Analog graphic display method and apparatus
Abstract
Disclosed are an apparatus and method for using an output device such as an LED to show the approximate analog level of a variable electrical signal wherein a modulating AC waveform is superimposed either on the signal or a reference voltage, both of which are then fed to a comparator which drives the output device. Said device flashes at a constant perceptible rate with a duty cycle which varies in response to variations in the level of the input signal. The human eye perceives these variations in duty cycle as analogous to variations in the level of the input signal. 21 figures.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7083839
- Patent Number(s):
- 5039978
- Application Number:
- PPN: US 7-461964
- Assignee:
- PTO; EDB-94-111368
- DOE Contract Number:
- AC09-76SR00001
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 8 Jan 1990
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; DISPLAY DEVICES; DESIGN; ANALOG SYSTEMS; COMPARATOR CIRCUITS; LIGHT EMITTING DIODES; SIGNALS; COMPUTER OUTPUT DEVICES; COMPUTER-GRAPHICS DEVICES; ELECTRONIC CIRCUITS; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES; 426000* - Engineering- Components, Electron Devices & Circuits- (1990-)
Citation Formats
Kronberg, J W. Analog graphic display method and apparatus. United States: N. p., 1991.
Web.
Kronberg, J W. Analog graphic display method and apparatus. United States.
Kronberg, J W. Tue .
"Analog graphic display method and apparatus". United States.
@article{osti_7083839,
title = {Analog graphic display method and apparatus},
author = {Kronberg, J W},
abstractNote = {Disclosed are an apparatus and method for using an output device such as an LED to show the approximate analog level of a variable electrical signal wherein a modulating AC waveform is superimposed either on the signal or a reference voltage, both of which are then fed to a comparator which drives the output device. Said device flashes at a constant perceptible rate with a duty cycle which varies in response to variations in the level of the input signal. The human eye perceives these variations in duty cycle as analogous to variations in the level of the input signal. 21 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {8}
}
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