Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Patent
1978-07-19
1980-07-01
Smith, Alfred E.
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
340781, H05B 3700, H05B 3900, H05B 4100
Patent
active
042108489
ABSTRACT:
For a thin-film EL display panel which exhibits the hysteresis loop phenomenon in the applied voltage versus brightness relationship, a string of alternating sustain pulses are applied, the amplitude of which is chosen at the voltage level appearing at the point in the hysteresis loop characteristics where the difference between the minimum light brightness on the voltage increasing curve and the maximum light brightness on the voltage decreasing curve is substantially a maximum. A flash lamp, for example, a xenon lamp which releases light beams toward the thin-film EL display panel, is energized in synchronism with the application period and pause period of the alternating sustain pulses. There are provided means for controlling the application period of the alternating sustain pulses and the illumination period of the flash lamp in accordance with the light activated write mode or erase mode. The light beams can be applied to the thin-film EL display panel via a film bearing an optical image to be written or erased.
REFERENCES:
patent: 3975661 (1976-08-01), Kanatani et al.
Topics in Applied Physics--Electroluminescence, vol. 17, edited by J. I. Pankove, Springer-Verlag, 1977, pp. 197-210.
Electronics, Jul. 6, 1978, p. 33.
Inazaki Kenzo
Ise Masahiro
Machino Katsuyuki
Suzuki Chuji
Sharp Kabushiki Kaisha
Smith Alfred E.
Wise Robert E.
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