KR20180019891A - Active stylus pen, touoch sensing system having the same and touch sensing method using the same - Google Patents

Abstract

An active stylus pen having a palm rejection function, a touch sensing system having the same, and a touch sensing method using the same are disclosed. The active stylus pen includes: a conductive pen case made of a conductive material; a stylus tip connected to one end of the conductive pen case; and a signal supply part for supplying a pen drive signal to the stylus tip and providing a palm reflection signal to the conductive pen case. Accordingly, a palm refection function can be achieved by applying a palm rejection signal different from the pen driving signal applied to the stylus tip to the conductive pen case.

Description

TECHNICAL FIELD [0001] The present invention relates to an active stylus pen, a touch sensing system having the same, and a touch sensing method using the touch pen.

More particularly, the present invention relates to an active stylus pen having a palm rejection function, a touch sensing system having the palm rejection function, and a touch sensing system using the active stylus pen. ≪ / RTI >

2. Description of the Related Art Flat panel displays (hereinafter simply referred to as "display devices") are used in various types of electronic products including mobile phones, tablet PCs, and notebook computers. 2. Description of the Related Art Flat panel displays include a liquid crystal display (LCD), a plasma display (PDP), and an organic light emitting display (OLED). Recently, EPD: ELECTROPHORETIC DISPLAY) is also widely used.

A touch screen panel is a type of input device that is installed in a display device and allows a user to directly touch the screen with a finger or a pen while viewing the display device to input information.

As a method of sensing a touch, there is a method of sensing a touch using a change in capacitance. When a human body or a conductive material touches a touch screen panel, the capacitance type senses a change in capacitance to determine the presence or absence of a touch and touch coordinates.

The electrostatic capacity method can also be applied to a method of determining the presence or absence of a touch by the pen. For example, in the case where a conductive material is present in the pen, the presence or absence of touch can be determined by using a change in capacitance between the pen and the touch screen panel.

When an active pen that outputs a pen voltage is used so that the touch sensing portion can sense the pen as described in U.S. Patent Application Publication No. 2013-0106720 and the like, by using a touch screen panel using the electrostatic capacitive method, And the presence or absence of the touch can be determined by the active pen.

In addition, as described in Korean Patent Laid-open Publication No. 10-2014-0022222, when a stylus pen that outputs a pen signal by radio is used when a touch driving voltage is received from the touch screen panel, The display device receives the pen signal and determines a position where the stylus pen is touched on the touch screen panel.

In the display device for determining whether or not a touch is made by the stylus pen, the touch screen panel can be used for determining whether or not a touch is made by a user's finger.

The user who uses the stylus pen contacts the touch screen panel with the side of the hand in the writing habit. In this case, the display device judges that there is a touch at a portion where the side of the hand touches.

However, since the area judged to be touched by the side contact of the hand is not the intended touch area by the user, the touch area should not be recognized as a touch. In this case, the conventional display device performs a Palm Rejection function in order not to recognize the touch area by touch.

1 is a schematic view for explaining a palm touch generated on a touch screen panel by a general active stylus pen.

As shown in Fig. 1, since it is difficult to distinguish the touch by the side of the hand and the touch by the finger, the touch by the side of the hand is difficult to be removed in the conventional display device. In more detail, the judgment as to whether or not the touch is made by the finger and the judgment as to whether or not the touch is made by the stylus pen are performed individually, so that they do not affect each other.

However, due to the habit of the user holding the stylus pen, when the stylus pen is used, the side of the user's hand touches the touch screen panel. In this case, raw data (raw data) used for touch presence determination is generated by touching by the side of the hand. Such low data may be an obstacle when judging whether or not the touch by the stylus pen is present. Accordingly, an unintended touch area other than the touch area by the stylus pen can be detected.

Korean Patent Publication No. 2016-0042236 U.S. Published Patent Application No. 2013-0106720 Korean Patent Publication No. 2014-0022222

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an active stylus pen that realizes a palm reflex function by providing a palm rejection signal different from a pen driving signal.

Another object of the present invention is to provide a touch sensing system having the above active stylus pen.

It is still another object of the present invention to provide a touch sensing method using the above-described touch sensing system.

