CN207875160U - 热敏打印机和用于热敏打印机的控制系统 - Google Patents

热敏打印机和用于热敏打印机的控制系统 Download PDF

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CN207875160U
CN207875160U CN201720626015.8U CN201720626015U CN207875160U CN 207875160 U CN207875160 U CN 207875160U CN 201720626015 U CN201720626015 U CN 201720626015U CN 207875160 U CN207875160 U CN 207875160U
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temperature
thermal printer
printhead
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刘智勇
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Hand Held Products Inc
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Big Data O'neal Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/375—Protection arrangements against overheating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection
    • B41J2/36—Print density control
    • B41J2/365—Print density control by compensation for variation in temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection

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Abstract

本实用新型涉及一种热敏打印机和用于热敏打印机的控制系统。公开对热敏打印机的打印温度的控制。使用两个温度传感器来感测热敏打印头和打印介质周围的环境两者的温度。以此方式，可调节施加到热敏打印头的加热元件的能量以匹配取决于打印头温度和打印介质温度两者的理想打印温度。

Description

热敏打印机和用于热敏打印机的控制系统
技术领域
本实用新型涉及热敏打印机，并且更具体来说，涉及基于在热敏打印头处和远离热敏打印头处测量的温度来控制热敏打印头的加热。
背景技术
典型的热敏打印头使用与该热敏打印头集成在一起的温度传感器(例如，热敏电阻器)来测量打印头温度。使用该打印头温度来控制在打印期间施加到热敏打印头用于加热的能量。例如，当热敏打印头在打印期间变得热时，可以减少施加到热敏打印头的能量。然而，尤其在打印介质(例如，热敏纸)是冷的(例如，在寒冷环境中)的情况下，减少加热可能影响打印质量。
为确保高质量热敏打印，打印头的温度和环境的温度两者都应用于打印温度控制。以此方式，当打印头温度和环境温度偏离时，可以补偿热敏打印头的加热，以使打印质量不受损。
因此，存在对一种监测打印头温度和环境温度两者并且可在打印头温度和环境温度不同时调适其加热以维持打印质量的热敏打印机的需要。
实用新型内容
因此，在一个方面中，本实用新型包括一种热敏打印机。该热敏打印机包括热敏打印头，该热敏打印头具有靠近打印介质路径定位的加热元件阵列。还包括打印介质子系统作为该热敏打印机的一部分。打印介质路径包括用于保持打印介质的轴和用于远离轴并且沿着打印介质路径移动打印介质以使打印介质可以由加热元件阵列加热的移动机构。该热敏打印机还包括用于容纳/支撑热敏打印头和打印介质子系统的壳体和用于测量温度的两个传感器 (打印头传感器和环境传感器)。两个传感器都容纳在壳体中。第一传感器(例如，打印头传感器)邻近热敏打印头并测量打印头温度。第二传感器(例如，环境传感器)定位成与热敏打印头隔开并测量环境温度。也容纳在壳体中的处理器以通信方式联接到热敏打印头、打印头传感器和环境传感器。该处理器由软件配置成比较所述环境温度与所述打印头温度。该处理器被进一步配置成基于该比较计算温度值(例如，经补偿的温度)，并且使用该温度值控制加热元件阵列的加热。
