WO2013005949A2

WO2013005949A2 - Multitouch recognizing device

Info

Publication number: WO2013005949A2
Application number: PCT/KR2012/005172
Authority: WO
Inventors: 안석민; 한홍희; 정구범
Original assignee: 주식회사 알엔디플러스
Priority date: 2011-07-01
Filing date: 2012-06-29
Publication date: 2013-01-10
Also published as: WO2013005949A3

Abstract

The present invention relates to a multitouch recognizing device for distinguishing an illusion from an actually touched position and an illusion position by using an inclination angle measuring method, minimizing time for measuring a touch position, and more accurately measuring the position.

Description

Multi-touch recognition device

According to the present invention, the touch measurement signal can be distinguished from the actual touched position and the virtually touched virtual image in the touch screen device for measuring the position of various objects by determining the path of infrared rays on the touch surface through infrared rays. In addition, the present invention relates to a multi-touch recognition device that improves the touch measurement operation speed so that a user can accurately recognize a touch position even if the touch position changes rapidly.

Infrared touch measures the position of the object according to whether or not it is received by the infrared radiation by the object by the array of infrared transmitter touch signal measuring unit arranged.

The infrared signal used in this method radiates an AC signal of tens to hundreds of KHz, and then measures the magnitude of the signal by averaging the collected AC signals according to the presence or absence of an object.

This method introduces limitations in sensitivity and overall response speed due to the time for averaging the collected alternating signals and the remarkable degradation of the frequency response of the infrared touch measurement signal receivers by high frequency signals. Interfering with each other, the receiver cannot expect to receive the correct signal, and therefore, it is impossible to calculate the exact coordinates, and when the infrared signal is emitted between the light emitting unit and the light receiving unit, it is impossible to determine the presence or absence of an object in the hidden coordinates. There was a problem that virtual image coordinates are generated.

In order to solve this problem, Korean Patent No. 10-1018397 proposes an apparatus and a method for removing a virtual image, and accordingly, multi-touch is detected after performing a first scan control mode to remove the virtual image. If so, the second scan control mode must be performed separately.

14 is a schematic configuration diagram of an infrared touch screen device capable of removing a virtual image disclosed in Korean Patent No. 10-1018397.

However, according to the method disclosed in Korean Patent No. 10-1018397, even though the actual multi-touch occurs in the first scan control mode, it may not be properly recognized.

In detail, according to the method disclosed in Korean Patent No. 10-1018397, when a new touch occurs, if it is recognized as a multi-touch after performing the first scan control mode, the second scan control mode is driven to determine a virtual image of the multi-touch. If the multi-touch moves frequently or quickly, even if a new multi-touch occurs while the second scan control mode is performed, the second scan control mode is in progress and thus the new scan is not switched to the first scan control mode. There is a problem that can not measure the multi-touch.

The present invention has been proposed to solve the above problems, and to provide a multi-touch recognition device capable of distinguishing a position of a virtual image from a position actually touched when a multi-touch occurs in the touch screen device.

In addition, the present invention has been proposed to solve the above problems, to provide a multi-touch recognition device that can distinguish the virtual image by using the inclination angle measurement method.

In addition, the present invention is to provide a multi-touch recognition device that minimizes the time for measuring the touch position.

According to an aspect of the present invention, there is provided a multi-touch recognizing apparatus including: a plurality of transmitter group units grouping a touch measurement signal transmitter for transmitting radially continuous touch measurement signals toward a receiving module group unit; A plurality of receiving module group units having a plurality of receiving modules having at least three or more receiving modules to simultaneously receive the measurement signals transmitted from the transmitter group unit at right, acute, and obtuse angles at respective right, acute, and obtuse angles; A transmitter driving clock unit providing a driving clock to simultaneously drive touch measurement signal transmitters having the same index included in each of the transmitter group units; A control unit for calculating a size of an x, y coordinate or diameter of the touch area using the touch measurement signals received by the plurality of receiving module group units; And a touch panel configured to receive a touch input from the user.

Another multi-touch recognition device according to the present invention for achieving the above object is a transmitting module including one or more transmitting elements for radially transmitting a touch measurement signal including a pulse; A receiving module including one or more receiving elements for receiving the touch measurement signal transmitted from the transmitting module; A controller configured to calculate a size of a coordinate or diameter of a touch area from the touch measurement signal received by the receiving module; And a touch panel configured to receive a touch input from a user, wherein the receiving device positioned at right, obtuse, and acute angles of the touch measurement signals radially transmitted from the transmitting device receives the touch signals at right, acute, or obtuse angles continuously. Characterized in that the multi-touch recognition device.

