Resistor-diode Arrangement Patents (Class 345/69)
  • Patent number: 10061499
    Abstract: Systems, methods, and non-transitory computer-readable media can provide an interactive slider element for selecting a time-lapse amount for captured media content. A selection of the time-lapse amount can be received via the interactive slider element. A stabilized time-lapse media content item having the time-lapse amount associated with the selection can be generated based on the captured media content. The stabilized time-lapse media content item can be presented.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: August 28, 2018
    Assignee: Facebook, Inc.
    Inventors: Thomas Frederick Dimson, Alexandre Karpenko
  • Patent number: 9640097
    Abstract: An OLED pixel driving circuit is disclosed. The pixel driving circuit includes a plurality of interlaced scanning and data lines, and a first defect detection unit electrically connected to a first endpoint of at least one of the scanning lines, and the data lines. The first endpoint is located at one end of the at least one scanning line or data line.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: May 2, 2017
    Assignees: SHANGHAI TIANMA AM-OLED CO., LTD., TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventor: Tao Cai
  • Patent number: 8963811
    Abstract: An LED display system comprises an LED array and an LED driver circuit. An LED driver circuit comprises components including a phase lock loop, a pulse width modulation engine, a configuration register, a series of gain adjustable fast charge current sources, and a serial input/output interface. The components in this driver circuit may be integrated on a same chip. The LED array may be arranged in a common cathode configuration.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: February 24, 2015
    Assignee: SCT Technology, Ltd.
    Inventors: Eric Li, Chun Lu, Shahnad Nadershahi, Shang-Kuan Tang
  • Patent number: 8963810
    Abstract: An LED display system comprises an LED array and an LED driver circuit. An LED driver circuit comprises components including a phase lock loop, a pulse width modulation engine, a configuration register, a gain adjustable fast charge current source, and a serial input/output interface. The components in this driver circuit may be integrated on a same chip. The LED array may be arranged in a common cathode configuration.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: February 24, 2015
    Assignee: SCT Technology, Ltd.
    Inventors: Eric Li, Chun Lu, Shahnad Nadershahi, Shang-Kuan Tang
  • Patent number: 8872753
    Abstract: To adjust brightness of at least a portion of a display image, a type of content to be included within the display image is determined and, based on the identified content type, the light source of the display is set to an adjusted intensity. Thereafter, that portion of the display image unrelated to the content requiring adjusted brightness is processed to account for the adjusted intensity of the light source. Because the processing in accordance with the present invention is performed entirely on one or more processors that provide the display images to the display, the present invention overcomes the added complexity and cost associated with prior art techniques, while simultaneously providing the flexibility to quickly adjust display brightness based on types of content being included in the displayed image.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: October 28, 2014
    Assignee: ATI Technologies ULC
    Inventor: David I. J. Glen
  • Patent number: 8836614
    Abstract: The present invention provides a display panel control circuit, including: a voltage adjustment unit including a high side switch coupled between an output terminal and a high voltage source, a low side switch coupled between the output terminal and a low voltage source, and a voltage adjustment switch coupled between the output terminal and a switching node; a direction control unit, including a first diode having a cathode coupled to the switching node and an anode coupled to a voltage rising node, and a second diode having an anode coupled the switching node and a cathode coupled to a voltage falling node; a voltage rising resistor coupled between the voltage rising node and a shaping voltage source; and a voltage falling resistor coupled between the voltage falling node and the shaping voltage source.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: September 16, 2014
    Assignee: Richtek Technology Corporation
    Inventor: Der-Jiunn Wang
  • Patent number: 8711136
    Abstract: The present invention provides a voltage transfer function, a luminance transfer function, and a transfer factors (for example, efficiency, critical point, and slope) between these two functions, derives the correlation (based on the condition change in all cases) between an input grayscale voltage and output luminance, and calibrates the input grayscale voltage by a difference between measurement luminance and target luminance using the transfer functions. Therefore, the present invention can respond to change in conditions for all cases, and increase the accuracy, easiness, and generalization of calibration compared to the existing calibration scheme that relies on the lookup table by checking the actual measurement data and readjusting the transfer factors in each calibration stage. Moreover, the present invention can further increase the manufacturing yield by an average of 35% than the existing yield, significantly saving the manufacturing cost.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: April 29, 2014
