CN103153627B - 具有循环泵的流体喷射组件 - Google Patents
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Abstract
一种流体喷射组件包括流体槽、再循环通道和在再循环通道内的滴液喷射元件。泵元件被配置用于经过再循环通道向和从流体槽泵送流体。与滴液喷射元件关联的第一可寻址驱动电路和与泵元件关联的第二可寻址驱动电路能够同时驱动滴液喷射元件和泵元件。
Description
背景技术
喷墨打印机中的流体喷射设备提供流体滴液(fluiddrops)的按需求滴液喷射。一般而言,喷墨打印机通过经过多个喷嘴向打印介质、诸如纸张上喷射墨滴来打印图像。通常以一个或者多个阵列来布置喷嘴,使得墨滴从喷嘴的恰当顺序喷射使字符或者其他图像随着打印头(printhead)和打印介质相对于彼此移动而打印在打印介质上。在具体示例中,热喷墨打印头通过经过加热元件传递电流以生成热并且在发射腔(firingchamber)内蒸发流体的小部分来从喷嘴喷射滴液。在另一示例中,压电喷墨打印头使用压电材料致动器以生成迫使墨滴离开喷嘴的压力脉冲。
虽然喷墨打印机以合理成本提供高打印质量,但是持续的改进依赖于克服在它们的发展中保持的各种挑战。例如在存储或者非使用时段期间,喷墨打印头中的喷嘴可能在孔区域中发展出外皮(crust)和/或粘性墨栓塞。在喷嘴孔区域中的粘性栓塞或者固体膜状外皮可能由于墨干燥和墨成分固结而形成。栓塞或者外皮防止滴液在喷嘴喷射元件被致动时发射(fire)。在喷墨打印机中继续不利地影响打印质量和成本的其他挑战包括打印头中的气泡管理和颜料墨载色剂分离(pigment-inkvehicleseparation)(PIVS),这可能引使墨流堵塞、由于流淌所致的墨泄漏、使部分全打印盒表现为空以及引起总体打印质量降级。
附图说明
现在参照以下附图通过示例描述本实施例,在附图中:
图1图示根据一个实施例的作为适合于合并流体喷射组件的喷墨打印系统而实现的流体喷射设备;
图2示出根据一个实施例的切过滴液生成器和出口通道的流体喷射组件的横截面图;
图3示出根据一个实施例的切过流体泵元件和入口通道的流体喷射组件的横截面图;
图4示出根据一个实施例的具有单个再循环通道和泵元件的流体喷射组件内的微再循环架构的部分俯视图;
图5示出根据一个实施例的具有单个泵元件和具有再循环通道的多个喷射元件的流体喷射组件内的微再循环架构的部分俯视图;
图6示出框图,该框图图示根据一个实施例的流体喷射组件的衬底上的附加集成电路;
图7示出框图,该框图图示根据一个实施例的流体喷射组件的衬底上的附加集成电路,该流体喷射组件具有支持每个单独泵元件的专用驱动电路。
具体实施方式
问题和解决方案的概述
如上文指出的那样,在喷墨打印系统的开发中仍然必须克服各种挑战。例如在这样的系统中使用的喷墨打印头继续有墨堵塞和/或阻塞的麻烦。墨堵塞和/或阻塞的原因包括在喷嘴孔区域中粘性栓塞和外皮的发展,这些栓塞和外皮例如在存储或者未使用时段期间由于墨干燥和墨成分固结而形成。其他原因包括打印头中的气泡和颜料墨载色剂分离(PIVS)。
对这样的问题的先前解决方案已经主要涉及到在使用打印头之前和之后维护它们。例如,通常在未使用期间遮盖(cap)打印头以防止喷嘴被干燥的墨阻塞。遮盖在打印头周围和在喷嘴中提供有利氛围,该氛围帮助防止墨变干燥,这减少喷嘴中的结外皮和墨栓塞形成的风险。在使用喷嘴之前也通过经过它们喷吐(spit)墨来灌注(prime)它们。喷吐是向维护站中的吐盂(spittoon)中喷射墨。喷吐帮助防止已经有一些时间未发射的喷嘴中的墨变干燥和结外皮。这些解决方案的缺点包括由于在打印机启动时防止立即打印的必要维护时间所致的打印延迟以及由于在维护期间消耗的大量墨所致的总拥有成本增加。
