By History Of Recording Elements Patents (Class 347/195)
  • Patent number: 8967756
    Abstract: According to one embodiment, a printer includes an image forming unit, a coloring conversion unit, and a deterring unit. The image forming unit forms an image from a temperature-sensitive ink whose color is changed depending on a temperature on a medium. The coloring conversion unit converts a coloring state of the image of the temperature-sensitive ink by heating or cooling the image of the temperature-sensitive ink. The deterring unit provided between the coloring conversion unit and the image forming unit deters an air heated or cooled by the coloring conversion unit from flowing toward the image forming unit.
    Type: Grant
    Filed: April 19, 2012
    Date of Patent: March 3, 2015
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Hiroyasu Ishii, Kiyoshi Morino, Sadayoshi Mochida, Chikahiro Saegusa
  • Patent number: 8902472
    Abstract: A printer includes a recording unit that executes on a recording medium, a recording operation under a sublimation transfer scheme; a conveying unit that using a protrusion roller having protrusions protruding toward an outer periphery and abutting a first surface of the recording medium, conveys the recording medium to a recording position for the recording operation; a pseudo recorded image data producing unit that produces pseudo recorded image data that includes pseudo pixels obtained by correcting a density of each predetermined pixel that is determined corresponding to an arrangement pattern of the protrusions on the protrusion roller and is determined from among pixels to be recorded in a second area that excludes a first area that is in contact with the protrusions, on the first surface of the conveyed recording medium; and a recording control unit that controls the recording unit based on the pseudo recorded image data.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: December 2, 2014
    Assignees: Citizen Holdings Co., Ltd., Citizen Systems Japan Co., Ltd.
    Inventors: Yutaka Inokuchi, Takeshi Yamazaki
  • Publication number: 20140253659
    Abstract: In accordance with one embodiment, a duplex printer apparatus comprises a first printing section configured to use an inkjet mechanism for carrying out printing on a first surface of a paper wound in a roll shape; a second printing section configured to be arranged at the downstream side of the first printing section in a paper conveyance direction and use a thermal printing mechanism for carrying out printing on a second surface serving as the back side of the first surface of the paper; and a heat amount changing section configured to change, according to the difference of printing by the first printing section, a driving condition of the thermal printing mechanism when the second printing section applies heat to a paper.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 11, 2014
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Hiroyuki Inaba
  • Patent number: 8803932
    Abstract: A printer includes a thermal head including a line head in which heating elements are arranged in a straight line, a feed device being configured to feed a printing medium in a vertical scanning direction, and a control device being configured to control the feed device and the thermal head, the printer performing printing by forming a print dot by heating on the printing medium. Each iteration of the pulse application cycle is a time period from a main heating starting time to a next main heating starting time. The control device, in a case where the main heating is not performed on a second heating element adjacent in a main scanning direction to a first heating element, is configured to perform printing by using a first mode, in which applying of a first sub-pulse to the second heating element is performed starting from the main heating starting time.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: August 12, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Megumi Matsutani
  • Patent number: 8687031
    Abstract: A printing control unit for a thermal printer that prints by applying heat energy to a recording medium and is able to operate in multiple print modes, includes a line buffer unit, a shift register unit, and a configuration registration unit. The line buffer unit accumulates current dot printing data supplied from a host. The shift register unit gets and passes the current dot printing data and previous dot history data from the line buffer unit to a logic circuit unit. The configuration registration unit stores configuration data for setting data logic of the logic circuit unit.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: April 1, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Satoru Imai
  • Patent number: 8564632
    Abstract: A thermal printer includes a thermal head and a control unit that controls energization of each of a plurality of heater elements based on printing data including a plurality of line data arrays corresponding to the plurality of heater elements respectively, for selectively heating up the plurality of heater elements, and performs printing according to an order at the printing data while taking a line data array as a basic unit, on each printing cycle including a heating period and a non-heating period. The control unit delays a start of a heating period in a printing cycle with respect to a start of the printing cycle for a predetermined time period when a predetermined condition with respect to the line data array is satisfied.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: October 22, 2013
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Megumi Matsutani
  • Patent number: 8393695
    Abstract: A thermal printer for printing by applying heat energy to a recording medium uses a single logic circuit arrangement to enable operating in a plurality of print modes, and enables easily changing the control logic of each print mode to afford high quality printing. Heating elements apply heat energy to the recording medium. A heating element drive circuit is provided for each heating element to drive a particular heating element. A printing control unit 13 supplies predetermined drive signals to the heating element drive circuits based on pixel printing data input from an external source. The printing control unit 13 comprises a configuration registration unit 36 for storing predetermined value groups corresponding to the drive signal supply patterns so that the value groups can be changed.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: March 12, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Satoru Imai
  • Patent number: 8368933
