幸运飞艇5m3q

背光LED驱动系统的设计与应用分析
日期:2018-04-28 浏览

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发光二极管(LED)技术广泛用于为小尺寸液晶显示器中的像素提供照明( LCDs)在电池供电的应用中。由LED发出的白光通过偏振器传输到LCD,在那里可以阻挡或衰减光,并将其发送到RGB滤色器以产生彩色光。

背光LED驱动系统的设计与应用分析

图1:背光LED驱动系统。图1显示了背光LED驱动器的系统级视图,该驱动器由DC/DC转换器和一个或多个调节电流源组成。此外,基于RGB-LED的背光需要基于温度的反馈控制,这相当于比基于白光LED的背光更高的成本。可以使用多少PCB面积?需要什么功能?系统消耗多少电量?回答这些问题可以指导设计人员选择合适的背光LED驱动器。

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选择一个时要考虑的第一个方面用于电池供电应用的LED驱动器是IC驱动器与外部组件共占的总面积(图2)。

背光LED驱动系统的设计与应用分析

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