TW201543301A - Touch sensor system and method of segmenting touch data - Google Patents

Abstract

In one embodiment, the touch controller receives touch signals transmitted by a touch panel so as to generate the touch data and perform segmentation based on a peak node of the touch data by assigning labels to neighboring nodes. The method includes determining whether nodes of the touch data are in a touch state by using an energy change of the touch data; selecting a peak node of the touch data; determining a state of the touch data by tracking the peak node; and performing segmentation based on the peak node.

Description

Touch data segmentation method of touch controller [Cross-Reference to Related Applications]

The present invention claims the benefit of the Korean Patent Application No. 10-2014-0038753 filed on Apr. 1, 2014, and the Japanese Patent Application No. 10-2014-0118963, filed on Sep. 5, 2014. The entire disclosure of the application is incorporated herein by reference.

The present inventive concept is directed to a method of segmenting touch data and, more particularly, to a method of touching a touch panel of a panel by using a touch controller.

The user interface of personal computers, mobile communication devices, and privately owned information processors or the like is formed by using various input devices such as a keyboard, a mouse, and a digitizer. A touch panel that the user touches directly with a pen or finger to input information has been used to meet the needs of an input device that is easy to carry and use. The method of segmentally touching data by detecting the position of the touch on the touch panel requires long operation time and a large amount of operations to search for the touch node, and thus requires a large amount of memory.

The inventive concept provides a method of segmenting touch data and a touch controller for performing the method to reduce memory consumption, operating time, and/or number of operations.

According to an aspect of the inventive concept, a method for segmenting touch data is provided, the method comprising: selecting a peak node having a peak node value in a touch material of a touch panel and assigning a label to the selected peak node; Performs segmentation based on the touch data of the selected peak node.

Performing the segmentation based on the selected peak node may include: (a) setting the selected peak node as the first node, and searching for the node having the lowest node value from the neighboring nodes of the first node; (b) having the lowest node The node of the value is set as the second node, the node having the highest node value is selected from the unlabeled neighboring nodes of the second node, and the selected node is stored in the memory; and (c) the node having the highest node value is set For the third node, the node having the highest node value is selected from among the unlabeled neighbor nodes of the third node having the node value greater than the node value of the third node, and the selected node is stored in the memory.

(c) setting the node having the highest node value as the third node may include the same tag assignment as the tag of the peak node when the node value of the unlabeled neighboring node of the third node is not greater than the node value of the third node Give the node stored in the memory.

The method can further include performing (a) through (c) when there is an untagged active neighbor of the second node.

The method may further comprise basing the energy in a vertical or horizontal direction The upward change determines the touch state of the node touching the data.

The energy in the vertical or horizontal direction increases and then decreases, in vertical or When the energy in the horizontal direction increases or the energy in the vertical or horizontal direction decreases, the node can be determined to be in a touch state.

The method may further include a previous frame based on the touch data The status information of the peak node tracks the selected peak node; and determines the state of the selected peak node.

Tracking the selected peak node can include: measuring the peak node in the previous frame The distance from the selected peak node in the current frame; the peak node in the previous frame is connected to the selected peak node, wherein the previous frame is closest to the current frame among several previous frames; The status information of the peak node connected to the selected peak node in the previous frame sets the peak node.

Determining the state of the selected peak node may include: by using the first threshold And the second threshold value classifies the state of the selected peak node into a non-touch state, a noise state, a touch state, or a pending state according to the peak node value; and sets the first threshold value to determine whether a touch occurs And a second threshold is set to indicate a reference to fully touch the touch panel, wherein the second threshold is greater than the first threshold.

When in the previous frame and connected to the peak node of the selected peak node In the touch state and the peak node value of the selected peak node is between the first threshold and the second threshold, the pending state can be determined, and in the pending state, the state determination of the peak node can be postponed until the next message. Executed in the box.

According to another aspect of the inventive concept, a touch sensor system is provided System, comprising: a touch panel; and a touch controller for receiving the touch surface The board transmits a touch signal to generate touch data, selects a peak node having a peak in the touch data, and performs segmentation based on the peak node by assigning the label to the peak node.

The touch controller can be configured to determine a touch state of a node of the touch data based on a change in energy in a horizontal or vertical direction.

When the energy in the vertical or horizontal direction increases and then decreases, the touch state of the node can be determined when the energy in the vertical or horizontal direction increases or the energy in the vertical or horizontal direction decreases.

The touch controller can be configured to track the peak node based on state information of the peak node in the previous frame of the touch data and determine the state of the peak node.

The touch controller can be configured to: measure a respective distance between a peak node in the previous frame and the selected peak node, wherein the selected peak node is in the current frame; in the peak node of the previous frame One is connected to a selected peak node in the current frame, wherein the previous frame is closest to the current frame among a number of previous frames; and based on the peak node in the previous frame and connected to the selected peak node The status information gets the peak node.

The touch controller can be configured to: set the peak node as the first node, and search for the node having the lowest node value from the adjacent nodes of the first node; and set the node with the lowest node value as the second node, And selecting, from the unlabeled neighboring nodes of the second node, the node having the highest node value; setting the node having the highest node value as the third node, and the node value from the third node having the node value greater than the third node Selecting a node having the highest node value among the unlabeled neighbor nodes; and assigning the same tag as the tag of the peak node to the selected one when the node value of the unlabeled neighboring node of the third node is not greater than the node value of the third node node.

According to another aspect of the inventive concept, a touch sensor system is provided The system includes: a touch panel; and a touch controller that generates a touch data by receiving a touch signal transmitted by the touch panel, and selects a peak node having a peak value in the touch data to select the peak node Tagging, searching for neighboring nodes based on the selected peak node, and storing the touch data of the selected peak node in the memory based on the result of the search.

The touch controller can be configured to: from the neighboring nodes of the selected peak node when Determining a first node having a minimum node value; determining a second node having the highest node value from among the tagless valid neighboring nodes of the first node; and determining the highest node among the tagless valid neighboring nodes of the second node The third node of the value.

The memory can store the touch data of the second node and the third node.

The touch controller can have a node value of the unlabeled neighbor node of the third node When not greater than the node value of the third node, the same tag as the tag of the selected peak node is assigned to the second node and the third node stored in the memory.

