KR20130115460A - Computing method for touch point of touch panel sensor and the touch panel sensor - Google Patents

Abstract

PURPOSE: A touch position measuring method of a touch panel sensor and a touch panel sensor using the method are provided to calculate a touch position more accurately than a case that touch coordinates of an object are calculated with an electrical change measured in all pattern units. CONSTITUTION: Pattern units (220) generate an electrical change according to a touch of an object and are arranged in one direction. A control unit (240) is connected with the pattern units and calculates reserve coordinates of the object by primarily using all of the pattern units. The control unit specifies a measurement pattern unit adjacent to the reserve coordinates and uses only an electrical change measured in the pattern unit in order to calculate actual coordinates. The control unit includes a set number from the closest pattern to the coordinates in the measurement pattern unit.

Description

TOUCH PANEL SENSOR AND THE TOUCH PANEL SENSOR}

The present invention relates to a touch panel sensor, and more particularly, to a touch position sensor and a touch panel sensor using the contact position measuring method of the touch panel sensor capable of calculating the coordinates of the object more accurately.

1 is a plan view illustrating an ITO thin film in a conventional capacitive touch screen, and FIG. 2 is a plan view illustrating a conventional capacitive touch screen operating mechanism.

Referring to FIG. 1, a conventional touch screen electrically detects a contact of a finger. A finger is a type of conductor through which electricity can flow, and when a finger comes close to an electrode, charge can be collected between the electrode and the finger. As the charge is collected, it becomes possible to measure the capacitance or capacitance between the finger and the electrode, which can be used to indirectly detect the touch of the finger.

In addition, since the touch screen should not obstruct the rear liquid crystal monitor or other display, the electrode of the touch screen may be formed of a transparent transparent electrode material, such as indium tin oxide (ITO) or IZO, as electricity flows. .

1A illustrates a transparent electrode pattern oriented in the vertical direction (y-axis direction). The vertically oriented transparent electrode patterns are formed on the transparent film 20 provided with a material such as a transparent plastic sheet or glass, and the transparent electrode patterns are vertical node patterns 22 and vertical node patterns 22 formed at uniform intervals. It is formed by the vertical connection pattern 24 which connects vertically.

In FIG. 1B, a transparent electrode pattern oriented in the horizontal direction (x-axis direction) is illustrated, and a transparent electrode pattern oriented in the horizontal direction is also formed on the transparent film 30, and the transparent electrode pattern is also The horizontal node pattern 32 and the horizontal node pattern 32 which are formed at uniform intervals are horizontally connected to each other.

In general, a conventional touch screen can be formed by adhering the ITO transparent sheet of (a) and the ITO transparent sheet of (b) up and down. The structure in which the two transparent sheets are bonded is shown in FIG.

As shown in the figure, the horizontal node pattern 32 in the horizontal direction and the vertical node pattern 22 in the vertical direction are staggered with each other, and the fine connection patterns connecting each electrode have a vertically crossing structure. These connection patterns are separated by a transparent sheet or other insulating means.

According to the touch screen structure shown in FIG. 1C, signal strengths of the transparent electrode patterns oriented vertically and horizontally vary according to the touched position, and horizontal and vertical coordinates can be calculated according to the signal strengths. .

Hereinafter, a method of calculating the position where the finger touches the touch screen will be described.

In the transparent electrode patterns oriented vertically and horizontally by a finger contact with the touch screen 10, the respective signal strengths may be measured, and horizontal and vertical coordinates (x, y) may be determined from the signal strengths. It is then calculated as the intersection of the horizontal and vertical coordinate directions.

However, since more than one finger may actually be in contact with the node pattern, signals of the horizontally or vertically oriented transparent electrode patterns generated in contact with the finger may not be detected as a single pulse, but may be detected in a plurality. Is common. In this case, for example, the pulse value having the maximum intensity may be selected as the pulse value having the maximum intensity among the changed intensity values of each signal, and the position of the point 22 where the finger touches may be determined based on this.

Referring to FIG. 2, a case of multi-contact in which two fingers are in contact with the touch screen 21 may be considered. In the case of a multi-contact, two or more fingers may be brought into contact with the pad at the same time to express a predetermined function. For example, a double click may be defined in response to the multi-contact, or may be defined to enlarge or reduce the screen.

By the way, as shown in the figure, when two fingers are in contact with the horizontal node pattern 32 on the same line, it is possible to calculate the coordinates x1 and x2 for the horizontal axis, but it is difficult to calculate the coordinates y1 and y2 for the vertical axis. Cases may occur. In a conventional touch panel, an error may occur in the case of multi-contact.

The present invention provides a contact position measuring method of a touch panel sensor and a touch panel sensor using the contact position measuring method which can more accurately calculate the coordinates of the object touched by the touch panel sensor.

