某机载军用加固液晶显示器的振动试验

针对某型机载军用加固液晶显示器在随机振动试验条件下出现的故障,进行了故障定位和失效机理分析。根据分析结果对故障采取了相应的纠正措施(用硅橡胶减振器代替失效的异戊橡胶减振器),通过试验验证,证明该措施显著提高了该显示器的振动环境适应性。     

废LCD面板有机材料水热资源化产乙酸

LCD面板主要由附着偏光片及液晶等有机材料的玻璃面板构成。有机材料的去除及资源化利用是废LCD面板处理的第一步。在水热条件下对废LCD面板进行了降解产酸研究。研究考察了反应温度、反应时间、氧化剂用量、水用量及pH值等对水热产乙酸产率及选择性的影响。通过正交实验确定了水热产乙酸的最佳操作条件：反应温度325℃,反应时间5min,氧化剂（30％H2O2）0．6mL,用水量2mL,近中性环境（pH6-6．5去离子水）。此条件下,乙酸产率及选择性分别为68．83％及70．56％。结果表明,以废LCD面板有机材料为原料,采用水热技术进行产乙酸反应,可实现其资源化再利用。     

废弃液晶屏玻璃基板的行星式球磨工艺研究

以废弃液晶屏玻璃基板为原料,研究了球磨方式和球磨时间在球磨过程中对粉料粒径分布的影响。通过对废弃液晶屏玻璃基板的行星式球磨工艺的研究,探讨了球磨方式、球磨时间等因素对球磨效果的影响,以建立玻璃粉体细化的合理球磨方式和工艺参数。     

液晶显示器液晶处理与铟回收技术

在实验室条件下,对液晶显示器回收的各个重要环节作了初步的探索,提出了一整套回收工艺.其中包括利用丙酮常温浸取去除偏光片、分离玻璃基板、溶解液晶,还包括利用硫酸溶液和二氧化锰联合浸取玻璃基板,铟的浸取率达89%.得到的铟的酸液经过萃取、置换和电解,可以得到铟的产品,为液晶显示器的资源化和无害化提供实验数据和技术支持.     

液晶显示器玻璃基板回收工艺

利用无机溶液对废液晶显示屏的玻璃基板回收工艺作了初步的探索,根据回收处理的难易,简单地将废弃液晶显示屏分为3类:含树脂黑色矩阵膜的上层玻璃基板可以采用氢氧化钠直接浸泡处理、含铬黑矩阵膜的上层玻璃基板和下层玻璃基板可以先用氢氧化钠溶液浸泡去除偏光片,再用氢氟酸溶液浸泡处理。结果表明,利用无机溶液处理可以较快得到干净的玻璃基板,而且工艺简单、成本低。     

Closed loop recycling of plastics containing Flame Retardants

Annually 2.7 million tonnes of plastics containing Flame Retardants (FRs) are globally discarded in Waste Electrical and Electronic Equipment (WEEE). Little is known on the feasibility of closing material loops for FR plastics. Therefore, series of experiments were set up to analyze the feasibility of separating plastics containing FRs from one specific product category, namely End-of-Life (EoL) Liquid Crystal Display (LCD) TVs. The characterization of the housings of this waste stream indicated a concentration of 18 wt% Bromine based (Br) FRs and 31 wt% Phosphor based (P) FRs, the remainder not containing FRs. With practical tests it was demonstrated that, after disassembly and plastic identification, the co-polymer poly-carbonate (PC)/acrylonitrile-butadiene-styrene (ABS) containing PFR can be recycled in a closed loop system. Based on the determined plastic density distributions and separation efficiencies of optical sorters, a purity of 82% was calculated for PFR PC/ABS separated from EoL LCD TVs after size-reduction (shredding). Performed miscibility tests indicated that for this fraction at least a factor 10 dilution with virgin material is required. In addition, higher waste volumes are required for a size-reduction based treatment to become economically viable and technical challenges still need to be faced, whereas closed loop recycling of PFR PC/ABS from the current waste stream of EoL LCD TVs of different brands in a disassembly based treatment is found to be technically feasible and economically viable under European boundary conditions.     

废弃液晶显示屏中液晶的回收与性能检测

为回收废弃LCD(液晶显示器)显示屏中的液晶,提出了“超声波辅助有机溶剂溶解液晶屏、膜过滤和减压蒸馏”的回收方法,并以TN-TFT显示模式的液晶屏为试验对象,对回收液晶的光电性能进行检测和相变分析,以评估其潜在的利用价值. 结果表明:方法的回收率达50%;收集物液晶特性明显,呈现出较宽的向列相温变区间和较高的清亮点温度,但纯度不高,达不到日常显示所用的液晶纯度要求(GCMS>99%);响应时间为33.2ms,可以满足日常LCD显示屏的要求;介电常数为4.71,折射率为0.089,虽与纯净液晶相比稍有下降,但可满足标准AM-LCD显示的参数要求;阈值电压为3.2V,比纯净液晶有所提高,可进一步去除离子性杂质进行提纯,以降低阈值电压.      

CAE软件跌落仿真在遥控器结构设计上的应用

本文介绍CAE(Computer Aided Engineering)仿真软件在提高遥控器液晶显示屏跌落保护中的应用,阐述CAE在产品设计上的重要性,使CAE仿真软件能得到广泛的应用。     

Luminance of the Surround and Visual Fatigue of VDT Operators

Luminance distribution in the visual field is considered as one of causal factors with a significant influence on visual fatigue, especially for intensive and extended Video Display Terminal (VDT) work. The aim of the study was to define visual fatigue of VDT operators for different values of surrounding luminance. Experiments were carried out in laboratory conditions under 3 lighting conditions. Only 1 lighting parameter—the luminance of the wall behind the display (surrounding luminance)—changed. Visual fatigue was measured both by a subjective evaluation of different visual complaints (asthenopic symptoms) and by objective measurements of changes in the following visual functions: accommodation, convergence, habitual horizontal phoria, critical fusional frequency (CFF), and visual acuity. The same experiments were done for CRT (Cathode Ray Tube) and LCD TFT (Liquid Crystal Display with Thin Film Transistor) screens. The results of the study have shown that there was no significant influence of the value of surrounding luminance on the asthenopic symptoms for either type of screen. A general tendency towards bigger visual complaints for LCD TFT than for CRT participants was found. An objective evaluation of visual fatigue demonstrated a tendency towards bigger changes in visual functions with an increase of surrounding luminance for both screens. Statistical analysis of the results has shown that surrounding luminance influences significantly the reduction of the accommodation amplitude (significance level < .05).     

军用地面装备加固液晶显示器环境适应性研究

通过对9家军用加固液晶显示器的环境适应性比对试验,归纳分析了各家产品对温度、振动、冲击、湿度、盐雾等环境的适应能力,提出改进措施建议,为产品设计人员和军方采办提供参考。