JPH08147091A - Plural-point input touch panel and coordinate calculating method therefor - Google Patents

Abstract

PURPOSE: To enable the simutaneous input of plural points by using an existing line sensor, neither sharing a cross point, generating a ghost point nor setting a limit to a touch location, regarding a touch panel simultaneously inputting plural points. CONSTITUTION: By using a parallel sensing line extending in three directions or more or a radial sensing line making three points or more as centers and placing a transmission module and a reception module at one end of each sensing line and at the other end, respectively, the intersected point Pc of the sensing line corresponding to at least of the two reception modules is determined, for instance. The distance Zr of the sensing line corresponding to other reception module and the intersected point Pc is determined and the distance Zr makes the point Pc which is a prescribed threshold d or below a touch point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device, for example, a multi-point input touch panel in a graphic processing device, and more specifically, to press an operation mode button (graphic moving mode, magnifying mode) on the screen with the left hand. Then, the present invention relates to a touch panel for inputting a plurality of points for instructing a figure to be operated with a right hand and performing a predetermined operation (movement, enlargement, reduction, etc.). Such an operation is often used in a data processing device having a computer aided design (CAD) function.

[0002]

2. Description of the Related Art FIG. 8 is a diagram showing a configuration example of a data processing device, FIG. 9 is a diagram illustrating a conventional multi-point input touch panel, and FIG. 10 is a configuration example of the touch panel. 10A shows an example of an electromagnetic induction (magnetostriction delay) system, and FIG. 10B shows an example of an ultrasonic system.

The touch panel is, for example, a device in which a touch sensor plate is placed on a CRT screen and the position information is input by directly pushing the CRT screen with a fingertip or another object. In FIG. It is shown as a touch panel 30 on the integrated display device 3.

In the data processing device having the computer aided design (CAD) function, the central processing unit (CPU) 1 is the main storage device.
Predetermined computer aided design (CAD) deployed on (MM) 2
By executing the program 20, desired computer aided design (CAD), for example, graphic processing is performed.

At this time, in the touch panel integrated type display device 3, as described above, the predetermined operation mode button (moving mode of graphic, enlargement mode) on the screen is pressed with the left hand, and the graphic to be operated is displayed with the right hand. Instruct and perform a predetermined operation
By performing (moving, enlarging, reducing, rotating, etc. of the figure), you can perform any operation on the figure displayed on the display. In, it is necessary to input two points simultaneously.

FIG. 9 is a view for explaining a conventional multi-point input touch panel.
It is a figure explaining the structure of the touch panel previously filed by Japanese Patent No. 0922 "touch panel structure".

In Japanese Patent Application Laid-Open No. 3-180922, "Touch panel structure", "In a touch panel 30 having a pair of touch detection line groups 12 and 14 extending in two directions,
There is provided another detection line group in which the touch detection lines 16 and 18 passing through the intersection of the touch detection lines 12 and 14 of both groups are extended in directions different from the directions of the two groups. There is.

That is, the touch detection lines in the three directions or the four directions share the intersection, and the touch input is detected by the contact between the touch detection lines. In this touch panel structure, a touch detection line is an essential condition, and all touch detection lines must directly intersect at the sense point.

Although not shown in the figure, the following touch panel structures are known. One of them is Japanese Patent Laid-Open No. 61-2945535 entitled "Tatch Panel Switch". The technique disclosed herein is "a resistor (which has conductive film stripes formed in parallel on the back surface and is formed so as to cross the conductive film stripes and electrically connect to each stripe ( In a touch panel in which two panels having (resistive films) at both ends are installed so that the conductive film stripes of the two panels face each other at a small interval at a right angle, when the surface of the touch panel is pressed,
A large number of stripes formed on one panel come into contact with each other and become electrically conductive. Therefore, at a certain point in time, a constant voltage is applied across one resistor, the voltage (Vx) that appears in the other resistor is measured, and at another point a constant voltage is applied across the other resistor. Then, by measuring the voltage (Vy) appearing on one of the resistors to detect which one of the multiple stripes is in contact with any of the other stripes, the voltage is pressed on the touch panel surface. It is a so-called resistive film type.

