Shutter Device Patents (Class 347/136)
  • Patent number: 10686159
    Abstract: Devices, components and fabrication methods are provided for improving the efficiency of OLED displays. An outcoupling component such as a microlens array (MLA) is attached to an OLED, with a relatively small distance between the MLA and the OLED. Cross-talk and back scattering are reduced by the use of colored lenses, focusing layers, and other methods.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: June 16, 2020
    Assignee: Universal Display Corporation
    Inventors: Ruiqing Ma, Julia J. Brown, Chaoyu Xiang, Michael Hack, Jason Paynter
  • Patent number: 10218140
    Abstract: The disclosed technology provides a laser security interlocking device and a corresponding method. In one aspect, an example laser security interlocking device includes a housing, a laser capable of emitting laser light in the housing and a laser light-emitting interlocking circuit, with the housing including a door capable of being opened or closed. When the door is closed, the housing can define an enclosed space within which the laser is positioned. The laser light-emitting interlocking circuit is configured to control the laser security interlocking device to automatically stop the laser emitting laser light before or while the door is opened.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: February 26, 2019
    Assignee: Nuctech Company Limited
    Inventors: Huacheng Feng, Yumin Yi, Hongqiu Wang, Rui Fan, Shixin Zhang
  • Patent number: 10097703
    Abstract: An image printing device using a display device according to an embodiment of the present invention comprises: a light collecting device for substantially focusing light output from the display device on a screen of the display device in a vertical direction; and a photographic paper which is located on the light collecting device and is photosensed by light provided from the display device through the light collecting device so that an image displayed on the display device is formed, wherein movement of the photographic paper provided in the image printing device is controlled by an external control device in which the display device is mounted, so that an image displayed on the display device can be formed in the photographic paper provided in the image printing device.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: October 9, 2018
    Inventor: Kyu Yeol Chae
  • Patent number: 9899430
    Abstract: Embodiments of the present disclosure provide a GOA unit and a method for producing the same and a gate driver circuit, which are directed to a field of display technique. The GOA unit includes: a TFT module and a capacitor structure formed on a substrate. The TFT module includes a gate electrode, a source electrode and a drain electrode, and the capacitor structure includes a first electrode and a second electrode configured to form a first capacitor. The gate of the TFT module is located in a same layer as the first electrode of the capacitor structure, the source electrode and the drain electrode of the TFT module are located in a same layer as the second electrode of the capacitor structure, and the second electrode has a groove. Embodiments of the present application are used for a display apparatus.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: February 20, 2018
    Inventors: Xiaoxiang Zhang, Tsung Chieh Kuo, Zheng Liu, Zhichao Zhang, Mingxuan Liu, Xi Chen
  • Patent number: 9746373
    Abstract: The present invention relates to an apparatus for detecting photons according to an atmospheric condition, using a function of adjusting light quantity that can significantly improve reliability of an atmospheric condition analysis result by minimizing noise in a spectrum by maintaining the quantity of incident light uniform within a predetermined range regardless of atmospheric conditions and changes, and to a method of adjusting light quantity. The apparatus for detecting photons in accordance with atmospheric conditions using a function of adjusting light quantity includes: an apparatus case having a light inlet; a light quantity adjuster disposed under the light inlet and adjusting quantity of incident light such that a predetermined quantity of light travels inside; and a controller controlling operation of the light quantity adjuster in accordance with intensity of light detected by the light quantity adjuster.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: August 29, 2017
    Inventors: Young Suk Oh, Tae Young Goo, Jin Ho Shin, Jong Ho Lee, Kyu Sun Chung, Bok Haeng Heo
  • Patent number: 9606501
    Abstract: An image forming apparatus includes a main assembly provided with an opening; a drawer movable while supporting an cartridge including a photosensitive drum between an inside position and an outside position; an optical unit in the main assembly to project light onto the drum a shutter member provided in the main assembly and movable between a closing position and an open position an operating portion to move the shutter member from the open position to the closing position in a process of movement of the drawer from the inside position to the outside position and to move the shutter member from the closing position to the open position in a process of movement of the drawer from the outside position to the inside position.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: March 28, 2017
    Inventors: Takahiro Sakamoto, Yuichi Sakakibara, Tsutomu Nishiuwatoko, Takashi Akutsu, Daisuke Abe, Ken Kikuchi
  • Patent number: 9557155
