A top-down design methodology is proposed for the design of TFT-LCD one-chip driver ICs,and a 260k color, 176RGB× 220-dot TFT-LCD one-chip driver IC is successfully developed with silicon verification. This IC is...A top-down design methodology is proposed for the design of TFT-LCD one-chip driver ICs,and a 260k color, 176RGB× 220-dot TFT-LCD one-chip driver IC is successfully developed with silicon verification. This IC is a typical mixed-signal VLSI and is implemented by a 0.18μm HV CMOS process. The static power dissipation is about 5mW for 260k color display mode,and the settling time of the output grayscale voltages within 0.2% error is less than 26μs.展开更多
A SPICE sub-circuit model is developed for high-voltage LDMOS transistors integrated in PDP driver ICs. The model accounts for intrinsic LDMOS phenomena such as the quasi-saturation effects, voltage-dependent drift re...A SPICE sub-circuit model is developed for high-voltage LDMOS transistors integrated in PDP driver ICs. The model accounts for intrinsic LDMOS phenomena such as the quasi-saturation effects, voltage-dependent drift resistance, self-heating effects, and Miller capacitance. In contrast to most physical or sub-circuit models, the proposed model not only provides precise simulated results,but also brings a very fast modeling procedure. Furthermore,the model also can be embedded in a commercial SPICE simulator easily. The simulation results using the presented models agree well with the measured ones and the error is less than 5%.展开更多
An area-saving and high power efficiency charge pump is proposed, and methods for optimizing the operation frequency and improving the power efficiency are discussed. Through sharing coupling capacitors the proposed c...An area-saving and high power efficiency charge pump is proposed, and methods for optimizing the operation frequency and improving the power efficiency are discussed. Through sharing coupling capacitors the proposed charge pump realizes two DC-DC functions in one circuit, which can generate both positive and negative high voltages. Due to sharing of the coupling capacitors, as compared with a previous charge pump designed by us for a TFT-LCD driver IC, the die area and the amounts of necessary external capacitors are reduced by 40% and 33%, respectively. Furthermore, the charge pump＇s power efficiency is improved by 8% as a result of employing the new topology. The designed circuit has been successfully applied in a one-chip TFT-LCD driver IC implemented in a 0.18 μm low/mid/high mixed-voltage CMOS process.展开更多
From 2002 through 2008 the secular rate of de-creasing sea ice area in the northern hemisphere accelerated by a factor of 18, whereas the secular rate of increasing sea ice area in the southern hemisphere accelerated ...From 2002 through 2008 the secular rate of de-creasing sea ice area in the northern hemisphere accelerated by a factor of 18, whereas the secular rate of increasing sea ice area in the southern hemisphere accelerated by a factor of 16, relative to the rates from 1978 through 2007. These were derived from the daily sea ice area retrieved from the Scanning Multi-channel Microwave Radiometer – Special Sensor Microwave/Imager and the Advanced Microwave Scan- ning Radiometer for the Earth Observation Sys- tem. The “annual” cycle of northern and southern sea ice areas, the number of days between maxima and minima is 372.4, on average, a frequency modulation, with a recurrence interval of 61.7 years. Significant spectral power occurs at the quasi-4-day through 120-day frequencies. The frequency content and modulation of the daily time series’ are consistent inter-monthly to inter-seasonal frequencies of solar irradiance, atmospheric-oceanic Rossby waves, length-of- day, and polar motion. This suggests conserva-tion of angular momentum of the atmosphere – sea-ice – ocean system. The near 60-year modu- lation and analysis of the detrended daily time series of the Arctic and Antarctic sea ice areas suggest the accelerations shown by the secular trends are relatively short-lived and reversible within an interval of one-quarter (15-years) to one-half (30-years) of the modulation period.展开更多
文摘A top-down design methodology is proposed for the design of TFT-LCD one-chip driver ICs,and a 260k color, 176RGB× 220-dot TFT-LCD one-chip driver IC is successfully developed with silicon verification. This IC is a typical mixed-signal VLSI and is implemented by a 0.18μm HV CMOS process. The static power dissipation is about 5mW for 260k color display mode,and the settling time of the output grayscale voltages within 0.2% error is less than 26μs.
基金the National High Technology Research and Development Program of China(No.2004AA1Z1060)~~
文摘A SPICE sub-circuit model is developed for high-voltage LDMOS transistors integrated in PDP driver ICs. The model accounts for intrinsic LDMOS phenomena such as the quasi-saturation effects, voltage-dependent drift resistance, self-heating effects, and Miller capacitance. In contrast to most physical or sub-circuit models, the proposed model not only provides precise simulated results,but also brings a very fast modeling procedure. Furthermore,the model also can be embedded in a commercial SPICE simulator easily. The simulation results using the presented models agree well with the measured ones and the error is less than 5%.
基金Project supported by the National High Technology Research and Development Program of China (No.2005AA1Z1193)
文摘An area-saving and high power efficiency charge pump is proposed, and methods for optimizing the operation frequency and improving the power efficiency are discussed. Through sharing coupling capacitors the proposed charge pump realizes two DC-DC functions in one circuit, which can generate both positive and negative high voltages. Due to sharing of the coupling capacitors, as compared with a previous charge pump designed by us for a TFT-LCD driver IC, the die area and the amounts of necessary external capacitors are reduced by 40% and 33%, respectively. Furthermore, the charge pump＇s power efficiency is improved by 8% as a result of employing the new topology. The designed circuit has been successfully applied in a one-chip TFT-LCD driver IC implemented in a 0.18 μm low/mid/high mixed-voltage CMOS process.
文摘From 2002 through 2008 the secular rate of de-creasing sea ice area in the northern hemisphere accelerated by a factor of 18, whereas the secular rate of increasing sea ice area in the southern hemisphere accelerated by a factor of 16, relative to the rates from 1978 through 2007. These were derived from the daily sea ice area retrieved from the Scanning Multi-channel Microwave Radiometer – Special Sensor Microwave/Imager and the Advanced Microwave Scan- ning Radiometer for the Earth Observation Sys- tem. The “annual” cycle of northern and southern sea ice areas, the number of days between maxima and minima is 372.4, on average, a frequency modulation, with a recurrence interval of 61.7 years. Significant spectral power occurs at the quasi-4-day through 120-day frequencies. The frequency content and modulation of the daily time series’ are consistent inter-monthly to inter-seasonal frequencies of solar irradiance, atmospheric-oceanic Rossby waves, length-of- day, and polar motion. This suggests conserva-tion of angular momentum of the atmosphere – sea-ice – ocean system. The near 60-year modu- lation and analysis of the detrended daily time series of the Arctic and Antarctic sea ice areas suggest the accelerations shown by the secular trends are relatively short-lived and reversible within an interval of one-quarter (15-years) to one-half (30-years) of the modulation period.
文摘文章叙述了ACF(Anisotropic Conductive Film,各向异性导电膜)与驱动IC(Integrated Circuit,集成电路)芯片封装的历史,并强调了驱动IC封装在实现显示器微型化、高分辨率、低成本及高显示质量等方面的重要性。文章还对微细间距COF(Chip on Flex)连接用ACF的材料设计进行了介绍。文章指出低温固化ACF可以改善LCD(Liquid Crystal Display,液晶显示屏)模块的生产效率,降低大型LCD模块表面的热应力;同时指出COG(Chip on Glass)连接后LCD面板的翘曲变形引起LCD模块漏光事故。ACF焊接温度的降低可以有效减少翘曲变形,避免在应用COG封装大型LCD模块的驱动IC时所产生漏光。
