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Research on the Methods of Improving Uniformity and Brightness of the Backlight System

Author: ZhuangXiaoZuo
Tutor: XieHongBo
School: Tianjin University
Course: Optical Engineering
Keywords: LCD backlight group Brightness Uniformity LGP Heavy use of polarized light LightTools
CLC: TN873.93
Type: Master's thesis
Year: 2007
Downloads: 368
Quote: 4
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Abstract


With CRT, plasma, rear projection and other display devices , LCD monitors as a result of having a pure flat , showing fine , thin , colorful flat panel display and other features to become the mainstream . To ensure its increasingly broad application prospects , it is necessary to further improve the display effect , especially brightness and uniformity. But the LCD itself does not light , so backlight research and design has become modern display and imaging technology research hotspot , with extensive theoretical and practical value. Stage light guide and brightening the LCD industry is facing a major problem . This paper analyzes the communication process in the light , the backlight light loss group the main way , discusses several ways to improve energy efficiency : high reflectivity film polarization separating heavy use , adding a prism film , improved guide light panels. LCD industry combined with our current production situation , this paper proposes a polarized light separation Department to conduct re -use methods and designs specific experimental optical path , calculate the solar energy utilization , a detailed error analysis . This scheme for large- screen display device , to improve the energy efficiency and reduce the losses from the side , while the prism sheet can be used to reduce the number and power consumption. Simple structure, easy to implement. In this paper, LightTools professional design capabilities , backlight system to achieve a three-dimensional modeling ; using Monte Carlo ray tracing capabilities , to complete the entire optical path simulation analysis, corresponding to the brightness and uniformity of a variety of output , to facilitate later debugging and optimization. Based on previous work in this paper improve and perfect the existing optical path tracing simulation program, using . TXT files as interface data achieved with interactive modeling tools for use ; initially explored the integration of membrane function contains a prism light guide designed to enable small screen display device slimmer and better performance .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Terminal equipment > Display device,the display > LCD monitors
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