US3872464A - Cold cathode discharge type display apparatus with integral memory - Google Patents

Cold cathode discharge type display apparatus with integral memory Download PDF

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Publication number
US3872464A
US3872464A US409973A US40997373A US3872464A US 3872464 A US3872464 A US 3872464A US 409973 A US409973 A US 409973A US 40997373 A US40997373 A US 40997373A US 3872464 A US3872464 A US 3872464A
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United States
Prior art keywords
discharge
cells
group
display
display apparatus
Prior art date
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Expired - Lifetime
Application number
US409973A
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English (en)
Inventor
Rentaro Sasaki
Akinori Watanabe
Mamoru Ikegame
Tatsuo Ogasawara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
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Oki Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
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Publication of US3872464A publication Critical patent/US3872464A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
    • H01J17/49—Display panels, e.g. with crossed electrodes, e.g. making use of direct current
    • H01J17/492—Display panels, e.g. with crossed electrodes, e.g. making use of direct current with crossed electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/26—Signs formed by electric discharge tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
    • H01J17/49—Display panels, e.g. with crossed electrodes, e.g. making use of direct current

Definitions

  • This invention relates to an improvement of a cold cathode discharge type display apparatus of the type wherein letters (including digits and symbols) are displayed by a plurality of display sections each including a group of discharge cells which are arranged in a matrix.
  • an input signal is converted into a signal containing a pattern information corresponding to a letter to be displayed on a display section by means of a matrix drive circuit.
  • Binary codes representing respective letters are stored in a memory device disposed on the outside of the display apparatus and the matrix drive circuit is controlled by the binary codes stored in the external memory device. For this reason, the construction of the prior art display apparatus is complicated and expensive because it is necessary to install an independent memory device.
  • the starting electrode 6 is also provided with a plurality of groups of perforations 3a and a plurality of groups of additional perforations 3h, each aligned with corresponding perforations of the upper substrate 1 and of the cathode electrode substrate 4.
  • the inner wall of each perforation of the starting electrode plate 6 is provided with a through hole'plating which is used as a starting electrode 12 connected to one of terminals 13 through a printed wire. not shown.
  • Each anode substrates 8 comprises a resistance body 14.
  • a plurality of projections corresponding to the respective perforations of the cathode electrode substrates 4 are formed of discharge cells identical to the discharge cells of the I display sections it is possible to greatly simplify the construction of the display apparatus.
  • a cold cathode discharge type display apparatus of the class wherein letters are displayed by a plurality of display sections each including a group of discharge cells which are arranged in a matrix, characterized in that there is provided an additional group of discharge cells which are disposed close to the group of discharge cells of each discharge section and that the additional group of discharge cells of each display section is used to store a binary code of a letter subsequently to be displayed.
  • the display apparatus illustrated in the accompanying drawing comprises an upper substrate 1 and a lower substrate 2. Between these substrates are disposed a cathode electrode substrate 4 provided with a plurality of groups of perforations 3, each group of perforations being arranged in a matrix to form a display section, a first spacer 5, a starting electrode plate 6, a second spacer 7 and a plurality of divided anode electrode substrates 8, one for each display section.
  • Starting electrode terminals 9 connected to electrodes to be described later and a cathode terminal 10 are printed on the lower surface of the upper substrate I which faces to the cathode electrode substrate 4 on the opposite ends the upper substrate 1.
  • the upper substrate 1 is on the upper surface of the resistance body 14 by means of a plurality of grooves intersecting with each other at right angles.
  • An anode electrode 15 is formed on the top of each projection by nickel plating.
  • a thin plate 16 of a 42-6 alloy, for example is bonded to the opposite surface of each resistance body 14.
  • the lower substrate 2 made of insulator is provided with starting electrode terminals 17 on the opposite sides thereof which are adapted to be electrically connected to the terminals on the starting electrode substrate 6 and anode terminals 18 respectively engaging the thin plates 16.
  • This cold cathode discharge type display apparatus is constructed such that the breakdown voltage between the anode electrodes 15 and the cathode electrode 11 is higher than the breakdown voltage between the anode electrodes 15 and the starting electrodes 12 and that the discharge sustaining voltage between the anode electrode 15'and the cathode electrode 11 is lower than that between the anode .electrodes 15 and the starting electrodes 12.
  • the above described cold cathode discharge type display apparatus operates as follows. An input signal is converted into a negative voltage by means of a matrix drive circuit and the negative voltage is impressed upon the starting electrode terminals 13 corresponding to the pattern information of the input signal. Then a voltage which is lower than the breakdown voltage between the anode electrodes 15 and the cathode electrode 11 but the sum of the first voltage and the voltage impressed upon the starting electrodes decreases to a value slightly higher than the breakdown voltage between the anode electrodes 15 and the starting electrodes 12 after a predetermined interval, is applied to particular one of the anode terminals 18. As a result. electric discharge will be established between the starting electrodes 12 and an anode electrode 15 connected to the particular anode terminal 18.
  • the discharge transfers in this manner, the discharge current increases with the result that due to the voltage drop across the resistance plate 14, the anodevoltage is decreased toa value near the discharge sustaining voltage between the anode and cathode electrodes, whereby the discharge is sustained between'only the anode and cathode electrodes.
  • the discharge transfers automatically from between the anode and starting electrodes to between the anode and cathode electrodes and thereafter this discharge is sustained irrespective of the condition of the input signal.
  • the discharge is sustained at a display section including perforations 3a and such discharge can be observed as a predetermined pattern through the upper substrate 1.
  • Perforations 3a constitute discharge cellsand the input signal applied to the starting. electrodes 13-functions to select the desired pattern.
  • the anode voltage selects a display section.
  • each group of discharge cells which is used to display a pattern there is provided a group of additonal discharge cells which are arranged on a column and used as a memory device. These additional discharge cells are formed by perforations 3b which comprise five bits in this example. These discharge cells are. used to memorize the code of a pattern to be displayed subsequently in a display section with which they are associated.
  • the voltage across the anode and cathode electrodes is high or the discharge current between the anode and cathode electrodes increases it is possible to read the code by measuring the voltage or current of the discharge cell of each bit and the read out code is converted into tion 3b is used as the memory elements.
  • the group of the discharge cells of each code display section is positioned onone side of an associated pattern display section, it will be clear that such group can also be disposed on the upper or lower side of the pattern display section.
  • a cold cathode discharge type display apparatus of the class wherein letters are displayed by a plurality of display sections each including a group of discharge display cells which are arranged in a matrix
  • the improvement which comprises an additional group of discharge code cells which are disposed close to but whose discharge space is isolated from said group of discharge display cells of each display section, said additional discharge code cells of each display section being used to store a binary code of a letter subsequently to be displayed in said discharge display cells.
  • the cold cathode discharge type display apparatus as claimed in claim 1 which comprises an upper substrate, a cathode substrate, a first spacer, a starting electrode, a second spacer, each provided with a plua signal which is supplied to the above described matrix rality of groups of aligned perforations which are ar ranged in matrices, a plurality of anode electrodes one for each group of .said perforations and a lower substrate, each group of aligned perforations of said upper substrate, said cathode substrate, said first spacer, said starting electrode, and said second spacer constituting discharge display cells of one letter display section,
  • an additional group 'of discharge code cells is provided for the group of discharge display cells of each letter display section, the discharge space of said code cells being isolated from said display cells, said additional group of discharge code cells being used to store a binary code of a letter subsequently to be displayed in said discharge display cells.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
US409973A 1972-11-01 1973-10-26 Cold cathode discharge type display apparatus with integral memory Expired - Lifetime US3872464A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1972125410U JPS5325494Y2 (enrdf_load_stackoverflow) 1972-11-01 1972-11-01

