Abstract: A method of driving a plasma display panel capable of improving the contrast with reduced power consumption while suppressing a pseudo-contour. In each of a plurality of subfields divided from a display period of one field, a pixel data writing stage is executed for selectively erasing and discharging wall charges formed in discharge cells in accordance with pixel data to set the discharge cells to light emitting cells and non-light emitting cells, and a light emission sustaining stage is executed for allowing the light emitting cells to sustain light emission for a time corresponding to weighting for each subfield. Also, a simultaneous resetting stage is provided for simultaneously resetting or discharging all discharge cells to form wall charges only in the first subfield in a group of subfields including at least two mutually consecutive subfields, and the erasing discharge is performed only in the pixel data writing stage in any subfield in the group of subfields.

Abstract: A frame of a video signal is divided into a plurality of sub-frames. Each of the sub-frames is composed by an address period for selecting light emitting pixels or light non-emitting pixels at every scanning line in accordance with a pixel data, and a discharge sustaining period for causing a light emitting pixel to emit at a number of times in accordance with weighting of each sub-frame. A plurality of sub-frames are adjacently disposed to form a sub-frame block. A reset period is provided in a first sub-frame of the sub-frame block so as to initialize all pixels prior to the address period.

Abstract: A luminance level compensating apparatus passes only the luminance signal of a pixel in a first detection range in the vertical direction of an image indicated by an input luminance signal, detects and stores a first frequency for each luminance level of the passed luminance signal for each predetermined period, passes only a luminance signal of a pixel in a second detection range including the first detection range in the vertical direction of the image, detects and stores a second frequency for each luminance level of the passed luminance signal for each predetermined period; generates a mixed frequency data based on the first and second frequencies stored.

Abstract: A display device in which a display panel is driven by converting a video signal of interlaced scanning inputted by field-to-field interpolation processing using fields of the same film frame into a video signal of line sequential scanning in the case that the video signal of the inputted video signal of interlaced scanning is a telecine-converted video signal by unit of field obtained by telecine-converting the film source of 24 frames per second, thinning out the video signal of line sequential scanning after the conversion, writing it in a memory by unit of field, repeatedly reading the video signal of line sequential scanning written into the memory by n times from the memory at a rate of n times as large as 24 Hz, and using the read video signal.

Abstract: A display panel driving method sequentially writes pixel data of every display line into pixel cells on display lines belonging to a region other than a black display region on a screen, while the method stops writing pixel data into pixel cells on display lines belonging to the black display region or simultaneously sets the pixel cells into a non-light emitting cell state. Since a time spent for each pixel data writing process in one field is reduced, a light emission period (number of times) allocated to each light emission sustain process is increased, or the number of subfields is increased by the reduction in time, thereby making it possible to improve the quality of a displayed image.

Abstract: A display panel driving method capable of realizing a high definition gradation display while reducing power consumption. In each of a plurality of divisional display periods constituting a unit display period in a video signal, a pixel data writing stage is performed for setting each of pixel cells to either a light emitting cell or a non-light emitting cell in accordance with pixel data corresponding to the video signal, and a light emission sustain stage is performed for causing only the light emitting cells to emit light a number of light emissions allocated in correspondence to a weighting factor applied to each of the divisional display periods. A luminance distribution of the video signal is measured every display line on the display panel, and the number of divisional display periods in the unit display period is changed every display line in accordance with the luminance distribution.

Abstract: A plasma display device capable of providing high luminance display. In each subfield, a non-selected line on which all the discharge cells are not subjected to selective discharge is detected, and pixel data writing scanning is performed only to display lines excluding such non-selected lines.

Abstract: A plasma display panel driving method capable of improving the contrast while preventing spurious borders. Only in the first subfield, a writing discharge is selectively produced only in discharge cells except for those serving to display a luminance level “0” to initialize these discharge cells to a light emitting cell state. Then, only in one of the remaining subfields except for the first subfield, an erasure discharge is selectively produced in the discharge cells remaining in the light emitting cell state in accordance with pixel data, causing the discharge cells to transition to a non-light emitting cell state. Only the discharge cells remaining in the light emitting cell state are driven to emit light the number of light emissions allocated thereto corresponding to a weighting factor applied to the subfield.

Abstract: A driving method of a plasma display panel capable of executing a dither processing without lowering display quality. When only discharge cells set to a light emission cell state in accordance with input image signals are allowed to emit light a predetermined number of light emissions allotted in accordance with weighting of sub-fields, the number of light emissions to be allotted is rendered different for each discharge cell inside a discharge cell block.

Abstract: An infrared remote control device used for a plasma display device in which a light-reception signal is obtained by reception of infrared rays, the light-reception signal is demodulated, a signal component during an emission sustaining period is removed from the modulated output signal by a gate circuit, the output signal is output, the output signal of the gate circuit is delayed by a delaying circuit in the field, the logical sum of the output signal of the gate circuit and the output signal of the delaying circuit is calculated, and the contents of the remote control signal that controls the operation of the plasma display device are judged in accordance with a signal obtained by the calculation of the logical sum.

