Accelerated Life Test of high luminosity blue LEDs
نویسندگان
چکیده
منابع مشابه
Degradation of AlInGaP red LEDs under drive current and temperature accelerated life tests
AlInGaP LEDs are widely used in illumination applications as automotive and signalization due their low consumption and high durability. In order to verify the high durability data it is necessary to consider not only catastrophic failures but also degradation. In this work LEDs degradation at different temperature and drive current accelerated tests have been analyzed. In all the tests we have...
متن کاملEffect of Thermal Properties of Die Attach Materials on Performance of High Power Blue Leds
InGaN-based High Power blue LEDs exhibit a maximum light conversion efficiency of 40%, which decreases further at high drive currents. Thus, more than 60% of the electrical input power is dissipated as heat in an LED chip, leading to a rise in the junction temperature of the LED. Junction temperature has a significant impact on the light conversion efficiency of the LEDs. Also, it reduces LED l...
متن کاملthe test for adverse selection in life insurance market: the case of mellat insurance company
انتخاب نامساعد یکی از مشکلات اساسی در صنعت بیمه است. که ابتدا در سال 1960، توسط روتشیلد واستیگلیتز مورد بحث ومطالعه قرار گرفت ازآن موقع تاکنون بسیاری از پژوهشگران مدل های مختلفی را برای تجزیه و تحلیل تقاضا برای صنعت بیمه عمر که تماما ناشی از عدم قطعیت در این صنعت میباشد انجام داده اند .وهدف از آن پیدا کردن شرایطی است که تحت آن شرایط انتخاب یا کنار گذاشتن یک بیمه گزار به نفع و یا زیان شرکت بیمه ...
15 صفحه اولDesign of Accelerated Life Test Plans—Overview and Prospect
Accelerated life test (ALT) is currently the main method of assessing product reliability rapidly, and the design of effi‐ cient test plans is a critical step to ensure that ALTs can assess the product reliability accurately, quickly, and economi‐ cally. With the promotion of the national strategy of civil‐military integration, ALT will be widely used in the research and development (R&D) of va...
متن کاملBlue LEDs get the Nobel Prize while Red LEDs are poised to save lives
Ischemic heart disease is a major public health epidemic and a leading cause of morbidity and mortality worldwide (Hausenloy et al., 2012; Ferdinandy et al., 2014). Ischemic injury predisposes to myocardial infarction, heart failure, arrhythmias, and sudden cardiac death. Prompt restoration of oxygenated blood flow to the ischemic myocardium (i.e., reperfusion) is required for preventing irreve...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Microelectronics Reliability
سال: 2016
ISSN: 0026-2714
DOI: 10.1016/j.microrel.2016.07.021