Sine wave light-adjusting apparatus

• US 20070257624A1
• Filed: 05/04/2006
• Published: 11/08/2007
• Est. Priority Date: 05/04/2006
• Status: Active Grant

• Current Assignee: Lite-Puter Enterprise Co., Ltd.
• Original Assignee: Lite-Puter Enterprise Co., Ltd.
• Inventors: Hsu, Kun-Pai
• Granted Patent: US 7,329,996 B2
• Time in Patent Office: Days
• US Class Current: 315/209.R
• CPC Class Codes: H05B 39/048 with reverse phase control
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

A sine wave light-adjusting apparatus adjusts the input sine wave voltage and output a desired output sine wave voltage to a lamp according to the desired brightness of the lamp to achieve the light-adjusting effect by adjusting the switching period of a switch and utilizing a flywheel effect. The apparatus includes an energy-storing unit, a positive semi-period switching unit controlled by the microprocessor to execute the switching operation during the positive semi-period of the sine wave voltage, a negative semi-period switching unit controlled by the microprocessor to execute the switching operation during the negative semi-period of the sine wave voltage, a positive semi-period flywheel unit controlled by the microprocessor to conduct during the positive semi-period of the sine wave voltage, and a negative semi-period flywheel unit controlled by the microprocessor to conduct during the negative semi-period of the sine wave voltage.

Claims

1. A sine wave light-adjusting apparatus, controlled by a microprocessor and used for adjusting a sine wave voltage for providing it to a lighting unit, comprising:

an energy-storing unit, connected with the lighting unit;

a positive semi-period switching unit, connected with the energy-storing unit and controlled by the microprocessor to execute a switching operation during the positive semi-period of the sine wave voltage;

a negative semi-period switching unit, connected with the energy-storing unit and controlled by the microprocessor to execute the switching operation during the negative semi-period of the sine wave voltage;

a positive semi-period flywheel unit, connected with the energy-storing unit and the lighting unit and controlled by the microprocessor to conduct during the positive semi-period of the sine wave voltage; and

a negative semi-period flywheel unit, connected with the energy-storing unit and the lighting unit and controlled by the microprocessor to conduct during the negative semi-period of the sine wave voltage.

2. The sine wave light-adjusting apparatus as claimed in claim 1, further comprising a filter unit, connected with the lighting unit.

3. The sine wave light-adjusting apparatus as claimed in claim 2, wherein the filter unit is a capacitor.

4. The sine wave light-adjusting apparatus as claimed in claim 1, wherein the energy-storing unit is an inductor.

5. The sine wave light-adjusting apparatus as claimed in claim 1, wherein the positive semi-period switching unit is composed of a positive semi-period rectifier diode and a positive semi-period switch that both are connected together.

6. The sine wave light-adjusting apparatus as claimed in claim 5, wherein the positive semi-period switch is an insulation gate bipolar transistor (IGBT).

7. The sine wave light-adjusting apparatus as claimed in claim 1, wherein the negative semi-period switching unit is composed of a negative semi-period rectifier diode and a negative semi-period switch that both are connected together.

8. The sine wave light-adjusting apparatus as claimed in claim 7, wherein the negative semi-period switch is an insulation gate bipolar transistor (IGBT).

9. The sine wave light-adjusting apparatus as claimed in claim 1, wherein the positive semi-period flywheel unit is a Silicon Controlled Rectifier (SCR).

10. The sine wave light-adjusting apparatus as claimed in claim 1, wherein the negative semi-period flywheel unit is a Silicon Controlled Rectifier (SCR).

11. A sine wave light-adjusting apparatus, controlled by a microprocessor and used for adjusting a sine wave voltage for providing it to a lighting unit, comprising:

an inductor, connected with the lighting unit;

a first insulation gate bipolar transistor (IGBT1), having a control end, a collector end and an emitter end;

wherein the control end is connected with the microprocessor and the emitter end is connected with one end of the inductor;

a positive semi-period rectifier diode, having a positive end and a negative end;

wherein the negative end is connected with the collector end of the first insulation gate bipolar transistor (IGBT1) and the positive end receives the sine wave voltage;

a first Silicon Controlled Rectifier, having a positive end, a negative end and a triggering end;

wherein the positive end is connected with the collector end of the first insulation gate bipolar transistor (IGBT1), the negative end is connected with the lighting unit, and the triggering end is connected with the microprocessor;

a second insulation gate bipolar transistor (IGBT2), having a control end, a collector end and an emitter end;

wherein the control end is connected with the microprocessor and the collector end is connected with the emitter end of the first insulation gate bipolar transistor (IGBT1);

a negative semi-period rectifier diode, having a positive end and a negative end;

wherein the positive end is connected with the emitter end of the second insulation gate bipolar transistor (IGBT2) and the negative end receives the sine wave voltage; and

a second Silicon Controlled Rectifier, having a positive end, a negative end and a triggering end;

wherein the negative end is connected with the emitter end of the second insulation gate bipolar transistor (IGBT2), the positive end is connected with the lighting unit, and the triggering end is connected with the microprocessor.

12. The sine wave light-adjusting apparatus as claimed in claim 11, further comprising a capacitor, connected with the lighting unit.