The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A novel pixel circuit with low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) for driving active-matrix organic light-emitting diode (AMOLED) displays is proposed. The pixel circuit is built on two adjacent pixels with six p-type LTPS-TFTs and a capacitor, and thus the equivalent circuit is 3T0.5C in each layout area, which has a superior aperture ratio. The pixel circuit can...
In this paper, we propose a novel image steganography technique with an adaptive embedding scheme that combines the methods of edge detection and hybrid Hamming codes to conceal a secret message in a cover image. We use the Canny edge detection algorithm to identify the sharpness degree of a block because the human visual system is more sensitive to the smooth regions than the sharp regions in the...
The effective polarized light, i.e., the amount of light participating in an actual liquid-crystal-display operation, was enhanced using a metal polarizer on a conventional nitride-based light-emitting-diode (LED) package. The optimal structure of the metal wire grid was demonstrated using finite-difference time-domain simulations; its performance was evaluated in terms of the polarization ratio and...
Amorphous fluoropolymer (FP), as a material for both insulating and hydrophobic coating, plays an essential role in electrowetting displays (EWD). In this work, three FPs based on Teflon AF1600, Hyflon AD60 and Cytop 809A were studied according to their influence on the EWD performance. Both water/air and oil/water contact angles were utilized to compare the surface wettability of these three FPs...
Touch screen technologies have become the mainstream of input interfaces for mobile devices. However, due to the small size screens, it is difficult to offer more than two inputs at the same time. In order to achieve input richness, this paper proposes a new sound-of-tapping (S-TAP) technology that is a novel user interface utilizing only microphones embedded in most mobile devices. S-TAP technology...
In this paper, we propose a variational multiframe super-resolution (SR) model based on a nonlocal regularization term using Bregman distances. Since the SR algorithms always skip the complex spatial interactions within images, we introduce a nonlocal form of the bilateral total variation (BTV) regularization term which can take into consideration these interactions and also efficiently preserve strong...
This paper proposes a new gate driver circuit using depletion mode a-IGZO TFTs. The proposed gate driver circuit can prevent Q node, the gate node of pull-up TFT, from discharging during the output pulse duration. For that purpose, our circuit applies sufficient negative gate-to-source bias (Vgs) to the switch TFTs connected to the Q node during that time. Consequently, the leakage current through...
An analytical threshold-voltage (Vth) shift model of amorphous InGaZnO thin-film transistors (a-IGZO TFTs) under positive gate bias stress (PGBS) is reported in this paper. It is demonstrated that electrons in active layers of a-IGZO TFTs can tunnel into gate insulators when PGBS is applied, and a portion of the tunneled electrons would tunnel back. The transfer distance of the tunneled electrons...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.