共查询到20条相似文献,搜索用时 15 毫秒
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为优化交流等离子体显示器(AC PDP)的单元结构和驱动电压,采用光谱测量系统和交流等离子体显示器宏单元对电极结构参量、带有浮动电极的新型单元结构及维持电压脉冲参量对Ne-Xe混合气体放电辐射的红外光谱的影响进行了实验研究。结果表明,随着维持电极宽度增加,单元放电辐射的828 nm红外光谱的强度提高,而其辐射效率基本保持不变;随着维持电极间隙增大或在维持电极间加有适当宽度的浮动电极,红外辐射光谱的强度及其辐射效率均提高;提高维持电压脉冲频率或幅度,可增加红外辐射强度,但辐射效率降低。 相似文献
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为了研制出不需要立体眼镜,且兼容平面显示的自动立体显示屏,利用液晶制作出透光狭缝,放在面板和背光源之间,使之加上电压时只有狭缝透光,背光变成一排平行的线光源,照射液晶屏时每个光源对应4列子像素,左右眼只能看到不同像素,进而产生立体感。不加电压时背光变成面光源,和普通液晶显示屏一样显示平面图像。为了减少面板表面防眩偏振片的影响,用减反射涂层覆盖防眩偏振片。通过改变普通液晶屏的背光,以及对普通液晶屏表面进行处理,制作出了4个视点的立体显示屏,实现了立体显示和平面显示的切换。该技术方案可满足批量生产的要求。 相似文献
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Gottschalk J.R. Shvydky O. Compaan A.D. Theodosiou C.E. Williamson W. Jr. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1999,27(3):772-777
We have used a commercially available monochrome plasma display panel (PDP) to study the electrical and optical properties of PDPs. The monochrome PDP was filled with helium at a pressure of 0.5 atm with the visible light emission observed directly from the gas discharge. The PDP is driven by an AC voltage source, operating at ~130 V at 50 kHz. With nanosecond resolution we have measured the current in the panel and the spectrally resolved light emission from the panel as a function of applied voltage. This study of a helium-filled conventional PDP is designed to provide data needed for improved modeling calculations of the plasma discharge. The ultimate goal is to achieve improved designs and efficacies for large-screen color PDP's 相似文献
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Flat panel displays are often exposed to the electrostatic damage during various panel manufacturing processes. In this paper, we report the electrostatic discharge failure in a unique process condition of OLED display process during which the substrate of OLED display is turned over while in the vacuum chucking condition. In order to solve this failure, we adopted newly developed technology of VUV (Vacuum Ultraviolet) radiation to neutralize the electrostatic electricity. This technology generates ions and electrons by ionizing residual molecules in vacuum chamber such that it enables the charged substrates to be neutralized in the chamber. While this new neutralization method is certainly effective in high vacuum process, the lifetime and performance of the VUV ionizer are not validated. To understand the lifetime and performance of VUV ionizer, we conducted the experiments in the vacuum chamber of an 8th generation display facility with various operating time of UV lamp. We analyzed the characteristic of VUV lamp and suggested the neutralization mechanism of VUV ionizer in a low pressure. Based on the experiments, this new neutralization method performs well under the high vacuum environment and is able to completely reduce the electrostatic potential down to 0 V within a short time. 相似文献
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Ouyang J. Callegari T. Caillier B. Boeuf J.P. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》2003,31(3):422-428
We present experimental and simulation studies of the plasma in a macroscopic AC plasma display panel discharge cell operating with a large coplanar gap. We find that the xenon excitation efficiency is much larger than that in the conventional, small-gap electrode configuration but with larger sustaining voltage. We discuss the discharge mode and efficiency in such large gap configurations, with the help of time resolved optical diagnostics and simulations. 相似文献
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本文用数值方法和场致发射的福勒—诺德海姆公式计算了薄膜场致发射阴极(TFFEC)的伏安特性和其应用于平板显示系统的空间扩展特性以及格雷型场效应管的时间响应特性 通过计算得到了TFFEC在不同失端和表面形状情况下的伏安特性曲线,并分析了阴极结构的一致对其发射的均匀性和稳定性的影响。应用TFFEC的新型平板显示系统,其空间分辨能力与阳栅距、栅极电压有很大关系。格雷型场效应管具有皮秒级的响应时间。 相似文献
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Macroscopic cell experiments and three-dimensionalmodelling on electrode-shaping plasma display cell
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A macroscopic cell and three-dimensional fluid model have been used
to investigate the discharge characteristics in ac plasma display
panel cells of electrode-shaping configurations. Four kinds of
non-standard geometries (i.e. $D$-, ${\it\del}$-, $W$- and $U$-shape
electrodes) have been considered. The characteristics of the
discharge current, the operating voltage and the discharge
efficiency of different configurations have been discussed. It is
