De-Sheng
De-Sheng Guo, Taoyuan Hsien CN
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20140035541 | CONTROL CIRCUIT, CONTROL METHOD USED IN PFC CIRCUIT AND POWER SOURCE SYSTEM THEREOF - A control circuit, control method used in a PFC circuit and the power source system thereof are disclosed herein. The control circuit comprises: a zero current detection circuit having a polarity detection circuit for outputting a first and a second digital signals and a signal conversion circuit for generating an analog signal; a feedback circuit for generating a driving pulse signal; and a pulse distribution circuit for distributing the driving pulse signal to a first and a second switches according to the first and the second digital signal. After a switch cycle, one of the first and the second switch performs an ON operation for the next switch cycle when the current flowing through the inductor decreases to a predetermined threshold value, wherein an ON time of the first switch is equal in each switch cycle, and an ON time of the second switch is equal in each switch cycle. | 02-06-2014 |
De-Sheng Guo, Taoyuan City TW
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20150303791 | CONTROL CIRCUIT, CONTROL METHOD USED IN PFC CIRCUIT AND POWER SOURCE SYSTEM THEREOF - A control circuit, control method used in a PFC circuit and the power source system thereof are disclosed herein. The control circuit comprises: a zero current detection circuit having a polarity detection circuit for outputting a first and a second digital signals and a signal conversion circuit for generating an analog signal; a feedback circuit for generating a driving pulse signal; and a pulse distribution circuit for distributing the driving pulse signal to a first and a second switches according to the first and the second digital signal. After a switch cycle, one of the first and the second switch performs an ON operation for the next switch cycle when the current flowing through the inductor decreases to a predetermined threshold value, wherein an ON time of the first switch is equal in each switch cycle, and an ON time of the second switch is equal in each switch cycle. | 10-22-2015 |
De-Sheng Liang, Xiamen CN
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20150376878 | Faucet Valve Core - A faucet valve core includes an outer shell, a bottom cover connected with a bottom of the outer shell, a valve stem rotatable and partially mounted in the outer shell. The inner end of the valve stem is connected with a top side of the movable valve plate, a bottom side of the move valve plate is connected with a fixed valve plate. A pair of water channels is conic and is formed through the fixed valve plate and each water channel has a top opening and a bottom opening that is larger than the top opening. Given the faucet valve core, water flow rate can be increased while the size of the entire faucet valve core can be reduced. | 12-31-2015 |
De-Sheng Tsai, Burlington, NC US
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20140304888 | HEAD COVER - An expandable head cover is made in one-piece flat form of width 9-15″ and made of two latex-free nonwoven sheets of having a retraction force of greater than 0.5 lb/2″ and less than 3 lb/2″ from a 100% elongation and a hydrostatic pressure resistance of above 500 mm H | 10-16-2014 |