An air flow rate sensor and throttle valve which controls the opening of a duct in accordance with the detection signals from the air flow rate sensor are provided in a control duct between a supply chamber utilizing double ceilings and the air diffusers in the supply chamber. The quantities of air fed from the respective air diffusers can be equalized or can be set to the desired values. In this case, since the air blowing can be automatically controlled for each diffuser, it is not necessary to individually adjust the quantities of air for the respective air diffusers after the installation of the air conditioner, thereby eliminating the adjusting works of the air diffusers.

Air conditioning apparatus

An electron gun for a color picture tube is disclosed in which three parallel electron beams emitted toward a fluorescent screen (3) and arranged so as to define one and the same plane are focused on the fluorescent screen by a main lens, electrodes (11,12) constituting the main lens are spaced apart from each other, the electrodes include at least two envelopes (131, 141) and electrode plates (133, 143) disposed at the confronting end faces of the envelopes, each of the electrode plates (133, 143) has a single aperture (135, 145) for transmitting a central one of the electron beams, the path of each outer electron beam is surrounded partly by one of end portions of each electrode plate, and at least one of the electrode plates (133,143) is placed in a corresponding one of the envelopes such that the electrode plate is recessed from the end face of the corresponding envelope confronting the other envelope.

Electron gun for color picture tube

A color cathode ray tube apparatus of this invention includes an electron gun. In the electron gun, an intermediate electrode is arranged at the mechanical center between a focus electrode and anode electrode that form a rotationally symmetric bi-potential lens. A disk-like intermediate electrode is arranged at the mechanical center between the focus electrode and intermediate electrode. The disk-like intermediate electrode has an electron beam hole with a diameter larger in the vertical direction than in the horizontal direction. The intermediate electrode has a circular electron beam hole. Voltages are applied to the disk-like intermediate electrode and intermediate electrode such that they form an electron lens similar to that formed when the disk-like intermediate electrode does not exist. Therefore, an electron beam spot is focused in an optimal manner on the entire surface of a phosphor screen, and elliptic distortion is decreased. A good image is displayed on the entire surface of the phosphor screen.

Color cathode ray tube apparatus

A curve formed by an inner surface of a face panel in a cross-section including a tube axis of a color picture tube is defined. The face panel includes at least one cross-section in which the curve has an inflection point between a center of the face panel and a circumferential edge of an effective display region. Assuming that a maximum value of an angle formed by a tangent of the curve and a plane orthogonal to the tube axis between the center of the face panel and the inflection point is θA, and a minimum value of an angle formed by the tangent of the curve and the plane orthogonal to the tube axis between the inflection point and the circumferential edge of the effective display region is θB, the curve having the inflection point satisfies 0.6≦θB/θA<1.0. Because of this, a color picture tube having satisfactory screen quality can be provided.

Color picture tube

A color cathode-ray tube including a main lens section comprising an anode to which an anode voltage is applied, and a focus electrode. The focus electrode has first type of focus electrode group to which a first focus voltage is applied, and a second type of focus electrode group to which a second focus voltage is applied which is obtained by superposing on a predetermined voltage a voltage that changes depending upon the deflecting amount of the electron beams. Between the first type of focus electrode group and the second type of focus electrode group are formed in a dynamic lens and an electrostatic quadrupole lens. Three electron beam passage holes are formed in the electrodes that form the dynamic lens and the centers for the outer electron beam passage holes in the first type of focus electrode group are deviated relative to the centers of the outer electron beam passage holes in the second type of focus electrode group in the horizontal direction. The electrostatic quadrupole lens exhibits different intensities for the outer electron beams relative to the center electron beam.

Color cathode ray tube

A color picture tube of an in-line type comprises means for deflecting beams of electron emitted from electron guns of the in-line type aligned horizontally such that for the horizontal deflection, the central beam is subjected to a greater deflection than side beams and for the vertical deflection, the side beams are subjected to a greater deflection than the central beam. Two vertical magnetic pole piece plates which are long vertically and thin horizontally are so disposed as to sandwich the central beam near the outlet of the central electron gun in order to weaken horizontal deflection magnetic field acting on the central beam, whereby a portion of the horizontal deflection magnetic flux acting on the central beam is absorbed by the two magnetic pole piece plates. The vertical deflection magnetic field is almost not affected by these vertical magnetic pole piece plates. Further, two horizontal magnetic pole piece plates which are long horizontally and short vertically are so disposed as to sandwich side beams near the outlets of the side electron guns in order to weaken vertical deflection magnetic fields acting on the side beams and to intensity vertical deflection magnetic fields acting on the central beam.

PURPOSE: To compensate the dynamic convergence error in arc shape due to the sealing error of electronic gun and the assembling error of deflection coil, by providing magnets around the external circumference of the neck part between the tip of electronic gun and the deflection center of deflection coil. COPYRIGHT: (C)1978,JPO&Japio

Color receiving tube

An in-line stripe type color picture tube comprises an inner magnetic shield member having sufficient shield effect against both individual vertical and horizontal components of the earth magnetism and composite components as well. The inner magnetic shield member prevents unwanted shifts of electron beams to ensure that the positional relationship between a fluorescent screen and landing electron beams may have sufficient tolerances and color blur on the fluorescent screen may be prevented.

Color picture tube with internal funnel shaped magnetic shield

A color misalignment correction device for use in a color picture tube, in which at least two magnets are disposed rotatably and adjustably on the outer peripheral surface of the cathode-ray bulb so as to correct an arc-shaped convergence error appearing in a horizontal direction of the phosphor screen due to a mounting error of the electron guns in the color picture tube or due to a mounting error of the deflection coil assembly on the color picture tube.

Color misalignment correction device for color picture tube

PURPOSE:Magnetic field control elements are provided near the discharge plot of the electron beam of the in-line electron gun, so that the difference in deflection sensitivity can be eliminated for the case when the pattern by the both side beams crosses the pattern by the central beam.

Koichi Maruyama

Papers

Color picture tube

Color receiving tube

Color picture tube with internal funnel shaped magnetic shield

Color misalignment correction device for color picture tube

Color picture tube with deflection magnetic field control elements