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Display Resolution Improvement Disclosure Number: IPCOM000043330D
Original Publication Date: 1984-Aug-01
Included in the Prior Art Database: 2005-Feb-04

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Related People

Dyche, MP Rowe, HL [+details]


The display of low resolution data or graphics on a high resolution display monitor is disclosed. An IBM Personal Computer (PC) provides 200 lines of non-interlaced video which is displayed on an IBM 3279 display designed to display an interlaced picture of 384 lines (Model 3). The vertical sync from the PC is delayed by half a line time on alternate fields to give an interlaced display of improved legibility. When a low resolution raster image is scanned in a non-interlaced mode on a high resolution display, the line structure becomes excessively visible, and the picture quality is unacceptable. Here, 200 lines of video from the IBM PC are scanned onto the 3279 CRT when in PC display mode. The 3279 tube has high resolution and good focus and convergence. It was designed to display a picture of 384 scan lines (Model 3).