    Abstract: An optical coherence tomography apparatus includes a light source, a light coupling module, and an optical path difference generating module. The light source emits a coherent light. The light coupling module divides the coherent light into a first incident light and a second incident light. The first incident light is emitted to an item to be inspected and a first reflected light is generated. The second incident light is emitted to the optical path difference generating module, a second reflected light is generated according to the second incident light by the optical path difference generating module through changing the transparent/reflection properties of at least one optical devices of the optical path difference generating module, so that there is a optical path difference between the first reflected light and the second reflected light.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: January 31, 2017
    Inventors: Chung-Cheng Chou, William Wang
  • Patent number: 8098407
    Abstract: The invention aims to provide an image forming apparatus digitally correcting curve and inclination of a laser beam. To this end, provided is an image forming apparatus that corrects a position shift of a scan line in a sub-scanning direction.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: January 17, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Ikeda, Hiroshi Ooya, Toshiaki Shirai
  • Patent number: 8081200
    Abstract: Emission windows are prevented from being contaminated and are cleaned easily. The emission windows for emitting light beams are disposed on a housing of a laser exposure device having optical elements arranged inside for exposing a photoreceptor, and the upper surface of the housing is provided with a slidable shutter with openings. An image forming apparatus includes guide rails independent of the laser exposure device to movably guide predetermined cleaning brushes in the longitudinal direction of the emission windows. When the cleaning brushes are mounted on the guide rails and moved toward the inner side of the apparatus, the cleaning brushes touch a slant portion of a rib and the shutter is moved to the right to align the openings with the emission windows. While the cleaning brushes touch a longitudinally extending portion, the emission windows are exposed to enable the cleaning of the exposed window using the cleaning tool.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: December 20, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshihisa Yamada, Nobuhiro Shirai
  • Patent number: 8035669
    Abstract: According to an aspect of the invention, a control method for an exposure shutter of an image forming apparatus includes, opening the shutter only to a slit glass for monochrome when monochrome printing is performed, and opening the shutter to slit glasses for monochrome and color when color printing is performed.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: October 11, 2011
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventor: Takaji Nakamura
  • Patent number: 7999835
    Abstract: A laser irradiation apparatus and method of fabricating an organic light emitting display using the same are provided. The laser irradiation apparatus includes: a laser generator; a mask having means for changing a propagation path of a laser beam; and a projection lens. The method of fabricating an organic light emitting display includes: irradiating a laser beam on an edge of an irradiated region of a donor substrate using the laser irradiation apparatus with high intensity to form an organic layer pattern on a substrate. The laser beam having low intensity can perform a transfer process to improve laser beam efficiency. In addition, it is possible to reduce damage on the organic layer, and improve quality of the transferred organic layer pattern.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: August 16, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Jae-Ho Lee, Tae-Min Kang, Seong Taek Lee
  • Patent number: 7817176
    Abstract: A disclosed device for optically scanning a target surface includes a light source unit configured to emit a light beam; a light intensity detecting unit; a coupling unit configured to substantially collimate the emitted light beam; a beam limiting unit configured to limit the amount of the collimated light beam; a beam splitting unit configured to split the beam limited light beam and thereby to cause a first portion of the beam limited light beam to enter the light intensity detecting unit, wherein the light intensity detecting unit is configured to detect the intensity of the first portion of the beam limited light beam; and a beam deflecting unit configured to deflect a second portion of the split light beam toward the target surface. In the disclosed device, the beam limiting unit and the beam splitting unit are integrated as a single unitary structure and positioned between the coupling unit and the light deflecting unit.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: October 19, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Koji Masuda
  • Patent number: 7724272
    Abstract: A print unit for transferring an image to a photosensitive medium is provided, and the print unit includes an intercepting member for intercepting light; a first plane light-emitting member for forming a first image by emitting light, provided on one side of the intercepting member; a second plane light-emitting member for forming a second image by emitting light, provided on the other side of the intercepting member; and a control unit for controlling light-emission of the first and second surface emitting members and transferring at least one or more of images to the photosensitive medium.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: May 25, 2010
    Assignee: FUJIFILM Corporation
    Inventor: Hiroyuki Uchiyama
  • Patent number: 7626737
