A Pixel Circuit With Wide Data Voltage Range for OLEDoS Microdisplays With High Uniformity

Self Cite

This paper demonstrates a novel low‐temperature‐poly‐Si thin‐film transistors (LTPS TFTs) gate driver with tunable width for low‐grey level brightness adjustment of active‐matrix organic light‐emitting diode (AMOLED) display. The width of output pulses can be tuned accordingly by changing the number of input pulses, to avoid changing the frequency, duty ratio, or increasing the numbers of the external clock‐lines. The proposed circuit still works well when outputting 10 ms pulse with leakage current above 1.45 nA.

Section: Introductionmentioning

confidence: 99%

“…Figure 6. show simulation results of low-level maintenance performances of EM1 for different W/L of T1b.…”

mentioning

confidence: 99%

15‐2: Student Paper: Programmable LTPS‐TFT Gate Driver with Tunable Pulse Width for Adjusting AMOLED Brightness

Liao

Yang

et al. 2021

Self Cite

“…A pixel circuit used in traditional OLEDoS microdisplays adopts a current-driving method by controlling the gate-source voltage difference of a driving transistor to generate a current to drive OLED to emit light [1][2][3][4][5]. This method is unfavorable to generate pA-level current.…”

Section: Introductionmentioning

confidence: 99%

“…The design complexity of the OLEDoS microdisplay driving circuit is therefore increased. [1][2][3] use capacitors to form a voltage divider to widen the programming voltage by only transferring part of the programming voltage to the gate of the driving transistor of the pixel circuit. [5] generates a higher current, then uses PWM (Pulse Width Modulation) signal to control the average current passing through the OLED.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

14‐3: OLEDoS Microdisplay with OLED Threshold Voltage Detection and Fast‐Progressive Compensation

Lam

Qiu

et al. 2021

Self Cite

An OLEDoS microdisplay system is proposed in this paper, which includes a voltage‐driving pixel circuit, an OLED threshold voltage detection method, and a fast‐progressive compensation scheme. The measurement result shows that the range of the programming display voltage of the proposed voltage‐driving pixel circuit is 5.15 times larger than the gate‐source voltage difference of the driving transistor. The measured lowest current of a pixel can be as low as 2.89 pA.

P‐15: Student Poster: Reliable Gate Driver for Real‐Time External Compensated AMOLED Display Using InGaZnO TFTs

Yang

Huang

Liao

et al. 2021

Self Cite

The a‐IGZO TFTs integrated gate driver circuit with inter‐frame memory module and isolated bootstrapping node structure is proposed for AMOLED display. The driver can provide progressive display signal, inter‐frame detection signal and standby detection signal. Compared with conventional ones, the proposed inter‐frame memory shows enhanced driving ability due to the introduce of voltage bootstrapping function. Besides, the proposed gate driver can tolerate larger threshold voltage variations (ΔVth) than the conventional circuit due to the isolated bootstrap node structure.