Abstract: Based on an output signal from a light-emission characteristic correction portion, a data voltage supply portion supplies data voltage to pixels and a light-emission quantity detector detects light-emission quantities of each pixel. The light-emission characteristic correction portion includes a display signal processor for subjecting display signal data to a correction based on a light-emission characteristic held in a memory; a test signal supply portion for generating a test signal in order to apply a test voltage to each pixel; a mode control portion for outputting the output from the display signal processor or the test signal to the data voltage supply portion; and a light-emission characteristic detection portion for detecting the light-emission characteristic of each pixel based on the light-emission quantity detection value and the test signal.

Abstract: On an outer circumferential surface of a neck portion of a funnel, a CPU having a pair of quadrupole magnets and a pair of bar-shaped magnets each having magnetic poles on both sides in a major axis direction are provided. The pair of bar-shaped magnets sandwich the neck portion substantially in an in-line direction of an in-line type electron gun, and are provided so that identical poles are opposed to each other, between an end plate of an insulating frame of a deflection yoke and the CPU at a distance from the end plate. In the case where a rotational shift of electron beams is caused, electron beams R and B are corrected so as to move upward and downward (or downward and upward) respectively by a quadrupole magnetic field generated by the quadrupole magnets. Then, the electron beams R and B are corrected so as to move downward and upward (or upward and downward) respectively by the quadrupole magnetic field generated by the pair of bar-shaped magnets.

Abstract: A mask main body 17 includes an effective surface 14 in which electron beam passage holes 13 are formed, and a hole-free portion 15 surrounding the effective surface 14. When we let Ry be the radius of curvature of a curve in the Y axis direction of the effective surface 14 of the mask main body 17, let Rx be the radius of curvature of a curve in the X axis direction, calculate the radius of curvature Rk of the curved surface on the effective surface 14 as Rk2=Rx×Ry, and let Rk(d) be the radius of curvature of the curved surface near the diagonal axis ends of the effective surface 14, Rk(h) be the radius of curvature of the curved surface near the X axis ends, and Rk(c) be the radius of curvature of the curved surface in the center portion, the following relations are satisfied: Rk(c)>Rk(h), Rk(c)>Rk(d), and ?800 mm?Rk(h)?Rk(d)?800 mm.

Abstract: A conductive film isolated from an inner conductive film is formed on an inner wall of a neck. Assuming that, among a plurality of focusing electrodes constituting an electron gun, a position in a tube axis direction of an end on an anode side of an anode-side focusing electrode placed at a position closest to the anode side is P0; among electrodes supplied with substantially the same voltage as that of the anode-side focusing electrode and arranged continuously from the anode-side focusing electrode, a position in the tube axis direction of an end on a beam generating portion side of an electrode placed at a position closest to the beam generating portion side is P1; in the tube axis direction, a position of an end on the beam generating portion side of the conductive film is PL1 and a position of an end on the panel side of the conductive film is PL2, the position P0 is placed between the position PL1 and the position PL2.

Abstract: The radius of curvature of an outer surface of a useful portion of a panel is 10,000 mm or more, and a shadow mask is made of a material containing 95% or more of iron. Assuming that a distance (unit: mm) along an X-axis between a center of the panel and a peripheral edge of the useful portion is LH, and a total number of rows of apertures composed of electron beam passage apertures arranged on a straight line substantially parallel to a Y-axis is N, 0.9?LH/N?1.0 is satisfied. Furthermore, assuming that a pitch of adjacent rows of apertures is PHC at a center of a perforated region of the shadow mask, PHH at a major axis end of the perforated region, and PHM at a point away from the center of the perforated region by 2/3 of a distance MH between the center of the perforated region and the major axis end along the X-axis, PHM/PHC?1.2 and PHH/PHC?1.4 are satisfied.

Abstract: When we let the aspect ratio of the fluorescent screen of a cathode ray tube be M:N and, in a coordinate system in which the origin is a point on the tube axis and the horizontal axis and vertical axis intersect at right angles, when we let LA be the horizontal radius of the outer surface of a cone component 4, SA be the vertical radius, and ? be the angle formed by a horizontal axis H and an axis D in the direction of the maximum diameter on the inner surface of the cone component 4, then when the position Z on the tube axis, using as its origin a reference line position that serves as a reference for a deflection angle, is within a range of ?30 mm?Z?10 mm, a portion is included such that the angle ? and the values of M, N, LA(Z), and SA(Z) satisfy the relational formula ?=tan?1 [(N/M)×(LA(Z)/SA(Z))].

