| 摘要 |
<p>PURPOSE:To facilitate the positioning of a modulating electrode and an electron discharge portion and make manufacture simple, by making the width of a low potential side electrode larger than that of a high potential side electrode which, together with the low potential side electrode, pinches an electron beam generator electron discharge portion, and arranging a modulating electrode on either side of the two sides. CONSTITUTION:An electron discharge element is desired to be a cold cathode, and above all, the one called a surface conduction form discharge element is preferable. A modulating electrode is arranged on either side of the electrodes pinching an electron discharge 36, but arranging it on the high potential side element electrode 35 side is preferred. Also, the width of a low potential electrode is made larger than that of a high potential electrode. As a result, the precision of an image element is effectively improved, and as an electron beam emitted from an electron discharge portion is cut off, the increase of the absolute value of voltage impressed on an modulating electrode is restrained. On the same surface of a base 31, surface conduction form electron discharge elements and modulating electrodes 40 are provided, and beam electron sources are formed by arranging a plurality of electron discharge portions 36 between element wiring electrodes 34a and 34b. Modulating electrodes 40 are connected to modulation wiring electrodes 41 through the contact holes of insulator films 33.</p> |
