FLUORESCENT DISPLAY TUBE DEVICE

PURPOSE:To eliminate uneven brightness and to reduce the cost of production and electric power consumption by setting the spacing between filaments at integer times the spacing between grids and impressing the driving voltages of the time width difference from each other on the respective groups div...

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Bibliographic Details
Main Author ARAI RYOICHI
Format Patent
LanguageEnglish
Published 04.12.1990
Subjects
ADVERTISING
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION
BASIC ELECTRIC ELEMENTS
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
PHYSICS
SEALS
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Summary:PURPOSE:To eliminate uneven brightness and to reduce the cost of production and electric power consumption by setting the spacing between filaments at integer times the spacing between grids and impressing the driving voltages of the time width difference from each other on the respective groups dividing the grids. CONSTITUTION:The fluorescent display tube of a graphic type having the striped grids 2, anodes 3 and filaments 1 extended in parallel between the grids 2 is constituted by changing the driving time widths of the driving voltage to be impressed to the grids 2 according to the distances of the grids 2 from the filaments 1, setting the time width of the driving voltage on the grid (for example, G4) further from the filaments 1 longer than the time width of the grid voltage of the grids (for example, G3, G5) closer to the filaments 1 at the time of driving the above-mentioned tube and setting the inter-filament spacing at integer times the inter-grid spacing. The number of the filaments is decreased by this constitution and the cost of production and the electric power consumption are reduced; in addition, the uneven brightness is prevented.
Bibliography:Application Number: JP19890113458