Abstract: The present invention provides a disc drive apparatus that can effectively prevent the part of the flexible printed circuit board that cannot be covered by the top cover from coming out to the outside through the aperture of the top cover when the flexible printed circuit board displaces its folded position, following the movement of the optical pickup that is being fed. The disc drive apparatus includes a cabinet, a disc drive unit contained in the cabinet, and a circuit substrate carrying a drive control circuit for controlling the operation of driving the disc drive unit. The disc drive unit includes a disc rotary drive mechanism, an optical pickup, a pickup feed mechanism, a base, a flexible printed circuit board, and a top cover.

Abstract: In a manufacturing method of a color cathode ray tube, as an exposure light source which is used in the exposure for forming a phosphor screen, an ultra-high pressure mercury lamp having an arc length of 35 to 60 mm is used. According to the present invention, it is possible to make an aperture shape of a black matrix film of a color cathode ray tube uniform and it is also possible to enhance the operational efficiency.

Abstract: The present invention is directed to an optical pick-up apparatus used for recording/reproduction of an optical disk, which comprises an optical pick-up (17) caused to undergo feed operation in the radial direction of optical disk (2), and for performing write or read operation of information signals with respect to the rotating optical disk, and a flexible printed wiring board (45) having one end portion (45a) connected to the optical pick-up, and the other end portion (45d) provided in a manner extended in the feed direction of the optical pick-up.

Abstract: The present invention is directed to a disk drive apparatus in which an optical disk (2) is detachably loaded, and comprises a casing (3) including a front panel (18) in which a disk insertion/withdrawal hole (19) of which length in length direction is caused to be substantially the same as the diameter of the optical disk, and a biasing member (70) for biasing plural rotational arms (61), (62) for holding the outer circumference of the optical disk therebetween in a predetermined direction in accordance with carrying position of the optical disk, wherein, between the disk insertion/withdrawal position and the disk loading position, there are provided a disk carrying mechanism (60) for performing carrying operation of the optical disk, a disk loading portion (41) to which the optical disk is loaded, a disk rotation drive mechanism (42) for optical disk, an optical pick-up (43) for performing recording and/or reproduction of information signals with respect to the optical disk, and a pick-up feed mechanism (44

Abstract: In an exposure step for forming a phosphor screen of a color cathode ray tube, correction lenses which are arranged between a light source and a panel are used in a state that a common correction lens which is used in common for three colors and three kinds of monochroic correction lenses are combined. The present invention can, in a flat-face-type color cathode ray tube, prevent the generation of the mislanding attributed to the difference in a wall thickness between a center portion and a peripheral portion of a panel thus improving the color purity.

Abstract: A correction filter used in the exposure for forming a phosphor screen includes three kinds of correction filters consisting of a grading filter, a monochroic local correction filter and a multi-color local correction filter. With the use of three kinds of correction filters, it is possible to improve the whiteness uniformity which may be degraded due to the wall thickness difference at the center and a peripheral portion of a panel portion of a flat-face-type color cathode ray tube.

Abstract: To provide a disc drive device which can discharge a disc in an optimum discharge amount in the disc drive device dealing with a disc having different thickness and weight.

Abstract: A color cathode ray tube has stress-absorbing hole patterns in skirt portions of its color selection electrode. Each of the stress-absorbing hole patterns is composed of a plurality of columns of rectangular through holes, and the columns are arranged in a lengthwise direction of the skirt portions. Each of the plurality of columns of rectangular through holes is composed of rectangular through holes arranged in a widthwise direction of the skirt portions. The relationships in shape of the rectangular through holes among outermost columns, columns next to the outermost columns, and remaining columns is optimized in the stress-absorbing hole patterns.

Abstract: A common optical pickup can be mounted in any of disc drive units having respective pairs of oppositely disposed guide shafts that are separated from each other by different distances.

Abstract: The present invention provides a disc drive apparatus that can effectively prevent the part of the flexible printed circuit board that cannot be covered by the top cover from coming out to the outside through the aperture of the top cover when the flexible printed circuit board displaces its folded position, following the movement of the optical pickup that is being fed. The disc drive apparatus includes a cabinet, a disc drive unit contained in the cabinet, and a circuit substrate carrying a drive control circuit for controlling the operation of driving the disc drive unit. The disc drive unit includes a disc rotary drive mechanism, an optical pickup, a pickup feed mechanism, a base, a flexible printed circuit board, and a top cover.

Abstract: Disc drive units out of the tolerance for assembling errors are rejected by narrowing the skew regulation range for them.

Abstract: A disc drive apparatus comprises a housing; a disc-holding unit that holds an optical disc in the housing; a disc-driving mechanism that rotates the optical disc held by the disc-holding unit; an optical pickup that writes signals in, and reads signals from, the optical disc being rotated by the disc-driving mechanism; and a pickup-moving mechanism that moves the optical pickup in a radial direction of the optical disc. The housing has an air-inlet port which is located above the optical disc held by the disc-holding unit and through which air is drawn from outside by virtue of an airflow that develops as the optical disc is rotated, and air-outlet ports through which air is discharged from the housing.

