Optical: systems and elements – Glare or unwanted light reduction
Reexamination Certificate
2000-04-18
2001-05-22
Sikder, Mohammad (Department: 2872)
Optical: systems and elements
Glare or unwanted light reduction
C359S602000, C359S603000, C359S265000, C359S267000
Reexamination Certificate
active
06234636
ABSTRACT:
BACKGROUND OF THE INVENTION
There are known motorcar mirrors, which can be dipped and comprise an electrochromic layer system, wherein the electrochromic substances are formed as gels or liquids. The electrochromic substances are collected inside a layer structure having electrode layers, further reaction layers of a mirror layer, if necessary, and a final glass. The motorcar mirror having such a layer structure includes a sensor arrangement for radiation impinging upon the mirror, and depending on the signals of one or more sensors the electrochromic layer is triggered via the electrodes such that the transmission of the layer is controlled depending on the brightness.
With these well-known mirrors and layer structures, respectively, the electrochromic liquid or gel-like layer has to be sealed outwards, whereby the manufacturing effort is increased. Moreover, it is extremely difficult with the curved mirrors to constantly maintain the distance between the limiting surfaces of the electrochromic layer and thus the curvature thereof. If the distance of the limiting surfaces and its curvature, respectively, change to each other, the optical features deteriorate.
SUMMARY OF THE INVENTION
The subject invention is an electrochromic layer system for motorcar mirrors comprising a first transparent, electrically conductive layer serving as an electrode, which is deposited upon a glass carrier, a electrochromic layer, a second electrically conductive layer serving as a backplate electrode and a reflecting layer. The system is characterized by the electrochromic layer comprising an oxidation-reduction layer deposited on the electrode.
Hence the invention is based on the object, to provide an electrochromic layer structure, in particular for motorcar mirrors, which is less expensive in its structure and comprise good optics.
As a result of forming the electrochromic layer as an oxidation-reduction layer directly deposited upon the electrode, on the one hand, and as an organic polymer layer having a conjugate double bond system, on the other hand, layer thicknesses may be exactly observed, in particular with curved substrates as well, such that the optics of the mirror are not impaired. Moreover, manufacturing the mirror is simpler, since the layer structure does not have to be sealed.
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Macher David
Zorn Heinz
Clark Hill PLC
Magna Reflex Holding GmbH
Sikder Mohammad
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