Abstract: A display apparatus having a display part to receive a predetermined weight number of sustain pulses to display a frame of an image time-shared into a plurality of subfields, the display apparatus includes a motion detector to determine whether an input image is a still image, and a pulse driver to transmit a number of sustain pulses to the display part, and to decrease the number of sustain pulses transmitted to the display part to cause every frame to be smaller than the weight number when the motion detector determines the input image to be the still image. In this display apparatus and control method thereof, image sticking is prevented without deteriorating gradation representation and without a visual error.

Abstract: Disclosed is a plasma display panel. The plasma display panel comprises a lower substrate and an upper substrate, which are spaced apart by a predetermined distance from each other to define a plurality of discharge cells therebetween; a plurality of barrier ribs disposed between the lower substrate and the upper substrate; a plurality of address electrodes formed in parallel with one another on an upper surface of the lower substrate; a plurality of discharge electrodes formed in a direction crossing the address electrodes on a lower surface of the upper substrate; and a fluorescent layer formed on an inner wall of the discharge cells, wherein the upper substrate comprises a plurality of light guides, which are formed in parallel with the plurality of address electrodes to focus and output visible light generated from the discharge cells by a discharge, the light guides having a light incident surface.

Abstract: A plasma display panel (PDP) is provided. The plasma display panel comprises a lower substrate and an upper substrate spaced apart by a predetermined distance, forming a discharge space; a plurality of barrier ribs between the lower substrate and the upper substrate, partitioning the discharge space to form a plurality of discharge cells; a plurality of address electrodes formed in parallel on the upper surface of the lower substrate; a plurality of discharge electrodes formed at an angle to the address electrodes on the lower surface of the upper substrate; a fluorescent layer formed on the inner wall of the discharge cells; and an external light shielding member formed on the upper substrate prevents external light from entering the discharge cells, wherein the upper substrate has a plurality of convex lenses parallel to the address electrodes, to focus generated visible light out of the PDP.

Abstract: Disclosed is a plasma display panel comprises a lower substrate and an upper substrate, spaced apart by a predetermined distance to define a discharge space therebetween; a plurality of barrier ribs between the lower substrate and the upper substrate, partitioning the discharge space to form a plurality of discharge cells; a plurality of address electrodes formed in parallel on the upper surface of the lower substrate; a plurality of discharge electrodes formed at an angle to the address electrodes on the lower surface of the upper substrate; a fluorescent layer formed on the inner walls of the discharge cells; and an external light shielding member formed on the upper substrate, preventing external light from entering the discharge cells, wherein the lower surface of the upper substrate has a plurality of cylindrical lenses, corresponding to each of the discharge cells.

Abstract: A display apparatus that displays a picture based on a video signal, including a moving picture determiner that determines whether the video signal is used for displaying a moving picture; a moving picture gradation level table that stores information about a moving picture gradation level group for displaying the moving picture; a still picture gradation level table storing information about a still picture gradation level group including a predetermined number of gradation levels in consideration of a gradation level difference between the gradation levels of adjacent gradation levels in the case where the gradation level difference between the adjacent gradation levels of the moving picture gradation level group is larger than a predetermined reference gradation level difference; and a gradation level converter that converts the video signal to have the gradation level of the moving picture gradation level group or the still picture gradation level group according to results of the determination.

Abstract: A display apparatus with a display part displaying a picture thereon, the display apparatus including a brightness level determiner to determine a brightness level of the video signal and a sub-field coder to change the video signal into a sub-field code word formed as binary data that is sequentially arranged with respect to a plurality of sub-fields and representing a luminescence state of the pixel of the display part at each sub-field, and to output the sub-field code word to the display part. A luminescence pattern generator determines the number of sustaining pulses applied to the plurality of sub-fields forming the frame according to the brightness levels determined by the brightness level determiner, and transmits the sustaining pulses to the display part during a luminescence period of each sub-field until the number of representable gradation levels is equal to the number of sustaining pulses for the frame.

Abstract: An apparatus for and a method of detecting a motion vector (MV) by selectively using a median filter according to a correlation between blocks in a frame rate conversion of an image signal. The apparatus includes first and second motion vector detection units. The first motion vector detection unit performs motion estimation on a reference block to detect a motion vector as a final MV of the reference block if a location of the reference block in the present frame of an input image signal belongs to an object's boundary area adjacent to an image area in which a motion scarcely exists. The second motion vector detection unit performs median-filtering the MV of the reference block to detect a medial MV as the final MV of the reference block if the location of the reference block does not belong to the object's boundary facing the area in which the motion scarcely exists. Thus, the occurrence of motion artifacts due to the median filter can be prevented.

Abstract: Disclosed is a frame interpolating apparatus and a method thereof used at a frame rate conversion. The frame interpolating apparatus includes a calculation unit for performing a SAD Map calculation among inputted video signals with respect to a previous frame and a next frame and performing block matching, a determination unit for determining from the block-matched frame whether a video is repeated periodically and is changing fast, and an interpolation unit for selectively calculating a pixel value of an interpolated frame according to a determination result of the determination unit. Accordingly, the interpolated frame is vivid and clear, hence, removing the conventional blurring problem.

Abstract: Provided are an apparatus and method for controlling CRT focusing in a television, and more particularly, an apparatus and method for separately controlling focusing of R, G, and B cathode ray tubes in a television using a triple tube type optical system based on a digital method. The apparatus includes a memory, a controller, and an R/G/B focusing correction signal generator. The memory stores focusing correction data of R, G, and B cathode ray tubes for a position of a screen. The controller reads and outputs the focusing correction data of the R, G, and B cathode ray tubes from the memory for the position of the screen, based on horizontal and vertical synchronization signals. The R/G/B focusing correction signal generator calculates the focusing correction data of the R, G, and B cathode ray tubes read from the memory and generates R, G, and B analog focusing correction signals that will be applied to R, G, and B coils.

Abstract: A rear-type liquid crystal projection television set according to the present invention comprises a dichroic mirror which receives color light to which electrical video signal is applied, reflects and transmits the received color light through cells having a light reflection characteristic and cells having a light transmission characteristic, a first screen for receiving the color light reflected by the dichroic mirror means and displaying the received color light as an image, and a second screen for receiving the color light transmitted by the dichroic mirror means and displaying the received color light as an image. A dichroic mirror consisted of cells includes the reflection and transmission of the same color light, and thereby to allow viewers to view the same image of the television set in different directions.