Patents by Inventor Yoon Chang Choi

Yoon Chang Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8044886
    Abstract: The present invention relates to a plasma display apparatus and, more particularly, to a method of driving a plasma display panel. The plasma display apparatus includes a plasma display panel including a plurality of scan electrodes and sustain electrodes formed on an upper substrate, and a plurality of address electrodes formed on a lower substrate, and a driver for supplying driving signals to the plurality of electrodes. The plurality of scan electrodes are divided into first and second groups and then supplied with scan signals, and scan bias voltages supplied to the first and second groups in at least any one period of an address period are different from each other. In at least one of a plurality of subfields constituting one frame, a width of a first sustain signal of a plurality of sustain signals supplied during a sustain period is larger than a width of each of the remaining sustain signals.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: October 25, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yoon Chang Choi, Dong Soo Lee, Byoung Gun Kim, Seong Ho Kang, Kyung Ryeol Shim
  • Patent number: 8044887
    Abstract: The present invention relates to a method of driving a plasma display panel and a plasma display apparatus employing the same. In the plasma display apparatus, a plurality of scan electrodes formed in a plasma display panel are divided into first and second groups and then supplied with scan signals. When a scan bias voltage supplied in a first subfield of first and second subfields is higher than that supplied in a second subfield of the first and second subfields, a lowest voltage of a reset signal supplied in the second subfield is higher than that supplied in the first subfield. In accordance with the plasma display apparatus of the present invention, the lowest voltage of the reset signal is controlled according to the scan bias voltage in dividing the plurality of scan electrodes into two or more groups and driving them.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: October 25, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yoon Chang Choi, Won Jae Kim, Hyung Jae Kim, Seong Ho Kang, Kyung Ryeol Shim
  • Publication number: 20100302224
    Abstract: A plasma display device is provided. In the plasma display device, a plurality of scan electrodes are divided into one or more scan electrode groups, and different driving signals are applied to the scan electrode groups. More specifically, a minimum voltage detected during a set-down period of a reset period is made to be discrepant from a scan voltage, thereby reducing the amount by which wall charge is erased and stabilizing an address discharge. In addition, different driving signals are applied to a plurality of scan electrodes, and thus, it is possible to stabilize an address discharge even in scan electrodes to which a scan signal is applied late.
    Type: Application
    Filed: April 12, 2008
    Publication date: December 2, 2010
    Applicant: LG ELECTRONICS INC.
    Inventors: Yoon Chang Choi, Byung Goo Kong, Dong Soo Lee, Seong Ho Kang
  • Publication number: 20100265240
    Abstract: A plasma display device is provided. The plasma display device includes a plasma display panel (PDP) which has an upper substrate, a lower substrate, a plurality of scan electrodes and a plurality of sustain electrodes that are disposed on the upper substrate, and a plurality of address electrodes that are disposed on the lower substrate; and a driving unit which applies driving signals to the scan electrodes, the sustain electrodes and the address electrodes. The driving unit drives the scan electrodes in units of scan electrode groups during an address period, and applies different voltages to the scan electrodes, thereby enabling an address discharge to be stably performed.
    Type: Application
    Filed: April 12, 2008
    Publication date: October 21, 2010
    Applicant: LG ELECTRONICS INC.
    Inventors: Yoon Chang Choi, Byoung Gun Kim, Dong Soo Lee, Hyung Jae Kim, Won Jae Kim
  • Patent number: 7812788
    Abstract: The present invention relates to a plasma display panel, in particular to a plasma display apparatus and driving method of same, wherein the bightness of sustain light generated by a sustain pulse by performing floating either a scan electrode or a sustain electrode during a sustain period, thereby increasing the driving efficiency of the plasma display apparatus. A plasma display apparatus according to an aspect of the present invention comprises a plasma display panel comprising a first electrode and a second electrode; and a controller for applying an auxiliary discharge pulse to the second electrode, when a sustain pulse is applied to the first electrode, during a sustain period.
    Type: Grant
    Filed: January 3, 2006
    Date of Patent: October 12, 2010
    Assignee: LG Electronics Inc.
    Inventors: Kyoung Jin Jung, Ki Duck Cho, Yoon Chang Choi, Min Soo Kim
  • Publication number: 20100238152
    Abstract: A method of driving a plasma display panel (PDP) and a plasma display device using the same are provided. In the plasma display device, a plurality of scan electrodes formed on the PDP are divided into first and second groups to supply scan signals. When a scan bias voltage is higher in a first subfield in first and second subfields, lowermost voltages of reset signals are higher in the second subfield. According to the plasma display device, when the plurality of scan electrodes are divided into at least two groups to be driven, the lowermost voltages of the reset signals are controlled in accordance with a scan bias voltage so that it is possible to reduce address erroneous discharge in accordance with the loss of wall charges, to prevent the generation of brilliant points, and to improve the picture quality of a displayed image.
    Type: Application
    Filed: March 6, 2008
    Publication date: September 23, 2010
    Applicant: LG ELECTRONICS INC.
