Abstract

As the demand of larger and thinner flat panel display increasing, conventional methods such as injection molding and hot embossing to fabricate light guide plates (LGPs) become difficult and unsuitable. This study reports a low-cost and high-throughput method to fabricate large-size (320 mm × 240 mm, 15” in diagonal) LGPs by using UV-based imprinting process. With the UV-based imprinting process, a large-size LGP with thickness down to 0.8 mm has been successfully fabricated. The optical property of fabricated LGP has been verified. This study has demonstrated the fabrication of large-size and thin LGPs by using UV-based imprinting process, and the possibility of UV-based imprinting process for fabricating other large thin optical elements.

© 2008 Optical Society of America

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References

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  1. Y. K. Shen, W. Y. Wu, S. Y. Yang, H. M. Jian, and C. C. Chen, "Study on Numerical Simulation and Experiment of Light guide plate in injection molding," J. Reinforced Plastics Composites 23, 1187-1206 (2003).
    [CrossRef]
  2. J. H. Lee, H. S. Lee, B. K. Lee, W. S. Choi, and H. Y. Choi, "Simple liquid crystal display backlight unit comprising only a single-sheet micropatterned polydimethylsiloxane (PDMS) light-guide plate," Opt. Lett. 32, 2665-2667 (2007).
    [CrossRef] [PubMed]
  3. S. R. Park, O. J. Kwon, D. Shin, S. H. Song, H. S. Lee, and H. Y. Choi, "Grating micro-dot patterned light guide plates for LED backlights," Opt. Express 15, 2888-2899 (2006).
    [CrossRef]
  4. C. H. Wu and C. H. Lu, "Fabrication of an LCD light guide plate using closed-die hot embossing," J. Micromech. Microeng. 18, 035006 (2008).
    [CrossRef]
  5. P. H. Huang, T. C. Huang, Y. T. Sun, and S. Y. Yang, "Fabrication of large area resin microlens array using gas-assisted ultraviolet embossing," Opt. Express 16, 3041-3048 (2008).
    [CrossRef] [PubMed]

2008 (2)

C. H. Wu and C. H. Lu, "Fabrication of an LCD light guide plate using closed-die hot embossing," J. Micromech. Microeng. 18, 035006 (2008).
[CrossRef]

P. H. Huang, T. C. Huang, Y. T. Sun, and S. Y. Yang, "Fabrication of large area resin microlens array using gas-assisted ultraviolet embossing," Opt. Express 16, 3041-3048 (2008).
[CrossRef] [PubMed]

2007 (1)

2006 (1)

2003 (1)

Y. K. Shen, W. Y. Wu, S. Y. Yang, H. M. Jian, and C. C. Chen, "Study on Numerical Simulation and Experiment of Light guide plate in injection molding," J. Reinforced Plastics Composites 23, 1187-1206 (2003).
[CrossRef]

Chen, C. C.

Y. K. Shen, W. Y. Wu, S. Y. Yang, H. M. Jian, and C. C. Chen, "Study on Numerical Simulation and Experiment of Light guide plate in injection molding," J. Reinforced Plastics Composites 23, 1187-1206 (2003).
[CrossRef]

Choi, H. Y.

Choi, W. S.

Huang, P. H.

Huang, T. C.

Jian, H. M.

Y. K. Shen, W. Y. Wu, S. Y. Yang, H. M. Jian, and C. C. Chen, "Study on Numerical Simulation and Experiment of Light guide plate in injection molding," J. Reinforced Plastics Composites 23, 1187-1206 (2003).
[CrossRef]

Kwon, O. J.

Lee, B. K.

Lee, H. S.

Lee, J. H.

Lu, C. H.

C. H. Wu and C. H. Lu, "Fabrication of an LCD light guide plate using closed-die hot embossing," J. Micromech. Microeng. 18, 035006 (2008).
[CrossRef]

Park, S. R.

Shen, Y. K.

Y. K. Shen, W. Y. Wu, S. Y. Yang, H. M. Jian, and C. C. Chen, "Study on Numerical Simulation and Experiment of Light guide plate in injection molding," J. Reinforced Plastics Composites 23, 1187-1206 (2003).
[CrossRef]

Shin, D.

Song, S. H.

Sun, Y. T.

Wu, C. H.

C. H. Wu and C. H. Lu, "Fabrication of an LCD light guide plate using closed-die hot embossing," J. Micromech. Microeng. 18, 035006 (2008).
[CrossRef]

Wu, W. Y.

Y. K. Shen, W. Y. Wu, S. Y. Yang, H. M. Jian, and C. C. Chen, "Study on Numerical Simulation and Experiment of Light guide plate in injection molding," J. Reinforced Plastics Composites 23, 1187-1206 (2003).
[CrossRef]

Yang, S. Y.

P. H. Huang, T. C. Huang, Y. T. Sun, and S. Y. Yang, "Fabrication of large area resin microlens array using gas-assisted ultraviolet embossing," Opt. Express 16, 3041-3048 (2008).
[CrossRef] [PubMed]

Y. K. Shen, W. Y. Wu, S. Y. Yang, H. M. Jian, and C. C. Chen, "Study on Numerical Simulation and Experiment of Light guide plate in injection molding," J. Reinforced Plastics Composites 23, 1187-1206 (2003).
[CrossRef]

J. Micromech. Microeng. (1)

C. H. Wu and C. H. Lu, "Fabrication of an LCD light guide plate using closed-die hot embossing," J. Micromech. Microeng. 18, 035006 (2008).
[CrossRef]

J. Reinforced Plastics Composites (1)

Y. K. Shen, W. Y. Wu, S. Y. Yang, H. M. Jian, and C. C. Chen, "Study on Numerical Simulation and Experiment of Light guide plate in injection molding," J. Reinforced Plastics Composites 23, 1187-1206 (2003).
[CrossRef]

Opt. Express (2)

Opt. Lett. (1)

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Figures (5)

Fig. 1.
Fig. 1.

Schematic diagram showing the apparatus and process of the UV-based imprinting process with gas-assisted pressing mechanism.

Fig. 2.
Fig. 2.

Photograph and OM images of the stainless steel stamper of LGP.

Fig. 3.
Fig. 3.

The fabricated large-size (320mm × 240mm × 0.8 mm) PMMA light guide plate with dots patterns. (a) whole area, (b) and (c) OM images of randomly selected area.

Fig. 4.
Fig. 4.

The laboratory-constructed back light module for inspecting the optical property of fabricated LGP.

Fig. 5.
Fig. 5.

(a) The camera image of lights emanating from the fabricated 320 mm × 240 mm × 0.8 mm LGP when the edge LEDs are on. (b) The corresponding measured light intensity distribution.

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