JP2011145752A - Input device and input method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an input device equipped with an region-segmentation analog touch panel that prevents ghost coordinates from being detected as touch point coordinates when a user touches three points simultaneously. <P>SOLUTION: When the coordinates of a touch point detected in a k-th (k=1, 2, 3, 4) area are defined as (Xk, Yk), an input device determines touch point coordinates (X1, Y1) as ghost coordinates when ¾X1-X2¾<DIFF and ¾Y1-Y3¾<DIFF are satisfied, determines touch point coordinates (X2, Y2) as ghost coordinates when ¾X2-X1<DIFF and ¾Y2-Y4¾<DIFF are satisfied, determines touch point coordinates (X3, Y3) as ghost coordinates when ¾X3-X4¾<DIFF and ¾Y3-Y1¾<DIFF are satisfied, and determines touch point coordinates (X4, Y4) as ghost coordinates when ¾X4-X3¾<DIFF and ¾Y4-Y2¾<DIFF are satisfied. The DIFF is a predetermined value of 0 or greater. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an input device including a touch panel and an input method applied to the input device, and more particularly to an input device including an area-divided analog touch panel and an input method applied to the input device.

  The area-divided analog touch panel includes a plurality of first resistance films arranged in a first direction and a plurality of second resistance films arranged in a second direction orthogonal to the first direction, A plane including a plurality of first resistance films and a plane including the plurality of second resistance films are opposed to each other, and one opposing region between the first resistance film and the second resistance film One is a divided area.

  Here, a four-divided analog touch panel, which is an example of an area-divided analog touch panel, and an input method applied to an input device including the four-divided analog touch panel will be described. The quadrant analog touch panel is disclosed in, for example, Patent Document 1 and Patent Document 2.

  FIG. 4 shows a schematic configuration of the quadrant analog touch panel. The quadrant analog touch panel shown in FIG. 4 includes resistance films WY1 and WY2 arranged side by side in the X-axis direction and resistance films WX1 and WX2 arranged side by side in the Y-axis direction. Electrodes Y1U and Y1D are provided at both ends in the Y-axis direction of the resistance film WY1, electrodes Y2U and Y2D are provided at both ends in the Y-axis direction of the resistance film WY2, and electrodes X1L and X1R are provided at both ends in the X-axis direction of the resistance film WX1. And the electrodes X2L and X2R are provided at both ends of the resistance film WX2 in the X-axis direction. The opposing region between the resistive film WX1 and the resistive film WY1 is a first region, the opposing region between the resistive film WX1 and the resistive film WY2 is a second region, and the opposing region between the resistive film WX2 and the resistive film WY1 is a third region. A region where the resistance film WX2 and the resistance film WY2 face each other is a fourth region.

  When detecting the contact point X coordinate of the first region, a predetermined voltage is applied between the electrodes X1L and X1R provided at both ends of the resistance film WX1, and the A / V of the voltage generated in the resistance film WY1 is detected. A D conversion value is acquired, and a contact point X coordinate of the first region is detected based on the acquired A / D conversion value. An equivalent circuit of the quadrant analog touch panel at this time is shown in FIG. A symbol P in FIG. 5A indicates a contact point. At the contact point P, the resistance film WX1 and the resistance film WY1 are short-circuited.

  When detecting the contact point Y coordinate of the first region, a predetermined voltage is applied between the electrodes Y1U and Y1D provided at both ends of the resistance film WY1, and the voltage generated in the resistance film WX1 is detected. An A / D conversion value is acquired, and the contact point Y coordinate of the first region is detected based on the acquired A / D conversion value. An equivalent circuit of the quadrant analog touch panel at this time is shown in FIG. A symbol P in FIG. 5B indicates a contact point. At the contact point P, the resistance film WY1 and the resistance film WX1 are short-circuited.

  Detection of contact point coordinates in the second to fourth regions is the same as detection of contact point coordinates in the first region. That is, when detecting the contact point X coordinate of the second region, a predetermined voltage is applied between the electrodes X1L and X1R provided at both ends of the resistance film WX1, and the voltage generated in the resistance film WY2 is detected. When the A / D conversion value is acquired, the contact point X coordinate of the second region is detected based on the acquired A / D conversion value, and the contact point Y coordinate of the second region is detected, both ends of the resistance film WY2 A predetermined voltage is applied between the electrode Y2U and the electrode Y2D provided in the electrode, and an A / D conversion value of the voltage generated in the resistance film WX1 is acquired. Based on the acquired A / D conversion value When detecting the contact point Y coordinate of the second region and detecting the contact point X coordinate of the third region, a predetermined voltage is applied between the electrode X2L and the electrode X2R provided at both ends of the resistance film WX2, An A / D conversion value of the voltage generated in the resistance film WY1 is obtained and When the contact point X coordinate of the third region is detected based on the acquired A / D conversion value and the contact point Y coordinate of the third region is detected, the electrode Y1U and the electrode Y1D provided at both ends of the resistance film WY1 A predetermined voltage is applied to obtain the A / D conversion value of the voltage generated in the resistance film WX2, and the contact point Y coordinate of the third region is detected based on the obtained A / D conversion value When the contact point X coordinate of the fourth region is detected, a predetermined voltage is applied between the electrodes X2L and X2R provided at both ends of the resistance film WX2, and the voltage generated in the resistance film WY2 is detected. When the A / D conversion value is acquired, the contact point X coordinate of the fourth region is detected based on the acquired A / D conversion value, and the contact point Y coordinate of the fourth region is detected, both ends of the resistance film WY2 A predetermined voltage is applied between the electrodes Y2U and Y2D provided in the Get the A / D converted value of the voltage developed on the film WX2, detects a contact point Y coordinate of the fourth region based on the acquired A / D conversion value.

