Driving device and illumination system

Patent metadata

Field	Value
Publication number	US-9544980-B2
Application number	US-201514850251-A
Country	US
Kind code	B2
Filing date	Sep 10, 2015
Priority date	Jan 8, 2015
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A driving device provides output power to an illumination device including a plurality of filaments is provided. A first converting module converts input power into direct current (DC) power. The first converting module includes a pair of first input terminals receiving the input power and a pair of first output terminals coupled to a first node and a second node and outputting the DC power. A first capacitor is coupled between the first node and a third node. A second capacitor is coupled between the second and third nodes. The first clamping module is connected to a first specific capacitor in parallel. The first specific capacitor is the first capacitor or the second capacitor. A second converting module converts the DC power to generate the output power.

First claim

What is claimed is:

1. A driving device providing output power to an illumination device comprising a plurality of filaments, comprising:
a first converting module converting input power into direct current (DC) power, wherein the first converting module comprises a pair of first input terminals receiving the input power and a pair of first output terminals coupled to a first node and a second node and outputting the DC power;
a first capacitor coupled between the first node and a third node;
a second capacitor coupled between the second and third nodes;
a first clamping module connected to a first specific capacitor in parallel, wherein the first specific capacitor is among the first and second capacitors; and
a second converting module converting the DC power to generate the output power, wherein the second converting module comprises a second input terminal pair coupled to the first and second nodes and a second output terminal pair outputting the output power to light the illumination device, wherein the first capacitor is directly connected to the second capacitor.

2. The driving device as claimed in claim 1 , wherein the first converting module is an AC-DC converter and has a power factor correction (PFC) function.

3. The driving device as claimed in claim 1 , wherein the first clamping module is a transient voltage suppressor (TVS) or a metal oxide varistor (MOV).

4. The driving device as claimed in claim 1 , wherein the capacitance values of the first and second capacitors are higher than 22 uF.

5. The driving device as claimed in claim 1 , wherein the first and second capacitors are disposed in the first converting module.

6. The driving device as claimed in claim 1 , wherein the output power is alternating current (AC) power with a high frequency.

7. The driving device as claimed in claim 1 , further comprising:
a preheating module connected to a second specific capacitor in parallel and transferring energy stored in the second specific capacitor to preheat the filament, wherein the second specific capacitor is among the first and second capacitors.

8. The driving device as claimed in claim 1 , further comprising:
a second clamping module connected to a second specific capacitor in parallel, wherein the second specific capacitor is among the first and second capacitors.

9. An illumination system comprising:
a first illumination device comprising a plurality of filaments and turned on according to output power;
a first converting module converting input power into direct current (DC) power, wherein the first converting module comprises a pair of first input terminals receiving the input power and a pair of first output terminals coupled to a first node and a second node and outputting the DC power;
a first capacitor coupled between the first node and a third node;
a second capacitor coupled between the second and third nodes;
a first clamping module connected to a first specific capacitor in parallel, wherein the first specific capacitor is among the first and second capacitors; and
a second converting module converting the DC power to generate the output power, wherein the second converting module comprises a second input terminal pair coupled to the first and second nodes and a second output terminal pair outputting the output power to turn on the illumination device, wherein the first capacitor is directly connected to the second capacitor.

10. The illumination system as claimed in claim 9 , further comprising:
a second illumination device connecting to the first illumination device in parallel and turned on according to the output power, wherein when the first illumination device is not turned on, the second illumination device is turned on according to the output power.

11. The illumination system as claimed in claim 9 , wherein the first converting module is an AC-DC converter and has a power factor correction (PFC) function.

12. The illumination system as claimed in claim 9 , wherein the first clamping module is a transient voltage suppressor (TVS) or a metal oxide varistor (MOV).

13. The illumination system as claimed in claim 9 , wherein the capacitance values of the first and second capacitors are higher than 22 uF.

14. The illumination system as claimed in claim 9 , wherein the output power is alternating current (AC) power with a high frequency.

15. The illumination system as claimed in claim 9 , further comprising:
a preheating module connected to a second specific capacitor in parallel and transferring energy stored in the second specific capacitor to preheat the filament, wherein the second specific capacitor is among the first and second capacitors.

16. The illumination system as claimed in claim 9 , further comprising:
a second clamping module connected to a second specific capacitor in parallel, wherein the second specific capacitor is among the first and second capacitors.

Assignees

• Delta Electronics Inc

Inventors

• Chou Ching Ho
• Lu Yung Chuan
• Chen Yen Yu

Classifications

• H05B41/295 Primary

  with semiconductor devices and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps · CPC title

• H05B41/24

  in which the lamp is fed by high frequency AC {, or with separate oscillator frequency} (H05B41/26 takes precedence) · CPC title

• H05B41/2983

  against abnormal power supply conditions · CPC title

• H05B41/245

  for a plurality of lamps · CPC title