KR101678059B1 - Method of controlling touch sensor and stylus device - Google Patents

Method of controlling touch sensor and stylus device Download PDF

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Publication number
KR101678059B1
KR101678059B1 KR1020150141193A KR20150141193A KR101678059B1 KR 101678059 B1 KR101678059 B1 KR 101678059B1 KR 1020150141193 A KR1020150141193 A KR 1020150141193A KR 20150141193 A KR20150141193 A KR 20150141193A KR 101678059 B1 KR101678059 B1 KR 101678059B1
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South Korea
Prior art keywords
signal
electrical signal
stylus
electrode pad
electrical
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KR1020150141193A
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Korean (ko)
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윤일현
신형철
장홍재
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주식회사 센트론
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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
    • G06F3/041—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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

A touch sensor control method using a plurality of electrode pads includes: a step of applying a first electric signal to an electrode pad; a step of receiving a second electric signal with a pattern opposite to a pattern of the first electric signal from a stylus in order to amplify a change in an electric characteristic value caused by the first electric signal while the first electric signal is being applied; and a step of performing pressure sensing and location detection caused by the stylus by using the electric characteristic value amplified by the second electric signal.

Description

TECHNICAL FIELD [0001] The present invention relates to a touch sensor control method and a control method of a stylus,

The present invention relates to a touch sensor control method and a stylus control method. More particularly, the present invention relates to a touch sensor control method and a stylus control method that can detect both touch by touching and stylus touch.

2. Description of the Related Art Generally, a touch panel such as a touch screen or a touch electrode pad is widely used in personal portable terminals because of its high space utilization and convenient use.

The touch panel can be largely classified into a capacitive type, a pressure type resistive type, an infrared ray detection type, and a surface ultrasonic type. Of these, a capacitive type touch panel is recently attracting attention.

In recent years, various attempts have been made to integrate a touch sensor so as to contribute to a slimmer, light-weighted, and minimized border (bezel-less) of a touch panel in accordance with consumer needs.

For reference, integration of the touch sensor can be largely divided into an in-cell type or an on-cell type according to a target (a display panel or a cover glass) to which the touch sensor is integrated.

As one of the in-cell methods, AIT (Advanced In-cell Touch) technology is a touch technology in which a touch sensor is built in an LCD cell, which can provide better touch sensitivity and reduce the panel thickness and width of the bezel, Are widely used because of the advantages that can be realized.

Meanwhile, in recent years, a variety of terminals employing a stylus function have been introduced to meet the needs of rapidly changing users. The touch using the stylus is possible to perform a fine and precise touch operation compared to the touch by the body contact, and the use of the various UI makes the use of the stylus function become popular.

However, since a touch sensor for sensing a touch by a body contact and a touch sensor for sensing a touch by a stylus (touch pen) have to be separately provided, the structure is complicated and inevitably the thickness of the terminal is increased There is a problem that the production cost is increased and the production time is delayed.

Recently, a variety of studies have been conducted to simplify the structure and manufacturing process of a touch sensor capable of sensing both touch by a physical contact and touch by a stylus, but development of such a touch sensor is still required.

The present invention provides a touch sensor control method, a stylus control method, and an input control device capable of sensing both a touch by a body contact and a touch by a stylus using a single touch sensor.

More particularly, the present invention relates to a touch sensor capable of detecting a change in an electrical characteristic value of an electrode pad and sensing input by a stylus while a second electrical signal having a pattern opposite to a first electrical signal applied to the electrode pad is sensed, A control method, a stylus control method, and an input control apparatus are provided.

In addition, the present invention provides a touch sensor control method, a stylus control method, and an input control device capable of effectively amplifying a first electric signal necessary for sensing an input by a stylus and improving recognition performance and stability of the stylus do.

In addition, the present invention provides a touch sensor control method, a stylus control method, and an input control device capable of detecting a change in an electrical characteristic value of an electrode pad to determine whether the touch is a touch or a stylus input.

The present invention also relates to a touch sensor control method and stylus control method and input control device capable of distinguishing touch data by body contact and data by stylus input while simultaneously sensing touch by a body contact and input by a stylus to provide.

