JPS57107678A - Convergence measuring method - Google Patents
Convergence measuring methodInfo
- Publication number
- JPS57107678A JPS57107678A JP18286480A JP18286480A JPS57107678A JP S57107678 A JPS57107678 A JP S57107678A JP 18286480 A JP18286480 A JP 18286480A JP 18286480 A JP18286480 A JP 18286480A JP S57107678 A JPS57107678 A JP S57107678A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent substance
- luminance
- allowing
- electron beam
- color
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
PURPOSE:To enable to measure shift of convergence accurately, by deflecting electron beam radiated on fluorescent layer of an in-line type color picture tube minutely longitudinally or laterally, and measuring the peak points through the use of a luminance detector. CONSTITUTION:First, a color picture tube 30 is made to non-deflection state and tri-color fluorescent substance at the center of a panel 31 is illuminated with each electron beam. A luminance detector 36 consisting of a slit plate 32 and a photo multiplier 34 is aligned on the fluorescent substance layer to be measured. Next, a deflection voltage of triangle waveform horizontally or vertically is given to a deflection yoke 37 from a minute deflector 38 and electric signals from the deflector 38 and the photo multiplier 34 are inputted to X and Y axes, allowing to obtain a luminance distribution waveform 18 as to blue color. When a luminance detector 36 is shifted by a pitch of the fluorescent substance for the similar operation, allowing to obtain green and red luminance distribution waveforms 19 and 20. Unskillful person can measure the shift of convergence accurately and simply by reading the difference among the peak points PB, PG and PR.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18286480A JPS57107678A (en) | 1980-12-25 | 1980-12-25 | Convergence measuring method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18286480A JPS57107678A (en) | 1980-12-25 | 1980-12-25 | Convergence measuring method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57107678A true JPS57107678A (en) | 1982-07-05 |
Family
ID=16125770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18286480A Pending JPS57107678A (en) | 1980-12-25 | 1980-12-25 | Convergence measuring method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57107678A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4635095A (en) * | 1983-03-25 | 1987-01-06 | Videocolor | Method for measuring the convergence of a three-gun shadow-mask cathode-ray tube and a device for the application of said method |
EP0247627A2 (en) * | 1986-05-29 | 1987-12-02 | Hitachi, Ltd. | Misconvergence amount measuring apparatus |
JPH01239735A (en) * | 1988-03-18 | 1989-09-25 | Hitachi Ltd | Convergence error measuring device |
JPH01239734A (en) * | 1988-03-18 | 1989-09-25 | Hitachi Ltd | Horizontal convergence error measuring device |
-
1980
- 1980-12-25 JP JP18286480A patent/JPS57107678A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4635095A (en) * | 1983-03-25 | 1987-01-06 | Videocolor | Method for measuring the convergence of a three-gun shadow-mask cathode-ray tube and a device for the application of said method |
EP0247627A2 (en) * | 1986-05-29 | 1987-12-02 | Hitachi, Ltd. | Misconvergence amount measuring apparatus |
JPH01239735A (en) * | 1988-03-18 | 1989-09-25 | Hitachi Ltd | Convergence error measuring device |
JPH01239734A (en) * | 1988-03-18 | 1989-09-25 | Hitachi Ltd | Horizontal convergence error measuring device |
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