    Abstract: Wide format multiple ROB assembly. Raster Output Bar assembly comprises one or more individual image bars mounted onto their own sub-assemblies. Wide format ROB is assembled at the factory onto a datum structure from individual sub-assemblies staggered to achieve a desired wide format. The sub-assemblies are adjustably positioned on the datum structure based on the datums obtained off of the individual image bars. No further in-machine adjustments are needed in the field.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: December 1, 2009
    Assignee: Xerox Corporation
    Inventor: James W. Patterson
  • Patent number: 7589754
    Abstract: After a voltage of opposite polarity is applied between electrodes of liquid crystal shutters for each of an odd number of colored lights emitted cyclically, a dummy operation of the liquid crystals is performed during a wait period until a next write command pulse is received. During the dummy operation, LEDs which emit the colored lights are kept off. Delays in response of the liquid crystals are reduced by driving the liquid crystals continuously, and molecular arrangement in the liquid crystals is kept constant whenever possible by performing an even number of shutter operations and thereby driving the liquid crystals for the same color with a voltage of the same polarity.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: September 15, 2009
    Assignee: FUJIFILM Corporation
    Inventor: Wataru Sasaki
  • Patent number: 7417653
    Abstract: An image forming apparatus includes an electrostatic latent image forming medium, a charge unit charging the surface of the electrostatic latent image forming medium with a predetermined potential, a toner supply unit (TSU) supplying toner to an electrostatic latent image formed on the surface of the electrostatic latent image forming medium to develop the electrostatic latent image into a toner image, and a transfer unit transferring the toner image to a print medium, the electrostatic latent image forming medium including a transparent frame member, a light source inside the frame member, an optical shutter array including a plurality of optical shutters, and a photoconductive layer on which the electrostatic latent image is formed using light transmitted through the optical shutter array. A diffuser may surround the light source to diffuse light to maintain the intensity of light reaching the optical shutters at a uniform level.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: August 26, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Gee-young Sung, Seong-jin Kim, Seung-joo Shin, Kye-si Kwon
  • Patent number: 7352377
    Abstract: An exposure device is provided with a shutter member having a slit. The shutter member is provided between a member to be scanned and a housing of a main device unit that has an optical transmission member. The shutter member is freely movable between an open position at which the slit is in opposition to the optical transmission member and a shut position at which the slit is not in opposition to the optical transmission member, and a light beam is irradiated through the optical transmission member and the slit to the member to be scanned. Furthermore, in the exposure device, a depressed portion is provided below the slit, and an aperture portion of the depressed portion is in opposition to the slit at least in a state where the shutter member is moved to the shut position at which a light path of the light beam is shut.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: April 1, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yasushi Matsutomo
  • Patent number: 7277107
    Abstract: An image-forming apparatus includes one or more shutters that selectively permit passage of light.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: October 2, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dale R. Kopf, Mark W. Wright, Riyadth F. Al-Kazily
  • Patent number: 7209155
    Abstract: Temperature is detected by a temperature sensor disposed near a recording head. When the detection result is a temperature that is higher than room temperature, an appropriate movement amount of the recording head is calculated from a relation between response speed of the temperature sensor and a LED light amount, and a moving speed of the recording head is controlled. When the result of the detection by the temperature sensor is a temperature that is lower than room temperature, an appropriate exposure amount is calculated from the relation between the response speed of the temperature sensor and the LED light amount, and the amount of light emitted by LEDs is controlled.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: April 24, 2007
    Assignee: FujiFilm Corporation
    Inventors: Hiroyuki Uchiyama, Mutsumi Naruse, Soichiro Kimura
  • Patent number: 7203444
    Abstract: A method and apparatus of image forming includes an optical writing device and an image carrier. The optical writing device includes a housing, a dustproof member, a light source, and a shield. The housing is provided with an opening. The dustproof member is light permeable and closes the opening. The light source is installed in the housing and irradiates the image carrier with a light beam through the dustproof member. The shield is movable between a first position to cover the dustproof member and a second position to uncover the dustproof member. The optical writing device also includes a cleaner attached to the shield and contact the dustproof member. The optical writing device also includes a driver for moving the shield. The optical writing device further includes a positioning mechanism for positioning the shield to the first position by using the driver.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: April 10, 2007
    Assignee: Ricoh Company Ltd.
