Spelling suggestions: "subject:"display systems"" "subject:"isplay systems""
201 |
Modeling phosphor space charge in alternating-current thin-film electroluminescent devicesKeir, Paul D. 11 August 1995 (has links)
The accomplishments presented in this thesis are the development of three models
for simulation of space charge generation in the phosphor layer of alternating current
thin-film electroluminescent (ACTFEL) devices and the results from simulation
of these models. First, a single sheet charge model is developed and simulated.
The single sheet charge model is a model that simplifies the problem of modeling an
arbitrary distribution of space charge across the phosphor layer by lumping all of the
space charge into a sheet of charge at a specified location in the phosphor layer. In
this model and all subsequent models, space charge creation is assumed to occur by
field emission from bulk traps or by impact ionization of deep-level traps. A fairly
exhaustive parametric variation study of the single sheet charge model is performed
and the results are presented and discussed. The results show space charge effects
that are quite dependent on several parameters such as the number of bulk traps in
the phosphor layer, the location of the sheet of charge, the capture efficiency for space
charge annihilation, and the characteristic field for impact ionization of the deep-level
traps. The second model considered is a logical extension of the single sheet charge
model, the two sheet charge model, which models the space charge distribution as
two sheets of charge rather than one. This model has potential application in the
simulation of ACTFEL devices which exhibit large and/or symmetrical space charge
effects. The final model developed is an equivalent circuit/SPICE model of the single
sheet charge model. Actually, two models are developed, one for space charge
creation by field emission and one for impact ionization of deep-levels. Two SPICE
models are required because of functional differences in the dependencies of space
charge creation. The results of a simulation showing overshoot generated by SPICE
are given for the field emission equivalent circuit. / Graduation date: 1996
|
202 |
Data Density and Trend Reversals in Auditory Graphs: Effects on Point Estimation and Trend Identification TasksNees, Michael A. 28 February 2007 (has links)
Auditory graphsdisplays that represent graphical, quantitative information with soundhave the potential to make graphical representations of data more accessible to blind students and researchers as well as sighted people. No research to date, however, has systematically addressed the attributes of data that contribute to the complexity (the ease or difficulty of comprehension) of auditory graphs. A pair of studies examined the role of both data density (i.e., the number of discrete data points presented per second) and the number of trend reversals for both point estimation and trend identification tasks with auditory graphs. For the point estimation task, results showed main effects of both variables, with a larger effect attributable to performance decrements for graphs with more trend reversals. For the trend identification task, a large main effect was again observed for trend reversals, but an interaction suggested that the effect of the number of trend reversals was different across lower data densities (i.e., as density increased from 1 to 2 data points per second). Results are discussed in terms of data sonification applications and rhythmic theories of auditory pattern perception.
|
203 |
Virtual Rear Projection: Improving the User Experience with Multiple Redundant ProjectorsSummet, Jay W. 22 August 2007 (has links)
Front projection is an economical method to produce large displays. However, the twin problems of occlusions, which create shadows on the screen, and light projected onto users near the screen, potentially blinding them, makes front projection a poor fit for large upright interactive surfaces. Virtual Rear Projection (VRP) uses multiple redundant front projectors to provide the user experience of using a rear projected display. By using a projector-camera system to mitigate shadows and blinding light, a virtual rear projected display significantly improves upon the user experience of a traditional front projected display, allowing it to replace a rear projected display.
In this thesis we characterize the problems caused by shadows and occlusions and develop projection technologies that mitigate shadows and blinding light. We also present a laboratory performance evaluation, and a user evaluation of the technology showing that VRP improves the user experience with respect to traditional front projection.
|
204 |
Power supply noise analysis for 3D ICs using through-silicon-viasSane, Hemant 13 January 2010 (has links)
3D design is being recognized widely as the next BIG thing in system integration. However, design and analysis tools for 3D are still in infancy stage. Power supply noise analysis is one of the critical aspects of a design. Hence, the area of noise analysis for 3D designs is a key area for future development. The following research presents a new parasitic RLC modeling technique for 3D chips containing TSVs as well as a novel optimization algorithm for power-ground network of a 3D chip with the aim of minimizing noise in the network. The following work also looks into an existing commercial IR drop analysis tool and presents a way to modify it with the aim of handling 3D designs containing TSVs.
|
205 |
Effects of retinal disparity depth cues on cognitive workload in 3-D displays /Gooding, Linda Wells, January 1991 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1991. / Vita. Abstract. Includes bibliographical references (leaves 174-179). Also available via the Internet
|
206 |
Advanced wavelet image and video coding strategies for multimedia communicationsVass, Jozsef January 2000 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references (leaves 202-221). Also available on the Internet.
|
207 |
Automatic visual display design and creation /Salisbury, Leslie Denise Pinnel, January 2001 (has links)
Thesis (Ph. D.)--University of Washington, 2001. / Vita. Includes bibliographical references (p. 155-162).
|
208 |
A 2D visual language for rapid 3D scene design : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in the University of Canterbury /Adams, Nathan January 2009 (has links)
Thesis (M. Sc.)--University of Canterbury, 2009. / Typescript (photocopy). Includes bibliographical references (leaves 82-93). Also available via the World Wide Web.
|
209 |
Enhancing 3D models with urban information : a case study involving local authorities and property professionals in New Zealand : quantifying the benefit of 3D over alternative 2D systems : a thesis submitted to the Victoria University of Wellington in fulfilment of the requirements for the degree of Master of Building Science /Ryan, Rachel Anne. January 2007 (has links)
Thesis (M.B.Sc.)--Victoria University of Wellington, 2007. / Includes bibliographical references.
|
210 |
Exploring and visualizing the impact of multiple shared displays on collocated meeting practicesPlaue, Christopher M. January 2009 (has links)
Thesis (Ph.D)--Computing, Georgia Institute of Technology, 2009. / Committee Chair: Stasko, John; Committee Member: Bartram, Lyn; Committee Member: Catrambone, Richard; Committee Member: Guzdial, Mark; Committee Member: Mynatt, Elizabeth. Part of the SMARTech Electronic Thesis and Dissertation Collection.
|
Page generated in 0.0386 seconds