Power reforming methods and associated multiphase lights

• US 8,674,613 B2
• Filed: 06/21/2010
• Issued: 03/18/2014
• Est. Priority Date: 06/22/2009
• Status: Expired due to Fees

• Current Assignee: Richard Landry Gray
• Original Assignee: Richard Landry Gray
• Inventors: Gray, Richard Landry, Tsai, Po Ming
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): Chen, Jianzi
• Application Number:
  US12/820,131
• Publication Number:
  US 20100320927A1
• Time in Patent Office: 1,366 Days
• Field of Search: 315/119, 315/125, 315/127, 315/128, 315/177, 315/186, 315/193, 315/200.R, 315/206, 315/209.R, 315/219, 315/224, 315/225, 315/276, 315/283, 315/287, 315/291, 315/297, 315/299, 315/306, 315/307, 315/360, 315/362
• US Class Current: 315/209.R
• CPC Class Codes: H02M 1/4208 Arrangements for improving power factor of AC input
• CPC Class Codes: H02M 3/3376 with automatic control of output voltage or current
• CPC Class Codes: H05B 45/325 Pulse-width modulation [PWM]
• CPC Class Codes: H05B 45/46 having LEDs disposed in parallel lines
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The present invention relates to power reforming methods and associated multiphase lights, especially to power reforming methods and associated multiple lights that selectively turn ON and OFF to reform current to follow voltage appropriately, which provides better heat dissipation, improving power factor and color mixing capability. The method comprises acts of rectifying an AC voltage to a pulsating DC voltage, synchronizing an internal time base signal to the pulsating DC voltage, setting pulse duration in a pulse period and turning ON and OFF of an electronic device. The device comprises at least two loads, a rectifier, at least two drivers and a controller.

Claims

1. A power reforming method comprising acts of:

rectifying an AC voltage to a pulsating DC voltage;

synchronizing frequency and phase of an internal time base signal to the pulsating DC voltage;

setting pulse durations in a pulse period setting at least one rising time and at least one falling time of at least two control signals corresponding to the internal time base signal; and

turning at least two loads of an electronic device ON and OFF for at least one interval corresponding to the control signal, which shapes current flow to more accurately follow the pulsating DC voltage.

2. The power reforming method as claimed in claim 1, wherein the ON time portions are non-symmetrically distributed in a period of the pulsating DC voltage.

3. The power reforming method as claimed in claim 1, wherein the ON time portions are symmetrically distributed in a period of the pulsating DC voltage.

4. The power reforming method as claimed in claim 1, wherein the act of turning ON and OFF of an electronic device turns the loads all OFF at 0 and 180 degrees, all ON at 90 and 270 degrees and at least one load ON at other angular positions within a period of pulsating DC voltage.

5. The power reforming method as claimed in claim 1, wherein the loads are selected from a group consisting of a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), a carbon nanotube lamp (CNL), a light emitting diode (LED) lamp and an organic light emitting diode (OLED) lamp.

6. The power reforming method as claimed in claim 1, wherein one of the loads runs at a different power level from that of the other loads.