WO2019151342A1 - Resistive film touch panel device - Google Patents

Resistive film touch panel device Download PDF

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Publication number
WO2019151342A1
WO2019151342A1 PCT/JP2019/003224 JP2019003224W WO2019151342A1 WO 2019151342 A1 WO2019151342 A1 WO 2019151342A1 JP 2019003224 W JP2019003224 W JP 2019003224W WO 2019151342 A1 WO2019151342 A1 WO 2019151342A1
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WIPO (PCT)
Prior art keywords
touch panel
electrode
electrodes
panel device
arc
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PCT/JP2019/003224
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French (fr)
Japanese (ja)
Inventor
山中　剛
康平 薄葉
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Ｎｋｋスイッチズ株式会社
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Publication of WO2019151342A1 publication Critical patent/WO2019151342A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Definitions

  • the present invention relates to a resistive touch panel device. More particularly, the present invention relates to an analog resistive touch panel device that maintains linearity indicating the positional accuracy of touch panel input.
  • the analog resistive film type touch panel device as a conventional technique has a configuration in which a plurality of dot spacers that are insulators are arranged between a rectangular upper electrode and a lower electrode.
  • a flexible transparent conductive film is used for the upper electrode.
  • the upper electrode of this touch panel device is touched with a finger or a touch pen, the upper electrode at the touched position bends, and the upper electrode and the lower electrode come into contact with each other at a portion where the dot spacer does not exist, so that the voltage depends on the voltage value.
  • the coordinates of the touched position are detected.
  • the dot spacers are arranged so that the upper electrode and the lower electrode do not accidentally contact with each other due to external factors such as the environment.
  • Analog type resistive touch panel devices can be classified into four-wire type and five-wire type depending on the method, and among these methods, the 4-wire type is often used.
  • the 4-wire type as shown in FIG. 8B, an X coordinate circuit is formed on the upper electrode side, and a Y coordinate circuit is formed on the lower electrode side. Since the X coordinate circuit and the Y coordinate circuit have different voltage gradients, when the voltage at the touched position is measured, the coordinates of the position are detected. Specifically, when the position A is touched with the voltage Vcc applied between the electrode X1 and the electrode X2 of the X coordinate circuit, the voltage V is generated at the electrode Y1 constituting the lower electrode.
  • the ratio (a: b) between the distance a from the touched position A to the electrode X1 and the distance b from the position A to the electrode X2 is It becomes equal to the ratio (R1: R2) between the value of the resistor R1 and the value of the resistor R2.
  • the voltage value at the touched position A is calculated, and the calculated voltage value is A / D converted.
  • the coordinates of the input position A in the X coordinate circuit are output as digital values.
  • the Y coordinate circuit also outputs the coordinates of the input position A as a digital value on the same principle as the X coordinate circuit.
  • the analog resistive film type touch panel device as a conventional technique is configured to specify the coordinates of the touched position.
  • the relationship between the upper electrode and the lower electrode is a relationship between the vertical axis (Y axis) and the horizontal axis (X axis)
  • the shapes of the upper electrode and the lower electrode constitute the vertical axis and the horizontal axis. It is assumed that the shape is easy to do, that is, a rectangle. For this reason, for example, a product whose design concept is to give the buyer a soft impression by making the shape of the product circular or elliptical, for example, the shape of the touch panel must be rectangular. There were also restrictions on product development.
  • Patent Documents 1 and 2 each propose a method for obtaining a circular touch panel.
  • Patent Document 1 the technique proposed in Patent Document 1 is such that if the upper and lower transparent electrodes are polygonal, a shape close to a circle can be obtained.
  • a polygonal touch panel is used instead of a circle. It is invention of this.
  • a hexagonal active area (usable area) of the input surface of the touch panel is divided by a certain size of ridge, and each of the ridges is representative.
  • a position number is assigned.
  • the representative position number has two representative position coordinates, that is, the position on the X-axis side of the panel and the position on the Y-axis side of the panel. All the position coordinates are determined by the representative position coordinates.
  • a correlation table for obtaining the position coordinates of the press input point must be set in advance, and a controller for controlling the correspondence relationship with the correlation table must be prepared separately.
  • a controller In the technique disclosed in Patent Document 1, a controller must be prepared in accordance with the shape, such as an octagon or a decagon, even if it is polygonal.
  • Patent Document 2 The technique proposed in Patent Document 2 is based on a reference conductive electrode provided opposite to the outer periphery on the surface of the transparent electrode, and a plurality of searches provided in parallel with the reference conductive electrode along the outer peripheral region.
  • the conductive electrodes face each other to form a parallelogram active area (touchable area), and the position coordinates of the input points of the active area are calculated.
  • the reference conductive electrode and the search conductive electrode are both straight lines, there is no active area between the region between the reference conductive electrode and the outer periphery and the region between the search conductive electrode and the outer periphery. A region is formed.
  • Patent Documents 1 and 2 are both methods for obtaining a circular touch panel, but to be precise, it is a method for obtaining a polygonal touch panel device. . Furthermore, when the shape of the touch panel device is circular, the linearity indicating the positional accuracy of the touch panel input must be maintained. However, Patent Documents 1 and 2 also describe a technique for maintaining linearity. There is no suggestion.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a circular or substantially circular analog resistive film type touch panel device that maintains linearity.
  • a resistive film type touch panel device includes: The upper electrode part having a circular or substantially circular upper conductive film in which the X coordinate circuit is formed and the lower electrode part having a circular or substantially circular lower conductive film in which the Y coordinate circuit is formed are arranged to face each other.
  • an analog type resistive touch panel device The X coordinate circuit and the Y coordinate circuit each include a pair of electrodes having at least one arc-shaped electrode. It is characterized by that.
  • the upper conductive film and the lower conductive film are circular or substantially circular in shape, and the X coordinate circuit and the Y coordinate circuit each include a pair of electrodes having at least one arc-shaped electrode. Therefore, the linearity of the circular or substantially circular analog resistive film type touch panel device can be maintained.
  • a straight line connecting the center of the arc-shaped electrode of the X coordinate circuit including a pair of electrodes and the center of the upper conductive film, and the center and the lower portion of the arc-shaped electrode of the Y coordinate circuit Since the straight line connecting the center of the conductive film is orthogonal, a coordinate axis for specifying the touched position is suitably formed. As a result, it is possible to provide a circular or substantially circular analog resistive film type touch panel device with more maintained linearity.
  • a center angle of the arc-shaped electrode is 90 degrees to 170 degrees.
  • the central angle of the arc-shaped electrode is 90 ° to 170 °, a circular or substantially circular analog resistive film type touch panel device corresponding to the required level of linearity is provided. Can be provided.
  • the value indicating linearity obtained by the percentage of the maximum knitting position and the maximum voltage from the theoretical output voltage line is ⁇ 1.5%. According to the present invention, since the value indicating linearity is ⁇ 1.5%, it is possible to provide a circular or substantially circular analog resistive film type touch panel device that further maintains linearity.
  • both of the pair of electrodes are the arc-shaped electrodes. According to this invention, since both of the pair of electrodes are arc-shaped electrodes, the linearity of the voltage distribution between the opposing electrodes can be maintained at a higher level.
  • a part of the outer edge of the upper electrode part and the outer edge of the lower electrode part are joined by a foldable joint part, and by bending the joint part, It is preferable that the upper electrode portion and the lower electrode portion are arranged so as to overlap and face each other. According to the present invention, the upper electrode portion and the lower electrode portion can be easily overlapped and integrated.
  • FIG. 2A It is a top view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2A. It is a perspective view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2A. It is a top view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2B. It is a perspective view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2B.
  • FIG. 2C It is a top view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2C. It is a perspective view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2C.
  • FIG. 2A It is a figure which shows the example which drew the character and the figure using the resistive film type touch panel apparatus of FIG. 2A. It is a figure which shows the example which drew the character and the figure using the resistive film type touch panel apparatus of FIG. 2B. It is a figure which shows the example which drew the character and the figure using the resistive film type touch panel apparatus of FIG. 2C.
  • a resistive touch panel device 1 according to an embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment.
  • FIG. 1A and 1B are external views of the resistive touch panel device 1.
  • FIG. 1A is a plan view of the resistive touch panel device 1
  • FIG. 1B is a cross-sectional view of the resistive touch panel device 1.
  • the resistive film type touch panel device 1 is an analog type resistive film type touch panel device in which a circular or substantially circular upper electrode part 11 and a lower electrode part 21 are arranged to face each other.
  • the upper electrode portion 11 includes a circular or substantially circular upper electrode plate 101, and a circular or substantially circular upper conductive film 102 on which an X coordinate circuit 100 including a pair of electrodes (electrodes 111 and 112) is formed.
  • the lower electrode unit 21 includes at least a circular or substantially circular lower electrode plate 201, and a circular or substantially circular lower conductive film 202 on which a Y coordinate circuit 200 including a pair of electrodes (electrodes 211 and 212) is formed. , And dot spacers 203.
  • the X coordinate circuit 100 and the Y coordinate circuit 200 each include at least one arc-shaped electrode.
  • the upper electrode portion 11 at the touched position is deflected, and the dot spacer 203 is Since the upper electrode portion 11 and the lower electrode portion 21 are in contact with each other and conduct in a portion that does not exist, the coordinates of the touched position can be detected based on the voltage value.
  • the upper electrode portion 11 includes at least a circular or substantially circular upper electrode plate 101 and a circular or substantially circular upper conductive film 102 on which an X coordinate circuit 100 including a pair of electrodes (electrodes 111 and 112) is formed. .
  • “at least” means that other components may be included.
  • the upper electrode portion 11 may include a circular or substantially circular hard coat (not shown) for protecting the surface of the upper electrode plate 101 from scratches and dirt.
  • the upper electrode plate 101 is a circular or substantially circular electrode plate disposed above the upper electrode portion 11.
  • the upper electrode plate 101 is made of a transparent material that bends when touched with a finger or a touch pen.
  • a material such as a PET (polyethylene terephthalate) film or thin glass can be used as the upper electrode plate 101.
  • the upper surface of the upper electrode plate 101 may be subjected to a process of attaching a hard coat (not shown) for protecting the surface of the upper electrode plate 101 from scratches and dirt.
  • the upper conductive film 102 is a circular or substantially circular conductive film disposed below the upper electrode plate 101 so as to face a lower conductive film 202 described later.
  • an X coordinate circuit 100 including a pair of arc-shaped electrodes (electrode 111 and electrode 112) is formed on the surface of the upper conductive film 102.
  • the upper conductive film 102 has a uniform resistance value, but the specific resistance value is not particularly limited. For example, a resistance value of about 300 ⁇ / ⁇ to 500 ⁇ / ⁇ can be used.
  • the material of the upper conductive film 102 is not particularly limited. A film obtained by depositing ITO (Indium Tin Oxide) or a metal material such as silver (printing) on a transparent film can be used.
  • the lower electrode unit 21 includes a circular or substantially circular lower electrode plate 201, and a lower conductive film 202 on which a Y coordinate circuit 200 including a pair of electrodes (electrodes 211 and 212) is formed. And dot spacers 203 at least. Note that “at least” means that other components may be included.
  • the lower electrode portion 21 may include a retardation plate (not shown) for reducing light reflection.
  • the lower electrode plate 201 is a circular or substantially circular electrode plate disposed below the lower electrode portion 21.
  • the material of the lower electrode plate 201 is not particularly limited. For example, soda glass (soda lime glass, soda lime glass), a plastic plate, a film, or the like can be used.
