Patent ID: 8432386
Filing Date: 2013-04-30
Classification: G09G

Abstract:
1. A switch device for a source driver of a liquid crystal display, comprising: a first switch module having a first semiconductor switch and a second semiconductor switch connected between a first input terminal and a first output terminal, wherein the first semiconductor switch is connected to the second semiconductor switch via a first node; a first switch connected between the first node and a first voltage source; a second switch connected between the first node and a second voltage source; a second switch module connected between the first input terminal and a second output terminal; a third switch module connected between a second input terminal and the first output terminal; a fourth switch module having a third semiconductor switch and a fourth semiconductor switch connected between the second input terminal and the second output terminal, wherein the third semiconductor switch is connected to the fourth semiconductor switch via a second node; a third switch connected between the second node and the third voltage source; and a fourth switch connected between the second node and the fourth voltage source, wherein when a first driving signal with a voltage level between a first voltage level and a second voltage level at the first input terminal, through the second switch module, is sent to the second output terminal and a second driving signal with a voltage level between a third voltage level and a fourth voltage level at the second input terminal, through the third switch module, is sent to the first output terminal, the first switch is turned on such that the first node is connected to the first voltage source with the first voltage level and the fourth switch is turned on such that the second node is connected to the fourth voltage source with the fourth voltage level.