Abstract: There is provided a disk drive including a base chassis, a first optical pickup mechanism including a disk rotation drive disposed on the base chassis, first optical pickup unit to write and/or read data to and/or from a first optical disk and a first pickup moving mechanism to move the first optical pickup unit radially of the first optical disk, a second optical pickup mechanism disposed opposite to the first optical pickup mechanism and including a second optical pickup unit to write and/or read data to and/or from a second optical disk and a second pickup moving mechanism to move the second optical pickup unit radially of the second optical disk, and a controlling means for detecting the movement of one of the optical pickup units and moving the other optical pickup unit to make weight balancing of the base chassis. Thus, the base chassis weight is balanced while one of the two optical pickup units is being moved.

Abstract: An image transmitting apparatus and an image forming apparatus are provided whereby when the image transmitting apparatus transmits to the image forming apparatus data designating that multiple sets of identical images are to be printed. The user of the image forming apparatus can correctly understand that multiple sets of identical images have been sent.

Abstract: A color cathode ray tube has stress-absorbing hole patterns in skirt portions of its color selection electrode. Each of the stress-absorbing hole patterns is composed of a plurality of columns of rectangular through holes, and the columns are arranged in a lengthwise direction of the skirt portions. Each of the plurality of columns of rectangular through holes is composed of rectangular through holes arranged in a widthwise direction of the skirt portions. The relationships in shape of the rectangular through holes among outermost columns, columns next to the outermost columns, and remaining columns is optimized in the stress-absorbing hole patterns.

Abstract: The present invention provides an excellent color cathode ray tube of a black matrix type which can reduce the irregularities of a phosphor screen, can exhibits the uniformity of screen, can exhibit the favorable quality of screen, and can obtain the image display of high quality. The size T of a boundary portion between a large hole and a small hole of each electron beam aperture formed in a shadow mask is made small and the surface roughness of an inner surface is made small so that the Irregularity index which expresses the uniformity of the phosphor screen can be set to a value not greater than 7%.

Abstract: A cathode ray tube has a panel portion 1 with a phosphor layer 5 formed on its inner face, a neck portion 2 accommodating an electron gun 9, a funnel portion 2 for coupling the panel portion 1 to the neck portion 2 and a color selective electrode assembly 6 having a number of electron beam passing openings arranged opposite to the phosphor layer 5 with a space therebetween. The color selective electrode assembly is installed within the panel portion 1. An electron beam reflection film of a bismuth oxide thin film 6R having a bulk density of at least 1 g/cm3, e.g., from 1 to 9.3 g/cm3, is formed on the face of the color selective electrode assembly 6 against which the electron beams 14 emitted from the electron gun 9 collide. The cathode ray tube is capable of displaying high density and high resolution image.

Abstract: A cathode ray tube has a panel portion 1 with a phosphor layer 5 formed on its inner face, a neck portion 2 accommodating an electron gun 9, a funnel portion 2 for coupling the panel portion 1 to the neck portion 2 and a color selective electrode assembly 6 having a number of electron beam passing openings arranged opposite to the phosphor layer 5 with a space therebetween. The color selective electrode assembly is installed within the panel portion 1. An electron beam reflection film of a bismuth oxide thin film 6R having a bulk density of at least 1 g/cm3, e.g., from 1 to 9.3 g/cm3, is formed on the face of the color selective electrode assembly 6 against which the electron beams 14 emitted from the electron gun 9 collide. The cathode ray tube is capable of displaying high density and high resolution image.

Abstract: A cathode ray tube has a panel portion 1 with a phosphor layer 5 formed on its inner face, a neck portion 2 accommodating an electron gun 9, a funnel portion 2 for coupling the panel portion 1 to the neck portion 2 and a color selective electrode assembly 6 having a number of electron beam passing openings arranged opposite to the phosphor layer 5 with a space therebetween. The color selective electrode assembly is installed within the panel portion 1. An electron beam reflection film of a bismuth oxide thin film 6R having a bulk density of at least from 41 g/cm3, to 9.3 g/cm3, e.g., is formed on the face of the color selective electrode assembly 6 against which the electron beams 14 emitted from the electron gun 9 collide. The cathode ray tube is capable of displaying high density and high resolution image.

Abstract: A cathode ray tube has a panel portion 1 with a phosphor layer 5 formed on its inner face, a neck portion 2 accommodating an electron gun 9, a funnel portion 2 for coupling the panel portion 1 to the neck portion 2 and a color selective electrode assembly 6 having a number of electron beam passing openings arranged opposite to the phosphor layer 5 with a space therebetween. The color selective electrode assembly is installed within the panel portion 1. An electron beam reflection film of a bismuth oxide thin film 6R having a bulk density of from 4 to 9.3 g/cm.sup.3 is formed on the face of the color selective electrode assembly 6 against which the electron beams 14 emitted from the electron gun 9 collide. The cathode ray tube is capable of displaying high density and high resolution image.