Patent ID: 8212801

Claim:
A display device comprising: a first substrate; a second substrate; a plurality of pixel electrodes formed on the first substrate; a switching element supplying a video signal to the pixel electrode; a video signal line supplying a video signal to the switching element; and a scanning signal line supplying a scanning signal which controls the switching element, wherein: a first booster circuit and a second booster circuit are formed on the first substrate and connected serially, the first booster circuit includes a first capacitor element and a first booster switching element connected to the first capacitor element, the second booster circuit includes a second capacitor element and a second booster switching element connecting between the first capacitor element and the second capacitor element, a first pulse is applied to the first capacitor element of the first booster circuit wherein said first pulse oscillates between a first voltage and a second voltage which is lower than the first voltage, a second pulse is applied to the second capacitor element of the second booster circuit, wherein said second pulse has a phase opposite to a phase of the first pulse, a third capacitor element is connected to a control terminal of the first booster switching element to receive a third pulse, wherein said third pulse oscillates between a third voltage and a fourth voltage which is lower than the third voltage, a voltage which is applied to a control terminal of the first booster switching element is boosted by a voltage output of the third capacitor element in response to the third pulse, and the switching element, the first booster circuit and the second booster circuit include a transistor formed on the first substrate, the display device further comprising: a first transistor in a diode connection which is provided between the first capacitor element and the third capacitor element; and a second transistor which is provided between the third capacitor element and the first capacitor element and which includes a control terminal connected to the second capacitor element, wherein, in a state that the fourth voltage is applied to the third capacitor element, the first voltage of the first pulse is applied to the first capacitor element to boost a voltage of a control terminal of the first transistor to a fifth voltage, and the boosted fifth voltage is supplied to a control terminal of the first booster switching element via the first transistor in a diode connection.