A light source has a light emission section comprising a two-dimensional
array of electron emitters and a drive circuit for applying a drive
voltage to each of the electron emitters of the light emission section.
The drive circuit applies the drive voltage between upper and lower
electrodes of each of the electron emitters based on a control signal
representative of turn-on/turn-off from an external source (a
turn-on/turn-off switch or the like), for thereby controlling each of the
electron emitters. Each of the electron emitters has a plate-like
emitter, an upper electrode disposed on a face side of the emitter, and a
lower electrode disposed on a reverse side of the emitter.