Abstract: A light source driving device for driving plural light sources is provided. The light source driving device includes a voltage booster to boost a voltage from a power source to supply the boosted voltage to each of the plural light sources; a constant current driver to regularly hold driving current of each of the plural light sources constant; a load to consume substantially the same power as the plural light sources; and a switch to selectively connect either the load or the plural light sources with the voltage booster and the constant current driver so that the load or the plural light sources are interposed between the voltage booster and the constant current driver.

Abstract: A connection member that connects an electric substrate and a light source that emits a light beam, the connection member comprising: a light source terminal insertion portion into which a light source terminal of the light source is inserted from one end portion side and having another end portion side that penetrates the electric substrate.

Abstract: Disclosed is an optical writing device including a light-emitting element array unit having a light-emitting element array in which plural light-emitting elements are mounted on a substrate member in lines in a main scanning direction, an image focusing lens forming light from the light-emitting array into an image on a writing surface, and a housing holding the light-emitting element array and the image focusing lens; and a base member having plural of the light-emitting array units arranged and held thereon zigzag in the main scanning direction. Each of the plural light-emitting array units fixes its substrate member and housing at one position. Each of the plural light-emitting array units holds the housing on the base member at a position such that moving amount differences between the substrate member, the housing, and the base member due to their thermal expansions are cancelled at adjacent joints of the plural light-emitting array units.

Abstract: An illumination source senses a level of ambient light and determines an illumination waveform to be used to illuminate at least a portion of a document. The rise and the fall time of the illumination waveform are independently controlled.

Abstract: An illuminating device includes a light-emitting element that is mounted on a base material and a light-guiding member that guides light from the light-emitting element to an irradiation target, and illuminates the irradiation target with the light transmitted through the light-guiding member. The light-guiding member includes an extending portion that extends from the surface of the base material on which the light-emitting element is mounted to a left side end portion of the base material so as to cover the left side end portion. An image-reading includes this illuminating device. Image-forming apparatus includes this image-reading apparatus.

Abstract: A exposure head includes: a light-emitting element substrate including a first light-emitting element configured to emit light, a second light-emitting element disposed in a first direction of the first light-emitting element, a third light-emitting element, and a fourth light-emitting element disposed so as to satisfy the following relationship; Dr12:Dr23=1:m (l?m) where, l: positive integer number, m: positive integer number, Dr12: distance between the first light-emitting element and the third light-emitting element in the direction orthogonal to the first direction, Dr23: distance between the third light-emitting element and the fourth light-emitting element in the direction orthogonal to the first direction, and an imaging optical system configured to image lights emitted from the first light-emitting element, the second light-emitting element, the third light-emitting element, and the fourth light-emitting element.

Abstract: A self-scanning light source head comprising: a substrate, surface emitting semiconductor lasers arranged in an array on the substrate, and at least one thyristor disposed on the substrate and serving as a switching element selectively turning ON and OFF light emission of the surface emitting semiconductor lasers, and an image forming apparatus using the same are provided.

Abstract: A lens integrated light emitting diode array, a line printer head using the light emitting diode array, and a method of manufacturing the light emitting diode array. The light emitting diode array includes a plurality of light emitting diodes formed on a surface of a transparent substrate and a plurality of lenses formed on another surface opposite to the surface of the transparent substrate, wherein the plurality of light emitting diodes are divided into a plurality of groups to be arranged to respectively correspond to the plurality of lenses.

Abstract: An optical scanning device includes a plurality of light sources, at least two securing units provided for each of the light sources, and a substrate for driving the light sources. The components are arranged such that the direction “A” in which the light sources are arranged has an upward slant with respect to a lateral direction (i.e. X direction) of the substrate, and the direction “B” in which the at least two securing units provided for each of the light sources are arranged has a downward slant with respect to the lateral direction of the substrate. Accordingly, a compact optical scanning device can be provided.