In such a touch panel switch, when two different parts on the display screen are pressed at the same time, a voltage close to the arithmetic mean of the voltages generated by the two pressed points is obtained. The film stripe is made of a high resistance material, and it is possible to detect with high accuracy that a plurality of touch points are pressed down, and at that time, the technique of suppressing the measurement is not performed.

Further, in another one, Japanese Patent Laid-Open No. 59-14953.
There is a gazette No. 7 “touch screen”. To summarize the technology disclosed here, the same resistive touch panel as described above attempts to detect the positions of a plurality of touch points by combining the detection of a plurality of touch points in a single direction. , Including the risk of detecting ghost points.

[0012] Another one is "Coordinate input device" disclosed in Japanese Patent Laid-Open No. 6-59798. The technology disclosed herein is also the same resistive film type touch panel as described above, but in summary, the resistive film type touch panel is divided into two areas, and one touch measurement is allowed for each area. ,
It measures two touches in total. Therefore, there is a drawback that the touch position is restricted, and it is not suitable when a touch input at a plurality of arbitrary positions is required.

In addition, in another one, Japanese Patent Laid-Open No. 3-201120
There is a gazette "resistive film type touch panel". The technique disclosed here is also the same resistive film type touch panel as described above, but discloses a simple matrix type.

The matrix type requires strip-shaped independent electrodes for each of the X and Y directions, and since there are many independent electrodes, there is a problem that the wiring becomes complicated. Therefore, in the above-mentioned Japanese Unexamined Patent Publication No. 3-201120 "resistive film type touch panel", one of the two directions is used as a planar common electrode to reduce wiring. As a result,
When the touch points have the same X coordinate (or Y coordinate), the two touch points cannot be distinguished.

In addition to the resistive film type touch panel,
There are an electromagnetic induction method, an ultrasonic method, an optical scanning method, a capacitance detection method, and the like. Electromagnetic induction method, when a current of several tens to several hundred KHz is applied to the coil built into the stylus or cursor,
Since an induced voltage is generated in accordance with the horizontal position of the tablet-side receiving coil and the tablet electrode, the stylus or cursor touch position is calculated from the voltage.

Further, the magnetostriction delay system shown in FIG.
Magnetostrictive vibration waves transmitted from the magnetic shield plate in the X and Y directions are detected by a detection coil incorporated in the input pen, and the magnetostrictive wave from the transmitter of the magnetic shield plate is detected by the coil in the input pen. The detected delay time is calculated to obtain the touch position of the input pen.

In the ultrasonic method, as shown in FIG. 10 (b), the two corners on the surface of the touch panel are
Ultrasonic transducers provided in the X and Y directions (X oscillator,
The ultrasonic wave generated from the (Y oscillator) is used as a surface acoustic wave.
The surface of the touch panel is transmitted, and the surface acoustic waves are spread to every corner of the touch panel through the reflection arrays provided in the X direction and the Y direction. At this time,
A surface acoustic wave passing through the shortest distance a and a surface acoustic wave passing through the longest distance c have a time difference in reaching the ultrasonic receiving elements provided facing each other. Here, for example, when an absorber of surface acoustic wave energy such as a finger touches the touch panel, a part of the surface acoustic waves is absorbed, and the resulting change in the received signal is detected by the microprocessor inside the touch panel interface. The coordinate values are detected by performing a series of analysis.

In the optical scanning method, a light emitting diode array and a light receiving element array are attached to the periphery of a display screen, and the interruption of a light beam that traverses the screen is scanned.
The touch position is detected.

The description of the other systems will be omitted below.