应对问题、诸如粘性墨栓塞、结外皮、气泡和PIVS的其他更新近方法涉及到通过片上(on-die)墨再循环对墨的微再循环。例如一种微再循环技术向喷嘴发射电阻器施加亚TOE(接通能量)脉冲以引起墨再循环而未发射(即未接通)喷嘴。这一技术具有包括向喷嘴层上搅拌(puddle)墨的风险的一些缺点。另一种微再循环技术包括片上墨再循环架构,这些架构实施辅助泵元件以通过墨再循环改进喷嘴可靠性。虽然这样的微再循环架构朝着改进喷墨打印头内的气泡管理和PIVS问题迈出一大步,但是在喷嘴孔区域中通常仍然存在在使用再循环架构时完全不受腔中的墨混合所影响的某一死体积(deadvolume)。因此,喷嘴孔区域中的粘性墨栓塞和/或结外皮问题可能持续。
本公开的实施例一般通过使用微再循环架构中的泵元件以向被从打印头喷嘴喷射的流体滴液提供能量提升来改进对粘性墨栓塞和结外皮问题的现有解决方案。能量提升增加滴液体积和速度,这帮助克服喷嘴孔区域中的粘性墨栓塞和/或结外皮。可控制激活滴液喷射元件和再循环泵元件相对于彼此的定序和定时以实现能量提升。为了粘性墨栓塞和外皮去除而相对于滴液喷射元件对微再循环泵元件的受控激活增强微再循环架构的现有功能,这包括防止颜料墨载色剂分离(PIVS)、气泡管理、改进的去遮盖时间以及在维护和灌注期间的减少的墨消耗。
在一个示例实施例中,一种流体喷射组件包括流体槽、再循环通道和在再循环通道内的滴液喷射元件。泵元件被配置用于经过再循环通道向和从流体槽泵送流体(例如,墨)。与滴液喷射元件关联的第一可寻址驱动电路和与泵元件关联的第二可寻址驱动电路能够同时驱动滴液喷射元件和泵元件。在另一实施例中,一种操作流体喷射组件的方法包括在流体喷射组件的流体再循环通道内激活滴液喷射元件以从滴液生成器喷射流体滴液并且通过激活泵元件来向流体滴液增加喷射能量。增加喷射能量包括先激活泵元件,并且然后在激活泵元件的可编程时间间隔内激活滴液喷射元件。在另一实施例中,流体喷射设备包括:流体喷射组件,具有在再循环通道内的滴液喷射元件和泵元件,电子控制器,以及滴液能量提升模块,可在电子控制器上执行以在激活泵元件的时间间隔内激活滴液喷射元件。
示例实施例
图1图示根据公开的一个实施例的作为适合于合并如这里公开的流体喷射组件的喷墨打印系统100而实现的流体喷射设备。在这一实施例中,公开流体喷射组件为流体滴液喷射打印头114。喷墨打印系统100包括喷墨打印头组件102、墨供应组件104、安装组件106、介质传送组件108、电子打印机控制器110和向喷墨打印系统100的各种电部件提供功率的至少一个电源112。喷墨打印头组件102包括经过多个孔口(orifice)或者喷嘴116朝着打印介质118喷射墨滴以便向打印介质118上打印的至少一个流体喷射组件114(打印头114)。打印介质118是任何类型的适当片或者卷材料,诸如纸、卡片材料(cardstock)、透明物、聚脂薄膜等。通常,以一个或者多个列或者阵列布置喷嘴116,使得墨从喷嘴116的恰当顺序喷射使字符、符号和/或其他图形或者图像随着喷墨打印头组件102和打印介质118相对于彼此移动而打印于打印介质118上。
墨供应组件104向打印头组件102供应流体墨并且包括用于存储墨的贮存器120。墨从贮存器120流向喷墨打印头组件102。墨供应组件104和喷墨打印头组件102可以形成单向墨递送系统或者宏再循环墨递送系统。在单向墨递送系统中,在打印期间消耗向喷墨打印头组件102供应的基本上所有墨。然而在宏再循环墨递送系统中,在打印期间仅消耗向打印头组件102供应的墨的一部分。向墨供应组件104返回在打印期间未消耗的墨。
在一个实施例中,喷墨打印头组件102和墨供应组件104一起容纳入喷墨盒或者笔中。在另一实施例中,墨供应组件104与喷墨打印头组件102分离并且经过接口连接、诸如供应管向喷墨打印头组件102供应墨。在两个之一的实施例中,可以去除、更换和/或再填充墨供应组件104的贮存器120。在一个实施例中,在喷墨打印头组件102和墨供应组件104一起容纳入喷墨盒中的情况下,贮存器120包括位于盒内的本地贮存器以及位置与该盒分离的更大贮存器。分离的更大贮存器用于再填充本地贮存器。因而可以去除、更换和/或再填充分离的更大贮存器和/或本地贮存器。
