Abstract: A printing device is configured to print a multi-layer thermal printing medium. The printing device includes a thermal head and a controller. The thermal head has a heat generating elements configured to form images on a heat sensitive multi-layer. The controller is configured to perform detecting whether a viewing direction of the heat sensitive multi-layer is a thickness direction to view from a second surface toward a first surface or a direction opposite the thickness direction to view from the first surface toward the second surface. The controller is configured to further perform creating print data to be applied to each of the heat generating elements. The created print data is such that color development states of a first color and a second color according to the detected viewing direction are differentiated from color development states of the first color and the second color according to an undetected viewing direction.

Abstract: A print control device includes a storage unit storing a color conversion LUT used for color conversion, a print data generating unit, and a print control unit. The color conversion LUT defines a correspondence relationship between color information of the ink color space, and a combination of temperature information indicating a temperature of the printing medium in the printing unit and color information of an input color space. The print data generating unit generates the print data by referring to the color conversion LUT to convert a combination of the input image data represented by the input color space and the temperature information input from the printing unit. The print control unit causes at least part of the printing by the printing unit to be executed in parallel with the generation of the print data by the print data generating unit.

Abstract: Provided is a head-up display in which the characteristics for dissipating heat generated by a light source are excellent. This head-up display emits display light of a display image projected by a display device to a transmission/reflection part of the vehicle to allow a viewer to see a virtual image of the display image. The display device comprises: a substrate that has a quadrilateral heat dissipation plate having corners; and a quadrilateral light source that is provided on the heat dissipation plate, and that has corners. The heat dissipation plate is disposed such that the corners of the heat dissipation plate 61 are rotated relative to the corners of the light source.

Abstract: A printing apparatus includes: a main-body having a space therein; a thermal head arranged on a substrate provided in the space, the thermal head having heating elements arranged along a predetermined arrangement direction; a conveyor which conveys a thermal paper along a conveyance path provided in the space and intersecting with the arrangement direction; a first temperature sensor provided in a first space in the space on a side of the thermal head with respect to the conveyance path; a second temperature sensor provided in a second space in the space on a side opposite to the thermal head with respect to the conveyance path; and a processor configured to: correct an amount of applying energy to be applied to the heating elements, based on first and second temperatures detected by the first and second temperature sensors; and apply corrected amount of the applying energy selectively to the heating elements.

Abstract: A temperature control method of printing and a device thereof are provided, wherein the method and the device is adapted to a 3D printer which has a discharge nozzle. The control method includes the following steps. A temperature rule table is provided, and the temperature rule table is formed by a printing speed parameter and a discharge speed parameter of the 3D printer. At least one printing speed information and at least one discharge speed information are received. Corresponding temperature information is obtained from the temperature rule table according to the printing speed information and the discharge speed information. Further, a temperature of the discharge nozzle is adjusted according to the printing speed information, the discharge speed and the at least one temperature information.

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.

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.

Abstract: In one embodiment, a method for preventing hammer coils of a line printer hammer bank from overheating during printing includes establishing the maximum allowable temperature threshold of any given hammer coil, monitoring the temperature of all hammer coils during printing, keeping a moving average of dots printed per unit time on each hammer coil, and if one or more coils reach a temperature higher than the threshold, determining the current maximum dot-per-hammer density that the hot coils can print per stroke of the hammer bank that will enable them to cool down adequately from their current temperatures. The rate of printing is restricted to this current established maximum dot-per-hammer density on only those coils which have a temperature at or above the maximum allowable temperature, minus a suitable hysteresis.

Abstract: In a printing control apparatus, there are arranged one pulse application period of which from-start-to-end is series of sub-pulse application time, main-pulse application time and non-heating time and other pulse application periods which follow the one pulse application period and of which from-start-to-end is repeated series of main-pulse application times and non-heating times. As temperature is higher, proportion of applied-for-sub-pulse energy amount to total energy amount in one pulse application period is made larger. As temperature is higher, proportion of applied-for-main-pulse energy amount to total energy amount in other pulse application periods that follow one pulse application period is made smaller.

