An electroluminescent display device and a manufacturing method thereof

Abstract

The invention provides an electroluminescent display device and a manufacturing method thereof. The electroluminescent display device comprises a substrate, a cathode, an anode, a phosphor layer, electron emitters and isolation columns. The isolation columns form mutually isolated electron mobile channels for each electroluminescent field electron emitter to move from the cathode to the anode via the corresponding areas in a micro channel board or corresponding micro channels. The micro channel board effectively realize an electron multiplication effect. The isolation columns can realize an effect of controlling thickness, segmenting pixels and insulation. According to the invention, the device manufactured in the structure of the electroluminescent display device of the invention has a broad material selection scope. The manufacutring technology is simple. The resolution, the gray scale grade, the contrast, etc. of the device can be raised. The cost of the device can be lowered.

Description

technical field [0001] The invention belongs to the field of display, and in particular relates to an electroluminescence display device structure. Background technique [0002] Electron field emission refers to the emission of applying a strong electric field on the surface of an object to weaken the binding energy that prevents electrons from escaping the object, and using the tunneling effect to make it escape from the object. The magnitude of 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 shape of the field emission cathode includes a pointed cone type and a flat film type. The production process of the pointed cone field emission cathode is complex, difficult, and expensive, and it is not easy to make a large-area display device; the flat film type generally adopts a diamond film or a diamond-like type. However, diamond is a material with negative electron a...

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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