安装组件106使喷墨打印头组件102相对于介质传送组件108定位,并且介质传送组件108使打印介质118相对于喷墨打印头组件102定位。因此,在喷墨打印头组件102与打印介质118之间的区域中与喷嘴116相邻地限定打印区122。在一个实施例中,喷墨打印头组件102是扫描型打印头组件。这样,安装组件106包括用于相对于介质传送组件108移动喷墨打印头组件102以扫描打印介质118的盒。在另一实施例中,喷墨打印头组件102为非扫描型打印头组件。这样,安装组件106将喷墨打印头组件102固定于相对于介质传送组件108的指定位置。因此,介质传送组件108使打印介质118相对于喷墨打印头组件102定位。
电子打印机控制器110通常包括处理器、固件、软件、包括易失性和非易失性存储器部件的一个或者多个存储器部件以及用于与喷墨打印头组件102、安装组件106和介质传送组件108通信并且控制喷墨打印头组件102、安装组件106和介质传送组件108的其他打印机电子装置。电子控制器110从主机系统、诸如计算机接收数据124并且在存储器中暂时存储数据124。通常,沿着电子、红外、光学或者其他信息传送路径向喷墨打印系统100发送数据124。数据124例如代表待打印的文档和/或文件。这样,数据124形成用于喷墨打印系统100的打印作业并且包括一个或者多个打印作业命令和/或命令参数。
在一个实施例中,电子打印机控制器110控制喷墨打印头组件102用于从喷嘴116喷射墨滴。因此,电子控制器110限定在打印介质118上形成字符、符号和/或其他图形或者图像的喷射墨滴的图案。喷射墨滴的图案由打印作业命令和/或命令参数确定。在一个实施例中,电子控制器110包括存储于控制器110的存储器中的能量提升模块126。提升模块126在电子控制器110(即控制器110的处理器)上执行以控制流体喷射组件114内的喷嘴喷射元件和泵元件的激活序列,以及在这样的激活之间的时间间隔。因此,提升模块126包括可编程元件序列部件和可编程时间间隔部件。
在一个实施例中,喷墨打印头组件102包括一个流体喷射组件(打印头)114。在另一实施例中,喷墨打印头组件102是宽阵列或者多头打印头组件。在一个宽阵列实施例中,喷墨打印头组件102包括如下载体,该载体承载流体喷射组件112、提供在流体喷射组件114与电子控制器110之间的电通信并且提供在流体喷射组件114与墨供应组件104之间的流体连通。
在一个实施例中,喷墨打印系统100是按照需求滴液热气泡喷墨打印系统,其中流体喷射组件114是热喷墨(TIJ)打印头。热喷墨打印头在墨腔中实施热电阻器喷射元件以蒸发墨并且产生迫使墨滴或者其他流体滴液离开喷嘴116的气泡。
图2和3示出根据公开的一个实施例的流体喷射组件114的横截面图。图2示出切过滴液生成器和出口通道的流体喷射组件114的横截面图,而图3示出切过流体泵元件和入口通道的流体喷射组件114的横截面图。图4和图5示出根据公开的实施例的流体喷射组件114内的微再循环架构的部分俯视图。图4图示如下实施例,在该实施例中存在用于向每个喷射元件216循环流体的单个再循环通道和泵元件206。图5图示如下实施例,在该实施例中存在用于经过两个相应再循环通道向两个喷射元件216循环流体的单个泵元件206。仅通过示例示出这些实施例,并且包括每个泵元件206的更大数量的再循环通道和喷射元件216的其他实施例是可能的。
一般地参照图2、3、4和5,流体喷射组件114包括衬底200,该衬底200具有在其中形成的流体槽202。流体槽202是向图2的平面中延伸的伸长槽,该伸长槽与流体供应(未示出)、诸如流体贮存器120有流体连通。一般而言,来自流体槽202的流体基于流体泵元件206引起的流经过滴液生成器204循环。如图2-5中的黑方向箭头所示,泵元件206经过流体再循环通道从流体槽202泵送流体。再循环通道包括入口通道208、连接通道210和出口通道212。再循环通道始于流体槽202并且先穿过入口通道208,该入口通道208包含一般朝着再循环通道的开始定位的泵元件206。再循环通道然后经过连接通道210继续。再循环通道然后穿过包含滴液生成器204的出口通道212并且在往回返回到流体槽202时完成。注意,经过连接通道210的流向由图3中的带叉圆圈(进入平面的流)和图2中的带点圆圈(从平面出来的流)指示。然而仅通过示例示出这些流向,并且在各种泵配置中并且依赖于特定横截面图在何处穿过流体喷射组件114,可以反转方向。
