NEM电子显示文件应用的发展趋势分析

Late-News Paper: Development of 5.1-inch High Speed SVGA BistableBiNem  Display for Electronic Document Applications

最近新闻论文：高速5.1寸SVGA双稳状态下NEM电子显示文件应用的发展

Abstract摘要

A high speed 200 dpi passive matrix bistable SGVA display panelhave been developed using BiNem display technology. 

高速为200 dpi的被动矩阵双稳态SVGA显示器面板已被开发利用在数码相机显示器技术之中。Imagesare addressed and displayed in 240 ms at ambient temperature.High fabrication yield and simple manufacturing process havebeen achieved by using newly developed, second generationBiNem alignment material. The reflectance is 32 % and thecontrast ratio 6.5 : 1. The manufacturing uses 14 x 16 inch glassplates processed on commercial LCD manufacturing equipment.该种主要的是使用生产的是采用14×16英寸的玻璃板，主要是用于加工商用液晶的制造设备的上面的。

1. Introduction介绍

The bistable BiNem liquid crystal displays are particularlyattractive for ultra-low power mobile products and paper-likedisplay applications, such as e-dictionaries, e-books, e-documentsor e-newspapers. 双稳态BiNem液晶显示器是一种超低功耗dev移动产品，这种产品主要是在纸张的显示应用上，如电子辞典，电子书籍，电子报纸等。Like paper, BiNem displays require no powerto maintain an image once it has been written. They can displayhigh resolution color or grayscale images. The BiNem technology offers one of the lowest potential manufacturing costsamong the various bistable display technologies [3-7]. This isbecause it utilizes existing, mature LCD manufacturing lines andsupply chains, and provides high addressability with passivematrix driving, meaning that high resolution displays can bemanufactured without active matrix backplanes.  http://www.ukassignment.org/uklunwen/

In this paper, we report several improvements that underline thecompetitive advantages of BiNem technology and represent astep toward mass production and market acceptance. Theaddressing time of B/W panels has been reduced to 0.4 ms perline at ambient temperature. The manufacturing yield has beenconsiderably improved with the introduction of second generationBiNem alignment layer materials. High speed 200 dpi reflectivepassive matrix SVGA (600 x 800 pixels) BiNem display panelshave been manufactured and the BiNem manufacturing processhas already been implemented in a LCD production lineprocessing 14 x 16 inch glass plates.

2 Structure of BiNem displaysBiNem显示器的结构

The two stable textures in BiNem displays are U and T. 两个稳定的纹理数码相机的显示器是U和T。

U is 0°-twisted and T is 180°-twisted. U appears black and T white in theusual two-polarizer reflective configuration (figure 1).The switching between the U and T textures is performed in twosteps: 1) anchoring breaking phase, 2) texture selection phase. Tobreak the anchoring, the peak line voltage has to be larger than theanchoring breaking voltage threshold ≈ε Δε0Ud.W Kcz,where d is the cell gap,zW the zenithal (polar) BiNem anchoring layer energy, K an average LC elastic constant and0ε and Δε have their usual meaning.Figure 1: Structure of BiNem displaysBiNem displays only differ from usual STN LCDs by a thinnercell gap and the use of BiNem alignment material instead of theusual polyimide alignment material.3. Development of a 5.1” high speedBiNem SVGA displayA 5.1” SGVA B/W BiNem display with 200 dpi resolution hasbeen designed for integration into a BiNem Evaluation Kit (seefigure 2).GVA B/ W BiNem显示的是200dpi的分辨率，这是一个被检定的设计融入了一个BiNem的评估套件中（见图2）。

BiNem displays only differ from usual STN LCDs by a thinnercell gap and the use of BiNem alignment material instead of theusual polyimide alignment material.

3. Development of a 5.1” high speedBiNem SVGA display

A 5.1” SGVA B/W BiNem display with 200 dpi resolution hasbeen designed for integration into a BiNem Evaluation Kit (seefigure 2).

The BiNem Evaluation Kits are aimed at demonstrating theoverall performance of BiNem display modules in terms ofoptical quality, speed and ultra-low power consumption. Theyhave been manufactured on the Nemoptic line.

The excellent readability of the display is a consequence of itshigh 200 dpi resolution, good brightness and wide viewing angle,combined with the presentation of flicker-free images.Driving and control electronics optimized for simpledemonstration purposes has been included. Images can bedownloaded via a USB link, and are displayed in 240 ms atambient temperature.图片通过USB连接下载，在当前的情形下是可以达到240 ms 的速度的。