Samsung Sdi Co., Inc.

Jong-Heon Kim

Hyung-Seok Oh

Sang-Shin Choi

Eung-Suk Lee

Tae-Yong Kim

Soon-Cheol Shin

Hoo-Deuk Kim

Joon-Soo Bae

Jeong-Hoon Kim

Chang-Ryon Byon

Hyang-Jin Koh

Seong-Seob Kim

Seok-Nam Lee

Jung-In Yoo

Min-Boum Hyun

Do-Hun Pyen

A cathode ray tube includes a tube having a panel having an inner phosphor screen, a funnel connected to the panel, a neck connected to the funnel, a deflection unit disposed around the funnel, an electron gun installed in the neck, and a scatter-proof unit installed on the panel and the funnel such that the panel shares the scatter-proof unit with the funnel for preventing the tube from breaking and scattering into many pieces.

Cathode ray tube having a scatter-proof band

A shadow mask for a cathode ray tube is formed with a curved surface such that a radius of curvature corresponding to a perpendicular axis which passes through the center of the shadow mask decreases monotonely along the perpendicular axis from the center of the shadow mask and a radius of curvature corresponding to a parallel axis which passes through the center of the shadow mask decreases monotonely along the parallel axis from the center of the shadow mask. The curved surface satisfies the following condition, [0.1RV+0.9RV, 0.9RV+0.1RV]&#x2282;[RH, RH]. RVand RVrespectively represent the minimum and the maximum value of the minimum radius of curvature corresponding to the perpendicular axis, and RHand RHrespectively represent the minimum and the maximum value of the minimum radius of curvature corresponding to the parallel axis.

Shadow mask for cathode ray tube

A mask assembly for a Cathode Ray Tube (CRT) includes a shadow mask with a plurality of beam passage holes, and a frame including a supporting portion with a pair of long sides and a pair of short sides which fix the shadow mask and a strength maintenance portion bent from the supporting portion. The frame includes a plurality of reinforcement indentations formed on a portion of the boundary between the supporting portion and the strength maintenance portion. At least one of the reinforcement indentations satisfies the following condition: wherein Srepresents an area of a triangle defined by a width of the supporting portion including the reinforcement indentation, a width of the strength maintenance portion including the reinforcement indentation and an imaginary line connecting an end of the supporting portion and an end of the strength maintenance portion, and wherein Srepresents a sectional area of the reinforcement indentation.

Mask assembly for cathode ray tube (CRT)

An inner shield for a cathode ray tube includes a screen opening and an electron gun opening through which electron beams pass, and a main body including a pair of long sections and a pair of short sections interconnected to form the screen opening and the electron gun opening. A cathode ray tube includes the inner shield. Each of the short sections includes a cutaway section having a pair of first cutaway sections formed starting from the electron gun opening and extending at a predetermined angle for a predetermined distance toward the screen opening, and a second cutaway section formed starting from where the first cutaway sections end and extending inwardly toward the screen opening, the second cutaway section being formed to extend past imaginary lines formed from where the first cutaway sections end to a furthermost inward point of the second cutaway section, that is, the point of the second cutaway section closest to the screen opening.

Inner shield and cathode ray tube including the same

A tension mask cathode ray tube has a vacuum tube and an inner shield mounted within the vacuum tube to shield the vacuum tube from geomagnetism. A value Br/Hc of the inner shield where Br indicates a residual magnetic flux density and Hc indicates a coercive force is established to be 1.0-2.0 times more than a value Br/Hc of the mask frame. In this structure, the route of electron beams is established to be more precise. Consequently, the purity characteristic and the convergence characteristic are improved while forming a precise raster. In this way, the display screen quality can be enhanced.

Tension mask with inner shield structure for cathode ray tube

A cathode ray tube includes a panel having a front screen portion on which a phosphor screen is formed and a panel flange formed on an edge of the front screen portion; a funnel connected to the panel flange; a deflection yoke disposed around the funnel; a neck connected to the funnel, an electron gun disposed in the neck; a color selection apparatus for selecting electron beams emitted from the electron gun and allowing the selected electron beams to land on corresponding phosphors, the color selection apparatus including a frame having a pair of supporting members disposed at a predetermined distance from each other in parallel and a pair of elastic members fixed on both ends of the supporting members to correspond to the lateral sides of the mask; and a shield apparatus for shielding geomagnetism, the shield apparatus being mounted on a circumference of the frame of the color selection apparatus and extended toward the neck. The shield apparatus includes disconnection parts defined corresponding to the corners of the frame, the shield apparatus being extended toward the phosphor screen over one of longitudinal and lateral sidewalls of the frame.

Cathode ray tube with structure for preventing electron beam mis-landing caused by geomagnetism

Cathode-ray tube with reduced moir&eacute; effect and a particular ratio of scanning pitches to aperture pitches

Growing community of inventors

Suwon-si, South Korea

Jong-Heon Kim