CN1466120A - Power source managemnt system for LCD - Google Patents
Power source managemnt system for LCD Download PDFInfo
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- CN1466120A CN1466120A CNA021401357A CN02140135A CN1466120A CN 1466120 A CN1466120 A CN 1466120A CN A021401357 A CNA021401357 A CN A021401357A CN 02140135 A CN02140135 A CN 02140135A CN 1466120 A CN1466120 A CN 1466120A
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- power
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- supply
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Abstract
The invention is power managing system for a power device of LCD monitor, it uses electricity input switch and examining device to make the poser device enter power saving mode, and cuts off the power of LCD montior power device.
Description
Technical field
The present invention is a kind of power-supply management system, is particularly to a kind of power-supply management system of LCD supply unit, make the LCD supply unit enter battery saving mode after, cut off the power supply of LCD supply unit, to reach the effect of power saving.
Background technology
In order to reach the purpose of economize on electricity, there are many hardware or software all to have the function of power management in the computer realm.Generally speaking, computer system all is to input to supply unit via external power source, and the process supply unit is to supply with the required power supply of computer system again.The peripheral unit of computer system partly, CD-ROM drive for example, liquid crystal indicator or the like is because the power consumption of itself is little, so the power consumption of itself can be provided by the supply unit of computer system.And the power management of computer system can be distinguished into two kinds, a kind of is to utilize operating system or power management software, detect the user mode of present peripheral unit, for example, the action that does not have discs or user the CD work not to be read for a long time in the CD-ROM drive, then present CD-ROM drive is switched to battery saving mode by normal mode, and the method for switching is to export standby to the CD-ROM drive supply unit, and the CD-ROM drive supply unit receives that this standby then changes the voltage that battery saving mode is provided into by the voltage that normal mode is provided; Another kind is to utilize change-over switch, can place the casing or the obvious part of computer system or peripheral unit, for example the user uses after the CD-ROM drive, utilize this change-over switch to make the CD-ROM drive supply unit change the voltage that battery saving mode is provided into, reach the purpose of saving power consumption by the voltage that normal mode is provided.Fig. 1 is the calcspar of known power-supply management system, is applicable to liquid crystal indicator, provides line voltage S6 to provide liquid crystal indicator 16 required power for operation S2 by supply unit 14 again to supply unit 14 by external power source.Power for operation S2 can be distinguished into the normal electricity of normal mode and the power saving electric power of battery saving mode.The synchronizing signal S0 that supply unit 14 receiving computer systems 10 are sent, when computer system was normally used, when synchronizing signal S0 was initiate mode, supply unit 14 provided normal electricity to liquid crystal indicator 16; When computer system entered power down mode or shutdown, when synchronizing signal S0 was power save mode, supply unit 14 provided most liquid crystal indicator 16 of power saving electric power.Yet even the synchronizing signal S0 of computer system 10 output power save modes, supply unit 14 still provides power saving electric power to liquid crystal indicator 16, and this moment, liquid crystal indicator 16 still had the consumption of power, so can't reach efficient purpose of power saving.
Summary of the invention
In view of this, the power-supply management system that the purpose of this invention is to provide a kind of LCD supply unit, utilize electric power input switch device and pick-up unit, make the supply unit of liquid crystal screen enter battery saving mode after, cut off the power supply of LCD supply unit fully.
For reaching purpose of the present invention, the present invention discloses a kind of power-supply management system, be applicable in the LCD, LCD is according to the initiate mode of synchronizing signal or power save mode and the operation that enters normal mode or battery saving mode respectively, power-supply management system comprises: supply unit, the line voltage of power supply is changed, thereby offered liquid crystal indicator; And electric power input switch device, be located between supply unit and the power supply; And pick-up unit, after Preset Time turn-offs electric power input switch device, therefore make line voltage no longer import supply unit in order to become power save mode by initiate mode in synchronizing signal.
Description of drawings
For above-mentioned purpose of the present invention, feature or advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail as follows:
Fig. 1 is the calcspar of known computer power-supply management system;
Fig. 2 is the calcspar of preferred embodiment LCD screen power-supply management system;
Fig. 3 is the pick-up unit of preferred embodiment; And
Fig. 4 is the electric power input switch device of preferred embodiment.
