Clean Screen Resistive
The user wants to clean the touch screen.
The figure shows an example for the clean screen pattern on a touch screen with resistive technology.
The user needs to interrupt his work to clean the touch screen.
The difficulty here is to avoid that any safety-relevant events are lost when in cleaning mode, e.g. an incoming emergency call.
Display a full screen with a slider control that prevents ending the cleaning mode inadvertently and allows wiping the screen. The cleaning mode ends when the user presses the four buttons consecutively. Cleaning mode ends automatically upon certain safety-critical events, e.g., when emergency calls come in.
Prevents inadvertent activation of potentially safety-relevant functions.
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