KR20170022382A - Method and device of controlling touch sensing display - Google Patents

Method and device of controlling touch sensing display Download PDF

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Publication number
KR20170022382A
KR20170022382A KR1020150117268A KR20150117268A KR20170022382A KR 20170022382 A KR20170022382 A KR 20170022382A KR 1020150117268 A KR1020150117268 A KR 1020150117268A KR 20150117268 A KR20150117268 A KR 20150117268A KR 20170022382 A KR20170022382 A KR 20170022382A
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South Korea
Prior art keywords
sensing
electrode pad
stylus
touch
electrical
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KR1020150117268A
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Korean (ko)
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KR101727589B1 (en
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윤일현
신형철
장홍재
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주식회사 센트론
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Priority to KR1020150117268A priority Critical patent/KR101727589B1/en
Publication of KR20170022382A publication Critical patent/KR20170022382A/en
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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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04106—Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection

Abstract

Disclosed is a control method and apparatus for a touch sensor capable of detecting both touch by a human touch and input by a stylus using a single touch sensor. A control method of a touch sensor using a plurality of electrode pads includes a first sensing period for sensing touch by body contact and a second sensing period for sensing an input by a stylus, sharing; Performing touch sensing by body contact in a first sensing period using an electrode pad; And performing input sensing and position sensing with a stylus in a second sensing period using an electrode pad.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and a device for controlling a touch sensor,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a control method of a touch sensor, and more particularly, to a control method and a control apparatus of a touch sensor capable of detecting both touch and stylus input by body contact.

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 input using the stylus is finer and more precise than the touch by the body touch, and the use of the various UIs makes the loading 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 input 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 detecting both touch by touching and input by a stylus. However, development of such a touch sensor has been demanded.

The present invention provides a control method and a control apparatus for a touch sensor capable of detecting both a touch by a body contact and an input by a stylus using a single touch sensor.

In particular, according to the present invention, an electrical signal is applied to an electrode pad to sense touch by body contact, and when an electrical signal applied to the electrode pad is stopped, an input by a stylus is detected using an electrical residual signal remaining in the stylus A control method and a control device for a touch sensor are provided.

In addition, the present invention provides a method and a control device for a touch sensor capable of distinguishing between touch data generated by body contact and data generated by a stylus in time while simultaneously sensing a touch by a body contact and an input by a stylus.

The present invention also provides a control method and a control apparatus for a touch sensor that can reduce power consumption required for input sensing by a body and a stylus.

Also, the present invention provides a control method and a control apparatus of a touch sensor that can simplify the structure and manufacturing process, shorten the manufacturing time, and reduce the manufacturing time.

In addition, the present invention provides a control method and a control device for a touch sensor that can contribute to the slimming down of the 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: sensing a first sensing period And time-sharing a second sensing interval for sensing an input by a stylus; Performing touch sensing by body contact in a first sensing period using an electrode pad; And performing input sensing and position sensing with a stylus in a second sensing period using an electrode pad.

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.

The first sensing period and the second sensing period may be time-divided in various manners according to the required conditions and design specifications. For example, in the touch sensor control period, the first sensing period may be arranged temporally before the second sensing period. In some cases, the first sensing period may be arranged later than the second sensing period. In this case, an electrical signal may remain in the stylus using an electrical signal applied to the electrode pad in the display control period. have. In addition, the present invention can be configured such that there is no temporal gap between the first sensing period and the second sensing period, but in some cases, a time gap between the first sensing period and the second sensing period It is also possible that it exists.

The method of sensing the touch by the body contact in the first sensing section using the electrode pad can be implemented in various ways according to the required conditions and design specifications. For example, a method of sensing a touch by a physical contact in a first sensing period using an electrode pad may be a self-capacitive method or a mutual-capacitance method, Can be detected. For example, performing touch sensing by body contact in a first sensing period using an electrode pad may include applying an electrical signal to the electrode pad, and applying an electrical characteristic value from the electrode pad while the electrical signal is applied to the electrode pad It is possible to detect whether or not the touch is caused by the body contact.