In addition, the present invention provides a touch sensor control method, a stylus control method, and an input control device that can simplify a structure and a manufacturing process, shorten a manufacturing time, and reduce a manufacturing time.

In addition, the present invention provides a touch sensor control method, a stylus control method, and an input control device that can contribute to slimming down a touch sensor.

According to another aspect of the present invention, there is provided a method of controlling a touch sensor using a plurality of electrode pads, the method comprising: applying a first electrical signal to an electrode pad; Sensing a second electrical signal having a pattern opposite to the first electrical signal from the stylus to amplify a change in the electrical characteristic value by the first electrical signal while the signal is being applied, And measuring an electrical characteristic value amplified by the second electrical signal from the electrode pad to perform input sensing and position sensing by the stylus.

For reference, the touch sensor according to the present invention may be provided in a conventional in-cell or on-cell manner, or may be attached to an outer surface (or inner surface) of a cover glass, And the present invention is not limited or limited by the manner of providing the touch sensor.

Various signals can be applied as the first electrical signal to the electrode pad according to the required conditions and design specifications. For example, a normal pulse voltage or an AC voltage, which is a kind of a voltage signal, may be applied to the electrode pad. It is also possible that another electric signal such as a pulse current, an AC current or the like is applied to the electrode pad in some cases.

In addition, the second electrical signal can be provided in various ways depending on the required conditions and design specifications. For example, the second electrical signal may be generated using energy generated from a battery or an energy harvesting part of the stylus, or may be generated using a driving signal (e.g., a pulse voltage, an AC voltage, A ring-down signal remaining in the stylus may be used as the signal is cut off (pulse current or AC current).

In addition, the electrical characteristic value measured from the electrode pad in the present invention means a measured value of the electrical characteristic that can be measured from the electrode pad according to the input by the touch or the stylus by the body contact, The present invention is not limited to or limited by the kind and the characteristics. In one example, the electrical measurement value may include a charge amount value, a current amount value, or a capacitance value.

In the present invention, since the change of the electrical characteristic value is measured from the electrode pad to detect both the touch and the stylus input by the body contact, it is determined whether the change of the electrical characteristic value measured from the electrode pad is due to the touch by the body contact, And a step of determining whether or not the determination is made based on the result of the determination.

A method of determining whether a change in the electrical characteristic value measured from the electrode pad is due to touch by physical contact or by a stylus input can be implemented in various ways according to required conditions and design specifications. For example, the step of determining whether a change in an electrical characteristic value measured from the electrode pad is due to a touch by a physical contact or a stylus input may include determining whether a first pattern electrical signal is applied to an electrode pad A first signal period and a second signal period to which a second pattern electrical signal having orthogonality with the first pattern electrical signal is applied, the method comprising the steps of: time sharing a first signal period and a second signal period Determining that a stylus input has been performed when a change in an electrical characteristic value is measured in any one of the first signal period and the second signal period and determining that a stylus input has been performed if a change in an electrical characteristic value is measured in both the first signal period and the second signal period Step < / RTI > Here, the first pattern electric signal and the second pattern electric signal have orthogonality. That is, when the first pattern electric signal and the second pattern electric signal are different in at least one of phase, frequency and code, . ≪ / RTI >

Also, the control period of the electrode pad may be time-divided into the display control period and the touch sensor control period with reference to the frame, and the touch sensor control period may be divided into the first signal period and the second signal period again.

Meanwhile, a preamble step is performed to match the second electrical signal and the first electrical signal applied to the electrode pad to have the same frequency and opposite phase before performing the input sensing and the position sensing by the stylus can do. Here, matching the second electrical signal with the first electrical signal applied to the electrode pad may be performed by varying the first electrical signal applied to the electrode pad corresponding to the second electrical signal (variable to have the same frequency and opposite phase) Or varying the second electrical signal in response to the first electrical signal applied to the electrode pad.