    Inventor: Kozo Yamazaki
  • Patent number: 7199810
    Abstract: A beam scanning apparatus projects a beam onto a photoconductive drum according to corresponding image data, and includes a micro polarized array which is formed to receive a beam emitted from a light source and has a plurality of polarized cells arrayed in a predetermined direction. A polarization direction adjuster adjusts transmission directions of polarized elements of each polarized cell according to the image data. A light detecting plate receives the beam from the micro polarized array, transmitting polarized elements having a predetermined direction to a photoconductive drum.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: April 3, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dae-hwan Kim
  • Patent number: 6856426
    Abstract: An 8-bit (256 gradient) image is represented using a driver IC of 6-bit (64 gradient) construction to drive a plurality of arrayed optical shutter elements. The image data are divided into 64 gradient sections, synchronized by shift clock signals, and transmitted in four cycles to the shift register. The optical shutter element is not turned OFF at the 64th pulse, but is continuously driven without transmitting to the comparator the standard clock signal of the 64th pulse, which controls the ON time of the optical shutter element. In this way, an image of a higher number of gradient levels can be represented using a driver IC of a low number of bits, thereby providing a solid state scanning type optical recording device which suppresses noise generation by reducing the load on the driver IC when driving at multi-level gradient.
    Type: Grant
    Filed: November 16, 1999
    Date of Patent: February 15, 2005
    Assignee: Minolta Co., Ltd.
    Inventor: Yuta Miyagawa
  • Publication number: 20040021762
    Abstract: The present invention relates to a small optical writing head, such as an organic EL array exposure head, having long work distance with little crosstalk, a method of manufacturing the same, and an image forming apparatus using the same. The optical writing head is an optical writing head which projects fluxes of modulated light from light-emitting parts 2 of a light-emitting element array such as an organic EL array or fluxes of modulated light transmitted through shutter parts 2 of an optical shutter element array onto an image carrier 11 to form a predetermined pattern on the image carrier 11. The optical writing head comprises ball lenses 10 which are arranged such that the alignment of the ball lenses 10 corresponds to the alignment of the light-emitting parts 2 of the light-emitting element array or the shutter parts 2 of the optical shutter element array.
    Type: Application
    Filed: March 10, 2003
    Publication date: February 5, 2004
    Inventors: Hideya Seki, Masatoshi Yonekubo
  • Patent number: 6677971
    Abstract: Pixel shapes 90a′ formed by respective optical shutters 90′ are set to parallelograms, and an alignment of the parallelograms is set to overlap partially with recording loci K of parallelogram pixels formed by adjacent optical shutters when scanning is executed in the main scanning direction.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: January 13, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yoshiharu Sasaki
  • Patent number: 6519350
    Abstract: A method and arrangement for embedding a watermark in an image are disclosed. The watermark consists of a pseudo-random, dense subset of image pixels, e.g. a pattern of lines (20). A number of salient image pixels (21-26), for example, local extremes, corners or edges, is identified and it is determined whether they lie on (i.e. within a vicinity &dgr; of) the line pattern (21-23) or not (24-26). In an unwatermarked image (FIG. 2A), the number of most salient pixels (21) lying on the watermark is substantially the same as the number of most salient pixels (25,26) not lying on the watermark. The image is watermarked (FIG. 2B) by modifying the saliency of the salient pixels in such a way that a significant majority (21,23) of the most salient pixels (21,23,25) is eventually located within the vicinity of the line pattern.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: February 11, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Cornelis W. A. M. Van Overveld, Peter M. J. Rongen, Maurice J. J. J.-B. Maes
  • Patent number: 6337706
    Abstract: A solid scanning optical writing device has multiple optical elements which are aligned in a zigzag fashion to form two lines in a main scanning direction. Each of the optical elements is turned ON/OFF in accordance with image data to write an image. In the solid scanning optical writing device, the amount of light output from each of optical elements is corrected based on correction data. The correction data is obtained by detecting light amount distribution of each of the two lines and obtaining ridge light amount and trough light amount from the detected light amount distributions.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: January 8, 2002
    Assignee: Minolta Co., Ltd.
