# US 7,612,738 B2 · Plasma display device, apparatus for driving the same, and method of driving the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,612,738 B2 - Document ID: US7612738B2 - Status: Granted - Kind: B2 - Application number: 11/692,877 - Filed: 2007-03-28 - Published: 2008-04-17 - Granted: 2009-11-03 - Earliest claimed: 2006-10-13 - Assignees: Samsung SDI Co., Ltd. - Inventors: Hak-Cheol Yang; Joon-Yeon Kim; Jong-Ki Choi; Hyun-Gu Heo; Yong-Jin Jeong; Suk-Chin Sakong; Sung-Soo Hong; Chung-Wook Roh; Sang-Kyoo Han; Won-Seok Nam; Yon-Goo Park - Web page: https://patentgrep.com/patent/US7612738B2 ## CPC - G09G 3/2965: {using inductors for energy recovery} - G09G 3/294: for lighting or sustain discharge - G09G 2310/065: Waveforms comprising zero voltage phase or pause - G09G 2310/066: Waveforms comprising a gently increasing or decreasing portion, e.g. ramp - G09G 2330/021: Power management, e.g. power saving - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A plasma display device includes first to fourth transistors and a plurality of first electrodes. A first terminal of a first capacitor is connected to a power supply supplying a voltage. A second terminal of a second capacitor connected to a second terminal of the first capacitor is connected to a ground terminal. A first diode is connected to the first electrodes through a first inductor and a fifth transistor, which forms a voltage rising path. A second diode is connected to the first electrodes through a second inductor and a sixth transistor, which forms a voltage falling path. A third diode is connected to the third transistor and the second diode, which forms a voltage sustaining path during a voltage rising period. A fourth diode is connected to the second transistor and the first diode, which forms a voltage sustaining path of a voltage falling period. ## Claims ### Claim 1 A plasma display device comprising: a plurality of first electrodes; a first transistor having a first terminal electrically connected to a first power supply for supplying a first voltage; a second transistor having a first terminal electrically connected to a second terminal of the first transistor and a second terminal electrically connected to the plurality of first electrodes; a third transistor having a first terminal electrically connected to the plurality of first electrodes; a fourth transistor having a first terminal electrically connected to a second terminal of the third transistor and a second terminal electrically connected to a second power supply for supplying a second voltage; a first capacitor configured to be charged with a third voltage, the first capacitor having a first terminal connected to the first power supply; a second capacitor configured to be charged with a fourth voltage, the second capacitor having a first terminal connected to a second terminal of the first capacitor and a second terminal electrically connected to the second power supply; a charge path including a first inductor electrically connected between the plurality of first electrodes and a node corresponding to a contact point between the first capacitor and the second capacitor, the charge path being adapted to increase a voltage of the plurality of first electrodes; a charge voltage sustaining path electrically connected between the second terminal of the third transistor and the node, the charge voltage sustaining path being adapted to sustain the voltage of the plurality of first electrodes at a fifth voltage; a discharge path including a second inductor electrically connected between the plurality of first electrodes and the node, the discharge path being adapted to decrease the voltage of the plurality of first electrodes; and a discharge voltage sustaining path electrically connected between the node and the first terminal of the second transistor, the discharge voltage sustaining path being adapted to sustain the voltage of the plurality of first electrodes at a sixth voltage. ### Claim 2 (depends on 1) The plasma display device of claim 1, wherein: the charge voltage sustaining path comprises a first diode having an anode electrically connected to the second terminal of the third transistor and a cathode electrically connected to the node; and the discharge voltage sustaining path comprises a second diode having an anode electrically connected to the node and a cathode electrically connected to the first terminal of the second transistor. ### Claim 3 (depends on 2) The plasma display device of claim 2, wherein: the charge voltage sustaining path further comprises a fifth transistor electrically connected between the first terminal of the first inductor and the plurality of first electrodes; and the discharge voltage sustaining path further comprises a sixth transistor electrically connected between the first terminal of the second inductor and the plurality of first electrodes. ### Claim 4 (depends on 3) The plasma display device of claim 3, wherein: the charge voltage sustaining path further comprises a third diode having an anode electrically connected to the node and a cathode electrically connected to the second terminal of the first inductor; and the discharge voltage sustaining path further comprises a fourth diode having a cathode electrically connected to the node and an anode electrically connected to the second terminal of the second inductor. ### Claim 5 (depends on 2) The plasma display device of claim 2, wherein: the charge voltage sustaining path further comprises a fifth transistor electrically connected between the first terminal of the first inductor and the node; and the discharge voltage sustaining path further comprises a sixth transistor electrically connected between the first terminal of the second inductor and the node. ### Claim 6 (depends on 5) The plasma display device of claim 5, wherein: the charge voltage sustaining path further comprises a third diode having an anode electrically connected to the second terminal of the first inductor and a cathode electrically connected to the plurality of first electrodes; and the discharge voltage sustaining path further comprises a fourth diode having an anode electrically connected to the plurality of first electrodes and a cathode electrically connected to the second