KR101652973B1 - Digitizer using gradient of stylus pen - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a digitizer, and more particularly, to a digitizer that calculates tilt information on a touch screen of a stylus pen and uses the tilt information.
A digitizer using a tilt information of a stylus pen according to an embodiment of the present invention includes a magnetic body, a stylus pen for generating a magnetic field at an upper portion of the touch screen, and a three-dimensional vector of magnetic force lines formed by the stylus pen And a sensor for sensing and calculating a tilt value of the stylus pen.

Description

TECHNICAL FIELD [0001] The present invention relates to a digitizer using a stylus pen tilt information,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digitizer, and more particularly, to a digitizer for calculating tilt information on a touch screen of a stylus pen and using the information.

A digitizer is a type of input device used in a display device and includes a matrix electrode structure. When a user moves a pen or a cursor, it reads X and Y coordinates on a matrix to transmit a position signal of the input device, And executes the corresponding command.

A digitizer is also referred to as a touch panel or a tablet in a broad sense, and two sheets of substrates coated with a transparent electrode layer are adhered to each other with a dot spacer therebetween so as to face each other. When the upper substrate is contacted with a finger or a pen, An ultrasonic reflection method using a piezoelectric element using a surface wave generating transducer, an electromagnetic resonance method using a coil that resonates electromagnetic waves on a pattern layer that generates electromagnetic waves, and a static electricity in a human body And a capacitive method of detecting the position where the amount of current is changed by using the capacitance.

The digitizer product including the stylus pen according to the related art discloses a technique for determining whether or not the pen tip is in contact and the position of the contact point, and does not recognize the inclination of the stylus pen, When the tip of the probe 110 contacts the same point P1 on the touch screen 140, there is a limit to measure only the same position information P1 irrespective of the tilt.

It is an object of the present invention to provide a digitizer capable of calculating tilt information of a stylus pen and using the same to implement various UIs.

A digitizer using a tilt information of a stylus pen according to an embodiment of the present invention includes a magnetic body, a stylus pen for generating a magnetic field at an upper portion of the touch screen, and a three-dimensional vector of magnetic force lines formed by the stylus pen And a sensor for sensing and calculating a tilt value of the stylus pen.

According to another aspect of the present invention, there is provided a digitizer for implementing a UI using tilt information of a stylus pen, comprising: a stylus pen including a magnetic body and generating a magnetic field at an upper portion of the touch screen; And a controller for calculating a slope value calculated by the sensor and the sensor to obtain a three-dimensional slope value of the stylus pen, and transmitting the predetermined control command signal.

The digitizer using the tilt information of the stylus pen according to the present invention recognizes a magnetic line of force formed by a magnetic body disposed inside the stylus pen using a sensor disposed on the outer surface of the touch screen, It is possible to easily calculate the inclination value with respect to the touch screen plane.

In addition, it is possible to calculate the three-dimensional tilt information of the stylus pen on the touch screen plane by synthesizing the tilt values measured by the plurality of sensors, and using the same, various UIs are implemented and provided according to the preset control command signals There is a possible effect.

According to the present invention, the position where the stylus pen tip touches the touch screen plane is tracked using the three-dimensional tilt information, thereby correcting misrecognition about a position generated when the stylus pen touches the touch screen in a tilted state , The accurate position of the actual stylus pen tip can be calculated and applied to the palm refection.

According to the present invention, the tilt information of the stylus pen is acquired and it is detected whether the user is currently operating the stylus pen with the right hand or the left hand, and the position of the menu bar displayed on the touch screen So that the user convenience is increased.

