KR20170022383A - Method and device of controlling touch sensing display - Google Patents
Method and device of controlling touch sensing display Download PDFInfo
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- KR20170022383A KR20170022383A KR1020150117269A KR20150117269A KR20170022383A KR 20170022383 A KR20170022383 A KR 20170022383A KR 1020150117269 A KR1020150117269 A KR 1020150117269A KR 20150117269 A KR20150117269 A KR 20150117269A KR 20170022383 A KR20170022383 A KR 20170022383A
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- stylus
- sensing
- electrode pad
- signal
- electrical
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- 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
Description
BACKGROUND OF THE
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 an electric signal necessary for driving a stylus (for example, generating a frequency) and 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 method of manufacturing a stylus, comprising: providing a stylus signal supply unit for supplying an electric 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 receiving an electrical signal from the stylus signal supply unit to perform input sensing and position detection using a stylus using an electrode pad 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 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 input sensing and position sensing using a stylus in a second sensing interval using an electrode pad may be performed by interrupting an electrical signal applied to the stylus signal supply and blocking an electrical signal applied to the electrode pad Can proceed. More specifically, the step of receiving an electrical signal from the stylus signal supply unit and performing input sensing and position detection using the stylus using the electrode pad in the second sensing period may include applying an electrical signal to the stylus signal supply unit, The method comprising the steps of: interrupting an electrical signal to be applied to the stylus, respectively, leaving an electrical residual signal on the stylus as the electrical signal applied to the stylus signal supply is blocked, and measuring the electrical characteristic value from the electrode pad while the electrical residual signal is held in the stylus And performing input sensing and position sensing by touching the stylus.
In addition, the electric signal applied to the stylus signal supply unit and the electric signal applied to the electrode pad may be applied simultaneously or may be applied with a time difference. In some cases, an electric signal supplied to the stylus signal supply unit may be 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 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 stylus supply unit can be understood as an electrical signal that can remain in the stylus as the electrical signal applied to the stylus supply unit is interrupted. 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 drive signal applied to the stylus supply section is blocked, including the state where the supply of the 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 an electric signal supplied from the stylus signal supply part, 2 detection period and the position detection by the stylus can be performed. As the energy harvesting part, a conventional circuit or element capable of storing the 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 an electric signal to the electrode pad in the first sensing period and for blocking an electric signal applied to the electrode pad in the second sensing period; A stylus signal supply unit for selectively supplying an electric signal to the stylus; And an electrical characteristic value is measured from the electrode pad while the electrical signal is applied to the electrode pad in the first sensing period to detect whether or not the touch is caused by the physical contact. In the second sensing period, And a touch sensing unit for measuring an electrical characteristic value from the electrode pad while performing an electrical signal applied to the pad, respectively, and performing input sensing and position sensing with the stylus.
An electrical residual signal may remain in the stylus as the electrical signal applied to the stylus signal supply unit is blocked in the second sensing period and the touch sensing unit measures the electrical characteristic value from the electrode pad while the electrical residual signal is maintained in the stylus 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.
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, The input of the stylus can be detected by detecting the change in the electrical characteristic value of the stylus. 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.
In addition, according to the present invention, an electrical signal necessary for driving the stylus can be provided in an area extending beyond the electrode pad through the stylus supply unit, 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 to input 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.
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 an electric signal to a stylus (see 400 in FIG. 5) (S20) of time-sharing the control period of the electrode pad 110 (see
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
First, a stylus
As the stylus
The
More specifically, the
On the other hand, it is possible to supply an 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 sufficient electrical signals to the stylus through the electrode pad. Therefore, it is preferable that the stylus
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
Since the
Here, the display control period may be understood as an interval in which the
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
The method of sensing the touch by the body contact in the first sensing period using the
For example, referring to FIG. 4, in the step of sensing the touch by the physical contact in the first sensing period using the
A switch may be provided in the wiring connecting the
More specifically, a transmitter amplifier and a receiver amplifier, which are respectively connectable to the
For reference, the transmitter circuit portion of the touch sensing circuit can simultaneously perform touch sensing by the body by measuring an amount of capacitance or electric charge while transmitting an electric signal to the electrode pad.
