Abstract: A pixel includes at least first to fourth semiconductor tiers. The first semiconductor tier includes a first semiconductor region that is electrically connected to a first external circuit, a second semiconductor region, and a third semiconductor region that is isolated from the first semiconductor region by the second semiconductor region and that is electrically connected to a second external circuit. The second semiconductor tier includes a MOS transistor that has insulating films and gate conductive electrodes that are electrically connected to a third external circuit. The third semiconductor tier includes a photodiode formed of the second and fourth semiconductor regions. A junction transistor is formed in which the fourth semiconductor region serves as a gate and in which one of the first and fifth semiconductor regions serves as a drain and the other serves as a source.

Abstract: Disclosed is a slim-type high speed rotation optical disk apparatus having a turn table for loading an optical disk thereon. As compared with conventional ones, a brake pad is located near to the front end so that the brake pad comes into tight contact with a side of the tray's front portion when the tray is inserted. This reduces the noise and vibration of the optical disk apparatus.

Abstract: Each pixel of a solid state imaging device comprises: a first semiconductor layer; a second semiconductor layer; a third semiconductor layer and fourth semiconductor layer formed on the lateral side of the upper region of the second layer not to be in contact with the top surface of the second semiconductor layer; a gate conductor layer formed on the lower side of the second semiconductor layer; a conductor electrode formed on the side of the fourth semiconductor layer via an insulating film; and a fifth semiconductor layer formed on the top surface of the second semiconductor layer, wherein at least the third semiconductor layer, upper region of the second semiconductor layer, fourth semiconductor layer, and fifth semiconductor layer are formed in the shape of an island. A specific voltage is applied to the conductor electrode to accumulate holes in the surface region of the fourth semiconductor layer.

Abstract: Each pixel of a solid state imaging device comprises a first semiconductor layer formed on a substrate, having a first-conductive type; a second semiconductor layer formed thereon, having a second-conductivity type; a third semiconductor layer formed in the upper side of the second semiconductor layer, having the first-conductivity type; a fourth semiconductor layer formed in the outer side of the third semiconductor layer, having the second-conductivity type; a gate conductor layer formed on the lower side of the second semiconductor layer via an insulating film; and a fifth semiconductor layer formed on the top surfaces of the second semiconductor layer and third semiconductor layer, having the second-conductivity type, wherein the fifth semiconductor layer and fourth semiconductor layer are connected to each other, and at least the third semiconductor layer, upper region of the second semiconductor layer, fourth semiconductor layer, and fifth semiconductor layer are formed in an island.

Abstract: In an optical disc drive, a degradation of traveling performance of an optical pickup under hard acceleration or hard deceleration in a random access operation or the like results in a degradation of recording/reproducing performance. Groove structure is provided between two gears of a guide feed provided in an optical pickup, and the groove forms bending structure. Thus, the engagement state between a screw gear and the gears of the guide feed is stabilized. This makes it possible to prevent tooth jumping and step-out from occurring in the gears during the traveling of the optical pickup, achieving stable traveling. In consequence, the recoding/reproducing performance of the optical disc drive can be improved.

Abstract: An optical disc drive with low vibration and low noise without risk of damage to components and injury caused by ejection of the disc tray with the rotating optical disc from a housing is provided by simple structure. In a disc-tray scheme of the optical disc drive, a brake member attached to the inside of the housing is placed to be in contact with the optical disc sliding thereon when the disc tray is in a predetermined position except the disc recording/reproducing position and the disc loading/unloading position, and to be connected to the disc tray when the disc tray is in the disc recording/reproducing position.

Abstract: An optical disc apparatus, presenting recording quality without degradation by an extreme temperature rise in an objective-lens drive mechanism in an optical pickup, includes a mechanical chassis on which a disc rotation mechanism, an optical pickup, and a transfer mechanism are mounted, a decorative plate that is a plate-shaped member located between the disc and the optical pickup and fixed on the mechanical chassis, a disc tray for loading and removing the disc, a circuit board for operation control, and an apparatus housing containing the components. A recess is formed in an indented shape in a portion of the mechanical chassis facing an outer peripheral region of the disc recording surface. An incline is formed in a position close to an opening of the disc tray for mounting the mechanical chassis and opposite the outer peripheral region of the disc recording surface, and slopes gently down to the recess.