JP-A-11-161425 Japanese Patent Laid-Open No. 9-45184

  Here, three points of the point A (Xa, Ya) in the first region, the point B (Xb, Yb) in the third region, and the point C (Xc, Yc) in the fourth region are input simultaneously. The case where the contact point Y coordinate of the second region is detected in the state of being pressed (pressed) will be described with reference to FIG. Note that the three-point simultaneous input occurs when the user touches three soft keys that are respectively allocated and displayed in three areas of the four-divided analog touch panel.

  Since the contact point Y coordinate of the second region is detected, a predetermined voltage is applied between the electrode Y2U and the electrode Y2D provided at both ends of the resistance film WY2, and the A / V of the voltage generated in the resistance film WX1 is detected. The D conversion value is acquired, and the contact point Y coordinate of the second region is detected based on the acquired A / D conversion value. Since the point C is input, the resistance film WY2 and the resistance film WX2 are in contact with each other at the point C, and a voltage substantially the same as the resistance voltage division at the point C of the resistance film WY2 is generated in the resistance film WX2. Further, since the point B is input, the resistance film WX2 and the resistance film WY1 are in contact at the point B, and a voltage substantially the same as the voltage of the resistance film WX2 is generated in the resistance film WY1. Further, since the point A is input, the resistance film WY1 and the resistance film WX1 are in contact at the point A, and a voltage substantially the same as the voltage of the resistance film WY1 is generated in the resistance film WX1. Therefore, a voltage substantially the same as the resistance voltage division at the point C of the resistance film WY2 is generated in the resistance film WX1. For this reason, when the A / D conversion value of the voltage generated in the resistance film WX1 is acquired and the contact point Y coordinate of the second region is detected based on the acquired A / D conversion value, the detected coordinate is a point. It is almost equal to the Y coordinate (Yc) of C. 5 indicates the flow of resistance partial pressure (transmission path) at point C of the resistance film WY2.

  Similarly, a point A (Xa, Ya) in the first region, a point B (Xb, Yb) in the third region, and a point C (Xc, Yc) in the fourth region are input simultaneously. When the X coordinate (Xa) of the point A is detected when the contact point X coordinate of the second region is detected in the state of being pressed (pressed).

  Thus, the three points of the point A (Xa, Ya) in the first region, the point B (Xb, Yb) in the third region, and the point C (Xc, Yc) in the fourth region are input simultaneously. Then, as shown in FIG. 7, in the contact point coordinate detection of the second region, there is a problem that ghost coordinates G (Xa, Yc) that are not input are detected as the contact point coordinates.

  In view of the above situation, the present invention is applied to an input device including an area-divided analog touch panel that is unlikely to detect ghost coordinates as contact point coordinates when three-point simultaneous input is performed, and the input device. The purpose is to provide an input method.

  In order to achieve the above object, an input device according to the present invention includes a plurality of first resistance films arranged in a first direction and a plurality of sheets arranged in a second direction orthogonal to the first direction. A plane including the plurality of first resistance films and a plane including the plurality of second resistance films are opposed to each other, wherein the first resistance film and the second resistance film An area-divided analog touch panel in which each facing area with the resistive film is divided, and a contact point coordinate detection process for controlling the area-divided analog touch panel to detect a contact point coordinate of the facing area An input device including a controller for each of the opposing areas, and the controller makes the following determination.

  The controller is a first region that is one of opposing regions of the first resistive film and the second resistive film, and is one of opposing regions of the first resistive film and the second resistive film, A second region adjacent to the first region in the first direction; one of the opposing regions of the first resistance film and the second resistance film; and adjacent to the first region in the second direction. A third region that is adjacent to the second region in the second direction and the third region in the first direction. When the contact point coordinates are detected one by one in the contact point coordinate detection process of each of the fourth areas adjacent to the area, the first of the contact point coordinates detected in the contact point coordinate detection process of the first area. A coordinate value of the first direction of the contact point coordinates detected by the coordinate value of the direction and the contact point coordinate detection process of the second region; The difference between the contact point coordinates detected by the contact point coordinate detection process of the first area and the contact point coordinates detected by the contact point coordinate detection process of the third area is smaller than a predetermined value. When the difference from the coordinate value in the second direction is smaller than a predetermined value, the controller determines that the contact point coordinates detected in the contact point coordinate detection process of the first region are ghost coordinates and invalidates them.

