Patent ID: 7485890
Filing Date: 2009-02-03
Classification: G03B

Abstract:
1. A line light irradiating method, comprising the steps of: i) locating an electroluminescent layer between a linear electrode and an opposite electrode, which stands facing the linear electrode, either one of the linear electrode and the opposite electrode being constituted of a light transmissive electrode, ii) supplying electric power across the electroluminescent layer, which is located between the linear electrode and the opposite electrode, via the linear electrode and the opposite electrode, iii) detecting an optical intensity of light radiated out from the electroluminescent layer, across which the electric power has been supplied, and iv) controlling the electric power, which is supplied across the electroluminescent layer, such that the thus detected optical intensity and a predetermined optical intensity, which has been set previously, become approximately identical with each other; wherein the detecting an optical intensity comprises correcting the detected optical intensity in accordance with either of a total number electrodes or a position of the linear electrode and opposite electrode.