JPS5487112A - Crt luminance control system - Google Patents
Crt luminance control systemInfo
- Publication number
- JPS5487112A JPS5487112A JP15512277A JP15512277A JPS5487112A JP S5487112 A JPS5487112 A JP S5487112A JP 15512277 A JP15512277 A JP 15512277A JP 15512277 A JP15512277 A JP 15512277A JP S5487112 A JPS5487112 A JP S5487112A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- luminance
- correction
- control system
- luminance control
- 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
- Exposure Or Original Feeding In Electrophotography (AREA)
- Projection-Type Copiers In General (AREA)
- Television Receiver Circuits (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Abstract
PURPOSE: To prevent the variation in the print darkness in an electronic photography unit, by stabilizing the luminance through the correction automatically for detecting the variation in the luminance of CRT.
CONSTITUTION: The output voltage from the photo detection element 2 detecting the luminance of CRT1 and the reference voltage are compared 5, the correction voltage gradually increasing or decreasing based on the result of comparison is produced 8, and the luminance correction 4 is made by adding the correction voltage to the luminance voltage. Further, the correction voltage is generated so that the output voltage from the photo detection element 2 and the reference voltage can almost be in agreement with each other.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52155122A JPS5832381B2 (en) | 1977-12-23 | 1977-12-23 | CRT brightness control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52155122A JPS5832381B2 (en) | 1977-12-23 | 1977-12-23 | CRT brightness control method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5487112A true JPS5487112A (en) | 1979-07-11 |
JPS5832381B2 JPS5832381B2 (en) | 1983-07-12 |
Family
ID=15599038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52155122A Expired JPS5832381B2 (en) | 1977-12-23 | 1977-12-23 | CRT brightness control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5832381B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5831587U (en) * | 1981-08-26 | 1983-03-01 | 横河電機株式会社 | CRT display device |
JPS6139688A (en) * | 1984-07-30 | 1986-02-25 | Tokyo Denshi Kogyo Kk | Cathode-ray tube controller and information collection device therefor |
JPS63125932A (en) * | 1986-09-15 | 1988-05-30 | ゼネラル・エレクトリック・カンパニイ | Method and apparatus for equalizing video image and film image |
-
1977
- 1977-12-23 JP JP52155122A patent/JPS5832381B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5831587U (en) * | 1981-08-26 | 1983-03-01 | 横河電機株式会社 | CRT display device |
JPS6139688A (en) * | 1984-07-30 | 1986-02-25 | Tokyo Denshi Kogyo Kk | Cathode-ray tube controller and information collection device therefor |
JPH0313589B2 (en) * | 1984-07-30 | 1991-02-22 | Tokyo Electronic Ind Co | |
JPS63125932A (en) * | 1986-09-15 | 1988-05-30 | ゼネラル・エレクトリック・カンパニイ | Method and apparatus for equalizing video image and film image |
Also Published As
Publication number | Publication date |
---|---|
JPS5832381B2 (en) | 1983-07-12 |
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