According to another aspect of the inventive concept, a segmented touch data is provided The method includes: selecting a first peak node in the touch data of the touch panel; assigning the first label to the first peak node; searching for at least one unlabeled phase including the label first peak node and the first peak node a first zone of the neighboring node; and tagging at least one unlabeled node in the first zone according to the first tag.

The first zone may include a matrix including a first peak node and a first At least one unlabeled neighbor of the peak node.

Tagging at least one unlabeled neighbor node can be included in the first zone The unlabeled node is selected as the current central node, and the node information of the current central node is stored in the memory, and the highest adjacent node of the current central node is selected, and The first tag is assigned to the selected untagged node based on the node information stored in the memory.

Tagging at least one unlabeled neighbor node may further include When an overflow occurs after storing the node information, the unlabeled node corresponding to the node information stored in the memory is invalidated, and the node information is cleared from the memory.

Selecting the unlabeled node in the first zone may include selecting the peak node Label adjacent nodes and assign the selected unlabeled lowest node to the current central node.

Selecting the unlabeled node in the first zone may include selecting the current central node The unlabeled highest neighbor node, and the selected unlabeled highest node is assigned to the current central node.

The method of segmenting touch data may further include marking the node After signing, the node information stored in the memory is cleared.

The method of segmenting the touch data may further include completing the labeling of the first area Signing, and changing the size of the first zone or moving the first zone to include at least one of the tagged node and the unlabeled node in the touch profile.

The method of segmenting touch data may further include selecting a touch material a second peak node, assigning a second tag to the second peak node, searching for a second zone including at least one of the tagged second peak node and the second peak node unlabeled neighboring node, and based on the second tag To tag at least one unlabeled neighbor.

The method of segmenting touch data may further include first based on touch data The status information of one or more peak nodes in the preamble track the first peak node and determine the state of the first peak node.

Tracking the first peak node may include measuring one or more of the previous frames The distance between the peak node and the first peak node in the current frame, selecting one of the one or more peak nodes in the previous frame based on the measured distance, and based on the selected peak node in the previous frame The state sets the state of the first peak node.

Determining the state of the first peak node may include determining based on the selected peak node The state compares the node value of the peak node with the first threshold and the second threshold, and classifies the state of the first peak node into a non-touch state, a noise state, and a touch state based on the node value of the first peak node. Or a pending state, wherein the first threshold indicates whether a touch occurs and the second threshold indicates whether the touch panel is fully touched.

The pending status indicates that the selected peak node in the previous frame is in a touch state And the state of the first peak node is greater than the first threshold and equal to or less than the second threshold, and in the pending state, the determination of the state of the first peak node is postponed until the next frame is executed.

The method of segmenting the touch data may further include based on the energy in the vertical direction The change in the horizontal direction determines the touch state of the touch panel.

The energy in the vertical or horizontal direction increases and then decreases, in vertical or When the energy in the horizontal direction increases or the energy in the vertical or horizontal direction decreases, the touch panel is determined to be in a touch state.

According to another aspect of the inventive concept, a touch sensor system is provided a touch panel; and a touch controller configured to receive a touch signal from the touch panel, generate touch data, tag a peak node having a peak in the touch data, and Searching for at least one unlabeled neighbor node having a tag peak node as a current center node in a first zone including at least one of a first peak node and an unlabeled neighbor node to perform segmentation touch based on the tagged peak node Data, storing node information of the current central node in the memory, and based on the node resource The message tags at least one unlabeled neighbor.

The first zone includes a matrix, the matrix being included in the first of the centers of the matrix At least one unlabeled neighbor node of the peak node and the first peak node.

The touch controller is configured to place the unlabeled adjacent section of the first peak node One of the points is selected as the current central node, the node information of the current central node is stored in the memory, the labeled node having the highest neighboring node of the current central node is selected, and the corresponding label is stored according to the first label. The nodes of the node information in the memory are tagged.

The selected unlabeled node in the unlabeled node is the same as the first peak node The node with the lowest node value of the neighbor.

The selected unlabeled node in the unlabeled node is the current central node The node with the highest node value of the neighbor.

According to another aspect of the inventive concept, a segmented touch data is provided The method includes: selecting a first peak node as a first central node in a touch material of a touch panel; assigning a first label to a first peak node; defining a first peak node and a first peak node Labeling a first zone of a neighboring node; tagging the first zone according to the first tag; and expanding the first zone to include one or more unlabeled nodes in the touch material.

The first zone may comprise a matrix comprising the first in the center of the matrix A peak node and an unlabeled neighbor of the first peak node.

Tagging the region may include selecting an unlabeled node in the first region Selecting the current central node, storing the node information of the current central node in the memory, selecting the tagged node with the highest node value adjacent to the current central node, and selecting the first tag based on the node information stored in the memory Assigned to an unlabeled section point.

Tagging unlabeled neighbors can further include selections and currents The unlabeled node with the highest node value adjacent to the heart node stores the node information of the selected unlabeled node having the highest node value, and updates the current central node with the selected unlabeled node having the highest node value.

The method of segmenting the touch data may further include assigning the first label Empty the node information stored in the memory after the unlabeled node.

100‧‧‧Touch controller

110‧‧‧Touch data generator

120‧‧‧Microprocessor

130‧‧‧ memory

200‧‧‧Touch panel

210‧‧‧ fingers

220, 230, 400‧‧‧ Touch zone

300‧‧‧Host

810‧‧‧Non-touch state

820‧‧‧ Noise Status

830‧‧‧ Touch status

840‧‧‧ pending status

1100‧‧‧Touch display device

1110‧‧‧Window glass

1120‧‧‧ polarizer

1130‧‧‧ display panel

1140‧‧‧Display drive

1200‧‧‧Touch sensor system

1210‧‧‧Mobile Phone

1220‧‧‧TV

1230‧‧‧Automatic Teller Machine

1240‧‧‧Elevator

1250‧‧‧ ticketing device

1260‧‧‧ portable multimedia player

1270‧‧ e-book reader

1280‧‧‧ navigation device

A, B, C‧‧‧ peak nodes

a, b‧‧‧ distance

I‧‧‧peak node

I1‧‧‧ first peak node

I2‧‧‧ second peak node

M, M1, M2‧‧ matrix

RX1~RX14‧‧‧Sensor electrode

S310, S320, S330, S340, S350, S1010, S1020, S1022, S1024, S1030, S1032, S1040, S1042, S1052, S1060, S1070, S1080, S1090, S2000‧‧

TD‧‧‧Touch data

THRESHOLD1‧‧‧First threshold

THRESHOLD2‧‧‧second threshold

TS‧‧‧Touch signal

TY1~TY14‧‧‧ drive electrode

Example embodiments of the inventive concepts will be more clearly understood from the following detailed description of the invention.

