Browse Prior Art Database

Free-Run Pattern Concept

IP.com Disclosure Number: IPCOM000112790D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Sohda, M: AUTHOR [+2]

Abstract

The free-run pattern is a concept to let users know what is a proper action to fix the current problem on the interface signals between a Personal Computer (PC) and monitor display, by changing the free-run pattern according to the types of the problems. The problems, which are intended to be managed in this concept, are interface problems, usually caused by reasons such as the video connector is not plugged in firmly, Hsync timings are not matched to the monitor or Vsync timings are not matched to the monitor, etc. Users can easily isolate and fix the problem, if they know the proper action to take.

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Free-Run Pattern Concept

      The free-run pattern is a concept to let users know what is a
proper action to fix the current problem on the interface signals
between a Personal Computer (PC) and monitor display, by changing the
free-run pattern according to the types of the problems.  The
problems, which are intended to be managed in this concept, are
interface problems, usually caused by reasons such as the video
connector is not plugged in firmly, Hsync timings are not matched to
the monitor or Vsync timings are not matched to the monitor, etc.
Users can easily isolate and fix the problem, if they know the proper
action to take.

      The Figure shows a functional block diagram of this concept.
Problem detection block(*1) detects a problem on the video interface
between the PC and monitor.  The free-run pattern generator(*2)
decides which type of the free-run pattern should be displayed
according to an output from the problem detection block.  Then the
free-run pattern generator outputs the free-run pattern and sync
signals, such as Hsync, Vsync, etc.  Display control circuit
block(*3) displays the free-run pattern instead of the input video
signals from the PC, only when the problem detection block detects
the error.

      The displayed free-run pattern can consist of a graphic image,
character information or both, according to the monitor.  In the case
when the whole information can not be displayed in the free-run
pattern, users can refer to the res...