US3878430A - Self shift display panel driving system - Google Patents

Self shift display panel driving system Download PDF

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Publication number
US3878430A
US3878430A US371477A US37147773A US3878430A US 3878430 A US3878430 A US 3878430A US 371477 A US371477 A US 371477A US 37147773 A US37147773 A US 37147773A US 3878430 A US3878430 A US 3878430A
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Prior art keywords
electrodes
discharge
voltage
magnitude
shift
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Expired - Lifetime
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US371477A
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English (en)
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Tadatsugu Hirose
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Fujitsu Ltd
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Fujitsu Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel

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  • ABSTRACT A self shift display panel driving system in which a discharge spot produced by written information is shifted by sequential switching of an impression voltage; a stationary display of the written information by the discharge spot is provided by the application of the impression voltage to a predetermined electrode; and the shift action is effected at high speed and stabilized by the impression of a voltage higher than a sustain voltage for the stationary display.
  • This invention relates to a self shiftdisplay panel driving system in which display information is written while sequentially shifting a discharge spot.
  • the electrodes it. al, a2, bl, b2, and cl, ('2, are connected to buses W. A. B and C. respectively, and the electrodes ⁇ '1' are interconnected.
  • the information written in the selected one of the electrodes Ri is shifted in the form of a discharge spot to the left. as seen in FIG. I, by the sequential voltage impression to the buses A. B and C.
  • the discharge spot also is stopped on the electrode leading to the bus being supplied with the voltage at that time. thus providing a display in a stationary condition.
  • this type of self shift pane it is possible to shift serially written information in the form of a discharge spot from one side of the panel and provide its stationary display at any time by making use of the memory function due to a wall charge.
  • the present invention is to provide a novel self shift display panel driving system which is free from the aforementioned defects experienced in the prior art and which utilizes the fact that a firing voltage and a minimum sustain voltage at adjacentelectrode intersecting points differ in accordance with'the magnitude of an impressed voltage, thereby ensuring and facilitating the shift action and automatically erasing a wall charge following each step of the shift action.
  • the self shift display panel driving system of this invention is of the type in which a discharge spot is shifted by sequential changeover of an impression voltage and written information is displayed with a predetermined sustain voltage at any time and which is characterized in that the discharge spot is shifted while impressing a voltage higher than the sustain voltage for the display.
  • FIG. 1 is a cross-sectional view of the principal part of a prior selt shift display panel
  • FIG. 2 shows characteristic curves for explaining the principle of this invention
  • FIG. 3 is a circuit diagram illustrating an embodiment of this invention.
  • FIGS. 4A and 4E show a series of waveforms for explaining the operation of the embodiment of FIG. 3.
  • the present invention has found. in connection with such a self shift display panel as described previously. that where a discharge is being produced between opposing electrodes. the firing voltage and the minimum sustain voltage beween neighboring opposing electrodes are affected by the discharge in accordance with the magnitude of the impression voltage for the discharge. For example, in FIG. 2, where a discharge is being produced between the electrodes y and x1, if the impressed voltage therebetween is high, the firing voltage Vf and the minimum sustain voltage Vsm between the other adjacent electrodes become that as indicated respectively by the curves b and b, and if the impression voltage is low, they become as indicated by the curves a and a. Namely.
  • the firing voltage Vf between adjacent electrodes y and .v2 lowers, for example, from Vfa to Vfb. allowing ease in the self shift action.
  • the minimum sustain voltage Vsm rises, so.that an increase in the voltage for discharging after shifting. decreases wall charges between previously energized electrodes to facilitate erasing of the wall charges.
