找到约 9200 条相关结果
... 引起支路导通电流 超过LED额定电流,降低LED的工作可靠性等诸多缺陷 ... to branch current to exceed the LED rated current,reducing the LED l i fe . Aiming at this ...
... advantages of emergency lighting system using LED are analyzed. A high efficient LED driver control IC QX9910 is ... . After all component models have been established, a LED lighting and emer- gency lighting dual-use driver ...
... 产生PWM调节LED平均电流值。Light LED is widely used today, but each LED equipped with a ... waste energy therefore. The dimming of multi-channel LED was studied. The driving circuit uses the single ...
... current balancing circuit which is applied to multiple LED strings, aiming at improvingthe efficiency of the system ... the transformer to achieve current balancing of multiple LED strings; the efficiency of the system isimproved by ...
... design base on the CRD device for deferent LED light solution.These solutions not only ensure that the LED works constantly,steadily and efficiently,but also reduce ...
... 高要求。采用传统单片机控制的LED显示屏，因其性能、运算速度 ... 极大的制约，已经不能满足LED显示屏发展的需要。近年来，随着 ... 本文以基于ARM的全彩LED显示屏控制系统为研究重点，结合 ... 所研究的基于ARM嵌入式全彩LED显示屏控制系统，得到了重庆市科委 ...
... 的太阳能光伏发电技术与发光二极管(LED)照明技术,都有着环保、节能、 ... 工作如下: 1.对光伏电源LED照明系统中太阳能光伏电池阵列的 ... 设计出脉冲恒流驱动的串联LED电路。 4.在前人工作 ...
... 延续了一百多年的发展，近年来LED（light-emitting diode）作为一种 ... 非常广阔的应用前景。目前，LED的小功率照明应用已经出初具规模 ... 研究在大功率照明领域的LED驱动解决方案。LED的发光亮度主要受其 ... 控制模式的优缺点；然后结合大功率LED照明的应用特点提出了采用PWM ...
照明是人类征服黑暗的工具，LED（Light-Emitting Diode）作为第四 ... 击穿。本文深入研究了LED的发展史，分析LED驱动技术的现状，并 ... 使用PWM调光以及软件滤波技术.LED驱动电路改进了BUCK-BOOST拓扑 ... 效果。关键词：BUCK-BOOST，大功率LED，水下照明，同步升降压， ...
... 不断提高，并且价格越来越低，LED广告屏作为一种新型信息显示 ... 广告屏的发展方向之一就是无线LED广告屏的设计与使用。 本论文提出的无线LED广告屏的设计方案是针对尚未 ... MSP430F149单片机为控制核心，实现 LED显示驱动、LED广告屏的无线通讯、 ...
