| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electron emission device and an image-forming unit with improved electron emission efficiency, while obtaining a beam with high precision by controlling emitted electron orbit with a simple structure. SOLUTION: The tip an emitter 5 is constituted so as to extend from the low-potential electrode 2 toward a gate 4 is located near the outer wall of the gate 4, and the direction of electric field formed between the low-potential electrode 2 and gate 4 is set nearly parallel to that formed between the low- potential electrode 2 and the anode 6.</p> |
