JPS6433586A - Crt display - Google Patents
Crt displayInfo
- Publication number
- JPS6433586A JPS6433586A JP62190853A JP19085387A JPS6433586A JP S6433586 A JPS6433586 A JP S6433586A JP 62190853 A JP62190853 A JP 62190853A JP 19085387 A JP19085387 A JP 19085387A JP S6433586 A JPS6433586 A JP S6433586A
- Authority
- JP
- Japan
- Prior art keywords
- input
- signal
- counter
- power switch
- reset
- 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
Landscapes
- Controls And Circuits For Display Device (AREA)
- Power Sources (AREA)
Abstract
PURPOSE: To enable a user to use a CRT display device without paying his attention to power switch by providing a power switch which automatically turns on/off a power supply circuit in accordance with the presence/absence of input of a video signal. CONSTITUTION: An amplification circuit 21 amplifies the video input signal to the input level of a comparator 22. At this time, only a horizontal synchronizing signal included in the video input signal is detected by the comparator 22. The output of the comparator 22 is connected to the reset input of a counter 23, and a pulse from an oscillation circuit 24 is connected to the clock input of the counter 23. Consequently, the counter 23 continues to count the pulse from the oscillation circuit 24 and is returned to the initial value at the time of input of a reset signal on the way but outputs an overflow signal after a certain time without input of the reset signal. The overflow signal of the counter 23 is kept unless it is reset, and this signal is inputted to the power switch to open the power switch. The power source is turned off in the case of the absence of video input but is turned on in the case of the absence of video input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62190853A JPS6433586A (en) | 1987-07-29 | 1987-07-29 | Crt display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62190853A JPS6433586A (en) | 1987-07-29 | 1987-07-29 | Crt display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6433586A true JPS6433586A (en) | 1989-02-03 |
Family
ID=16264863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62190853A Pending JPS6433586A (en) | 1987-07-29 | 1987-07-29 | Crt display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6433586A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05127638A (en) * | 1991-11-05 | 1993-05-25 | Sharp Corp | Control signal transmitting method of display device |
| JPH06250765A (en) * | 1993-02-22 | 1994-09-09 | Tandberg Data As | Method and equipment for automatically reducing power consumption of monitor |
| US6504534B1 (en) | 1992-09-29 | 2003-01-07 | Nanao Corporation | CRT display unit and power supply control method therefor |
| JP2012064193A (en) * | 2010-03-26 | 2012-03-29 | Fujitsu Component Ltd | Electronic device |
-
1987
- 1987-07-29 JP JP62190853A patent/JPS6433586A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05127638A (en) * | 1991-11-05 | 1993-05-25 | Sharp Corp | Control signal transmitting method of display device |
| US6504534B1 (en) | 1992-09-29 | 2003-01-07 | Nanao Corporation | CRT display unit and power supply control method therefor |
| JPH06250765A (en) * | 1993-02-22 | 1994-09-09 | Tandberg Data As | Method and equipment for automatically reducing power consumption of monitor |
| JP2012064193A (en) * | 2010-03-26 | 2012-03-29 | Fujitsu Component Ltd | Electronic device |
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