In order to achieve the object of the present invention, the active stylus pen according to one embodiment includes a conductive pen case made of a conductive material; A stylus tip connected to one end of the conductive pen case; And a signal supply unit for supplying a pen drive signal to the stylus tip and providing a palm rejection signal to the conductive pen case.

In one embodiment, the pen drive signal is changed to a sensing signal and provided to an external lead-out circuit, the palm rejection signal being provided to the lead-out circuit via a user's hand and a touch screen panel, Out circuit calculates the touch coordinates based on the sensing signal, and ignores the touch caused by the palm rejection signal.

In one embodiment, the pen drive signal and the palm rejection signal may have different frequencies, different amplitudes, or different phases.

In one embodiment, the pen drive signal has a first frequency, the palm rejection signal has a second frequency, the signal supply includes: a first buffer connected to the stylus tip; A second buffer connected to the conductive pen case; A multiple frequency output unit for outputting the pen drive signal having the first frequency to the first buffer and outputting the palm rejection signal having the second frequency to the second buffer; And a main control unit disposed in the conductive pen case, for controlling the multi-frequency output unit by determining the first frequency and the second frequency.

In one embodiment, the active stylus pen may further include a gyro sensor disposed in the conductive pen case for detecting a tilt, including tilt-up, tilt-down, have.

In one embodiment, when the bell signal of the pen is detected by the gyro sensor, the signal supply unit may apply a signal different from the pen drive signal to the stylus tip.

In one embodiment, the stylus pen further includes an erasure member disposed in an opposite echo from the stylus tip, and when the gyro signal of the pen is detected by the gyro sensor, the signal supply unit is connected to the erasure member A third signal can be applied.

According to another aspect of the present invention, there is provided a touch sensing system including: a conductive pen case made of a conductive material; a stylus tip connected to one end of the conductive pen case; An active stylus pen including a signal supply unit for providing a palm rejection signal to the conductive pen case; A touch screen panel including a driving line for transmitting the pen driving signal and the palm rejection signal, and a sensing line for transmitting a sensing signal induced in the driving line; And a control unit for classifying a first signal corresponding to the pen driving signal and a second signal corresponding to the palm rejection signal from the sensing signal provided from the sensing line and ignoring the touch caused by the second signal, And a readout circuit for calculating touch coordinates based on the 1-signal.

In one embodiment, the pen drive signal is provided to the lead-out circuit as the first signal via the stylus tip and the touch screen panel, and the palm reflex signal is applied to the conductive pen case, And may be provided to the lead-out circuit as the second signal via a touch screen panel.

In one embodiment, the active stylus pen may further include a gyro sensor disposed in the conductive pen case and detecting rotation or tilt of the stylus pen.

In one embodiment, when the bell signal of the pen is detected by the gyro sensor, the signal supply unit may apply a signal different from the pen drive signal to the stylus tip.

In one embodiment, the stylus pen further includes an erasure member disposed in an opposite echo from the stylus tip, and when the gyro signal of the pen is detected by the gyro sensor, the signal supply unit is connected to the erasure member A third signal can be applied.

In one embodiment, when the third signal is detected through the sensing line, the lead-out circuit may delete the touch coordinates corresponding to the third signal from the drawing.

According to another aspect of the present invention, there is provided a touch sensing method comprising: generating a pen drive signal and a palm reflex signal; Providing the stylus tip with the pen drive signal; Applying the palm rejection signal to the conductive pen case; Detecting a sensing signal induced in a driving line for transmitting the pen driving signal and the palm reflex signal through a sensing line; Classifying the sensing signal into a first signal corresponding to the pen driving signal and a second signal corresponding to the palm rejection signal; And calculating touch coordinates based on the first signal, ignoring the touch caused by the second signal.

In one embodiment, the pen drive signal and the palm rejection signal may be provided at the same time.

According to the active stylus pen, the touch sensing system having the same, and the touch sensing method using the active stylus pen, a palm rejection signal different from the pen driving signal applied to the stylus tip is applied to the conductive pen case. The palm rejection signal is provided to the touch screen panel via the user's hand. In the lead-out circuit, the first signal corresponding to the pen driving signal and the palm rejection signal corresponding to the sensing signal detected through the sensing line Lt; / RTI > The palm printing function can be achieved by calculating the touch coordinates on the basis of the first signal while ignoring the touch caused by the second signal when calculating the touch coordinates.

