ELECTRON EMISSION SOURCE ARRAY, IMAGING DEVICE AND DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide an electron emission source array in which both aimed at securing both of a focusing effect and an emission electron amount, and to provide an imaging device and a display device.SOLUTION: The electron emission source array includes an electron emission source arranged in a matrix form and demarcated into pixel regions; a plurality of emitter electrodes which are connected to the electron emission source and are arrayed in a line shape; a gate electrode which is arranged in an upper side of the electron emission source and is arranged in a direction crossing the plurality of the emitter electrodes in a plan view; and a focusing electrode which is arranged in an upper side of the gate electrode and forms a static lens for focusing the electrons emitted from the electron emission source. When the electron emission source emits electrons to each of one or a plurality of pixel regions, the focusing electrode is impressed with a focusing voltage for forming the static lens in a larger region than the pixel region.