WO2015173867A1

WO2015173867A1 - Analog touch panel device

Info

Publication number: WO2015173867A1
Application number: PCT/JP2014/062619
Authority: WO
Inventors: 伸哉橋本; 心平桑森
Original assignee: 三菱電機株式会社
Priority date: 2014-05-12
Filing date: 2014-05-12
Publication date: 2015-11-19
Also published as: JP6095854B2; CN106462311B; CN106462311A; JPWO2015173867A1

Abstract

An analog touch panel device is provided with: an input zone detection unit (121) that detects the position of a touched zone; a detected coordinate value acquisition unit (122) that determines a detected coordinate value of a touched coordinate; a pattern determination unit (123) that determines a parallel-cross shaped pattern configured by the touched zone; a computed coordinate value calculation unit (125) that calculates a computed coordinate value which is a coordinate value of a corner portion of two zones that are adjacent in a pair of side directions among a plurality of zones configuring the parallel-cross shaped pattern; a difference calculation unit (126) that calculates a coordinate value difference between the detected coordinate value and the computed coordinate value with respect to the touched zone; a reference coordinate value calculation unit (127) that calculates a reference coordinate value which is the coordinate value of the corner portion of the two zones corresponding to the computed coordinate value when the parallel-cross shaped pattern is not configured, on the basis of a resistance value in each zone when the parallel-cross shaped pattern is not configured and information about the position of a zone configuring the parallel-cross shaped pattern; and a corrected coordinate value calculation unit (128) that calculates a corrected coordinate value obtained by correcting the reference coordinate value on the basis of the coordinate value difference.

Description

Analog touch panel device

The present invention relates to an analog touch panel device.

In recent years, an analog touch panel device is becoming widespread as one of devices for displaying information on information display means such as a liquid crystal monitor and inputting information by pressing a button displayed on the liquid crystal panel with a finger or the like.

In portable information devices using an analog touch panel device, gesture operations on the display screen and multi-touch of multiple touches using a touch panel are possible, and operability is improved by realizing intuitive operations. ing.

Many of such portable information devices achieve the above-described improvement in operability by mounting a capacitive touch panel. However, the capacitive touch panel is expensive and has a disadvantage that it does not react when the touch panel is touched with gloves or the like.

Therefore, instead of the capacitive touch panel, a touch panel that can realize multi-touch by using a resistive film type has appeared. In a touch panel capable of realizing multi-touch, one touch panel is divided into zones (cells) divided in the vertical direction and the horizontal direction. And the coordinate value in a touch panel is acquired by detecting the touch input information on each zone (cell).

Here, a method for acquiring coordinate values on a touch panel using zones (cells) will be described. First, the touch information for each row in the divided zones (cells), that is, information that a touch input operation is performed on the touch panel is acquired. Next, the touch information of each zone (cell) in each row where the touch input operation has been performed is acquired. Subsequently, the AD value information of the coordinates of each zone (cell) where the touch input operation has been performed is acquired. If the AD value information of each zone (cell) where such a touch has been obtained can be acquired, the touch panel processing is correct.

However, if AD value information is acquired for all zones (cells), it takes time from the touch input operation to the touch panel to acquisition of AD value information, and as a result, the response speed becomes slow. Therefore, after detecting a zone (cell) in which a touch input operation has been performed, an AD value is acquired only for that zone (cell), thereby improving response speed.

Then, the validity of the acquired AD value information is verified. Here, it is determined whether or not the obtained AD value is an AD value that should originally exist in the reacted zone (cell). As a result of the determination, if the obtained AD value is not an AD value that should originally exist in the reacted zone (cell), the AD value is regarded as noise, and processing for removing the AD value is performed.

On the other hand, when the obtained AD value is an AD value that should originally exist in the reacted zone (cell), the AD value near the boundary is finally rounded. When a touch input operation is performed in the vicinity of the boundary line between adjacent zones (cells) and the touch input operation crosses the boundary line, two or more zones (cells) react even with a single touch input operation. Two or more values are acquired as values. However, since the actual touch input operation is one point, if the AD values near the boundary line are approximate, rounding is performed to round two or more obtained AD values into one AD value. Thereby, the coordinate value in a touch panel is obtained by making the number of touch points in which the touch input operation is performed and the number of obtained AD values coincide with each other.

As such a touch panel device, for example, in Patent Document 1, a plurality of contact coordinate detection areas are set on the touch panel surface, an input method is assigned to the divided areas, and the divided areas are touched. There is shown a touch panel input device that, when input is performed, calls an algorithm corresponding to an input method assigned to the area from an algorithm storage unit and detects contact coordinates by the algorithm.

Further, for example, Patent Document 2 discloses a touch panel type input display device that can continue operation while correcting input coordinates even when the touch panel input is in an abnormal state. If it is possible, the input coordinates are corrected, and if the coordinates cannot be corrected, a display indicating that the input cannot be continued is shown.

Further, for example, in Patent Document 3, when the distance between one contact point coordinate and another one contact point coordinate is smaller than a predetermined value, the coordinate value of one contact point coordinate and another one contact point coordinate are disclosed. An input device is shown that calculates the coordinate value of a single point coordinate based on the coordinate value of the one and replaces one contact point coordinate and another single contact point coordinate with the single point coordinate.

Japanese Patent Laid-Open No. 11-161425 JP 2010-277119 A JP 2011-145751 A

However, according to the above-described conventional technique, there is a problem that when the cell is a touch input operation having a cross-shaped (rectangular) configuration, a deviation occurs in the obtained AD value, that is, the coordinate value.

