Abstract:
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.
Abstract:
A method for reducing charge accumulation in a field emission display (100) includes the steps of causing a plurality of electron emitters (114) to emit electrons (132) to reduce the potential at an anode (124) of the field emission display (100). Upon the reduction of the potential at the anode (124), the electrons (132) neutralize a positively electrostatically charged surface (129) of a spacer (130). The anode potential is dropped by providing a resistor (127) in series with a voltage source (126) connected to the anode (124). The anode potential is reduced by causing the electron emitters (114) to emit simultaneously to provide a pull-down current (128) at the anode (124). The voltage at the anode (124) is reduced to a value that causes a sufficient flux of electrons (132) to be attracted to the charged surfaces (129) for neutralizing them.
Abstract:
A field emission display (100) includes a cathode plate (102) having a plurality of electron emitters (124), an anode plate (104) opposing the cathode plate (102), and a bulk-resistive spacer (108) extending between the anode plate (104) and the cathode plate (102). The bulk-resistive spacer (108) is made from an electrically conductive material. The resistivity of the electrically conductive material is selected to remove impinging charges while preventing excessive power loss due to electrical current through the bulk-resistive spacer (108) from the anode plate (104) to the cathode plate (102).
Abstract:
A multi-level conductive matrix structure for separating rows and columns of sub-pixels on the faceplate of a flat panel display device. In one embodiment, the present invention is formed partially of a first plurality of conductive ridges which are disposed on the faceplate between respective adjacent rows of sub-pixel regions. The present invention is further formed of a second plurality of conductive ridges which are orthogonally oriented with respect to and integral with the first plurality of conductive ridges such that a matrix structure is formed. In the conductive matrix of the present invention, the second plurality of conductive ridges have a height which is greater than the height of the first plurality of conductive ridges such that a multi-level conductive matrix is formed. However, the height of the second plurality of conductive ridges decreases to approximately the height of the first plurality of conductive ridges at respective intersections of the first and second plurality of conductive ridges. In so doing, the present invention provides a multi-level conductive matrix for separating rows and columns of sub-pixels on the faceplate of a flat panel display device.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of scanning an electron beam for forming an electric field to properly guide electrons discharged from a pattern to the outside of the pattern, and an electron scanning microscope.SOLUTION: When a sample is irradiated with the electron beam for forming electrification, after irradiating a first electron beam at a first position and a second position using a center of the pattern formed on the sample as a symmetrical point, the first electron beam is further irradiated at two center positions between a first and a second irradiation positions, which are on the same radius as that of the first and the second positions having the symmetrical point as the center. After that, the irradiation of the first electron beam at the center position between the scanned positions on the radius is further repeated.
Abstract:
A field emission display (100) includes a cathode (102) having a plurality of electron emitters (124), an anode (104) opposing the cathode (102), and a composite spacer (108) extending between the anode (104) and the cathode (102). The composite spacer (108) includes a first layer (107), which is made from a dielectric or bulk resistive material, and a conductive layer (109), which is attached to the first layer (107) and is made from a metal, metal alloy, or a ceramic-metal composite material. The height of the composite spacer (108) is greater than 500 micrometers.