共查询到19条相似文献,搜索用时 140 毫秒
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提出了一种4级灰度的STNLCD驱动控制芯片的总体设计方案,重点讨论了关键模块——接口电路、SRAM模块、显示控制电路以及电源电路的设计。在实现多种显示功能的前提下,采用省电模式、门控时钟和重定时方法进行了低功耗优化设计。基于SMIC0.35umCMOS高压模型对驱动控制芯片的功能进行了仿真验证。 相似文献
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设计一种应用于STNLCD驱动芯片中的可支持多种类型MPU的接口电路,该电路在整个芯片中用于为内部电路提供数据,为电路的正常工作提供所需时序,并在同类设计中率先支持I^2C总线协议。简单介绍了MPU接口电路的设计要求,重点描述了MPU接口电路中各个模块的设计。采用Verilog对所设计的接口电路功能进行了仿真验证,并且整个芯片用SMIC0.25μm工艺得到了实现。 相似文献
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文章介绍了一种STN-LCD驱动控制芯片的设计方案.整个设计采用"自顶向下"的设计方法将芯片进行层次化功能划分,同时,参考已有的同类驱动控制芯片的设计经验,原理图输入设计和Verilog编程以及综合技术对模块进行设计.重点讨论分析了其关键部分一接口时序、控制电路和驱动电路的设计.对所设计的驱动控制芯片的数字部分功能和模拟部分功能分别采用modelsim仿真和cadence spectre仿真验证,符合所设计的芯片要求.该芯片可以甩在手机、数码相机、MP3、MP4等产品的显示屏驱动. 相似文献
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基于FPGA的DMD驱动控制电路的研究设计 总被引:1,自引:0,他引:1
根据数字微镜装置DMD的显示特性,以FPGA芯片为核心,设计了一种DMD驱动控制方案;从微镜的工作过程和二进制脉冲宽度调制理论入手,阐述了在有限利用TI公司相关芯片的情况下自主开发设计驱动控制电路的原理和整体方案,详细分析了包括图像解码模块和主驱动控制模块在内的主要电路的作用和设计方案,给出了系统组成框图、硬件设计部分的模块封装图以及仿真结果;本驱动控制电路成功实现了对DMD成像系统的驱动控制。 相似文献
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主要介绍了新型的平面显示技术--场助热电子发射显示的一种基于CPLD的静态多灰度驱动系统,以及两种芯片:双极性串并转换器HV6008和多灰度串并转换器HV633的工作原理和在该系统中的应用. 相似文献
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讨论使用ETK6201显示驱动芯片在空调显示板上的应用.首先分析ETK6201芯片的特性,然后给出该芯片在驱动空调显示模块中的硬件设计及软件设计流程图.使用该方案能够明显地减少空调显示部分的生产及开发成本,给空调厂商带来较大的成本优势.其控制电路简单,占用主控制芯片的资源少.该方案已在部分空调器厂家生产运行良好. 相似文献
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一种提高STN型单色点阵液晶显示器灰度级数的算法 总被引:1,自引:0,他引:1
根据图像的分解、传送、合成的原理以及STN型单色点阵液晶显示器件的灰度显示机理,提出了一种既能减小芯片面积、降低功耗又能提高灰度级数的多公式算法;利用VerilogHDL语言工具完成了灰度控制模块的设计;利用SYNOPSYS公司的EDA工具对该灰度控制模块进行了仿真、综合,并在FPGA上进行了验证。 相似文献
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Y. Iwamoto 《Journal of the Society for Information Display》2000,8(4):295-298
A new LCD for high‐duty passive‐matrix driving, referred to as a vertically aligned (VA) STN‐LCD, characterized by high transmittance and a high contrast ratio, has been developed. This LCD can display black‐and‐white images by using crossed polarizers without the use of a color compensator because the LCD has almost zero retardation at the initial alignment state. A fabricated black‐and‐white VA‐STN‐LCD without a black matrix shows high transmittance (>15%) and contrast (CR > 100) under 1/240‐duty direct‐multiplex driving. 相似文献
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J. Cliff Jones 《Journal of the Society for Information Display》2008,16(1):143-154
Abstract— The first commercial use of the Zenithal Bistable Display (ZBD?) is for electronic point‐of‐purchase (epop?) signage in the retail sector. As a reflective bistable display, this novel LCD technology only consumes power if new information is required and the image is updated. This allows complex images to be shown constantly for several years from the energy of a single low‐cost battery, when the display is updated up to ten times each day — ideal for signage applications. Excellent performance characteristics are achieved in a TN‐like STN‐LCD in which one of the alignment surfaces is a relief grating. Correct design of the grating shape and surface properties not only imparts the bistability, but allows control of the optical performance, the latching voltages, and the temperature range. Being addressed using a simple passive‐matrix approach, without the need for a thin‐film‐transistor backplane, large amounts of information may be displayed by STN drivers. Alow‐cost fabrication method has been devised that is compatible with conventional TN and STN manufacture, and with negligible equipment outlay. The device operating principles, manufacturing method, and performance of ZBDs are reviewed. 相似文献
