Abstract: An image forming apparatus includes an exposing unit, an intermediary transfer belt, a cleaning blade to clean a remaining toner on the intermediary transfer belt, and a controller to control so as to form a toner image on the intermediary transfer belt to supply toner as a lubricant of the cleaning blade. The controller controls a first line count when a first toner image is formed to supply the toner to the cleaning blade to become fewer than a second line count when a second toner image is formed to transfer to a recording material.
Abstract: An image forming apparatus includes a developing roller, a photoconductor drum, a density detector, a current detector, and a controller. The developing roller carries a toner. The photoconductor drum carries a toner patch. The density detector detects toner density of the toner patch. The current detector detects developing current flowing to the toner patch. The controller calculates an inclination of an approximate straight line approximating a relation between the toner density and the developing current. The developing roller develops three or more toner patches, different in toner density and different in developing current from one another, on the photoconductor drum. The controller calculates the inclination, using different mathematical expressions depending on whether three toner patches or four toner patches are provided.
Abstract: A focus adjustment method is disclosed. The focus adjustment method includes depositing, using a print apparatus, print agent onto a printable substrate, the print apparatus comprising a photoconductive surface and a writing head having a first end and a second end, the writing head having an array of light sources to emit radiation onto the photoconductive surface during a printing operation. The method also includes during said depositing, moving the writing head relative to the photoconductive surface, between a first position and a second position, to create a printed image. The method also includes determining, based on the printed image, for each of a plurality of locations along the writing head, a position of the writing head relative to the photoconductive surface at which the writing head is most focussed.
May 31, 2019
Date of Patent:
September 6, 2022
Hewlett-Packard Development Company, L.P.
Abstract: An image forming apparatus superimposes a plurality of color images each formed of a single-color developer to form a superimposed color image. The image forming apparatus includes a transfer belt and processing circuitry. The processing circuitry forms, as a correction pattern, combination patterns arranged along a conveyance direction of the color images and including a first pattern, a second pattern, and a third pattern. A formation interval of the first pattern constituting one combination pattern is shorter than a formation interval between one horizontal line of the first pattern constituting the one combination pattern and another horizontal line of the first pattern constituting another combination pattern. The one horizontal line is opposite the other horizontal line.
Abstract: According to aspects of the present disclosures, a controller of an image forming apparatus is configured to determine, when printing is started, whether a particular condition is satisfied, the particular condition being satisfied when an elapsed time from a time when the polygon mirror starts rotating to a time when a rotation speed of the polygon mirror has reached a determination speed which is slower than a target speed is less than an upper limit time, when the particular condition is determined to be satisfied, feed the sheet from the sheet tray with the feed roller before the rotation speed reaches the target speed, and when the particular condition is determined not to be satisfied, feed the sheet from the sheet tray with the feed roller after the rotation speed has reached the target speed.
Abstract: A holding member includes a first opposing portion (first inner wall surface) and a second opposing portion (second inner wall surface) which oppose side wall surfaces of a lens array. Side wall surfaces of the lens array on opposite end sides with respect to a longitudinal direction of the lens array are exposed from opposite ends of the first opposing portion and opposite ends of the second opposing portion.
Abstract: In a toric lens comprising a toric surface having a fine uneven structure, the fine uneven structure includes a plurality of holes, the plurality of holes have a hole depth H and a surface opening diameter ?t which satisfy an expression of 0.3?H/?t?0.6, and (a) the plurality of holes have a hole structure having a cylindrical shape on a bottom surface side and a circular truncated cone shape having an opening diameter increasing toward a surface side, or (b) an angle ? formed between an opening portion and the surface of the plurality of holes satisfies 78°???85°.
Abstract: A light emitting device includes: a base plate extending in a first direction; a plurality of light emitting units arranged over a front surface of the base plate while being shifted from each other in the first direction, and each including a support body extending in the first direction and a plurality of light sources supported on the support body while being arranged in the first direction; a flow path disposed on a side of the base plate opposite to a side facing the light emitting units to feed air therethrough in the first direction; and a wire electrically connected to at least one of the plurality of the light emitting units, and disposed inside the flow path.
