Abstract: An optical module including a matching circuit and a connector is provided. The matching circuit of the optical module achieves an impedance matching with the active elements. The connector of the optical module includes two electrical contact points with inner active elements and an external circuit board. One contact point to be electrically connected to the external circuit board protrudes from the back surface of a package parallel to an optical axis. The optical module of the present invention is easily attached and detached to and from an optical communication system, and has a high-frequency characteristic of minimizing signal loss and interference between signals.

Abstract: Disclosed is a flat panel display and a method for manufacturing the same. The flat display has a first substrate and a second substrate sealed in a vacuum at a predetermined interval to form a cell gap and including a plurality of spacers interposed therebetween, the second substrate including a plurality of anode electrodes formed in a predetermined pattern on one side thereof and a phosphor layer formed on the pattern of the anode electrodes.

Abstract: A flat panel display includes a back plate, gate electrode and cathode electrodes disposed on the back plate and insulated from each other by an insulating layer, a planar field emission source formed of carbonaceous material disposed on the cathode electrode, a grid plate provided with a plurality of apertures corresponding to a pixel area and spaced from the back plate, first and second grid electrodes formed on each surface of the grid plate, respectively, and a faceplate spaced from the grid plate and a screen formed on one surface thereof facing the grid plate.

Abstract: An electron gun for a color cathode ray tube includes a cathode, a triode portion having control and accelerating electrodes, a pre-focus lens formed by a first accelerating/focusing electrode, a second accelerating/focusing electrode, and a third accelerating/focusing electrode, and a main lens formed by the third accelerating/focusing electrode and a fourth accelerating/focusing electrode, wherein outer lens elements of the pre-focus lens and the main lens are inclined so as to prevent formation of halos.

Abstract: An in-line electron gun for a color CRT includes a static electrode (39') applied with a static voltage, and a dynamic electrode (40') applied with a dynamic voltage. A side of the static electrode (39') facing toward the dynamic electrode (40') is formed with a common opening for the electron beams, and a plain electrode (21) having three apertures (20) is positioned inside the static electrode (39'). The dynamic electrode (40') has a pair of lens reinforcement partitions (38) having round horizontal partitions (41) disposed in a vicinity of the apertures (20) and has a curvature similar to that of the apertures (20), and linear partitions (42) formed integral with the round partitions (41) to provide a static facing side of the dynamic electrode (40') with a quadrupole effect. The in-line electron gun reduces the voltage difference of the peak-to-peak voltage of the dynamic voltage reducing the production cost of the dynamic voltage supply.