LEADTREND TECHNOLOGY CORP.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF 6542
 
  
 
H05B ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR 2190
 
  
 
G05F SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES 1783
 
  
 
H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 1463
 
  
 
H03K PULSE TECHNIQUE 6125
 
  
 
H03B GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS 558
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 4155
 
  
 
H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 4116
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 3444
 
  
 
G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR 258

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2017/0070,153 CONTROLLER FOR INCREASING EFFICIENCY OF A POWER CONVERTER AND A RELATED METHOD THEREOFAug 10, 16Mar 09, 17[H02M]
2016/0218,630 FREQUENCY CONTROLLER OF A POWER CONVERTER AND RELATED FREQUENCY CONTROL METHODJan 13, 16Jul 28, 16[H02M]
2015/0069,989 ELECTRIC DEVICE AND CONTROL METHOD CAPABLE OF REGULATING DC CURRENT THROUGH A DEVICESep 05, 14Mar 12, 15[H02M, H03F]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9917504 Synchronous rectifier applied to a power converter and operation method thereofJun 13, 16Mar 13, 18[H02M]
9917523 Control methods and switching mode power supplies with improved dynamic response and reduced switching lossAug 31, 17Mar 13, 18[H02M]
9882494 Switching-mode power supplies capable of operating at valley switching, and relevant control methodsJan 17, 17Jan 30, 18[H02M]
9843264 Controller of a power converter and operation method thereofMar 02, 16Dec 12, 17[H02M]
9825534 Dummy load controllers and control methods for power supplies capable of quickly lowering output voltage at output nodeMay 20, 15Nov 21, 17[H02M]
9800135 Ripple suppressorSep 02, 16Oct 24, 17[H02M, G05F]
9800163 Method for controlling a dead time of a secondary side of a power converterNov 15, 16Oct 24, 17[H02M]
9774267 Power supplies and control methods suitable for sequentially transmitting command bits from secondary side to primary sideJun 06, 16Sep 26, 17[H02M]
9755421 Control circuit applied to a power converter and operation method thereofJan 19, 15Sep 05, 17[H02H]
9735684 Controllers, power supplies and control methodsNov 12, 14Aug 15, 17[H02M, H02H]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2016/0149,561 SUPER HIGH VOLTAGE DEVICE AND METHOD FOR OPERATING A SUPER HIGH VOLTAGE DEVICEAbandonedFeb 05, 16May 26, 16[H03K]
2016/0087,534 METHODS AND POWER CONTROLLERS FOR PRIMARY SIDE CONTROLAbandonedDec 07, 15Mar 24, 16[H02M]
2015/0028,752 CONTROL CIRCUIT OF LIGHT EMITTING DIODES AND OPERATION METHOD OF A CONTROL CIRCUIT OF LIGHT EMITTING DIODESAbandonedJul 21, 14Jan 29, 15[H05B]
2015/0028,819 METHODS FOR CHARGING A RECHARGEABLE BATTERYAbandonedJul 21, 14Jan 29, 15[H02J]
2015/0029,767 Power Controllers with Ultra-High-Voltage StartupAbandonedJul 16, 14Jan 29, 15[H02M]
2014/0036,558 Power Controllers, Power Supplies and Control Methods ThereforAbandonedJul 17, 13Feb 06, 14[H02M]
2013/0307,606 SUPER HIGH VOLTAGE DEVICE AND METHOD FOR OPERATING A SUPER HIGH VOLTAGE DEVICEAbandonedMar 13, 13Nov 21, 13[H03K, H01L]
2013/0301,303 POWER CONTROLLERS AND CONTROL METHODSAbandonedMar 13, 13Nov 14, 13[H02M]
2013/0093,327 CONTROL METHODS FOR LED CHAINSAbandonedOct 12, 12Apr 18, 13[H05B]
2013/0070,483 Controlling Method, Power Supply, Power Controller, and Power Controlling MethodAbandonedSep 20, 11Mar 21, 13[H02M]
2013/0049,706 CIRCUIT FOR DISCHARGING AN X CAPACITORAbandonedAug 29, 12Feb 28, 13[H02J]
2013/0038,243 CURRENT-CONTROLLED STAGES, CONSTANT CURRENT CONTROL SYSTEMS, AND CURRENT CONTROL METHODS FOR DRIVING LEDSAbandonedJul 16, 12Feb 14, 13[H02J, H05B, G05F]
2012/0235,651 POWER SUPPLIES AND RELATED METHODS CAPABLE OF REDUCING OUTPUT VOLTAGE RIPPLEAbandonedMar 16, 12Sep 20, 12[H02M]
2012/0159,207 POWER MANAGEMENT DEVICE AND METHOD THEREOFAbandonedDec 15, 11Jun 21, 12[G06F]
2012/0140,370 Protection Circuit and Protection MethodAbandonedDec 06, 11Jun 07, 12[H02H]
2012/0112,564 Discharging module applied in a switched-mode power supply and method thereofAbandonedApr 22, 11May 10, 12[H02H]
2012/0086,347 CONTROL CIRCUIT OF LIGHT EMITTING DIODESAbandonedOct 07, 11Apr 12, 12[H05B]
2012/0062,149 LIGHT EMITTING DIODE DRIVING INTEGRATED CIRCUITAbandonedAug 29, 11Mar 15, 12[H05B]
2012/0008,343 High-Voltage Startup Method and Power Management ApparatusAbandonedJul 06, 11Jan 12, 12[H02M]
2011/0298,429 POWER PATH MANAGEMENT CIRCUIT AND METHODAbandonedJun 02, 11Dec 08, 11[H02J]

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