Abstract: An image forming apparatus with accurate color shift correction with consideration of a change in a rotational speed of a driving portion of a laser scanning member includes a light source, the laser scanning member, a driving portion, a speed controlling portion, a light detecting portion, a light source controlling portion, a scanning lens, a housing, a temperature gradient detecting portion, a first temperature detecting portion, and a correction processing portion. The temperature gradient detecting portion detects a temperature gradient in the housing. The first temperature detecting portion detects a temperature of the scanning lens. The correction processing portion corrects an emission start timing at which light corresponding to a line of image data is emitted from the light source, based on the temperatures detected by the temperature gradient detecting portion and the first temperature detecting portion, the rotational speed of the driving portion, and a preset arithmetic expression.
Abstract: An optical scanning device includes a housing, a transmissive member, a wire-shaped member, a driving portion, a cleaning holder, a cleaning member, a stopper, and a control portion. The control portion is capable of executing a cleaning mode including at least one of a forward travel operation of controlling the wire-shaped member to travel in a first direction so that the cleaning holder moves along the transmissive member and a backward travel operation of, after executing the forward travel operation, controlling the wire-shaped member to travel in a second direction so that the cleaning holder moves in an opposite direction to a direction of the forward travel operation. The control portion executes a load releasing operation of controlling the cleaning holder to move by a prescribed amount in an opposite direction to the direction of the forward travel operation or the direction of the backward travel operation.
Abstract: An image forming apparatus for forming an image in accordance with image information on a sheet includes a photosensitive member; a scanner unit for scanning the member with a laser beam in accordance with the information, the scanner unit including a source for emitting the beam, a deflector having a polygonal mirror for reflecting the beam to deflect it, and a sensor for receiving the beam deflected by the deflector; a controller for controlling scanning start timing of the beam in response to an output of the sensor. A reference position of scanning lines of the beam in a sub-scan direction and a center position of a receipt surface of the sensor in the direction are deviated from each other. For all scanning lines by reflecting surfaces of the rotatable polygonal mirror, only parts, in the direction, of the scanning lines pass the receipt surface of the sensor.
Abstract: An image forming apparatus includes an image carrier, an exposure device, a developer image forming unit, a memory, and a processor. The image carrier carries a developer image. The exposure device exposes the image carrier. The developer image forming unit forms the developer image by transporting a developer to a latent image formed on the image carrier. The processor generates correction data for correcting density unevenness in a main scanning direction detected based on an image generated by the developer image, corrects the density unevenness in the main scanning direction occurring in the developer image by changing an exposure amount when the image carrier is exposed by the exposure device, using the generated correction data, and when a position change of the developer image forming unit in the main scanning direction is detected, adjusts the correction data by a detected position change amount.
Abstract: An image forming apparatus includes a photosensitive member, an exposure portion including surface light emitting element arrays each including light emitting elements, and a clock generating portion. The clock generating portion generates a reference clock signal and a spread spectrum modulation clock signal. The exposure portion exposes the photosensitive member to light by sequentially subjecting a predetermined number of the light emitting elements to light emission control on the basis of a signal obtained by subjecting the modulation clock signal to modulation with image data. A modulation cycle in which a frequency of the modulation clock signal is modulated is n times (n: integer of n>1) an exposure cycle which is a time in which the light emitting elements are subjected to the light emission control on the basis of the reference clock signal.
Abstract: There is provided a pulse signal generation circuit capable of generating a high-resolution pulse signal by generating pattern data by performing a logical operation on rising data that indicates the rising of a pulse signal and falling data that indicates the falling of the pulse signal.
Abstract: An optical scanning device includes a first light source, a second light source, a first aperture, a second aperture, a third aperture, and a deflector. The first light source emits a first light flux. The second light source emits a second light flux. The second light flux is separated from the first light flux by an opening angle in a main scanning direction. The first aperture shapes a beam shape of the first light flux in a sub-scanning direction. The second aperture shapes a beam shape of the second light flux in the sub-scanning direction. The third aperture shapes the beam shape of the first light flux and the beam shape of the second light flux. The deflector deflects the first light flux and the second light flux at positions separated in the sub-scanning direction on a surface.
