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EP0155488A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Raster scan display device and method

Assignee: International Business Machines Corp
•
Filing: 1985-02-08
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Granted: —
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Expires: 2005-02-08
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Abstract

Abstract @ An A.C. Plasma Display Panel is operated in a video mode using the same signal train as applied to a conventional cathode ray tube terminal. For character generation, a selective erase technique is employed in which all cells in a raster line are energised and then selectively erased in accordance with the video data to be displayed. To facilitate the erase operation, a line of cells in close proximity to the scan line being selectively erased is employed to provide adequate and uniform priming for the erase operation, and is synchronised to maintain its position with respect to the line being erased. A short plasma erase signal is utilised to fit within the scan rate of the display. The invention is also applicable to character generation in block or multi-line mode.

Inventors

  • 👤 Tony Nick Criscimagna
  • 👤 Harry Swartzlander Hoffmann, Jr.
  • 👤 William Robert Knecht

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 03:27
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/28; G09G3/288; G09G3/291; G09G3/293; G09G3/2935; G09G1/00

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 102 words
A raster scan display device of the kind in which the display is generated, progressively within rows of display areas and progressively by row in a given direction, from an input data stream, characterised in that the display element is a plasma display device having a matrix of display cells organised in rows and columns, and means are provided for energising a pair of proximate rows of cells, the row pair progressing in the given direction, and for selectively extinguishing cells of the lagging row of the pair in correspondence with the section of the input data stream appropriate to that row.
Claim 2
Dependent Claim 102 words
A raster scan display device of the kind in which the display is generated, progressively within rows of display areas and progressively by row in a given direction, from an input data stream, characterised in that the display element is a plasma display device having a matrix of display cells organised in rows and columns, and means are provided for energising a pair of proximate rows of cells, the row pair progressing in the given direction, and for selectively extinguishing cells of the lagging row of the pair in correspondence with the section of the input data stream appropriate to that row.
Claim 3
Dependent Claim 35 words
A raster scan display device as claimed in claim 1 wherein the proximate rows are immediately adjacent and the conventional pilot cells of a plasma display element are omitted from the plasma display element incorporated.
Claim 4
Independent Claim 101 words
A method of generating a raster scan display on a plasma display element which has a matrix of display cells organised in rows and columns comprising aligning the raster scan lines with the cell matrix rows, energising all the cells in the cell row corresponding to the current raster scan line together with all the cells in a cell row, proximate thereto but corresponding to a raster scan line not yet reached in the raster scan and extinguishing those cells in the cell row corresponding to the current raster scan line which are not required to remain energised to display data.
Claim 5
Independent Claim 101 words
A method of generating a raster scan display on a plasma display element which has a matrix of display cells organised in rows and columns comprising aligning the raster scan lines with the cell matrix rows, energising all the cells in the cell row corresponding to the current raster scan line together with all the cells in a cell row, proximate thereto but corresponding to a raster scan line not yet reached in the raster scan and extinguishing those cells in the cell row corresponding to the current raster scan line which are not required to remain energised to display data.

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