59.1: Invited Paper: LTPS Backplane Technologies for AMLCDs and AMOLEDs

Abstract

In this paper, we review various LTPS backplane technologies based on laser-crystallization and other related methods that have been applied to AMLCD and AMOLED displays. The TFT performances obtained by different melt-mediated crystallization methods with excimer laser and solid phase crystallization will be compared. The technical issues of the image quality and the resolution will be discussed.

31.2: Power Efficient 5.0‐inch 440ppi Full HD a‐Si TFT LCD Single‐Chip Driver IC

“…Figure 2 shows the proposed DC-DC converter architecture, which combines the capacitive charge pumping circuits and the inductive pulse frequency modulated (PFM) dc-dc converter circuits to enhance the power conversion efficiency and to get the stabilized output voltage levels even under the maximum power consumption conditions. Different from the DC-DC converter for AMOLED, whose loads lie on in-between medium and heavy and the PFM-PWM combined DC-DC converter design has been researched [2], the DC-DC converter design for a-Si TFT LCD GIP driving should support light and medium loads.…”

“…And the LTPS backplanes are thought to be suitable to support them [1][2]. But lowering fabrication cost is always required.…”

“…Due to the rapidly expanding smart phone market, higher resolution and higher definition displays are strikingly growing and demanded. And the LTPS backplanes are thought to be suitable to support them [1][2]. But lowering fabrication cost is always required.…”

Self-aligned offset gate poly-Si TFTs using photoresist trimming technology

“…Low temperature polycrystalline silicon (poly-Si) thin film transistors (TFTs) have much higher carrier mobility and better performance stability than amorphous silicon TFTs, and have been used for high definition or fully integrated active matrix flat panel display (AM-FPD) applications [1,2]. It is the superior driving capability and performance stability that makes the poly-Si TFT technology the only one currently used for fabricating active matrix organic light-emitting diode (AM-OLED) display devices in mass-production [3].…”

62.3: Six‐terminal OLED Display Using Low‐Temperature Single‐Crystal Silicon (LTSS) Technology

“…Promising materials for backplanes for AMOLED panels, such as low-temperature polysilicon (LTPS) [2,3] and continuous grain silicon (CG-silicon) [4,5], are all polycrystalline silicon. Polycrystalline silicon transistors have lower field-effect mobility than single-crystal silicon transistors, and thus can only be used for panels with a very small number of pixels.…”