Abstract: Apparatus that forms an image according to image information includes density sensors that detect image density variations in main and sub-scanning directions. A processing device generates correction data for correcting a light source output to suppress the density variations based on detection results. The processing device modifies the correction data such that the light source output after the correction is at least a minimum rated output at a position at which the output after the correction is lower than the minimum rated output, in the relation between a position on the surface of the photosensitive element in the main-scanning direction and the output after the correction, and modifies the correction data such that the light source output after the correction is at most a maximum rated output at a position at which the output after the correction is higher than the maximum rated output.

Abstract: An image forming apparatus that forms an image includes: a photosensitive element; an optical scanning device that includes a light source, and scans a surface of the photosensitive element in a main scanning direction with light emitted from the light source to form a latent image; a developing unit that develops the latent image; a photosensitive element period detecting sensor that detects a rotation period of the photosensitive element; a density sensor that detects a density variation of an image developed by the developing unit, in a sub scanning direction; and a processing device that corrects a driving signal of the light source according to the image information, based on an output signal of the density sensor and an output signal of the photosensitive element period detecting sensor.

Abstract: An optical scanning device includes n-odd (n?2) light sources disposed at different positions at least in a sub-scanning direction, a pixel forming part in which one pixel is depicted by light beams emitted from m-odd (n?m?2) light sources of the n-odd light sources and a distance of adjacent light sources for emitting the light beams in the sub-scanning direction is less than 5 ?m, and a light source driving control part configured to control an emitting state of the light sources for depicting the one pixel and conduct an emission driving control for moving a gravity center of the one pixel in the sub-scanning direction.

Abstract: A laser driving device in the embodiment includes: a laser light source that emits laser light; a light source drive control unit that adjusts a light amount of laser light emitted from the laser light source constant and controls on-off driving of the laser light source; a light amount adjustment element that is disposed in an optical path of laser light emitted from the laser light source and is capable of electrically changing transmittance or reflectance of the laser light that is entered thereinto; and a peak light amount control unit that controls the transmittance or the reflectance of the light amount adjustment element, so as to adjust a peak light amount of the laser light that is output from the light amount adjustment element after having traveled through or having been reflected by the light amount adjustment element.

Abstract: An apparatus for rotating a substrate having a center hole, comprises a pickup member configured to hold the substrate by holding an edge of the center hole, and a driving unit configured to drive the pickup member, wherein the driving unit is configured to insert the pickup member into the center hole so as not to bring the pickup member into contact with the substrate, to drive the pickup member upward so that the pickup member holds the edge of the center hole from below, and thereupon to rotate the pickup member so as to rotate the substrate, and in rotating the substrate, the driving unit rotates the pickup member about a rotation axis which is perpendicular to a principal surface of the substrate and passes through the center of the substrate.

Abstract: A portable information device includes first and second enclosures and a hinge portion connecting those enclosures. The first enclosure has: an antenna; a plurality of active circuits for predetermined frequency bands; a first circuit that demultiplexes reception signals into input signals with the predetermined frequency bands to output the input signals to the active circuits and multiplexes output signals with the predetermined frequency bands to output the multiplexed output signals as transmission signals to the antenna; and a second circuit that multiplexes the input signals and demultiplexes transmission signals into the output signals to output the output signals to the active circuits.

Abstract: A laser driving unit drives a semiconductor laser apparatus including a plurality of light sources, includes a light detecting part to detect light emissions from the light sources, a driving current generator to generate a driving current based on an input signal, an auxiliary driving current generator to generate an auxiliary driving current in an initial time period of an ON-time of the driving current, and an auxiliary current set part to set an auxiliary amount of the auxiliary driving current to be added to the driving current, for each of the light sources, based on a difference between the light emissions detected by the light detecting part and a target light emission of the light sources.

Abstract: A pixel clock generator that generates a pixel clock to regulate a drive timing of a scanning light source includes a data generating circuit that generates phase data based on a phase data pattern to correct an uneven scanning speed and fluctuation of scanning widths, and a pixel clock generating circuit generates a pixel clock having a long cycle based on a high-frequency clock and that performs a phase shift for the pixel clock based on the high-frequency clock. The phase pattern is set-such that difference in an amount of the phase shift between the pixel clocks adjacent to each other does not exceed a basic amount of the phase shift of the pixel clock generating circuit.

Abstract: A laser driving device that drives a semiconductor laser based on a light-emitting signal includes an expansion circuit that expands a pulse width of the light-emitting signal based on a known difference between the pulse width of the light-emitting signal and a lighting pulse width of the semiconductor laser when the semiconductor laser emits light according to the light-emitting signal, and a driver that outputs a driving signal to the semiconductor laser according to an output signal of the expansion circuit.

Abstract: A light-source drive control unit divides each pixel of the image data into a plurality of subpixels, deletes certain subpixels from the image data in accordance with predetermined correction data, shifts remaining subpixels in the sub-scanning direction thereby obtaining reduced image data, and controls a plurality of light sources based on the reduced image data in such a manner that one line of the subpixels is formed with a light beam emitted from a corresponding one of the light sources.

