Abstract:
In an electron emission device and its method of fabrication, a plurality of holes (211) are smoothly formed within a limited region, and an ohmic layer (207) connected to a signal line (204) is formed using some of the plurality of holes. The electron emission device includes: a substrate (201); a first electrode (203) arranged on the substrate; a first insulating layer (205) arranged on the first electrode and having a plurality of first holes (211); an ohmic layer (207) arranged in at least one of the plurality of first holes and electrically connected to the first electrode; a signal line (204) electrically connected to the ohmic layer and adapted to supply a voltage to the first electrode via the ohmic layer; an emitter arranged (215) in the plurality of first holes excluding the at least one hole having the ohmic layer arranged therein and electrically connected to the first electrode; and a second electrode (213) arranged on the first insulating layer and having a plurality of gate holes corresponding to the plurality of first holes excluding the at least one hole having the ohmic layer arranged therein.
Abstract:
A method for fabricating a field emission display (200) includes the steps of affixing a first tab (122) of an alignment member (120) to a protruding portion (118) of an anode plate (113), affixing a second tab (122) of the alignment member (120) to a protruding portion (121) of a cathode plate (112), aligning the anode plate (113) with the cathode plate (112), affixing the anode plate (113) to the cathode plate (112), and, thereafter, removing the alignment member (120) by removing both the protruding portion (118) of the anode plate (113) and the protruding portion (121) of the cathode plate (112). The tabs (122) are connected to a spacer (124). The thermal expansion coefficients of the cathode plate (112), the anode plate (113), and the alignment member (120) are substantially equal to one another.
Abstract:
A matrix addressed diode flat panel display (820) including a diode pixel structure. The flat panel display includes a cathode assembly having a plurality of cathodes (210-280), each cathode including a plurality of cathode conductive material (440) and a layer of low effective work-function material (460) deposited over the cathode conductive material and an anode assembly having a plurality of anodes (290-292), each anode including a layer of anode conductive material (410) and a cathodoluminescent material (430) deposited over the anode conductive material, the anode assembly located proximate the cathode assembly to thereby receive the charged particle emissions from the cathode assembly. The display further includes means (100) for selectively varying field emissions between the plurality of corresponding light-emitting anodes and field-emission cathodes.
Abstract:
Flat display screen of the type comprising a cathode (1) provided with microtips (2) for electron bombardment associated with a grid (3), an anode (5) carrying phosphorescent elements (7) and a space (12) separating the electrodes. The screen comprises an insulating plate (13) defining said space (12) associated with means spacing apart the plate (13) from the anode (5), the plate (13) comprising holes (14) corresponding to the areas (17) provided with microtips (2).
Abstract:
According to two aspects of the invention, a FED and a process for making a FED are provided which effectuate more accurate and efficient sealing between a faceplate and a backplate assembly, with more accurate and efficient sealing between the faceplate (10) and cathode member (12). The FED is made according to a process comprising: aligning the faceplate and the cathode member; disposing an adhesive (16) between the faceplate and the cathode member; pressing the faceplate and the cathode member together; disposing a frit seal (18) between the faceplate and the backplate assembly; and heating the frit seal to a temperature sufficient to cause the frit to seal.
Abstract:
A method for fabricating a field emission display (200) includes the steps of affixing a first tab (122) of an alignment member (120) to a protruding portion (118) of an anode plate (113), affixing a second tab (122) of the alignment member (120) to a protruding portion (121) of a cathode plate (112), aligning the anode plate (113) with the cathode plate (112), affixing the anode plate (113) to the cathode plate (112), and, thereafter, removing the alignment member (120) by removing both the protruding portion (118) of the anode plate (113) and the protruding portion (121) of the cathode plate (112). The tabs (122) are connected to a spacer (124). The thermal expansion coefficients of the cathode plate (112), the anode plate (113), and the alignment member (120) are substantially equal to one another.
Abstract:
An electroluminescent (EL) display is formed on a ceramic substrate having a front ceramic surface and a back ceramic surface. The ceramic substrate includes a metal core that provides structural support, electrical ground, and heat dissipation. EL cells (20) are mounted on the front ceramic surface (31) and driver circuits (10) for driving the EL cells (20) are mounted on the back ceramic surface (31). The driver circuits (10) are positioned directly behing said EL cells. Connectors (27) extend through said ceramic substrate and the EL cells to different driver circuits. By positioning the driver circuits close to the EL cells, the drive lines from the drivers to the EL cells are short which allows for high refresh rates and low resistance losses. Each of the driver circuits can drive one EL cell or a group of EL cells. EL display cells coupled to a cermet electrode can also be driven by a field emission device (110) or a low power electron beam (140).
Abstract:
A field emitter structure, comprising: a base substrate; a field emitter element on the base substrate; a multilayer differentially etched dielectric stack circumscribingly surrounding the field emitter element on the base substrate; and a gate electrode overlying the multilayer differentially etched dielectric stack, and in circumscribing spaced relationship to the field emitter element. Also disclosed are electron source devices, comprising an electron emitter element including a material selected from the group consisting of leaky dielectric materials, and leaky insulator materials, as well as electron source devices, comprising an electron emitter element including an insulator material doped with a tunneling electron emission enhancingly effective amount of a dopant species, and thin film triode devices.
Abstract:
Display panels comprise at least one suspended fibrous cathode containing an electron field emitter. The fibrous cathode is supported by a substrate (10) containing two sets of parallel rows of crests and valleys. The first set of parallel crests (11) and valleys (12) provide the valleys along which the fibrous cathode is aligned. The second set of parallel crests (13) and valleys (14) is perpendicular to the first set. The valleys (14) provide the means for suspending the fibrous cathode.
Abstract:
An improved field emission cathode and methods for fabricating such a cathode are disclosed. In the methods of the invention, the field emission cathode is made from at least one body containing a first substance. The method steps include a preparation of irregularities in an emitting surface of the body, adding to the emitting surface of the body ions of a second substance with a low work function, and modifying the emitting surface by inducing field emission in applying a variable electric field to the body and increasing the field strength in steps.