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US3827042A Expired / Lapsed US ⏱️ 0.0 years remaining

Illuminated display device providing continuous light gradation

Assignee: FOK GYEM FINOMMECH ELEKT
•
Filing: 1973-02-05
•
Granted: 1974-07-30
•
Expires: 1993-02-05
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Abstract

Abstract An illuminated information and advertising device provides continuous light gradation, in white or colored lights. The incandescent lamps are preheated in an electronically controllable manner independently of the information indication. During the course of the indication of information, the brightness of the incandescent lamp can be varied continuously with electronic means in accordance with a given program. The storage and switching elements of the illuminated board can also be controlled by means of bipolar signals and are also provided with separately controllable inputs for varying the light gradation and/or for the preheating. This controllability ensures the compatability of the electronic control circuit of the illuminated board with the electronic control circuit of the color contrast devices, which are equipped with magnetic indicating elements; thus, it is possible to operate, in conjunction with an outdoor lighted board, easily readable color contrast devices disposed indoors, by means of which complete control can be exercised.

Inventors

  • 👤 J Mandzsu
  • 👤 L Kellner
  • 👤 S Jodal
  • 👤 L Jagicza
  • 👤 A Peter

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 20:52
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/307; H; H05; H05B; H05B39/00; H05B39/04; H05B39/041; H05B39/044; Y; Y02; Y02B; Y02B20/00

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 90 words
In an illuminated display device comprising a plurality of incandescent lamps arranged so as to comprise indicia, an information input unit, and power supply means for said lamps; the improvement comprising means for providing continuous light gradation of said lamps and comprising, in association with each said incandescent lamp, at least one input controlling the light gradation of the incandescent lamp and free from synchronization with respect to said power supply means, at least one information input for said lamp, and means to provide bipolar signals to said information input.
Claim 2
Dependent Claim 90 words
In an illuminated display device comprising a plurality of incandescent lamps arranged so as to comprise indicia, an information input unit, and power supply means for said lamps; the improvement comprising means for providing continuous light gradation of said lamps and comprising, in association with each said incandescent lamp, at least one input controlling the light gradation of the incandescent lamp and free from synchronization with respect to said power supply means, at least one information input for said lamp, and means to provide bipolar signals to said information input.
Claim 3
Dependent Claim 44 words
A device as claimed in claim 1, said input for said lamp comprising a Schmitt trigger with large hysteresis, said trigger comprising inverters such that one invention level corresponds to a positive signal polarity and another inversion level corresponds to a negative signal polarity.
Claim 4
Dependent Claim 25 words
A device as claimed in claim 1, in which plural inputs control the light gradation of the incandescent lamp, said inputs being combined in groups.
Claim 5
Dependent Claim 23 words
A device as claimed in claim 3, and means controlling said groups by means of signals chronologically shifted with respect to one another.
Claim 6
Dependent Claim 39 words
A device as claimed in claim 1, there being a plurality of said inputs for said lamp one of which ensures preheating of the lamp and at least another of which controls the continuous light intensity of the lamp.
Claim 7
Dependent Claim 22 words
A device as claimed in claim 1, and means controlling said input for said lamp by means of a variable pulse width.
Claim 8
Dependent Claim 21 words
A device as claimed in claim 1, and a closed control circuit in which said input for said lamp is disposed.

References Cited (Backward Citations)

US3307170A Cited
US3432846A Cited
US3651511A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-07-29 1978-01-28 1978-07-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-07-29 1982-01-28 1982-07-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-07-29 1986-01-28 1986-07-30 $7700.00 Window Closed / Lapsed

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