With the development of large‐scale and high‐resolution TFT‐LCD display products, higher requirements are put forward for display quality. Fine Pitch, cpd coupled horizontal stripe, and head shaking mura are several types of mura that have great impact on display quality. The relationship of pixel arrangement structure and display mura is analyzed in this paper. The advantages and disadvantages of several common pixel arrangements are summarized and some methods to avoid display mura are proposed.
This paper presents a millimeter wave (mm-wave) oscillator that generates signal at 36.56 GHz. The mm-wave oscillator is realized in a UMC 0.18 m CMOS process. The linear superposition (LS) technique breaks through the limit of cut-off frequency (f T /, and realizes a much higher oscillation than f T . Measurement results show that the LS oscillator produces a calibrated -37.17 dBm output power when biased at 1.8 V; the output power of fundamental signal is -10.85 dBm after calibration. The measured phase noise at 1 MHz frequency offset is -112.54 dBc/Hz at the frequency of 9.14 GHz. This circuit can be properly applied to mm-wave communication systems with advantages of low cost and high integration density.
This paper introduces a self‐contained ultra‐large In Cell Touch driving scheme, which can be applied in 43 inch, 86 inch and larger In Cell Touch products. This driving scheme divides the VCOM electrodes in the liquid crystal cell for traditional LCD into several Sensor blocks, uses display and touch time‐sharing to drive the signal, modulates the signal in Touch stage, and uses special communication protocol to achieve simultaneous touch effect of active pen and finger.
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