CA2049671A1 - Color picture tube having improved shadow mask frame - Google Patents
Color picture tube having improved shadow mask frameInfo
- Publication number
- CA2049671A1 CA2049671A1 CA002049671A CA2049671A CA2049671A1 CA 2049671 A1 CA2049671 A1 CA 2049671A1 CA 002049671 A CA002049671 A CA 002049671A CA 2049671 A CA2049671 A CA 2049671A CA 2049671 A1 CA2049671 A1 CA 2049671A1
- Authority
- CA
- Canada
- Prior art keywords
- frame
- shadow mask
- corners
- section
- support means
- 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
- 238000010276 construction Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
- H01J29/07—Shadow masks for colour television tubes
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
An improved color picture tube includes an evacuated envelope having a rectangular faceplate panel. The panel includes a viewing screen on an inner surface thereof and a shadow mask-frame assembly mounted therein by support means located at the four corners of the panel. The shadow mask-frame assembly includes an apertured shadow mask and a peripheral frame to which the mask is attached. The frame has two flanges arranged in an L-shaped cross-section. The support means are attached to the corners of the frame. The improvement comprises the frame being formed by four sections that are welded together at their ends. Each section includes a side of the frame and two angled corners of the frame at the ends of the section. The sections overlap each other at their ends, with both of the flanges of each section in surface-to-surface contact with each other. With this construction, the frame has a single thickness along each of its sides and a double thickness at its corners, to provide more rigid attachment locations for the support means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT21602A/90 | 1990-09-28 | ||
| IT02160290A IT1243082B (en) | 1990-09-28 | 1990-09-28 | COLOR IMAGE DISPLAY TUBE EQUIPPED WITH A PERFECTED FRAME OF THE SHADOW MASK |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2049671A1 true CA2049671A1 (en) | 1992-03-29 |
| CA2049671C CA2049671C (en) | 2002-01-08 |
Family
ID=11184192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002049671A Expired - Fee Related CA2049671C (en) | 1990-09-28 | 1991-08-22 | Color picture tube having improved shadow mask frame |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH07118278B2 (en) |
| KR (1) | KR950007680B1 (en) |
| CA (1) | CA2049671C (en) |
| IT (1) | IT1243082B (en) |
-
1990
- 1990-09-28 IT IT02160290A patent/IT1243082B/en active IP Right Grant
-
1991
- 1991-08-22 CA CA002049671A patent/CA2049671C/en not_active Expired - Fee Related
- 1991-09-25 KR KR1019910016645A patent/KR950007680B1/en not_active IP Right Cessation
- 1991-09-27 JP JP3276998A patent/JPH07118278B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07118278B2 (en) | 1995-12-18 |
| JPH04298940A (en) | 1992-10-22 |
| IT1243082B (en) | 1994-05-23 |
| IT9021602A1 (en) | 1992-03-28 |
| KR920007054A (en) | 1992-04-28 |
| CA2049671C (en) | 2002-01-08 |
| IT9021602A0 (en) | 1990-09-28 |
| KR950007680B1 (en) | 1995-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |