Abstract: An optical disc device includes a position detector which detects a position of the pickup in accordance with a output signal from the first light receiver of a position sensor which receives light from a encoder board, a rotation position detector which detects a rotation position of the disc in accordance a output signal from the second light receiver which receives a reflected light or a transmitted light of the light irradiated onto the variable area of the disc, and a controller which controls a recording dot marks on a label surface of the disc by driving a feed motor to move the pickup based on the rotation position detected by the rotation position detector and the position detected by the position detector and driving the pickup to control a intensity of the laser light in accordance with the rotation position detected by the rotation position detector.

Abstract: According to one embodiment, an automotive display apparatus includes an image projection unit and a control unit. The image projection unit is configured to project a light flux including an image by using a reflecting unit to reflect the light flux. The control unit is configured to control an operation of the image projection unit so that the image projection unit moves a projection region of the light flux by an amount substantially proportional to (Vc)2×? from a predetermined initial position in a horizontal direction orthogonal to an optical axis of the light flux projected toward the predetermined initial position, where the Vc is a velocity of a vehicle and the ? is a steering angle of the vehicle.

Abstract: An optical disc includes a SPOKE potion for detecting a position in a circumferential direction of the optical disc, which is formed on an inner or outer circumferential side relative to a data recording area and visible image drawing area. A signal portion in which each signal is constituted by a pair of light nonreflecting portion and light reflecting portion is formed in the SPOKE portion. The signal portion includes a first signal portion in which signal widths of the nonreflecting portion and reflecting portion are the same and a second signal portion in which the signal widths of the nonreflecting portion and reflecting portion are changed.

Abstract: An optical disc device includes a position detector which detects a position of the pickup in accordance with a output signal from the first light receiver of a position sensor which receives light from a encoder board, a rotation position detector which detects a rotation position of the disc in accordance a output signal from the second light receiver which receives a reflected light or a transmitted light of the light irradiated onto the variable area of the disc, and a controller which controls a recording dot marks on a label surface of the disc by driving a feed motor to move the pickup based on the rotation position detected by the rotation position detector and the position detected by the position detector and driving the pickup to control a intensity of the laser light in accordance with the rotation position detected by the rotation position detector.

Abstract: An optical disk drive includes a pickup main body that radiates a laser beam to a surface or a region of an optical disk, where no track information is present, thereby recording and/or reproducing predetermined information on the surface or the region, and that is movable in a radial direction of the optical disk, a position sensor for detecting movement and/or a position of the pickup main body, and a control unit that controls the position of the pickup main body and/or an objective lens on the basis of information relating to the movement and/or position of the pickup main body that is detected by the position sensor.

Abstract: An optical disk includes a label recording surface capable of recording a visible image using laser beam, and an information recording surface on which information is formed as marks on a track. Settings of circuit elements such as a switching unit and a digital equalizer included in a tracking control circuit for use at the times of recording and reproducing of the information with respect to the information recording surface are changed to constitute a feed motor control section. At the time of label recording, a position of an pickup in a radial direction of the disk is controlled using a feed motor control section, and the laser beam corresponding to image data input from a host device is produced to form the visible image on the label recording surface.

Abstract: A disc reproducing method for reproducing a disc carrying signals recorded using a CLV system. The disc reproducing method includes a step of dividing a data area on a disc into an inner data area and an outer data area by using a given track as a border, and a step of reading data from the inner data area using a CAV system while reading data from the outer data area using a CLV system.

Abstract: A method for forming a transparent multilayer is described, using a wet-on-wet process in which first a transparent acrylic copolymer paint A and then a transparent fluorine-containing polymer paint B comprising the formula ##STR1## wherein X represents a fluorine atom or chlorine atom, and R.sub.1, R.sub.2, R.sub.3, R.sub.4 each represents represents a hydrogenatom, hydroxyalkyl group, or carboxyalkyl group, are applied on a conventional finish coating.The method produces a protective multilayer consisting of a paint A layer to improve adhesion and a paint B layer to improve weatherability on the conventional finish coatings.