object to which the touch is applied is the stylus pen using a touch panel electrode adjacent to a point where the touch is applied among a plurality of touch panel electrodes included in the touch panel.
Wherein the determining comprises:
When an electric signal related to the electric signal is received by at least one of the plurality of touch panel electrodes after applying an electric signal having a predetermined frequency to the touch panel electrode adjacent to the point where the touch is applied, And determining that the mobile terminal is a pen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150053867A KR20160123615A (en) | 2015-04-16 | 2015-04-16 | Mobile terminal comprising a stylus pen and a touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150053867A KR20160123615A (en) | 2015-04-16 | 2015-04-16 | Mobile terminal comprising a stylus pen and a touch panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20160123615A true KR20160123615A (en) | 2016-10-26 |
Family
ID=57251987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150053867A KR20160123615A (en) | 2015-04-16 | 2015-04-16 | Mobile terminal comprising a stylus pen and a touch panel |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20160123615A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101947027B1 (en) | 2017-08-11 | 2019-02-12 | 임경해 | Stylus having a function of changing its thickness and length |
| KR101947029B1 (en) | 2017-08-11 | 2019-02-12 | 임경해 | Stylus having a function of changing its thickness and length |
| CN114442842A (en) * | 2020-11-06 | 2022-05-06 | 株式会社日本显示器 | Input detection system and input support device |
-
2015
- 2015-04-16 KR KR1020150053867A patent/KR20160123615A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101947027B1 (en) | 2017-08-11 | 2019-02-12 | 임경해 | Stylus having a function of changing its thickness and length |
| KR101947029B1 (en) | 2017-08-11 | 2019-02-12 | 임경해 | Stylus having a function of changing its thickness and length |
| CN114442842A (en) * | 2020-11-06 | 2022-05-06 | 株式会社日本显示器 | Input detection system and input support device |
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