Functional application of photochromic compound materials to...

Details Functional application of photochromic compound materials to... Functional application of photochromic compound materials to...

2006-05-16

2006-05-16

Tso, Laura K. (Department: 2875)

Illumination

Light source or light source support and luminescent material

C040S543000, C250S483100, C362S109000, C362S253000, C362S806000, C362S362000, C362S034000

Reexamination Certificate

active

07044614

ABSTRACT:
A device (50) capable of selectively altering its appearance can include a housing portion (64) of the device having at least one photochromic compound and an ultraviolet light source (60) forming a portion of the device for exposing the portion of the device having the photochromic compound to the ultraviolet light source. A reaction by the photochromic compound can provide or serve as a status indicator for the device. The device can be any number of devices such as a portable communication device, a personal digital assistant, a laptop computer, a camera, a GPS device, a printer, a camcorder, a vehicle, a toy, a personal hygiene device, a watch, a calculator, and a writing instrument for example. The device can be formed so that reactions by the photochromic compounds within the device are controlled solely by the ultraviolet light sources (54and60) within the device.

REFERENCES:
patent: 6514460 (2003-02-01), Fendrock
patent: 6555028 (2003-04-01), Walters et al.
patent: 6860616 (2005-03-01), Yu et al.
patent: 6942362 (2005-09-01), Deutsch et al.
patent: 2003/0210780 (2003-11-01), Pratt et al.
patent: 2004/0062038 (2004-04-01), Donovan
patent: 2004/0136180 (2004-07-01), Lewis et al.

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