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Cathode ray tube

A cathode ray tube, notch technology, applied in the direction of cathode ray tube/electron beam tube, discharge tube, electrical components, etc., can solve problems such as increased material cost

Inactive Publication Date: 2004-01-14
MERIDIAN SOLAR & DISPLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0028] On the other hand, in order to reduce the doming effect, the support spring 11 between the shadow mask frame 9 and the panel 3 for reducing the thermal expansion of the shadow mask frame 9 can be made of two materials with different thermal expansion coefficients, but if the support spring is made of different material, the cost of the material increases

Method used

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  • Cathode ray tube
  • Cathode ray tube
  • Cathode ray tube

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Embodiment Construction

[0043] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0044] As mentioned above, due to the thermal expansion of the mask and mask frame, a doming effect is produced in the cathode ray tube.

[0045] Here, when the cathode ray tube is energized, the doming effect by the thermal expansion of the shadow mask occurs within about two minutes, which contributes less to the reduction in the quality of the cathode ray tube.

[0046] However, the shadow mask doming effect caused by the thermal expansion of the shadow mask frame is larger than the doming effect caused by the thermal expansion of the shadow mask, and because it lasts for as long as 2-25 minutes after the cathode ray tube is energized, this has great influence on the production of cathode ray tubes. The reduction in the beam matching performance of the tube and the color purity of the screen is more affected.

[0047]The doming effect of ...

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Abstract

A cathode ray tube including a shadow mask which is composed of a effective portion having a plurality of holes through which an electron beam passes and a skirt portion extended approximately in a perpendicular direction to the effective portion, wherein a guiding notch is formed in the skirt portion, the guiding notch includes an end portion which is formed to be opened to the end of the skirt portion and a fixing portion to which a guiding means is fixed, and a width of the end portion is wider than the diameter of the fixing portion. Therefore, the doming effect of the shadow mask is reduced and performance of press processing of the shadow mask can be improved.

Description

technical field [0001] The present invention relates to a cathode ray tube, and more particularly to a cathode ray tube capable of reducing the doming effect of a shadow mask and improving the moldability of the shadow mask. Background technique [0002] In general, a cathode ray tube is a device that forms optical images by converting electrical signals into electron beams and emitting the electron beams onto a fluorescent surface. With its superior cost performance, cathode ray tubes have been widely used. [0003] A cathode ray tube will be described below with reference to the drawings. [0004] figure 1 A schematic diagram of a cathode ray tube is shown [0005] Such as figure 1 As shown, the cathode ray tube includes a panel 3, i.e. a front glass; a glass bulb 2, i.e. a rear glass, which is connected to the panel 3 to form a vacuum; a fluorescent surface 13 coated on the inner surface of the panel 3 as a luminescent material; The electron gun 6 that emits the elec...

Claims

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Application Information

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IPC IPC(8): H01J29/07
CPCH01J2229/0772H01J29/073H01J29/07
Inventor 金溶根
Owner MERIDIAN SOLAR & DISPLAY