According to an exemplary embodiment of the present invention for achieving the above object of the present invention, the contact position measuring method of the touch panel sensor for measuring the contact position of the object to approach through a plurality of pattern parts arranged in one direction is First calculating preliminary coordinates of the object by using all of the plurality of pattern portions, specifying an actual pattern portion adjacent to the preliminary coordinates among the plurality of pattern portions, and measuring the measured pattern portion among the plurality of pattern portions Recalculating the actual coordinates using only the changed electrical changes.

Meanwhile, in the step of specifying the measured pattern portion, the measured pattern portion may include as many as a predetermined number from the pattern portion nearest to the preliminary coordinates. For example, only the second or third closest to the left and right patterns from the preliminarily measured preliminary coordinates may be used for recalculation, and the number may be changed according to the designer's intention.

In addition, in the step of specifying the measurement pattern portion, the controller may include the pattern portion that enters within a predetermined region, which is preset based on the preliminary coordinates, as the measurement pattern portion. For example, the area may be limited to a few centimeters in radius from the preliminary coordinates.

In other words, the present invention obtains preliminary coordinates calculated primarily from electrical changes measured in all pattern portions, and recalculates the actual coordinates only by electrical changes generated from the pattern portions near the preliminary coordinates, thereby measuring the electrical coordinates measured in all pattern portions. If the change is used to calculate the touch coordinates of the object, a more accurate touch position can be calculated.

For reference, in this specification, one direction may correspond to a specific direction such as an x direction or a y direction in the touch area of the touch panel sensor, and the horizontal and vertical directions may correspond to the x direction and the y direction, respectively. . In particular, the vertical node pattern portion and the horizontal node pattern portion which form a line may be arranged in two directions of x and y perpendicular to each other on the display to which the touch panel sensor is attached.

Hereinafter, representative examples of structures and shapes of various pattern parts that the touch panel sensor of the present invention may have will be described.

For example, when one direction corresponds to the x-axis direction, each pattern portion may include a plurality of resistance electrodes arranged side by side in the x-axis direction, and at least one of the plurality of resistance electrodes may be in the y-axis direction. It is available in different lengths. Each pattern part is connected to a control part, and the control part can recognize the position of the pattern part where the electrical change is measured as the x coordinate touched by the object, and can recognize the y coordinate from the resistance electrode having a different length of each pattern part. have.

In addition, when one direction corresponds to the x-axis direction, the width of each pattern portion may gradually change with respect to the y-axis direction. Looking at one specific shape, the pattern portion may be formed in a triangular shape extending in the y-axis direction, the plurality of pattern portion may be arranged side by side in the x-axis direction at uniform intervals. The x-coordinate can be measured from the pattern portion where the electrical change is measured, and the y-coordinate can be calculated by the controller because the amount of electrical change can be measured differently according to the point where the pattern portion is contacted for the reason of the width difference in the y-axis direction.

In addition, when one direction corresponds to the x-axis direction, each pattern portion has first and second vertical node patterns that are adjacent to each other but electrically separated from each other, and a plurality of vertical node pattern portions that form a plurality in a line in the y-axis direction. It may include. In this case, the resistance ratios of the first and second vertical node patterns may be different from each other in the vertical node pattern units adjacent to each other.

Further, the first vertical node pattern is electrically connected to another first vertical node pattern of neighboring vertical node pattern portions among the vertical node pattern portions in a row, and gradually increases in area or thickness with respect to a sequence of the second vertical node pattern portions. The node pattern is also electrically connected to another second vertical node pattern of neighboring vertical node pattern portions among the vertical node pattern portions in a row, and the area or thickness may gradually decrease with respect to the sequence.

In addition, each of the vertical node pattern portions may be formed within a predetermined area, and a series of vertical node pattern portions may be arranged in order of increasing or decreasing area, respectively.

Further, since the vertical node pattern portion is provided with a resistance ratio between the first vertical node pattern and the second vertical node pattern differently, the position on the x-axis of the touched point specifying which vertical node pattern portion is touched or where it is touched in the x-coordinate. It can be specified, and by varying the resistance ratio of the first vertical node pattern and the second vertical node pattern, it is also possible to specify the position on the y-axis of the touched point.

In addition, when the touch panel sensor further includes a horizontal node pattern portion arranged to form a plurality of lines in the x-axis direction to be insulated from the vertical node pattern portion, the additional object of the subject is based on the electrical change detected in the horizontal node pattern portion. The y coordinate can be calculated.

In addition, the horizontal node pattern portion may also include first and second horizontal node patterns, which are adjacent to each other and electrically separated from each other, as if the vertical node pattern portion, and the first and second horizontal in the adjacent horizontal node pattern portion The resistance ratio of the node pattern may be provided differently. In this case, it is possible to obtain the x coordinate in addition to the y coordinate by using the horizontal node pattern portion.

In the above-described touch panel sensor, the vertical node pattern portion or the horizontal node pattern portion may be disposed on the front and rear surfaces of one sheet to be insulated from each other, and in some cases, may be provided on different sheets.

