An application specific field emission display includes one or more extended emitters. The emitters are patterned according to a selected image where the selected image depends upon the application. In one embodiment, an emitter is patterned in a serpentine pattern to provide a single block of illumination. In another application, emitters are grouped in threes and the emitters are driven respectively by the red, green, and blue components of an image signal to produce a multicolor display. In a display assembly according to the invention, application specific emitters are incorporated in subdisplays on a common substrate with a conventional matrix addressable array. The array provides video, graphical or textual information and the subdisplays provide textual, fixed-shaped graphical, numerical or colorized information.
Devices for electric field control in a field emission display are provided. In one implementation, a device includes a cathode substrate, a plurality of emitter lines formed on the cathode substrate, and a plurality of gate wires crossing over the plurality of emitter lines. Each gate wire has a cross section shaped to produce an electric field between adjacent gate wires that is substantially uniform and substantially flat across a portion of an emitter line in between the adjacent gate wires, the electric field causing an electron emission from the portion of the emitter line. Generally, the electric field is produced by applying a voltage potential difference between at least one gate wire and the emitter line, the electric field sufficient to cause the electron emission.
An electron emitting structure, for example, for use as a cathode plate of a field emission display (FED). The structure comprises a substrate, base electrodes formed on the substrate and gate electrodes crossing over the base electrodes. An insulating material is formed on the substrate and the base electrodes that separates the gate electrodes from the base electrodes, the gate electrodes formed on the insulating material. And an electron emitting material is deposited on active regions of the base electrodes, each active region defined as a portion of each base electrode between a respective pair of gate electrodes. In one implementation, the FED produces a substantially uniform electric field in the active region in order to produce a substantially straight electron emission little dispersion.
Structures for field emission displays and methods of making and using such structures are provided. In one implementation, a cathode plate of a field emission display includes a cathode substrate of the field emission display and a plurality of emitter lines formed on the cathode substrate. In another implementation, an anode plate of a field emission display includes a transparent piece of the field emission display and a plurality of phosphor lines formed on the transparent piece. The plurality of phosphor lines are to be aligned with and receive electrons from a plurality of emitter lines of a cathode substrate of the field emission display.
Structures for field emission displays and methods of making and using such structures are provided. In one implementation, a cathode plate of a field emission display includes a cathode substrate of the field emission display and a plurality of emitter lines formed on the cathode substrate. In another implementation, an anode plate of a field emission display includes a transparent piece of the field emission display and a plurality of phosphor lines formed on the transparent piece. The plurality of phosphor lines are to be aligned with and receive electrons from a plurality of emitter lines of a cathode substrate of the field emission display.
A cathode plate of field emission display comprising a cathode substrate of the field emission display having a thickness and one or more in-laid linear isolation barriers formed within the thickness of a top surface of the cathode substrate. The one or more in-laid linear isolation barriers are adapted to contain electron emitter lines, wherein the one or more in-laid linear isolation barriers provide field isolation between respective ones of the electron emitter lines. In one embodiment, the in-laid isolation barriers comprise trenches. In some embodiments, portions of the top surface in between in-laid isolation barriers are adapted to contact gate wires of a gate frame positioned over the cathode substrate in order to dampen driving frequency vibrations in the gate wires.