| 摘要 |
Odd-order patch-like gate electrodes are, by gate lead lines, connected to a first electrode, even-order patch-like gate electrodes are, by gate lead lines, connected to a second gate electrode. The first and second gate electrodes are selectively and alternately operated. By making the potential of gate electrodes, which are not being selected, to be a low level, the patch-like gate electrodes, which are being operated, can be surrounded by low-level conductors. Thus, electrons emitted from the patch-like gate electrodes can be converged.
|
