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JPS54157439A - Character display unit - Google Patents

Character display unit

Info

Publication number
JPS54157439A
JPS54157439A JP6568578A JP6568578A JPS54157439A JP S54157439 A JPS54157439 A JP S54157439A JP 6568578 A JP6568578 A JP 6568578A JP 6568578 A JP6568578 A JP 6568578A JP S54157439 A JPS54157439 A JP S54157439A
Authority
JP
Japan
Prior art keywords
circuit
characters
switching
character display
circuits
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
Application number
JP6568578A
Other languages
Japanese (ja)
Other versions
JPS6161136B2 (en
Inventor
Tsuguji Tateuchi
Shigeru Hirahata
Teruhiro Takezawa
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 JP6568578A priority Critical patent/JPS54157439A/en
Priority to US06/044,379 priority patent/US4298931A/en
Priority to DE2922540A priority patent/DE2922540C2/en
Publication of JPS54157439A publication Critical patent/JPS54157439A/en
Publication of JPS6161136B2 publication Critical patent/JPS6161136B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Digital Computer Display Output (AREA)

Abstract

PURPOSE: To secure a constant display of characters on the CRT screen by switching and supplying sequentially via the address switching circuit the address signals supplied from the character display driving circuit to the memory circuits of plural systems.
CONSTITUTION: Memory circuit 9A encodes and memorizes the characters to be displayed; and memory circuit 9B memorizes the picture element information of the display characters, extracts the encoded information of the characters to be displayed from circuit 9A via the character display driver unit and reextracts the picture element information of the display characters from circuit 9B itself. In this case, the memory circuits of plural systems are provided for circuit 9A, and the address signals supplied from the character display driving circuit are switched and supplied sequentially to the circuits of plural systems via address switching circuits 8A and 8B. And the information output signals extracted from the memory circuits of plural systems are switched in synchronization with the switching actions of circuit 8A and 8B via output signal switching circuit 34. As a result, the characters can be displayed at all times on the CRT screen.
COPYRIGHT: (C)1979,JPO&Japio
JP6568578A 1978-06-02 1978-06-02 Character display unit Granted JPS54157439A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP6568578A JPS54157439A (en) 1978-06-02 1978-06-02 Character display unit
US06/044,379 US4298931A (en) 1978-06-02 1979-06-01 Character pattern display system
DE2922540A DE2922540C2 (en) 1978-06-02 1979-06-01 Data processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6568578A JPS54157439A (en) 1978-06-02 1978-06-02 Character display unit

Publications (2)

Publication Number Publication Date
JPS54157439A true JPS54157439A (en) 1979-12-12
JPS6161136B2 JPS6161136B2 (en) 1986-12-24

Family

ID=13294102

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6568578A Granted JPS54157439A (en) 1978-06-02 1978-06-02 Character display unit

Country Status (1)

Country Link
JP (1) JPS54157439A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49106243A (en) * 1973-02-09 1974-10-08
JPS5128440A (en) * 1974-09-03 1976-03-10 Matsushita Electric Ind Co Ltd DEISUPURE ISOCHI

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49106243A (en) * 1973-02-09 1974-10-08
JPS5128440A (en) * 1974-09-03 1976-03-10 Matsushita Electric Ind Co Ltd DEISUPURE ISOCHI

Also Published As

Publication number Publication date
JPS6161136B2 (en) 1986-12-24

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