    Inventor: Atsushi Fujita
  • Publication number: 20020001006
    Abstract: An ink jet printer forms an image frame in a continuous recording sheet at a size PL with reference to a feeding direction. The continuous recording sheet includes plural recording sheets, and a splicing portion for splicing the plural recording sheets to one another in one line. In ink jet printing, the image frame is printed to the continuous recording sheet with a printing bead while the continuous recording sheet is fed in the feeding direction. It is detected whether the splicing portion comes past a predetermined position upstream from the printing head at a distance L1. The printing head is inhibited from printing the image frame if an unavailable region including the splicing portion is estimated to overlap on a region of the image frame according to a detection signal from the detecting step.
    Type: Application
    Filed: May 25, 2001
    Publication date: January 3, 2002
    Inventors: Nobuo Matsumoto, Eiichi Kito, Kiyotaka Kaneko, Yasuyuki Hosono
  • Patent number: 6330016
    Abstract: An image recording apparatus includes a PLZT head. The PLZT head performs an interval exposure based on an interval exposure data between exposures of photosensitive material. Further, exposure data of a predetermined number of lines already used in an N-th and preceding exposures may be maintained in a RAM as a basis of correction to an exposure data for an N+1-th print. The PLZT head performs an exposure for an exposure time given by the corrected exposure data.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: December 11, 2001
    Assignee: Noritsu Koki Co., Ltd.
    Inventor: Toru Tanibata
  • Patent number: 6310712
    Abstract: A light modulating or switching array (10) having a plurality of discrete protrusions (16) formed of electro-optic material, each of which is electrically and optically isolated from each other. The protrusions (16) have defined a top face (20), a bottom face (30), first and second side faces (22, 24), and front and back faces (26, 28). There are a plurality of electrodes (34) associated with each of the protrusions (16), these electrodes (34) being capable of inducing an electric field in the electro-optic material for independently modulating a plurality of light beams which are incident upon one of the faces (20, 22, 24, 26, 28, 30) of the protrusions (16). The electro-optic material may be of PLZT, or a member of any of the groups of electro-optic crystals, polycrystalline electro-optic ceramics, electro-optic semiconductors, electro-optic glasses and electro-optically active polymers.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: October 30, 2001
    Assignee: Teloptics Corporation
    Inventor: Alexander B. Romanovsky
  • Patent number: 6188425
    Abstract: An optical shutter drive period detector detects a drive period of each optical shutter element. Based on the detected drive period, an optical shutter drive voltage control device sets an optical shutter driving voltage which is applied to an optical shutter driver. Furthermore, an optical shutter open period controller sets an optical shutter open period corresponding to the set optical shutter driving voltage and to a tone level of a pixel to be exposed and the optical shutter open period is input to the optical shutter driver as data for changing an optical shutter open period. Based on the optical shutter driving voltage and the optical shutter open period changing data, the optical shutter driver drives each optical shutter element of an optical shutter array, an electrostatic latent image is formed on a surface of a photosensitive drum, and the electrostatic latent image is developed by a developer, transferred by a transfer/separation charger onto a recording sheet and discharged.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: February 13, 2001
    Assignee: Minolta Co., Ltd
    Inventors: Kuniya Matsuura, Kazuhiro Sakamoto
  • Patent number: 6124872
    Abstract: Disclosed is an optical writing device having an array of a plurality of writing light shutter elements for an image forming purpose. The optical writing device also has at least one first monitoring light shutter element and at least one second monitoring light shutter element. During recording period, the first second monitoring light shutter element is frequently driven, and the second monitoring light shutter element is infrequently driven. After the recording period, the first and second monitoring light shutter elements are driven with varying voltage, and light amounts from the first and second monitoring light shutter elements are sensed by a sensor. Based on the output from the sensor, optimal drive voltage for the next recording period is set.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: September 26, 2000
    Assignee: Minolta Co., Ltd.
