FR2220961A1 - Electric lamp photo-sensitive switching circuits - where lamp has no effect on photo-sensitive device - Google Patents

Electric lamp photo-sensitive switching circuits - where lamp has no effect on photo-sensitive device

Info

Publication number
FR2220961A1
FR2220961A1 FR7308426A FR7308426A FR2220961A1 FR 2220961 A1 FR2220961 A1 FR 2220961A1 FR 7308426 A FR7308426 A FR 7308426A FR 7308426 A FR7308426 A FR 7308426A FR 2220961 A1 FR2220961 A1 FR 2220961A1
Authority
FR
France
Prior art keywords
lamp
photo
sensitive
effect
switching circuits
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
FR7308426A
Other languages
French (fr)
Other versions
FR2220961B3 (en
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.)
BERNARD RENE FR
Original Assignee
BERNARD RENE FR
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 BERNARD RENE FR filed Critical BERNARD RENE FR
Priority to FR7308426A priority Critical patent/FR2220961A1/en
Publication of FR2220961A1 publication Critical patent/FR2220961A1/en
Application granted granted Critical
Publication of FR2220961B3 publication Critical patent/FR2220961B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H03K17/79—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar semiconductor switches with more than two PN-junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

Light from the lamp has no effect on the photo-sensitive element. A timing circuit is actuated at the same time as the lamp is switched by an exterior light acting on the photo-sensitive element. The lamp is switched out at the end of the timing period, which then triggers another switching and timing cycle if the exterior light intensity is lower than the initial intensity. If the light intensity at the end of the timing cycle is greater than the initial intensity the switching and timing cycle does not restart. The lamp switching time is so short that it is not detectable by the human eye.
FR7308426A 1973-03-09 1973-03-09 Electric lamp photo-sensitive switching circuits - where lamp has no effect on photo-sensitive device Granted FR2220961A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7308426A FR2220961A1 (en) 1973-03-09 1973-03-09 Electric lamp photo-sensitive switching circuits - where lamp has no effect on photo-sensitive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7308426A FR2220961A1 (en) 1973-03-09 1973-03-09 Electric lamp photo-sensitive switching circuits - where lamp has no effect on photo-sensitive device

Publications (2)

Publication Number Publication Date
FR2220961A1 true FR2220961A1 (en) 1974-10-04
FR2220961B3 FR2220961B3 (en) 1976-03-05

Family

ID=9116019

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7308426A Granted FR2220961A1 (en) 1973-03-09 1973-03-09 Electric lamp photo-sensitive switching circuits - where lamp has no effect on photo-sensitive device

Country Status (1)

Country Link
FR (1) FR2220961A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008340A1 (en) * 1980-03-05 1981-09-17 Micheel, Ewald, 4450 Lingen Daylight actuated light switch control circuit - has triac and delay device between two comparators, with one comparator connected to switch at other comparator
DE3127973A1 (en) * 1980-07-16 1982-03-18 Kyoto Ceramic Co., Ltd., Kyoto LIGHTING DEVICE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3008340A1 (en) * 1980-03-05 1981-09-17 Micheel, Ewald, 4450 Lingen Daylight actuated light switch control circuit - has triac and delay device between two comparators, with one comparator connected to switch at other comparator
DE3127973A1 (en) * 1980-07-16 1982-03-18 Kyoto Ceramic Co., Ltd., Kyoto LIGHTING DEVICE

Also Published As

Publication number Publication date
FR2220961B3 (en) 1976-03-05

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Legal Events

Date Code Title Description
ST Notification of lapse