The present invention has been made in view of the above, and obtains an analog touch panel device capable of acquiring accurate touch input coordinates when a touch input operation on a screen becomes a cross-shaped (rectangular) shape. With the goal.

In order to solve the above-described problems and achieve the object, an analog touch panel device according to the present invention has a quadrangular outer shape in the surface direction and an equal quadrangular shape in each of two pairs of side directions in the quadrangular shape. The analog touch panel is provided with an analog touch panel divided into a plurality of zones, and the analog touch panel is overlaid so that the electrode terminals are perpendicular to each other on the upper and lower resistance films respectively provided on the end sides facing the pair of electrode terminals, Input zone detection that detects the position of the zone where the touch input operation is performed on the analog touch panel by detecting coordinates by resistance partial pressure due to contact between the upper and lower resistive films when the resistive film surface is pressed by a touch input operation And a detection position for obtaining a detected coordinate value which is a coordinate value of a position where the touch input operation is performed. A value acquisition unit, a pattern determination unit that compares a cross-shaped pattern formed by the plurality of zones subjected to the touch input operation with a predetermined cross-shaped pattern, and a cross-shaped pattern determined by the pattern determination unit Calculated coordinate values that are the coordinate values of the corners of the two zones adjacent in the pair of side directions among the plurality of zones constituting the pattern of each of the zones corresponding to the cross-shaped pattern determined by the pattern determination unit The calculated coordinate value calculation unit that calculates based on the resistance value in the zone and the position information of the zone that forms the cross-shaped pattern determined by the pattern determination unit, and the zone in which the touch input operation has been performed A difference calculation unit that calculates a coordinate value difference between a detected coordinate value and the calculated coordinate value, and the plurality of zones do not form a cross-shaped pattern A reference coordinate value which is a coordinate value of a corner portion of the two zones corresponding to the calculated coordinate value, a resistance value in each zone when the plurality of zones do not form a cross-girder pattern, and the pattern A reference coordinate value calculation unit that is calculated based on the position information of the zones constituting the cross-girder pattern determined by the determination unit; and a corrected coordinate value that is obtained by correcting the reference coordinate value based on the coordinate value difference. A correction coordinate value calculation unit for calculating.

According to the present invention, there is an effect that accurate touch input coordinates can be acquired when the touch input operation on the screen becomes a cross-shaped (rectangular) shape.

FIG. 1 is a plan view showing an external appearance of an analog touch panel of an analog touch panel device according to an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration of the analog touch panel device according to the embodiment of the present invention. FIG. 3 is a flowchart showing the procedure of the coordinate detection process of the analog touch panel device according to the embodiment of the present invention. FIG. 4 is a schematic diagram of a touch panel showing an example of a touch state in which a plurality of touched zones (cells) have a cross-shaped cell configuration. FIG. 5 is a schematic diagram of a touch panel showing an example of a touch state in which a plurality of touched zones (cells) have a cross-shaped cell configuration. FIG. 6 is a schematic diagram of a touch panel showing an example of a touch state in which a plurality of touched zones (cells) have a cross-shaped cell configuration. FIG. 7 is a schematic diagram showing a conductive path configured when one point is touched on an area-divided analog touch panel. FIG. 8 is a schematic diagram showing a conductive path configured when touched so as to form a cross-shaped (rectangular) shape on an area-divided analog touch panel. FIG. 9 is a diagram showing a cross-shaped basic pattern composed of zones (cells) in the present embodiment. FIG. 10 is a diagram showing a cross-shaped basic pattern composed of zones (cells) in the embodiment of the present invention. FIG. 11 is a diagram showing a cross-shaped basic pattern composed of zones (cells) in the embodiment of the present invention. FIG. 12 is a diagram showing a cross-shaped basic pattern constituted by zones (cells) in the embodiment of the present invention. FIG. 13 is a diagram showing a cross-shaped basic pattern constituted by zones (cells) in the embodiment of the present invention. FIG. 14 is a flowchart illustrating a procedure of a correction method of a detected coordinate value (AD value) in the analog touch panel device according to the embodiment of the present invention. FIG. 15 is a schematic diagram showing an arrangement of resistors of the area-divided analog touch panel according to the embodiment of the present invention. FIG. 16 is a schematic diagram showing the arrangement of resistors when the touched zones (cells) form a cross-shaped (rectangular) shape. FIG. 17 is a diagram illustrating an example in which the touched zones (cells) form a cross-shaped (rectangular) shape. FIG. 18 is a diagram illustrating an example in which the touched zone (cell) does not form a cross-shaped (rectangular) shape. FIG. 19 is a schematic diagram illustrating an example in which a correction coordinate value is acquired by further dividing a zone (cell).

Hereinafter, embodiments of an analog touch panel device according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following description, In the range which does not deviate from the summary of this invention, it can change suitably.

Embodiment.
FIG. 1 is a plan view showing an appearance of an analog touch panel (hereinafter referred to as a touch panel) of an analog touch panel device 1 according to an embodiment of the present invention. As shown in FIG. 1, in the analog touch panel device 1, one touch panel having a rectangular shape is arranged in the horizontal direction (X direction and row direction in the figure) and in the vertical direction (Y direction and column direction in the figure). The region is divided at equal intervals by the boundary line 12. It is a region-divided analog touch panel. Thus, the touch panel is divided into a matrix shape into zones (cells) 11 having a quadrangular shape in the surface direction. And the coordinate value in a touch panel is acquired by detecting the touch input information on each zone (cell) 11.

