Abstract: There is disclosed an FED (field emission display) capable of supplying an anode voltage, which is a high voltage, to an anode substrate with high reliability. A high voltage introduction button is sealed to a sealing plate, in which a contact spring is attached to the high voltage introduction button by spot welding. The high voltage introduction button has a flat portion connected to the contact spring, a sealing portion sealed to the glass substrate, and an external terminal to be connected to an external power source. The contact spring contacts an anode terminal of an anode substrate with an appropriate contact pressure, by a spring force from an arm portion of the contact spring. The anode terminal is formed of a conductive film containing metal particles.

Abstract: A spacer according to the present invention for use in a flat panel display, which includes a cathode substrate with a cold cathode electron emitting device formed thereon, an anode substrate with a phosphor formed thereon, and a spacer disposed between the cathode and anode substrates, comprises a base made of a conductive glass, and a conductive crystallized glass layer on a surface of the base. The spacer is more excellent in antistatic characteristics than conventional spacers having a conducting layer on the surface of an insulating glass base. A flat panel display according to the present invention using the spacers permits a higher voltage to be applied, thus increasing image quality.

Abstract: The discharge between the electron source and the anode is prevented, thus providing a highly reliable image display device. The data signal lines d and the scanning signal lines formed via an insulating layer INS are provided on the inside surface of the rear substrate SUB1, and further the electron sources ELS are formed at intersections between the data signal lines d and the scanning signal lines s. Discharge preventing members SSB are disposed on the scanning signal lines s. The discharge preventing members SSB have conductive layers ECL on an upper surface of an insulating core member MBD made preferably of glass, and is fixed in a lower surface thereof to the scanning signal lines s with an adhesive FGL such as frit glass. The width of the discharge preventing member SSB is arranged to be greater than the width of the scanning signal line s, and the dimensions are arranged so that the discharge preventing member SSB covers the scanning signal line s when viewed from the anode.

Abstract: A spacer of the present invention for use in an image display device, which has the spacer between a cathode substrate with a cold cathode electron emitting device formed thereon and an anode substrate with a phosphor formed thereon, comprises a phosphate glass having transition metal oxides as its main components, and a higher phosphate concentration layer at the spacer surface. A thickness of the higher phosphate concentration layer is suppressed to 0.5 ?m or less. More preferably, the spacer has a water resistant conductive passivation layer formed on its surface. This suppresses the thickness of the higher phosphate concentration layer to a thinner level, so that the spacer is less likely to be charged thus reducing the deflection amount of electron beam. An image display device of the present invention using above spacer can apply a higher voltage to the anode substrate, thus increasing the image quality.

Abstract: In a light emitting display device using electron emitter elements, it is possible to prevent lowering of image quality caused by spread of electron beams. MIM (Metal Insulator Metal) is used as the electron emitter elements and each of the electron emitter elements is surrounded by a conductive barrier (scanning wire). The electron emitter elements and the barriers are covered by upper electrodes so that the barriers and the surfaces of the electron emitter elements have the same electrical potential. The electron emitter elements and the barriers are formed on a cathode substrate. Color phosphors of R (red), G (green), and B (blue) are formed on an anode substrate at the side opposing to the cathode substrate. The color phosphors are excited by electron beams emitted from the electron emitter elements.

Abstract: In an electron gun including a cathode, a control electrode, an acceleration electrode G2, a focusing electrode G3 and an anode, longitudinally elongated concave SL-V which surround an electron beam aperture G2-H and have a long axis in the vertical direction is formed at a focusing electrode G3 side of the acceleration electrode G2, and an electron beam aperture G3-BH formed at the acceleration electrode G2 side of the focusing electrode G3 is formed in a longitudinally elongated shape having a long axis in the vertical direction. Due to such a constitution of the present invention, non-uniformity of the beam spot shape attributed to a deflection quantity can be reduced whereby the optimum focusing can be realized over the whole area of a screen.