In addition, according to the present invention, by adjusting the thickness of the handwriting input on the touch screen according to the inclination of the stylus pen, it is possible for the user to easily draw a line of different thickness using the stylus pen, It is expected that the digitizer can be used with the same texture as that used.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is an exemplary view showing an embodiment using a stylus pen according to the prior art.
2 is a perspective view illustrating a digitizer using tilt information of a stylus pen according to an embodiment of the present invention.
3 is an exemplary view showing a magnetic force measurement of a sensor according to an embodiment of the present invention.
4 is a conceptual diagram illustrating a stylus pen slope value calculating method of a sensor according to an embodiment of the present invention.
FIG. 5 is a conceptual diagram showing a magnetic line of force and a line of equal magnetic force formed by the stylus pen according to the embodiment of the present invention. FIG.
FIG. 6 is a conceptual diagram illustrating a magnetic line of force and a line of equal magnetic force formed when the stylus pen is orthogonal to the touch screen according to the embodiment of the present invention.
7 is a top view showing magnetic lines of force and equi-magnetic force lines shown in Fig.
8 is a side view showing a line of equal magnetic force formed around the stylus pen shown in Fig.
FIG. 9 is a conceptual diagram illustrating a process of measuring a vector value of a sensor according to the stylus pen touch shown in FIG.
10 is a graph showing a characteristic of a magnitude of a magnetic force according to a distance from a sensor to a magnetic body according to an embodiment of the present invention.
11 is a conceptual diagram illustrating touch location recognition using a triangulation method according to an embodiment of the present invention.
12 is a conceptual diagram illustrating position information correction of a pen tip using tilt information of a stylus pen according to an embodiment of the present invention.
FIG. 13 is an exemplary diagram illustrating a right-handed menu bar appearance state of a digitizer implementing a UI using slant information of a stylus pen according to an embodiment of the present invention.
FIG. 14 is a diagram illustrating an example of a left-handed menu bar emerging state of a digitizer for implementing a UI using tilt information of a stylus pen according to an embodiment of the present invention.
FIG. 15 is an exemplary view illustrating a handwriting implementation of a different thickness according to an inclination of a stylus pen of a digitizer implementing a UI using information of a stylus pen according to an exemplary embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, advantages and features of the present invention and methods of achieving them will be apparent from the following detailed description of embodiments thereof taken in conjunction with the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, And advantages of the present invention are defined by the description of the claims.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprises "and / or" comprising ", as used herein, unless the recited component, step, operation, and / Or added.

FIG. 2 is a perspective view illustrating a digitizer using tilt information of a stylus pen according to an embodiment of the present invention, FIG. 3 is an exemplary view showing a magnetic force measurement of a sensor according to an embodiment of the present invention, FIG. FIG. 7 is a conceptual diagram illustrating a method of calculating a stylus pen inclination value of a sensor according to an example.

The digitizer using the tilt information of the stylus pen according to the embodiment of the present invention includes a magnetic body 111 and is disposed on the outer surface of the stylus pen 110 and the touch screen 104 for generating a magnetic field on the top of the touch screen 104 And sensors 106a, 106b, 106c, and 106d that detect the three-dimensional vector of the lines of magnetic force formed by the stylus pen 110 and calculate the tilt value of the stylus pen 110. [

The stylus pen 110 according to the embodiment of the present invention includes a magnetic body 111 disposed in the housing and the magnetic body 111 is made of a metal such as a neodymium alloy, an iron alloy, a samarium alloy, a cobalt alloy, a platinum alloy, a manganese alloy, , A barium alloy, and a nickel alloy. Further, the stylus pen 110 can be formed into a cylindrical shape, a conical shape, a conical shape, a tubular shape, a spherical shape, a hemispherical shape, a square shape and the like.

3, the magnetic body 111 inside the stylus pen 110 according to the embodiment of the present invention forms a magnetic force line to the outside and includes a plurality of sensors (for example, a three-axis sensor disposed at the edge of the touch screen 140 106a, 106b, 106c, and 106d sense the three-dimensional vector in the tangential direction of the magnetic force lines.

That is, with respect to the lines of magnetic force formed from the stylus pen 110 including the magnetic body 111, the respective sensors 106a, 106b, 106c, and 106d, which are three-axis magnetic field sensors, measure the magnetic force in the form of a three-dimensional vector.

According to the embodiment of the present invention, the slope values measured by the plurality of sensors 106a, 106b, 106c, and 106d are combined to finally obtain the three-dimensional slope value of the stylus pen. As an example, the inclination value measurement of the stylus pen 110 using the third and fourth magnetic field sensors 106c and 106d among the four sensors 106a, 106b, 106c, and 106d disposed on the outer surface of the touch screen 104 .

When the stylus pen 110 touches the upper surface of the touch screen 104 in a tilted state, the position of the pen tip contacted on the touch screen 104 is output, thereby enabling the position of the pen tip to be recognized Do.

