Design and fabrication of the concentric circle light guiding plate for LED-backlight module by MEMS technique

Chien, Chao-Heng; Chen, Zhipeng

doi:10.1007/s00542-006-0365-y

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…Many optical components with microstructure on both sides have better optical performance. For instance, Chien et al performed experiments to replicate micro-pyramid and V-cut microstructures on the upper and lower surfaces of PMMA substrates using conventional hot embossing [1]. The experiment confirmed that devices with double-sided microfeatured patterns have better optical properties and functions than those with a microfeatured pattern only on one side.…”

Section: Introductionmentioning

confidence: 99%

Imprinting of double-sided microstructures with rapid induction heating and gas-assisted pressuring

Shih¹,

Kao²,

Ke³

et al. 2017

J. Micromech. Microeng.

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Many components need microstructures on both upper and lower surfaces for integrating and enhancing functions. For the replication of microstructures on the polymeric substrate, hot embossing is an inexpensive and flexible method. However, the cycle time is too long and the embossing pressure is not uniform. This study is devoted to developing an innovative hot embossing system, which integrates induction heating and gas-assisted pressuring for the imprinting of double-sided microstructures. In this study, a wrapped coil for induction heating was designed, implemented, and tested. Then, an apparatus with wrapped coils for induction heating and gas pressuring for hot embossing was designed and constructed in a chamber. Experiments showed that the cycle time can be reduced to 4 min. V-cut patterns and microlens array had been successfully replicated on both surfaces of the polycarbonate substrates. The replication rates were above 95%. This study proves the potential of induction heating gas-assisted embossing for rapid replication of double-sided microstructures for industrial applications.

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Section: Introductionmentioning

confidence: 99%

Imprinting of double-sided microstructures with rapid induction heating and gas-assisted pressuring

Shih¹,

Kao²,

Ke³

et al. 2017

J. Micromech. Microeng.

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“…Feng et al [9] approved a design concept of integrated LGP based on microstructures using polymethylmethacrylate (PMMA) material, to control the illuminative angle. Chien [10,11] recommended the integrated light guide plate on microstructure-based by using Microelectromechanical Systems (MEMS) technique for BLU application. There are also many patents, which have been proposed for small size LCD backlight panel [12, 13, 14].…”

Section: Introductionmentioning

confidence: 99%

An integrated LED luminance-uniform device for light guide plate applications

Chien

Chen

2007

SPIE Proceedings

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An edge-backlight unit (EBLU) is applied to as the light device to provide uniform light of liquid crystal display (LCD). Generally, cathode cold fluorescent lamp (CCFL) is utilized to be the light source of BLU. With the advantages like long life, no mercury containing and good endurance of heavy impact, the light emitting diode (LED) is well known as a viable device for solid state lighting. To achieve the market requirement of the thin-film liquid crystal display (LCD) and the green-level product, the LED is replaced the CCFL used in monitor to make display thinner, lighter, no Hg containing. In this paper, the integrated LED luminance-uniform device with right angle microprism structure is proposed that it can make the point-like light to distribute propagating-light line pattern successfully. To optimize the distributions and sizes of microprisms, our designed LED-linear device can achieve an optical efficiency more than 85%, and its light output area is 2.5 times the input light source. Therefore, the LED luminous device with microprsims not only can decrease the LED to save the space, but also enhance the luminous efficiency. In future, an integrated LED luminance-uniform device could make displays thinner and brighter for light guide plate (LGP) applications.

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Functional imprinting structures on GaN-based light-emitting diodes for light pattern modulation and light extraction efficiency enhancement

Lee

et al. 2010

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Design and fabrication of the concentric circle light guiding plate for LED-backlight module by MEMS technique

Cited by 7 publications

References 3 publications

Imprinting of double-sided microstructures with rapid induction heating and gas-assisted pressuring

Imprinting of double-sided microstructures with rapid induction heating and gas-assisted pressuring

An integrated LED luminance-uniform device for light guide plate applications

Functional imprinting structures on GaN-based light-emitting diodes for light pattern modulation and light extraction efficiency enhancement

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