KR101727590B1 - 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
KR101727590B1
KR101727590B1 KR1020150117269A KR20150117269A KR101727590B1 KR 101727590 B1 KR101727590 B1 KR 101727590B1 KR 1020150117269 A KR1020150117269 A KR 1020150117269A KR 20150117269 A KR20150117269 A KR 20150117269A KR 101727590 B1 KR101727590 B1 KR 101727590B1
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South Korea
Prior art keywords
stylus
sensing
electrode pad
signal
touch
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KR1020150117269A
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Korean (ko)
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KR20170022383A (en
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윤일현
신형철
장홍재
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주식회사 센트론
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Priority to KR1020150117269A priority Critical patent/KR101727590B1/en
Publication of KR20170022383A publication Critical patent/KR20170022383A/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. Providing a stylus signal supply for supplying a pen electrical signal to the stylus; 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 sensing by body contact in a first sensing period using an electrode pad; And supplying pen electrical signals from the stylus signal supply unit to perform input sensing and position detection using a stylus using the electrode pads in a second sensing period.

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 detect a touch by body contact, and when an electrical signal applied to the stylus is stopped through a stylus signal supply unit, A control method and a control apparatus for a touch sensor capable of detecting an input by a stylus by detecting a change in an electrical characteristic value are provided.

In addition, the present invention provides a control method and a control apparatus of a touch sensor capable of effectively providing a pen electric signal necessary for driving a stylus (for example, generating a frequency), and capable of enhancing recognition performance and stability of the stylus.

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.

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 a preferred embodiment of the present invention for achieving the objects of the present invention described above, there is provided a stylus signal supply apparatus for supplying stylus signal to a stylus, 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 sensing by body contact in a first sensing period using an electrode pad; And supplying pen electrical signals from the stylus signal supply unit to perform input sensing and position detection using a stylus using the electrode pads in a second sensing period.

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 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 a touch electrical signal to an electrode pad, The value can be measured to detect whether or not the touch is made 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, performing an input sensing and a position sensing using a stylus in a second sensing period using an electrode pad may include intercepting a pen electrical signal applied to the stylus signal supply and blocking a pen electrical signal applied to the electrode pad Condition. More specifically, in the step of receiving the pen electrical signal from the stylus signal supply unit and performing the input sensing and the position sensing using the stylus using the electrode pad in the second sensing period, the pen electrical signal applied to the stylus signal supplying unit and the electrode pad The method comprising the steps of intercepting a touch electrical signal applied to the stylus signal supply unit, retaining an electrical residual signal on the stylus as the pen electrical signal applied to the stylus signal supply unit is cut off, And performing input sensing and position sensing by touching the stylus.

In addition, the pen electrical signal applied to the stylus signal supply unit and the touch electrical signal applied to the electrode pad may be simultaneously applied or may be applied with a time difference. In some cases, it is also possible that the pen electrical signal supplied to the stylus signal supply unit is supplied while the display control signal is applied to the electrode pad to control the display.

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 a transmitter amplifier to the electrode pad, disconnecting the electrode pad and the receiver amplifier, and applying a touch 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 pen electrical signal applied to the stylus supply section can be understood as an electrical signal that can remain in the stylus as the pen electrical signal applied to the stylus supply section is interrupted have. For example, a driving voltage (e.g., a pulse voltage or an AC voltage) is applied to the electrode pad in the first sensing period and a driving signal (e.g., a pulse voltage, an AC voltage, a pulse current, or an AC current) And a ring-down signal due to the driving signal may remain in the stylus as the driving signal applied to the stylus signal supply unit is blocked in the second sensing period. In addition, it can be understood that the driving signal applied to the stylus supply section is blocked, including the state in which the supply of the pen electric signal applied to the stylus supply section is interrupted or the stylus supply section is floated.

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 embodiment of the present invention, the stylus may be provided with an energy harvesting part for storing the pen electrical signal supplied from the stylus signal supply part, and using an electric signal stored in the energy harvesting part The input sensing and position detection by the stylus can be performed in the second sensing period. As the energy harvesting part, a conventional circuit or element capable of storing the pen electric signal supplied from the stylus signal supply part can be used, and the present invention is not limited or limited by the kind and characteristics of the energy harvesting part.

