LTPS circuit integration for system‐on‐glass LCDs

Abstract

A 3.5-in. QVGA-formatted driving-circuit fully integrated LCD has been developed using low-temperature poly-Si (LTPS) technology. This display module, in which no external ICs are required, integrates all the driving circuits for a six-bit RGB digital interface with an LTPS device called a "FASt LDD TFT" and achieves a high-quality image, narrow frame width, and low power consumption. The LTPS process, device, and circuit technologies developed for system-on-glass LCD discussed. The development phase of LTPS circuit integration for system-on-glass LCDs is also reviewed.

P.4: A Charge‐Cyclic Digital‐to‐Analog Converter for IGZO TFT Integrated Data Driver

“…It is observed that even V T shift happens, by the end of every conversion procedure, V M can still be fully charged. As a result, V O can be generated according to (1). However, if ΔV T is increased to 5V, the charging time for V M becomes insufficient.…”

“…System on panel (SoP) has attracted enormous attentions in FPD field due to potentially enabling a significant improvement on performance, cost and reliability [1], [2]. The primary stage of fulfilling the SoP is the implementation of the integrated scan and data drivers with TFT technology.…”

A Charge-Sensing-Capable Source Driver for TFT Array Testing in System-on-Panel Displays

“…To lower the assembly cost and reduce the display form factor, the trend is to integrate the peripheral circuits and the TFT array on the same substrate (usually glass). Recently, system-on-panel displays with built-in drivers and even the control and timing circuits have been reported [8], [9], [10], [11]. While these highly integrated systems have reduced form factors and enhanced robustness, they pose new challenges to array testing.…”

Low power low temperature poly-Si thin-film transistor shift register with DC-type output driver

“…Since low temperature poly-Si (LTPS) thin film transistors (TFTs) were introduced, many researches on system-on-glass (SOG) have been conducted due to high mobility of around 100 cm 2 /V s, where gate drivers, source drivers, timing controller, power circuits, memories, and sensors have been integrated on a glass [1][2][3][4]. However, at present, only gate drivers have been embedded in mass-produced active matrix flat panel displays with amorphous Si, LTPS, and oxide TFTs because they can be implemented with relatively simple and small-size digital circuit techniques compared to other circuits [5][6][7][8][9].…”