The multi-touch recognizing apparatus according to the present invention having the above-described configuration can effectively distinguish between the position of the multi-touch and the position of the virtual image when the multi-touch occurs in the multi-touch screen device, and the multi-touch of the tilt angle measuring method. By using the position measuring method and the reference coordinate calculation method, it is possible to efficiently distinguish the virtual image, and by minimizing the time for measuring the multi-touch position, it is possible to effectively measure the multi-touch even if it moves or changes quickly.

1 is a schematic block diagram of a multi-touch recognition device according to an embodiment of the present invention.

2 to 3 are diagrams for explaining a principle of recognizing touch points in the multi-touch recognition apparatus according to the present invention.

FIG. 4 is another diagram for describing a principle of recognizing a touch point when a specific touch transport module has failed in the multi-touch recognition device according to the present invention.

5 is a flowchart illustrating a process of distinguishing a point actually touched and a touch point of a virtual image in the multi-touch recognition apparatus according to the present invention.

6 is a view for explaining the principle of removing the virtual image by the transmission angle of the touch measurement signal transmission unit in the multi-touch input position recognition apparatus according to the present invention.

7 to 10 are views for explaining a process of removing a virtual image by the transmission angle of the touch measurement signal transmission unit in the multi-touch recognition device according to the present invention.

FIG. 11 is a block diagram illustrating a touch measurement signal receiver in a modular form according to another exemplary embodiment of the multi-touch recognition apparatus according to the present invention.

FIG. 12 is a diagram for describing an operation of a multi-touch recognition device including a touch measurement signal receiver in a modular form of the present invention.

13 is a view for explaining the principle that the receiver module is interlocked with each other in the adjacent transport module group.

14 is a schematic configuration diagram of a multi-touch screen device according to the prior art.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, "... part," ... described in the specification. module", "… The term “element” and the like refer to a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

1 is a schematic configuration diagram of a multi-touch device according to the present invention.

Multi-touch recognition device according to an embodiment of the present invention X-axis touch measurement signal receiver 110, X-axis touch measurement signal transmitter 120, Y-axis touch measurement signal receiver 130, Y-axis touch measurement signal transmitter 140, an X-axis receiver driver 111, an X-axis transmitter driver 121, a Y-axis receiver driver 131, a Y-axis transmitter driver 141, and a controller 230.

At least two or more X-axis touch measurement signal receivers 110 are continuously arranged to form an entire receiver to receive infrared rays transmitted from the transmitter. At least two or more X-axis touch measurement signal transmitters 120 are continuously arranged to transmit the touch measurement signal to the touch plane at the X-axis touch measurement signal receiver 110.

At least two or more Y-axis touch measurement signal receivers 130 are continuously arranged to form an entire receiver to receive infrared rays transmitted from the transmitter. At least two or more Y-axis touch measurement signal transmitters 140 are continuously arranged to transmit a touch measurement signal to the touch plane at the Y-axis touch measurement signal receiver 130.

The X and Y

axis transmitter drivers

121 and 141 drive the X and Y axis touch

measurement signal transmitters

120 and 140 at regular time intervals to convert touch measurement signals, for example, infrared signals, into the touch plane of the multi-touch screen. The X, Y-

axis receiver drivers

121 and 141 drive the X- and Y-axis touch

measurement signal receivers

110 and 130 at regular time intervals, for example, an infrared signal and an external noise signal. For example, it may receive sunlight, low frequency noise, and the like.

Although the infrared signal is exemplified as the touch measurement signal, it should be noted that the RF signal and the LED emission signal may also be used as the touch measurement signal.

1 illustrates a structure in which a transmitter and a receiver are disposed to face each other, that is, a structure in which only one transmitting module is arranged on one side and only a receiving module is arranged on the other side, but the transmitting and receiving modules are alternately arranged on both sides as necessary. Note that it is also possible.

The controller 150 processes the touch measurement signal received by the X-axis touch measurement signal receiver 110 and the Y-axis touch measurement signal receiver 130 to calculate characteristics of the touched point on the touch panel by the user.

As a characteristic of the touched point, the diameter may be calculated as an example of the size of the touched point as well as the coordinates of the X-axis and the Y-axis.

The entire X-axis touch measurement signal receiver 110 and the X-axis touch measurement signal transmitter 130 according to the present invention include N transmitters and receivers on the horizontal axis, and Y-axis touch measurement signal receiver 120 and Y-axis touch measurement. The signal transmitter 140 has M transmitters and receivers arranged on the vertical axis.

