Abstract

A light bar patterned using a submicrometer grating was designed to replace conventional dye color filters for color liquid crystal displays. The light bar generates color rays by transmitting them from side-lit color light-emitting diodes through the submicrometer grating. These angular color rays are then redirected by a V-grooved light guide, and then converged by a lens array and mapped to corresponding subpixel positions to efficiently display color images. The results show that 106% of the National Television System Committee (NTSC) color space in a blue-green-red-green (B-G-R-G) repeating pattern display pixel layout can be achieved.

© 2013 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  8. M. J. J. Jak, R. Caputo, E. J. Hornix, L. de Sio, D. K. G. de Boer, and H. J. Cornelissen, “Color-separating backlight for improved LCD efficiency,” J. Soc. Inf. Disp. 16, 803–810 (2008).
    [CrossRef]
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    [CrossRef]
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    [CrossRef]
  14. P.-C. Chen, P. H. Yao, C.-H. Chen, and C. H. Lee, “Color separation backlight system with mosaic pixel arrangements,” SID ‘10 Digest 41, 1100–1103 (2010).
  15. C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
    [CrossRef]
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    [CrossRef]
  19. C. H. Lee, “Angularly positioned LED-based spatial-temporal color separation system,” Opt. Express 20, 19109–19118 (2012).
    [CrossRef]

2012

J. Kimmel, “Review paper: diffractive backlight technologies for mobile applications,” J. Soc. Inf. Disp. 20, 245–258 (2012).
[CrossRef]

R.-Z. Li, J. Yan, X. Y. Zhang, and T. Zhang, “Design of color backlight for high efficiency display using optical waveguide gratings,” SID ‘12 Digest 43, 901–904 (2012).
[CrossRef]

C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
[CrossRef]

C. H. Lee, “Angularly positioned LED-based spatial-temporal color separation system,” Opt. Express 20, 19109–19118 (2012).
[CrossRef]

2011

C. W. Liu, C. H. Lee, and S. C. Lin, “Sub-wavelength gratings fabricated on a light bar by roll-to-roll UV embossing process,” Opt. Express 19, 11299–11311 (2011).
[CrossRef]

C. Y. Chen, Q. L. Deng, and H. H. Lin, “Design of a symmetric blazed grating sheet embedded in an autostereoscopic display,” Opt. Lett 36, 3422–3424 (2011).
[CrossRef]

2010

P.-C. Chen, P. H. Yao, C.-H. Chen, and C. H. Lee, “Color separation backlight system with mosaic pixel arrangements,” SID ‘10 Digest 41, 1100–1103 (2010).

P.-C. Chen, H.-H. Lin, C.-H. Chen, C.-H. Lee, and M.-H. Lu, “Color separation system with angularly positioned light source module for pixelized backlighting,” Opt. Express 18, 645–655 (2010).
[CrossRef]

2009

2008

M. J. J. Jak, R. Caputo, E. J. Hornix, L. de Sio, D. K. G. de Boer, and H. J. Cornelissen, “Color-separating backlight for improved LCD efficiency,” J. Soc. Inf. Disp. 16, 803–810 (2008).
[CrossRef]

2007

2006

D. K. G. de Boer, R. Caputo, H. J. Cornelissen, C. M. van Heesch, E. J. Hornix, and M. J. J. Jak, “Diffractive grating structures for colour-separating backlights,” Proc. SPIE 6196, 61960R (2006).
[CrossRef]

2003

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

2002

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

2000

S. W. Fan, “Vector theory analysis and numerical calculation for any shape profile dielectric gratings,” Opt. Precis. Eng. 8, 5–10 (2000).

1978

Bathiche, S.

Caputo, R.

