The invention relates to an LCD circuit and a method for triggering at least one pixel (3) of a
liquid crystal display (LCD) in order to optionally apply a
voltage (V) between a first and a second
electrode (1, 2), between which a layer (4) of liquid crystals is arranged. The pixel (3) switches into a non-transparent state when a
voltage (V) is applied whose value is greater than or equal to the value of a
threshold voltage (VD, VD−) between the electrodes (1, 2), a sensor
voltage (VS) which changes across a sensor period (T) being applied to at least one of the electrodes (1; 1, 2) as said voltage (V) or part of said voltage (V) in order to generate a sensor
signal for detecting an object (5) approaching the pixel (3). Also disclosed are an advantageous
liquid crystal display encompassing such a circuit as well as an advantageous
communication device (7) comprising a first housing part (8) that is provided with a
display device (9), a second housing part (10), and an adjusting mechanism (11) for moving the housing parts into a position in which the
display device is located at a distance from the second housing part and moving the housing parts into a position in which the
display device adjoins a bottom area (12) of the second housing part, said bottom area (12) being embodied by means of such a
liquid crystal display.