Abstract:
A flat panel display includes a spacer with a coating material applied over the spacer. The coating material is characterized by formula Psc > 100(Psw) and r
Abstract:
An electron-emitting device contains an electron focusing system (37 or 37A) formed with a base focusing structure (38 or 38A) and a focus coating (39 or 39A) that penetrates, preferably only pathway, into a focus opening (40) extending through the base focusing structure. The focus coating, normally of lower resistivity than the base focusing structure, is typically formed by an angled deposition technique. An access conductor (106 or 106A) is preferably electrically coupled to the lower surface of the focus coating. A potential for controlling the focusing of electrons that travel through the focus opening is provided to the focus coating via the access conductor.
Abstract:
Methods and structures are provided which reduce charge build up on spacer walls in a flat panel display. In one embodiment, the order of activating the electron emitting elements is modified such that the electron emitting elements adjacent to the spacers are activated before the electron emitting elements which charge thespacers (501, 502, 503) to an undesirable level. In another embodiment, face electrodes (501a, 502a, 503a) which are located on the surface of the spacer are connected to a common bus (504), thereby distributing the charge built up on any particular spacer. The common bus (504) can further be connected to a capacitor (1010) which is located either inside or outside the active region of the flat panel display, thereby increasing the charging time constant of the spacers. The capacitor can be connected to ground or to a high voltage supply (1011). In another embodiment, the charging time constant of the spacers is increased by fabricating the spacers from a material having a high dielectric constant, such as dispersion of aluminum oxide, chromium oxide and titanium oxide, wherein the titanium oxide makes up approximately four percent of the spacer material.
Abstract:
A multi-level conductive matrix structure for separating rows (106, 108) and columns (110-122) of sub-pixels on a faceplate (104) of a flat panel display device is disclosed. The matrix structure has a first plurality of parallel spaced apart conductive ridges having a height, a second plurality of parallel spaced apart conductive ridges having a height higher than the height of the first plurality of conductive ridges, and the height of second conductive ridges decreases to the height of first conductive ridges at intersections of the first and second conductive ridges.
Abstract:
A coating material, for coating a spacer structure (300) of a flat panel display, having specific resistivity and secondary emission characteristics is disclosed. The coating material is characterized by formula Psc > 100(Psw) and r
Abstract:
A flat-panel display is hermetically sealed by a process in which a first plate structure (30) is positioned generally opposite a second plate structure (32) such that sealing material (34) provided over the second plate structure lies between the plate structures. In a gravitational sealing technique, the first plate structure is positioned vertically below the second plate structure. The sealing material is heated so that it moves vertically downward under gravitational influence to meet the first plate structure and seal the plate structures together. In a global-heating gap-jumping technique, the plate structures and sealing material are globally heated to cause the sealing material to jump a gap between the sealing material and the first plate structure. When the first plate structure is positioned vertically above the second plate structure, the sealing material moves vertically upward to meet the first plate structure and close the gap.
Abstract:
A flat panel display having a backplate structure (330), a faceplate structure (320), and a spacer (340) situated between the two plate structures is configured so that the electric potential field along the spacer approximates the potential field that would be present at the same location in free space, i.e., in the absence of the spacer, between the two plate structures. Consequently, the presence of the spacer does not significantly affect the trajectories of electrons moving from the backplate structure to the faceplate structures. Alternatively, the spacer is arranged to produce electron deflection that largely compensates for undesired electron deflection which occurs during earlier electron travel from the backplate structure to the faceplate structure. The net electron deflection is small.
Abstract:
An electron-emitting device utilizes an emitter electrode (12) shaped like a ladder in which a line of emitter openings (18) extend through the electrode. In fabricating the device, the emitter openings can be utilized to self-align certain edges, such as edges (38C) of a focusing system (37), to other edges, such as edges (28C) of control electrodes (28), to obtain desired lateral spacings. The self-alignment is typically achieved with the assistance of a backside photolithographic exposure operation. The ladder shape of the emitter electrode also facilitates the removal of short-circuit defects involving the electrode.
Abstract:
A liquid chemical formulation suitable for making a thin solid polycarbonate film contains polycarbonate material and a liquid typically capable of dissolving the polycarbonate to a concentration of at least 1 %. The liquid also typically has a boiling point of at least 80 °C. Examples of the liquid include pyridine, a ring-substituted pyridine derivative, pyrrole, a ring-substituted pyrrole derivative, pyrrolidine, a pyrrolidine derivative, chlorobenzene, and cyclohexanone. A liquid film (36A) of the liquid chemical formulation is formed over a substructure (30) and processed to remove the liquid. In subsequent steps, the resultant solid polycarbonate film can serve as a track layer through which charged particles (70) are passed to form charged-particle tracks (72). Apertures (74) are created through the track layer by a process that entails etching along the tracks. The aperture-containing polycarbonate track layer is typically employed in fabricating a gated electron-emitting device.
Abstract:
A getter (50 or 74) situated in a cavity of a hollow structure, such as a flat-panel device, is activated by directing light energy locally through part of the hollow structure and onto the getter. The light energy is typically provided by a laser beam (60). The getter, typically of the non-evaporable type, is usually inserted as a single piece of gettering material into the cavity. The getter normally can be activated/re-activated multiple times in this manner, typically during the sealing of different parts of the structure together. The getter-containing cavity can be formed by a pair of plate structures (40 and 42) sandwiched around and outer wall (44), or by an auxiliary compartment (72) connected to a larger main compartment (70) typically constituted by the plate structures and outer wall.