Abstract: Provided are a method for preparing a polyetherketoneketone and a polyetherketoneketone prepared thereby, wherein, at the time of a polymerization reaction, nitrogen gas is blown into a liquid reaction medium while stirring, thereby quickly removing hydrochloric acid, which is a by-product generated during the reaction, and preventing aggregation of resin particles, thus suppressing the generation of scales.

Abstract: A plasma display device (PDP) and method of driving it (during an address period) are provided. Such a PDP has an address electrode for receiving an address pulse and a capacitor. Such an address pulse has states including a first voltage and a smaller second voltage smaller. Such a capacitor stores a third voltage that is between the first and third voltages. Such a method includes: coupling the capacitor to the address electrode via the inductor; firstly energizing, via the inductor, the address electrode with the third voltage stored in the capacitor; secondly energizing the address electrode with the first voltage; thirdly energizing, via the inductor, the capacitor with voltage on the address electrode; and fourthly energizing the address electrode with the second voltage. Real power transfer during the first and third energizations is facilitated via reactive power transfer arising from LC resonance.

Abstract: The present invention relates to a plasma display panel driving method and apparatus for reducing subfield position variation between display frames by arranging an idle period among the subfields. The subfields included in the frame may be divided into at least two subfield groups with reference to a predetermined weight value at which flicker may occur. An idle period, which is substantially a residual time of the frame excluding the subfields, may be arranged between two divided subfield groups. Accordingly, flicker caused by the variation of the number of subfields between frames can be prevented because of the reduced positional variation of the subfields.

Abstract: A power supply for a plasma display device controls an output voltage by using a voltage divided by first resistors coupled to an output terminal, and outputs the output voltage as a driving voltage for driving a PDP. The output voltage is changed by varying a resistance of at least one first resistor from among the first resistors according to a temperature of the PDP.

Abstract: A method for controlling address power consumption on a PDP is disclosed. Image data to be displayed on the PDP are converted into subfield data, and the subfield data are analyzed to generate a variation value of the data for each subfield. An address power recovery circuit operates or ceases operating in one or more subfields based on the variation value of the data associated with each subfield. Image data is determined to be a normal mode or a specific mode based on the generated variation value of the image data, and the number of the subfields displayed on the PDP during the specific mode is set to be less than the number of subfields displayed during the normal mode.

Abstract: A PDP address data processor, a method thereof, and a recording medium for storing a program used to perform the method. The address data processor generates subfield data corresponding to RGB input video data, divides them into two sets of subfield data, and stores them in a frame memory using rising and falling edges of a reference clock signal of a frame memory. The address data processor reads and arranges the stored subfield data using the rising and falling edges to generate address data for representing gray on the PDP. The address data processor uses an RGB mixing algorithm for selecting two different video data from among the RGB input video data to select video data, and generates the subfield data corresponding to the selected video data.

Abstract: In a driver for driving an address electrode in a plasma display, a power recovery switch is coupled between a power recovery capacitor and the address electrode, and a driving switch is coupled between a power source for supplying an address voltage and the address electrode. A grounding switch is coupled between a ground terminal and the address electrode. The power recovery switch, the driving switch, and the grounding switch are formed in one integrated circuit. The address electrode driver turns on the power recovery switch during a first period within a period for varying a voltage at the address electrode from a 0V voltage to a Va voltage and turns on the power recovery switch during a second period within a period for varying the voltage at the address electrode from the Va voltage to the 0V voltage. The power recovery switch is turned on for about 62 ns.

Abstract: A PDP address data processor, a method thereof, and a recording medium for storing a program used to perform the method. The address data processor generates subfield data corresponding to RGB input video data, divides them into two sets of subfield data, and stores them in a frame memory using rising and falling edges of a reference clock signal of a frame memory. The address data processor reads and arranges the stored subfield data using the rising and falling edges to generate address data for representing gray on the PDP. The address data processor uses an RGB mixing algorithm for selecting two different video data from among the RGB input video data to select video data, and generates the subfield data corresponding to the selected video data.

Abstract: A method for driving a plasma display panel including a plurality of pixels, a plurality of first electrode lines, a plurality second electrode lines, and a plurality of third electrode lines crossing the first electrode lines and the second electrode lines, and being driven by dividing a frame into a plurality of subfields, each subfield including a reset period, an address period and a sustain discharge period, the method including: applying a first pre-address signal to a first group of third electrode lines among the plurality of third electrode lines in a pre-address period, the pre-address period being between the reset period and the address period in at least one of the subfields; and applying a second pre-address signal to at least a second group of third electrode lines among the plurality of third electrode lines in the pre-address period.

Abstract: A plasma display device (PDP) and method of driving it (during an address period) are provided. Such a PDP has an address electrode for receiving an address pulse and a capacitor. Such an address pulse has states including a first voltage and a smaller second voltage smaller. Such a capacitor stores a third voltage that is between the first and third voltages. Such a method includes: coupling the capacitor to the address electrode via the inductor; firstly energizing, via the inductor, the address electrode with the third voltage stored in the capacitor; secondly energizing the address electrode with the first voltage; thirdly energizing, via the inductor, the capacitor with voltage on the address electrode; and fourthly energizing the address electrode with the second voltage. Real power transfer during the first and third energizations is facilitated via reactive power transfer arising from LC resonance.