Abstract: The present invention aims at maintaining the high focusing performance with a low deflection power in a projection tube which is used as a projection type TV receiver or a projector and is operated at a high voltage and with a single-electron-beam high current. A neck outer diameter of a portion on which a deflection yoke is mounted is made smaller than a neck outer diameter of a portion which accommodates an electron gun. A final electrode of the electron gun has a diameter thereof gradually decreased toward a phosphor screen. The maximum anode voltage of the projection tube is set to equal to or more than 25 KV and the maximum beam current is set to equal to or more than 4 mA.

Abstract: A cathode ray tube has an anode and a focus electrode. The large-diameter cylinder portion of the focus electrode is disposed concentrically within a large-diameter cylinder portion of the anode. The anode and a first electrode facing a cathode side end of the focus electrode are electrically connected together within the cathode ray tube. The following relationship is satisfied: −LP+184.9≧LG4≧0.0004 LP3−0.1571 LP2+21.006 LP−922.41, where LG4 (mm) is an axial length of the focus electrode, and LP (mm) is a distance from a phosphor screen side end of the focus electrode to a center of a phosphor screen.

Abstract: In an electron gun including a cathode, a control electrode, an acceleration electrode G2, a focusing electrode G3 and an anode, longitudinally elongated concave SL-V which surround an electron beam aperture G2-H and have a long axis in the vertical direction is formed at a focusing electrode G3 side of the acceleration electrode G2, and an electron beam aperture G3-BH formed at the acceleration electrode G2 side of the focusing electrode G3 is formed in a longitudinally elongated shape having a long axis in the vertical direction. Due to such a constitution of the present invention, non-uniformity of the beam spot shape attributed to a deflection quantity can be reduced whereby the optimum focusing can be realized over the whole area of a screen.

Abstract: A color cathode ray tube having an electron gun including an electron beam generating portion arrayed in a horizontal direction for generating three electron beams, and a main lens for focusing the three electron beams from the electron beam generating portion upon a fluorescent face. A final stage of the main lens is formed between a focusing electrode and an accelerating electrode. The focusing electrode is divided into at least two focusing electrode parts. A quadrupole electron lens is formed for each of the electron beams between a first focusing electrode part and a second focusing electrode part, and the strength of the quadrupole electron lens for the central electron beam is different from the strength of the quadrupole electron lens for the side electron beams.

Abstract: Out of focusing electrodes which face each other in an opposed manner and constitute an electrostatic quadruple lens, one focusing electrode includes planar correction electrode plates which extend parallel to a tube axis while sandwiching electron beams from above and below. Here, the correction electrode plates include a reinforcing mechanism for suppressing the deformation or the displacement of the planar correction electrode plates. By suppressing the deformation and the displacement of the planar correction electrode plates which form the electrostatic quadruple lens, it is possible to provide a color cathode ray tube capable of exhibiting excellent focusing characteristics over an entire screen.

Abstract: A cathode ray tube is provided having an electron gun equipped with a main lens having a function of controlling a shape of an electron beam spot which is deflected to the peripheral portion of a display screen, to improve a resolution at the peripheral portion of the screen of the cathode ray tube for use in a direct view color television receiver or a color display terminal. To reduce the dynamic correction voltage of the electron gun, an electrostatic quadrupole lens with a simple structure is used, thereby reducing deterioration due to the deflection aberration of the electron beam spot at the peripheral portion of the screen.

Abstract: Each of an anode and one of the sub-electrodes of a main lens of a shadow mask color cathode ray tube includes a first member having a single opening in their facing ends, and a second member having three beam apertures, wherein (A+566)/106>H−2×S is satisfied, where A is V1×V2×T, V1 is a vertical diameter of the opening, V2 is a vertical diameter of the center beam aperture, T is a distance between the opening and the second electrode member, H is a horizontal diameter of the opening, S is P×L/Q, where P is a horizontal center-to-center spacing between adjacent phosphor elements, Q is a spacing between the phosphor screen and the shadow mask, and L is a distance between the shadow mask and the opening in the first member.

Abstract: A lens structure of a pre-focus part of an Hi-UPF electron gun to be used for a cathode ray tube has a cathode, a control electrode, an acceleration electrode, a first anode, a focus electrode and a second anode arranged in this order. The first anode and the second anode are to be commonly supplied with an anode voltage, and the focus electrode is to be supplied with a focus electrode. In a cathode ray tube of this construction, in the pre-focus part, the control electrode has an electrode beam passage hole of 0.57 mm or smaller and the distance in the vicinity of the electron beam passage hole between the acceleration electrode and the first anode is 1.9 mm or smaller.