As another example, when the X-axis touch measurement signal receiver 110 and the X-axis touch measurement signal transmitter 130 are alternately arranged, the X-axis touch measurement signal receiver 110 and the X-axis touch measurement signal transmitter 130 The total number of N is 2N, N is arranged on one side of the horizontal axis, N is arranged on the other side of the horizontal axis, the number of Y-axis touch measurement signal receiver 120 and Y-axis touch measurement signal transmitter 140 The sum total is 2M and M pieces are arranged on one side of the vertical axis and M pieces are arranged on the other side of the vertical axis.

In the multi-touch recognition apparatus according to the present invention having the above structure, a method of calculating the characteristics of the touch point, that is, the coordinates and the size of the touch area, will be described.

First, the magnitude of the infrared light received by the horizontal axis (X-axis) touch measurement signal receiver facing each other is X (0), the magnitude of the infrared light received by the second touch measurement signal receiver is X (1), and the third touch measurement signal. The size of the infrared light received at the receiving unit is X (2), the size of the infrared light received at the receiving unit of the kth receiving module is X (k-1), and the size of the infrared light received at the receiving unit of the Nth receiving module is X ( N-1).

Vertical axis (Y-axis) The amount of infrared light received by the receiver of the receiving module is Y (0), the amount of infrared light received by the receiver of the second receiving module is Y (1), and the infrared light is received by the receiver of the third receiving module. The size of the light is defined as Y (2), the size of the infrared light received at the receiving unit of the kth receiving module is Y (k-1), and the size of the infrared light received at the receiving unit of the Mth receiving module is defined as Y (M). .

Each X-axis touch measurement signal receiver receives 0 to N-1th values and Y (k) from 0 to M to determine whether the touch measurement signal sent from the transmitter to recognize the touch input has been interfered by the object. Perform a scan that sequentially measures the -1 value.

When X (k-1) and Y (k-1) are received values of the touch measurement signal received from the touch measurement signal receiving unit through the kth scan, k is 1 to N for the X axis and 1 to N for the X axis. With respect to, from 1 to M, the entire touch measurement signal receiver receives the received value of the touch measurement signal according to each scan and uses this value to multiply the objects that obstruct the movement of the touch measurement signal transmitted by the touch measurement signal transmitter. Find the coordinates and diameters of these objects.

First, the received value of the touch measurement signal is normalized through equations (1) through (2).

Equation 1

Here, n is a natural number such as 1 or 2, which determines whether the response of the noise component of the signal is linear or nonlinear. When n = 1, it is advantageous to calculate a signal having a low background noise component. The case of n> 1 is an advantageous measurement method when there are many base noise signals.

G is a scaling value and is generally set to 1 or 100. The measured value obtained in Equation 1 is a normalized value of the measured value on the X axis. The Y-axis can also be obtained in the same way as the X-axis.

Equation 2

The measured value obtained in Equation 2 is a normalized value of the measured value on the Y axis.

In the above description, X _max and Y _max are defined as the largest values of the touch signals measured on the X and Y axes, respectively.

Formulas for obtaining the coordinates of the touch area by using the normalized measured values are shown in Equations 3 and 4 below.

The X coordinate corresponding to the nth is obtained by the following equation (3), and the Y coordinate is obtained by the following equation (4).

Equation 3

Equation 4

I is a natural number from 0 to N, j is a natural number from 0 to M, w is the number of X-axis touch area receivers, and h is the number of Y-axis touch area receivers.

On the other hand, the formula for calculating the diameter of the touch area by using the normalized measurement value is as shown in Equations 5 and 6.

That is, the diameter of the X coordinate corresponding to the nth is obtained by the following equation (5), and the diameter of the Y coordinate is obtained by the following equation (6).

Equation 5

Equation 6

Meanwhile, in the multi-touch input location recognizing apparatus of the present invention, in order to recognize a touch area, N _x (k) and N _y (k), which are normalized measured values measured by the touch measurement signal receiver, are calculated, and this value is the first reference value. Measure the case of greater than T _lower , wherein at least one of these values is from the equations 3 to 3 from successive values that meet the conditions of the second reference value T _higher > N _x (k), N _y (k) Find the coordinates and diameter through 6.

In the above equation, W = S / N and H = S / M, where S is the maximum resolution of the screen, N and M are the number of touch measurement signal receivers on the X and Y axes, respectively.

In another embodiment, the validity of the touch coordinate may be determined by measuring a probability density value in the touched area.

In more detail, the probability density measurement values of the touch area are defined as shown in Equations 7 and 8.