found that the discharge efficiency can be improved by about
10\%--30\% compared with the standard geometry, while the operating
voltage increases slightly in the non-standard geometries. There is
a trade-off between improving the discharge efficiency and lowering
the sustaining voltage in design of plasma display cells by
electrode shaping. 相似文献
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有机发光二极管(Organic Light Emitting Diode,OLED)由于高对比度、高亮度、超薄、低功耗、宽视野、快响应速度等特性,日益引起人们的兴趣。通过对部分周边驱动电路集成于衬底的2英寸(5.08cm,64×3×80)有源矩阵显示屏(Active Matrix OLED,AMOLED)上像素驱动电路的仿真,确定彩色OLED显示屏维持白平衡时R、G、B三种OLED所需的驱动电压、电流等工作参数。OLED的发光亮度和电压并不是线性关系,为了维持显示屏的色彩均衡性,对图像数据编码进行校正,保证了灰阶电压与发光亮度呈线性变化。从BMP格式的文件中提取出图像数据部分,进行数据变换,生成符合INTELHEX文件格式并且满足D/A输出要求的数据文件,刻录到E2PROM中,完成外围驱动电路所需要的图像数据准备。AMOLED显示屏采用逐行扫描的显示方式,因此外围驱动电路的目的是要在行、列扫描有效的同时,为每个像素送入相应的灰阶数据。现在,OLED专用驱动芯片比较少见,而液晶驱动芯片具有集成度高,电压输出范围大等优点,尤其是其内部集成了数据移位寄存器、数据锁存器、D/A转换器等电路,所以设计了基于FPGA和TFT-LCD液晶驱动芯片的外围驱动电路,实现了AMOLED显示屏的彩色图像显示。 相似文献
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Campbell R.B. Veerasingam R. McGrath R.T. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1995,23(4):698-708
A time dependent, two-dimensional model for simulating the plasma evolution in an AC plasma display panel (AC-PDP) is described. Reaction-convection (mobility)-diffusion equations for charged particles and excited heavy neutral species are solved along with Poisson's equation, a radiation transport equation, a surface charge buildup equation, and an external L-R-C circuit equation using a fully implicit numerical method. Electron-driven rate coefficients are computed with a 0-D Boltzmann solver in the local field approximation. For studying the particle dynamics in pure helium, we consider a reduced model in which radiation transport is ignored and the excited species manifold is collapsed to composite metastable and excited states. The model predictions of breakdown voltage are quite sensitive to the value of the secondary electron emission coefficient assumed and the uncertainties in the electron-driven reaction rates. An initial comparison between the model predictions and I-V measurements from a specially constructed helium-filled panel is made with qualitatively similar behavior. The lack of quantitative agreement can be explained by a combination of uncertainties in the model input data and uncertainty in the initial surface charge state in the experiments 相似文献
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Kyung Cheol Choi Byung-Jun Rhee Ho-Nyeon Lee 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》2003,31(3):329-332
The temporal effects of charged and metastable particles in the micro-discharges of an AC plasma display panel (AC-PDP) were investigated under actual driving conditions. The discharge gas used in the 4-in PDP was Neon + 4% Xenon. The discharge characteristics in terms of the time scale related to the space-charge decay, wall charge decay, metastable decay, and charge accumulation were investigated using a pulse technique. For Neon + 4% Xenon gas-mixture discharges of 500 torr, 4 /spl mu/s was related to the time scale of the space-charge decay and wall-charge accumulation time. The minimum sustain voltage started to dramatically increase at 20 /spl mu/s, which was related to the time scale of the metastable particles. Whereas, after 40 /spl mu/s, the minimum sustain voltage slowly increased with a slope of 0.01581, which was related to the inverse of the time scale of the wall charge decay. 相似文献
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为了避免光照对铟镓锌氧薄膜晶体管(InGaZnO thin film transistors,IGZO TFTs)电学特性的影响,IGZO TFT要增加遮光金属层.本文研究了遮光金属栅极悬浮时,IGZO TFT的输出特性.采用器件数值计算工具TCAD(technology computer-aided design)分析了IGZO层与栅介质层界面处电势分布,证实了悬浮栅(floating gate,FG)IGZO TFT输出曲线的不饱和现象是由悬浮栅与TFT漏端的电容耦合造成.基于等效电容的电压分配方法,提出了悬浮栅IGZO TFT电流的一阶模型.TCAD数值分析及一阶物理模型结果与测试具有较高程度的符合,较完整地解释了悬浮栅IGZO TFT的电学特性. 相似文献
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平板显示因具有体积小、重量轻、功耗低、画质好等优点,已被广泛应用于电子仪表显示、车载显示、数码相机、智能手机、个人电脑、电视产品等领域之中。本文介绍了薄膜晶体管液晶显示(Thin Film Transistor-Liquid Crystal Display,TFTLCD)、有机发光二极管Organic Light Emitting Diode(OLED)显示、量子点发光二极管Quantum Dot Light Emitting Diode(QLED)显示及微发光二极管(Micro-LED)显示这几种平板显示技术的结构及原理。从结构、材料、性能、应用几方面对这几种平板显示技术进行了比较。最后给出了这几种平板显示技术的最新研究进展。LCD显示经过多年发展,技术成熟,成本低廉,仍然在显示市场占据主流地位。OLED显示技术摆脱了传统LCD的背光源,开创了自发光显示的未来发展方向。在相当一段时期内,LCD和OLED仍将会共存于市场中,相互竞争和补充。QLED显示和Micro-LED显示这两种显示技术,在理论上较OLED显示具有更好的颜色表现、更长的工作寿命等优势,具有非常广阔的发展前景,将为未来显示行业提供更多更好的选择。 相似文献