Patent US6424100B1 successfully refreshed from Google Patents.
US6424100B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp operating apparatus and compact self-ballasted fluorescent lamp
Assignee: Panasonic Holdings Corp
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Filing: 2000-10-20
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Granted: 2002-07-23
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Expires: 2020-10-20
Abstract
Abstract Disclosed is a dimmable fluorescent lamp operating apparatus which comprises a fluorescent lamp, electrical characteristic detecting element for detecting an electrical characteristic of the fluorescent lamp, an inverter circuit for driving the fluorescent lamp, and a feedback controlling circuit for controlling the drive frequency of the inverter circuit such that the electrical characteristic of the fluorescent lamp becomes a predetermined value, wherein the feedback controlling circuit includes temperature detecting element for detecting the temperature of the fluorescent lamp and wherein the frequency characteristic bandwidth of the feedback controlling circuit is varied based on the detected fluorescent lamp temperature.
Inventors
- 👤 Satoshi Kominami
- 👤 Koji Miyazaki
- 👤 Mamoru Takeda
- 👤 Takayuki Imai
- 👤 Masayoshi Gyoten
- 👤 Masanobu Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:02
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/36; H05B41/38; H05B41/39; H05B41/392; H05B41/3921; H05B41/3925
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
A dimmable fluorescent lamp operating apparatus comprising: a fluorescent lamp; electrical characteristic detecting means for detecting an electrical characteristic of said fluorescent lamp; an inverter circuit for driving said fluorescent lamp; and a feedback controlling circuit for controlling the drive frequency of said inverter circuit such that said electrical characteristic of said fluorescent lamp becomes a predetermined value; wherein said feedback controlling circuit includes temperature detecting means for detecting the temperature of said fluorescent lamp and wherein the frequency characteristic bandwidth of said feedback controlling circuit is varied based on said detected fluorescent lamp temperature.
Claim 2
Dependent Claim
95 words
A dimmable fluorescent lamp operating apparatus comprising: a fluorescent lamp; electrical characteristic detecting means for detecting an electrical characteristic of said fluorescent lamp; an inverter circuit for driving said fluorescent lamp; and a feedback controlling circuit for controlling the drive frequency of said inverter circuit such that said electrical characteristic of said fluorescent lamp becomes a predetermined value; wherein said feedback controlling circuit includes temperature detecting means for detecting the temperature of said fluorescent lamp and wherein the frequency characteristic bandwidth of said feedback controlling circuit is varied based on said detected fluorescent lamp temperature.
Claim 3
Dependent Claim
51 words
The fluorescent lamp operating apparatus of claim 1 , wherein said feedback controlling circuit has functions such that when said detected fluorescent lamp temperature is relatively high, said frequency characteristic bandwidth is made narrower, while when said detected fluorescent lamp temperature is relatively low, said frequency characteristic bandwidth is made wider.
Claim 4
Dependent Claim
20 words
The fluorescent lamp operating apparatus of claim 1 , wherein said temperature detecting means is a thermally sensitive resistance element.
Claim 5
Dependent Claim
126 words
A compact self-ballasted fluorescent lamp comprising a fluorescent lamp, a ballast circuit, and a base wherein said fluorescent lamp is integrally formed with said ballast circuit and said base which are electrically connected to said fluorescent lamp, said ballast circuit comprising: electrical characteristic detecting means for detecting an electrical characteristic of said fluorescent lamp; an inverter circuit for driving said fluorescent lamp; and a feedback controlling circuit for controlling the drive frequency of said inverter circuit such that said electrical characteristic of said fluorescent lamp becomes a predetermined value; wherein said feedback controlling circuit includes temperature detecting means for detecting the temperature of said fluorescent lamp and wherein the frequency characteristic bandwidth of said feedback controlling circuit is varied based on said detected fluorescent lamp temperature.
Claim 6
Dependent Claim
126 words
A compact self-ballasted fluorescent lamp comprising a fluorescent lamp, a ballast circuit, and a base wherein said fluorescent lamp is integrally formed with said ballast circuit and said base which are electrically connected to said fluorescent lamp, said ballast circuit comprising: electrical characteristic detecting means for detecting an electrical characteristic of said fluorescent lamp; an inverter circuit for driving said fluorescent lamp; and a feedback controlling circuit for controlling the drive frequency of said inverter circuit such that said electrical characteristic of said fluorescent lamp becomes a predetermined value; wherein said feedback controlling circuit includes temperature detecting means for detecting the temperature of said fluorescent lamp and wherein the frequency characteristic bandwidth of said feedback controlling circuit is varied based on said detected fluorescent lamp temperature.
Claim 7
Dependent Claim
51 words
The compact self-ballasted fluorescent lamp of claim 4 , wherein said feedback controlling circuit has functions such that when said detected fluorescent lamp temperature is relatively high, said frequency characteristic bandwidth is made narrower, while when said detected fluorescent lamp temperature is relatively low, said frequency characteristic bandwidth is made wider.
Claim 8
Dependent Claim
20 words
The compact self-ballasted fluorescent lamp of claim 4 , wherein said temperature detecting means is a thermally sensitive resistance element.
Claim 9
Dependent Claim
41 words
The compact self-ballasted fluorescent lamp of claim 6 , wherein said thermally sensitive resistance element is so disposed as to be spaced at least 10 mm apart from a tube end at which an electrode of said fluorescent lamp is sealed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-07-22 | 2006-01-21 | 2006-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-22 | 2010-01-21 | 2010-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-22 | 2014-01-21 | 2014-07-23 | $7700.00 | Window Closed / Lapsed |