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Method for preparing curved surface of shaped mask

A technology of curved surface and shadow mask, applied in the field of preparation of curved surface of formed shadow mask

Inactive Publication Date: 2003-10-08
CAIHONG GRP ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Z height change ΔZ=6.339-6.080=0.259 at the corresponding point of the forming shadow mask

Method used

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  • Method for preparing curved surface of shaped mask
  • Method for preparing curved surface of shaped mask

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The range of coefficients of the curvature calculation formula of embodiment 1 curved surface allowance is: A1=0.08E-4~40E-4 A2=-0.08E-9~-25E-9 A3=0.8E-4~40E-4A4=-0.08 E-9~-30E-9 A5=0.08E-8~40E-8 A6=0.08E-12~40E12A7=0.08E-12~30E-12 A8=-0.08E-17~-50E-17 X, Y It is coordinate value B1=0.6E-4~25E-4 B2=-0.1E-9~-20E-9 B3=0.8E-4~40E-4B4=-0.9E-9~-20E-9 B5=- 0.8E-8~-30E-8 B6=0.8E-12~40E-12B7=0.8E-12~40E-12 B8=-0.8E~-50E-17 Curvature calculation formula coefficient of reserved amount of curved surface in embodiment 2 The range is: A1=0.1E-4~30E-4 A2=-0.1E-9~-20E-9 A3=2E-4~30E-4A4=-0.1E-9~-20E-9 A5=0.1E- 8~30E-8 A6=0.1E-12~30E-12A7=0.1E-12~30E-12 A8=-0.1E-17~-40E-17 B1=1.0E-4~20E-4B2=-0.1E -9~-15E-9 B3=1.5E-4~30E-4B4=-1.5E-9~-10E-9 B5=-1.5E-8~-20E-8 B6=2.0E-12~30E-12B7 =1.8E-12~30E-12 B8=-1.5E-17~-40E-17

Embodiment 3

[0012] The curvature calculation formula coefficient of embodiment 3 curved surface reserve amount is: A1=0.1E-4~30E-4 A2=-0.1E-9~-20E-9 A3=2E-4~30E-4A4=-0.1E- 9~-20E-9 A5=0.1E-8~30E-8 A6=0.1E-12~30E-12A7=0.1E-12~30E-12 A8=-0.1E-17~-40E-17B1=0.1E -4~30E-4 B2=-0.01E-9~-30E-9 B3=0.1E-4~50E-4B4=-0.01E-9~-30E-9 B5=-0.01E-8~-40E- 8 B6=0.01E-12~50E-12B7=0.01E-12~50E-12 B8=-0.1E-17~-60E-17

[0013] screen position

a1

μm

b1

μm

G1

Z1

mm

center

400

600

1.0

0

2

500

760

0.986

8

8.90

8

3

515

750

1.03

6.33

9

5

510

770

0.993

5

8.90

8

6

405

610

0.995

9

3.26

0

8

520

780

1.000

8.90

8

9

520

750

1.04

6.33

9

10

500

750 ...

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PUM

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Abstract

The method for preparing curved surface of shaped mask includes the calculating curved surface, connection between the two ends of the curve surface and the upper end part of the bracket, as well as the connection between the bottom plate of the bracket and the base plate. Under conditions of not changing sizes of parts, assembling sizes and technological procedures, the curved surface of shaped mask is designed and made according to the formula and parameters provided in the invention. With being backen and after thermal stability, the curved surface of shaped mask possesses smooth surface and guarantees the chromatic purity, high quality of images, ensuring well-ordered assortments of electron beams and black background and making the red, green and blue three-color phosphor strips and electron beams arrange on full screen of color visual display tube uniformly.

Description

[0001] 1. Technology area [0002] The invention relates to a method for preparing a curved surface of a shadow mask, and is particularly suitable for a calculation method for the reserve amount of a curved surface of a shadow mask formed by a color picture tube cathode ray tube. 2. Background technology [0003] In the color picture tube, the formed shadow mask is a curved metal sheet with certain changing rules, and there are several focusing holes for the three-color electron beams to pass through. The focusing holes allow the three-color electron beams generated by the color cathode ray tube electron gun to pass through the focus The holes are accurately projected on the corresponding fluorescent powder strips on the inner surface of the screen. During the processing of the color picture tube (after blackening and thermal stabilization), there will be local changes in the surface of the formed shadow mask in the prior art, and there will be deviations from the designed shad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/14
Inventor 赵军徐莉华窦秀英俞敏
Owner CAIHONG GRP ELECTRONICS CO LTD