CN1355548A - Microelectronic vacuum luminous element with efficient dual-surface field emission cathode - Google Patents

Abstract

A new high-efficiency double-sided field-emission cathode vacuum microelectronic light-emitting device includes two parallel fluorescent screens, and a cathode that emits electrons on both sides between the fluorescent screens. The invention can be used in devices such as light sources and flat panel displays, and has both the low cost of incandescent lamps and the high efficiency of fluorescent lamps when used in light sources. It has the advantages of low voltage, high efficiency, safety and reliability when used in flat panel displays. The luminous ability of the light source and the flat panel display is improved by about 2 times, the volume and weight of the light-emitting device are reduced, materials and energy are saved, and heat loss is eliminated.

Description

Microelectronic vacuum luminous element with efficient dual-surface field emission cathode

The invention belongs to the microelectronic vacuum field-transmitting cathode, particularly luminescent devices such as microelectronic vacuum field emission light source and flat-panel monitor.

The evacuated display tube that uses all uses single face cathode emission at present.Double-sided display will be used two evacuated display tubes if desired.So in the occasion that needs the two sides to show, it is very huge that display unit is done, the also corresponding complexity of structure.

The present invention seeks to propose a kind of new structure of microelectronic vacuum dual-surface field emission cathode.

Main feature of the present invention is to comprise two parallel phosphor screens as anode, and the negative electrode of one or two surface launching electronics is arranged between phosphor screen, is vacuum state in the described phosphor screen.The present invention has cathode construction in two, and a kind of is the negative electrode of double-sided deposition electron emission film, and another kind is two-sided silicon tip array cathode.

This new structure can be used for devices such as light source and flat-panel monitor, be used for light source and be it have concurrently the low cost of incandescent lamp and fluorescent lamp high efficiency, have low-voltage, safe and reliable advantage, can improve lighting angle, economical with materials, energy savings again; Be used for flat-panel monitor and have low-voltage, high efficiency, safe and reliable advantage, can improve luminous power, economical with materials, energy savings again.Improve about 2 times of the luminous power of light source and flat-panel monitor, reduced the volume and weight of luminescent device, eliminated thermal losses.

Fig. 1 is the luminescent device schematic diagram, and negative electrode is the silicon tip negative electrode.

1 is cathode leg among the figure, the 2nd, and cathodic field emission silicon tip array, the 3rd, phosphor screen, the 4th, getter, the 5th, cathode leg.

Fig. 2 is the luminescent device schematic diagram, and negative electrode is a film cathode.

21 is cathode legs among the figure, the 22nd, and cathodic field emission silicon tip array, the 23rd, phosphor screen, the 24th, getter, the 25th, cathode leg.

The operation principle of novel field emission light-emitting device is: anode phase target applies positive voltage, forms accelerating field at cathode surface, and the cathode emission electronics makes the luminous demonstration of low-voltage phosphor.Novel evacuated microelectronics dual-surface field emission cathode is used to from the electronics of FEA luminous by the phosphor screen of its front of preassigned pattern bombardment, because can deposit film or erode away the silicon tip array at the tow sides of same silicon chip, will produce field emission when generating positive and negative voltage is added on phosphor screen and the silicon chip under the situation in high vacuum, double than single face feds luminous power.

The primary structure of novel two-sided field-transmitting cathode has two kinds of structures, and a kind of is two-sided silicon tip array cathode, and two-sided emission silicon tip awl array thickness is silicon wafer thickness.Between negative electrode and the anode insulating barrier is arranged, thickness of insulating layer is generally 2-25 μ m.Low-voltage fluorescence as anode shields two, two parallel placements of phosphor screen, and negative electrode is placed between the phosphor screen, and distance is 2-30 μ m between negative electrode and the anode.

Another kind of is that double-side electronic is launched film cathode, its size and two-sided silicon tip array cathode size basically identical.The two-side film membrane cathode thickness can be by several dusts to tens micron according to material property; Low-voltage fluorescence as anode shields two, two parallel placements of phosphor screen, and distance is 2-30 μ m between negative electrode and the anode.

Claims (6)

1. A double-sided field emission cathode vacuum microelectronic luminescent device is characterized in that comprising two parallel phosphor screens as anodes, between the phosphor screens there is a negative electrode that emits electrons on both sides, and in the described phosphor screens, it is a vacuum state. 2. The light-emitting device according to claim 1, characterized in that said cathode is a cathode with electron emission thin films deposited on both sides. 3. The light emitting device according to claim 1, characterized in that said cathode is a double-sided silicon tip array. 4. The light-emitting device according to claim 1, wherein the anode is two low-voltage fluorescent screens. 5. The light-emitting device according to claim 1, characterized in that there is an insulating layer between the cathode and the anode, and the thickness of the insulating layer is 2-25 μm. 6. The light emitting device according to claim 1, characterized in that the distance between said anode and cathode is 2-30 μm.

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