WO1994025912B1 - Toggle brightening circuit for powering gas discharge lamps and method for operating gas discharge lamps - Google Patents
Toggle brightening circuit for powering gas discharge lamps and method for operating gas discharge lampsInfo
- Publication number
- WO1994025912B1 WO1994025912B1 PCT/US1994/003868 US9403868W WO9425912B1 WO 1994025912 B1 WO1994025912 B1 WO 1994025912B1 US 9403868 W US9403868 W US 9403868W WO 9425912 B1 WO9425912 B1 WO 9425912B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power
- lamps
- circuit
- level
- capacitor
- Prior art date
Links
- 238000005282 brightening Methods 0.000 title 1
- 239000003990 capacitor Substances 0.000 claims 9
- 230000003247 decreasing Effects 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
Abstract
A circuit (100) for powering fluorescent lamps (102, 104 and 106) includes a switch (50) having 'open' and 'closed' positions. When power is initially applied to the circuit, the lamps are powered at full power to enable them to 'strike'. After a short period, the power is reduced to the lamp. A control circuit (300) thereafter senses if the switch has been 'toggled'. If toggled, the power to the lamps is increased, and the lamps brighten. The circuit uses a conventional two-position switch and conventional wiring and avoids the need for additional switches and additional wiring.
Claims
1. A circuit for powering a gas discharge lamp from a source of AC power, comprising: lamp energizing means for energizing the lamps at a high energy level and a low energy level; a capacitor arranged to become charged when power is provided to the circuit; a control circuit for controlling the lamp energizing means so that when power is applied to the circuit: if the level of charge of the capacitor is below a predetermined level, the lamp energizing means energizes the lamps at the high energy level for a short period of time until after the lamps are ignited, and then energizes the lamps at the low energy level after the short period of time; but if the level of charge of the capacitor is above a predetermined level, the lamp energizing means energizes the lamps at the high energy level.
2. The circuit of claim 1 including a switch having a first and second state coupled to the lamp energizing means and to the source of AC power, such that when the switch is in its first state, no power is supplied to the lamp energizing means, and when the switch is in its second state, full power is applied to the lamp energizing means;
3. The circuit of claim 2 where the lamp energizing means comprises an inverter.
4. The circuit of claim 3 wherein the low level of energy is about one-half the high level of energy.
5. A method of operating fluorescent lamps at either a low energy level or a high energy level, comprising the steps of: energizing the fluorescent lamps at from a source of AC power so that the lamps strike; automatically decreasing the energy supplied to the fluorescent lamps after short period of time so that the lamps operate at the low energy level; increasing the energy supplied to the fluorescent lamps so that the lamps operate at the high energy level if power to the fluorescent lamps is interrupted for a brief period of time.
6. The method of claim 5 where the brief period of time is less than one-half second.
7. The method of claim 6 including the steps of: charging a capacitor when the lamps are energized; discharging the capacitor when the lamps are not energized; if the energy supplied to the lamps is interrupted, sensing if the capacitor is discharged; if the capacitor has not discharged during the interruption of energy, operating the lamps at a high energy level.
8. A circuit for powering fluorescent lamps from a source of AC power at a first frequency comprising: a rectifier controllably coupled to the source of AC power for converting the AC at a first frequency to DC power; - 2 1 -
a boost circuit coupled to the rectifier for increasing the voltage of the DC power to a high level or a low level; an inverter coupled to the rectifier for converting the DC power to AC power at a second higher frequency; a connector circuit for connecting the AC power produced by the inverter to the fluorescent lamps; a control circuit for causing the boost circuit to:
(1) produce DC power at the high voltage level when power is first applied to the rectifier;
(2) produce DC power at a low voltage level after a short period of time after power is first applied to the rectifier; and
(3) produce DC power at a high voltage level if power to the rectifier is momentarily interrupted.
9. The circuit of claim 8 including a switch for controlling whether AC power at a first frequency is coupled to the rectifier.
10. The circuit of claim 9 including a capacitor coupled to the control circuit such that the capacitor charges when the switch is closed, and discharges when the switch opens .