FIG. 2 is a block diagram illustrating a configuration of the analog touch panel device 1 according to the embodiment. 2A shows the overall configuration of the analog touch panel device 1, and FIG. 2B shows the detailed configuration of the touch panel processing unit 120. The analog touch panel device 1 includes an operation panel unit 110, a touch panel processing unit 120, a host processing unit 130, a storage unit 140, and a control unit 150.

The operation panel unit 110 includes a touch panel 111 and a display unit 112, and has functions of an input unit and a display unit. The operation panel unit 110 has a touch panel 111 as an input device disposed on the front surface of the display unit 112. The touch panel 111 is transparent, and the user can input by touching the image displayed on the display unit 112 directly below.

The touch panel 111 is a resistive film type touch panel having a rectangular shape in the surface direction. In general, in a resistive film type touch panel, resistive films respectively provided at end portions where a pair of electrode terminals face each other are overlapped so that the electrode terminals are perpendicular to each other. Then, the coordinates are detected by the resistance partial pressure due to the contact between the upper and lower resistive films when the resistive film surface is pressed by a touch input operation. For example, a supple transparent film is attached to the surface of the glass surface serving as a base via a fine spacer. A transparent electrode grid made of, for example, ITO (Indium Tin Oxide) is provided on the opposing surfaces of the glass and the transparent film. When the transparent film surface is touched, the transparent film is bent by the pressure of the touch and comes into contact with the electrode on the glass surface, and electricity flows. And the pressed position is detected by measuring the partial pressure ratio by the resistance of the transparent electrode on each of the glass surface and the transparent film surface. That is, if a voltage is applied to one of the two opposing resistance films, a voltage corresponding to the operated position is generated on the second sheet. The touch panel 111 outputs this voltage value to the touch panel processing unit 120. The touch panel processing unit 120 can detect the place operated as an analog amount (voltage value) by detecting this voltage division ratio. This voltage value is AD converted to an AD value. In addition, since such a detection method and a detection structure are well-known, detailed description is abbreviate | omitted in this specification.

The display unit 112 can use display means such as an LCD, a plasma display, and an organic EL display.

The touch panel processing unit 120 detects and corrects an input position (input coordinates) by a touch input operation (hereinafter sometimes referred to as touch) on the touch panel 111. The touch panel processing unit 120 includes an input zone detection unit 121, a detected coordinate value acquisition unit 122, a pattern determination unit 123, a resistance value storage unit 124, a calculated coordinate value calculation unit 125, a difference calculation unit 126, and reference coordinates. A value calculation unit 127, a corrected coordinate value calculation unit 128, and a verification unit 129 are included.

The input zone detection unit 121 includes a comparator, determines a touch based on whether the output voltage of the zone (cell) 11 output from the touch panel 111 is higher or lower than the reference voltage, and the position of the zone where the touch input operation is performed. Is detected. That is, by determining whether the output voltage is higher or lower than the reference voltage in both the row of the zone (cell) 11 and the column of the zone (cell) 11, the position of the zone where the touch input operation is performed is detected.

The detected coordinate value acquisition unit 122 obtains a detected coordinate value that is the coordinate value of the position where the touch input operation is performed.

The pattern determination unit 123 retains information on a predetermined cross-girder pattern in which a plurality of zones (cells) 11 form a cross-girder shape, and a cross-shaped pattern formed by the plurality of zones (cells) 11 on which a touch input operation is performed. Is compared with a predetermined cross-beam pattern.

The resistance value storage unit 124 stores the resistance value of each zone when a plurality of zones form a cross-girder pattern for a predetermined plurality of cross-girder patterns.

The calculated coordinate value calculation unit 125 calculates a calculated coordinate value that is a coordinate value of a corner of two zones adjacent in a pair of side directions among a plurality of zones constituting the cross-shaped pattern determined by the pattern determination unit 123. The calculation is based on the resistance value in each zone corresponding to the cross pattern determined by the pattern determination unit and the position information of the zones constituting the cross pattern determined by the pattern determination unit. Here, the corners of two zones adjacent to each other in the pair of side directions form the shortest distance part in the pair of side directions between the zones (cells) 11T constituting the cross beam (rectangle).

The difference calculation unit 126 calculates the coordinate value difference between the detected coordinate value and the calculated coordinate value for the zone (cell) 11 where the touch input operation is performed.

The reference coordinate value calculation unit 127 calculates a reference coordinate value that is a coordinate value of the corners of the two zones corresponding to the calculated coordinate value in the case where the cross-girder pattern is not configured.

The corrected coordinate value calculation unit 128 calculates a corrected coordinate value obtained by correcting the reference coordinate value based on the coordinate value difference.

The verification unit 129 performs AD conversion of the detected coordinate value and the corrected coordinate value to generate an AD value, verifies the validity of the coordinate value (AD value), and rounds the coordinate value (AD value). Further, the verification unit 129 transmits the coordinate value for which the verification of validity and the rounding of the coordinate value (AD value) have been completed to the host processing unit 130. The AD conversion may be performed by a dedicated processing unit.

The host processing unit 130 executes a touch switch function based on the input coordinate value of the zone (cell) 11 in which the touch input operation is performed, which is input from the touch panel processing unit 120.