  • the lower conductive film 202 is a conductive film disposed on the lower electrode plate 201 so as to face the upper conductive film 102 with the dot spacer 203 interposed therebetween. On the surface of the lower conductive film 202, a Y coordinate circuit 200 including a pair of electrodes (electrodes 211 and 212) is formed.
  • the lower conductive film 202 has a uniform resistance value, but the specific resistance value is not particularly limited. For example, a resistance value of about 300 ⁇ / ⁇ to 500 ⁇ / ⁇ can be used.
  • the material of the lower conductive film 202 is not particularly limited.
  • the transparent film may be a film obtained by depositing ITO (Indium Tin Oxide) or a metal material such as silver applied (printed).
  • the dot spacer 203 is an insulator formed between the upper conductive film 102 and the lower conductive film 202, and when the touch operation on the resistive touch panel device 1 is not performed, the upper conductive film 102 and the lower conductive film 202. Prevent accidental contact with. Specifically, the dot spacer 203 is formed on the surface of the lower conductive film 202 by a technique such as printing. Thereby, it is possible to prevent the upper conductive film 102 and the lower conductive film 202 from being short-circuited due to external factors such as the environment.
  • the upper electrode plate 101 is circular or substantially circular, and the surface of the upper conductive film 102 includes a pair of arc-shaped electrodes (electrode 111 and electrode 112).
  • a coordinate circuit 100 is formed.
  • the lower electrode plate 201 is circular or substantially circular, and a Y coordinate circuit 100 including a pair of arc-shaped electrodes (electrodes 211 and 212) on the surface of the lower conductive film 202. Is formed. Since the upper electrode portion 11 and the lower electrode portion 21 have the above-described configuration, it is possible to provide a circular or substantially circular analog resistive film type touch panel device that maintains linearity.
  • linearity means linearity and is a concept indicating the positional accuracy of the input of the resistive touch panel device 1. That is, since the input position accuracy of the resistive touch panel device 1 depends on the uniformity of the upper conductive film 102 and the lower conductive film 202, for example, the maximum knitting position and the maximum voltage from the theoretical output voltage straight line Whether or not linearity is maintained is determined based on the value obtained as a percentage. Other examples of specific shapes of the electrodes 111 and 112 will be described later with reference to FIGS. 2A to 2C.
  • FIGS. 3A and B to FIGS. 5A and 5B are voltage mappings showing linearity for the specific examples and comparative examples of FIGS. 2A to C, respectively.
  • the voltage mapping is a graph that is displayed superimposed on the shape of the resistive touch panel device 1, and is divided according to color, color, etc. so that portions of the same voltage form the same layer. Is a graph displayed.
  • the boundary line of the layer is displayed in a straight line or a shape close to a straight line.
  • the voltage mapping shown in FIGS. 3A and 3 to FIGS. 5A and 5B shows only the voltage distribution of the upper electrode portion 11 for convenience of explanation.
  • the voltage mapping of the lower electrode portion 21 is omitted because the voltage mapping of the upper electrode portion 11 is rotated 90 degrees.
  • the resistive touch panel device 1 can be opened to the upper electrode part 11 and the lower electrode part 21 with the joint part 31 between the outer edge of the upper electrode part 11 and the outer edge of the lower electrode part 21 as a fulcrum.
  • the resistive electrode type touch panel device 1 is formed by integrating the upper electrode portion 11 and the lower electrode portion 21 that are opened in two by folding and joining them with the joint portion 31 as a fulcrum. Can do.
  • FIGS. 2A to 2C and FIGS. 7A to 7D are diagrams showing a state in which the resistive touch panel device 1 is opened to the upper electrode portion 11 and the lower electrode portion 21 with the joint portion 31 as a fulcrum. Yes.
  • the voltage mapping shown in FIGS. 3A and B to FIGS. 5A and 5B shows the results measured by the following potential measurement method. That is, a voltage of 5 V (volt) is applied to one electrode (for example, electrode 111) of the pair of electrodes of each of the upper electrode portion 11 and the lower electrode portion 21, and the other electrode (for example, electrode 112) is applied. The voltage was measured using a multimeter (circuit meter) as GND (ground). The resistance value distribution of the entire resistive film touch panel device 1 was read out by measuring the potential of the point at a plurality of locations.
  • the GND side of the multimeter is connected to the GND of the electrode, the voltage measurement side probe of the multimeter and the upper electrode unit 11 are connected, and the measurement location (point to be measured) is touched with a finger.
  • the voltage was measured.
  • the number of measurement locations was 400.
  • FIG. 2A is a diagram illustrating a case where all the electrodes are formed of dots.
  • the electrode 111 and the electrode 112 of the upper electrode part 11 and the electrode 211 and the electrode 212 of the lower electrode part 21 are all constituted by point-like electrodes.
  • the electrodes 111 and 112 are disposed at the upper and lower ends of the upper electrode portion 11 or in the vicinity thereof, and the electrodes 211 and 212 are disposed at the left and right ends of the lower electrode portion 21 or in the vicinity thereof.
  • Electrodes 111, 112, 211, and 212 are bent even when the lower electrode portion 21 is bent with the joint portion 31 as a fulcrum, and the upper electrode portion 11 and the lower electrode portion 21 are overlapped. They are arranged so that they do not overlap. In this way, when the four electrodes are all composed of dots, as shown in the voltage mapping of FIGS. 3A and 3B, the range is about one third of the whole centered on the electrodes. The voltage is distributed in an arc shape, and the voltage distribution is not maintained with linearity. On the other hand, on the side of the arc-shaped electrodes (electrodes 112 and 212), the voltage distribution is far more linear than the point-shaped electrode side. Further, in the vicinity of an intermediate point between the point-like electrode and the arc-like electrode, the voltage distribution is maintained with linearity as compared with the vicinity of the electrode.
  • FIG. 2B is a diagram illustrating a case where the electrode is configured by an arc shape and a dot shape.
  • the electrode 111 is an arc-shaped electrode and the electrode 112 is a dot-shaped electrode.
  • the electrode 111 is an arc-shaped electrode having a central angle of 90 degrees, and is arranged along the curved shape of the edge of the upper electrode portion 11 at or near the lower end portion of the upper electrode portion 11 in the opened state. ing.
  • the electrode 112 is disposed at or near the upper end of the opened upper electrode part 11.
  • the electrode 211 is a dot electrode
  • the electrode 212 is an arc-shaped electrode.
  • the electrode 211 is disposed at the left end portion of the lower electrode portion 21 or in the vicinity thereof.
  • the electrode 212 is an arc-shaped electrode having a central angle of 90 degrees, and is arranged along the curved shape of the edge of the lower electrode portion 21 at or near the right end portion of the lower electrode portion 21. Even if these four electrodes (electrodes 111, 112, 211, and 212) are bent with the joint 31 as a fulcrum and the upper electrode portion 11 and the lower electrode portion 21 are overlapped, the electrodes do not overlap each other. Is arranged.
  • the central angle is an angle formed by two radii connecting both ends of the arc-shaped electrode and the center of the circular or substantially circular conductive film.
  • the point electrodes (electrodes 112 and 211) are formed.
  • the voltage is distributed in an arc shape in the range of about one third of the whole centering on the point-like electrode. Further, in the vicinity of the intermediate point between the electrodes, the voltage distribution is far more linear than the vicinity of the electrodes.
  • FIG. 2C is a diagram illustrating a case where all the electrodes are formed in an arc shape. That is, FIG. 2C shows the shape of the electrode of the resistive touch panel device 1 shown in FIG. 1A. As shown in FIG. 2C, the electrode 111 and the electrode 112 of the upper electrode portion 11 are both arc-shaped electrodes having a central angle of 90 degrees, and the upper electrode portion is located at or near the upper and lower ends of the upper electrode portion 11. 11 are arranged so as to follow the curved shape of the elbow.
  • Each of the electrodes 211 and 212 of the lower electrode portion 21 is an arc-shaped electrode having a central angle of 90 degrees, and the edge of the lower electrode portion 21 is formed at or near the left and right ends of the lower electrode portion 21. Each is arranged along a curved shape.
  • the resistive touch panel device 1 is formed by the upper electrode portion 11 and the lower electrode portion 21 being folded with the joint portion 31 as a fulcrum and overlapping.
  • these four arc-shaped electrodes are all arc-shaped electrodes having a central angle of 90 degrees, the electrodes do not have a portion where they overlap each other. And it arrange
  • the upper electrode portion 11 and the lower electrode portion 21 include arc-shaped electrodes, the effect of maintaining linearity is achieved.
  • the voltage distribution has a high linearity as a whole. That is, when the linearity is obtained in the voltage distribution with a pair of electrodes facing each other with respect to a circular or substantially circular surface resistance, it is preferable to provide an arc-shaped electrode near the outer periphery of the circular surface. It is. Thereby, linearity can be given to the voltage distribution between the electrodes which oppose.
  • the resistive touch panel device 1 maintains linearity in which the percentage between the maximum knitting position and the maximum voltage from the theoretical output voltage straight line equivalent to that of the known rectangular resistive touch panel device is ⁇ 1.5%.
  • a known rectangular analog touch panel control board not shown
  • characters can be obtained in the same manner as the known rectangular analog touch panel. It is possible to detect the down position of the drawing. In other words, since it is circular or substantially circular, it is not necessary to prepare a dedicated control board, and development costs can be reduced.
  • FIGS. 6A to 6C show comparative examples in the case where characters (characters “Yamanaka” in alphabets) and figures (“ ⁇ ” and “ ⁇ ”) are drawn using the resistive touch panel device 1.
  • FIG. FIG. 6A shows an example in which all of the electrodes are constituted by point-like electrodes
  • FIG. 6B shows an example in which the electrodes are constituted by dot-like electrodes and arc-shaped electrodes
  • FIG. 6C shows that all of the electrodes are circular. The example in the case of being comprised by the arc-shaped electrode is shown.
  • the letters (alphabet letters) are displayed in a bent shape, and the figure “ ⁇ ”is also displayed as a figure“ ⁇ ”.
  • the electrode is composed of a dot-like electrode and an arc-like electrode
  • the letters (alphabet) are displayed in a curved shape, and a part of the figure “ ⁇ ” is a figure “ ⁇ ”.
  • it was displayed it was displayed, it was displayed in the shape of “ ⁇ ” on the arc-shaped electrode side.
  • all of the electrodes are composed of arcuate electrodes, they are displayed as input as shown in FIG. 6C.
  • the linearity is particularly maintained, so that the content input to the resistive touch panel device 1 can be suitably displayed.
  • the four electrodes of the resistive touch panel device 1 according to the present embodiment are all arc-shaped electrodes having a central angle of 90 degrees. Thereby, when the upper electrode part 11 and the lower electrode part 21 are overlapped, the four electrodes do not overlap all at all, and are neatly arranged in an annular shape without a gap.
  • the central angle of the arc-shaped electrode is not limited to 90 degrees, and can be configured with various central angles as shown in FIGS. 7A to 7D.
  • FIGS. 7A to 7D are diagrams illustrating an example in which the electrode shape of the resistive touch panel device 1 is only an arc shape
  • FIG. 7A is a diagram illustrating a case where the center angle of the arc electrode is 90 degrees
  • 7B is a diagram showing a case where the center angle of the arc-shaped electrode is 120 degrees
  • FIG. 7C is a diagram showing a case where the center angle of the arc-shaped electrode is 150 degrees
  • FIG. 7D is a center angle of the arc-shaped electrode. It is a figure which shows the case where is 170 degree
  • the size of the central angle of the arc-shaped electrode is 90 to 170 degrees, but the size of the central angle of the arc-shaped electrode is not limited to this range.
  • the central angle may be less than 90 degrees or greater than 170 degrees.