Abstract: A thermal printer having a thermal head with a heat element that heats a recording medium and forms a print dot by energizing the heat element generates a first energizing pulse that energizes continuously during a first period for forming a print dot when the recording medium conveyance speed is greater than a specific threshold value; and generates a second energizing pulse that alternates during the first period between energizing for a second period that is shorter than the first period and de-energizing for a third period when the recording medium conveyance speed is less than or equal to the threshold value.

Abstract: A printer has a heat source disposed adjacent a temperature sensor to transfer heat upon activation across a portion of an introduced print media to the temperature sensor and a controller to receive a signal from the temperature sensor and to obtain a temperature signature generally identifying attributes of the introduced print media and to adjust print head settings in response to the identified attributes. The printer may further comprise a sensor to detect access to a print media storage compartment and to initiate examination of the heat transfer properties of the introduced print media upon detecting that the print storage compartment has been accessed.

Abstract: In a printing control apparatus, there are arranged one pulse application period of which from-start-to-end is series of sub-pulse application time, main-pulse application time and non-heating time and other pulse application periods which follow the one pulse application period and of which from-start-to-end is repeated series of main-pulse application times and non-heating times. As temperature is higher, proportion of applied-for-sub-pulse energy amount to total energy amount in one pulse application period is made larger. As temperature is higher, proportion of applied-for-main-pulse energy amount to total energy amount in other pulse application periods that follow one pulse application period is made smaller.

Abstract: What is disclosed is a novel system and method for implementing a color model function for a printer that uses a relatively large number of colorants. The model is based upon several four color printer color models that contain more complete color models by storing output data for a higher number of input color value combinations and a small number of additional measurements that characterize the response of the printer to outputs using more than four colorants. Results from more complete printer models are determined and combined with a CMYKOV printer model that stores output values for only a coarse resolution of inputs. Transitions between various regions of color space defined by the colorant model definitions are then smoothed. A higher dimension printer color model output is produced. The present method effectively determines a higher dimension color printer model output corresponding to values of an N+2 dimension color model input.

Abstract: According to one embodiment, a label printing device includes an image rendering unit configured to render a label image on a recording medium. The label printing device further includes a control unit configured to set an operation mode to one of a first operation mode, in which printing is performed while keeping a print speed constant, and a second operation mode, in which printing is performed while keeping a print concentration constant, and further configured to control the image rendering unit to render the label image in the selected mode.

Abstract: A thermal printer having a thermal head with a heat element that heats a recording medium and forms a print dot by energizing the heat element generates a first energizing pulse that energizes continuously during a first period for forming a print dot when the recording medium conveyance speed is greater than a specific threshold value; and generates a second energizing pulse that alternates during the first period between energizing for a second period that is shorter than the first period and de-energizing for a third period when the recording medium conveyance speed is less than or equal to the threshold value.

Abstract: A thermal processor including an oven and a cooling section. The oven is configured to heat an imaging media to a development temperature. The cooling section is configured to cool the imaging media from the development temperature to a desired exit temperature as imaging media moves along a transport path from an entrance to an exit. The cooling section provides a varying rate of heat transfer from the imaging media along the transport path so as to create a varying cooling temperature gradient in the imaging media substantially equal to and not exceeding a varying maximum cooling temperature gradient of imaging media.

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.

Abstract: The input energies provided to a print head of a thermal printer are adjusted based on the temperature of a platen in the thermal printer. The platen temperature may be measured by a sensor or predicted by a platen temperature model. Such a model may derive the predicted platen temperature from an observed temperature of a heat sink in the thermal printer. A thermal history control algorithm may use the platen temperature, whether actual or predicted, to compensate for the platen temperature by adjusting the input energies.

Abstract: The input energies provided to a print head of a thermal printer are adjusted based on the temperature of a platen in the thermal printer. The platen temperature may be measured by a sensor or predicted by a platen temperature model. Such a model may derive the predicted platen temperature from an observed temperature of a heat sink in the thermal printer. A thermal history control algorithm may use the platen temperature, whether actual or predicted, to compensate for the platen temperature by adjusting the input energies.

