键盘的点事

身为Geek,每天摸的第二多的肯定是键盘（第一当然是鼠标了）。可这个我们每天用到的玩意儿,谁又敢说对它是完全的了解了？键盘按接口分,可以分为AT键盘,PS／2键盘,USB键盘和无线键盘;按布局分,可以分为QWERTY键盘,DVORAK式键盘和MALT键盘;按结构分,可以分为机械式键盘,导电像胶式键盘,     

DY经验谈：让“坏”键盘重获“新生”

在键盘使用频率很高的网吧中，经常出现开机检测不到键盘的情况。此时大家往往误以为键盘损坏而将其扔掉。其实，键盘不一定是彻底损坏，而是键盘线折断了，包裹键盘线的绝缘胶皮比较容易老化、变硬变脆，用户在拉扯键盘线时就容易折断键盘线。只要将折断的键盘线剪掉，将后面的完好键盘线重新焊接就能让键盘恢复正常了。     

多彩技术讲座之键盘篇

一、键盘发展简史1.键盘布局的变迁PC键盘是从打字机演变而来的,而打字机键盘的布局已出现将近100年了,始终没有变化过。PCXT/AT时代的键盘主要以83键为主,并且延续了相当长的时间。但随着视窗系统的流行,这种键盘已被淘汰,取而代之的是101、104、107键键盘。其中,104键盘又称Win95键盘;107键盘又称为Win98键盘,比104键多     

妙用键盘Winkey组合键

Winkey指的是键盘上刻有Windows徽标的键。Winkey主要出现在104键和107键的键盘中。104键盘又称Win95 键盘,这种键盘在原来101键盘的左右两边的Ctrl和Alt键之间增加了两个Windwos键和一个属性关联键。107键盘又 称为Win98键盘,比104键多了,“睡眠、唤醒、开机”等电源管理键,这三个键大部分位于键盘的右上方。     

PC机的键盘及其编程

本文从键盘监控，键盘缓冲区，重编键盘中断三个方面系统地介绍了有关ＰＣ机键盘的知识，以及设计键盘处理程序时应注意的问题，还给出了一个可以随时弹出，进行键盘宏定义的内存驻留程序作为示例。     

让老键盘焕发青春

一些老键盘,功能太少,无法与多媒体键盘比,比如键盘没有音量控制键或是音乐播放键,对我们操作不利,但有了HotkeyControl键盘改造工具,它可以将普通键盘改造成多媒体键盘。Hotkeycontrol可以利用键盘上的按键,让电脑控制更自由,让老键盘也能摇身一变成各种系统功能的控制台。(下     

旋钮式键盘及其与AT89C52的接口技术

引言 如今单片机技术发展迅速,单片机系统已被广泛地应用于国民经济的各个领域。很多单片机应用系统需要输入设备,典型的输入设备要数键盘了。目前使用的键盘主要有两类:按键式键盘和旋钮式键盘。手机按键、微机键盘都属于按键式键盘。本文介绍的是旋钮式键盘的实现方法。     

将键盘放进口袋——可折叠键盘导购

键盘是电脑最基本,最常见的外设,而键盘却是使用最频繁的设备,毕竟我们时刻都要在键盘上敲打,如果你已经厌倦了设计常规的普通键盘,如果你希望随时随身携带键盘出门,不妨选择一款可折叠键盘。     

有线键盘改装成无线键盘的控制方法研究

通过PS-2键盘接口通讯协议和Wireless USB技术的研究,提出了一种在PS-2接口的有线键盘上设置一个无线发射器,在PC主机端设置一个USB接口接收器,将原来的有线键盘改装成无线键盘的方法。文中对无线发射器和USB接口接收器的硬件设计、无线通讯协议及软件设计等内容进行了详细地阐述。对IBM KB-2961的PS-2键盘进行了改装,实现所有按键的无线功能。该键盘的发射器和接收器,既充分利用了原来的有线键盘,节省了资源,同时又实现了键盘的无线功能。若对用户已有的有线键盘进行改装,在市场上具有很高推广价值。     

清新、润泽——新贵青梅多媒体键盘旗舰版

自PC面世以来,键盘作为最重要的输入部件之一,其演变是最慢且最少 的,当然,这取决于人们已定了型的使用习惯。经过漫长的发展,多 功能／多媒体键盘比比皆是,绝大部分产品都具有这种特性。但从外观设计 来讲,我们可把键盘分为4大类:传统式键盘、人体工学键盘、游戏键盘、 轻薄／紧凑型键盘。这每种类别的键盘中不乏精品,本次送测的新贵青梅多 媒体键盘旗舰版便是轻薄／紧凑型键盘中的佼佼者。     

