摘要:
A flat panel display includes a faceplate and an opposing backplate. The two are sealed together and a sealed envelope is created that includes an active area of length L.sub.1. The active layer includes addressable pixels on the faceplate. Spacers are perpendicular to the faceplate and backplate. The length of a spacer is in a direction parallel to the plane of the faceplate. At least one spacer is positioned in the envelope and provides rigidity to the display. This is required because of the high vacuum which is maintained within the envelope. One or more electrodes are formed on an exterior surface of the spacer. The electrodes extend a length of L.sub.2 along a side of the spacer that is at least equal to L.sub.1. Voltages applied to the electrodes are controlled to achieve a desired voltage distribution between the backplate and the faceplate. The electrode is made of a material with a sheet resistance of less than about 10.sup.5 to 10.sup.7 .OMEGA./.quadrature.. The potential drop across the spacer between the faceplate and the backplate can be tailored by the selection of the position of the electrodes on the spacers, as well as the potentials applied to the electrodes. An additional way of tailoring the potential drop is selecting a desired thickness or conductivity of the spacer from top to bottom.
摘要:
The intensity at which electrons emitted by a first plate structure (10) in a flat-panel display strike a second plate structure (12) for causing it to emit light is controlled so as to reduce image degradation that could otherwise arise from undesired electron-trajectory changes caused by effects such as the presence of a spacer system (14) between the plate structures. An electron-emissive region (20) in the first plate structure typically contains multiple laterally separated electron-emissive portions (201 and 202) for selectively emitting electrons. An electron-focusing system in the first plate structure has corresponding focus openings (42P1 and 42P2) through which electrons emitted by the electron-emissive portions respectively pass. Upon being struck by the so-emitted electrons, a light-emissive region (22) in the second plate structure emits light to produce at least part of a dot of the display's image.
摘要:
A spacer (100 or 600/1000A/1000B) situated between a faceplate structure (301) and a backplate structure (302) of a flat panel display is configured to be self standing. In one implementation, a pair of spacer feet (111 or 113 and 112 or 114) are located over the same face surface, or over opposite face surfaces, of a spacer wall (101) near opposite ends of the wall. An edge electrode (121 or 122) is located over an edge surface of the spacer adjacent to the faceplate structure or the backplate structure. In another implementation, a spacer clip (1000A or 1000B) clamps opposite face surfaces of a spacer wall (600) largely at one end of the wall.
摘要:
A flat panel display contains a faceplate structure (174 or 350), a backplate structure (175 or 351), and a spacer (140, 340, 0r 341). A light-emitting structure (171 or 306) is located along a faceplate (170 or 302) in the faceplate structure. An electron-emitting structure (172 or 305) is located along a backplate (173 or 303) in the backplate structure. The spacer is situated between the light-emitting and electron-emitting structures. Transition metal oxide or transition metal in oxide state is present in a ceramic core (401, 501, 0r 601) or/and a resistive skin (402, 403, 502, 503, 602, or 603) of the spacer.
摘要:
A method of removing contaminant particles in newly fabricated field emission displays. According to one embodiment of the present invention, contaminant particles are removed by a conditioning process which includes the steps of: a) driving a anode of a field emission display (FED) to a predetermined voltage; b) slowly increasing an emission current of the FED after the anode has reached the predetermined voltage; and c) providing an ion-trapping device for catching the ions and particles knocked off, or otherwise released, by emitted electrons. In this embodiment, by driving the anode to the predetermined voltage and by slowly increasing the emission current of the FED, contaminant particles are effectively removed without damaging the FED. The present invention also provides a method of operating FEDs to prevent gate-to-emitter current during turn-on and turn-off. In this embodiment, the method comprises the steps of: a) enabling the anode display screen; and, b) enabling the electron-emitters after the anode display screen is enabled. In this embodiment, by allowing sufficient time for the anode display screen to reach a predetermined voltage before the emitter is enabled, the emitted electrons will be attracted to the anode.