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; An electrode pad signal supply unit for supplying a touch electric signal to the electrode pad in the first sensing period and interrupting the touch electric signal applied to the electrode pad in the second sensing period; A stylus signal supply unit for selectively supplying a pen electric signal to the stylus; In the first sensing period, an electrical characteristic value is measured from the electrode pad while the touch electrical signal is applied to the electrode pad, and the touch sensing is performed by the body contact. In the second sensing period, the pen electrical signal And a touch sensing unit for measuring an electrical characteristic value from the electrode pad while sensing the touch electrical signals applied to the electrode pads and performing input sensing and position sensing with the stylus.

An electrical residual signal may remain in the stylus as the pen electrical signal applied to the stylus signal supply unit is blocked in the second sensing period and the electrical sensing value may be measured from the electrode pad while the electrical residual signal is maintained in the stylus So that it is possible to perform touch sensing by touching the stylus. Here, the electrical residual signal may include a ring-down signal that remains in the stylus as it interrupts the driving signal applied to the stylus signal supply.

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.

Particularly, according to the present invention, a touch electrical signal is applied to an electrode pad to detect a touch by body contact, and an electrical residual signal remaining in the stylus as the pen electrical signal applied to the stylus is stopped through the stylus signal supply unit The input by the stylus can be detected by detecting the change in the electrical characteristic value of the electrode pad. 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 provide the pen electric signal necessary for the stylus driving in the region extended beyond the electrode pad through the stylus supply portion, so that the input recognition performance and stability by the stylus can be enhanced.

In addition, according to the present invention, when an input is sensed by a stylus, a ring-down signal (electrical residual signal) remaining in the stylus is used and a stylus Since it is possible to detect the input, it is possible to minimize the power consumption when detecting the 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.
10 to 14 are diagrams for explaining another embodiment of a method of controlling a touch sensor according to another embodiment of 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 drawings, a method of controlling a touch sensor according to the present invention includes the steps of providing a stylus signal supply unit for supplying a pen electric signal to a stylus (see 400 in FIG. 5) (S20) of time-sharing a control period of the touch pad (see 110 of FIG. 3) with a first sensing period for sensing touch by body contact and a second sensing period for sensing input by a stylus, (S30) of performing touch sensing by body contact in a first sensing period using the electrode pad 110, and performing input sensing and position sensing using a stylus in a second sensing period using the electrode pad 110 (S40).

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 stylus signal supply unit 500 for supplying a pen electric signal to the stylus 400 is provided.

As the stylus signal supplying unit 500, various signal supplying units capable of supplying a pen electric signal to the stylus 400 may be used. The present invention is not limited or limited by the type and characteristics of the stylus signal supplying unit 500. Preferably, the stylus signal supply 500 may be configured to provide a pen electrical signal in a region relatively larger than the electrode pad 110.

The stylus 400 is configured to receive a pen electrical signal from the stylus signal supply unit 500 and generate a specific frequency signal. The pen electrical signal supplied from the stylus signal supply unit 500 is supplied from the stylus 400 Various electrical signals that can generate a frequency can be used.

The stylus supply unit 500 supplies the pen electrical signal to the stylus 400 when the stylus supply unit 500 supplies the stylus 400 with a normal pulse voltage, It is also possible to supply the stylus supply unit 500 with other electrical signals to the stylus 400 in some cases.

Meanwhile, it is possible to supply a pen electric signal for operation to the stylus through the electrode pad. However, since the electrode pad is formed in a very small size, it is difficult to supply a sufficient pen electric signal to the stylus through the electrode pad. Therefore, it is preferable that the stylus signal supply unit 500 is configured to provide a pen electric signal in a relatively larger area than the electrode pad 110. Referring to FIG. 3, the stylus signal supply unit 500 may include a wire loop that provides a pen electrical signal in a relatively larger area than the electrode pad 110. More preferably, the wire loops can be disposed outside the display area 101 along the periphery of the display area 101, which prevents electromagnetic interference by the wire loops, So that the pen electrical signal of the stylus 400 can be supplied.