Symbol description:
10～computer system; 14～supply unit; 16～liquid crystal indicator; 20～computer system; 22～pick-up unit; 24～electric power input switch device; 26～supply unit; 28～liquid crystal indicator; 32～diode; And 34～capacitor.
Embodiment
Fig. 2 is the calcspar for preferred embodiment LCD screen power-supply management system.The power-supply management system of preferred embodiment comprises:
Pick-up unit 22 receives synchronizing signal S0 and output switching signal S3, when synchronizing signal S0 becomes power save mode by initiate mode after Preset Time changes the switching signal S3 that is output as initiate mode originally into power save mode.Wherein synchronizing signal S0 can be provided by computer system 20 or switching device shifter (not showing).Pick-up unit 22 as shown in Figure 3, comprise diode 32 and capacitor 34, when synchronizing signal S0 was in initiate mode, diode 32 detected the crest voltage of synchronizing signal S0 and deposits capacitor 34 in, exports the switching signal S3 of high level by the driving of crest voltage; When synchronizing signal S0 became power save mode, capacitor 34 discharged, and behind Preset Time, crest voltage is kept to cut-off voltage and the switching signal S3 of output low level.Wherein, Preset Time depends on the capacitance of capacitor 34.
Electric power input switch device 24, input line voltage S6 that external power provided also provides line voltage S6 to LCD supply unit 26 according to switching signal S3.If switching signal S3 is for enabling then provide line voltage S6 to LCD supply unit 26; If switching signal is for energy-conservation then stop to provide line voltage S6 to LCD supply unit 26.Electric power input switch device 24 as shown in Figure 4, can be triac (TRIAC), be switching signal S3 when enabling, line voltage S6 inputs to electric power input switch device 24, so electric power input switch device 24 provides line voltage S6 to LCD supply unit 26; When switching signal S3 was energy-conservation, line voltage S6 can't input to electric power input switch device 24, so electric power input switch device 24 can't provide line voltage S6 to LCD supply unit 26.Because no any line voltage offers LCD supply unit 26, so LCD supply unit 26 does not consume any electric power, can reach purpose of the present invention.
In addition, computer system 20 also comprises input sync signal S0 to supply unit 26, makes LCD supply unit 26 provide liquid crystal indicator 28 required electric power according to synchronizing signal S0.When synchronizing signal S0 was initiate mode, LCD supply unit 26 provided liquid crystal indicator 28 required electric power under proper pattern; When synchronizing signal S0 was power save mode, LCD supply unit 26 provided liquid crystal indicator 28 required electric power under battery saving mode.
Though the present invention with a preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can change and improve, so protection scope of the present invention is when being as the criterion with appended claim institute restricted portion.
Claims (7)
1. a power-supply management system is applicable in a display device, the operation that described display device enters normal mode or battery saving mode respectively according to the initiate mode of a synchronous signal or power save mode, and described power-supply management system comprises:
One supply unit is changed a line voltage of a power supply, thereby is offered described display device;
One electric power input switch device, be located between described supply unit and the described power supply, when described electric power input switch device is conducting, import described line voltage to described supply unit, when described electric power input switch device was shutoff, described line voltage was no longer imported described supply unit; And
One pick-up unit, described synchronizing signal becomes power save mode by initiate mode after a Preset Time turn-offs described electric power input switch device in order to detect.
2. power-supply management system as claimed in claim 1, wherein, described electric power input switch device is a triac (TRIAC).
3. power-supply management system as claimed in claim 1, wherein, described pick-up unit comprises a diode and a capacitor; When described synchronizing signal was in initiate mode, described diode detection went out the crest voltage of described synchronizing signal and deposits described capacitor in, and the driving by described crest voltage makes the conducting of described electric power input switch device; When described synchronizing signal became power save mode, described capacitor discharged, and behind described Preset Time, described crest voltage is kept to a cut-off voltage and impels described electric power input switch device to turn-off.
4. power-supply management system as claimed in claim 3, wherein, described Preset Time depends on the capacitance of this capacitor.
5. power-supply management system as claimed in claim 1, wherein, described pick-up unit also comprises the described synchronizing signal of input and exports a switching signal to described supply unit, makes described supply unit provide described display device to enter normal mode or the required electric power of battery saving mode respectively.
