Liquid crystal display apparatus, method of controlling the same, and liquid crystal projector system

A method of controlling a liquid crystal display apparatus including (a) a display area in which a plurality of pixels are arranged to form a matrix, each of the pixels comprising a switching element and an electrode connected to a first terminal of the switching element;

• (b) a first scanning circuit configured to control whether the switching elements of the pixels are turned on or off via a plurality of first wires;
• (c) a second scanning circuit configured to control whether an image signal generating circuit that generates image signals is electrically connected to or disconnected from a plurality of second wires, and to assign the image signals to the pixels via the second wires;
• (d) a discharging element configured to discharge the image signals assigned to the pixels;
• and (e) a detecting circuit configured to detect a reduction in a power supply voltage and to output a detection signal, (f) a third wire provided between the image signal generating circuit and the second wires, (g) a first switch provided between the second wires and the third wire, and (h) a third switch provided between the image signal generating circuit and the third wire, the method comprising:
• a control step of performing a controlling operation according to the detection signal so that the image signal generating circuit is electrically disconnected from the second wires by turning off the third switch, the switching elements are turned on, and the discharging element is caused to operate.