    Abstract: An image forming device, comprising: an image formation unit configured to form an image on a recording medium in accordance with a print command transmitted from an external device; a print history writing unit configured to record print history concerning image formation by the image formation unit in a server connected to the image forming device via a network; and a writing information transmission unit configured to transmit, to the external device, writing information including information indicating whether the print history writing unit has successfully recorded the print history in the server.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: February 5, 2013
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Shohei Tsujimoto
  • Patent number: 8330781
    Abstract: A thermal head avoids a drop in print quality caused by adhesion of printing chaff. A thermal head 39 that presses against thermal paper that moves from one side to the other side and prints by melting dye contained in the thermal paper has a glazed layer 150 that is formed in an area on one part of a ceramic substrate 43 and stores in-flowing heat, and a heating resistor 140 that is located offset to one side from the center of the glazed layer 150, selectively heats the thermal paper S pressed in contact therewith, and melts a dye material contained in the thermal paper. A smooth surface P against which the thermal paper S heated by the heating resistor 140 slides is formed to the other side of the glazed layer 150 from the heating resistor 140.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: December 11, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Kohei Osawa, Satoshi Nakajima, Akira Koyabu
  • Patent number: 8284223
    Abstract: A thermal printing mechanism includes a head unit having a heating element; an energizing unit that energizes the heating element; and an energizing control unit that controls the energizing unit to energize the heating element for a total energization time set according to a color density of a pixel so that the higher the color density is, the longer the total energization time becomes. The energizing control unit divides the total time period into energization time units, based on printing speed; specifies energization time units for energization so that a sum thereof is equivalent to the total energization time; and performs control so that if the printing speed is lower than a first printing speed, the energization time units appear continuous, and if the printing speed is equal to or higher than the first printing speed, the energization time units do not appear continuous.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: October 9, 2012
    Assignees: Citizen Holdings Co., Ltd., Citizen Systems Japan Co., Ltd.
    Inventor: Kenji Mito
  • Publication number: 20120218367
    Abstract: Thermal history control is performed in a thermal printer in which a single thermal print head prints sequentially on multiple color-forming layers in a single pass. Each pixel-printing interval may be divided into segments, each of which may be used to print a different color. The manner in which the input energy to be provided to each print head element is selected may be varied for each of the segments. Different energy computation functions may be used to compute the energy to be provided to the print head in each of the segments based on the predicted print head element temperature at the beginning of the segment, the color to be printed, and the energy that was supplied when printing other colors during the time period between the beginning of the segment of the current pixel-printing interval and the end of the equivalent segment of the previous pixel-printing interval.
    Type: Application
    Filed: August 28, 2011
    Publication date: August 30, 2012
    Inventor: Suhail S. Saquib
  • Patent number: 8184315
    Abstract: A method and apparatus for providing devices with job history information on image forming jobs are provided, in which job history information corresponding to image forming jobs of the devices are generated. The job history information is transmitted to any device selected from the devices.
    Type: Grant
    Filed: July 18, 2006
    Date of Patent: May 22, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tae-jung Yun
  • Patent number: 8164608
    Abstract: A thermal printer comprising a printing control unit for correcting current dot printing data supplied from a host based on a previous dot history, and supplying the dot printing data to a print head unit. In accordance with the invention, the printing control unit comprises a line buffer unit for accumulating the current dot printing data; a shift register unit for getting and passing the current dot printing data and previous dot history data from the line buffer unit to a logic circuit unit, which is capable of changing data logic for driving the print head unit based on output from the shift register unit; a configuration registration unit for storing configuration data for setting the data logic of the logic circuit unit according to an energizing pattern; a node control circuit unit for switching the logic circuit unit to output data to the print head unit; and a sequencer unit for controlling the timing of the shift register units, the logic circuit units, and the node control circuit unit.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: April 24, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Satoru Imai
  • Patent number: 8164607
    Abstract: A printing apparatus is provided which uses, as a print head, a thermal head having heating elements arrayed in a line perpendicular to the traveling direction of a printing medium. Correspondingly pixel data, at either end, or near the end, of each line of image data going to be printed, data on heat storage in the thermal head (108) is calculated for each line on the basis of data on heat storage in the print head for a preceding line, and the data on heat storage in the print head for each line is compared with predetermined-temperature data. When any of the stored-heat data is larger than the predetermined-temperature data, energy to the heating element (113) is decreased. The image data is printed on the printing medium (104) with the energy for application to the heating element (113) being kept decreased.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: April 24, 2012
    Assignee: Sony Corporation
    Inventors: Hiroaki Takano, Naoki Takizawa
  • Publication number: 20110242255
    Abstract: A thermal printer includes a thermal head and a control unit that controls energization of each of a plurality of heater elements based on printing data including a plurality of line data arrays corresponding to the plurality of heater elements respectively, for selectively heating up the plurality of heater elements, and performs printing according to an order at the printing data while taking a line data array as a basic unit, on each printing cycle including a heating period and a non-heating period. The control unit delays a start of a heating period in a printing cycle with respect to a start of the printing cycle for a predetermined time period when a predetermined condition with respect to the line data array is satisfied.