Equation 7

Equation 8

The values determined by the specific probability density function according to Equations 7 and 8 may be set to the first reference value T _lower and the second reference value T _higher used in Equations 3 to 6.

2 to 3 are diagrams for explaining a principle of recognizing touch points in a multi-touch recognition apparatus according to the present invention, and FIG. 5 is a diagram illustrating a method of distinguishing a touch point from a virtual touch point according to a first embodiment of the present invention. A flow chart showing the process.

Hereinafter, a process of distinguishing a point actually touched and a touch point of a virtual image in the multi-touch recognition apparatus according to the present invention will be described with reference to FIGS. 2 to 3.

First, the touch measurement signal receiver measures a maximum value of the touch measurement signals transmitted from the touch measurement signal transmitter, that is, values corresponding to X _max (k) and Y _max (k) (S501).

It is determined whether the measurement of X _max (k) and Y _max (k) is completed, and when it is completed (step S502), the process moves to step S503. In operation S502, the measurement value is considered to be that an object that obstructs infrared rays does not exist on the touch surface.

In operation S503, it is measured whether the touch measurement signal is received by the touch measurement signal receiver. In other words, each touch measurement signal receiver measures X (k) and Y (k).

If it is determined in step S504 whether the measurement is complete, and moves to step S505.

In operation S505, a variable used to measure a value of the touch area, that is, a coordinate and a diameter, is initialized. That is, each variable is set to n = 0, m = 0, w = 0, h = 0, i = 0, j = 0.

In the above, n is the number of coordinates and diameters of the touch points obtained on the X axis, m is the number of coordinates and diameters of the touch points obtained on the Y axis, and i is an index of the sensor part value X (k) of the X axis from 0. Where N is the index of the sensor unit value Y (k) on the Y axis from 0 to M, where W = S / N and H = S / M, where S is the maximum resolution of the screen.

In step S506, the equations (1) and (2) are calculated.

In step S507, the normalized N _x (k) and N _y (k) are calculated, and the corresponding value for calculating the case where the value is larger than the first reference value T _lower is moved to step S511. If it is not greater than the first reference value T _lower , the flow proceeds to step S508.

In step S508 it is determined whether the W and H values are zero, and if it is not zero, it is determined that there is a press on the touch and moves to step S514 for final coordinate calculation. If zero, go to step S509.

In step S509, W and H are initialized, and x (n) and y (m) are calculated using Equations 3 and 4 above.

In step S510, W and H are initialized, and dx (n) and dy (m) are calculated by using Equations 5 and 6.

In step S511, when the first reference value T _lower among the N _x (k) and N _y (k) values measured in step S507 is determined to be an interference to the touch measurement signal, the values of w and h are increased by one. .

In step S512, if the calculated coordinates and diameters are limited, for example, a condition that is not recognized as a touch by one or more limitations of a specific diameter is determined, and if the determination result is satisfied, the process moves to step S513. Delete the coordinate information and go to step S514. The condition measurement may be a determination condition as in Equations 7 and 8 above.

In step S513: the index values of n and m are increased by one, and in step S514, the index values of i and j are increased by one.

In operation S515, the measurement of the touch measurement signal is completed at the coordinate of n × m, and only the coordinates of the actual touch point are distinguished by removing the virtual image from which the presence or absence of an object cannot be measured.

When the touch down state, the coordinates are transmitted to the information device and the process moves to step S503 to measure new coordinates.

In step S520, if i = (N-1) satisfies the condition of j = (M-1), and if it satisfies, it is determined that measurement values for all touch measurement signals are completed. If not, go to step S506 and measure the next N _x (k) and N _y (k).

If the touch-up continues for a certain time, the process moves to step S501 to re-measure X _max (k) and Y _max (k), otherwise go to step S503.

In operation S507 of FIG. 5, only a touch area that satisfies Equations 9 and 10 below may be executed.

Equation 9

Equation 10

Here, Sx (i) and Sy (i) are matching filters of a predefined matching touch pattern, and l is a sampling number of the matching filter.

The reason for applying the matching filter as described above is to improve the recognition rate of the touch area by allowing only a specific touch pattern among the measured touch area values to be recognized as a touch.

FIG. 4 is another diagram for describing a principle of recognizing a touch point when a specific touch transport module is faulty in the multi-touch input location recognizing apparatus according to the present invention.

In general, when the infrared touch signal transmission unit is defective, it is not possible to determine whether there is a touch. Therefore, in order to solve the impossibility of measuring the signal due to such a device failure, as shown in FIG. 4 in S506 of FIG. 5, when the k-th hand touch measurement signal transmitter is in failure, that is, X _max (k) = 0 and Y _max ( If k) = 0, then N _x (k) and N _y (k) are replaced by N _x (k-1) and N _y (k-1) as N _x (k) = N _x (k-1) By calculating the coordinates by substituting the values, malfunction of the touch screen due to a failure can be prevented.

