Low voltage gas discharge display
阅读：541发布：2023-09-05
专利汇可以提供Low voltage gas discharge display专利检索，专利查询，专利分析的服务。并且A low voltage gas discharge display device, the individual cells of which are addressable by half-select pulses applied to selected control and collector electrodes. In the ''''off'''' or standby state, low glow discharge occurs between an anode and a cathode which are electrically common to all of the cells. Control electrode lines, associated with rows of cells, are biased to create a current impeding ion sheath across the respective cell holes therethrough to the positively biased collector electrode lines associated with columns of cells. Halfselect pulses applied to a control and collector electrode line act to reduce the ion sheath across the hole at the interselection thereof and initiate positive column glow discharge therethrough.，下面是Low voltage gas discharge display专利的具体信息内容。
1. A gas discharge display device comprising a gas filled envelope with a transparent display surface and having included therein: first conductive plate member means which acts to form an area electrode and provide a cathode for each of the respective cells of an array of gas discharge cells; a layer of insulation means in contact with said first conductive plate member means and having an array of holes therethrough which respectively act to delineate each of the cathodes of the respective cells of said array of cells; second conductive plate member means separated from said first conductive plate member means by said layer of insulation means and having an array of holes therethrough corresponding to said array of cells with the walls of the respective holes of said array of holes forming respective anode surfaces for said array of cells and with respective ones of said holes forming said anode surfaces arranged to communicate through said holes in said layer of insulation to the respective cathodes of said first conductive plate member means; conductive control electrode strips separate from one another and insulatably mounted over each of the respective rows of holes in said array of holes of said second conductive plate member means with each of said conductive control electrode strips having apertures therethrough at positions corresponding to each of said holes of said array of holes so as to form a row of apertures along the length of each said strips and columns of apertures across said strips; transparent conductive collector electrode strips separate from one another and insulatably mounted adjacent said display surface over each of said respective columns of apertures across said conductive control electrode strips; means to apply a potential to bias said first conductive plate member means negatively with respect to said second conductive plate member means so as to maintain a stable low glow DC discharge state in each cell; means to apply a potential to bias each of said collector electrode strips positively; means to apply a potential to bias each of said control electrode strips negatively so as to create an ion sheath across each of said apertures sufficient to prevent electrons from passing there through to said positively biased collector electrode strips; and means to apply pulses to selected ones of respective control and collector electrode strips so that the cell at the interseciton of the selected one of said control and collector electrode strips has both the ion sheath across the aperture thereof reduced and the potential at the collector electrode adjacent thereto increased so as to thereby allow electrons to penetrate through the said aperture thereof to said collector electrode and establish a stable high intensity positive column glow discharge therein visible through said transparent collector electrode.
2. The device as set forth in claim 1 wherein the area of the aperture openings is small compared to the area of the hole openings in said second conductive plate member means.
3. The device as set forth in claim 2 wherein said second conductive plate member means is substantially at ground potential and said collector electrode strips are biased at approximately 50 volts.
4. The device as set forth in claim 3 wherein the respective apertures in said control electrode strips for each of the respective cells are off-set from the corresponding holes in said layer of insulation means for each of the respective cells and said control electrode strips are opaque.
5. The device as set forth in claim 4 wherein said transparent collector electrode strips are made of an oxide of metal.
6. The device as set forth in claim 5 wherein said metal is taken from the group consisting of Sn and In.
7. The device as set forth in claim 5 wherein the gas in said envelope includes helium, said first and said second conductive members are made of molybdenum and said opaque control electrode strips are made of tungsten.
8. The device as set forth in claim 7 wherein half-select pulses of approximately 10 volts each applied to respective ones of said control and collector electrode strips act to switch discharge in the cell at the intersection thereof from the stable low glow DC discharge state between the anode and cathode thereof to said stable high intensity positive column glow discharge state through the aperature thereof between said cathode and the pulsed collector electrode strip.
9. A gas discharge display device comprising an envelope filled with gas capable of supporting glow discharge and having at least one surface thereof which is transparent so as to provide a display surface whereby selected ones of local regions of a plurality of regions within said envelope made to glow may be displayed therethrough, the improvement comprising: first electrode means mounted within said envelope, said first electrode means including a first plurality of electrode areas electrically coupled to one another; second electrode means mounted within said envelope adjacent said first electrode means, said second electrode means including a second plurality of electrode areas respective ones of which are adjacent to and separate from respective ones of said first plurality of electrode areas such that upon application of a potential thereacross gas present between respective ones of said first and second electrode areas may be caused to undergo a first stable low glow discharge condition; collector electrode means interposing said second electrode means and said display surface within said envelope and mounted adjacent to and separate from each of the respective ones of said second plurality of electrode areas such that upon application of a potential of sufficient magnitude thereto gas present therebetween may be caused to undergo a second stable high glow discharge condition; control electrode means interposing each of the respective ones of said second plurality of electrode areas and said collector electrode means and arranged so that a sufficient potential applied thereto causes a current impeding ion sheath to be formed thereat to thereby control said second stable high glow discharge condition; means to apply a potential between said first and second electrode means so as to cause said first stable low glow discharge condition between each of respective ones of said first and second plurality of electrode areas; means to apply a first control potential to said control electrode means so as to cause a current impeding ion sheath to be formed thereat sufficient when said first stable discharge condition exists to prevent charge flow to said collector electrode means and bring about said second stable discharge condition; and means to apply a collector potential to said collector electrode means which potential is insufficient to cause said second stable discharge condition when said first control potential is applied to said control electrode means but which is sufficient to cause said second stable discharge condition when said first control potential is reduced to provide a second control potential smaller than said first control potential.
10. The display device as set forth in claim 9 wherein said first and second plurality of electrode areas comprise a two dimentional array of rows and columns of said first and second electrode areas.
11. The display device as set forth in claim 10 wherein said collector electrode means mounted adjacent to and separate from each of the respective ones of said second plurality of electrode areas comprises a separate collector electrode for each column of said second electrode areas and wherein said control electrode means interposing each of the respective ones of said second plurality of electrode areas and said collector electrode means comprises a separate control electrode for each row of said second electrode areas.
12. The display device as set forth in claim 11 wherein each of the separate collector electrodes for each column comprises a transparent conductive line and wherein each of the separate control electrodes for each row comprises an opaque conductive line.
13. The display device as set forth in claim 12 wherein said opaque conductive lines each have a row of apertures therethrough along the length of said lines at locations corresponding to the locations of each electrode area in the said rows of said second electrode areas.
14. The display device as set forth in claim 13 wherein said first electrode means comprises a conductive plate with each area of said plurality of electrode areas thereof being delineated by respective ones of a plurality of holes in a layer of insulator in contact therewith and wherein each respective electrode area of said second plurality of electrode areas comprises the inner surface area of a hole in a conductive plate with each hole thereof respectively communicating with corresponding respective ones of said plurality of holes in said layer of insulator and with said conductive plate being held in spaced-apart relationship from said first electrode means by said layer of insulator.
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