[0020]

Therefore, the resistive film type touch panel described with reference to the above-mentioned publication is, in principle, one-point input, and a sense line obtained by transforming the resistive film system into a matrix type. The method allows input of a plurality of points, but has a problem that the number of electrodes increases.
Further, the electromagnetic induction method, the magnetostriction delay method, and the ultrasonic method described with reference to FIG. In principle, it is a one-point input, and there is a problem that it cannot be used as a touch panel for multi-point input.

Further, in the above-mentioned Japanese Patent Application Laid-Open No. 3-180922 "touch panel structure", which the applicant of the present invention previously filed,
Since a sense line is used, it is a method suitable for inputting a plurality of points in principle. However, in the method disclosed in the above-mentioned JP-A-3-180922 "touch panel structure", the method shown in FIG.
As described above, in the touch panel 10 having the pair of touch detection lines 12 and 14 extending in two directions, the touch detection lines 16 and 18 passing through the intersection of the touch detection lines 12 and 14 of both groups. Is provided with another detection line group that is extended in a direction different from the directions of the two groups. ”As described above, the touch points must intersect at the sense points and must be in contact with each other. However, there is a problem in that high accuracy is required structurally.

In view of the above-mentioned conventional drawbacks, the present invention uses a sense line called a light beam, so that the touch point is a sense point in a touch panel of an optical type or a sense line type, which is not a single point input type in principle. It is an object of the present invention to provide a multi-point input touch panel that does not need to intersect and structurally does not require high precision.

[0023]

1 and 2 are explanatory views of the principle of the present invention. The above-mentioned problems are solved by the touch panel configured as described below.

(1) Parallel sensing lines a, b, c extending in three or more directions, and transmission modules 1a, 1b, 1c provided at one end of each sensing line a, b, c, and other The receiving modules 2a, 2b, 2c are provided at one end, and the receiving module of each sensing line is configured to include means for receiving a signal from the transmitting module and obtaining a touch point.

(2) Parallel sensing lines a, b, c extending in three or more directions, and transmitting modules 1a, 1b, 1c provided at one end of each sensing line a, b, c, and other A means for determining the intersection point Pc of the sensing lines a and b corresponding to at least two receiving modules 2a and 2b, which is provided with the receiving modules 2a, 2b and 2c at one end and receives the signals from the transmitting modules 1a, 1b and 1c And the sensing line c corresponding to the other receiving module 2c and the intersection
A means for obtaining the distance Zr from Pc, and the distance Zr is a predetermined threshold value d
The following point Pc is configured as a touch point.

(3) Parallel sensing lines a, b, c extending in three or more directions, and transmitting modules 1a, 1b, 1c provided at one end of each sensing line a, b, c, and other sensing lines a, b, c The receiving modules 2a, 2b, 2c are provided at one end, and when at most one sensing line in each sensing line detects a touch, at least the intersection of the sensing lines addressed to two directions is obtained, and the obtained plurality of detected lines are detected. When the respective intersections are not separated from each other by a predetermined threshold value d or less, a means for setting the barycentric position of each intersection as a touch point is provided.

(4) Radial sensing lines x, y, z centered at three or more points, and transmitter modules 1x, 1y, z at the center ends of the radial sensing lines x, y, z. 1z is provided, and the radial sensing line x,
The receiving module 2x, 2y, 2z is provided at the other end of y and z, and the receiving module 2a, 2b, 2c of each sensing line receives the signal from the transmitting module 1a, 1b, 1c to obtain the touch point. It is configured to include means.

(5) Radial sensing lines x, y, z centered on three or more points, and transmitter modules 1x, 1y, z at the center ends of the radial sensing lines x, y, z. 1z is provided, and the radial sensing line x,
The receiving modules 2x, 2y, 2z are provided at the other ends of y and z, and at least the sensing lines x, y corresponding to the two receiving modules 2x, 2y that receive the signals from the transmitting modules 1x, 1y, 1z The means for obtaining the intersection point Pc, the sensing line z corresponding to another receiving module 2z, and the intersection point
A means for obtaining the distance Zr from Pc, and the distance Zr is a predetermined threshold value d
The following point Pc is configured as a touch point.

