Abstract: The present invention is related to a semiconductor memory device improving refresh performance by reliably generating an internal voltage. The internal voltage generator for use in the semiconductor memory device includes a cell plate voltage generator, a driving voltage generator, and a bit line precharge voltage generator. The bit line precharge voltage generator includes a half driving voltage generator for receiving the driving voltage to thereby generate the bit line precharge voltage, a second reference voltage generator for generating the second reference voltage, and a bit line precharge voltage releasing device for discharging a surplus voltage.

Abstract: The present invention is related to a semiconductor memory device improving refresh performance by reliably generating an internal voltage. The internal voltage generator for use in the semiconductor memory device includes a cell plate voltage generator, a driving voltage generator, and a bit line precharge voltage generator. The bit line precharge voltage generator includes a half driving voltage generator for receiving the driving voltage to thereby generate the bit line precharge voltage, a second reference voltage generator for generating the second reference voltage, and a bit line precharge voltage releasing device for discharging a surplus voltage.

Abstract: A method and developing apparatus are provided. The method and apparatus comprise a developing carrier, spaced apart from an image carrier at a predetermined interval, for developing an electrostatic latent image formed on the image carrier during rotation; and a rotational member, rotatably installed adjacent to the image carrier, for generating an air stream reverse to that generated by rotation of both the image carrier and the developer carrier, thereby inhibiting a developer from being scattered.

Abstract: A developing roller and a developing cartridge having the same include a conductive elastic body thicker at opposite ends of a developing roller shaft than at an axial center portion of the developing roller shaft such that print defects are prevented regardless of resilient deformation or thermal deformation of the conductive elastic body.

Abstract: Provided are a multi-pass image forming apparatus and an image forming method using the same. The multi-pass image forming apparatus includes a plurality of developers for forming a plurality of electrostatic latent images using toners having different polarities and colors in one development process and for forming a multi-color image in at least two development processes; an exposure unit for forming the plurality of the electrostatic latent images on a photosensitive medium; and an intermediate transferring unit for having a toner images transferred thereon from the photosensitive medium that overlap to form the multi-color image, wherein the toner image may overlap another toner image on the intermediate transferring unit.

Abstract: The present invention is related to a semiconductor memory device improving refresh performance by reliably generating an internal voltage. The internal voltage generator for use in the semiconductor memory device includes a cell plate voltage generator, a driving voltage generator, and a bit line precharge voltage generator. The bit line precharge voltage generator includes a half driving voltage generator for receiving the driving voltage to thereby generate the bit line precharge voltage, a second reference voltage generator for generating the second reference voltage, and a bit line precharge voltage releasing device for discharging a surplus voltage.

Abstract: A developer scattering prevention unit used with an electrophotographic image forming device includes an air inlet/outlet pipe installed adjacent to an intermediate area between an image carrier and a developer and having a first air inlet/outlet port opened toward the intermediate area, and at least one vacuum source installed on at least one of the image carrier and the developer carrier to communicate with the air inlet/outlet pipe to control air to flow from the intermediate area through the first air inlet/outlet port. A developing device having this developer scattering prevention function becomes simplified in structure.

Abstract: A developer scattering prevention unit used with an electrophotographic image forming device includes an air inlet/outlet pipe installed adjacent to an intermediate area between an image carrier and a developer and having a first air inlet/outlet port opened toward the intermediate area, and at least one vacuum source installed on at least one of the image carrier and the developer carrier to communicate with the air inlet/outlet pipe to control air to flow from the intermediate area through the first air inlet/outlet port. A developing device having this developer scattering prevention function becomes simplified in structure.

Abstract: A method and developing apparatus are provided. The method and apparatus comprise a developing carrier, spaced apart from an image carrier at a predetermined interval, for developing an electrostatic latent image formed on the image carrier during rotation; and a rotational member, rotatably installed adjacent to the image carrier, for generating an air stream reverse to that generated by rotation of both the image carrier and the developer carrier, thereby inhibiting a developer from being scattered.

Abstract: A roller spacing device roller mechanisms having rollers in close contact under a given pressure to separate first and second rollers by a constant distance to keep the rollers from touching when roller mechanisms are not used for a long period of time. The roller spacing device comprises a spacing member shiftably mounted between first and second positions on a shaft having a partial D-cut portion and associated with one of the roller members to be separated. The spacing member has a spacing nose overlapped in the second position with an outer circumferential surface of a driving gear connected to the other roller member to separate the first roller member from the second roller member by the constant distance; and a shifting unit shifting the spacing member between first and second positions on the shaft.

Abstract: A development device includes a developing gap detection function. The development device also includes an organic photoconductive body, a developer conveying body, a DC power supply, an AC power supply, a discharge start voltage detection portion, and a controller. The discharge start voltage detection portion detects a discharge start voltage occurring between the developer conveying body and the organic photoconductive body when a voltage is supplied from the power supply unit in increments at predetermined intervals. The controller obtains a developing gap between the organic photoconductive body and the developer conveying body based on the discharge start voltage detected by the discharge start voltage detection portion, and outputs a developing voltage suitable for the obtained developing gap.