  • the resistive touch panel device to which the present invention is applied only needs to have the following configuration, and can take various embodiments. That is, the resistive touch panel device to which the present invention is applied (for example, the resistive touch panel device 1 in FIGS. 1A and 1B)
  • An upper electrode portion for example, the upper electrode portion in FIGS. 1A and 1B having a circular or substantially circular upper conductive film (for example, the upper conductive film 102 in FIG. 1B) on which an X coordinate circuit (for example, the X coordinate circuit 100 in FIG. 1B) is formed. 11
  • a lower electrode portion for example, FIGS. 1A and B having a circular or substantially circular lower conductive film (for example, the lower conductive film 202 of FIG.
  • the X coordinate circuit 100 and the Y coordinate circuit 200 include a pair of electrodes (for example, the electrodes 111 and 112 and the electrodes 211 and 212 in FIG. 1A) each having at least one arc-shaped electrode.
  • the upper conductive film 102 and the lower conductive film 202 are circular or substantially circular in shape
  • the X coordinate circuit 100 and the Y coordinate circuit 200 include arc-shaped electrodes 111 and 112 and electrodes 211 and 212. Since each of them is included, it is possible to provide a circular or substantially circular analog resistive film type touch panel device in which linearity is maintained.
  • the coordinate axis is formed by the X coordinate circuit 100 and the Y coordinate circuit 200 being orthogonal to each other.
  • the coordinate axis is formed by the X coordinate circuit 100 and the Y coordinate circuit 200 being orthogonal to each other, it is possible to provide a circular or substantially circular analog resistive film type touch panel device with further maintained linearity. .
  • a center angle of the arc-shaped electrode is 90 degrees to 170 degrees.
  • the center angle of the arc-shaped electrode is 90 ° to 170 °, it is possible to provide a circular or substantially circular analog resistive film type touch panel device according to the required linearity. .
  • a value indicating linearity which is obtained by a percentage between the maximum knitting position and the maximum voltage from the theoretical output voltage line, is ⁇ 1.5%.
  • a part of the outer edge of the upper electrode part and the outer edge of the lower electrode part are joined by a bendable joint part (for example, the joint part 31 in FIGS. 2A to 2C). It is preferable that the upper electrode portion and the lower electrode portion are arranged so as to overlap and face each other by bending the joint portion. Thereby, the upper electrode part and the lower electrode part can be easily overlapped and integrated.

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Abstract

The present invention addresses the problem of providing a circular or substantially circular analog-type resistive film touch panel device wherein linearity is maintained. The problem is solved by an analog-type resistive film touch panel device 1 in which an upper electrode part 11, which has a circular or substantially circular upper conductive film 102 on which an X-coordinate circuit 100 is formed, and a lower electrode part 21, which has a circular or substantially circular lower conductive film 202 on which a Y-coordinate circuit 200 is formed, are arranged so as to oppose one another. Pairs of electrodes (electrodes 111 and 112, electrodes 211 and 212) having at least one arc-shaped electrode are included respectively in the X-coordinate circuit 100 and the Y-coordinate circuit 200.

Description

抵抗膜式タッチパネル装置Resistive touch panel device
　本発明は、抵抗膜式タッチパネル装置に関する。さらに詳しくは、タッチパネルの入力の位置精度を示すリニアリティが保たれた、アナログ方式の抵抗膜式タッチパネル装置に関する。 The present invention relates to a resistive touch panel device. More particularly, the present invention relates to an analog resistive touch panel device that maintains linearity indicating the positional accuracy of touch panel input.
　従来より、アナログ方式の抵抗膜式タッチパネル装置は存在する。従来技術としてのアナログ方式の抵抗膜式タッチパネル装置は、図８Ａに示すように、矩形の上部電極と下部電極との間に、絶縁体であるドットスペーサが複数配置された構成を有しており、上部電極には、可撓性を有する透明な導電膜が用いられている。このタッチパネル装置の上部電極を指やタッチペン等でタッチすると、タッチされた位置の上部電極がたわみ、ドットスペーサが存在しない部分で上部電極と下部電極とが接触して導電するので、その電圧値によって、タッチされた位置の座標が検出される。なお、ドットスペーサは、環境などの外的な要因によって上部電極と下部電極とが誤って接触しないように配置されるものである。 Conventionally, there are analog type resistive touch panel devices. As shown in FIG. 8A, the analog resistive film type touch panel device as a conventional technique has a configuration in which a plurality of dot spacers that are insulators are arranged between a rectangular upper electrode and a lower electrode. For the upper electrode, a flexible transparent conductive film is used. When the upper electrode of this touch panel device is touched with a finger or a touch pen, the upper electrode at the touched position bends, and the upper electrode and the lower electrode come into contact with each other at a portion where the dot spacer does not exist, so that the voltage depends on the voltage value. The coordinates of the touched position are detected. The dot spacers are arranged so that the upper electrode and the lower electrode do not accidentally contact with each other due to external factors such as the environment.
　アナログ方式の抵抗膜式タッチパネル装置は、方式の違いによって４線式や５線式などの方式に分類することが可能であり、これらの方式のうち４線式が多く利用されている。４線式のものは、図８Ｂに示すように、上部電極側にＸ座標回路が形成され、下部電極側にＹ座標回路が形成されている。このＸ座標回路及びＹ座標回路は、それぞれ異なった電圧勾配をもっているので、タッチされた位置の電圧が計測されると、その位置の座標が検出される。具体的には、Ｘ座標回路の電極Ｘ１と電極Ｘ２との間に、電圧Ｖｃｃが印加された状態で、位置Ａがタッチされると、下部電極を構成する電極Ｙ１に電圧Ｖが発生する。このとき、透明導電膜は均一な抵抗値を持っているので、タッチされた位置Ａから電極Ｘ１までの距離ａと、位置Ａから電極Ｘ２までの距離ｂとの比（ａ：ｂ）は、抵抗Ｒ１の値と、抵抗Ｒ２の値との比（Ｒ１：Ｒ２）に等しくなる。このような原理によって、タッチされた位置Ａの電圧値が算出されるとともに、算出された電圧値がＡ／Ｄ変換される。その結果、Ｘ座標回路における入力位置Ａの座標がデジタル値で出力される。Ｙ座標回路もＸ座標回路と同様の原理で、入力位置Ａの座標がデジタル値で出力される。 Analog type resistive touch panel devices can be classified into four-wire type and five-wire type depending on the method, and among these methods, the 4-wire type is often used. In the 4-wire type, as shown in FIG. 8B, an X coordinate circuit is formed on the upper electrode side, and a Y coordinate circuit is formed on the lower electrode side. Since the X coordinate circuit and the Y coordinate circuit have different voltage gradients, when the voltage at the touched position is measured, the coordinates of the position are detected. Specifically, when the position A is touched with the voltage Vcc applied between the electrode X1 and the electrode X2 of the X coordinate circuit, the voltage V is generated at the electrode Y1 constituting the lower electrode. At this time, since the transparent conductive film has a uniform resistance value, the ratio (a: b) between the distance a from the touched position A to the electrode X1 and the distance b from the position A to the electrode X2 is It becomes equal to the ratio (R1: R2) between the value of the resistor R1 and the value of the resistor R2. Based on such a principle, the voltage value at the touched position A is calculated, and the calculated voltage value is A / D converted. As a result, the coordinates of the input position A in the X coordinate circuit are output as digital values. The Y coordinate circuit also outputs the coordinates of the input position A as a digital value on the same principle as the X coordinate circuit.
　このように、従来技術としてのアナログ方式の抵抗膜式タッチパネル装置は、タッチされた位置の座標を特定する構成となっている。このため、上部電極と下部電極との関係は、縦軸（Ｙ軸）と横軸（Ｘ軸）との関係になるので、上部電極及び下部電極の形状は、縦軸と横軸とを構成し易い形状、すなわち矩形を前提としたものとなる。このような事情から、例えば製品の形状を円形や楕円形にすることで購入者に柔らかな印象を与えることをデザインコンセプトとした製品であっても、タッチパネル部分の形状のみ矩形にせざるを得ないといったような、製品開発上の制約も生じていた。 Thus, the analog resistive film type touch panel device as a conventional technique is configured to specify the coordinates of the touched position. For this reason, since the relationship between the upper electrode and the lower electrode is a relationship between the vertical axis (Y axis) and the horizontal axis (X axis), the shapes of the upper electrode and the lower electrode constitute the vertical axis and the horizontal axis. It is assumed that the shape is easy to do, that is, a rectangle. For this reason, for example, a product whose design concept is to give the buyer a soft impression by making the shape of the product circular or elliptical, for example, the shape of the touch panel must be rectangular. There were also restrictions on product development.
　このような問題に対し、特許文献１及び２では、円形のタッチパネルを得るための手法がそれぞれ提案されている。 For such problems, Patent Documents 1 and 2 each propose a method for obtaining a circular touch panel.
特開２００５－１２８８１９号公報Japanese Patent Laid-Open No. 2005-128819 特開２００５－１８２３３９号公報JP 2005-182339 A
　しかしながら、特許文献１で提案されている手法は、上下の透明電極を多角形状にすれば円形に近い形状が得られる、とするものであり、正確にいえば、円形ではなく多角形状のタッチパネルについての発明である。さらに、特許文献１で提案されている手法では、タッチパネルの入力面のうち、６角形のアクティブエリア（使用可能領域）が、特定の大きさの枡で区分けされ、その１つ１つの枡に代表位置番号が付けられる。代表位置番号は、パネルのＸ軸側の位置と、パネルのＹ軸側の位置の２つの代表する位置座標とを持っており、全ての位置座標はその代表する位置座標でもって位置が決定される。このため、押圧入力点の位置座標を求めるための相関テーブルが予め設定されていなければならず、また、相関テーブルとの対応関係を制御するためのコントローラを別途用意する必要がある。また、特許文献１の技術では、多角形状であっても、例えば８角形や１０角形のように形状に応じてコントローラを用意しなければならない。 However, the technique proposed in Patent Document 1 is such that if the upper and lower transparent electrodes are polygonal, a shape close to a circle can be obtained. To be precise, a polygonal touch panel is used instead of a circle. It is invention of this. Furthermore, in the method proposed in Patent Document 1, a hexagonal active area (usable area) of the input surface of the touch panel is divided by a certain size of ridge, and each of the ridges is representative. A position number is assigned. The representative position number has two representative position coordinates, that is, the position on the X-axis side of the panel and the position on the Y-axis side of the panel. All the position coordinates are determined by the representative position coordinates. The For this reason, a correlation table for obtaining the position coordinates of the press input point must be set in advance, and a controller for controlling the correspondence relationship with the correlation table must be prepared separately. In the technique disclosed in Patent Document 1, a controller must be prepared in accordance with the shape, such as an octagon or a decagon, even if it is polygonal.
　特許文献２で提案されている手法は、透明電極の面上で、外周辺に対向する形で設けられた基準導電電極と、外周領域に沿って基準導電電極と平行に設けられた複数のサーチ導電電極とを向き合わせて平行四辺形のアクティブエリア（タッチ可能なエリア）を形成させて、アクティブエリアの入力点の位置座標を算出する、とするものである。しかしながら、基準導電電極とサーチ導電電極とがいずれも直線であるため、基準導電電極と外周辺との間の領域と、サーチ導電電極と外周辺との間の領域との間に、アクティブエリアでない領域が形成されてしまう。 The technique proposed in Patent Document 2 is based on a reference conductive electrode provided opposite to the outer periphery on the surface of the transparent electrode, and a plurality of searches provided in parallel with the reference conductive electrode along the outer peripheral region. The conductive electrodes face each other to form a parallelogram active area (touchable area), and the position coordinates of the input points of the active area are calculated. However, since the reference conductive electrode and the search conductive electrode are both straight lines, there is no active area between the region between the reference conductive electrode and the outer periphery and the region between the search conductive electrode and the outer periphery. A region is formed.