  Similarly, in the above case, the coordinate value in the first direction of the contact point coordinates detected in the contact point coordinate detection process of the second area and the contact point coordinates detected in the contact point coordinate detection process of the first area The difference between the coordinate value in the first direction and the coordinate value in the second direction of the contact point coordinates detected by the contact point coordinate detection processing in the second region and the contact point in the fourth region is smaller than a predetermined value. When the difference between the contact point coordinates detected in the coordinate detection process and the coordinate value in the second direction is smaller than a predetermined value, the controller determines the contact point coordinates detected in the contact point coordinate detection process of the second region. Judged as ghost coordinates and invalidated.

  Similarly, in the above case, the coordinate value in the first direction of the contact point coordinates detected by the contact point coordinate detection process of the third area and the contact detected by the contact point coordinate detection process of the fourth area. The difference between the coordinate value in the first direction of the point coordinate is smaller than a predetermined value and the coordinate value in the second direction of the contact point coordinate detected by the contact point coordinate detection process in the third region and the first region When the difference between the contact point coordinates detected by the contact point coordinate detection process and the coordinate value in the second direction is smaller than a predetermined value, the controller detects the contact point detected by the contact point coordinate detection process of the third region. Judge coordinates as ghost coordinates and invalidate them.

  Similarly, in the above case, the coordinate value in the first direction of the contact point coordinates detected by the contact point coordinate detection process of the fourth area and the contact detected by the contact point coordinate detection process of the third area. The difference between the coordinate value in the first direction of the point coordinate is smaller than a predetermined value, and the coordinate value in the second direction of the contact point coordinate detected by the contact point coordinate detection process in the fourth region and the second region When the difference between the contact point coordinates detected in the contact point coordinate detection process and the coordinate value in the second direction is smaller than a predetermined value, the controller detects the contact detected in the contact point coordinate detection process of the fourth region. The point coordinate is determined to be ghost and invalid.

  In the input device having the above configuration, in the above case, the controller detects the contact point coordinates detected by the contact point coordinate detection process of the first region and the contact points detected by the contact point coordinate detection process of the second region. All of the point coordinates, the contact point coordinates detected in the contact point coordinate detection process of the third area, and the contact point coordinates detected in the contact point coordinate detection process of the fourth area were not determined as ghost coordinates. Sometimes, the controller detects the contact point coordinates detected by the contact point coordinate detection process of the first area, the contact point coordinates detected by the contact point coordinate detection process of the second area, and the contact point coordinates of the third area. It is desirable to invalidate all of the contact point coordinates detected by the detection process and the contact point coordinates detected by the contact point coordinate detection process of the fourth region.

  In order to achieve the above object, an input method according to the present invention includes a plurality of first resistance films arranged in a first direction and a plurality of arranged in a second direction orthogonal to the first direction. A plurality of second resistance films, and a plane including the plurality of first resistance films and a plane including the plurality of second resistance films are opposed to each other, the first resistance film and the An input method applied to an input device including a region-divided analog touch panel in which each region facing a second resistance film is a divided region, wherein the first resistance film, the second resistance film, A first region that is one of the opposing regions, and a second region that is one of the opposing regions of the first resistance film and the second resistance film and is adjacent to the first region in the first direction , One of opposing regions of the first resistance film and the second resistance film, and the second direction in the second direction A third region adjacent to one region, and one of the opposing regions of the first resistance film and the second resistance film, adjacent to the second region in the second direction and the first region; A confirmation step for confirming whether or not contact point coordinates are detected one by one in the contact point coordinate detection process for each of the fourth regions adjacent to the third region in the direction, and the first region in the confirmation step, Detected by the contact point coordinate detection process of the first area when it is confirmed that the contact point coordinates have been detected one by one by the contact point coordinate detection process of each of the second area, the third area, and the fourth area. A difference between the coordinate value in the first direction of the contact point coordinates and the coordinate value in the first direction of the contact point coordinates detected in the contact point coordinate detection process of the second region is smaller than a predetermined value and the first The first of the contact point coordinates detected in the contact point coordinate detection process of one area When the difference between the coordinate value in the direction and the coordinate value in the second direction of the contact point coordinate detected in the contact point coordinate detection process in the third area is smaller than a predetermined value, the contact point coordinate detection process in the first area A first ghost processing step that invalidates the contact point coordinates detected in step 1 as ghost coordinates, and in this case, the first direction of the contact point coordinates detected in the contact point coordinate detection process of the second region And the difference between the coordinate value in the first direction of the contact point coordinates detected in the contact point coordinate detection process of the first area is smaller than a predetermined value and detected in the contact point coordinate detection process of the second area When the difference between the coordinate value in the second direction of the contact point coordinates made and the coordinate value in the second direction of the contact point coordinates detected in the contact point coordinate detection process of the fourth region is smaller than a predetermined value, Detected by the contact point coordinate detection process of the second area A second ghost processing step in which the contact point coordinates are determined to be ghost coordinates and invalidated, and in the above case, the coordinate values in the first direction of the contact point coordinates detected in the contact point coordinate detection process of the third region; The contact point detected by the contact point coordinate detection process of the third region is smaller than a predetermined value of the contact point coordinate detected by the contact point coordinate detection processing of the fourth region and smaller than a predetermined value. When the difference between the coordinate value in the second direction of the coordinate and the coordinate value in the second direction of the contact point coordinate detected in the contact point coordinate detection process of the first region is smaller than a predetermined value, A third ghost processing step in which the contact point coordinates detected in the contact point coordinate detection process are determined to be invalid as ghost coordinates, and in this case, the contact point coordinates detected in the contact point coordinate detection process of the fourth region And the first direction coordinate value and the first direction The difference between the contact point coordinates detected in the contact point coordinate detection process of the area and the coordinate value in the first direction is smaller than a predetermined value, and the contact point coordinates detected in the contact point coordinate detection process of the fourth area are When the difference between the coordinate value in the second direction and the coordinate value in the second direction of the contact point coordinates detected in the contact point coordinate detection process in the second region is smaller than a predetermined value, the contact point coordinates in the fourth region A fourth ghost processing step for determining the contact point coordinates detected in the detection processing as ghost coordinates and invalidating the coordinates is provided.