    Inventors: Yoon Chang Choi, Byoung Gun Kim, Dong Soo Lee, Seong Ho Kang, Kyung Ryeol Shim
  • Publication number: 20100238155
    Abstract: A plasma display device is provided. In the plasma display device, a plurality of scan electrodes are divided into one or more scan electrode groups, and different driving signals are applied to the scan electrode groups. More specifically, different scan bias voltages are applied to the scan electrodes during a scan period, and different signals are applied to the scan electrodes during a set-down period of a reset period. Therefore, it is possible to stabilize an address discharge in scan electrodes to which scan signals are applied late.
    Type: Application
    Filed: April 12, 2008
    Publication date: September 23, 2010
    Applicant: LG ELECTRONICS INC.
    Inventors: Yoon Chang Choi, Chi Yun OK, Dong Soo Lee, Seong Ho Kang
  • Patent number: 7561122
    Abstract: The present invention is related to a plasma display panel, in particular to a plasma display apparatus capable of preventing an error discharge or an error writing of a discharge cell. A plasma display apparatus according to an embodiment of the present invention comprises a plasma display panel including a scan electrode and a sustain electrode; and a controller for applying a negative waveform and a positive waveform to the scan electrode between a reset pulse and a scan pulse having negative polarity, wherein the controller applies a sustain bias voltage to the sustain electrode when the negative waveform is applied to the scan electrode.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: July 14, 2009
    Assignee: LG Electronics Inc
    Inventors: Yoon Chang Choi, Bum Joo Lee
  • Publication number: 20090115696
    Abstract: The present invention relates to a method of driving a plasma display panel and a plasma display apparatus employing the same. In the plasma display apparatus, a plurality of scan electrodes formed in a plasma display panel are divided into first and second groups and then supplied with scan signals. When a scan bias voltage supplied in a first subfield of first and second subfields is higher than that supplied in a second subfield of the first and second subfields, a lowest voltage of a reset signal supplied in the second subfield is higher than that supplied in the first subfield. In accordance with the plasma display apparatus of the present invention, the lowest voltage of the reset signal is controlled according to the scan bias voltage in dividing the plurality of scan electrodes into two or more groups and driving them.
    Type: Application
    Filed: April 10, 2008
    Publication date: May 7, 2009
    Inventors: Yoon Chang CHOI, Won Jae KIM, Hyung Jae KIM, Seong Ho KANG, Kyung Ryeol SHIM
  • Publication number: 20090115338
    Abstract: The present invention relates to a plasma display apparatus and, more particularly, to a method of driving a plasma display panel. A plasma display apparatus according to an aspect of the present invention includes a plasma display panel including a plurality of scan electrodes and sustain electrodes formed on an upper substrate, and a plurality of address electrodes formed on a lower substrate; a driver for supplying driving signals to the plurality of electrodes; and a fluorescent layer, comprising a fluorescent material, and a conductive material having conductivity higher than that of the fluorescent material, is formed on the lower substrate. The plurality of scan electrodes may be divided into first and second groups and then supplied with scan signals, and scan bias voltages supplied to the first and second groups in at least any one period of an address period may be different from each other.
    Type: Application
    Filed: February 14, 2008
    Publication date: May 7, 2009
    Inventors: Yoon Chang Choi, Sung Jin Park, Chi Yun Ok, Seong Ho Kang, Kyung Ryeol Shim
  • Publication number: 20090115695
    Abstract: The present invention relates to a plasma display apparatus. The plasma display apparatus includes a first layer and a second layer over an upper substrate of a plasma display panel. The first layer emits light having a peak at a first wavelength region with light emitted from a discharge space. The second layer emits light having a peak at a second wavelength region lower than the first wavelength region with light emitted from a discharge space. The first layer and the second layer are disposed over a dielectric layer of the upper substrate. The plurality of scan electrodes are divided into first and second groups and then supplied with scan signals, cycles of scan signals supplied in first and second subfields of a plurality of subfields constituting one frame are identical to each other, and scan bias voltages supplied to the first and second groups in at least any one period of an address period are different from each other.
    Type: Application
    Filed: February 15, 2008
    Publication date: May 7, 2009
    Inventors: Dong Soo Lee, Kyung Ryeol Shim, Yoon Chang Choi, Chi Yun Ok, Seong Ho Kang
  • Publication number: 20090115702
    Abstract: The present invention relates to a plasma display apparatus and, more particularly, to a method of driving a plasma display panel. The plasma display apparatus includes a plasma display panel including a plurality of scan electrodes and sustain electrodes formed on an upper substrate, and a plurality of address electrodes formed on a lower substrate, and a driver for supplying driving signals to the plurality of electrodes. The plurality of scan electrodes are divided into first and second groups and then supplied with scan signals, and scan bias voltages supplied to the first and second groups in at least any one period of an address period are different from each other. In at least one of a plurality of subfields constituting one frame, a width of a first sustain signal of a plurality of sustain signals supplied during a sustain period is larger than a width of each of the remaining sustain signals.