Abstract: A plasma display device includes a plasma display panel mounted on a first side of a chassis base, a mount on a second side of the chassis base, the mount being electrically connected to the chassis base, a printed circuit board including an electrical grounding section and having an opening in the electrical grounding section, the printed circuit board mounted on the mount by an electrically conductive fastener passing through the opening in the electrical grounding section, and a grounding module positioned in the opening so as to be between the electrical grounding section and the electrically conductive fastener and electrically connecting the electrical grounding section to the mount.

Abstract: A method and apparatus for displaying an image on a plasma display panel. Each of a plurality of subfields has three consecutive subfield groups in time order, and the luminance weight of the subfields in a second subfield group among the three subfield groups is set to be smaller than the luminance weight of a lowermost subfield in the first subfield group and the luminance weight of a lowermost subfield in the third subfield group. Further, the starting positions of the second subfield group and the third subfield group in time order change according to the load ratio of the image signal.

Abstract: In a PDP driving method, an image of each field displayed on the PDP corresponding to an input video signal is divided into sub-fields with different weights, and a combination of the weights is used for gradation. The method includes: determining an automatic power control (APC) level for driving the PDP; determining a pulse width comprising any one of an address pulse width, a sustain pulse width, and a reset pulse width, or a combination of at least two of the three pulse widths for each sub-field using the APC level, the determined pulse width including as an increment a part of a pause period occurring in driving the PDP at the APC level; and performing addressing on the PDP according to the pulse width.

Abstract: Disclosed is a PDP image display method and device for dividing an image of each frame displayed on a PDP corresponding to an input video signal into subfields, each subfield corresponding to a bit that represents one of a plurality of luminance weights, combining luminance weights of the subfields, and displaying gray. The subfields include first and second subfield groups. A number of the subfields included in the second subfield group is greater than a number of the subfields included in the first subfield group. At least one of the subfields, which is used for forming low gray, is included in the second subfield group, and a start point of the second subfield group is varied according to a load ratio of the input video signal.

Abstract: A power supply for a plasma display device controls an output voltage by using a voltage divided by first resistors coupled to an output terminal, and outputs the output voltage as a driving voltage for driving a PDP. The output voltage is changed by varying a resistance of at least one first resistor from among the first resistors according to a temperature of the PDP.

Abstract: An image of each field displayed on a plasma display panel corresponding to input image signals is divided into sub-fields of different weights, the sub-fields being divided into two continuous sub-field groups having a different weighting value, and in which the weighting values of the sub-fields combine to display grays. The method includes generating original grays; determining a diffusion filter value; generating final grays by applying the diffusion filter value to the original grays; generating gray data corresponding to the final grays, the gray data being distributed over the two sub-field groups; and displaying an image on the PDP according to the gray data. The disclosed method and system reduce flicker and contour noise and other display problems associated with the display of 50 Hz Phase Alternating by Line image signals.

Abstract: A plasma display device includes a plasma display panel mounted on a first side of a chassis base, a mount on a second side of the chassis base, the mount being electrically connected to the chassis base, a printed circuit board including an electrical grounding section and having an opening in the electrical grounding section, the printed circuit board mounted on the mount by an electrically conductive fastener passing through the opening in the electrical grounding section, and a grounding module positioned in the opening so as to be between the electrical grounding section and the electrically conductive fastener and electrically connecting the electrical grounding section to the mount.

Abstract: An image display method and system for a plasma display panel. An image of each field displayed on the plasma display panel corresponding to input image signals is divided into sub-fields. Weighting values of the sub-fields are combined to display grays. The sub-fields are divided into three continuous groups. Sub-fields corresponding to a Least Significant Bit (LSB) and a LSB+1 of each sub-field data are included in a second sub-field, which is positioned in a middle of the three consecutive groups with respect to time. Therefore, a time difference between the LSB and the LSB+1 of the sub-field data with respect to images displayed by 50 Hz Phase Alternating by Line (PAL) image signals is reduced such that contour noise between low gray regions is diminished.

Abstract: In a plasma display, pairs of first and second electrodes are divided into groups. In a subfield, a light-emitting cell is set from among discharge cells of a first group from among the groups, and the light-emitting cell is sustain-discharged for a first number of times. A light-emitting cell is set from among discharge cells of a second group, and the light-emitting cell is sustain-discharged for a first number of times. The light-emitting cell of the first group is sustain-discharged for a second number of times, and the light-emitting cell of the second group is sustain-discharged for a third number of times. The sum of the first number and the second number equals the third number so that the light-emitting cells of the first and second groups are sustained discharged for an equal number of times.

Abstract: The present invention relates to a plasma display panel driving method and apparatus for reducing subfield position variation between display frames by arranging an idle period among the subfields. The subfields included in the frame may be divided into at least two subfield groups with reference to a predetermined weight value at which flicker may occur. An idle period, which is substantially a residual time of the frame excluding the subfields, may be arranged between two divided subfield groups. Accordingly, flicker caused by the variation of the number of subfields between frames can be prevented because of the reduced positional variation of the subfields.