    Inventor: Jaeyeol Park
  • Patent number: 8669972
    Abstract: A driving method of a liquid crystal display panel having a source line and a counter electrode, includes driving the counter electrode to a first potential, driving the, counter electrode to a second potential being different from the first potential, setting the counter electrode and the source line to a third potential by short-circuiting the counter electrode and the source line to an interconnection having a potential between the first potential and the second potential, and driving the source line to a potential corresponding to an image data. The setting of the counter electrode and the source line to the third potential occurs in a period of one frame.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 11, 2014
    Assignee: Renesas Electronics Corporation
    Inventor: Hiroaki Shirai
  • Patent number: 8633881
    Abstract: Display driving arrangements including: generation circuit dividing a reference voltage by variable resistors for plural levels of voltages; a decoder circuit decoding gray scale voltage corresponding to the display data among the levels of voltages; and a register setting variable resisters resistance values to adjust amplitude and gradient of the gamma characteristic curve of the gray scale voltages with respect to the gray scale number, the generation circuit having a group of resistive voltage dividing circuits dividing the reference voltage, a variable resister amplitude adjusting the gamma characteristic curve in accordance with register setting values connected with a side of the reference voltage in series, being closer to the side of the reference voltage than the group of resistive voltage dividing circuits, a variable resister to adjust the gradient of the gamma characteristic curve per the register setting values connected within the group of resistive voltage dividing circuits in series.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: January 21, 2014
    Assignee: Renesas Electronics Corporation
    Inventors: Yasuyuki Kudo, Akihito Akai, Kazuo Ookado, Kazunari Kurokawa, Hiroki Aizawa
  • Patent number: 8466853
    Abstract: A driving method of a plasma display device according to an exemplary embodiment groups a plurality of address electrodes extending in a first direction into a plurality of groups, and logically divides each of the groups into a plurality of sub-groups. During a first period, a first pulse is sequentially applied to the plurality of groups, and a second pulse is sequentially applied to the plurality of sub-groups included in at least one of the plurality of groups during a second period following the first period. The first and second periods are address periods for sensing in a second direction crossing the first direction.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: June 18, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Tae-Yong Song, Suk-Jae Park, Woo-Joon Chung
  • Patent number: 8456392
    Abstract: The present invention provides a method of manufacturing an electronic apparatus, such as a lighting device having light emitting diodes (LEDs) or a power generating device having photovoltaic diodes. The exemplary method includes forming at least one first conductor coupled to a base; coupling a plurality of substantially spherical substrate particles to the at least one first conductor; converting the substrate particles into a plurality of substantially spherical diodes; forming at least one second conductor coupled to the substantially spherical diodes; and depositing or attaching a plurality of substantially spherical lenses suspended in a first polymer. The lenses and the suspending polymer have different indices of refraction. In some embodiments, the lenses and diodes have a ratio of mean diameters or lengths between about 10:1 and 2:1. In various embodiments, the forming, coupling and converting steps are performed by or through a printing process.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: June 4, 2013
    Assignees: NthDegree Technologies Worldwide Inc, The United States of America as represented by the National Aeronautics and Space Administration
    Inventors: William Johnstone Ray, Mark D. Lowenthal, Neil O. Shotton, Richard A. Blanchard, Mark Allan Lewandowski, Kirk A. Fuller, Donald Odell Frazier
  • Patent number: 8456393
    Abstract: The present invention provides a method of manufacturing an electronic apparatus, such as a lighting device having light emitting diodes (LEDs) or a power generating device having photovoltaic diodes. The exemplary method includes forming at least one first conductor coupled to a base; coupling a plurality of substrate particles to the at least one first conductor; converting the plurality of substrate particles into a plurality of diodes; forming at least one second conductor coupled to the plurality of spherical diodes; and depositing or attaching a plurality of substantially spherical lenses suspended in a first polymer, with the lenses and the suspending polymer having different indices of refraction. In some embodiments, the lenses and diodes have a ratio of mean diameters or lengths between about 10:1 and 2:1. In various embodiments, the forming, coupling and converting steps are performed by or through a printing process.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: June 4, 2013
