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Method for manufacturing fluorescent screen

A fluorescent screen and fluorescent technology, applied in cold cathode manufacturing, tube/lamp screen manufacturing, electrode system manufacturing, etc., can solve problems such as inability to share production lines, reduced production volume, and waste of transfer film

Inactive Publication Date: 2006-07-05
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the traditional flat panel CRT 110 without icon area and the icon CRT cannot share the production line in the steps of making their respective fluorescent screens.
Also, there is a problem that conventionally used transfer film will be discarded
Secondly, since the fluorescent screen is molded at one time, if a defect occurs only in a part (for example, only in the fluorescent area 123 shown by the icon), this defect is considered to be a defect of the entire fluorescent screen, thereby reducing the production yield.

Method used

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  • Method for manufacturing fluorescent screen
  • Method for manufacturing fluorescent screen
  • Method for manufacturing fluorescent screen

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0036] First, the main reference figure 2 with 3, describes the structure of the flat panel type CRT manufactured by the phosphor screen manufacturing method according to the first embodiment of the present invention. A reflection type CRT is shown in the figure as an example of a flat type CRT. also, figure 2 is along image 3 A cross-sectional view cut along the I-I line in .

[0037] The flat type CRT 30 includes: a panel 31 , a front panel 32 and a funnel portion 33 . The screen plate 31, the front plate 32 and the funnel portion 33 are made of a material such as transparent glass, and the integral structure of these three panels forms a flat glass tube body.

[0038] At the rear end of the funnel portion 33, an electron gun 35 for emitting electron beams EB is provided. The inner wall of the funnel portion 33 is coated with an inner conductive film 53 made of, for example, a carbon film. The inner conductive film 53 is electrically connected to an anode terminal ...

no. 2 example

[0079] Next, a second embodiment of the present invention will be described. In the following description, similar reference numerals are used for similar components to those in the first embodiment, and will not be described again here. Also, substantially the same manufacturing steps as in the first embodiment will not be described again.

[0080] In the first embodiment, as figure 2 As shown, the conductive layer 15 of the phosphor screen 50 becomes a continuous layer shared between the first phosphor area 51 and the second phosphor area 52 . Therefore, the conductive layer 15 is laminated only in the first transfer film 1 (see FIGS. 4A and 5A ), but not in the second transfer film 2 (see FIGS. 4B and 5B ).

[0081] On the other hand, in this embodiment, as shown in FIGS. 10B and 11B , when fabricating the phosphor screen 50 , similarly to the case of the first transfer film 1 , a second transfer film including the conductive layer 25 laminated therein is used. Film 2A....

no. 3 example

[0093] Next, a third embodiment of the present invention will be described. In the following description, similar reference numerals are used for similar components to those in the first embodiment and the second embodiment, and will not be described again here. Also, substantially the same manufacturing steps as in the first embodiment and the second embodiment will not be described again.

[0094] In the second embodiment, the second fluorescent region 52 is formed such that it completely covers the conductive layer 25 on the conductive layer 15 which is shared with the first fluorescent region 51 . On the other hand, in the present embodiment, the first phosphor region 51 and the second phosphor region 52 are formed such that their conductive layers partially overlap each other.

[0095] In this embodiment, in forming the phosphor screen 50, two transfer films 1A and 2B as shown in FIGS. 13A and 13B are used. The composition of the transfer films 1A and 2B and the cross-s...

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PUM

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Abstract

The subject of the present invention is to enable formation of a fluorescent surface with superior productivity by a transfer printing method, and in particular, to realize a common part with the conventional forming process of the fluorescent surface, that has only one fluorescent substance part. The solution is: a first fluorescent substance part (51) and a second fluorescent substance part (52) are formed in separate processes by a transfer printing method, using two transfer films (1, 2). Thereby, the conventional transfer film, which has been used for the ordinary flat cathode-ray tube (CRT) having no icon display region, can still be used as a first transfer film (1) as it is. Also, a part of the manufacturing line of the conventional flat cathode-ray tube (CRT) having no icon display region can be made common with respect to the forming process of the fluorescent surface. As compared with the case of forming the fluorescent surface as one lot by one transfer film, correction of only one process can do, even if either one of the forming processes of the first and the second fluorescent substance parts produce failures, thus the yield of manufacture can be improved.

Description

technical field [0001] The invention relates to a method for making a fluorescent screen with a plurality of fluorescent regions, in particular to a method for making a fluorescent screen by transfer printing. Background technique [0002] Conventionally, cathode ray tubes (CRTs) have been widely used in televisions and various monitoring equipment. The cathode ray tube irradiates electron beams from an electron gun installed in the tube (inside the cathode ray tube) onto a phosphor screen, and a scanning screen corresponding to the scanning of the electron beams is formed on the surface of the tube. CRTs are broadly classified into two types: linear and flat panel. In a linear cathode ray tube, the electron gun is positioned such that the exit of its electron beam faces the phosphor screen so that the emitted electron beam is nearly perpendicular to the center of the phosphor screen. On the other hand, in a flat-type cathode ray tube, the electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/20H01J9/227H01J31/12
CPCH01J31/15
Inventor 佐佐木健古井浩一
Owner SONY CORP