Embed a linear irregular Fresnel lens into a simple empty chamber to let a medium or large LED-sourced edge lighting backlight module be thin, lightweight, low-cost, and possess high effect of guiding light rays

Wen-Gong Chen

doi:10.1117/12.999381

27 November 2012 Embed a linear irregular Fresnel lens into a simple empty chamber to let a medium or large LED-sourced edge lighting backlight module be thin, lightweight, low-cost, and possess high effect of guiding light rays

Wen-Gong Chen

Author Affiliations +

Proceedings Volume 8560, LED and Display Technologies II; 85600A (2012) https://doi.org/10.1117/12.999381
Event: Photonics Asia, 2012, Beijing, China

Abstract

We propose a new and effective Light Guide Plate, called Empty Chamber Fresnel Lens Light Guide Plate (ECFL-LGP), to provide the merits of thin, lightweight, low-cost and high effect of light rays guiding for a medium or large LED-sourced Edge Lighting Backlight Module. It consists of a simple Empty Chamber and two sets of linear irregular Fresnel lenses. Due to the reasons that the structure of the Empty Chamber is simple and a Fresnel lens is thin and cheap, our ECFL-LGP will possess lower cost than the traditional hard LGP. On the other side, the irregular Fresnel lens in ECFL-LGP will be better than the traditional mesh-like dot about the effect of light rays guiding because its irregular linear groove angles can be evolved in terms of the optimization requirements of light rays guiding. As for the uniform problem of light rays guided to the LCD panel, we will design a double-deck linear irregular Fresnel lenses to act as a prismatic film according to the uniformity requirement. To overcome some problem caused by designing linear irregular Fresnel lenses, we propose an idea of dividing the designed Backlight Module into several sections to reduce the number of evolved groove angles, and dividing the design procedure into two stages: first, evolve two sets of linear irregular Fresnel lenses in the designed ECFL-LGP, then evolve four sets of linear irregular Fresnel lenses between the ECFL-LGP and the LCD panel. As a result, the thickness of the designed LED-sourced Edge Lighting Backlight Module will be 4.85 mm only (the LCD panel is not included).

Citation Download Citation

Wen-Gong Chen "Embed a linear irregular Fresnel lens into a simple empty chamber to let a medium or large LED-sourced edge lighting backlight module be thin, lightweight, low-cost, and possess high effect of guiding light rays", Proc. SPIE 8560, LED and Display Technologies II, 85600A (27 November 2012); https://doi.org/10.1117/12.999381

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
13 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Fresnel lenses

LCDs

Light emitting diodes

Waveguides

Light sources and illumination

Genetics

Light sources

Show All Keywords

Keywords/Phrases

Search In:

Publication Years