For reference, the wire loop may be formed of a conductor patterned on a display panel substrate (glass) with a conventional conductor (for example, metal or ITO) or provided outside the display, The present invention is not limited to or limited by the position.

In the above-described embodiment of the present invention, a single wire loop is used as a stylus signal supply unit, but in some cases it is also possible to provide a plurality of wire loops. In this case, of course, each divided wire loop may be configured to provide an electric signal in a region larger than the electrode pads.

Next, the control period of the electrode pad 110 is temporally divided into a first sensing period for sensing touch by body contact and a second sensing period for sensing an input by the 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 an interval in which the electrode pad 110 is controlled to drive the display, and the touch sensor control period may be defined as a period in which the electrode pad 110 is connected to the external touch input (body or stylus A touch input by a touch sensor 400).

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 on the touch sensor control 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 body contact in the first sensing period using the electrode pad 110, a touch electric signal is applied to the electrode pad 110, An electrical property value may be measured from the electrode pad 110 while the touch electric signal is applied to the electrode pad 110 to detect whether or not the touch is caused by physical 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, a touch electrical signal may be applied.

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, interrupting the electrode pad 110 and the receiver amplifier, and applying a touch 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. [

For reference, the transmitter circuit portion of the touch sensing circuit can simultaneously perform a touch sensing by the body by measuring the capacitance or the amount of electric charge while transmitting the touch electric signal to the electrode pad.

In addition, 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 or an AC voltage, which is a kind of voltage signal, is applied. It is also possible that another electric signal such as a current, an AC current or the like is applied to the electrode pad.

The electrical characteristic value measured from the electrode pad 110 during the application of the touch electrical signal to the electrode pad 110 in the first sensing period may be an electrical property value measured from the electrode pad 110 Means a measurement value, 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.

For example, in an embodiment of the present invention, a pen electrical signal is applied to the stylus signal supply unit during the touch detection by the physical contact in the first sensing period. In some cases, it is possible to apply a touch electric signal to the electrode pad and a pen electric signal to the stylus signal supply unit at a predetermined time difference.

Next, the stylus 400 receives the pen electrical signal from the stylus signal supply unit 500 and senses touch using the electrode pad 110 in the second sensing period.

The sensing of the touch by the stylus 400 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 of sensing the touch by the stylus 400 can be implemented in various ways according to 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 input sensing and position sensing using a stylus in the second sensing period using the electrode pad 110 may be performed by sensing a pen electrical signal applied to the stylus signal supplying unit 500 and a pen electric signal applied to the electrode pad 110 A description will be given of an example in which the operation is performed under the condition that the applied touch electric signal is blocked. In some cases, it is possible to apply a pen electric signal to the electrode pad in the step of performing the input sensing and the position sensing by the stylus in the second sensing period.

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 a pen electrical signal And a touch electrical signal applied to the electrode pad 110. The method may further include the steps of maintaining an electrical residual signal on the stylus 400 due to the interruption of the pen electrical signal applied to the stylus signal supply unit 500, And measuring an electrical characteristic value from the electrode pad 110 while the electrical residual signal is held in the stylus 400 to perform input sensing and position detection by contact of the stylus 400. [

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 400 due to the interruption of the pen electrical signal applied to the stylus signal supply unit 500 may be an electrical residual signal due to the interruption of the electrical signal applied to the stylus signal supply unit 500, Lt; RTI ID = 0.0 > 400, < / RTI > That is, when the stylus 400 is in contact with the stylus signal supply unit 500 while the pen electrical signal is being applied, an electrical signal can be transmitted from the stylus signal supply unit 500 to the stylus 400, When the electrical signal applied to the supply unit 500 is cut off, an electrical residual signal may remain in the stylus.

