DISPLAY AND INPUT DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME

摘要

A display and input device includes a display section, touch screen section, control section, and storage section. The display section displays thereon a screen image including an operation element image. The touch screen section detects a touch position on the screen image. The control section detects a set of touch position coordinates based on output from the touch screen section. The storage section stores therein detection coordinate data showing coordinate values associated with possible output values of the touch screen section, and a predetermined number of sets of touch position coordinates detected. On detecting a touch in a non-operable region the predetermined number of times in succession, the control section displays a target point image on the display section, determines an amount of deviation between the detected coordinates and the display coordinates of the target point image, and calibrates the detection coordinate data in accordance with the amount of deviation.

主权项

1. A display and input device comprising:
a display section configured to display thereon a screen image including
one or more operation element images each operable to cause switching of the screen image anda non-operable region in which no operation element image is present; a touch screen section configured to detect a touch position on the screen image; a control section configured to
detect a set of touch position coordinates of the touch position based on output from the touch screen section,compare the detected touch position coordinates with image data of the screen image displayed on the display section to determine that when a display position of any of the operation element images overlaps the detected touch position coordinates, the overlapping operation element image is operated, andcontrol the display section to switch the screen image according to the operation element image operated; and a storage section configured to store therein
detection coordinate data showing coordinate values associated with possible output values of the touch screen section andat least a predetermined number of sets of touch position coordinates detected in succession including a set of touch position coordinates most recently detected, wherein on detecting a touch operation in the non-operable region the predetermined number of times in succession, the control section displays on the display section a target point image for calibrating coordinate detection, determines an amount of deviation between a set of touch position coordinates detected after display of the target point image and a set of display coordinates of the target point image, and calibrates the detection coordinate data such that each set of touch position coordinates subsequently detected is corrected in accordance with the amount of deviation.