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Publication numberUS3903516 A
Publication typeGrant
Publication dateSep 2, 1975
Filing dateJun 26, 1973
Priority dateJun 26, 1973
Also published asCA1031878A1, DE2430460A1, DE2430460B2
Publication numberUS 3903516 A, US 3903516A, US-A-3903516, US3903516 A, US3903516A
InventorsMauro Jr Nickolas Ralph
Original AssigneeIbm
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Control logic for gas discharge display panel
US 3903516 A
Abstract
An external source supplies command and data bytes which are decoded to control the energization of a gas discharge display panel in order to display thereon alpha-numeric characters and other symbols. Each command is decoded to determine whether it is a POSITION command or one of the following commands: WRITE CHARACTER, WRITE SLICE, ERASE DATA and ERASE PANEL. If a POSITION command is decoded, following data bytes are decoded and stored as the starting cell address of the gas panel. If the next command is a WRITE CHARACTER or WRITE SLICE command, the following data byte specifies the code of a character or the horizontal data slice, respectively, to be written or displayed in the panel beginning at the starting cell address. Corresponding individual row and column latchable drivers or bistable switching circuits are then set to select the panel drive lines which are to be energized to illuminate the gas cells designated by the character or slice data byte. If the next command had been an ERASE DATA command, the following data byte would have specified the width and height of a block of cells to be erased, and the corresponding panel line drivers would have been set to permit extinguishment or erasure of the cells in the specified block. An ERASE PANEL command causes all the cells of the panel to be simultaneously erased. At an appropriate time after the selected drivers are latched, an analog power circuit causes the set drivers to apply appropriate sustain, write or erase voltages to the selected panel lines.
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United States Patent Mauro, Jr.

[ Sept. 2, 1975 CONTROL LOGIC FOR GAS DISCHARGE DISPLAY PANEL Nickolas Ralph Mauro, Jr., Woodstock, NY.

[75] Inventor:

['73] Assignee: International Business Machines Corporation, Armonk, NY.

22 Filed: June 26,1973

21 Appl.No.:373,700

Primary E.raminerDavid L. Trafton Attorney, Agent, or FirmSughrue, Rothwell, Mion,

Zinn and Macpeak [5 7] ABSTRACT An external source supplies command and data bytes which are decoded to control the energization of a gas I I I PROCESSOR CONTROL CHIP -DECODEO DRIVER SELECT SI discharge display panel in order to display thereon alpha-numeric characters and other symbols. Each command is decoded to determine whether it is a POSI- TION command or one of the following commands: WRITE Cl-IAILACFER, WRITE SLICE, ERASE DATA and ERASE PANEL. If a POSITION command is decoded, following data bytes are decoded and stored as the starting cell address of the gas panel. If the next command is a WRITE CHARACTER or WRITE SLICE command, the following data I byte specifies the code of a character or the horizontal data slice, respectively, to be written or displayed in the panel beginning at the starting cell address. Corresponding individual row and column latchable drivers or bistable switching circuits are then set to select the panel drive lines which are to be energized to illuminate the gas cells designated by the character or slice data byte. If the next command had been an ERASE DATA command, the following data byte would have specified the width and height of a block of cells to be erased, and the corresponding panel line drivers would have been set to permit extinguishment or erasure of the cells in the specified block. An ERASE PANEL command causes all the cells of the panel to be simultaneously erased. At an appropriate time after the selected drivers are latched, an analog power circuit causes the set drivers to apply appropriate sustain, write or erase voltages to the selected panel lines.

10 Claims, 25 Drawing Figures ESB LA.Y IMEL "J ISECM TED CEIHISL VERTICAL I ISOLATION CIRCUITS VERTICAL LINE DRIVERS HORIZONTAL ISOLATION CIRCUITS ANALOG POWER CIRCUITS I I I I I I I I I l I I I I I LBR PATENTEUSEP 2M5 SW 6 3,903,516

FIG. 5A RESET, we a COMMAND DECODE IN ITIALIZE LEVEL "5 500 MS INPUT I NITIALIZE LVL= ACTLVE INPUT 08C. PULSE BLOCKED YES 'BLOCK SET INPUTOSC. FREQDVDRS. HDVDR PULSE F1 AND F2 STEP PULSE 'CLR SUSTAIN W UNA CLR YES J 1 CYCLE STEP PULSE POSITION LTH W SET HZ coARsE CHAR CODE CMD LTH LTH COMPLEMENT C R C F1 DVDR L LR HZ FINE V EXECUTE CMD LTH LTH 'CLR QCLR ALL VT COARSE V SEQUENCE 'COMPLEMENT CMD LTH LTHS F2 DVDR 'CLR 'CLR VT FINE cuc-4 CMD LTH N 'CLR 'CLR WRT CHAR cues GEN CMD LTH TO 0 NA EARLY 'CLR 'CLR WRTSLICE PULSE CMD LTH LTH 'sEE ERAsEUAEA POSITION REGS CMD LTH TO (A 'QJGEAN SET OCLR ERAsE. PANEL POSITION LD CMD LTH LEN OCLR OCLR RECYCLE ACCEPT LTH LTH PATENTEU 35? 21975 SHEET 22:28 20522 4b QE z omw w omw @5056 m3. H 303. -30 5Q -30 Eu P 25 5528 05% w 25 26 mm 8 SHEET E8 is H 501; P 5

$4 255 mom PATENTEDSEP 2191s

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3090041 *Nov 2, 1959May 14, 1963Link Aviation IncCharacter generation and display
US3747073 *Mar 16, 1972Jul 17, 1973Philips CorpElectrical display devices
US3753038 *Dec 11, 1970Aug 14, 1973Owens Illinois IncMethod and apparatus for operating row-column matrix panels and devices
US3754230 *Dec 21, 1970Aug 21, 1973Raytheon CoPlasma display system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6326943 *Apr 13, 1995Dec 4, 2001Canon Kabushiki KaishaDisplay device
US8077173 *Apr 11, 2007Dec 13, 2011Panasonic CorporationDriving device for driving display panel, driving method and IC chip
Classifications
U.S. Classification345/68, 345/204
International ClassificationG09G3/28, G06F3/147
Cooperative ClassificationG06F3/147, G09G3/28
European ClassificationG06F3/147