Gate-on voltage generation circuit, gate-off voltage generation circuit, and liquid crystal display device having the same

• Main Authors: YHEE, SHANG MIN, ZHANGZHIFENG, PARK, SEONG II, WOO, DOO HYUNG, KIM, CHI WOO, PARK, KEE CHAN
• Format: Patent
• Language: English; French; German
• Published: 06.02.2008
• Subjects: ADVERTISING; APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; CRYPTOGRAPHY; DISPLAY; EDUCATION; ELECTRICITY; GENERATION; INFORMATION STORAGE; PHYSICS; SEALS; STATIC STORES

A gate-on voltage generation circuit, a gate-off voltage generation circuit, and a liquid crystal display (LCD) using the same are provided. The gate-on voltage generation circuit includes a first capacitor charged with a first control signal and a first reference voltage to output a first charging voltage through a first output node according to the first control signal. A second capacitor is charged with a second control signal and the first reference voltage to output a second charging voltage according to the second control signal. A first switching device is connected between the first capacitor and the first output node to selectively output the first charging voltage to the first output node. A second switching device is turned on by the second charging voltage to supply the first reference voltage to the first capacitor, the first and second switching devices being exclusively turned on and off. A third switching device is turned on by the first charging voltage to supply the first reference voltage to the second capacitor. The third switching device turns on the first switching device and at the same time turns off the second switching device by supplying the first reference voltage to the first and second switching devices.