Abstract: A plasma display device which improves the contrast of an image displayed. The plasma display device includes a plurality of row electrodes formed in pairs corresponding to each display line, a plurality of column electrodes arranged to cross the row electrodes to form a discharge cell corresponding to one pixel at each intersection with a pair of said row electrodes, and a driving controller for controlling driving of the row and column electrodes. A gradation display of input pixel data is performed by dividing one field display period into a plurality of subfields. The driving controller, when one field of input pixel data is displayed, changes the number of reset discharges for initializing all discharge cells in accordance with an average luminance value of input pixel data in the preceding field.

Abstract: A method of driving a plasma display panel which prevents a burning phenomenon when a still image is displayed. A plasma display device includes a plurality of row electrodes formed in pairs corresponding to each display line, a plurality of column electrodes arranged to cross the row electrodes to form a discharge cell corresponding to one pixel at each intersection with a pair of the row electrodes, and a driving controller for controlling driving of the row electrodes and the column electrodes. A gradation display of input pixel data is performed by dividing one field display period into a plurality of subfields. The driving controller, when one field of input pixel data is displayed, changes the number of reset discharges for initializing all discharge cells depending on whether an image to be displayed is a still image or a moving image.

Abstract: A method for driving a plasma display panel capable of obtaining a good display quality. In a pixel data writing step in a sub-field that is weighted small, discharge cells in the plasma display panel are scanned in a unit of plurality of display lines and are set to one of a light emitting state and a non-light emitting state depending upon the pixel data.

Abstract: A display panel driving method capable of performing a good intermediate luminance display corresponding to an input video signal. A unit display period in a video signal is composed of a plurality of divisional display periods. In each of the divisional display periods, a pixel data writing process is performed for setting each of pixel cells to either a light emitting cell or a non-light emitting cell in accordance with pixel data corresponding to the video signal, and a light emission sustain process is performed for causing only the light emitting cells to emit light a number of light emissions allocated in correspondence to a weighting factor applied to each of the divisional display period. A luminance distribution of the video signal is measured every display line on the display panel, and the number of light emissions allocated to each of the light emission sustain process is changed every display line in accordance with the luminance distribution.

Abstract: A luminance gradation correcting apparatus which can properly correct the gradation of a luminance level even if a size of actual image portion of an image differs from a size of image.

Abstract: A half tone display method of a display panel which can prevent the generation of a pseudo outline and can improve a contrast and a display picture quality. In the driving operation to cause light emission of the display panel having a plurality of row electrodes arranged in the horizontal direction corresponding to display lines and a plurality of column electrodes which are arranged in the vertical direction which perpendicularly crosses the row electrodes and form discharge cells at crossing points, a unit display period is divided into a plurality of divided periods and a plurality of light emitting modes in which the orders of light emitting periods which are allocated to each of the divided periods are made different are switched and executed every discharge cell or every discharge cell block in which a plurality of adjacent discharge cells form one set.

Abstract: A frame of a video signal is divided into a plurality of sub-frames. Each of the sub-frames is composed by an address period for selecting light emitting pixels or light non-emitting pixels at every scanning line in accordance with a pixel data, and a discharge sustaining period for causing a light emitting pixel to emit at a number of times in accordance with weighting of each sub-frame. A plurality of sub-frames are adjacently disposed to form a sub-frame block. A reset period is provided in a first sub-frame of the sub-frame block so as to initialize all pixels prior to the address period.

Abstract: A drive apparatus for a self light-emitting display unit accomplishes pseudo intermediate tone display and pseudo outline compensation while maintaining a high image quality. In executing dithering-based pseudo intermediate tone display and pseudo outline compensation data conversion on pixel data corresponding to the individual pixels of the self light-emitting display unit, dither coefficients to be added to the individual pieces of pixel data are changed field by field in this dithering process. Furthermore, the pseudo outline compensation data conversion performed is associated with each dither coefficient added in the dithering process.

Abstract: Kinds of an input video signal is discriminated. Sub-frames are disposed in such an arrangement that a sub-frame corresponding to a most heavy weight bit is located at a central portion of the unit display period, and sub-frames, each of which corresponds to a lighter weight bit than the most heavy weight bit, are disposed at positions before and after the most heavy sub-frame when the input video signal is discriminated as a still picture. Each of sub-frames which correspond to heavy weight bits including a most heavy weight bit is divided into two small sub-frames. The sub-frames are disposed in such an arrangement that small sub-frames corresponding to the most heavy weight bit are located at portions of the unit display period, small sub-frames, each of which corresponds to a lighter weight bit than the most heavy weight bit, at positions before and after the most heavy sub-frame when the input video signal is discriminated as a moving picture.

Abstract: In a self-luminous display, one field of a video signal is divided into a plurality of sub-fields. A plurality of tables stores a plurality of converting pixel data, each of the converting pixel data is different from other converting pixel data in weight in accordance with a luminance level applied thereto. The difference between a pixel data of a selected central pixel in a picture and pixel data of pixels adjacent to the central pixel is detected, and a first select signal when there is a difference, and a second select signal when there is no difference are produced. In response to the first and second select signals, one of the converting pixel data is selected in accordance with distinction of the select signal. A corresponding pixel is driven for a period dependent on the selected converting pixel data.