JPS54139427A - Pattern generation circuit - Google Patents

Pattern generation circuit

Info

Publication number
JPS54139427A
JPS54139427A JP4657178A JP4657178A JPS54139427A JP S54139427 A JPS54139427 A JP S54139427A JP 4657178 A JP4657178 A JP 4657178A JP 4657178 A JP4657178 A JP 4657178A JP S54139427 A JPS54139427 A JP S54139427A
Authority
JP
Japan
Prior art keywords
characters
character
circuit
displayed
black
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
JP4657178A
Other languages
Japanese (ja)
Inventor
Yasuyo Ishikawa
Kazuo Watanabe
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 JP4657178A priority Critical patent/JPS54139427A/en
Publication of JPS54139427A publication Critical patent/JPS54139427A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To facilitate an easy recognition of the characters for the white-black inversion display by forming the pattern signals to secure the space part between the characters and lines at the up and down plus right and left areas of one character display screen.
CONSTITUTION: In case the characters are displayed at the 1st character of the 1st line of display screen 11, the information corresponding to the characters to be displayed which are written into refresh memory 2 is read out by the line and character counter output of CRT control circuit 1 showing the addresses of the line and the character to be than supplied to pattern circuit 4. Circuit 4 delivers the picture element data synchronized with the raster and the information of memory 2 in parallel via the output of the raster address counter formed at circuit 1. P/S circuit 5 performs the conversion into the picture element data via the video clock. Thus, the characters are displayed on screen 11. Here, the space part between the characters and lines is provided at the up and down plus right and left areas each in one character display screen. As a result, the clear recognition is possible for the characters with no touch with the black display blanking part shown by the oblique lines on screen 11 in case the characters are displayed in black through the white-black inverting action.
COPYRIGHT: (C)1979,JPO&Japio
JP4657178A 1978-04-21 1978-04-21 Pattern generation circuit Pending JPS54139427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4657178A JPS54139427A (en) 1978-04-21 1978-04-21 Pattern generation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4657178A JPS54139427A (en) 1978-04-21 1978-04-21 Pattern generation circuit

Publications (1)

Publication Number Publication Date
JPS54139427A true JPS54139427A (en) 1979-10-29

Family

ID=12750995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4657178A Pending JPS54139427A (en) 1978-04-21 1978-04-21 Pattern generation circuit

Country Status (1)

Country Link
JP (1) JPS54139427A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5750083A (en) * 1980-09-11 1982-03-24 Canon Inc Recording device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5127031A (en) * 1974-10-18 1976-03-06 Ricoh Kk MOJIHYO JISOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5127031A (en) * 1974-10-18 1976-03-06 Ricoh Kk MOJIHYO JISOCHI

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5750083A (en) * 1980-09-11 1982-03-24 Canon Inc Recording device
JPH0551919B2 (en) * 1980-09-11 1993-08-03 Canon Kk

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