　このように、特許文献１及び２で提案されている手法は、いずれも円形のタッチパネルを得ることを目的とした手法であるが、正確にいえば多角形のタッチパネル装置を得るための手法である。さらにいえば、タッチパネル装置の形状を円形とする場合には、タッチパネルの入力の位置精度を示すリニアリティが保たれていなければならないが、特許文献１及び２では、リニアリティを保つための手法について記載も示唆もされていない。 As described above, the methods proposed in Patent Documents 1 and 2 are both methods for obtaining a circular touch panel, but to be precise, it is a method for obtaining a polygonal touch panel device. . Furthermore, when the shape of the touch panel device is circular, the linearity indicating the positional accuracy of the touch panel input must be maintained. However, Patent Documents 1 and 2 also describe a technique for maintaining linearity. There is no suggestion.
　本発明は、このような状況に鑑みてなされたものであり、リニアリティが保たれた、円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することを目的とする。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a circular or substantially circular analog resistive film type touch panel device that maintains linearity.
　上記目的を達成するため、本発明に係る抵抗膜式タッチパネル装置は、
　Ｘ座標回路が形成された円形又は略円形の上部導電膜を有する上部電極部と、Ｙ座標回路が形成された円形又は略円形の下部導電膜を有する下部電極部とが対向するように配置された、アナログ方式の抵抗膜式タッチパネル装置であって、
　前記Ｘ座標回路及び前記Ｙ座標回路には、少なくとも１つの円弧状の電極を有する一対の電極がそれぞれ含まれる、
　ことを特徴とする。 In order to achieve the above object, a resistive film type touch panel device according to the present invention includes:
The upper electrode part having a circular or substantially circular upper conductive film in which the X coordinate circuit is formed and the lower electrode part having a circular or substantially circular lower conductive film in which the Y coordinate circuit is formed are arranged to face each other. In addition, an analog type resistive touch panel device,
The X coordinate circuit and the Y coordinate circuit each include a pair of electrodes having at least one arc-shaped electrode.
It is characterized by that.
　この発明によれば、上部導電膜及び下部導電膜は、形状が円形又は略円形であり、Ｘ座標回路及びＹ座標回路には、少なくとも１つの円弧状の電極を有する一対の電極がそれぞれ含まれるので、円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置のリニアリティを保つことができる。 According to this invention, the upper conductive film and the lower conductive film are circular or substantially circular in shape, and the X coordinate circuit and the Y coordinate circuit each include a pair of electrodes having at least one arc-shaped electrode. Therefore, the linearity of the circular or substantially circular analog resistive film type touch panel device can be maintained.
　本発明に係る抵抗膜式タッチパネル装置において、前記Ｘ座標回路の前記円弧状の電極の中央と前記上部導電膜の中心とを結ぶ直線と、前記Ｙ座標回路の前記円弧状の電極の中央と前記下部導電膜の中心とを結ぶ直線とが直交する、ことが好ましい。
　この発明によれば、一対の電極をそれぞれ含むＸ座標回路の前記円弧状の電極の中央と前記上部導電膜の中心とを結ぶ直線と、Ｙ座標回路の前記円弧状の電極の中央と前記下部導電膜の中心とを結ぶ直線とが直交するので、タッチされた位置を特定するための座標軸が好適に形成される。その結果、リニアリティがより保たれた円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することができる。 In the resistive touch panel device according to the present invention, a straight line connecting the center of the arc-shaped electrode of the X coordinate circuit and the center of the upper conductive film, the center of the arc-shaped electrode of the Y coordinate circuit, and the It is preferable that a straight line connecting the center of the lower conductive film is orthogonal.
According to the present invention, a straight line connecting the center of the arc-shaped electrode of the X coordinate circuit including a pair of electrodes and the center of the upper conductive film, and the center and the lower portion of the arc-shaped electrode of the Y coordinate circuit. Since the straight line connecting the center of the conductive film is orthogonal, a coordinate axis for specifying the touched position is suitably formed. As a result, it is possible to provide a circular or substantially circular analog resistive film type touch panel device with more maintained linearity.
　本発明に係る抵抗膜式タッチパネル装置において、前記円弧状の電極の中心角が９０度～１７０度である、ことが好ましい。
　この発明によれば、円弧状の電極の中心角が９０度～１７０度で構成されているので、要求されるリニアリティのレベルに応じた、円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することができる。 In the resistive film type touch panel device according to the present invention, it is preferable that a center angle of the arc-shaped electrode is 90 degrees to 170 degrees.
According to the present invention, since the central angle of the arc-shaped electrode is 90 ° to 170 °, a circular or substantially circular analog resistive film type touch panel device corresponding to the required level of linearity is provided. Can be provided.
　本発明に係る抵抗膜式タッチパネル装置において、理論出力電圧直線からの最大編位置と最大電圧との百分率によって求められる、リニアリティを示す値が、±１．５％である、ことが好ましい。
　この発明によれば、リニアリティを示す値が±１．５％で構成されているので、リニアリティがさらに保たれた、円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することができる。 In the resistive touch panel device according to the present invention, it is preferable that the value indicating linearity obtained by the percentage of the maximum knitting position and the maximum voltage from the theoretical output voltage line is ± 1.5%.
According to the present invention, since the value indicating linearity is ± 1.5%, it is possible to provide a circular or substantially circular analog resistive film type touch panel device that further maintains linearity.
　本発明に係る抵抗膜式タッチパネル装置において、前記一対の電極の両方が前記円弧状の電極である、ことが好ましい。
　この発明によれば、一対の電極の両方が円弧状の電極になっているので、対向する電極間の電圧分布のリニアリティをさらに高いレベルで保つことができる。 In the resistive touch panel device according to the present invention, it is preferable that both of the pair of electrodes are the arc-shaped electrodes.
According to this invention, since both of the pair of electrodes are arc-shaped electrodes, the linearity of the voltage distribution between the opposing electrodes can be maintained at a higher level.
　本発明に係る抵抗膜式タッチパネル装置において、前記上部電極部の外縁と前記下部電極部の外縁とは、折り曲げ可能な接合部によって一部が接合されており、前記接合部を折り曲げることにより、前記上部電極部と前記下部電極部とが重なり合い、対向するように配置される、ことが好ましい。
　この発明によれば、上部電極部と下部電極部とを容易に重ね合わせて一体化させることができる。 In the resistive touch panel device according to the present invention, a part of the outer edge of the upper electrode part and the outer edge of the lower electrode part are joined by a foldable joint part, and by bending the joint part, It is preferable that the upper electrode portion and the lower electrode portion are arranged so as to overlap and face each other.
According to the present invention, the upper electrode portion and the lower electrode portion can be easily overlapped and integrated.
　本発明によれば、リニアリティが保たれた、円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することができる。 According to the present invention, it is possible to provide a circular or substantially circular analog resistive film type touch panel device that maintains linearity.
本発明の抵抗膜式タッチパネル装置の一実施形態を示す外観平面図である。It is an external appearance top view which shows one Embodiment of the resistive film type touch panel apparatus of this invention. 本発明の抵抗膜式タッチパネル装置の一実施形態を示す外観断面図の一部を示す図である。It is a figure which shows a part of external appearance sectional drawing which shows one Embodiment of the resistive film type touch panel apparatus of this invention. 本発明の抵抗膜式タッチパネル装置が有する電極の具体例と比較例のうち、全ての電極の形状が点状である場合を示す図である。It is a figure which shows the case where the shape of all the electrodes is a dot shape among the specific examples and the comparative example of the electrode which the resistive film type touch panel apparatus of this invention has. 本発明の抵抗膜式タッチパネル装置が有する電極の具体例と比較例のうち、電極の形状が点状及び円弧状である場合を示す図である。It is a figure which shows the case where the shape of an electrode is dot shape and circular arc shape among the specific examples and the comparative example of the electrode which the resistive film type touch panel apparatus of this invention has. 本発明の抵抗膜式タッチパネル装置が有する電極の具体例と比較例のうち、全ての電極の形状が円弧状である場合を示す図である。It is a figure which shows the case where the shape of all the electrodes is circular arc shape among the specific examples and the comparative example of the electrode which the resistive film type touch panel apparatus of this invention has. 電極の形状が図２Ａのパターンである場合におけるリニアリティを示す電圧マッピングの平面図である。It is a top view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2A. 電極の形状が図２Ａのパターンである場合におけるリニアリティを示す電圧マッピングの斜視図である。It is a perspective view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2A. 電極の形状が図２Ｂのパターンである場合におけるリニアリティを示す電圧マッピングの平面図である。It is a top view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2B. 電極の形状が図２Ｂのパターンである場合におけるリニアリティを示す電圧マッピングの斜視図である。It is a perspective view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2B. 電極の形状が図２Ｃのパターンである場合におけるリニアリティを示す電圧マッピングの平面図である。It is a top view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2C. 電極の形状が図２Ｃのパターンである場合におけるリニアリティを示す電圧マッピングの斜視図である。It is a perspective view of the voltage mapping which shows the linearity in case the shape of an electrode is the pattern of FIG. 2C. 図２Ａの抵抗膜式タッチパネル装置を用いて、文字と図形を描いた例を示す図である。It is a figure which shows the example which drew the character and the figure using the resistive film type touch panel apparatus of FIG. 2A. 図２Ｂの抵抗膜式タッチパネル装置を用いて、文字と図形を描いた例を示す図である。It is a figure which shows the example which drew the character and the figure using the resistive film type touch panel apparatus of FIG. 2B. 図２Ｃの抵抗膜式タッチパネル装置を用いて、文字と図形を描いた例を示す図である。It is a figure which shows the example which drew the character and the figure using the resistive film type touch panel apparatus of FIG. 2C. 本発明の抵抗膜式タッチパネル装置の電極の形状が円弧状のみの場合の例を示す図であり円弧状の電極の中心角が９０度である場合を示す図である。It is a figure which shows the example in case the shape of the electrode of the resistive touch panel apparatus of this invention is only circular arc shape, and is a figure which shows the case where the center angle | corner of an arc-shaped electrode is 90 degree | times. 本発明の抵抗膜式タッチパネル装置の電極の形状が円弧状のみの場合の例を示す図であり、円弧状の電極の中心角が１２０度である場合を示す図である。It is a figure which shows the example in case the shape of the electrode of the resistive touch panel apparatus of this invention is only circular arc shape, and is a figure which shows the case where the center angle of an arc-shaped electrode is 120 degree | times. 本発明の抵抗膜式タッチパネル装置の電極の形状が円弧状のみの場合の例を示す図であり、円弧状の電極の中心角が１５０度である場合を示す図である。It is a figure which shows the example in case the shape of the electrode of the resistive touch panel apparatus of this invention is only circular arc shape, and is a figure which shows the case where the center angle of an arc-shaped electrode is 150 degree | times. 本発明の抵抗膜式タッチパネル装置の電極の形状が円弧状のみの場合の例を示す図であり、円弧状の電極の中心角が１７０度である場合を示す図である。It is a figure which shows the example in case the shape of the electrode of the resistive touch panel apparatus of this invention is only circular arc shape, and is a figure which shows the case where the center angle of an arc-shaped electrode is 170 degree | times. 従来技術としてのアナログ方式の抵抗膜式タッチパネル装置のうち、４線式アナログ抵抗膜式タッチパネル装置の断面図である。It is sectional drawing of a 4-wire type | system | group analog resistive film type touch panel apparatus among the analog type resistive film type touch panel apparatuses as a prior art. 従来技術としてのアナログ方式の抵抗膜式タッチパネル装置のうち、４線式アナログ抵抗膜式タッチパネル装置の構成を示すイメージ図である。It is an image figure which shows the structure of a 4-wire type analog resistive touch panel apparatus among the analog resistive film type touch panel apparatuses as a prior art. 従来技術としてのアナログ方式の抵抗膜式タッチパネル装置のうち、４線式アナログ抵抗膜式タッチパネル装置の等価回路を示す図である。It is a figure which shows the equivalent circuit of a 4-wire type analog resistive film type touch panel apparatus among the analog type resistive film type touch panel apparatuses as a prior art.