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将液晶屏的对比度调节决定其是否能够有效显示的这个关键因素,化为以显示效果为目标函数的参数寻优问题。因此用遗传算法求取液晶屏对比度较优值,减少寻优时间,提高收敛性。进行了可以输入选择值的触摸屏和冠示对比度效果值的液晶屏的硬件系统设置。在遗传算法设计中重点说明了目标函数、适配值和复制概率的特点。完成了单片机C51编程和实现,实际运行确认了方法的正确性和实用性。 相似文献
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Aldo Badano 《Journal of the Society for Information Display》2009,17(11):891-896
Abstract— In this work, the effect of display temporal characteristics on detectability of signals was studied by comparing detection performance with a slow liquid‐crystal‐display (LCD) monitor and a fast, cathode‐ray‐tube (CRT) monitor when browsing multi‐slice image datasets in stack‐mode presentation. Thirteen readers evaluated 200 image sequence pairs in a two‐alternative forced choice experiment. The image sets consisted of three‐dimensional cluster lumpy backgrounds and were presented to the readers in two display devices: a three‐million‐pixel medical color LCD and a color desktop CRT. For the LCD, many inter‐gray‐level transitions are on the order of 50–60 msec, which was almost twice the frame time. The CRT had 2–5‐msec inter‐gray‐level transitions. The reader study was performed with a graphical‐user interface programmed using direct calls to OpenGL libraries to precisely control the browsing speed. The results were analyzed in terms of the difference in reader performance for each reader and each display, between a browsing speed of 20 and 50 frames per sec (fps). Average reader performance difference between 20 and 50 fps was measured to be 0.049 and 0.156 for the CRT and LCD monitors, respectively. The corresponding drop in reader performance associated with slow display was 0.11. 相似文献
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H. Tokioka M. Agari M. Inoue T. Yamamoto H. Murai H. Nagata 《Journal of the Society for Information Display》2002,10(2):123-126
A low‐power‐consumption thin‐film‐transistor liquid‐crystal display (TFT‐LCD) with dynamic memory cells embedded in each pixel using low‐temperature poly‐Si technology has been developed. By holding data in the memory, the operating rate of the data driver can be dramatically reduced to 4 Hz. Eight levels of gray scale with low power consumption can be achieved by using the area‐ratio gray‐scale method. This TFT‐LCD can be used for displaying fine still images, with low power consumption. 相似文献
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Yosuke Iwata Mitsuhiro Murata Kohei Tanaka Tadashi Ohtake Hidefumi Yoshida Koichi Miyachi 《Journal of the Society for Information Display》2014,22(1):35-42
We have developed a novel super fast response (SFR) thin‐film transistor liquid crystal display (TFT‐LCD) with an extremely wide temperature range. Nematic liquid crystal molecules with positive dielectric anisotropy are vertically aligned initially. Any gray‐to‐gray response is forcibly controlled by applying an electric field. Response times of the SFR TFT‐LCD are over several times shorter than those of conventional LCDs such as vertical alignment or in‐plane switching LCDs. 相似文献