High Speed and Wider Swing, Level Shifter Using Low-Temperature Poly-Silicon Oxide TFTs

25‐2: LTPO TFT Technology for Level Shifter Integrated Gate Driver in UHD 4K Displays

“…3(d)) and operational in the broad clock frequency range of (1-500) kHz. For an input swing of (2-10) V, the LTPO LS shows a shifted output swing of (10-30) V with the full 'rail-torail' character [2]. Previously, level shifter integrated gate driver is realized with a-Si TFTs [10], a-IGZO depletion-mode TFTs [11]- [12] or with LTPS TFTs [13].…”

“…Low-Temperature Poly-Si (LTPO) thin-film transistor (TFT) technology is becoming a new sensation for the Active Matrix Organic Light-Emitting Diodes (AMOLED) and Ultra-High-Definition (UHD) displays [1]. Usually the oxide TFT exhibits ultra-low off-state leakage current < 10 -14 A, decent high mobility over 10 cm 2 /V.s, and can be manufactured at low temperature with low manufacturing cost [2]. LTPS TFT is proud of high mobility and excellent stability [3] although high off-state current (~ 10 -12 A) still reckons a weak point.…”

“…However, gate drive circuits with this technology not yet realized to the best of our knowledge. In very recent, we report a high-speed and wider swing level shifter (LS) through this technology [2]. In this work, we fabricate a 16-stage 2-clock conventional CMOS shift register (SR).…”

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

“…We have recently developed a low cost LTPS process using blue laser annealing (BLA) technology instead of ELA [5], and a shared gate process to reduce the number of masks required in the LTPO process, which can reduce the manufacturing cost. A few highperformance circuits using our LTPO process have also reported [6][7], which present the potentiality of this emerging technology.…”

High refresh rate and low power consumption AMOLED panel using top‐gate n‐oxide and p‐LTPS TFTs

“…Beside, using oxide and LTPS transistors in panel circuits for low power consumption display has been reported 6–12 . In this paper, we have proposed high refresh rate and low power consumption OLED panel, by simultaneously utilizing both p‐LTPS and n‐type indium–gallium–zinc–oxide (n‐IGZO).…”