Further, each horizontal node pattern portion may be integrally formed without being separated like the vertical node pattern portion described above. These horizontal node pattern portions may be arranged in a line in the y-axis direction to specify positions on the y-axis. Therefore, when two or more fingers are simultaneously touched horizontally on the y axis, a sheet provided with a horizontal node pattern portion for specifying a position on the y axis cannot function properly. In the touch panel sensor according to the present invention, the vertical node Since the position on the x-axis and the position on the y-axis can also be specified in the sheet on which the pattern portion is disposed, errors due to simultaneous contact can be compensated for.

The touch panel sensor described above may be used as a touch screen using a transparent sheet and a transparent electrode, and may also be used as a general touch pad by being formed using an opaque material.

For reference, the divided first and second vertical node patterns may define one vertical node pattern part, and the vertical node pattern parts are provided in a line but are two-dimensionally arranged regardless of shape to provide information about two axes. It is possible to recognize at the same time.

The description of the vertical node pattern portion may be equally applied to the horizontal node pattern portion. For example, in some cases, the horizontal node pattern portion may also be adjacent to each other and electrically separated from each other like the vertical node pattern portion. And a second horizontal node pattern. In this case, resistance ratios of the first and second horizontal node patterns may be different from each other in the neighboring horizontal node pattern units. In this case, not only the y coordinate but also the x coordinate can be calculated through the horizontal node pattern portion.

The coordinate calculation of the touch point of the object may be calculated as follows, and the same method may be used for calculating the preliminary coordinates or recalculating the preliminary coordinates using adjacent measurement patterns.

When the vertical node pattern portion in a row is disposed in the vertical direction in the touch panel sensor, the x coordinate is provided through {(n1 * 1) + (n2 * 2) + to (nk * k)} / (n1 + n2 + to nk). Wherein x coordinate is defined as a direction perpendicular to the vertical node pattern portion in a row, y coordinate is defined as a direction parallel to the vertical node pattern portion in a row, k is a vertical node pattern portion in each row, nk corresponds to the sum of electrical changes detected in the first and second node patterns included in each vertical node pattern portion in each row of vertical node pattern portions.

In addition, when the vertical node pattern portions in a row are arranged in the vertical direction in the touch area of the touch panel sensor, the x coordinate is defined as a direction perpendicular to the pattern portion, and the y coordinate is defined as a direction parallel to the pattern portion, and the first vertical node pattern is A (y) is the area of the overlapping object, C (y) is the electrical change, and B (y) is the area of the object overlapping with the second vertical node pattern paired with the first vertical node pattern. In the case of D (y), the y coordinate can be calculated by comparing the value of A (y) / B (y) with the total length of the y coordinate.

In another embodiment of the present invention, a touch panel sensor for measuring a contact position of an object approaching a touch area is revealed. The touch panel sensor may have an electrical change according to the contact of the object, and may be electrically connected to the plurality of pattern portions arranged in one direction, and the pattern portion, and may be formed by using all of the plurality of pattern portions. After calculating the preliminary coordinates of, and measuring the measurement pattern portion adjacent to the preliminary coordinates of the plurality of pattern portions, and may include a control unit for recalculating the actual coordinates using only the electrical change measured in the measurement pattern portion.

In the present invention, when the object is touched by the touch panel sensor, preliminary coordinates are primarily measured through all the pattern parts, and the actual coordinates are remeasured secondarily by using only the pattern parts close to the primary measured preliminary coordinates. Therefore, it is possible to calculate a more accurate touch position than when calculating the touch coordinates of the object by the electrical changes previously measured in all pattern parts.

In addition, when a finger is touched on the touch panel sensor, elements other than the finger may have an electrical influence on the pattern portion (for example, a hand that grips the touch panel sensor or a touch panel sensor). Adhered dust) may be present, and these elements may interfere with measuring the correct touch position of the finger. However, through the process of selecting the measured pattern portion, it may be closer to the electrical change that the subject (finger finger) actually wants to measure the position of than the other elements such as the hand or the dust. It is possible.

Further, in the present invention, the vertical node pattern portion is divided into two node patterns, and the resistance ratio between these node patterns is different, so that the sheet in which the vertical node pattern portion is disposed, as compared with the prior art, which can specify only one of the x-axis and y-axis positions. The position on the x-axis and the position on the y-axis can also be specified, so that errors due to simultaneous contact can be compensated for.

