18-1: Invited Paper : Ultra-High-Brightness 2K x 2K Full-Color OLED Microdisplay Using Direct Patterning of OLED Emitters

2017 ◽  
Vol 48 (1) ◽  
pp. 226-229 ◽  
Author(s):  
Amalkumar Ghosh ◽  
Evan P. Donoghue ◽  
Ilyas Khayrullin ◽  
Tariq Ali ◽  
lhor Wacyk ◽  
...  
Keyword(s):  
High Brightness ◽  
Full Color ◽  
Direct Patterning

scholarly journals Enlarging the Eyebox of Maxwellian Displays with a Customized Liquid Crystal Dammann Grating

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 195
Author(s):  
Ziqian He ◽  
Kun Yin ◽  
Kuan-Hsu Fan-Chiang ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystal ◽  
Optical System ◽  
Proof Of Concept ◽  
System Configuration ◽  
Distributed Energy ◽  
Good Efficiency ◽  
High Brightness ◽  
Full Color ◽  
Crystal Polymer ◽  
Maxwellian View

The Maxwellian view offers a promising approach to overcome the vergence-accommodation conflict in near-eye displays, however, its pinhole-like imaging naturally limits the eyebox size. Here, a liquid crystal polymer-based Dammann grating with evenly distributed energy among different diffraction orders is developed to enlarge the eyebox of Maxwellian view displays via pupil replication. In the experiment, a 3-by-3 Dammann grating is designed and fabricated, which exhibits good efficiency and high brightness uniformity. We further construct a proof-of-concept Maxwellian view display breadboard by inserting the Dammann grating into the optical system. The prototype successfully demonstrates the enlarged eyebox and full-color operation. Our work provides a promising route of eyebox expansion in Maxwellian view displays while maintaining full-color operation, simple system configuration, compactness, and lightweight.

Inkjet Printing of Light-Emitting Polymer Displays

MRS Bulletin ◽  
2003 ◽  
Vol 28 (11) ◽  
pp. 821-827 ◽  
Author(s):  
Tatsuya Shimoda ◽  
Katsuyuki Morii ◽  
Shunichi Seki ◽  
Hiroshi Kiguchi
Keyword(s):  
Inkjet Printing ◽  
Color Image ◽  
Drying Process ◽  
Film Properties ◽  
Light Emitting ◽  
Thickness Profile ◽  
Full Color ◽  
Direct Patterning ◽  
Organic Electroluminescent ◽  
Color Pixel

AbstractBased on the concept of a microliquid process, we have developed an organic electroluminescent display using conductive polymers, including light-emitting polymers. The technology of inkjet printing has progressed enough to be used for the microliquid process. First, we describe the process used to form a patterned thin film. This involves inkjet-related technologies, the self-patterning behavior of a microliquid on the substrate, and the drying process that defines the thickness profile and film properties. Some microliquid behaviors and related phenomena, along with properties of the resulting film, were identified as distinct from those coming from a macroscopic liquid, as a result of size effects. By fully utilizing these unique properties of microliquids, we have succeeded in fabricating color-pixel arrays by direct patterning of polymer solutions. As a result, an organic electroluminescent display with a vivid full-color image has been developed.

Full-color Thin Film ZnGa2O4 Phosphors by Ion Implantation

1997 ◽  
Vol 471 ◽  
Author(s):  
N. M. Kalkhoran ◽  
D. A. Trivedi ◽  
W. D. Halverson ◽  
S. M. Vernon
Keyword(s):  
Thin Film ◽  
Ion Implantation ◽  
Surface Texturing ◽  
Rf Sputtering ◽  
High Brightness ◽  
Full Color ◽  
Luminescence Efficiency ◽  
Cie Chromaticity ◽  
Bright Luminescence ◽  
Ion Implanted

ABSTRACTFull-color cathodoluminescence (CL) characteristics of ion implanted ZnGa2O4 thin film phosphors deposited by rf sputtering have been investigated. High brightness red (R) and green (G) CL was obtained from Eu and Mn-implanted ions, respectively. Blue (B) emission has been achieved by Ce ion implantation or from high temperature annealed, self-activated films. RGB emissions of ion implanted ZnGa2O4 thin film phosphors are well saturated and enclose a larger area surrounding the central “white” zone of CIE chromaticity chart than standard CRT phosphors. Luminescence efficiency enhancements of up to 40% have been achieved through surface texturing of the substrate prior to phosphor deposition. First demonstration of bright luminescence in ion implanted ZnGa2O4 films on flexible polyimide substrates is reported.

scholarly journals High Brightness Full Color LEDs.