Figure 1 is a block diagram of the structure of the touch controller.

2A to 2C are views of the touch panel of Fig. 1.

3 is a flow diagram of a method of segmenting touch data in accordance with one or more embodiments of the inventive concepts.

4 through 5C are diagrams of a method of determining a touch state in accordance with one or more embodiments of the inventive concept.

6A and 6B are diagrams of a method of determining a peak node of a touch data according to one or more embodiments of the inventive concept.

7 is a diagram of a method of tracking peak nodes of touch data in accordance with one or more embodiments of the inventive concepts.

8 and 9 are diagrams of a method of determining a state of a peak node of a touch data according to one or more embodiments of the inventive concept.

10A-10G are segments in accordance with one or more embodiments of the inventive concept A diagram of the method of touching the data.

11 is a view of a touch display device having a touch controller in accordance with one or more embodiments of the inventive concept.

Figure 12 illustrates various products in which a touch sensor system including a touch controller is installed in accordance with one or more embodiments of the inventive concept.

The drawings, which are used to illustrate the preferred embodiments of the invention, are intended to provide a

The invention will now be described more fully hereinafter with reference to the accompanying drawings in which FIG. However, the invention may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein; rather, the embodiments are provided so that the invention will be thorough and complete, and such embodiments The concept of the present invention will be fully conveyed to those skilled in the art. However, the invention is not intended to be limited to the specific mode of practice, and it is understood that all changes, equivalents, and alternatives may be made without departing from the spirit and scope of the invention. The same reference numbers in the drawings denote the same elements. For the convenience of explanation, the size of the components in the drawings can be enlarged.

The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to limit the invention. The expression used in the singular encompasses the plural <RTI ID=0.0> </ RTI> </ RTI> unless it has a distinctly different meaning in the context. In the present specification, the terms "comprising", "comprising", "comprising", "the" It is not intended to exclude the possibility that one or more other features, numbers, steps, acts, components, components, or combinations thereof may be added.

Unless otherwise defined, all terms used herein (including technology And scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention pertains. It is further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the related art, and should not be interpreted in an idealized or overly formal sense, unless explicitly stated herein. definition.

Recently, electronic devices have become very small and slim so that touch is widely used. Instead of a button-type interface, such as a keyboard. According to the operating principle, the touch screen can be a resistive-type touch screen, a surface acoustic wave type touch screen, or an infrared beam type touch screen (infrared- Beam type touch screen), electrostatic capacitive type touch screen, and the like.

Capacitive touch screen detection includes circuitry in the touch sensor The change in capacitance is then calculated by reading the detected change in the capacitance in the circuit and directly outputting the touch coordinates or outputting information about the touch coordinates. The capacitive touch screen recognizes the presence of a touch by detecting a change in capacitance between the two electrodes. In order to recognize the occurrence of a touch, a two-dimensional (2D) touch data (hereinafter, referred to as "segmentation") is segmented.

1 is a block diagram showing the structure of a touch controller 100 for performing a method of segmenting touch data in accordance with one or more embodiments.

Referring to FIG. 1, the touch controller 100 is connected between the touch panel 200 and the host 300. The touch controller 100 recognizes the occurrence of a touch on the touch panel 200, The coordinates of the touch location of the office, and the calculated coordinates are transmitted to the host 300. When a touch occurs, the touch panel 200 transmits a change in the physical properties of the touched position to the touch controller 100. In a state where the touch panel 200 is a capacitive touch panel, the touch panel 200 transmits the touch signal TS to the touch controller 100, and the touch signal TS indicates the mutual capacitance between the touched positions ( Mutual capacitance).

The touch controller 100 includes a touch data generator 110, a microprocessor 120, and a memory 130. The touch data generator 110 receives the touch signal TS transmitted by the touch panel 200 and generates the touch data TD. The touch signal TS may be an analog signal that is output as a measured value of the mutual capacitance that is changed due to the touch of the touch panel 200. The touch data generator 110 can execute a program for amplifying and converting the touch signal TS, and generates a touch data TD which is a digital signal. (Touch signal TS-> touch signal TS)

The microprocessor 120 receives the touch data TD generated by the touch data generator 110, and determines whether a valid touch or a multi-touch occurs by checking the touch data TD. The microprocessor 120 calculates the effective touch coordinates and transmits the calculated effective touch coordinates to the host 300. When multiple touches occur, the microprocessor 120 can calculate the multi-touch coordinates. The microprocessor 120 can tag the touch material TD and segment the tagged touch data TD into a tag group by using a multi-touch algorithm. The tag group is an identifier for determining which of the groups segmented into the multi-touch group is the touch data TD.

The microprocessor 120 can perform a method of segmenting the touch data TD. The method includes performing segmentation based on peak nodes of touch data TD and tagging adjacent nodes. The method includes determining whether a node is in a touch state by using touch data TD. When the node is in a touch state, the search touches each node of the data TD, and Select the peak node with a peak. When determining the peak node, the state information of the peak node is tracked based on the state information of the peak node in the previous frame. After tracking the status information of the peak node, the state of the peak node is determined. Next, the segmentation of the touch data TD is performed.

The memory 130 can store the multi-touch calculation performed by the microprocessor 120. The program or the program that performs the method of segmenting the data TD. The memory 130 can store data (or information about a central node) generated when a method of performing a multi-touch algorithm or a segment touch data TD is performed. Information about the central node stored in memory 130 can be used by microprocessor 120 to calculate touch coordinates.

The host 300 can be a touch including the touch panel 200 and the touch controller 100. The application processor of the touch sensor system. The touch sensor system can be included in a personal computer, a mobile communication system, a personal information processing system, and the like.

2A to 2C are views of the touch panel 200 of Fig. 1.

Referring to FIG. 2A, the finger 210 touches the touch panel 200. Finger 210 Acts as a coordinate indicator. According to an example embodiment, a stylus pen may be used instead of the finger 210. In an example embodiment of the inventive concept, the finger 210 touches the eleventh node in the X direction and the eleventh node in the Y direction.

