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name="lastpost"></a><div class="pi"> <div class="authi"><a href="http://club.oecr.com/space-uid-2598.html" target="_blank" class="xw1" style="color: #FF6600">gb936</a> </div> </div> <div class="p_pop blk bui card_gender_" id="userinfo383943" style="display: none; margin-top: -11px;"> <div class="m z"> <div id="userinfo383943_ma"></div> </div> <div class="i y"> <div> <strong><a href="http://club.oecr.com/space-uid-2598.html" target="_blank" class="xi2" style="color: #FF6600">gb936</a></strong> <em>当前离线</em> </div><dl class="cl"> <dt>积分</dt><dd><a href="http://club.oecr.com/home.php?mod=space&uid=2598&do=profile" target="_blank" class="xi2">21666</a></dd> </dl><div class="imicn"> <a href="http://club.oecr.com/home.php?mod=space&uid=2598&do=profile" target="_blank" title="查看详细资料"><img src="static/image/common/userinfo.gif" alt="查看详细资料" /></a> <a href="http://club.oecr.com/home.php?mod=magic&mid=showip&idtype=user&id=gb936" id="a_showip_li_383943" class="xi2" onclick="showWindow(this.id, 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class="pct"><style type="text/css">.pcb{margin-right:0}</style><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_383943"> 爱普生(Epson)公司的PictureMate豪华版打印机能够打印来自几乎任何输入源的照片，方便了照片库级打印，使得照片不至于因为太多而“受到冷藏”。为撰写本篇设计揭密所购买的照片打印机套件（包含打印机、墨水和初始相纸包）售价仅为79美元，。 <br /> <br /> 与通用打印机不同的是，PictureMate只能打印4×6英寸的相纸(光面或亚光)。这款爱普生打印机能够接受来自USB源(PC主机、CD-ROM、U盘或直接连至<a href="http://holographic.oecr.com" target="_blank" class="relatedlink">数码</a>相机)和所有类型存储卡内的照片文件，并且可以根据顶部面板上的一排按钮的相应控制输入进行打印。该打印机附带用于图像<a href="http://display.oecr.com" target="_blank" class="relatedlink">显示</a>的2.4英寸QVGA LCD显示屏，为了便于携带，这款重量约为3千克的打印机还附带了一个把手。 <br /> <br /> 这款打印机的打印头并非通过热泡来喷墨，而是在90×6阵列的每个喷嘴处采用压电微型泵将墨汁精确的喷在相纸上。有些打印机每个墨盒都带一个新的打印头，但爱普生这款打印机打印头却设计成在打印机整个生命周期都能使用。作为正常工作的一部分，打印机的内部器具会定期清洁和擦拭打印头表面。每个喷嘴都有陶瓷压电片，可以控制脉冲的运用变得弯曲，而压电位移喷射来自覆盖压电阵列的前端金属板中形成的相应孔中的墨汁。通过控制脉冲幅度和持续时间，能够精确地控制喷墨量。通过在连续彩色区域采用多的墨汁以及在细微区域的精细喷墨，系统就能够使用大小可变的点喷墨，从而速度和精度上进行平衡。 <br /> <br /> 六管流体线缆(每种颜色一条电缆)将墨从墨盒中引导至打印头。墨盒附近的泵产生压力差以将墨管上满墨，并通过一个共用气囊对各个颜色袋进行挤压。气囊压力是通过集成到与打印头清洁器相同的<a href="http://machine.oecr.com" target="_blank" class="relatedlink">机电</a>装置中的蠕动泵提供的。 <br /> <br /> 打印头的动作涉及到一个打印轴，而其它打印轴则为纸盘中的相纸提供排序。显然，打印头的动作与纸传输的密切配合对于获得交错的水平和垂直位移、为无空白的连续打印而进行理想排列是非常有必要的。最高5,760×1,440dpi的分辨率意味着4:1的不对称，可能是由于垂直纸指引的精度与水平打印头喷嘴的斜度之间的不一致造成的。 <br /> <br /> 各个<a href="http://sensor.oecr.com" target="_blank" class="relatedlink">半导体</a>器件的功用分析 <br /> <br /> 如果没有支持的<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>器件，流体或机电装置不可能起作用。除了从不同源读取数据文件、将图像数据映射至打印头驱动器、控制系统马达和<a href="http://sensor.oecr.com" target="_blank" class="relatedlink">传感</a>器、在LCD上显示图像等整个流程，该打印机上的单个控制器面板还可接受用户输入。 <br /> <br /> 存储卡读卡器子系统基于带内存卡插槽的多标准连接器模块。由NEC生产和爱普生贴牌的ASIC(E09A568BA)提供转换硬件，从而将不一致的<a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>卡接口映射至用于使可打印数据文件相一致的源，此外还可能进行某些方面的控制。同样由NEC生产的更复杂的爱普生ASIC E01A63BA可能负责将各种输入照片格式和分辨率转换成光栅和打印形式所需的图像处理任务。两个容量为16MB的三星SDRAM支持图像处理器，一个8MB Oki PROM用于系统控制代码。这个较大的ASIC中还负责处理USB接口。 <br /> <br /> 该打印机所需要的其它独特器件包括Allegro的马达控制ASIC(A6628SEDT)和另一个打着爱普生品牌(但由索尼生产)的双芯片TSOP，猜想是用于为LCD供电并提供时钟支持。 <br /> <br /> 在这款打印机中的所有半导体器件中，也许定制程度最高的器件是用于压电打印头阵列的驱动器芯片。虽然驱动器从图像处理器获取数据和命令，但是它最终必须对微型泵进行精密的调制。此外，源自凌力尔特(LTC)、国半(NSC)和德州仪器(TI)的器件负责处理电源管理和电压转换等功能，其中，电压转换功能用于对一个便于携带的49美元可选锂离子电池进行充电控制。 <br /> <br /> 考虑到这款打印机的复杂性，79美元的购买价格高于生产成本的可能性值得怀疑。爱普生无疑将其希望寄托在耗材(墨和纸)销售的利润上。 <br /> <br /> <br /> <br /> 图：鉴于其硬件的复杂性，爱普生的PictureMate豪华版照片打印机疑似硬件赔本，靠耗材赚钱。 <br /> <br /> <br /> 作者：David Carey <br /> <br /> 总裁 <br /> <br /> Portelligent公司</td></tr></table> <div class="pattl"> <ignore_js_op> <dl class="tattl attm"> <dt></dt> <dd> <p class="mbn"> <a href="http://bbs.oecr.com/forum.php?mod=attachment&aid=MTU3NjB8YjljNTU1ZjN8MTc2NjA5ODc5NnwwfDYwODUx&nothumb=yes" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" id="aid15760" class="xw1" target="_blank">0710aTD-C.jpg</a> <em 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