US3801852A - Picture producing plasma display device and method of making it - Google Patents

Picture producing plasma display device and method of making it Download PDF

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Publication number
US3801852A
US3801852A US00318369A US3801852DA US3801852A US 3801852 A US3801852 A US 3801852A US 00318369 A US00318369 A US 00318369A US 3801852D A US3801852D A US 3801852DA US 3801852 A US3801852 A US 3801852A
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cavities
aligned
electrodes
substrate
glass
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US00318369A
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English (en)
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J Janning
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NCR Voyix Corp
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NCR Corp
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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
    • H01J11/10—AC-PDPs with at least one main electrode being out of contact with the plasma
    • H01J11/12—AC-PDPs with at least one main electrode being out of contact with the plasma with main electrodes provided on both sides of the discharge space

Definitions

  • Each image to be displayed is produced by first making a half-tone transparency film of a picture to be displayed.
  • the transparency film has data dots thereon, and these dots are then used in forming the cavities associated with each image.
  • This invention relates to a picture producing plasma display device and the method of making it.
  • FIG. 13 is a diagram similar to FIG. 9 showing how the cavities are assigned to cavity location areas in a device in which up to nine fixed images are to be displayed.
  • FIG. 10 shows an enlarged half-tone pattern of a womans face.
  • the picture negative (like 34 in FIG. 3) from which the half-tone transparency film was made, has a generally clear portion for the area of the woman s hair which is actually dark in color. Because this area is clear, it shows up on the half-tone transparency film (shown in FIG. 10) as a plurality of large black data dots, and contrastly, those areas which are dark on the picture negative (like 34) for high lighted cheek areas, for example, show up as small diameter data dots on the half-tone transparency film in FIG. 10.
  • the structure of the plasma display device shown in FIG. 8, and designated generally as 80, is generally similar to the display device 10 shown in FIG. 2; therefore, where the elements of the devices and 10 are the same, the same reference numerals applied to device 10 will be used in device 80.
  • the display device 80 includes a first glass substrate 12, having the electrodes 72 and 74 secured thereto as shown. These electrodes may be made of a conductor material like silver which is 0.00015 inch thick.
  • the cavity plate 70 is conventionally secured to the first substrate 12 and has cavities therein as shown. These cavities will be later discussed herein relative to FIG. 9.
  • the second glass substrate 14 has the vertically aligned electrodes 76 and 78 secured thereto as shown.
  • Electrodes are made of a transparent conductor material like tin oxide and have a thickness of about 0.00001 inch.
  • a thin layer of clear glass 82 to be positioned over the electrodes 76, 78, is used to isolate them from the ionizable gas which is located in the cavities, as previously explained.
  • Glass frit 26 is used to seal the display device 80, and a filling tube 28 is used to evacuate the air from the cavities and fill them with an ionizable gas.
  • the data dots associated with the second, third, and foruth fixed images are used to form the cavities numbered with a 2, 3, and 4 respectively.
  • One technique for forming the cavities in the cavity plate 70 for each of the four images makes use of a template 84, or screen or the like, shown in FIG. 1 l.
  • the template 84 (FIG. 11) is made of a thin opaque material and has a plurality of square holes 86 therein. Each hole 86 is located in the template to be aligned with one of the cavity location areas on the cavity plate 70. In the template 84 shown, a hole 86 is present for every other cavity location proceeding in a horizontal direction and a vertical direction. In effect, if the cavities for four images are to be formed on the cavity plate 70, the template 84 acts as a mask to permit only onefourth of the data dots for each image to pass therethrough to reach alternate cavity location areas.
  • the data dots associated with the half-tone transparency film for the second image are aligned with the holes 86 of the template and the photoresist is again exposed using the second half-tone transparency film to form the pattern of cavities on the photoresist.
  • the second half-tone transparency film is removed and the process just described is repeated for the third and fourth half-tone transparency films which are to be exposed on the photoresist.
  • the template 84 is indexed so that the holes 86 therein are aligned with the cavity location areas marked with a 3 in FIG. 9, and similarly, the template 84 is indexed so that the holes 86 therein are aligned with the cavity location areas marked with a 4 when the fourth half-tone transparency film is used.
  • the photoresist is conventionally, chemically processed and the cavity plate like in FIG. 8 is etched to produce cavities having a depth of 0.004 inch.
  • the cavities (like the ones shown in FIG. 9) so produced, have diameters which correspond to the diameters of the data dots of their associated half-tone transparency films.
  • the electrodes 72 of the first electrode means are connected to a first common terminal marked A, and similarly, the electrodes 74 are connected to a second common terminal marked B.
  • the electrodes 76 of the second electrode means are connected to a first common terminal marked 1, and similarly, the electrodes 78 are connected to a second common terminal marked 2 in FIG. 9.
  • the horizontally-positioned electrodes 72 are aligned with the cavities marked 1 in FIG. 9, and the vertically-positioned electrodes 76 are also aligned with the cavities marked 1 so that these cavities are located at the crossover points of the electrodes 72 and 76.
  • the terminal marked A and the terminal marked 1 are connected to a source of AC potential.
  • the terminals A and 1" are energized conventionally, any cavity located at the crossover points marked 1 will be energized, and accordingly, the first fixed image is displayed.
  • the following chart shows what fixed image will be displayed when an energizing potential is applied to selected terminals of the display device shown in FIGS. 8 and 9:
  • FIG. 12 shows another embodiment of the invention which can selectively display four images; however, the cavities in this embodiment are formed around posts by the technique (with some modifications) already described in relation to FIG. 5.
  • the template 84 is placed thereover, with the holes 86 being aligned with the cavity location areas marked with a 1 on the cavity plate 90.
  • the half-tone transparency film for the first image is then placed over the template 84 with-the data dots thereof in registration with the holes 86.
  • only one-fourth of the data dots of each half-tone transparency film will be printed when four images are to be displayed on the device.
  • the template 84 is indexed as previously explained, to align the holes 86 thereof with the cavity location areas marked with a 2 in FIG. 12.
  • the half-tone transparency film for the second image is then placed over the template 84 with the data dots thereof in registration with the holes 86. After exposing the photoresist, the second half-tone transparency film is removed, and the indexing and exposing technique just described is repeated for the third and fourth half-tone transparency films with the data dots for these films being respectively exposed onto the third and fourth cavity location areas of the plate 90. 4