The storage unit 140 stores various programs and various information necessary for various processes in the analog touch panel device 1.

The control unit 150 controls the entire processing in the analog touch panel device 1.

Next, coordinate detection processing in the analog touch panel device 1 according to the present embodiment will be described. FIG. 3 is a flowchart showing the procedure of the coordinate detection process of the analog touch panel device 1 according to the present embodiment.

First, the input zone detection unit 121 acquires touch information for each row in the zone (cell) 11 divided into regions, that is, information that the touch panel 111 is touched (step S110). Here, the row is the vertical direction in FIG. 1 (Y direction in the figure). Next, the input zone detection unit 121 acquires touch information in each column in each touched row, and detects the touched zone (cell) 11 (step S120).

Next, the detected coordinate value acquisition unit 122 acquires the detected coordinate value (voltage value) of the actually touched position of the touched zone (cell) 11 (step S130). Acquisition of the coordinate value (voltage value) for the touch point is performed in two steps, the X direction and the Y direction. The coordinate value (voltage value) in the X direction is acquired by setting the electrode provided on the left side of a certain row of the touched zone (cell) 11 on the touch panel 111 to a state of 0 V and touching the touched zone (cell). The electrode provided on the right side of a certain row is set to a state of 5V. Then, the electrode provided under the touched zone (cell) 11 is set to a high impedance state, and the electrode is connected to the AD converter. Then, for a position touched by a conduction path set at 0-5 V between both ends in the row direction of the touch panel 111, a voltage value obtained by resistance voltage division at the position is set as a detected coordinate value (voltage value). . The acquisition of the coordinate value (voltage value) in the Y direction is performed in the same manner as the acquisition of the coordinate value (voltage value) in the X direction. Then, the coordinate value (voltage value) is AD converted to acquire the coordinate value (AD value). In addition, since such a detection method and a detection structure are well-known, detailed description is abbreviate | omitted in this specification.

Here, for example, as shown in FIG. 4, a plurality of zones (cells) 11T that are simultaneously touched in the surface direction of the touch panel 111 are touched, and the touched zones (cells) 11T form a cross-shaped (rectangular) shape. May be touched at multiple locations. In this case, an accurate coordinate value (voltage value) cannot be acquired by the following principle, and a coordinate shift occurs in the acquired coordinate value (AD value). FIG. 4 is a schematic diagram of a touch panel showing an example of a touch state in which a plurality of touched zones (cells) 11 have a grid-shaped cell configuration. In FIG. 4, the symbol T indicates the position actually touched.

In FIG. 4, it is necessary to touch four zones (cells) 11 in order for the touched zone (cell) 11T to form a cross-shaped (rectangular) shape. However, as shown in FIG. 5, when two points are touched on the boundary line 12 of the adjacent zones (cells) 11, four zones (cells) are also touched when one point is touched at the intersection of the zone (cell) 11 divided into regions. ) 11 reacts. Also in this case, a cross-shaped (rectangular) touch is established, an accurate coordinate value (voltage value) cannot be acquired, and a coordinate shift occurs in the acquired coordinate value (AD value). FIG. 5 is a schematic diagram of a touch panel showing an example of a touch state in which a plurality of touched zones (cells) 11 have a grid-shaped cell configuration.

In addition, as shown in FIG. 6, the zone (cell) 11G appears to have reacted as a ghost even with a three-point touch, and may form a cross-shaped (rectangular) shape. FIG. 6 is a schematic diagram of a touch panel showing an example of a touch state in which a plurality of touched zones (cells) 11 have a grid-shaped cell configuration.

When the zones (cells) 11 are touched at a plurality of locations so as to form a cross-shaped (rectangular) shape in the surface direction of the touch panel 111, current paths are dispersed in the surface direction of the touch panel, so accurate coordinate values (voltage values) Cannot be obtained. Originally, in the horizontal direction of the touch panel 111 (X direction in the figure), one conductive path is configured to extend along the horizontal direction of the touch panel 111 (X direction in the figure) through the touched position. The In this case, for example, as shown in FIG. 7, when a voltage difference of 5 V is set between the electrode 201 and the electrode 202 provided at both ends of a certain row of the touched zone (cell) 11T, One conductive path L1 is configured. FIG. 7 is a schematic diagram showing a conductive path configured when one point is touched on an area-divided analog touch panel. In FIG. 7, the electrode 201 and the electrode 202 are shown only at the end sides of one row and one column, but in reality, a pair of electrodes are respectively provided at the opposite end portions of all the rows and one column. Electrode terminals are provided so that coordinates can be detected.

However, when the zone (cell) 11 is touched at a plurality of locations so as to form a cross-shaped (rectangular) shape in the surface direction of the touch panel 111, the conduction through the touched position in the X direction, for example, as shown in FIG. Two energization paths of the path L1 and the conductive path L2 are formed, the energization paths are dispersed, and a parallel circuit of the energization paths is formed. FIG. 8 is a schematic diagram showing a conductive path configured when touched so as to form a cross-shaped (rectangular) shape on an area-divided analog touch panel. For this reason, a normal one-point touch and a touch in which the touched zone (cell) 11T forms a cross (rectangular) shape have different voltage values obtained by resistance voltage division even when the same location is touched. . As a result, the acquired voltage value (coordinate value) is deviated from the original correct voltage value (coordinate value), resulting in coordinate deviation.