    Type: Application
    Filed: February 17, 2011
    Publication date: October 6, 2011
    Applicant: BROTHER KOGYO KABUSHIKI KAISHA
    Inventor: Megumi MATSUTANI
  • Patent number: 8009184
    Abstract: Thermal history control is performed in a thermal printer in which a single thermal print head prints sequentially on multiple color-forming layers in a single pass. Each pixel-printing interval may be divided into segments, each of which may be used to print a different color. The manner in which the input energy to be provided to each print head element is selected may be varied for each of the segments. Different energy computation functions may be used to compute the energy to be provided to the print head in each of the segments based on the predicted print head element temperature at the beginning of the segment, the color to be printed, and the energy that was supplied when printing other colors during the time period between the beginning of the segment of the current pixel-printing interval and the end of the equivalent segment of the previous pixel-printing interval.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: August 30, 2011
    Assignee: ZINK Imaging, Inc.
    Inventor: Suhail S. Saquib
  • Publication number: 20110181678
    Abstract: A thermal printing mechanism includes a head unit having a heating element; an energizing unit that energizes the heating element; and an energizing control unit that controls the energizing unit to energize the heating element for a total energization time set according to a color density of a pixel so that the higher the color density is, the longer the total energization time becomes. The energizing control unit divides the total time period into energization time units, based on printing speed; specifies energization time units for energization so that a sum thereof is equivalent to the total energization time; and performs control so that if the printing speed is lower than a first printing speed, the energization time units appear continuous, and if the printing speed is equal to or higher than the first printing speed, the energization time units do not appear continuous.
    Type: Application
    Filed: January 6, 2011
    Publication date: July 28, 2011
    Applicants: CITIZEN HOLDINGS CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.
    Inventor: Kenji MITO
  • Patent number: 7880754
    Abstract: In a method for activation of a print head operating according to the thermotransfer principle, the print head having a number of printing elements, in which the energy quantity to be supplied to a printing element is determined in a determination step, and the energy quantity is supplied to the printing element in a supply step in order to transfer ink from an ink carrier device associated with the print head onto a substrate associated with the ink carrier device. A print parameter set characteristic of the ink carrier device is read from a memory associated with the ink carrier device in a read step preceding the determination step and the energy quantity is determined in the determination step using at least the print parameter set.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: February 1, 2011
    Assignee: Francotyp-Postalia GmbH
    Inventor: Christoph Kunde
  • Publication number: 20100302336
    Abstract: A thermal printer comprising a printing control unit for correcting current dot printing data supplied from a host based on a previous dot history, and supplying the dot printing data to a print head unit. In accordance with the invention, the printing control unit comprises a line buffer unit for accumulating the current dot printing data; a shift register unit for getting and passing the current dot printing data and previous dot history data from the line buffer unit to a logic circuit unit, which is capable of changing data logic for driving the print head unit based on output from the shift register unit; a configuration registration unit for storing configuration data for setting the data logic of the logic circuit unit according to an energizing pattern; a node control circuit unit for switching the logic circuit unit to output data to the print head unit; and a sequencer unit for controlling the timing of the shift register units, the logic circuit units, and the node control circuit unit.