Abstract: An image processing apparatus capable of suppressing occurrence of an error due to an increase in the amount of data transfer per unit time while suppressing occurrence of an error due to thickness of a conveyed document sheet. A conveying speed of a document sheet is controlled based on the thickness thereof. As a frequency of an image transfer clock for transferring image data of the document sheet from a scanner section to an image processor, a frequency is used which is the lower of a first frequency determined based on whether an image processing process is executed in parallel with any other image processing process different from the image processing process and a second frequency determined based on the thickness of the document sheet.
Abstract: An optical scanner includes a multi beam light source, a scanning optical system, and a controller. The controller specifies selected beams, and changes light quantities of the respective selected beams at the same change timing based on the same profile data at respective positions in the main scanning direction which are fixedly determined as light quantity change positions. When the position of a center region in an arrangement width of the plurality of selected beams is moved in the main scanning direction in response to a selected mode of the beams, in the profile data, the controller derives a shift light quantity at a position shifted in the main scanning direction by an amount corresponding to the movement of the position of the center region, and the light quantity is modified so that the shift light quantity is used at the light quantity change position.
Abstract: The optical scanning apparatus includes a deflecting unit that scans first and second (FaS) scanned surfaces in main scanning direction by deflecting FaS light fluxes incident on a first deflecting surface at different angles with respect to main scanning section in sub-scanning section, and a first optical element including FaS optical portions which guide FaS light fluxes deflected by deflecting unit to FaS scanned surfaces, respectively. An incident surface of first optical element projects most toward deflecting unit at a position of surface vertex on the incident surface in sub-scanning section including the surface vertex. At least one of FaS exit surfaces of FaS optical portions is a sagittal tilt surface. A distance between surface vertices on FaS exit surfaces in sub-scanning section including an incident position of axial ray is larger than the corresponding distance in sub-scanning section including an incident position of outermost off-axis ray.
Abstract: The present invention provides a thinned flexible polyimide substrate and a method for manufacturing the same. The thinned flexible polyimide substrate comprises a polyimide resin, a conductor layer, and a polyimide insulating layer. The polyimide resin has a linear thermal expansion coefficient of less than 40 ppm/K. The conductor layer is formed of a plurality of stacked metal nanoparticles having pores therebetween, and each of the pores has a size between 0.1 ?m and 1 ?m. A portion of the polyimide resin fills into the pores. The polyimide insulating layer is formed of the polyimide resin coated on the conductor layer.
Abstract: An electrophotographic photosensitive member includes an undercoat layer, a charge generation layer, and a charge transport layer in this order. The undercoat layer contains a cured product of a composition containing an electron transport material, a particle having an average primary particle size of 10 nm or more, and a silicone oil. A content of the particle in the undercoat layer is 3% by mass or more and 20% by mass or less. A content of the silicone oil in the undercoat layer is 0.01% by mass or more and 10% by mass or less relative to the content of the particle.
Abstract: According to one embodiment, an image forming apparatus includes a plurality of process units, a transferring member, a sensor, and a processor. The plurality of process units include a photosensitive drum, an electric charger which charges the photosensitive drum, an exposing device which includes a plurality of light emitting element rows in a sub-scanning direction configured by the plurality of light emitting elements, and irradiates the photosensitive drum to form a latent image, and a developing device which attaches toner to the latent image to form a toner image. The transferring member receives the toner image from the photosensitive drum. The sensor detects the toner image transferred to the transferring member. The processor calculates a skew deviation amount based on the detection result of the sensor, and controls turning on and off the light emitting element based on a central tendency and the skew deviation amount.
