Abstract: An indoor wireless positioning method according to one embodiment of the present invention includes receiving initial received signal strength indicator (RSSI) information from a reception unit; searching for a fingerprint matching measured initial RSSI information in a fingerprint database; determining a first location corresponding to the retrieved fingerprint to be an initial location of the reception unit; receiving additional RSSI information from the reception unit; extracting features of variability between the additional RSSI information and the initial RSSI information; searching for variability fingerprints matching the initial location and extracted RSSI variability features in a variability fingerprint database; and updating a second location to a current location of the reception unit when the second location corresponding to the retrieved variability fingerprint is different from the initial location, wherein the second location is a location in a candidate area within a preset distance range ce

Abstract: As inputs of a controller of a direct current (DC)-DC converter are sampled for a predetermined time and thus two-dimensional state information in which one axis is an input physical quantity and the other axis is a time is generated, the two-dimensional state information is processed by a convolutional neural network to determine and output one of a plurality of control signals. An artificial intelligence control part may operate in accordance with a plurality of operation conditions or dynamically determined operation conditions by applying different artificial intelligence engines according to operation modes.

Abstract: Internal phase shifting is achieved by adding a feedback divider to a feedback loop of a phase locked loop circuit configured to determine a transmission frequency of a wireless transmission terminal and adding a phase adjustment current to a loop current. Since the phase adjustment current is applied to an adder circuit, a phase difference is maintained even when the feedback loop is in a stable state, and accordingly, an output of the feedback divider maintains the phase difference with a reference frequency as intended by the phase adjustment current applied to the adder circuit.

Abstract: A window for a display device includes a cover glass including a flat portion and a curved portion adjacent to the flat portion, a decorative film which is disposed on the cover glass and in which a plurality of holes overlapping the curved portion is defined, and a printing layer disposed on the decorative film and covering the plurality of holes.

Abstract: A window for a display device includes a cover glass including a flat portion and a curved portion adjacent to the flat portion, a decorative film which is disposed on the cover glass and in which a plurality of holes overlapping the curved portion is defined, and a printing layer disposed on the decorative film and covering the plurality of holes.

Abstract: The plasma display device comprises a plasma display panel and the filter which is formed at a front of the plasma display panel, wherein the filter includes an external light shielding sheet which comprises a base unit, and a plurality of pattern units formed on the base unit, wherein a bottom of the pattern units, which is wider than a top of the pattern units, comprises a concave having a curvature. The device can improve bright room contrast. Also, the sharpness of the display images may be enhanced by reducing the bleeding phenomenon of the display images as well as the adhesiveness of the filter may be enhanced by forming the bottom of the pattern units of the external light shielding sheet as a concave shape in which the center area is depressed into the inside.

Abstract: A backlight unit having a polarization film for performing the function of a reflective polarization film, wherein the backlight unit includes a light source, an optical film and a polarization film. The light source emits a light having a certain wavelength, the optical film is located proximate to the light source to transmit the light outputted from the light guiding plate in a certain direction, and the polarization film is located proximate to the optical film. Here, the polarization film has a UV curing resin and lines disposed on the UV curing resin, and polarizes the light transmitted from the optical film. The backlight unit manufactures the polarization film by using an UV curing resin and a metal substance, and thus the manufacture period of the polarization film may be reduced enabling the polarization film to be manufactured in great quantities.

Abstract: The present invention relates to a prism sheet having a side which is perpendicular to the normal of a light guiding plate. The prism sheet includes a prism sheet base film and a plurality of linearly aligned prisms. The prisms are formed on one side of the prism sheet base film. Here, one side of each prism is perpendicular to the prism sheet base film. The prism sheet condenses a light outputted from a light guiding plate using its internal total reflection, and so the efficiency of the light is enhanced.

Abstract: The present invention relates to a filter and a plasma display device thereof, wherein the filter includes an external light shielding sheet which comprises a base unit, and a plurality of pattern units that are formed on the base unit, wherein a bottom, which is wider than a top, of the pattern units is formed as a concave shape. According to the present invention, the plasma display device of the present invention can effectively realize black images and enhance bright room contrast, as an external light shielding sheet, which absorbs and shields as much external light incident upon a plasma display panel PDP as possible, is disposed at a front of the plasma display panel. Also, the sharpness of the display images may be enhanced by reducing the bleeding phenomenon of the display images as well as the adhesiveness of the filter may be enhanced by forming the bottom of the pattern units of the external light shielding sheet as a concave shape in which the center area is depressed into the inside.

Abstract: A separator sheet for manufacturing an electric double layer capacitor, and a method for manufacturing the electric double layer capacitor using the same, are provided. According to an embodiment, the separator sheet for manufacturing the electric double layer capacitor comprises: a plurality of separators; and a resin film holding the plurality of separators, wherein the separators are disposed in the resin film at a predetermined interval.