FIG. 6 is a diagram illustrating a principle of removing a virtual image by a transmission angle of a touch measurement signal transmitter in the multi-touch recognition apparatus according to the first embodiment of the present invention.

7 to 10 illustrate a process of removing a virtual image by a transmission angle of a transmission measurement signal transmission unit in a multi-touch recognition apparatus according to a first embodiment of the present invention.

In order to remove the virtual images of multi-coordinates in the touch screen arranged in a matrix form, a method of determining whether there is an object in the path at the transmission angle of the touch measurement signal transmitting unit as shown in FIG. 6 and measuring the third coordinate will remove the virtual image. . The virtual image removal method is processed in step S515 of FIG. 7.

In FIG. 7, when the touch measurement signal is transmitted from the k + d-th touch measurement signal transmitter, the touch measurement signal receiver that receives the transmitted touch measurement signal measures X (k) by scanning at an oblique angle so as to be the k-th.

Similarly, when the touch measurement signal is transmitted from the k-th touch measurement signal transmitter, the touch measurement signal receiver that receives the infrared radiation is scanned at an oblique angle to be k + d-th, and measures X (k + d).

In this case, referring to FIG. 7, in the moving path of the touch measurement signal transmitted from the touch measurement signal transmitter to remove the virtual images from the touch surfaces arranged in a matrix form, the distance from the touch measurement signal receiver of the area actually touched. It describes a method of removing a virtual image by determining whether the object is obstructed or not, and measuring the third coordinates described below. The virtual image removal method is processed in step S715 of FIG. 7.

In FIG. 9, when the touch measurement signal is transmitted from the k + d-th touch measurement signal transmitter, the receiver receiving the transmitted touch measurement signal scans at an oblique angle so as to be k-th, and measures.

In FIG. 8, when the touch measurement signal is transmitted from the k-th touch measurement signal transmitter, the receiver measures the touch position by scanning at an oblique angle so as to be the k + d-th.

In this case, distances from the touch measurement signal receiver of the area actually touched in FIG. 7 are y (n), y (n + 1) [ _yT (n), y _{T + 1} (n) in FIG. 7, respectively). Is obtained by the following equations (11) and (12), respectively.

Equation 11

Equation 12

Where W _T = S / d, S is the resolution of the X axis, and d is a factor that determines the angle of the comb angle when scanning with the comb.

To remove the Ghost Image, the following steps are realized.

First, as shown in FIG. 8, the touch measurement signal is transmitted in the perpendicular direction to measure the coordinates of the touch area. In this case, if the objects A, B, and C forming the multipoint are placed on the touch surface, the Cartesian coordinates of A, B, C, and D are measured without distinguishing the virtual image B. However, FIGS. 9 and 10 show actual oblique angles. Multi-point scanning with a signal shows that only the touch objects A, C, and D are measured, but the virtual image B is not measured.

Next, as shown in FIG. 9, the touch measurement signal is transmitted from the touch measurement signal transmitter so as to have an oblique angle to the left direction, that is, the touch measurement signal has an obtuse angle with respect to the lower surface of the receiver, and the touch measurement transmitted from the touch measurement signal transmitter The coordinates of the touch area are measured by scanning the signal.

The slope coordinates corresponding to the coordinates including the virtual image measured through the rectangular coordinates are calculated by the following equations (13) and (14).

The rectangular coordinates are rectangular coordinates [x ₀ (n) and y ₀ (m)] measured when the touch object is actually scanned at right angles as shown in FIG. 8. The tilt coordinates (X _TC , Y _TC ) corresponding to the coordinates including the virtual image are touch objects when the rectangular coordinates [x ₀ (n) and y ₀ (m)] are simulated as shown in FIGS. 9 and 10. Is converted to the slope coordinate (X _TC , Y _TC ) that is expected to exist through the equation. That is, the following equation is converted to the slope coordinate including the virtual image included in the rectangular coordinates.

Equation 13

Equation 14

The coordinates X _{T and} Y _T obtained through scanning by the converted tilt coordinate values X _TC and Y _TC calculated by Equations 13 and 14 and the touch measurement signal transmitted at an actual oblique angle as shown in FIG. 8. ) And the distance between the and ().

Equation 15

Equation 16

In the above _description , x _o (n) and y _o (n) are coordinates including the virtual image obtained through orthogonal scanning, and X _c and Y _c denote the number of touch measurement signal receivers used.

