AC-driven gas discharge display device having plural thin discharge tubes, plural pairs of display electrodes transverse to the thin display tubes and plural signal electrodes transverse to the display electrodes with light-blocking, electrically conductive films between respective pairs of display electrodes
View Patent ↗In an AC-driven gas discharge display device and especially a plasma tube array type, a return path is provided for alternate discharge current flowing between X and Y driver circuits. The AC-driven gas discharge display device comprises a front-side, transparent substrate and a rear-side substrate sandwiching therebetween a plurality of thin discharge tubes arranged side by side; a plurality of pairs of display electrodes on an inner surface of the front-side substrate; and a plurality of address electrodes, in a direction transverse to the plurality of display electrodes, the rear-side substrate on an inner surface. Striped light-blocking, electrically conductive films are disposed on an outer surface of the front-side substrate at locations between respective ones of the pairs of display electrodes and coupled at their opposite ends to respective points of a common reference potential in the X- and Y-electrode driver circuits, respectively, to provide a return path for alternate discharge current.
1. An AC-driven gas discharge display device, comprising:
a front-side, transparent substrate and a rear-side substrate sandwiching therebetween a plurality of thin discharge tubes arranged side by side, said front-side substrate having, on an inner surface thereof, a plurality of pairs of display electrodes extending in a direction transverse to said thin discharge tubes, said rear-side substrate having, on an inner surface thereof, a plurality of signal electrodes extending along a length of said thin discharge tubes in a direction transverse to said plurality of display electrodes; and
light-blocking, electrically conductive films on an outer surface of said front-side substrate at locations between respective ones of said pairs of display electrodes, said light-blocking, electrically conductive films being formed of black, electrically conductive material as stripes disposed between respective, adjacent ones of the pairs of display electrodes with respective, opposite ends thereof connected together.
2. An AC-driven gas discharge display device according to claim 1 , further comprising:
corresponding ones of the display electrodes, forming said plurality of pairs of display electrodes, being led out to one edge of said front-side substrate and connected to one driver circuit and the other display electrodes being led out to the other edge of said front-side substrate and connected to the other driver circuit; and
points of reference potential in said one and the other driver circuits being connected together via said light-blocking, electrically conductive films.
3. An AC-driven gas discharge display device according to claim 1 , further comprising:
corresponding ones of the display electrodes, forming said plurality of pairs of display electrodes, being led out to one edge of said front-side substrate and connected to one driver circuit, the other display electrodes being led out to the other edge of said front-side substrate and connected to the other driver circuit; and
points of reference potential in said one and the other driver circuits being connected together via said light-blocking, electrically conductive films.
4. An AC-driven gas discharge display device according to claim 2 , further comprising:
said points of reference potential being points of ground potential; and
said light-blocking, electrically conductive films providing a return path for current flowing between the pairs of display electrodes.
5. An AC-driven gas discharge display device according to claim 3 , further comprising:
said points of reference potential being points of ground potential; and
said light-blocking, electrically conductive films providing a return path for current flowing between the pairs of display electrodes.
6. An AC-driven gas discharge display device, comprising:
a transparent front-side electrode supporting substrate having, on an inner surface thereof, a plurality of pairs of display electrodes substantially in parallel with each other and defining rows of a display screen; and
electrically conductive, light-blocking films on an outer surface of said front-side electrodes at locations between adjacent ones of said pairs of respective display electrodes, said electrically conductive, light-blocking films being formed of black, electrically conductive material as stripes disposed between respective, adjacent ones of the pairs of display electrodes, with respective, opposite ends thereof connected together.