Gate signal line driving circuit for supressing noise in a gate signal in a display device

摘要

A gate signal line driving circuit which suppresses noises in a gate signal and a display device which uses the gate signal line driving circuit are provided. A first basic circuit provided to a gate signal line driving circuit includes a HIGH voltage applying switching element which applies a HIGH voltage to gate signal lines in response to a signal HIGH period, and a LOW voltage applying switching circuit which applies a LOW voltage to the gate signal lines in response to a signal LOW period. In response to a signal HIGH period, a switch of the LOW voltage applying switching circuit of the first basic circuit is turned off based on a signal applied to a switch of the HIGH voltage applying switching element of a second basic circuit which assumes a signal HIGH period earlier than the first basic circuit.

主权项

1. A gate signal line driving circuit comprising a plurality of basic circuits each of which outputs a gate signal having a HIGH voltage during a signal HIGH period and having a LOW voltage during a signal LOW period which is a period other than the signal HIGH period to a gate signal line, wherein
the plurality of basic circuits includes a first basic circuit, and a second basic circuit which assumes a signal HIGH period before the signal HIGH period of the first basic circuit, and the first basic circuit and the second basic circuit respectively comprise: a LOW voltage applying switching circuit which applies a LOW voltage to the gate signal line in response to the signal LOW period; a HIGH voltage applying switching element which applies a HIGH voltage to the gate signal line in response to the signal HIGH period; and a LOW voltage applying OFF control element which applies a LOW voltage to a switching input terminal of a switch of the LOW voltage applying switching circuit such that the switch of the LOW voltage applying switching circuit is turned off in response to the signal HIGH period, wherein the LOW voltage applying OFF control element of the first basic circuit is turned on in response to an ON voltage applied to an internal voltage line, wherein the internal voltage line is directly connected between a control terminal of the LOW voltage applying OFF control element of the first basic circuit and a control terminal of the HIGH voltage applying switching element of the second basic circuit without directly connecting with the gate signal line.