If D _xr (n) and D _yr (n) are greater than a certain threshold, the coordinates are determined to correspond to the virtual image. The specific limit value above is determined in advance according to the density of the infrared receiver sensor used.

As shown in FIG. 10, the touch measurement signal is transmitted from the touch measurement signal transmitter so that the touch measurement signal has an acute angle with respect to the lower surface of the receiver, and the touch measurement signal receiver scans the received touch measurement signal. The coordinates of the touch area can be measured.

Here, the slope coordinates X _TC and Y _TC corresponding to the coordinates including the virtual image measured through the rectangular coordinates [x _o (n), y _o (m)] are calculated by Equations 17 and 18 below.

Equation 17

Equation 18

The distance between the calculated values (X _TC , Y _TC ) and the coordinates (X _T, Y _T ) obtained through scanning by the touch measurement signal transmitted at an oblique angle is measured by Equations 19 and 20 below.

Equation 19

Equation 20

If D _xl (n) and D _yl (n) are greater than a certain threshold, the coordinates are determined to correspond to the virtual image. The specific limit value above depends on the density of the infrared receiver sensor used.

In the above _description , x _o (n) and y _o (m) are coordinates including a virtual image obtained through orthogonal scanning, and Xc and Yc mean the number of touch measurement signal receivers used.

In the case of scanning at an oblique angle as shown in FIGS. 9 and 10, the touch measurement signal transmitted from the touch measurement signal transmitter is transmitted at a right angle with respect to the surface connected to the touch measurement signal receiver and the receiver in one touch measurement signal transmitter. Care should be taken that the signal and the oblique (oblique or acute) touch signal are transmitted continuously.

That is, in the related art, the touch measurement signals of the right angle are continuously transmitted from all the touch measurement signal transmitters, and then the touch measurement signals of the oblique angle are continuously transmitted again from all the touch measurement signal transmitters. The transmitter transmits the right angle touch measurement signal and the oblique angle touch measurement signal radially at the same time, and the coordinate or diameter of the touch is received by the touch measurement signal received at the receiver at a predetermined angle, that is, an obtuse angle, a right angle, and an acute angle with respect to the corresponding transmitter. The difference is that it computes.

FIG. 11 is a block diagram of a multi-touch input position recognizing apparatus including a touch measurement signal receiver in a modular form according to a second embodiment of the present invention, and FIG. 12 is a multi-touch structure including a touch measurement signal receiver in a modular form according to a second embodiment of the present invention. A diagram for describing an operation of an input position recognizing apparatus.

In the multi-touch input position recognizing apparatus according to the second embodiment of the present invention, the touch position measuring signal transmitted from the touch measuring signal transmitting unit 1160 is radially transmitted at a predetermined angle from the touch measuring signal transmitting unit 1160 and is previously. Three touch measurement signal receivers 1140 located at defined acute angles, right angles, and obtuse angles simultaneously measure the touch position measurement signals, but after modularizing the touch measurement signal receiver 1140 by a predetermined number unit, the receiver module A , B, C) are bundled in a predetermined number unit to be the receiver module group unit 1110.

Meanwhile, the touch measurement signal transmitter 1160 also forms a transmitter group unit 1120 by tying a predetermined number of touch measurement signal transmitters 1160.

The receiver modules A, B, and C each use a touch measurement signal received by the touch measurement signal receiver 1140 included in each receiver module by one receiver

module signal converter

1131, 1132, and 1133 as voltage signals. Convert.

The receiver modules A, B, and C are respectively connected to the A / D converters 1150 for converting voltage signals, which are analog signals, into digital signals, respectively, and output the received values of the touch position measurement signals converted to digital values to the controller. .

Although not shown in the drawing, the transmission driving clock outputs the transmission driver driving clock 1180 such that the touch measurement signal transmission unit 1160 of the same index included in the transmission group group 1120 is simultaneously driven.

The driving clock 1180 of the transmission driving clock unit is supplied to the transmission driver 1170 to drive the touch measurement signal transmitter 1160 to radiate the touch measurement signal radially at a predetermined angle.

An operation of the multi-touch recognition device according to the second embodiment of the present invention having the above configuration will be described with reference to FIG. 12.

The entire touch measurement signal receiver is divided into a predetermined number and divided into receiver module A, B, and C. The receiver module bundled with A, B, and C is further configured by one receiver module group N and N + 1. Also grouped by a predetermined number is composed of the transmitter group unit R _N and R _{N +1} as described above.