According to another preferred embodiment of the present invention, there is provided a method of controlling a touch sensor using a touch sensor including a plurality of electrode pads capable of sensing body contact and an active stylus corresponding to the touch sensor, Applying a first electrical signal to the pad, applying a second electrical signal to the stylus opposite to the first electrical signal to amplify a change in the electrical characteristic value by the first electrical signal, And measuring an electrical characteristic value amplified by the signal at the electrode pad to perform input sensing and position sensing by the stylus.

According to another preferred embodiment of the present invention, there is provided a touch sensor comprising: a touch sensor for supplying a first electrical signal to a plurality of electrode pads for sensing a physical contact; The method comprising the steps of sensing a second electrical signal from a stylus, applying a first electrical signal to a second electrical signal corresponding to a second electrical signal, Modifying the first electrical signal to have a pattern opposite to the signal and measuring the electrical characteristic value amplified by the second electrical signal at the electrode pad to perform input sensing and position sensing with the stylus.

In another preferred embodiment of the present invention, it may include determining whether a change in the electrical characteristic value measured from the electrode pad is due to touch by body contact or stylus input. For example, the step of determining whether a change in an electrical characteristic value measured from the electrode pad is due to a touch by a physical contact or a stylus input may include determining whether a first pattern electrical signal is applied to an electrode pad A first signal period and a second signal period to which a second pattern electrical signal having orthogonality with the first pattern electrical signal is applied, the method comprising the steps of: time sharing a first signal period and a second signal period A step of judging that a touch by a body contact is made when a change in an electrical characteristic value is measured in each of the first signal period and the second signal period and a step of determining that a stylus input is performed when a change in an electrical characteristic value is measured in either the first signal period or the second signal period . ≪ / RTI > Preferably, the first electrical signal and the second electrical signal have the same frequency and opposite phase to each other.

According to another preferred embodiment of the present invention, there is provided a method of controlling an active stylus corresponding to a touch sensor that supplies a first electrical signal to a plurality of electrode pads for sensing a physical contact, Applying a second electrical signal having a pattern opposite to the first electrical signal to amplify a change in the electrical characteristic value by the first electrical signal; The characteristic value is measured, and input detection and position detection by the stylus are performed. Preferably, the first electrical signal and the second electrical signal have the same frequency and opposite phase to each other.

According to another preferred embodiment of the present invention, the input control device includes: an electrode pad signal supply unit for supplying a first electric signal to an electrode pad; a first electric signal generating unit for amplifying a change in the electric characteristic value by the first electric signal; And an electrical characteristic value amplified by the second electrical signal while the second electrical signal is being sensed is measured from the electrode pad to detect input and output by the stylus, And a sensing unit for performing position detection. Preferably, the first electrical signal and the second electrical signal have the same frequency and opposite phase to each other.

The sensing unit may measure the electrical characteristic value from the electrode pad while the first electrical signal is applied to the electrode pad, thereby performing the touch sensing by the physical contact. In addition, since the sensing unit is configured to measure a change in the electrical characteristic value from the electrode pad to sense the touch and the stylus input by the body contact, it is possible to determine whether the change in the electrical characteristic value measured from the electrode pad is due to touch by body contact, And a discrimination unit for discriminating whether or not the discrimination result is based on the discrimination result.

The discriminator can determine whether the body or the stylus is input in various ways according to the required conditions and design specifications. For example, the control period of the electrode pad may include a first signal period in which a first pattern electrical signal is applied to an electrode pad, a second signal period in which a second pattern electrical signal having orthogonality with the first pattern electrical signal is applied, The determining unit may determine that the stylus input is performed when the electrical characteristic value change is measured in either the first signal period or the second signal period, and the first signal period and the second signal period may be determined. It can be judged that the touch by the physical contact is made when the change of the electrical characteristic value is measured in the second signal period.

According to the method and apparatus for controlling the touch sensor according to the present invention, it is possible to detect both the touch by the body contact and the input by the stylus using the electrode pad.

In particular, according to the present invention, while a second electrical signal having a pattern opposite to the first electrical signal applied to the electrode pad is sensed, a change in the electrical characteristic value amplified from the electrode pad is detected, Can be performed.

