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Longmont, CO, United States

Penczek J.,University of Colorado at Boulder | Penczek J.,U.S. National Institute of Standards and Technology | Kelley E.F.,KELTEK LLC | Boynton P.A.,U.S. National Institute of Standards and Technology
Digest of Technical Papers - SID International Symposium | Year: 2015

A set of optical transmission measurements are put forth which can be used to determine the optical performance of transparent displays under arbitrary ambient lighting environments. The methodology measures the transmission coefficients in order to determine the on-screen photometric and colorimetric characteristics of transmissive, emissive, and reflective displays. An LCD transparent display is used as an example to demonstrate these methods. © 2015 SID.


Kelley E.F.,KELTEK LLC
Proceedings of International Meeting on Information Display | Year: 2010

The new measurement standard document from the International Committee for Display Metrology (ICDM) sponsored by the Society for Information Display (SID) is a considerable expansion of the FPDM2 document from VESA (Video Electronics Standards Association). Major new chapters are 3D-stereo, motion, gray and color scales, and projection metrics. Concerns for reasonable contrast metrics and more than three primaries are discussed. We review the philosophy, the structure, content, and possible future directions of the ICDM effort.


Kelley E.F.,KELTEK LLC
Information Display | Year: 2013

One of the creators of the IDMS (Information Display Measurements Standard) takes the measure of the very latest large, curved OLED TVs. In this first article in a series, he looks at color performance. © SID 2013.


Kelley E.F.,KELTEK LLC
Digest of Technical Papers - SID International Symposium | Year: 2011

The International Committee for Display Metrology of the Society for Information Display is releasing the Information Display Measurements Standard (IDMS) to assist industry in dealing with display metrology issues. We review the history of the document, its philosophy, its structure, and new content. © 2011 SID.


Kelley E.F.,KELTEK LLC
Information Display | Year: 2011

There are presently two main competing commercial liquid-crystal-display (LCD) stereoscopic technologies for home television that requires the use of glasses: temporally multiplexed (TM) displays that use active glasses and spatially multiplexed displays that are often called patterned-retarder (PR) displays that use passive glasses. The active glasses are synchronized with the left-eye/right-eye sequence as each eye's information is displayed in TM display. In the PR displays, each horizontal line has the opposite circular polarization, and the passive glasses have a left-circular polarized filter for the left eye and a right- circular polarized filter for the right eye. In attempting a comparison of different technologies, it is important to remember that display settings can affect measured and perceived resolution. Differences in the appearance of images rendered by the PR and TM displays such as the presence of larger black gaps between the horizontal lines of the PR display may be attributed to differences in the pixel layouts between the displays that result in different fill factors.

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