39‐3: Distinguished Student Paper: In‐Pixel Temperature Sensor for High‐Luminance Active‐Matrix Micro‐LED Display using LTPO TFTs

Abstract

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/℃. 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.