(6) Radial sensing lines x, y, z centered at three or more points, and transmitter modules 1x, 1y, z at the center ends of the radial sensing lines x, y, z. 1z is provided, and the radial sensing line x,
The receiving module 2x, 2y, 2z is provided at the other end of y, z, and when at least one sensing line in each sensing line x, y, z detects a touch, sensing for at least two directions is performed. The intersection points of the lines are obtained, and the obtained plurality of intersection points are mutually determined by a predetermined threshold value d.
When not separated from each other as described below, it is configured to have means for setting the barycentric position of each intersection as a touch point.

(7) Among the detection information obtained from the sensing lines in three or more directions, the intersection calculation process for calculating the coordinates Pc of at least one intersection from the detection information in two directions, and the intersection calculation process. Distance between multiple coordinates Zr, or
The coordinate Pc obtained in the intersection calculation process and a distance calculation process for obtaining the distance Zr between the sensing line in the remaining direction not used for the calculation of the coordinate Pc, and the distance Zr calculated in the distance calculation process. Is set as a touch point which is smaller than a predetermined threshold value d.

[0031]

In the touch panel according to the present invention, as shown in FIGS. 1 (a) and 2, parallel sensing lines a, b, c, ... Or extending in three or more directions.
A plurality of sensing lines, for example, two sensing lines a, b, which are provided with three or more radial sensing lines x, y, z, ...
x, y, specifically all sensing lines a, b to which the receiving module is energized, or the intersection Pc of x, y is determined.

In the example of FIG. 1B, the receiving module is activated at two points for each of the two sensing lines a and b, and the touch is detected. In this example,
Four points, ○ or ●, are candidates for touch points.

Therefore, in the present invention, the intersection point Pc is set for all the sensing lines a and b or other sensing lines c and z different from x and y.
The distance Zr between the
The intersection point Pc with the following sensing lines is used as the touch point. {Refer to FIGS. 1 and 2} Explaining with the example of FIG. 1 (b), the distance Zr between the two energized sensing lines c1 and c2 of the sensing lines c and the intersection point Pc is calculated, The distance Zr is a predetermined threshold value (this threshold value may be set as W / 2 from the distance W between the parallel sensing lines) d
The intersection Pc having the following sensing lines c1 and c2 (in this example, the intersection indicated by ●) is used as a touch point, and the intersection candidates indicated by ○ are deleted.

In the example of FIG. 1 (c), when a touch is detected by at most one sensing line in each of the three sensing lines, the intersection point Pa in each direction is detected.
b, Pbc, Pac are obtained, and when the distance Zr between the three intersections is less than or equal to a predetermined threshold value d, the center of gravity of each intersection is touched.

Therefore, the parallel sensing lines a, b, c, ... Or 3 extending in three directions or more.
It is not necessary that the intersection points of radial sensing lines x, y, z, ... centering on a point or more points are the same,
Simply, parallel sensing lines a, b, c, extending in three directions or more directions, or or radial sensing lines x, y, centered on three or more points.
A touch panel for inputting a plurality of points can be constructed only by providing z ,.

[0036]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 and 2 described above are explanatory views of the principle of the present invention.
3 to 5 are diagrams showing an embodiment of the present invention, FIGS. 3 and 4 show a configuration example of a touch panel having parallel sensing lines, and FIG. 5 is a flow chart of processing for determining a touch point. FIG. 6 is a diagram showing another embodiment of the present invention, showing a configuration example of a touch panel having radial sensing lines, and FIG. 7 is another example of the touch point detection algorithm of the present invention. It is the figure shown typically.

In the present invention, for example, the parallel sensing lines a, extending in three or more directions,
b, c, and the transmitting modules 1a, 1b, 1c at one end of each sensing line a, b, c, and the receiving modules 2a, 2b, 2c at the other end. At least two receiving modules receiving signals
Means for obtaining the intersection point Pc of the sensing lines a, b corresponding to 2a, 2b, means for obtaining the distance Zr between the sensing line c corresponding to another receiving module 2c and the intersection point Pc, and the distance Zr Means for setting a point Pc equal to or less than the threshold value d as a touch point is a means necessary for implementing the present invention.
Note that the same reference numerals indicate the same object throughout the drawings.

