Electromagnetic Compatibility of LCD Module in TEA CO2 Laser

MENG Fang-jiang; SHAO Chun-lei

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Electromagnetic Compatibility of LCD Module in TEA CO₂ Laser

Device Technology & Physics | 更新时间：2020-08-12

- Electromagnetic Compatibility of LCD Module in TEA CO₂ Laser
- Chinese Journal of Liquid Crystals and Displays Vol. 25, Issue 6, Pages: 798-802(2010)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所激光与物质相互作用国家重点实验室, 吉林长春 130033
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN27
- Received：21 July 2010，
  
  Revised：10 August 2010，
  
  Published Online：20 December 2010，
  
  Published：20 December 2010
- 稿件说明：
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孟范江, 邵春雷. TEACO2激光器系统中液晶显示模块的电磁兼容性研究[J]. 液晶与显示, 2010,25(6): 798-802

MENG Fang-jiang, SHAO Chun-lei. Electromagnetic Compatibility of LCD Module in TEA CO2 Laser[J]. , 2010,25(6): 798-802
孟范江, 邵春雷. TEACO2激光器系统中液晶显示模块的电磁兼容性研究[J]. 液晶与显示, 2010,25(6): 798-802 DOI：

MENG Fang-jiang, SHAO Chun-lei. Electromagnetic Compatibility of LCD Module in TEA CO2 Laser[J]. , 2010,25(6): 798-802 DOI：

摘要

TEA CO

激光器工作时会产生强烈的电磁干扰

这种干扰会使其控制系统中的液晶显示屏发生显示数据混乱、甚至无显示等现象。文章对TEA CO

激光器系统的电磁干扰和液晶显示模块进行了测试及分析。通过对液晶显示模块进行电磁屏蔽、对液晶显示模块的显示区域进行双层屏蔽、供电电源隔离滤波、数据线电缆适当缩短等措施

有效地抑制了激光器对液晶显示模块的电磁干扰。实验结果表明:所设计的屏蔽措施在全部电磁干扰频带内效能满足需求

其中在34 MHz处磁场屏蔽效能为56.2 dB

供电电源已无干扰出现

液晶显示模块能稳定显示数据。结果说明:采取传导和辐射干扰的电磁兼容性加固措施

能够使液晶显示模块在强烈电磁干扰环境中稳定可靠地工作。

Abstract

TEA CO

laser can generate great electromagnetic interference (EMI) during its operation which makes LCD data disorder and even no display. The measurements and analysis are conducted for EMI and LCD module in this paper. Through electromagnetic screen for LCD module and display area

insulating and filtering for supply source

suitable shorten for data cable

EMC of laser to LCD module is effectively suppressed. The experimental results show that the capability of the designed screen in all EMI frequency bands can satisfy the requirement which the effectiveness of shielding is 56.2 dB in 34 MHz. There is not EMI for supply source and LCD module can show data stably. The results show that using EMC reinforcements for conducted and radiated interference can make LCD module work stably and reliably in the environment of intense EMI.

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references

Bhatia M S,Kumar G. On the EMI potential of various laser types //IEEE Proceedings of the International Conference on Electromagnetic Interference and Compatibility,Bangalore,India:IEEE,2002:3-5.[2] 孟范江,郭立红,杨贵龙,等.大功率 TEA CO2激光器系统中电磁干扰的抑制 [J]. 强激光与粒子束, 2008, 20(2):177-182.[3] 李殿军,杨贵龙. TEA CO2激光器主放电延迟时间对效率的影响 [J]. 光学精密工程, 2006,14 (5):807-810.[4] 杨雷,刘晓旻,魏春雪.液晶显示器的接口技术及其抗干扰措施 [J]. 液晶与显示, 2003,18(2):121-123.[5] 黄树毅,程汉湘,荆怀成,等.TMS320F2812与液晶显示模块的接口电路及程序设计 [J]. 液晶与显示, 2009,24(5):688-701.[6] 王幸之,王雷,翟成,等. 单片机应用系统抗干扰技术 [M].北京:北京航空航天大学出版社,2000:91-98.[7] 钱振宇.产品的电磁兼容性设计 [J]. 电源技术应用, 2001,(3):51-52.

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