Further, for example, as shown in FIG. 8, in the case where a voltage difference of 5 V is set between the electrode 203 and the electrode 204 provided at both ends of a certain column of the touched zone (cell) 11T, Similarly, a coordinate shift occurs when acquiring coordinate values (voltage values).

When the zone (cell) 11T touched by the user forms a cross-shaped (rectangular) shape, it hardly occurs in the case of a dynamic touch such as a gesture operation. In the case of a gesture operation, the trajectory of the touched zone (cell) 11T takes a dynamic trajectory. For this reason, even if the touched zone (cell) 11T forms a grid pattern (rectangular shape) for a moment, it can be ignored if the continuity of the coordinate locus of the touched zone (cell) 11T is monitored. It is.

However, when two or more coordinates are required accurately, for example, when two points are pressed such as an interlock, the occurrence of coordinate deviation becomes a very big problem. An operation such as interlock is frequently used, for example, when moving to a maintenance screen in the FA application. Further, in FA applications, there are many situations in which touch operations of two or more points are performed on the touch panel, for example, a crane is operated, without being interlocked.

Therefore, in the present embodiment, the pattern determination unit 123 of the touch panel processing unit 120 determines whether or not the plurality of touched zones (cells) 11 form a grid pattern (step S140). A method for determining whether or not a plurality of touched zones (cells) 11 form a cross-beam shape will be described below.

FIGS. 9 to 13 are diagrams showing a cross-shaped basic pattern constituted by zones (cells) 11 in the present embodiment. The pattern of the zone (cell) 11 shown in FIGS. 9 to 13 is a pattern when there is a possibility that an accurate coordinate value (voltage value) cannot be obtained. 9 to 13, (a) is a schematic diagram showing a state in which a plurality of zones (cells) 11 form a cross-girder shape on the touch panel, and (b) shows a basic pattern of the cross-girder shape shown in (a). The cross-girder configuration data when stored in the storage unit 140 is shown. As the cross-girder configuration data, [start column number], [start row number], [end column number], [end] of the zone (cell) 11 constituting the cross-girder basic pattern when the upper left region is the origin. Line number] is stored. The cross-beam configuration data is stored in advance in the pattern determination unit 123. The cross-girder configuration data may be stored in the storage unit 140.

9 to 13 show an example in which the touch panel is divided into 10 × 7 = 70 regions from the upper left (X0, Y0) to the lower right (X9, Y6) in the plane direction. In the case of the example of FIG. 9, data of x_start: X2 as [start column number], y_start: Y1 as [start row number], x_end: X6 as [end column number], and y_end: Y3 as [end row number]. Are stored as the numbers of the corresponding zones (cells) 11. Also, in FIG. 9 to FIG. 13B, the cross-shaped configuration data of one basic pattern is managed in the format of [identification number] with an identification number attached to [] for each basic pattern.

Fig. 9 shows a basic pattern of one type of girder. In FIG. 10, one type of cross-girder basic pattern different from that in FIG. 9 is shown. In FIG. 11, three types of cross-shaped basic patterns including the basic pattern of FIG. 10 are shown. In FIG. 12, five kinds of cross-shaped basic patterns including the basic patterns of FIGS. 10 and 11 are shown. In FIG. 13, three types of cross-shaped basic patterns including the basic patterns of FIGS. 11 and 12 are shown. The cross-shaped basic patterns are roughly the patterns shown in FIGS. 9 to 13. By changing the interval between the zones (cells) 11 in these patterns, the cross-shaped patterns can be covered.

Therefore, the pattern determination unit 123 of the touch panel processing unit 120 detects the touched zone (cell) 11T pattern information detected in step S120, and all the cross-shaped basic pattern information stored in the pattern determination unit 123. Are compared for each identification number of []. Note that, for example, the pattern shown in FIG. 11 and the pattern shown in FIG. 12 match up to an identification number [2] in the middle, but are finally determined as another cross-shaped (rectangular) pattern. .

Here, when the plurality of touched zones (cells) 11 form a cross-beam shape (step S140, Yes), the detected coordinate value (voltage value) acquired in step S130 is corrected. (Step S150), the process proceeds to Step S160. A method for correcting the detected coordinate value (voltage value) will be described later.

On the other hand, when the plurality of touched zones (cells) 11 do not form a cross beam shape (step S140, No), the detected coordinate value (voltage value) acquired in step S130 is not corrected. The process directly proceeds to step S160.

Next, the verification unit 129 performs AD conversion on the detected coordinate value (voltage value) corrected or not corrected in step S150 (No in step S140), and further verifies the validity of the coordinate value. (Step S160). That is, it is determined whether or not the obtained coordinate value (AD value) is a coordinate value (AD value) that should be originally in the reacted zone (cell).

As a result of the determination, if the obtained coordinate value (AD value) is the coordinate value (AD value) that should be in the reacted zone (cell) (Yes in step S160), the verification unit 129 determines the boundary line 12 Rounding processing is performed on nearby coordinate values (AD values) (step S170). When the vicinity of the boundary line 12 of the adjacent zone (cell) 11 is touched and the touch crosses the boundary line 12, two or more zones (cells) react even with a single touch, so the coordinate value (AD As for (value), two or more values are acquired. However, since the actual touch is one point, if the coordinate value (AD value) near the boundary line 12 is approximate, two or more obtained coordinate values (AD value) are converted into one coordinate value (AD). Rounding to value). Thereby, the number of touch points touched and the number of obtained coordinate values (AD values) are matched to obtain coordinate values (AD values) on the touch panel, and a series of coordinate detection processing is completed.