    Assignees: NthDegree Technologies Worldwide Inc, The United States of America as represented by the United States National Aeronautics and Space Administration
    Inventors: William Johnstone Ray, Mark D. Lowenthal, Neil O. Shotton, Richard A. Blanchard, Mark Allan Lewandowski, Kirk A. Fuller, Donald Odell Frazier
  • Patent number: 8319705
    Abstract: The plasma display device has a display panel having first and second display electrodes and address electrodes, an electrode drive circuit, and a drive control circuit for controlling the electrode drive circuit. The drive control circuit performs a reset drive control, address drive control and sustain drive control in each subfield. The drive control circuit performs an all cell reset drive control which resets all cells in a first subfield out of the plurality of subfields, and an ON cell reset drive control which resets ON cells in a second subfield. At a first temperature T1, an ultimate potential of an slope pulse of the first display electrode is controlled to be a first potential in the ON cell reset drive control, and at a second temperature T2>T1, the ultimate potential is controlled to be a second potential higher than the first potential.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: November 27, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Junichi Kumagai, Katsumi Ito
  • Patent number: 8294652
    Abstract: A driving method for driving an LCD panel having a counter electrode and a source line. In a first period, the counter electrode is driven to a potential VCOMH. In a second period, the counter electrode and the source line are short-circuited to a power supply interconnection having a power supply potential VCI. In a third period, the counter electrode is connected to a ground interconnection while the source line is kept to be short-circuited to the power supply interconnection. In a fourth period, the counter electrode is pulled down to a potential VCOML lower than a ground potential In a fifth period, the source line is driven to a potential corresponding to an image data while the counter electrode is kept to the potential VCOML. The electric power consumed in pulling down the counter electrode from a positive potential to a negative potential can be effectively reduced.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: October 23, 2012
    Assignee: Renesas Electronics Corporation
    Inventor: Hiroaki Shirai
  • Patent number: 8284123
    Abstract: In one embodiment of the present invention, a liquid crystal display apparatus driving circuit selectively supplies positive polarity gray scale voltages or negative polarity gray scale voltages to video signal lines as video signals. The circuit includes a gray scale voltage generation circuit for generating a gray scale voltage for display; and first and second gray scale voltage adjustment sections included in the circuit, for increasing positive and negative polarity gray scale voltages while maintaining a voltage difference between the positive and negative polarity gray scale voltages and respectively adjust a center potentials of the positive and negative polarity gray scale voltages. This makes it possible to provide the liquid crystal display apparatus driving circuit which can make the center values of the positive and negative polarity gray scale voltages proximate to values which makes it possible to further reduce the flicker phenomenon without changing the gray scale property.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: October 9, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hiroyuki Higashino
  • Patent number: 8264425
    Abstract: A method for compensating data for a data compensating apparatus in a display apparatus includes converting image data of an n-th frame (where “n” is a natural number) into pre-compensation data of the n-th frame having a gray scale less than or equal to a gray scale of the image data of the n-th frame based on pre-compensation data of an (n?1)-th frame, storing the pre-compensation data of the n-th frame, and generating compensation data of the n-th frame having a gray scale greater than or equal to the gray scale of the image data of the n-th frame by using the image data of the n-th frame and the pre-compensation data of the (n?1)-th frame.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: September 11, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Bong-Im Park, Bong-Ju Jun, Jong-Hyon Park, Yun-Jae Kim, Jae-Won Jeong, Woo-Young Lee, Kang-Hyun Kim
  • Patent number: 8207911
    Abstract: A display device includes two or more plasma tube array units to provide a large sized screen. Each plasma tube array unit includes pairs of scan and sustain electrodes. The plasma tube array units are disposed adjacent to each other in a longitudinal direction of the scan and sustain electrodes. One scan driver which selectively applies a scan signal to the scan electrodes is coupled to the two adjacent plasma tube array units at a position between the two adjacent plasma tube array units. Two sustain voltage drivers which apply respective sustain voltage to the sustain electrodes are coupled to the sustain electrodes of the two respective adjacent plasma tube array units on two respective outermost sides of the two respective adjacent plasma tube array units.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: June 26, 2012
    Assignee: Shinoda Plasma Co., Ltd.
