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

Colour CRT with improved shadow mask supporting structure

A cathode ray tube, color technology, applied in the direction of cathode ray tube/electron beam tube, discharge tube, electrical components, etc.

Inactive Publication Date: 2005-05-18
HITACHI LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, as the screen size of color cathode ray tubes has increased in recent years, the weight of the shadow mask structure, especially the support frame, has increased, and it is difficult for the above-mentioned plate-shaped suspension springs to properly support the shadow mask structure and sufficiently compensate for Positional deviation due to thermal expansion of the structure (so-called hemispherization or similar)

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
  • Colour CRT with improved shadow mask supporting structure
  • Colour CRT with improved shadow mask supporting structure
  • Colour CRT with improved shadow mask supporting structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Figure 8 is a cross-sectional view of an essential part of the panel portion of a conventional color cathode ray tube, taken along a plane parallel to its tube axis, for illustrating the condition of the shadow mask structure installed in the panel portion; in Figure 8 In , reference numeral 1 denotes a panel portion, and stud bolts 9 are inserted into the peripheral inner wall (panel skirt portion) of the panel portion 1 at the corners of the panel portion 1 .

[0028] A phosphor screen 4 is formed on the inner surface of said panel portion 1 as a screen, said phosphor screen consisting of mosaic photocathodes emitting phosphor regions of different colors. The bottom part 81 of the suspension spring 8 is fixed to the support frame 7 of the shadow mask structure, and the engaging hole formed in the spring part 82 of the suspension spring 8 engages the stud 9, whereby the shadow mask 6 is arranged at a specified distance from the fluorescent screen 4. distance.

[00...

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

A color cathode ray tube includes a shadow mask structure consisting of a frame, a shadow mask connected to the frame, suspension springs connected to the frame and a skirt portion inserted into its panel portion stud bolts. Each suspension spring consists of: a bottom member, which includes a portion connected to the frame; a ramp portion, extending from the portion to the skirt portion; and a first connection portion, extending from the the ramp portion extends axially; and a spring member comprising a second connecting portion fixed to the first connecting portion, an elastic ramp portion extending from the second connecting portion at an angle of inclination θ, and a stud engaging portion extending from the second connecting portion The elastic portion extends and forms a hole for engagement with one of the plurality of studs, where 0°≤θ≤10°. The length L of the elastic part satisfies 20mm≤L≤the axial length of the frame.

Description

technical field [0001] The present invention relates to a color cathode ray tube of the shadow mask type, and more particularly to a color cathode ray tube of this type having a shadow mask supported at its corners. Background technique [0002] As an image or video display device, a shadow mask type color cathode ray tube using a shadow mask formed with a large number of electron transmission holes and electrodes serving as color selection is widely used. [0003] This type of color cathode ray tube has an approximately rectangular panel portion having a spherical, planar or approximately planar outer surface and an inner surface which is convex toward the outer surface. A fluorescent screen is formed on the inner surface of the panel portion, and the fluorescent screen is formed of fluorescent elements of a plurality of colors (usually red, green and blue) in the form of dots, continuous strips or slots. [0004] An electron gun is used to emit multiple (usually three) el...

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 Patents(China)
IPC IPC(8): H01J29/02H01J29/07
CPCH01J29/073H01J2229/0711H01J29/07
Inventor 伊藤洋一
Owner HITACHI LTD