| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 345063000 | Intensity control | 31 |
| 20080198101 | PLASMA DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME - A plasma display apparatus and a method of driving the same are disclosed. In the method, the number of sustain signals assigned to at least one of a plurality of subfields of a frame is different from the number of sustain signals assigned to the other subfields depending on an average power level (APL) of the frame. The number of sustain signals assigned depending on the APL is additionally adjusted in relation to a maximum gray level of the frame. | 08-21-2008 |
| 20080211741 | DRIVE METHOD OF PLASMA DISPLAY PANEL - A drive method of a plasma display panel that can increase the dark contrast, without causing a discharge failure. When a discharge cell that assumes a black display state in a first field from among first and a second fields that are adjacent in time and switches to a display state representing a brightness other than black in the second field is detected as a lighting transition cell, at least one drive of the below-described first and second forced lighting drives is executed. In the first forced lighting drive, the lighting transition cell is forcibly set into the lighting mode only in the address process of a predetermined subfield within the field in the first field. In the second forced lighting drive, an adjacent discharge cell that is adjacent to the lighting transition cell is forcibly set into the lighting mode only in the address process of the predetermined subfield in the second field. | 09-04-2008 |
| 20080218447 | Plasma Display Module and Its Driving Method, and Plasma Display - Luminance of a plasma display is enhanced while suppressing deterioration in resolution. In a plasma display module comprising panel sections ( | 09-11-2008 |
| 20080231554 | ELECTRO-LUMINESCENCE DISPLAY - An electroluminescent display comprises a substrate with a plurality of pixel regions, wherein each pixel region has a first sub-pixel region, a second sub-pixel region, and a third sub-pixel region. Pluralities of first color light-emitting layers, second color light-emitting layers, and third color light-emitting layers are formed on the substrate. Each first color light-emitting layer is disposed in one first sub-pixel region, and each second color light-emitting layer is disposed in two adjacent second sub-pixel regions. The area of the first sub-pixel region is larger than the area of the second sub-pixel region in a single pixel region. | 09-25-2008 |
| 20080252562 | Plasma Display Panel Driving Method and Plasma Display Device - A method for driving a plasma display panel including discharge cells at the intersections of data electrodes D | 10-16-2008 |
| 20080252563 | METHOD OF DRIVING PLASMA DISPLAY PANEL - A method of driving a plasma display panel, which includes secondary electron emission material in a fluorescent layer in discharge cells, has a resetting process in which a first reset discharge is generated between one of a pair of row electrodes of the plasma display panel as an anode and a column electrode as a cathode by applying a voltage between the one row electrode and the column electrode. A second reset discharge is generated by applying a first base pulse having a positive peak potential to the other of the row electrodes while applying a negative potential to the one row electrode. A second base pulse having a positive peak potential different from the positive peak potential of the first base pulse is applied to the other row electrode while a negative potential is applied to the one row electrode throughout the execution period of an addressing process. | 10-16-2008 |
| 20080266213 | PLASMA DISPLAY DEVICE AND AUTOMATIC POWER CONTROL METHOD FOR GENERATING ADDRESS DATA OF PLASMA DISPLAY DEVICE - According to one embodiment, a plasma display device has a plurality of pixels for displaying images during frames using an input video signal, each of the frames being divided into a plurality of sub-fields, each of the sub-fields including a reset period, an address period, and a sustain discharge period, and the images having gray levels according to combined brightness weights of the sub-fields. The plasma display device includes an address power controller for reducing the gray level of a first pixel of the pixels by decreasing a sum of the brightness weights of the sub-fields, and for increasing the gray level of a second pixel of the pixels by increasing a sum of the brightness weights of the sub-fields, the second pixel being adjacent to the first pixel and the gray level of the second pixel being lower than the gray level of the first pixel. | 10-30-2008 |
| 20080278416 | Multiple grayscale display method and apparatus - In a PDP apparatus (multiple grayscale display apparatus), an technique for reducing the unevenness of the electric charge states between cells and the background emission by the reset discharge, and also reducing the false outline, therefore, the image quality can be improved, and the drive can be stabilized is provided. In a multiple grayscale display method by sub field method, a structure in which as a sub field lighting pattern, in only specified sub fields (example: SF | 11-13-2008 |
| 20080278417 | PLASMA DISPLAY APPARATUS - A AC type plasma display apparatus has been disclosed, which satisfies various requirements such as the number of gradations that can be displayed, the display luminance, and the upper limit of power and, further, the efficiency of light emission and the luminance can be increased as much as possible and the display quality of which is not deteriorated. In the plasma display apparatus, a frame is composed of plural subfields, an image is displayed by causing a sustain discharge to occur in each subfield, the sustain discharge can be caused to occur by at least a first sustain waveform and a second sustain waveform different from the first sustain waveform, and the ratio of the first sustain waveform to the second sustain waveform changes, both waveforms being used to cause the sustain discharge to occur in each subfield. | 11-13-2008 |