    Inventors: Manabu Ishimoto, Hitoshi Hirakawa, Kenji Awamoto
  • Patent number: 8207912
    Abstract: Sustain pulses are alternately applied to a pair of display electrodes of discharge cells provided in a plasma display panel (PDP) to generate a sustain discharge to display an image on the PDP. The sustain pulses include two-crests discharge voltage waveforms having a first maximum and second maximum values, in which discharges are generated twice in a half cycle. After applying a sustain pulse having a one-crest discharge voltage waveform to a pair of display electrodes, a predetermined number of sustain pulses of two-crests discharge voltage waveforms are consecutively applied. A time, from applying a second sustain pulse of a two-crests discharge voltage waveform to clamping a voltage of the second sustain pulse to the second maximum value, is made longer than a time, from applying a first sustain pulse of a two-crests discharge voltage waveform to clamping a voltage of the first sustain pulse to the second maximum value.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: June 26, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Naoki Itokawa, Katsumi Ito, Masaki Kimura, Junichi Kumagai, Yasunobu Hashimoto, Tomokatsu Kishi
  • Patent number: 8203508
    Abstract: A plasma display device includes a plasma display panel having a scan driver including a falling reset signal/scan low signal generating circuit that includes: a first switch coupled to a scan electrode, a second switch coupled in series with the first switch and coupled to a scan low voltage source having a scan low voltage, a first driving circuit having an output terminal coupled to a control terminal of the first switch and a ground terminal coupled to the first and second switches, a second driving circuit having an output terminal coupled to a control terminal of the second switch and a ground terminal coupled to the second switch and the scan low voltage source, a control Zener diode between the control terminals of the first and second switches, and a control resistor between the control terminal of the second switch and the scan low voltage source.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: June 19, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Jinho Yang
  • Patent number: 8115702
    Abstract: A plasma display device and a method of driving the same, capable of reducing or preventing the deterioration of components such as a switching device, due to an overcurrent. In a reset period, in order to cause the voltage of a scan electrode to ramp down from a first voltage to a second voltage, a panel driver includes a falling ramp switch that repeats turn-on/turn-off operations, alternately coupling and de-coupling a low-level power supply to the scan electrode, resulting in a gradually falling ramp waveform. A switch controller generates a switching pulse to control the falling ramp switch. Each turn-on time of the switching pulse for the initial falling ramp waveform following a power-on of the plasma display device is controlled to be shorter than each turn-on time of the switching pulse for other falling ramp waveform.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: February 14, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ito Kazuhiro, Yoo-jin Song, Tae-wook Kim
  • Patent number: 8054248
    Abstract: A driving method of a plasma display panel may be provided such that the plasma display panel may be driven stably under a high temperature environment. The method may include applying a scan pulse to the scan electrode during an address period, applying a first DC voltage to the sustain electrode during the set-down period, applying a second DC voltage to the sustain electrode during the first address period after applying the falling waveform to the scan electrode, and applying a third DC voltage to the sustain electrode during the second address period after applying the second DC voltage to the sustain electrode. A difference between the second DC voltage and a lowest voltage of the scan pulse applied during the first address period is lower than a difference between the third DC voltage and a lowest voltage of the scan pulse applied during the second address period.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: November 8, 2011
    Assignee: LG Electronics Inc.
    Inventors: Moon Shick Chung, Jeong Pil Choi
  • Patent number: 8040296
    Abstract: In one embodiment, a plasma display device includes: a plasma display panel having a plurality of electrodes; a power supply including first and second power sources for respectively supplying first and second voltages, the second voltage being higher than the first voltage; a driving circuit for driving the electrodes; and a controller for generating a first signal to control the driving circuit. The driving circuit includes: a first switch for supplying a third voltage to the electrodes, the third voltage decreasing over a period of time; a switching controller for controlling the first switch in accordance with the first signal and a second signal; and a feedback signal generator for comparing fourth and fifth voltages respectively proportional to the third and second voltages, adjusting a level of the second signal according to a result of comparing the fourth and fifth voltages, and supplying the second signal to the switching controller.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: October 18, 2011
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Sang-Gu Lee
  • Patent number: 8026869
    Abstract: A plasma display driving method and apparatus that can reduce the occurrences of dropout, on a displayed image, caused by misaddress when the environment temperature becomes low. In the inventive plasma display, the environment temperature is determined, and during a charge adjustment interval, the ultimate voltage, which the drive waveform of a scan electrode voltage reaches at the end after continuously varying in the negative direction, is changed in accordance with the determined environment temperature in such a manner that if the environment temperature becomes lower, the ultimate voltage is directed in the positive direction.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: September 27, 2011
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Akihiro Takagi, Takashi Sasaki, Akira Otsuka
  • Patent number: 7969429
    Abstract: The collector, emitter, and base of a bipolar transistor circuit are connected to a high side power supply terminal, the drain of a level shift transistor, and a floating power supply terminal, respectively. When a high side output transistor is on, the floating power supply terminal is at the potential of a high potential power supply terminal. The high side power supply terminal is at a potential higher than the potential of the floating power supply terminal by a constant voltage. Turning the level shift transistor on, its drain potential drops below the potential of the floating power supply terminal; The base current flows through the bipolar transistor circuit and the drain potential of the level shift transistor is clamped near the potential of the floating power supply terminal; The bipolar transistor circuit is turned on and its collector current supplies the drain current of the level shift transistor.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: June 28, 2011