When the driving clock CLK of the source driving clock part is supplied to the source driver, the source driver transmits the source of the same index of each source group group R _N and R _{N + 1} specified by the driving clock, that is, R _N ( In n) and R _{N + 1} (n), a touch measurement signal including an acute angle touch measurement signal R2, a right angle touch measurement signal R1, and an obtuse angle touch measurement signal R3 is radiated simultaneously.

In this case, the touch measurement signal transmitted radially from the touch measurement signal transmitter of one transmitter group unit is received in the touch measurement signal receiver constituting the receiver modules A, B, and C, and the controller is radiated from one transmitter. The coordinates or the diameter of the touch are calculated using the touch measurement signal received by the receiver located at a predetermined predetermined angle, that is, obtuse, right angle, and acute angle, among the touch measurement signals.

That is, the transmitter R _N the foot of the (n) touch measurement signal sent out from the bride R _N (n) in the position of the touch measurement signal and a right angle that is received from the touch measurement signal receiving section of the A module in the position of the acute angle to the The controller calculates the coordinates or the diameter of the touch with the touch measurement signal using only the touch measurement signal received by the touch measurement signal receiver of the B module and the touch measurement signal received by the touch measurement signal receiver of the C module at an obtuse position.

The touch measurement signal received by each receiver by the above-described method measures the touch position according to Equations 1 to 20 as described in the first embodiment.

According to the above-described method, according to the second embodiment of the present invention, a touch measurement signal is simultaneously transmitted in a touch measurement signal transmitter having the same index for each transmitter group group (R _N , R _{N + 1} ) and the touch measurement signal receiver is also a receiver. Since at least one touch measurement signal is received for each module (A, B, C), not only can the touch position be measured more quickly than the first embodiment, but also the touch position can be measured more accurately, so that the touch position changes quickly. This can be measured quickly and accurately.

13 is a view for explaining the principle that the receiver module is interlocked with each other in the adjacent transport module group of the second embodiment of the present invention.

As shown in FIG. 13, in the second exemplary embodiment of the present invention, an acute angle touch measurement signal of the touch measurement signals transmitted by the touch measurement signal transmitters of the adjacent transmitter group units 1330 and 1340 is adjacent to the receiver module group unit 1310. Since it may be received by the touch measurement signal receivers in the receiver modules 1311 to 1313 and 1321 to 1323 of 1320, it is irrelevant to which transmitter group units 1330 and 1340 the touch measurement signals are transmitted. In some embodiments, the receiver module of some of the receiver

module group units

1310 and 1320 may be configured to receive at least a touch measurement signal.

In the above example, the example of grouping the receivers has been described with three examples A, B, and C. However, when all receivers are grouped by a predetermined number, one receiver module group unit includes N receiver modules. Can be.

In addition, in the above example, although two receiver module group units are illustrated, two or more receiver module group units may be configured according to the configuration.

Specifically, the entire receiver may be divided into M receiver module group units, one receiver module group unit may be divided into N receiver modules, and one receiver module may include C receivers. Accordingly, if X is the total number of receivers on the X-axis, X = N × M × C is established.

Available in the display industry.

Claims

A plurality of transmitter group units grouping the touch measurement signal transmitters for transmitting radially continuous touch measurement signals toward the receiver module group unit;

A plurality of receiving module group units having a plurality of receiving modules having at least three or more receiving modules to simultaneously receive the measurement signals transmitted from the transmitter group unit at right, acute, and obtuse angles at respective right, acute, and obtuse angles;

A transmitter driving clock unit providing a driving clock to simultaneously drive touch measurement signal transmitters having the same index included in each of the transmitter group units;

A control unit for calculating a size of an x, y coordinate or diameter of the touch area using the touch measurement signals received by the plurality of receiving module group units; And

And a touch panel configured to receive a touch input from a user.
A transmitting module including one or more transmitting elements for radially transmitting a touch measurement signal including a pulse;

A receiving module including one or more receiving elements for receiving the touch measurement signal transmitted from the transmitting module;

A controller configured to calculate a size of a coordinate or diameter of a touch area from the touch measurement signal received by the receiving module; And

It includes a touch panel for receiving a touch input from the user,

A multi-touch recognition device, characterized in that a receiving element located at right angles, obtuse angles and acute angles of a touch measurement signal transmitted radially from a transmitting element receives continuous touch signals at right angles, acute angles or obtuse angles.
The method according to claim 1 or 2,

And the controller calculates a rectangular coordinate obtained from a touch signal received at right angles among the touch coordinates by the following equation.

