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Crt having a tension mask with vibration damping mean

A cathode ray tube and attenuation device technology, applied in the direction of cathode ray tube/electron beam tube, discharge tube, electrical components, etc., can solve the problem that the attenuation device is difficult to realize complex structure

Inactive Publication Date: 2006-06-28
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the attenuation device employed in this patent has a complex structure that is difficult to realize

Method used

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  • Crt having a tension mask with vibration damping mean
  • Crt having a tension mask with vibration damping mean
  • Crt having a tension mask with vibration damping mean

Examples

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Embodiment Construction

[0017] Such as figure 1 As shown, a cathode ray tube (CRT) 1 according to the present invention includes a substantially flat face plate 2 and a peripheral cover 3 . The panel 2 is bonded to the funnel 4 by a glass frit sealant. The end portion 5 of the picture tube surrounds an electron gun 6 from which the electron beams illuminate a luminescent phosphor screen 13 through a color selection mask 8 which in this case is flat, for example stretched between the long sides 9 of the frame 19 . The metal support of the visor / frame assembly holds the assembly in place in the picture tube, said support may have a part 10 welded to the frame 19 and a spring like part with a groove to engage a pin 12 contained in the glass cover 11.

[0018] exist figure 2 In the illustrated prior art example, the frame 19 comprises a pair of long sides 9 and a pair of short sides 7, said long sides and short sides having, for example, an L-shaped cross-section. The visor 8 , which is itself appr...

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PUM

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Abstract

Color cathode-ray tube comprising a color selection mask tensioned in at least one direction, the mask having, on its peripheral area, mask-vibration damper means in the form of a coupled oscillator of the type comprising a metal strip whose ends are welded to the surface of the mask and whose central region comes into contact with the surface of the mask by a spring effect.

Description

technical field [0001] This invention relates generally to cathode ray tubes and more particularly to the construction of a color selection mask capable of damping vibrations of the mask. Background technique [0002] A conventional cathode ray tube has a color selection mask located at a precise distance inside the glass panel of the picture tube, on which an array of red, green and blue phosphors are deposited to form the screen. An electron gun placed at the rear of the picture tube produces three beams of electrons directed at the panel. An electromagnetic deflection device, usually placed outside the picture tube and close to the electron gun, has the function of deflecting the electron beams so that they scan the surface of the panel on which the array of phosphors has been arrayed. Under the influence of each of the three electron beams corresponding to the defined basic color, the phosphor powder array reproduces the image on the screen, and the mask makes each defi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J29/07
CPCH01J29/07H01J2229/0744H01J29/02
Inventor 法布里齐奥·福尔纳里斯特凡诺·内奇法布里齐奥·贝尔东西尔维奥·圣温琴佐
Owner THOMSON LICENSING SA