User navigation in computer applications

An abstract model of keyboard navigation that is based on real-world requirements is described. The importance of keyboard navigation is discussed, and the current approaches to keyboard navigation are reviewed. Several requirements for a successful model of keyboard navigation, including that keyboard navigation and direct manipulation must coexist in the same application, are described. Examples of successful use of the proposed approach to keyboard navigation in application development are presented     

嵌入式软键盘UI一致性与功能差异性的研究

为了解决嵌入式WinCE系统所带软键盘按钮小和嵌入式设备触模操作便捷性要求之间矛盾,本文提出设计软键盘代替WinCE系统所带软键盘。为了解决嵌入式系统中多个数据输入的软键盘界面与嵌入式系统资源有限的矛盾,在设计中,提出了一种将软键盘界面与增加数据功能、删除数据功能、显示数据功能、数据合法性检查功能等键盘处理逻辑分离的技术,不同功能模块调用统一软键盘界面,实现了软键盘UI一致性和功能差异性,从而节省了系统资源;此外,为了减少软键盘按钮数,在小触模屏条件下触模按钮做得更大,提出了系统附加数据单位字符技术,这种技术也提高了用户数据输入速度。综合运用这些技术,完成了基于WinCE平台软键盘开发研制,实际应用表明提高了操作便捷性。     

标准键盘布局比较与优化设计

键盘作为基本的人机交互设备之一,在多个领域有广泛的应用。对于标准键盘,现有的Qwerty键盘布局并不是为提高工作效率而设计的。而键盘输入作为一个复杂的人体工程学问题,依赖于操作者的习惯、不同手指的易用性差异以及不同的文本信息等诸多因素。在键盘输入过程分解、手指参数假定和语言文本分析之上,通过定义距离矩阵和文本矩阵,为标准键盘布局比较和优化设计建立较为客观的评价模型,并对现有键盘布局进行比较。作为应用,给出了针对汉语拼音输入的新键盘布局,并利用实际文本进行了测试与比较。     

Design and evaluation of a curved computer keyboard

Conventional, straight keyboards remain the most popular design among keyboards sold and used with personal computers despite the biomechanical benefits offered by alternative keyboard designs. Some typists indicate that the daunting medical device-like appearance of these alternative ‘ergonomic’ keyboards is the reason for not purchasing an alternative keyboard design. The purpose of this research was to create a new computer keyboard that promoted more neutral postures in the wrist while maintaining the approachability and typing performance of a straight keyboard. The design process created a curved alphanumeric keyboard, designed to reduce ulnar deviation, and a built-in, padded wrist-rest to reduce wrist extension. Typing performance, wrist postures and perceptions of fatigue when using the new curved keyboard were compared to those when using a straight keyboard design. The curved keyboard reduced ulnar deviation by 2.2° ± 0.7 (p < 0.01). Relative to the straight keyboard without a built-in wrist-rest, the prototype curved keyboard with the built-in padded wrist-rest reduced wrist extension by 6.3° ± 1.2 (p < 0.01). There were no differences in typing speed or accuracy between keyboards. Perceived fatigue ratings were significantly lower in the hands, forearms and shoulders with the curved keyboard. The new curved keyboard achieved its design goal of reducing discomfort and promoting more neutral wrist postures while not compromising users' preferences and typing performance.     

Effects of negatively sloped keyboard wedges on risk factors for upper extremity work-related musculoskeletal disorders and user performance

