(57) It is an object of this invention to provide an electron generating apparatus which
eliminates, with a simple process, variations in electron-emitting characteristics
of electron sources caused by various factors, a method of adjusting the characteristics
of the electron generating apparatus, a method of manufacturing the electron generating
apparatus, and an image forming apparatus using the electron generating apparatus.
Characteristic measuring voltages are applied from pulse generators (6, 7) to each
surface-conduction emission device of a display panel (1), so that the electron-emitting
characteristics are measured by a current detector (12). A pulse peak value setting
circuit (8) is controlled to output a voltage signal having a peak value determined
in the above manner, and characteristic shift voltages are applied from the pulse
generators (6, 7) to the surface-conduction emission device. With this process, the
electron-emitting characteristics of the surface-conduction emission devices are equalized.
The characteristic shift voltage is higher than the characteristic measuring voltage,
and the characteristic measuring voltage is higher than a driving voltage.
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