Samsung Sdi Co., Inc.

Kue-Hong Lee

Hoo-Deuk Kim

Young-Gon Hong

Min-Cheol Bae

Nozomu Arimoto

Chang-Ryon Byon

Jae-Young Ha

Seok-Nam Lee

Yeoung-Uk Nam

Dong-Won Lim

Ho-Rim Choi

A CRT includes an electron gun that includes a cathode adapted to emit thermal electrons, a first electrode and a second electrode adapted to form a triode portion together with the cathode, a plurality of focusing electrodes, an anode electrode and a subsidiary electrode arranged between the second electrode and a one of said plurality of focusing electrode adjacent to the second electrode. The subsidiary electrode is adapted to dynamically control an imaginary crossover point ofelectron beams emanating from the electron gun corresponding to landing locations ofthe electron beams on a phosphor screen of a panel in response to a voltage applied thereto.

Electron gun for cathode ray tube and cathode ray tube with the same

An image display device includes a cathode ray tube. The cathode ray tube includes a panel with an inner phosphor screen, and a funnel connected to the panel with a cone portion mounting a deflection unit on the outer circumference thereof. A neck is connected to the funnel while mounting an electron gun therein. The interface between the cone portion and the neck is called a neck seal line, and the portion of the electron gun sealed to the neck called a gun sealing portion. When the distance between the panel and the neck seal line is indicated by A and the distance between the neck seal line and the gun sealing portion by B, the values of A and B satisfy the following conditions:0.31&#x3c;&#x3c;0.38 and79 mm&#x3c;&#x3c;95 mm.

Cathode ray tube

A cathode ray tube includes a panel in which a phosphor layer is formed, a funnel connected to the panel, the funnel including a neck having a region for housing an electron gun and a region to which a stem is sealed, and a stem having a plurality of stem pins, each stem pin being supported by each stem mound for applying voltage to each electrode of the electron gun. The inside diameter of the stem sealing region of the neck is greater than that of the electron gun-housing region, the diameter of an inner stem pin circle formed by interior stem pins disposed on the inside of the neck is less than that of an outer stem pin circle formed by exterior stem pins disposed on the outside thereof, a horizontal length between an outer edge of the stem mound and an interior of the neck is in the range greater than or equal to 1.0 mm and less than or equal to 2.0 mm. Furthermore, the cathode ray tube includes a panel in which a phosphor layer is formed, a funnel connected to and tapered from the panel, and a neck connected to the funnel and including an electron gun housing region and a stem sealing region, to which a stem having a plurality of stem pins arranged in an annular shape and passing therethrough for introducing signal voltages from an external circuit is sealed, where D is 22.5&plusmn;0.7 mm and D is in the range greater than D and less than or equal to 24.0 mm where the outside diameters of the electron gun-housing region and the stem sealing region are D and D , respectively.

Neck of funnel and stern sealed to neck of cathode ray tube

Growing community of inventors

Suwon-si, South Korea

Kue-Hong Lee