1 is a plan view illustrating an ITO thin film in a conventional capacitive touch screen.
2 is a plan view illustrating a conventional capacitive touch screen operating mechanism.
3 is a control flowchart of a method for measuring a contact position of a touch panel sensor according to the present invention.
4 is a plan view corresponding to an example touch panel sensor to which a method for measuring a contact position of a touch panel sensor according to the present invention may be applied.
5 is a plan view corresponding to another example of the touch panel sensor to which the method for measuring a contact position of the touch panel sensor according to the present invention may be applied.
6 is a plan view of a touch panel sensor displaying preliminary coordinates and actual coordinates in another example of the touch panel sensor to which the method for measuring a contact position of the touch panel sensor according to the present invention may be applied.
FIG. 7 is a plan view illustrating a first electrode sheet of the touch panel sensor of FIG. 6.
FIG. 8 is a plan view illustrating a second electrode sheet of the touch panel sensor of FIG. 6.
FIG. 9 is a plan view illustrating a method in which the first electrode sheet and the second electrode sheet of FIGS. 7 and 8 are stacked to provide a touch panel sensor.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments. For reference, the same numbers in this description refer to substantially the same elements and can be described with reference to the contents described in the other drawings under these rules, and the contents which are judged to be obvious to the person skilled in the art or repeated can be omitted.

3 is a control flowchart of a method for measuring a contact position of a touch panel sensor according to the present invention.

Referring to FIG. 3, in the method for measuring a contact position of a touch panel sensor according to the present disclosure, the method may further include preliminarily calculating preliminary coordinates of an object by using all of the plurality of pattern units (S110), and preliminary coordinates among the plurality of pattern units. Specifying the measured pattern portion adjacent to (S120), and re-calculating the actual coordinates using only the electrical change measured in the measured pattern portion of the plurality of pattern portion (S130).

Hereinafter, various touch panel sensors to which the method for measuring a contact position of the touch panel sensor according to the present invention will be described.

4 is a plan view corresponding to an example touch panel sensor to which a method for measuring a contact position of a touch panel sensor according to the present invention may be applied.

Referring to FIG. 4, the tomography type touch panel sensor for detecting a contact position of a part of a body includes a transparent insulating substrate 110, a pattern unit 120, and a controller 140.

Since the touch panel sensor is located on the outer surface of the device where the touch screen is used so that the user can detect the touch screen, the insulating substrate 110 used for the touch panel sensor covers the liquid crystal monitor or other display on the back side. The transparent material may be selected and manufactured so as to be prepared, for example, using a material such as a transparent plastic sheet or glass. In this case, the insulating substrate 110 may be selected as a light-transmissive material, but may be selected as an insulating material so that a current does not flow with the pattern portion 120 to be described later.

Four pattern units 120 are arranged side by side in the x-axis direction on the insulating substrate 110 described above, and the number thereof may be changed. Each pattern unit 120 may include a plurality of resistance electrodes 122. Like the insulating substrate 110 described above, the resistance electrode 122 is made of a material that transmits light transmitted through a liquid crystal monitor or other display provided on the rear surface and is electrically conductive. As such a material, indium tin oxide (ITO) or indium zinc oxide (IZO) may be used.

Here, the lengths of each of the six resistance electrodes 122 included in each pattern portion 120 are provided with different lengths with respect to the y-axis direction. Specifically, the resistance electrode 122 is arranged sequentially from the longest resistance electrode 122 along the x-axis direction, the resistance electrodes 122 having a gradually shorter length at a uniform interval, in this embodiment Each pattern unit 120 includes six resistance electrodes 122, but the number can be changed as many as possible. In particular, in order to increase the resolution of the touch screen, a larger number of resistance electrodes 122 can be arranged. Can be.

For reference, in the present embodiment, the length difference between the mutually adjacent resistance electrodes 122 included in each pattern portion 120 is constant, but in some cases, the difference may be manufactured differently. In addition, although the resistance electrode 122 is arranged on the same transparent insulating substrate 110 in the x-axis direction, the resistance electrode may also be arranged in the y-axis direction.

Each of the resistance electrodes 122 provided as described above is electrically connected to the controller 140, which may be provided as a capacitive sensor chip through a connection line 124 provided as a transparent and electrically conductive material.

In addition, each of the resistive electrodes 122 may be provided in a straight line shape, and the gradient of the resistive electrode 122 on the insulating substrate 110 may be more sensitively sensed to change in capacitance generated when the fingers are adjacent to each other. You can do it more tightly.

By using the pattern unit 120 described above to measure the change in capacitance between the body part and the electrode by the contact of the body part, such as the user's finger, to detect the touch of the body part and to measure the position It demonstrates in detail.

The horizontal and vertical positions of the position where the user's finger is touched on the touch screen are measured by the controller 140 detecting the resistance electrode 122 having a change in capacitance.

The control unit 140 of the present exemplary embodiment may be provided as a capacitive sensor chip including a plurality of lead wires, and each of the resistance electrodes 122 may be electrically connected to the lead wire 142 of the control unit 140 in a one-to-one manner. Connected.

Among the positions where the finger is touched on the touch screen, the horizontal position, that is, the coordinates in the x-axis direction, calculates preliminary coordinates of the finger by using the change in capacitance generated in all the pattern units 120 when the finger is touched. By using only the specific pattern unit 120 adjacent to the preliminary coordinates, the actual coordinates (x coordinates) may be calculated. Similarly, the y coordinate can be calculated through two calculations.

