Abstract: An image forming apparatus includes: a pseudo-halftone processing unit that processes input image data to output image data of first resolution; a resolution converting unit that converts the image data of the first resolution into image data of second resolution that is higher than the first resolution; a modulation-signal generating unit that generates a modulation signal obtained by modulating the image data of the second resolution according to a clock signal; and a light-source driving unit that drives a light source according to the modulation signal. The pseudo-halftone processing unit converts a region of pixels having the same pixel value into a parallel line pattern that is formed with a plurality of parallel lines oblique relative to a direction of arrangement of pixels. The resolution converting unit generates the image data o in which each edge of the lines forming the parallel line pattern is smoothed.

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: According to one embodiment, a semiconductor device includes a circuit substrate, a semiconductor element, a sealing resin layer, and a conductive shielding layer. The circuit substrate includes an insulating layer, a plurality of interconnections forming first interconnection layers provided on an upper surface side of the insulating layer, a plurality of interconnections forming second interconnection layers provided on a lower surface side of the insulating layer, and a plurality of vias penetrating from the upper surface to the lower surface of the insulating layer. The semiconductor element is mounted on the upper surface side of the circuit substrate. The conductive shielding layer covers the sealing resin layer and part of an end portion of the circuit substrate. Any of the plurality of vias and the conductive shielding layer are electrically connected.

Abstract: An image forming apparatus is disclosed, including a light source; a drum; an optical scanning apparatus; and an endless belt. The image forming apparatus further includes a pattern forming unit which forms, on the endless belt along a conveying direction of the endless belt, a density fluctuation detecting pattern having a period; a density sensor which detects the density fluctuating detecting pattern and outputs a density signal including information on density fluctuations in the conveying direction of the endless belt; and a period detecting sensor which detects the period included in the density fluctuations.

Abstract: An image forming apparatus for forming an image in accordance with light to be emitted from a light source includes: a digital half-toning unit configured to convert a uniform-pixel-value region of image data to a parallel-line pattern formed with a plurality of parallel lines extending obliquely with respect to a direction, in which pixels are arrayed, thereby expressing each gray level of the image data as an area percentage; a modulated-signal generating unit configured to generate a modulated signal by modulating the converted image data with a clock signal; a light-source driving unit configured to drive the light source according to the modulated signal; and an edge control unit configured to narrow a to-be-illuminated region, which is to be illuminated by the light from the light source, in each of edge neighborhoods of the lines constituting the parallel-line pattern, while increasing intensity of the light.

Abstract: A light source drive circuit which drives a light source is disclosed, including a drive current generating unit which generates a drive current, the driving current including a predetermined current for obtaining a predetermined light amount from the light source; and first and second overshoot currents which are applied to the predetermined current in synchronization thereto; and a control unit which sets, to the drive current generating unit, a value of the first overshoot current to a fixed value, and a value of the second overshoot current in accordance with a light amount output from the light source.

Abstract: According to one embodiment, a semiconductor device includes a circuit substrate, a semiconductor element, a sealing resin layer, and a conductive shielding layer. The circuit substrate includes an insulating layer, a plurality of interconnections forming first interconnection layers provided on an upper surface side of the insulating layer, a plurality of interconnections forming second interconnection layers provided on a lower surface side of the insulating layer, and a plurality of vias penetrating from the upper surface to the lower surface of the insulating layer. The semiconductor element is mounted on the upper surface side of the circuit substrate. The conductive shielding layer covers the sealing resin layer and part of an end portion of the circuit substrate. Any of the plurality of vias and the conductive shielding layer are electrically connected.

Abstract: An image forming apparatus includes: a density detection unit that detects densities of an image developed by a developing unit at a plurality of positions in a main-scanning direction; a processing unit that obtains at least one of an amplitude and a phase of a first periodical density change of the image, of which cycle is a rotation cycle of a photosensitive drum, at the plurality of positions in the main-scanning direction on the basis of an output signal of the density detection unit, and corrects a drive signal for the light source so as to suppress the first periodical density change of the image at each position in the main-scanning direction on the basis of the rotation cycle of the photosensitive drum and at least one of the amplitude and the phase.

Abstract: A light source driver includes a controller which outputs an undershoot current in synchronization with lighting complete timing in lighting information, wherein the controller is configured to output the undershoot current such that a voltage in a light source when the output of the undershoot current is complete is equal to a voltage in the light source before being turned on.

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: An image forming apparatus includes: a pseudo-halftone processing unit that processes input image data to output image data of first resolution; a resolution converting unit that converts the image data of the first resolution into image data of second resolution that is higher than the first resolution; a modulation-signal generating unit that generates a modulation signal obtained by modulating the image data of the second resolution according to a clock signal; and a light-source driving unit that drives a light source according to the modulation signal. The pseudo-halftone processing unit converts a region of pixels having the same pixel value into a parallel line pattern that is formed with a plurality of parallel lines oblique relative to a direction of arrangement of pixels. The resolution converting unit generates the image data o in which each edge of the lines forming the parallel line pattern is smoothed.

