The characteristics of OLED backplanes including the intrinsic properties of a-Si TFTs and LTPS TFTs will be reviewed. While LTPS TFTs reveal satisfactory stability in AMOLED-display applications, a-Si AMOLEDs show better uniformity and are capable of driving OLEDs. However, the stability of a-Si TFTs under long-term operation is still unacceptable and remains to be the key issue constraining the commercialization of a-Si TFT AMOLEDs.

The characteristics including intrinsic property of a‐Si ‐TFT and LTPS TFT for the application used as OLED backplane are reviewed. Though a‐Si AMOLED shows better uniformity and is capable of driving OLED, the stability of a‐Si TFT under operation is still not acceptable, while LTPS TFT reveals satisfactory stability in AMOLED application. The stability of TFT under long‐term operation is remained to be the key issue for commercialization of a‐Si TFT AMOLED.

A phase-locked loop (PLL) with self-calibrated charge pumps (CPs) has been fabricated in a 3-μm lowtemperature polysilicon thin-film transistor (LTPS-TFT) technology. A voltage scaler and self-calibrated CPs are used to reduce the static phase error, reference spur, and jitter of an LTPS-TFT PLL. This PLL operates from 5.6 to 10.5 MHz at a supply of 8.4 V. Its area is 18.9 mm 2 , and it consumes 7.81 mW at 10.5 MHz. The measured static phase error without and with calibration is 80 and 6.56 ns, respectively, at 10.5 MHz. The measured peak-to-peak jitter without and with calibration is 3.573 and 2.834 ns, respectively. The measured reference spur is −26.04 and −30.2 dBc without and with calibration, respectively. The measured maximal locked time is 1.75 ms. Index Terms-Calibration, charge pump (CP), low-temperature polysilicon thin-film transistor (LTPS-TFT), phase-locked loop (PLL).

Rationale: Hemophagocytic lymphohistiocytosis (HLH) is a life-threatening hyperinflammatory syndrome that can be caused by bacterial infection. Streptococcus suis (S. suis) is a zoonotic pathogen that can cause severe disease in both pigs and humans. We report the first-ever documented case of HLH secondary to S. suis infection. Patient concerns: A 12-year-old girl presented with fever, rash, hepatosplenomegaly, pancytopenia, and elevated levels of ferritin and soluble CD25. Bone marrow examination revealed hemophagocytosis. Blood culture was positive for S. suis . Diagnosis: A diagnosis of hemophagocytic syndrome due to S. suis was established. Interventions: We treated the patient with intravenous immunoglobulin, intravenous imipenem, and supportive care. Outcomes: The patient eventually showed complete recovery. Lessons: Inflammatory response plays an important role in S. suis infection. Aberrant inflammatory response to S. suis infection may induce HLH. This case report illustrates that early definitive diagnosis and prompt treatment is a key imperative in patients with suspected S. suis infection.

We have developed a new AMLCD with multiple ambient light sensors (ALSs) for reducing backlight (BL) power consumption, and false sensing of ambient illuminance. ALSs perform well in showing BL control for power-saving, even though one of the sensors is covered by a finger shadow. Architecture of integrated ALS with a-Si and LTPS technologies are presented. We fabricate the in-cell, and wide-dynamic-sensing ALSs display using new light sensor technology. Photo-electrical characteristics with well linearity and reliability under long-term operation were observed.