JPS5556241A - Crt display unit - Google Patents

Crt display unit

Info

Publication number
JPS5556241A
JPS5556241A JP12782978A JP12782978A JPS5556241A JP S5556241 A JPS5556241 A JP S5556241A JP 12782978 A JP12782978 A JP 12782978A JP 12782978 A JP12782978 A JP 12782978A JP S5556241 A JPS5556241 A JP S5556241A
Authority
JP
Japan
Prior art keywords
pattern data
display pattern
brightness inversion
outputted
indication signal
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
JP12782978A
Other languages
Japanese (ja)
Inventor
Hisakazu Furuichi
Kunio Matsuda
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12782978A priority Critical patent/JPS5556241A/en
Publication of JPS5556241A publication Critical patent/JPS5556241A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To make desired information conspicuous to an operator among many pieces of information on display, by using negative characters for it. CONSTITUTION:A brightness inversion assignment code, if residing refresh memory 1, is detected by decoder 2 to set FF3. As a result, a brightness inversion indication signal changes from a low level to a high level and is supplied to exclusive- OR gate 5. Namely, when the brightness inversion indication signal is ''0'', display pattern data is outputted as it is, but when it is ''1'', the display pattern data changes from ''0'' to ''1'' or reversely and is outputted. The display pattern data of ''1'' makes a bright point on a screen, so that a point which is normally a bright point comes off while its back consists of bright points. In this way, negative characters are displayed.
JP12782978A 1978-10-19 1978-10-19 Crt display unit Pending JPS5556241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12782978A JPS5556241A (en) 1978-10-19 1978-10-19 Crt display unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12782978A JPS5556241A (en) 1978-10-19 1978-10-19 Crt display unit

Publications (1)

Publication Number Publication Date
JPS5556241A true JPS5556241A (en) 1980-04-24

Family

ID=14969686

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12782978A Pending JPS5556241A (en) 1978-10-19 1978-10-19 Crt display unit

Country Status (1)

Country Link
JP (1) JPS5556241A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03222077A (en) * 1990-01-26 1991-10-01 Fujitsu Ltd Contour paint-out circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03222077A (en) * 1990-01-26 1991-10-01 Fujitsu Ltd Contour paint-out circuit

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