Each of the sensors 106c and 106d measures a magnetic line of force in the form of a three-dimensional vector as described above with reference to FIG. 3 and measures the magnetic force lines up to the tip of the stylus pen 110, which contacts the upper surface of the touch screen 104, A virtual plane perpendicular to the straight line is formed, and a three-dimensional vector measured by each sensor is projected onto a virtual plane.

)은 가상의 평면에 프로젝션되어, 터치스크린(104)의 상면을 기준으로, 스타일러스 펜(110)의 팁을 지나고 자성체의 중심을 관통하는 가상의 선(L1)과 같은 기울기를 가지는 Θ₃를 측정한다. In other words, the magnetic field lines of the three-dimensional vector form measured by the third magnetic field sensor 106c

Is projected on a virtual plane to measure Θ ₃ having a slope such as an imaginary line L 1 passing through the tip of the stylus pen 110 and passing through the center of the magnetic body with respect to the upper surface of the touch screen 104 do.

On the same principle, the magnetic force lines of the three-dimensional vector form measured by the fourth magnetic field sensor 106d are projected on a virtual plane, passing through the tip of the stylus pen 110 on the basis of the upper surface of the touch screen 104, ₄ that has the same slope as the hypothetical line L1 passing through the center of the line.

According to the embodiment of the present invention, the tilt value of the stylus pen is measured using at least two sensors, and the tilt value of the stylus pen is synthesized three-dimensionally to calculate the three-dimensional tilt value of the stylus pen 110.

The digitizer using the tilt information of the stylus pen 110 may calculate a tilt value calculated by a plurality of sensors (for example, 106c and 106d) disposed on the outer surface of the touch screen 104 It combines the Θ ₃ and Θ ₄₎ shown in further comprising a control unit for calculating a three-dimensional inclination value of the stylus 110, the controller sends a control command signal preset with respect to the calculated three-dimensional slope.

For example, when the control unit determines that the user holds the stylus pen with his or her right hand using the three-dimensional gradient value and touch input, the control unit transmits a control command signal to the display unit to move the menu bar to the left side of the touch screen, When it is determined that the stylus pen is held by the left hand and touch input is performed, a control command signal is transmitted to the display unit so that the menu bar is displayed on the right side of the touch screen.

That is, according to the embodiment of the present invention, it is possible to provide a UI that increases the convenience of the user by calculating the tilt value of the stylus pen 110.

Due to the structure of the digitizer, the user can feel a sense of heterogeneity due to the input of pen-chip when the stylus pen is touched by the cover glass disposed between the pen tip and the screen. As a further example, It is possible to correct the pen tip and the point on the screen by using the tilt information of the stylus pen.

With the introduction of digitizers, Palm Rejection technology is being developed, which ignores normal finger touch or electrostatic touch when inputting to the touch screen using a stylus pen.

In other words, by palm rejection, which prevents misunderstanding due to a hand or other contact while using the stylus pen, even if the user draws a handwriting or draws a picture with the stylus pen, .

In order to implement the palm refutation, it is necessary to distinguish the signal input by the pen tip and the signal input by touching the palm or the finger. For this purpose, it is a prerequisite to recognize the accurate touch point of the pen tip.

Hereinafter, a digitizer using slope information of a stylus pen applied to a palm reflexion implementation according to an embodiment of the present invention will be described.

FIG. 5 is a conceptual diagram showing a magnetic force line and a back magnetic field line formed by a stylus pen according to an embodiment of the present invention. A stylus pen 110 incorporating a magnetic body 111 forms magnetic force lines 108 at both ends, (107) is formed.

When the stylus pen 110 is vertically installed on a panel in which the three-axis magnetic field sensors 106a, 106b, 106c, and 106d are formed on the outside of the touch screen, a magnetic force line and an equal magnetic force line are formed as shown in FIG.

When the magnetic force lines and the equal magnetic force lines shown in Fig. 6 are projected on the touch screen 104 and displayed, the shape becomes as shown in Fig.

In this case, it is possible to calculate the touch position of the stylus pen. When the stylus pen 110 is touched on the touch screen 104 as shown in FIG. 8, a constant magnetic force line is formed around the pen, Each of the sensors 106a, 106b, 106c, and 106d shown in FIG. 6A measures the magnitude of the magnetic line of force as a vector value.