  • the difference between the firing voltage between subsequent electrodes y and x3 and that between those y . ⁇ 2 adjacent to them is A Ml when the impressed voltage between the electrodes y-and .vl between which the discharge spot is being produced is low and the difference is A M2 when the impressed voltage is high. The greater the difference A M becomes, the more stable the self shift action becomes.
  • An increase in the impressed voltage causes an increase in the difference A M.
  • the discharge spot being displayed stationary by the sustain voltage V1 between the electrodes and .rl may be shifted to electrodes y and . ⁇ 2 by utilizing the above-described phenomenon.
  • first a voltage V2 higher than that V1 is impressed between the electrodes and . ⁇ 'l, and y and . ⁇ '2 to provide a discharge spot on the electrodes . ⁇ '1 and . ⁇ '2 in common; thus.
  • first the voltages V1 and V2 are impressed to the electrodes . ⁇ '1 and 12, respectively; and then the voltage impressed upon the electrode . ⁇ 'I is removed.
  • the discharge spot is shifted and, at the same time. the discharge spot between the electrodes y and . ⁇ 'l is extinguished so that the wall charge is reduced.
  • the wall charge remaining in the wall at the position corresponding to the previous electrode .rl can be erased positively by a neutralizing action in a relatively short time or by the impression of an erasing pulse.
  • shifting of the discharge spot between the pair of electrodes y and . ⁇ '2 to between electrodes y and . ⁇ '3 also is achieved by similar procedures. This facilitates the shifting and ensures erasing of the remaining wall charge.
  • the sustain voltage for the display operation and the shift voltage for the shift operation both are selected to be higher than the firing voltage at the position of adjacent electrodes subject to the primary current effect but, in the present invention. the impressed voltages V1 and V2 for both operations are different from each other.
  • FIG. 3 is a circuit diagram of one embodiment of this invention. which is shown to be applied to a self shift display panel SSP of two-dimensional shift.
  • Reference characters V V V designate write pulse voltages; Va: a voltage of the bus W; V V and V voltages applied to the buses A, B and C; V V V and V voltages applied to buses D, AL, BL and CL; and
  • V1, V2 and V3 voltages shown in FIG. 2 are selected the buses AL. BL. CL and D serve as a display part 22.
  • written information is shifted sequentially in a horizontal direction as seen in FIG. 3 and, in the display part 22, the information is shifted in a vertical direction as seen in FIG. 3 from the input part to provide a display.
  • the buses A, B and C are supplied sequentially with combined pulse voltages V V, and V of the voltages V1 and V2 and the buses AL, BL and CL are grounded through a transistor 03.
  • the buses AL, BL and CL are supplied sequentially with combined pulse voltages V V and V of the voltages V1 and V2 and the buses A, B, C and D are grounded through transistors Q2 and QD2.
  • the pulse voltages V and V or V,, and V of the voltage V1 are impressed only between the buses AL and A or between buses D and AL.
  • the voltages V1, V2 and V3 bear such a relation that V1 V2 V3.
  • the voltages, for example, V and V are selected at V2 to facilitate shifting from the electrode connected with the bus B to that connected with the bus C. Then,
  • the voltages V, and V are selected at V1 and V2, respectively, and the impression of the voltage V is stopped to erase the discharge on the electrode connected to the bus B.
  • transistors QB2 and QC 2 are turned on to impress the voltage V2
  • transistors Q2 and Q4 are turned on to discharge the stored charges.
  • transistors Q81 and QC2 are turned on and transistors Q2 and Q4 are turned off.
  • the discharge spot can be shifted from the electrode connected with the bus C to that connected with the bus A.
  • written information can be displayed stationary by the wall charge.
  • FIGS. 4A to 4E are a series of waveform diagrams for explaining writing and shifting in the input part 20.
  • transistors QRl QRi are turned on selectively by the written information to be supplied with a voltage -(V3Vl a transistor QRSl is turned on and then a transistor OR is turned on to be supplied with the voltage V1 and. further, a transistor QRS2 is turned on and, as a result of this, a voltage of a waveform V in FIG. 4A is impressed.
  • transistors Q2 and Q4 are turned on and a transistor QWZ is turned on to be supplied with the voltage V2, after which the transistors Q2 and Q4 are turned off and, further, the transistor QWZ is turned on and then the transistors Q2 and Q4 are turned on, thus impressing a voltage having a waveform Vw in FIG. 48 to the bus W.
  • the write electrodes opposing the electrodes connected to the bus W are selected to produce a discharge.