The coordinate value (AD value) that has been rounded is transmitted to the host processing unit 130. The host processing unit 130 executes a predetermined touch switch function based on the coordinate value (AD value) transmitted from the touch panel processing unit 120.

On the other hand, if the coordinate value (AD value) obtained as a result of the determination is not a coordinate value (AD value) value that should originally exist in the reacted zone (cell) (step S160, No), the AD value is a noise value. Thus, the verification unit 129 performs a process of removing the coordinate value (AD value) (step S180), and the series of coordinate detection processes ends.

Next, a method for correcting the detected coordinate value (AD value) will be described. FIG. 14 is a flowchart showing the procedure of the correction method of the detected coordinate value (voltage value) in the analog touch panel device 1 according to the present embodiment.

The region-divided touch panel can be thought of as a uniform resistive film divided into a grid. Therefore, the resistance value of each zone (cell) 11 has the same resistance value in each zone (cell) 11 in the vertical and horizontal directions, and the touch panel has a set of zones (cells) 11 as shown in FIG. It can be considered a body.

FIG. 15 is a schematic diagram showing an arrangement of resistors of the area-division type touch panel according to the present embodiment. As shown in FIG. 15, the zones (cells) 11 are formed in the same shape in a matrix in the surface direction of the touch panel. For this reason, the resistance value in the horizontal direction (X direction) of each zone (cell) 11 becomes the same fixed value, and the resistance value in the vertical direction (Y direction) becomes the same fixed value. It is stored in the value storage unit 124. Further, this resistance value may be stored in the storage unit 140. FIG. 15 shows the case where the zone (cell) 11 has a rectangular shape, but the same applies to the case where the zone (cell) 11 has a square shape.

Further, even when the resistance value of each zone (cell) 11 is not stored in advance, the resistance value of the touch panel in the resistance value in the horizontal direction (X direction) or the vertical direction (Y direction) and the horizontal direction (X direction) or The resistance value in the horizontal direction (X direction) and the vertical direction (Y direction) of each zone (cell) 11 can be calculated by the number of zones (cells) 11 in the vertical direction (Y direction).

When the touched zone (cell) 11T forms a cross-girder shape (rectangular shape), the resistance arrangement is as shown in FIG. 16, for example. FIG. 16 is a schematic diagram showing the arrangement of resistors when the touched zones (cells) form a cross-shaped (rectangular) shape. For this reason, in the horizontal direction (X direction), as shown in FIG. 8, the current paths between the pressed positions on the touch panel, that is, between the touched zones (cells) 11T are dispersed to form a parallel circuit. As a result, the acquired coordinate value (voltage value) is shifted from the actual value.

Here, in step S120 described above, the touched zone (cell) 11T is detected. FIG. 17 is a schematic diagram showing an example in which the touched zone (cell) 11T forms a cross-shaped (rectangular) shape. For example, in FIG. 17, when the touch position 301, the touch position 302, the touch position 303, and the touch position 304 are actually touched, the zone (cell) 11T where these touch positions are touched is detected. Therefore, it is possible to specify the zone (cell) 11T constituting the cross-girder shape (rectangle), and thereby specify the zone (cell) 11T constituting the cross-girder shape (rectangle) (step S210).

Since the touched zone (cell) 11T can be specified, as shown in FIG. 17, the shortest distance portion between the touched zones (cells) 11T constituting the grid (rectangular shape) is, for example, in the detection coordinate acquisition unit 122 It can be automatically determined by calculation. For example, in FIG. 17, in the horizontal direction (X direction), the corner 311 of the first touch zone (cell) that includes the touch position 301 and the corner 312 of the second touch zone (cell) that includes the touch position 302. The shortest distance is between the two.

Further, when the touched zone (cell) 11T forms a cross-shaped (rectangular) shape, that is, when the conduction path is a parallel circuit as shown in FIG. 16, the corner 311 of the first touch zone (cell). The coordinate value (voltage value) of the corner 312 of the second touch zone (cell) is the resistance value in the horizontal direction (X direction) and the vertical direction (Y direction) of the zone (cell) 11 stored in the storage unit 140. And the information of the position of the touched zone (cell) 11T constituting the cross-girder pattern can be calculated.

That is, the pattern determination unit 123 determines the cross-shaped pattern formed by the plurality of zones (cells) 11 on which the touch input operation has been performed by comparing with a predetermined cross-shaped pattern. Then, the calculated coordinate value calculation unit 125 uses the calculated coordinate values, which are the coordinate values (voltage values) of the corner 311 of the first touch zone (cell) and the corner 312 of the second touch zone (cell), as the pattern determination unit. Based on the resistance value in each zone corresponding to the cross-girder pattern determined in 123 and information on the position of the zone (cell) 11 constituting the cross-girder pattern determined in the pattern determination unit 123. The calculated coordinate value here is not an exact coordinate value (voltage value) but a coordinate value (voltage value) in which a deviation has occurred because the energization path is a parallel circuit. The calculated coordinate value calculation unit 125 calculates the coordinate values (voltage values) of the corner 311 of the first touch zone (cell) and the corner 312 of the second touch zone (cell) of the cross-shaped touch zone (cell) 11T obtained by calculation. ) Is stored in the storage unit 140 as a calculated coordinate value (voltage value) (step S220).