Abstract: An image forming apparatus has: an ejection head which ejects droplets of liquid toward a recording medium in accordance with image data; a hold device which holds the recording medium; a conveyance device which conveys the recording medium relatively to the ejection head while the recording medium is held by the hold device; a heating device which is provided with the hold device and is capable of heating a part of the recording medium selectively; and a control device which controls the heating device in accordance with the image data so that, before the droplets of the liquid are ejected by the ejection head, the recording medium is heated by the heating device in accordance with a heating pattern in which a first temperature not greater than an allowable temperature of the recording medium is set for a first region of the recording medium where a liquid ejection rate is not less than a first threshold value while a second temperature less than the first temperature is set for a second region of the record

Abstract: A thermal processor including an oven and a cooling section. The oven is configured to heat an imaging media to a development temperature. The cooling section is configured to cool the imaging media from the development temperature to a desired exit temperature as imaging media moves along a transport path from an entrance to an exit. The cooling section provides a varying rate of heat transfer from the imaging media along the transport path so as to create a varying cooling temperature gradient in the imaging media substantially equal to and not exceeding a varying maximum cooling temperature gradient of imaging media.

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 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, (2) the predicted temperature of the print head element at the beginning of the print head cycle, (3) the ambient printer temperature at the beginning of the print head cycle, and (4) the ambient relative humidity.

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.

Abstract: The thermal printer of the present invention is a thermal printer for printing on a print medium by thermally transferring an ink ribbon by means of a thermal head, wherein the thermal printer comprises a density controller for keeping the print density of the thermal head low in low-temperature control for raising the print density at low temperatures. The density controller comprises a density calculator for calculating a density evaluation value by finding an average gradation value of print data for each of a plurality of dots included in the predetermined region, a comparator for comparing the calculated density evaluation value with a predetermined value, and an adjuster for adjusting, on the basis of this comparison result, the print density in driving and printing with the thermal head to a low value for print data of high gradation exceeding a predetermined gradation value in print data on a printed line when the density evaluation value exceeds a predetermined value.

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.

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.

Abstract: An image forming apparatus includes a control unit for controlling a plurality of fixing units independently of one another regardless of a state of an image forming unit, and a receiving unit for receiving image forming requests, and has a control sequence, in which when not all of a recording medium material, a recording medium state, environment, and image data satisfy predetermined conditions, at least one of the plurality of fixing units are caused to operate, and a control sequence, in which when it is detected that an image forming request, for which all of the plurality of fixing units are required, is received by the receiving unit, each currently unused fixing unit is caused to operate. Accordingly, it is possible to realize high productivity even when there exist fixing units not driven due to the recording medium physical properties, recording medium state, environment, image data, or the like.

Abstract: The thermal printer of the present invention is a thermal printer for printing on a print medium by thermally transferring an ink ribbon by means of a thermal head, wherein the thermal printer comprises a density controller for keeping the print density of the thermal head low in low-temperature control for raising the print density at low temperatures. The density controller comprises a density calculator for calculating a density evaluation value by finding an average gradation value of print data for each of a plurality of dots included in the predetermined region, a comparator for comparing the calculated density evaluation value with a predetermined value, and an adjuster for adjusting, on the basis of this comparison result, the print density in driving and printing with the thermal head to a low value for print data of high gradation exceeding a predetermined gradation value in print data on a printed line when the density evaluation value exceeds a predetermined value.

Abstract: A printer device that prints an image to a printing paper using a thermal head formed with a plurality of heating resistors. The printer device includes: edge position detection means for performing edge position detection to an incoming printing paper using the thermal head based on a change of temperature increase observed in, as a result of energization, any of the heating resistors opposing the printing paper and the remaining heating resistors not opposing the printing paper; and control means for exercising control over an image printing operation using the thermal head based on a detection output derived by the edge position detection means.

Abstract: An objective of this invention is to suppress an increase in power consumption and reduce ink density unevenness caused by variations in the amount of ink discharge upon performing printhead temperature retaining control. To achieve this objective, a printing apparatus according to the invention which prints on a print medium by scanning a printhead with a printing element for generating thermal energy has the following arrangement. That is, the printing apparatus includes a determination unit which predicts a maximum temperature which the printhead reaches in printing, and determines a target temperature based on the predicted maximum temperature, and an adjustment unit which adjusts the temperature of the printhead in printing to the target temperature.

