# US 7,015,645 B2 · Plasma display panel having dummy barrier ribs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,015,645 B2 - Document ID: US7015645B2 - Status: Granted - Kind: B2 - Application number: 10/654,194 - Filed: 2003-09-03 - Published: 2004-04-22 - Granted: 2006-03-21 - Earliest claimed: 2002-09-04 - Assignees: Samsung SDI Co., Ltd. - Inventors: Woo-Tae Kim; Eun-Gi Heo - Web page: https://patentgrep.com/patent/US7015645B2 ## CPC - H01J 11/12: with main electrodes provided on both sides of the discharge space - H01J 11/36: Spacers, barriers, ribs, partitions or the like - H01J 2211/368: Dummy spacers, e.g. in a non display region - H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H) ## Abstract A plasma display panel includes first and second substrates that are substantially parallel to each other with a predetermined gap therebetween. The substrates include a display region and a non-display region. Barrier ribs are mounted between the first and second substrates within the display region and define discharge cells. The barrier ribs include an outermost barrier rib located at an edge of the display region. Dummy barrier ribs are mounted between the first and second substrates within the non-display region. The dummy barrier ribs include a first sub barrier rib disposed at a predetermined distance from the outermost barrier rib, and at least one second sub barrier rib connected to the first sub barrier rib and the outermost barrier rib. ## Claims ### Claim 1 A plasma display panel, comprising: first and second substrates that are substantially parallel to each other with a predetermined gap therebetween, said substrates comprising a display region and a non-display region; a plurality of address electrodes formed on the first substrate; a first dielectric layer formed on the first substrate, the first dielectric layer covering the plurality of address electrodes; a plurality of barrier ribs mounted between the first and second substrates within the display region, the plurality of barrier ribs defining discharge cells and including an outermost barrier rib located at an edge of the display region; dummy barrier ribs mounted between the first and second substrates within the non-display region, the dummy barrier ribs comprising: a first sub barrier rib disposed at a predetermined distance from the outermost barrier rib; and at least one second sub barrier rib connected to the first sub barrier rib and the outermost barrier rib; a phosphor layer formed within the discharge cells; a plurality of sustain electrodes formed on a surface of the second substrate that faces the first substrate; a second dielectric layer formed on the surface of the second substrate, said second dielectric layer covering the plurality of sustain electrodes; and discharge gas provided in the discharge cells. ### Claim 2 (depends on 1) The plasma display panel of claim 1, wherein the first sub barrier rib has a width that is substantially identical to a width of one of the plurality of barrier ribs. ### Claim 3 (depends on 1) The plasma display panel of claim 1, wherein the first sub barrier rib is substantially parallel to the plurality of barrier ribs, and the at least one second sub barrier rib is substantially orthogonal to the first sub barrier rib and the outermost barrier rib. ### Claim 4 (depends on 1) The plasma display panel of claim 1, wherein the plurality of sustain electrodes include pairs of sustain electrodes, each pair corresponding to a row of the discharge cells, and the at least one second sub barrier rib is disposed between at least one of the pairs of the sustain electrodes. ### Claim 5 (depends on 4) The plasma display panel of claim 4, wherein the at least one second sub barrier rib comprises one second sub barrier rib that is disposed between one of the pairs of sustain electrodes. ### Claim 6 (depends on 4) The plasma display panel of claim 4, wherein one of the at least one second sub barrier rib is disposed between each pair of sustain electrodes. ### Claim 7 (depends on 4) The plasma display panel of claim 4, wherein one of the at least one second sub barrier rib is selectively disposed between at least one of the pairs of sustain electrodes. ### Claim 8 (depends on 1) The plasma display panel of claim 1, wherein the plurality of barrier ribs are formed in a lattice pattern. ### Claim 9 (depends on 1) The plasma display panel of claim 1, wherein the plurality of barrier ribs are formed in a striped pattern. ### Claim 10 (depends on 1) The plasma display panel of claim 1, wherein the first sub barrier rib is formed in a striped pattern. ### Claim 11 (depends on 1) The plasma display panel of claim 1, wherein the plurality of barrier ribs includes a secondary outermost barrier rib connected to the outermost barrier rib and forming a discharge cell with at least one other of the plurality of barrier ribs. ### Claim 12 (depends on 10) The plasma display panel of claim 10, wherein a distance between the outermost barrier rib and the secondary outermost barrier rib is less than a distance between others of the plurality of barrier ribs. ### Claim 13 A plasma display panel comprising: first and second substrates that are substantially parallel to each other with a predetermined gap therebetween, said substrates comprising a display region and a non-display region; a plurality of barrier ribs mounted between the first and second substrates within the display region, the plurality of barrier ribs defining discharge cells and including an outermost barrier rib located at an edge of the display region; and dummy barrier ribs mounted between the first and second substrates within the non-display region, the dummy barrier ribs comprising: a first sub barrier rib disposed at a predetermined distance from the outermost barrier rib, the first sub barrier rib being substantially parallel to the plurality of barrier ribs; and at least one second sub barrier rib connected to the first sub barrier rib and the outermost barrier rib. ### Claim 14 (depends on 13) The plasma display panel of claim 13, wherein the first sub barrier rib has a width that is substantially identical to a width of one of the plurality of barrier ribs. ### Claim 15 (depends on 13) The plasma display panel of claim 13, further comprising a plurality of sustain electrodes formed on a surface of the second substrate that faces the first substrate, the plurality of sustain electrodes including pairs of sustain electrodes, each pair corresponding to a row of the discharge cells, wherein the at least one second sub barrier rib is mounted between at least one of the pairs of sustain electrodes. ### Claim 16 (depends on 13) The plasma display panel of claim 13, wherein the plurality of barrier ribs are formed in a lattice pattern. ### Claim 17 (depends on 13) The plasma display panel of claim 13, wherein the plurality of barrier ribs and the first sub barrier rib are formed in a striped pattern. ### Claim 18 (depends on 13) The plasma display panel of claim 13, wherein the plurality of barrier ribs include a secondary outermost barrier rib connected to the outermost barrier rib and forming a discharge cell with at least one other of the plurality of barrier ribs. ### Claim 19 (depends on 18) The plasma display panel of claim 18, wherein a distance: between the outermost barrier rib and the secondary outermost barrier rib is less than a distance between others of the plurality of barrier ribs. ### Claim 20 (depends on 13) The plasma display panel of claim 13, wherein the at least one second sub barrier rib is substantially orthogonal to the first sub barrier rib and the outermost barrier rib. ### Claim 21 (depends on 13) The plasma display panel of claim 13, wherein the at least one second sub barrier rib has a height that is substantially identical to a height of the first sub barrier rib.