When these sensors 106a, 106b, 106c, and 106d convert the three-dimensional vector into a magnitude value, it is possible to measure the magnitude of the magnetic force obtained from each sensor.

The characteristics of the magnetic force magnitude according to the distance from each sensor to the magnetic body are the same as those shown in the graph of FIG. 10. Therefore, after the characteristic curve is estimated, the sensors 106a, 106b, 106c, It is possible to measure the distance from the stylus pen 110 to the stylus pen 110.

11 is a conceptual diagram illustrating touch location recognition using a triangulation method according to an embodiment of the present invention. When the distance from three or more sensors to the stylus pen is known, the position of the stylus pen is determined by a general triangulation method It is possible to grasp.

12 (a), when the stylus pen 110 is tilted with respect to the touch screen 104, the distribution of the equal magnetic force lines on the touch screen 104 is distorted .

Therefore, as shown in Figs. 12 (b) and 12 (c), there is a problem that the stylus pen tip that is actually touched on the touch screen is misdirected to the position P2 shifted from the position P1 do.

In order to implement the palm reflexion, the value obtained by tracing the position of the stylus pen 110 using magnetic lines of force should be close to the position P1 corresponding to the true value measured by the actual touch.

However, the more the stylus pen 110 is tilted, the more difficult it is to trace this actual position.

Therefore, the digitizer using the tilt information of the stylus pen according to the embodiment of the present invention calculates the three-dimensional tilt value of the stylus pen using the measured three-dimensional vector, and when the stylus pen is tilted to a predetermined reference or more, And when it is in contact with the upper surface, the contact position information is corrected using the calculated three-dimensional slope value.

Thereby, it is possible to correct the misjudged position P2 and correct the touch position of the stylus pen closer to the actual position P1. In this process, the tilt value of the stylus pen is calculated on the basis of the misidentified position (P2), so that some errors may occur. However, considering the size of the touch screen of a commonly used digitizer, Since the distance is limited, it is possible to expect the effect that it is possible to track the exact position where the actual stylus pen touches the touch screen as a preliminary step for the implementation of the palm rejection.

The digitizer for implementing the UI using the tilt information of the stylus pen according to another embodiment of the present invention includes a magnetic body and includes a stylus pen 110 for generating a magnetic field on the touch screen 104, And sensors 106a, 106b, 106c, and 106d disposed on the outer surface to sense the three-dimensional vector of the lines of magnetic force formed by the stylus pen 110 and calculate the tilt value of the stylus pen 110. [

The digitizer for implementing the UI using the tilt information of the stylus pen according to another embodiment of the present invention calculates the tilt value calculated by the sensors 106a, 106b, 106c, and 106d, And a control unit for acquiring a slope value and transmitting a predetermined control command signal accordingly. It is preferable that the control unit according to another embodiment of the present invention is arranged to be included in the circuit board inside the digitizer body.

The controller according to an embodiment of the present invention transmits a command signal for controlling the position of the menu bar displayed on the touch screen 104 when the obtained three-dimensional slope value is equal to or greater than a preset value.

13 and 14 are views showing an application example of a UI implementation according to this embodiment. As shown in FIG. 13, the stylus pen 110 transmits the control command signal to the left side of the touch screen 104 so as to activate the menu bar. Further, as shown in Fig. When the control unit detects that the stylus pen 110 is operated by the left hand using the stylus pen 110 through the 3D slope value obtained by the control unit according to the embodiment of the present invention, Signal.

According to one embodiment of the present invention, a user can use a menu bar placed in an easy-to-touch area as the user grasps and operates the stylus pen with his or her left or right hand, thereby increasing user convenience.

According to the second embodiment of the present invention, the control unit transmits a control command signal for adjusting the thickness information of the handwriting input by the stylus pen according to the obtained three-dimensional slope value of the stylus pen.

FIG. 15 is a diagram showing an application example of the UI implementation according to the second embodiment. In the case where the stylus pen 110 is input at almost right angles to the touch screen (? ₁ ), the thickness of the line through the input is made thin And when the stylus pen 110 is tilted with respect to the touch screen (? ₂ ), the thickness of the line through the input is thickened and displayed.

