FLAT SCREEN HAVING INDIVIDUALLY DIPOLE-PROTECTED MICRODOTS

摘要

A flat screen having individually dipole-protected microdots and consisting of a field-emission cathode comprising microdots (12) individually protected by means of a series electrical coupling with a dipole (13) consisting of a depletion mode field effect transistor, said dipoles being designed to enable the protection threshold and the emission current level to be altered on all dots at once solely by changing the biasing of the substrate (14) common to said dipoles. Application in general to the field of display screens.