1 is a schematic view for explaining a palm touch generated on a touch screen panel by a general active stylus pen.
2 is a schematic diagram for explaining palm rejection generated on a touch screen panel by an active stylus pen according to the present invention.
3 is a schematic diagram for explaining an active stylus pen according to the first embodiment of the present invention.
4 is a schematic diagram for explaining an active stylus pen according to a second embodiment of the present invention.
5 is a frequency versus voltage curve to illustrate characteristics of signals on a touch screen panel.
FIG. 6 is frequency spectrums for explaining frequency extraction corresponding to the palm area.
7 is a schematic diagram for explaining an active stylus pen according to a third embodiment of the present invention.
8 is a schematic diagram for explaining an active stylus pen according to a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

2 is a schematic diagram for explaining palm rejection generated on the touch screen panel 100 by the active stylus pen 200 according to the present invention.

Referring to FIG. 2, in a touch sensing system having a touch screen panel 100 using an electrostatic capacity type, when a human body or a conductive material contacts a touch sensor of the touch screen panel 100, And calculates touch presence or touch coordinates. 2, a plurality of TX electrodes are disposed on a lower layer of the touch screen panel 100, and a plurality of RX electrodes are disposed on an upper layer of the touch screen panel 100. However, a plurality of RX electrodes may be disposed on a lower layer, And the TX electrodes and the RX electrodes may be disposed on the same layer.

The touch sensing system according to the present invention calculates the touch coordinates of the stylus pen 200 by using a sensing signal sensed as the stylus pen 200 approaches or touches the touch screen panel 100. [ To this end, in the touch sensing system according to the present invention, the stylus pen 200 supplies a pen driving signal to the touch screen panel 100. The pen drive signal is provided to a readout circuit (not shown) via a sensing line of the touch screen panel 100 to calculate touch coordinates. The pen drive signal may have a frequency for pen sensing f1.

In addition, the stylus pen 200 outputs a palm rejection signal to the conductive pen case of the stylus pen 200. The palm rejection signal is provided to the touch screen panel 100 via the user's finger or palm. The palm rejection signal provided to the touch screen panel 100 is provided to the lead-out circuit via the sensing line of the touch screen panel 100. The palm rejection signal may have a frequency for rejecting palm rejection (f2).

When calculating the touch coordinates, the lead-out circuit calculates touch coordinates by ignoring the touch area corresponding to the palm reflex signal.

Of the constituent elements of the stylus pen 200, the configuration for outputting the pen driving signal may be configured in various forms currently known.

The basic structure of the stylus pen 200 according to the present invention, that is, a structure for outputting the pen driving signal so that a touch can be sensed in the touch screen panel 100, 200, the present invention can be configured in various forms as currently known.

FIG. 3 is a schematic diagram for explaining the active stylus pen 200 according to the first embodiment of the present invention.

Referring to FIG. 3, an active stylus pen 200 according to a first embodiment of the present invention includes a conductive pen case 210, a stylus tip 220, and a signal supply unit 230. The illustration of the battery supplying the power of the active stylus pen in Fig. 3 is omitted.

The conductive pen case 210 is made of a conductive material, wholly or partly, and has a rod shape. The stylus tip 220 is connected to one end of the conductive pen case 210 in a protruding manner.

The stylus tip 220 is connected to one end of the conductive pen case 210.

The signal supply unit 230 provides a pen drive signal to the stylus tip 220 and provides a palm print signal to the conductive pen case 210. The pen drive signal and the palm refill signal may be simultaneously output. The pen drive signal is changed to a sensing signal and provided to an external lead-out circuit (not shown). The lead-out circuit may be mounted on a touch screen panel (not shown). The palm rejection signal is provided to the lead-out circuit via the user's hand and the touch screen panel. The lead-out circuit calculates the touch coordinates of the stylus tip 220 based on the sensing signal, and ignores the touch caused by the palm reflex signal.

In this embodiment, the pen drive signal and the palm rejection signal may have different frequencies. For example, if the pen drive signal has a first frequency and the palm rejection signal has a second frequency, the signal supply 230 may include a first buffer 232, a second buffer 234, A frequency output unit 236 and a main control unit 238.

The first buffer 232 is connected between the multi-frequency output unit 236 and the stylus tip 220.