The sensing of the input by the stylus in the second sensing period may also be performed using an electrode pad rather than a separate touch sensor, It can be implemented in various ways according to design specifications. For example, in the present invention, it is possible to detect the input by the stylus by using the electrode pad under the condition of using the stylus of the usual frequency generating method. For example, the step of performing the input sensing and the position sensing by the stylus in the second sensing period using the electrode pad may be performed under the condition that the electrical signal applied to the electrode pad is blocked. More specifically, the step of performing input sensing and position sensing with a stylus in a second sensing period using an electrode pad may include intercepting an electrical signal applied to the electrode pad, blocking an electrical signal applied to the electrode pad And performing an input sensing and position detection by contact of the stylus by measuring the electrical characteristic value from the electrode pad while the electrical residual signal is being held in the stylus.

More specifically, a transmitter amplifier and a receiver amplifier, each of which can be connected to an electrode pad, are provided. In the step of performing touch sensing by a physical contact in a first sensing section using an electrode pad, Connecting the transmitter amplifier to the electrode pad, disconnecting the electrode pad and the receiver amplifier, and applying an electric signal to the electrode pad; And performing touch sensing by body contact using a change in an electrical characteristic value according to a change in the periphery of the electrode pad, wherein the sensing and inputting of the stylus- The sensing step may include sensing an electrical residual signal flowing from the electrode pad by blocking the electrode pad and the transmitter amplifier corresponding to the second sensing period and connecting the electrode pad and the receiver amplifier; And performing input sensing and position detection by the stylus using a change in the electrical characteristic value from the electrical residual signal.

For reference, the electrical residual signal remaining in the stylus due to the interruption of the electrical signal applied to the electrode pad can be understood as an electrical signal that can remain in the stylus as the electrical signal applied to the electrode pad is interrupted. For example, a driving voltage (e.g., a pulse voltage or an AC voltage) may be applied to the electrode pad in the first sensing period, and the driving voltage applied to the electrode pad is blocked in the second sensing period, A ring-down signal due to the ring-down signal may remain. Also, it can be understood that the driving voltage applied to the electrode pad is interrupted, including a state in which the supply of the electric signal applied to the electrode pad is interrupted or the electrode pad is floating.

In addition, the electrode pads adjacent to each other among the plurality of electrode pads constituting the touch sensor may be grouped to form a plurality of electrode groups. In at least one of the first sensing period and the second sensing period, It is possible to detect the input by the body or the stylus.

According to another preferred embodiment of the present invention, the control device of the touch sensor includes a first sensing period for sensing a touch by body contact, and a second sensing period for sensing input by the stylus, A time-sharing section for time sharing; A signal supply unit for supplying an electric signal to the electrode pad in the first sensing period and interrupting the electric signal applied to the electrode pad in the second sensing period; In the first sensing period, while the electrical signal is applied to the electrode pad, the electrical characteristic value is measured from the electrode pad to detect whether or not the touch is caused by the body contact. In the second sensing period, And a touch sensing unit that measures an electrical characteristic value from the electrode pad and performs input sensing and position sensing by the stylus.

An electrical residual signal may remain in the stylus as the signal supplying unit interrupts the electrical signal applied to the electrode pad in the second sensing period, and the touch sensing unit may transmit the electrical characteristic value from the electrode pad while the electrical residual signal is maintained in the stylus It is possible to perform touch detection by touching the stylus. Here, the electrical residual signal may include a ring-down signal remaining in the stylus as the driving voltage applied to the electrode pad is cut off.

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 by using the single touch sensor.

In particular, according to the present invention, an electrical signal is applied to an electrode pad to sense a touch by body contact, and when an electrical signal applied to the electrode pad is stopped, an electrical residual signal remaining in the stylus is used to detect an input by a stylus can do. Therefore, it is not necessary to separately provide a touch sensor for sensing a touch by a body contact and a touch sensor for sensing an input by a stylus, and it is possible to detect all the inputs by the body and the stylus by using a single touch sensor It is possible.

Further, according to the present invention, it is possible to detect an input by a stylus by using a ring-down signal (electrical residual signal) remaining on the stylus without additionally applying an electric signal to detect input by the stylus It is possible to minimize the power consumption required for sensing input by the body and the stylus.

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 the touch data by the body contact and the data by the stylus can be classified in time, It can be used for various UIs.

