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Measuring of the Basic Parameters of LCD Displays

Barczyk R., Kabzinski B., Jasinska-Choromanska D., Stienss A.

Journal of Automation Mobile Robotics and Intelligent Systems

2012

Vol. 6, No. 1

46-48

This article is about realization of the laboratory stand used for measuring parameters of LCD displays. The stand together with additional accessories (spectrophotometer and measuring probes) as well as software allow to measure a wide range of parameters (colour gamut, response time, contrast coefficient and its irregularity, luminance of black colour and its irregularity, luminance of white colour and its irregularity, changes of luminance depending on the viewing angle). This paper also show method and results of measurements of differences in contrast ratio and luminance uniformity between particular pieces of the same model of a display screen (research has been carried out on 5 pieces of the same model of a display). The presented results show that the measured value of the viewing angle may significantly differ from the value provided by producers of displays.

Tidal Level Predictions in Reference to Their Datum, Based on Particular, Selective Sources

Kabzinski B.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2008

Vol. 2, no. 2

149--154

The article presents differences between tidal datum of predictions taken from six official data sources (British, American and Caribbean comprising both paper and electronic form) for three pairs of ports located on the Atlantic coast of North, Central and South America. Two day of predictions represent spring and neap tide. It can be treated as a continuation, a deeper stage of works focused on tidal comparisons. The most essential trial of tidal datum unification for particular ports gives the more adequate base for comparison of Height Deviations from reference values (for particular ports: local or mean) and shows wide variety of the results.