The second buffer 234 is connected between the multi-frequency output unit 236 and the conductive pen case 210.

The multi-frequency output unit 236 outputs a pen drive signal having a first frequency to the first buffer 232 and a palm rejection signal having a second frequency to the second buffer 234. Accordingly, the pen drive signal of the first frequency is supplied to the stylus tip 220, and the palm rejection signal of the second frequency is supplied to the conductive pen case 210.

The main control unit 238 is disposed in the conductive pen case 210 and controls the multi-frequency output unit 236 by determining the first frequency and the second frequency.

Meanwhile, the pen driving signal and the palm rejection signal may have different amplitudes. Since the pen driving signal and the palm reproduction signal can be distinguished from each other by the amplitude, when calculating the touch coordinates, the lead-out circuit can ignore the touch area corresponding to the palm rejection signal and calculate the touch coordinates have.

Meanwhile, the pen driving signal and the palm rejection signal may have different phases. Since the pen drive signal and the palm refuge signal can be distinguished from each other in phase, when calculating the touch coordinates, the lead-out circuit can ignore the touch area corresponding to the palm rejection signal and calculate touch coordinates have.

In operation, the signal supply unit 230 generates a pen driving signal and a palm rejection signal. The pen drive signal and the palm reflex signal may be generated in the multi-frequency output unit 236 to have different frequencies. The different frequencies may be determined by the main control unit 238.

Next, the signal supply unit 230 applies the pen driving signal to the stylus tip, and applies the palm rejection signal to the conductive pen case. The pen drive signal may be applied via the first buffer 232 and the palm rejection signal may be applied via the second buffer 234.

A lead-out circuit, which can be disposed on the touch screen panel, detects a sensing signal induced in a driving line for transmitting the pen driving signal and the palm rejection signal through a sensing line. The driving line or the sensing line is disposed on the touch screen panel.

Then, the lead-out circuit classifies a first signal corresponding to the pen driving signal and a second signal corresponding to the palm reflex signal in the sensing signal.

Then, the lead-out circuit ignores the touch caused by the second signal and calculates touch coordinates based on the first signal.

4 is a schematic diagram for explaining an active stylus pen according to a second embodiment of the present invention.

Referring to FIG. 4, an active stylus pen 400 according to a second embodiment of the present invention includes a conductive pen case 210, a stylus tip 220, and a signal supply unit 430. The illustration of the battery supplying power to the active stylus pen in Fig. 4 is omitted.

Since the conductive pen case 210 and the stylus tip 220 are shown in FIG. 3, they are denoted by the same reference numerals, and detailed description thereof is omitted.

The signal supply unit 430 provides a pen drive signal to the stylus tip 220 and provides a palm print signal to the conductive pen case 210. The pen drive signal and the palm refill signal may be simultaneously output. The pen drive signal is changed to a sensing signal and provided to an external lead-out circuit (not shown). The lead-out circuit may be mounted on a touch screen panel (not shown). The palm rejection signal is provided to the lead-out circuit via the user's hand and the touch screen panel. The lead-out circuit calculates touch coordinates based on the sensing signal, and ignores the touch caused by the palm reflex signal.

In this embodiment, the pen drive signal and the palm rejection signal may have different frequencies. For example, if the pen drive signal has a first frequency and the palm rejection signal has a second frequency, the signal supply 430 may include a first buffer 232, a second buffer 234, A frequency output unit 436, a gyro sensor 437, and a main control unit 438.

The first buffer 232 is connected between the multi-frequency output unit 436 and the stylus tip 220.

The second buffer 234 is connected between the multi-frequency output unit 436 and the conductive pen case 210.

The multifrequency output unit 436 outputs the pen drive signal having the first frequency to the first buffer 232 and outputs the pen drive signal having the second frequency to the second buffer 234. [ . Accordingly, the pen drive signal of the first frequency is supplied to the stylus tip 220, and the palm rejection signal of the second frequency is supplied to the conductive pen case 210.

The gyro sensor 437 may be disposed within the conductive pen case 210 to rotate or tilt the stylus pen 400 such as tilt up or tilt down, , The degree of bell sound, and the like.

The main control unit 438 is disposed in the conductive pen case 210 and controls the multi-frequency output unit 436 by determining the first frequency and the second frequency.