摘要:
According to the invention, a flat panel device includes a spacer for providing internal support. In one embodiment, the spacer is made of ceramic, glass-ceramic, ceramic reinforced glass, devitrified glass, metal with electrically insulative coating or high-temperature vacuum-compatible polyimide, and can be a spacer wall, a spacer structure including a plurality of holes, or some combination of a spacer wall, spacer walls, and spacer structure. Spacer surfaces are treated to reduce secondary emissions and prevent charging of the spacer surfaces. The flat panel device can include a thermionic cathode or a field emitter cathode, and the faceplate and backplate can both be straight or both be curved. The flat panel device can include an addressing grid. In a method according to the invention for assembling a flat panel device, spacer walls are held in proper alignment during assembly by being inserted into a notch formed in the addressing grid and/or a top or bottom wall of the enclosure. Spacers according to the invention can be easily fabricated using standard techniques for forming and assembling ceramic or glass-ceramic tape.
摘要:
A flat panel apparatus includes a faceplate with a backplate interior side, a backplate with a backplate interior side, and sidewalls positioned between the faceplate and backplate, all in combination forming an enclosed sealed envelope. At least one spacer is positioned in the envelope. The spacer includes a spacer backplate face, with a periphery, and it is positioned adjacent to the backplate interior side. The spacer also includes a spacer faceplate face, with a periphery, and it is positioned adjacent to the faceplate interior side. A first conductive layer, metallization, is applied to substantially cover the entire spacer backplate face to its periphery. A second conductive layer, metallization, is applied to substantially cover the entire spacer faceplate face to its periphery. A plurality of spacers can be positioned in the sealed envelope, and the spacers can be in the form of walls, posts, or wall segments. In place of the conductive layers at the faces, each spacer can include a plurality of electrodes that extend along spacer sidewalls. In this embodiment, the spacer has a sidewall electrode that is positioned sufficiently close to each face surface as to create good ohmic contact between the face surface and the respective faceplate or backplate interior side.
摘要:
Methods and structures are provided which support spacer walls in a position which facilitates installation of the spacer walls between a faceplate structure and a backplate structure of a flat panel display. In one embodiment, spacer feet are formed at opposing ends of the spacer wall. These spacer feet can be formed of materials such as ceramic, glass and/or glass frit. The spacer feet support the corresponding spacer wall on the faceplate (or backplate) structure. Tacking electrodes can be provided on the faceplate (or backplate) structure to assert an electrostatic force on the spacer feet, thereby holding the spacer feet in place during installation of the spacer wall. The spacer wall can be mechanically and/or thermally expanded prior to attaching both ends of the spacer wall to the faceplate (or backplate) structure. The spacer wall is then allowed to contract, thereby introducing tension into the spacer wall which tends to straighten any inherent waviness in the spacer wall. Alternatively, spacer clips can be clamped onto opposing ends of a spacer wall to support the spacer wall during installation. The spacer clips can provide electrical connections to face electrodes located on the spacer wall.
摘要:
A method of removing contaminant particles in newly fabricated field emission displays. According to one embodiment of the present invention, contaminant particles are removed by a conditioning process which includes the steps of: a) driving a anode of a field emission display (FED) to a predetermined voltage; b) slowly increasing an emission current of the FED after the anode has reached the predetermined voltage; and c) providing an ion-trapping device for catching the ions and particles knocked off, or otherwise released, by emitted electrons. In this embodiment, by driving the anode to the predetermined voltage and by slowly increasing the emission current of the FED, contaminant particles are effectively removed without damaging the FED. The present invention also provides a method of operating FEDs to prevent gate-to-emitter current during turn-on and turn-off. In this embodiment, the method comprises the steps of: a) enabling the anode display screen; and, b) enabling the electron-emitters after the anode display screen is enabled. In this embodiment, by allowing sufficient time for the anode display screen to reach a predetermined voltage before the emitter is enabled, the emitted electrons will be attracted to the anode.
摘要:
Spacers (140 or 404) suitable for a flat panel display are fabricated according to a process in which a laminated wafer (100 or 400) is formed by laminating a core wafer (401) of electrically insulating ceramic to an additional wafer (402 or 403) created at least from electrically insulating ceramic, transition metal, and oxygen, at least part of the oxygen being bonded to the transition metal and/or constituents of the ceramic. The laminated wafer is then cut to form the spacers. Face metallization strips (101-110 or 405 and 406) may be provided over outside face surfaces of the laminated wafer.