JPS6444485A - Display device - Google Patents

Display device

Info

Publication number
JPS6444485A
JPS6444485A JP62201113A JP20111387A JPS6444485A JP S6444485 A JPS6444485 A JP S6444485A JP 62201113 A JP62201113 A JP 62201113A JP 20111387 A JP20111387 A JP 20111387A JP S6444485 A JPS6444485 A JP S6444485A
Authority
JP
Japan
Prior art keywords
luminance
tube
display tube
control part
control
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
JP62201113A
Other languages
Japanese (ja)
Inventor
Kyoichi Okumura
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
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 filed Critical NEC Corp
Priority to JP62201113A priority Critical patent/JPS6444485A/en
Publication of JPS6444485A publication Critical patent/JPS6444485A/en
Pending legal-status Critical Current

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  • Controls And Circuits For Display Device (AREA)

Abstract

PURPOSE: To extend the service life of a display tube by providing the display device with a luminance control part for optionally controlling the luminance of a screen and a luminance setting part for setting up the luminance to specific intensity and changing the luminance of the display tube in a power supply ON state at the time of using it and at the time of stopping its use. CONSTITUTION: The display tube 4 displays characters, graphics, etc., based upon an instruction from a control part 2 and its luminance is properly controlled by the luminance control part 3 by the operation of a normal control 5. When the luminance setting part 1 is operated, a switch is turned on and a signal is outputted to the controlling part 3. The controlling part 3 generates a command for displaying a picture by previously set luminance different from the luminance controlled by the control 5 and the control part 2 receiving the command reduces the luminance of the tube 4. When the switch is fixed on an operator's chair or the like, the luminance of the display tube 4 is increased only when the operator exists, so that the service life of the tube 4 can be extended.
JP62201113A 1987-08-12 1987-08-12 Display device Pending JPS6444485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62201113A JPS6444485A (en) 1987-08-12 1987-08-12 Display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62201113A JPS6444485A (en) 1987-08-12 1987-08-12 Display device

Publications (1)

Publication Number Publication Date
JPS6444485A true JPS6444485A (en) 1989-02-16

Family

ID=16435617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62201113A Pending JPS6444485A (en) 1987-08-12 1987-08-12 Display device

Country Status (1)

Country Link
JP (1) JPS6444485A (en)

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