Abstract: An optical scanning device including: a light source; a deflector that deflects light from the light source; an optical element that guides light deflected by the deflector on an optical path to a photosensor; and a housing that accommodates the deflector and the optical element. The housing is integrally formed and includes a bottom plate, a side wall standing upright from a periphery of a main surface of the bottom plate, and a pair of ribs parallel with each other and standing upright from the bottom plate. Both longitudinal ends of each of the ribs in plan view are joined to the side wall. A region of the bottom plate between the ribs in the plan view has a portion displaced farther upward in an upright direction of the side wall than other regions of the bottom plate.
Abstract: Methods, systems, and devices for operating a ferroelectric memory cell or cells are described. Before reading a memory cell, the voltage on an access line of the memory cell may be initialized to a value associated with the threshold voltage of a switching component in electronic communication with the memory cell. The voltage may be initialized by reducing the existing voltage on the access line to the value. The switching component or an additional pull down device, or both, may be used to reduce the voltage of the access line. After the access line has been initialized to the value, the read operation may be triggered.
Abstract: An optical scanning device includes a deflector configured to deflect first and second beams to scan an effective area of a first scanned surface in a main scanning direction, and first and second imaging optical systems configured to guide the first and second beams deflected by the deflector to first and second areas, respectively, which are included in the effective area and different from each other in the main scanning direction. In the main scanning direction, the first area and the second area are asymmetric in width with respect to an optical axis.
Abstract: A density correction unit calculates a density change rate to a change in an exposure amount as a first density change rate based on a difference between a density of a part of reference patch images, in which a position in a main scanning direction is identical to a position of a first patch image. As for a second patch image, the density correction unit similarly calculates a second density change rate. A light amount when forming the first patch image is smaller than a reference light amount. A light amount when forming the second patch image is larger than the reference light amount. The density correction unit uses the first or the second density change rate based on whether a density of each position of the reference patch images in the main scanning direction higher or lower than a target density to correct the exposure amount.
Abstract: An image forming apparatus includes: a transferer that transfers a toner image formed on a surface of a photo-conductor onto an image carrier; and an irradiator that irradiates the surface of the photo-conductor before transfer with light such that a potential of an image area where the toner image has been formed and a potential of a non-image area where the toner image has not been formed in the photo-conductor before transfer satisfy formula (1): 0?|Va|?|Vb|?200 [V]??(1) where |Va| represents the potential of the image area after the surface of the photo-conductor before transfer is irradiated with light, and |Vb| represents the potential of the non-image area after the surface of the photo-conductor before transfer is irradiated with light.
Abstract: An image forming apparatus including: a light source configured to emit a light beam; a rotary polygon mirror including a plurality of reflection surfaces each configured to deflect the light beam emitted by the light source so that the light beam scans a surface of a photosensitive member; a light receiving portion configured to output a light receiving signal by receiving the light beam reflected by each of the plurality of reflection surfaces; a conversion unit configured to convert the light receiving signal to a pulse signal; a measurement unit configured to measure pulse widths of a plurality of pulse signals corresponding to the plurality of reflection surfaces, respectively; and an identification unit configured to identify a rotation phase of the rotary polygon mirror based on a measurement result of the measurement unit and reference values to be compared with the measurement result.
Abstract: Methods and devices are provided for robotic surgery, and in particular for measuring a rotational position of elongate shafts of surgical tools. For example, a surgical tool is provided with an elongate shaft having an end effector at a distal end thereof. The elongate shaft is rotatable about a longitudinal axis of the shaft, and the surgical tool is configured to measure a rotational position of the shaft about the longitudinal axis relative to an initial position.
Abstract: A light emitting chip including: a substrate that is provided with a first semiconductor laminate part, a tunnel junction layer or a metallic electrically conductive group III-V compound layer, and a second semiconductor layer. The first semiconductor laminate part includes light emitting elements. The tunnel junction layer or the metallic electrically conductive group III-V compound layer is provided on the first semiconductor laminate part. The second semiconductor layer is provided on the tunnel junction layer or the group III-V compound layer, and includes a driving portion. The driving portion includes setting thyristors and drives the light emitting elements to make the light emitting elements be able to shift to an ON state sequentially.
Abstract: A photo drum may be to receive a color separation. A controller may be to change a location of the color separation on the photo drum from a first location to a second location when a separation location history for the color separation is outside of a threshold range.
