Portable electroluminescent back light
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United States of America Patent
Stats
-
Jul 9, 1991
Grant Date -
N/A
app pub date -
Nov 23, 1988
filing date -
Nov 23, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A back light for a liquid crystal display has a self-contained power source and can be attached to the unit having the liquid crystal display when needed in a dark ambient, and removed from the display or not carried by the user of the display when not needed. This portable back light allows the unit with the liquid crystal display to be smaller and lighter in weight than a unit having a built-in back light, and to require a smaller power supply than a unit with a built-in back light. Additinally batteries supplying power to a liquid crystal display unit will last longer. Yet with this portable back light, the user has the convenience of sufficient brightness for viewing the liquid crystal display unit when needed.
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