Abstract

Locally dimmable backlight modules can effectively improve the dynamic range of liquid-crystal displays (LCDs) to human vision range. The resolution of addressable segments and the optical profile of these segments primarily determine the perceived image quality such as the contrast enhancement and boundary visibility. Contrast sensitivity function, the gradient of backlight image of $\pi/100$ of background luminance (units: nits/degree), was found as the threshold for the visibility of boundaries. Additionally, a study on a recommended profile with an economical number of segments was studied. Our results confirm that image qualities with this backlight modulation are improved in contrast enhancement and boundary perception using 2D-dimming backlight.

© 2008 IEEE

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  1. H. Seetzen, W. Heidrich, W. Stuerzlinger, G. Ward, L. Whitehead, M. Trentacoster, A. Ghosh, A. Vorozcovs, "High dynamic range display systems," SIGGRAPH'04, ACM Trans. Graphics 23, 760-768 (2004).
  2. Y.-W. Wang, "Point spread function in high dynamic range display system," TDC'06, 04-013 338-340 (2006).
  3. F.-C. Lin, C.-Y. Liao, Y.-P. Huang, H.-P. Shieh, "Inverse of mapping function (IMF) method for image-quality enhancement of high-dynamic-range LCD TVs," SID'07 39, (2007).
  4. Beyond Acuity: The Contrast Sensitivity Function, Nov. 27, 2007, [Online]. Available:http://www.psych.ndsu.nodak.edu/mccourt/Psy460/Spatial%20frequency%20analysis/Spatial%20frequency%20analysis.html .
  5. M. Fihn, "High-resolution displays: Path to what the eye demands," SID'06 Appl. Tutorial Notes 4, (2006).
  6. T.-L. Ji, M.-K. Sundareshan, H. Roehrig, "Adaptive image contrast enhancement based on human visual properties," IEEE Trans. Med. Imag. 13, 573-586 (1994).
  7. S. Swinkels, R. Muijs, "Effect of backlight complexity on perceived image quality HDR displays," IDW'06, VHF 3, (2006).

2007

F.-C. Lin, C.-Y. Liao, Y.-P. Huang, H.-P. Shieh, "Inverse of mapping function (IMF) method for image-quality enhancement of high-dynamic-range LCD TVs," SID'07 39, (2007).

2006

M. Fihn, "High-resolution displays: Path to what the eye demands," SID'06 Appl. Tutorial Notes 4, (2006).

Y.-W. Wang, "Point spread function in high dynamic range display system," TDC'06, 04-013 338-340 (2006).

S. Swinkels, R. Muijs, "Effect of backlight complexity on perceived image quality HDR displays," IDW'06, VHF 3, (2006).

2004

H. Seetzen, W. Heidrich, W. Stuerzlinger, G. Ward, L. Whitehead, M. Trentacoster, A. Ghosh, A. Vorozcovs, "High dynamic range display systems," SIGGRAPH'04, ACM Trans. Graphics 23, 760-768 (2004).

1994

T.-L. Ji, M.-K. Sundareshan, H. Roehrig, "Adaptive image contrast enhancement based on human visual properties," IEEE Trans. Med. Imag. 13, 573-586 (1994).

IDW'06, VHF

S. Swinkels, R. Muijs, "Effect of backlight complexity on perceived image quality HDR displays," IDW'06, VHF 3, (2006).

IEEE Trans. Med. Imag.

T.-L. Ji, M.-K. Sundareshan, H. Roehrig, "Adaptive image contrast enhancement based on human visual properties," IEEE Trans. Med. Imag. 13, 573-586 (1994).

SID'06 Appl. Tutorial Notes

M. Fihn, "High-resolution displays: Path to what the eye demands," SID'06 Appl. Tutorial Notes 4, (2006).

SID'07

F.-C. Lin, C.-Y. Liao, Y.-P. Huang, H.-P. Shieh, "Inverse of mapping function (IMF) method for image-quality enhancement of high-dynamic-range LCD TVs," SID'07 39, (2007).

SIGGRAPH'04, ACM Trans. Graphics

H. Seetzen, W. Heidrich, W. Stuerzlinger, G. Ward, L. Whitehead, M. Trentacoster, A. Ghosh, A. Vorozcovs, "High dynamic range display systems," SIGGRAPH'04, ACM Trans. Graphics 23, 760-768 (2004).

TDC'06, 04-013

Y.-W. Wang, "Point spread function in high dynamic range display system," TDC'06, 04-013 338-340 (2006).

Other

Beyond Acuity: The Contrast Sensitivity Function, Nov. 27, 2007, [Online]. Available:http://www.psych.ndsu.nodak.edu/mccourt/Psy460/Spatial%20frequency%20analysis/Spatial%20frequency%20analysis.html .

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