(From the above,

N x (k): X-axis touch signal measurement value, N y (k): Y-axis touch signal measurement value,

x (n): X-axis touch area coordinates, y (n): Y-axis touch area coordinates,

k: Receive element index, where X is 0 to N, Y is 0 to M,

i: X-axis touch measurement signal receiver index, j: Y-axis touch measurement signal receiver index,

w: number of X-axis touch area receivers, h: number of Y-axis touch area receivers,

W = S / N and H = S / M, where S means the maximum resolution of the screen, and N and M are the number of transmitters of the multi-touch measurement signals on the X and Y axes, respectively.)
The method of claim 3,

And determining whether the virtual image is based on converting the Cartesian coordinates into corresponding inclinations of an acute angle or an obtuse angle.
The method of claim 4, wherein

And determining the virtual image on the basis of the rectangular coordinates based on the obtuse tilt coordinates converted by Equations 13 and 14 below.

[Equation 13]

[Equation 14]

(In the above, X o (n), Y o (n) is a coordinate including a virtual image obtained through orthogonal scanning, X C and Y C is the number of sensors used in each sensor unit, d is acute or obtuse angle) This factor determines the angle of the acute or obtuse angle when scanning, where n is the number of touch objects on the X axis and m is the number of touch objects on the Y axis.)
The method of claim 4, wherein

And determining whether the virtual image is based on the rectangular coordinates converted into acute-angle gradient coordinates by Equation 17 and Equation 18 below.

[Equation 17]

Equation 18

(Where x o (n) and y o (m) are coordinates including a virtual image obtained through orthogonal scanning, and X c and Y c represent the number of touch measurement signal receiving elements used. D is an acute angle or This factor determines the angle of the acute or obtuse angle when scanning at an obtuse angle, where n is the number of touch objects on the X axis and m is the number of touch objects on the Y axis.)
The method according to claim 5 or 6,

And D xr (n) and D yr (n) determined by Equations (15) and (16) below are determined to be virtual images.

[Equation 15]

[Equation 16]

(In the above, X T and Y T are the coordinates of the actual touch object at the oblique angle scan, and X TC and Y TC are the slope coordinates converted from the rectangular coordinates.)
The method according to claim 1 or 2,

The coordinate value measured from the touch area is calculated and used as a normalized touch measurement value (N x (k), N y (k)).
The method of claim 8,

The measured coordinate values of the touch area are normalized by Equations 1 and 2 below.

The normalized measured values N x (k) and N y (k) of the touch area are corrected by Equations 9 and 10 below.

[Equation 1]

[Equation 2]

(From the above,

N x (k): Normalized value of X-axis touch signal measurement value,

N y (k): Y-axis touch measurement signal normalized value,

k: Receive element index, where X is 0 to N, Y is 0 to M,

G: scaling value, natural number from 1 to 100,

n is a natural number such as 1 or 2 that determines whether the response of the noise component of the signal is linear or nonlinear,

X max, Y max: the largest of the touch signals measured on the X and Y axes, respectively)

[Equation 9]

[Equation 10]

(From the above,

P x (k): X axis compensation function value, P x (k): Y axis compensation function value,

S x (i): X-axis matching filter function, Sy (i): Y-axis matching filter function,

k: receiving element index, l: sampling number of matching filter)
The method of claim 9,

Coordinate or diameter of the touch area using a value greater than a predetermined first reference value T lower and smaller than a predetermined second reference value T higher among the normalized values N x and N y of the measured touch signal. Multi-touch recognition device, characterized in that for calculating the size of.
The method of claim 10,

The first reference value T lower and the second reference value T higher are determined by a probability density function calculated by Equations 7 and 8 below.

[Equation 7]

[Equation 8]

(From the above,

T x (k): X-axis probability density function, T y (k): Y-axis probability density function,

i: X-axis receiving element index, j: Y-axis receiving element index,

w: number of X-axis touch area receiving elements, h: number of Y-axis touch area receiving elements,

N x (i): X-axis touch signal measurement value, N y (j): Y-axis touch signal measurement value,

i: X-axis touch measurement signal receiver index, j: Y-axis touch measurement signal receiver index,

w: number of X-axis touch area receivers, h: number of Y-axis touch area receivers,

W = S / N and H = S / M, where S means the maximum resolution of the screen, and N and M are the number of transmitters of the multi-touch measurement signals on the X and Y axes, respectively.)
The method according to claim 1 or 2,

And the controller calculates diameters (dx (n), dy (n)) of the touch area from the touch measurement signal to determine whether the condition is recognized as a touch.
The method according to claim 1 or 2,

And the transmitting element and the receiving element are alternately arranged on the same line.