terminal of the second inductor. ### Claim 7 (depends on 5) The plasma display device of claim 5, further comprising: a fifth diode having a cathode connected to the first terminal of the first inductor and an anode electrically connected to the second power supply; a sixth diode having a cathode connected to the second terminal of the first inductor and an anode electrically connected to the second power supply; a seventh diode having an anode connected to the first terminal of the second inductor and a cathode electrically connected to the first power supply; and an eighth diode having an anode connected to the second terminal of the second inductor and a cathode electrically connected to the first power supply. ### Claim 8 (depends on 3, 4, 5, 6, 7) The plasma display device of any one of claims 3 to 7, further comprising: a controller adapted to turn on the third and fifth transistors during a first period, to turn on the second, third, and fifth transistors during a second period, to turn on the second and fifth transistors during a third period, to turn on the first and second transistors during a fourth period, to turn on the second and sixth transistors during a fifth period, to turn on the second, third, and sixth transistors during a sixth period, to turn on the third and sixth transistors during a seventh period, and to turn on the third and fourth transistors during an eighth period. ### Claim 9 (depends on 1) The plasma display device of claim 1, wherein the third voltage and the fourth voltage are the same, and correspond to half of the difference between the first voltage and the second voltage. ### Claim 10 (depends on 1) The plasma display device of claim 1, wherein the fifth voltage is the same as the sixth voltage. ### Claim 11 (depends on 1, 2, 3, 4, 5, 6, 7) The plasma display device of any one of claims 1 to 7, where the second voltage is a ground voltage, and the first voltage is a positive voltage. ### Claim 12 (depends on 1, 2, 3, 4, 5, 6, 7) The plasma display device of any one of claims 1 to 7, wherein the first voltage is a ground voltage, and the second voltage is a negative voltage. ### Claim 13 An apparatus for driving a plasma display device comprising first electrodes and second electrodes, the apparatus comprising: a plurality of first transistors electrically connected between a first power supply for supplying a first voltage and the first electrodes; a plurality of second transistors electrically connected between a second power supply for supplying a second voltage and the first electrodes; a first capacitor adapted to be charged with a third voltage, the first capacitor having a first terminal connected to the first power supply; a second capacitor adapted to be charged with a fourth voltage, the second capacitor having a first terminal connected to a second terminal of the first capacitor and a second terminal electrically connected to the second power supply; a first resonance path adapted to increase a voltage of the first electrode using resonance between a first inductor electrically connected between the first electrodes and a node corresponding to a contact point between the first capacitor and the second capacitor, and a panel capacitor formed at the first electrodes; a first voltage sustaining path comprising a switch adapted to electrically connect a first contact point of contact points among the plurality of second transistors, and the node; a second resonance path adapted to decrease the voltage of the first electrodes using resonance between the panel capacitor formed at the first electrodes, and a second inductor electrically connected between the first electrodes and the node; and a second voltage sustaining path comprising a switch adapted to electrically connect a second contact point of contact points among the plurality of first transistors and the node. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein: the first resonance path further comprises a fifth transistor connected between the node and the plurality of first electrodes; and the second resonance path further includes a sixth transistor connected between the plurality of first electrodes and the node. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein in a state where a third transistor is turned on and the fourth voltage is applied to the second terminal of the second capacitor, the voltage of the first electrode is increased through the first resonance path; in a state where the fourth voltage is applied to the second terminal of the second capacitor, the fourth voltage is applied through the first voltage sustaining path; in a state where the fourth voltage is applied to the second terminal of the second capacitor, the third transistor is turned off, the second transistor is turned on, and the voltage of the first electrode is increased through the first resonance path; in a state where the fourth voltage is applied to the second capacitor, the first transistor is turned on, and the first voltage is applied to the first electrodes; in a state where the fourth voltage is applied to the second terminal of the second capacitor, the first transistor is turned off, the sixth transistor is turned on, and the voltage of the first electrode is decreased through the second resonance path; in a state where the fourth voltage is applied to the second terminal of the second capacitor, the second transistor is turned off, the third transistor is turned on, and the fourth voltage is applied through the second voltage sustaining path; in a state where the fourth voltage is applied to the second terminal of the second capacitor, the voltage of the first electrode is decreased through the second resonance path; and in a state where the fourth voltage is applied to the second terminal of the second capacitor, a fourth transistor is turned on, and the second voltage is applied to the first electrode. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein when the first voltage is applied to the first electrodes, a backward current is decreased through the first inductor and a body diode of the fifth transistor; and when the second voltage is applied to the first electrodes, a backward current is decreased through the second inductor and a body diode of the sixth transistor.