Keyboard entry

Many recent studies of keyboard entry are summarized with particular emphasis on performance data and fundamental questions about the design of keyboards. The role of auditory and visual feedback and physiological measurements are reviewed. Typical speed and error rates are given for several types of situations and operators. Other methods of data entry are considered, as are source documents, ordering of keys, keyboard interlocks, and chord keyboards. These data should be of interest to anyone concerned with the design and use of keyboards or other data entry devices.     

The Chord Keyboard

A keyboard prototype offers one-handed operation, small size, low cost of manufacture, and permits the touch typing of large alphabets.     

华硕出了款支持ATA100的DVD-ROM

应该叫它PCKevboard还是Kevboard PC?这个超小型PC机的造型真的是小巧玲珑，准确地说，它就是一个具有一台PC的完整功能的键盘。叫做zero-Footprint-PC：     

The MOD Keyboard

A special plug-in cartridge for the VIC-20 converts it into a dynamic keyboard emulator that enables a handicapped user to control a second, unmodified computer.     

Linux的键盘驱动与Qt/E的键盘映射

介绍一种通过Samsung公司S3C2410芯片上的GPIO口及其复用的中断口来实现自制6×6矩阵键盘的驱动程序编写方法,并将得到的按键键值映射到嵌入式图形用户界面Qt/E（Qt_Embedded）上,实现通过键盘来控制Qt/E上应用程序的运行,达到人机交互的目的。     

惠普便携迷你键盘

惠普近日推出两款键盘新品,惠普盈狐迷你键盘和惠普24G无线飞狐迷你键盘。这两款新品采用迷你造型,手感舒适。满足用护在移办使用中的便携需求。惠普盈狐迷你键盘有两种型号,白色XW882PA#AB2和黑色XW883P#AB2。键     

激光投影键盘Magic Cube

正智能手机、平板电脑等便携移动终端为我们带来很多的方便,但由于受到外形尺寸的约束,使其输入性能欠佳。Magic Cube是一款激光投影键盘,拥有小巧精致的外观,能够支持Android和iOS等主流的移动操作系统,提高移动设备的输入性能。Magic Cube的尺寸为75×38×30mm,重量为78g,便于携     

单片机键盘电路的优化

~~2软件编程软件编程的基本思想与矩阵键盘一致。首先以L1输出低电平,将L2~L8设置为输入,读L2~L8的状态,如全为“1”则K12~K18中无按键。然后以L2输出低电平,将L3~L8设置为输入,读L3~L8的状态,如全为“1”则K23~K28中无按键。按此方法继续L3~L7。以下为判别8线准矩阵式组合键盘电路的C51源程序。unsignedcharkb_input(void){unsignedchari,j,key_value;unsignedcharport_input,key_bit;unsignedcharscan_point;//扫描指针key_value=0x00;//无按键时键值为0x00for(i=0;i<7;i++){//用P1.0~P1.6扫描scan_point=0xfe;//指定扫描初始位置…     

线反转法矩阵键盘程序设计

本文详细介绍分别采用C51及汇编语言进行线反转法键盘程序设计,此法不需扫描,键盘响应速度快。代码已优化,作为子程序及函数可供直接调用。     

键盘输入安全研究

键盘记录器是网络用户面临的主要安全威胁之一.以保障敏感信息的安全输入为出发点,分析了按键信息传输流程,系统总结了键盘输入信息所面临的来自物理层、内核层、应用层的截获、查询、旁路等类型的安全威胁以及现有研究和应用的相应防御措施;介绍了软键盘所面临的偷窥、消息截获、截屏等威胁及其防御措施,提出鼠标记录攻击、控件分析攻击等新的威胁以及相应的对策;然后对现有研究和应用的敏感信息输入进行了安全性测试;最后介绍了现有研究中基于行为的键盘记录器检测方法.     

Multilingual Touchscreen Keyboard Design and Optimization

A keyboard design, once adopted, tends to have a longlasting and worldwide impact on daily user experience. There is a substantial body of research on touch-screen stylus keyboard optimization. Most of it has focused on English only. Applying rigorous mathematical optimization methods and addressing diacritic character design issues, this article expands this body of work to French, Spanish, German, and Chinese. More important and counter to the intuition that optimization by nature is necessarily specific to each language, this article demonstrates that it is possible to find common layouts that are highly optimized across multiple languages for stylus (or single finger) typing. We first obtained a layout that is highly optimized for both English and French input. We then obtained a layout that is optimized for English, French, Spanish, German, and Chinese pinyin simultaneously, reducing its stylus travel distance to about half of QWERTY's for all of the five languages. In comparison to QWERTY's 3.31, 3.51, 3.7, 3.26, and 3.85 keys of movement for English, French, Spanish, German, and Chinese, respectively, the optimized multilingual layout has an average travel distance of 1.88, 1.86, 1.91, 1.77, and 1.68 keys, correspondingly. Applying Fitts's law with parameters validated by a word tapping experiment, we show that these multilingual keyboards also significantly reduce text input time for multiple languages over the standard QWERTY for experienced users. In comparison to layouts individually optimized for each language, which are also obtained in this article, simultaneously optimizing for multiple languages caused only a minor performance degradation for each language. This surprising result could help to reduce the burden of multilingual users having to switch and learn new layouts for different languages. In addition, we also present and analyze multiple ways of incorporating diacritic characters on multilingual keyboards. Taken together, the present work provides a quantitative foundation for the understanding and designing of multilingual touch-screen keyboards.     

专用键盘的电磁兼容性设计

论述了为某型号计算机配套的专用键盘电磁兼容性设计问题.通过试验确定了专用键盘的干扰源及干扰的传递途径,采用机箱屏蔽技术和电缆屏蔽技术来切断电磁辐射的途径,以电容作为信号滤波器对键盘芯片进行滤波处理,并通过理论计算确定电容值.实践证明上述措施能有效抑制和防止电磁干扰.     

嵌入式人机界面中的键盘及其接口设计

对键盘及其接口设计,有很多常见的规范设计方法和新的设计思路。文中总结常见的键盘及其接口设计的方法,着重阐述现代嵌入式人机界面中键盘及其接口设计的原理和特点,对比说明各种键盘及其接口设计方法的优劣和应用特点。     

Keyboard design through physiological strain measurements

The physiologically tolerable range of positions for the joints of the upper extremities have been investigated for typing tasks by recording the myoelectric activities of the involved muscles. For long-term typing tasks a split keyboard is recommended allocating a key field to each hand. The fields should be rotated against each other in the horizontal plane and inclined laterally.     

基于Murphypinyin的嵌入式键盘设计

Murphypinyin是目前为止基于Qt／Embedded的一个比较好的开源中文输入法。通过将Murphpinyin开源软件包与Qt／Embedded自带输入法的融合,采用较少的按键,构建了一款适用于手持终端设备的可输入数字、中／英文的嵌入式键盘,并在S3C2440上实现。     

一种小型一体化专用键盘的设计

介绍一种计算机通用键盘小型化、专用化的设计方法,解决微机通用键盘在产品设备中的一体化问题。该设计方法简单易行,实用可靠,对各种仪器设备专用键盘的设计具有普遍意义。     

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