    Type: Application
    Filed: April 10, 2008
    Publication date: May 7, 2009
    Inventors: Yoon Chang CHOI, Dong Soo Lee, Byoung Gun Kim, Seong Ho Kang, Kyung Ryeol Shim
  • Publication number: 20090115694
    Abstract: The present invention relates to a plasma display apparatus. The plasma display apparatus includes a first layer and a second layer over an upper substrate of a plasma display panel. The first layer emits light having a peak at a first wavelength region with light emitted from a discharge space. The second layer emits light having a peak at a second wavelength region lower than the first wavelength region with light emitted from a discharge space. The first layer and the second layer are disposed over a dielectric layer of the upper substrate. The plurality of scan electrodes are divided into first and second groups and then supplied with scan signals, and scan bias voltages supplied to the first and second groups in at least one period of an address period are different from each other. Accordingly, the occurrence of address erroneous discharge due to the loss of wall charges can be reduced and the discharge efficiency can be enhanced.
    Type: Application
    Filed: February 15, 2008
    Publication date: May 7, 2009
    Inventors: Won Jae Kim, Kyung Ryeol Shim, Yoon Chang Choi, Chi Yun Ok, Seong Ho Kang
  • Publication number: 20090115693
    Abstract: The present invention relates to a plasma display apparatus. In this plasma display apparatus, a plurality of scan electrodes are divided into first and second groups. An address period includes first and second group scan periods in which scan signals are supplied to the first and second groups, respectively. Scan bias voltages supplied to the first and second groups in at least one of the first and second group scan periods are different from each other. In at least one of a plurality of subfields constituting one frame, a stabilization signal is supplied to at least one of the first and second groups before the scan signal is supplied after a reset signal is supplied. Accordingly, a reduction in the image quality of a display image due to the occurrence of a spot erroneous discharge or address erroneous discharge can be prevented.
    Type: Application
    Filed: February 14, 2008
    Publication date: May 7, 2009
    Inventors: Yoon Chang Choi, Won Jae Kim, Hyung Jae Kim, Seong Ho Kang, Kyung Ryeol Shim
  • Publication number: 20090115701
    Abstract: The present invention relates to a method of driving a plasma display panel and a plasma display apparatus employing the same. A plurality of scan electrodes formed in a plasma display panel may be divided into first and second groups, each of the first and second groups may be divided into a plurality of subgroups and then sequentially supplied with scan signals on a subgroup basis. Scan bias voltages supplied to two or more subgroups belonging to the first group in a first period of the address period may be different from one another, scan bias voltages supplied to two or more subgroups belonging to the second group in a second period of the address period may be different from one another, and scan bias voltages supplied to any one subgroup belonging to the first group and any one subgroup belonging to the second group in a third period of the address period may be different from each other.
    Type: Application
    Filed: February 15, 2008
    Publication date: May 7, 2009
    Inventors: Won Jae KIM, Hyung Jae KIM, Kyung Ryeol SHIM, Yoon Chang CHOI, Seong Ho KANG
  • Publication number: 20090115692
    Abstract: The present invention relates to a plasma display apparatus. In an aspect, the plasma display apparatus includes a plasma display panel including a plurality of scan electrodes and sustain electrodes formed on an upper substrate, and a plurality of address electrodes formed on a lower substrate, and a driver for supplying driving signals to the plurality of electrodes. The plurality of scan electrodes may be divided into first and second groups. An address period may include first and second group scan periods in which scan signals are supplied to the first and second groups, respectively. Scan bias voltages supplied to the first and second groups in at least one of the first and second group scan periods may be different from each other. Time points at which data signals are supplied to first and second of the plurality of address electrodes in at least one of the first and second group scan periods may be different from each other.
    Type: Application
    Filed: February 14, 2008
    Publication date: May 7, 2009
    Inventors: Yoon Chang Choi, Byung Goo Kong, Chi Yun Ok, Byoung Gun Kim, Seong Ho Kang
  • Publication number: 20080231552
    Abstract: A plasma display apparatus includes a plasma display panel (PDP) including a front panel with a plurality of scan electrodes and sustain electrodes formed thereon and a rear panel with a plurality of address electrodes formed thereon and a driving circuit that applies drive signals to the scan, sustain and address electrodes so that driving can be performed by time-division of one frame of an image displayed on the PDP into a plurality of sub-fields. Each sub-field includes reset, address, and sustain periods, and a first signal that gradually falls is applied to the scan electrodes during the address period. In the plasma display apparatus, after a rising signal and a falling signal are applied to the scan electrodes, the first signal is applied before or after the scan signal is applied during the address period, thereby preventing a loss of wall charges and performing stable address discharges and sustain discharges.
    Type: Application
    Filed: January 10, 2008
    Publication date: September 25, 2008
    Inventors: Yoon Chang Choi, Won Jae Kim, Chi Yun Ok, Dong Soo Lee