Abstract: There is provided a field emission display that can achieve high brightness without increasing the anode voltage, and can realize high resolution by suppressing the occurrence of inter-pixel crosstalk resulting from light excited from the phosphor layers. A field emission display is constructed by a field emission electron source disposed in a vacuum container and a phosphor screen that is disposed in the vacuum container so as to be opposite to the field emission electron source and that has a plurality of recessed portions on its surface opposing to the field emission electron source, with phosphor layers being formed in the recessed portions An image is displayed by causing the phosphor layers to emit light by collision of electrons emitted from the field emission electron source.

Abstract: The present invention provides a color picture tube apparatus in which YV and top and bottom trapezoidal distortions can be adjusted optimally even in a toroidal coil. A deflection yoke includes a horizontal deflection coil, a vertical deflection coil, and a ferrite core. The ferrite core is divided into an upper core 6 and a lower core 7. The vertical deflection coil is toroidally wound around each of the upper core 6 and the lower core 7. An upper core left coil 32 and an upper core right coil 34 are separated via a first intermediate tap 15, and a lower core left coil 34 and a lower core right coil 35 are separated via a second intermediate tap 26. A variable resistor that is connected to each of the coils in parallel and that is connected to at least either of the first or second intermediate tap 15 or 26 is provided.

Abstract: An electron source apparatus includes a plurality of electron emission portions arranged in a matrix on a Si substrate, and a plurality of emitter lines and a plurality of gate lines that are orthogonal to each other, and each of the plurality of electron emission portions being controlled by signals from the plurality of emitter lines and the plurality of gate lines to perform an independent electron emission operation.

Abstract: A plurality of scan electrodes and data electrodes, and a self-emission layer disposed between the two electrodes are provided, wherein a scan voltage is supplied sequentially to the scan electrodes, and data voltage that corresponds to the display signal data is supplied to the data electrodes. The emission layer of the portions at the intersection between the two electrodes defines pixels in two-dimensional arrangement. A single frame period is divided into a plurality of sub-fields, and the weight of emission luminance is set so that gradation is expressed by a combination of emission luminance in the sub-fields. The scan voltage has a waveform that corresponds to the weight in each sub-field, and the data electrodes are selectively put into on state by the data voltage in accordance with the display signal data. An emission luminance that corresponds to the weight is obtained with a voltage applied to the emission layer of each pixel between the scan electrodes and the data electrodes.

Abstract: Optical filter layers that transmit only light with a desired wavelength are provided in a non-formation region of an optical absorbing layer formed on an inner surface of a glass panel, and phosphor layers that emit either one of red, green, and blue light are provided on the optical filter layers. The optical filter layers transmit blue light. Assuming that the thickness of the optical filter layer underlying the phosphor layer that emits blue light is t1, and the thickness of the optical filter layers underlying the phosphor layers that emit red and green light is t2, a relationship: t1>t2 is satisfied. Because of the above configuration, a color cathode-ray tube is provided, which can be produced at low cost with satisfactory yield with less peeling of a phosphor layer.

Abstract: The present invention provides a cathode ray tube that is capable of increasing the effect of reducing the deflection power by increasing the effect of improving the horizontal deflection efficiency, while ensuring the air pressure resistance and preventing beam shadow neck. A vacuum envelope includes a neck component that contains an electron gun and a cone component that corresponds to a position where a deflection yoke is disposed. The cross sectional shape of the cone component in a direction perpendicular to the tube axis of the cathode ray tube includes a non-circular cross sectional shape having its maximum diameter in a direction other than directions of the long axis and short axis of a panel.

Abstract: A pair of coma aberration correction coils and a pair of YH correction coils are placed in upper and lower portions on an electron gun side from a ferrite core, and a pair of vertical auxiliary coils generating a magnetic field in the same direction as that of a vertical deflection magnetic field are placed in right and left portions on the electron gun side from the ferrite core. A horizontal deflection coil has a first coil and a second coil on an inner circumferential side of the first coil. A useful portion of the second coil is placed in a range of ±45° from a vertical axis with respect to a tube axis, and a bend portion of the second coil is placed on the electron gun side from a position that is away from the end on a screen side of the ferrite core to the screen side by 10 mm. Because of this, the misconvergence of PQH can be suppressed without increasing cost and power consumption with a simple configuration.

Abstract: The radius of curvature of an outer surface of a panel useful portion is 10,000 mm or more. Assuming that a length of a perforated region of a shadow mask in an X-axis (major axis) direction is 2L, s is a variable satisfying 0<s<1, a sagging amount difference of the useful portion at a point of X=sL with respect to a point of X=0 on the X axis and a sagging amount difference of the perforated region at a point of X=L with respect to the point of X=sL on the X axis are ?Z01(s) and ?Z02(s), respectively, a sagging amount difference of the useful portion at the point of X=sL with respect to the point of X=0 on the long side and a sagging amount difference of the perforated region at the point of X=L with respect to the point of X=sL on the long side are ?Z11(s) and ?Z12(s), respectively, when ?(s) represented by ?(s)=(?Z01(s)/?Z11(s))/(?Z02(s)/?Z12(s)) is defined, d?(s)/ds?0.4 is satisfied in at least a portion in a range of 0.2?s?0.8.