Through this recalculation process, electrical changes due to factors that may affect the pattern part (eg, the hand that grips the touch panel sensor or dust on the touch panel sensor) in addition to the finger are possible. It is possible to exclude, thereby allowing a more accurate calculation of the position where the finger to actually measure the position is touched.

5 is a plan view corresponding to another example of the touch panel sensor to which the method for measuring a contact position of the touch panel sensor according to the present invention may be applied.

Referring to FIG. 5, the touch panel sensor includes a transparent insulating substrate 210, a pattern unit 220, and a controller 240. In the present embodiment, a description will be given of the pattern portion 220 having a difference in shape from the previous embodiment.

A plurality of pattern units 220 are arranged side by side in the x-axis direction on the above-described insulating substrate 210. Each pattern portion 220 gradually changes in its width in the y-axis direction and is provided in a substantially triangular shape.

Accordingly, when the fingers are adjacent to each other, an electrical change occurs in each pattern unit 220. Using the pattern unit 220 in which the electrical change occurs, the x coordinate position can be calculated by the controller 240, and the y coordinate is the width thereof. Different for these heights, the difference can be calculated based on the amount of electrical change.

Of course, in the present embodiment, as in the previous embodiment, the preliminary coordinates are first calculated using the electric change values obtained from all the pattern units 220, and again, the actual coordinates are again obtained using only the adjacent pattern unit 220 from the preliminary coordinates. Can be calculated

6 is a plan view of a touch panel sensor displaying preliminary coordinates and actual coordinates in another example of a touch panel sensor to which a method for measuring a touch position of a touch panel sensor according to the present invention is applied, and FIG. 7 is a touch panel sensor of FIG. 6. FIG. 8 is a plan view for describing the first electrode sheet, and FIG. 8 is a plan view for explaining the second electrode sheet of the touch panel sensor of FIG. 6, and FIG. 9 is a touch panel in which the first electrode sheet and the second electrode sheet are stacked. It is a top view for demonstrating providing a sensor.

6 to 9, a touch position sensor and a touch position measuring method of a touch panel sensor applicable to the sensor will be described.

In the method for measuring the contact position of the touch panel sensor according to the present invention, detecting the electrical change formed by approaching the object on the touch panel sensor in each of the vertical node pattern portions in every row, and in the vertical node pattern portions in every row. Obtaining preliminary coordinates of the subject by first calculating the x and y coordinates of the subject based on the detected electrical change, and obtaining a measurement pattern portion by specifying a vertical line pattern portion of a portion of the line adjacent to the first calculated preliminary coordinate. And recalculating the x and y coordinates of the object based on the electrical change detected by the measured pattern portion to obtain actual coordinates.

That is, by first obtaining the predicted coordinates calculated from the electrical changes measured in the vertical node pattern portions of all the lines and recalculating the actual coordinates only by the electrical changes generated from the vertical node pattern portions in the vicinity of the coordinates, a more accurate touch. The position can be calculated.

The first electrode sheet includes a first sheet 310 and vertical node pattern portions 321 to 328 formed on the first sheet 310. The vertical node pattern portions 321 to 328 are arranged up and down, and six lines of pattern portions provided by each arrangement are provided. The vertical node pattern units 321 to 328 include first vertical node patterns 321a and 322a and second vertical node patterns 321b and 322b, respectively. The vertical node pattern portions 321 to 328 may be provided in a rhombus or quadrangular shape based on one vertical line. From the top, the first vertical node pattern and the second vertical node pattern may be provided based on sides facing each other. Divided into. In this case, the ratio of the height (d: D) from the top of the first vertical node pattern and the second vertical node pattern is (1: 8), (2: 7), (3: 6), (4: 4), (5 : 4), (6: 3), (7: 2), (8: 1), and the area ratio between both patterns is also changed according to the height ratio.

The first vertical node patterns 321a and 322a are vertically connected by the first vertical connection pattern 329a, and the area increases stepwise from the first vertical node pattern positioned at the top. On the contrary, the second vertical node patterns 321b and 322b are vertically connected by the second vertical connection pattern 329b, and the area is gradually reduced from the second vertical node pattern positioned at the top.

The first sheet 310 may be formed using a material such as plastic or glass such as polyethylene, polypropylene, acryl, polyethylene terephthalate (PET), and the like. In addition, even if a transparent material is not used, an insulating substrate may be used in a pointing device using a touch pad or a stylus fan used in a notebook.

The vertical node pattern parts 321 to 328 described above may also be selected differently according to the use of the touch panel sensor. For example, when light transmittance is required, such as a touch screen, materials such as ITO and IZO may be selected. On the contrary, when it is not necessary to consider the light transmittance, various metals or alloys such as gold, silver and aluminum having conductivity can be used as the material of the resistance electrode.