| 20080284686 | METHOD OF DRIVING PLASMA DISPLAY PANEL - When a sustain discharge corresponding to the display light is repeatedly produced by applying a drive pulse to a PDP which includes a fluorescent layer in the discharge cells, the drive pulse waveform is adjusted in accordance with the total number of sustain discharges. Furthermore, an auxiliary pulse of the same polarity as that of the sustain pulse is applied to the column electrodes in a period from after the application of a final scan pulse in the address process until the application of a leading sustain pulse. A period from the final sustain pulse until the time of the application of the leading pixel data pulse which is applied first in the write address process of the one subfield of the subsequent frame is made 1 millisecond (msec) or more. | 11-20-2008 |
| 20080284687 | Display apparatus - A display apparatus, that can prevent thermal destruction and burning with a simple structure, has been disclosed. In the apparatus it is judged that there is possibility of a pattern, whose area with high brightness is small, being displayed frequently, when a state in which the total light emission pulse number remains large occurs with high frequency, and if such a state is detected, the total light emission pulse number (sustain frequency) is reduced to prevent the thermal destruction and burning. | 11-20-2008 |
| 20080291133 | Plasma display, controller therefor, and driving method thereof - A plasma display according to an exemplary embodiment of the present invention applies different driving methods according to a maximum grayscale level of image data input for one field. When the maximum grayscale level of the field is higher than a reference level, an address period for selecting a light emitting cell and a non-light emitting cell from a plurality of discharge cells and a sustain period for sustain-discharging light emitting cells among the plurality of discharge cells are simultaneously driven in a plurality of sequential subfields after a first subfield. When the maximum grayscale level of the field is less than the reference level, the address period and the sustain period are time-separately driven in the plurality of subfields. | 11-27-2008 |
| 20080316148 | PLASMA DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - A technique capable of suppressing or preventing generation of flickers (blinks) by a sustain period control as well as capable of ensuring or enhancing display quality in a PDP device. The PDP device adjusts a sustain pulse of the sustain period for every subfield by selecting a combination of one or more than one cycle so that start and end timings of a field in fields before and after change are almost the same according to a display load ratio of the subfield of the field. Field weighted emission center positions then becomes almost the same, and flickers and the like are suppressed. | 12-25-2008 |
| 20090002279 | Plasma display device and control method thereof - A plasma display device is provided which expresses a video with gradations by selecting each of a plurality of subfields forming one field, each of the subfields having a weighted number of sustain pulses. A sustain pulse number calculation unit calculates a display load factor of an input video signal and calculates a total number of sustain pulses of one field according to the display load factor. A gradation number selection unit selects a gradation number being a sum of weights of all of the subfields according to the calculated total number of sustain pulses. | 01-01-2009 |
| 20090009435 | Method of Driving Plasma Display Panel and Plasma Display Unit - A method of driving a panel and a plasma display unit is provided, wherein one field comprises a plurality of subfields, each having an addressing period for producing an address discharge selectively in any of discharge cells, and a sustaining period for producing a sustain discharge by applying a number of sustaining pulses corresponding to a weight of brightness in the discharge cell where the address discharge has been produced. Provided therein is a sustaining pulse generator circuit comprising a power recovery section for rising or falling the sustaining pulse by producing resonance between an inter-electrode capacitance of a display electrode pair and an inductor, and a clamping section for clamping a voltage of the sustaining pulse at a predetermined potential, wherein the power recovery section is used to set twice a time of rising the sustaining pulse to become equal to or longer than a duration of the sustaining pulse. The method and the plasma display unit realize a remarkable reduction of power consumption while achieving high brightness of the panel. | 01-08-2009 |
| 20090040146 | PLASMA DISPLAY APPARATUS AND PLASMA DISPLAY PANEL DRIVING METHOD - A disclosed plasma display apparatus and a plasma display panel driving method provide improved luminance while preventing decrease in resolution. In the plasma display apparatus, which is adapted to the display of an interlace signal, the maximum number of sustain pulses associated with the emission of light that can be made in one field is calculated, based on the vertical synchronization signal frequency of the input signal. A display load factor of the input signal in the one field is calculated and, based on the calculated display load factor, a target number of sustain pulses in the one field is determined. Based on a relationship between the target number of sustain pulses and the maximum number of sustain pulses, an emission luminance ratio of a sub-display line to a main-display line in the one field is determined. | 02-12-2009 |