  • the photoresist and the cavity plate 90 are then conventionally processed and chemically etched to produce posts, like the ones shown in FIG. 5, with the posts having a height of approximately 0.004 inch.
  • These posts like the ones marked 1, 2, 3, and 4, in FIG. 12, have diameters which vary in accordance with the corresponding data dots of the associated half-tone transparency films. Because these posts are made of a black glass, as previously explained, the cavities for the display device are actually formed around the posts.
  • the electrodes 72, 74, 76, and 78 may be aligned over the posts in the same manner as the electrodes were aligned over the cavities as shown in FIG. 9.
  • the electrodes for the cavities may be located between the posts as shown in FIG. 12.
  • the horizontally-positioned electrodes 72 (which are identical to the electrodes 72 in FIG. 9) are positioned between the posts numbered 1 and 3 while the horizontally-positioned electrodes 74 are positioned between the posts marked 4 and 2.
  • the vertically positioned electrodes 76 are correspondingly positioned between the posts marked 1 and 2
  • the vertically-positioned electrodes 78 are positioned between the posts marked 3 and 4.
  • the cavities associated with the images to be displayed are located on the cavity plate 90 at the crossover points of the horizontally and vertically positioned electrodes, with each said crossover point being located by an x.
  • the cavities associated with the first image are referenced as 1A while the cavities associated with the second, third, and fourth images are referenced as 2A, 3A, and 4A respectively.
  • the selection scheme for selecting the image to be displayed is identical to the scheme already described in relation to the embodiment shown in FIG. 9.
  • the connection terminals marked 1 and A are connected to a source of energizing AC potential.
  • the alternate horizontally-positioned electrodes 72 are connected to the connection terminal marked A, and the remaining horizontally-positioned electrodes 74 are connected to the connection terminal marked B.
  • the alternate, vertically-positioned electrodes 76 are connected to the connection terminal marked 1, and the remaining vertically-positioned electrodes 78 are connected to the connection terminal marked 2.
  • the actual configuration of the completed display device using the cavity plate is identical to the display device so shown in FIG. 8 already described, except for the differences pointed out with regard to FIG. 12.
  • the selection scheme for selecting the second, third, and fourth images to be displayed is identical to the chart already described in conjunction with FIGS. 8 and 9.
  • FIG. 13 The actual structure of a plasma display device incorporating the wiring pattern shown in FIG. 13 is similar to that shown in FIG. 8, and such a device may have the cavities therein produced by holes of varying diameters or posts as previously explained in connection with FIGS. 9 and 12 respectively.
  • the techniques used for producing a plasma display device having the wiring pattern shown in FIG. 13 are identical to those already described; however, the template (like 84 in FIG. 11) used in the procedure for exposing the photoresist would have the holes therein arranged to print oneninth of the data dots of each half-tone transparency film to be displayed by the device.
  • the post method of producing cavities permits the ionizable gas within the display device to easily flow around the posts and permits a more uniform firing voltage for firing the selected cavities than does the hole method.
  • a plasma display device made by the post method has a picture panel which is all lit, with black areas produced by the posts and is generally similar to a television screen.
  • the overall contrast of the image produced by the post method is not as good as image produced by the hole method shown in FIGS. 4 and 9, for example, wherein discrete, lighted cells are provided.
  • FIG. 6 shows an enlarged, modified form of a portion of a screen 104 which may be used in producing a halftone transparency film for producing the desired images in a plasma display device of this invention.
  • the screen 104 is composed of wires like 106 and 108 which are aligned in spaced, parallel, relationship in a vertical direction, and wires 110 and 112 which are aligned in spaced, parallel relationship in a horizontal direction to produce a mesh characteristic of screens used in producing half-tone transparency films.
  • the screen 104 is different from the usual screen, however, in that every other opening of the screen (when proceeding in horizontal and vertical directions) is covered with an opaque material to prevent light from passing therethrough except in the clear areas 114.
  • the screen 104 may have a mesh of 65 lines per inch and when used in place of screen 42 shown in the apparatus in FIG. 3, will produce a half-tone transparency film having one-fourth of the data dots for the image, with the light passing through clear areas 114.
  • the screen 104 may remain in the apparatus shown in FIG. 3, but it is indexed in a manner similar to the indexing of template 84 of FIG. 11, to enable the clear areas 114 of the screen 104 to become aligned with what would be the cavity location areas marked 2 in FIG. 9, and the negative 34 for the second image would be exposed (in FIG. 3) to produce a composite half-tone transparency film 44 which has the data dots for the first and second images in their designated places. This process chined to produce the cavities in the cavity plate.
  • the ionizable gas used in the cavities is a mixture of 99.7 percent Neon, 0.2 percent Nitrogen, and 0.1 percent Argon, with the cavities being filled to a gas pressure of approximately l60 Torr.
  • the energizing voltage used to energize the selected connection terminals was approximately 240 volts A.C., consisting of pulses from 2 to 6 microseconds wide and spaced approximately 50 microseconds apart.
  • first and second substrates each having a conductor means thereon, with the conductor means on said second substrate being transparent;
  • said first and second substrates being assembled with said conductor means on said second substrate and said layer of glass having said cavity pattern therein facing each other;
  • connection terminals connected to each of said conductor means.
  • each said cavity being formed being located in one of said cavity location areas so that the cavities for any one image are regularly located in periodicallyspaced columns and rows of said cavity location areas;
  • said cavities are formed by producing posts at said cavity location areas, with said posts having varying diameters corresponding to the data dots for the associated fixed 15 16 images, and with said cavities being located therelocation areas, with said holes having varying diameters around. corresponding to the data dots for the associated fixed 16.
  • said image is produced by producing posts at said cavity location areas, with said posts having varying diameters corresponding to the data dots for the associated fixed 15 16 images, and with said cavities being located therelocation areas, with said holes having varying diameters around. corresponding to the data dots for the associated fixed 16.
  • cavities are formed by producing holes at said cavity V UNITED STATES PATENT OFFICE D CERTIFICATE OF CORRECTION Patent No. 3,801,852 Dated April 2. 1974 Inventorfi) John L. Janning It is certified that error. appers in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
US00318369A 1972-12-26 1972-12-26 Picture producing plasma display device and method of making it Expired - Lifetime US3801852A (en)