Abstract: An optical disc apparatus comprises the followings within housing thereof: an optical pickup, which is configured to conduct recording or reproducing of a disc, as an information recording medium; a rotation mechanism of said disc; a transfer mechanism, which is configured to move said optical pickup from an inner periphery of said disc up to an outer periphery thereof; a mechanical chassis, which is configured to mount said optical pickup, said disc rotation mechanism and said transfer mechanism thereon; a disc tray, which is configured to conduct storing and taking out of said disc; and a connector, which is configured to electrically connect between a circuit board for conducting driving control of said rotation mechanism and an external electronic apparatus, wherein a projection portion is provided on a reverse surface of said disc tray, at a portion facing to said connector at a position when said disc tray is stored, to be inserted into a gap between periphery of said connector and said housing, and the

Abstract: In an optical disk apparatus, an ejection lock mechanism includes three (3) arm portions; i.e.

Abstract: A disc drive apparatus comprises: a spindle motor 20 for hold a disc 2 and for rotate it; an optical head 7 for conducting either one of recording or reproducing of information onto/from the disc; a driver unit for moving the optical head in a radial direction of the disc; and a unit mechanism chassis 8 for supporting those thereon, fixedly, wherein the spindle motor is constructed with a rotational drive means made of a magnetic circuit, a rotor portion and a rotation shaft, which define a rotation body, and a spindle motor attachment plate to hold those thereon, and the spindle motor attachment plate has a semi-circular shaped plate configuration in a part thereof, nearly fitting to an outer diameter the rotor portion, in a direction where the optical head is provided, and has a step-like structure in thickness direction of the plate thereof, within a semi-circular shaped region with respect to a line connecting between corner portions on both ends of that semi-circular shape, and also bridging over that li

Abstract: An optical disc apparatus has the following arrangements. Specifically, the optical disc apparatus includes a lock pin and a lock arm. The lock pin is disposed on a side of an inner surface of a case of the apparatus, being tapered in a protruding direction thereof. The lock arm is disposed on a side of a tray of the apparatus. The lock arm, urged by a resilient member, includes a hook portion to be engaged with an inclined surface of the lock pin. When the tray has moved to a predetermined position within the case, the lock arm is engaged with the lock pin, so that the tray is held in position at the predetermined position. When an impact force equal to, or more than, a predetermined value is applied to the optical disc apparatus, the hook portion of the lock arm is displaced in the protruding direction of the lock pin along the inclined surface of the lock pin, thereby disengaged from the lock pin. Engagement of the tray is thereby released.

Abstract: An optical disk device is provided to carry out a stable operation of a reflection-type photo sensor which detects a position of an optical pickup unit and to simplify an assembly process.

Abstract: An optical disc apparatus capable of being thinned and lightened while ensuring a mechanical strength and a stiffness, and also capable of restraining sticking of an FPC and reducing the sliding resistance of the FPC, comprises a frame, a motor arranged in the frame, for rotating an optical disc loaded in the optical disc apparatus, an optical pickup arranged in the frame so as to be movable in a radial direction of the optical disc, for carrying out at least one of recording and reproduction of signals onto and from a data recording surface of the loaded optical disc, an FPC arranged in the frame, for connecting between the optical pickup and a circuit board, and a unit cover for covering the frame on the mounting surface side of the optical disc, the unit cover having a first zone including an area made into contact with the FPC, and second zones projected toward the mounting surface side of the optical disc from the first zone and located on opposite sides of the first zone so as to interpose a part of the

