Backlight circuit for LCD panel
Patent 7777425 Issued on August 17, 2010. Estimated Expiration Date: 
May 30, 2027. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 30, 2027. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCircuit structure for driving a plurality of cold cathode fluorescent lamps Discharge lamp drive apparatus and liquid crystal display apparatus Inverter circuit and backlight assembly having the same Patent #: 7477023 InventorsAssigneeApplicationNo. 11809046 filed on 05/30/2007US Classes:315/282Regulating transformerExaminersPrimary: Philogene, HaissaInternational ClassH05B 41/16AbstractA multi-lamp backlight system is disclosed. The multi-lamp backlight system includes a plurality of lamps, an inverter circuit and a current balance circuit. The inverter circuit is capable of converting a DC input signal to a pair of AC output signals, which have a 180 degree phase shift. The pair of AC output signals are delivered to the plurality of lamps. The current balance circuit is connected to the low voltage sides of the plurality of lamps for balancing the lamp currents.Field of SearchPERIODIC SWITCH IN THE SUPPLY CIRCUITWith power factor control device Impedance or current regulator in the supply circuit Transformer in the supply circuit Plural transformers in the supply circuit Three or more coil-type transformers Regulating transformer CURRENT AND/OR VOLTAGE REGULATION PLURAL LOAD DEVICE SYSTEMS Plural discharge device loads Discharge control discharge device loads Liquid crystal display elements (LCD) Three or more voltages Backlight control DISPLAY DRIVING CONTROL CIRCUITRY For flyback-type converter Having output current feedback For bridge-type inverter Inverter (i.e., D.C.-A.C.) Bridge type | |