    Type: Application
    Filed: August 13, 2010
    Publication date: December 2, 2010
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Satoru Imai
  • Patent number: 7750930
    Abstract: A printing apparatus is provided which uses, as a print head, a thermal head having heating elements arrayed in a line perpendicular to the traveling direction of a printing medium. Correspondingly pixel data, at either end, or near the end, of each line of image data going to be printed, data on heat storage in the thermal head (108) is calculated for each line on the basis of data on heat storage in the print head for a preceding line, and the data on heat storage in the print head for each line is compared with predetermined-temperature data. When any of the stored-heat data is larger than the predetermined-temperature data, energy to the heating element (113) is decreased. The image data is printed on the printing medium (104) with the energy for application to the heating element (113) being kept decreased.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: July 6, 2010
    Assignee: Sony Corporation
    Inventors: Hiroaki Takano, Naoki Takizawa
  • Publication number: 20100066797
    Abstract: A method of controlling thermal printing based upon print density. The method includes receiving pre-formatted data representing information to be printed on two sides of a thermal print media from a computer by a processor of a thermal printer, analyzing the pre-formatted data by the thermal printer to determine different types of data to be printed with different print densities by the processor, determining an average print density of the different print densities by the processor, determining that the average print density is greater than a predetermined average print density by the processor, determining a power level required to print the data, and directing first and second thermal print heads to print the data based upon the required power level by the processor.
    Type: Application
    Filed: September 17, 2008
    Publication date: March 18, 2010
    Inventor: Randall L. Morrison
  • Patent number: 7542060
    Abstract: High print quality from a thermal printer is maintained while the print speed is decreasing without producing white streaks or uneven print density by controlling the hysteresis coefficient of the thermal print head 35 based on the energizing history of the thermal print head 35 and print speed control factors used for determining print speed, which is the speed at which the paper is advanced while printing.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: June 2, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Akira Koyabu, Satoshi Nakajima, Yuji Takiguchi
  • Publication number: 20080316291
    Abstract: A parametric programmable thermal printer is disclosed. The printer may include a controller that performs functions such as thermal history control and common mode voltage correction. The controller may be implemented in an integrated programmable medium such as a Field-Programmable Gate Array (FPGA). Functions performed by the controller may be parameterized, and parameter values may be stored in registers. The controller may be used with a different thermal printer by changing the parameter values and/or reprogramming the programmable medium, and without otherwise redesigning or remanufacturing the controller.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 25, 2008
    Inventor: Thomas J. LeBlanc
  • Patent number: 7446788
    Abstract: A method and apparatus for transferring an image of predetermined length onto a substrate by selective energisation of a row of printing elements in a printhead of a printing apparatus. The printing apparatus may be arranged with a print ribbon located between the printhead and the substrate such that ink is selectively transferred from the ribbon to the substrate as a result of energisations of the printing elements. The image to be printed is rendered in memory as a series of rows of pixels and the apparatus is set up to download the rendered rows of pixels to the printhead successively. The relative positioning of successively printed rows of pixels on the substrate is determined by relative displacement between the printhead and the substrate. The apparatus is set up to control the positioning of the rows of pixels by controlling the delay between successive energisations of the printing elements.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: November 4, 2008
    Assignee: Zipher Limited
    Inventor: Philip Hart
  • Patent number: 7352380
    Abstract: A thermal head printer includes a platen, a thermal head having a heating element, a heating-value arithmetic unit, a heating-value comparator, an excess-value counter, and a heating-value controller. The thermal head printer performs a printing operation by conveying a recording medium between the platen and the thermal head and heating the heating element on the basis of image data to be printed. The heating-value arithmetic unit calculates heating values for the heating element corresponding to the image data. The heating-value comparator compares each calculated heating value with a reference heating value of the heating element. The excess-value counter counts the number of calculated heating values that exceed the reference heating value so as to determine an excess-value number. The heating-value controller limits the heating values of the heating element if the excess-value number exceeds a reference number.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: April 1, 2008
    Assignee: Sony Corporation
    Inventors: Hiroaki Takano, Naoki Takizawa, Shinji Kato, Akihiro Horii
  • Patent number: 7304658
    Abstract: A thermal printer comprises: a ROM 11 for storing a heat history correction table; a RAM 12 for storing the density-related energizing time data for the first and second preceding lines printed immediately before the current line to be printed and the density-related energizing time data before a correction for the current line to be printed which includes a target dot T; and a control section for comparing the density-related energizing time data for the first and second preceding lines and the density-related energizing time data before a correction for both adjacent dots T1 and T2 of the target dot T with the density-related energizing time data before a correction for the target dot T to select reference data, and further for performing a corrective operation for the pre-correction energizing time data for the target dot T using thus selected reference data to calculate energizing time data for the target dot T to be printed, whereby it is possible to prevent the temperature of a thermal head from being r
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: December 4, 2007
    Assignee: Funai Electric Co., Ltd.
