Electro luminescence device and electrophotographic printing system using the same.

摘要

An EL device has an electrode arrangement including first electrodes (l6) and at least one row of second electrodes (l2) intersecting the first electrodes and energized by a combination of the first and second electrodes. The second electrode is divided into a plurality of sub-electrodes. A possible electrode arrangement is such that the first electrodes are grouped in a plurality of groups and corresponding electrodes in the groups are commonly-connected and intersect different sub-electrodes. Another possible electrode arrangement is such that the first electrodes are arranged in a belt form and intersect different sub-electrodes in a meander manner.

The EL device can be applied to an electrophoto­graphic printing system as an optical system for forming a latent image. EL elements are repeatedly energized with the same data to give a sufficient intensity of light on a light sensitive medium, and deenergized for a time in which the intensity is decreased to a low level.

Such constructional forms can result in circuitry of reduced size and increased efficacy.