| 20090040147 | Plasma display and driving method thereof - The plasma display includes a controller and a driver. The controller divides one frame into a plurality of subfields, and establishes address and sustain periods in the respective subfields according to a subfield load ratio indicating a ratio of light emitting cells in the respective subfields. The driver selects a light emitting cell among the plurality of discharge cells during the established address period and sustain-discharges the light emitting cell during the established sustain period. | 02-12-2009 |
| 20090040148 | White balance correction circuit and correction method for display apparatus that displays color image by controlling number of emissions or intensity thereof in accordance with plurality of primary color video signals - A display apparatus, which displays a color image by controlling the number of emissions or the intensity thereof in accordance with primary color video signals input thereto, has a detection portion and a white balance correction portion. The detection portion is used to detect the number of emissions or the intensity, and the white balance correction portion is used to correct white balance by adjusting the amplitudes of the primary color video signals in accordance with the detected number of emissions or the detected intensity. Therefore, correct white balance can be maintained regardless of the number of emissions or the intensity of emission. | 02-12-2009 |
| 20090121979 | Method of driving plasma display panel - A method of driving a plasma display panel (PDP) capable of improving gray scale display comprises the steps of applying pulses having a first voltage to first electrodes and second electrodes during a sustain period of at least one subfield and reducing a voltage of the first electrodes to a voltage of no more than one-half of the first voltage while maintaining a voltage of the second electrode at a second voltage. | 05-14-2009 |
| 20090128456 | PLASMA DISPLAY PANEL AND DRIVING METHOD THEREOF - A driving method for a plasma display panel to improve brightness when the load is low is provided. The driving method of the plasma display panel includes allocating a first number of sustain pulses for driving the plasma display panel when a load of the plasma display panel exceeds a reference load. The first number of sustain pulses is allocated as a function of a power consumption of the plasma display panel. The method further includes allocating a second number of sustain pulses for driving the plasma display panel when the load is less than the reference load. The second number of sustain pulses is allocated to improve brightness. | 05-21-2009 |
| 20090153442 | Plasma Display Apparatus - According to the invention, by forming at least every two frames having video contents corresponding to each frame of a video signal, for example, a frame rate of movie contents whose frame rate is equal to 24 Hz is converted into 48 Hz. A plurality of subfields (SFs) corresponding to each frame of the conversion signal are divided into first and second division SF groups. Each division SF group is further classified into an upper SF group on the large weight side and a lower SF group on the small weight side. The weights of the upper SF groups are made symmetrical between the first and second division SF groups. The weight of each SF belonging to the lower SF group in the first division SF is set to be larger than that in the second division SF. | 06-18-2009 |
| 20090174627 | PLASMA DISPLAY AND DRIVING DEVICE AND METHOD THEREOF - A plasma display, a driver for the plasma display, and a driving method thereof apply a reset minimum voltage according to a detected temperature of the plasma display. In the driving method, a reset falling waveform gradually decreasing to a reset minimum voltage is applied to a scan electrode during a falling period of a reset period, and a scan voltage is applied to the scan electrode selected during an address period. An address period is started the voltage applied to the scan electrode reaches the reset minimum voltage. In addition, a voltage difference between the reset minimum voltage and the scan voltage is determined according to a temperature of the plasma display. | 07-09-2009 |
| 20090219229 | METHOD FOR DRIVING PLASMA DISPLAY PANEL - When the temperature of a plasma display panel falls outside a predetermined temperature range or when the time during which the plasma display panel is used exceeds a predetermined time, the largest potential difference between one row electrode and the other row electrode is reduced in a second half of a reset step. | 09-03-2009 |
| 20090231237 | METHOD FOR DRIVING PLASMA DISPLAY PANEL - A method for driving a plasma display panel (PDP) that can increase dark contrast without causing erroneous discharges is provided. A unit display period is divided into a plurality of subfields. A reset process and a sustain process are performed in one of the subfields. In the reset process, a reset pulse is applied to row electrodes of the PDP to initialize each discharge cell to an emission mode (or non-emission mode). In the sustain process, a sustain discharge is repeatedly generated a number of times, corresponding to the number of times a sustain pulse is to be applied, in those discharge cells that are in the emission mode. In this case, a peak potential of the reset pulse is changed based on the number of those discharge cells that are maintained in the non-emission mode during the unit display period and the number of times the sustain pulse is to be applied in the sustain process in this subfield. | 09-17-2009 |
