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首页> 外文会议>2016 International Conference on Microelectronics, Computing and Communications >An energy-efficient proposal for digital clocks in public display systems
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An energy-efficient proposal for digital clocks in public display systems

机译：公共显示系统中数字时钟的节能建议

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In this era of digitisation, digital technology is successfully replacing analog tools and equipments. The conventional digital display clocks used in public display systems like bus-stops and railway-platforms are lagging far behind in terms of modernisation in technology. The idea proposed in this paper solely relates to the reduction in power required to drive these digital clocks which can be understood by the application of primary mathematical reasoning concepts only. For indicating time in the digital style, two prevalent formats are the 24 hour format and the 12 hour format of time display. On critical investigation of the power required to drive these two digital clocks, we arrive at a conclusion that the 24 hour format clock is more energy-efficient by 6% than its 12 hour format counterpart. Energy-efficiency in this report refers to the power that is dissipated in illuminating the LEDs or other light-generating elements used to construct this digital clock. There is always a trade-off between user-convenience and the power requirement. The merit of the proposed solution lies here, whereby it takes care of both, the convenience of the user who is more familiar with the 12 hour display format as well as the power required in order to drive such a digital clock. Moreover, the 24 hour format requires an additional flip-flop as compared to the 12 hour format. Power saving may further be improved by reducing the frequency of display (a blinking system) and also by using Mod 10 and Mod 12 Gray counters as we know that Gray counters are highly power efficient due to fewer transitions. The proposed methodology saves us 46.15% of energy compared to the existing 12 hour display format and 42.20% energy with respect to the 24 hour display format. Mathematical explanations to justify the above details have been assembled in the latter half of the paper. Final conclusions have been drawn regarding the effectiveness of the proposed solution and future scope of work in this area has been discussed.
机译：在这个数字化时代，数字技术正在成功取代模拟工具和设备。在技​​术的现代化方面，公交车站和铁路平台等公共显示系统中使用的常规数字显示时钟远远落后。本文提出的想法仅涉及降低驱动这些数字时钟所需的功率，这只能通过应用主要的数学推理概念来理解。为了以数字方式指示时间，两种流行的格式是24小时格式和12小时格式的时间显示。在对驱动这两个数字时钟所需的功率进行严格研究后，我们得出的结论是，24小时制时钟比12小时制时钟节能6％。本报告中的能效是指照亮用于构造此数字时钟的LED或其他发光元件时所消耗的功率。用户便利性和电源需求之间始终存在一个权衡。所提出的解决方案的优点在于，它兼顾了更加熟悉12小时显示格式的用户的便利性以及驱动这种数字时钟所需的功率。此外，与12小时制相比，24小时制需要一个额外的触发器。通过降低显示频率（闪烁的系统）以及使用Mod 10和Mod 12 Gray计数器，可以进一步提高省电效果，因为我们知道Gray计数器由于转换次数少，因此具有很高的电源效率。与现有的12小时显示格式相比，拟议的方法可为我们节省46.15％的能量，而相对于24小时显示格式，则可为我们节省42.20％的能量。证明上述细节合理的数学解释已在本文的后半部分进行了汇总。对于所提出的解决方案的有效性已得出最终结论，并且已经讨论了该领域的未来工作范围。

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