Comdisco, Inc.

Other

Mark B Roberts

David F Baretich

William R Kallman

Leonard M Dorfman

John F Ahern

A power and control system for micro-electronics is described, as for lightweight, battery-powered electrochromic (EC) eyewear. Preferably such system includes a primary, lithium-type cell and a secondary, sealed lead acid-type cell in a hybrid, power-sharing configuration capable of supplying the low-energy, high-current (pulse) drain requirements of microelectronics, e.g. a switchable EC lens. A switch-mode power supply controller manages the power-sharing load on the hybrid battery system such that the secondary cell is charged by the primary cell. The system is capable of meeting short-term pulse drain requirements of switching EC lenses from clear to fully darkened at an acceptably fast rate and long-term operating life requirements of approximately 1500 cycles. The invented lead acid-type battery preferably is elongate, of uniform, right-rectangular cross section and provides over 20 mA-hours' capacity and the invented lithium-type battery preferably also is elongate, of uniform, right-rectangular cross section and provides over 180 mA-hours' capacity, all in a tiny volume compatible with one or more volume-restricted spaces. Preferably, the lithium-type and lead acid-type batteries are of approximately equal form factor and volume, for symmetric placement thereof in a void within either temple. The temples are hingedly connected with the eyewear's front piece via a unique leaf spring that biases the former into one of two orientations relative to the latter. Dual like-cell battery configurations also are disclosed, along with a flexible circuit defining one or more frame-mounted transmissivity switches. A microcontroller is described that fits within a tiny void formed in the eyewear's bridge. Finally an external, battery-powered battery charger case and circuit are described for use with EC eyewear powered by dual lead acid batteries.

Micro-electronic power supply for electrochromic eyewear

Electrochromic eyewear

Electrochromic eyewear system, rechargeable eyewear and external charger

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Beaverton, OR, United States of America

Mark B Roberts