Copyright © All rights reserved. Made by VBC.       

Deepak
Professor,
 Materials Science and Engineering,
 Indian Institute of Technology-Kanpur ,
 Work Phone: (512) 2597353,
 Email: saboo[at]iitk.ac.in

Gokaran Nath Shukla’s Thesis

Home
Thesis  Topic:
 Thermal modeling of organic light emitting diode display panels
Now days, thermal management problem in OLED display panel is drawing a special attention of engineers and scientists. On large scale display panel, the level of complexity of geometry coupled with available hardware resources put further constraints, which limit the scope to get very accurate and time bound numerical solutions. In this work, an attempt has been made for the simulation of heat extraction of OLED display panel, using COMSOL software package. OLED based display panel constituted from complex geometries have very large variation in sizes, which typically varies from 10-7 m to 10-2 m.  It creates very high aspect ratio which not only create a unavoidable situation during  creation of geometry of active display, but also at the time of  mesh generation, it “forced” the  mesher to generate maximum number of unnecessary nodes to resolve very fine details  of OLED display panel. So, to simulate exact geometry which includes every minute detail of OLED configurations is not possible on normal machine. Therefore during simulations, a simplification has been made in geometries and in thermal conductivity. Instead of using discrete volumetric heat sources, an effective, uniform homogeneous volumetric heat source has been used. During the simulation, Lagrange cubic element shape function has been used to improve the accuracy of result. Along the boundary of active display, a weak constraint has been used which further improve the numerical result. After simulation, the maximum temperature zone in active display has been found out. A natural and forced convection process has been used to cool the OLED display panel.