In the vertical node pattern portion, the first vertical node patterns 321a and 322a are interconnected, and the second vertical node patterns 321b and 322b are also interconnected. The location of the connection can also be selected in various ways.

Hereinafter, a process of obtaining the x coordinate using the vertical node pattern parts 321 to 328 will be described.

Referring to FIG. 7, six lines of vertical node pattern portions 321 to 328 that extend up and down are provided, and are provided in substantially the same pattern arrangement. The x-coordinate may be determined by the formula {(n1 * 1) + (n2 * 2) + to (nk * k)} / (n1 + n2 + to nk), where k is an angle relative to one of the drawings. Number by line, where nk is the sum of the signal strengths detected in the first and second vertical node patterns in the lines of each number.

For example, an object, i.e., a finger, is touched on the touch screen so that the intensity of the electrical signal coming into the controller is 60 through the first vertical note pattern of the fourth line from the left. While the signal strength is 70 through the pattern and the signal strength in the remaining first vertical node pattern is 0, the signal strength is 80 through the second vertical node pattern of the third line and the second vertical node pattern of the fourth line. If the signal strength of 100 and the signal strength of the second vertical node pattern of the fifth line is measured as 90, the x-coordinate can be obtained by substituting the above-mentioned numbers in the above-described formula. Substituting the above-described value into the equation, x coordinate = {(80 * 3) + (160 * 4) + (160 * 5)} / (80 + 160 + 160) = 4.2.

Here, the above calculation may be understood as preliminarily calculating the preliminary coordinates using the vertical node pattern parts of all the lines.

The measured pattern portion may recalculate the x coordinate by using only a row of vertical node pattern portions forming the fourth and fifth lines adjacent to the 4.2 x coordinate. The actual x-coordinates recalculated are {(160 * 4) + (160 * 5)} / (160 + 160) = 4.5. For reference, in this embodiment, only one pattern portion in a row adjacent to the left and right sides is selected one by one, but in other embodiments, the number may be changed. The y-coordinate value described later may also go through the same process.

In addition, the x coordinate may be obtained by calculating the x coordinate between the first vertical node patterns in the same direction and then averaging them again. The specific equation may be based on 1/2 {(Σn1k * k) / (Σn1k) + (Σn2k * k) / (Σn2k)}, where k is the number of lines in the vertical node pattern, n1k and n2k are each The strength of the capacitance, measured through the first and second vertical node patterns.

Hereinafter, a process of obtaining y coordinates using the vertical node pattern units 321 to 328 will be described.

The vertical position of the finger in contact with the touch panel sensor is determined by comparing the signal values measured from the two electrode patterns by using the first and second vertical node patterns as a pair. For reference, when the finger approaches the first vertical node pattern and the second vertical node pattern, the intensity of the signal respectively input to the controller is proportional to the area where the finger touches.

Corresponding to the y coordinate to be specified, the area of the finger in contact with the first vertical node pattern is called A (y), and the intensity of the signal is called C (y), and the area of the finger in contact with the paired second vertical node pattern The area is called B (y) and the signal strength is assumed to be D (y).

In other words, the signal strengths from the first and second vertical node patterns input to the controller are proportional to A (y) and B (y), respectively, where A (y) / B (y) = C (y) / D ( y) is established.

The controller calculates the C (y) / D (y) values, compares them with the area ratio A (y) / B (y), and converts them to y. In general, A (0.5) / B (0.5) is 1 when y (0 <y <1) is 1/2, and A (1) / when the best pattern (y = 1) of the first vertical node pattern portions. B (1) is 1/8, and A (0) / B (0) becomes 8 when the lowest pattern (y = 0). According to this change in value, the y-coordinate value can be obtained from A (y) / B (y).

Actually, the area touched by the finger is much larger than the resolution and overlaps several lines, so this value is read and calculated to convert to coordinates in the resolution.

As in the previous example, the signal strength through the first vertical note pattern was 60 in the fourth line from the left of the line of the vertical node pattern portion, the signal strength through the second vertical node pattern was 100, and Assume that the signal strength through the first vertical note pattern is 70 and the signal strength through the second vertical node pattern is 90. The intensity of the signal by the first vertical node pattern is 130 and the intensity of the signal by the second vertical node pattern is 190. That is, C (y) is 130, D (y) is 190, and C (y) / D (y) is about 0.68.

Therefore, the position where A (y) / B (y) is 0.68 is when y is about 0.65, that is, when the length of the touch panel sensor is 100mm, it can be recognized as about 65mm.

As described above, the coordinate values of x and y may be calculated again based only on the intensity of the electric signal coming from one or two lines adjacent to the left or right based on the first calculated x and y coordinates. Alternatively, the coordinates may be recalculated using only a series of pattern portions covering an area within a predetermined distance from the coordinates calculated primarily. The calculation process of the x- and y-coordinates described above may occur at the same time.