Referring to FIG. 2B, the touch panel 200 can be a mutual capacitance sensing method. Touch the panel. The touch panel 200 includes drive electrodes TY1 to TY14 and sensing electrodes RX1 to RX14. In an exemplary embodiment of the inventive concept, a case where fourteen driving electrodes TY1 to TY14 and fourteen sensing electrodes RX1 to RX14 are included in the touch panel 200 will be explained. According to an embodiment, the number of drive electrodes and sense electrodes included in the touch panel 200 may vary. In addition, the shapes of the drive electrodes and the sense electrodes may vary depending on the embodiment.

In the touch panel 200, the driving electrodes TY1 to TY14 are disposed in the water The square is upward, and the sensing electrodes RX1 to RX14 are arranged in the vertical direction. The drive electrodes TY1 to TY14 and the sensing electrodes RX1 to RX14 are alternately arranged. Mutual capacitance is generated between the alternately disposed drive electrodes TY1 to TY14 and the sense electrodes RX1 to RX14. A position at which mutual capacitance is generated between the drive electrodes TY1 to TY14 and the sensing electrodes RX1 to RX14 may be defined as a node.

The nodes on the touch panel 200 can be configured in a matrix form, as shown in FIG. 2C. Explained in the middle. Each node can be identified by a combination of the number of columns and the number of rows. For example, nodes configured at columns 4 and 3 can be indicated as touching nodes (4, 3) on panel 200. Each node may have one or more neighboring nodes. For example, eight adjacent nodes can be configured around a node.

In the touch panel 200, the drive electrodes TY1 to TY14 are alternately arranged And the capacitance of the node at the sensing electrodes RX1 to RX14 can be measured by applying a constant voltage pulse to the driving electrodes TY1 to TY14 and collecting the charges corresponding to the voltage pulses from the sensing electrodes RX1 to RX14. When a conductive object such as a user's finger or stylus approaches the node of the touch panel 200, an electric field is generated, and thus the capacitance can be reduced. As illustrated in FIG. 2C, the touch data TD of each node can be obtained by measuring the decrease in capacitance. For example, the touch data TD of the node (2, 2) is 21, and the touch data TD of the node (11, 11) is 200. Touch panel 200 can have a plurality of touch zones 220, 230, and 400.

The inventive concept describes a method of segmenting touch data TD, the method package Included: identifying the touched area before performing the segmentation of the touch data TD; extracting information about the touched area; and performing segmentation of the touch data TD. The inventive concept can be implemented by a program that uses the touch controller 100 or record of FIG. The firmware (F/W) of the program described above performs a method of segmenting the touch data TD.

3 is a fragmentation touch according to one or more embodiments of the inventive concept. Flow chart of the method of TD.

First, it is determined in step S310 whether the node touching the data TD is in contact. Touch status. The touch data generator TD of FIG. 1 that receives the touch signal TS of each node on the touch panel 200 of FIG. 1 generates the touch data TD. When a touch occurs in the touch panel 200, the change in mutual capacitance becomes large. Therefore, the touch signal TS and the touch data TD can have a large node value. When no touch occurs in the touch panel 200, the mutual capacitance does not change, and therefore, the touch signal TS and the touch data TD may have substantially small node values. Although no touch occurs in the touch panel 200, the mutual capacitance may be changed due to noise. In this case, the change in mutual capacitance is extremely small, and therefore, the touch signal TS and the touch data TD may have small node values. When the node value of the touch data TD is less than the first threshold, the touch data TD may be determined to be noise.

The energy in the horizontal direction can be calculated in the frame of the touch data TD and Energy in the vertical direction. The energy in the horizontal direction means the sum of the touch data TD corresponding to the nodes arranged in the horizontal direction, and the energy in the vertical direction means the sum of the touch data TD corresponding to the nodes arranged in the vertical direction. . The touch state of the node can be determined by detecting the change in the horizontal and vertical directions of the energy of the touch data TD. That is, whether or not a touch event occurs may be determined based on changes in energy in the horizontal and vertical directions, which will be described in detail with reference to FIGS. 4 to 5C.

Selecting each node by searching for the touch data TD in step S320 There is a node that touches the data TD with a peak. The touch data TD of each node can be the node value of the node. Selected when the node value of the selected node is greater than the node value of the adjacent node The node can be set as a peak node. The location of the peak node and the node value can be stored in the memory 130 of FIG. Although the node value of the selected node is greater than the node value of the adjacent node, if the node value of the adjacent node is less than the effective node value (for example, the first threshold), the node value of the selected node is determined to be a noise. A method of searching for a peak node will be described in detail with reference to FIGS. 6A and 6B.

The first related to the peak node of the current frame may be tracked in step S330. The peak node of the front frame. The distance between the position of the peak node in the previous frame and the position of the peak node in the current frame can be measured to track the peak node of the previous frame associated with the peak node of the current frame. That is, one of the peak nodes in the current frame is connected to the nearest one of the peak nodes in the previous frame. Based on the distance between the previous frame and the peak node of the current frame, the peak node of the previous frame associated with the peak node of the current frame can be tracked. A method of tracking the corresponding peak node of the previous frame will be described in detail in FIG.

The state of the peak node is determined in step S340. Can be based on previous frames The state of the peak node and the node value of the peak node of the current frame determine the state of the peak node included in the touch data TD. The state of the peak node may be one of a non-touch (NO_TOUCH) state, a noise (NOISE) state, a touch (TOUCH) state, or a pending (PENDING) state. A method of determining the state of the peak node of the current frame will be described in detail in FIG. The position, node value and status of the node of the current frame can be provided as parameters for the segment touch data TD.

The segmentation of the touch material TD is performed in step S350. Segmented touch data The TD method includes tagging the peak node based on the state of the peak node and searching for the node having the lowest node value among the valid neighbor nodes of the first central node of the peak node. The node with the lowest node value is set as the second central node. Second The node information of the heart node can be stored in the memory 130 of FIG. The node information of the node may include the location coordinates of the node and the node value.

Has the highest among the unlabeled valid neighbors of the second central node The node of the node value is selected as the third central node. The node information of the third central node can be stored in the memory 130 of FIG. A node having the highest node value among the unlabeled neighbor nodes of the third center node and having a node value higher than the node value of the third center node is selected as the next center node. The node information of the next central node can be stored in the memory 130 of FIG.

