The RGB micro‐LED display has been demonstrated to withstand mechanical strain during out‐of‐plane periodically deformation. In this work, the high pixel density (>139‐PPI) and high strain tolerance of circuits were achieved by utilizing the novel design of the island‐bridge structure under the compact pixel arrangement. Light absorbent was adopted into a stretchable display to reduce ambient back light and ambient reflection for the dark mode of a panel
A 1.26″ circular plastic‐based AMOLED display has been developed for wearable application. By locating gate drivers in the active area and expending active area outside the circuit area of the panel, we successfully realized a display with true circular shape and 1mm slim border, respectively.
This paper reports the effect of off-state stress on the LTPS TFTs on plastic substrates. In this study, by giving LTPS devices off-state bias stress one millisecond, it could get an excellent off-state current from 50 pA to 2pA when device operate at VGS=+7V, VDS=-5.1V. This could be attributed to electron trapping occur in gate insulator could reduce off-state electric field near to drain region.
This paper presents design and test of a planar transformer using 0.18 μm CMOS technology with BALUN applications. To enhance the transformer coupling coefficient of the primary/secondary coil, the broadside-coupled structure is adapted while the circuit size is also minimized in chip area of 190 μm × 190 μm. The measured results based on the differential-/common-mode thru-reflect-line (TRL) calibration are shown and the associated transformer parameters including inductances and coupling coefficient are extracted. The additional BALUN application is performed as well in the frequency range of 1.6 GHz -12 GHz.
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