| 摘要 |
<p>PURPOSE:To change the density of a picture element by changing the number of picture element constituting ingredients which are printed in the picture element, and make an expression of half tone possible by a method wherein a line head, for which end surface luminescent type EL elements, having specific shape are continuously provided in an array state, is provided, and a picture element pattern changing means, which can freely change the pattern of the picture element which have been set in a picture element pattern memory unit, is provided. CONSTITUTION:End surface luminescent type EL elements 2, which are used for an end surface luminescent type EL printer 1, emit light from light from an active layer 3 when a high voltage pulse is impressed between flat electrodes 6 and 7. The beam shape of this emitted light is flat. The end surface luminescent type EL printer 1 compacts printing data, which is input, and temporarily stores. One main scanning line is formed by 4 times of light scanning. This corresponds to the fact that the emitted light of the end surface luminescent type EL elements 2 is extremely flat, and an approximately square shaped picture element 25 is formed by arranging flat picture elements 24, which are printed by single emitted light, continuously in the sub scanning direction. For this reason, this end surface luminescent type EL printer 1 expresses half-tone by changing the area ratio of black and white in one picture element 25 by changing the number of the picture element constituting ingredients 24 which form one picture element 25.</p> |
