A kind of electroluminescence display device and its preparation method

Abstract

The invention provides an electroluminescent display device and a preparation method thereof, comprising a substrate, a cathode, an anode, a phosphor layer, an electron emitter and an isolation column, and the isolation column is formed for each field electron emitter from the cathode through a microchannel plate The upper corresponding area or the mutually isolated electron movement channel corresponding to the microchannel to the anode, the microchannel plate can effectively play the effect of electron multiplication, and the isolation column can play the role of controlling thickness, dividing pixels and insulating; The electroluminescent display device structure has a wide selection of device materials and a simple preparation process, and can improve device resolution, gray scale, contrast and other performances and reduce device cost.

Description

technical field [0001] The invention belongs to the display field, and in particular relates to an electroluminescence display device structure. Background technique [0002] Field electron emission refers to the emission that applies a strong electric field on the surface of an object to weaken the binding energy that prevents electrons from escaping from the object, and uses the tunneling effect to make it escape from the object. The field emission current density is closely related to the field strength of the applied electric field and the work function of the emitter. At present, the shapes of field emission cathodes include tapered and flat film types. The preparation process of tapered field emission cathodes is complex, difficult, and costly, and it is not easy to make large-area display devices; the flat film type generally adopts diamond film or diamond-like type. However, diamond is a material with negative electron affinity. Negative electron affinity allows ele...

AI Technical Summary

Problems solved by technology

At present, the shapes of field emission cathodes include tapered and flat film types. The preparation process of tapered field emission cathodes is complex, difficult, and costly, and it is not easy to make large-area display devices; the flat film type generally adopts diamond film or diamond-like type. However, diamond is a material with negative electron affinity. Negative electron affinity makes electrons migrate into the material, making it difficult to replenish electrons in the conduction band of the material. In addition, diamond has a high resistance, resulting in limited field emission performance.

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