Meanwhile, the pen driving signal and the palm rejection signal may have different amplitudes. On the other hand, the pen driving signal and the palm rejection signal may have different phases.

5 is a frequency versus voltage curve to illustrate characteristics of signals on a touch screen panel.

Referring to FIG. 5, when an active stylus pen outputs a driving frequency having a frequency of 100 Hz and an amplitude of 5.1 volt, a signal detected at a finger near the active stylus pen has a frequency of 100 Hz and a signal having an amplitude of approximately 4.52 volts And a signal detected at a finger far from the active stylus pen is detected with a frequency of 100 Hz and an amplitude of approximately 4.8 volts.

On the other hand, when the active stylus pen outputs a driving frequency having a frequency of 500 Hz and an amplitude of 5.1 volts, a signal detected at a finger near the active stylus pen is detected as a signal having a frequency of 500 Hz and an amplitude of approximately 4.3 volts, The signal detected at the finger far from the stylus pen is detected with a frequency of 500 Hz and an amplitude of approximately 4.45 volts.

On the other hand, when the active stylus pen outputs a driving frequency having a frequency of 1000 Hz and an amplitude of 5.1 volts, a signal detected at a finger near the active stylus pen is detected as a signal having a frequency of 1000 Hz and an amplitude of approximately 3.8 volts, The signal detected at the finger far from the stylus pen is detected with a frequency of 1000 Hz and an amplitude of approximately 3.7 volts.

That is, it can be seen from FIG. 5 that the driving frequency generated from the pen is capable of signal sensing for the corresponding frequency / phase in a finger near or far from the pen. Although there is attenuation of the amplitude due to the impedance of the body, it can be discriminated in the lead-out circuit because it is damped as a whole.

FIG. 6 is frequency spectrums for explaining frequency extraction corresponding to the palm area.

Referring to FIG. 6, in the state where the stylus pen is not used (Base state), signals having frequencies f0, f1, f2, f3 and f4 are detected on the touch screen panel.

On the other hand, when the stylus pen is used, signals having frequencies f0, f1, f2, f3, f4, f5 and f6 are detected in the touch screen panel in a state in which an unintended touch area is detected (Touch state). At this time, the magnitude of the signal having the frequency f1 detected when the stylus pen is used is smaller than the magnitude of the signals having the frequency f1 detected when the stylus pen is not used.

Further, when a stylus pen is used compared to the case where the stylus pen is not used, signals having frequencies of f5 and f6 are further detected.

Subtracting the frequency spectrum of the state where the stylus pen is used in the frequency spectrum without using the stylus pen, it can be confirmed that the positive f1 frequency, the negative f5 frequency and the negative f6 frequency are remained. Here, a signal having a positive f1 frequency is a palm rejection signal detected via a finger and a palm, and a signal having a negative f5 frequency and a signal having a negative f6 frequency are pen driving signals according to use of the stylus pen . In particular, a signal having a negative f5 frequency is a signal corresponding to the stylus pen touch sensitivity, and a signal having a negative f6 frequency may be a pen pressure signal.

7 is a schematic diagram for explaining an active stylus pen according to a third embodiment of the present invention.

Referring to FIG. 7, an active stylus pen according to a third embodiment of the present invention includes a conductive pen case 210, a stylus tip 220, a signal supply unit 630, and an erasing member 640. 7, the illustration of the battery supplying power to the active stylus pen is omitted.

Since the conductive pen case 210 and the stylus tip 220 have been described with reference to FIG. 3, they are denoted by the same reference numerals, and detailed description thereof will be omitted.

The signal supply unit 630 provides a pen drive signal to the stylus tip 220 and provides a palm reflex signal to the conductive pen case 210. The pen drive signal and the palm refill signal may be simultaneously output. The pen drive signal is changed to a sensing signal and provided to an external lead-out circuit (not shown). The lead-out circuit may be mounted on a touch screen panel (not shown). The palm rejection signal is provided to the lead-out circuit via the user's hand and the touch screen panel. The lead-out circuit calculates touch coordinates based on the sensing signal, and ignores the touch caused by the palm reflex signal.