1 is a view for explaining a method of controlling a touch sensor according to the present invention.
2 is a timing chart for explaining a method of controlling a touch sensor according to the present invention.
3 to 5 are views for explaining a touch sensor and a control method according to the present invention.
6 to 8 are views for explaining a method of controlling a touch sensor according to another embodiment of the present invention.
9 is a view for explaining a control apparatus for a touch sensor 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 method of controlling a touch sensor according to the present invention, and FIG. 2 is a timing diagram for explaining a method of controlling a touch sensor according to the present invention. 3 to 5 are views for explaining a touch sensor and a control method according to the present invention.

As shown in these figures, the control method of the touch sensor according to the present invention is characterized in that the control section of the electrode pad (see 110 in Fig. 3) is connected to the first sensing section for sensing touch by body contact and the input by the stylus A step S10 of performing time sharing with a second sensing period to detect a touch sensed by the user, a step S20 of performing touch sensing by a physical contact in a first sensing period using the electrode pad 110, (S30) of performing input sensing and position detection by the stylus in a second sensing interval using the sensing unit 110. [

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, the control period of the electrode pad 110 is time-shared by a first sensing period for sensing touch by body contact and a second sensing period for sensing input by a stylus.

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 sensing period and a second sensing 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 is connected to the external touch input And a touch input by the touch panel).

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

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

Next, the touch by the body contact is sensed in the first sensing section using the electrode pad 110.

The method of sensing the touch by the body contact in the first sensing period using the electrode pad 110 can be implemented in various ways according to the required conditions and design specifications. For example, a method of sensing a touch by body contact in the first sensing section using the electrode pad 110 may be a self-capacitance method or a mutual-capacitance method, It is possible to detect a touch by the touch panel.

For example, referring to FIG. 4, in the step of sensing the touch by the physical contact in the first sensing period using the electrode pad 110, an electric signal is applied to the electrode pad 110, It is possible to measure the electrical characteristic value from the electrode pad 110 while the electrical signal is applied to the pad 110, thereby performing the touch sensing by the body contact.

A switch may be provided in the wiring connecting the electrode pad 110 and the touch sensing circuit 300. In the first sensing period, the electrode pad wiring may be connected to the TX (transmitter) wiring, 110 may be supplied with an electric signal.

More specifically, a transmitter amplifier and a receiver amplifier, which are respectively connectable to the electrode pads 110, are provided. In the step of performing touch sensing by body contact in the first sensing section using the electrode pads 110, 1, connecting the electrode pad 110 and the transmitter amplifier in response to the sensing period, blocking the electrode pad 110 and the receiver amplifier, and applying an electric signal to the electrode pad 110; And performing touch sensing by body contact using a change in an electrical characteristic value according to a change in the periphery of the electrode pad 110. [

In the present invention, when an electric signal is applied to the electrode pad 110 in the first sensing period, it can be understood that a normal pulse voltage and an AC voltage, which are types of voltage signals, are applied. In some cases, 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.

The electric characteristic value measured from the electrode pad 110 during the application of the electric signal to the electrode pad 110 in the first sensing period may be a measurement of the electrical characteristic 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, an example in which 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 will be described. In some cases, the electric charge value may be used as an electrical characteristic value measured from the electrode pad while an electric signal is applied to the electrode pad.

Next, the stylus input is sensed in the second sensing period using the electrode pad 110.

The input sensing by the stylus in the second sensing period may also be performed using the electrode pad 110 rather than a separate touch sensor. In the second sensing period, The manner in which the input is sensed can be implemented in a variety of ways depending on the required conditions and design specifications. For example, in the present invention, it is possible to detect the input by the stylus by using the electrode pad 110 under the condition of using the stylus of the usual frequency generating method.

Hereinafter, the step of performing the input sensing and the position sensing by the stylus in the second sensing period using the electrode pad 110 may be an example in which the electrical signal applied to the electrode pad 110 is blocked. I will explain it. In some cases, an electrical signal may be applied to the electrode pad in the step of performing input sensing and position sensing by the stylus in the second sensing period.

For example, referring to FIG. 5, the step of performing input sensing and position sensing using a stylus in the second sensing period using the electrode pad 110 may include sensing the electrical signal applied to the electrode pad 110 The electrical residual signal is removed from the electrode pad 110 while the electrical residual signal is being held by the stylus. The electrical residual signal may be removed from the electrode pad 110, And performing input sensing and position detection by touching the stylus.

In the second sensing period, the electrode pad wiring can be connected to the RX (receiver) wiring by the switch, and the electrical characteristic value can be measured from the electrode pad 110.