    Inventors: Tadahiro Naito, Yutaka Noda
  • Publication number: 20070273743
    Abstract: The embodiments of the present invention relate to a double-side printer system in which two thermal heads printing print data on a front face and a back face of a thermal recording paper in which thermo-sensitive layers are formed on both sides are provided, and when these thermal heads are driven in accordance with the print data, temperatures of these thermal heads are sensed in order to vary print densities of the data to be printed, and ON/OFF times for electrical connections are controlled with respect to heater elements of the respective thermal heads, and to a control method thereof.
    Type: Application
    Filed: March 5, 2007
    Publication date: November 29, 2007
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Satoshi Yamada, Hiroyuki Taguchi
  • Patent number: 7283146
    Abstract: Systems and methods for providing thermal printhead thermal history temperature management by preprocessing target images are described. In one example, a thermal compensation process is applied to a target image to provide offset values in order to create a compensated image that is later printed without local printhead thermal compensation.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: October 16, 2007
    Assignee: Pitney Bowes Inc.
    Inventor: David L. Rich
  • Patent number: 7180533
    Abstract: An image processing apparatus, comprising: an exposing device for exposing an image forming material so as to form a latent image on the image forming material based on image data; a developing device for developing and visualizing the latent image on the exposed image forming material so as to form an image; a measuring device for measuring the image density of the image on the developed image forming material; a calibrating device for forming a table to define a relation between an image signal and image density on the basis of plural different test image data and measured-image densities thereof; a storing device for storing a characteristic change model indicating a characteristic change of at least one of the exposing device and the developing device with time; a difference calculating device to calculate a density difference on the basis of the characteristic change model between the time of forming the table and the time of forming an image based on image signal of diagnostic image data; and a correcti
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: February 20, 2007
    Assignee: Konica Minolta Holdings Inc.
    Inventors: Youichi Ono, Masaya Shimoji
  • Patent number: 7023461
    Abstract: The present invention relates to a method for reducing or eliminating cross-talk when operating a thermal print head for printing one line on a recording medium. Energizable heater elements of a thermal print head are drivable with at least one activation pulse for supplying a controllable amount of heat to the heater elements to generate a graphical output level of pixel areas on thermographic material. According to the method a plurality of subsets of the heater elements are sequentially driven to print pixel areas in each line. The cross-talk between pixel areas printed by heater elements in the same and/or different subsets is reduced by calculating a value relating to heat supplied to an nth heater element in accordance with a predetermined relationship relating the effect of heat from any one heater element after activation thereof on the graphical output of neighboring heater elements in the same and/or a different subset, and by driving the nth heater element in accordance with the calculated value.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: April 4, 2006
    Assignee: Agfa-Gevaert
    Inventor: Dirk Verdyck
  • Patent number: 6897887
    Abstract: A memory stores printing data. A CPU reads, from the memory, printing data on a target line to be printed subsequently and printing data on a plurality of immediately preceding lines, performs an arithmetic operation with respect to the read printing data to determine a history pattern, stores the determined history pattern in the memory, reads, from the memory, the history pattern of a history factor which is a dot exerting the influence of heat accumulation on a target dot to be printed subsequently, transmits the read history pattern to a thermal print head interface unit, and transmits a history timer value preliminarily allocated to the history factor to the thermal print head interface unit. The thermal print head interface unit drives a thermal print head based on the history pattern and on the history timer value.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: May 24, 2005
    Assignee: NEC Infrontia Corporation
    Inventors: Takeo Miyajima, Kei Suzuki
  • Patent number: 6819347
    Abstract: A model of a thermal print head is provided that models the thermal response of thermal print head elements to the provision of energy to the print head elements over time. The thermal print head model generates predictions of the temperature of each of the thermal print head elements at the beginning of each print head cycle based on: (1) the current ambient temperature of the thermal print head, (2) the thermal history of the print head, and (3) the energy history of the print head. The amount of energy to provide to each of the print head elements during a print head cycle to produce a spot having the desired density is calculated based on: (1) the desired density to be produced by the print head element during the print head cycle, and (2) the predicted temperature of the print head element at the beginning of the print head cycle.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: November 16, 2004
    Assignee: Polaroid Corporation
    Inventors: Suhail S. Saquib, William T. Vetterling
  • Patent number: 6784909
    Abstract: The present invention provides a dot history compensation system for varying the drive current to the points of a thermal print head in response to the printing history of the points. One or two previous print lines may be examined. In addition, the history of points adjacent to a selected point may be used to compute a head drive signal. The inventive system is implemented in an auxiliary control device within a thermal printer. In addition, an end point compensation system is provided to ensure that end points of a thermal print head receive equivalent amounts of energy to central points, even when a large number of points may be simultaneously fired. The inventive system is adapted for operation with both single color and multiple color thermal printers. The auxiliary control device also manages paper movement functions, thus freeing the main microprocessor for communications and other duties within the printer.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: August 31, 2004
    Assignee: Axiohm Transaction Solutions, Inc.