In this embodiment, the pen drive signal and the palm rejection signal may have different frequencies. For example, if the pen drive signal has a first frequency and the palm rejection signal has a second frequency, the signal supply unit 630 may include a first buffer 232, a second buffer 234, A frequency output unit 636 and a main control unit 638. [

The first buffer 232 is connected between the multi-frequency output unit 636 and the stylus tip 220.

The second buffer 234 is connected between the multi-frequency output unit 636 and the conductive pen case 210.

The multi-frequency output unit 636 outputs the pen driving signal having the first frequency to the first buffer 232 and outputs the pen-driving signal having the second frequency to the second buffer 234, .

When the beeping signal of the pen is detected, the signal supplying unit 630 applies a signal different from the pen driving signal to the stylus tip 220. The bell signal of the pen described above can be detected in various ways. For example, it can be detected based on the operation of a button disposed in a partial area of the conductive pen case 210. For example, in the case of handwriting, when the handwriting is performed while the user presses the button through the finger, the beeping signal of the pen is not detected. However, if the button is not pressed, a ringing signal can be detected.

The erasing member 640 is disposed in a direction opposite to the stylus tip 220, that is, in the opposite direction. When the beeping signal of the pen is detected, the signal supplying unit 630 may apply the third signal to the erasing member 640.

Accordingly, when the third signal applied to the erasing member 640 is detected by the touch screen panel, the area corresponding to the third signal may be erased.

8 is a schematic diagram for explaining an active stylus pen according to a fourth embodiment of the present invention.

8, an active stylus pen 800 according to a fourth embodiment of the present invention includes a conductive pen case 210, a stylus tip 220, a signal supply unit 830, and an erasing member 640 . The illustration of the battery supplying power to the active stylus pen is omitted in FIG.

Since the conductive pen case 210 and the stylus tip 220 have been described with reference to FIG. 3, they are denoted by the same reference numerals, and detailed description thereof will be omitted.

The signal supply unit 830 provides a pen drive signal to the stylus tip 220 and provides a palm reflex signal to the conductive pen case 210. The pen drive signal and the palm refill signal may be simultaneously output. The pen drive signal is changed to a sensing signal and provided to an external lead-out circuit (not shown). The lead-out circuit may be mounted on a touch screen panel. The palm rejection signal is provided to the lead-out circuit via the user's hand and the touch screen panel. The lead-out circuit calculates touch coordinates based on the sensing signal, and ignores the touch caused by the palm reflex signal.

In this embodiment, the pen drive signal and the palm rejection signal may have different frequencies. For example, if the pen drive signal has a first frequency and the palm rejection signal has a second frequency, the signal supply 830 may include a first buffer 232, a second buffer 234, A frequency output unit 836, a gyro sensor 837, and a main control unit 838. [

The first buffer 232 is connected between the multi-frequency output unit 836 and the stylus tip 220.

The second buffer 234 is connected between the multi-frequency output unit 836 and the conductive pen case 234.

The multifrequency output unit 836 outputs the pen drive signal having the first frequency to the first buffer 232 and outputs the pen drive signal having the second frequency to the second buffer 234, .

The gyro sensor 837 may be disposed within the conductive pen case 210 to rotate or tilt the stylus pen such as tilt up or tilt down or tilt down, And the like.

When the bell signal of the pen is detected by the gyro sensor 837, the signal supplying unit 830 applies a signal different from the pen driving signal to the stylus tip 220.

The erasing member 640 is disposed in an opposite echo to the stylus tip 220. When the bell signal of the pen is detected by the gyro sensor 837, the signal supply unit 830 can apply the third signal to the erasing member 640.

Accordingly, when the third signal applied to the erasing member 640 is detected by the touch screen panel, the area corresponding to the third signal may be erased.

As described above, according to the present invention, a palm rejection signal different from the pen driving signal applied to the stylus tip is applied to the conductive pen case. The palm rejection signal is provided to the touch screen panel via the user's hand. In the lead-out circuit, the first signal corresponding to the pen driving signal and the palm rejection signal corresponding to the sensing signal detected through the sensing line Lt; / RTI > The palm printing function can be achieved by calculating the touch coordinates on the basis of the first signal while ignoring the touch caused by the second signal when calculating the touch coordinates.

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 or scope of the invention as defined in the appended claims. You will understand.

