Wyniki wyszukiwania - BazTech

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Historia badań ciekłych kryształów

Raszewski Zbigniew, Zieliński Jerzy, Kłosowicz Stanisław

Biuletyn Wojskowej Akademii Technicznej

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2022

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Vol. 71, nr 1

65--81

PL

Przedstawiono rys historyczny badań nad ciekłymi kryształami z uwzględnieniem zastosowań tych substancji. szczególną uwagę poświęcono badaniom prowadzonym w polskich ośrodkach naukowych od lat trzydziestych ubiegłego wieku do dziś.

EN

A historical view of studies on liquid crystals is presented. application of those materials are also taken into account. special attention is paid to the studies conducted at Polish scientific centres since the thirties of the last century till now.

2

Glass cockpits : advantages and problems

Kłosowicz S. J., Zieliński J., Parka J., Olifierczuk M.

Biuletyn Wojskowej Akademii Technicznej

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2009

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Vol. 58, nr 1

69-85

EN

New trends of construction of information displays used in cockpits of different modern aircrafts are presented. The main attention is paid to the liquid crystal displays as the most commonly used nowadays and still of interest in the future. Other technologies of flat information panels interesting for the future applications are discussed. The results of theoretical works performed at the Institute of Applied Physics MUT and an example of integrated display for gliders designed there are also given.

PL

Przedstawiono nowe kierunki konstrukcji wyświetlaczy informacyjnych do kokpitów współczesnych samolotów. Główny nacisk położono na wyświetlacze ciekłokrystaliczne jako najbardziej obecnie rozpowszechnione i perspektywiczne. Przedyskutowano inne technologie płaskich ekranów, interesujące z punktu widzenia przyszłych zastosowań. Przedstawiono również wyniki prac teoretycznych oraz przykład zintegrowanego wyświetlacza dla szybowca skonstruowanego w Instytucie Fizyki Technicznej WAT.

3

Mathematical model of light propagation through liquid crystal display working under real conditions

Olifierczuk M.

Opto-Electronics Review

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2008

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Vol. 16, No. 3

287-296

EN

The main aim of our work is to present a theory of light propagation through a liquid crystal display worked out in our University. This theory takes into account real conditions of a display operation such as temporal coherence of light source, interference phenomena, spectral characteristics of refractive coefficients of individual layers and their complex forms, real directions of ordinary and extraordinary wavevectors into each layer, real directions of light polarization into anisotropic or dichroic layers etc. Therefore, our theory can be used to determine optical parameters of a liquid crystal display operating under real or at least quasi-real conditions. Contrary to other theories (e.g., Beremann or geometric optics approximation), this model is characterized by a small number of simplifications. Thus, it can be used to analyse a display operating in special conditions, such as military or out-door applications. In these cases, very high optical parameters (luminance and contrast ratio) are needed. Application of even small simplifications conducts to significant changes of calculated parameters.

4

Liquid crystal display unit for reconfigurable instrument for automotive applications

Knoll P. M., Kosmowski B. B.

Opto-Electronics Review

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2002

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Vol. 10, No. 1

75-78

EN

Nowadays, the car drivers are faced with a rapidly increasing flood of information. In addition to established information systems (car radio, vehicle monitoring, mobile phones), high class vehicles feature navigation systems almost as standard. In the current decade, driver assistance and collision avoidance systems will appear in vehicles. Hence, there is an increasing demand for supplying the driver with more information that helps him to drive safer and more economical. The price decline in the computer market and the availability of powerful graphic hardware and software concepts make it possible to enhance the classical functions of the instrument board to an interactive multifunctional information panel-an interface between information systems of the car and the driver. Therefore, the question of additional visual and cognitive stress, and a possible distraction of the driver by the large amount of information, and its complexity becomes predominant. Reconfigurable instruments, based on a microprocessor controlled active matrix colour display, provide a powerful alternative to the usual mechanical / electromechanical instrument clusters in vehicles. They will help to strengthen passive safety, they adapt to user and situation requirements, and they are easy to install, to configure, and to maintain. Reconfigurable instruments in future cars will have a high impact on traffic since they can provide the driver with much more information, presenting it in a way that is flexibly matched to the importance of particular data and to the ergonomic properties of the driver. The functions are manifold and span from classical driver information like speed to navigation prompts and ultimately to video and multimedia acces.