同步脉冲(Sync a)、显示后沿(Back porch b)和显示前沿(Front porch d)都是在行消隐间隔内( Horizontal Blanking Interval)，当行消隐有效时， RGB 信号无效，屏幕不显示数据。
基于8个网页-相关网页
多年来，等离子屏就相当于电视屏中的劳斯莱斯。直到最近LED显示屏被推入市场前沿。
Plasma screens were the Rolls Royce of television screens for years, with LED displays only recently being pushed into the forefront.
目前，基于网络的项目管理系统已经成为研究的热点和前沿领域，并显示出良好的发展前景。
At present, the web based project management system has already become the focus studied and front field, and demonstrated the good development prospect.
自蔓延高温合成技术是20世纪后期诞生的一门新兴的前沿科学，在粉体合成及陶瓷涂层内衬的制备等方面充分显示其优越性。
Born in late 20th century as a frontier field of science, self-propagating high temperature synthesis (SHS) has shown its merits in powder synthesis and manufacture of inner ceramic lining.
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