Publications (1)

Publication Number Publication Date
US3872464A true US3872464A (en) 1975-03-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US409973A Expired - Lifetime US3872464A (en) 1972-11-01 1973-10-26 Cold cathode discharge type display apparatus with integral memory

Country Status (5)

Country Link
US (1) US3872464A (enrdf_load_stackoverflow)
JP (1) JPS5325494Y2 (enrdf_load_stackoverflow)
DE (1) DE2354626C3 (enrdf_load_stackoverflow)
FR (1) FR2204878B1 (enrdf_load_stackoverflow)
GB (1) GB1424921A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996004672A1 (en) * 1994-08-03 1996-02-15 Alliedsignal Inc. A gas discharge display having printed circuit board members and method of making same
US5734361A (en) * 1994-06-08 1998-03-31 Canon Kabushiki Kaisha Electron-beam generating device having plurality of cold cathode elements, method of driving said device and image forming apparatus applying same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206638A (en) * 1962-04-04 1965-09-14 Lear Siegler Inc Memory for x-y plotter
US3609747A (en) * 1968-12-05 1971-09-28 Bell Telephone Labor Inc Solid-state display circuit with inherent memory
US3624633A (en) * 1969-11-13 1971-11-30 Princeton Electronic Prod Display system utilizing multifunction storage tube
US3644925A (en) * 1969-01-07 1972-02-22 Burroughs Corp Gaseous discharge display panel with auxiliary excitation cells

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206638A (en) * 1962-04-04 1965-09-14 Lear Siegler Inc Memory for x-y plotter
US3609747A (en) * 1968-12-05 1971-09-28 Bell Telephone Labor Inc Solid-state display circuit with inherent memory
US3644925A (en) * 1969-01-07 1972-02-22 Burroughs Corp Gaseous discharge display panel with auxiliary excitation cells
US3624633A (en) * 1969-11-13 1971-11-30 Princeton Electronic Prod Display system utilizing multifunction storage tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5734361A (en) * 1994-06-08 1998-03-31 Canon Kabushiki Kaisha Electron-beam generating device having plurality of cold cathode elements, method of driving said device and image forming apparatus applying same
US6580407B1 (en) 1994-06-08 2003-06-17 Canon Kabushiki Kaisha Electron-beam generating device having plurality of cold cathode elements, method of driving said device and image forming apparatus applying same
WO1996004672A1 (en) * 1994-08-03 1996-02-15 Alliedsignal Inc. A gas discharge display having printed circuit board members and method of making same

Also Published As

Publication number Publication date
DE2354626B2 (de) 1974-12-19
FR2204878B1 (enrdf_load_stackoverflow) 1978-03-10
FR2204878A1 (enrdf_load_stackoverflow) 1974-05-24
DE2354626C3 (de) 1975-07-31
DE2354626A1 (de) 1974-05-09
JPS4980658U (enrdf_load_stackoverflow) 1974-07-12
GB1424921A (en) 1976-02-11
JPS5325494Y2 (enrdf_load_stackoverflow) 1978-06-29

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