Unlock instant, AI-driven research and patent intelligence for your innovation.

Optimal inner shielding assembly used inside color CRT to shield outer magnetism

An internal shielding and component technology, applied in the direction of cathode ray tube/electron beam tube, discharge tube, electrical components, etc., can solve the problem of lack of magnetic shielding function and so on

Inactive Publication Date: 2003-02-26
LG PHILIPS DISPLAY KOREA CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a large space between the shadow mask (4) and the sub-frame (5b), and the problem is that this space does not have a magnetic shielding function

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optimal inner shielding assembly used inside color CRT to shield outer magnetism
  • Optimal inner shielding assembly used inside color CRT to shield outer magnetism
  • Optimal inner shielding assembly used inside color CRT to shield outer magnetism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Hereinafter, preferred embodiments of an inner shield assembly according to the present invention will be described in detail with reference to the accompanying drawings, and the same reference numerals are used throughout different drawings to designate the same or similar components.

[0029] Figure 6a and 6b An exploded view and an assembled view of the inner shield assembly of the outer magnetic shield structure of the color cathode ray tube according to the present invention are shown respectively.

[0030] Such as Figure 6a and 6b As shown, the inner shielding assembly (70) covers the inner surface of the funnel ( figure 1 In 2), a frame assembly (5) consisting of a main frame (5a) and a subframe (5b), and a shadow mask (4) at the rear of the frame assembly (5).

[0031] In addition, the inner shielding assembly (70) generally includes: a roughly pyramid-shaped main body (71) for shielding the inside of the funnel, a rectangular electron beam shield (72) com...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses an inner shield assembly which is capable of maximizing an external magnetism shield effect by improving a structure of the inner shield assembly and by optimizing the magnetic characteristic of component material of the improved inner shield assembly. According to the present invention, an inner shield assembly provided at the rear side of a frame assembly having a main frame and a sub-frame for shielding external magnetism including a main body for shielding the inside of a funnel, a rectangular beam shield combined to the front of the main body, and a front portion 73 formed extending from the edge to the front of the beam shield to surround the shadow mask and the frame assembly, wherein material of the front portion has maximum permeability of at least 3000 and coercivity of at most 1.25 Oe. In addition, the magnetic characteristic of each of material is adjusted to have an interrelation of 0.5<=mu 2 / mu 1<=1.5, where, maximum permeability of material of the main body 71 is mu 1 and maximum permeability of material of the front portion 73 is mu 2. In addition, the magnetic characteristic of each of material is adjusted to have an interrelation of 0.5<=H1 / H2<=3.0, where, coercivity of material of the main body 71 is H1 and coercivity of material of the front portion 73 is H2.

Description

technical field [0001] The present invention relates to an inner shielding assembly of a color cathode ray tube, in particular to such an inner shielding assembly, which makes the external magnetic field and the Changes in the magnetic field when the color cathode ray tube is turned are minimized to avoid deterioration of the color purity of the screen. Background technique [0002] figure 1 A partial cross-sectional view showing the structure of an ordinary color cathode ray tube. [0003] refer to figure 1 , the color cathode ray tube is the main part used to display images in image display devices (such as TV receivers or computer monitors), usually consisting of a panel (1) placed at the front and a funnel (2) placed at the rear consist of. [0004] In addition, the inside of the planar cathode ray tube composed of the panel (1) and the funnel (2) also includes: a phosphor screen (3) that emits light; (3) an electron gun (8) emitting light, a shadow mask (4) for col...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01J29/02H01J29/06
CPCH01J29/06
Inventor 金载烈
Owner LG PHILIPS DISPLAY KOREA CO LTD