Communications: electrical – Visual indication – Using light emitting diodes
Reexamination Certificate
2000-10-18
2001-12-11
Lefkowitz, Edward (Department: 2632)
Communications: electrical
Visual indication
Using light emitting diodes
C340S815530, C340S815560, C340S815650, C345S111000
Reexamination Certificate
active
06329926
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to the field of visual displays in which the nature of graphical, pictorial, numerical, decorative and other visual material can be changed in, for example, colour, shape, intensity, and the nature of information conveyed to a viewer.
The invention further relates to the field of electronic instruments for indicating and measuring variable parameters such as time, temperature, viscosity, and density, and for indicating states such as achievement of or regression from a limit of a variable parameter.
OBJECTS OF THE INVENTION
An object of the invention is to provide an improved visual display, incorporating a plurality of light emitting diode elements each of which is adapted to emit a respective colour when energised, in which such diode elements are juxtaposed in such a manner that by appropriate energisation of one or more of the diode elements, the diodes can be caused to display material in a manner which can be varied as to colour and/or content.
Another object of the invention is to provide methods of operating such displays for variation, of display of material, as to colour and/or content.
A still further object of the invention is to provide an electronic instrument having pairs of light emitting diode elements which, when energised, are of different respective colours and which are so arranged relative to each other that when energised simultaneously they display another colour which is a derivative of their respective colours.
A still further object of the invention is to provide an arrangement, of pairs or groups of three or more light emitting diode elements, which permits display, when the elements are energised, of almost all of the letters of the alphabet and also the numerals from “0” to “9” with a clarity hitherto obtainable only with a much great number of diode elements.
SUMMARY OF THE INVENTION
According to the invention there is provided a visual display comprising a plurality of light emitting diode elements some of which are adapted to emit a respective colour when energised, elements adapted to emit respective different colours being juxtaposed such that when at least two of said juxtaposed elements are energised they together generate a further colour which is a derivative of their respective colours.
Further according to the invention there are provided methods of operating such displays for variation of the display as to colour and/or content of the display. According to another feature of the invention there is provided an electronic instrument having a display comprising a group of light emitting diode elements, the diode elements of a first portion of the group being of a first colour when energised, the diode elements of a second portion of the group being of a second colour when energised, the respective individual diode elements of the first portion of the group being each juxtaposed to a respective individual diode element of the second portion of the group such that when both of the juxtaposed diode elements are energised at the same time they collectively display a third colour which is a derivative of their respective colours.
REFERENCES:
patent: 4705406 (1987-11-01), Havel
patent: 4707171 (1987-11-01), Havel
patent: 4845745 (1989-07-01), Havel
patent: 4929936 (1990-05-01), Friedman et al.
Hollander Steven
Leontiev Daniel
Nastase Stefan Serban
Drucker William A.
Goins Davetta W.
Lefkowitz Edward
Newport Electronics, Inc.
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