在热敏打印机的示例性实施例中，对加热元件阵列的加热的控制包括调节施加到加热元件的能量以最小化经补偿的温度与设置点温度之间的差。在一个可能实施例中，设置点温度对应于打印介质子系统和打印介质的特性。例如，打印介质子系统和打印介质的特性包括打印介质沿着打印介质路径移动的速度和/或打印介质的热敏性。
在热敏打印机的另一示例性实施例中，环境传感器邻近所述轴定位。
在热敏打印机的另一示例性实施例中，环境温度近似为所述打印介质的温度。
在热敏打印机的另一示例性实施例中，打印介质是热敏纸。
在热敏打印机的另一示例性实施例中，打印头传感器和环境传感器是热敏电阻器。
在另一示例性实施例中，比较所述环境温度与所述打印头温度包括计算是所述环境温度与所述打印头温度之间的差的温度间隙。对于其中温度间隙低于温度间隙阈值的情况，处理器被配置成通过使用打印头温度作为经补偿的温度来计算经补偿的温度。对于其中(i)温度间隙高于温度间隙阈值并且(ii)环境温度大于打印头温度的情况，处理器被配置成通过向所述打印头温度加上补偿值来计算经补偿的温度。对于其中(i)温度间隙高于温度间隙阈值并且(ii)环境温度小于打印头温度的情况，处理器被配置成通过从所述打印头温度减去补偿值来计算经补偿的温度。
在另一方面中，本实用新型包括一种用于热敏打印机的打印温度控制系统。该系统包括安装在热敏打印机的打印头上的打印头传感器和远离打印头安装的环境传感器。该打印头传感器测量打印头温度，并且该环境传感器测量环境温度。该系统还包括以通信方式联接到打印头传感器和环境传感器的处理器。该处理器由软件配置成比较所述环境温度与所述打印头温度。基于该比较，处理器被配置成创建经补偿的温度，并且使用该经补偿的温度来调节施加到热敏打印机的打印头的能量。
在打印温度控制系统的示例性实施例中，环境温度与打印头温度的比较包括计算是所述环境温度与所述打印头温度之间的差的温度间隙。
在打印温度控制系统的一个可能实施例中，如果所述温度间隙低于温度间隙阈值，则经补偿的温度计算成等于打印头温度。
在打印温度控制系统的另一可能实施例中，如果所述温度间隙高于温度间隙阈值，则经补偿的温度计算成不等于打印头温度。对于其中(i)温度间隙高于阈值温度并且(ii)环境温度大于打印头温度的情况，则在一个可能实施例中，经补偿的温度计算成大于打印头温度。对于其中(i)温度间隙高于阈值温度并且(ii)环境温度小于打印头温度的情况，则在一个可能实施例中，经补偿的温度计算成小于打印头温度。
在另一方面中，本实用新型包括一种用于控制热敏打印头的打印温度的方法。该方法包括提供热敏打印机。该热敏打印机包括(i)用于加热热敏纸的热敏打印头，(ii)用于测量对应于打印头的温度的打印头温度的打印头热敏电阻，以及(iii)用于测量对应于热敏纸的温度的环境温度的环境热敏电阻。该方法还包括测量打印头温度和环境温度的步骤以及比较这两个温度以创建经补偿的温度的步骤。最后，该方法包括使用经补偿的温度控制热敏打印头的加热的步骤。
在该方法的一个可能实施例中，该方法还包括测量所述环境温度与所述打印头温度之间的差并确定环境温度是大于打印头温度还是小于打印头温度的步骤。
本实用新型还提供以下技术方案：
技术方案1：一种热敏打印机，其特征在于包括：
热敏打印头；
打印介质子系统，其包括用于保持打印介质的轴和用于沿着打印介质路径移动所述打印介质以使所述打印介质能由所述热敏打印头加热的移动机构；
壳体，其围绕所述热敏打印头和所述打印介质子系统；
第一传感器，其安装到所述热敏打印头以便感测打印头温度；
第二传感器，其定位在所述壳体内并且与所述热敏打印头隔开以便感测环境温度；以及处理器，其容纳在所述壳体中并且以通信方式联接到所述热敏打印头、所述第一传感器和所述第二传感器，其中所述处理器被配置成：
比较所述环境温度与所述打印头温度，
基于所述比较计算温度值，以及
使用所述温度值控制所述热敏打印头的加热。
技术方案2：根据技术方案1所述的热敏打印机，其特征在于，基于所述温度值的对所述热敏打印头的加热的控制包括调节施加到加热元件的能量以最小化所述温度值与设置点温度之间的差。
技术方案3：根据技术方案2所述的热敏打印机，其特征在于，所述设置点温度对应于所述打印介质子系统和/或所述打印介质的特性。
技术方案4：根据技术方案3所述的热敏打印机，其特征在于，所述打印介质子系统和/或所述打印介质的所述特性包括(i)所述打印介质沿着所述打印介质路径移动的速度和/或 (ii)所述打印介质的热敏性。
技术方案5：根据技术方案1所述的热敏打印机，其特征在于，所述第二传感器邻近所述轴定位。
技术方案6：根据技术方案1所述的热敏打印机，其特征在于，环境温度近似为所述打印介质的温度。