Can be repeated over the untagged neighbor nodes of the node that belong to the previous central node and The program that selects the node as the next central node when there is the highest node value among the unlabeled neighbor nodes until there is no more tagged node having a node value higher than the node value of the previous center node. As a result, the stacked center node in memory 130 can have the same tag as the tag assigned to the peak node.

According to an example embodiment of the inventive concept, a memory of a small size can be used The segment effectively touches the data to store the node information of the selected node in the memory by repeatedly searching for the neighbor nodes of the peak node, and tagging the adjacent nodes based on the stored node information to segment the touch data.

In an example embodiment of the inventive concept, because based on touch data The peak nodes of the TD tag the adjacent nodes after performing the segmentation, so the number of node information stored in the memory 130 can be reduced. Therefore, the memory consumption required for the segment touch data TD can be reduced.

4 to 5C are judgments according to one or more embodiments of the inventive concept A diagram of the method of setting the touch state.

4 illustrates the touch area 400 included in the touch panel 200 of FIG. 2C. Each node touches the data TD. The sum of the touch data TD in the horizontal direction is 540 in the first column, 743 in the second column, 737 in the third column, 479 in the fourth column, and 479 in the fourth column, and in the fifth column 304. The sum of the touch data TD in the horizontal direction is equal to the energy in the horizontal direction. In other words, for the first to fifth columns, the energies in the horizontal direction are 540, 743, 737, 479, and 304, respectively. The energy is increased from 540 to 743, but then decreased to 737, 479 and then 304. The sum of the touch data TD in the vertical direction is 541 in the first row, 748 in the second row, 786 in the third row, 628 in the fourth row, and 0 in the fifth row. . The sum of the touch data TD in the vertical direction is equal to the energy in the vertical direction. In other words, for the first to fifth rows, the energies in the vertical direction are 541, 748, 786, 628, and 0, respectively. The energy in the vertical direction increases from 541 to 748, and then to 786, but then decreases to 628 and then to zero.

Referring to Figure 4, the change in energy in the horizontal and vertical directions is increased and then reduce. Therefore, the touch data TD of FIG. 4 is determined to be in a touch state. That is, when the change in energy in the touch data TD is increased and then decreased (as illustrated in FIG. 5A), the touch data TD is determined to be in a touch state. According to an embodiment, the change in energy in the touch material TD is increased, and the touch data TD may be determined to be in a touch state, as illustrated in FIG. 5B. According to an embodiment, the change in energy in the touch data TD is reduced, and the touch data TD may be determined to be in a touch state, as illustrated in FIG. 5C.

6A and 6B are diagrams of a method of determining an effective peak node of a touch data TD, in accordance with one or more embodiments of the inventive concept.

FIG. 6A illustrates the touch data TD of each node of the first portion of the touch panel 200 of FIG. A node having a touch data TD with a peak of 100 is selected. The node value of the adjacent node around the node having the node value of 100 is equal to or greater than the first threshold, for example, 15. Since the adjacent node has a node value of at least 15, the adjacent node is determined to be a valid node. Therefore, a node having a peak value of 100 is determined to be a peak node.

FIG. 6B illustrates the touch data TD of each node of the second portion on the touch panel 200 of FIG. Select a node with a touch data TD with a peak of 100. The node value of an adjacent node around a node having a node value of 100 is less than a first threshold, such as 15. Since all neighboring nodes have node values less than 15, all neighboring nodes are determined to be invalid nodes. Therefore, a node having a peak value of 100 is determined to be a peak node. For example, in the touch data TD of FIG. 2C, the first touch region 220 has a peak node having a peak value of 100 (that is, a node (3, 13) having a touch data TD of 100) and the first The peak node of the two touch region 230 having a peak value of 110 (i.e., the node (12, 4) having the touch data TD of 110) has an invalid neighbor node, and therefore, the invalid neighbor node is judged to be miscellaneous. Signal component.

7 is a diagram of a method of tracking peak nodes of a touch data TD in accordance with one or more embodiments of the inventive concepts.

FIG. 7 illustrates the touch data TD of the previous frame in the third portion of the touch panel 200 of FIG. 1 and the touch data TD of the current frame. The peak nodes of the previous frame are A and B, and the peak node of the current frame is C. The distance a between the peak node A of the previous frame and the peak node C of the current frame and the distance b between the peak node B of the previous frame and the peak node C of the current frame are measured. Since the distance b has a smaller value than the distance a, the peak node B of the previous frame and the peak node C of the current frame are connected. The peak node C of the current frame enters a state based on the status information of the peak node B of the previous frame. The status information of the peak node B of the previous frame contains Information about the noise status, touch status, or pending status. When the peak node C is included in the multi-touch data, the status information may include tagging information.

8 and 9 show the state of the state of the peak node of the touch data TD. The map of the law.

Referring to FIG. 8 and FIG. 9, the peak node is determined by using the peak node value. status. The state of the peak node may be classified into a non-touch state 810, a touch state 830, or a pending state 840 based on the state of the peak node and the peak node value in the previous frame. The state of the peak node can be determined by using the first threshold THRESHOLD1 and the second threshold THRESHODL2, as illustrated in FIG. The first threshold THRESHOLD1 is used as a reference for determining whether a touch equal to or greater than the noise occurs. The second threshold value THRESHOLD2 is greater than the first threshold value THRESHOLD1 and is used as a reference to indicate that the touch panel 200 is effectively touched.

The non-touch state 810 is where the peak node value is less than or equal to the first threshold The status of the value. When the peak node that has been in the non-touch state 810 in the previous frame has a node value that is less than or equal to the first threshold of the current frame, the peak node in the current frame is determined to be in a non-touch state. 810. When the peak node that has been in the non-touch state 810 in the previous frame has a node value in the current frame that is greater than the first threshold but less than or equal to the second threshold, the peak node in the current frame is It is determined to be in the noise state 820. When the peak node that has been in the non-touch state 810 in the previous frame has a node value in the current frame that is greater than the second threshold, the peak node in the current frame is determined to be in the touch state 830.

