Optimal liquid crystal display backlight dimming based on clustered contrast loss

Jae Woo Kim, Kyu Ho Lee, Jin Gon Bae, Hyung Geun Kim, Jong Ok Kim

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We propose an image adaptive backlight dimming method that quantitatively measures the perceived image quality degradation in terms of brightness and contrast. Unlike conventional methods, the proposed adaptive dimming considers the spatial distribution characteristics of the clipped pixels via a new measure, clusterization, to effectively estimate the perceived contrast loss and prevent the clipping artifact (light saturation). The proposed adaptive dimming achieves an average 17.71% power reduction while keeping the image quality difference to a tolerably low amount, as shown by the subjective mean opinion score test results. Comparing the optimal backlight levels estimated by the proposed method with results from other methods, the proposed backlight dimming is closer to the ground truth backlight levels that are favored by human subjects.

Original languageEnglish
Article number103112
JournalOptical Engineering
Issue number10
Publication statusPublished - 2015 Oct 1

Bibliographical note

Publisher Copyright:
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE).


  • backlight modulation
  • clustered contrast loss
  • global dimming
  • liquid crystal display
  • quality-power optimization

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)


Dive into the research topics of 'Optimal liquid crystal display backlight dimming based on clustered contrast loss'. Together they form a unique fingerprint.

Cite this