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Manufacturing method of color cathode ray tube and exposure device used for the manufacturing method

A technology of cathode ray tube and manufacturing method, which is applied in the direction of photolithographic exposure device, cathode ray tube/electron beam tube, cold cathode manufacturing, etc., can solve problems such as thermal deformation of shadow mask, achieve uniformity and improve work efficiency , The effect of suppressing fluctuations in light output

Inactive Publication Date: 2007-04-04
HITACHI DISPLAYS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a color cathode ray tube employing such a thin-walled shadow mask, a part of the shadow mask is thermally deformed during operation, and a phenomenon called mask doming tends to occur such that the electron beam spot deviates from a predetermined position on the phosphor surface.

Method used

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  • Manufacturing method of color cathode ray tube and exposure device used for the manufacturing method
  • Manufacturing method of color cathode ray tube and exposure device used for the manufacturing method
  • Manufacturing method of color cathode ray tube and exposure device used for the manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0060] A color cathode ray tube includes a panel portion having a fluorescent surface on an inner surface, and a shadow mask having a plurality of electron beam passing holes disposed facing the fluorescent surface on the inner surface of the panel portion, the fluorescent surface having a plurality of openings formed therein. A black matrix film and three types of phosphor pixels arranged in the opening of the black matrix film.

[0061] 1 and 2 are views for explaining a method of manufacturing a color cathode ray tube according to the present invention. FIG. 1 is a schematic plan view showing an example of an exposure apparatus, and FIG. 2 is a sectional view taken along line A-A of FIG. 1 . In Fig. 1 and Fig. 2, 11 is an exposure light source device, the details of which will be described later. 12 is graded filter, 13 (13C, 13S1, 13S2) is partial correction filter for monochrome, 14 is partial correction filter for multicolor, 15 is common correction lens, 16 (16C, 16S1, ...

Embodiment 2

[0098] 12 is a schematic cross-sectional view of another example of an exposure apparatus for explaining a method of manufacturing a color cathode ray tube according to the present invention, and the same reference numerals are assigned to the same parts as those in the above-mentioned drawings.

[0099] In FIG. 12 , when exposing a flat panel whose outer surface is substantially flat and whose peripheral portion is thicker than the central portion, the distance between the exposure light source 111 and the monochrome correction lens 16 during exposure is set to be H6. , and the common correction lens 15 is disposed on the side closer to the panel portion 18 than the monochrome correction lens 16, and the distance H5 between the common correction lens 15 and the exposure light source 111 is set to be greater than the distance H6.

[0100] Here, the above-mentioned exposure light source device 11 of this embodiment has the same configuration as that of the above-mentioned first ...

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Abstract

In a manufacturing method of a color cathode ray tube, as an exposure light source which is used in the exposure for forming a phosphor screen, an ultra-high pressure mercury lamp having an arc length of 35 to 60 mm is used. According to the present invention, it is possible to make an aperture shape of a black matrix film of a color cathode ray tube uniform and it is also possible to enhance the operational efficiency.

Description

technical field [0001] This invention relates to the manufacture of color cathode ray tubes, and more particularly to phosphor face forming exposure. Background technique [0002] A color cathode ray tube, such as a color cathode ray tube used in a color TV set, a color display for an OA equipment terminal, etc., adopts such a structure that an approximately rectangular panel portion having a fluorescent surface on the inner surface is used, and an approximately rectangular area for accommodating an electron gun is used. The cylindrical neck and the substantially funnel-shaped funnel form a vacuum envelope, and in the vacuum envelope, a shadow mask of a color selection electrode having a plurality of electron beam passing holes is disposed facing and close to the fluorescent surface. The phosphor surface includes a black matrix (BM) film and many phosphor pixels in the form of dots or stripes. The funnel is connected to the neck and the panel part approximately coaxially wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/227G03F7/20
CPCH01J9/244H01J29/07
Inventor 伊藤洋一无藤里志西森龙一
Owner HITACHI DISPLAYS