嵌入式ARM下的触摸屏驱动系统设计

介绍了基于飞思卡尔芯片i.MX27和嵌入式linux系统下的触摸屏硬件的连接设计和软件的驱动设计,并依照此设计实现了触摸屏的从硬件到软件的驱动系统。该实现主要应用于家庭无线智能控制系统中。文章首先介绍了触摸屏的实现原理,然后介绍了触摸屏芯片AD7873的特性,在此基础上设计了AD7873与i.MX27和触摸屏的连接PCB图,最后依照硬件连接图设计了嵌入式Linux下的驱动,并成功通过了tclib触摸屏专业测试软件的测试,在家庭智能网关系统的测试中也成功运行,实现了从硬件到软件的嵌入式下触摸屏的驱动系统设计。     

小灵通话费信息触摸屏查询系统的设计与实现

触摸屏的应用随着信息社会的发展越来越普遍,目前触摸屏产品在中国已开始形成了产业,触摸屏以其操作简便、界面友好、信息丰富、反映及时、安全可靠、扩充性好、动态联网的特点,受到了广大用户的好评。本文主要通过对小灵通话费查询系统的开发的介绍,着重介绍了触摸屏软件的开发过程以及触摸屏软件在行业信息化过程中所起到的作用。     

嵌入式Linux下一种新的触摸屏定标方法的研究

介绍了一种新型基于嵌入式Liunx平台的触摸屏定标方法.首先对嵌入式系统触摸屏接口电路进行了简单介绍,而后详细分析了一种基于嵌入式Liunx操作系统的触摸屏定标方案,最后通过实例证明了其可行性.     

摸屏技术综述及专利分析

文章简要介绍了近几年出现的多种新型触摸屏技术,按照技术原理将其大致归为5类:3D式触摸屏、投影式触摸屏、柔性触摸屏、具有触觉感受的触摸屏以及其他类型触摸屏,并给出了部分技术的相关专利分析,由此对未来触摸屏技术的发展方向做出预测,以期能够为相关企业提供参考。     

触摸屏在井下水泵控制装置中的应用

结合触摸屏和PLC技术,设计了一套煤矿井下水泵控制装置,详细介绍了西门子触摸屏和PLC在井下水泵控制装置中的应用,阐述了触摸屏与PLC进行数据交换、连接、通信的方法,给出了触摸屏组态软件的编程步骤。     

小灵通话费信息触摸屏查询系统的设计与实现

触摸屏的应用随着信息社会的发展越来越普遍，目前触摸屏产品在中国已开始形成了产业，触摸屏以其操作简便、界面友好、信息丰富、反映及时、安全可靠、扩充性好、动态联网的特点，受到了广大用户的好评。本文主要通过对小灵通话费查询系统的开发的介绍．着重介绍了触摸屏软件的开发过程以及触摸屏软件在行业信息化过程中所起到的作用。     

基于单片机的液晶触摸屏控制系统

以触摸屏控制芯片ADS7843和液晶显示控制器SED1335为例,介绍了触摸屏的结构及工作原理,并以实例说明单片机控制触摸屏的典型应用电路和软件。     

基于Windows CE的触摸屏驱动分析与实现

触摸屏是嵌入式系统中常用的输入设备。本文介绍了Windows CE操作系统中触摸屏驱动程序的模型和工作流程,并给出了AKM4182触摸屏控制芯片在Xscale PXA270平台上的驱动程序。     

触摸屏的工作原理及典型应用

简要介绍触摸屏的结构及工作原理,并以Burr-Brown公司的触摸屏控制芯片ADS7843为例,介绍触摸屏应用的典型电路和操作。由于ADS7843内置12位A/D,理论上触摸屏的输入坐标识别精度为有效长宽的1/4096。     

船舶机舱监控系统触摸屏接口程序的设计

介绍了触摸屏接口程序的设计.分析了触摸屏输出数据格式和接口程序设计思想,详细讨论了串行通信中断服务程序、触摸屏数据处理函数以及应用接口函数的设计过程.设计的程序在机舱监控系统中获得成功应用,对类似系统触摸屏接口程序设计具有较好的参考意义.     

Capacitive touchscreen‐integrated electrostatic tactile display with localized sensation

An electrostatic tactile display with a projected capacitive touchscreen integrated into a single panel was demonstrated. Every electrode on the panel is driven for both tactile presentation and the touch sensor. The functions are both time and spatially multiplexed, and a reference–node‐driven high‐pass filter in the touch controller filters out the noise from the tactile driving signals.     

数字触摸屏在WINDOWS CE中的应用

触摸屏是最方便、简单、自然的输入手段。触摸屏分为数字屏和模拟屏。数字屏可以进行多个触摸位置的采集输入,实现复杂的操作控制。在WINDOWS CE系统中只能有一个输入焦点,不支持数字触摸屏,因此需要进行特殊处理。本文利用流接口进行触摸位置和动作的输入,在应用程序中通过将数字屏触摸数据转化为鼠标消息和自定义人机交互对象进行特殊处理,实现了数字触摸屏在WINDOWS CE中的应用。     

User discomfort, work posture and muscle activity while using a touchscreen in a desktop PC setting

An experimental study was conducted to evaluate physical risk factors associated with the use of touchscreen in a desktop personal computer (PC) setting. Subjective rating of visual/body discomfort, shoulder and neck muscle activity, elbow movement and user-preferred positions of the workstation were quantified from 24 participants during a standardised computer use task with a standard keyboard and a mouse (traditional setting), with a touchscreen and the standard keyboard (mixed-use condition) and with the touchscreen only. The use of a touchscreen was associated with a significant increase of subjective discomfort on the shoulder, neck and fingers, myoelectric activity of shoulder and neck muscles and percentage of task duration that arms were in the air. Participants placed the touchscreen closer and lower when using touch interfaces compared with the traditional setting. Results suggest that users would need more frequent breaks and proper armrests to reduce physical risks associated with the use of a touchscreen in desktop PC settings. Statement of Relevance: In this study, subjective discomfort, work posture and muscle activity of touchscreen desktop PC users were quantitatively evaluated. The findings of this study can be used to understand potential risks from the use of a touchscreen desktop PC and to suggest design recommendations for computer workstations with the touchscreen.     

