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US 7,599,109 B2Granted
Security device
AssigneeHewlett-Packard Development Company, L.P.
InventorsDavid A. Champion, Chinmay Suresh Betrabet
Life of this patent
Estimating the term…
Abstract
Embodiments of a security device utilizing electrochromic material are disclosed.
Claims21
A security device, comprising:
- a first electrode member;
- a second electrode member including a transparent security display region;
- and
- an electrochromic material positioned between said first electrode member and said second electrode member in said transparent security display region.
1 more element
A method of using a security device, comprising:
- generating a potential difference between a first electrode and a second electrode of a security device, said second electrode including a transparent region;
- said potential difference moving an electrochromic material positioned between said first and second electrodes from an unactivated condition to an activated condition;
- and
- said electrochromic material in said activated condition generating a visible security indication through said transparent region of said second electrode.
1 more element
A method of making a security tag, comprising:
- forming a layered structure including a first electrode, a second electrode including a transparent security display region, and an electrochromic material positioned between said first and second electrodes.
Dependencies are inferred from the claim text.