Further, according to the present invention, since the second electric signal having the same frequency and opposite phase as the first electric signal applied to the electrode pad is used, it is possible to effectively amplify the change of the electric characteristic value required for sensing the input by the stylus And the recognition performance and stability of the stylus can be improved.

In addition, according to the present invention, it is possible to detect a change in the electrical characteristic value of the electrode pad, and to detect all the input by the touch and the stylus by the body contact.

Further, according to the present invention, the structure and the manufacturing process can be simplified, the manufacturing time can be shortened, and the manufacturing time can be shortened.

In addition, according to the present invention, since both the body and the stylus input can be detected by using the single touch sensor, the touch sensor is formed to have a thin thickness compared to the structure in which a plurality of touch sensors are mounted for sensing input by the body and the stylus And it can contribute to the slimming of the touch sensor.

In addition, according to the present invention, it is possible to simultaneously detect the touch by the body contact and the input by the stylus in real time, and detect the change of the electrical characteristic value of the electrode pad to discriminate whether it is the touch by the body contact or the input by the stylus It is possible to do. Therefore, since the touch data by the body contact and the data by the stylus can be classified, it is possible to utilize the data by the stylus in various UIs.

1 is a view for explaining a method of controlling a touch sensor according to the present invention.
2 is a view for explaining a first electric signal and a second electric signal applied to the electrode pad, according to the present invention.
FIG. 3 is a view for explaining a step of discriminating touch and stylus input by body contact, according to the present invention.
4 to 7 are views for explaining a touch sensor and a control method according to the present invention.
8 to 10 are views for explaining a method of controlling a touch sensor according to another embodiment of the present invention.
11 is a diagram for explaining an input control apparatus according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments. For reference, the same numbers in this description refer to substantially the same elements and can be described with reference to the contents described in the other drawings under these rules, and the contents which are judged to be obvious to the person skilled in the art or repeated can be omitted.

FIG. 1 is a view for explaining a control method of a touch sensor according to the present invention, FIG. 2 is a control method of a touch sensor according to the present invention, FIG. 3 is a view for explaining a step of discriminating touch and stylus input by body contact, and FIGS. 4 to 7 illustrate a touch sensor and a control method according to the present invention, Fig.

As shown in these drawings, a method of controlling a touch sensor according to the present invention includes the steps of (S10) applying a first electrical signal to an electrode pad (see 110 in FIGS. 2 and 5) Sensing (S20) a second electrical signal having a pattern opposite to the first electrical signal from the stylus (see 400 in FIG. 2) to amplify a change in the electrical characteristic value by the first electrical signal while the signal is being applied; And measuring an electrical characteristic value amplified by the second electrical signal while the second electrical signal is being sensed from the electrode pad 110 to perform input sensing and position sensing with the stylus 400 do.

For reference, the touch sensor according to the present invention may be provided in a conventional in-cell or on-cell manner or may be provided in a structure (Add-on) attached to an outer surface (or inner surface) of a cover glass And the present invention is not limited or limited by the manner in which the touch sensor is provided.

Hereinafter, an example in which the touch sensor according to the present invention is configured as an inscell type will be described. In general, the in-cell type touch sensor can commonly use the electrode pad 110 and the control line among the components of the screen output device. Here, the control line may be any one of a gate line (not shown) and a data line (not shown) for an image pixel. In addition, the image pixel means one pixel, i.e., one pixel unit, which is a group of RGB, and one data line and a gate line for 'R', 'G' and 'B' .

First, a first electric signal is applied to the electrode pad 110. Here, the application of the first electrical signal to the electrode pad 110 can be understood as applying a normal pulse voltage or AC voltage, which is a type of voltage signal, to the electrode pad 110, It is also possible that another first electrical signal such as a pulse current, an AC current, etc. is applied to the electrode pad.

Next, while the first electrical signal is applied to the electrode pad 110, a second electrical signal having a pattern opposite to the first electrical signal applied to the electrode pad 110 from the stylus 400 is sensed.