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US31836972A 1972-12-26 1972-12-26

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US (1) US3801852A (enrdf_load_stackoverflow)
JP (1) JPS4991577A (enrdf_load_stackoverflow)
CA (1) CA993540A (enrdf_load_stackoverflow)
DE (1) DE2362484A1 (enrdf_load_stackoverflow)
GB (1) GB1410866A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0971384A1 (en) * 1998-06-08 2000-01-12 Ngk Insulators, Ltd. Plasma panel display and method for producing the same
US20040104666A1 (en) * 2002-11-28 2004-06-03 Pioneer Corporation Display panel, method of manufacturing the display panel, and partition wall used in the display panel
WO2011068762A1 (en) 2009-12-01 2011-06-09 Integenx Inc. Composite plastic articles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3016808A1 (de) * 1980-05-02 1981-11-12 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Gasentladungsanzeigebildschirm

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509407A (en) * 1967-09-15 1970-04-28 Burroughs Corp Display panel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3602754A (en) * 1969-04-28 1971-08-31 Owens Illinois Inc Capillary tube gas discharge display panels and devices

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509407A (en) * 1967-09-15 1970-04-28 Burroughs Corp Display panel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0971384A1 (en) * 1998-06-08 2000-01-12 Ngk Insulators, Ltd. Plasma panel display and method for producing the same
US6310441B1 (en) 1998-06-08 2001-10-30 Ngk Insulators, Ltd. Display and method for producing the same
US20040104666A1 (en) * 2002-11-28 2004-06-03 Pioneer Corporation Display panel, method of manufacturing the display panel, and partition wall used in the display panel
US7091663B2 (en) * 2002-11-28 2006-08-15 Pioneer Corporation Display panel, method of manufacturing the display panel, and partition wall used in the display panel
WO2011068762A1 (en) 2009-12-01 2011-06-09 Integenx Inc. Composite plastic articles

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CA993540A (en) 1976-07-20
DE2362484A1 (de) 1974-07-11
JPS4991577A (enrdf_load_stackoverflow) 1974-09-02
GB1410866A (en) 1975-10-22

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