    Inventor: Steven Spano
  • Publication number: 20040119806
    Abstract: A memory stores printing data. A CPU reads, from the memory, printing data on a target line to be printed subsequently and printing data on a plurality of immediately preceding lines, performs an arithmetic operation with respect to the read printing data to determine a history pattern, stores the determined history pattern in the memory, reads, from the memory, the history pattern of a history factor which is a dot exerting the influence of heat accumulation on a target dot to be printed subsequently, transmits the read history pattern to a thermal print head interface unit, and transmits a history timer value preliminarily allocated to the history factor to the thermal print head interface unit. The thermal print head interface unit drives a thermal print head based on the history pattern and on the history timer value.
    Type: Application
    Filed: July 22, 2003
    Publication date: June 24, 2004
    Inventors: Takeo Miyajima, Kei Suzuki
  • Patent number: 6747683
    Abstract: A control method and apparatus for a thermal head capable of printing two colors applies thermal history control using a simple circuit configuration. The thermal head control apparatus has a print data processing unit 40 and a drive control circuit 50. The print data processing unit 40 has a first command processing function for converting first color data to a first and second stage energizing commands, a second command processing function for converting second color data to a second stage energizing command, a first line buffer 43 for storing first stage energizing commands, and a second line buffer 44 for recording second stage energizing commands. The print data processing unit 40 selectively outputs energizing commands from the first line buffer 43 and energizing commands from the second line buffer 44.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: June 8, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Satoshi Nakajima, Naohiko Koakutsu
  • Patent number: 6661532
    Abstract: A printer, which enables complicated printhead controls without a complicated logic circuit, includes a data table showing a control pattern of six controls stored in a RAM. When a drive trigger is inputted into a read-trigger generator, an address generator generates the address of the data table in the RAM as an address signal and inputs the address signal into the RAM. On the other hand, the read-trigger generator inputs a data-read trigger into the RAM. Control signals read by these signals are inputted into a head driver with heat pulses, which drives the printhead.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: December 9, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Umezawa, Hiroshi Fukui, Shinichi Omo, Akira Kuronuma, Takayuki Murata
  • Patent number: 6606108
    Abstract: A thermal printer head high-speed driving apparatus positioned between a microcomputer and a thermal printer head. The apparatus stores driving history information of thermal cells in the thermal printer head corresponding to a previous line and a line before last, the driving information of the current cell of a present line to be printed and driving information of adjacent thermal cells preceding and following of the current cell. Using the stored information the high-speed driving apparatus derives drive time data for controlling an on-time of the current cell, thereby individually controlling each thermal cell of the thermal print head.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: August 12, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jung-Youg Lee
  • Patent number: 6533477
    Abstract: There is disclosed a thermosensitive line printer, wherein a heating element array of a thermal head is pressed on a thermosensitive recording paper at a distance L2 from a nipping position by a pair of conveyer rollers, and is driven to record an image frame line by line from a print starting end, as the recording paper is conveyed by the conveyer rollers in a direction from the thermal head to the conveyer rollers. Based on image data of an upper zone of an image frame that is to be recorded around the distance L2 from the print starting end if the image frame is recorded from its top side, an image analyzer calculates a first estimation value that represents conspicuousness of potential density deviation in the upper zone that could be caused by a thermal deformation of the thermosensitive recording paper at the print starting end if the image frame is recorded from the top side.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: March 18, 2003
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Hiroshi Fukuda
  • Patent number: 6494629
    Abstract: There is disclosed a data processing method for correcting heating data for a thermal head of a thermal printer, to eliminate influence of heat energy accumulated in first to Nth heat accumulating layers of the thermal head. Basic heating data of a subject line is corrected with first to Nth correction data obtained by multiplying first to Nth heat accumulation data by predetermined coefficients respectively. The heating elements are driven in accordance with the corrected heating data, to print the subject line. A drive voltage to be applied across heating elements of the thermal head is determined at the start of printing a frame of image, according to an environmental temperature around the thermal head and a head temperature measured through a thermistor mounted in the Nth heat accumulating layer of the thermal head. The Nth coefficient is calculated according to a formula that includes the head drive voltage as a parameter.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: December 17, 2002