As the stylus 400, various active styluses capable of generating a second electric signal having a pattern opposite to the first electric signal may be used.

The second electrical signal generated from the stylus 400 and the first electrical signal applied to the electrode pad 110 have a pattern opposite to that of the first electrical signal, It can be understood that the first electrical signal and the second electrical signal have opposite characteristics so that they can be amplified. For example, the first electrical signal applied to the electrode pad 110 and the second electrical signal generated from the stylus 400 may have the same frequency and opposite phase to each other (see FIG. 2).

The second electrical signal can be provided from the stylus in a variety of ways depending on the required conditions and design specifications. For example, the second electric signal may be an electric signal generated from a battery or an energy harvesting part provided in the stylus, a driving signal applied to the stylus (e.g., a pulse voltage, an AC voltage, a pulse current, or AC Current signal to the stylus as it shuts off the current. For reference, the ring-down signal may be provided through a conventional stylus signal supply capable of providing a driving signal to the stylus separately from the electrode pad. For example, the stylus signal supply unit may include a wire loop that provides a driving signal in an area relatively larger than the electrode pad. More preferably, the wire loops can be disposed outside the display area along the periphery of the display area, which prevents electromagnetic interference by the wire loops, while providing drive signals of sufficient intensity and magnitude to the stylus .

Next, while the second electrical signal is being sensed, electrical characteristics are measured from the electrode pad 110, and input sensing and position sensing is performed by the stylus 400.

The electrical characteristic value measured from the electrode pad 110 during the sensing of the second electrical signal may be a measurement of the electrical characteristic that can be measured from the electrode pad 110 as the second electrical signal is sensed , And the present invention is not limited or limited by the kind and characteristics of the electrical measurement value. Hereinafter, as an electrical characteristic value measured from the electrode pad 110 as the second electric signal is sensed, a charge quantity value or a current quantity value related to the magnitude and frequency of the voltage, or the magnitude and frequency of the current, .

A first electrical signal is applied to the electrode pad 110 and a second electrical signal having the same frequency and opposite phase as the first electrical signal is sensed by the stylus 400, The electrical characteristic value measured from the electrode pad 110 may be measured while the first electrical signal and the second electrical signal are held, Can be performed.

As described above, according to the present invention, since the second electric signal transmitted from the stylus 400 has the same frequency and opposite phase as the first electric signal applied to the electrode pad 110, when the stylus 400 is brought into contact with the electrode pad 0.0 > 110 < / RTI > On the other hand, when the second electric signal has the same frequency and phase as the first electric signal applied to the electrode pad 110, even if the stylus 400 is contacted, the electric characteristic value measured from the electrode pad 110 changes The input of the stylus 400 can not be detected.

3 and 4, while the first electrical signal is applied to the electrode pad 110, the electrical property value may be measured from the electrode pad 110 to perform touch detection by body contact .

The method of measuring the electrical property value from the electrode pad 110 and sensing the touch sensation by the body contact can be implemented in various ways according to the required conditions and design specifications. For example, a method of measuring an electrical property value from the electrode pad 110 and sensing a touch by body contact may be a self-capacitive method or a mutual-capacitance method, Can be detected.

The electrical characteristic value measured from the electrode pad 110 as a body is contacted while the first electrical signal is applied to the electrode pad 110 is a measurement of electrical characteristics that can be measured from the electrode pad 110 , And the present invention is not limited or limited by the kind and characteristics of the electrical measurement value. Hereinafter, a capacitance value that can be used as touch data for the electrode pad 110 is used as an electrical characteristic value measured from the electrode pad 110 as the body is contacted. In some cases, the charge amount value may be used as the electrical characteristic value measured from the electrode pad as the body is contacted while the first electrical signal is applied to the electrode pad.

For reference, the transmitter circuit part of the touch sensing circuit 300 connected to the plurality of electrode pads 110 transmits a first electrical signal to the electrode pad 110, and at the same time, measures capacitances or charges, Can be performed simultaneously.