6. a power-supply management system that is applicable to display device after this display device can receive a received image signal, is converted to the image demonstration, and this power-supply management system comprises:
One supply unit is changed a line voltage of a power supply, thereby is offered this display device;
One triac (TRIAC) is located between this supply unit and this power supply;
One diode; And
One capacitor;
Wherein an end of this diode is coupled to this received image signal, the other end of this diode connects an end of this capacitor and a control end of this triac (TRIAC), this capacitor other end ground connection, the crest voltage that goes out this received image signal when this diode detection deposits in this capacitor, then make this triac conduction by the voltage that is added in this capacitor, then this supply unit provides voltage to this display device, when this diode no longer import this received image signal then this capacitor discharge, behind a Preset Time, the voltage that is added in this capacitor can make this triac open circuit, and then this supply unit no longer provides voltage to this display device.
7. power-supply management system as claimed in claim 6, wherein, described Preset Time depends on the capacitance of this capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021401357A CN1466120A (en) | 2002-07-02 | 2002-07-02 | Power source managemnt system for LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021401357A CN1466120A (en) | 2002-07-02 | 2002-07-02 | Power source managemnt system for LCD |
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| Publication Number | Publication Date |
|---|---|
| CN1466120A true CN1466120A (en) | 2004-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021401357A Pending CN1466120A (en) | 2002-07-02 | 2002-07-02 | Power source managemnt system for LCD |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354919C (en) * | 2005-08-24 | 2007-12-12 | 友达光电股份有限公司 | Display device and data driving circuit |
| CN101770765A (en) * | 2008-12-30 | 2010-07-07 | 环达电脑(上海)有限公司 | Automatic power-saving module and automatic power-saving method |
| CN101253462B (en) * | 2005-08-31 | 2010-09-29 | Lg电子株式会社 | Method and apparatus for supplying power, and display device |
| CN101553861B (en) * | 2006-04-11 | 2012-01-11 | Lg电子株式会社 | Display system and power control method thereof |
| CN102708784A (en) * | 2012-07-02 | 2012-10-03 | 深圳市开立科技有限公司 | Electrification management system and method of display screen |
| CN102714024A (en) * | 2010-01-20 | 2012-10-03 | 株式会社半导体能源研究所 | Display device |
| CN104052890A (en) * | 2013-03-12 | 2014-09-17 | 佳能株式会社 | Electronic Apparatus That Measures Power During Power Saving State, And Method Of Controlling The Same |
| CN104090645A (en) * | 2013-06-17 | 2014-10-08 | 苏州天趣信息科技有限公司 | Power supply control system of display and control method thereof |
-
2002
- 2002-07-02 CN CNA021401357A patent/CN1466120A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354919C (en) * | 2005-08-24 | 2007-12-12 | 友达光电股份有限公司 | Display device and data driving circuit |
| CN101253462B (en) * | 2005-08-31 | 2010-09-29 | Lg电子株式会社 | Method and apparatus for supplying power, and display device |
| CN101553861B (en) * | 2006-04-11 | 2012-01-11 | Lg电子株式会社 | Display system and power control method thereof |
| CN101770765A (en) * | 2008-12-30 | 2010-07-07 | 环达电脑(上海)有限公司 | Automatic power-saving module and automatic power-saving method |
| US10089946B2 (en) | 2010-01-20 | 2018-10-02 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
| CN102714024A (en) * | 2010-01-20 | 2012-10-03 | 株式会社半导体能源研究所 | Display device |
| CN102714024B (en) * | 2010-01-20 | 2015-09-02 | 株式会社半导体能源研究所 | Display device |
| US10580373B2 (en) | 2010-01-20 | 2020-03-03 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
| US11081072B2 (en) | 2010-01-20 | 2021-08-03 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
| US11462186B2 (en) | 2010-01-20 | 2022-10-04 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
| US11790866B1 (en) | 2010-01-20 | 2023-10-17 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
| CN102708784A (en) * | 2012-07-02 | 2012-10-03 | 深圳市开立科技有限公司 | Electrification management system and method of display screen |
| CN104052890A (en) * | 2013-03-12 | 2014-09-17 | 佳能株式会社 | Electronic Apparatus That Measures Power During Power Saving State, And Method Of Controlling The Same |
| CN104090645A (en) * | 2013-06-17 | 2014-10-08 | 苏州天趣信息科技有限公司 | Power supply control system of display and control method thereof |
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