High power factor LED drive circuit that adjusts luminance

• Main Authors: WANG CHENGHANG, JIA BAOXING
• Format: Patent
• Language: English
• Published: 16.09.2015
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS,e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USERAPPLICATIONS; 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; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The utility model provides a high power factor LED drive circuit that adjusts luminance, is applicable to the various middle/low power LED lights utensil of adjusting luminance, and the topological structure of its non - isolation can effectively improve the drive circuit's that adjusts luminance efficiency, and its boost's the driving method that steps up can obtain very high power factor to at the whole within range of adjusting luminance, power factor all can maintain very high numerical value. Above -mentioned technical scheme's beneficial effect is, the utility model provides a pair of high power factor LED drive circuit that adjusts luminance, by compatible each type light modulator of principle of the test input energy voltage, the in -process of adjusting luminance guarantees that LED luminance is linear, the steady changes, the process power factor value of remaining stable of wholly adjusting luminance, the will not increases the reactive power loss to reach energy -conserving mesh.