Abstract

A light guide fully composed of reflective plate has been proposed for a planar illuminator with the light source located at the side edge. Using mirror reflection as the light guiding mechanism increases the light acceptance angle of the light guide, and the hollow structure allows increasing the source coupling area without inducing further weight. Accompanying with the optical films, for example, a diffuser, a prismatic film, and a reflective polarizer to spread light distribution, the uniformity of the prototype has shown the feasibility for a planar illuminator.

© 2008 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. K. Hathaway, J. Hawthorne, and A. Fleischer, “Advancements in backlighting technologies for LCD,” Proc. SPIE 1664, 108-116 (1992)
    [CrossRef]
  2. T. A. Mepham, R. D. Eller, and G. L. Vick, “Luminaire for use in backlighting a liquid crystal display Matrix,” U.S. patent 5,253,151 (12 October 1993).
  3. K. Kashima, N. Yoshida, O. Shoji, E. Yanagi, and T. Fukunishi, “Back lighting device for a panel,” U.S. patent 5,093,765(3 March 1992).
  4. T. Ide, H. Mizuta, H. Numata, Y. Taira, M. Suzuki, M. Noguchi, and Y. Katsu, “Dot pattern generation technology using molecular dynamics,” J. Opt. Soc. Am. A 20, 248-255 (2003).
    [CrossRef]
  5. K. Kalantar, M. Shingo, and O. Tomohisa, “Functional light-guide plate characterized by optical micro-deflector and micro-reflector for LCD backlight,” IEICE Trans. Electron. E84-C, 1637-1646 (2001).
  6. X. Yang, Y. Yan, and G. Jin, “Polarized light-guide plate for liquid crystal display,” Opt. Express 13, 8349-8356 (2005).
    [CrossRef] [PubMed]
  7. M. K. Lamvik, S. Grego, R. LaBennett, and D. Temple, “Polymer light guide arrays for tiling large scale displays,” Proc. SPIE 5443, 196-204 (2004).
    [CrossRef]
  8. W. H. Steel, “Luminosity, throughput, or etendue? Further comments,” Appl. Opt. 14, 252 (1975).
    [CrossRef] [PubMed]
  9. H. T. Wang, C. F Chen, and C. H Chen, “Light weight backlight module with reflective light guide,” SID Symp. Digest 38, 473-475 (2007).
    [CrossRef]
  10. J. M. Lengyel, “Prismatic refracting optical array for liquid flat panel crystal display backlight,” U.S. patent 5,579,134(26 November 1996).
  11. R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).
  12. M. F. Weber, O. Benson Jr., S. Cobb Jr., J. M. Jonza, A. J. Ouderkirk, D. L. Wortman, and C. A. Stover, “Brightness enhancing reflective polarizer,” U.S. patent 7,038,745 (2 May 2006)
  13. M. F. Weber, C. A. Stover, L. R. Gilbert, T. J. Nevitt, and A. J. Ouderkirk, “Giant birefringent optics in multilayer polymer mirrors,” Science 287, 2451-2456 (2000).
    [CrossRef] [PubMed]

2007

H. T. Wang, C. F Chen, and C. H Chen, “Light weight backlight module with reflective light guide,” SID Symp. Digest 38, 473-475 (2007).
[CrossRef]

2005

2004

M. K. Lamvik, S. Grego, R. LaBennett, and D. Temple, “Polymer light guide arrays for tiling large scale displays,” Proc. SPIE 5443, 196-204 (2004).
[CrossRef]

2003

2001

K. Kalantar, M. Shingo, and O. Tomohisa, “Functional light-guide plate characterized by optical micro-deflector and micro-reflector for LCD backlight,” IEICE Trans. Electron. E84-C, 1637-1646 (2001).

2000

M. F. Weber, C. A. Stover, L. R. Gilbert, T. J. Nevitt, and A. J. Ouderkirk, “Giant birefringent optics in multilayer polymer mirrors,” Science 287, 2451-2456 (2000).
[CrossRef] [PubMed]

1992

K. Hathaway, J. Hawthorne, and A. Fleischer, “Advancements in backlighting technologies for LCD,” Proc. SPIE 1664, 108-116 (1992)
[CrossRef]

1975

Allen, R. C.

R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).

Benson, O.