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94915360A EP0654156A4 (en) | 1993-05-04 | 1994-04-08 | Toggle brightening circuit for powering gas discharge lamps and method for operating gas discharge lamps. |
JP6524294A JPH07508853A (en) | 1993-05-04 | 1994-04-08 | Toggle brightness adjustment circuit for powering gas discharge lamps and methods of operating gas discharge lamps |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US057,276 | 1993-05-04 | ||
US08/057,276 US5373218A (en) | 1993-05-04 | 1993-05-04 | Toggle brightening circuit for powering gas discharge lamps and method for operating gas discharge lamps |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1994025912A1 WO1994025912A1 (en) | 1994-11-10 |
WO1994025912B1 true WO1994025912B1 (en) | 1994-12-08 |
Family
ID=22009601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1994/003868 WO1994025912A1 (en) | 1993-05-04 | 1994-04-08 | Toggle brightening circuit for powering gas discharge lamps and method for operating gas discharge lamps |
Country Status (5)
Country | Link |
---|---|
US (1) | US5373218A (en) |
EP (1) | EP0654156A4 (en) |
JP (1) | JPH07508853A (en) |
CN (1) | CN1108864A (en) |
WO (1) | WO1994025912A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5808423A (en) * | 1996-05-10 | 1998-09-15 | Philips Electronics North America Corporation | Lighting control for reducing energy consumption |
US6181072B1 (en) | 1997-05-29 | 2001-01-30 | Ez Lighting, Llc | Apparatus and methods for dimming gas discharge lamps using electronic ballast |
US5925990A (en) * | 1997-12-19 | 1999-07-20 | Energy Savings, Inc. | Microprocessor controlled electronic ballast |
US6177769B1 (en) | 1999-08-11 | 2001-01-23 | Energy Savings, Inc. | Electric Ballast with selective power dissipation |
US6137239A (en) * | 1999-08-11 | 2000-10-24 | Energy Savings, Inc. | Electronic ballast with selective load control |
EP1149517A1 (en) * | 1999-11-02 | 2001-10-31 | Koninklijke Philips Electronics N.V. | Circuit device |
US7109668B2 (en) * | 2003-10-30 | 2006-09-19 | I.E.P.C. Corp. | Electronic lighting ballast |
US20070194721A1 (en) * | 2004-08-20 | 2007-08-23 | Vatche Vorperian | Electronic lighting ballast with multiple outputs to drive electric discharge lamps of different wattage |
US7084579B2 (en) * | 2004-12-13 | 2006-08-01 | Osram Sylvania Inc. | Two light level ballast |
US7218063B2 (en) * | 2005-05-27 | 2007-05-15 | Osram Sylvania, Inc. | Two light level ballast |
CN1925714B (en) * | 2005-09-02 | 2010-05-05 | 索玉昇 | Multistage light modulation control device for gas-discharge lamp and light modulation control method thereof |
US20100289428A1 (en) * | 2009-05-12 | 2010-11-18 | Advanced Control Technologies, Inc. | Controllable Retroffited LED Panel Lighting |
US8183798B2 (en) * | 2009-10-05 | 2012-05-22 | Hubbell Incorporated | Variable light control system and method using momentary circuit interrupt |
US8294379B2 (en) * | 2009-11-10 | 2012-10-23 | Green Mark Technology Inc. | Dimmable LED lamp and dimmable LED lighting apparatus |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0093408A1 (en) * | 1982-04-29 | 1983-11-09 | Bronson Potter | Brightness control device |
US4558262A (en) * | 1983-03-09 | 1985-12-10 | Lutron Electronics Co., Inc. | Load switching arrangement for gas discharge lamp circuit |
CH680627A5 (en) * | 1990-04-02 | 1992-09-30 | Hebag Planungs Ag Elektro Inge | Control system for fluorescent lamp - responds to detected movement to operate lamp over successive timed intervals with reduced light output |
DE4037948A1 (en) * | 1990-11-29 | 1992-06-04 | Holzer Walter | METHOD AND DEVICE FOR CONTROLLING GAS DISCHARGE LAMPS WITH ELECTRONIC CONTROL GEAR |
US5194781A (en) * | 1991-07-31 | 1993-03-16 | Motorola Lighting, Inc. | Control circuit |
US5191263A (en) * | 1992-03-04 | 1993-03-02 | Motorola Lighting, Inc. | Ballast circuit utilizing a boost to heat lamp filaments and to strike the lamps |
US5248919A (en) * | 1992-03-31 | 1993-09-28 | Lutron Electronics Co., Inc. | Lighting control device |
-
1993
- 1993-05-04 US US08/057,276 patent/US5373218A/en not_active Expired - Lifetime
-
1994
- 1994-04-08 EP EP94915360A patent/EP0654156A4/en not_active Withdrawn
- 1994-04-08 CN CN94190255A patent/CN1108864A/en active Pending
- 1994-04-08 WO PCT/US1994/003868 patent/WO1994025912A1/en not_active Application Discontinuation
- 1994-04-08 JP JP6524294A patent/JPH07508853A/en active Pending
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