Samsung Sdi Co., Inc.

Chan-Jae Lee

Chun-Gyoo Lee

Seung-Hyun Son

Tae-Young Ko

Gon-Jin Chung

Bo-Ra Choi

A power supply including: a power supply circuit for receiving an external power and a battery power, and for outputting a power including at least one of the external power or the battery power to a load; and a battery pack coupled to the power supply circuit, the battery pack including a plurality of batteries, which are arranged into a plurality of battery groups including a first battery group and a second battery group, and configured to provide the battery power. Where, the battery pack is configured to selectively supply a power of the first battery group or a power of the second battery group as the battery power to the power supply circuit according to at least one of a status of the external power, a status of the load, a status of the first battery group, or a status of the second battery group.

Power supply apparatus and controlling method of the same

A field emission display includes first and second substrates spaced apart from each other with a predetermined distance. The top surface of the first substrate faces the bottom surface of the second substrate. A main cathode electrode layer is disposed on the top surface of the first substrate. A gate electrode layer is arranged over the main cathode electrode layer such that the gate electrode layer and the main cathode electrode layer intersect to be orthogonal to each other. The intersection of the gate electrode layer and the main cathode electrode layer becomes to be unit pixel areas. The gate electrode layer has a plurality of holes at the unit pixel areas. A resistance layer is formed on the main cathode electrode layer while being positioned at the unit pixel areas. A first insulation layer with one or more contact holes is formed on the resistance layer. A subsidiary cathode electrode layer is formed on the first insulation layer while contacting the resistance layer through the contact holes. A second insulation layer is formed on the subsidiary cathode electrode layer. The gate electrode layer is formed on the second insulation layer. A field emitter with a plurality of electron emitting members is positioned within the holes of the gate electrode layer while resting on the subsidiary cathode electrode layer. An anode electrode layer is formed on the bottom surface of the second substrate with a predetermined electrode pattern. A phosphor layer is formed on the anode electrode layer.

Field emission display

The rear substrate of an FED comprises data electrodes formed on a surface of the substrate, an insulating layer over the substrate covering the data electrodes, scan and common electrodes laterally disposed on the insulating layer such that they are parallel with each other and electron emitting elements, which emit electrons when they subject to electric field, connected between a scan electrode and a common electrode. The electron emitting elements have a middle portion narrower than end portions so that electron emitting surface area is located at a same location from emitter to emitter.

Growing community of inventors

Seoul, South Korea

Chan-Jae Lee