Instrument illuminating arrangement
AssigneePforzheimer Uhren-Rohwerke PORTA GmbH
InventorsHans-Joachim Wehner, Wolfgang Burkhardt
Life of this patent
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Abstract
An instrument illuminating arrangement for the glare-free illumination of indicators such as characters of the instrument display area or, especially of movable hands or movable displays or electronically variable characters, has an excitation source which is so arranged as to irradiate the surfaces of the indicators and cause them to emit visible light. Preferably the excitation source generates light energy at least to some extent in the invisible range and the indicators' surfaces are provided with luminophors which convert the invisible light into visible light so that the light energy supplied to the indicators will not disturb the operator of, for example, a vehicle equipped with such instruments.
Claims17
In an instrument illuminating arrangement for glare-free illumination of indicators such as characters of the display area of the instrument, especially for instruments with movable indicators such as hands or movable displays or electronically variable characters, said indicators having a light-emitting surface, an energy emitting excitation source disposed in the vicinity of said display area and adapted to emit invisible energy and so arranged as to irradiate said light-emitting surface, said light emitting surface being adapted to be excited by said invisible energy so as to emit light in the visible range.
Dependencies are inferred from the claim text.