JPS54146520A - Picture tube display unit - Google Patents
Picture tube display unitInfo
- Publication number
- JPS54146520A JPS54146520A JP5466278A JP5466278A JPS54146520A JP S54146520 A JPS54146520 A JP S54146520A JP 5466278 A JP5466278 A JP 5466278A JP 5466278 A JP5466278 A JP 5466278A JP S54146520 A JPS54146520 A JP S54146520A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- signals
- output
- diode
- signal
- 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
- Studio Circuits (AREA)
- Color Television Systems (AREA)
Abstract
PURPOSE: To choose the background of the monochrome screen to the intermediate brightness between the white and black and thus to secure the time display such as AM and PM by floating one information on the white background and sinking the other information into the black background.
CONSTITUTION: If character signal (b) and AM signal (c) enter input terminal 13 and 29 during period A, the current flows to resistance 28, diode 27 and resistance 26. Thus, diode 27 is turned on, and the emitter output of transistor Tr15 emerges across resistance 26. While PM signal (d) enters input terminal 25 in period B, and thus diode 21 is turned on with the collector output of Tr15 emerging across resistance 26. And the character signals are obtained in the positive and negative directions at the output in case AM and PM are displayed respectively. These signals are added to the synchronous signals at matrix circuit 23 in order to obtain the desired video signals at output terminal 31.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5466278A JPS54146520A (en) | 1978-05-09 | 1978-05-09 | Picture tube display unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5466278A JPS54146520A (en) | 1978-05-09 | 1978-05-09 | Picture tube display unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54146520A true JPS54146520A (en) | 1979-11-15 |
Family
ID=12976990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5466278A Pending JPS54146520A (en) | 1978-05-09 | 1978-05-09 | Picture tube display unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54146520A (en) |
-
1978
- 1978-05-09 JP JP5466278A patent/JPS54146520A/en active Pending
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