　本発明の一実施形態である抵抗膜式タッチパネル装置１について、図面を参照しつつ説明する。なお、本発明は下記の実施形態に限定されるものではない。 A resistive touch panel device 1 according to an embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment.
　図１Ａ及びＢは、抵抗膜式タッチパネル装置１の外観図である。図１Ａは抵抗膜式タッチパネル装置１の平面図、図１Ｂは抵抗膜式タッチパネル装置１の断面図である。 1A and 1B are external views of the resistive touch panel device 1. FIG. FIG. 1A is a plan view of the resistive touch panel device 1, and FIG. 1B is a cross-sectional view of the resistive touch panel device 1.
　［基本構成］
　抵抗膜式タッチパネル装置１は、図１Ａ及びＢに示すように、円形又は略円形の上部電極部１１と下部電極部２１とが対向するように配置されたアナログ方式の抵抗膜式タッチパネル装置であって、上部電極部１１は、円形又は略円形の上部電極板１０１と、一対の電極（電極１１１及び１１２）を含むＸ座標回路１００が形成された円形又は略円形の上部導電膜１０２と、を少なくとも有し、下部電極部２１は、円形又は略円形の下部電極板２０１と、一対の電極（電極２１１及び２１２）を含むＹ座標回路２００が形成された円形又は略円形の下部導電膜２０２と、ドットスペーサ２０３と、を少なくとも有し、Ｘ座標回路１００及びＹ座標回路２００には、少なくとも１以上の円弧状の電極がそれぞれ含まれる。
　抵抗膜式タッチパネル装置１に電力が供給された状態で、抵抗膜式タッチパネル装置１の表面が指やタッチペン等でタッチされると、タッチされた位置の上部電極部１１がたわみ、ドットスペーサ２０３が存在しない部分で上部電極部１１と下部電極部２１とが接触して導電するので、その電圧値に基づいて、タッチされた位置の座標を検出することが可能となる。 [Basic configuration]
1A and 1B, the resistive film type touch panel device 1 is an analog type resistive film type touch panel device in which a circular or substantially circular upper electrode part 11 and a lower electrode part 21 are arranged to face each other. The upper electrode portion 11 includes a circular or substantially circular upper electrode plate 101, and a circular or substantially circular upper conductive film 102 on which an X coordinate circuit 100 including a pair of electrodes (electrodes 111 and 112) is formed. The lower electrode unit 21 includes at least a circular or substantially circular lower electrode plate 201, and a circular or substantially circular lower conductive film 202 on which a Y coordinate circuit 200 including a pair of electrodes (electrodes 211 and 212) is formed. , And dot spacers 203. The X coordinate circuit 100 and the Y coordinate circuit 200 each include at least one arc-shaped electrode.
When the surface of the resistive touch panel device 1 is touched with a finger, a touch pen or the like while power is supplied to the resistive touch panel device 1, the upper electrode portion 11 at the touched position is deflected, and the dot spacer 203 is Since the upper electrode portion 11 and the lower electrode portion 21 are in contact with each other and conduct in a portion that does not exist, the coordinates of the touched position can be detected based on the voltage value.
　以下、抵抗膜式タッチパネル装置１の各構成要素について詳しく説明する。 Hereinafter, each component of the resistive touch panel device 1 will be described in detail.
　［上部電極部］
　上部電極部１１は、円形又は略円形の上部電極板１０１と、一対の電極（電極１１１及び１１２）を含むＸ座標回路１００が形成された円形又は略円形の上部導電膜１０２と、を少なくとも有する。なお、「少なくとも」としたのは、それ以外の構成要素が含まれていてもよいことを意味する。例えば、上部電極板１０１の表面を傷や汚れなどから保護するための、円形又は略円状のハードコート（図示せず）等が上部電極部１１に含まれていてもよい。 [Upper electrode part]
The upper electrode portion 11 includes at least a circular or substantially circular upper electrode plate 101 and a circular or substantially circular upper conductive film 102 on which an X coordinate circuit 100 including a pair of electrodes (electrodes 111 and 112) is formed. . Note that “at least” means that other components may be included. For example, the upper electrode portion 11 may include a circular or substantially circular hard coat (not shown) for protecting the surface of the upper electrode plate 101 from scratches and dirt.
　（上部電極板）
　上部電極板１０１は、上部電極部１１の上部に配置された円形又は略円形の電極板である。上部電極板１０１は、指やタッチペンでタッチされることでたわむ透明な素材で構成される。例えば、ＰＥＴ（ポリエチレンテレフタラート）フィルムや薄いガラス等の素材を上部電極板１０１として用いることができる。上部電極板１０１の上部表面には、上部電極板１０１の表面を傷や汚れなどから保護するためのハードコート（図示せず）を付着させる処理が施されていてもよい。 (Upper electrode plate)
The upper electrode plate 101 is a circular or substantially circular electrode plate disposed above the upper electrode portion 11. The upper electrode plate 101 is made of a transparent material that bends when touched with a finger or a touch pen. For example, a material such as a PET (polyethylene terephthalate) film or thin glass can be used as the upper electrode plate 101. The upper surface of the upper electrode plate 101 may be subjected to a process of attaching a hard coat (not shown) for protecting the surface of the upper electrode plate 101 from scratches and dirt.
　（上部導電膜）
　上部導電膜１０２は、上部電極板１０１の下部に、後述する下部導電膜２０２に対向するように配置された円形又は略円形の導電膜である。上部導電膜１０２の表面には、一対の円弧状の電極（電極１１１及び電極１１２）を含むＸ座標回路１００が形成されている。なお、電極１１１及び電極１１２の具体的な形状の他の例については、図２Ａ～Ｃを参照して後述する。上部導電膜１０２は、均一な抵抗値を有するが、具体的な抵抗値は特に限定されない。例えば、抵抗値が３００Ω／□～５００Ω／□程度のものを用いることができる。上部導電膜１０２の材質は特に限定されない。透明なフィルムに対し、ＩＴＯ（Ｉｎｄｉｕｍ　Ｔｉｎ　Ｏｘｉｄｅ：酸化インジウムスズ）を蒸着したものや、銀等の金属材料を塗布（印刷）したものを用いることができる。 (Upper conductive film)
The upper conductive film 102 is a circular or substantially circular conductive film disposed below the upper electrode plate 101 so as to face a lower conductive film 202 described later. On the surface of the upper conductive film 102, an X coordinate circuit 100 including a pair of arc-shaped electrodes (electrode 111 and electrode 112) is formed. Other examples of specific shapes of the electrodes 111 and 112 will be described later with reference to FIGS. 2A to 2C. The upper conductive film 102 has a uniform resistance value, but the specific resistance value is not particularly limited. For example, a resistance value of about 300Ω / □ to 500Ω / □ can be used. The material of the upper conductive film 102 is not particularly limited. A film obtained by depositing ITO (Indium Tin Oxide) or a metal material such as silver (printing) on a transparent film can be used.
　［下部電極部］
　下部電極部２１は、図１Ａ及びＢに示すように、円形又は略円形の下部電極板２０１と、一対の電極（電極２１１及び２１２）を含むＹ座標回路２００が形成された下部導電膜２０２と、ドットスペーサ２０３と、を少なくとも有する。なお、「少なくとも」としたのは、それ以外の構成要素が含まれていてもよいことを意味する。例えば、光の反射を低減させるための位相差板（図示せず）等が下部電極部２１に含まれていてもよい。 [Lower electrode part]
As shown in FIGS. 1A and 1B, the lower electrode unit 21 includes a circular or substantially circular lower electrode plate 201, and a lower conductive film 202 on which a Y coordinate circuit 200 including a pair of electrodes (electrodes 211 and 212) is formed. And dot spacers 203 at least. Note that “at least” means that other components may be included. For example, the lower electrode portion 21 may include a retardation plate (not shown) for reducing light reflection.
　（下部電極板）
　下部電極板２０１は、下部電極部２１の下部に配置された円形又は略円形の電極板である。下部電極板２０１の材質は特に限定されない。例えば、ソーダガラス（ソーダライムガラス、ソーダ石灰ガラス）、プラスチック製の板、フィルム等を用いることができる。 (Lower electrode plate)
The lower electrode plate 201 is a circular or substantially circular electrode plate disposed below the lower electrode portion 21. The material of the lower electrode plate 201 is not particularly limited. For example, soda glass (soda lime glass, soda lime glass), a plastic plate, a film, or the like can be used.
　（下部導電膜）
　下部導電膜２０２は、下部電極板２０１の上部に、ドットスペーサ２０３を挟んで上部導電膜１０２に対向するように配置された導電膜である。下部導電膜２０２の表面には、一対の電極（電極２１１及び電極２１２）を含むＹ座標回路２００が形成されている。下部導電膜２０２は、均一な抵抗値をもつが、具体的な抵抗値は特に限定されない。例えば、抵抗値が３００Ω／□～５００Ω／□程度のものを用いることができる。下部導電膜２０２の素材は特に限定されない。透明なフィルムに対し、ＩＴＯ（Ｉｎｄｉｕｍ　Ｔｉｎ　Ｏｘｉｄｅ：酸化インジウムスズ）を蒸着したものや、銀等の金属材料を塗布（印刷）したものであってもよい。 (Lower conductive film)
The lower conductive film 202 is a conductive film disposed on the lower electrode plate 201 so as to face the upper conductive film 102 with the dot spacer 203 interposed therebetween. On the surface of the lower conductive film 202, a Y coordinate circuit 200 including a pair of electrodes (electrodes 211 and 212) is formed. The lower conductive film 202 has a uniform resistance value, but the specific resistance value is not particularly limited. For example, a resistance value of about 300Ω / □ to 500Ω / □ can be used. The material of the lower conductive film 202 is not particularly limited. The transparent film may be a film obtained by depositing ITO (Indium Tin Oxide) or a metal material such as silver applied (printed).
　（ドットスペーサ）
　ドットスペーサ２０３は、上部導電膜１０２と下部導電膜２０２との間に形成された絶縁体であり、抵抗膜式タッチパネル装置１に対するタッチ操作がなされていないときに上部導電膜１０２と下部導電膜２０２とが誤接触することを防止する。具体的には、ドットスペーサ２０３は、印刷等の手法によって下部導電膜２０２の表面に形成される。これにより、環境などの外的な要因によって上部導電膜１０２と下部導電膜２０２とがショートしてしまうことを防ぐことができる。 (Dot spacer)
The dot spacer 203 is an insulator formed between the upper conductive film 102 and the lower conductive film 202, and when the touch operation on the resistive touch panel device 1 is not performed, the upper conductive film 102 and the lower conductive film 202. Prevent accidental contact with. Specifically, the dot spacer 203 is formed on the surface of the lower conductive film 202 by a technique such as printing. Thereby, it is possible to prevent the upper conductive film 102 and the lower conductive film 202 from being short-circuited due to external factors such as the environment.