Abstract: An image forming apparatus for forming an image in accordance with light to be emitted from a light source includes: a digital half-toning unit configured to convert a uniform-pixel-value region of image data to a parallel-line pattern formed with a plurality of parallel lines extending obliquely with respect to a direction, in which pixels are arrayed, thereby expressing each gray level of the image data as an area percentage; a modulated-signal generating unit configured to generate a modulated signal by modulating the converted image data with a clock signal; a light-source driving unit configured to drive the light source according to the modulated signal; and an edge control unit configured to narrow a to-be-illuminated region, which is to be illuminated by the light from the light source, in each of edge neighborhoods of the lines constituting the parallel-line pattern, while increasing intensity of the light.

Abstract: An image forming apparatus forms an image by irradiating light from a light source to an image carrier. The image forming apparatus includes: an image processing unit that processes image data at resolution N; and a control unit that generates modulation data to drive the light source at resolution m×N (m is a positive integer equal to or larger than 2), which is higher than the resolution N, based on the processed image data. Processing at the image processing unit is pseudo-halftone processing to perform line thinning or thickening on a part of the image data. The control unit converts the image data at the resolution N that has been subjected to the pseudo-halftone processing into data at the resolution m×N, and adjusts an amount of light for a part of the image data based on the resolution m×N.

Abstract: According to one embodiment, a semiconductor device includes a circuit substrate, a semiconductor element, a sealing resin layer, and a conductive shielding layer. The circuit substrate includes an insulating layer, a plurality of interconnections forming first interconnection layers provided on an upper surface side of the insulating layer, a plurality of interconnections forming second interconnection layers provided on a lower surface side of the insulating layer, and a plurality of vias penetrating from the upper surface to the lower surface of the insulating layer. The semiconductor element is mounted on the upper surface side of the circuit substrate. The conductive shielding layer covers the sealing resin layer and part of an end portion of the circuit substrate. Any of the plurality of vias and the conductive shielding layer are electrically connected.

Abstract: A vacuum processing apparatus includes a substrate holder which can tilt relative to a target and includes a refrigerating machine which cools a substrate, hoses which transport a refrigerant between a compressor provided outside a vacuum vessel and a cooling device inside the substrate holder, and a housing unit which is provided outside the vacuum vessel and houses the hoses in a coiled state with a curvature radius that does not exceed a predetermined curvature radius.

Abstract: According to one embodiment, a semiconductor device includes a circuit substrate, a semiconductor element, a sealing resin layer, and a conductive shielding layer. The circuit substrate includes an insulating layer, a plurality of interconnections forming first interconnection layers provided on an upper surface side of the insulating layer, a plurality of interconnections forming second interconnection layers provided on a lower surface side of the insulating layer, and a plurality of vias penetrating from the upper surface to the lower surface of the insulating layer. The semiconductor element is mounted on the upper surface side of the circuit substrate. The conductive shielding layer covers the sealing resin layer and part of an end portion of the circuit substrate. Any of the plurality of vias and the conductive shielding layer are electrically connected.

Abstract: A substrate holder apparatus includes a substrate holder configured to hold a substrate in a vacuum processing space in a chamber, a support column coupled to the substrate holder, a first rotating support unit which rotatably supports the support column, a second rotating support unit which rotatably supports the support column at a position spaced apart from a position where the first rotating support unit supports the support column, and a housing configured to support the first rotating support unit and the second rotating support unit. The second rotating support unit and the housing or the support column and the housing are electrically insulated from each other.

Abstract: A substrate holder apparatus includes a substrate holder configured to hold a substrate in a vacuum processing space in a chamber, a support column coupled to the substrate holder, a first rotating support unit which rotatably supports the support column, a second rotating support unit which rotatably supports the support column at a position spaced apart from a position where the first rotating support unit supports the support column, a housing configured to support the first rotating support unit and the rotating support unit, and a conductive member configured to electrically connect the support column to the housing.

Abstract: An image forming apparatus that forms an image according to light emitted from a light source is provided. The image forming apparatus includes: a first image processor that performs image processing on image data having a first resolution and outputs the resulting image data; a resolution converter that acquires the image data having the first resolution output from the first image processor and converts the image data to image data having a second resolution that is higher than the first resolution; a modulation signal generator that modulates the image data having the second resolution according to a clock signal to thereby generate a modulation signal; a light source driver that drives the light source according to the modulation signal; and a second image processor that performs image processing on the image data having the second resolution to be modulated to the modulation signal.

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.