| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent white or black stripes on an image from generating by eliminating eccentricity of a luminance distribution of each of LED elements in a main scanning direction even when attached positions of individual electrodes are slightly varied. SOLUTION: An individual electrode 4 which is drawn from a light emission section 6 of each LED element 3 in a sub-scanning direction has a width not less than that of the light emission section 6. As a result, even in the case where attached positions of the individual electrodes 4 to the light emission sections 6 are slightly varied, eccentricity of a luminance distribution in the main scanning direction is not generated (c) when each individual electrode 4 having the great width is overlapped with the light emission section 6, thereby preventing a black or white stripe from being created on a formed image D (d).</p> |