    Inventors: Ken Matsubara, Tomohiko Masuda, Yuji Kamoda
  • Patent number: 6057955
    Abstract: An optical modulation element is constructed of an electro-optic crystal substrate, which includes individual electrodes arrayed and formed one-dimensionally on one surface of the substrate and also includes a common electrode formed on the other surface in opposition to the plurality of individual electrodes. The portion of the electrode-optic crystal substrate, interposed between the common electrode and each the individual electrode, constitutes an aperture portion. The aperture portion is switched between a light-transmitting state and a light cut-off state by controlling voltage between the opposite electrodes. Light incident on the aperture portion in a direction perpendicular to the arrayed direction of the individual electrodes from one surface of the electro-optic crystal substrate is modulated.
    Type: Grant
    Filed: December 8, 1998
    Date of Patent: May 2, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Ryoichi Yamamoto
  • Patent number: 6052144
    Abstract: A printer to print images on a continuous web. The printer has a print station at which the images are printed on the web. A web transport transports the web in a lengthwise direction through the print station. The web transport including a slack loop station having a web feeder and a web receiver. These are spaced apart from one another to transport a web in the lengthwise direction while establishing a web slack loop therebetween which extends in a first direction. The web transport also includes a web proximity sensor which is directed along the first direction to measure a distance between the sensor and the slack loop. A method of printing images on a continuous web is also provided.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: April 18, 2000
    Assignee: Eastman Kodak Company
    Inventor: Noel L. Reyner
  • Patent number: 5969741
    Abstract: Raster scanner assemblies, and machines which use such raster scanner assemblies, which produce spots having a variable spot dimension. Raster scanner assemblies according to the present invention include an electronic subsystem which produces both image data and a spot size control signal, a laser assembly which produces a polarized laser beam having a beam with a first dimension and which is modulated in accord with the image data, a variable aperture assembly which changes the first dimension of the laser beam, a rotating polygon having a plurality of facets sweeping the laser beam in a sweep plane, and a scan lens for focusing the laser beam onto an image plane. The variable aperture assembly beneficially includes both a liquid crystal cell, which receives the laser beam and the spot size control signal, and a polarizing filter.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: October 19, 1999
    Assignee: Xerox Corporation
    Inventors: James J. Appel, John R. Andrews
  • Patent number: 5936652
    Abstract: According to one aspect of the present invention, there is provided a printhead protective cover (50) which includes a shutter blade (60), an actuator (70) for moving the shutter blade (60), and a light trap (54) to prevent light from the printhead (12) from passing around the shutter blade (60). In one embodiment, a sensor detects a position of the shutter blade (60) and sends a signal to shutoff the actuator (70) when the shutter blade (60) is in an open position, or the shutter blade (60) is in a closed position. In yet another embodiment, the actuator (70) closes the shutter blade (60) in response to a tear in a web or failure of a dryer. In a further embodiment, the shutter blade (60) slides on a base plate coated with a low friction, non-volatile, non-liquid material, and the shutter blade (60) slides at an oblique angle on the base plate.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: August 10, 1999
    Assignee: Eastman Kodak Company
    Inventors: Badhri Narayan, Robert C. Bryant, David J. Nelson, Laurie L. Voci
  • Patent number: 5930021
    Abstract: An optical shutter element drive mechanism for driving optical shutter elements that are electrically equivalent to condensers by charging and discharging the elements by a power source and switching elements. The optical shutter element drive mechanism includes a resistor through which a current for charging the optical shutter elements flows when the optical shutter elements are charged and through which a current for discharging the optical shutter elements flows when the optical shutter elements are discharged.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: July 27, 1999
    Assignee: Minolta Co., Ltd.
    Inventors: Ken Matsubara, Yuji Kamoda, Tomohiko Masuda
  • Patent number: 5872587
    Abstract: A light signal generating device wherein a line of light shutter elements made of PLZT are turned on and off individually in accordance with a driving signal corresponding to image data, and each turned-on light shutter element generates a light signal. The light shutter elements are impressed with a specified voltage by order of a composite signal made by combining a modulation signal modulated in accordance with the image data and a micro duration pulse signal.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: February 16, 1999
    Assignee: Minolta Co., Ltd.
