Improving display quality by a digital convergence correction system for multibeam CRTs

J. K. Patrick Barels; Albert F. Lubbers; Cornelis H. Slump; Rudolf Kemner; Aartjan Hoeven

doi:10.1117/12.238487

15 April 1996 Improving display quality by a digital convergence correction system for multibeam CRTs

J. K. Patrick Barels, Albert F. Lubbers, Cornelis H. Slump, Rudolf Kemner, Aartjan Hoeven

Proceedings Volume 2707, Medical Imaging 1996: Image Display; (1996) https://doi.org/10.1117/12.238487
Event: Medical Imaging 1996, 1996, Newport Beach, CA, United States

Abstract

In the field of medical imaging there is a need for high-resolution high-brilliance monochromatic CRT displays. However, at higher brightness levels the resolution of these displays decreases, due to the increasing spot size. In order to improve the performance of the CRT display a relatively simple method, called the multi-beam concept, is introduced. Using this technique a higher brightness can be realized without an increase of the spot size and therefore a better display quality can be achieved. However, for successful exploitation of the multi-beam concept it is necessary to minimize the convergence error of the CRT display. For this purpose two circuits have been realized, where the convergence error is reduced by an analogue and a digital method respectively. The analogue implementation means an improvement for the applicability of the multi-beam concept, however, in order to achieve major image quality improvement the use of the digital system is necessary.

Citation Download Citation

J. K. Patrick Barels, Albert F. Lubbers, Cornelis H. Slump, Rudolf Kemner, and Aartjan Hoeven "Improving display quality by a digital convergence correction system for multibeam CRTs", Proc. SPIE 2707, Medical Imaging 1996: Image Display, (15 April 1996); https://doi.org/10.1117/12.238487

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