JPS57199145A - Color picture tube - Google Patents
Color picture tubeInfo
- Publication number
- JPS57199145A JPS57199145A JP8525381A JP8525381A JPS57199145A JP S57199145 A JPS57199145 A JP S57199145A JP 8525381 A JP8525381 A JP 8525381A JP 8525381 A JP8525381 A JP 8525381A JP S57199145 A JPS57199145 A JP S57199145A
- Authority
- JP
- Japan
- Prior art keywords
- mask
- state
- shadow
- phosphor
- doming effect
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
- H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
PURPOSE:To make color balance of a shadow-mask-type color picture tube having an in-line-type electron gun to hardly get worse even when doming effect develops. CONSTITUTION:When electron beams bump against the entire surface of a shadow mask 3 and the temperature of the shadow mask 3 reaches to around 60 deg.C, the shadow mask 3 alters from the cold state (Ta) into the state (Tb) due to the thermal expansion, and the distance (Q) between a screen 2 and the mask 3 at the center of a panel 1a changes from (Qa) to (Qb). As the result, the position of one small hole 3a of the mask 3 moves from (Pa) to (Pb) due to the temperature rise, and doming effect develops. In order to prevent the above doming effect, the reaching points of electron beams (BB), (GB) and (RB) as indicated in figure (A) are regulated so that they include, respectively, phosphor dot or phosphor stripe trios (BS), (GS) and (RS) formed on the middle part between the center and the periphery of a fluorescent screen. As the result, glittering part of the phosphor emits light almost homogeneously without causing such unbalance as the conventional one, although a state as indicated in figure (B) is caused due to the components of the horizontal shift and the grouping shift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8525381A JPS57199145A (en) | 1981-06-01 | 1981-06-01 | Color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8525381A JPS57199145A (en) | 1981-06-01 | 1981-06-01 | Color picture tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57199145A true JPS57199145A (en) | 1982-12-07 |
Family
ID=13853403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8525381A Pending JPS57199145A (en) | 1981-06-01 | 1981-06-01 | Color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57199145A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03236140A (en) * | 1990-02-13 | 1991-10-22 | Mitsubishi Electric Corp | Fluorescent screen structure for color cathode-ray tube |
-
1981
- 1981-06-01 JP JP8525381A patent/JPS57199145A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03236140A (en) * | 1990-02-13 | 1991-10-22 | Mitsubishi Electric Corp | Fluorescent screen structure for color cathode-ray tube |
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