    Assignee: Panasonic Corporation
    Inventors: Masahiko Sasada, Hiroki Matsunaga, Masashi Inao, Hiroshi Ando, Jinsaku Kaneda, Eisaku Maeda, Akihiro Maejima
  • Patent number: 7884783
    Abstract: A data driver including a first digital-to-analog converter configured to select first and second reference voltages depending on upper bits of data and supply the first and the second reference voltages to a first line and a second line, respectively, a second digital-to-analog converter having the first line and the second line to receive the first and the second reference voltages, respectively, a first group of voltage dividing resistors between the first line and the second line and configured to generate a plurality of gray scale voltages, a voltage dividing resistor unit between the first line and the second line, and at least one switch positioned between the voltage dividing resistor unit and one of the first line and the second line, and including a decoder unit configured to control on and off state of the at least one switch depending on lower bits of data.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: February 8, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventor: Sang Moo Choi
  • Patent number: 7872615
    Abstract: An apparatus for driving a plasma display panel includes a first driver and a second driver and a first power supplier and a second power supplier for generating sustain discharge pulses having no negative (?) level. The first driver includes a first capacitor charged to a first voltage and is coupled to a power source for supplying a voltage Vs and a ground voltage. The first driver, coupled to one terminal of a panel capacitor, operates to alternately apply double the voltage Vs formed by the power source and the first capacitor and the ground voltage to the one terminal of the panel capacitor. The second power supplier, coupled to the power source and the ground voltage, includes a second capacitor charged to Vs. The second driver coupled to the other terminal of the panel capacitor operates to alternately apply double the voltage Vs formed by the power source and the second capacitor and the ground voltage to the other terminal of the panel capacitor.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: January 18, 2011
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jun-Young Lee, Dae-Gyu Kim
  • Patent number: 7714809
    Abstract: A plasma display device and driving method thereof has a peak value of one frame is detected and then converted. A grayscale or a grayscale value is converted according to an original peak value and a converted peak value, and a total number of sustain pulses applied to the one frame is reset such that a brightness corresponding to the converted grayscale or grayscale value is set to be equal to a brightness corresponding to the original grayscale or grayscale value. In such a manner, the numbers of on-subfields and useable subfields corresponding to the grayscale of the input video signal are increased, so that the discharge characteristics are enhanced and the false contour is reduced.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: May 11, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Seung-Ho Park
  • Patent number: 7667672
    Abstract: A plasma display apparatus and a method of driving a plasma display panel are disclosed. The plasma display apparatus includes a plasma display panel including a first electrode and a second electrode, and an integrated sustain driver. The integrated sustain driver supplies a sustain signal of a positive polarity and a sustain signal of a negative polarity to the first electrode during a sustain period. Two light emissions occur during at least one period of a supply period of the sustain signal of the positive polarity or a supply period of the sustain signal of the negative polarity.
    Type: Grant
    Filed: January 5, 2007
    Date of Patent: February 23, 2010
    Assignee: LG Electronics Inc.
    Inventor: Janghwan Cho
  • Patent number: 7659871
    Abstract: Provided are a plasma display panel (PDP) and a driving method thereof. The PDP includes a first substrate and a second substrate disposed in parallel and spaced apart from one another. Address electrodes are provided on the first substrate with a first dielectric layer over the address electrodes and the first substrate. Barrier ribs are provided on the dielectric forming a plurality of discharge spaces in which phosphor layers are provided. Sustain electrodes are formed on the second substrate facing the first substrate and are arranged crossing the address electrodes. A second dielectric layer is formed over the address electrodes and on the second substrate, and a protective layer including MgO of at least 99.6% purity by weight is formed over the second dielectric layer by a sintering process.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: February 9, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ki-Dong Kim, Yong-Su Park
  • Patent number: 7652641
    Abstract: A driving apparatus of a plasma display panel for applying a rising or falling waveform to a panel capacitor, comprising a transistor for forming a current path between a power source and the panel capacitor while the transistor is turned on, and which is coupled between the power source and one end of the panel capacitor. A first capacitor and a second capacitor are coupled in parallel to each other and in between a drain and a gate of the transistor. A first resistor and a first diode are coupled in parallel to each other between a first end of the first capacitor and the gate, and a second resistor and a second diode are coupled in parallel to each other between a first end of the second capacitor and the gate.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: January 26, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Seung-Hun Chae, Woo-Joon Chung, Jin-Sung Kim, Kyoung-Ho Kang, Tae-Seong Kim
  • Patent number: 7649508
    Abstract: A plasma display apparatus may be provided that reduces a noise generating in a waveform applied to a scan electrode or a sustain electrode and that stabilizes address discharge by improving applying time point of a waveform applied in an address period, so that driving stability of a panel may increase. The plasma display apparatus may include a plasma display panel in which a plurality of scan electrodes and a plurality of address electrodes intersecting the scan electrodes are formed, and a data driver dividing the address electrode into a plurality of electrode groups, corresponding to a scan waveform applied to the scan electrode, and the data driver applying an address waveform to one address electrode group, and the address waveform having an applying time point that is different from an applying time point of the scan waveform.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: January 19, 2010
    Assignee: LG Electronics Inc.
