JPS55115245A - Projection type braun tube - Google Patents
Projection type braun tubeInfo
- Publication number
- JPS55115245A JPS55115245A JP2275879A JP2275879A JPS55115245A JP S55115245 A JPS55115245 A JP S55115245A JP 2275879 A JP2275879 A JP 2275879A JP 2275879 A JP2275879 A JP 2275879A JP S55115245 A JPS55115245 A JP S55115245A
- Authority
- JP
- Japan
- Prior art keywords
- trapezoidal shape
- screen
- short side
- fluorescent screen
- projection type
- 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.)
- Pending
Links
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
PURPOSE: To make heat radiation effectively and obtain high liminance by forming a screen portion and fluorescent screen into a trapezoidal shape.
CONSTITUTION: The screen portion 18 is formed into a trapezoidal shape and therefore the junction between the funnel portion 19 and the screen portion 18 becomes the tube 20 formed into the same trapezoidal shape and the fluorescent screen 21 is also formed into a trapezoidal shape. Since the image on the fluorescent screen 21 is contracted at the short side of the trapezoidal shape and the current density of the electron beam increases along the said short side, thereby generating move heat at the short side of the trapezoidal shape. Since the fluorescent screen 21 is in close contact with the funnel portion 19, the heat transmission can be made easily and the heat radiation can be made effectively. Thus, the current density can be made greater and therefore high luminance can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2275879A JPS55115245A (en) | 1979-02-27 | 1979-02-27 | Projection type braun tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2275879A JPS55115245A (en) | 1979-02-27 | 1979-02-27 | Projection type braun tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55115245A true JPS55115245A (en) | 1980-09-05 |
Family
ID=12091574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2275879A Pending JPS55115245A (en) | 1979-02-27 | 1979-02-27 | Projection type braun tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55115245A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55138547U (en) * | 1979-03-27 | 1980-10-02 | ||
JPS58140957A (en) * | 1982-02-15 | 1983-08-20 | Hitachi Ltd | High-accuracy color display tube |
-
1979
- 1979-02-27 JP JP2275879A patent/JPS55115245A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55138547U (en) * | 1979-03-27 | 1980-10-02 | ||
JPS5835483Y2 (en) * | 1979-03-27 | 1983-08-10 | キャノン・エヌ・ティー・シー株式会社 | Locking device for type lever in Japanese typewriter |
JPS58140957A (en) * | 1982-02-15 | 1983-08-20 | Hitachi Ltd | High-accuracy color display tube |
JPH044689B2 (en) * | 1982-02-15 | 1992-01-29 |
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