　以上のように、上部電極部１１において、上部電極板１０１は、円形又は略円形であるとともに、上部導電膜１０２の表面には、一対の円弧状の電極（電極１１１及び電極１１２）を含むＸ座標回路１００が形成されている。また、下部電極部２１において、下部電極板２０１は、円形又は略円形であるとともに、下部導電膜２０２の表面には、一対の円弧状の電極（電極２１１及び電極２１２）を含むＹ座標回路１００が形成されている。上部電極部１１と下部電極部２１とが上記の構成を有するので、リニアリティが保たれた、円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することが可能となる。
　ここで、「リニアリティ」とは、直線性を意味し、抵抗膜式タッチパネル装置１の入力の位置精度を示す概念である。すなわち、抵抗膜式タッチパネル装置１の入力の位置精度は、上部導電膜１０２及び下部導電膜２０２の均一性によって左右されるものであるため、例えば理論出力電圧直線からの最大編位置と最大電圧との百分率で求められる値によって、リニアリティが保たれているか否かが判断される。
　なお、電極１１１及び電極１１２の具体的な形状の他の例については、図２Ａ～Ｃを参照して後述する。 As described above, in the upper electrode portion 11, the upper electrode plate 101 is circular or substantially circular, and the surface of the upper conductive film 102 includes a pair of arc-shaped electrodes (electrode 111 and electrode 112). A coordinate circuit 100 is formed. In the lower electrode portion 21, the lower electrode plate 201 is circular or substantially circular, and a Y coordinate circuit 100 including a pair of arc-shaped electrodes (electrodes 211 and 212) on the surface of the lower conductive film 202. Is formed. Since the upper electrode portion 11 and the lower electrode portion 21 have the above-described configuration, it is possible to provide a circular or substantially circular analog resistive film type touch panel device that maintains linearity.
Here, “linearity” means linearity and is a concept indicating the positional accuracy of the input of the resistive touch panel device 1. That is, since the input position accuracy of the resistive touch panel device 1 depends on the uniformity of the upper conductive film 102 and the lower conductive film 202, for example, the maximum knitting position and the maximum voltage from the theoretical output voltage straight line Whether or not linearity is maintained is determined based on the value obtained as a percentage.
Other examples of specific shapes of the electrodes 111 and 112 will be described later with reference to FIGS. 2A to 2C.
　次に、抵抗膜式タッチパネル装置１の電極の具体例及び比較例について説明する。
　図２Ａ～Ｃは、抵抗膜式タッチパネル装置１の電極の具体例及び比較例を示す図である。図３Ａ及びＢ～図５Ａ及びＢは、図２Ａ～Ｃの具体例及び比較例のそれぞれについて、リニアリティを示す電圧マッピングである。ここで、電圧マッピングとは、抵抗膜式タッチパネル装置１の形状に重畳して表示されるグラフであって、同じ大きさの電圧の部分が同じ層を形成するように色や色彩等により区分けして表示されたグラフである。リニアリティが保たれている場合、層の境界線が直線又は直線に近い形状で表示される。なお、図３Ａ及びＢ～図５Ａ及びＢに示す電圧マッピングは、説明の便宜上、上部電極部１１の電圧分布のみを示している。下部電極部２１の電圧マッピングは、上部電極部１１の電圧マッピングを９０度回転させたものであるため記載を省略している。 Next, specific examples of electrodes of the resistive touch panel device 1 and comparative examples will be described.
2A to 2C are diagrams illustrating specific examples and comparative examples of electrodes of the resistive touch panel device 1. FIG. FIGS. 3A and B to FIGS. 5A and 5B are voltage mappings showing linearity for the specific examples and comparative examples of FIGS. 2A to C, respectively. Here, the voltage mapping is a graph that is displayed superimposed on the shape of the resistive touch panel device 1, and is divided according to color, color, etc. so that portions of the same voltage form the same layer. Is a graph displayed. When the linearity is maintained, the boundary line of the layer is displayed in a straight line or a shape close to a straight line. Note that the voltage mapping shown in FIGS. 3A and 3 to FIGS. 5A and 5B shows only the voltage distribution of the upper electrode portion 11 for convenience of explanation. The voltage mapping of the lower electrode portion 21 is omitted because the voltage mapping of the upper electrode portion 11 is rotated 90 degrees.
　ところで、抵抗膜式タッチパネル装置１は、上部電極部１１の外縁と下部電極部２１の外縁との接合部３１を支点として、上部電極部１１と下部電極部２１との２つに開くことができる。また、２つに開かれた状態にある上部電極部１１と下部電極部２１とを、接合部３１を支点として折り曲げて重ね合わせることにより一体化させて、抵抗膜式タッチパネル装置１を形成させることができる。図２Ａ～Ｃ及び図７Ａ～Ｄには、抵抗膜式タッチパネル装置１を、接合部３１を支点として上部電極部１１と下部電極部２１との２つに開いた状態を示す図を記載している。 By the way, the resistive touch panel device 1 can be opened to the upper electrode part 11 and the lower electrode part 21 with the joint part 31 between the outer edge of the upper electrode part 11 and the outer edge of the lower electrode part 21 as a fulcrum. . Further, the resistive electrode type touch panel device 1 is formed by integrating the upper electrode portion 11 and the lower electrode portion 21 that are opened in two by folding and joining them with the joint portion 31 as a fulcrum. Can do. FIGS. 2A to 2C and FIGS. 7A to 7D are diagrams showing a state in which the resistive touch panel device 1 is opened to the upper electrode portion 11 and the lower electrode portion 21 with the joint portion 31 as a fulcrum. Yes.
　図３Ａ及びＢ～図５Ａ及びＢに示す電圧マッピングは、以下の電位測定方法によって測定した結果を示したものである。すなわち、上部電極部１１及び下部電極部２１のそれぞれが有する一対の電極のうち、一方の電極（例えば電極１１１）に５Ｖ（ボルト）の電圧を印加し、もう一方の電極（例えば電極１１２）をＧＮＤ（グラウンド）として、マルチメータ（回路計）を用いて電圧を測定した。点の電位を複数箇所測定することにより、抵抗膜式タッチパネル装置１全体の抵抗値分布を読み出した。具体的には、マルチメータのＧＮＤ側を電極のＧＮＤと接続し、マルチメータの電圧測定側プローブと上部電極部１１とを接続して、測定箇所（測定の対象となる点）に指で触れたときの電圧を測定した。測定箇所の数は４００箇所とした。 The voltage mapping shown in FIGS. 3A and B to FIGS. 5A and 5B shows the results measured by the following potential measurement method. That is, a voltage of 5 V (volt) is applied to one electrode (for example, electrode 111) of the pair of electrodes of each of the upper electrode portion 11 and the lower electrode portion 21, and the other electrode (for example, electrode 112) is applied. The voltage was measured using a multimeter (circuit meter) as GND (ground). The resistance value distribution of the entire resistive film touch panel device 1 was read out by measuring the potential of the point at a plurality of locations. Specifically, the GND side of the multimeter is connected to the GND of the electrode, the voltage measurement side probe of the multimeter and the upper electrode unit 11 are connected, and the measurement location (point to be measured) is touched with a finger. The voltage was measured. The number of measurement locations was 400.
　（電極の比較例１）
　図２Ａは、電極が全て点状のもので構成されている場合を示す図である。具体的には、上部電極部１１の電極１１１及び電極１１２と、下部電極部２１の電極２１１及び電極２１２とが、全て点状の電極で構成されている。電極１１１及び電極１１２は、上部電極部１１の上下端部又はその付近に配置されており、電極２１１及び電極２１２は、下部電極部２１の左右端部又はその付近に配置されている。これら４つの電極（電極１１１，１１２，２１１，及び２１２）は、接合部３１を支点として下部電極部２１折り曲げて、上部電極部１１と下部電極部２１とを重ね合せたとしても、電極同士が重なり合うことないように配置されている。
　このように、４つの電極が、全て点状のもので構成されている場合には、図３Ａ及びＢの電圧マッピングに示すように、電極を中心に、全体の３分の１程度の範囲で、電圧が円弧状に分布しており、リニアリティが保たれた電圧分布になっていない。これに対して、円弧状の電極（電極１１２及び２１２）側では、点状の電極側に比べてはるかにリニアリティが保たれた電圧分布になっている。また、点状の電極と円弧状の電極との中間点付近では、電極付近に比べてリニアリティが保たれた電圧分布になっている。 (Electrode Comparative Example 1)
FIG. 2A is a diagram illustrating a case where all the electrodes are formed of dots. Specifically, the electrode 111 and the electrode 112 of the upper electrode part 11 and the electrode 211 and the electrode 212 of the lower electrode part 21 are all constituted by point-like electrodes. The electrodes 111 and 112 are disposed at the upper and lower ends of the upper electrode portion 11 or in the vicinity thereof, and the electrodes 211 and 212 are disposed at the left and right ends of the lower electrode portion 21 or in the vicinity thereof. These four electrodes ( electrodes 111, 112, 211, and 212) are bent even when the lower electrode portion 21 is bent with the joint portion 31 as a fulcrum, and the upper electrode portion 11 and the lower electrode portion 21 are overlapped. They are arranged so that they do not overlap.
In this way, when the four electrodes are all composed of dots, as shown in the voltage mapping of FIGS. 3A and 3B, the range is about one third of the whole centered on the electrodes. The voltage is distributed in an arc shape, and the voltage distribution is not maintained with linearity. On the other hand, on the side of the arc-shaped electrodes (electrodes 112 and 212), the voltage distribution is far more linear than the point-shaped electrode side. Further, in the vicinity of an intermediate point between the point-like electrode and the arc-like electrode, the voltage distribution is maintained with linearity as compared with the vicinity of the electrode.
　（電極の具体例１）
　図２Ｂは、電極が円弧状のものと点状のものとで構成されている場合を示す図である。具体的には、上部電極部１１のうち、電極１１１を円弧状の電極とし、電極１１２を点状の電極としている。電極１１１は、中心角が９０度の円弧状の電極であり、開いた状態の上部電極部１１の下側端部又はその付近に、上部電極部１１の縁の湾曲形状に沿うように配置されている。電極１１２は、開いた状態の上部電極部１１の上側端部又はその付近に配置されている。また、下部電極部２１のうち、電極２１１を点状の電極とし、電極２１２を円弧状の電極としている。電極２１１は、下部電極部２１の左側端部又はその付近に配置されている。電極２１２は、中心角が９０度の円弧状の電極であり、下部電極部２１の右側端部又はその付近に、下部電極部２１の縁の湾曲形状に沿うように配置されている。これら４つの電極（電極１１１，１１２，２１１，及び２１２）は、接合部３１を支点として折り曲げて、上部電極部１１と下部電極部２１とを重ね合せたとしても、電極同士が重なり合うことないように配置されている。ここで、中心角とは、円弧状の電極の両端と、円形又は略円形の導電膜の中心とを結ぶ２つの半径がなす角度である。
　このように、４つの電極が、円弧状のものと点状のものとで構成されている場合には、図４Ａ及びＢの電圧マッピングに示すように、点状の電極（電極１１２及び２１１）側では、点状の電極を中心に、全体の３分の１程度の範囲で、電圧が円弧状に分布している。また、電極と電極との中間点付近では、電極付近に比べてはるかにリニアリティが保たれた電圧分布になっている。 (Specific example 1 of electrode)
FIG. 2B is a diagram illustrating a case where the electrode is configured by an arc shape and a dot shape. Specifically, in the upper electrode portion 11, the electrode 111 is an arc-shaped electrode and the electrode 112 is a dot-shaped electrode. The electrode 111 is an arc-shaped electrode having a central angle of 90 degrees, and is arranged along the curved shape of the edge of the upper electrode portion 11 at or near the lower end portion of the upper electrode portion 11 in the opened state. ing. The electrode 112 is disposed at or near the upper end of the opened upper electrode part 11. In the lower electrode portion 21, the electrode 211 is a dot electrode, and the electrode 212 is an arc-shaped electrode. The electrode 211 is disposed at the left end portion of the lower electrode portion 21 or in the vicinity thereof. The electrode 212 is an arc-shaped electrode having a central angle of 90 degrees, and is arranged along the curved shape of the edge of the lower electrode portion 21 at or near the right end portion of the lower electrode portion 21. Even if these four electrodes ( electrodes 111, 112, 211, and 212) are bent with the joint 31 as a fulcrum and the upper electrode portion 11 and the lower electrode portion 21 are overlapped, the electrodes do not overlap each other. Is arranged. Here, the central angle is an angle formed by two radii connecting both ends of the arc-shaped electrode and the center of the circular or substantially circular conductive film.
