Design of integrated light guide plate with functional structure of enhanced diffusion length for ultra-slim LED backlight unit

Hye Ran Moon, Min Ho Shin, Jae Yong Lee, Kyu Jin Jang, Young Ok Chung, Young Joo Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

An integrated light guide plate (LGP) with a functional structure for a longer diffusion length to decrease the thickness was proposed and designed for the large area direct-type LED backlight unit (BLU). The integrated LGP is composed of a concave cone structure on the top surface and a rugged bottom surface. The light emitted from the LED sources can be reflected on the top surface and diffuse effectively inside the LGP and in the bottom air-gap, which is placed below the LGP to realize sufficient diffusion length even in the ultra-slim structure. After comparing the optical simulation results with the measured data from the fabricated hexagonal unit cell of an LGP, we verified our design concept and realized the integrated LGP. The final LGP for a 55-inch LED display shows a brightness uniformity of 90.5% with a reduced number of 81 LEDs and a thickness of 6 mm, a remarkably reduced value compared with previous direct-type large area LED backlight units.

Original languageEnglish
Article number6913493
Pages (from-to)44-52
Number of pages9
JournalIEEE/OSA Journal of Display Technology
Volume11
Issue number1
DOIs
Publication statusPublished - 2015 Jan 1

Fingerprint

diffusion length
Light emitting diodes
light emitting diodes
Light sources
Cones
Luminance
cones
brightness
Display devices
air
Air
cells

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Moon, Hye Ran ; Shin, Min Ho ; Lee, Jae Yong ; Jang, Kyu Jin ; Chung, Young Ok ; Kim, Young Joo. / Design of integrated light guide plate with functional structure of enhanced diffusion length for ultra-slim LED backlight unit. In: IEEE/OSA Journal of Display Technology. 2015 ; Vol. 11, No. 1. pp. 44-52.
@article{d1c2f98b56e14e539d7191328787f975,
title = "Design of integrated light guide plate with functional structure of enhanced diffusion length for ultra-slim LED backlight unit",
abstract = "An integrated light guide plate (LGP) with a functional structure for a longer diffusion length to decrease the thickness was proposed and designed for the large area direct-type LED backlight unit (BLU). The integrated LGP is composed of a concave cone structure on the top surface and a rugged bottom surface. The light emitted from the LED sources can be reflected on the top surface and diffuse effectively inside the LGP and in the bottom air-gap, which is placed below the LGP to realize sufficient diffusion length even in the ultra-slim structure. After comparing the optical simulation results with the measured data from the fabricated hexagonal unit cell of an LGP, we verified our design concept and realized the integrated LGP. The final LGP for a 55-inch LED display shows a brightness uniformity of 90.5{\%} with a reduced number of 81 LEDs and a thickness of 6 mm, a remarkably reduced value compared with previous direct-type large area LED backlight units.",
author = "Moon, {Hye Ran} and Shin, {Min Ho} and Lee, {Jae Yong} and Jang, {Kyu Jin} and Chung, {Young Ok} and Kim, {Young Joo}",
year = "2015",
month = "1",
day = "1",
doi = "10.1109/JDT.2014.2359932",
language = "English",
volume = "11",
pages = "44--52",
journal = "IEEE/OSA Journal of Display Technology",
issn = "1551-319X",
publisher = "IEEE Computer Society",
number = "1",

}

Design of integrated light guide plate with functional structure of enhanced diffusion length for ultra-slim LED backlight unit. / Moon, Hye Ran; Shin, Min Ho; Lee, Jae Yong; Jang, Kyu Jin; Chung, Young Ok; Kim, Young Joo.

In: IEEE/OSA Journal of Display Technology, Vol. 11, No. 1, 6913493, 01.01.2015, p. 44-52.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Design of integrated light guide plate with functional structure of enhanced diffusion length for ultra-slim LED backlight unit

AU - Moon, Hye Ran

AU - Shin, Min Ho

AU - Lee, Jae Yong

AU - Jang, Kyu Jin

AU - Chung, Young Ok

AU - Kim, Young Joo

PY - 2015/1/1

Y1 - 2015/1/1

N2 - An integrated light guide plate (LGP) with a functional structure for a longer diffusion length to decrease the thickness was proposed and designed for the large area direct-type LED backlight unit (BLU). The integrated LGP is composed of a concave cone structure on the top surface and a rugged bottom surface. The light emitted from the LED sources can be reflected on the top surface and diffuse effectively inside the LGP and in the bottom air-gap, which is placed below the LGP to realize sufficient diffusion length even in the ultra-slim structure. After comparing the optical simulation results with the measured data from the fabricated hexagonal unit cell of an LGP, we verified our design concept and realized the integrated LGP. The final LGP for a 55-inch LED display shows a brightness uniformity of 90.5% with a reduced number of 81 LEDs and a thickness of 6 mm, a remarkably reduced value compared with previous direct-type large area LED backlight units.

AB - An integrated light guide plate (LGP) with a functional structure for a longer diffusion length to decrease the thickness was proposed and designed for the large area direct-type LED backlight unit (BLU). The integrated LGP is composed of a concave cone structure on the top surface and a rugged bottom surface. The light emitted from the LED sources can be reflected on the top surface and diffuse effectively inside the LGP and in the bottom air-gap, which is placed below the LGP to realize sufficient diffusion length even in the ultra-slim structure. After comparing the optical simulation results with the measured data from the fabricated hexagonal unit cell of an LGP, we verified our design concept and realized the integrated LGP. The final LGP for a 55-inch LED display shows a brightness uniformity of 90.5% with a reduced number of 81 LEDs and a thickness of 6 mm, a remarkably reduced value compared with previous direct-type large area LED backlight units.

UR - http://www.scopus.com/inward/record.url?scp=84922512695&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84922512695&partnerID=8YFLogxK

U2 - 10.1109/JDT.2014.2359932

DO - 10.1109/JDT.2014.2359932

M3 - Article

AN - SCOPUS:84922512695

VL - 11

SP - 44

EP - 52

JO - IEEE/OSA Journal of Display Technology

JF - IEEE/OSA Journal of Display Technology

SN - 1551-319X

IS - 1

M1 - 6913493

ER -