    Inventors: Heechan Yang, Yunkwon Jung, Jinyoung Kim
  • Patent number: 7633465
    Abstract: A plasma display apparatus and a driving method of a plasma display panel which can improve a gradation expressing ability at low luminance. A magnesium oxide layer containing a magnesium oxide crystal which is excited by irradiation of an electron beam and performs a cathode luminescence light emission having a peak in a wavelength range of 200 to 300 nanometers is provided in each of display cells formed on the plasma display panel. When driving for a plurality of subfields having different luminance weights is performed, a sustaining discharge is caused only once in the subfield having the minimum luminance weight.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: December 15, 2009
    Assignee: Panasonic Corporation
    Inventors: Kazuaki Sakata, Masaru Nishimura, Atsushi Hirota, Tsutomu Tokunaga, Hai Lin
  • Patent number: 7619588
    Abstract: In a plasma display device, the application of at least one address signal to a cell receiving a scan signal is offset from the application of the scan signal. Such offset improves picture quality and/or reduces noise.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: November 17, 2009
    Assignee: LG Electronics Inc.
    Inventors: Heechan Yang, Yunkwon Jung, Jinyoung Kim
  • Patent number: 7602355
    Abstract: The present invention relates to a plasma display panel, and more particularly, to a plasma display apparatus and driving method thereof, in which power consumption can be reduced and contrast can be improved, so that a high contrast image can be displayed. The plasma display apparatus according to the present invention comprises a scan electrode, a sustain electrode, and a controller for applying a rising waveform and a falling waveform to the scan electrode in a reset period of a first subfield of a frame and applying the falling waveform to the scan electrode when a first time elapses, after a first sustain voltage is applied to the scan electrode during a sustain period. The sustain electrode is applied with a second sustain voltage when a second time is elapsed, after the first sustain voltage is applied.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: October 13, 2009
    Assignee: LG Electronics Inc.
    Inventors: Sung Im Lee, Ki-Duck Cho, Min Soo Kim, Kyoung Jin Jung
  • Patent number: 7598932
    Abstract: The present invention relates to a plasma display apparatus and driving method thereof. The plasma display apparatus according to the present invention comprises a Plasma Display Panel (PDP), an energy storage part for recovering energy from the PDP, and an energy supply and recovery controller that forms a current path so that the energy storage part can be charged or discharged. In the energy supply and recovery controller, a reference bias voltage is a negative voltage. The driving method of the plasma display apparatus according to the present invention comprises the steps of supplying energy to the PDP, and maintaining a reference bias voltage of a recovery switch part to a negative voltage when an energy storage part recovers energy from the PDP.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: October 6, 2009
    Assignee: LG Electronics Inc.
