Abstract: The simple gesture control of the user interface can be used by visually impaired or blind people in order to enter telephone numbers or account numbers for example. The user interface and the method constitute a shift from the current paradigm of guiding a user on touchscreens, which has precisely the advantage of the handeye coordination allowed by the touchscreen, wherein a user touches the exact location on the touchscreen where a corresponding selection surface is visualized. Instead, a swiping gesture is supported which can be carried out in any region on the touch-sensitive surface and shifts the focus from one selection surface or virtual button to the next. The swiping gesture can be carried out not just in the horizontal and vertical direction but also in a diagonal direction. Diagonal swiping gestures allow a particularly quick selection of the corresponding virtual buttons.

Abstract: A simple gesture control system that permits accurate, simple, and secure input of personal identification numbers (PIN) by visually impaired or blind persons at a payment terminal or automatic teller machine is provided. By the user interface, invisible keys can be selected by simple wiping gestures. Here, any necessity for visual or spoken feedback or localization of operating elements is rendered unnecessary. As a result, blind or visually impaired users can input a secret number by touch operation automatically and without outside help. In this way, account is also taken of the statutory requirements in different countries.