M. F. Weber, O. Benson Jr., S. Cobb Jr., J. M. Jonza, A. J. Ouderkirk, D. L. Wortman, and C. A. Stover, “Brightness enhancing reflective polarizer,” U.S. patent 7,038,745 (2 May 2006)

Carlson, L. W.

R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).

Chen, C. F.

H. T. Wang, C. F Chen, and C. H Chen, “Light weight backlight module with reflective light guide,” SID Symp. Digest 38, 473-475 (2007).
[CrossRef]

Chen, C. H.

H. T. Wang, C. F Chen, and C. H Chen, “Light weight backlight module with reflective light guide,” SID Symp. Digest 38, 473-475 (2007).
[CrossRef]

Cobb, S.

M. F. Weber, O. Benson Jr., S. Cobb Jr., J. M. Jonza, A. J. Ouderkirk, D. L. Wortman, and C. A. Stover, “Brightness enhancing reflective polarizer,” U.S. patent 7,038,745 (2 May 2006)

Eller, R. D.

T. A. Mepham, R. D. Eller, and G. L. Vick, “Luminaire for use in backlighting a liquid crystal display Matrix,” U.S. patent 5,253,151 (12 October 1993).

Fleischer, A.

K. Hathaway, J. Hawthorne, and A. Fleischer, “Advancements in backlighting technologies for LCD,” Proc. SPIE 1664, 108-116 (1992)
[CrossRef]

Fukunishi, T.

K. Kashima, N. Yoshida, O. Shoji, E. Yanagi, and T. Fukunishi, “Back lighting device for a panel,” U.S. patent 5,093,765(3 March 1992).

Gilbert, L. R.

M. F. Weber, C. A. Stover, L. R. Gilbert, T. J. Nevitt, and A. J. Ouderkirk, “Giant birefringent optics in multilayer polymer mirrors,” Science 287, 2451-2456 (2000).
[CrossRef] [PubMed]

Grego, S.

M. K. Lamvik, S. Grego, R. LaBennett, and D. Temple, “Polymer light guide arrays for tiling large scale displays,” Proc. SPIE 5443, 196-204 (2004).
[CrossRef]

Hathaway, K.

K. Hathaway, J. Hawthorne, and A. Fleischer, “Advancements in backlighting technologies for LCD,” Proc. SPIE 1664, 108-116 (1992)
[CrossRef]

Hawthorne, J.

K. Hathaway, J. Hawthorne, and A. Fleischer, “Advancements in backlighting technologies for LCD,” Proc. SPIE 1664, 108-116 (1992)
[CrossRef]

Ide, T.

Jin, G.

Jonza, J. M.

M. F. Weber, O. Benson Jr., S. Cobb Jr., J. M. Jonza, A. J. Ouderkirk, D. L. Wortman, and C. A. Stover, “Brightness enhancing reflective polarizer,” U.S. patent 7,038,745 (2 May 2006)

Kalantar, K.

K. Kalantar, M. Shingo, and O. Tomohisa, “Functional light-guide plate characterized by optical micro-deflector and micro-reflector for LCD backlight,” IEICE Trans. Electron. E84-C, 1637-1646 (2001).

Kashima, K.

K. Kashima, N. Yoshida, O. Shoji, E. Yanagi, and T. Fukunishi, “Back lighting device for a panel,” U.S. patent 5,093,765(3 March 1992).

Katsu, Y.

Kotz, A. L.

R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).

LaBennett, R.

M. K. Lamvik, S. Grego, R. LaBennett, and D. Temple, “Polymer light guide arrays for tiling large scale displays,” Proc. SPIE 5443, 196-204 (2004).
[CrossRef]

Lamvik, M. K.

M. K. Lamvik, S. Grego, R. LaBennett, and D. Temple, “Polymer light guide arrays for tiling large scale displays,” Proc. SPIE 5443, 196-204 (2004).
[CrossRef]

Lengyel, J. M.

J. M. Lengyel, “Prismatic refracting optical array for liquid flat panel crystal display backlight,” U.S. patent 5,579,134(26 November 1996).

Majumdar, B.

R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).

Mepham, T. A.

T. A. Mepham, R. D. Eller, and G. L. Vick, “Luminaire for use in backlighting a liquid crystal display Matrix,” U.S. patent 5,253,151 (12 October 1993).