技术方案7：根据技术方案1所述的热敏打印机，其特征在于，所述打印介质是热敏纸。
技术方案8：根据技术方案1所述的热敏打印机，其特征在于，所述第一传感器和所述第二传感器是热敏电阻器。
技术方案9：根据技术方案1所述的热敏打印机，其特征在于，比较所述环境温度与所述打印头温度包括计算为所述环境温度与所述打印头温度之间的差的温度间隙。
技术方案10：根据技术方案9所述的热敏打印机，其特征在于，如果所述温度间隙低于温度间隙阈值，则所述处理器计算等于所述打印头温度的温度值。
技术方案11：根据技术方案9所述的热敏打印机，其特征在于，如果所述温度间隙高于温度间隙阈值并且所述环境温度大于所述打印头温度，则所述处理器通过向所述打印头温度加上补偿值来计算温度值。
技术方案12：根据技术方案9所述的热敏打印机，其特征在于，如果所述温度间隙高于温度间隙阈值并且所述环境温度小于所述打印头温度，则所述处理器通过从所述打印头温度减去补偿值来计算温度值。
技术方案13：一种用于热敏打印机的控制系统，其特征在于包括：
用于测量打印头温度的第一传感器；
用于测量环境温度的第二传感器；以及
以通信方式联接到所述第一传感器和所述第二传感器的处理器，其被配置成：
比较所述环境温度与所述打印头温度，
基于所述比较计算温度值，以及
使用所述温度值调节施加到所述热敏打印机的打印头的能量。
技术方案14：根据技术方案13所述的用于热敏打印机的控制系统，其特征在于，所述比较包括计算为所述环境温度与所述打印头温度之间的差的温度间隙。
技术方案15：根据技术方案14所述的用于热敏打印机的控制系统，其特征在于，如果所述温度间隙低于温度间隙阈值，则所述温度值计算成等于所述打印头温度。
技术方案16：根据技术方案14所述的用于热敏打印机的控制系统，其特征在于，如果所述温度间隙高于温度间隙阈值，则所述温度值计算成不等于所述打印头温度。
技术方案17：根据技术方案16所述的用于热敏打印机的控制系统，其特征在于，如果所述环境温度大于所述打印头温度，则所述温度值计算成大于所述打印头温度。
技术方案18：根据技术方案16所述的用于热敏打印机的控制系统，其特征在于，如果所述环境温度小于所述打印头温度，则所述温度值计算成小于所述打印头温度。
在以下具体实施方式及其附图内进一步解释前述示例性实用新型内容以及本实用新型的其它示例性目的和/或优点以及其实现方式。
附图说明
图1绘示根据本实用新型的示例性实施例的热敏打印头的侧视图。
图2绘示根据本实用新型的示例性实施例的热敏打印机的透视图，其中壳体的一部分被移除。
图3绘示根据本实用新型的示例性实施例的对热敏打印头的热控制的流程图。
图4绘示根据本实用新型的示例性实施例的用于控制热敏打印头的加热的方法的流程图。
具体实施方式
直接热敏打印(即，热敏打印)是其中通过选择性地加热打印介质(例如，热敏纸)来产生打印标记的打印过程。当加热到高于热阈值时，涂覆打印介质的化学物质改变颜色以形成标记。为确保良好的打印质量，重要的是，将打印介质上的区域选择性地加热到高于热阈值，但不那么高以致相邻区域也改变颜色。
热敏打印机使用热敏打印头(即，打印头)用于加热。示例性热敏打印头在附图1(即，图1)中示出。热敏打印头1包括加热元件(即，点)阵列2。这些点可以按2D阵列或线性阵列(即，直线)布置，并且电流可以施加到每一点以产生热。通过使打印介质3 移动经过点2(即，沿着由图1中箭头所示的打印介质路径)，可以通过按对应于打印的行的图案选择性地加热这些点来在打印介质3上创建标记。以此方式，当打印介质移动经过加热元件2时，字母、数字和/或图像(例如，条形码)可以逐行地形成在打印介质上。
对于打印质量而言，控制加热元件的加热/冷却的定时以匹配打印介质3移动的速度很重要。对于打印质量而言，控制施加用于加热/冷却加热元件的能量也很重要。可通过使用散热器来冷却加热元件阵列2。散热器确保加热元件从一行打印到下一行被充分冷却。在一些情况下(例如，快速打印、重负荷打印、频繁打印、热环境等)，该散热器可能不充分冷却加热元件2。不是减慢或停止打印过程以冷却加热元件2，而是通常调节施加到加热元件的能量以补偿打印头温度的增加。因此，传感器(例如，热敏电阻器)通常邻近地附接到热敏打印头1(例如，与热敏打印头1集成在一起)以测量打印头温度。所测量的打印头温度可然后用作反馈以控制热敏打印头的加热。
