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US4283659A Expired / Lapsed US ⏱️ 0.0 years remaining

Display system utilizing incandescent lamp multiplexing

Assignee: Singer Co
•
Filing: 1980-04-07
•
Granted: 1981-08-11
•
Expires: 2000-04-07
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Abstract

Abstract A display system utilizing incandescent lamps arranged at the intersection points of a matrix array of row and column conductors includes a plurality of load resistors connecting the row conductors to a first voltage source and a plurality of load resistors connecting the column conductors to a second voltage source. To energize a selected lamp, the row conductor connected to that lamp is connected to the second voltage source and the column connected to that lamp is connected to the first voltage source.

Inventors

  • 👤 Howard L. Beckerman
  • 👤 William S. N. Trimmer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 00:29
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/24; H; H05; H05B; H05B39/00

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 200 words
A display system comprising: a first plurality of column conductors; a second plurality of row conductors; a plurality of voltage sensitive light emitting elements arranged at respective intersection points of a matrix array of said row and column conductors; a first voltage source at a first voltage level; a second voltage source at a second voltage level differing from said first voltage level by a first voltage difference; a first plurality of load resistors each connected between a respective one of said first plurality of column conductors and said first voltage source; a second plurality of load resistors each connected between a respective one of said second plurality of row conductors and said second voltage source; and means for connecting said first voltage source to one of said row conductors and said second voltage source to one of said column conductors; whereby the one light emitting element at the intersection point of said one column conductor and said one row conductor has said first voltage difference applied thereacross to relatively brightly light said one element and the remaining elements all have a second voltage difference less than said first voltage difference applied thereacross to relatively dimly light said remaining elements.
Claim 2
Dependent Claim 200 words
A display system comprising: a first plurality of column conductors; a second plurality of row conductors; a plurality of voltage sensitive light emitting elements arranged at respective intersection points of a matrix array of said row and column conductors; a first voltage source at a first voltage level; a second voltage source at a second voltage level differing from said first voltage level by a first voltage difference; a first plurality of load resistors each connected between a respective one of said first plurality of column conductors and said first voltage source; a second plurality of load resistors each connected between a respective one of said second plurality of row conductors and said second voltage source; and means for connecting said first voltage source to one of said row conductors and said second voltage source to one of said column conductors; whereby the one light emitting element at the intersection point of said one column conductor and said one row conductor has said first voltage difference applied thereacross to relatively brightly light said one element and the remaining elements all have a second voltage difference less than said first voltage difference applied thereacross to relatively dimly light said remaining elements.
Claim 3
Dependent Claim 14 words
The system according to claim 1 wherein said light emitting elements are incandescent lamps.
Claim 4
Dependent Claim 63 words
The system according to claim 1 wherein the number of column conductors equals the number of row conductors and the resistance value of each of said first and second pluralities of load resistors equals ##EQU4## where R equals the resistance value of a light emitting element with said second voltage difference applied thereacross and N equals the number of column or row conductors.
Claim 5
Dependent Claim 64 words
The system according to claim 1 wherein there are M column conductors and N row conductors and the resistance value of each of said first plurality of load resistors equals ##EQU5## and the resistance value of each of said second plurality of load resistors equals ##EQU6## where R equals the resistance value of a light emitting element with said second voltage difference applied thereacross.

References Cited (Backward Citations)

US3573788A Cited
US3689889A Cited
US3623066A Cited
US3585629A Cited
US3684918A Cited
US3733435A Cited
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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-08-10 1985-02-09 1985-08-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-08-10 1989-02-09 1989-08-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-08-10 1993-02-09 1993-08-11 $7700.00 Window Closed / Lapsed

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