Mizuta, H.

Nevitt, T. J.

M. F. Weber, C. A. Stover, L. R. Gilbert, T. J. Nevitt, and A. J. Ouderkirk, “Giant birefringent optics in multilayer polymer mirrors,” Science 287, 2451-2456 (2000).
[CrossRef] [PubMed]

R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).

Noguchi, M.

Numata, H.

Ouderkirk, A. J.

M. F. Weber, C. A. Stover, L. R. Gilbert, T. J. Nevitt, and A. J. Ouderkirk, “Giant birefringent optics in multilayer polymer mirrors,” Science 287, 2451-2456 (2000).
[CrossRef] [PubMed]

R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).

M. F. Weber, O. Benson Jr., S. Cobb Jr., J. M. Jonza, A. J. Ouderkirk, D. L. Wortman, and C. A. Stover, “Brightness enhancing reflective polarizer,” U.S. patent 7,038,745 (2 May 2006)

Shingo, M.

K. Kalantar, M. Shingo, and O. Tomohisa, “Functional light-guide plate characterized by optical micro-deflector and micro-reflector for LCD backlight,” IEICE Trans. Electron. E84-C, 1637-1646 (2001).

Shoji, O.

K. Kashima, N. Yoshida, O. Shoji, E. Yanagi, and T. Fukunishi, “Back lighting device for a panel,” U.S. patent 5,093,765(3 March 1992).

Steel, W. H.

Stover, C. A.

M. F. Weber, C. A. Stover, L. R. Gilbert, T. J. Nevitt, and A. J. Ouderkirk, “Giant birefringent optics in multilayer polymer mirrors,” Science 287, 2451-2456 (2000).
[CrossRef] [PubMed]

R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).

M. F. Weber, O. Benson Jr., S. Cobb Jr., J. M. Jonza, A. J. Ouderkirk, D. L. Wortman, and C. A. Stover, “Brightness enhancing reflective polarizer,” U.S. patent 7,038,745 (2 May 2006)

Suzuki, M.

Taira, Y.

Temple, D.

M. K. Lamvik, S. Grego, R. LaBennett, and D. Temple, “Polymer light guide arrays for tiling large scale displays,” Proc. SPIE 5443, 196-204 (2004).
[CrossRef]

Tomohisa, O.

K. Kalantar, M. Shingo, and O. Tomohisa, “Functional light-guide plate characterized by optical micro-deflector and micro-reflector for LCD backlight,” IEICE Trans. Electron. E84-C, 1637-1646 (2001).

Vick, G. L.

T. A. Mepham, R. D. Eller, and G. L. Vick, “Luminaire for use in backlighting a liquid crystal display Matrix,” U.S. patent 5,253,151 (12 October 1993).

Wang, H. T.

H. T. Wang, C. F Chen, and C. H Chen, “Light weight backlight module with reflective light guide,” SID Symp. Digest 38, 473-475 (2007).
[CrossRef]

Weber, M. F.

M. F. Weber, C. A. Stover, L. R. Gilbert, T. J. Nevitt, and A. J. Ouderkirk, “Giant birefringent optics in multilayer polymer mirrors,” Science 287, 2451-2456 (2000).
[CrossRef] [PubMed]

R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).

M. F. Weber, O. Benson Jr., S. Cobb Jr., J. M. Jonza, A. J. Ouderkirk, D. L. Wortman, and C. A. Stover, “Brightness enhancing reflective polarizer,” U.S. patent 7,038,745 (2 May 2006)

Wortman, D. L.

M. F. Weber, O. Benson Jr., S. Cobb Jr., J. M. Jonza, A. J. Ouderkirk, D. L. Wortman, and C. A. Stover, “Brightness enhancing reflective polarizer,” U.S. patent 7,038,745 (2 May 2006)

Yan, Y.

Yanagi, E.

K. Kashima, N. Yoshida, O. Shoji, E. Yanagi, and T. Fukunishi, “Back lighting device for a panel,” U.S. patent 5,093,765(3 March 1992).

Yang, X.

Yoshida, N.

K. Kashima, N. Yoshida, O. Shoji, E. Yanagi, and T. Fukunishi, “Back lighting device for a panel,” U.S. patent 5,093,765(3 March 1992).

Appl. Opt.

IEICE Trans. Electron.