More specifically, a transmitter amplifier and a receiver amplifier connectable to the electrode pads 110 are provided. In the step of performing input sensing and position detection using a stylus in the second sensing section using the electrode pads 110, Detecting an electrical residual signal flowing from the electrode pad 110 by blocking the electrode pad 110 and the transmitter amplifier corresponding to the second sensing period and connecting the electrode pad and the receiver amplifier; And performing touch detection by the stylus 400 using a change in the electrical characteristic value from the electrical residual signal.

Here, the electrical residual signal remaining in the stylus due to the interruption of the electrical signal applied to the electrode pad 110 is an electrical signal that can remain in the stylus as the electrical signal applied to the electrode pad 110 is interrupted Can be understood. That is, if the stylus touches the electrode pad 110 while the electrical signal is being applied, the electrical signal can be transmitted from the electrode pad 110 to the stylus. If the electrical signal is blocked in this state, May remain.

For example, a driving voltage (for example, a pulse voltage or an AC voltage) may be applied to the electrode pad 110 in the first sensing period and a driving voltage applied to the electrode pad 110 is blocked in the second sensing period A ring-down signal due to the driving voltage may remain in the stylus, and as a result, in a state where the electric signal applied to the electrode pad 110 is blocked in the second sensing period, An electrical characteristic value is measured from the electrode pad 110 using a ring-down signal, and it is possible to detect whether or not the stylus touches the electrode.

Here, when the driving voltage applied to the electrode pad 110 is cut off, the supply of the electric signal to the electrode pad 110 is interrupted or the electrode pad 110 is floated . ≪ / RTI >

The electrical characteristic value measured from the electrode pad 110 while the electrical residual signal is held on the stylus refers to a measured value of the electrical characteristic that can be measured from the electrode pad 110, The present invention is not limited to or limited by the kind and characteristics of the catalyst. Hereinafter, an example will be described in which an electric characteristic value measured from the electrode pad 110 by the electrical residual signal is a value of a charge amount related to a signal intensity or a frequency.

6 to 8 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.

The power consumption and the computation amount may be increased in proportion to the increase in the number of the electrode pads 110 in the case of a method of sensing the touch by applying an electric signal to the electrode pad 110 and measuring the electrical characteristic value . For example, when the electrode pads 110 are provided in the form of a 10 * 8 matrix, since an electric signal is separately applied to the 80 electrode pads 110 and the electrical characteristic value is measured, the calculation amount and power consumption may increase have. However, when the electrode pads 110 adjacent to each other are grouped, the object to which the 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.

6 to 8, 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 sense the touch by applying an 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 enables a touch by the body contact and a touch by the stylus 400 to be sensed under various conditions. For example, in a first sensing period in which a touch by a physical contact is sensed, 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) In the second sensing period in which the input by the stylus is sensed, the plurality of electrode pads 110 included in the electrode group 200 may be electrically separated from each other to be regarded as individual electrodes (refer to FIG. 8). In some cases, a plurality of electrode pads included in the electrode group may be regarded as one electrode by being electrically connected to each other in the second sensing period for sensing the input by the stylus. In this case, You can configure the UI to work.

9 is a view for explaining a control apparatus for a touch sensor 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.

Referring to FIG. 9, the control device of the touch sensor according to the present invention includes a first sensing period for sensing touch by body contact, and a second sensing period for sensing input by the stylus, A time division unit for time division by time division; A signal supply unit for supplying an electric signal to the electrode pad 110 in the first sensing period and blocking an electric signal applied to the electrode pad 110 during the second sensing period; In the first sensing period, an electrical characteristic value is measured from the electrode pad 110 while the electrical signal is applied to the electrode pad 110 to perform touch sensing by the physical contact. In the second sensing period, the electrode pad 110 And a touch sensing unit that measures an electrical characteristic value from the electrode pad 110 and senses whether or not the stylus is input.

The signal controller may define a touch sensor control period, more specifically, a touch sensor control period as a first sensing period and a second sensing period, and the signal supplying unit may include a first sensing period and a second sensing period, As shown in FIG.

For reference, in the above-described embodiments of the present invention, the touch sensor control section is divided into only one first sensing section and only one second sensing section, but in some cases, It is also possible to divide the section and the second sensing section into a plurality of sections and alternately arrange them.