| 20090278768 | Method and apparatus for processing video data for display on a plasma display panel - A method and an apparatus for processing video data for display on a plasma display panel include dividing gray level values reverse gamma corrected with respect to input gray level values into an integer portion, an upper decimal fraction portion and a lower decimal fraction portion. The lower decimal fraction is then dithered, a first update value generated according to the lower decimal fraction dithering result is added to the upper decimal fraction portion, and the upper decimal fraction having the first update value added thereto is dithered. Finally, a second update value generated according to the upper decimal fraction dithering result is added to the integer portion. | 11-12-2009 |
| 20090295688 | PLASMA DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME - A plasma display apparatus and a method of driving the same are disclosed. The method includes assigning a predetermined number of sustain signals to each of subfields constituting a frame depending on weight values of the subfields, selecting some of combinations of the subfields, actually measuring a luminance of light emitted by the plasma display apparatus during a frame comprised of the selected subfield combination, normalizing a luminance corresponding to each subfield combination depending on the actually measured highest luminance to calculate a reference normalized gray level, and calculating an intermediate gray level between the reference normalized gray levels. | 12-03-2009 |
| 20090322656 | PLASMA TUBE ARRAY-TYPE DISPLAY DEVICE AND LUMINANCE CORRECTING METHOD - This invention provides a plasma tube array-type display device and a luminance correcting method realizing reduced variations in luminance values of a plasma tube array. A gradient of the luminance value in the longitudinal direction of one plasma tube is calculated on the basis of the obtained luminance value at a plurality of positions in the longitudinal direction of at least one plasma tube. A difference of the luminance value of each plasma tube obtained at the same relative position. On the basis of the gradient of the luminance value and the difference of the luminance value of each plasma tube at the same relative position, a correction luminance value in each discharge cell in the longitudinal direction of each of the plurality of plasma tubes is calculated. | 12-31-2009 |
| 20100097301 | LIGHT EMITTING APPARATUS AND IMAGE DISPLAY APPARATUS USING THE SAME - A light emitting apparatus includes a plurality of light emitting devices including luminous bodies, and a plurality of resistors made of the same material having negative resistance-temperature characteristics, the plurality of resistors being connected respectively in series to the plurality of light emitting devices. When the plurality of resisters are at the same temperature, one or ones among the plurality of resistors, which exhibit higher temperatures during driving, have larger resistance values than other among the plurality of resistors, which exhibit lower temperatures during the driving. | 04-22-2010 |
| 20100141563 | PLASMA DISPLAY DEVICE AND CONTROL METHOD THEREOF - A plasma display device and display method are provided. The plasma display device expresses a video with gradations by controlling lighting of subfields forming one field, each of the subfields having a weighted luminance. A load factor calculation unit calculates a display load factor of an input video signal. A sustain pulse number change and control unit changes and controls a total number of sustain pulses of one field according to the display load factor. A gradation number conversion processing unit selects a gradation number expressed by the plasma display device according to the total number of sustain pulses and converts the input video signal into a display video signal of the selected gradation number. An error diffusion processing unit spatially diffuses a value corresponding to a decimal fraction when the gradation value of the display video signal in the selected gradation number has the value corresponding to the decimal fraction. | 06-10-2010 |
| 20100177021 | Plasma display device and processing method thereof - A display method of a plasma display device and plasma display device are provided. The display method includes nonlinearly converting first image data corresponding to an input image signal to second image data having a gradation value smaller than a gradation value of first image data and expressing the second image data by a real part and an error part. The display method includes error diffusing of, when the error part of the second image data is not zero, spatially or temporally diffusing the error part. The display method includes subfield pattern converting of selecting a lighting pattern of the subfields based on the error-diffused second image data. | 07-15-2010 |
| 20150371592 | LIQUID CRYSTAL DISPLAY - A liquid crystal display including a first substrate, a first sub-pixel electrode on the first substrate and configured to receive a first voltage, a second sub-pixel electrode on the first substrate and configured to receive a second voltage, an insulating layer between the first sub-pixel electrode and the second sub-pixel electrode, a second substrate facing the first substrate, and a common electrode on the second substrate, wherein the first sub-pixel electrode includes a first sub-region below the insulating layer and a second sub-region above the insulating layer, wherein the second sub-region of the first sub-pixel electrode includes a plurality of first branch electrodes, wherein the second sub-pixel electrode is above the insulating layer, and wherein a difference between the first voltage and a common voltage is greater than a difference between the second voltage and the common voltage. | 12-24-2015 |
