Field transmission plane light source and preparation method thereof

Abstract

The invention provides a field transmission plane light source, comprising an anode, a grid, a cathode and an isolator which all form a vacuum-tight cavity, wherein the anode sequentially comprises an anode substrate, an anode conductive layer and a lighting layer; the isolator includes an isolator body and a side wall support, the isolator body is provided with a funnel-shaped through hole, and the large opening end of the isolator body is connected to the lighting layer; the grid is provided with a grid through hole through which electrons emitted by the cathode can pass, and the grid is sandwiched between the small opening end of the isolator and the cathode through the side wall support; the cathode sequentially comprises a cathode emitter, a cathode conductive layer and a cathode substrate, the surface of the cathode substrate is provided with arc-shaped grooves, the cathode conductive layer is arranged on the upper surface of the cathode substrate, and the cathode emitter is arranged on the upper surface of the cathode conductive layer in the arc-shaped groove. The invention also provides a preparation method of the field transmission plane light source.

Description

Technical field [0001] The invention relates to the technical field of optoelectronics, in particular to a field emission planar light source and a preparation method thereof. Background technique [0002] The principle of the field emission plane light source is: introducing a voltage into the vacuum belt between the cathode and the anode to generate an electric field, so that the electric field stimulates the cathode emitter to emit electrons and hits the phosphor coated on the anode under the acceleration of the positive voltage on the anode. , And produce luminous effect. [0003] The field emission plane light source has the advantages of energy saving, environmental protection, ability to work in harsh environments (such as high temperature environment and low temperature environment), lightness and thinness, and can be widely used in various lighting fields. Compared with the traditional backlight module, the field emission plane light source is not only simple in structure...

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Problems solved by technology

[0004] In the actual working process, the anode will produce a certain amount of residual gas under the bombardment of the electron beam emitted from the cathode. The ionization energy of some of these gases is less than the energy of the electron beam emitted from the cathode, so ionization will occur. The ionized positive ions will bombard the cathode surface perpendicular to the cathode surface under the action of a strong electric field, resulting in damage to the cathode electron emission material, resulting in a decline in emission capability, which seriously affects the stability and life of the field emission planar light source.

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