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Journal of Digital Imaging

, Volume 19, Issue 3, pp 240–248 | Cite as

Visual Assessment of Angular Response in Medical Liquid Crystal Displays

  • Aldo BadanoEmail author
  • Sarah Schneider
  • Ehsan Samei
Article

In spite of having non-Lambertian emission, displays based on liquid crystal technology are becoming popular for medical diagnostic work stations. For all liquid crystal displays (LCDs), the contrast performance varies with viewing direction. Accurate measurements of the angular distribution of light emission require expensive instrumentation and extensive expertise. We investigated the possibility of using a test pattern to visually assess the angular response performance of LCDs. We found that this procedure offers the end user of displays a simple, fast, and relatively consistent technique to verify that the viewing angle performance of the display device is within certain acceptable limits.

Key Words

Viewing angle angular contrast goniometric measurements AMLCD medical display visual threshold 

Notes

Acknowledgments

The authors acknowledge equipment loans from Barco NV (Belgium), Philips/FIMI (Saronno, Italy), and National Display Systems (Morgan Hill, CA, USA).

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Copyright information

© SCAR (Society for Computer Applications in Radiology) 2006

Authors and Affiliations

  1. 1.Center for Devices and Radiological HealthU.S. Food and Drug AdministrationRockvilleUSA
  2. 2.Duke Advanced Imaging Laboratories, Departments of Radiology, Physics, and Biomedical EngineeringDuke University and Duke University Medical CenterDurhamUSA

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