Abstract: A line head, includes: a microlens array in which a plurality of microlenses having a magnification whose absolute value is below 1 are arranged in a main scanning direction of a surface-to-be-scanned, and a plurality of luminous element groups which are arranged in a one-to-one correspondence with the respective plurality of microlenses, wherein in each of the plurality of luminous element groups, a plurality of luminous elements are arranged at mutually different main-scanning-direction positions in the main scanning direction, the plurality of luminous elements are respectively caused to emit lights at timings in conformity with a movement of the surface-to-be-scanned in a sub scanning direction, and light beams emitted from the plurality of luminous elements are imaged on the surface-to-be-scanned at mutually different main-scanning-direction positions in the main scanning direction to form a plurality of spots side by side on the surface-to-be-scanned in the main scanning direction, and in each of the pl

Abstract: Provided is a process for producing a surface emitting laser including a surface relief structure provided on laminated semiconductor layers, including the steps of transferring, to a first dielectric film, a first pattern for defining a mesa structure and a second pattern for defining the surface relief structure in the same process; and forming a second dielectric film on the first dielectric film and a surface of the laminated semiconductor layers to which the first pattern and the second pattern have been transferred. Accordingly, a center position of the surface relief structure can be aligned with a center position of a current confinement structure at high precision.

Abstract: An imaging lens assembly includes a mount which comprises a mount adhering portion on which a light curable adhesive is applied, an imaging lens which comprises a lens portion, and a supporting portion to extend from the lens portion, and a holder coupled to the mount adhering portion by the light curable adhesive, and to support the supporting portion.

Abstract: Light sources emit light beams onto deflecting surfaces of a deflecting unit through incident optical systems. The deflecting unit deflects the light beams in a uniform direction to form images onto different surfaces to be scanned through imaging optical systems. An optical path length, or a distance from a deflection point of the deflecting unit to a surface to be scanned, of an imaging optical system to form an image onto a surface to be scanned closest to the deflecting unit is different from that of an imaging optical system to form an image onto a surface to be scanned farthest from the deflecting unit. Also, the following condition is satisfied: 0.85<K1/K2<0.98 where K1 is a K? coefficient of an imaging optical system with a short optical path length, and K2 is that of an imaging optical system with a long optical path length.

Abstract: An exposure head includes first and second light-emitting element rows formed by disposing light-emitting elements in a first direction on a light-transmitting substrate. A first photosensor is disposed at a first side in a second direction perpendicular to the first direction on the light-transmitting substrate to receive light emitted from the light-emitting elements of the first and second light-emitting element rows. A second photosensor is disposed in the second direction at a second side opposite to the first side on the light-transmitting substrate to receive light emitted from the light-emitting elements of the first and second light-emitting element rows. An image-forming optical system forms an image with light emitted from the light-emitting elements.

Abstract: A lens array, includes: a plurality of lens substrates which include a plurality of lenses arranged in a first direction; and a support member which supports the plurality of lens substrates arranged in the first direction.

Abstract: A light source apparatus includes a circuit board on which a light source unit including a vertical-cavity surface-emitting light source and a package that houses the vertical-cavity surface-emitting light source is mounted, an optical element holder that holds a plurality of optical elements including at least a coupling lens, and an intermediate holder that is arranged between the circuit board and the optical element holder. The intermediate holder is joined to the circuit board to cover an area of the circuit board on which the light source unit is mounted to thereby make contact with the package such that the vertical-cavity surface-emitting light source is positioned and fixed and joined to the optical element holder to thereby position the optical elements to the vertical-cavity surface-emitting light source.

Abstract: A light-collective member (142) for collecting a light outputted from a light source (140), which irradiates a light toward a document surface, toward a sub-scanning direction is provided in front of the light source (140). An illuminating portion which is so formed that each of opposite end surfaces (170, 172) in the main scanning direction of the light-collective member (142) has an obtuse angle with respect to a bottom surface (174) facing the light source (140).

Abstract: An exposure head includes: a group of light emitting elements in which light emitting elements are arranged in a first direction; a light emitting element substrate in which the group of light emitting elements is arranged in the first direction and in a second direction orthogonal or substantially orthogonal to the first direction; and a driving substrate which drives the light emitting elements arranged on the light emitting element substrate, wherein the driving substrate controls a light emission intensity of a light emitting element that is near to an end side in the first direction of the group of the light emitting elements, among the light emitting elements constituting the group of the light emitting elements, so that the intensity is smaller than the light emission intensity of a light emitting element constituting the group of the light emitting elements different from the above light emitting element, and the light emission intensity becomes smaller towards the end side.

