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US 4,688,029 AGranted
Analog display device
AssigneeFutaba Denshi Kogyo K.K.
InventorsHiroaki Kawasaki, Nobumitsu Kanetsuna
Life of this patent
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Abstract
An analog display device is disclosed which is capable of accurately displaying warning about input data. The device comprises a plurality of high range display segments and a plurality of low range display segments which are of any shape and alternately arranged in parallel to one another. At least a part of the low range display segments carries out display of color different from that of the high range display segments.
Claims13
An analog display device comprising:
- a plurality of range scales each being capable of independent illumination;
- a level display section having a plurality of high range display segments for indicating the remaining amount of the quantity being measured as a fraction between the maximum measurable amount of the quantity being measured a predetermined amount less than the maximum measurable amount of the quantity being measured and a plurality of low range display segments for indicating the remaining amount of the quantity being measured as a fraction between zero and the predetermined amount, said high and low range display segments being interspersed alternately arranged and in parallel to one another;
- a level selection circuit for generating a high level signal when the magnitude of the quantity being measured is above the predetermined amount and for generating a low level signal when the magnitude of the quantity being measured is decreased below the predetermined amount and for selectively illuminating one of said range scales in response to said high level and low level signals;
- a high range level comparator driver connected to each of said high range display segments for selectively illuminating said high range display segments depending upon the remaining amount of the quantity being measured:
- a low range level comparator driver connected to each of said low range display segments for selectively illuminating said low range display segments depending upon the remaining amount of the quantity being measured;
- and
- a range display section connected to said level selection circuit for indicating whether the remaining amount of the quantity being measured is above or below the predetermined amount.
4 more elements
An analog display device comprising:
- a plurality of range scales each being capable of independent illumination;
- a level display section having a plurality of high range display segments for indicating the remaining amount of the quantity being measured as a fraction between the maximum measurable amount of the quantity being measured and a predetermined amount less than the maximum measurable amount of the quantity being measured and a plurality of low range display segments for indicating the remaining amount of the quantity being measured as a fraction between zero and the predetermined amount, said high and low range display segments being interspersed alternately and in parallel to one another, and means for selectively illuminating one of said range scales in response to said measured amount of said quantity being measured;
- a driver connected to each of said high range and low range display segments for selectively illuminating said high range and low range display segments depending upon the remaining amount of the quantity being measured;
- a means for controlling the luminance of said display segments, said means for controlling the luminance of said display segments being connected to said driver;
- a high range comparator connected to said means for controlling the luminance of said display segments for selecting said high range display segments depending upon the remaining amount of the quantity being measured;
- and
- a low range level comparator connected to said means for controlling the luminance of said display segments for selecting said low range display segments depending upon the remaining amount of the quantity being measured.
4 more elements
Dependencies are inferred from the claim text.