Hereinafter, referring to FIGS. 1 and 2, FIGS.
The structure of the touch panel of the present invention and the operation of inputting a plurality of points will be described with reference to FIGS. 6 and 7. First, FIG. 3 and FIG.
Shows a configuration example of a touch panel provided with parallel sensing lines a, b, c extending in three directions or more.

As shown in FIG. 3 (a), the touch panel 3
At 0, as shown in the figure, the light emitting modules 1a and 1b and the light receiving modules 2a and 2b are provided in the vertical direction, and the light emitting module 1c and the light receiving module 2c are provided in the horizontal direction.

The light emitting modules 1a, 1b and 1c are shown in FIG.
Light beam shown in (b) (constituting sensing line)
A, b, and c may emit light at the same time, or may emit light in a time division manner.

In the light receiving modules 2a and 2b, when the light beams are simultaneously emitted, the light beam (sensing line) a or b transmitted by the liquid crystal shutter as shown in FIG. 4 (c). To detect.

When the light emission from the light emitting modules 1a and 1b is performed in a time division manner, the above liquid crystal shutter is not always necessary. FIG. 5 is a flowchart showing a process of detecting a touch point by the touch panel according to the present invention. FIG. 5A shows names of the sensing lines in order to distinguish each sensing line for convenience of description. The example of grant is shown.

That is, for the sensing line a, a
1, a2, a3, ..., For sensing line b, there are b1, b2, b3, ... For sensing line c, For sensing line c, c1, c2, c3, ... There is each line.

First, a sensing line ap (ai, aj, ...), which detects a touch (that is, the light receiving module is activated),
The processing shown in FIG. 5B is performed on bq (bi, bj,-) and cr (ci, cj-).

Sensing line ap (a
The intersection point Pc is obtained for all pairs (ap, bq) of i, aj,-), bq (bi, bj,-). {Processing step 1 of FIG. 5 (b)
00, 101} Next, for all of the remaining sensing lines cr (ci, cj, ~), the intersection Pc and the sensing lines cr (ci, cj,
The distance Zr between
{As described above, when the distance between the sensing lines is W, the above d = W / 2} is determined, and the sensing lines cr (ci, cj, ...) Below the threshold d are determined. Touch the included intersection Pc. {Refer to the processing steps 102, 103, 104 of Fig. 5 (b)} The above processing is performed for all sensing lines cr (ci, cj, ...).
To process. {Refer to processing steps 105 and 103 in FIG. 5} Furthermore, the processing shown in the above processing steps 100 to 105 is performed by the sensing line ap (ai, aj, ...)
Repeat for all sets (ap, bq) of bq (bi, bj,-). {Refer to the processing steps 106 and 101 of FIG. 5B} In this way, the sensing line ap (ai, aj, ...), b in which the touch is detected (that is, the light receiving module is energized)
It is possible to accurately determine a touch point for a plurality of points Pc where q (bi, bj,-) and cr (ci, cj,-) do not intersect.

FIG. 6 is a diagram showing another embodiment of the present invention, showing an example of the construction of an embodiment using radial sense lines centered at three or more points. .
In this embodiment, as shown in FIG. 6A, three points, or
Radial sensing lines x, y, z centered on points further than that, and the radial sensing lines x, y, z
Transmitting modules 1x, 1y, 1z are provided at the center end of z, and receiving modules 2x, 2y, 2z are provided at the other ends of the radial sensing lines x, y, z.

Specifically, as shown in FIG. 6 (b), for example, the light-emitting modules 1x, 1y, 1z, ... Are provided at the four corners of the touch panel 30, respectively. Install light receiving modules 2x, 2y, 2z, ... on the sides.