November 26, 2018
Date of Patent:
August 20, 2019
HP Indigo B.V.
Vitaly Portnoy, Maya Bar-Sadeh, Michel Assenheimer
Abstract: A lens unit according to an embodiment includes: a lens array that includes lens elements each provided with an optical axis and extends in a first direction; a support member that supports the lens array; and an adhesive that bonds the lens array and the support member. The support member includes a first adhesive holding portion with a specified depth in a direction of the optical axis and a second adhesive holding portion shallower than the first adhesive holding portion. The first adhesive holding portion and the second adhesive holding portion are aligned in the first direction. The adhesive is arranged at the first adhesive holding portion and the second adhesive holding portion.
Abstract: An image forming apparatus, having a photosensitive drum assembly, an exposure head, and a bearing, is provided. The photosensitive drum assembly includes a photosensitive drum and a flange disposed at an end of the photosensitive drum in an axial direction of an axis of the photosensitive drum. The flange contacts an inner surface of the photosensitive drum. The exposure head includes a plurality of light emitters aligned along the axial direction of the photosensitive drum, a lens array focusing light from the light emitters on the photosensitive drum, and a head frame to support the light emitters and the lens array. The bearing has a first contact face to contact the exposure head to define a distance between the lens array and the photosensitive drum along a direction of an optical axis of the light.
Abstract: An image forming apparatus includes a control unit: starting up a rotary polygon mirror based on a first signal output by a driving unit thereof; causing a light source to emit a laser-beam while controlling a rotational speed of the rotary polygon mirror based on the first signal to acquire a second signal output from a detecting unit of the laser-beam; turning off the light source after acquiring a phase relation between the first and second signals; causing a charging unit to charge a photosensitive member; making the laser-beam to enter onto the detecting unit without exposing the photosensitive member based on the phase relation in response to the rotational speed reaching a target speed; controlling the rotational speed based on the second signal in response to the laser-beam being entered; and starting image formation in response to the rotational speed converging within a predetermined range including the target speed.
Abstract: An optical scanning device includes a correction mechanism that rotates a synchronization detection mirror around a sub-scanning axis in accordance with a change in the temperature of a casing, wherein the correction mechanism includes a fixing support part provided to the casing and fixing the synchronization detection mirror thereto, and a first adhesive part and a second adhesive part respectively provided at one end side and the other end side of the synchronization detection mirror in a width direction perpendicular to a sub-scanning direction and serving as adhesives for allowing the synchronization detection mirror to adhere to the fixing support part. The correction mechanism is configured to rotate the synchronization detection mirror around the sub-scanning axis due to a difference between of thermal deformation amounts of the first adhesive part and the second adhesive part in a thickness direction when the temperature inside the casing has changed.
Abstract: An optical scanning apparatus includes a deflector configured to deflect a light beam from a light source to cause the light beam to scan a surface to be scanned in a main scanning direction, an incident optical system that includes a single incident optical element and is configured to guide the light beam from the light source to the deflector, and an image-forming optical system configured to condense the light beam having been deflected by the deflector as condensing points on the surface to be scanned. At least one of the incident optical system and the image-forming optical system includes a diffractive surface that corrects displacement amounts of the condensing points in a main scanning section and a sub scanning section when a wavelength of the light beam from the light source varies.
Abstract: A flange portion of this semiconductor laser element is press-fitted, with a front face of the semiconductor laser element serving as the leading head, into an externally-contacting hole portion of a through-hole in a vertical wall portion. The externally-contacting hole portion contacts an outer peripheral surface of the flange portion. A collimator lens is mounted to a support body before or after the flange portion is press-fitted into the externally-contacting hole portion. The press-fitting of the flange portion into the externally-contacting hole portion is stopped at a position where an edge portion, of the flange portion, on the front face side of the semiconductor laser element rests within the externally-contacting hole portion. The collimator lens is mounted to the support body in a path of emitted light in front of the semiconductor laser element.
