JPS57199376A - Character graphic displaying circuit - Google Patents

Character graphic displaying circuit

Info

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
Application number
JP56084339A
Other languages
Japanese (ja)
Inventor
Toshiyuki Kurita
Masutomi Oota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56084339A priority Critical patent/JPS57199376A/en
Publication of JPS57199376A publication Critical patent/JPS57199376A/en
Pending legal-status Critical Current

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  • 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
JP56084339A 1981-06-03 1981-06-03 Character graphic displaying circuit Pending JPS57199376A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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