Effect of ambient illumination on legibility of displays of liquid-crystals and light-emitting diodes

1974 ◽  
Author(s):  
Jerry Duncan ◽  
Stephan Konz
Keyword(s):  
Liquid Crystals ◽  
Light Emitting Diodes ◽  
Ambient Illumination ◽  
Light Emitting

scholarly journals Displays

1983 ◽  
Vol 10 (2-3) ◽  
pp. 71-80
Author(s):  
A. Schauer
Keyword(s):  
Liquid Crystals ◽  
Thick Film ◽  
Light Emitting Diodes ◽  
Short Review ◽  
Performance Data ◽  
Light Emitting ◽  
Hybrid Techniques ◽  
Future Developments ◽  
Different Types

A short review is given on new display technologies such as plasma, liquid crystals, light emitting diodes, electroluminescence and electrochromism. It is stated that thin or thick film or hybrid techniques are essential for all the different types of display. Comparing the performance data of displays the advantages, disadvantages, appropriate applications and future developments are described. Finally the display market and its growth are discussed briefly.

Room temperature perylene based columnar liquid crystals as solid-state fluorescent emitters in solution-processable organic light-emitting diodes

2020 ◽  
Vol 8 (36) ◽  
pp. 12485-12494 ◽  
Author(s):  
Indu Bala ◽  
Nitya Singh ◽  
Rohit Ashok Kumar Yadav ◽  
Joydip De ◽  
Santosh Prasad Gupta ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Solid State ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Room Temperature ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

Perylene tetraesters based columnar liquid crystal employed as solid-state fluorescent emitter in solution-processed OLEDs and enables to achieve maximum external quantum efficiency of 6.5%.

Reversible Tuning of Lasing in Cholesteric Liquid Crystals Controlled by Light-Emitting Diodes

2007 ◽  
Vol 19 (4) ◽  
pp. 565-568 ◽  
Author(s):  
G. Chilaya ◽  
A. Chanishvili ◽  
G. Petriashvili ◽  
R. Barberi ◽  
R. Bartolino ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Light Emitting Diodes ◽  
Cholesteric Liquid Crystals ◽  
Light Emitting

Side-Chain Polymer Liquid Crystals Containing Oxadiazole and Amine Moieties with Carrier-Transporting Abilities for Single-Layer Light-Emitting Diodes

2003 ◽  
Vol 107 (21) ◽  
pp. 4887-4893 ◽  
Author(s):  
Masuki Kawamoto ◽  
Hiroyuki Mochizuki ◽  
Atsushi Shishido ◽  
Osamu Tsutsumi ◽  
Tomiki Ikeda ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Light Emitting Diodes ◽  
Single Layer ◽  
Side Chain ◽  
Chain Polymer ◽  
Light Emitting ◽  
Polymer Liquid ◽  
Polymer Liquid Crystals

scholarly journals Semiconductor Materials for Fabrication of Multi-Color Organic Light-Emitting Diodes (OLEDs)

2021 ◽  
Vol 40 (4) ◽  
pp. 874-882
Author(s):  
Aftab Ahmad ◽  
Nasif Raza Jaffri ◽  
Usama Abrar
Keyword(s):  
Liquid Crystals ◽  
Electronic Properties ◽  
Density Functional ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Dft Methods ◽  
Electronic Density ◽  
Light Emitting ◽  
Organic Light ◽  
Mechanical Methods

This study aims to propose organic materials for the development of light-emitting semiconductor diodes for colored displays. Studies show that these materials are capable of creating a variety of different colors rather than white light. But of Organic Light-Emitting Diodes (OLEDs) are only used as a source of white back-light for OLED displays and liquid crystals are used for color generation. This work suggests that OLEDs can be used to make color displays on their own without the help of Liquid Crystals (LCs). Recently, organic devices are widely under discussion as are comparatively cheap, can be processed economically and effortlessly at ambient temperature besides their effortless handling. The calculation of the electronic properties of molecular species was achieved by the use of ab-initio quantum mechanical methods, i.e., Density Functional Theory (DFT). DFT methods are suited to calculate the electronics properties of the organic molecules, enabling the determination of band gaps and quantum efficiencies. DFT views electron stochastic nature and thus calculates the material’s solid-state properties. DFT calculations on isolated molecules were carried by the Gaussian software package to predict electronic properties. Pentacene is used as test molecule in this work. B3LYP functional use Kohn-Sham orbitals to predict the band energy values said material rather than LDA functional that depends on the value of electronic density at each point on the space. The substitution process was used to make changes in bandgaps; which affect shades of light emitted by OLEDs.

Let There Be Lights

2017 ◽  
Author(s):  
David Segal
Keyword(s):  
Quantum Dots ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Solid State ◽  
Light Emitting Diodes ◽  
Liquid Crystal Displays ◽  
Organic Light Emitting Diodes ◽  
Solid State Lighting ◽  
Light Emitting ◽  
Organic Light

Chapter 6 describes solid-state lighting. It covers electroluminescence light-emitting diodes, quantum dots, organic light-emitting diodes (OLEDs), liquid crystals and liquid crystal displays. The importance of synthesis of high purity semiconductors for lighting applications is stressed. Use of materials to produce clear white light is outlined. Association structures in solution such as micelles and liquid crystals are described.

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