Abstract: Provided is a line head including: a light emitting device array in which N (N is an integer of 2 or more) light emitting device groups including a plurality of light emitting devices is arranged; an output unit which sequentially outputs driving signals for driving the light emitting devices of the light emitting device groups to the light emitting device groups; and a delay unit which delays input timings when the driving signals output from the output unit are input to the light emitting devices, wherein the delay unit delays the input timings of the 1 to (N?1)th driving signals output from the output unit to the input timings of the Nth driving signals output from the output unit, and allows the light emitting devices of the different light emitting device groups simultaneously to emit light.

Abstract: An embodiment of the present invention provides an illuminating device that is disposed in an image-reading apparatus and image-forming equipment, comprising: a light-source portion on one side; a light-source portion on the other side; and a long translucent light-guiding member having a light-discharging face long in a longitudinal direction thereof, and guiding light derived from the one light-source portion from one end face in the longitudinal direction, and light derived from the other light-source portion from the other end face in the longitudinal direction so that the guided light is irradiated to an object through the long light-discharging face; wherein the one and the other light-source portions are arranged such that positions of optical axes thereof differ from each other.

Abstract: A light emitting element array includes a plurality of light emitting elements each having a first terminal, a second terminal, and a third terminal. The light emitting elements are arranged next to each other to form a group. The first terminal receives a drive signal, the second terminal is connected to ground, and the third terminal has a threshold voltage or a threshold current controllable from outside so that the light emitting elements are driven in a time division way.

Abstract: An image forming apparatus wherein a photosensitive drum is located such that its circumferential surface is exposed to light at a position between an image surface of light that is emitted from an LED at a distance of a half of a pitch of a plurality of rod lenses from a first rod lens of the plurality of rod lenses and that passes through the first rod lens and an image surface of light that is emitted from an LED at a distance of the pitch of the plurality of rod lenses from a second rod lens of the plurality of rod lenses and that passes through the second rod lens.

Abstract: A light source device includes a light source that includes a plurality of light emitting units, a drive circuit that drives the light source, and a circuit board on which the light source is mounted in a first area and the drive circuit is mounted in a second area and which includes a radiation mechanism between the first area and the second area for heat from the drive circuit.

Abstract: The invention relates to an optical printer head 12 provided with one or a plurality of light emitting element array units 3. The light emitting element array unit 3 is provided with a circuit board 30, a base member 33 supporting the circuit board 30, and a plurality of light emitting elements mounted onto the base member 33 and arranged in a row in main scanning directions M1 and M2. The base member 33 has a lower hygroscopic rate than the circuit board 30. The plurality of light emitting element array units 3 are arranged along the main scanning directions M1 and M2, for example, so that end portions 34 in adjacent light emitting element array units 3 are overlapped with each other in vertical-scanning directions S1 and S2.

Abstract: An electro-optical device includes a light source array having a plurality of light-emitting devices arranged on a substrate in a direction, a lens array having a plurality of lens elements arranged in the direction, each lens element forming an image on an image carrier using light from the light-emitting element, and a first light transmissible member and a second light transmissible member disposed between the light source array and the lens array so as to be in contact with the light source array and the lens array, in which the first light transmissible member and the second light transmissible member are arranged in continued manner in the direction, and wherein the first light transmissible member and the second light transmissible member are different in any one or more characteristics of refractive index, elastic modulus and light transmittance.

Abstract: An exposure head includes a substrate through which light from light-emitting elements provided on a first surface of the substrate penetrates from the first surface to a second surface. A rod lens array is provided on the second surface of the substrate to image the light from the second surface. A light transparent member is provided between the substrate and the rod lens array and fixed to the second surface of the substrate and the rod lens array. A support member supports the first surface of the substrate.

Abstract: A line head includes: a support member; a light emitting substrate unit having a first substrate supported by the support member and a plurality of light emitting elements arranged in a first direction of the first substrate; a circuit board unit having a second substrate and at least one interface circuit, which is provided to the second substrate, and to which at least one signal for driving the light emitting elements is input; and a flexible printed circuit board having a wiring pattern adapted to electrically connect the light emitting substrate unit and the circuit board unit to each other, wherein the flexible printed circuit board is disposed so as to be connected at an end of the second substrate in a second direction one of perpendicular and substantially perpendicular to the first direction, and is folded back from one end to the other end.