The noise state 820 is where the peak node value is greater than the first threshold but less than Or equal to the state of the second threshold. When the peak node that is already in the non-touch state 810 in the previous frame has a current greater than the first threshold but less than or equal to the second threshold When the node value is in the frame, the peak node in the current frame is determined to be in the noise state 820. When the peak node that has been in the noise state 820 in the previous frame has a node value in the current frame equal to or lower than the first threshold, the peak node in the current frame is determined to be in a non-touch state. 810. When the peak node that has been in the noise state 820 in the previous frame has a node value in the current frame greater than the first threshold, the peak node in the current frame is determined to be in the touch state 830.

The touch state 830 is a state in which the peak node value is greater than the first threshold. when When the peak node that has been in the touch state 830 in the previous frame has a node value in the current frame that is less than or equal to the first threshold, the peak node in the current frame is determined to be in the pending state 840.

Pending state 840 is the state of the peak node is deferred until the next frame A state in which the peak node value is greater than the first threshold but equal to or less than the second threshold. When the peak node that has been in the pending state 840 in the previous frame has a node value greater than the second threshold, the peak node in the current frame is determined to be in the touch state 830. When the peak node that has been in the pending state 840 in the previous frame has a node value that is less than or equal to the first threshold, the peak node in the current frame is determined to be in the non-touch state 810.

10A-10G are one or more embodiments in accordance with the inventive concepts A diagram of the method of touching the data TD.

In an example embodiment of the inventive concept, the highest node means having the highest The node of the node value, and the lowest node means the node with the lowest node value. A higher node means a node with a higher node value, and a lower node means a node with a lower node value. A peak node means a node with a peak node value. In addition, a node can be a valid node unless the node is defined as an invalid node. Adjacent nodes can have A node that is one or more nodes away from the node and may be a node within a predefined distance from the current central node.

The frame touch data will be explained by referring to FIG. 10C and FIG. 10E. The memory 130 of FIG. 10D depicts a flow chart of the method of segmenting the touch data TD of FIGS. 10A and 10B. FIG. 10C illustrates the same frame touch data as the frame touch data in FIG. 2C. Figure 10E illustrates touch data with more than one valid peak node. The arrows in Figures 10C and 10E illustrate the paths used to select neighboring nodes of the current central node.

Referring to FIG. 10A to FIG. 10E, in step S1010, the frame can be touched. The unlabeled peak node of the data TD is selected as the first central node, and the first central node can be tagged. For example, the peak node is peak node I having a peak node value of 200 in FIG. 10C, or one of peak node I1 and peak node I2 having peak node values of 107 and 105, respectively, in FIG. 10E. Assign the tag to peak node I. The first central node may be the center of a matrix for searching for neighboring nodes. For example, a node having a node value of 200 can be defined as a first central node, and a 3 by 3 (3 x 3) matrix M including the first central node as the center of the matrix can be defined, as illustrated in FIG. 10C . A plurality of matrices M1 and M2 having peak node values of 107 and 105, respectively, may be defined, as illustrated in Figure 10E.

In step S1020, the first central node in the matrix may be unlabeled The neighboring node is selected as the current central node, and the node information of the current central node can be stored in the memory 130. The current central node may be a continuously selected untagged node in a clockwise or counterclockwise direction, such as, but not limited to, an unlabeled node having the lowest node value in the matrix, in the clockwise or counterclockwise direction from the upper left node of the matrix, and selected in a predetermined order. The node of the tag node. For example, based on the peak node I search packet in FIG. 10C Neighbor nodes contained in a 3 × 3 matrix. The eight adjacent nodes around the peak node I have node values of 176, 184, 180, 189, 186, 191, 185, and 180, respectively. The neighboring node is a valid node having a node value equal to or greater than the first threshold (eg, 15). A neighboring node having a node value of 176, which is the lowest node value, may be selected as the current center node, but is not limited thereto. The node information of the central node can be stored in the memory 130 of FIG. 10D. The node information of the node may include the location coordinates of the node and the node value.

Whenever the node information is stored in the memory 130, the step can be It is determined in S1022 whether or not a memory overflow occurs. If the memory overflow occurs in the memory 130 when the steps S1020 and S1040 are performed, the node corresponding to the node information stored in the memory 130 may be invalidated in the step S1024, and may be stored in the memory 130. Node information. If there is no memory overflow, step S1030 may be performed. For example, if the search path is further away from the first central node due to the noise in the touch data when searching for the current central node, memory overflow may occur due to storing a large number of current nodes on the search path. In this case, the node corresponding to the node information stored in the memory 130 can be invalidated by determining that the abnormally long search path is invalid.

Determining in step S1030 whether there is a current central node having a ratio An unlabeled neighbor of a node value with a high node value of the front central node. If there is an unlabeled neighbor node of the current central node that is higher than the current central node, the unlabeled higher node may be selected and stored in the memory 130.

The selected node may be updated to the current central node in step S1040. If All of the higher neighboring nodes of the current central node are tagged, and step S1060 is performed. For example, when the current central node is a node with a node value of 176, In FIG. 10C, eight neighboring nodes of the current center node may have node values of 160, 165, 0, 184, 200, 180, 175, and 169. Neighboring nodes having a node value of 200 are tagged, and adjacent nodes having node values of 160, 165, 0, 184, 180, 175, and 169 are not tagged. An unlabeled neighbor having a node value of 184, which is the highest node value among the unlabeled neighbors, may be selected as the current center node. Node information about the current central node having an unlabeled neighbor node having a node value of 184 may be stored in the memory 130 of FIG. 10D. Steps S1030 and S1040 may be performed until there is no longer a higher neighboring node of the current central node. As a result, the node information corresponding to the node value in the order of 176-184-189-191 can be stored in the memory 130, and step S1060 can be performed.

The same label with the highest node adjacent to the label may be used in step S1060. The unlabeled node corresponding to the node information stored in the memory 130 is tagged because there is no longer an unlabeled node higher than the current central node. As a result, the portion of the touch data TD is tagged. For example, in the case of the current central node having a node value of 191 in FIG. 10C, there is no longer an unlabeled node higher than the current central node, and the highest node with the highest value (peak node) having a node value of 200 is available. I) The same tag tags the nodes having node values 191, 189, 184, and 176, and can clear the stored node information in the memory 130 corresponding to nodes having node values of 191, 189, 184, and 176. .

