Abstract: Disclosed is a multipurpose air vehicle including a frame (1) on which a propeller (11) and a mechanical unit (10) equipped with an engine are mounted, and a cabin (2) is coupled inside the frame (1). The frame (1) is constructed by upper and lower circular plates (101, 102) and curved posts (111, 112, 113, 114) that interconnect the upper and lower circular plates (101, 102), and is provided with two or more arms (12) that can protrude and retract, and a propeller (11) is provided on the tip end of each arm (12). The cabin (2) includes a circular plate member (3) and further includes at least four connectors (21) provided on the front, the rear, the left, and the right ends thereof, and each connector (21) has a tip end installed on a rail (13) of the frame (1) so as to guide pivoting of the cabin (2). The multipurpose air vehicle may freely perform upward and downward movement and forward and rearward movement, and thus may be used anywhere in the air, ground, or water.

Abstract: Disclosed is a multipurpose air vehicle including a frame (1) on which a propeller (11) and a mechanical unit (10) equipped with an engine are mounted, and a cabin (2) is coupled inside the frame (1). The frame (1) is constructed by upper and lower circular plates (101, 102) and curved posts (111, 112, 113, 114) that interconnect the upper and lower circular plates (101, 102), and is provided with two or more arms (12) that can protrude and retract, and a propeller (11) is provided on the tip end of each arm (12). The cabin (2) includes a circular plate member (3) and further includes at least four connectors (21) provided on the front, the rear, the left, and the right ends thereof, and each connector (21) has a tip end installed on a rail (13) of the frame (1) so as to guide pivoting of the cabin (2). The multipurpose air vehicle may freely perform upward and downward movement and forward and rearward movement, and thus may be used anywhere in the air, ground, or water.

Abstract: A plasma display panel is provided having a first substrate and a second substrate facing the first substrate with an interval therebetween. An address electrode extends in a first direction on the first substrate. A dielectric layer is on the first substrate covering the address electrode. One or more barrier ribs are on the dielectric layer to define a discharge cell in relation to the address electrode. A phosphor layer is in the discharge cell. A first electrode and a second electrode extend in a second direction on the second substrate corresponding to the discharge cell. The second direction crosses the first direction. The dielectric layer includes a flat surface facing the discharge cell.

Abstract: A flat display panel in which a field emission principle of ferroelectrics is applied to improve the luminous efficiency with a low driving voltage, and a method of driving the same.

Abstract: A plasma display panel capable of improving stability of discharge. The plasma display panel includes a first substrate, a second substrate facing the first substrate, discharge cells defined in a space between the first substrate and the second substrate, first electrodes formed between the first substrate and the second substrate and extending along a first direction, and second electrodes formed apart from the first electrodes on the second substrate and extending along a second direction perpendicular to the first direction. The second electrodes protrude from the second substrate, and third electrodes are formed apart from the first electrodes on the second substrate and extend along the second direction, wherein the third electrodes protrude from the second substrate and face the second electrodes.

Abstract: A plasma display panel is provided. The plasma display panel includes a first substrate, a second substrate facing the first substrate, a plurality of discharge cells which are formed by partitioning a space between the first and second substrates, a plurality of address electrodes which are formed on the first substrate to extend in a first direction, a plurality of first and second electrodes which are formed on the first substrate to extend in a second direction perpendicular to the first direction. The first and second electrodes being electrically separated from the address electrodes and facing each other with the discharge cells interposed therebetween.

Abstract: A plasma display panel having an opposed discharge structure that can improve discharge efficiency is disclosed.