TY - JOUR
T1 - Electron-optics of the Fast Intelligent Tracking (F!T) tube: A CRT without a shadow mask
AU - Krijn, M.P.C.M.
AU - IJzerman, W.L.
AU - Brink, van den, H.B.
AU - Willemsen, O.H.
AU - Vissenberg, M.C.J.M.
PY - 2003
Y1 - 2003
N2 - In this paper, we describe the electron-optics involved in realizing a maskless CRT based on tracking the electron beams along horizontally aligned phosphor lines. We discuss the boundary conditions in order for the system to function. Emphasis is placed on the requirements of color purity, beam current, and spot size. A dedicated electron gun has been designed and tested. Results indicate that the spot-size requirements for the feasibility of the concept can be met. The depth of focus, in terms of the allowed mismatch of the dynamic focusing voltage, is small. Inter-beam space-charge repulsion turns out to be unproblematic. The cathode drive is shown to lead to beam displacements that cannot be corrected. Consequently, a grid-1 drive has to be used.
Keywords: CRT; tracking; electron gun; spot size
AB - In this paper, we describe the electron-optics involved in realizing a maskless CRT based on tracking the electron beams along horizontally aligned phosphor lines. We discuss the boundary conditions in order for the system to function. Emphasis is placed on the requirements of color purity, beam current, and spot size. A dedicated electron gun has been designed and tested. Results indicate that the spot-size requirements for the feasibility of the concept can be met. The depth of focus, in terms of the allowed mismatch of the dynamic focusing voltage, is small. Inter-beam space-charge repulsion turns out to be unproblematic. The cathode drive is shown to lead to beam displacements that cannot be corrected. Consequently, a grid-1 drive has to be used.
Keywords: CRT; tracking; electron gun; spot size
U2 - 10.1889/1.1825663
DO - 10.1889/1.1825663
M3 - Article
SN - 1071-0922
VL - 11
SP - 325
EP - 332
JO - Journal of the Society for Information Display
JF - Journal of the Society for Information Display
IS - 2
ER -