JPS54146520A - Picture tube display unit - Google Patents

Picture tube display unit

Info

Publication number
JPS54146520A
JPS54146520A JP5466278A JP5466278A JPS54146520A JP S54146520 A JPS54146520 A JP S54146520A JP 5466278 A JP5466278 A JP 5466278A JP 5466278 A JP5466278 A JP 5466278A JP S54146520 A JPS54146520 A JP S54146520A
Authority
JP
Japan
Prior art keywords
resistance
signals
output
diode
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
JP5466278A
Other languages
Japanese (ja)
Inventor
Katsumi Kishi
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 JP5466278A priority Critical patent/JPS54146520A/en
Publication of JPS54146520A publication Critical patent/JPS54146520A/en
Pending legal-status Critical Current

Links

Landscapes

  • Studio Circuits (AREA)
  • Color Television Systems (AREA)

Abstract

PURPOSE: To choose the background of the monochrome screen to the intermediate brightness between the white and black and thus to secure the time display such as AM and PM by floating one information on the white background and sinking the other information into the black background.
CONSTITUTION: If character signal (b) and AM signal (c) enter input terminal 13 and 29 during period A, the current flows to resistance 28, diode 27 and resistance 26. Thus, diode 27 is turned on, and the emitter output of transistor Tr15 emerges across resistance 26. While PM signal (d) enters input terminal 25 in period B, and thus diode 21 is turned on with the collector output of Tr15 emerging across resistance 26. And the character signals are obtained in the positive and negative directions at the output in case AM and PM are displayed respectively. These signals are added to the synchronous signals at matrix circuit 23 in order to obtain the desired video signals at output terminal 31.
COPYRIGHT: (C)1979,JPO&Japio
JP5466278A 1978-05-09 1978-05-09 Picture tube display unit Pending JPS54146520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5466278A JPS54146520A (en) 1978-05-09 1978-05-09 Picture tube display unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5466278A JPS54146520A (en) 1978-05-09 1978-05-09 Picture tube display unit

Publications (1)

Publication Number Publication Date
JPS54146520A true JPS54146520A (en) 1979-11-15

Family

ID=12976990

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5466278A Pending JPS54146520A (en) 1978-05-09 1978-05-09 Picture tube display unit

Country Status (1)

Country Link
JP (1) JPS54146520A (en)

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