For example, a driving voltage (e.g., a pulse voltage or an AC voltage) is applied to the electrode pad 110 in the first sensing period and a driving signal (e.g., a pulse voltage, an AC voltage A ring-down signal (Ring-Down) generated by a driving signal is supplied to the stylus 400 as the driving signal applied to the stylus signal supply unit 500 is blocked in the second sensing period, signal is left in the second sensing period and the electrical signal to the electrode pad 110 is cut off and the electrical signal to the stylus signal supply unit 500 is cut off, The electrical characteristic value is measured from the electrode pad 110 by using the down signal and it is possible to detect whether or not the touch is caused by the contact of the stylus.

Here, the driving signal applied to the stylus signal supply unit 500 is interrupted when the supply of the electric signal to the stylus signal supply unit 500 is stopped or the stylus signal supply unit 500 is floating May be understood to include both.

The electrical characteristic value measured from the electrode pad 110 while the electrical residual signal is held in the stylus 400 refers to a measured value of the electrical characteristic that can be measured from the electrode pad 110, The present invention is not limited or limited by the kind and characteristics of the electrical measurement values. Hereinafter, an electric characteristic value measured from the electrode pad 110 by the electrical residual signal will be described as an example in which the magnitude of the voltage and the value of the electric charge associated with the frequency or the magnitude and frequency of the electric current are used.

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.

In the case of a method of sensing the touch by applying a touch electric signal to the electrode pad 110 and measuring the electrical characteristic value, the power consumption and the calculation amount may be increased in proportion to the increase of the number of the electrode pads 110 have. For example, when the electrode pad 110 is provided in the form of a 10 * 8 matrix, a touch electric signal is separately applied to the 80 electrode pads 110 and the electrical characteristic value is measured. . 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.

In the above-described embodiments of the present invention, the pen electrical signal supplied from the stylus signal supply unit is directly used to perform input detection and position detection by the stylus in the second sensing period. However, The stylus may be provided with an energy harvesting part for storing an electric signal supplied from the stylus signal supply part, and the electric signal stored in the energy harvesting part may be used to control the stylus Input detection and position detection can be performed.

As the energy harvesting part, a conventional circuit or element capable of storing the pen electric signal supplied from the stylus signal supplying part can be used, and the present invention is not limited or limited by the kind and characteristics of the energy harvesting part.

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; An electrode pad signal supply unit for supplying a touch electric signal to the electrode pad 110 in the first sensing period and blocking a touch electric signal applied to the electrode pad 110 during the second sensing period; A stylus signal supply unit for selectively supplying a pen electrical signal to the stylus; and an electrical characteristic value is measured from the electrode pad 110 while the touch electrical signal is applied to the electrode pad 110 in the first sensing period, The electrical characteristic value is measured from the electrode pad 110 while the pen electrical signal applied to the stylus signal supply unit and the touch electrical signal applied to the electrode pad 110 are cut off during the second sensing period And a touch sensing unit for performing input sensing and position sensing by the stylus.

The interval controller may define a touch sensor control period, more specifically, a touch sensor control interval as a first sensing interval and a second sensing interval, and the electrode pad signal supply unit may supply the electrode pad The stylus signal supply unit may selectively supply the pen electrical signal to the stylus in the first sensing period and the second sensing period.

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 pen electrical signal applied to the stylus signal supply unit is interrupted in the second sensing period, and the touch sensing unit may receive the electrical residual signal from the electrode pad 110 It is possible to measure whether or not the touch is sensed by touching the stylus by measuring the electrical characteristic value. Here, the electrical residual signal may include a ring-down signal remaining in the stylus as the driving signal applied to the stylus signal supply unit is cut off.

10 to 14 are diagrams for explaining another embodiment of 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 above-described embodiment of the present invention, an electric signal is applied to the electrode pad in the first sensing period and a driving signal is also applied to the stylus signal supply unit. However, in some cases, And the application of the drive signal to the stylus signal supply unit may be performed with a time difference.

Referring to FIG. 10, the touch sensor control section may be time-divided into a first sensing section (body sensing) and a second sensing section (stylus sensing), and the second sensing section may include a second- A section, and a second-B section where an electrical residual signal remains in the stylus.