Abstract: A cathode ray tube has an anode and a focus electrode. The large-diameter cylinder portion of the focus electrode is disposed concentrically within a large-diameter cylinder portion of the anode. The anode and a first electrode facing a cathode side end of the focus electrode are electrically connected together within the cathode ray tube. The following relationship is satisfied: −LP+184.9≧LG4≧0.0004 LP3−0.1571 LP2+21.006 LP−922.41, where LG4 (mm) is an axial length of the focus electrode, and LP (mm) is a distance from a phosphor screen side end of the focus electrode to a center of a phosphor screen.

Abstract: The present invention aims at maintaining the high focusing performance with a low deflection power in a projection tube which is used as a projection type TV receiver or a projector and is operated at a high voltage and with a single-electron-beam high current. A neck outer diameter of a portion on which a deflection yoke is mounted is made smaller than a neck outer diameter of a portion which accommodates an electron gun. A final electrode of the electron gun has a diameter thereof gradually decreased toward a phosphor screen. The maximum anode voltage of the projection tube is set to equal to or more than 25 KV and the maximum beam current is set to equal to or more than 4 mA.

Abstract: A cathode ray tube has an anode of a large-diameter cylinder portion on its phosphor screen side and a small-diameter cylinder portion on its cathode side connected together, and a focus electrode formed of a large-diameter cylinder portion of a diameter larger than that of the small-diameter cylinder portion of the anode and a small-diameter cylinder portion having a diameter smaller than that of the small-diameter cylinder portion of the anode, the large-diameter and small-diameter cylinder portions being connected together. The large-diameter cylinder portion of the focus electrode is disposed concentrically within the large-diameter cylinder portion of the anode. The anode and a first electrode facing a cathode side end of the focus electrode are electrically connected together within the cathode ray tube. The following relationship is satisfied: −LP+184.9≧LG4≧0.0004 LP3−0.1571 LP2+21.006 LP−922.41, LP≧131.

Abstract: A color cathode ray tube includes an electron gun having an electron beam generating portion arrayed in a horizontal direction for generating three electron beams, and a main lens for focusing the three electron beams upon a fluorescent face, and a deflection yoke for scanning the three electron beams. The main lens has electrodes with three electron beams passages including a central electron beam passage and side electron beam passages. The main lens includes an accelerating electrode supplied with an accelerating voltage, a first focusing electrode supplied with a first focusing voltage, and a second focusing electrode supplied with a second focusing voltage. An axially asymmetric electron lens is formed between the first focusing electrode and the second focusing electrode.

Abstract: A cathode ray tube has an anode of a large-diameter cylinder portion on its phosphor screen side and a small-diameter cylinder portion on its cathode side connected together, and a focus electrode formed of a large-diameter cylinder portion of a diameter larger than that of the small-diameter cylinder portion of the anode and a small-diameter cylinder portion having a diameter smaller than that of the small-diameter cylinder portion of the anode, the large-diameter and small-diameter cylinder portions being connected together. The large-diameter cylinder portion of the focus electrode is disposed concentrically within the large-diameter cylinder portion of the anode. The anode and a first electrode facing a cathode side end of the focus electrode are electrically connected together within the cathode ray tube. The following relationship is satisfied: −LP+184.9≧LG4≧0.0004 LP3−0.1571 LP2+21.006 LP−922.41, LP≧131.

Abstract: Each of an anode and one of the sub-electrodes of a main lens of a shadow mask color cathode ray tube includes a first member having a single opening in their facing ends, and a second member having three beam apertures, wherein (A+566)/106>H−2×S is satisfied, where A is V1×V2×T, V1 is a vertical diameter of the opening, V2 is a vertical diameter of the center beam aperture, T is a distance between the opening and the second electrode member, H is a horizontal diameter of the opening, S is P×L/Q, where P is a horizontal center-to-center spacing between adjacent phosphor elements, Q is a spacing between the phosphor screen and the shadow mask, and L is a distance between the shadow mask and the opening in the first member.