热敏打印机可还包括用于保持/存储未使用的打印介质并且使打印介质移动经过热敏打印头并且移出热敏打印机的打印介质子系统。图2示出其中壳体的一部分被移除以示出打印介质子系统的热敏打印机6的透视图。该打印介质子系统可包括用于保持打印介质3的轴 (spool)(或轴杆)7。该打印介质子系统还包括用于远离轴7并且沿着打印介质路径移动打印介质的移动机构。移动机构可包括用于指引或拉紧打印介质的部件(例如，辊、拉紧器等)。这些部件可用马达(直接地或间接地)提供动力以对打印介质施加力(例如，摩擦力)并且沿着打印介质路径移动打印介质。通常包括压纸辊4以确保使打印介质3与加热元件阵列2紧密接近。压纸辊4可还有助于移动打印介质。
如上所述的，可控制施加到热敏打印头的加热元件的能量以防止过加热或欠加热打印介质。另外，对热敏打印头的加热的控制通常通过使用直接安装到热敏打印头的温度传感器(即，打印头传感器5)完成。然而，使用打印头传感器5本身无法解释打印介质的温度。
当热敏打印头的温度与打印介质的温度之间存在很大差(即，温度间隙)时，打印介质的温度可能影响打印质量。例如，如果打印头是热的并且打印介质是冷的，则减少对打印头的加热可能导致打印错误，这是因为冷打印介质可能需要相当大的能量来使打印介质的温度升高到高于打印所需的热阈值。同样地，如果打印介质是热的并且打印头是冷的，则增加对打印头的加热可能导致打印错误，这是因为施加到热打印介质的额外能量可能导致不想要的标记、模糊字符和/或阴影(shading)。
为解决所述问题，额外的温度传感器(即，环境传感器8)可定位在热敏打印机的壳体内以测量紧密对应于打印介质温度的环境温度。环境传感器8通常定位成邻近打印介质2(例如，距轴7间隔小于2.5厘米)并且与热敏打印头1隔开(例如，间隔大于2.5厘米)，以使打印头的温度并不实质上影响所测量的环境温度。以此方式，所测量的环境温度近似为打印介质的温度(例如，±2.5摄氏度)。
本实用新型包括使用两个温度传感器：邻近于热敏打印头1以监测热敏打印头的温度的打印头传感器5，和远离热敏打印头1定位以监测环境的温度(即，打印介质的近似温度)的环境传感器8。以此方式，可调节对用于打印的热敏打印头的加热的控制以补偿这两个感测温度之间的差(即，间隙)。
图3中示出本实用新型所包括的示例性热(即，打印温度)控制系统的流程图。基于打印条件建立设置点温度10。一些打印条件包括(但不限于)打印介质沿着打印介质路径移动的速度(即，打印速度)、打印介质的类型、打印介质的灵敏度(即，热阈值)、散热器性质和点电阻。该设置点温度可以基于储存器(例如，在制造期间)或基于由用户调节的设置来存储。处理器11将感测温度与(例如，从存储器调用的)设置点温度10进行比较，并且然后基于该比较，调节施加到热敏打印头1(即，热敏打印头的加热元件)的能量(例如，电流、占空比等)以最小化任何差。通常，该感测温度是打印头温度，但如图3中所示的，本实用新型包括创建经补偿的温度12用于反馈。该经补偿的温度补偿打印头温度13与环境温度14之间的差，其否则将会导致打印错误(即，低质量打印)。
图4绘示用于使用经补偿的温度控制热敏打印头的加热的方法的流程图。采用打印头传感器测量热敏打印头的温度20，并且采用环境传感器测量环境的温度25。处理器(由软件配置)然后基于打印头温度与环境温度之间的差计算温度间隙。处理器将该温度间隙与温度间隙阈值(例如，10摄氏度)进行比较30。如果该温度间隙并不超过该阈值(即，打印头温度和打印介质温度类似)，则可以使用打印头温度作为反馈来控制热敏打印头的加热35。换句话说，创建等于打印头温度的经补偿的温度。然而，如果温度间隙阈值被超过，则处理器将打印头温度与环境温度进行比较以确定哪一温度更高40。如果环境温度大于打印头温度，则处理器计算大于打印头温度的经补偿的温度45。如果环境温度小于打印头温度，则处理器计算小于打印头温度的经补偿的温度50。使用经补偿的温度作为反馈来控制打印头的加热元件的加热55。
经补偿的温度的计算可包括向打印头温度加上或减去补偿值。该补偿值可以不等于温度间隙，但通常，该补偿值具有对应于该温度间隙的量值。
如图3中示出的，当经补偿的温度12小于设置点温度10时，更多加热施加到热敏打印头的加热元件。替代地，当经补偿的温度12大于设置点温度10时，较少加热施加到热敏打印头的加热元件。
虽然已示出经补偿的温度以促进热控制，但还可使用经补偿的温度来控制影响打印质量的其它特性。这些其它特性可包括(但不限于)打印速度、打印头压力和/或设置点温度。另外，对大温度间隙的检测可指示热敏打印机具有问题。在此情况下，处理器可被配置成发起其它动作。这些动作可包括(但不限于)生成错误消息、生成诊断消息和/或停止打印过程。
在本说明书和/或附图中，已经公开本实用新型的典型实施例。本实用新型并不限于这样的示例性实施例。术语“和/或”的使用包括相关联所列举项中的一者或多者的任何和所有组合。附图是示意性表示，并且因此未必按比例绘制。除非另有说明，否则具体术语已经按通用和描述性意义而非出于限制目的使用。

