Computer graphics processing and selective visual display system – Plural physical display element control system – Segmented display elements
Patent
1996-05-16
1998-09-01
Bayerl, Raymond J.
Computer graphics processing and selective visual display system
Plural physical display element control system
Segmented display elements
345 39, 345 44, 345 45, 345 55, 345 76, B08B 536
Patent
active
058016686
ABSTRACT:
A small hand-held electronic apparatus with a field effect light emitting device wherein the life of an EL panel is expanded; light emitting efficiency is improved; the circuit is made compact; and the number of parts is reduced. When a control signal from a charge/discharge frequency control means becomes a low level, a first step-up selection SW is turned on and a first discharge means is turned off. At this time, a step-up device and a first step-up means are connected, and the first step-up means starts a step-up operation in response to a step-up clock signal. A reverse induction voltage generated by the step-up operation is rectified by a first rectifier means and is input to a light emitting device. The light emitting device charges and accumulates reverse induction voltage input at each clock of the step-up clock and emits light to provide an illuminating function. When the control signal is switched from the low level to the high level, the first step-up selection SW is turned off and the first discharge means is turned on. Thus, the accumulated charge is discharged. The same operation is continuously performed thereafter. As a result, the light emitting device emits light continuously to serve as an illumination device.
REFERENCES:
patent: 3911423 (1975-10-01), Arndt et al.
patent: 3992873 (1976-11-01), Awalt
patent: 4298869 (1981-11-01), Okano
patent: 4420711 (1983-12-01), Takahashi
patent: 5155615 (1992-10-01), Tagawa
patent: 5349269 (1994-09-01), Kimball
patent: 5612549 (1997-03-01), Nelson et al.
Bayerl Raymond J.
Kovalick Vincent E.
Seiko Instruments Inc.
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