Abstract
We proposed an IGZO TFT-based micro light-emitting diode (μLED) pixel circuit using a stepwise control signal. The proposed pixel circuit expressed the gray levels by modulating the emission time with the constant driving current to suppress a wavelength shift of μLEDs. The proposed pixel circuit successfully expressed 8-bit grayscale using a quaternary digital driving. The simulated μLED current waveforms showed a delay time of approximately 2 μs. Furthermore, the proposed circuit exhibited a luminance error rate below 5% under a threshold voltage variation of ±1 V.
| Original language | English |
|---|---|
| Pages (from-to) | 1495-1498 |
| Number of pages | 4 |
| Journal | Digest of Technical Papers - SID International Symposium |
| Volume | 54 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2023 |
| Externally published | Yes |
| Event | SID International Symposium Digest of Technical Papers, 2023 - Los Angeles, United States Duration: 21 May 2023 → 26 May 2023 |
Keywords
- IGZO TFT
- Micro light-emitting diode
- pixel circuit
- quaternary digital driving
- stepwise control signal