It is determined in step S1070 whether there is an unlabeled phase of the first central node Neighbor node. If there is an unlabeled neighboring node of the first central node, the method of segmentation may perform step S1020 to select the unlabeled node among the unlabeled neighboring nodes of the first central node as the current central node. If there is no unlabeled neighboring node of the first central node, the adjacent nodes of the first central node may be tagged. For example In other words, since there are unlabeled nodes having node values of 180, 185, 180, and 186 among adjacent nodes of the first central node in FIG. 10C, steps S1020 through S1040 may be performed (as described above). To tag the unlabeled neighbor nodes of the first central node. As a result, all adjacent nodes of the first central node can be tagged.

It is determined in step S1080 whether there is no label in the touch data TD Peak node. For example, when the second peak node I2 has no label after tagging the adjacent node of the first peak node I1 in FIG. 10E, the method of segmentation may perform step S1010 to step S1070 to the second unlabeled peak. Node I2 is tagged. When a segment has a touch data TD of a plurality of peak nodes I1 and I2 (which have node values 107 and 105, respectively, in FIG. 10E), each of the plurality of peak nodes I1 and I2 may be assigned a different label. Thus, tag A can be assigned to a peak node having a node value of 107, and tag B can be assigned to a peak node having a node value of 105.

If there is no more unlabeled peak node in the touch data TD, then it can be in step The size or position of the matrix is changed in step S1090. For example, in step S1090, the sizes of the matrices M, M1, and M2 may be increased, or the center positions of the matrices M, M1, and M2 may be moved to include the labels in the regions covered by the moving matrices M, M1, and M2. At least one of the nodes and at least both of the unlabeled nodes. The center of the 3x3 matrix M can be moved to a node having a node value of 176 or 186 to tag the unlabeled node in Figure 10C. Alternatively, the size of the 3x3 matrix M may be increased to a 5x5 matrix having the same center node as the central node of the 3x3 matrix M.

After changing the matrix, it is determined in step S2000 that the touch data TD is No contains unlabeled nodes. If there is an unlabeled node in the touch data TD, the method of segmentally touching the data TD may perform step S1020. If the matrix is changed as a basis When the result of the touch data TD is touched, the unlabeled node no longer exists in the touch data TD, and the segment touch data can be completed. For example, if the current central node of the 3×3 matrix M moves to the node with the node value of 176 in FIG. 10C, step S1020 to step S1080 may be performed as described above to the unlabeled node in the matrix, That is, 160, 165, 169 and 175 are tagged. Other unlabeled nodes can be tagged in the touch data TD in Figure 10C and can be tagged in the same manner. As a result of the tagging, if there is no more unlabeled node in the touch data TD, the segment touch data can be completed.

As described above in accordance with example embodiments, the method of segmenting touch data may be Performing a segmentation of a larger size touch data with a small memory capacity, and by progressively tagging adjacent nodes of one of the peak nodes in the touch data and gradually expanding from one of the peak nodes Label area to avoid memory overflow.

In addition, the method of segmenting touch data according to an example embodiment may be searched by The peak finding node determines the amount of operation time or operation based on the peak node determining the noise region in the touch data and skipping the segmentation noise region based on the result of the decision.

10F and 10G are segments in accordance with an example embodiment of the inventive concept A flow chart of the method of touching the data. In FIG. 10F, for a more convenient explanation, a description about substantially the same steps as FIG. 10A will be skipped.

Referring to FIG. 10E to FIG. 10G, in step S1032, the method of segmentation may be The highest neighboring node of the current center node is selected to tag the nodes stored in the memory 130 regardless of whether the selected highest node is tagged. For example, when the upper left node having the node value 76 of the matrix M1 including the first peak node I1 in FIG. 10E is the current central node, the tagged highest node (the first peak node I1) may be selected in step S1032. Select as the most current central node with a node value of 76 High neighbors.

It is determined in step S1042 whether the selected node is tagged. If selected section If the point has a label, then in step S1060, the neighboring node corresponding to the node information stored in the memory 130 can be assigned the same label as the node label of the selected tagged node. If the selected node has no label, the selected node may be updated to the current central node in step S1052, and the node information of the selected node may be stored in the memory 130. For example, when the node having the node value of 40 in FIG. 10E is the current central node, if the node having the node value of 101 has no label, the neighbor node having the node value of 101 can be updated to the current central node. And it can be stored in the memory 130. When the node having the node value of 38 in FIG. 10E is the current central node, the neighboring highest node is selected as the tagged node having the node value of 102 through steps S1010 to S1080. As a result, the current central node having a node value of 38 may have the same tag as the tag having the selected tagged node having a node value of 102.

As described above in accordance with example embodiments, the method of segmenting touch data may be The first zone is defined based on touch data of a touch panel including one or more of the tag peak node and the peak node, and one or more unlabeled nodes are tagged according to the tag of the peak node. When the first zone is fully tagged, the size of the first zone or the location of the first zone can be changed to include another unlabeled node adjacent to the first zone.

The first zone may be a zone defined by a matrix and may be in the segmentation phase of the touch data The size or position is changed to include one or more unlabeled nodes and at least one tagged node in the first zone. The first zone can be defined to include a plurality of nodes having the same tag in the touch material. The first zone can be expanded to include one or more unlabeled nodes adjacent to the tagged nodes in the touch material. In the extended area, according to the map The segmentation method illustrated in 10A through 10G tags one or more unlabeled nodes.

As described above, the method of segmenting touch data according to an example embodiment may be The tagless neighbor nodes with tag peak nodes are tagged, and the tag regions are gradually extended by the own tag peak nodes.

11 is a touch with one or more embodiments in accordance with the teachings of the present invention. The controller 100 touches the view of the display device 1100.

The touch display device 1100 can include a window glass 1110 and a touch panel 200 And display panel 1130. The polarizer 1120 can be disposed between the touch panel 200 and the display panel 1130 such that the touch display device 1100 can have optical properties. The window glass 1110 is formed of an acrylic, tempered glass or the like, thereby preventing the touch display device 1100 from being scratched due to an external impact or repeated touch.

The touch panel 200 can be used by using, for example, indium tin Oxide; ITO) The transparent electrode of the electrode and the patterned electrode are formed on a glass substrate or a polyethylene terephthalate (PET) film. The touch panel 200 may be formed of a capacitive touch panel, and the touch signal TS may be transmitted to the touch controller 100, the touch signal TS indicating a change in mutual capacitance of the touched position.