Abstract: A semiconductor laser driver and an image forming apparatus incorporating the semiconductor laser driver. The semiconductor laser driver includes a light source including a plurality of laser-beam source units disposed in a sub-scanning direction that serves as a group direction, the laser-beam source units having a plurality of groups arranged in a main scanning direction, each of the laser-beam source units emitting a laser beam of a light quantity dependent upon a driving current, a shading corrector to correct, according to at least one shading correction value, the driving current given to the laser-beam source units for each of the groups, and a light quantity adjuster to adjust the driving current according to a light-quantity adjustment value for the laser-beam source units. The image forming apparatus includes a semiconductor laser drive circuit, and the semiconductor laser driver that serves as the semiconductor laser driver.
Abstract: An optical print head comprises a first light emitting element row, a second light emitting element row, a lens array, a first drive circuit and a second drive circuit. The first light emitting element row includes the arrangement of first light emitting elements. The second light emitting element row includes second light emitting elements arranged in parallel with the first light emitting element row. The lens array concentrates light emitted by the first light emitting elements and the second light emitting elements. The first drive circuit drives each first light emitting element with an identical first current value. The second drive circuit drives each second light emitting element with an identical second current value different from the first current value.
Abstract: A laser scanning device includes light source, deflection portion, image forming lens, a block position setting portion, and a light source control portion. The image forming lens condenses a light beam deflected by the deflection portion on a scanned surface, and causes the light beam to be scanned on the scanned surface in a scanning direction at an equal speed. The block position setting portion sets one or more block areas which each include a plurality of section areas sectioned from each other on the scanned surface in the scanning direction. The light source control portion controls the light source to irradiate the light beam to the plurality of section areas at a plurality of irradiation timings that are determined for each of the block areas. The block position setting portion shifts set positions of the block areas along the scanning direction for each scan of at least one line.
Abstract: An optical scanning device includes a housing having light emitting ports extending in a predetermined direction, a transparent cover that closes the light emitting ports, a screw shaft arranged so as to extend in the predetermined direction along the transparent cover, a holding member having an engaging part engaged with the screw shaft, and a cleaning member held to the holing member. An abutting fulcrum is provided at an end of a movement path of the holing member, abuts a predetermined place of a surface of a front side in a progress direction of the holing member, allows the holing member to rotate by employing an abutting part of the holding member with the abutting fulcrum as a fulcrum, and reduces a position shift amount between the one side end portion and the other side end portion of the holing member in the progress direction.
Abstract: An image forming apparatus which makes it possible to grasp such settings of a phase and a main scanning magnification of laser beams as reduce occurrence of moire, by visually checking a plurality of pattern images. Pattern images are formed using a laser beam irradiated from a reference light source and a laser beam irradiated from an adjustment target light source for which each of different phase values is set as a phase setting value. A phase relationship between the phases of the laser beams is adjusted based on the pattern images. Pattern images are formed using a laser beam irradiated from the adjustment target light source for which each of different magnification values is set as a magnification setting value. The magnification of the laser beams is adjusted based on these pattern images.
Abstract: A method and system for generating light pattern using reflective polygons are provided herein. The method may include: rotating at least one polygon having a plurality of reflective facets along a rotation axis parallel to the facets; transmitting a light beam on the facets of the polygon; tilting the light beam relative to the polygon in parallel to the rotation axis so that the light beam hits each of the facets at a different tilt angle, thereby producing a light pattern comprising a plurality of lines; and controlling at least one of: the light intensity, the rotating, and the tilting, so as to produce an adjustable light pattern transmitted at a scene.
Abstract: A light scanning device includes a deflection unit, a first imaging lens, and a second imaging lens. The first imaging lens has a bottom surface adhesively secured to a housing via a plurality of adhesion portions. The second imaging lens has a bottom surface adhesively secured to a top surface of the first imaging lens via a plurality of adhesion portions. The plurality of the adhesion portions interposed between the first imaging lens and the housing are symmetrically located with respect to a center position of the first imaging lens in a main-scanning direction. The adhesion portions interposed between the first imaging lens and the second imaging lens are symmetrically located with respect to the center position of the first imaging lens in the main-scanning direction, and are located outside in the main-scanning direction with respect to the adhesion portions between the first imaging lens and the housing.
