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首页> 外文会议>Conference on Light-Emitting Diodes: Research, Manufacturing, and Applications VII Jan 27-29, 2003 San Jose, California, USA >'Maximizing Lumen Output of LEDs for Automotive Exterior Signal Lighting Applications'
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'Maximizing Lumen Output of LEDs for Automotive Exterior Signal Lighting Applications'

机译：“最大化用于汽车外部信号照明应用的LED流明输出”

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摘要

Light emitting diodes (LEDs) operated at relatively low currents when first used for automotive exterior signal lighting. These devices were generally the 3mm or 5mm LEDs that were lighted with an input current of no more than 30 milliamperes per LED. Generally these LEDs were used in center high mounted stop lamps or side marker lamps. In most cases the center high mounted stop lamps required 30 to 70 of these low powered devices depending on LED type, location on the vehicle and customer requirements. Today LEDs are being used for not only the center high mounted stop lamp, but literally all exterior automotive signal lamps. These LEDs are exceedingly brighter than the 3mm or the 5mm devices were. These brighter devices require the use of fewer LEDs per lamp function, but at the expense of requiring higher drive currents thus generating more heat. It is this heat generation that creates an issue that must be addressed by the lamp designer. The heat being generated by the latest generation of LED devices must be removed to ensure that the device maintains its capabilities to efficiently generate light. To enable the LED to operate efficiently certain factors of the LED must remain unchanged as it is operated over the life of the lamp in an automotive application. Two factors that must experience little or no change are the lumen output of the LED and the emitted color. The heat issue must be analyzed and eliminated or controlled when utilizing the newest "high power," high current devices in an automotive exterior signal lamp. The scope of this paper will identify the parameters that must be controlled to minimize the heat generated by the chip such that the light output of these latest "high power" LEDs is maximized and maintained.
机译：发光二极管（LED）首次用于汽车外部信号照明时，其工作电流相对较低。这些设备通常是3mm或5mm的LED，每个LED的输入电流不超过30毫安。通常，这些LED用在中央高位停车灯或侧面标志灯中。在大多数情况下，根据LED的类型，车辆上的位置以及客户的要求，中央高位停车灯需要这些低功率设备中的30至70。今天，LED不仅用于中央高位停车灯，而且实际上还用于所有外部汽车信号灯。这些LED的亮度比3mm或5mm设备的亮度高得多。这些较亮的设备每个灯功能需要使用更少的LED，但以需要更高的驱动电流为代价，从而产生更多的热量。正是这种发热产生了灯设计师必须解决的问题。最新一代LED设备产生的热量必须去除，以确保该设备保持有效发光的能力。为了使LED高效运行，LED的某些因素必须在汽车应用中的灯的使用寿命内保持不变。必须经历很少或没有变化的两个因素是LED的流明输出和发出的颜色。当在汽车外部信号灯中使用最新的“大功率”大电流设备时，必须分析，消除或控制热量问题。本文的范围将确定必须控制的参数，以最大程度地减少芯片产生的热量，从而最大程度地保持这些最新的“高功率” LED的光输出。

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