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.

Abstract: A thermal printer performs printing on a paper based on printing density data input. The thermal printer includes a thermal head having at least one heating element; a temperature detector which detects a temperature of the thermal head; and a control part which is connected to the thermal head and the temperature detector, receives the printing density data, and controls an amount of energy to be supplied to the heating element based on the printing density data. The control part stores therein a printing density-energy supply amount table which sets forth an amount of energy to be supplied to the heating element to perform printing with certain printing densities at certain head temperatures. The printing density-energy supply amount table sets forth that the amount of energy to be supplied is greater than zero at the printing density of zero if the head temperature is lower than a predetermined temperature.

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.

Abstract: A printer that applies donor material from donor patches on a donor web to a receiver medium using a thermal printhead that generates heat and a method for operating such a printer are provided. The method comprises the steps of: receiving a print order requesting the printing of a quantity of images; determining a temperature of the printhead; printing a designated number of the quantity of the images in a sequence; determining a length of time of a programmed delay; delaying the printing for the determined length of time of the programmed delay; and printing remaining images from the quantity of images. The length of each programmed delay is determined by using the temperature of the printhead and a time rate of cooling of the printhead and, is determined in a manner that provides a sufficient cooling time to prevent the printhead from reaching a maximum printhead temperature during printing.

Abstract: In a color thermal printer, a thermal head has an array of heating elements, arranged in a main scan direction, for thermal recording to respectively pixels on thermosensitive recording material. The recording material is moved relative to the thermal head in a sub scan direction crosswise to the main scan direction, to record an image to the recording material according to image data. The recording material includes two lateral edges, opposed to each other, for extending in the sub scan direction. In the thermal printer, the image is recorded in a region extending to the two lateral edges on the recording material according to the image data. Density of two edge portions of the image disposed along the two lateral edges are lowered by processing the image data, to prevent occurrence of scorch on the two lateral edges.

Abstract: A printing system according to the present invention includes a media terminal box which may be installed on a street. In the box, there are disposed a measuring device that measures the temperature or humidity in the box, a device such as a CPU, and a storage device. The storage device stores correction data including a correction value based on a combination of the temperature and humidity, and history data relating to the temperature and humidity measured by the measuring device. The control device corrects a color tone of image data which is read out from the storage device based on the temperature/humidity history data and the correction data so as to generate corrected image data. The corrected image data is sent to a printer, and then the printer is operated based on the corrected image data.

Abstract: Techniques are disclosed for performing thermal history control 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 subintervals, which may be of unequal duration. Each sub-interval 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 subintervals. For example, although a single thermal model may be used to predict the temperature of the print head elements in each of the subintervals, different parameters may be used in the different subintervals. Similarly, different energy computation functions may be used to compute the energy to be provided to the print head in each of the subintervals based on the predicted print head temperature.

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 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, (2) the predicted temperature of the print head element at the beginning of the print head cycle, (3) the ambient printer temperature at the beginning of the print head cycle, and (4) the ambient relative humidity.

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.

Abstract: A printer device that prints an image to a printing paper using a thermal head formed with a plurality of heating resistors. The printer device includes: edge position detection means for performing edge position detection to an incoming printing paper using the thermal head based on a change of temperature increase observed in, as a result of energization, any of the heating resistors opposing the printing paper and the remaining heating resistors not opposing the printing paper; and control means for exercising control over an image printing operation using the thermal head based on a detection output derived by the edge position detection means.

Abstract: A printing apparatus including a thermal head, a measurement device that measures a temperature of the thermal head and a controller. The controller controls a printing speed on the basis of the measured temperature as measured by the measurement device, determines whether the measured temperature of the thermal head is rising or dropping, compares a preliminarily determined first threshold value with the measured temperature when the temperature is rising, compares a preliminarily determined second threshold value with the measured temperature when the temperature is dropping, controls printing by reducing the printing speed when the measured temperature is greater than the first threshold value, and controls printing by raising the printing speed when the measured temperature is less than the second threshold value.