M. J. J. Jak, R. Caputo, E. J. Hornix, L. de Sio, D. K. G. de Boer, and H. J. Cornelissen, “Color-separating backlight for improved LCD efficiency,” J. Soc. Inf. Disp. 16, 803–810 (2008).
[CrossRef]

R. Caputo, L. De Sio, M. J. J. Jak, E. J. Hornix, D. K. G. de Boer, and H. J. Cornelissen, “Short period holographic structures for backlight display applications,” Opt. Express 15, 10540–10552 (2007).
[CrossRef]

D. K. G. de Boer, R. Caputo, H. J. Cornelissen, C. M. van Heesch, E. J. Hornix, and M. J. J. Jak, “Diffractive grating structures for colour-separating backlights,” Proc. SPIE 6196, 61960R (2006).
[CrossRef]

Chen, C. H.

C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
[CrossRef]

Chen, C. Y.

C. Y. Chen, Q. L. Deng, and H. H. Lin, “Design of a symmetric blazed grating sheet embedded in an autostereoscopic display,” Opt. Lett 36, 3422–3424 (2011).
[CrossRef]

Chen, C.-H.

P.-C. Chen, P. H. Yao, C.-H. Chen, and C. H. Lee, “Color separation backlight system with mosaic pixel arrangements,” SID ‘10 Digest 41, 1100–1103 (2010).

P.-C. Chen, H.-H. Lin, C.-H. Chen, C.-H. Lee, and M.-H. Lu, “Color separation system with angularly positioned light source module for pixelized backlighting,” Opt. Express 18, 645–655 (2010).
[CrossRef]

Chen, P.-C.

P.-C. Chen, H.-H. Lin, C.-H. Chen, C.-H. Lee, and M.-H. Lu, “Color separation system with angularly positioned light source module for pixelized backlighting,” Opt. Express 18, 645–655 (2010).
[CrossRef]

P.-C. Chen, P. H. Yao, C.-H. Chen, and C. H. Lee, “Color separation backlight system with mosaic pixel arrangements,” SID ‘10 Digest 41, 1100–1103 (2010).

Colgan, E. G.

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

Cornelissen, H. J.

M. J. J. Jak, R. Caputo, E. J. Hornix, L. de Sio, D. K. G. de Boer, and H. J. Cornelissen, “Color-separating backlight for improved LCD efficiency,” J. Soc. Inf. Disp. 16, 803–810 (2008).
[CrossRef]

R. Caputo, L. De Sio, M. J. J. Jak, E. J. Hornix, D. K. G. de Boer, and H. J. Cornelissen, “Short period holographic structures for backlight display applications,” Opt. Express 15, 10540–10552 (2007).
[CrossRef]

D. K. G. de Boer, R. Caputo, H. J. Cornelissen, C. M. van Heesch, E. J. Hornix, and M. J. J. Jak, “Diffractive grating structures for colour-separating backlights,” Proc. SPIE 6196, 61960R (2006).
[CrossRef]

Dammann, H.

de Boer, D. K. G.

M. J. J. Jak, R. Caputo, E. J. Hornix, L. de Sio, D. K. G. de Boer, and H. J. Cornelissen, “Color-separating backlight for improved LCD efficiency,” J. Soc. Inf. Disp. 16, 803–810 (2008).
[CrossRef]

R. Caputo, L. De Sio, M. J. J. Jak, E. J. Hornix, D. K. G. de Boer, and H. J. Cornelissen, “Short period holographic structures for backlight display applications,” Opt. Express 15, 10540–10552 (2007).
[CrossRef]

D. K. G. de Boer, R. Caputo, H. J. Cornelissen, C. M. van Heesch, E. J. Hornix, and M. J. J. Jak, “Diffractive grating structures for colour-separating backlights,” Proc. SPIE 6196, 61960R (2006).
[CrossRef]

de Sio, L.

M. J. J. Jak, R. Caputo, E. J. Hornix, L. de Sio, D. K. G. de Boer, and H. J. Cornelissen, “Color-separating backlight for improved LCD efficiency,” J. Soc. Inf. Disp. 16, 803–810 (2008).
[CrossRef]

R. Caputo, L. De Sio, M. J. J. Jak, E. J. Hornix, D. K. G. de Boer, and H. J. Cornelissen, “Short period holographic structures for backlight display applications,” Opt. Express 15, 10540–10552 (2007).
[CrossRef]

Deng, Q. L.

C. Y. Chen, Q. L. Deng, and H. H. Lin, “Design of a symmetric blazed grating sheet embedded in an autostereoscopic display,” Opt. Lett 36, 3422–3424 (2011).
[CrossRef]

Emerton, N.

Fan, S. W.

S. W. Fan, “Vector theory analysis and numerical calculation for any shape profile dielectric gratings,” Opt. Precis. Eng. 8, 5–10 (2000).

Fu, C. C.

C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
[CrossRef]

Hecht, E.

E. Hecht, Optics (Addison Wesley, 2001), pp. 100–104.

Hornix, E. J.

M. J. J. Jak, R. Caputo, E. J. Hornix, L. de Sio, D. K. G. de Boer, and H. J. Cornelissen, “Color-separating backlight for improved LCD efficiency,” J. Soc. Inf. Disp. 16, 803–810 (2008).
[CrossRef]

R. Caputo, L. De Sio, M. J. J. Jak, E. J. Hornix, D. K. G. de Boer, and H. J. Cornelissen, “Short period holographic structures for backlight display applications,” Opt. Express 15, 10540–10552 (2007).
[CrossRef]

D. K. G. de Boer, R. Caputo, H. J. Cornelissen, C. M. van Heesch, E. J. Hornix, and M. J. J. Jak, “Diffractive grating structures for colour-separating backlights,” Proc. SPIE 6196, 61960R (2006).
[CrossRef]

Huang, M. C.

C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
[CrossRef]

Jak, M. J. J.

M. J. J. Jak, R. Caputo, E. J. Hornix, L. de Sio, D. K. G. de Boer, and H. J. Cornelissen, “Color-separating backlight for improved LCD efficiency,” J. Soc. Inf. Disp. 16, 803–810 (2008).
[CrossRef]

R. Caputo, L. De Sio, M. J. J. Jak, E. J. Hornix, D. K. G. de Boer, and H. J. Cornelissen, “Short period holographic structures for backlight display applications,” Opt. Express 15, 10540–10552 (2007).
[CrossRef]

D. K. G. de Boer, R. Caputo, H. J. Cornelissen, C. M. van Heesch, E. J. Hornix, and M. J. J. Jak, “Diffractive grating structures for colour-separating backlights,” Proc. SPIE 6196, 61960R (2006).
[CrossRef]

Kimmel, J.

J. Kimmel, “Review paper: diffractive backlight technologies for mobile applications,” J. Soc. Inf. Disp. 20, 245–258 (2012).
[CrossRef]

Large, T.

Lee, C. H.

Lee, C.-H.

Li, R.-Z.

R.-Z. Li, J. Yan, X. Y. Zhang, and T. Zhang, “Design of color backlight for high efficiency display using optical waveguide gratings,” SID ‘12 Digest 43, 901–904 (2012).
[CrossRef]

Lin, H. H.

C. Y. Chen, Q. L. Deng, and H. H. Lin, “Design of a symmetric blazed grating sheet embedded in an autostereoscopic display,” Opt. Lett 36, 3422–3424 (2011).
[CrossRef]

H. H. Lin, C. H. Lee, and M. H. Lu, “Dye-less color filter fabricated by roll-to-roll imprinting for liquid crystal display applications,” Opt. Express 17, 12397–12406 (2009).
[CrossRef]

Lin, H.-H.

Lin, S. C.

Liu, C. W.

Lu, M. H.

Lu, M.-H.

Nakano, D.

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

Nishikai, A.

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

Noguchi, M.

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

Numata, H.

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

Ono, S.