Several changes to computer peripherals have been developed to reduce exposure to identified risk factors for musculoskeletal injury, notably in keyboard designs. Negative keyboard angles and their resulting effects on objective physiological measures, subjective measures and performance have been studied, although few angles have been investigated despite the benefits associated with their use. The objective of this study was to quantify the effects of negative keyboard angles on forearm muscle activity, wrist posture, key strike force, perceived discomfort and performance and to identify a negative keyboard angle or range of keyboard angles that minimizes exposure to risk factors for hand/wrist injuries. Ten experienced typists (four males and six females) participated in a laboratory study to compare keyboard angles ranging from 0° to ?30°, at 10° increments, and a keyboard with a 7° slope, using a wedge designed for use with standard QWERTY keyboards. Repeatability of exposures was examined by requiring participants to complete two test sessions 1 week apart. Dependent variable data were collected during 10 min basic data entry tasks. Wrist posture data favoured negative keyboard angles of 0° (horizontal) or greater, compared to a positive keyboard angle of 7°, especially for the flexion/extension direction. In general, the percentage of wrist movements within a neutral zone and the percentages of wrist movements within ±5° and ±10° increased as keyboard angle became more negative. Electromyography results were mixed, with some variables supporting negative keyboard angles whilst other results favoured the standard keyboard configuration. Net typing speed supported the ?10° keyboard angle, whilst other negative typing angles were comparable, if not better than, with the standard keyboard. Therefore, angles ranging from 0° to ?30° in general provide significant reductions in exposure to deviated wrist postures and muscle activity and comparable performance.     

Effects of negatively sloped keyboard wedges on risk factors for upper extremity work-related musculoskeletal disorders and user performance

Several changes to computer peripherals have been developed to reduce exposure to identified risk factors for musculoskeletal injury, notably in keyboard designs. Negative keyboard angles and their resulting effects on objective physiological measures, subjective measures and performance have been studied, although few angles have been investigated despite the benefits associated with their use. The objective of this study was to quantify the effects of negative keyboard angles on forearm muscle activity, wrist posture, key strike force, perceived discomfort and performance and to identify a negative keyboard angle or range of keyboard angles that minimizes exposure to risk factors for hand/wrist injuries. Ten experienced typists (four males and six females) participated in a laboratory study to compare keyboard angles ranging from 0 degrees to -30 degrees , at 10 degrees increments, and a keyboard with a 7 degrees slope, using a wedge designed for use with standard QWERTY keyboards. Repeatability of exposures was examined by requiring participants to complete two test sessions 1 week apart. Dependent variable data were collected during 10 min basic data entry tasks. Wrist posture data favoured negative keyboard angles of 0 degrees (horizontal) or greater, compared to a positive keyboard angle of 7 degrees , especially for the flexion/extension direction. In general, the percentage of wrist movements within a neutral zone and the percentages of wrist movements within +/-5 degrees and +/-10 degrees increased as keyboard angle became more negative. Electromyography results were mixed, with some variables supporting negative keyboard angles whilst other results favoured the standard keyboard configuration. Net typing speed supported the -10 degrees keyboard angle, whilst other negative typing angles were comparable, if not better than, with the standard keyboard. Therefore, angles ranging from 0 degrees to -30 degrees in general provide significant reductions in exposure to deviated wrist postures and muscle activity and comparable performance.     

Performance effects of reduced proprioceptive feedback on touch typists and casual users in a typing task

This study examined performance and acceptance effects of lack of kinesthetic and tactile feedback from the keyboard in a typing task with two subject groups of differing skill level: touch typists and casual users. Subjects' objective performance (e.g., speed, accuracy, throughput) and subjective acceptance (questionnaire) was evaluated for both a conventional full travel keyboard and a prototype piezoelectric flat keyboard which lacked familiar kinesthetic and tactile feedback. Any performance decrement present with the flat keyboard was expected to diminish with practice for the touch typists due to transfer and adaptation of typing skills. Performance for both subject groups was significantly higher with the conventional keyboard and touch typists' performance was more adversely affected by the flat keyboard than casual users'. No performance improvement with practice was found for one subject group relative to the other or for one keyboard relative to the other. It was concluded the touch typists were unable to adapt to the unusual feedback conditions present with the piezo-electric fiat keyboard.     

智能仪表监控功能的设计与开发

智能仪表中的监控功能是人机交互的重要渠道。文中对智能仪表监控功能键盘与显示硬件电路进行了设计。介绍了智能仪表火灾报警仪中键盘功能实现。阐述了键盘处理应注意的几个问题。解决了键抖动与键连击的问题。说明了中断响应及键值读取程序设计。设计了火灾报警仪中报警上限参数设置画面等,说明了选择性屏蔽按键功能。文中介绍的智能仪表功能已得到了实际验证。     

基于S3C2440A的液晶触摸乱序密码键盘设计

针对固定密码键盘存在的问题,设计了一种乱序密码键盘。给出了乱序密码键盘的组成,重点介绍了主要硬件和软件的设计方法。测试结果表明,乱序密码键盘的随机性很好,具有较高的安全性和保密性。