Cervical spine biomechanics and task performance during touchscreen computer operations

The effects of different touchscreen interface designs on operators' task performance and cervical spine biomechanics were investigated in the current study. Fifteen male participants performed “Whac-a-Mole” type of visual target pinpointing tasks on a touchscreen monitor with different display sizes, icon sizes, icon colors and task difficulties. Participants' task performance, cervical spine biomechanics and upper extremity muscle activities were recorded and compared. Results demonstrated that an oversized desktop touchscreen monitor and small icons generated negative impacts on participants’ task performance and biomechanical measurements. Lighter icon color and more difficult task requirement generated worse task performance but had limited impact on cervical spine biomechanics. In addition, when using an oversized touchscreen monitor, the impacts of icon size and task difficulty seem to be magnified. Our results demonstrated that a more human-oriented interface design could help improve task performance and reduce neck and upper extremity injuries while operating touchscreen monitors.Relevance to industryIn this study we investigated how a number of different design factors could influence task performance as well as cervical spine biomechanics when using touchscreen monitors. Knowledge gained from the current study could help the design of future applications that involve finger touching operations on touchscreen monitors.     

User discomfort,work posture and muscle activity while using a touchscreen in a desktop PC setting

An experimental study was conducted to evaluate physical risk factors associated with the use of touchscreen in a desktop personal computer (PC) setting. Subjective rating of visual/body discomfort, shoulder and neck muscle activity, elbow movement and user-preferred positions of the workstation were quantified from 24 participants during a standardised computer use task with a standard keyboard and a mouse (traditional setting), with a touchscreen and the standard keyboard (mixed-use condition) and with the touchscreen only. The use of a touchscreen was associated with a significant increase of subjective discomfort on the shoulder, neck and fingers, myoelectric activity of shoulder and neck muscles and percentage of task duration that arms were in the air. Participants placed the touchscreen closer and lower when using touch interfaces compared with the traditional setting. Results suggest that users would need more frequent breaks and proper armrests to reduce physical risks associated with the use of a touchscreen in desktop PC settings.

Statement of Relevance: In this study, subjective discomfort, work posture and muscle activity of touchscreendesktop PC users were quantitatively evaluated. The findings of this study can be used to understand potential risksfrom the use of a touchscreen desktop PC and to suggest design recommendations for computer workstations with the touchscreen.     

Young children's transfer of learning from a touchscreen device

Because young children are devoting increasing time to playing on handheld touchscreen devices, understanding children's ability to learn from this activity is important. Through two experiments we examined the ability of 4- to 6-year-old children to learn how to solve a problem (Tower of Hanoi) on a touchscreen device and subsequently apply this learning in their interactions with physical objects. The results were that participants demonstrated significant improvement at solving the task irrespective of the modality (touchscreen vs. physical version) with which they practiced. Moreover, children's learning on the touchscreen smoothly transferred to a subsequent attempt on the physical version. We conclude that, at least with respect to certain activities, children are quite capable of transferring learning from touchscreen devices. This result highlights the limitations of generalizing across screen-based activities (e.g., “screen time”) in discussing the effects of media on young children's development.     

Ruggedized handheld device input effectiveness by generation: A time and error study

The objective of this study is to determine whether ruggedized handheld scanning devices used for industrial purposes should contain one of the most prominent features provided on commercial smart devices: data entry via touchscreen as opposed to a physical keypad. Due to harsh environments, physical keys have been the preferred means of input for rugged handhelds. Advancement in touchscreen technology along with technology expectations brought about by the workforce demographic shift are influencing a notable shift to touch-only input for rugged equipment. Hypotheses expect there to be a difference in usability by worker generation and so 20 Gamers (Millennials) and 20 Baby Boomers performed manual data entry on ruggedized handhelds: one with physical keys and one touchscreen only. All participants took 19% less time on touchscreen than physical keys. Gamers were 31% faster than Boomers on physical keyed devices and 28% faster on touchscreen only. There was no significant difference in errors entered for either device by either age group; however, an 83% increase in permanent errors by Gamers on touchscreen was noted. Transitioning to a rugged device with touch-only input is recommended for industry as it could offer an increase in work productivity. This study presents timely insight into a new tool option for industrial workers.Relevance to industryThis research describes the paradigm shift in the ruggedized handheld device market from physical keys to touchscreen only input and identifies real time productivity savings and error risks that can be expected by different generations of workers in the industrial workforce.     

便携式红外相机中触摸屏原理与应用

为了提高实验型红外相机的灵活性并研究其小型化技术,基于嵌入式系统技术构建了便携式红外相机.红外相机采用带触摸屏的液晶显示器(LCD)作为用户交互设备,其中触摸屏作为输入设备实现对相机的控制.设计了系统硬件,研究了Linux2.6内核下触摸屏的驱动原理,利用校正函数库Tslib进行了触摸屏校正,最后利用Qt/Embedded程序作为用户界面接收用户的触摸屏输入.实验结果表明,触摸屏设备在便携式红外相机中能准确控制系统.