JPS54139427A - Pattern generation circuit - Google Patents
Pattern generation circuitInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5750083A (en) * | 1980-09-11 | 1982-03-24 | Canon Inc | Recording device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5127031A (en) * | 1974-10-18 | 1976-03-06 | Ricoh Kk | MOJIHYO JISOCHI |
-
1978
- 1978-04-21 JP JP4657178A patent/JPS54139427A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5127031A (en) * | 1974-10-18 | 1976-03-06 | Ricoh Kk | MOJIHYO JISOCHI |
Cited By (2)
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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