According to an embodiment of the present invention, a change in an electrical characteristic value measured from the electrode pad 110 is sensed by sensing the input of the touch and the stylus 400 by body contact, Or by inputting the stylus 400. In this case,

The method of determining whether the change in the electrical characteristic value measured from the electrode pad 110 is due to the touch by the body contact or the input of the stylus 400 can be implemented in various ways according to the required conditions and design specifications have. The step of determining whether a change in the electrical characteristic value measured from the electrode pad 110 is due to a touch by a physical contact or an input of a stylus 400 may include determining a control period of the electrode pad 110 as an electrode A first signal period in which a first pattern electrical signal is applied to the pad 110 and a second signal period in which a second pattern electrical signal having orthogonality with the first pattern electrical signal is applied, Determining that the input of the stylus 400 has been performed when the electrical characteristic value change is measured in any one of the first signal period and the second signal period, And determining that a touch by the physical contact is made when the change in the electrical characteristic value is measured.

Here, the first pattern electric signal and the second pattern electric signal have orthogonality. That is, when the first pattern electric signal and the second pattern electric signal have at least one of phase, frequency, and code, And the like.

Since the electrode pad 110 is used for display driving and touch sensing in the in-cell type touch panel, the control period of the electrode pad 110 is divided into a display control period and a touch sensor control period with respect to the frame And the touch sensor control period may be divided into a first signal period and a second signal period.

Here, the display control period may be understood as a period in which the electrode pad 110 is controlled to drive the display, and the touch sensor control period is a period in which the electrode pad 110 receives an external (body or stylus) input It can be understood as a section that is controlled to be detected.

The first signal period and the second signal period may be time-divided in various manners according to required conditions and design specifications. For example, in the touch sensor control section, the first signal section may be arranged temporally before the second signal section. In some cases, the first signal period may be arranged later than the second signal period on the touch sensor control period. In addition, in the exemplary embodiment of the present invention, there is no temporal gap between the first signal period and the second signal period. However, in some cases, the first signal period and the second signal period It is also possible that there is a temporal gap between them.

In addition, in the touch sensor control section, the first signal section and the second signal section may be time-divided so as to have the same time period. However, depending on the frequency characteristics, the first signal section and the second signal section It is also possible to time-divide the sections so that they have different time periods.

As described above, if a change in the electrical characteristic value is measured in both the first signal period and the second signal period, it can be determined that the touch by the physical contact is made.

For example, in the first signal period, a first pattern electrical signal is applied to the electrode pad 110, a second pattern electrical signal having orthogonality with the first pattern electrical signal is applied in the second signal period, and the stylus 400 A second electrical signal having the same frequency and opposite phase as the first pattern electrical signal can be sensed.

Referring to FIG. 6, in a case where a touch is made by physical contact, in both the first signal period and the second signal period, an electrical characteristic value (for example, ) Can be changed and the touch by the physical contact can be detected by measuring the change of the electrical characteristic value in the first signal period and the second signal period.

Referring to FIG. 7, when an input is made by the stylus 400, only a first signal period in which a first pattern electric signal having the same frequency and opposite phase as the second electric signal is applied is applied to the first pattern electric signal A change in an electrical characteristic value (for example, a charge amount) can be detected correspondingly, and the position detection by the stylus 400 can be performed by measuring a change in the electrical characteristic value in the first signal section. On the other hand, in the second signal period in which the second pattern electric signal having the same frequency and the same phase as the second electric signal is applied, the electric characteristic value does not change even if input is performed by the stylus.

For reference, in the embodiment of the present invention, a second electrical signal having the same frequency and opposite phase as the first pattern electrical signal is detected from the stylus, but in some cases, the second pattern electrical signal Various electrical signals having orthogonality with respect to the first pattern electrical signal can be used. Also, contrary to the present embodiment, by using the second pattern electric signal to have the same frequency and opposite phase as the second electric signal, and using the first pattern electric signal as an electric signal having orthogonality with the second pattern electric signal, And the detection of the position and the detection of the position may be performed in the second period.