The light beams emitted radially from the light emitting modules 1x, 1y, 1z, ... Are received by the respective light receiving elements of the light receiving module array, and when there is a touch, a shadow is sensed. At this time, as described above, the light emitting modules 1x, 1y, 1z,
You may or may not emit light from at the same time,
If sequentially and time-divisionally performed, light receiving modules 2x, 2y, 2z, ~
In addition, it is possible to use the existing line sensor without the liquid crystal shutter.

FIG. 6C shows an example in which a light beam is emitted from one light emitting module 1y. In this case, the touch point detection method is the same as the method described in the flow chart of FIG. 5 (b). For example, at least two reception modules that receive signals from the transmission modules 1x, 1y, 1z.
After finding the intersection Pc of the sensing lines x and y corresponding to 2x and 2y, the distance Zr between the sensing line z corresponding to the other receiving module 2z and the above intersection Pc is found, and the distance Zr is a predetermined threshold value d. Since it suffices to use the following point Pc as a touch point, the flow chart of the processing in the radial sensing line method is omitted.

FIG. 7 is a diagram schematically showing another example of the touch point calculation algorithm. In this example, for example, 3
One parallel sensing line a, b, c for each direction a1, b
The case where a touch is detected is shown in 1, c1.

In such a case, the intersection points P of the sensing lines a1 and b1, b1 and c1, c1 and a1, respectively.
When ab, Pbc, and Pca are found, and the three intersecting points thus found are apart from each other by a distance d or less, which is previously set, the center of gravity of the three intersecting points Pab, Pbc, and Pca is set as a touch point. be able to.

In this way, the parallel sensing lines extending in three or more directions, and the transmitting module provided at one end of each sensing line and the receiving module provided at the other end (example of FIG. 1). Or radial sensing lines centered on three or more points,
In the case where the transmitting module is provided at the center end of the radial sensing line and the receiving module is provided at the other end of the radial sensing line (example of FIG. 2), the above-mentioned FIG.
In addition to the touch point calculation algorithm shown in the flowchart of (b), methods such as the touch point calculation algorithm shown in FIG. 7 can be considered.

That is, the basis of the present invention is to provide parallel sensing lines or radial sensing lines in a plurality of directions, and to detect one detected line in each direction.
There is a means for finding a touch point using a book or a plurality of sensing lines.

As described above, the touch panel according to the present invention uses parallel sensing lines extending in three directions or more directions, or radial sensing lines centered at three points or more points. Then, for example, a transmitting module is placed at one end of each sensing line, and a receiving module is placed at the other end. For example, at least the intersection Pc of the sensing lines corresponding to the two receiving modules is obtained, and the other receiving module is set. Find the distance Zr between the corresponding sensing line and the intersection point Pc, and calculate the distance Zr.
The feature is that a point Pc where Zr is equal to or less than a predetermined threshold value d is set as a touch point.

The parallel sensing lines extending in the above three directions or more directions, or the radial sensing lines centered at three points or more, are the light described in the above embodiment. It may be a detection line or a short line on a short plate in a plurality of directions (touching one point on the short line outputs touch information to the receiving module of the short line). It's a mere thing.

[0056]

As described above in detail, according to the present invention, the parallel sensing lines a, b, c, ... or three points extending in three or more directions, or three or more points. Radial sensing line x centered on the point
It is not necessary that the intersections of y, z, and ~ coincide with each other, and the parallel sensing lines a, b, c, ~, or 3 points extending in 3 directions or more directions are centered. By providing the radial sensing lines x, y, z, ..., there is an effect that a touch panel with a plurality of points can be constructed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram (1) of the principle of the present invention.

FIG. 2 is an explanatory diagram of the principle of the present invention (No. 2)

FIG. 3 is a diagram showing an embodiment of the present invention (No. 1).

FIG. 4 is a diagram showing an embodiment of the present invention (part 2).

FIG. 5 is a diagram showing an embodiment of the present invention (part 3).

FIG. 6 is a diagram showing another embodiment of the present invention.

