公开(公告)号：EP0968510A4

公开(公告)日：2005-01-05

申请号：EP97933337

申请日：1997-07-17

Applicant: CANDESCENT INTELLECTUAL PROP

Inventor： SPINDT CHRISTOPHER J ,  MORRIS DAVID L ,  SCHMID ANTHONY P ,  SUN YU NAN

IPC: H01J29/87 ,  G09G3/20 ,  G09G3/22 ,  H01J29/02 ,  H01J29/92 ,  H01J29/96 ,  H01J31/12 ,  H01J1/62 ,  H01J63/04

CPC classification number: H01J31/123 ,  H01J29/028 ,  H01J2329/8625 ,  H01J2329/864 ,  H01J2329/8645 ,  H01J2329/8655

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.

公开(公告)号：EP0944912A4

公开(公告)日：2003-07-16

申请号：EP97950630

申请日：1997-11-26

Applicant: CANDESCENT INTELLECTUAL PROP

Inventor： FAHLEN THEODORE S ,  LUDWIG PAUL N ,  SCHMID ANTHONY P ,  PRESSLEY ROBERT J ,  CHO STEVEN T ,  CONTE ALFRED S ,  COOPER ANTHONY J ,  POTHOVEN FLOYD R

IPC: G09F9/00 ,  G09F9/30 ,  H01J9/24 ,  H01J9/26 ,  H01J31/12

CPC classification number: H01J31/123 ,  B23K26/206 ,  C03B23/24 ,  H01J9/261 ,  H01J9/385

Abstract: Portions (40 and 44) of a structure, such as a flat-panel display, are positioned such that a sealing area (40S) of one portion is at least partially separated from a corresponding sealing area (44S) of another portion such that a gap (48) at least partially separates the two sealing areas, typically by height of 25 microns or more. Energy is applied in a "gap jumping technique" to locally heat material of at least one portion along the sealing area such that the material bridges the gap and seals the portions (40 and 44) together. A laser is typically employed to locally melt and draw the material into the gap by a combination of factors such as surface tension and capillary action. A first part of the gap jumping technique may be performed in a non-vacuum environment to tack the portions together, but the gap jumping technique is typically completed in a vacuum to form an evacuated panel.