High efficiency and/or low cost LED backlight system for color sequential technique in color filter-less LCD system

Chun Yu Hsieh; Shih Jung Wang; Yu Huei Lee; Ke-Horng Chen; Ming Tsung Ho

doi:10.1889/1.3069329

High efficiency and/or low cost LED backlight system for color sequential technique in color filter-less LCD system

Chun Yu Hsieh^*, Shih Jung Wang, Yu Huei Lee, Ke-Horng Chen, Ming Tsung Ho

^*Corresponding author for this work

Department of Electrical and Computer Engineering

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

This paper proposes a design methodology for implementing a high efficiency and/or a low cost RGB backlight module in color sequential notebook computers' display. A RGB LED driver composed of an asynchronous 1.5MHz DC/DC boost converter with dual loop control is fabricated by TSMC 0.25 μm BCD 40V to generate 17V or 21V output voltage to turn on more than 6 series-red, 6 series-green, or series-blue LEDs at the same time for the notebooks' backlight. Besides, charge-recycling technique is used to restore extra energy at the output node when switching to different forwarding light emitting diodes (LEDs) and release the energy next time. The total power consumption of a 15.4' LCD panel of a notebook computer can be reduced from 5W to about 2-3 W.

Original language	English
Pages (from-to)	1104-1107
Number of pages	4
Journal	Digest of Technical Papers - SID International Symposium
Volume	39
Issue number	2
DOIs	https://doi.org/10.1889/1.3069329
State	Published - 30 Oct 2008
Event	2008 SID International Symposium - Los Angeles, CA, United States Duration: 20 May 2008 → 21 May 2008

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title = "High efficiency and/or low cost LED backlight system for color sequential technique in color filter-less LCD system",

abstract = "This paper proposes a design methodology for implementing a high efficiency and/or a low cost RGB backlight module in color sequential notebook computers' display. A RGB LED driver composed of an asynchronous 1.5MHz DC/DC boost converter with dual loop control is fabricated by TSMC 0.25 μm BCD 40V to generate 17V or 21V output voltage to turn on more than 6 series-red, 6 series-green, or series-blue LEDs at the same time for the notebooks' backlight. Besides, charge-recycling technique is used to restore extra energy at the output node when switching to different forwarding light emitting diodes (LEDs) and release the energy next time. The total power consumption of a 15.4' LCD panel of a notebook computer can be reduced from 5W to about 2-3 W.",

author = "Hsieh, {Chun Yu} and Wang, {Shih Jung} and Lee, {Yu Huei} and Ke-Horng Chen and Ho, {Ming Tsung}",

year = "2008",

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doi = "10.1889/1.3069329",

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pages = "1104--1107",

journal = "Digest of Technical Papers - SID International Symposium",

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number = "2",

note = "null ; Conference date: 20-05-2008 Through 21-05-2008",

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High efficiency and/or low cost LED backlight system for color sequential technique in color filter-less LCD system. / Hsieh, Chun Yu; Wang, Shih Jung; Lee, Yu Huei; Chen, Ke-Horng; Ho, Ming Tsung.

In: Digest of Technical Papers - SID International Symposium, Vol. 39, No. 2, 30.10.2008, p. 1104-1107.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - High efficiency and/or low cost LED backlight system for color sequential technique in color filter-less LCD system

AU - Hsieh, Chun Yu

AU - Wang, Shih Jung

AU - Lee, Yu Huei

AU - Chen, Ke-Horng

AU - Ho, Ming Tsung

PY - 2008/10/30

Y1 - 2008/10/30

N2 - This paper proposes a design methodology for implementing a high efficiency and/or a low cost RGB backlight module in color sequential notebook computers' display. A RGB LED driver composed of an asynchronous 1.5MHz DC/DC boost converter with dual loop control is fabricated by TSMC 0.25 μm BCD 40V to generate 17V or 21V output voltage to turn on more than 6 series-red, 6 series-green, or series-blue LEDs at the same time for the notebooks' backlight. Besides, charge-recycling technique is used to restore extra energy at the output node when switching to different forwarding light emitting diodes (LEDs) and release the energy next time. The total power consumption of a 15.4' LCD panel of a notebook computer can be reduced from 5W to about 2-3 W.

AB - This paper proposes a design methodology for implementing a high efficiency and/or a low cost RGB backlight module in color sequential notebook computers' display. A RGB LED driver composed of an asynchronous 1.5MHz DC/DC boost converter with dual loop control is fabricated by TSMC 0.25 μm BCD 40V to generate 17V or 21V output voltage to turn on more than 6 series-red, 6 series-green, or series-blue LEDs at the same time for the notebooks' backlight. Besides, charge-recycling technique is used to restore extra energy at the output node when switching to different forwarding light emitting diodes (LEDs) and release the energy next time. The total power consumption of a 15.4' LCD panel of a notebook computer can be reduced from 5W to about 2-3 W.

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DO - 10.1889/1.3069329

M3 - Conference article

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EP - 1107

JO - Digest of Technical Papers - SID International Symposium

JF - Digest of Technical Papers - SID International Symposium

SN - 0097-966X

IS - 2

Y2 - 20 May 2008 through 21 May 2008

ER -

High efficiency and/or low cost LED backlight system for color sequential technique in color filter-less LCD system

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