JPS6457598A - Discharge lamp lighting device - Google Patents

Discharge lamp lighting device

Info

Publication number
JPS6457598A
JPS6457598A JP21178587A JP21178587A JPS6457598A JP S6457598 A JPS6457598 A JP S6457598A JP 21178587 A JP21178587 A JP 21178587A JP 21178587 A JP21178587 A JP 21178587A JP S6457598 A JPS6457598 A JP S6457598A
Authority
JP
Japan
Prior art keywords
emissionless
circuit
state
discharge lamp
tph
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP21178587A
Other languages
Japanese (ja)
Other versions
JP2617482B2 (en
Inventor
Kazuyuki Matsukawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP62211785A priority Critical patent/JP2617482B2/en
Publication of JPS6457598A publication Critical patent/JPS6457598A/en
Application granted granted Critical
Publication of JP2617482B2 publication Critical patent/JP2617482B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

PURPOSE:To reliably inform a user of the necessity to replace a discharge lamp by displaying the emissionless state via the flickering of the discharge lamp when the discharge lamp becomes the emissionless state and displaying the emissionless state every time a dimmer switch is operated after the emissionless state display. CONSTITUTION:While a display lamp l1 is fully lit, if it approaches the life terminal stage and performs the half-wave discharge, a high-level emissionless state detection signal is outputted from an emissionless state detecting circuit 2, a counter circuit 3 is counted up once, and this signal passes an AND circuit A5 to reset a preheat timer circuit Tph. The preheating operation is thereby performed for a fixed time, then the start operation is performed again. When a dimmer switch Sd is turned on, the output of an AND circuit A8 is changed to a low level, a trigger signal is outputted from a trigger signal generating circuit 7 to set the counter circuit 3. The output signal of the counter circuit 3 becomes a low level. The emissionless state detection signal passes the AND circuit A5 again, the preheat timer circuit Tph is reset, the preheating operation and the restart operation are performed, and the emissionless state is displayed.
JP62211785A 1987-08-26 1987-08-26 Discharge lamp lighting device Expired - Lifetime JP2617482B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62211785A JP2617482B2 (en) 1987-08-26 1987-08-26 Discharge lamp lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62211785A JP2617482B2 (en) 1987-08-26 1987-08-26 Discharge lamp lighting device

Publications (2)

Publication Number Publication Date
JPS6457598A true JPS6457598A (en) 1989-03-03
JP2617482B2 JP2617482B2 (en) 1997-06-04

Family

ID=16611564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62211785A Expired - Lifetime JP2617482B2 (en) 1987-08-26 1987-08-26 Discharge lamp lighting device

Country Status (1)

Country Link
JP (1) JP2617482B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01231295A (en) * 1988-03-09 1989-09-14 Toshiba Electric Equip Corp Discharge lamp lighting device
JPH10503047A (en) * 1994-07-19 1998-03-17 シーメンス アクチエンゲゼルシヤフト Method of operating at least one fluorescent lamp with electronic ballast and ballast arrangement for the fluorescent lamp

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61190898A (en) * 1985-02-18 1986-08-25 三菱電機株式会社 Discharge lamp lighting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61190898A (en) * 1985-02-18 1986-08-25 三菱電機株式会社 Discharge lamp lighting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01231295A (en) * 1988-03-09 1989-09-14 Toshiba Electric Equip Corp Discharge lamp lighting device
JPH10503047A (en) * 1994-07-19 1998-03-17 シーメンス アクチエンゲゼルシヤフト Method of operating at least one fluorescent lamp with electronic ballast and ballast arrangement for the fluorescent lamp

Also Published As

Publication number Publication date
JP2617482B2 (en) 1997-06-04

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