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Hayashi, Hisashi Enomoto
  • Patent number: 6476839
    Abstract: The present invention provides in a line thermal printer for producing different colors in a print medium according to a level of heat energy applied to the print medium: storage buffers B1 to B4 having a plurality of areas for storing a line of print pixel data according to the number of plural heating elements for forming print pixels; a control circuit for identifying whether the printer is set to a monochrome mode or a multicolor mode; a CPU 21 for storing to the storage buffers B1 to B4 the next line of print pixel data to be printed and one or a plurality of lines of print pixel data printed immediately before (when the printer is set to the monochrome mode), and storing to the storage buffers B1 to B4 at least a next line of print pixel data of each color to be printed when the printer is set to the multicolor mode; and a drive data generator 22, 23 for outputting data determining the drive time of each drive circuit of the heating elements based on data stored in the storage buffers.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: November 5, 2002
    Assignee: Seiko Epson Corporation
    Inventors: Satoshi Nakajima, Satoru Imai
  • Publication number: 20020158958
    Abstract: The present invention provides a dot history compensation system for varying the drive current to the points of a thermal print head in response to the printing history of the points. One or two previous print lines may be examined. In addition, the history of points adjacent to a selected point may be used to compute a head drive signal. The inventive system is implemented in an auxiliary control device within a thermal printer. In addition, an end point compensation system is provided to ensure that end points of a thermal print head receive equivalent amounts of energy to central points, even when a large number of points may be simultaneously fired. The inventive system is adapted for operation with both single color and multiple color thermal printers. The auxiliary control device also manages paper movement functions, thus freeing the main microprocessor for communications and other duties within the printer.
    Type: Application
    Filed: April 26, 2002
    Publication date: October 31, 2002
    Inventor: Steven Spano
  • Patent number: 6433807
    Abstract: A method for use with an identification card printing system to improve contrast of an original image represented by an array of pixels each having a pixel level representing an intensity of the pixel includes a first step of selecting a pixel of the pixel array. Next, an adjusted pixel level is calculated for the selected pixel based upon its pixel level and at least one proximal pixel level defined as the pixel level of a pixel located proximate to the selected pixel. Finally, the selecting and calculating steps are repeated for substantially all of the pixels of the pixel array to form an adjusted pixel array that represents an adjusted image having greater contrast than the original image.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: August 13, 2002
    Assignee: Fargo Electronics, Inc.
    Inventors: Robert E. Francis, Gary M. Klinefelter
  • Patent number: 6404452
    Abstract: The present invention provides a dot history compensation system for varying the drive current to the points of a thermal print head in response to the printing history of the points. One or two previous print lines may be examined. In addition, the history of points adjacent to a selected point may be used to compute a head drive signal. The inventive system is implemented in an auxiliary control device within a thermal printer. In addition, an end point compensation system is provided to ensure that end points of a thermal print head receive equivalent amounts of energy to central points, even when a large number of points may be simultaneously fired. The inventive system is adapted for operation with both single color and multiple color thermal printers. The auxiliary control device also manages paper movement functions, thus freeing the main microprocessor for communications and other duties within the printer.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: June 11, 2002
    Assignee: Axiohm Transaction Solutions, Inc.
    Inventor: Steven Spano
  • Publication number: 20020021349
    Abstract: A thermal printer head high-speed driving apparatus positioned between a microcomputer and a thermal printer head. The apparatus stores driving history information of thermal cells in the thermal printer head corresponding to a previous line and a line before last, the driving information of the current cell of a present line to be printed and driving information of adjacent thermal cells preceding and following of the current cell. Using the stored information the high-speed driving apparatus derives drive time data for controlling an on-time of the current cell, thereby individually controlling each thermal cell of the thermal print head.
