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US 8,947,004 B2Granted
Electronic device
AssigneeOptromax Electronics Co., Ltd
InventorKuo-Tso Chen
Life of this patent
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Abstract
An electronic device is provided. The electronic device includes a plurality of load units, a plurality of serial-parallel switch units and a control module. The control module switches the serial-parallel switch units to a first state or a second state according to a level variation of an input voltage. Connection relations of the load units are correspondingly changed according to the level variation of the input voltage. In this way, the electronic device can be driven by an alternating-current voltage.
Claims21
An electronic device, comprising:
- N load units, respectively having a first terminal and a second terminal, wherein the first terminal of a first load unit is used for receiving an input voltage, and the second terminal of an N-th load unit is coupled to ground, and N is an integer greater than 1;
- (N−1) serial-parallel switch units, respectively having a first terminal to a fourth terminal, wherein the first terminal of each of the serial-parallel switch units receives the input voltage, the second terminal of an i-th serial-parallel switch unit is connected to the second terminal of an i-th load unit, the third terminal of the i-th serial-parallel switch unit is connected to the first terminal of an (i+1)-th load unit, and the fourth terminal of each of the serial-parallel switch unit is connected to ground, wherein i is an integer and 1≦i≦(N−1);
- and
- a control module, for switching the serial-parallel switch units to a first state or a second state according to a level variation of the input voltage,
- wherein when the i-th serial-parallel switch unit is in the first state, the first terminal thereof is connected to the third terminal thereof, and the second terminal thereof is connected to the fourth terminal thereof, and when the i-th serial-parallel switch unit is in the second state, the first terminal and the fourth terminal thereof are isolated, and the second terminal thereof is connected to the third terminal thereof,
- wherein when the i-th serial-parallel switch unit is in the first state, the i-th load unit and the (i+1)-th load unit are connected in parallel with each other, and when the i-th serial-parallel switch unit is in the second state, the i-th load unit and the (i+1)-th load unit are connected in series with each other.
3 more elements
An electronic device comprising:
- N first load units, respectively having a first terminal and a second terminal, wherein the first terminal of a 1st first load unit receives an input voltage, and N is an integer greater than 1;
- (N−1) first serial-parallel switch units, respectively having a first terminal to a fourth terminal, wherein the first terminals of the first serial-parallel switch units are coupled to the first terminal of the 1st first load unit, the second terminal of an i-th first serial-parallel switch unit is coupled to the second terminal of an i-th first load unit, the third terminal of the i-th first serial-parallel switch unit is coupled to the first terminal of an (i+1)-th first load unit, and the fourth terminals of the first serial-parallel switch units are coupled to the second terminal of an N-th first load unit, wherein i is an integer and 1≦i≦(N−1);
- a second serial-parallel switch unit, having a first terminal to a fourth terminal, wherein the first terminal of the second serial-parallel switch unit receives the input voltage, the second terminal of the second serial-parallel switch unit is coupled to the second terminal of the N-th first load unit, and the fourth terminal of the second serial-parallel switch unit is coupled to ground;
- and
- a control module, for switching the first serial-parallel switch units and the second serial-parallel switch unit to a first state or a second state according to a level variation of the input voltage,
- wherein when the i-th first serial-parallel switch unit is in the first state, the first terminal thereof is conducted to the third terminal thereof, and the second terminal is conducted to the fourth terminal thereof, and when the i-th first serial-parallel switch unit is in the second state, the first terminal and the fourth terminal thereof are isolated, and the second terminal thereof is conducted to the third terminals thereof,
- wherein when the second serial-parallel switch unit is in the first state, the first terminal thereof is conducted to the third terminal thereof, and the second terminal is conducted to the fourth terminal thereof, and when the second serial-parallel switch unit is in the second state, the first terminal and the fourth terminal thereof are isolated, and the second terminal thereof is conducted to the third terminals thereof.
4 more elements
Dependencies are inferred from the claim text.