06156450 is referenced by 39 patents and cites 78 patents.

The battery testing circuit of the present invention preferably includes a substrate, a display printed on the substrate for displaying a level of discharge of a battery, a display driver circuit coupled to the display and to the battery for receiving power from the battery to drive the display, and a battery discharge level sensing circuit coupled to the display and to the battery for sensing a discharge level of the battery and for supplying a display signal representing the sensed discharge level to the display. At least one of the circuits is printed on the substrate using processable conductive polymer materials as ink layers. Preferably, the battery discharge level sensing circuit component continuously senses the discharge level and the display continuously displays the discharge level. The display is preferably a field-responsive liquid crystal display made of either polymer liquid crystal or polymer dispersed liquid crystal material. The display may be formed of one or more layers of active liquid crystal material. The display driver circuit is preferably an oscillator that may also be printed on the substrate.

Title
Battery tester having printed electronic components
Application Number
8/900037
Publication Number
6156450
Application Date
July 24, 1997
Publication Date
December 5, 2000
Inventor
John C Bailey
Columbia Station
OH, US
Agent
Russell H Toye Jr
Assignee
Eveready Battery Company
MO, US
IPC
H01M 10/48
View Original Source