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1. 上海电力学院 能源与环境工程学院 上海,200090
2. 上海天逸电器有限公司 上海,201611
3. 上海大学 新型显示技术及应用集成教育部重点实验室 上海,200072
收稿日期:2011-11-08,
修回日期:2011-11-24,
网络出版日期:2012-04-15,
纸质出版日期:2012-04-15
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张建平, 吴亮, 成国梁, 周廷君, 朱文清. 基于BRM的白光OLED恒定与步进应力加速寿命试验研究[J]. 液晶与显示, 2012,(2): 187-192
ZHANG Jian-ping, WU Liang, CHENG Guo-liang, ZHOU Ting-jun, ZHU Wen-qing. Constant-Step Stress Accelerated Life Tests of White OLED by BRM[J]. , 2012,(2): 187-192
为了获得白光OLED的寿命信息
通过加大电流应力开展了二组恒定和一组步进应力相组合的加速寿命试验。采用威布尔函数描述白光OLED的寿命分布
利用双线性回归法(BRM)估计出威布尔参数
确定了加速寿命方程
对白光OLED寿命是否符合威布尔分布进行了Kolmogorov-Smirnov检验
并利用自行开发的寿命预测软件计算出平均寿命和中位寿命。数值结果表明
恒定步进应力加速寿命试验方案是切实可行的
白光OLED的寿命服从威布尔分布
寿命应力关系满足线性Arrhenius方程
精确计算的加速参数可实现在短时间内OLED寿命的预测。
In order to acquire the life information of white OLED
two constant and one step stress accelerated life tests (ALT) were conducted with current stress increased. Weibull Distribution function was applied to describing the life distribution
Bilinear Regression Method (BRM) was employed to estimate the Weibull parameters
and the accelerated life equation was determined. The Kolmogorov-Smirnov test was performed to verify whether the White OLED life met the Weibull distribution or not
and the software developed by authors was used to calculate the average life and median life. The numerical results indicate that the test plans of constant-step ALT are feasible and versatile
that the OLED life follows the Weibull distribution
and that the life-stress relationship satisfies linear Arrhenius equation completely. The precise accelerated parameter is shown to be particularly useful to predict the OLED life within shorter time.
袁永波, 连加容, 周翔. 空穴阻挡层对有机发光二极管寿命的影响 [J]. 电子器件, 2008, 31(1): 25-28.[2] 郭朋辉. OLED器件技术及产业化进展. 技术论坛, 2010,(1):46-50.[3] 冯迪砂, 吴斌. OLED显示技术综述 [J]. 福建电脑, 2006,(5):28-30.[4] 许伟. 寿命是目前OLED最大技术难点. 中国电子报, 2008-01-01(8).[5] 陈循, 张春华. 加速试验技术的研究、应用与发展 [J]. 机械工程学报, 2009, 45(8):130-136.[6] 黄婷婷, 姜同敏. 加速寿命试验中统计加速模型综述 [J]. 装备环境工程, 2010,7(4):57-62.[7] Eisenbrand F, Karrenbauer A, Xu C H. Algorithms for longer OLED lifetime [J]. Lecture Notes in Computer Science, 2007,4525:338-351.[8] Sakariya K, Ng C K M, Servati P, et al. Accelerated stress testing of a-Si:H pixel circuits for AMOLED displays [J]. IEEE Transactions on Electron Devices, 2005,52(12):2577-2583.[9] Juan C J, Tsai M J. Implementation of a novel system for measuring the lifetime of OLED panels [J]. IEEE Consume Electronics, 2003, 49(1): 1-2.[10] Jong In Park, Suk Joo Bae. Direct prediction methods on lifetime distribution of organic light-emitting diodes from accelerated degradation tests [J]. IEEE Transactions on Reliability, 2010, 59(1):74-90.[11] 李书明, 董成利, 黄燕晓. 基于威布尔的发动机涡轮叶片寿命可靠性评估 [J]. 中国民航大学学报, 2008, 26(4): 14-17.[12] 茆诗松. 加速寿命试验的加速模型 [J]. 质量与可靠性, 2003, (2):15-17.[13] Zhang J P, Wang R T. Reliability life prediction of VFD by constant temperature stress accelerated life tests and maximum likelihood estimation [J]. J. Testing and Evaluation, 2009, 37(4):316-320.[14] 张建平, 武文丽, 朱文清. Weibull分布下基于MLE的红外发光二极管寿命预测 [J]. 半导体光电, 2011, 32(1):47-51.[15] Barr D R, Davidson T. A Kolmogorov-Smirnov test for censored samples [J]. Techno metrics, 1973, 15(4):739-757.
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