液晶与显示, 2014, 29 (5): 733, 网络出版: 2014-08-18
基于labVIEW的AM OLED显示屏测试系统
Test system of AMOLED display based on labVIEW
摘要
为方便对AM OLED显示屏的各项性能进行测试,本文设计了基于labVIEW(Laboratory Virtual Instrument Engineering Workbench实验室虚拟仪器工程平台)的AMOLED显示屏VIL曲线自动化测试系统,实现了在同一个软件下对显示屏的电压、电流、亮度、色坐标等特性的测试。首先,构建硬件电路即基于FPGA的AMOLED显示屏驱动电路。接着,在此基础上利用labVIEW平台设计了AMOLED显示屏VIL曲线测试系统的软件系统。最后,利用该系统对自主研发的基于MOTFT技术的122 cm(48 in)AMOLED显示屏进行了测试,验证了系统的可靠性。通过对测试结果进行分析,AMOLED显示屏达到设计亮度时各像素所需的数据电压约为92 V。总之,本系统实现了对显示屏性能参数的自动化测试,为显示屏的白平衡调节和AMOLED专用驱动芯片设计提供了数据支持,为显示屏的优化设计指明方向。
Abstract
In order to test the performance of AMOLED Display, an automatic VIL testing system based on virtual instrument technology was designed and used to acquire VIL curve. The perfor-mances of the AMOLED Display (such as voltagecurrent, brightness, chromaticity coordinates, etc) could be measured in the same software. First, we built the hardware circuit: the driving circuit based on FPGA for AMOLED Display. Then, a software system of VIL testing system based on virtual instrument technology was designed on this basis. Finally, we tested the 122 cm AMOLED Display based on MOTFT technology which is developed independently, and verified the reliability of the system. Through the analysis of the test results, the data voltage of each pixel was about 92 V when the brightness of AMOLED Display reached to the value of calculation.In brief, this system can achieve the automatic test of the Displays’ performance parameters and make an assessment on screenperformance. What’s more, it can not only provide reference data for the white balance adjustment and the design of AMOLED driver IC, but also show the direction for the optimization design on the screen.
马雪雪, 王春阜, 吴为敬, 彭俊彪. 基于labVIEW的AM OLED显示屏测试系统[J]. 液晶与显示, 2014, 29(5): 733. MA Xuexue, WANG Chunfu, WU Weijing, PENG Junbiao. Test system of AMOLED display based on labVIEW[J]. Chinese Journal of Liquid Crystals and Displays, 2014, 29(5): 733.