Display Standard - Veritas et Visus

More documents

Recommendations

Info

Veritas et Visus Display Standard February 2009 New features for the characterization of LCD using multispectral EZContrastMS system are presented. In addition to providing most efficient data in terms of luminance and color, precise analysis of the display performance can be made versus wavelength and gray levels. The capacity to analyze the polarization state of the light is also extremely helpful to understand the LCD behavior. If we remove the top LCD polarizer the rotation of the liquid crystal cell versus all parameters can be measured (angles, gray level, and wavelength). It is possible then to evaluate the best top waveplate and polarizer to optimize the performances of the display. Polarization gray level analysis can help to optimize the liquid crystal cell and its components. References 1 G. Sharma, “Digital color imaging handbook”, Published by CRC Press, ISBN 084930900X (2003). 2 R.S. Berns, F.H. Imai, P.D. Burns, D.Y. Tzeng, “Multi-spectral based color reproduction research at the Munsell color science laboratory”, Proceedings SPIE 3409 (1998). 3 H. Hsu, Y. Lan, C. Lai, “Luminance and color measurements for LED backlights with a hyperspectral camera”, P- 84, 1503, SID proceedings (2008) 4 P. Boher, T. Leroux, T. Bignon, D. Glinel, “New multispectral Fourier optics viewing angle instrument for full characterization of LCDs and their components”, P-89, SID conf. (2008) 5 P. Boher, T. Bignon, T. Leroux, “Angle of View Polarization Characterization of Liquid Crystal Displays and Their Components”, Journal of Information Display, vol. 8, N°4 (2007) 6 J. Hirata, Y. Hisatake, M. Ishikawa, “Viewing angle evaluation method for LCDs with gray scale images”, J. of SID, ¼, 405 (1993) 7 S.T. Tang, H.S. Kwok, “3x3 matrix for unitary optical systems”, J. Opt. Soc. Am., A, vol. 18, N°9, 2138 (2001) >>>>>>>>>>>>>>>>>>>>
Veritas et Visus Display Standard February 2009 Background Information for the LCD Shoot-Out Comparison of Top-of-the-Line Flagship Models from Samsung, Sharp and Sony and Mid-Line models from LG, Samsung and Sony 63 by Raymond Soneira Dr. Raymond Soneira is the founder, president and CEO of DisplayMate Technologies Corporation. He has a Ph.D. in Physics from Princeton University, where he spent five years as a long-term member of the Institute for Advanced Study. He has authored more than 35 research articles in scientific journals on physics and computer science. Backgrounder Introduction: This Report includes background information and summarizes the conclusions of the LCD Shoot-Out. The LCD Shoot-Out was jointly produced by DisplayMate Technologies and Insight Media. The technical analysis was performed by Dr. Raymond Soneira, President of DisplayMate Technologies. http:www.displaymate.com, http://www.insightmedia.info This report details the benchmark testing that was done on a number of top and middle-of-the line LCD HDTVs. These TVs were arranged side-by-side in a shoot-out configuration and compared to each other and to reference PDP and CRT monitors. The report summarizes the main shoot-out results and includes many photos, tables, graphs and figures to aid in understanding how the tests were done, why they were done and the significance of the results. While on-axis performance is quite good in these LCD TVs, at off angles the color shifts are noticeable and potentially a serious problem. Worse, TVs with native extended color gamuts produced significantly larger color errors at off angles. Many in the industry will find the off-axis results not unexpected, but the level of color inaccuracy and the enhanced effect with wide color gamut displays, was a surprise to us and to everyone that came by to observe the test results. Understanding these effects can help system integrators and OEMs select the best LCD for their applications, and LCD manufacturers to do a better job with the next generation products. The figure below shows a panoramic photograph of the shoot-out with the lights turned on. All of the measurements and viewing tests were done in the dark for maximum picture quality and accuracy. Panoramic photograph of the shoot-out with the lights on Photograph by Dieter Michel, PROSOUND and Medientechnik & Systemintegration Magazines, Germany; http://www.displaymate.com/shootout_panorama_large_4000.jpg HDTV displays in the shoot-out: From right to left in the above panoramic photograph: 1. Sharp – Flagship Top-of-the-Line LC-52D92U; 120 Hz Refresh Rate with Standard Color Gamut 2. Samsung – Flagship Top-of-the-Line LN-T5281F; 60 Hz Refresh Rate with Extended Color Gamut; LED backlight is strobed to minimize motion blur 3. Reference Plasma Display – Panasonic Professional Plasma
Page 1 and 2:
Display Standard Veritas et Visus F
Page 3 and 4:
Veritas et Visus Display Standard F
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12: Veritas et Visus Display Standard F
Page 61: Veritas et Visus Display Standard F
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
show all

Display Standard - Veritas et Visus

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?