Inverter, its drive method, light emitting device and liquid crystal television using the same

• Main Author: FUKUMOTO, KENICHI
• Format: Patent
• Language: Chinese; English
• Published: 16.06.2007
• Subjects: 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; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS,e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USERAPPLICATIONS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

It is possible to flexibly set a switching timing in an inverter. An H-bridge circuit is controlled according to a triangular wave signal (Vosc) and a difference voltage (Verr). Here, during a first period until the triangular wave signal reaches the difference voltage, a first high side transistor (MH1) and a second low side transistor (ML2) are kept ON. During a second period until the triangular wave signal reaches the peak edge, the first high side transistor (MH1) is kept ON. During a third period until the triangular wave signal reaches the bottom edge, the second high side transistor (MH2) is kept ON. During a fourth period until the triangular wave signal again reaches the difference voltage, the first low side transistor (ML1) and the second high side transistor (MH2) are kept ON. During a fifth period until the triangular wave signal again reaches the peak edge, the second high side transistor (MH2) is kept ON. During a sixth period until the triangular wave signal again reaches the bottom edge, the