Patent ID: 8325173

Claim:
A display device for eliminating deficient display, comprising: a display panel comprising a plurality of pixels; a source driver providing a plurality of pixel voltages to the pixels; and a control device receiving a control signal, determining whether to provide a first voltage to the pixels, and determining the source driver whether to provide the pixel voltages to the pixels according to the control signal, wherein when a system voltage of the display device is less than a predefined voltage and the display device is in a turn-off state, the control device controls the source driver to stop providing the pixel voltages to the pixels, and provides a first voltage to the pixels, the control device comprising: a plurality of switching modules, each switching module comprising: a first output terminal receiving each pixel voltage outputted from the source driver; a first connecting terminal coupled to each pixel; a second connecting terminal; a first switch turned on/off with the first output terminal according to a first control signal; and a second switch coupled to the first connecting terminal, turned on/off with the first switch or the second connecting terminal according to a second control signal; a first connecting line coupled to the second connecting terminal of the switching modules, and coupled to the first voltage; and a signal generation circuit receiving the control signal, and generating the first control signal and the second control signal, wherein if the system voltage is less than the predefined voltage, the first switch is turned off in response to the first control signal, and the second switch is turned on to connect with the second connecting terminal in response to the second control signal.