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To enhance the visual quality of an image that is degraded by uneven light, an effective method is to estimate the illumination component and compress it. Some previous methods have either defects of halo artifacts or contrast loss in the enhanced image due to incorrect estimation. In this paper, we discuss this problem and propose a novel method to(More)
The base-emitter junction voltage of bipolar transistor, in generally the forward voltage of a pn-junction, exhibits negatives temperature-coefficient, which is about -1.5mVlaC [6], [7]. The difference between the base-emitter junction voltages of two bipolar transistors operating at different current density is directly proportional to the absolute(More)
Reflectance spectrum calculations for a MgF<inf>2</inf>/diamond-like carbon(DLC)/DLC(or porous silicon (PS) ) silicon triple layer antireflection coating(ARCs) and the nanoporous silicon dioxide (NPSiO<inf>2</inf>) / DLC/DLC(or PS) triple layer ARCs are performed using the matrix method. The results are compared with the corresponding spectrum of a silicon(More)
Analytical drain current expressions with self-heating effect are presented for undoped polycrystalline thin film transistors (poly-Si TFTs). Temperature dependence of threshold voltage and effective mobility is involved. The expressions are derived on the basis of a first order Taylor expansion and continuous from linear regime to saturation regime. The(More)