Browse Prior Art Database

Block Mode Operation of Video Plasma Display

IP.com Disclosure Number: IPCOM000040368D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Criscimagna, TN: AUTHOR [+4]

Abstract

One technique for operating a plasma display in video mode is to write and then erase a line followed by a selective write operation in order to update the panel contents in video mode. For fast update time and/or large panel size, it is desirable to minimize the erase time. The inherent feature of the plasma panel provides persistence during the time pels (picture elements) in other parts of the plasma panel are being updated. If a block of lines is totally erased in one operation, it can be followed by selective write operations for each line, thereby allowing prorating of the erase time over the time for writing each line. Successive blocks of lines are operated on in this fashion until the entire frame is complete.

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Block Mode Operation of Video Plasma Display

One technique for operating a plasma display in video mode is to write and then erase a line followed by a selective write operation in order to update the panel contents in video mode. For fast update time and/or large panel size, it is desirable to minimize the erase time. The inherent feature of the plasma panel provides persistence during the time pels (picture elements) in other parts of the plasma panel are being updated. If a block of lines is totally erased in one operation, it can be followed by selective write operations for each line, thereby allowing prorating of the erase time over the time for writing each line. Successive blocks of lines are operated on in this fashion until the entire frame is complete. To further describe the operation, assume that the first block of 16 lines of the panel have had all their cells turned ON, probably during vertical retrace time. The first operation that takes place is a block erase of the 16 lines. The erase operation will be a complete erase and not pattern sensitive, since it has been preceded by a block write that provided abundant piloting. Then, in sequence, the 1st through the 10th panel line of the block will be selectively written. By utilizing a high speed write having two write pulses per sustain cycle, only 5 sustain cycles are required for 10 lines. The next operation is a block write during the 6th sustain cycle to turn ON all the cells of the following 16...