仍然参照图2-5,流体泵元件206在入口通道208内的确切位置可以有些变化,但是在任何情况下将相对于再循环通道的长度的中心点不对称地定位。例如,再循环通道的近似中心点位于图2-5的连接通道210中的某处,因为再循环通道在流体槽202中始于点“A”处、经过入口通道208、连接通道210和出口通道212延伸,并且然后在流体槽202中往回结束于点“B”处。因此,流体泵206在入口通道208内的不对称位置在泵206与流体槽202之间产生再循环通道的短边,以及产生从泵206经过出口通道212并且向流体槽202往回延伸的再循环通道的长边。流体泵206在再循环通道的短边的不对称位置是用于再循环通道内的流体双极性(diodicity)的基础,该流体双极性造成在如黑方向箭头所示的朝着再循环通道和出口通道212的长边的向前方向上的净流体流量。
滴液生成器204布置于流体槽202的任一侧上并且沿着槽的长度向图2的平面中延伸。每个滴液生成器204包括喷嘴116、喷射腔214和设置于腔214中的喷射元件216。将滴液生成器204(即喷嘴116、腔214和喷射元件216)组织成称为基元(primitive)600(图6)的组,其中每个基元600包括一组相邻喷射元件216。基元600通常包括一组十二个滴液生成器204,但是可以包括不同数量,诸如六个、八个、十个、十四个、十六个等。
喷射元件216可以是能够操作用于经过对应喷嘴116喷射流体滴液的任何设备,诸如热电阻器或者压电致动器。在所示实施例中,喷射元件216和流体泵206是由衬底200的顶表面上的氧化物层218和氧化物层218的顶部上涂敷的薄膜堆220形成的热电阻器。薄膜堆220一般包括氧化物层、限定喷射元件216和泵206的金属层、传导迹线以及钝化层。虽然讨论流体泵206为热电阻器元件,但是在其他实施例中,它可以是可以在流体喷射组件114的入口通道208内适当部署的各种类型的泵送元件中的任何类型的泵送元件。例如,在不同实施例中,可能实施流体泵206为压电致动器泵、静电泵、电液力(electrohydrodynamic)泵等。
在衬底200的顶表面上也形成用于选择性地激活每个喷射元件216和流体泵元件206的附加集成电路222。附加电路222包括例如与每个喷射元件216关联的驱动晶体管,诸如场效应晶体管(FET)。尽管每个喷射元件216具有用于实现每个喷射元件216的单独激活的专用驱动晶体管,但是每个泵206可以没有专用驱动晶体管,因为一般无需单独激活泵206。实际上,单个驱动晶体管通常同时向一组泵206供电。流体喷射组件102也包括具有壁和腔214的腔层224,该腔层224将衬底200与具有喷嘴108的喷嘴层226分离。
图6示出框图,该框图图示根据公开的一个实施例的流体喷射组件114的衬底200上的附加集成电路222。流体喷射组件114中的附加集成电路222包括被配置为响应于从电子控制器110接收的控制信号激活喷射元件216和泵元件206的单独可寻址驱动电路602(例如地址A1-A14)。可寻址驱动电路602包括控制喷嘴喷射器元件216的激活的喷嘴喷射器元件驱动电路602A和控制泵元件206的激活的泵元件驱动电路602B。在图6的实施例中,基元600包括具有喷射元件216和两个泵元件206的十二个喷嘴。在这样的布置中,每个泵元件206以与图5的实施例中所示方式相似的方式经过六个相应再循环通道向六个喷射元件216循环流体。
