JPS57199376A - Character graphic displaying circuit - Google Patents
Character graphic displaying circuitInfo
- Publication number
- JPS57199376A JPS57199376A JP56084339A JP8433981A JPS57199376A JP S57199376 A JPS57199376 A JP S57199376A JP 56084339 A JP56084339 A JP 56084339A JP 8433981 A JP8433981 A JP 8433981A JP S57199376 A JPS57199376 A JP S57199376A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- memory
- address
- display
- superimposed
- 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
- Television Systems (AREA)
Abstract
PURPOSE: To reduce a circuit scale, by designating a position for superimposed display by a prescribed block unit, storing it in a memory, reading out its stored information, and controlling the superimposed position of a TV picture by its readout designated information.
CONSTITUTION: When writing, an address bus 13 is selected by a multiplexer 18 in accordance with a switching signal 32, and an address signal 16 is outputted. From a microprocessor connected to this bus 13, to an address of each subblock of the display picture, H and L are outputted by synchronizing with the signal 16, in case when its position is on the superimposed display, and in other case, respectively. Subsequently, the signal 16 is stored in a color memory 37, and when it is readout from the memory 37, a display signal 20 is selected and outputted by the multiplexer 18, and the address signal 16 is applied to the memory 37. Subsequently, together with the signal 20 and a color signal 17, a superimposing gate signal 38 is readout simultaneously at every vertical synchronization, and the superimposed position of the TV picture is controlled by a simple constitution.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56084339A JPS57199376A (en) | 1981-06-03 | 1981-06-03 | Character graphic displaying circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56084339A JPS57199376A (en) | 1981-06-03 | 1981-06-03 | Character graphic displaying circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57199376A true JPS57199376A (en) | 1982-12-07 |
Family
ID=13827741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56084339A Pending JPS57199376A (en) | 1981-06-03 | 1981-06-03 | Character graphic displaying circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57199376A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01143580A (en) * | 1987-11-30 | 1989-06-06 | Matsushita Electric Ind Co Ltd | Teletext receiver |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54129830A (en) * | 1978-03-31 | 1979-10-08 | Hitachi Ltd | Data display unit |
JPS5563182A (en) * | 1978-11-06 | 1980-05-13 | Toshiba Corp | Picture compounding device |
-
1981
- 1981-06-03 JP JP56084339A patent/JPS57199376A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54129830A (en) * | 1978-03-31 | 1979-10-08 | Hitachi Ltd | Data display unit |
JPS5563182A (en) * | 1978-11-06 | 1980-05-13 | Toshiba Corp | Picture compounding device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01143580A (en) * | 1987-11-30 | 1989-06-06 | Matsushita Electric Ind Co Ltd | Teletext receiver |
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