As described above, when the four electrodes are formed of an arc shape and a point shape, as shown in the voltage mapping of FIGS. 4A and 4B, the point electrodes (electrodes 112 and 211) are formed. On the side, the voltage is distributed in an arc shape in the range of about one third of the whole centering on the point-like electrode. Further, in the vicinity of the intermediate point between the electrodes, the voltage distribution is far more linear than the vicinity of the electrodes.
　（電極の具体例２）
　図２Ｃは、電極が全て円弧状のもので構成されている場合示す図である。すなわち、図２Ｃは、図１Ａに示す抵抗膜式タッチパネル装置１の電極の形状を示している。図２Ｃに示すように、上部電極部１１の電極１１１及び電極１１２は、いずれも中心角が９０度の円弧状の電極であり、上部電極部１１の上下端部又はその付近に、上部電極部１１の淵の湾曲形状に沿うようにそれぞれ配置されている。また、下部電極部２１の電極２１１及び電極２１２は、いずれも中心角が９０度の円弧状の電極であり、下部電極部２１の左右の端部又はその付近に、下部電極部２１の縁の湾曲形状に沿うようにそれぞれ配置されている。上述したように、抵抗膜式タッチパネル装置１は、上部電極部１１と下部電極部２１とが接合部３１を支点として折り曲げられて、重なり合うことで形成される。このとき、これら４つの円弧状の電極（電極１１１，１１２，２１１，及び２１２）は、いずれも中心角が９０度の円弧状の電極であるため、電極同士が互いに重なり合う部分を有することなく、かつ、隙間なく配置される。これにより、図１Ａに示すような、円形又は略円形の電極を有する抵抗膜式タッチパネル装置１を形成させることができる。 (Specific example 2 of electrode)
FIG. 2C is a diagram illustrating a case where all the electrodes are formed in an arc shape. That is, FIG. 2C shows the shape of the electrode of the resistive touch panel device 1 shown in FIG. 1A. As shown in FIG. 2C, the electrode 111 and the electrode 112 of the upper electrode portion 11 are both arc-shaped electrodes having a central angle of 90 degrees, and the upper electrode portion is located at or near the upper and lower ends of the upper electrode portion 11. 11 are arranged so as to follow the curved shape of the elbow. Each of the electrodes 211 and 212 of the lower electrode portion 21 is an arc-shaped electrode having a central angle of 90 degrees, and the edge of the lower electrode portion 21 is formed at or near the left and right ends of the lower electrode portion 21. Each is arranged along a curved shape. As described above, the resistive touch panel device 1 is formed by the upper electrode portion 11 and the lower electrode portion 21 being folded with the joint portion 31 as a fulcrum and overlapping. At this time, since these four arc-shaped electrodes ( electrodes 111, 112, 211, and 212) are all arc-shaped electrodes having a central angle of 90 degrees, the electrodes do not have a portion where they overlap each other. And it arrange | positions without a clearance gap. Thereby, the resistive touch panel device 1 having circular or substantially circular electrodes as shown in FIG. 1A can be formed.
　以上のように、上部電極部１１及び下部電極部２１に円弧状の電極が含まれる場合には、リニアリティを保つ効果を奏する。特に、４つの電極の全てが円弧状のもので構成されている場合には、図５Ａ及びＢの電圧マッピングに示されるように、全体的にリニアリティが高い電圧分布になる。すなわち、円形又は略円形の面抵抗に対して、対向する一対の電極を設けた状態で電圧分布にリニアリティを求める場合には、円面に対して外周付近に円弧状の電極を設けるのが好適である。これにより、対向する電極間の電圧分布にリニアリティをもたせることができる。 As described above, when the upper electrode portion 11 and the lower electrode portion 21 include arc-shaped electrodes, the effect of maintaining linearity is achieved. In particular, when all of the four electrodes are formed in an arc shape, as shown in the voltage mapping of FIGS. 5A and 5B, the voltage distribution has a high linearity as a whole. That is, when the linearity is obtained in the voltage distribution with a pair of electrodes facing each other with respect to a circular or substantially circular surface resistance, it is preferable to provide an arc-shaped electrode near the outer periphery of the circular surface. It is. Thereby, linearity can be given to the voltage distribution between the electrodes which oppose.
　このように、抵抗膜式タッチパネル装置１は、公知な矩形の抵抗膜式タッチパネル装置と同等の理論出力電圧直線からの最大編位置と最大電圧との百分率が±１．５％であるリニアリティを保つことができるので、例えば公知な矩形のアナログ式タッチパネル用コントロールボード（図示せず）に抵抗膜式タッチパネル装置１を接続して、キャリブレーションを行うことにより、公知な矩形のアナログ式タッチパネル同様に文字等の描画のダウン位置の検出ができるようになる。換言すれば、円形又は略円形であるために、専用のコントロールボードを用意する必要がなく、開発費を低減させることができる。 As described above, the resistive touch panel device 1 maintains linearity in which the percentage between the maximum knitting position and the maximum voltage from the theoretical output voltage straight line equivalent to that of the known rectangular resistive touch panel device is ± 1.5%. For example, by connecting the resistive touch panel device 1 to a known rectangular analog touch panel control board (not shown) and performing calibration, characters can be obtained in the same manner as the known rectangular analog touch panel. It is possible to detect the down position of the drawing. In other words, since it is circular or substantially circular, it is not necessary to prepare a dedicated control board, and development costs can be reduced.
　図６Ａ～Ｃは、抵抗膜式タッチパネル装置１を用いて、文字（アルファベットで「Ｙａｍａｎａｋａ」の文字）と図形（「☆」の図形と「◎」の図形）を描いた場合の比較例を示す図である。図６Ａは電極の全てが点状の電極で構成されている場合の例、図６Ｂは点状の電極と円弧状の電極とで構成されている場合の例、図６Ｃは電極の全てが円弧状の電極で構成されている場合の例を示している。 FIGS. 6A to 6C show comparative examples in the case where characters (characters “Yamanaka” in alphabets) and figures (“☆” and “◎”) are drawn using the resistive touch panel device 1. FIG. FIG. 6A shows an example in which all of the electrodes are constituted by point-like electrodes, FIG. 6B shows an example in which the electrodes are constituted by dot-like electrodes and arc-shaped electrodes, and FIG. 6C shows that all of the electrodes are circular. The example in the case of being comprised by the arc-shaped electrode is shown.
　電極の全てが点状の電極で構成されている場合は、図６Ａに示すように、文字（アルファベット）は曲がって表示され、「◎」の図形も「□」の図形で表示された。点状の電極と円弧状の電極とで構成されている場合は、図６Ｂに示すように、文字（アルファベット）は曲がって表示され、「◎」の図形の一部は「□」の図形で表示されたが、円弧状の電極側では「◎」の図形で表示された。電極の全てが円弧状の電極で構成されている場合は、図６Ｃに示すように、入力通りに表示された。
　このように、電極の全てが円弧状の電極で構成させた場合には、リニアリティが特に保たれるため、抵抗膜式タッチパネル装置１に入力した内容を好適に表示させることができる。 In the case where all the electrodes are composed of dot-like electrodes, as shown in FIG. 6A, the letters (alphabet letters) are displayed in a bent shape, and the figure “」 ”is also displayed as a figure“ □ ”. In the case where the electrode is composed of a dot-like electrode and an arc-like electrode, as shown in FIG. 6B, the letters (alphabet) are displayed in a curved shape, and a part of the figure “◎” is a figure “□”. Although it was displayed, it was displayed in the shape of “◎” on the arc-shaped electrode side. When all of the electrodes are composed of arcuate electrodes, they are displayed as input as shown in FIG. 6C.
As described above, when all the electrodes are arc-shaped electrodes, the linearity is particularly maintained, so that the content input to the resistive touch panel device 1 can be suitably displayed.
　［他の実施形態］
　本実施形態に係る抵抗膜式タッチパネル装置１の４つの電極は、いずれも中心角を９０度とする円弧状の電極である。これにより、上部電極部１１と下部電極部２１とを重ね合わせたときに、４つの電極がいずれも重なることなく、かつ隙間なく環状にすっきりと配置されることとなる。しかしながら、円弧状の電極の中心角は９０度に限定されず、図７Ａ～Ｄに示すように、様々な角度の中心角で構成することができる。 [Other Embodiments]
The four electrodes of the resistive touch panel device 1 according to the present embodiment are all arc-shaped electrodes having a central angle of 90 degrees. Thereby, when the upper electrode part 11 and the lower electrode part 21 are overlapped, the four electrodes do not overlap all at all, and are neatly arranged in an annular shape without a gap. However, the central angle of the arc-shaped electrode is not limited to 90 degrees, and can be configured with various central angles as shown in FIGS. 7A to 7D.
　図７Ａ～Ｄは、抵抗膜式タッチパネル装置１の電極の形状が円弧状のみの場合の例を示す図であり、図７Ａは円弧状の電極の中心角が９０度である場合を示す図、図７Ｂは円弧状の電極の中心角が１２０度である場合を示す図、図７Ｃは円弧状の電極の中心角が１５０度である場合を示す図、図７Ｄは円弧状の電極の中心角が１７０度である場合を示す図である。 7A to 7D are diagrams illustrating an example in which the electrode shape of the resistive touch panel device 1 is only an arc shape, and FIG. 7A is a diagram illustrating a case where the center angle of the arc electrode is 90 degrees. 7B is a diagram showing a case where the center angle of the arc-shaped electrode is 120 degrees, FIG. 7C is a diagram showing a case where the center angle of the arc-shaped electrode is 150 degrees, and FIG. 7D is a center angle of the arc-shaped electrode. It is a figure which shows the case where is 170 degree | times.
　円弧状の電極の中心角が異なる図７Ａ～Ｄに示す抵抗膜式タッチパネル装置１のそれぞれについて、上述の電圧マッピングを作成したところ、円弧状の電極の中心角が９０度である場合に最もリニアリティを保つことがわかった。これは、円弧状の電極の中心角が１８０度に近くなるほど（中心角が大きくなるほど）、対向する電極間の抵抗値が下がり、消費電流が上昇するからであると推定される。 When the above-described voltage mapping is created for each of the resistive touch panel devices 1 shown in FIGS. 7A to 7D with different arc-shaped electrode center angles, the most linearity is obtained when the arc-shaped electrode center angle is 90 degrees. I found out that This is presumably because the resistance value between the opposing electrodes decreases and the current consumption increases as the center angle of the arcuate electrode approaches 180 degrees (the center angle increases).
　以上、本発明の一実施形態について説明したが、本発明は、上述の実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。また、本発明に係る要旨を逸脱しない範囲内であれば種々の変更を施してもよい。 Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention. It is. Further, various modifications may be made within the scope not departing from the gist of the present invention.