On the other hand, as shown in FIG. 18, when the touched zone (cell) 11T does not form a cross-shaped (rectangular) shape, the corner 311 of the first touch zone (cell) including the touch position 301, and the touch position The coordinate value (voltage value) with the corner 312 of the second touch zone (cell) that includes 302 can be calculated in the same manner. That is, in the case where the touched zone (cell) 11T does not form a cross-shaped (rectangular) shape, the coordinate values of the corner 311 of the first touch zone (cell) and the corner 312 of the second touch zone (cell) ( Also for the voltage value), the resistance value in the horizontal direction (X direction) and the resistance value in the vertical direction (Y direction) of each zone (cell) 11 stored in the storage unit 140, and the cross digit determined by the pattern determination unit 123 It can be calculated based on the position information of the zones (cells) 11 constituting the shape pattern. FIG. 18 is a schematic diagram illustrating an example in which the touched zone (cell) 11T does not form a cross-shaped (rectangular) shape.

The corners 311 and second corners of the first touch zone (cell) corresponding to the calculated coordinate value (voltage value) obtained by calculation when the touched zone (cell) 11T does not form a cross-shaped (rectangular) shape. The coordinate value (voltage value) of the corner 312 of the touch zone (cell) is stored in the storage unit 140 as a reference coordinate value (voltage value) (step S230). Note that this value is obtained when the touched zone (cell) 11T does not actually form a cross-shaped (rectangular) corner 311 of the first touch zone (cell) and the corner 312 of the second touch zone (cell). It becomes the same value as the coordinate value (voltage value) that can be acquired when touching.

Next, the difference calculation unit 126 calculates a coordinate value difference between the calculated coordinate value (voltage value) and the detected coordinate value (voltage value) (step S240). This coordinate value difference then becomes an approximate value for correcting the reference coordinate value (voltage value). The difference calculation unit 126 includes the detected coordinate value (voltage value) acquired at the actual touch position 301 by the cross-shaped (rectangular) touch and the corner 311 coordinate value (voltage value) of the first touch zone (cell). The calculated coordinate value difference (first touch zone difference) is calculated and stored in the storage unit 140. Further, the difference calculation unit 126 detects the detected coordinate value (voltage value) acquired at the actual touch position 302 by the cross-shaped (rectangular) touch, and the corner 312 coordinate value (voltage value) of the second touch zone (cell). The calculated coordinate value difference (second touch zone difference) is calculated and stored in the storage unit 140.

The reference coordinate value (voltage value), which is the coordinate value (voltage value) of the corner portion 311 of the first touch zone (cell) and the corner portion 312 of the second touch zone (cell), calculated in step S230 is In this case, the amount of deviation from the original coordinates is the smallest in the touch zone (cell) 11T constituting the rectangle. For this reason, the larger the value of the coordinate value difference that is the approximate value, the larger the deviation amount in the touch zone (cell) 11T.

Next, the corrected coordinate value calculation unit 128 corrects the reference coordinate value based on the coordinate value difference that is an approximate value, calculates the corrected coordinate value, and stores it in the storage unit 140 (step S250). The reference coordinate value (voltage value), which is the coordinate value (voltage value) of the corner 311 of the first touch zone (cell), is the coordinate value (voltage) of the right end of the first touch zone (cell) 11T including the touch position 301. Value). Starting from this coordinate value (voltage value), the reference coordinate value (voltage value) that is the coordinate value (voltage value) of the corner 311 of the first touch zone (cell) as the value of the first touch zone difference increases. To the left side in the first touch zone (cell) 11T, the correction coordinate value of the touch position 301 is acquired.

Similarly, the reference coordinate value (voltage value) that is the coordinate value (voltage value) of the corner 312 of the second touch zone (cell) is the coordinate of the left end of the second touch zone (cell) 11T that includes the touch position 302. Value (voltage value). Starting from this coordinate value (voltage value), the reference coordinate value (voltage value) that is the coordinate value (voltage value) of the corner 312 of the second touch zone (cell) as the value of the second touch zone difference increases. Is shifted to the left side in the second touch zone (cell) 11T to obtain the correction coordinate value of the touch position 302. And the correction | amendment of the detected coordinate value (voltage value) by the correction method mentioned above is performed with respect to both the vertical direction and a horizontal direction.

Then, by notifying the corrected coordinate value to the host processing unit 130, even when the touched zone (cell) 11T forms a cross-shaped (rectangular) shape, the touch position 301 and the touch position 302 are accurately detected. It becomes possible to acquire a correct coordinate. In addition, by performing the same processing, it is possible to acquire two accurate coordinate values (AD values) of the touch position 303 and the touch position 304.

Further, as an example of a method for obtaining the correction coordinate value, the zone (cell) 11 may be further divided into smaller areas as shown in FIG. FIG. 19 is a schematic diagram illustrating an example of the case where the zone (cell) 11 is further divided to obtain correction coordinate values. For example, a coordinate value difference that is an approximate value in the X direction of the zone (cell) 11 is a range of 0 to m, a range of m to n, a range of n to p, a range of p to q, a range of q to r, etc. Divide into small areas. In this case, it is determined to which small area of the divided zone (cell) 11 the value of the coordinate value difference is assigned. Then, the coordinate value (voltage value) of the determined small area may be used as the corrected coordinate value. That is, when correcting the reference coordinate value (voltage value) based on the coordinate value difference, the corrected coordinate value calculation unit 128 is based on the coordinate value difference in a plurality of small regions into which each zone (cell) 11 is further divided. A small area corresponding to the correction coordinate value is determined. Then, the correction coordinate value calculation unit 128 may assign the coordinates of the small area to the correction coordinate value. FIG. 19 shows a case where the coordinate value difference which is an approximate value is in the range of n to p.