Abstract: The light-emitting element chip includes: a substrate; a light-emitting portion including plural light-emitting elements each having a first semiconductor layer that has a first conductivity type and that is stacked on the substrate, a second semiconductor layer that has a second conductivity type and that is stacked on the first semiconductor layer, the second conductivity type being a conductivity type different from the first conductivity type, a third semiconductor layer that has the first conductivity type and that is stacked on the second semiconductor layer, and a fourth semiconductor layer that has the second conductivity type and that is stacked on the third semiconductor layer; and a controller including a logical operation element that performs logical operation for causing the plural light-emitting elements to perform a light-emitting operation, the logical operation element being formed by combining some sequential layers of the first, second, third and fourth semiconductor layers.

Abstract: A semiconductor integrated circuit device controlling a first light amount of light emitted from a light source based on a second light amount of light entering a light amount detection part so that the first light amount becomes a target level is disclosed. The semiconductor integrated circuit device includes a comparison part configured to compare a voltage corresponding to the second light amount and a reference voltage corresponding to the target level; and a drive current control part configured to control a drive current supplied to the light source based on the result of the comparison by the comparison part. The drive current control part includes a return light identification part configured to determine whether the second light amount includes a third light amount of return light occurring discontinuously.

Abstract: A multilayered electrophotographic photoreceptor comprising at least a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material in this order, on a conductive support, wherein the charge transport layer contains, as the charge transport material, an amine type compound represented by the following formula (I): wherein R1 to R9, which may be the same or different, respectively represent a hydrogen atom; a halogen atom; or an alkyl, cycloalkyl, alkenyl or alkoxy group which may have a substituent, provided that either one of R2 and R3 represents —N(Ar1)(Ar2); and Ar1 to Ar4, which may be the same or different, respectively represent an aromatic hydrocarbon residue or an aromatic heterocyclic residue which may have a substituent, and Ar1 and Ar2, or Ar3 and Ar4 may be combined with each other to form a condensed ring; and has photosensitive properties in coherent light of wavelength range from 400 to 450 nm.

Abstract: Techniques are disclosed that enable fine features such as serifs and narrow strokes of texts to be produced by xerographic devices, for example. The fine features may be generated by subpixels which are produced when a pulse width used to image a pixel is shorter than a corresponding physical size of a laser beam spot used to write the image on a Xerographic photoreceptor. The laser driver may be modified to drive a light emitting element with a boost current profile that includes an overshoot above a steady state current at a rising edge. The overshoot results in a light intensity time profile that has an increased area for a subpixel.

Abstract: A writing device to write an image onto a photoconductor, including a print head having plural LEDs, a first supporting member, having a position determining section to determine the position of the print head, and an adjustment screw, and a second supporting member, having a reference shaft which comes into contact with the first supporting member and movably supports the first supporting member while moving to or separating from the photoconductor, and a pressuring member which presses the first supporting member against the reference shaft, wherein the second supporting member is engaged with the first supporting member by the adjustment screw, whereby when the adjustment screw is rotated, the print head is shifted along with the first supporting member, and a first direction joining the position determining section and the adjustment screw makes a right angle with a second direction joining the adjustment screw and the reference shaft.

Abstract: The present invention relates to a printing apparatus. The printing apparatus includes a plurality of rollers, a micro light source set, an optical photoconductive drum, an imaging lens assembly, and a print unit. The micro light source set includes multiple micro light sources arranged in a row for producing multiple respective light beams. The imaging lens assembly is disposed between the micro light source set and the optical photoconductive drum for allowing the multiple light beams to pass through so as to image on the optical photoconductive drum.

Abstract: A reading apparatus comprising a plate on which a transparent original is placed, and a guide unit for setting the transparent original at a predetermined position on the original plate. A light source unit is settable at plural positions in contact with the guide unit for illuminating the transparent original which is urged against the original plate by the light source unit. A portion of the light source unit which is contacted with the transparent original is chamfered (R-worked) not to damage the transparent original. Further, a portion of the light source unit which is contacted with the transparent original is designed to urge the transparent original at an out of an image area of the original.