In the first sensing period, a touch electric signal may be applied to the electrode pad. While the touch electric signal is applied to the electrode pad, an electrical characteristic value may be measured from the electrode pad to detect whether or not the touch is caused by body contact. On the other hand, in the first sensing period, the application of the driving signal to the stylus signal supply unit can be interrupted.

Then, in the second-A period of the second sensing period, the electrical signal to the electrode pad is cut off and a driving signal is applied to the stylus signal supplying unit. Next, in the second-B section of the second sensing period, the application of the driving signal to the stylus signal supply section can be interrupted. When the driving signal applied to the stylus signal supply section is blocked, the electrical residual signal remaining in the stylus is used It is possible to perform input detection and position detection by contact of the stylus.

11, the touch sensor control section may be time-divided by a first sensing section (body detection) and a second sensing section (stylus sensing). In the touch sensor control section, the first sensing section may be divided into a second sensing section It is possible to arrange it later in time.

First, a driving signal may be applied to the stylus signal supply unit during the second-A period of the second sensing period. On the other hand, in the second sensing period, the application of the touch electric signal to the electrode pad may be interrupted. Next, in the second-B section of the second sensing period, the application of the driving signal to the stylus signal supply section can be interrupted. When the driving signal applied to the stylus signal supply section is blocked, the electrical residual signal remaining in the stylus is used It is possible to perform input detection and position detection by contact of the stylus.

Thereafter, an electric signal may be applied to the electrode pad in the first sensing period, and an electrical characteristic value may be measured from the electrode pad while an electric signal is applied to the electrode pad, thereby detecting whether or not the touch is caused by the body contact.

Meanwhile, in the above-described embodiments of the present invention, the second sensing period for stylus sensing is separated from the display control period in terms of time. However, in some cases, the second sensing period may be temporally As shown in FIG.

Referring to FIG. 12, the touch sensor control section may be time-divided by a first sensing section (body sensing) and a second sensing section (stylus sensing). In the touch sensor control section, (Second-A) of the second sensing period may overlap with the display control period in terms of time.

A driving signal may be applied to the stylus signal supply unit during the second-A period of the second sensing period while the display control signal is applied to the electrode pad for controlling the display during the display control period. On the other hand, in the second sensing period, the electric signal to the electrode pad (electric signal for controlling the touch sensor) may be cut off. Next, in the second-B section of the second sensing period, the display control signal is intercepted and the driving signal applied to the stylus signal supply unit is interrupted. When the driving signal applied to the stylus signal supply unit is interrupted, And the position detection can be performed by touching the stylus by using the electrical residual signal.

Then, a touch electric signal may be applied to the electrode pad in the first sensing period, and an electrical characteristic value may be measured from the electrode pad while the electric signal is applied to the electrode pad, thereby detecting whether the touch is caused by the body contact .

In the above-described embodiments of the present invention, the first sensing period and the second sensing period are each performed once in the touch sensor control period, but in some cases, the first sensor period It is possible that the sensing period and the second sensing period are repeatedly performed.

Referring to FIG. 13, the touch sensor control period for each frame time can be divided into a first sensing period (body detection) and a second sensing period (stylus sensing). The first sensing period and the second sensing period It is possible that the interval is repeatedly performed a plurality of times in each frame.

14, the first sensing period and the second sensing period may be referred to as frame time (see FIG. 10) even when the second sensing period is time-divided into the second-A period and the second- It is possible to perform iteratively by a plurality of times.