When drawing a line on a piece of paper using a common pencil or colored pencil, drawing a line by tilting the pencil or colored pencil increases the area that the pencil lead touches the paper, so that it is possible to draw a thick line while drawing a line by drawing a pencil or colored pencil It is possible to draw a thin line by touching only part of the paper.

That is, according to the second embodiment of the present invention, even if the user senses the pressure information applied to the touch screen 104 using the stylus pen 110 and does not adjust the thickness of the line, the degree of tilting of the stylus pen 110 The thickness of the line can be adjusted in accordance with the shape of the stylus pen 110. Therefore, even when the stylus pen 110 is used by the user, it is possible to provide an actual feeling of being drawn on paper using a pencil or colored pencil.

The embodiments of the present invention have been described above. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

104: touch screen 106: sensor
110: stylus pen 111: magnetic substance

Claims (13)

A stylus pen including a magnetic body and generating a magnetic field at an upper portion of the touch screen; And
And a plurality of sensors disposed on an outer surface and a rear surface of the touch screen to sense a three-dimensional vector of magnetic force lines formed by the stylus pen,
The sensor recognizes the touch position of the stylus pen tip contacting the upper surface of the touch screen through the touch screen, calculates a straight line connecting the touch position and the position of each sensor, And projecting the three-dimensional vector sensed by the sensor onto the virtual plane to calculate a tilt value of the stylus pen
In digitizer that uses the tilt information of the stylus pen.
The method according to claim 1,
Wherein the stylus pen includes at least one of a neodymium alloy, an iron alloy, a samarium alloy, a cobalt alloy, a platinum alloy, a manganese alloy, a bismuth alloy, a barium alloy, and a nickel alloy, the magnetic material being disposed in a housing
In digitizer that uses the tilt information of the stylus pen.
delete delete A stylus pen including a magnetic body and generating a magnetic field at an upper portion of the touch screen;
A sensor disposed on an outer surface of the touch screen for sensing a three-dimensional vector of a magnetic force line formed by the stylus pen and calculating a tilt value of the stylus pen; And
And a controller for calculating a three-dimensional slope value of the stylus pen by synthesizing slope values calculated by a plurality of sensors disposed on an outer surface of the touch screen,
Wherein the control unit controls the stylus pen so that the contact position information on the upper surface of the touch screen of the stylus pen using the calculated three-dimensional slope value when the stylus pen is tilted to a predetermined reference or more and touches the upper surface of the touch screen, Performing a calibration algorithm
In digitizer that uses the tilt information of the stylus pen.
6. The method of claim 5,
The control unit may be configured to transmit a predetermined control command signal to the calculated three-dimensional slope value
In digitizer that uses the tilt information of the stylus pen.
delete A stylus pen including a magnetic body and generating a magnetic field at an upper portion of the touch screen;
A sensor disposed on an outer surface of the touch screen to calculate a tilt value of the stylus pen; And
And a controller for calculating a slope value calculated by the sensor to obtain a three-dimensional slope value of the stylus pen and transmitting a predetermined control command signal,
Wherein the sensor measures the tilt value by measuring an angle between the tip of the stylus pen and a virtual line passing through the center of the magnetic body and the touch screen,
The sensor calculates a straight line extending from itself to the tip of the stylus pen contacting the touch screen, forming a virtual plane perpendicular to the straight line, projecting the sensed three-dimensional vector onto the virtual plane, To calculate the tilt value of the pen
A digitizer that implements the UI using the slope information of the in-stylus pen.
9. The method of claim 8,
Wherein the stylus pen includes at least one of a neodymium alloy, an iron alloy, a samarium alloy, a cobalt alloy, a platinum alloy, a manganese alloy, a bismuth alloy, a barium alloy, and a nickel alloy, the magnetic material being disposed in a housing
A digitizer that implements the UI using the slope information of the in-stylus pen.
delete delete 9. The method of claim 8,
Wherein the controller transmits a menu bar position control command signal to control the position where the menu bar on the touch screen is generated when the obtained three-dimensional slope value is equal to or greater than a predetermined value
A digitizer that implements the UI using the slope information of the in-stylus pen.
9. The method of claim 8,
The control unit transmits a control command signal for adjusting the thickness information of the handwriting input by the stylus pen according to the obtained three-dimensional slope value
A digitizer that implements the UI using the slope information of the in-stylus pen.

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