摘要:
A field emission display (FED) having a correction system with a correction coefficient derived from emission current is presented. Within one embodiment in accordance with the present invention, a field emission display has an anode at the faceplate and a focus structure. The anode potential is held at ground while the focus structure potential is held between, but is not limited to, 40 and 50 volts. The current flowing to the focus structure is measured and used as the basis for the correction coefficient for the field emission display.
摘要:
A document feeder feeds document sheets one by one from a stack on a tray by pressing one or more pick-up rollers against an uppermost document sheet and guiding one widthwise edge of the document sheet. The width direction is perpendicular to a document transport direction. The document feeder includes: a document size obtainer that obtains size information indicating a width of the document sheet; and a center-of-contact shifting mechanism that shifts a center of contact of each pick-up roller along an axial direction of the pick-up roller according to the obtained size information. The center of contact is a central point of an area where the pick-up roller is in contact with the document sheet. Each pick-up roller is in a barrel shape. The center-of-contact shifting mechanism shifts the center of contact of each pick-up roller by axially tilting the pick-up roller relative to the document surface.
摘要:
To prevent lowering of the brightness of a displayed image, realize satisfactory strength against high pressure and reliably form spacers, an image display apparatus incorporates an anode substrate having a structure in which at least an image display portion is formed on a first substrate; a cathode substrate in which at least an electron emission units are formed on a second substrate and which is disposed opposite to the anode substrate; and spacers each of which formed into a substantially rectangular shape and which are stood erect between the anode substrate and the cathode substrate, wherein the two long sides of the spacer are secured to at least either of the anode substrate or the cathode substrate, and tensions are added to the spacers in the lengthwise direction of the spacers.
摘要:
A main lens member for an electron gun comprises at least one high electrical resistance layer formed of a higher electrical resistance material sandwiched between low electrical layers which are laminated together to form a main line of an electron gun.
摘要:
A method of manufacturing an anode panel, the anode panel including a substrate, unit phosphor regions, lattice-shaped barrier ribs, anode electrode units, and a resistor layer for electrically connecting the anode electrode units to each other, the method including the steps of: obtaining the anode electrode units by forming the barrier ribs and the unit phosphor regions on the substrate, next forming a conductive material layer on an entire surface, and then removing parts of the conductive material layer which parts are situated on barrier rib top surfaces; and forming the resistor layer; wherein a step of removing the parts of the conductive material layer which parts are situated on the barrier rib top surfaces includes a step of attaching a peeling layer to the parts of the conductive material layer which parts are situated on the barrier rib top surfaces and then mechanically peeling off the peeling layer.
摘要:
A color picture tube is provided with a glass bulb in which the external surface of the effective display area of the face plate is formed substantially flat and a color selection mask, having the curvature projected toward the face plate, provided opposed to the internal surface of the face plate within the glass bulb. Therefore, the external surface is flat, the mechanical shock resistance characteristic is high, a tension can surely be applied to the color selection mask and moreover vibration of the color selection mask can be prevented even if external vibration is applied thereto.
摘要:
An induction heating fixing device transports a sheet sandwiched between a fixing belt and a pressing roller pressed thereagainst, heats the sheet, and thereby fixes a toner image onto the sheet. The fixing belt is composed of a conductive member, a core, and an induction coil which have been formed into thin films and stacked in layers so that the size and weight of the fixing device are reduced.
摘要:
A cathode ray tube includes a sixth grid (G.sub.6), which is a final accelerating electrode, of first to sixth grids (G.sub.1 to G.sub.6) forming an electron gun and the sixth grid (1) is divided into three electrodes (G.sub.6a, G.sub.6b and G.sub.6c). Longitudinally oblong opening portions (9 and 11) are formed through the first and third electrodes (G.sub.6a and G.sub.6c), and a laterally oblong opening portion (10) is formed through the second electrode (G.sub.6b). A dynamic voltage is supplied to the electrode (G.sub.6b) through a neck capacitor (19) formed at a neck portion (2a) of the cathode-ray tube (2) to thereby form a quadrupole-lens electric field (7) for correction of deformation of a beamspot on the side of a deflection yoke relative to a main-lens electric field (8).
摘要:
A dynamic convergence apparatus of a simplified arrangement can reduce a distortion of a beam spot on a periphery of a picture screen and improve a focusing, wherein a parallel circuit of a high resistance value resistor (R) and a diode (D) is connected between low voltage side electrode plates (3), (4) and high voltage side electrode plates (1), (2) to which an anode voltage (HV) is applied, a capacitor (C) is formed by coating a conductive layer on the inside and outside of a tube envelope of a color CRT while glass of the tube envelope is used as a dielectric material, and a convergence voltage which results from adding a vertical parabolic wave voltage to the horizontal blanking period of a modulated voltage provided by amplitude-modulating a DC voltage very slightly lower than the anode voltage (HV) by horizontal and vertical parabolic waves is commonly supplied from one end side (outside of the tube envelope) of the capacitor (C) to the low voltage side electrode plates (3), (4).
摘要:
An image reading apparatus for reading an image of a document in a selected one of a first mode and a second mode includes: a light source adapted to illuminate a surface of the document; a CCD sensor adapted to receive light reflected from the document surface; and a light intensity controller adapted to control the light source to emit light at a different intensity between the first and second modes.