    Inventors: Sunggon Shin, Yunkwon Jung
  • Patent number: 7567225
    Abstract: A plasma display panel driver for applying a Zener diode to a falling ramp driving circuit, and reducing a falling ramp driving initial voltage to a voltage that causes a discharge. The driver comprises a transistor having a first electrode coupled between a first terminal of a panel capacitor and a power source; a capacitor having a first terminal coupled to a control electrode of the transistor; and a first resistor, a diode, and a Zener diode coupled in parallel between a second terminal of the capacitor and the first electrode of the transistor.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: July 28, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Seung-Hun Chae, Woo-Joon Chung, Jin-Sung Kim, Kyoung-Ho Kang, Tae-Seong Kim
  • Patent number: 7522129
    Abstract: An electrode drive circuit of a plasma display device comprises: a scan driver provided with plural drivers including first and second switching elements and first and second diodes; a capacitor connected between the high potential side terminal and the low potential side terminal of the scan driver; a voltage supply circuit for selectively supplying plural voltages relating to the positive and negative voltages of the reset pulse and the voltage of a scan pulse to the low potential side terminal of the second switching element; and a negative reset switch and a resistor connected in series between the high potential side terminal of the first switching element and a ground terminal, wherein the reset pulse of negative polarity is applied by turning on the negative reset switch in a state where the capacitor is charged with the negative voltage of the reset pulse.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: April 21, 2009
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Yoshikazu Kanazawa, Shigetoshi Tomio, Takashi Fujisaki
  • Patent number: 7495635
    Abstract: Positive and negative sustain discharge voltages of equal magnitude are alternately applied to a scan electrode while biasing the sustain electrode at 0 V during a sustain interval. The positive sustain discharge voltage is applied through the first end of the scan electrode, and the negative sustain discharge voltage is applied through the second end of the scan electrode. The present invention may remove a brightness variation which may occur toward a direction the scanning electrode extends.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: February 24, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin-Sung Kim, Woo-Joon Chung, Seung-Hun Chae
  • Patent number: 7492332
    Abstract: A method and apparatus for driving a plasma display panel in which discharge cells are formed by first, second, and third electrodes, has a frame divided into a plurality of subfields, each of which includes a reset period, an address period, and a sustain period. In the reset period, a voltage at the first electrode is modified from a first voltage to a second voltage, the first electrode is floated; and the voltage at the first electrode is gradually reduced to a third voltage.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: February 17, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Tae-Seong Kim, Woo-Joon Chung, Jin-Sung Kim
  • Patent number: 7468712
    Abstract: Disclosed is a PDP driving method having a misfiring erase period between reset and address periods. Large amounts of positive and negative charges are respectively formed on scan and sustain electrodes because of an unstable reset operation in the reset period. Because of the charges, discharging can occur between the scan and sustain electrodes in the sustain period even without addressing in the address period. In the misfiring erase period, a voltage is applied between the scan and sustain electrodes to generate discharging and respectively form negative and positive charges on the scan and sustain electrodes. An erase pulse is then applied to erase the negative and positive charges respectively formed on the scan and sustain electrodes.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: December 23, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin-Boo Son, Kwang-Ho Jin, Jin-Sung Kim, Jea-Hyuk Lim, Jin-Won Nam
  • Patent number: 7450090
    Abstract: A plasma display panel and an imaging device realize a high luminous efficiency, a long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an electrode serving as an address electrode is 2 ?s or less.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: November 11, 2008
    Assignees: Hitachi, Ltd., Fujitsu Hitachi Plasma Display, Ltd.
    Inventors: Norihiro Uemura, Keizo Suzuki, Hiroshi Kajiyama, Yusuke Yajima, Masayuki Shibata, Yoshimi Kawanami, Koji Ohira, Ikuo Ozaki
  • Patent number: 7436374
    Abstract: In a Plasma Display Panel (PDP) power control apparatus, an internal voltage of a power supply is detected, and a determination is made as to whether an Alternating Current (AC) power input to the power supply has been turned off on the basis of the detected internal voltage. The output of the power supply is controlled according to a predetermined sequence based on a result of the determination to turn off the PDP. The apparatus rapidly and accurately senses that the AC power has been turned off and performs a predetermined power off sequence to prevent damage to a driving circuit and to prevent the picture quality of the PDP from being degraded.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: October 14, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Yong-Seok Chi
  • Patent number: 7417602
    Abstract: A method for driving a plasma display panel. A discharge occurs at a selected discharge cell by scan and address pulses to form wall charges in an address period. A setup pulse is applied to a scan electrode in a sustain period. A discharge occurs between sustain and scan electrodes by a wall voltage of the sustain and scan electrodes and a voltage of the setup pulse when the setup pulse is applied. A self discharge occurs between the sustain and scan electrodes when the setup pulse falls, to form space charges. A sustain pulse is applied to the sustain and scan electrodes, and a sustain occurs by the space charges and the sustain pulse.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: August 26, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Takahisa Mizuta
  • Patent number: 7403200
    Abstract: A bi-directional switch comprising first and second semiconductor switching devices, a current sensor connected in series with the switching devices, thereby forming a series circuit, a driver circuit controlling the on/off operation of the first and second switching devices such that the first and second switching devices are substantially simultaneously turned on and off, the driver circuit turning the first and second switching devices on in response to a control input and turning the first and second switching devices off when current in the current sensor substantially drops to near a zero current. A discharge sustain driver circuit employing the bi-directional switches for a plasma display panel (PDP) is also described.