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

F. Yamada, S. Ono, and Y. Taira, “Dual layered very thin flat surface micron prism array directly molded in an LCD cell,” in Eurodisplay 2002 (VDE-Verlag, 2002) pp. 339–342.

Sher, C. W.

C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
[CrossRef]

Singh, R.

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

Sueoka, K.

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

Suzuki, M.

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

Taira, Y.

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

F. Yamada, S. Ono, and Y. Taira, “Dual layered very thin flat surface micron prism array directly molded in an LCD cell,” in Eurodisplay 2002 (VDE-Verlag, 2002) pp. 339–342.

Travis, A.

van Heesch, C. M.

D. K. G. de Boer, R. Caputo, H. J. Cornelissen, C. M. van Heesch, E. J. Hornix, and M. J. J. Jak, “Diffractive grating structures for colour-separating backlights,” Proc. SPIE 6196, 61960R (2006).
[CrossRef]

Wu, Y. P.

C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
[CrossRef]

Yamada, F.

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

F. Yamada, S. Ono, and Y. Taira, “Dual layered very thin flat surface micron prism array directly molded in an LCD cell,” in Eurodisplay 2002 (VDE-Verlag, 2002) pp. 339–342.

Yan, J.

R.-Z. Li, J. Yan, X. Y. Zhang, and T. Zhang, “Design of color backlight for high efficiency display using optical waveguide gratings,” SID ‘12 Digest 43, 901–904 (2012).
[CrossRef]

Yang, C. R.

C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
[CrossRef]

Yao, P. H.

C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
[CrossRef]

P.-C. Chen, P. H. Yao, C.-H. Chen, and C. H. Lee, “Color separation backlight system with mosaic pixel arrangements,” SID ‘10 Digest 41, 1100–1103 (2010).

Zhang, T.

R.-Z. Li, J. Yan, X. Y. Zhang, and T. Zhang, “Design of color backlight for high efficiency display using optical waveguide gratings,” SID ‘12 Digest 43, 901–904 (2012).
[CrossRef]

Zhang, X. Y.

R.-Z. Li, J. Yan, X. Y. Zhang, and T. Zhang, “Design of color backlight for high efficiency display using optical waveguide gratings,” SID ‘12 Digest 43, 901–904 (2012).
[CrossRef]

Appl. Opt.

J. Soc. Inf. Disp.

J. Kimmel, “Review paper: diffractive backlight technologies for mobile applications,” J. Soc. Inf. Disp. 20, 245–258 (2012).
[CrossRef]

M. J. J. Jak, R. Caputo, E. J. Hornix, L. de Sio, D. K. G. de Boer, and H. J. Cornelissen, “Color-separating backlight for improved LCD efficiency,” J. Soc. Inf. Disp. 16, 803–810 (2008).
[CrossRef]

Opt. Express

Opt. Lett

C. Y. Chen, Q. L. Deng, and H. H. Lin, “Design of a symmetric blazed grating sheet embedded in an autostereoscopic display,” Opt. Lett 36, 3422–3424 (2011).
[CrossRef]

Opt. Precis. Eng.

S. W. Fan, “Vector theory analysis and numerical calculation for any shape profile dielectric gratings,” Opt. Precis. Eng. 8, 5–10 (2000).

Proc. SPIE

D. K. G. de Boer, R. Caputo, H. J. Cornelissen, C. M. van Heesch, E. J. Hornix, and M. J. J. Jak, “Diffractive grating structures for colour-separating backlights,” Proc. SPIE 6196, 61960R (2006).
[CrossRef]

SID ‘02 Digest

Y. Taira, D. Nakano, H. Numata, A. Nishikai, S. Ono, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Low-power LCD using a novel optical system,” SID ‘02 Digest 50, 1313–1315 (2002).
[CrossRef]

SID ‘03 Digest

Y. Taira, H. Numata, D. Nakano, K. Sueoka, F. Yamada, M. Suzuki, M. Noguchi, R. Singh, and E. G. Colgan, “Color filterless liquid crystal display illuminated with LEDs,” SID ‘03 Digest 34, 1250–1253 (2003).
[CrossRef]

SID ‘10 Digest

P.-C. Chen, P. H. Yao, C.-H. Chen, and C. H. Lee, “Color separation backlight system with mosaic pixel arrangements,” SID ‘10 Digest 41, 1100–1103 (2010).