The touch controller 100 receives the touch signal TS from the touch panel 200, and Generate touch data TD. Additionally, the touch controller 100 can assign tags to neighboring nodes by performing segmentation based on peak nodes of the touch data TD. The touch controller 100 can determine whether the node is in a touch state by using the energy change in the touch data TD. In determining whether the node is in a touch state, the touch controller 100 can select a peak node having a peak node value by searching for each node of the touch data TD. The touch controller 100 tracks the status information based on the peak node in the previous frame. The peak node is selected, the state of the selected peak node is determined, and then the segmentation of the touch data TD is performed.

The touch controller 100 can perform touch data based on the selected peak node Segmentation of TD. The touch controller 100 sets the selected peak node as the first central node, and searches for the node having the lowest node value from among the adjacent nodes of the first central node. Next, the touch controller 100 sets the node having the lowest node value as the second center node, and can select the node having the highest node value from among the unlabeled neighbor nodes of the second center node. The touch controller 100 sets the node having the highest node value as the third central node, and can select the highest node among the unlabeled neighbor nodes of the third central node having the node value greater than the node value of the third central node. The node of the value. In the absence of an unlabeled neighbor having a node value greater than the node value of the third central node, the selected node may be assigned the same tag as the peak node.

The touch controller 100 can be used as a chip-on-board (COB) The type is mounted in a flexible printed circuit board (FPCB), wherein the FPCB is connected to the motherboard from the touch panel 200. According to an embodiment, the touch controller 100 can be installed in a motherboard of a graphics system.

The display panel 1130 may be formed of two glass sheets attached to each other, One of the sheets forms a top surface and the other sheet forms a bottom surface. The display driving device 1140 can be mounted in the display panel 1130 as a chip-on-glass (COG) type. According to an embodiment, the touch controller 100 and the display driving device 1140 can be integrated in one semiconductor wafer.

Figure 12 illustrates an installation package in accordance with one or more embodiments of the inventive concept A variety of products of touch sensor system 1200 including touch controller 100.

Referring to FIG. 12, the touch screen type product may include a touch sensor system. 1200, the touch sensor system includes a touch controller 100. In the mobile phone industry led by smart phones, touch-screen products have attracted much attention. The touch sensor system 1200 can include a touch panel 200 and a touch controller 100. The touch controller 100 generates the touch data TD by receiving the touch signal TS transmitted by the touch panel 200, and assigns the label to the peak node having the peak node value in the touch data TD to perform the peak node based Touch the segment of the data TD.

The touch sensor system 1200 can be used as a user interface as necessary Touching the display device in the field. The touch sensor system 1200 is applied to the mobile phone 1210 and can be used differently for the television 1220 with a touch screen, the automated teller machine 1230 instead of the bank teller deposit, the elevator 1240, the ticket for the subway station, etc. The device 1250, the portable multimedia player 1260, the e-book reader 1270, the navigation device 1280, or the like.

Touch sensing system 1200 can use segmented touch data to accurately identify A method of recognizing a user's touch input applied to the display device. The method can include determining whether the node is in a touch state based on an energy change of the touch data TD, and selecting a peak node having a peak node value by searching for a node of the touch data TD. The state information about the peak node is tracked based on the segment information about the state information of the peak node in the previous frame, and the segmentation of the touch data TD can be performed after determining the state of the peak node.

In the description of the present invention, certain detailed explanations of the related art are omitted when it is considered that it may unnecessarily obscure the essence of the present invention.

While the present invention has been shown and described with reference to the embodiments of the embodiments of the present invention, it is understood that various changes may be made in the form and details thereof without departing from the spirit and scope of the invention.

S310, S320, S330, S340, S350‧‧‧ steps

Claims (10)

A method for segmentally touching data, comprising: selecting a first peak node having a first peak node value in the touch data of a touch panel; assigning a first label to the first peak node; The first region having the label first peak node and the at least one labelless neighbor node of the labeled first peak node; and the at least one of the first region according to the first label Unlabeled nodes are tagged. A method for segmenting touch data according to claim 1, wherein the first region comprises a matrix, the matrix comprising the at least one of the first peak node and the first peak node Label adjacent nodes. The method of claiming the segment touch data according to claim 1, wherein the tagging the at least one unlabeled neighbor node comprises: updating a current central node; storing node information of the current central node in a memory Selecting a tagged highest neighbor node of the current center node; and assigning the first tag to the current center node based on the node information stored in the memory. The method for segmenting touch data according to claim 3, wherein the tagging the at least one unlabeled neighbor node further comprises: if the node information is stored in the memory, a memory occurs. Body overflow, invalidating one or more unlabeled nodes based on the node information stored in the memory; The node information is emptied from the memory. The method of claiming a piece of touch data according to claim 3, wherein updating the current center node in the first zone comprises: selecting a tagless lowest neighbor node of the first peak node; and selecting The unlabeled lowest neighbor node is set to the current center node. The method of claiming a piece of touch data according to claim 3, wherein updating the current central node in the first zone comprises: selecting an unlabeled highest neighbor node of the current central node; The selected unlabeled highest neighbor node is set to the current center node. The method for segmenting touch data according to claim 1, further comprising: selecting a second peak node having the second peak node value in the touch data; assigning the second label to the a second peak node; searching for a second region comprising the tagged second peak node and the at least one unlabeled neighbor node of the second peak node; and pairing the second region according to the second tag The at least one unlabeled node is tagged. The method for segmenting touch data according to claim 1, further comprising: tracking the first peak node based on status information of one or more peak nodes in a previous frame of the touch data; And determining a state of the first peak node. A method of segmenting touch data as described in claim 8 of the patent scope, Determining, in the determining, the state of the first peak node, classifying the state of the first peak node into a non-touch based on the first peak node value, the first threshold value, and the second threshold value a first threshold value indicating a presence or absence of a touch on the touch panel, and the second threshold is a second reference for indicating whether the touch panel is completely touched, wherein the second threshold is greater than the first threshold. A touch sensor system comprising: a touch panel; and a touch controller configured to receive a touch signal from the touch panel, generate touch data based on the touch signal, assign a label Giving a peak node having a peak node value in the touch data, and performing segmentation of the touch data, the touch controller configured to select the tagged peak node and the tagged An unlabeled node in a first region of at least one unlabeled neighbor node of a peak node, storing the selected unlabeled node, and adding the selected unlabeled node in the first region according to the tag label.