  According to the present invention, in consideration of the generation principle of ghost coordinates generated at the time of three-point simultaneous input, the positional relationship between a certain contact point coordinate and a certain contact point coordinate is used to Since it is determined whether the contact point coordinates correspond to the ghost coordinates, there is no possibility of detecting the ghost coordinates as the contact point coordinates when three points are simultaneously input.

It is a figure which shows the example of schematic structure of the input device which concerns on one Embodiment of this invention. It is a flowchart which shows the detection operation | movement of the contact point coordinate of a 4-part dividing analog touch panel. It is a time chart of each part voltage in detection operation of a contact point coordinate of a four division analog touch panel. It is a figure which shows schematic structure of a 4 division | segmentation analog touch panel. It is a figure which shows the equivalent circuit of a 4 division | segmentation analog touch panel in the case of detecting the contact point coordinate of a 1st area | region. It is a figure which shows the mode of the ghost coordinate detection in a three-point simultaneous input state. It is a front view of the quadrant analog touch panel which shows the mode of the ghost coordinate detection in a three-point simultaneous input state.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a schematic configuration example of an input device according to an embodiment of the present invention.

  An input device according to an embodiment of the present invention shown in FIG. 1 includes a quadrant analog touch panel 1, a touch panel I / F (interface) circuit 2, a controller 3, a host I / F circuit 4, and an LED (Light Emitting). Diode) 5. The quadrant analog touch panel 1 is configured as shown in FIG. In addition, the controller 3 controls the four-part analog touch panel 1 via the touch panel I / F circuit 2, and inputs information input to the four-part analog touch panel 1 as an output report via the host I / F circuit 4. A controller that transfers the data to a host (not shown) and controls the LEDs 5 according to the state of the quadrant analog touch panel 1, for example, a microcomputer having a flash memory, a RAM, and a CPU can be used.

  Next, the contact point coordinate detection operation of the quadrant analog touch panel 1 performed by the input device according to the embodiment of the present invention shown in FIG. 1 will be described with reference to FIGS. FIG. 2 is a flowchart showing the operation of detecting the contact point coordinates of the quadrant analog touch panel 1, and FIG. 3 is a time chart of the voltage of each part during the operation of detecting the contact point coordinates of the quadrant analog touch panel 1. In FIG. 3, symbols Y1D, Y2D, X1R, and X2R indicate the voltage of the electrode Y1D, the voltage of the electrode Y2D, the voltage of the electrode X1R, and the voltage of the electrode X2R, respectively.

  The flowchart operation shown in FIG. 2 is executed for each transfer rate of the output report transferred from the controller 3 to the external host (not shown) via the host I / F circuit 4.

<Touch detection process>
First, a touch detection process is executed (step S10). The touch detection process is executed in a period T1 in FIG.

  In the period T1, the controller 3 applies 0V to the electrode X1L of the quadrant analog touch panel 1, opens the electrode X1R of the quadrant analog touch panel 1, applies 0V to the electrode X2L of the quadrant analog touch panel 1, and divides into four The electrode X2R of the analog touch panel 1 is opened, and further, 5V is applied to the electrodes Y1D and Y2D of the quadrant analog touch panel 1 and waits for the state of the quadrant analog touch panel 1 to be stabilized. When the user does not touch the quadrant analog touch panel 1, the state where the electrodes Y1D and Y2D of the quadrant analog touch panel 1 are 5V is maintained. On the other hand, when the user is touching the quadrant analog touch panel 1, at least one of the resistance films WY1 and WY2 of the quadrant analog touch panel 1 is at least one of the resistance films WX1 and WX2 of the quadrant analog touch panel 1. At least one of the electrodes Y1D and Y2D changes from 5V to 0V. 3 shows that the resistive film WY1 of the quadrant analog touch panel 1 is in contact with at least one of the resistive films WX1 and WX2 of the quadrant analog touch panel 1, and the resistive film WY2 of the quadrant analog touch panel 1 is the quadrant analog touch panel 1. A case in which at least one of the resistance films WX1 and WX2 is in contact is illustrated. In addition, since the electrode X1L of the quadrant analog touch panel 1 is 0V, the electrode X1R of the quadrant analog touch panel 1 in the open state becomes 0V as a result. Similarly, since the electrode X2L of the quadrant analog touch panel 1 is 0V, the electrode X2R of the quadrant analog touch panel 1 in the open state is eventually 0V.

<Touch detection determination process>
Next, a touch detection determination process is executed (step S20). The touch detection determination process is executed in a period T2 in FIG.

  In the period T2, the controller 3 performs the A / D conversion value of the voltage generated at the electrode Y1U of the quadrant analog touch panel 1 and the A / D conversion value of the voltage generated at the electrode Y2U of the quadrant analog touch panel 1. And detect. Note that the A / D conversion may be performed by either the quadrant analog touch panel 1 or the touch panel I / F circuit 2.

  The controller 3 determines that there is a touch if at least one of the two detected voltages is 2 V or less. The voltage value (2V) serving as a determination reference is stored as a parameter by the controller 3, and the setting can be changed.

  If it is determined that there is a touch in the touch detection determination process in step S20 (YES in step S20), the controller 3 turns on the LED 5 (step S30), and then executes the contact point coordinate detection process (step S40). The contact point coordinate detection process includes a contact point X coordinate detection process and a contact point Y coordinate detection process.

<Contact point X coordinate detection process>
In the period T3, the controller 3 applies 0V to the electrode X1L of the quadrant analog touch panel 1, applies 5V to the electrode X1R of the quadrant analog touch panel 1, and applies 0V to the electrodes Y1D and Y2D of the quadrant analog touch panel 1. To do. The length of the period T3 is stored as a parameter by the controller 3, and can be changed.

  In a period T4 following the period T3, the controller 3 opens the electrodes Y1U, Y2U, Y1D, and Y2D of the quadrant analog touch panel 1 and waits until the resistance films WY1 and WY2 of the quadrant analog touch panel 1 are stabilized. . The length of the period T4 is stored as a parameter by the controller 3, and the setting can be changed.

  In the period T5 following the period T4, the controller 3 acquires the A / D conversion value of the voltage generated at the electrode Y1D of the quadrant analog touch panel 1 four times, discards the maximum value and the minimum value, Add data. Similarly, the controller 3 acquires the A / D conversion value of the voltage generated at the electrode Y1U of the quadrant analog touch panel 1 four times, discards the maximum value and the minimum value, and adds the two intermediate data. Then, the controller 3 averages the two addition values (a value twice as large as the A / D conversion value) to obtain the contact point X coordinate of the first region.

  In the period T5, the controller 3 acquires the voltage generated at the electrode Y2D of the quadrant analog touch panel 1 four times, discards the maximum value and the minimum value, and adds the intermediate two data. Similarly, the controller 3 acquires the voltage generated at the electrode Y2U of the quadrant analog touch panel 1 four times, discards the maximum value and the minimum value, and adds the two pieces of intermediate data. Then, the controller 3 averages the two addition values (a value twice as large as the A / D conversion value), and sets the contact point X coordinate of the second region.

  In a period T6 following the period T5, the controller 3 performs a process in which the voltage applied to the electrodes X1L and X1R and the voltage applied to the electrodes X2L and X2R in the period T3 to the period T5 are exchanged. Thereby, the contact point X coordinate of the third region and the contact point X coordinate of the fourth region are obtained.

<Contact point Y coordinate detection process>
The contact point Y coordinate detection process is executed using the same method as the contact point X coordinate detection process.

  In a period T7 following the period T6, the controller 3 applies 0 V to the electrode Y1U of the quadrant analog touch panel 1, applies 5 V to the electrode Y1D of the quadrant analog touch panel 1, and the electrodes X1R and X2R of the quadrant analog touch panel 1 0V is applied to. The length of the period T7 is stored as a parameter by the controller 3, and the setting can be changed.

  In the period T8 following the period T7, the controller 3 opens the electrodes X1L, X2L, X1R, and X2R of the quadrant analog touch panel 1 and waits until the resistance films WX1 and WX2 of the quadrant analog touch panel 1 are stabilized. . The length of the period T8 is stored as a parameter by the controller 3, and the setting can be changed.

  In the period T9 following the period T8, the controller 3 acquires the A / D conversion value of the voltage generated at the electrode X1R of the quadrant analog touch panel 1 four times, discards the maximum value and the minimum value, Add data. Similarly, the controller 3 acquires the A / D conversion value of the voltage generated at the electrode X1L of the quadrant analog touch panel 1 four times, discards the maximum value and the minimum value, and adds the two intermediate data. Then, the controller 3 averages the two addition values (a value twice as large as the A / D conversion value), and sets it as the contact point Y coordinate of the first region.

  In the period T9, the controller 3 acquires the voltage generated at the electrode X2L of the quadrant analog touch panel 1 four times, discards the maximum value and the minimum value, and adds the two intermediate data. Similarly, the controller 3 acquires the voltage generated at the electrode X2L of the quadrant analog touch panel 1 four times, discards the maximum value and the minimum value, and adds the two pieces of intermediate data. Then, the controller 3 averages the two addition values (a value twice as large as the A / D conversion value), and sets the contact point Y coordinate of the third region.

  In the period T10 following the period T9, the controller 3 performs a process in which the voltage applied to the electrodes Y1U and Y1D and the voltage applied to the electrodes Y2U and Y2D in the period T7 to the period T9 are exchanged. Thereby, the contact point Y coordinate of the second region and the contact point Y coordinate of the fourth region are obtained.

  Thereafter, the controller 3 executes again the contact point X coordinate detection process and the contact point Y coordinate detection process described above (after the period T11 following the period T10). However, in the second contact point X-coordinate detection process and the contact point Y-coordinate detection process, an electrode that applies 0 V and an electrode that applies 5 V in the first contact point X-coordinate detection process and the contact point Y-coordinate detection process. Replace.

  A certain contact point coordinate obtained by the first contact point X coordinate detection process and the contact point Y coordinate detection process, and a certain contact obtained by the second contact point X coordinate detection process and the contact point Y coordinate detection process. If the ratio with the point coordinates is equal to or less than a preset threshold value, the controller 3 sets the state of the area corresponding to the certain contact point coordinates to “stable” and stores it. Also, a certain contact point coordinate obtained by the first contact point X coordinate detection process and the contact point Y coordinate detection process, and a second contact point X coordinate detection process and the contact point Y coordinate detection process. If the ratio to the contact point coordinates is not less than or equal to a preset threshold value, the controller 3 sets the state of the area corresponding to the certain contact point coordinates to “slightly unstable” and stores it. The controller 3 is obtained by only one of the first contact point X coordinate detection process and the contact point Y coordinate detection process, the second contact point X coordinate detection process, and the contact point Y coordinate detection process. The state of the area corresponding to the contact point coordinates is set to “unstable” and stored. Further, the controller 3 stores the state of the area where the contact point coordinates do not exist as “non-contact”.

  The controller 3 performs certain contact point coordinates obtained by the first contact point X coordinate detection process and the contact point Y coordinate detection process and the second contact point X coordinate detection process only for the region set as “stable”. And the contact point coordinate obtained by the contact point Y coordinate detection process is averaged and stored as the contact point coordinate.

  When the contact point coordinate detection process in step S40 described above ends, the process proceeds to step S70 described later.

  On the other hand, when it is not determined that there is a touch in the touch detection determination process in step S20 (NO in step S20), the controller 3 turns off the LED 5 (step S50), and then all the states of the first to fourth regions are changed. It is set and stored as “non-contact” (step S60), and the process proceeds to step S70 described later.

<Ghost processing>
In step S70, a ghost process is executed. In the ghost processing, the controller 3 confirms whether the number of contact point coordinates is less than 4 or 4, and if the number of contact point coordinates is less than 4, the controller 3 immediately proceeds to step S80 described later, and the contact point coordinates. If the number of ghosts is 4, ghost determination processing is executed. When the number of contact point coordinates is 4, the contact point coordinates are detected one by one in the contact point coordinate detection process for each of the first to fourth regions.

  In the ghost determination process, the controller 3 deletes the ghost coordinates from the contact point coordinates, sets the state of the area where the ghost coordinates are detected to “non-contact”, and stores it. That is, the contact point coordinates detected by the contact point coordinate detection process of the first region are (X1, Y1), the contact point coordinates detected by the contact point coordinate detection process of the second region are (X2, Y2), When the contact point coordinates detected in the third area contact point coordinate detection process are (X3, Y3) and the contact point coordinates detected in the fourth area contact point coordinate detection process are (X4, Y4), If the conditions | X1-X2 | <DIFF and | Y1-Y3 | <DIFF are satisfied, the contact point coordinates (X1, Y1) are determined to be ghost coordinates and invalid (deleted from the contact point coordinates). Reset the state to “Non-contact”, and if the condition | X2-X1 | <DIFF and | Y2-Y4 | <DIFF is satisfied, the contact point coordinates (X2, Y2) are judged as ghost coordinates and invalid (contact (Removed from the point coordinates) and reset the state of the second area to "non-contact" If the conditions | X3-X4 | <DIFF and | Y3-Y1 | <DIFF are satisfied, the contact point coordinates (X3, Y3) are determined to be ghost coordinates and invalid (deleted from the contact point coordinates). Reset the state to “Non-contact” and if the condition of | X4-X3 | <DIFF and | Y4-Y2 | <DIFF is satisfied, the contact point coordinates (X4, Y4) are judged as ghost coordinates and invalid (contact Delete the point coordinates) and reset the state of the fourth area to “non-contact”. Note that DIFF is a predetermined value greater than zero. The reason why DIFF is set to a predetermined value larger than 0 is that when ghost coordinates are generated, the voltage can be maintained at a constant value due to the influence of noise or the like in the voltage flow (transmission path) (see the dotted arrow in FIG. 6). This is not always true. Further, the predetermined value DIFF may be the same value in each conditional expression, or may be set to a value different from others in a part of each conditional expression, or may be set to a different value in each conditional expression. Good.

  When the number of contact point coordinates is 4 and no ghost coordinates are found in the ghost determination process, the controller 3 inputs four points simultaneously so that one contact point exists in each of the first to fourth regions. It is determined that it has been made, all the contact point coordinates are invalidated, and the states of the first to fourth areas are all set to “non-contact” and stored. The reason for performing such processing is that when four points are simultaneously input so that there is one contact point in each of the first to fourth regions, current flows in, and all the first to fourth regions This is because the accurate coordinate value of the contact point cannot be obtained.

<Coordinate stabilization judgment>
In step S80 following step S70, a coordinate stabilization determination is executed. In the processing up to step S70, the state of each of the first to fourth regions is determined as one of “stable”, “slightly unstable”, “unstable”, and “non-contact”.

  In the coordinate stabilization determination, the controller 3 determines that the “slightly unstable” or “unstable” region is “unstable” and stores the determination result. Further, in the coordinate stabilization determination, the controller 3 determines that the “non-contact” area is “non-contact” and stores the determination result. In the coordinate stabilization determination, the controller 3 refers to the state in the previous flow process of the area for the “stable” area, and if the state in the previous flow process is not “stable”. If it is determined that the contact is “first contact” and the state in the previous flow process is also “stable”, it is determined that “contact is continuing”, and the determination result is stored.

<Output report generation>
In step S90 following step S80, an output report is generated. The generated output report is transferred to an external host (not shown) via the host I / F circuit 4.

  The controller 3 determines, based on the determination result in step S80 and the value of the contact point coordinates if the contact point coordinates exist, “a state where the four-part analog touch panel 1 is touched” and “a touch on the four-part analog touch panel 1 is performed. Decide whether the state is "released", "contact point coordinates have moved more than a predetermined distance", or "contact point coordinates have moved less than a predetermined distance and have remained for more than a predetermined time" The determined content is used as an output report. If the contact point coordinates exist, the value of the contact point coordinates is also included in the output report.

  As mentioned above, although embodiment which concerns on this invention was described, the range of this invention is not limited to this, A various change can be added and implemented in the range which does not deviate from the main point of invention. For example, the detected contact point coordinates may not be output to the host side as they are, but may be output to the host side after correcting the detected contact point coordinates.

1 Quadruple analog touch panel 2 Touch panel I / F circuit 3 Controller 4 Host I / F circuit 5 LED

Claims (3)