SID ‘12 Digest

C. R. Yang, P. H. Yao, C. W. Sher, C. H. Chen, M. C. Huang, Y. P. Wu, and C. C. Fu, “Pixelized backlight with polarization recycling for LCDs,” SID ‘12 Digest 43749–752 (2012).
[CrossRef]

R.-Z. Li, J. Yan, X. Y. Zhang, and T. Zhang, “Design of color backlight for high efficiency display using optical waveguide gratings,” SID ‘12 Digest 43, 901–904 (2012).
[CrossRef]

Other

F. Yamada, S. Ono, and Y. Taira, “Dual layered very thin flat surface micron prism array directly molded in an LCD cell,” in Eurodisplay 2002 (VDE-Verlag, 2002) pp. 339–342.

E. Hecht, Optics (Addison Wesley, 2001), pp. 100–104.

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Figures (17)

Fig. 1.
Fig. 1.

(a) Schematic configuration of the color-separation backlight using a suitable arrangement of LEDs and (b) the designed backlight system.

Fig. 2.
Fig. 2.

B-G-R-G-B rays diffracting from the submicrometer grating on the light bar module.

Fig. 3.
Fig. 3.

Effects of light bar angle on light uniformity on the top surface of light bar.

Fig. 4.
Fig. 4.

Geometry of the submicrometer grating.

Fig. 5.
Fig. 5.

Relationship between the grating depth h and the average diffraction efficiency of (a) red spectra (621 nm), (b) green spectra (543 nm), and (c) blue spectra (468 nm) under different cp values.

Fig. 6.
Fig. 6.

Effects of grating shapes and the R-G-B-G-R (period=320nm) and B-G-R-G-B (period=464nm) patterns on the diffraction efficiency.

Fig. 7.
Fig. 7.

Diffraction efficiency as a function of visible wavelength and incident angles for period 464 nm of the micrometer grating with profile of 90° vertex angle grooves.

Fig. 8.
Fig. 8.

Arrangement of B-G-R-G distribution to a lens array performs a suitable angular-color separation.

Fig. 9.
Fig. 9.

(a) Simulation of the lens array on the light guide. (b) Full pixel of B-G-R-G patterns.

Fig. 10.
Fig. 10.

Schematic diagram showing the roll-to-roll process.

Fig. 11.
Fig. 11.

Pictures of the roller for imprinting the submicrometer grating.

Fig. 12.
Fig. 12.

SEM image of the (a) top view and (b) cross-sectional profile of the submicrometer grating, and (c) the OM image of the cross-sectional profile of the lens array.

Fig. 13.
Fig. 13.

Schematic diagram for the proposed approach to estimate the equivalent average pitch of grating.

Fig. 14.
Fig. 14.

Experimental setup for optical measurement.

Fig. 15.
Fig. 15.

Top view of the color separation system with collimated LEDs.

Fig. 16.
Fig. 16.

(a) Sequential light pattern of the tested module. (b) CIE chromaticity diagram of the tested module.

Fig. 17.
Fig. 17.

Cross sections of normalized intensity generated by the proposed module.

Tables (3)

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Table 1. Results of Measuring Grating Pitches

Tables Icon

Table 2. CIE xy Coordinates of Test Results

Tables Icon

Table 3. Comparison of the Module Between the B-G-R-G and R-G-B-G Patterns

Equations (5)

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θ1=θ1d=cos11+1+8nL24nL,
θ2d=90°2θ1d,
θinc=θ1d+θ2d,
mλ=Λ(n0sinθdifnLsinθinc),
f=Psubtan(ϕ),

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