Device for generating light signals
First Claim
1. A device for generating light signals comprising:
- (a) a housing having an interior and at least one opening, (b) at least one plate having an absorption that is electrically controllable and closing the at least one opening, and (c) a diffuser element for reflecting incident light through the plate and located in the interior of the housing behind the at least one opening, wherein the housing has three round openings arranged one above another and each of which is, respectively, closed by a plate, so that it is possible for each plate to be switched electronically between the switched states of colored transparent and black, and the absorption spectrum of the uppermost plate permits only transmission of red light, the middle plate permitting only the transmission of red and green light and the lower plate permitting only the transmission of green light.
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Accused Products
Abstract
The present invention relates to a device for generating light signals, in particular traffic lights. The device according to the invention contains a housing with at least one opening, which is closed by a plate, the absorption of which can be controlled electrically, there being located in the interior of the housing behind the opening a diffuser element, which reflects incident light through the plate. Preferred switched states of the plate are either black (absorption over the entire spectral region of visible light) and colored transparent (slight absorption in specific spectral regions) or transparent (no absorption over the entire spectral region of visible light). The device according to the invention is used to generate light signals by virtue of the fact that the ambient light strikes the plate and, depending on switched state, is absorbed entirely, partially or not at all by the plate. The light fraction transmitted through the plate is reflected by the diffuser plate located behind the plate and transmitted a second time through the plate, and can then be perceived from outside.
16 Citations
24 Claims
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1. A device for generating light signals comprising:
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(a) a housing having an interior and at least one opening, (b) at least one plate having an absorption that is electrically controllable and closing the at least one opening, and (c) a diffuser element for reflecting incident light through the plate and located in the interior of the housing behind the at least one opening, wherein the housing has three round openings arranged one above another and each of which is, respectively, closed by a plate, so that it is possible for each plate to be switched electronically between the switched states of colored transparent and black, and the absorption spectrum of the uppermost plate permits only transmission of red light, the middle plate permitting only the transmission of red and green light and the lower plate permitting only the transmission of green light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
a) the reducible substance has at least one or at least two chemically reversible reduction waves in the cyclic voltammogram, and the oxidizable substance correspondingly has at least one or at least two chemically reversible oxidation waves, or b) the reducible substance and the oxidizable substance are bonded to one another covalently via a bridge or c) the reducible and/or oxidizable substances are selected as those in which the reversible transition between the oxidizable form and the reducible form, or vice versa, is associated with the rupture or formation of a σ - bond, or
d) the reducible substance and/or the oxidizable substance are/is metal salts or metal complexes from those metals which exist in at least two oxidation stages, or e) the reducible substance and/or the oxidizable substance are/is oligomers and polymers which contain at least one of the said redox systems, or pairs of such redox systems such as are defined under a) to d), or f) mixtures of the substances described in a) to e) are used as reducible and/or oxidizable substance, assuming that these mixtures contain at least one reducible and at least one oxidizable redox system.
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Specification