Videocolor

Thomson Licensing S.a.

Pierluigi Testa

Joseph Arthur Reed

Fabrizio Berton

Ivano Domenicali

Enzo Arata

Massimo De Marino

Color cathode-ray tube comprising a color selection mask () placed on a metal frame (), the said frame comprising, on at least two opposite sides, means of damping vibrations of the mask, of the type comprising two masses () connected to the surface of the frame by a connection having a mechanical clearance between the facing surfaces of the mask and of the frame.

Vibration absorber device for color cathode-ray tube

A color cathode ray tube comprises a color selection mask stretched in at least one direction, the mask comprising on its peripheral surface mask vibration damper means in the form of a coupled oscillator of the type comprising a central part attached to the surface of the mask and two wings extending on either side of the central part.

Frame/mask structure for cathode ray tube

A cathode ray tube comprising a color selection mask made from a material in tension and having a relatively low coefficient of thermal expansion, supported by a frame made from a material having a higher coefficient of thermal expansion. Along at least two sides of the frame are disposed two metal inserts made from a material whose coefficient of thermal expansion is similar to that of the mask. The inserts are secured to the opposed sides of the frame at their middle, and the mask is welded to the inserts. The mechanical problems relating to the differences in expansion of the materials making up the mask and the frame, during the high-temperature tube manufacturing steps, are avoided.

Cathode ray tube having a frame/mask assembly

Color television tube provided with a perforated mask and three aligned electron guns, the openings of the mask far from the center of the mask having a major axis inclined with respect to the vertical, the inclination .alpha. increasing with the distance from the center and this inclination being in the direction opposite to that of the image of a non-inclined slot of the mask that would be produced on the screen, by an optical projection system simulating the tube deflector.

Mask type color television tube and method of manufacturing the same

Device for illuminating photosensitive light hardenable material for the manufacture of a perforated mask type color cathode ray tube, wherein this device comprises a laser, a light modulator and a deflector to deflect the modulated pencil of light, the light modulator and the deflector being controlled by a computer so that the luminous intensity received by each point of the screen is substantially constant.

Growing community of inventors

Rome, Italy

Pierluigi Testa