    Inventors: Atsushi Fujita, Kenichi Wada, Tomohiko Masuda
  • Patent number: 5831657
    Abstract: An image forming apparatus according to the present invention comprises image forming unit for forming an image from a plurality of first pixels having a predetermined size, and smoothing processing unit for executing a smoothing process by controlling the image forming unit so that picture elements situated near the outline of the image formed by unit of the image forming unit are composed of second pixels having a size larger than that of the first pixels.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: November 3, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Eiichi Sakaue, Masafumi Mori
  • Patent number: 5694161
    Abstract: An image forming apparatus includes a photoreceptor allowing an electrostatic latent image to be formed by light exposure, a light source emitting light beams, a light deflecting device for deflecting light beams from the light source, an exposure controlling device for controlling deflecting actions of the deflecting device, and an image-forming optical device receiving light beams deflected by the light deflecting device and image-forming the light beams on the photoreceptor so as to create a latent image composed of a plurality of pixels thereon. In the configuration, the light deflecting device includes a micro-mirror array device which is composed of a multiple number of mirror facet elements arranged matrix-wise, in two-dimensions, and which is disposed so that each row of the mirror facet elements extends in parallel with the rotating axis of the photoreceptor and normals of the mirror facet elements are substantially perpendicular to the rotating axis of the photoreceptor.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: December 2, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiro Oikawa, Iwakazu Honda, Yoichi Yamamoto
  • Patent number: 5491566
    Abstract: An integrated input-output device for a data communication terminal equipment including a plurality of photoelectric converting circuits respectively arranged in n aligned blocks each including m aligned photoelectric converting elements, a plurality of first switching circuits respectively arranged in n aligned blocks each including m aligned thin film transistors respectively connected to the photoelectric converting elements of each corresponding one of the photoelectric converting circuits, a plurality of recording circuits respectively arranged in n aligned blocks each including m aligned recording elements, a plurality of second switching circuits respectively arranged in n aligned blocks each including m aligned thin film transistors respectively connected to the recording elements of each corresponding one of the recording circuits, n gate address lines respectively connected in common to gate electrodes of all thin film transistors of the same block-numbered first and second switching circuits, and m
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: February 13, 1996
    Assignee: Goldstar Co., Ltd.
    Inventors: Tae K. Oh, Kyu N. Choi, Chang W. Hur
  • Patent number: 5428371
    Abstract: An imaging system comprising a source of light movable with respect to a writing element and projectable thereon to generate an image, a focusing system is provided for focusing a light source which generates a first beam of light of a wavelength selected to be actinic with respect to the writing element. At least a portion of the first beam of light is absorbed by the writing element. The apparatus includes a roll supply of a donor material and a receiver material and a cutter to automatically supply donor sheets and receiver sheets independently to a writing platen or drum, and to selectively load and unload the donor sheets from superposition with the receiver sheet without disturbing the registration of the receiver sheet.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: June 27, 1995
    Assignee: Eastman Kodak Company
    Inventors: Frederick B. Fox, Michael H. Parsons, James L. Mohnkern
  • Patent number: 5414553
    Abstract: There is disclosed a line printing system of this invention which utilizes an array of asymmetrical Fabry-Perot light valves for simultaneously transferring all pixel information of one raster line onto a photoreceptor. The number of elements of the light valve array used in this invention is equal to the number of pixels on a raster line. The pixel information is applied to elements of the light valve array in a parallel format with information representing each pixel applied to one elemental light valve of the array. The array is illuminated by a wedge-shaped incident light beam forming a focussed line image. Depending on the information state of each pixel, each corresponding element will be activated to absorb incident light or left in its neutral state to reflect the light. Light reflected by neutral elements will be directed onto the photoreceptor. In this fashion, the photoreceptor simultaneously receives the pixel information for the entire raster line.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: May 9, 1995
    Assignee: Xerox Corporation
    Inventors: Rogelio F. Nochebuena, Thomas L. Paoli