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Thin-Film Transistors Fabricated on Intentionally Agglomerated, Laser-Crystallized Silicon on Insulator
Published in Laurent A. Francis, Krzysztof Iniewski, Novel Advances in Microsystems Technologies and Their Applications, 2017
Laser-induced melting and recrystallization of silicon films, typically referred to as laser crystallization, have been established as the preferred method to obtain high-mobility silicon metal-oxide-semiconductor field-effect transistors (MOSFETs) on glass substrates. The fabrication of such semiconductor devices on glass and other low-temperature-compatible substrates is of primary importance for the flat-panel display industry. Active-matrix (AM) displays, employing one or more thin-film transistors (TFTs) per pixel, are the standard circuit architecture in high-resolution displays, for all mainstream display technologies used to emit or modulate light (such as liquid crystal and light-emitting diode).
Input and Output Devices
Published in Julio Sanchez, Maria P. Canton, Embedded Systems Circuits and Programming, 2017
Julio Sanchez, Maria P. Canton
In high-resolution and color LCDs, an active matrix is used. In this design, a grid of thin-film transistors is added to the polarizing and color filters. Each pixel contains its own dedicated transistor, and each row line and column line is addressed individually. During the refresh cycle, each pixel row is activated sequentially. Active matrix displays are brighter and sharper and have quicker response times than a passive matrix. Active matrix displays are also known as thin - film - transistor or TFT displays.
Circuit Components
Published in Julio Sanchez, Maria P. Canton, Microcontroller Programming, 2018
Julio Sanchez, Maria P. Canton
In high-resolution and color LCDs an active matrix display is used. In this design a grid of thin-film transistors is added to the polarizing and color filters. Each pixel contains its own dedicated transistor and each row line and column line is addressed individually. During the refresh cycle each pixel row is activated sequentially. Active matrix displays are brighter and sharper and have quicker response time than passive matrix. Active matrix displays are also known as thin-film-transistor or TFT displays.
Amide linkage in novel three-ring bent-core molecular assemblies: polar mesophases and importance of H-bonding
Published in Liquid Crystals, 2018
Golam Mohiuddin, Sharmistha Ghosh, Nazma Begum, Somen Debnath, Srikanth Turlapati, Doddamane Sreenivasamurthy Shankar Rao, Rao V. S. Nandiraju
In active matrix displays (AMDs) the contrast and flickering are controlled by the high voltage holding capability of the liquid crystalline materials in matrix elements. In TFT-LCD applications, the voltage holding ratio (VHR) is the crucial requirement to avoid the image sticking [74]. The ratio of the voltages at a pixel at the end and the beginning of the frame time is related to VHR [75,76]. Furthermore, the VHR values can be correlated with electrostatic potentials (ESP) and hence an even charge distribution correlates reasonably well with the high voltage holding ratio of the material. Figures 12(a,b) display the isoelectron density surface of 10-2Cl-12 and 10-2Me-12, respectively. In both the molecules, the positive electrostatic potential is homogenously distributed except two negative ESP centres [77] (orange and light red colour contours of imine nitrogen and imide oxygen atoms respectively) favouring weak interactions with positively charged cations. The absence of a red coloration in the ESP contour in the majority surface area of the molecule denotes a relatively high VHR value. The red colour contour of imide oxygen promotes hydrogen bonding rather than an interaction with a cat ion. The isoelectron density surface of 10-2Cl-12 dimer displayed in Figure S5 (ESI) also confirms the importance of imide oxygen. Hence homogenous distribution of partial charges lowers the ability to form cationic complexes by local electrostatic interactions and correlates reasonably well with the high VHR of the material. From the total ESP surface it is clear that the electron density is almost homogeneously distributed in molecules which indicate the applicability of this type of molecule in mixtures in TFT-LCD displays and also gives an indication to the design of these type of molecules.