JPS54137271A - Manufacture of shadow mask - Google Patents
Manufacture of shadow maskInfo
- Publication number
- JPS54137271A JPS54137271A JP4426978A JP4426978A JPS54137271A JP S54137271 A JPS54137271 A JP S54137271A JP 4426978 A JP4426978 A JP 4426978A JP 4426978 A JP4426978 A JP 4426978A JP S54137271 A JPS54137271 A JP S54137271A
- Authority
- JP
- Japan
- Prior art keywords
- corner
- dot
- matching line
- minor
- transmission hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
PURPOSE: To secure an easy formation of the electron beam transmission hole similar to a rectangle by carrying out the photo etching via the dot film to which the dots with corner part protruded in the acute angle are provided.
CONSTITUTION: Non-light transmissible dot 12 is provided to panel-type transparent base 11 in nearly rectangular form and in the longer-side direction via transparent bridge part 13, and adjacent to the next dot 12 at the apex of corner 14 of the acute-angle triangle. The minor dot film is as conventional to form the shadow mask. With this mask 4, groove 17 is caused across bridge part 16 in correspondence to corner 14 of the dot, and center 16c of the bridge matching line is positioned between major dot side surface 16a and minor dot side surface 16b. And corner 16d of the matching line is cut toward groove 17, and slit matching line 15c is viewed at the corner of beam transmission hole 15 which is extremely approximate to a rectangule. Furthermore, the luminance of the screen is increased since the beam coming in obliquely is not cut off by the corner.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4426978A JPS6011419B2 (en) | 1978-04-17 | 1978-04-17 | How to make a shadow mask |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4426978A JPS6011419B2 (en) | 1978-04-17 | 1978-04-17 | How to make a shadow mask |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54137271A true JPS54137271A (en) | 1979-10-24 |
JPS6011419B2 JPS6011419B2 (en) | 1985-03-26 |
Family
ID=12686788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4426978A Expired JPS6011419B2 (en) | 1978-04-17 | 1978-04-17 | How to make a shadow mask |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6011419B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2472261A1 (en) * | 1979-12-18 | 1981-06-26 | Rca Corp | COLOR IMAGE TUBE HAVING A SLIT SHADOW MASK |
JPH0240840A (en) * | 1988-07-30 | 1990-02-09 | Dainippon Screen Mfg Co Ltd | Shadow mask for color picture tube |
-
1978
- 1978-04-17 JP JP4426978A patent/JPS6011419B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2472261A1 (en) * | 1979-12-18 | 1981-06-26 | Rca Corp | COLOR IMAGE TUBE HAVING A SLIT SHADOW MASK |
JPH0240840A (en) * | 1988-07-30 | 1990-02-09 | Dainippon Screen Mfg Co Ltd | Shadow mask for color picture tube |
Also Published As
Publication number | Publication date |
---|---|
JPS6011419B2 (en) | 1985-03-26 |
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