  • a transistor QB2 is turned on to impress the pulse V2 of the voltage V, to the bus B, performing the shift action.
  • the vertical shift to the display part 22 is the same as described above and the voltages V V and V similar to the aforementioned are impressed to the buses AL, BL and CL by controlling transistors OARI, QAR2, QBRl, QBR2, QCRl, QCR2, QDl, Q1 and O3 to achieve thereby the shift operation.
  • the display is continuously provided with the voltage Vl as a sustain voltage by the control of the transistors QD, QD2, QARl and Q3.
  • the voltage V2 lower than a usual firing voltage but higher than the sustain voltage in the case of the stationary display is impressed to adjacent electrodes to facilitate shifting of the discharge spot, and in this case, the minimum sustain voltage of the adjacent electrodes is raised by the formation of the discharge spot by the impression of the voltage V2, but the voltage V1, which is higher than the usual sustain voltage but lower than the raised minimum sustain voltage, is impressed to the preceding electrodes to erase the wall charge, so that the shifting speed can be enhanced.
  • the voltages V2 and V1 are different only in magnitude and can be made identical in pulse width with each other, the control is simple and easy as compared with the system of impressing an erasing pulse.
  • the circuit such as shown in FIG. 3 has theconstruetion of a low impedance circuit. so that voltage fluctuation due-to a discharge current is little and hence the operation is stable.
  • An energizing system for a gas discharge display panel including a first base plate and a first set of electrodes disposed thereon. and a second base plate and second set of electrodes disposed thereon to traverse said first set of electrodes for defining a discharge region at each of the intersections of said electrodes of said first and second sets, and said first and second base plates confining a discharge gas therebetween, said display panel having the characteristics that a firing voltage of a first magnitude applied between said electrodes of said first and second sets causes a discharge spot in the discharge region and a sustain voltage of a second magnitude less than the first magnitude applied between said electrodes of said first and second sets sustains said discharge spot in the discharge region, said energizing system comprising:
  • said sustain voltage applying means includes a first plurality of switch means, each connected to said sustain voltage supplying means for applying selectively the sustain voltage to a corresponding one of said first buss electrodes
  • said shift pulse applying means includes a second plurality of switch means. each connected to said shift voltage pulse supplying means for applying selectively the shift voltage pulse to a corresponding one of said first buss electrodes.
  • An energizing system for a gas discharge display panel including a first base plate and a first set of electrodes disposed thereon. and a second base plate and a second set of electrodes disposed thereon to traverse said first set of electrodes for defining a discharge region at each of the intersections of said electrodes of said first and second sets and said first and second base plates confining a discharge gas therebetween, said display panel having the characteristics that a firing voltage of a first magnitude applied between said electrodes of said first and second sets causes a discharge spot in the discharge region and a sustain voltage of a second magnitude less than the first magnitude applied between said electrodes of said first and second sets sustains said discharge spot in the discharge region.
  • said energizing system comprising:
  • each of said first and second sets of electrodes includes first and second pluralities of said electrodes, and wherein:
  • said first plurality of electrodes of said first set traverses said first plurality of electrodes of said second set, defining discharge regions at the intersections thereof, and comprising an input portion of said display panel, and
  • said second plurality of electrodes of said first set traverses said second plurality of electrodes of said second set defining discharge regions at the inter- 7 sections thereof comprising a display portion of said display panel. 7 10.
  • a common write electrode disposed upon said first base plate and a plurality of write selection electrodes disposed upon said second base plate and traversing said common write electrode, each of said write selection electrodes being associated write selection electrodes.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Gas-Filled Discharge Tubes (AREA)
US371477A 1972-06-22 1973-06-19 Self shift display panel driving system Expired - Lifetime US3878430A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6276872A JPS5431651B2 (US07488766-20090210-C00029.png) 1972-06-22 1972-06-22