Then, the correction coordinate value can be acquired together with the horizontal coordinate value and the vertical coordinate value by performing the same process as the correction coordinate value acquisition method in the horizontal direction even when acquiring the vertical correction coordinate value. And accurate coordinate values can be obtained.

As described above, in the present embodiment, when a plurality of zones (cells) touched at the same time form a cross-shaped (rectangular), the touch shape of the zone (cell) is a cross-shaped (rectangular). Is recognized by the touch panel processing unit 120. As a result, in order to correct a coordinate shift caused in coordinates acquired due to the touch shape of the zone (cell) forming a cross-shaped (rectangular), the coordinates of the two points forming the cross-shaped (rectangular) , Can output accurate coordinates.

Further, in the present embodiment, when a plurality of zones (cells) touched at the same time form a cross-girder shape (rectangular shape), the touch panel processing indicates that the touch shape of the zone (cell) is a cross-girder shape (rectangular shape). It is recognized by the unit 120. As a result, the coordinate values of the two corrected points are touched in order to correct the coordinate shift that has occurred in the coordinates acquired due to the touch shape of the zone (cell) forming a cross-shaped (rectangular) shape. The value is in the zone (cell).

Further, in the present embodiment, the coordinate shift generated in the coordinates acquired due to the touch shape of the zone (cell) forming a cross-shaped (rectangular) is corrected and output to the host processing unit 120. Can do. This eliminates the need for the host processor 120 to perform a reject process on the acquired input coordinates, thereby preventing unnecessary processes from occurring.

Therefore, according to the present embodiment, even when the touch input operation on the screen becomes a cross-shaped (rectangular), accurate touch coordinates are acquired for the coordinates of the two points that form the cross-shaped (rectangular). There is an effect that it is possible.

As described above, the analog touch panel device according to the present invention is useful when the touch on the screen is shaped like a cross.

1 analog touch panel device, 11 zone (cell), 11T touched zone (cell), 12 border line, 110 operation panel unit, 111 touch panel, 112 display unit, 120 touch panel processing unit, 121 input zone detection unit, 122 detection coordinates Value acquisition unit, 123 Pattern determination unit, 124 Resistance value storage unit, 125 Calculation coordinate value calculation unit, 126 Difference calculation unit, 127 Standard coordinate value calculation unit, 128 Correction coordinate value calculation unit, 129 Verification unit, 130 Host processing unit, 140 storage unit, 150 control unit, 201, 202, 203, 204 electrode, 301, 302, 303, 304 touch position, 311 corner of first touch zone (cell), 312 corner of second touch zone (cell) , L1, L2 conductive path.

Claims

An analog touch panel having a quadrangular outer shape in the surface direction and divided into a plurality of equal quadrangular zones in two pairs of side directions in the quadrangular shape,
In the analog touch panel, the resistance films provided on the end sides where the pair of electrode terminals are opposed to each other are superposed so that the electrode terminals are perpendicular to each other, and the resistance film surface is pressed by a touch input operation. Coordinates are detected by resistance partial pressure due to contact between the upper and lower resistive films,
An input zone detection unit for detecting a position of the zone where a touch input operation is performed on the analog touch panel;
A detected coordinate value acquisition unit for obtaining a detected coordinate value which is a coordinate value of a position where the touch input operation has been performed;
A pattern determination unit that determines a cross-shaped pattern formed by the plurality of zones on which the touch input operation is performed by comparing with a predetermined cross-shaped pattern;
Calculated coordinate values that are the coordinate values of the corners of two zones adjacent in the pair of side directions among a plurality of zones constituting the cross-shaped pattern determined by the pattern determining unit are determined by the pattern determining unit. A calculated coordinate value calculation unit that calculates a resistance value in each zone corresponding to the determined cross-girder pattern, and information on the position of the zone constituting the cross-girder pattern determined by the pattern determination unit;
A difference calculation unit that calculates a coordinate value difference between the detected coordinate value and the calculated coordinate value for the zone in which the touch input operation is performed;
A reference coordinate value that is a coordinate value of a corner portion of the two zones corresponding to the calculated coordinate value when the plurality of zones do not constitute a cross-girder pattern, and the plurality of zones are a cross-girder pattern. A reference coordinate value calculation unit that calculates based on the resistance value in each zone in the case of not configuring, and information on the position of the zone constituting the cross-girder pattern determined by the pattern determination unit,
A corrected coordinate value calculating unit that calculates a corrected coordinate value obtained by correcting the reference coordinate value based on the coordinate value difference;
An analog touch panel device comprising:
Holding the resistance value in each zone in the case where the plurality of zones constitute a cross-shaped pattern in advance for each of the plurality of cross-shaped patterns;
The analog touch panel device according to claim 1.
Holding in advance the resistance value in each of the zones when the plurality of zones do not constitute a cross-girder pattern;
The analog touch panel device according to claim 1 or 2.
When the correction coordinate value calculation unit corrects the reference coordinate value based on the coordinate value difference, the correction coordinate value calculation unit corresponds to the small coordinate corresponding to the correction coordinate based on the coordinate value difference in a plurality of small regions obtained by further dividing each zone. Assign region coordinates,
The analog touch panel device according to any one of claims 1 to 3, wherein: