JP2015166949A - Method of calibrating ttp (touch panel) coordinates - Google Patents

Abstract

When input correction is performed on a touch panel having a large individual difference in resistance value or effective potential ratio, the difference between target coordinates and detected coordinates becomes large, and calibration cannot be executed correctly. A calibration unit of an operation unit includes the following.・ Input multiple calibration coordinates. A relative comparison is made with previously input coordinate information when inputting calibration coordinates, and it is determined whether or not to proceed to the next step of calibration according to the result. [Selection] Figure 4

Description

  The present invention relates to a coordinate calibration method for converting physical coordinate data output from a TTP (touch panel) arranged corresponding to a screen such as an LCD into logical coordinate data corresponding to a position on a display screen and outputting the logical coordinate data.

  In general, electronic devices or systems that perform display using input means such as a touch panel are known. A user interface using an application capable of an intuitive input operation by touch input from a touch panel or the like has been developed.

  In an electronic device using touch input by such a touch panel or the like, there is a cause of misalignment due to user parallax, LCD and touch panel mounting tolerances, and the like. Due to this factor, a deviation (coordinate deviation) occurs between the target coordinates on the display screen and the detected coordinates when the target coordinates are accurately touch-input.

  In order to correct such a coordinate shift, a so-called calibration menu (hereinafter also referred to as a calibration function) is mounted on an electronic device or the like. Then, using this calibration menu, the user can correct the coordinate deviation (see Patent Document 1).

JP-A-10-116155

  In the conventional calibration, it was confirmed that the target coordinates exist within the range as shown in FIG. 7 in order to determine that the target coordinates are accurately touch-input when correcting the coordinate deviation.

  In such a method, depending on the device characteristic variation of the resistance value and effective potential ratio of the touch panel, the difference between the target coordinate and the detected coordinate becomes large, and the target coordinate protrudes outside the touch panel range as shown in FIG. Cannot be executed.

The configuration of the present invention includes the following in the calibration means of the operation unit.
・ Input multiple calibration coordinates.
・ When inputting the coordinates for calibration, perform relative comparison with the previously input coordinate information,
According to the result, it is determined whether or not to proceed to the next step of calibration.

  According to the present invention, accurate touch panel calibration can be executed regardless of variations in touch panel characteristics.

1 is a diagram illustrating an image processing apparatus (MFP) according to the present invention. It is a figure showing the touchscreen unit in the operation part of this invention. It is a flowchart showing the touchscreen calibration flow of this invention. It is a flowchart showing the flow of marker touch determination and coordinate value output in the touch panel calibration flow of the present invention. It is a figure which shows the marker display position of the touchscreen of this invention. It is a figure showing the detailed content of the marker position touch determination of this invention. It is a figure showing the relationship between the target coordinate when using a standard touch panel device, and a detection coordinate. It is a figure showing the relationship between a target coordinate and a detection coordinate when using the touch panel device with a large characteristic dispersion | variation.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an image processing system (MFP) 119 according to the present invention.

  A system control unit 100 controls the entire system. Reference numeral 101 denotes a scanner unit that reads image data, and reference numeral 102 denotes a printer unit that records image data that has been processed and output by a system control unit on a recording medium. Hereinafter, each internal structure is demonstrated.

  First, the internal configuration of the system control unit 100 will be described.

  Reference numeral 103 denotes a system controller that processes image data, and is connected to each of the following constituent elements through a general-purpose I / F or a unique I / F. The system controller 103 may be a general-purpose CPU or an SOC such as an ASIC. Further, a chip set in which functions such as an IO unit and an arithmetic processing unit are configured by a plurality of devices may be used.

  A sub-controller 104 is a controller that controls image processing and the like processed by the MFP. Similarly to the system controller 103, the sub-controller is not limited to a specific form, and may take various forms according to the system configuration requirements.

  Reference numeral 105 denotes a FLASH memory for holding a user program. Reference numeral 106 denotes an operation unit that accepts an operation from the user and displays a system status and information to the user. Reference numeral 107 denotes a work memory for temporarily holding a work area and image data of the system controller.

  Reference numeral 108 denotes an external I / F unit. When connected to a network environment such as a LAN, which is a general-purpose I / F, a screen for sending scan image data, print image data, and web browsing between this system and the network environment Data is received. Reference numeral 109 denotes an SRAM for holding information necessary for the system control unit 100 even when the power supply unit 112 is turned off, such as address information and counter information of an external device.

  Reference numeral 110 denotes a FAN control unit, and the system controller 103 electrically controls the rotation / stop of the FAN 113 and the amount of rotating air. Reference numeral 114 denotes a temperature sensor, which is used by the system controller 103 to detect the temperature of the apparatus. The main SW 111 is a SW that controls start / stop of the power supply of the system, and an output signal of the main SW 111 is input to the power supply unit 112. The power supply unit 112 supplies the night-time system power supply and the emergency night system power supply in the system control unit 100 according to the output signal from the main SW 111.

  Next, the internal configuration of the scanner unit is as follows. The scanner engine unit 114 reads a document and generates image data converted into an electrical signal. The scanner controller 115 is connected to the system controller 103 in the system control unit 100 via a command bus and a video bus that are unique I / Fs, and transmits image data and performs command communication with the system controller 103.

  Finally, the internal configuration of the printer unit 102 will be described. The printer controller 116 is connected to the system controller 103 in the system control unit 100 via command buses and video buses that are unique I / Fs, and receives image data and performs command communication with the system controller 103.

