Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Patent
1977-11-25
1979-04-10
Curtis, Marshall M.
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
340767, 340771, 365116, 340814, G06F 314, G08B 536
Patent
active
041491114
ABSTRACT:
A method and apparatus for modulating the perceptible intensity of the presentation of a light emitting display which light emitting display emits light by gas discharge and recombination of ions and free electrons of a display medium; includes a system clock, the interruption of which causes the interruption of the presentation of the light emitting display; and is capable of retaining display information upon the interruption of a light sustaining signal or the electrical power as a result of an accumulation and retention of electrical charge across the display medium. The apparatus comprising a repetition means for generating a repetition pulse train signal having a controllable frequency and duty cycle; an indication means for generating a retention signal that identifies when the light emitting display is capable of retaining display information; a synchronization means coupled to said repetition means and to said indication means for generating a gating signal which is synchronized with the retention signal and the repetition pulse train signal; and stopping means coupled to said synchronization means for interrupting the system clock in synchronization with the gating signal. Variations of this invention include circuitry which generates a control system clock signal by clock pulse train generator and modified stopping means. Other variations enable the light emitting display to be turned off over extended periods of time.
REFERENCES:
patent: 3098215 (1963-07-01), Waite
patent: 3798632 (1974-03-01), Liddle
patent: 3821721 (1974-06-01), Hughes
patent: 3863023 (1975-01-01), Schmersal et al.
patent: 4087806 (1978-05-01), Miller
Curtis Marshall M.
Haller John L.
Science Applications, Inc.
Verbeck Bruno J.
LandOfFree
Method and apparatus for modulating the perceptible intensity of does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for modulating the perceptible intensity of, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for modulating the perceptible intensity of will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1073988