FIG. 7 is a diagram schematically showing another example of the touch point detection algorithm of the present invention.

FIG. 8 is a diagram showing a configuration example of a data processing device.

FIG. 9 is a diagram illustrating a conventional multi-point input touch panel.

FIG. 10 is a diagram showing a structural example of a touch panel.

[Explanation of symbols]

1 Central processing unit (CPU) 2 Main memory unit (MM) 3 Touch panel integrated display device 30 Touch panel 1a, 1b, 1c, ~ Sending module, light emitting module 1x, 1y, 1z, ~ Sending module, light emitting module 2a, 2b, 2c, ~ Receiving module, Receiving module 2x, 2y, 2z, ~ Receiving module, Receiving module 100 ~ 106 Processing step Pc Intersection, Intersection candidate Zr Distance d Threshold a1, a2, ~, b1, b2, ~, c1, c2, ~ Sensing line

Claims (7)

[Claims] 1. A parallel sensing line extending in three directions or more, and a transmitting module provided at one end of each sensing line, and a receiving module provided at the other end. A multi-point input touch panel comprising means for receiving a signal from the transmission module and determining a touch point. 2. A parallel sensing line extending in three or more directions, and a transmitting module provided at one end of each sensing line and a receiving module provided at the other end to receive a signal from the transmitting module. At least 2
Intersection of sensing lines corresponding to one receiving module
A means for obtaining Pc, a means for obtaining a distance Zr between the sensing line corresponding to another receiving module and the intersection point Pc, and a means for making a point Pc at which the distance Zr is a predetermined threshold value d or less as a touch point are provided. A multi-point input touch panel characterized by the following. 3. A parallel sensing line extending in three or more directions, and a transmitting module provided at one end of each sensing line, and a receiving module provided at the other end, and at most one line in each sensing line. When the sensing line of 1 detects a touch, at least an intersection of the sensing lines directed to two directions is obtained, and when the obtained plurality of intersections are not apart from each other by a predetermined threshold value d or less, A multi-point input touch panel, characterized in that it is provided with means for setting the center of gravity of each intersection as a touch point. 4. A radial sensing line centered at three or more points, and a transmitter module provided at the center end of the radial sensing line, and a receiver module at the other end of the radial sensing line. A multi-point input touch panel provided with means for receiving a signal from the transmitting module and determining a touch point in a receiving module of each sensing line. 5. A radial sensing line centered at three or more points, and a transmitter module provided at the center end of the radial sensing line, and a receiving module at the other end of the radial sensing line. Provided to receive the signal from the transmitter module, at least 2
Intersection of sensing lines corresponding to one receiving module
A means for obtaining Pc, a means for obtaining a distance Zr between the sensing line corresponding to another receiving module and the intersection point Pc, and a means for making a point Pc at which the distance Zr is a predetermined threshold value d or less as a touch point are provided. A multi-point input touch panel characterized by the following. 6. A radial sensing line centered at three or more points, and a transmitter module provided at the center end of the radial sensing line, and a receiving module at the other end of the radial sensing line. In each sensing line, when at most one sensing line detects a touch, at least the intersections of the sensing lines directed to two directions are obtained, and the obtained plurality of intersections are mutually predetermined. A multi-point input touch panel comprising means for setting a barycentric position of each intersection as a touch point when the distance is equal to or less than a threshold d and is not separated. 7. Of the detection information obtained from the sensing lines in three or more directions, at least 1 is selected from the detection information in two directions.
An intersection calculation process for calculating the coordinates Pc of one intersection, a distance Zr between a plurality of coordinates obtained in the intersection calculation process, or a coordinate Pc obtained in the intersection calculation process and used for calculation of the coordinates Pc. A distance calculation process for obtaining a distance Zr from a sensing line in the remaining direction that has not been obtained, and a set point at which the distance Zr calculated in the distance calculation process is smaller than a predetermined threshold value d is used as a touch point. Multipoint input touch panel coordinate calculation method.