Abstract: A paper sheet conveying apparatus and method for an image information processor in which a paper sheet with image information recorded thereon can be prevented from a skew carriage. The paper sheet conveying apparatus includes a driving motor which is controlled to be shifted from a forward revolution mode to a reverse revolution mode or vice versa. The paper conveying apparatus further includes a power cleaving means that selectively supplies the power to a first power transmitting system and to a second power transmitting system.

Abstract: In an alternator having a vacuum pump capable of improving a cooling characteristic, and having a rotary shaft supported by bearings installed in a rear bracket of the alternator, a housing of the vacuum pump has vanes and a rotation rotor is installed on the rotary shaft. A pump bracket is assembled to a lower portion of the housing and includes a packing inserted in an outer circumferential portion of a center shaft hole of the pump bracket for implementing a sealing operation in surface-contact with the rear bracket. A certain space is formed between the packing and the shaft hole for preventing a heat transfer, and a heat radiating unit is installed in a lower surface of the pump bracket.

Abstract: A development device includes a developing gap detection function. The development device also includes an organic photoconductive body, a developer conveying body, a DC power supply, an AC power supply, a discharge start voltage detection portion, and a controller. The discharge start voltage detection portion detects a discharge start voltage occurring between the developer conveying body and the organic photoconductive body when a voltage is supplied from the power supply unit in increments at predetermined intervals. The controller obtains a developing gap between the organic photoconductive body and the developer conveying body based on the discharge start voltage detected by the discharge start voltage detection portion, and outputs a developing voltage suitable for the obtained developing gap.

Abstract: A roller spacing device roller mechanisms having rollers in close contact under a given pressure to separate first and second rollers by a constant distance to keep the rollers from touching when roller mechanisms are not used for a long period of time. The roller spacing device comprises a spacing member shiftably mounted between first and second positions on a shaft having a partial D-cut portion and associated with one of the roller members to be separated. The spacing member has a spacing nose overlapped in the second position with an outer circumferential surface of a driving gear connected to the other roller member to separate the first roller member from the second roller member by the constant distance; and a shifting unit shifting the spacing member between first and second positions on the shaft.

Abstract: A sheet conveying apparatus for an image information processor includes a driving apparatus having a sheet supply opening and a sheet discharge opening arranged above and below and in the same direction, and a registration roller, a delivery roller, a scan roller, and a delivery roller arranged in order along a sheet conveying path formed in an opening curve of a substantially C-shape. The driving apparatus drives the rollers in mutual operations with selective combinations according to a sheet conveying process, and includes a driving motor controlled to change driving modes in the forward and reverse directions, and a power switching device for selectively transferring a rotational force to first and second power transmission systems according to the driving modes of the driving motor, whereby changes in sheet conveying speeds are controlled to secure reliability in the skew-feed correction of a sheet when supplying a large capacity of sheets at a high speed, and to adjust image resolution by mode.

Abstract: A paper sheet conveying apparatus and method for an image information processor in which a paper sheet with image information recorded thereon can be prevented from a skew carriage. The paper sheet conveying apparatus includes a driving motor which is controlled to be shifted from a forward revolution mode to a reverse revolution mode or vice versa. The paper conveying apparatus further includes a power cleaving means that selectively supplies the power to a first power transmitting system and to a second power transmitting system.

Abstract: A paper sheet conveying apparatus and method for an image information processor in which a paper sheet with image information recorded thereon can be prevented from a skew carriage. The paper sheet conveying apparatus includes a driving motor which is controlled to be shifted from a forward revolution mode to a reverse revolution mode or vice versa. The paper conveying apparatus further includes a power cleaving means that selectively supplies the power to a first power transmitting system and to a second power transmitting system.

Abstract: The present invention relates to an alternator having a vacuum pump capable of improving a cooling characteristic, and in particular to an alternator having a vacuum pump capable of improving a cooling characteristic which is capable of restraining a heat transfer to a bracket and brush of an alternator by effectively radiating a heat of a vacuum pump by providing a cooling unit which performs a heat sink function in a bracket installed in one side of a housing of a vacuum pump and capable of preventing a heat-degradation of oil supplied to the brush and into the vacuum pump in a vehicle vacuum pump which is installed in a portion of an alternator of a vehicle and which supports an operation of a brake, for thereby significantly enhancing a durability of the brush.

Abstract: A sheet conveying apparatus for an image information processor includes a driving apparatus having a sheet supply opening and a sheet discharge opening arranged above and below and in the same direction, and a registration roller, a delivery roller, a scan roller, and a delivery roller arranged in order along a sheet conveying path formed in an opening curve of a substantially C-shape. The driving apparatus drives the rollers in mutual operations with selective combinations according to a sheet conveying process, and includes a driving motor controlled to change driving modes in the forward and reverse directions, and a power switching device for selectively transferring a rotational force to first and second power transmission systems according to the driving modes of the driving motor, whereby changes in sheet conveying speeds are controlled to secure reliability in the skew-feed correction of a sheet when supplying a large capacity of sheets at a high speed, and to adjust image resolution by mode.