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本文详细地分析了对数字显示的诸影响因素,综合考虑这些因素,并给出在数字显示时,CRT所应具有的分辨率的计算方法。符合国际标准,因而应用广泛。 相似文献
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从颜色的三重属性出发,设计生成了测定颜色亮度、色调和色饱和度的三维色域测试图,用这些测试图,对被测显示器进行了色度测试,得到了不同亮度下的三维色域图。用切片算法计算了被测显示器的三维色域,并与笔者之前基于相加混色原理计算的理论三维色域值进行了比较,结果表明二者基本相等。 相似文献
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《Electron Devices, IEEE Transactions on》1975,22(9):784-788
A new method of projection-type composite holography for displaying three-dimensional (3-D) color information has been developed. The basic concept and the results of the experiments are described. A model 3-D color display system for storing several kinds of colored cinematic information is presented as a practical application of the method. This method constructs the 3-D color image by synthesizing the reconstructed images which are projected on the unilaterally direction-selective screen from several holograms. The 3-D color information is recorded as 3N holograms on a roll film arranged in an arc, the center of which is located on the screen. To reconstruct the 3-D color information three kinds of laser beams (red, green, and blue) illuminate these 3N holograms under the same condition. All the reconstructed images from these 3N holograms are projected and synthesized on the unilaterally direction-selective screen. The direction-selective axis of the screen is set parallel to the direction of the film. Consequently the color components of the reconstructed images are diffusely reflected and the angular components are reflected back in the original direction. The human eye can recognize a 3-D color image in the viewing zone enlarged through the vertical diffusing effect of the screen. 相似文献
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《Electron Devices, IEEE Transactions on》1974,21(5):312-313
A liquid-crystal display device is reported combining a polarizer, a deformation of aligned phases (DAP) cell, a twisted nematic (TN) cell, and an analyzer in series arrangement. The color of the transmitted light can be modulated by the application of voltage to the DAP cell. The transmission properties of the device can be switched from the DAP mode for crossed polarizers to that for parallel polarizers by the application of voltage to the TN cell. This improves control of the transmitted color. 相似文献
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针对普通显示液晶系统在色彩表现方面的不足,在现有色域扩展技术的基础上,设计了一种以白和宝石蓝两种颜色发光二极管作为背光源的宽色域液晶显示系统。本文通过分析普通显示系统的色域,以色域覆盖率最大化为准则,选择主波长为501nm的宝石蓝发光二极管作为扩展背光源,扩展普通显示系统未能显示的青绿色区域。从理论上分析该系统的色域范围,并且详细介绍了系统背光源阵列、数据转发等功能模块的电路实现。实验结果表明:本文所设计的宽色域液晶显示系统的色域扩展了青绿色区域且色域覆盖率可达到45.65%。相比与其他多原色显示系统,本文设计的宽色域液晶显示系统不仅简化了硬件设计的复杂度,而且能够重现更多青绿色区域的颜色。 相似文献
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由于近几年计算机升级换代周期不断缩短,迫使功能稍差的彩显纷纷被淘汰,再加上二手彩显市场,这类彩显社会拥有量是很大的。实际上这类被淘汰闲置的彩显并没有使用多长时间,其显像管及电路性能还都完好。能不能将这类闲置彩显改做它用呢?实践证明,完全可以将这类彩显改为高品质多制式视频监视器。l彩显改彩监的优越条件彩显与彩电原理基本相同,只是彩显没有高频信号处理通道。尽管彩显与彩电有许多相似之处,但彩显制造工艺、有关电气参数及可靠性等方面要求比彩电都要高得多。因此,具备了将其改为高品质视频彩监所必须的条件:(l)… 相似文献
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为了实现LED显示系统的散热的需求,在分析多种常用散热技术的基础上,提出并研究了半导体制冷技术在LED显示屏散热中的应用。半导体制冷的理论基础是赛贝尔效应和帕尔贴效应,研究表明该技术在理论上完全可行,有一定的应用潜力。 相似文献