K. Kalantar, M. Shingo, and O. Tomohisa, “Functional light-guide plate characterized by optical micro-deflector and micro-reflector for LCD backlight,” IEICE Trans. Electron. E84-C, 1637-1646 (2001).

J. Opt. Soc. Am. A

Opt. Express

Proc. SPIE

K. Hathaway, J. Hawthorne, and A. Fleischer, “Advancements in backlighting technologies for LCD,” Proc. SPIE 1664, 108-116 (1992)
[CrossRef]

M. K. Lamvik, S. Grego, R. LaBennett, and D. Temple, “Polymer light guide arrays for tiling large scale displays,” Proc. SPIE 5443, 196-204 (2004).
[CrossRef]

Science

M. F. Weber, C. A. Stover, L. R. Gilbert, T. J. Nevitt, and A. J. Ouderkirk, “Giant birefringent optics in multilayer polymer mirrors,” Science 287, 2451-2456 (2000).
[CrossRef] [PubMed]

SID Symp. Digest

H. T. Wang, C. F Chen, and C. H Chen, “Light weight backlight module with reflective light guide,” SID Symp. Digest 38, 473-475 (2007).
[CrossRef]

Other

J. M. Lengyel, “Prismatic refracting optical array for liquid flat panel crystal display backlight,” U.S. patent 5,579,134(26 November 1996).

R. C. Allen, L. W. Carlson, A. J. Ouderkirk, M. F. Weber, A. L. Kotz, T. J. Nevitt, C. A. Stover, and B. Majumdar, “Brightness enhancement film,” U.S. patent 6,111,696 (29 August 2000).

M. F. Weber, O. Benson Jr., S. Cobb Jr., J. M. Jonza, A. J. Ouderkirk, D. L. Wortman, and C. A. Stover, “Brightness enhancing reflective polarizer,” U.S. patent 7,038,745 (2 May 2006)

T. A. Mepham, R. D. Eller, and G. L. Vick, “Luminaire for use in backlighting a liquid crystal display Matrix,” U.S. patent 5,253,151 (12 October 1993).

K. Kashima, N. Yoshida, O. Shoji, E. Yanagi, and T. Fukunishi, “Back lighting device for a panel,” U.S. patent 5,093,765(3 March 1992).

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (12)

Fig. 1
Fig. 1

Structure of reflective light guide module.

Fig. 2
Fig. 2

Light distribution between two slits with a tilt reflective plate.

Fig. 3
Fig. 3

Optical films: (a) diffuser, (b) prismatic film, (c) reflective polarizer.

Fig. 4
Fig. 4

Ray analysis of propagating light in reflective light guide.

Fig. 5
Fig. 5

Ray diagram of light leaking from slits (a) slit 1 and (b) slit 2. (c) Overlapping region of (a) and (b).

Fig. 6
Fig. 6

Structure and denotation of the reflective light guide.

Fig. 7
Fig. 7

Simulation result of uniformity. (a) Illuminance distribution. (b) Illuminance variation along the light guiding direction. (c) Illuminance variation along the light guiding direction. (d) Average intensity in each zone between two adjacent slits.

Fig. 8
Fig. 8

Angular distribution at the exit plane of the light guide (a) without and (b) with prismatic film.

Fig. 9
Fig. 9

Prototype of (a) reflective light guide and (b) reflective light guide on a stretching mechanics.

Fig. 10
Fig. 10

Result with different combinations of optical films: (a) one diffuser, (b) one diffuser + one prismatic film, (c) one diffuser + one cross-pair prismatic film, (d) one diffuser + one cross-pair prismatic film rotated at 30 ° , (e) one diffuser + one cross-pair prismatic film rotated at 30 ° + one reflective polarizer.

Fig. 11
Fig. 11

Polarizer on the planar illuminator. (a) Transmission axis of polarizer in vertical direction. (b) Transmission axis of polarizer in horizontal direction.

Fig. 12
Fig. 12

ANSI nine points of luminance of the reflective light guide. Units: nits.

Tables (1)

Tables Icon

Table 1 Slit Location, Slit Width, and Angle of Tilt Plate on the Reflective Light Guide

Equations (1)

Equations on this page are rendered with MathJax. Learn more.

Φ 1 A 1 = Φ 2 A 2 = = Φ M A M ,

Metrics