Abstract: An optical disc drive comprises: a disc tray 3, which is configured to be used for loading/ejecting of a disc 2 as information recording medium; an optical pickup member 7, which has a laser element 8a for oscillating a laser light therefrom, to be irradiated on the disc 2; a disc rotating mechanism, which is configured to rotate the disc 2; a transferring mechanism, which is configured to move the optical pickup member 7 between an inner periphery portion and an outer periphery portion of the disc 2; and a decorative laminated board 10, which is provided between the disc 2 loaded and a controller portion mounted, wherein the decorative laminated board 10 has a wind guidance opening 21, for guiding an air into an area facing to the laser element 8a of the optical pickup member 7 when the optical pickup member has moved to the outermost periphery portion of the disc 2 to be rotated, and the disc tray 3 has a wind guidance wall 22 on a surface thereof, facing to the optical pickup member 7 having moved to an ou

Abstract: In a prior art slim-type high speed rotation optical disk apparatus, the side wall of the bottom chassis is bent at a bending point toward the side of the optical disk according to the configuration of the corner air window section of the chassis. According to the present invention, this bent side wall is formed so as to have a first vertical wall which is adjacent to the bending point and a second vertical wall which is adjacent to and lower than the first vertical wall. This constitutes an L-shaped vertical wall in the air window section of the bottom chassis, resulting in reduced noise.

Abstract: Disclosed is a slim-type high speed rotation optical disk apparatus having a turn table for loading an optical disk thereon. As compared with conventional ones, a brake pad is located near to the front end so that the brake pad comes into tight contact with a side of the tray's front portion when the tray is inserted. This reduces the noise and vibration of the optical disk apparatus.

Abstract: There are provided a disk motor arranged on a chassis, an optical pickup that performs recording and reproducing of a signal from an information recorded surface of an optical disk, a pair of guide shafts arranged on the optical pickup to guide the optical pickup radially of the optical disk, adjustment screw that move at least one ends of the guide shafts in a direction substantially perpendicular to a surface of the chassis, a leaf spring arranged on a frame body to bias the one end of the guide shaft toward the surface of the chassis, and the leaf spring includes a support surface that supports the one end of the guide shaft, and a stopper portion projecting from the support surface to define a clearance between the support surface and the surface of the chassis.

Abstract: In an optical disc apparatus, a metallic member forming an optical pickup, such as a bottom cover member of the optical pickup, has a protrusion in an integral form on the portion of the metallic member that is opposed to a plane of a flexible printed-wiring board, and the optical pickup is constructed so that when it comes into contact with an opposed face of the flexible printed-wiring board, the optical pickup brings a front end of the protrusion into contact with the opposed face.

Abstract: For the purpose of suppressing an increase of temperature of a laser element, in an optical disc drive, even in case when recording/reproducing at such a low double speed that almost no expectation can be made upon the effect of the convection cooling due to circulating flow of an air, which is generated by rotation of a disc, and in particular, the structure for fixing both end portions of a main shaft, which is engaged with a transfer mechanism for moving an optical pickup into the disc radial direction, through the optical pickup, between two (2) pieces of shafts for supporting the optical pickup, onto connector portions to be engaged with the both end portions of the main shaft, upon a mechanical chassis, on which is mounted at least a disc rotation mechanism, etc., has structures for enlarging a contacting area defined between the both end portions of the main shaft and the connector portions or pressure plates, each building up the connector portion (for example, a comb-like configuration).

Abstract: To prevent deformation of a chassis due to an impact force in an optical disc apparatus, there is provided a tray for inserting/ejecting an optical disc into/from an apparatus body, with the chassis connected thereto through vibration proof materials in plural portions in a surface opposite a disc placing surface. The tray has projecting portions projecting in a chassis direction in positions facing the chassis in peripheral portions of the plural connecting portions. The projecting portion is located at a position higher than a tray plane with which the vibration proof material comes into contact, and lower than the surface of a chassis facing the tray. When the vibration proof material is compressed and deformed due to the impact force, the projecting portion comes into contact with the chassis facing surface, to reduce the amount of deformation of the vibration proof material and thereby prevent deformation of the chassis.