1999 ◽  
Vol 23 (2) ◽  
pp. 49-52
Author(s):  
Yoshinobu SUEHIRO ◽  
Takashi SATO ◽  
Koji UCHIDA ◽  
Shigeru YAMAZAKI
Keyword(s):  
High Brightness ◽  
Full Color

scholarly journals High-brightness SiC blue LEDs and their application to full-color LED lamps.

1990 ◽  
Vol 44 (5) ◽  
pp. 585-590
Author(s):  
Yasuhiko Matsushita ◽  
Toshitake Nakata ◽  
Yasuhiro Ueda ◽  
Takahiro Uetani ◽  
Yoshiharu Fujikawa ◽  
...  
Keyword(s):  
High Brightness ◽  
Full Color

A Stable Field Emission Electron Source

1977 ◽  
Vol 35 ◽  
pp. 58-59
Author(s):  
W.R. Bottoms ◽  
G.B. Haydon
Keyword(s):  
Field Emission ◽  
Signal To Noise Ratio ◽  
High Brightness ◽  
Electron Sources ◽  
Brightness Field ◽  
Current Densities ◽  
Properties Of Materials ◽  
Stable Field ◽  
Stable Current ◽  
Careful Design

There is great interest in improving the brightness of electron sources and therefore the ability of electron optical instrumentation to probe the properties of materials. Extensive work by Dr. Crew and others has provided extremely high brightness sources for certain kinds of analytical problems but which pose serious difficulties in other problems. These sources cannot survive in conventional system vacuums. If one wishes to gather information from the other signal channels activated by electron beam bombardment it is necessary to provide sufficient current to allow an acceptable signal-to-noise ratio. It is possible through careful design to provide a high brightness field emission source which has the capability of providing high currents as well as high current densities to a specimen. In this paper we describe an electrode to provide long-lived stable current in field emission sources.The source geometry was based upon the results of extensive computer modeling. The design attempted to maximize the total current available at a specimen.

Optical Properties of HVEM Accelerators

1975 ◽  
Vol 33 ◽  
pp. 180-181
Author(s):  
A. Strojnik ◽  
J.W. Scholl ◽  
V. Bevc
Keyword(s):  
Optical Properties ◽  
Electron Accelerator ◽  
Systematic Investigation ◽  
Electron Source ◽  
High Brightness ◽  
The Past ◽  
Wide Range ◽  
Optical Behavior

The electron accelerator, as inserted between the electron source (injector) and the imaging column of the HVEM, is usually a strong lens and should be optimized in order to ensure high brightness over a wide range of accelerating voltages and illuminating conditions. This is especially true in the case of the STEM where the brightness directly determines the highest resolution attainable. In the past, the optical behavior of accelerators was usually determined for a particular configuration. During the development of the accelerator for the Arizona 1 MEV STEM, systematic investigation was made of the major optical properties for a variety of electrode configurations, number of stages N, accelerating voltages, 1 and 10 MEV, and a range of injection voltages ϕ0 = 1, 3, 10, 30, 100, 300 kV).

Characteristics and Application of Temperature-Field Emitters

1975 ◽  
Vol 33 ◽  
pp. 144-145
Author(s):  
N. Tamura ◽  
T. Goto ◽  
Y. Harada
Keyword(s):  
Temperature Field ◽  
Electron Microscope ◽  
Field Emission ◽  
Resolving Power ◽  
High Brightness ◽  
Field Emitters ◽  
Emission Electron ◽  
Sufficient Stability ◽  
Scanning Electron ◽  
Illuminating System

On account of its high brightness, the field emission electron source has the advantage that it provides the conventional electron microscope with highly coherent illuminating system and that it directly improves the, resolving power of the scanning electron microscope. The present authors have reported some results obtained with a 100 kV field emission electron microscope.It has been proven, furthermore, that the tungsten emitter as a temperature field emission source can be utilized with a sufficient stability under a modest vacuum of 10-8 ~ 10-9 Torr. The present paper is concerned with an extension of our study on the characteristics of the temperature field emitters.

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