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.

Abstract: The present invention provides a printer in which a current is conducted to a thermal head 20 in order to pre-heat the thermal head 20 concurrently with battery checking prior to printing. Thereafter, power supplied from a battery is fed to the thermal head 20, which is a load, immediately before the color inks on an ink ribbon 7a are transferred. At the predetermined timing immediately succeeding the feeding of power (in 5 to 10 msec), a voltage developed from the battery 8 is detected. The detected voltage is corrected so that a printing density of inks transferred from the thermal head 20 will remain constant irrespective of whether the voltage developed from the battery 8 is high or low.

Abstract: A thermal developing apparatus having a recording section 16 for exposing a thermal developing photosensitive material or a photosensitive thermal recording material (hereinafter referred to as a “thermal developing recording material”) to form a latent image, a control section A for controlling the recording section 16, and a thermal developing section 18 for heating the thermal developing recording material by a heating member to carry out thermal development, comprising a sensor B1 for measuring the surface temperature of a presser roller of the thermal developing section 18 and a light amount correcting circuit A1 for correcting an amount of recording light of the thermal developing recording material based on the output of the sensor B1, the amount of light of the light amount correcting circuit A1 being corrected to reduce the amount of light when the surface temperature of the presser roller is raised.

Abstract: Diamonds are marked by applying apertured tapes bearing identifying indicia to the girdles, applying a flammable layer over the apertured tapes, and then igniting the flammable layer to burn the indicia into the girdles. Preferably, the flammable layer is prepackaged within the apertured tapes.

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.

Abstract: The invention provides a recording device capable of accurately detecting the temperature of a recording head that stops a recording operation at a maximum temperature regardless of the unevenness in the temperature characteristics of voltage drop in the forward direction of a first sensor. The invention has a driving circuit for driving a recording head. The temperature of the driving circuit is detected by the first sensor by utilizing the temperature characteristics of voltage drop in the forward direction of the first sensor. When a recording device is turned ON, a room temperature and an output voltage of the first sensor are stored in a memory. The invention also has a calculation unit that performs a calculation to obtain a voltage value that the first sensor will output at a predetermined maximum temperature, based on the room temperature and the output voltage stored in the memory.

Abstract: Apparatus herein provides for a chosen level of power dissipation of a resistor, for example, the heating element of a thermal head assembly. The resistance of the resistor changes upon a change in temperature thereof, for example, due to increased flow of current therethrough. The apparatus includes a resistive shunt in series with the resistor, a first differential amplifier, with voltage drop across the resistor being provided to first and second input terminals of the first differential amplifier, and a second differential amplifier, voltage drop across the shunt being provided to first and second input terminals of the second differential amplifier. The output signals from the first and second differential amplifiers are provided to a voltage multiplier. The output signal from the voltage multiplier is provided to an input terminal of a power operational amplifier, and a programming sequence voltage is supplied to another input terminal of the power operational amplifier.

Abstract: Printhead operating temperature control by sampling of the printhead's temperature in combination with an algorithm for estimating whether the printhead will exceed its maximum operating temperature during a scan across the media. If the estimation shows that the maximum operating temperature will be exceeded, the printing operation is halted (not aborted) at a convenient location in the scan. The unprinted data of that scan is preserved in memory, and the printhead is allowed to cool. The printhead is returned to the beginning of the scan during which the printing was halted, the scan is restarted, and the printhead is controlled to recommence firing ink drops at the location where the firing had been stopped in the previous scan.

Abstract: A thermal recording apparatus records information on a thermal recording sheet, the thermal recording sheet having a thermal characteristic by which the information is recorded through heating the thermal recording sheet to a first temperature and information which has been recorded on the thermal recording sheet is erased therefrom by heating the thermal recording sheet to a second temperature. The thermal recording apparatus includes, a thermal head for heating the thermal recording sheet in a pattern, a recording controller for driving the thermal head so that the thermal recording sheet is heated to the first temperature in a pattern corresponding to the information to be recorded, and an erasing controller for supplying thermal energy to the thermal recording sheet on which information has been recorded by using the thermal head so that the thermal recording sheet is heated to the second temperature.