    Type: Application
    Filed: May 29, 2001
    Publication date: February 21, 2002
    Inventor: Jung-Youg Lee
  • Patent number: 6330012
    Abstract: An image forming system includes a thermal head having a linear array of a plurality of heater elements extending in a direction of the main scanning, and a head driver which drives the thermal head on the basis of image data to selectively operate the respective heater elements according to image data while the thermal head is being moved relative to a recording medium in a direction of the sub-scanning, thereby forming a copy of the image represented by the image data on the recording medium line by line. The heater elements are divided into a plurality of head blocks which are contiguous in the main scanning direction, and the head driver is provided with a plurality of head drive segments of the same number as the number of the head blocks. Image data consisting of a plurality of pieces of line image data is stored in a memory. Each line image data consists of a plurality of image data fractions which are of the same number as the number of the head drive segments.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: December 11, 2001
    Assignee: Riso Kagaku Corporation
    Inventor: Yukio Irie
  • Patent number: 6302509
    Abstract: In an ink-jet apparatus for forming images through use of an ink-jet head provided with a plurality of ink ejection heaters with respect to only one ejection orifice, an accurate estimation of temperature of the ink-jet head is made possible by controlling ink-ejection amount in a step-by-step manner. For this purpose, there is provided a device for counting frequency of use of the plurality of heaters within a predetermined period of time independently for each combination of the heaters for ejecting different amount of ink (in steps S1002, S1003), and a combining device for adding a correction value to each of the thus counted value on the basis of the heater driving condition, and converting the total value into the energy applied within a predetermined period (in steps S1008, S1004 and S1005). The estimation of temperature is performed by use of the thus obtained energy.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: October 16, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Osamu Iwasaki, Naoji Otsuka, Kiichiro Takahashi, Hitoshi Nishikori
  • Publication number: 20010028384
    Abstract: A thermal master making device and a thermal printer including the same are disclosed. A thermistor senses ambient temperature around a thermal head. A correcting device corrects the amount of heat to be generated by the thermal head, i.e., the duration of energization at least two times during a single master making operation. This configuration reduces a change in the perforation conditions of a thermosensitive medium ascribable to the heat accumulation characteristic of the head. The printer achieves high resolution, high-speed master making and space saving.
    Type: Application
    Filed: February 2, 2001
    Publication date: October 11, 2001
    Applicant: Tohoku Ricoh Co., Ltd.
    Inventors: Yasunobu Kidoura, Satoshi Katoh, Yasumitsu Yokoyama, Yoshiyuki Shishido
  • Patent number: 6186683
    Abstract: In a heat transfer recording apparatus for printing images on recording paper by bringing ink film in contact with recording paper and heating them by means of a thermal head, the preheating time of the thermal head is decided based on the thermal head temperature detected by a thermistor and the accumulated power supply time obtained as a product of the number of times power is supplied to the thermal head and the detection interval, thus to achieve a uniform image quality by eliminating the effect of the thermal head heat accumulation even in case of forming multiple images successively on multiple sheets of recording paper.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: February 13, 2001
    Assignee: Minolta Co., Ltd.
    Inventor: Takashi Shibuki
  • Patent number: 6145951
    Abstract: An apparatus and method for correcting printing characteristics of a full-line printhead, and producing a high-printing quality printhead at high manufacturing yield, a corrected printhead by this apparatus, and a printer employing this printhead are disclosed. According to this method, an image is printed on a printing medium by using double pulses obtained based on fluctuation of resistance of each printing unit of a printhead, and a reference OD value is determined from an OD value histogram of the printed image. A preheating pulse width is selected, based on OD values of n printed images obtained by changing the preheating pulse width n times and the reference OD value, such that an OD value on each printing element is equal or close to the reference OD value. For example, assuming that the reference value is 0.43, a preheating pulse width on printing element No. 3 is 0.875.mu. sec.
    Type: Grant
    Filed: February 21, 1996
    Date of Patent: November 14, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kimiyuki Hayasaki, Masaki Inaba
  • Patent number: 6116712
    Abstract: A method and apparatus for automatically compensating for thermal conditioning of an ink jet print head are provided. The method and apparatus monitor the time during which the print head experiences various temperatures. The driving voltage supplied to the ink jet transducer is adjusted over time to compensate for thermal conditioning of the print head.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: September 12, 2000
    Assignee: Xerox Corporation
    Inventors: Christopher J. Laharty, Michele L. Fingerson, Richard Schmachtenberg, III