Claims (20)

1.一种热敏打印机，其特征在于，其包括：
热敏打印头；
打印介质子系统，其包括用于保持打印介质的轴和用于沿着打印介质路径移动所述打印介质以使所述打印介质能由所述热敏打印头加热的移动机构；
壳体，其围绕所述热敏打印头和所述打印介质子系统；
第一传感器，其安装到所述热敏打印头以便感测打印头温度；
第二传感器，其定位在所述壳体内并且与所述热敏打印头隔开以便感测环境温度；以及
处理器，其容纳在所述壳体中并且以通信方式联接到所述热敏打印头、所述第一传感器和所述第二传感器，其中所述处理器被配置成：
比较所述环境温度与所述打印头温度，
基于所述比较计算温度值，以及
使用所述温度值控制所述热敏打印头的加热。
2.根据权利要求1所述的热敏打印机，其特征在于，基于所述温度值的对所述热敏打印头的加热的控制包括调节施加到加热元件的能量以最小化所述温度值与设置点温度之间的差。
3.根据权利要求2所述的热敏打印机，其特征在于，所述设置点温度对应于所述打印介质子系统和/或所述打印介质的特性。
4.根据权利要求3所述的热敏打印机，其特征在于，所述打印介质子系统和/或所述打印介质的所述特性包括所述打印介质沿着所述打印介质路径移动的速度。
5.根据权利要求3所述的热敏打印机，其特征在于，所述打印介质子系统和/或所述打印介质的所述特性包括所述打印介质的热敏性。
6.根据权利要求3所述的热敏打印机，其特征在于，所述打印介质子系统和/或所述打印介质的所述特性包括所述打印介质沿着所述打印介质路径移动的速度和所述打印介质的热敏性。
7.根据权利要求1所述的热敏打印机，其特征在于，所述第二传感器邻近所述轴定位。
8.根据权利要求1所述的热敏打印机，其特征在于，环境温度近似为所述打印介质的温度。
9.根据权利要求1所述的热敏打印机，其特征在于，所述打印介质是热敏纸。
10.根据权利要求1所述的热敏打印机，其特征在于，所述第一传感器和所述第二传感器是热敏电阻器。
11.根据权利要求1所述的热敏打印机，其特征在于，比较所述环境温度与所述打印头温度包括计算为所述环境温度与所述打印头温度之间的差的温度间隙。
12.根据权利要求11所述的热敏打印机，其特征在于，如果所述温度间隙低于温度间隙阈值，则所述处理器计算等于所述打印头温度的温度值。
13.根据权利要求11所述的热敏打印机，其特征在于，如果所述温度间隙高于温度间隙阈值并且所述环境温度大于所述打印头温度，则所述处理器通过向所述打印头温度加上补偿值来计算温度值。
14.根据权利要求11所述的热敏打印机，其特征在于，如果所述温度间隙高于温度间隙阈值并且所述环境温度小于所述打印头温度，则所述处理器通过从所述打印头温度减去补偿值来计算温度值。
15.一种用于热敏打印机的控制系统，其特征在于，其包括：
用于测量打印头温度的第一传感器；
用于测量环境温度的第二传感器；以及
以通信方式联接到所述第一传感器和所述第二传感器的处理器，其被配置成：
比较所述环境温度与所述打印头温度，
基于所述比较计算温度值，以及
使用所述温度值调节施加到所述热敏打印机的打印头的能量。
16.根据权利要求15所述的用于热敏打印机的控制系统，其特征在于，所述比较包括计算为所述环境温度与所述打印头温度之间的差的温度间隙。
17.根据权利要求16所述的用于热敏打印机的控制系统，其特征在于，如果所述温度间隙低于温度间隙阈值，则所述温度值计算成等于所述打印头温度。
18.根据权利要求16所述的用于热敏打印机的控制系统，其特征在于，如果所述温度间隙高于温度间隙阈值，则所述温度值计算成不等于所述打印头温度。
19.根据权利要求18所述的用于热敏打印机的控制系统，其特征在于，如果所述环境温度大于所述打印头温度，则所述温度值计算成大于所述打印头温度。
20.根据权利要求18所述的用于热敏打印机的控制系统，其特征在于，如果所述环境温度小于所述打印头温度，则所述温度值计算成小于所述打印头温度。
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US10183500B2 (en) 2019-01-22

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