MATRIX SCREEN USING ELECTRON-REFLECTION BASED FIELD EMISSION Russian patent published in 2003 - IPC

FIELD: low-voltage means using cathodic luminescence for information display. SUBSTANCE: proposed matrix screen that can be used for digital and alphanumeric displays, universal panels for visualizing any kind of information such as texts, characters, graphics, reading devices of analog and digital-analog measuring instruments for calculators, clocks, shared display panels, and the like has vacuum envelope assembled of two flat glass plates and substrate carrying following insulator-separated electrodes: first anodes of conductive layer and thin flat butt- end emitters jointly connected through anode and emitter buses to respective leads for connecting power supplies and insulating frame that hermetically joins plate and substrate; inner surface of plate carries in addition second anodes of conducting material covered with phosphor; emitters and first anodes are made in the form of matrix structure for reflecting part of electron current in direction of second anode; emitter buses are made in the form of lines orthogonal to anode buses and each emitter bus is electrically insulated from other buses. In addition carbon film is used as emitter; preset distance between flat glass plate and substrate ensures desired spatial definition of information being displayed. EFFECT: enhanced mechanical endurance and service life of device. 3 cl, 5 dwg