Abstract: A pixel clock and pulse-modulation-signal generating device includes a high-frequency-clock generating unit that generates a high-frequency clock; a modulation-data generating unit that generates, based on pixel control data that specifies a pixel length and image data, phase data that indicates a transition timing of a pixel clock and modulation data that indicates a desired bit pattern that corresponds to the image data; a pixel-clock generating unit that generates a pixel clock based on the high-frequency clock, the phase data, and a horizontal synchronization signal; and a serial-modulation-signal generating unit that inputs the modulation data, and outputs a pulse modulation signal in a serial pulse string based on the high-frequency clock.

Abstract: An optical scanning apparatus that includes a light source unit having plural main light sources that are two-dimensionally arranged in the main scanning direction and the sub scanning direction, and plural sub light sources that are arranged between rows of the main light sources aligned in the main scanning direction. The optical scanning apparatus also includes an optical system configured to scan light emitted from the light source unit on a scanning object to form an image on the scanning object, and a control apparatus configured to adjust a main scanning direction image position by controlling two of the main light sources that are juxtaposed to each other with respect to the main scanning direction and adjust a sub scanning direction image position by controlling a main light source and a sub light source that are adjacent to each other.

Abstract: An image forming apparatus includes an optical scanning device that scans a scan area on an image carrier with light flux containing image information and writes the image information onto an image area in the scan area. In the optical scanning device, a first light receiving unit receives light flux emitted from a light source and reflected by a reflecting optical unit; a second light receiving unit receives light flux that passes through an aperture of the reflecting optical unit, is deflected by a deflecting unit, and heads for outside the image area within the scan area; and a control unit controls a drive signal of the light source based on signals output from the first and second light receiving units.

Abstract: An optical scanning device of the invention includes: n-odd (n?2) light sources disposed at different positions at least in a sub scanning direction; a light source driving control part configured to control a light emitting state of the light source; and a sub-scanning pixel position detecting part configured to depict one pixel with m-odd (n?m?2) light sources of the n-odd (n?2) light sources and to detect a deviation in position of the one pixel in a sub scanning direction, wherein the light source driving control part is configured to correct the deviation in position of the one pixel in the sub scanning direction at a resolution equal to or higher than a density of the pixel, depicted with the m-odd light sources, by controlling the light emitting state of the m-odd light sources on the basis of a result of detection with the sub-scanning pixel position detecting part.

Abstract: There provided is a semiconductor laser control device which including plural light sources that are configured with eight or more semiconductor laser elements, a one detecting section that detects a light power of the light sources, a light power control unit that compares a signal according to a light power detected by the detecting section with a control signal corresponding to a predetermined light power to control a current supplied to the light sources, and a voltage clamp circuit that functions as an overvoltage preventing means for the detecting section when turning on each of the light sources to perform light power control.

Abstract: An optical scanning device which scans a scanned surface by a plurality of light beams in a main-scanning direction includes a light source having a plurality of light-emitting portions which emit the light beams, the light-emitting portions being two-dimensionally arranged in a plane parallel to the main-scanning direction and a sub-scanning direction orthogonal to the main-scanning direction via arrangement intervals in the main-scanning direction and the sub-scanning direction, a deflector which scans the light beams in the main-scanning direction; and a scanning optical system which images the scanned light beams onto the scanned surface.

Abstract: In a pixel clock creation method and device, a high frequency clock is created. A scanning time needed to scan a predetermined scanning length is detected in accuracy of half a period of the high frequency clock to output a detection value indicating the detected scanning time. The detection value and a predetermined target value are compared to output a comparison result. A phase data is created based on the comparison result. A pixel clock whose phase is controlled based on both the high frequency clock and the phase data is created.

Abstract: A light scanning apparatus is provided that has plural light sources which scan plural light beams in a main scanning direction. The light scanning apparatus comprises a light source control unit that controls the plural light sources. Where an array of N (N?2) light sources aligned in a sub scanning direction and capable of scanning different positions in the sub scanning direction is called a virtual light source array, and where L (L?2) virtual light source arrays aligned in the sub scanning direction are formed, the light source control unit causes M ((N?1)?M?1) light sources out of the N light sources of each of the L virtual light source arrays to emit light to form a pixel and thereby to form a total of L pixels aligned in the sub scanning direction by giving the same data to the M light sources of each of the L virtual light source arrays.

Abstract: A substrate support apparatus which inserts a substrate holding portion into a center hole formed in a substrate, and supports the substrate in a vertical orientation by the substrate holding portion, comprises a first connecting plate connected to the substrate holding portion, a second connecting plate which faces the first connecting plate and is connected to a transport robot that transports the substrate to a substrate holder, at least three linear support members configured to connect the first connecting plate to the second connecting plate, and an elastic shock absorbing member inserted between the first connecting plate and the second connecting plate.

Abstract: In a light-source driving device, a high-frequency clock generating circuit generates two high-frequency clock signals having mutually different phases, an image-data creating circuit creates a plurality of image data corresponding to a plurality of light-emitting units according to image information, and a write control circuit creates a plurality of modulated data corresponding to the light-emitting units from the plurality of image data and separately controls output timings of the plurality of modulated data by using a time, as a unit, corresponding to a phase difference between the two high-frequency clock signals. The write control circuit includes two data switching circuits that set a correspondence relation between image data and PWM data based on one of a relation between an array of the light-emitting units and an array of a plurality of light spots and a relation between a surface to be scanned and a main scanning direction.