100: touch screen panel 200: stylus pen
210: conductive pen case 220: stylus tip
230, 430, 630, 830: a signal supply unit 232:
234: Second buffer
236, 436, 636, 836: Multiple frequency output section
238, 438, 636, 836: Main control unit
437, 837: Gyro sensor 640: Erasing member

Claims (15)

A conductive pen case made of a conductive material;
A stylus tip connected to one end of the conductive pen case; And
And a signal supply unit for supplying a pen drive signal to the stylus tip and providing a palm rejection signal to the conductive pen case. 2. The lead-out circuit according to claim 1, wherein the pen drive signal is changed to a sensing signal and provided to an external lead-out circuit, and the palm reflex signal is provided to the lead-out circuit via a user's hand and a touch screen panel,
Wherein the lead-out circuit calculates touch coordinates based on the sensing signal, and ignores the touch caused by the palm reflex signal. The active stylus pen of claim 1, wherein the pen drive signal and the palm reflex signal have different frequencies, different amplitudes, and different phases. 2. The apparatus of claim 1, wherein the pen drive signal has a first frequency and the palm rejection signal has a second frequency,
A first buffer connected to the stylus tip;
A second buffer connected to the conductive pen case;
A multiple frequency output unit for outputting the pen drive signal having the first frequency to the first buffer and outputting the palm rejection signal having the second frequency to the second buffer; And
And a main control unit disposed in the conductive pen case for controlling the multi-frequency output unit by determining the first frequency and the second frequency. The electronic pen according to claim 1, further comprising a gyro sensor disposed in the conductive pen case and detecting a tilt including a degree of tilt-up, a tilt-down, Active stylus pen. The active stylus pen according to claim 5, wherein, when the gyro signal of the pen is detected by the gyro sensor, the signal supply unit applies a signal different from the pen drive signal to the stylus tip. 6. The stylus pen of claim 5, wherein the stylus pen further comprises an erasure member disposed in an opposite echo to the stylus tip,
Wherein when the gyro signal of the pen is detected by the gyro sensor, the signal supply unit applies a third signal to the erasing member. And a signal supply unit for supplying a pen drive signal to the stylus tip and providing a palm rejection signal to the conductive pen case, the stylus tip being connected to one end of the conductive pen case, pen;
A touch screen panel including a driving line for transmitting the pen driving signal and the palm rejection signal, and a sensing line for transmitting a sensing signal induced in the driving line; And
A first signal corresponding to the pen drive signal and a second signal corresponding to the palm rejection signal from the sensing signal provided from the sensing line and ignoring the touch caused by the second signal, And a lead-out circuit for calculating touch coordinates based on the signal. 9. The display device of claim 8, wherein the pen drive signal is provided to the lead-out circuit as the first signal via the stylus tip and the touch screen panel,
Wherein the palm rejection signal is provided to the lead-out circuit as the second signal via the conductive pen case, the user's hand, and the touch screen panel. The electronic device according to claim 8, wherein the active stylus pen further comprises a gyro sensor disposed in the conductive pen case for detecting a tilt including tilt-up, tilt-down, tilt-down, The touch sensing system comprising: The touch sensing system according to claim 10, wherein, when the bell signal of the pen is detected by the gyro sensor, the signal supply unit applies a signal different from the pen drive signal to the stylus tip. 11. The stylus pen of claim 10, wherein the stylus pen further comprises an erasure member disposed in an opposite echo to the stylus tip,
Wherein when the gyro signal of the pen is detected by the gyro sensor, the signal supply unit applies a third signal to the erasing member. 12. The touch sensing system of claim 11, wherein the lead-out circuit deletes touch coordinates corresponding to the third signal from the drawing when the third signal is detected through the sensing line. Generating a pen drive signal and a palm rejection signal;
Providing the stylus tip with the pen drive signal;
Applying the palm rejection signal to the conductive pen case;
Detecting a sensing signal induced in a driving line for transmitting the pen driving signal and the palm reflex signal through a sensing line;
Classifying the sensing signal into a first signal corresponding to the pen driving signal and a second signal corresponding to the palm rejection signal; And
And calculating touch coordinates based on the first signal by ignoring the touch caused by the second signal. 15. The touch sensing method of claim 14, wherein the pen drive signal and the palm rejection signal are simultaneously provided.

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