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39‐3: Distinguished Student Paper: In‐Pixel Temperature Sensor for High‐Luminance Active‐Matrix Micro‐LED Display using LTPO TFTs
Author(s) -
Chen Yuanfeng,
Lee Suhui,
Kim Hyunho,
Lee Jiseob,
Geng Di,
Jang Jin
Publication year - 2020
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.13929
Subject(s) - active matrix , luminance , materials science , pixel , optoelectronics , thin film transistor , sensitivity (control systems) , liquid crystal display , computer science , electronic engineering , nanotechnology , artificial intelligence , engineering , layer (electronics)
We propose an in‐pixel temperature sensor using LTPO TFTs for high luminance AM micro‐LED displays. By taking advantage of the different off‐current characteristics of p‐type LTPS TFTs and n‐type a‐IGZO TFTs under temperature change, we designed and fabricated a temperature sensor consists of only LTPO TFTs without additional sensing component or material. The fabricated sensor exhibits excellent temperature sensitivity of up to 71.8 mV/°C. In addition, a 64 x 64 temperature sensor array with 3T sensing pixel and integrated gate driver has also been fabricated, which demonstrates potential approach for maxing out the performance of high‐luminance AM micro‐LED display with real‐time in‐pixel temperature monitoring.