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3.0磁性矩阵显示

2018-3-23 10:05| 发布者: dymodel| 查看: 854| 评论: 0|原作者: monkey

摘要: 3.0 Magnetic Matrix Display 3.1 Introduction In 1995, work by Knox and Beeteson led to the idea of utilising the effect of a magnetic field on the trajectory of electrons and to propose a new method ...
3.0 Magnetic Matrix Display
3.1 Introduction
In 1995, work by Knox and Beeteson led to the idea of utilising the effect of a magnetic field on the trajectory of electrons and to propose a new method of constructing a thin CRT[106]. The initial findings of the work were first published[105] and reviewed in
1997[128]. The basic concept used a large, thin, permanent magnet with a hole drilled through it at each pixel location and which was contained within the vacuum envelope of the display. Electrostatic fields were used to modulate and accelerate the electron beams in a manner similar to a conventional CRT, but with the mechanically complex gun assembly replaced by magnetic collimation of the electron beam during the critical early acceleration phase. The device was called the Magnetic Matrix Display (MMD).
It was recognised at a very early stage that construction of a prototype of the display presented some unique challenges, particularly with regard to the magnet assembly. For this reason it was decided that initial investigations would be undertaken using electromagnetic simulation tools, to be followed by a proof of concept once the required conditions for operation had been established. The aim of the analysis was to determine the balance between the magnetic and electric field strengths needed to obtain the desired operation and to check these were compatible with the properties of available materials.
In this chapter the simulation tools used to investigate the characteristics of the display and the additional software that was written in order to facilitate such large-scale simulation work are described in detail. Also described are the computer hardware used to
execute the simulations and the specific requirements such simulations impose on the hardware configuration. The intended physical and operational properties of the display are briefly reviewed before applying the simulation tools to obtain quantitative results that
validate the theoretical design. Finally, the electro-optical distortions that are a function of the display structure and which are calculated by the simulation tools are qualitatively discussed.


文件名:  3.0磁性矩阵显示.pdf


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