Abstract: To provide an image forming apparatus which is able to improve image quality while suppressing soiling of image white parts, scattering in the apparatus, streaks, fading, etc. due to non-uniformity in the particle size distribution of a toner or mismatching between a toner and a photoreceptor, and which has good cleaning properties, and even when a high speed printing machine is used, is able to reduce a problem of soiling, etc. in long-term use and provide excellent image stability.

Abstract: An image forming apparatus is provided. The image forming apparatus includes: plural photosensitive members; plural exposing units opposed to the photosensitive members, respectively, each of the exposing units including a plurality of light emitting elements arranged in a first direction; and a body frame which is provided at both sides of the exposing units in the first direction. Each of the exposing units includes: a gap maintaining member which abuts a respective one of the photosensitive members to define a distance between the exposing unit and the photosensitive member; a first-direction positioning portion which abuts the body frame in the first direction to position the exposing unit in the first direction; and a second-direction positioning portion which abuts the body frame in a second direction perpendicular to the first direction and an exposing direction of the light emitting elements, to position the exposing unit in the second direction.

Abstract: An objective is to provide an organic photoreceptor exhibiting high sensitivity, suitable for exposure to a semiconductor laser having an emission wavelength of 350-500 nm or a light emitting diode, with which generation of memory images as well as image defects caused by very small charge leakage is inhibited, and also to provide an image forming apparatus fitted with the organic photoreceptor. Also disclosed is an organic photoreceptor possessing a charge generation layer and a charge transport layer provided on a conductive support, wherein the charge generation layer contains particles made of a condensed polycyclic pigment, having an average major axis length of 500 nm or less, an average aspect ratio of 2.5-5.0, and an aspect ratio variation coefficient of 16% or less.

Abstract: An illumination device for a reading device which irradiates light over a predetermined illumination width including a reading area having a predetermined reading width extending in a main scanning direction of a document and reads the light reflected from the document using a reading element has a point light source, and a light-guiding member having an incident surface opposed to a light-emitting surface of the point light source and a light-emitting surface opposed to the reading area. An illumination area generated by the light has a high distribution range of a substantially constant illuminance, and the high distribution range coincides substantially with the reading area.

Abstract: In a document lighting device, each of the plurality of the light emitting elements arrayed in a light source unit is arranged in a vicinity of a focal point on a cross section in a sub-scanning direction of a long-sized lens, and a convergent point is placed at a location departing a predetermined distance in the main scanning direction from a location on the surface to be illuminated included in the sub-scanning cross section.

Abstract: An exposure head includes a substrate having a plurality of light emitting element rows each having a plurality of light emitting elements arranged in a first direction, the light emitting element rows being arranged in a second direction perpendicular or substantially perpendicular to the first direction, and an imaging optical system adapted to image light beams from the light emitting elements on an exposed surface to form respective light-collected sections, and two of the light emitting elements forming the light-collected sections adjacent to each other in the first direction are respectively disposed in the light emitting element rows different from each other, and one of the light emitting element rows is disposed so as to match or substantially match with the meridian plane of the imaging optical system.

Abstract: An exposure head includes an imaging optical system arranged in a first direction, and first and second light emitting elements disposed in a second direction substantially perpendicular to the first direction that emit light beams to be imaged by the imaging optical system to form light-collected sections adjacent to each other in the first direction. A first wiring is electrically connected to and extended out from the first light emitting element to one side in the second direction. A second wiring is electrically connected to and extended out from the second light emitting element to the one side in the second direction.

Abstract: Disclosed is a production apparatus of a wired member, including: a mask forming unit that forms a mask on a transfer substrate by using a toner in accordance with an electrophotographic method so as to be transferable to a member to be wired, the mask corresponding to a wiring pattern to be formed on the member to be wired; a mask transferring unit that transfers the mask formed on the transfer substrate by the toner to the member to be wired; a conductive film forming unit that supplies a conductive material onto the mask-transferred side of the member to be wired to form a film of the conductive material thereon; and a mask removing unit that removes the mask from the member to be wired on which the film of the conductive material has been formed.