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 supply

Claims (19)

A method of controlling a touch sensor using a plurality of electrode pads,
Providing a stylus signal supply for supplying a pen electrical signal to the stylus;
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
Receiving the pen electrical signal from the stylus signal supply unit and performing input sensing and position detection by the stylus using the electrode pad in the second sensing period,
In the step of performing touch sensing by body contact in the first sensing section using the electrode pad, a touch electric signal is applied to the electrode pad, and while the touch electric signal is applied to the electrode pad, By measuring the electrical characteristic value from the pad, it is possible to detect whether or not the touch is caused by the body contact,
Wherein the step of receiving the pen electrical signal from the stylus signal supply unit and performing the input sensing and the position sensing by the stylus using the electrode pad in the second sensing period includes sensing the pen electrical signal And cutting off the touch electric signal applied to the electrode pad. The method according to claim 1,
Wherein the stylus signal supply unit includes a wire loop for providing the pen electrical signal in an area relatively larger than the electrode pad. 3. The method of claim 2,
Wherein the wire loop is disposed outside the display area along a periphery of the display area. delete The method according to claim 1,
Wherein the electrical characteristic value from the electrode pad in the step of performing touch sensing includes a charge amount value or a capacitance value. delete The method according to claim 1,
Wherein the step of receiving the pen electrical signal from the stylus signal supply unit and performing the input sensing and the position sensing by the stylus using the electrode pad in the second sensing period comprises:
Blocking the pen electrical signal applied to the stylus signal supply unit and the touch electrical signal applied to the electrode pad;
Remaining an electrical residual signal on the stylus due to the interruption of the pen electrical signal applied to the stylus signal supply unit; 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. 8. The method of claim 7,
Wherein the electrical residual signal includes a ring-down signal remaining in the stylus as the driving signal applied to the stylus signal supply unit is cut off. 8. The method of claim 7,
Wherein the electrical characteristic value from the electrode pad includes a magnitude and a frequency of a voltage or a magnitude and a frequency of a current in the step of performing input sensing and position sensing by the stylus. The method according to claim 1,
Wherein the pen electrical signal applied to the stylus signal supply unit and the touch electrical signal applied to the electrode pad are simultaneously applied or applied with a time difference. The method according to claim 1,
Wherein the pen electrical signal supplied to the stylus signal supply unit is supplied while a display control signal is applied to the electrode pad to control the display. 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 period, blocking the electrode pad and the receiver amplifier, and applying the touch 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 receiving the pen electrical signal from the stylus signal supply unit and performing the input sensing and the position sensing by the stylus using the electrode pad in the second sensing period 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. The method according to claim 1,
Wherein the second sensing period is arranged temporally before or after the first sensing period on the touch sensor control period. The method according to claim 1,
Wherein the stylus is provided with an energy harvesting part for storing the pen electric signal supplied from the stylus signal supply part,
And performing input sensing and position sensing by the stylus in the second sensing period using a pen electrical signal stored in the energy harvesting part. 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;
An electrode pad signal supply unit supplying a touch electric signal to the electrode pad in the first sensing period and interrupting the touch electric signal applied to the electrode pad in the second sensing period;
A stylus signal supply unit for selectively supplying a pen electric signal to the stylus; And
The controller may measure the electrical characteristic value from the electrode pad while the touch electric signal is applied to the electrode pad in the first sensing period to detect whether the touch is caused by the body contact, A touch sensing unit for measuring electrical characteristics from the electrode pad and performing input sensing and position sensing with a stylus under a condition that both the pen electrical signal and the touch electrical signal applied to the electrode pad are blocked;
And a controller for controlling the touch sensor. 17. The method of claim 16,
An electrical residual signal remains in the stylus as the electrical signal applied to the stylus signal supply unit is blocked 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. 18. The method of claim 17,
Wherein the electrical residual signal includes a ring-down signal remaining in the stylus as the driving signal applied to the stylus signal supply unit is cut off. 17. The method of claim 16,
Wherein the stylus signal supply unit includes a wire loop disposed outside the display area along a periphery of the display area.
KR1020150117269A 2015-08-20 2015-08-20 Method and device of controlling touch sensing display KR101727590B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11513628B2 (en) 2020-05-25 2022-11-29 Samsung Display Co., Ltd. Electronic device
US11928280B2 (en) 2021-07-26 2024-03-12 Samsung Display Co., Ltd. Electronic device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11513628B2 (en) 2020-05-25 2022-11-29 Samsung Display Co., Ltd. Electronic device
US11928280B2 (en) 2021-07-26 2024-03-12 Samsung Display Co., Ltd. Electronic device

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