The electrical residual signal may remain in the stylus as the signal supply unit interrupts the electrical signal applied to the electrode pad 110 in the second sensing period, It is possible to measure the electrical characteristic value from the touch sensor 110 and perform touch sensing by touching the stylus. Here, the electrical residual signal may include a ring-down signal remaining in the stylus as the driving voltage applied to the electrode pad 110 is cut off.

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

Claims (12)

A method of controlling a touch sensor using a plurality of electrode pads,
Time sharing a control period of the electrode pad with a first sensing period for sensing touch by body contact and a second sensing period for sensing input by a stylus;
Performing touch detection by body contact in the first sensing section using the electrode pad; And
Performing input sensing and position sensing using a stylus in the second sensing period using the electrode pad;
And a control unit for controlling the touch sensor. The method according to claim 1,
In the step of sensing the touch by the physical contact in the first sensing section using the electrode pad,
Wherein an electric signal is applied to the electrode pad and an electric characteristic value is measured from the electrode pad while the electric signal is applied to the electrode pad to detect whether or not the touch is caused by body contact. Control method. 3. The method of claim 2,
Wherein the electrical characteristic value includes a charge amount value or a capacitance value. 3. The method of claim 2,
Wherein the step of performing input sensing and position sensing with the stylus in the second sensing section using the electrode pad is performed under a condition that the electrical signal applied to the electrode pad is cut off. Way. 5. The method of claim 4,
Wherein the step of performing input sensing and position sensing using the stylus in the second sensing period using the electrode pad comprises:
Blocking the electrical signal applied to the electrode pad;
Leaving an electrical residual signal on the stylus as the electrical signal applied to the electrode pad is cut off; And
Measuring an electrical characteristic value from the electrode pad while the electrical residual signal is held in the stylus to perform input sensing and position detection by contact of the stylus;
And a control unit for controlling the touch sensor. 6. The method of claim 5,
Wherein the electrical residual signal includes a ring-down signal remaining in the stylus as a driving voltage applied to the electrode pad is cut off. 6. The method of claim 5,
Wherein the electrical characteristic value includes a charge amount value. The method according to claim 1,
A transmitter amplifier and a receiver amplifier connectable to the electrode pads are provided,
Wherein the step of performing touch sensing by physical contact in the first sensing section using the electrode pad comprises:
Connecting the electrode pad and the transmitter amplifier in response to the first sensing interval, blocking the electrode pad and the receiver amplifier, and applying the electric signal to the electrode pad; And performing touch sensing by body contact using a change in an electrical characteristic value according to a change in the periphery of the electrode pad,
Wherein the step of performing input sensing and position sensing using the stylus in the second sensing period using the electrode pad comprises:
Disconnecting the electrode pad and the transmitter amplifier corresponding to the second sensing period and connecting the electrode pad and the receiver amplifier to sense an electrical residual signal flowing from the electrode pad; And performing input sensing and position sensing with a stylus using a change in an electrical characteristic value from the electrical residual signal. The method according to claim 1,
The control period of the electrode pad is time-shared with the display control period and the touch sensor control period according to the frame time,
Wherein the touch sensor control section is divided into the first sensing section and the second sensing section. A control apparatus for a touch sensor using a plurality of electrode pads,
A section controller for temporally sharing the control section of the electrode pad with a first sensing section for sensing touch by body contact and a second sensing section for sensing input by a stylus;
A signal supply unit for supplying an electric signal to the electrode pad in the first sensing period and for blocking the electric signal applied to the electrode pad in the second sensing period;
In the first sensing period, an electrical characteristic value is measured from the electrode pad while the electrical signal is applied to the electrode pad to perform touch sensing by body contact, and in the second sensing period, A touch sensing unit for measuring an electrical characteristic value from the electrode pad while the electrical signal is interrupted and performing input sensing and position sensing with the stylus;
And a controller for controlling the touch sensor. 11. The method of claim 10,
Wherein the electrical residual signal remains in the stylus as the signal supply unit interrupts the electrical signal applied to the electrode pad in the second sensing period,
Wherein the touch sensing unit measures an electrical characteristic value from the electrode pad while the electrical residual signal is held in the stylus and performs input sensing and position sensing based on contact of the stylus. 12. The method of claim 11,
Wherein the electrical residual signal includes a ring-down signal remaining in the stylus as the driving voltage applied to the electrode pad is cut off.
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