Abstract: Provided is an image forming apparatus including: a photoconductor; a light including main exposure devices and redundant exposure devices; a beam scanning unit arranging main laser beam spots such that the they are separated by an image-forming unit distance, arranging redundant laser beam spots such that they are separated by the image-forming unit distance subsequently to the main laser beam spots, and simultaneously scan the main and redundant laser beam spots in the main scanning direction; and a device selection unit selecting exposure devices used in one-time scanning from the main and redundant exposure devices, wherein, when an image continuous in the sub scanning direction are exposed, the device selection unit selects the exposure devices such that the number of pairs of pixels which are adjacent and exposed by different scannings is equalized without depending on writing start positions of the image in the sub scanning direction.

Abstract: An image forming apparatus, includes: an exposure head that includes a plurality of imaging optical systems which are arranged in a first direction and a plurality of light emitting elements which emit lights to be imaged by the imaging optical systems; a latent image carrier that moves in a second direction orthogonal to or substantially orthogonal to the first direction and carries a latent image formed by the exposure head; a developer that develops the latent image; and a detector that detects an image developed by the developer, wherein the image detected by the detector has a width in the first direction wider than that of an image formed by one imaging optical system.

Abstract: An image forming apparatus is capable of printing half-toned images of high quality. The image forming apparatus includes a photoconductive body and a light emitting element array. A plurality of light emitting elements is aligned in the light emitting element array. Each light emitting element array emits light to form an electrostatic latent image of a pixel on the photoconductive drum. A controller controllably drives the plurality of light emitting elements to form the electrostatic latent image, each pixel being formed by a combination of a total of N (N>1) light emitting elements. Each element of the N light emitting elements is driven with a different amount of energy from remainders of the N light emitting elements.

Abstract: A light source unit is provided, which includes a light source with a plurality of light emission portions two-dimensionally arranged; a substrate on which the light source is mounted; a first support portion supporting the substrate; a bias member biasing the substrate towards the first support portion; a coupling element coupling a light beam emitted from the light source; a second support portion supporting the coupling element; a holding member holding a position of the substrate relative to the first support portion, a fitting portion provided in each of the first and second support portions to rotatably fit the first and second support portions into each other around an optical axis of the light source; and a fastening member integrally fastening the first and second support portions.

Abstract: An image forming device includes a photoconductor drum having a rotational shaft in a first direction, and an exposure head having a plurality of imaging optical systems disposed in the first direction and a second direction and each having a negative optical magnification, and a light emitting element substrate on which a plurality of light emitting elements are disposed, the plurality of light emitting elements emitting light beams imaged on the photoconductor drum by one of the imaging optical systems, and the light beams are imaged by the imaging optical systems disposed in the second direction on the photoconductive drum at positions different from each other in the second direction.

Abstract: A light exposure head includes a base; a substrate disposed on the base, the substrate having a plurality of light emitting elements disposed thereon; and n (n is an integer greater than or equal to one) imaging optical systems, each of which having a negative optical magnification, the imaging optical systems focusing light beams emitted from the plurality of light emitting elements disposed on the substrate.

Abstract: A multi-functional device comprising an image forming apparatus to form a printing image and a scanner module to scan an image in a main scanning direction. The scanner module includes an illuminator to illuminate a light to a document mount, a sensor unit to read an image information of an object placed on the document mount, and an imaging lens which is disposed between the document mount and the sensor unit and focuses the light reflected from the object onto the sensor unit. The illuminator includes a light source to emit light, a light guiding unit which is lengthened in a sub-scanning direction, faces the document mount and changes a traveling path of the light emitted from the light source to illuminate the document mount, and a guide holder which comprises an installation part where the light guiding unit is installed, and a mounting part where the light source holder is mounted to provide the light source at least one side of the light guiding unit.

Abstract: A plurality of photo emitters are arrayed on a transparent substrate in a first direction to form at least one photo emitter array. An electrode is provided on the substrate and electrically connected to the photo emitters in common. A dimension of the electrode in a second direction perpendicular to the first direction is smaller than a dimension of the substrate in the second direction.