Abstract: An insulating frame of a deflection yoke is fixed to a funnel with a metal band and a metal screw. A partition formed so as to be integrated with a holder holding a magnet ring of a CPU includes a first partition provided on a first axis so as to hide the metal screw when the deflection yoke is seen from the holder side along a tube axis, and a second partition provided on a second axis orthogonal to the first axis. A height H1 of the first partition, a height H2 of the second partition, a minimum height Hmin of the partition, a height HM of a pull of a magnet ring on a side closest to the deflection yoke, and an outer circumferential edge diameter RM of the magnet ring excluding the pull satisfy relationships: H1>H2, HM?H2>10 mm, and Hmin>RM. Because of this, a discharge between a metal band and a metal screw that fix the deflection yoke, and a velocity modulation coil can be prevented without decreasing the operability of the rotation adjustment of the magnet ring of the CPU.

Abstract: An electron gun for use in a cathode-ray tube that can reduce a spot dimension of an electron beam when the electron beam is in a high current range and that can suppress moire when the electron beam is in a low current range, and a color cathode-ray tube equipped with the foregoing electron gun, are provided. In the case where a current of the electron beam is in a low current range, a maximum converging effect exerted on an outermost part in the vertical direction of the electron beam, in the vicinity of the third electrode side of electron beam passage apertures, is weaker than a maximum converging effect exerted on an outermost part in the horizontal direction of the electron beam.

Abstract: A pair of velocity modulation coils are placed with a horizontal plane including a tube axis interposed therebetween, and a pair of magnetic substances are placed with a vertical plane including a tube axis interposed therebetween. A straight line portion of the velocity modulation coil extending substantially in parallel to the tube axis is placed between the magnetic substance and the tube axis. An interval D between the magnetic substance and the straight line portion is 1 to 3 mm. Assuming that the tube axis is a Z-axis, a size of the velocity modulation coil in a tube axis direction is L, and a position of an end of the velocity modulation coil on a side opposite to a phosphor screen in the tube axis direction is Z=0, a center point of the pair of magnetic substances in the tube axis direction is present in a range of Z=0.2×L to 0.9×L. Consequently, the sensitivity of velocity modulation can be enhanced while suppressing an increase in a driving power with a simple configuration.

Abstract: The radius of curvature of the outer surface of a panel is 10,000 mm or more, and a shadow mask is made of a material containing 95% or more of iron. A sagging amount change curve along a curve C1 on the surface of the shadow mask, which a plane passing through a center P0 of a useful area of the shadow mask and parallel to a tube axis and a major axis crosses, satisfies a particular Condition 1. Assuming that an intersection between the curve C1 and a useful area end of the shadow mask is a major axis end PL, a distance from the center P0 to the major axis end PL along a major axis is W, and a point on the curve C1 away from the center P0 by ?×W in the major axis direction is P1, a sagging amount change curve along a curve C2 on the surface of the shadow mask, which a plane passing through the point P1 and parallel to the tube axis and the minor axis crosses, satisfies a particular Condition 2.

Abstract: A color cathode ray tube apparatus includes: a valve; a phosphor screen; an electron gun including an electron beam generating portion for generating three electron beams, a focusing electrode, an anode electrode, a first field correction electrode and a second field correction electrode; and a deflector for deflecting the electron beams emitted from the electron gun, wherein the focusing electrode, the first field correction electrode, the anode electrode and the second field correction electrode form an electron lens having a focusing force in a vertical direction, which is perpendicular to the horizontal direction, stronger than its focusing force in the horizontal direction inside the focusing electrode, and having a diverging force in the vertical direction greater than its diverging force in the horizontal direction inside the anode electrode, by applying a focus voltage to the focusing electrode and the first field correction electrode and applying an anode voltage higher than the focus voltage to the

Abstract: An electron gun includes an electron beam generating portion for generating electron beams (cathodes K, a G1 electrode and a G2 electrode) and an electron beam focusing portion (a G3 electrode, a G4 electrode, a G5A electrode, a G5B electrode, a G5C electrode and a G6 electrode). The electron beam focusing portion includes a first focus adjusting lens portion for varying a diverging angle of the electron beams likewise in both of a horizontal direction and a vertical direction and a second focus adjusting lens portion capable of making a focus adjustment of the electron beams independently of the first focus adjusting lens portion. Accordingly, it is possible to adjust various kinds of focus states with a single kind of structure of the electron gun.