Referring to FIG. 8, the second electrode sheet includes a second sheet 330 and horizontal node pattern portions 341 to 347 formed on the second sheet 330. The horizontal node pattern portions 341 to 347 are arranged to the left and right, and the lines of the pattern portions provided by the respective arrangements are provided up to seven. The horizontal node pattern portions 341 to 347 are integrally formed differently from the vertical node pattern portions, and the horizontal node pattern portions 341 to 347 are connected to the left and right by the horizontal connection pattern 349. The horizontal node pattern parts 341 to 347 may be provided in a rhombus or quadrangle form based on one horizontal line.

The second sheet 330 may be formed of substantially the same material as the first sheet 310.

Since the horizontal node pattern portions arranged in a horizontal line are different from each other in height, the y coordinate can be calculated using the horizontal node pattern portions 341 to 347.

In some cases, when the horizontal node pattern portion is also divided into the first and second horizontal node patterns similarly to the vertical node pattern portion, the y coordinate as well as the x coordinate may be calculated. A method using a node pattern unit may be used, and a redundant description thereof will be omitted.

FIG. 9 is a plan view illustrating a method of providing a touch panel sensor 300 by stacking a first electrode sheet and a second electrode sheet.

Referring to FIG. 9, a first electrode sheet including vertical node pattern parts 321 to 328 and a second electrode sheet including horizontal node pattern parts 341 to 347 are stacked up and down. The first electrode sheet and the second electrode sheet may be stacked up or down, but are preferably electrically separated by an insulating material or an insulating film between the layers.

According to the present embodiment, even if two fingers touch the same line on the same horizontal node pattern portion simultaneously, the x coordinate and the y coordinate of the finger contact point can be calculated in the first electrode sheet having the vertical node pattern portion. Through this supplementation, even if one point contact as well as two or more points are defined and used, it is possible to ensure stable use without errors.

In addition, accurate coordinates can be obtained by recalculating the coordinates second by using horizontal or vertical node pattern portions of adjacent lines in the coordinates calculated primarily.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

100: Touch panel sensor 310: First sheet
321 to 328: vertical node pattern portions 321a and 322a: first vertical node pattern
321b and 322b: 1st vertical node pattern 341-347: horizontal node pattern part

Claims (21)