A plurality of first resistance films arranged side by side in a first direction; and a plurality of second resistance films arranged side by side in a second direction orthogonal to the first direction. A plane including a resistive film and a plane including the plurality of second resistive films are opposed to each other, and each of the opposing areas of the first resistive film and the second resistive film is divided; An area-divided analog touch panel,
An input device comprising: a controller that controls the area-divided analog touch panel to detect contact point coordinates of the opposing area for each of the opposing areas;
The controller is a first region that is one of opposing regions of the first resistive film and the second resistive film, and is one of opposing regions of the first resistive film and the second resistive film, A second region adjacent to the first region in the first direction; one of the opposing regions of the first resistance film and the second resistance film; and adjacent to the first region in the second direction. A third region that is adjacent to the second region in the second direction and the third region in the first direction. When the contact point coordinates are detected one by one in the contact point coordinate detection process for each of the fourth areas adjacent to the area,
The coordinate values in the first direction of the contact point coordinates detected in the contact point coordinate detection process of the first area and the coordinates in the first direction of the contact point coordinates detected in the contact point coordinate detection process of the second area The difference between the values is smaller than a predetermined value, and the coordinate values in the second direction of the contact point coordinates detected by the contact point coordinate detection process of the first area and the contact point coordinate detection process of the third area are detected. When the difference between the contact point coordinates and the coordinate value in the second direction is smaller than a predetermined value, the controller determines that the contact point coordinates detected in the contact point coordinate detection process of the first region are ghost coordinates and is invalid. age,
In the above case,
The coordinate value in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the second area and the coordinate in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the first area The difference between the values is smaller than a predetermined value, and the coordinate values in the second direction of the contact point coordinates detected in the contact point coordinate detection process of the second area and the contact point coordinate detection process of the fourth area are detected. When the difference between the contact point coordinates and the coordinate value in the second direction is smaller than a predetermined value, the controller determines that the contact point coordinates detected in the contact point coordinate detection process of the second area are ghost coordinates and is invalid. age,
In the above case,
The coordinate value in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the third area and the coordinate in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the fourth area The difference between the values is smaller than a predetermined value, and the coordinate values in the second direction of the contact point coordinates detected by the contact point coordinate detection process of the third region and the contact point coordinate detection process of the first region are detected. When the difference between the contact point coordinates and the coordinate value in the second direction is smaller than a predetermined value, the controller determines that the contact point coordinates detected in the contact point coordinate detection process of the third region are ghost coordinates and is invalid. age,
In the above case,
The coordinate value in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the fourth area and the coordinate in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the third area The difference between the values is smaller than a predetermined value, and the coordinate values in the second direction of the contact point coordinates detected by the contact point coordinate detection process of the fourth area and the contact point coordinates detection process of the second area are detected. When the difference between the contact point coordinates and the coordinate value in the second direction is smaller than a predetermined value, the controller determines that the contact point coordinates detected in the contact point coordinate detection process of the fourth area are ghost coordinates and is invalid. An input device characterized by that. In the above case,
The controller detects the contact point coordinates detected by the contact point coordinate detection process of the first area, the contact point coordinates detected by the contact point coordinate detection process of the second area, and the contact point coordinate detection process of the third area When the contact point coordinates detected in step 4 and the contact point coordinates detected in the contact point coordinate detection process of the fourth area are not all determined as ghost coordinates,
The controller detects the contact point coordinates detected by the contact point coordinate detection process of the first area, the contact point coordinates detected by the contact point coordinate detection process of the second area, and the contact point coordinate detection process of the third area 2. The input device according to claim 1, wherein all of the contact point coordinates detected in step 4 and the contact point coordinates detected in the contact point coordinate detection process of the fourth region are invalidated. A plurality of first resistance films arranged side by side in a first direction; and a plurality of second resistance films arranged side by side in a second direction orthogonal to the first direction. A plane including a resistive film and a plane including the plurality of second resistive films are opposed to each other, and each of the opposing areas of the first resistive film and the second resistive film is divided; An input method applied to an input device including an area-divided analog touch panel,
A first region that is one of opposing regions between the first resistance film and the second resistance film; and one of opposing regions between the first resistance film and the second resistance film in the first direction. A second region adjacent to the first region; a third region adjacent to the first region in the second direction and one of the opposing regions of the first resistance film and the second resistance film; One of the regions and the opposing region of the first resistance film and the second resistance film, adjacent to the second region in the second direction and adjacent to the third region in the first direction. A confirmation step for confirming whether contact point coordinates are detected one by one in the contact point coordinate detection processing of each of the fourth regions,
When it is confirmed that the contact point coordinates are detected one by one in the contact point coordinate detection process of each of the first area, the second area, the third area, and the fourth area in the confirmation step,
The coordinate values in the first direction of the contact point coordinates detected in the contact point coordinate detection process of the first area and the coordinates in the first direction of the contact point coordinates detected in the contact point coordinate detection process of the second area The difference between the values is smaller than a predetermined value, and the coordinate values in the second direction of the contact point coordinates detected by the contact point coordinate detection process of the first area and the contact point coordinate detection process of the third area are detected. When the difference between the contact point coordinates and the coordinate value in the second direction is smaller than a predetermined value, the contact point coordinates detected by the contact point coordinate detection process of the first region are determined to be ghost coordinates and invalidated. A ghost processing step;
In the above case,
The coordinate value in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the second area and the coordinate in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the first area The difference between the values is smaller than a predetermined value, and the coordinate values in the second direction of the contact point coordinates detected in the contact point coordinate detection process of the second area and the contact point coordinate detection process of the fourth area are detected. When the difference between the contact point coordinates and the coordinate value in the second direction is smaller than a predetermined value, the contact point coordinates detected by the contact point coordinate detection process of the second region are determined as ghost coordinates and invalidated. A ghost processing step;
In the above case,
The coordinate value in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the third area and the coordinate in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the fourth area The difference between the values is smaller than a predetermined value, and the coordinate values in the second direction of the contact point coordinates detected by the contact point coordinate detection process of the third region and the contact point coordinate detection process of the first region are detected. When the difference between the contact point coordinates and the coordinate value in the second direction is smaller than a predetermined value, the contact point coordinates detected by the contact point coordinate detection process of the third region are determined as ghost coordinates and invalidated. A ghost processing step;
In the above case,
The coordinate value in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the fourth area and the coordinate in the first direction of the contact point coordinate detected in the contact point coordinate detection process of the third area The difference between the values is smaller than a predetermined value, and the coordinate values in the second direction of the contact point coordinates detected by the contact point coordinate detection process of the fourth area and the contact point coordinates detection process of the second area are detected. When the difference between the contact point coordinates and the coordinate value in the second direction is smaller than a predetermined value, the contact point coordinates detected by the contact point coordinate detection process of the fourth area are determined as ghost coordinates and invalidated. And a ghost processing step.

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