In addition, in the present invention, when an electric signal is applied to the
The electric characteristic value measured from the
For example, in an embodiment of the present invention, an electric signal is applied to the stylus signal supply unit during touch detection by body contact in the first sensing period. In some cases, it is also possible that the electric signal is applied to the electrode pad and the electric signal is applied to the stylus signal supply unit at predetermined time intervals.
Next, an electric signal is supplied from the stylus
The sensing of the touch by the
Hereinafter, the step of performing input sensing and position sensing using a stylus in the second sensing period using the
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
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
More specifically, a transmitter amplifier and a receiver amplifier connectable to the
The electrical residual signal remaining in the
For example, a driving voltage (e.g., a pulse voltage or an AC voltage) is applied to the
Here, the driving signal applied to the stylus
The electrical characteristic value measured from the
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
6 to 8, among the plurality of
A switch may be provided between the plurality of
In this way, when a plurality of
The method using the
In the above-described embodiments of the present invention, an 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 supplying part, and an input by the stylus in the second sensing part using the electric signal stored in the energy hubbing part Detection and position detection can be performed.
As the energy harvesting part, a conventional circuit or element capable of storing the 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.
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 an electric signal to the
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 an 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 electrical signal applied to the stylus signal supply unit is blocked in the second sensing period, It is possible to measure the characteristic value 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 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 by a first sensing section (body sensing) and a second sensing section (stylus sensing), and a second sensing section may include a second-A And a second-B section in which an electrical residual signal remains in the stylus.
In the first sensing period, an electrical signal may be applied to the electrode pad, and an electrical characteristic value may be measured from the electrode pad while the electrical signal is applied to the electrode pad, thereby detecting whether the touch is caused by the 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 electric signal to the electrode pad can be cut off. 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.
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.
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)
Providing a stylus signal supply for supplying an 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
Performing input detection and position detection by the stylus using the electrode pad in the second sensing period by receiving the electrical signal from the stylus signal supply unit;
And a control unit for controlling the touch sensor.
Wherein the stylus signal supply unit includes a wire loop that provides the electric signal in an area relatively larger than the electrode pad.
Wherein the wire loop is disposed outside the display area along a periphery of the display area.
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.
Wherein the electrical characteristic value includes a charge amount value or a capacitance value.
Wherein the step of receiving the electric signal from the stylus signal supply unit and performing the input sensing and the position detection by the stylus using the electrode pad in the second sensing period comprises:
The stylus signal supply unit, the electrical signal applied to the stylus signal supply unit, and the electrical signal applied to the electrode pad.
Wherein the step of receiving the electric signal from the stylus signal supply unit and performing the input detection and the position detection by the stylus using the electrode pad in the second sensing period comprises:
Blocking the electrical signal applied to the stylus signal supply unit and the electrical signal applied to the electrode pad;
Remaining an electrical residual signal on the stylus as the electrical signal applied to the stylus signal supply 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.
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.
Wherein the electrical characteristic value includes a magnitude and frequency of a voltage or a magnitude and a frequency of a current.
Wherein the electrical signal applied to the stylus signal supply unit and the electrical signal applied to the electrode pad are simultaneously applied or applied with a time difference.
Wherein the 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.
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 receiving the electric signal from the stylus signal supply unit and performing the input sensing and the position detection 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 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.
Wherein the second sensing period is arranged temporally before or after the first sensing period on the touch sensor control period.
Wherein the stylus is provided with an energy harvesting part for storing the 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 an electrical signal stored in the energy harvesting part.
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 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;
A stylus signal supply unit for selectively supplying an electric signal to the stylus; And
Wherein the controller senses an electrical property value from the electrode pad while the electrical signal is being applied to the electrode pad in the first sensing period to detect whether the touch is made by body contact, A touch sensing unit for measuring an electrical characteristic value from the electrode pad while performing an input sensing and a position sensing by the stylus while the electrical signal to be applied to the electrode pad and the electrical signal to be applied to the electrode pad are blocked,
And a controller for controlling the touch sensor.
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.
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.
Wherein the stylus signal supply unit includes a wire loop disposed outside the display area along a periphery of the display area.
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