Coupled wave equations of two-photon-resonant image upconverter and their approximate solutions for plane wave pumping are derived from Maxwell's equations in spatial frequency domain. In the case of plane wave pumping, the image upconverter can be characterized by the extension of optical transfer function (OTF). If the media is thin enough, the OTF has the only phase factor from that the image formations are derived. But if it is thick, the phase mis-matching and the interaction strength affect the conversion efficiency and spatial frequency dependence of the efficiency.
This paper describes a new optical device, called "Relay-Lens Plate", which displaces a real image, displayed on the back surface of a thick glass plate, toward and beyond the front surface of the glass plate. This device has advantages of a small distortion for the image and a small thickness over an ordinary relay lens system, and also has advantages of a large area for the image and mechanical strength over a fiber plate. Experiments and design method of optical barriers, necessary to this device, are described and discussed.
The possibility of CAD in a gas-discharge panel for color TV display has been studied to obtain the most suitable discharge-cell conditions for VUV radiation, which excites the tri-color phosphors to be converted into visible emission. The cell-constituent items in this study are 20〜600 Torr at pressure of filling He-Xe mixture with any composition and 0.1〜1.0 mm in size. The theoretical model includes the expressions of Poisson's, lots-of-continuity, Boltzmann's, and Holstein's equations for possibly required species. Accordingly, We have searched necessary basic data and list them up.
A measurement equipment for getting characteristics of AC-PDP, in which driving pulse waveforms and voltages are controlled from a personal computer, has been made to realize quick and smooth experiment in numerous conditions. Using it, dynamic characterisatics of an ordinal monochrome AC-PDP and a surface dischage type of color AC-PDP have been measured and compared each other. A monochrome panel with Ne-Xe gas could not work on high rate access over 50 kHz, but a color one has sufficient quick response time to display TV pictures.
A large capacity, 704×1024 dots, thin-film electroluminescent (TFEL) display panel with a density of 4.2 lines/mm is fabricated by employing a stacked insulator structure. Improvement of the breakdown phenomenon, from a propagating to a self-healing mode, by interposing a self-healing type insulator between the metal electrode and the second Ta_2O_5 insulator is discussed in this paper. The charge versus applied voltage (Q-V) characteristic of the TFEL device is also reported.
A new aging sequence consisting of three steps was developed to minimize the diameter of pinhole failures and to reduce aging time. 1) Point defects are eliminated by discharge line by line, appling relative low-power pulse voltage (around threshold voltage, 20μs). 2) The power consumption of EL panel is minimized. Most of the point defects are eliminated by these two steps. 3) The initial shift of Brightness-Voltage relationship is stabilized in an accelated condition. As a result, a 640×400 pixel EL panel was obtained.
Superiority of the black foreground white background (B/W) mode in a reflective multiplexed TN-LCD in the legibility compared with the inverted mode (W/B) is explained analitically by considering the surface reflection effect.
An overhead projection system consisting of a 640×400 pixel active matrix LCD using an automatic defect tolerance and a transparent digitizer has been developed. This system is capable of projecting moving pictures vividly because of the LCD's high contrast ration and fast response time. This combination of an LCD and digitizer makes manipulation of on-screen images easy and speeds up image searching.