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.
| Original language | English |
|---|---|
| Pages (from-to) | 559-562 |
| Number of pages | 4 |
| Journal | Digest of Technical Papers - SID International Symposium |
| Volume | 51 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2020 |
| Event | 57th SID International Symposium, Seminar and Exhibition, Display Week, 2020 - Virtual, Online Duration: 3 Aug 2020 → 7 Aug 2020 |
Bibliographical note
Publisher Copyright:© 2020 SID.
Keywords
- In-pixel temperature sensing
- Low-temperature polycrystalline silicon and oxide (LTPO)
- Micro light emitting diode (micro-LED) display
- Thin-film transistor (TFT)