In order to perform input sensing and position sensing by the stylus 400, it is preferable that the second electrical signal and the first electrical signal applied to the electrode pad 110 have the same frequency and opposite phase. To accomplish this, before the input sensing and position sensing by the stylus 400 is performed, the second electrical signal and the first electrical signal applied to the electrode pad 110 are matched to have the same frequency and opposite phase And may include a preamble step. In the stylus 400, the second electrical signal may be matched so that the first electrical signal and the second electrical signal have the same frequency and opposite phase.

The matching of the second electrical signal and the first electrical signal may be performed by varying the first electrical signal applied to the electrode pad 110 in response to the second electrical signal (variable to have the same frequency and opposite phase) And that the stylus 400 varies the second electrical signal corresponding to the first electrical signal applied to the electrode pad 110 as in the present embodiment.

8 to 10 are views for explaining a method of controlling a touch sensor according to another embodiment of the present invention. In addition, the same or equivalent portions as those in the above-described configuration are denoted by the same or equivalent reference numerals, and a detailed description thereof will be omitted.

In the case where the first electric signal is applied to the electrode pad 110 and the electric characteristic value is measured to detect whether the touch is input or whether the stylus 400 is input, the ratio of the number of the electrode pads 110 to the number of the electrode pads 110 Power consumption and computation amount may increase. For example, when the electrode pad 110 is provided in the form of a 10 * 8 matrix, the first electrical signal is applied to the 80 electrode pads 110 individually and the electrical characteristic value is measured. can do. However, when the electrode pads 110 adjacent to each other are grouped, the object to which the first electric signal is applied can be reduced, and the amount of calculation and power consumption can be reduced. In addition, when the electrode pads 110 are grouped, it is possible to employ various UIs depending on the situation.

8 to 10, among the plurality of electrode pads 110 constituting the touch sensor of the touch panel 100, the electrode pads 110 adjacent to each other are grouped into a plurality of electrode groups, (200) can be formed. For example, the 80 electrode pads 110 provided in the form of a 10 * 8 matrix may be grouped into four unit references (2 * 2 matrix form) to form a total of 20 electrode groups 200. In some cases, a plurality of electrode pads may be grouped in the form of a 10 * 1 matrix, a 1 * 8 matrix or other matrix to form an electrode group, and the present invention is not limited or limited by the form of the electrode group . Alternatively, it is possible that the adjacent electrode groups share some electrode pads.

A switch may be provided between the plurality of electrode pads 110 included in the specific electrode group 200 and the plurality of electrode pads 110 included in the specific electrode group 200 may be electrically connected to each other Connected or disconnected. When a plurality of electrode pads 110 included in a specific electrode group 200 are electrically separated from each other, a multiplexer 210 provided in each of the electrode groups 200 is divided into four groups Any one of the electrode pads 201 to 204 may be selectively connected to the output line.

In this way, when a plurality of electrode pads 110 included in the specific electrode group 200 are electrically connected, the specific electrode group 200 can be recognized as one electrode, and a total of 5 * 4 = 20 It is possible to detect whether the touch is made or whether the stylus 400 is inputted by applying the first electric signal to the electrode group 200. [ In this manner, unlike the method of sensing touch through 80 electrode pads 110, only 20 electrode groups 200 need to be detected, so that it is possible to reduce the amount of calculation and power consumption.

The method using the electrode group 200 allows the touching by the body contact and the function by the input by the stylus 400 to be performed in various ways. For example, when a plurality of electrode pads 110 included in the electrode group 200 are electrically connected to each other to be regarded as one electrode (refer to FIG. 7), a specific UI is executed by input by a body or a stylus, When a plurality of electrode pads 110 included in the electrode group 200 are electrically separated from each other to be regarded as individual electrodes (refer to FIG. 8), another UI can be configured to be executed by inputting by the body or the stylus .

11 is a diagram for explaining an input control apparatus according to the present invention. In addition, the same or equivalent portions as those in the above-described configuration are denoted by the same or equivalent reference numerals, and a detailed description thereof will be omitted.

