SE8701769D0 - OPTICALLY ACTIVABLE LIGHT CELL - Google Patents

OPTICALLY ACTIVABLE LIGHT CELL

Info

Publication number
SE8701769D0
SE8701769D0 SE8701769A SE8701769A SE8701769D0 SE 8701769 D0 SE8701769 D0 SE 8701769D0 SE 8701769 A SE8701769 A SE 8701769A SE 8701769 A SE8701769 A SE 8701769A SE 8701769 D0 SE8701769 D0 SE 8701769D0
Authority
SE
Sweden
Prior art keywords
circuit
light
discriminator
light source
logic
Prior art date
Application number
SE8701769A
Other languages
Swedish (sv)
Other versions
SE455253B (en
Inventor
Sten Trolle
Original Assignee
Sten Trolle
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 Sten Trolle filed Critical Sten Trolle
Priority to SE8701769A priority Critical patent/SE455253B/en
Publication of SE8701769D0 publication Critical patent/SE8701769D0/en
Publication of SE455253B publication Critical patent/SE455253B/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
    • G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/34—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp to provide a sequence of flashes

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

Light with a strength which is less than a predetermined level (LO) and daylight or other continually or slowly varying light are filtered from the input by an HPF (8). An activation circuit (3) is coupled to the discriminator (2) to operate the light source. The discriminator circuit emits a logic signal indicating whether the monitored light will activate the light source or not. The activation circuit (3) includes an oscillator (12) which in conjunction with the logic signal causes a trigger circuit (14) to emit a sequence of trigger pulses. The light source comprises a gas discharge lamp (10) connected to a power source via a charging circuit provided with a capacitor (5), and on receipt of the trigger pulses emits a corresp. sequence of light flashes. The outputs of the oscillator (12) and discriminator circuit (2) are connected to a logic circuit (13) in the activation circuit, the logic circuit comprising an AND grid (13).
SE8701769A 1987-04-29 1987-04-29 Optically activatable device with light source SE455253B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8701769A SE455253B (en) 1987-04-29 1987-04-29 Optically activatable device with light source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8701769A SE455253B (en) 1987-04-29 1987-04-29 Optically activatable device with light source

Publications (2)

Publication Number Publication Date
SE8701769D0 true SE8701769D0 (en) 1987-04-29
SE455253B SE455253B (en) 1988-06-27

Family

ID=20368353

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8701769A SE455253B (en) 1987-04-29 1987-04-29 Optically activatable device with light source

Country Status (1)

Country Link
SE (1) SE455253B (en)

Also Published As

Publication number Publication date
SE455253B (en) 1988-06-27

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