    Type: Grant
    Filed: May 25, 2004
    Date of Patent: July 22, 2008
    Assignee: International Rectifier Corporation
    Inventor: Edgar Abdoulin
  • Patent number: 7375722
    Abstract: In a circuit driving a capacitive load Cp, current passed through a transistor Q3, a diode D1 and a recovering coil L is passed through lines L1, L2, and the inductance components of the lines L1 and L2, and the drain-source capacitances of the transistors Q1 and Q2 generate LC resonance. Capacitors C1 and C2 are connected in parallel to the drain-source regions of the transistors Q1 and Q2 to increase the total drain-source capacitance and reduce the resonance frequency, so that unwanted electromagnetic wave radiation in a frequency band affecting other electronic devices is suppressed.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: May 20, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shigeo Kigo, Hidehiko Shoji, Jumpei Hashiguchi
  • Patent number: 7358968
    Abstract: The collector, emitter, and base of a bipolar transistor circuit are connected to a high side power supply terminal, the drain of a level shift transistor, and a floating power supply terminal, respectively. When a high side output transistor is on, the floating power supply terminal is at the potential of a high potential power supply terminal. The high side power supply terminal is at a potential higher than the potential of the floating power supply terminal by a constant voltage. Turning the level shift transistor on, its drain potential drops below the potential of the floating power supply terminal; The base current flows through the bipolar transistor circuit and the drain potential of the level shift transistor is clamped near the potential of the floating power supply terminal; The bipolar transistor circuit is turned on and its collector current supplies the drain current of the level shift transistor.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: April 15, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masahiko Sasada, Hiroki Matsunaga, Masashi Inao, Hiroshi Ando, Jinsaku Kaneda, Eisaku Maeda, Akihiro Maejima
  • Publication number: 20080062087
    Abstract: In a plasma display and a voltage generator thereof, a first electrode of a transistor is coupled to a scan electrode. In addition, a cathode of a Zener diode is coupled to a second electrode of the transistor, and an anode of the Zener diode is coupled to a power source generating a scan voltage. A first resistor is coupled between the first electrode of the transistor and a control electrode of the transistor, and a second resistor is coupled between the control electrode of the transistor and the anode of the Zener diode. A final voltage during a reset period is generated by the power source generating the scan voltage.
    Type: Application
    Filed: September 10, 2007
    Publication date: March 13, 2008
    Inventors: Jeong-Hoon Kim, Jung-Pil Park, Suk-Ki Kim, Jung-Soo An
  • Patent number: 7307601
    Abstract: In an address driving circuit including a power recovery circuit, the voltage of the address electrode is reduced through a transistor, and the voltage of the address electrode increases through the current formed by the body diode of the transistor. In addition, the ground voltage is not applied to the address electrode in the power recovery circuit after the voltage of the address electrode is reduced. As a result, the resonance for raising the voltage of the address electrode and the resonance for reducing the voltage of the address electrode can be performed through the same transistor, and the transistor for applying the ground voltage to the address electrode can be eliminated.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: December 11, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jun-Young Lee, Jin-Sung Kim, Nam-Sung Jung
  • Patent number: 7170474
    Abstract: In an address driving circuit including a power recovery circuit, an energy charged in an external capacitor is established to be greater than an energy discharged from the external capacitor. As a result, a voltage of the external capacitor is increased to an address voltage to automatically stop a power recovery operation in the case of displaying a full white pattern. Further, to perform the power recovery operation in the cases of the dot on/off pattern and the line on/off pattern, the voltage of the external capacitor reaches an equilibrium state between the half the address voltage and the address voltage.
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: January 30, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jun-Young Lee, Byung-Nam An, Nam-Sung Jung
  • Patent number: RE43083
    Abstract: A gas discharge panel includes a first substrate and a second substrate. A plurality of display electrode pairs which are each made up of a sustain electrode and a scan electrode are formed on the first substrate, and the first substrate and the second substrate are set facing each other with a plurality of barrier ribs in between so as to form a plurality of cells. In this gas discharge panel, at least one of the sustain electrode and the scan electrode includes: a plurality of line parts; and a discharge developing part which makes a gap between adjacent line parts smaller in areas corresponding to channels between adjacent barrier ribs than in areas corresponding to the barrier ribs.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: January 10, 2012
    Assignee: Panasonic Corporation
    Inventors: Masaki Nishimura, Hidetaka Higashino, Ryuichi Murai, Yusuke Takata, Nobuaki Nagao, Toru Ando, Naoki Kosugi, Hiroyuki Tachibana