图7示出框图,该框图图示根据公开的一个实施例的流体喷射组件114的衬底200上的附加集成电路222,其中专用驱动电路(例如驱动晶体管,诸如场效应晶体管(FET))支持每个单独泵元件206。在这一实施例中,每个基元600有八个泵元件206和八个喷射元件216。在这一布置中,每个泵元件206以与上文讨论的图4的实施例中所示方式相似的方式经过单个再循环通道向单个喷射元件216循环流体。
现在参照图6和7并且如上文关于图1指出的那样,提升模块126可在电子控制器110的一个或者多个处理部件上执行以控制流体喷射组件114内的喷嘴喷射元件216和泵元件206的激活序列并且控制在这样的激活之间的时间间隔。这样的控制实现向从喷嘴116喷射的流体滴液传输附加能量,这有助于克服可能已经在喷嘴116中发展的粘性墨栓塞和/或外皮。提升模块126包括使电子控制器110能够控制单独可寻址驱动电路602(即602A和602B)的可编程“元件序列”部件和“时间间隔”部件。因此通过单独可寻址驱动电路602,提升模块126使电子控制器110能够调整基元600内的喷嘴喷射元件216和关联的泵元件206的激活的序列。此外,可以精确控制在泵元件206和喷射元件216的激活之间的时间间隔。
一般而言,为了实现将克服已经在喷嘴116中发展的粘性墨栓塞和/或外皮的有益滴液能量提升,恰在激活关联喷嘴喷射元件216之前或者与激活关联喷嘴喷射元件216同时激活泵元件206。激活泵元件206引起再循环通道内的流体运动,该流体运动向在激活喷射元件216时生成的流体滴液赋予附加的能量提升。在一个示例实施例中,用于时间间隔的有益值是2微秒或者更少。因此,参照图6的实施例,电子控制器110向泵元件驱动电路602B,诸如在地址“A1”处的驱动电路602B提供激活信号,随后不久(即小于2微秒)跟随有去往喷嘴喷射驱动电路602A、诸如在地址“A5”处的驱动电路602A的激活信号。注意在图7的实施例中,根据哪个泵元件206与哪个喷嘴喷射元件216关联,去往在地址“A1”处的泵元件驱动电路602B的激活信号将跟随有去往诸如“A9”的地址处的喷嘴喷射器驱动电路602A的激活信号。在另一示例实施例中,时间间隔为零。因此,参照图6和图7两者中的实施例,电子控制器110在相同时间向泵元件驱动电路602B(例如在地址“A2”处)和向喷射元件驱动电路602A(例如在地址“A13”处)提供激活信号,从而引起同时泵元件206和关联喷射元件216的激活。也已经示出泵元件206和关联喷射元件216的同时激活以实现有益滴液能量提升。
虽然已经讨论时间间隔的特点示例,但是也可以使用在泵元件206和喷嘴喷射元件216的激活之间的不同时间间隔来实现有益滴液能量提升。因此,设想例如大于或者小于2微秒的时间间隔。这样的时间间隔至少部分低依赖于在流体喷射组件114的微再循环架构内可能的各种尺寸几何形状。
Claims (13)
1.一种流体喷射组件,包括:
流体槽;
再循环通道;
在所述再循环通道内的滴液喷射元件;
泵元件,用于经过所述再循环通道向和从所述流体槽泵送流体;以及
与所述滴液喷射元件关联的第一可寻址驱动电路和与所述泵元件关联的第二可寻址驱动电路,所述驱动电路能够同时驱动所述滴液喷射元件和所述泵元件并且被配置用于从控制器接收信号来以滴液喷射元件和泵元件的激活之间的编程的时间间隔激活所述滴液喷射元件和泵元件。
2.如权利要求1所述的流体喷射组件,包括多个再循环通道,每个再循环通道包括滴液喷射元件并且每个滴液喷射元件具有单独可寻址驱动电路。
3.如权利要求1所述的流体喷射组件,还包括滴液生成器,所述滴液生成器包括所述滴液喷射元件和发射腔。
4.如权利要求1所述的流体喷射组件,其中从由热电阻器和压电致动器构成的组选择所述滴液喷射元件和所述泵元件。
5.如权利要求1所述的流体喷射组件,其中所述再循环通道包括:
入口通道;
出口通道;以及
连接通道。
6.如权利要求5所述的流体喷射组件,其中所述入口通道包括所述泵元件,并且所述出口通道包括所述滴液喷射元件。
