Abstract: An automatic door apparatus of a projector is provided. The projector includes a case. The case has a heat discharging opening for discharging heat out of the projector. The automatic door apparatus includes: a frame disposed at the case, the frame facing the heat discharge opening; a door assembly reciprocally movable along the frame in a first direction for opening and closing the heat discharge opening; and a driving unit disposed in the case for moving the door assembly along the first direction, the driving unit moving the door assembly along the first direction from a first position to a second position to open the heat discharge opening in response to a first operation mode of the projector, the driving unit moving the door assembly along the first direction from the second position to the first position to close the heat discharge opening in response to a second operation mode of the projector.

Abstract: A disk cartridge and data recording/reproducing medium are disclosed. The disk cartridge includes: a disk housing including a disk receiving unit for rotatably receiving a disk, and an opening portion formed at a portion corresponding to a hub of the disk and formed where a pickup unit for recording/reproducing data to/from the disk while being rotationally moved on the disk moves; and a shutter for opening and shutting the opening portion.

Abstract: Disclosed is an optical disc cartridge comprising: a casing having a disc inserting/opening part for inserting and taking out a disc at an upper surface thereof and having an access hole to which an optical pickup accesses at a lower surface thereof; a pair of shutters mounted in the casing, for opening and closing the access hole and contact-supporting a disc at two points or at one point; a rotation wheel rotatably coupled to the shutters, for moving the shutters and placing an optical disc thereon; a wheel fixing/releasing means mounted at an inner side of the casing, for fixing or releasing the rotation wheel; and a disc fixing/releasing means movably mounted at the casing, for controlling a size of the disc inserting/opening part and thereby limiting an insertion/takeout of an optical disc into/from the disc inputting opening, and an apparatus of recording or reproducing data on or from an optical disc, comprising: a driving unit rotating an optical disc inserted in the optical disc cartridge; and a reco

Abstract: An automatic door apparatus of a projector is provided. The projector includes a case. The case has a heat discharging opening for discharging heat out of the projector. The automatic door apparatus includes: a frame disposed at the case, the frame facing the heat discharge opening; a door assembly reciprocally movable along the frame in a first direction for opening and closing the heat discharge opening; and a driving unit disposed in the case for moving the door assembly along the first direction, the driving unit moving the door assembly along the first direction from a first position to a second position to open the heat discharge opening in response to a first operation mode of the projector, the driving unit moving the door assembly along the first direction from the second position to the first position to close the heat discharge opening in response to a second operation mode of the projector.

Abstract: In an optical loading apparatus, by including a main roller installed at an inlet side of an optical disc drive; a disc guide installed in the opposite direction of the main roller with an inserted disc therebetween; a disc path control member which can change disc path; a small disc stopping member formed at the drive in order to make an inserted small disc stop at a position mountable onto a spindle; and a large disc stopping member formed at the drive in order to make an inserted large disc stop at a position mountable onto a spindle, it is possible to reduce a fabrication cost by reducing the number of parts by simplifying a structure, and accordingly different-sized optical discs can be reliably loaded.

Abstract: In an optical loading apparatus, by including a main roller installed at an inlet side of an optical disc drive; a disc guide installed in the opposite direction of the main roller with an inserted disc therebetween; a disc path control member which can change disc path; a small disc stopping member formed at the drive in order to make an inserted small disc stop at a position mountable onto a spindle; and a large disc stopping member formed at the drive in order to make an inserted large disc stop at a position mountable onto a spindle, it is possible to reduce a fabrication cost by reducing the number of parts by simplifying a structure, and accordingly different-sized optical discs can be reliably loaded.

Abstract: Disclosed is an optical disc cartridge comprising: a casing having a disc inserting/opening part for inserting and taking out a disc at an upper surface thereof and having an access hole to which an optical pickup accesses at a lower surface thereof; a pair of shutters mounted in the casing, for opening and closing the access hole and contact-supporting a disc at two points or at one point; a rotation wheel rotatably coupled to the shutters, for moving the shutters and placing an optical disc thereon; a wheel fixing/releasing means mounted at an inner side of the casing, for fixing or releasing the rotation wheel; and a disc fixing/releasing means movably mounted at the casing, for controlling a size of the disc inserting/opening part and thereby limiting an insertion/takeout of an optical disc into/from the disc inputting opening, and an apparatus of recording or reproducing data on or from an optical disc, comprising: a driving unit rotating an optical disc inserted in the optical disc cartridge; and a reco

Abstract: A disk cartridge and data recording/reproducing medium are disclosed The disk cartridge includes: a disk housing including a disk receiving unit for rotatably receiving a disk and an opening portion formed at a portion corresponding to a hub of the disk and formed where a pickup unit for recording/reproducing data to/from the disk while being rotationally moved on the disk moves; and a shutter for opening and shutting the opening portion.