Abstract:
To increase heat dissipation from a plasma display panel, a heat sinking unit 2 bonded to a curved back surface 11 of a panel unit includes a large number of fin blocks 21 arranged spaced apart from each other by a prescribed distance and a flexible thin-wall portion 22, and a joining section 221, which consists of fin anchoring portions 212 and thin-wall portions 22, is capable of being bent between the fin blocks 21, thus allowing the heat sinking unit 2 to conform to the curvature of the panel unit back surface 11. When using a heat sinking unit not structured to conform to the curvature of the panel unit back surface 11, a high-orientation graphite film as a heat equalizing layer is interposed between the panel unit back surface and the heat sinking unit.
Abstract:
An electric discharge lamp has a discharge vessel including pair of opposing planar seals each having a pair of major faces and a pair of minor, side faces. A containment shield surrounds the discharge vessel and includes a glass sleeve and a helically coiled wire secured on the glass sleeve. The glass sleeve is pinched to bevelled ends of the minor, side faces of the seals only and substantially does not engage the major faces of the seal. The wire is fixed around the sleeve in an electrically floating manner, e.g. by clamping fit. With the sleeve secured to the discharge vessel, MH quality photometrics are obtained with a tubular body arc tube without an end coat. The construction of the lamp is simple and effective to protect the outer bulb from being damaged by an explosion of the discharge vessel, and to prevent sodium from disappearing from the discharge vessel as a result of photoemission.
Abstract:
A spark gap switch apparatus is disclosed which is capable of operating at a high pulse rate which comprises an insulated housing; a pair of spaced apart electrodes each having one end thereof within a first bore formed in the housing and defining a spark gap therebetween; a pressure wave reflector in the first bore in the housing and spaced from the spark gap and capable of admitting purge flow; and a second enlarged bore contiguous with the first bore and spaced from the opposite side of the spark gap; whereby pressure waves generated during discharge of a spark across the spark gap will reflect off the wave reflector and back from the enlarged bore to the spark gap to clear from the spark gap hot gases residues generated during the discharge and simultaneously restore the gas density and pressure in the spark gap to its initial value.
Abstract:
A high-pressure discharge lamp comprising a discharge vessel (3) enclosed by an outer envelope (1) provided with a neck (10) which is adjoined by a sleeve (20) of a lamp cap (2). The lamp cap (2) accommodates an electrical circuit provided with a semiconductor switching element (26) which controls the discharge current in the operating condition of the lamp. The semiconductor switching element (26) is provided with a cooling member (24) which is preferably secured to the sleeve (20). This lamp may be used without further expedients in combination with a stabilization ballast not adapted to the lamp.
Abstract:
A self pumping spark gap that switches high voltage current in large amou and provides for a flow of gas by use of one way valves. The valves open and close in accordance with changes in pressure experienced during the sparking sequence.
Abstract:
A gas-discharge chamber electrode is proposed, comprising a hollow metal member with an emitting portion on the gas-discharge side and with coolant pipes. The hollow metal member is coated on the outside, except for the emitting portion, with a high-temperature dielectric. The electrode system includes at least two such electrodes.