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Creation and Evaluation of a Multi-sensory Virtual Assembly Environment

International Journal of Automation and computing 2008年第2期5卷 163-173页

作者： adrian r l travis Department of Engineering University of Cambridge

The multi-modal information presentation, integrated into the virtual environment （VE）, has potential for stimulating different senses, improving the user＇s impression of immersion, and increasing the amount of information that is accepted and processed by the user＇s perception system. The increase of the useful feedback information may reduce the user＇s cognitive load, thus enhancing the user＇s efficiency and performance while interacting with VEs. This paper presents our creation of a multi-sensory virtual assembly environment （VAE） and the evaluation of the effects of multi-sensory feedback on the usability. The VAE brings together complex technologies such as constraint-based assembly simulation, optical motion tracking technology, and real-time 3D sound generation technology around a virtual reality workbench and a common software platform. The usability evaluation is in terms of its three attributes： efficiency of use, user satisfaction, and reliability. These are addressed by using task completion times （TCTs）, questionnaires, and human performance error rates （HPErs）, respectively. Two assembly tasks have been used to perform the experiments, using sixteen participants. The outcomes showed that the multi-sensory feedback could improve the usability. They also indicated that the integrated feedback offered better usability than either feedback used in isolation. Most participants preferred the integrated feedback to either feedback （visual or auditory） or no feedback. The participants＇ comments demonstrated that nonrealistic or inappropriate feedback had negative effects on the usability, and easily made them feel frustrated. The possible reasons behind the outcomes are also analysed by using a unifying human computer interaction framework. The implications, concluded from the outcomes of this work, can serve as useful guidelines for improving VE system design and implementation.

关键词： Usability virtual environment (VE) assembly simulation multi-sensory feedback task performance

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Concept for lED Wedge Backlight without Color Control

Concept for LED Wedge Backlight without Color Control

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2007亚洲显示国际会议

作者： adrian travis Timothy large Engineering Department Cambridge University Cambridge CB2 1PZUK Cambridge Flat Projection Displays ltd Manor House Fenstanton PE28 9JQUK

＜正＞lED arrays have wider color co-ordinates and are more easily recycled than fluorescent backlights,but the control of color from each lED is difficult and *** light-guides mix the emissions of adjacent lED’s,but convention- al designs do not mix thoroughly enough to remove the need for color *** propose a design which allows rays to fan-out to the width of the screen before they enter the wedge-shaped *** fan-out region is folded behind the wedge-shaped region so that light from any one lED illuminates the whole screen *** part of the screen is de- signed to be illuminated equally by all the lED’s so there is no need for color control.

关键词： Backlights Color Control lEDs

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平板投影光楔的图象质量

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现代显示 2004年第6期 8-11页

作者： adrian travis Tim large Mark Buckingham 张福俊英国剑桥大学工程学部剑桥平板投影显示有限公司北方交通大学光电所

我们报道了一种厚度为20mm的14英寸平板投影显示屏,其亮度可达5000尼特、分辨率为600×800。这种显示器由现成的有机玻璃制成,使用只带梯形预畸变的无需调节的视频投影仪。在厚度为20mm对角线为50英寸屏幕上光学模拟预示XGA分辨率,亮度... 详细信息

我们报道了一种厚度为20mm的14英寸平板投影显示屏,其亮度可达5000尼特、分辨率为600×800。这种显示器由现成的有机玻璃制成,使用只带梯形预畸变的无需调节的视频投影仪。在厚度为20mm对角线为50英寸屏幕上光学模拟预示XGA分辨率,亮度为500尼特、对比度与传统投影仪相当。

关键词：光楔平板投影图象质量

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