  The printer controller 116 issues a sleep return request to the system controller 103 using a sleep return signal in accordance with the state of the printer engine unit. A printer engine unit 117 records image data transmitted from the system control unit 100 to the printer controller 116 on a recording medium.

  FIG. 2 shows the configuration of the touch panel unit in the operation unit 106. Reference numeral 201 denotes a touch panel composed of two resistive films. One resistive film has electrodes YT and YB, and the other resistive film has electrodes XR and XL. The electrodes YT, YB, XR, XL are connected to the input terminals 1, 3, 4, 2 of the touch panel control circuit 202. The touch panel control circuit 202 calculates coordinate values touched by the operator based on signal values input to the terminals 1 to 4.

Next, the calibration flow of the touch panel will be described with reference to FIG.
The transition to the calibration mode is executed when the operator presses a button displayed on the operation unit 106.

  In S <b> 301, the operation unit 106 calculates a touch coordinate value by the touch panel control circuit 202 and outputs it to the system controller 103.

  If it is determined in S302 that the touch coordinate value is in the adjustment mode button area, the process proceeds to S303. Otherwise, the process ends without entering the calibration flow. When the mode is shifted to the adjustment mode and adjustment is performed, the process proceeds to S304.

  In S304, an adjustment marker is displayed to prompt the operator to touch the touch panel. When the marker touch determination and the touch determination are performed at predetermined time intervals, coordinate value output is executed, and the process proceeds to S305. Details of S304 will be described later.

  In S305, it is determined whether or not the coordinate values of all marks necessary for calibration have been output. If all coordinate output has not been completed, the process returns to S304 and the coordinate value output is continued. When the output of all coordinates is completed, the process proceeds to S306.

  In step S <b> 306, the system controller 103 that has received all the coordinates calculates a calibration correction value that associates the coordinates on the display screen with the coordinates of the touch panel based on the received coordinate values.

  FIG. 4 is a detailed flow of marker touch determination and coordinate value output. When the process proceeds to the marker touch determination process in 304 of FIG. 3, an adjustment marker is displayed in S401. The adjustment markers are as shown in FIG. 5 and are displayed one by one in the order from (1) to (1) to (9).

  In S402, first, a 10 ms wait is entered in order to output coordinate values at predetermined intervals, and the process proceeds to S403. In S403, the Y coordinate is calculated based on the values of the electrodes YT and YB, and the process proceeds to S403. In S404, the X coordinate is calculated based on the values of the electrodes XR and XL, and the process proceeds to S405. In S405, the touch pressure when the operator presses the touch panel is calculated based on the values of the electrodes YT, YB, XR, and XL, and the process proceeds to S406. In S406, based on the values of the electrodes YT, YB, XR, XL, it is determined whether the operator has pressed the touch panel, and the process proceeds to S407.

  In S407, it is determined whether the touch pressure calculated in S405 is greater than a predetermined threshold value. If it is larger than the threshold value, it is determined that the operator has touched the touch panel with intention, and the process proceeds to S408. If not, the process returns to S402 without executing the subsequent steps until coordinate output, and it is determined again whether or not the operator has touched the touch panel.

  In S408, since there is a possibility of erroneous determination that the operator has touched with intention by chattering of the touch panel or the like, the possibility is determined. After determining the touch pressure in S405, the touch determination is performed again. For touch determination, the same touch pressure may be calculated as in S405, or simple determination using any two of YT, YB, XT, and XL may be used.

  If the malfunction due to chattering or the like in S408, that is, the touch determination is No, the process returns to S402, and it is determined again whether the operator touches the touch panel from the beginning. If the operator intentionally touches the touch panel, that is, if the touch determination is Yes, the process proceeds to S409, where it is determined whether the coordinates calculated in S403, 404 correctly touch the marker area.

  In S409, it is determined whether or not the X coordinates / Y coordinates calculated in S403 and 404 are coordinate values when the markers (1) to (9) are pressed in order. Specifically, the determination is performed based on the relative positional relationship with respect to the marker coordinates that have been pressed so far, using the logic shown in FIG. If it is determined that the coordinates of the currently pressed position are correctly pressing the marker, the process proceeds to S410. If the operator accidentally touches the touch panel or detects an incorrect touch input, such as hitting an object, it is determined that the marker has not been pressed correctly, and the process returns to S402 and whether the operator touches the touch panel again. The determination of whether or not is redone from the beginning.

  By determining whether or not the marker coordinates in S409 are correctly pressed, it becomes possible to prevent calibration errors due to unnecessary work mistakes.

100 System Control Unit 101 Scanner Unit 102 Printer Unit

Claims (3)

An image processing apparatus including an operation unit for an operator to determine control of the apparatus,
Calibration means for correcting the coordinate position operated by the operator and the coordinate position of the real screen,
The calibration means displays two or more markers for calculating correction values, calculates coordinate values when the operator presses the markers, and executes calibration. An image processing apparatus comprising means for comparing relative positions of the marker and marker coordinates. The image processing apparatus according to claim 1, wherein the calibration unit determines whether or not to proceed to a next calibration step according to a comparison result of the relative position comparison unit. The relative position comparing means determines that the markers have been pressed in order from the upper / lower magnitude relationship and the left / right magnitude relationship of the coordinate positions of two or more markers. Image processing device.