JPS5452928A - Crt display unit - Google Patents

Crt display unit

Info

Publication number
JPS5452928A
JPS5452928A JP11937477A JP11937477A JPS5452928A JP S5452928 A JPS5452928 A JP S5452928A JP 11937477 A JP11937477 A JP 11937477A JP 11937477 A JP11937477 A JP 11937477A JP S5452928 A JPS5452928 A JP S5452928A
Authority
JP
Japan
Prior art keywords
output
counter
roll
line
circuit
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
JP11937477A
Other languages
Japanese (ja)
Inventor
Akira Shiga
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11937477A priority Critical patent/JPS5452928A/en
Publication of JPS5452928A publication Critical patent/JPS5452928A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To secure a simple line shift of the screen for the display unit which rolls up or down the data to be displayed, by selecting optionally the output of the line counter based on the external information and then applying the output as the vertical synchronous signal.
CONSTITUTION: In the CRT display control unit which contains memory unint 9 to store the CRT display information of one or more than one screen which is given from outside, line counter 5 counting line number 9 corresponding to display line number N and the vertical flyback time is installed along with display character number counter 4. In addition, the following units are added: line shift indication information register 7 which stores the roll-up or roll-down information given from outside; comparison coincidence circuit 10 which compares the output between register 7 and counter 5; and pulse duration adjusting circuit 14 which adjusts the output time of circuit 10. When a coincidence is obtained between the contents of register 7 which is set based on the external information and the contents of counter 5, the output of circuit 14 is applied to CRT12 in the form of the vertical synchronous signal. Then the picture read out from unit 9 is displayed in the form of the roll-up or roll-down
COPYRIGHT: (C)1979,JPO&Japio
JP11937477A 1977-10-04 1977-10-04 Crt display unit Pending JPS5452928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11937477A JPS5452928A (en) 1977-10-04 1977-10-04 Crt display unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11937477A JPS5452928A (en) 1977-10-04 1977-10-04 Crt display unit

Publications (1)

Publication Number Publication Date
JPS5452928A true JPS5452928A (en) 1979-04-25

Family

ID=14759918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11937477A Pending JPS5452928A (en) 1977-10-04 1977-10-04 Crt display unit

Country Status (1)

Country Link
JP (1) JPS5452928A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050592A (en) * 1983-08-30 1985-03-20 シャープ株式会社 Driving circuit for dot matrix liquid crystal display unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050592A (en) * 1983-08-30 1985-03-20 シャープ株式会社 Driving circuit for dot matrix liquid crystal display unit

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