Paper Titles
A Silicon Capacitive Seismic Accelerometer with a Simple Fabrication Process
p.4088
The Application of Particle Swarm Optimization Algorithm in the Production Scheduling Modeling of ERP-Based
p.4092
Application of Direct Actuated Digital Servo Valve in Electrohydraulic Static Loading System
p.4098
Optical Path Analysis of the Optical Fiber Bundle Hydrogen Sensor
p.4102
A Novel Optical Sheet with Microstructures Design in the LED Direct-Lit Backlight Module
p.4106
Research on the Light-Sensitive Character and the Morphologies of WO3 Synthesized Using the Hydrothermal Method
p.4110
The Test Method Research of Electric Light Sources Parameters and Detection of Uncertainty Evaluation
p.4114
Analysis and Design of IGBT Driving and Protection Circuit for Photovoltaic Grid-Connected Inverter
p.4118
Two-Colour Mid-Infrared Optical Absorption under Electric Field in an InAs/GaSb-Based Type II and Broken-Gap Quantum Well
p.4122

A Novel Optical Sheet with Microstructures Design in the LED Direct-Lit Backlight Module

Article Preview

Abstract:

A novel optical sheet with double-layer microstructures is proposed to improve the brightness uniformity and optical efficiency in the LED direct-lit backlight module. By means of 2D ray-tracing program design and commercial optical software simulation, we enhance the brightness uniformity from 45.3% with traditional planar diffuser to 82.7% with new optical sheet, and the average brightness is promoted about 10.9% in the same frame of backlight module which internal thickness is only 13mm. Thus, this novel optical sheet with microstructures design is useful for a slim LED direct-lit backlight module.

You might also be interested in these eBooks
Mechanical and Electronics Engineering III View Preview

Info:

Periodical:

Applied Mechanics and Materials (Volumes 130-134)

Pages:

4106-4109

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.130-134.4106

Citation:

Cite this paper

Online since:

October 2011

Authors:

Chi Feng Chen, Li Ming Lu, Yung Fang Jhou

Keywords:

Diffuser Sheet, LED Direct-Lit Backlight Module, Optical Microstructures

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2012 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] G.H. Kim, W.J. Kim, S.M. Kim, J.G. Son: Analysis of Thermo-Physicaland Optical Properties of a Diffuser using PET/PC/PBT Copolymer in LCD Backlight Units, Elsevier SDOS ejournal, Displays, South Korea (2004).

DOI: 10.1016/j.displa.2004.11.001

Google Scholar

[2] H. -C. Guo, et al.: Novel Diffuser for LCD Backlight Application, SID 05 Digest, pp.575-577, Taiwan. (2005).

Google Scholar

[3] Y. Kim et al.: Design of High Uniformity LED Backlight, SID 05 Digest, pp.1321-1323. (2005).

DOI: 10.1889/1.2036248

Google Scholar

[4] H.P. Kuo, M.Y. Chuang, C.C. Lin: Design correlations for the optical performance of the particle-diffusing bottom diffusers in the LCD backlight unit, Powder Technol. 192 (2009) 116–121.

DOI: 10.1016/j.powtec.2008.12.003

Google Scholar

[5] C.J. Ting, F.Y. Chang, C.F. Chen and C. P. Chou: Fabrication of an antireflective polymer optical film with subwavelength structures using roll-to-roll micro-replication process, Journal of Micromechanics and Microengineering, Vol. 18, (2008).

DOI: 10.1088/0960-1317/18/7/075001

Google Scholar

[6] S.I. Chang, J.B. Yoon, H. Kim, J.J. Kim, B.K. Lee, D.H. Shin: Microlens array dif- fuser for a light-emitting diode backlight system, Opt. Lett. 31 (20) (2006) 3016–3018.

DOI: 10.1364/ol.31.003016

Google Scholar

[7] C.F. Lin, Y.B. Fang, P.H. Yang: Optical film with microstructures array for slim-type backlight applications, Optik (2010).

DOI: 10.1016/j.ijleo.2010.07.023

Google Scholar