In the contact position measuring method of the touch panel sensor for measuring the contact position of the object to approach through a plurality of pattern parts arranged in one direction,
Firstly calculating preliminary coordinates of the object by using all of the plurality of pattern portions;
Specifying a measurement pattern part adjacent to the preliminary coordinates among the plurality of pattern parts; And
Recalculating actual coordinates using only electrical changes measured by the measured pattern unit among the plurality of pattern units;
Method for measuring the contact position of the touch panel sensor comprising a. The method of claim 1,
In the step of specifying the measurement pattern portion,
And a predetermined number of points from the pattern part closest to the preliminary coordinates to the measured pattern part. The method of claim 1,
In the step of specifying the measurement pattern portion,
And a pattern part coming into the predetermined pattern area based on the preliminary coordinates as the measurement pattern part. The method of claim 1,
When the one direction corresponds to the x-axis direction,
Each of the pattern parts includes a plurality of resistance electrodes arranged side by side in the x-axis direction, and at least one of the plurality of resistance electrodes is provided with a different length with respect to the y-axis direction. Position measuring method. The method of claim 1,
When the one direction corresponds to the x-axis direction,
And the width of each of the pattern portions is gradually changed with respect to the y-axis direction. The method of claim 5,
Wherein the pattern portion is formed in a triangular shape extending in the y-axis direction, the plurality of pattern portion is a contact position measuring method of the touch panel sensor, characterized in that arranged side by side in the x-axis direction at uniform intervals. The method of claim 1,
When the one direction corresponds to the x-axis direction,
Each of the pattern parts includes first and second vertical node patterns adjacent to each other and electrically separated from each other, and each of the pattern parts includes a vertical node pattern part forming a plurality of lines in the y-axis direction.
The method of measuring the contact position of the touch panel sensor, characterized in that the resistance ratio of the first and second vertical node pattern is different in the adjacent vertical node pattern portion. The method of claim 7, wherein
When the touch panel sensor further comprises a horizontal node pattern portion arranged to form a plurality in a line in the x-axis direction to be insulated from the vertical node pattern portion,
And a method for calculating the additional y-coordinate of the object based on the electrical change detected by the horizontal node pattern unit. 9. The method of claim 8,
Each of the horizontal node pattern parts includes first and second horizontal node patterns adjacent to each other and electrically separated from each other, and the touch panel sensor having different resistance ratios of the first and second horizontal node patterns from the adjacent horizontal node pattern parts. How to measure the position of contact. The method of claim 7, wherein
Each of the vertical node pattern portions is formed within a predetermined area of the contact position measuring method of the touch panel sensor. The method of claim 7, wherein
The first vertical node pattern is electrically connected to another first vertical node pattern of neighboring vertical node pattern portions of the vertical node pattern portions in a row, and gradually increases in area or thickness for a sequence of
The second vertical node pattern is also electrically connected to another second vertical node pattern of neighboring vertical node pattern parts among the vertical node pattern parts in a row, and the touch is characterized in that the area or thickness gradually decreases for a series of orders. How to measure the contact position of panel sensor. The method of claim 7, wherein
The vertical node pattern portion in a row is a touch position measuring method of the touch panel sensor, characterized in that the area is arranged in order of increasing or decreasing. The method of claim 7, wherein
When the vertical node pattern portion in a row is disposed in the vertical direction in the touch panel sensor, x through {(n1 * 1) + (n2 * 2) + to (nk * k)} / (n1 + n2 + to nk) Calculate the coordinates,
Here, x coordinate is defined as a direction perpendicular to the vertical node pattern portion in a row, y coordinate is defined in a direction parallel to the vertical node pattern portion in a row, k is the vertical node pattern portion in each row, and nk is each And a sum of electrical changes detected in the first and second node patterns included in each of the vertical node pattern parts in the vertical node pattern parts in a row of the touch panel sensors. The method of claim 7, wherein
When the vertical node pattern portion in a row is disposed in the vertical direction in the touch area of the touch panel sensor, x coordinate is a direction perpendicular to the vertical node pattern portion in a row, and y coordinate is a vertical node pattern portion in a row. The area of the object defined in the side-by-side direction and overlapping the first vertical node pattern is A (y), the electrical change is C (y), and is overlapped with the second vertical node pattern paired with the first vertical node pattern. When the area of the subject is B (y) and the electrical change is D (y),
The y coordinate is calculated by comparing the value of A (y) / B (y) with the length of the overall y coordinate. In the touch panel sensor for measuring the contact position of the object to approach,
An electrical change occurs according to the contact of the object, and a plurality of pattern parts arranged in one direction; And
The measurement pattern is electrically connected to the pattern portion, and after preliminarily calculating the preliminary coordinates of the object using all of the plurality of pattern portions, and specifying the measured pattern portion adjacent to the preliminary coordinates among the plurality of pattern portions. A control unit for recalculating the actual coordinates using only the electrical change measured by the unit;
Touch panel sensor comprising a. 16. The method of claim 15,
The controller may include as many numbers as a preset number from the pattern part closest to the preliminary coordinates as the measured pattern part.
And a pattern part coming into a predetermined area predetermined based on the preliminary coordinates as the measurement pattern part. 16. The method of claim 15,
When the one direction corresponds to the x-axis direction,
Each of the pattern parts includes first and second vertical node patterns adjacent to each other and electrically separated from each other, and each of the pattern parts includes a vertical node pattern part forming a plurality of lines in the y-axis direction.
And the resistance ratios of the first and second vertical node patterns in the adjacent vertical node pattern parts are different from each other. 18. The method of claim 17,
Further comprising a horizontal node pattern portion arranged to form a plurality in a row in the x-axis direction to be insulated from the vertical node pattern portion,
And the controller calculates an additional y-coordinate of the object based on the electrical change detected by the horizontal node pattern unit. 18. The method of claim 17,
The first vertical node pattern is electrically connected to another first vertical node pattern of neighboring vertical node pattern portions of the vertical node pattern portions in a row, and gradually increases in area or thickness for a sequence of
The second vertical node pattern is also electrically connected to another second vertical node pattern of neighboring vertical node pattern parts among the vertical node pattern parts in a row, and the touch is characterized in that the area or thickness gradually decreases for a series of orders. Panel sensor. 18. The method of claim 17,
When the vertical node pattern portion in a row is disposed in the vertical direction in the touch panel sensor, the controller is {(n1 * 1) + (n2 * 2) + to (nk * k)} / (n1 + n2 + to nk) To calculate the x coordinate,
Here, x coordinate is defined as a direction perpendicular to the vertical node pattern portion in a row, y coordinate is defined in a direction parallel to the vertical node pattern portion in a row, k is the vertical node pattern portion in each row, and nk is each And a sum of electrical changes detected in the first and second node patterns included in each of the vertical node pattern parts in the vertical node pattern parts in a row of lines. 18. The method of claim 17,
When the vertical node pattern portion in a row is disposed in the vertical direction in the touch area of the touch panel sensor,
Here, x coordinate is defined as a direction perpendicular to the vertical node pattern portion in a row, y coordinate is defined in a direction parallel to the vertical node pattern portion in a row, and the area of the object overlapping the first vertical node pattern is A (y When the electrical change is C (y), the area of the object overlapping the second vertical node pattern paired with the first vertical node pattern is B (y), and the electrical change is D (y),
And the controller calculates y coordinates by comparing the values of A (y) / B (y) with the total length of y coordinates.

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