7.一种操作流体喷射组件的方法,包括:
在流体喷射组件的流体再循环通道内:
激活滴液喷射元件以从滴液生成器喷射流体滴液;并且
通过先激活泵元件来向所述流体滴液增加喷射能量,并且
在激活所述泵元件之后的可编程时间间隔内,激活所述滴液喷射元件。
8.如权利要求7所述的方法,其中所述可编程时间间隔为零,使得同时激活所述滴液喷射元件和所述泵元件。
9.如权利要求7所述的方法,其中所述可编程时间间隔为两微秒,使得在激活所述泵元件之后的小于两微秒内激活所述滴液喷射元件。
10.如权利要求7所述的方法,其中激活所述滴液喷射元件包括在与所述滴液喷射元件关联的可寻址喷射驱动电路处接收激活信号,并且激活所述泵元件包括在可寻址泵驱动电路处接收激活信号。
11.如权利要求10所述的方法,其中接收激活信号包括从执行滴液能量提升模块的控制器接收激活信号,所述滴液能量提升模块具有用于控制在激活所述泵元件与激活所述滴液喷射元件之间的时间量的可编程时间间隔。
12.一种流体喷射设备,包括:
流体喷射组件,具有在再循环通道内的滴液喷射元件和泵元件;
电子控制器;以及
滴液能量提升模块,在所述电子控制器上可执行以在激活所述泵元件的时间间隔内激活所述滴液喷射元件。
13.如权利要求12所述的流体喷射设备,还包括:
所述提升模块的可编程时间间隔部件,用于使所述电子控制器能够调整所述时间间隔;以及
所述提升模块的可编程元件序列部件,用于使所述电子控制器能够调整喷嘴基元内的滴液喷射元件的激活序列。
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PCT/US2010/054412 WO2012057758A1 (en) | 2010-10-28 | 2010-10-28 | Fluid ejection assembly with circulation pump |
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CN103153627A CN103153627A (zh) | 2013-06-12 |
CN103153627B true CN103153627B (zh) | 2016-02-24 |
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EP (1) | EP2632729B1 (zh) |
JP (1) | JP5631501B2 (zh) |
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CN (1) | CN103153627B (zh) |
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EP2632729A4 (en) | 2018-03-14 |
BR112013010249B1 (pt) | 2021-06-22 |
JP2013544678A (ja) | 2013-12-19 |
WO2012057758A1 (en) | 2012-05-03 |
KR101686286B1 (ko) | 2016-12-28 |
US8939531B2 (en) | 2015-01-27 |
EP2632729A1 (en) | 2013-09-04 |
KR20130137638A (ko) | 2013-12-17 |
US20130155135A1 (en) | 2013-06-20 |
BR112013010249A2 (pt) | 2020-09-01 |
EP2632729B1 (en) | 2020-09-02 |
CN103153627A (zh) | 2013-06-12 |
JP5631501B2 (ja) | 2014-11-26 |
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