　例えば、上述の実施形態は、円弧状の電極の中心角の大きさが９０度～１７０度であるが、円弧状の電極の中心角の大きさは、この範囲に限定されない。中心角の大きさが９０度未満であってもよいし、１７０度よりも大きくてもよい。 For example, in the above-described embodiment, the size of the central angle of the arc-shaped electrode is 90 to 170 degrees, but the size of the central angle of the arc-shaped electrode is not limited to this range. The central angle may be less than 90 degrees or greater than 170 degrees.
　以上まとめると、本発明が適用される抵抗膜式タッチパネル装置は、次のような構成を取れば足り、各種各様な実施形態を取ることができる。
　即ち、本発明が適用される抵抗膜式タッチパネル装置（例えば図１Ａ及びＢの抵抗膜式タッチパネル装置１）は、
　Ｘ座標回路（例えば図１ＢのＸ座標回路１００）が形成された円形又は略円形の上部導電膜（例えば図１Ｂの上部導電膜１０２）を有する上部電極部（例えば図１Ａ及びＢの上部電極部１１）と、Ｙ座標回路（例えば図１ＢのＹ座標回路２００）が形成された円形又は略円形の下部導電膜（例えば図１Ｂの下部導電膜２０２）を有する下部電極部（例えば図１Ａ及びＢの下部電極部２１）とが対向するように配置された、アナログ方式の抵抗膜式タッチパネル装置であって、
　前記Ｘ座標回路１００及び前記Ｙ座標回路２００には、少なくとも１つの円弧状の電極を有する一対の電極（例えば図１Ａの電極１１１及び１１２、電極２１１及び２１２）がそれぞれ含まれる。
　これにより、上部導電膜１０２及び下部導電膜２０２は、形状が円形又は略円形であり、Ｘ座標回路１００及びＹ座標回路２００には、円弧状の電極１１１及び１１２と，電極２１１及び２１２とがそれぞれ含まれるので、リニアリティが保たれた円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することができる。 In summary, the resistive touch panel device to which the present invention is applied only needs to have the following configuration, and can take various embodiments.
That is, the resistive touch panel device to which the present invention is applied (for example, the resistive touch panel device 1 in FIGS. 1A and 1B)
An upper electrode portion (for example, the upper electrode portion in FIGS. 1A and 1B) having a circular or substantially circular upper conductive film (for example, the upper conductive film 102 in FIG. 1B) on which an X coordinate circuit (for example, the X coordinate circuit 100 in FIG. 1B) is formed. 11) and a lower electrode portion (for example, FIGS. 1A and B) having a circular or substantially circular lower conductive film (for example, the lower conductive film 202 of FIG. 1B) in which a Y coordinate circuit (for example, the Y coordinate circuit 200 of FIG. 1B) is formed. Of the analog type resistive touch panel device, which is arranged so as to face the lower electrode portion 21),
The X coordinate circuit 100 and the Y coordinate circuit 200 include a pair of electrodes (for example, the electrodes 111 and 112 and the electrodes 211 and 212 in FIG. 1A) each having at least one arc-shaped electrode.
Accordingly, the upper conductive film 102 and the lower conductive film 202 are circular or substantially circular in shape, and the X coordinate circuit 100 and the Y coordinate circuit 200 include arc-shaped electrodes 111 and 112 and electrodes 211 and 212. Since each of them is included, it is possible to provide a circular or substantially circular analog resistive film type touch panel device in which linearity is maintained.
　また、本発明に係る抵抗膜式タッチパネル装置において、前記Ｘ座標回路１００と前記Ｙ座標回路２００とが直交することで座標軸が形成される、ことが好ましい。
　これにより、Ｘ座標回路１００とＹ座標回路２００とが直交することで座標軸が形成されるので、リニアリティがより保たれた円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することができる。 In the resistive touch panel device according to the present invention, it is preferable that the coordinate axis is formed by the X coordinate circuit 100 and the Y coordinate circuit 200 being orthogonal to each other.
Thereby, since the coordinate axis is formed by the X coordinate circuit 100 and the Y coordinate circuit 200 being orthogonal to each other, it is possible to provide a circular or substantially circular analog resistive film type touch panel device with further maintained linearity. .
　また、本発明に係る抵抗膜式タッチパネル装置において、前記円弧状の電極の中心角が９０度～１７０度である、ことが好ましい。
　これにより、円弧状の電極の中心角が９０度～１７０度で構成されているので、要求されるリニアリティに応じた、円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することができる。 In the resistive touch panel device according to the present invention, it is preferable that a center angle of the arc-shaped electrode is 90 degrees to 170 degrees.
Thereby, since the center angle of the arc-shaped electrode is 90 ° to 170 °, it is possible to provide a circular or substantially circular analog resistive film type touch panel device according to the required linearity. .
　また、本発明に係る抵抗膜式タッチパネル装置において、理論出力電圧直線からの最大編位置と最大電圧との百分率によって求められる、リニアリティを示す値が、±１．５％である、ことが好ましい。
　これにより、リニアリティを示す値が、±１．５％で構成されているので、リニアリティがさらに保たれた、円形又は略円形のアナログ方式の抵抗膜式タッチパネル装置を提供することができる。 In the resistive touch panel device according to the present invention, it is preferable that a value indicating linearity, which is obtained by a percentage between the maximum knitting position and the maximum voltage from the theoretical output voltage line, is ± 1.5%.
Thereby, since the value which shows linearity is comprised in +/- 1.5%, the circular or substantially circular analog type resistive film type touch panel apparatus with which the linearity was further maintained can be provided.
　また、本発明に係る抵抗膜式タッチパネル装置において、前記上部電極部の外縁と前記下部電極部の外縁とは、折り曲げ可能な接合部（例えば図２Ａ～Ｃの接合部３１）によって一部が接合されており、前記接合部を折り曲げることにより、前記上部電極部と前記下部電極部とが重なり合い、対向するように配置される、ことが好ましい。
　これにより、上部電極部と下部電極部とを容易に重ね合わせて一体化させることができる。 In the resistive touch panel device according to the present invention, a part of the outer edge of the upper electrode part and the outer edge of the lower electrode part are joined by a bendable joint part (for example, the joint part 31 in FIGS. 2A to 2C). It is preferable that the upper electrode portion and the lower electrode portion are arranged so as to overlap and face each other by bending the joint portion.
Thereby, the upper electrode part and the lower electrode part can be easily overlapped and integrated.
　１・・・　抵抗膜式タッチパネル装置
　１１・・・　上部電極部
　２１・・・　下部電極部
　３１・・・　接合部
　１００・・・　Ｘ座標回路
　１０１・・・　上部電極板
　１０２・・・　上部導電膜
　１１１・・・　電極
　１１２・・・　電極
　２００・・・　Ｙ座標回路
　２０１・・・　下部電極板
　２０２・・・　下部導電膜
　２０３・・・　ドットスペーサ
　２１１・・・　電極
　２１２・・・　電極 DESCRIPTION OF SYMBOLS 1 ... Resistive film type touch panel apparatus 11 ... Upper electrode part 21 ... Lower electrode part 31 ... Joint part 100 ... X coordinate circuit 101 ... Upper electrode plate 102 ... Upper conductive film DESCRIPTION OF SYMBOLS 111 ... Electrode 112 ... Electrode 200 ... Y coordinate circuit 201 ... Lower electrode plate 202 ... Lower conductive film 203 ... Dot spacer 211 ... Electrode 212 ... Electrode

Claims (6)

  1. 　Ｘ座標回路が形成された円形又は略円形の上部導電膜を有する上部電極部と、Ｙ座標回路が形成された円形又は略円形の下部導電膜を有する下部電極部とが対向するように配置された、アナログ方式の抵抗膜式タッチパネル装置であって、
    　前記Ｘ座標回路及び前記Ｙ座標回路には、少なくとも１つの円弧状の電極を有する一対の電極がそれぞれ含まれる、
    　ことを特徴とする、抵抗膜式タッチパネル装置。     The upper electrode part having a circular or substantially circular upper conductive film in which the X coordinate circuit is formed and the lower electrode part having a circular or substantially circular lower conductive film in which the Y coordinate circuit is formed are arranged to face each other. In addition, an analog type resistive touch panel device,
    The X coordinate circuit and the Y coordinate circuit each include a pair of electrodes having at least one arc-shaped electrode.
    A resistive film type touch panel device.
  2. 　前記Ｘ座標回路の前記円弧状の電極の中央と前記上部導電膜の中心とを結ぶ直線と、前記Ｙ座標回路の前記円弧状の電極の中央と前記下部導電膜の中心とを結ぶ直線とが直交する、
    　請求項１に記載の抵抗膜式タッチパネル装置。     A straight line connecting the center of the arc-shaped electrode of the X coordinate circuit and the center of the upper conductive film, and a straight line connecting the center of the arc-shaped electrode of the Y coordinate circuit and the center of the lower conductive film. Orthogonal,
    The resistive touch panel device according to claim 1.
  3. 　前記円弧状の電極の中心角が９０度～１７０度である、
    　請求項１又は２に記載の抵抗膜式タッチパネル装置。     A central angle of the arc-shaped electrode is 90 degrees to 170 degrees;
    The resistive film type touch panel device according to claim 1.
  4. 　理論出力電圧直線からの最大編位置と最大電圧との百分率によって求められる、リニアリティを示す値が、±１．５％である、
    　請求項１～３のうちいずれか１項に記載の抵抗膜式タッチパネル装置。     The value indicating the linearity obtained by the percentage of the maximum knitting position and the maximum voltage from the theoretical output voltage straight line is ± 1.5%.
    The resistive film type touch panel device according to any one of claims 1 to 3.
  5. 　前記一対の電極の両方が前記円弧状の電極である、
    　請求項１～４のうちいずれか１項に記載の抵抗膜式タッチパネル装置。     Both of the pair of electrodes are the arc-shaped electrodes,
    The resistive touch panel device according to any one of claims 1 to 4.
  6. 　前記上部電極部の外縁と前記下部電極部の外縁とは、折り曲げ可能な接合部によって一部が接合されており、前記接合部を折り曲げることにより、前記上部電極部と前記下部電極部とが重なり合い、対向するように配置される、
    　請求項１～５のうちいずれか１項に記載の抵抗膜式タッチパネル装置。     A part of the outer edge of the upper electrode part and the outer edge of the lower electrode part are joined by a foldable joining part, and the upper electrode part and the lower electrode part overlap each other by bending the joining part. Arranged to face each other,
    The resistive film type touch panel device according to any one of claims 1 to 5.
PCT/JP2019/003224 2018-01-31 2019-01-30 Resistive film touch panel device WO2019151342A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019133464A (en) * 2018-01-31 2019-08-08 Ｎｋｋスイッチズ株式会社 Resistance film type touch panel device

Citations (3)

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Publication number Priority date Publication date Assignee Title
WO1992010823A1 (en) * 1990-12-07 1992-06-25 Asher David J Touch sensor and controller
JPH11143622A (en) * 1997-11-11 1999-05-28 Tokyo Cosmos Electric Co Ltd Position input device
JP2013171351A (en) * 2012-02-17 2013-09-02 Nlt Technologies Ltd Touch panel and display device with touch panel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010823A1 (en) * 1990-12-07 1992-06-25 Asher David J Touch sensor and controller
JPH11143622A (en) * 1997-11-11 1999-05-28 Tokyo Cosmos Electric Co Ltd Position input device
JP2013171351A (en) * 2012-02-17 2013-09-02 Nlt Technologies Ltd Touch panel and display device with touch panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019133464A (en) * 2018-01-31 2019-08-08 Ｎｋｋスイッチズ株式会社 Resistance film type touch panel device

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