Abstract: An image forming apparatus includes an image forming unit in which multiple chips including multiple light emitting elements are arranged in a main scanning direction, the image forming unit forming an image on a recording medium, a reading unit that reads the image fixed on the recording medium by a fixing unit, a density specification unit that specifies a density of a region in the image for each of the chips, the region corresponding to each of the chips, a correction amount specification unit that specifies a correction amount of light quantity from the chip based on an approximate value obtained by approximating the density of a region corresponding to a chip arranged in a predetermined range from a chip for which the correction amount of the light quantity is specified, and a correction unit that corrects the light quantity in accordance with the correction amount.
Abstract: Provided is an optical scanning apparatus, including: a deflection unit; and an imaging optical element (IOE) guiding a light flux deflected by deflection unit onto a scanned surface, in which, an f? coefficient of IOE, a focal length of IOE, and when an intersection between deflection unit and an optical axis of IOE is set as an origin, a coordinate in an optical axis direction (OAD) of an intersection between a principal ray of an outermost off-axis light flux and an incident surface of IOE, a coordinate in OAD of an intersection between principal ray of outermost off-axis light flux and an exit surface of IOE, a coordinate in OAD of an intersection between a principal ray of an on-axis light flux and the incident surface, and a coordinate in OAD of an intersection between principal ray of on-axis light flux and the exit surface are appropriately set.
Abstract: A method determines an identification value of a rotatable element having a plurality of mirror facets. The identification value is determined based on a facet scan duration obtained of the mirror facets or based on a prismatic error of the mirror facets.
January 26, 2015
Date of Patent:
November 22, 2016
Hewlett-Packard Indigo B.V.
Guy Hamou, Michael Plotkin, Haim Livne, Calanit Dotan
Abstract: Disclosed is an image forming apparatus, including: n laser elements arranged in the sub-scanning direction and configured to simultaneously scan an image; a pixel selection unit configured to execute a thinning process in which the pixels are thinned by selecting m pixels among n pixels arranged in the sub-scanning direction, and to output selected pixel information for specifying the selected pixels; a pulse width modulation processing unit configured to sequentially convert image data corresponding to the m pixels into m pulse width modulation signals; a transmission unit configured to transmit the m pulse width modulation signals in parallel; an assignment unit configured to assign the m pulse width modulation signals to m laser elements in accordance with the selected pixel information; and a driving unit configured to drive the laser elements in accordance with the assigned pulse width modulation signals.
Abstract: A processor receives a print job, identifies possible extension marking materials to use to print the print job, and optimizes the order in which the extension marking materials will be used in multiple printing passes. A user interface outputs instructions to insert, into a receptacle, a first interchangeable supply container containing a first extension marking material that is in addition to base marking materials. A printing engine prints first markings (using the first extension marking material) that comprise a first portion of the print job. The user interface outputs instructions to return the partially printed print media to a sheet supply and to insert a second interchangeable supply container containing a second extension marking material. The printing engine prints second markings (using the second extension marking material) that comprise a second portion of the print job, on the partially printed print media, to produce the finally printed print media.
Abstract: In one example, an encoding station of a printing system forms a pattern of non-printed features onto flowing print media. The non-printed features are detected, and timing signals generated from the detected features. The timing signals cause the media to be printed at a desired resolution in the direction of the flow.
June 1, 2012
Date of Patent:
July 26, 2016
Hewlett-Packard Development Company, L.P.
Abstract: Provided is an image forming apparatus including a casing body, an exposure portion in a rod shape that has a connector and exposes a target object, a first support portion that supports the exposure portion over a longitudinal direction of the exposure portion and is removed from the casing body by being moved in the longitudinal direction, and a cable that is connected to the exposure portion via the connector, transmits power to the exposure portion, has a curved area that is a part of the cable in a curved state, and is in contact with the first support portion in a part of the curved area, in a state where the first support portion is accommodated in the casing body.