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US3878430A true US3878430A (en) 1975-04-15

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US (1) US3878430A (US07488766-20090210-C00029.png)
JP (1) JPS5431651B2 (US07488766-20090210-C00029.png)
DE (1) DE2331883C3 (US07488766-20090210-C00029.png)
FR (1) FR2189859B1 (US07488766-20090210-C00029.png)
GB (1) GB1439533A (US07488766-20090210-C00029.png)
NL (1) NL177860C (US07488766-20090210-C00029.png)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB520613I5 (US07488766-20090210-C00029.png) * 1974-11-04 1976-03-16
US3958233A (en) * 1974-07-31 1976-05-18 Owens-Illinois, Inc. Multiphase data shift device
US3964050A (en) * 1975-05-21 1976-06-15 Control Data Corporation Plasma display panel
US4028584A (en) * 1974-10-18 1977-06-07 Nippon Electric Company, Ltd. Driving circuit for selecting control cells of a gas discharge panel by transistors through diodes
US4109181A (en) * 1976-03-29 1978-08-22 Fujitsu Limited Driving system and method for shifting a discharge spot in a plasma display panel
US4138626A (en) * 1975-05-28 1979-02-06 Fujitsu Limited Gas discharge display apparatus
US4150363A (en) * 1977-05-26 1979-04-17 International Business Machines Corporation Reduced connection for 22 character gas panel
US4180777A (en) * 1976-12-28 1979-12-25 Trio Kabushiki Kaisha Tuning meter for use with a pulse count FM demodulation circuit
US4328489A (en) * 1980-01-07 1982-05-04 Bell Telephone Laboratories, Incorporated Self-shift ac plasma panel using transport of charge cloud charge

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5030335B1 (US07488766-20090210-C00029.png) * 1969-10-04 1975-09-30
US4429256A (en) * 1981-09-30 1984-01-31 Bell Telephone Laboratories, Incorporated Selective shifting ac plasma panel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775764A (en) * 1972-10-02 1973-11-27 Ncr Multi-line plasma shift register display
US3795908A (en) * 1972-06-13 1974-03-05 Ibm Gas panel with multi-directional shifting arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3531685A (en) * 1967-09-29 1970-09-29 Burroughs Corp Gas discharge storage and display matrix
JPS5215186B2 (US07488766-20090210-C00029.png) * 1971-12-15 1977-04-27

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795908A (en) * 1972-06-13 1974-03-05 Ibm Gas panel with multi-directional shifting arrangement
US3775764A (en) * 1972-10-02 1973-11-27 Ncr Multi-line plasma shift register display

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958233A (en) * 1974-07-31 1976-05-18 Owens-Illinois, Inc. Multiphase data shift device
US4028584A (en) * 1974-10-18 1977-06-07 Nippon Electric Company, Ltd. Driving circuit for selecting control cells of a gas discharge panel by transistors through diodes
USB520613I5 (US07488766-20090210-C00029.png) * 1974-11-04 1976-03-16
US3991341A (en) * 1974-11-04 1976-11-09 Bell Telephone Laboratories, Incorporated Plasma discharge shift registers
US3964050A (en) * 1975-05-21 1976-06-15 Control Data Corporation Plasma display panel
US4138626A (en) * 1975-05-28 1979-02-06 Fujitsu Limited Gas discharge display apparatus
US4109181A (en) * 1976-03-29 1978-08-22 Fujitsu Limited Driving system and method for shifting a discharge spot in a plasma display panel
US4180777A (en) * 1976-12-28 1979-12-25 Trio Kabushiki Kaisha Tuning meter for use with a pulse count FM demodulation circuit
US4150363A (en) * 1977-05-26 1979-04-17 International Business Machines Corporation Reduced connection for 22 character gas panel
US4328489A (en) * 1980-01-07 1982-05-04 Bell Telephone Laboratories, Incorporated Self-shift ac plasma panel using transport of charge cloud charge

Also Published As

Publication number Publication date
NL177860B (nl) 1985-07-01
NL177860C (nl) 1985-12-02
GB1439533A (en) 1976-06-16
JPS5431651B2 (US07488766-20090210-C00029.png) 1979-10-08
JPS4923537A (US07488766-20090210-C00029.png) 1974-03-02
DE2331883A1 (de) 1974-01-17
DE2331883C3 (de) 1979-06-28
FR2189859A1 (US07488766-20090210-C00029.png) 1974-01-25
NL7308759A (US07488766-20090210-C00029.png) 1973-12-27
DE2331883B2 (de) 1978-11-02
FR2189859B1 (US07488766-20090210-C00029.png) 1977-02-18

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