发明名称 LIQUID CRYSTAL DISPLAY AND GATE DISCHARGE CONTROL CIRCUIT THEREOF
摘要 A liquid crystal display (LCD) and a gate discharge control circuit thereof are provided. The gate discharge control circuit has a first voltage division circuit, a control circuit, a second voltage division circuit and at least a discharge switch. A switch of the control circuit operates according to a first DC voltage so as to be turned on when the LCD is powered on and to be turned off during shutting down the LCD. The first voltage division circuit divides a second DC voltage to output a divided voltage. A falling speed of the second DC voltage is less than that of the first DC voltage. During shutting down the LCD, voltage levels of a first end and a control end of the discharge switch are pulled up because of operations of the first and second voltage division circuits, such that discharge operations of pixels of the LCD are performed.
申请公布号 US2015331269(A1) 申请公布日期 2015.11.19
申请号 US201514614418 申请日期 2015.02.05
申请人 AU Optronics Corp. 发明人 Chen Po-Kun;Chu Gia-Sheng
分类号 G02F1/133;G02F1/1368;G02F1/1362 主分类号 G02F1/133
代理机构 代理人
主权项 1. A gate discharge control circuit of a liquid crystal display (LCD), comprising: a first input end, configured to receive a first direct current (DC) voltage; a second input end, configured to receive a second DC voltage, wherein a falling speed of the second DC voltage is less than a falling speed of the first DC voltage during shutting down the LCD; a first voltage division circuit, coupled between the second input end and a grounded end; a control circuit, having a switch, a control end of the switch being coupled to the first input end, a first end of the switch being coupled to a first node of the first voltage division circuit, and a second end of the switch being coupled to the grounded end; a second voltage division circuit, having a first end, a second end and a second node, the first end of the second voltage division circuit being coupled to the first node and the first end of the switch; and at least a discharge switch, having a first end, a second end and a control end, the first end of the at least a discharge switch being coupled to the second node, the second end of the at least a discharge switch being coupled to at least a gate line of the LCD, and the control end of the at least a discharge switch being coupled to the second end of the second voltage division circuit.
地址 Hsin-Chu TW