11, an input control apparatus according to the present invention includes an electrode pad signal supply unit for supplying a first electrical signal to an electrode pad, an electrode pad signal supply unit for supplying a first electrical signal and a second electrical signal to amplify a change in an electrical characteristic value by the first electrical signal, A stylus signal generator for providing a second electrical signal having an opposite pattern, and an electrical characteristic value amplified by the second electrical signal while the second electrical signal is being sensed, And a detection unit for performing detection.

In addition, the sensing unit may measure the electrical characteristic value from the electrode pad while the first electrical signal is applied to the electrode pad, thereby performing the touch sensing by the physical contact.

Since the sensing unit is configured to measure a change in an electrical characteristic value from an electrode pad to sense touch and stylus input by body contact, it is possible to determine whether the change in the electrical characteristic value measured from the electrode pad is due to touch by body contact, And a discrimination unit for discriminating whether or not the discrimination is made.

The determination unit can determine whether the body or the stylus is input in various ways according to the required conditions and design specifications. For example, the control period of the electrode pad may include a first signal period in which a first pattern electrical signal is applied to an electrode pad, and a second signal period in which a second pattern electrical signal having orthogonality with the first pattern electrical signal is applied. The determination unit may determine that the stylus input is performed when the electrical characteristic value change is measured in any one of the first signal period and the second signal period, It can be judged that the touch by the physical contact is made when the change of the electrical characteristic value is measured in the section and the second signal section.

Although the present invention has been described with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims. It can be understood that

100: Panel 110: Electrode pad
200: electrode group 300: touch sensing circuit
400: Stylus 500: Stylus signal generator

Claims (8)

A method of controlling a touch sensor using a plurality of electrode pads,
Applying a first electrical signal to the electrode pad;
Receiving a second electrical signal having a pattern opposite to the first electrical signal from the stylus to amplify a change in the electrical characteristic value by the first electrical signal while the first electrical signal is applied to the electrode pad step; And
And performing input detection and position detection by the stylus using an electrical characteristic value amplified by the second electrical signal,
A control section for providing the first electric signal to the electrode pad to determine whether the change in the electrical characteristic value measured from the electrode pad is due to touch by body contact or by the stylus input, Time-sharing a first signal section to which an electrical signal is applied and a second signal section to which a second pattern electrical signal having orthogonality with the first pattern electrical signal is applied,
If it is determined that the touch is made by the physical contact when the electrical characteristic value change is measured in both the first signal period and the second signal period, When the value change is measured, it is determined that the stylus input is made,
Wherein the second electrical signal has the same frequency and opposite phase as one of the first pattern electrical signal and the second pattern electrical signal. The method according to claim 1,
Wherein the first electrical signal and the second electrical signal have the same frequency and opposite phases to amplify a change in the electrical characteristic value by the first electrical signal. delete The method according to claim 1,
Wherein the first pattern electric signal and the second pattern electric signal which are orthogonal to each other have at least one of a phase, a frequency and a code different from each other. The method according to claim 1,
A preamble step of matching the second electrical signal and the first electrical signal applied to the electrode pad so as to have the same frequency and opposite phase before performing the input detection and the position detection by the stylus, Further comprising the steps of: The method according to claim 1,
Wherein the second electrical signal is generated using energy generated from a battery or an energy harvesting part of the stylus. delete delete
KR1020150141193A 2015-10-07 2015-10-07 Method of controlling touch sensor and stylus device KR101678059B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102416400B1 (en) * 2021-06-23 2022-07-05 한지희 Non-contact touch pointer input device and non-contact touch system having the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120100780A (en) * 2011-03-02 2012-09-12 윈텍 주식회사 Touch pen
KR20140148156A (en) * 2013-06-21 2014-12-31 삼성전기주식회사 Stylus pen and touchscreen module

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120100780A (en) * 2011-03-02 2012-09-12 윈텍 주식회사 Touch pen
KR20140148156A (en) * 2013-06-21 2014-12-31 삼성전기주식회사 Stylus pen and touchscreen module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102416400B1 (en) * 2021-06-23 2022-07-05 한지희 Non-contact touch pointer input device and non-contact touch system having the same

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