CN1263293A - Power supply module with electricity-saving control device - Google Patents
Power supply module with electricity-saving control device Download PDFInfo
- Publication number
- CN1263293A CN1263293A CN99102194A CN99102194A CN1263293A CN 1263293 A CN1263293 A CN 1263293A CN 99102194 A CN99102194 A CN 99102194A CN 99102194 A CN99102194 A CN 99102194A CN 1263293 A CN1263293 A CN 1263293A
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- CN
- China
- Prior art keywords
- power supply
- power
- supply module
- signal
- control
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- 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.)
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/3296—Power saving characterised by the action undertaken by lowering the supply or operating voltage
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
- G06F1/3215—Monitoring of peripheral devices
- G06F1/3218—Monitoring of peripheral devices of display devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The electricity-saving controllable power supply component is characterized by utilizing an external signal change to control said power supply and make it come into electricity-saving condition, and including a power supply component with a voltage-regulating transformer to control said power supply possess stable output, and a control circuit which is electrically connected with said power supply component and used for controlling the voltage-regulating transformer of said power supply component by means of the described signal to make the voltage-regulating transformer control the power supply component to make it come into electricity-saving condition.
Description
The present invention relates to a kind of power supply module of tool power-saving control, relate in particular to the power supply module that is used for monitor tool power-saving control.
Monitor (monitor) can both meet the energy power saving regulations of EPA, VESA, NUTEK at present, minimum specification also needs less than below 5 watts (w), the regulations that also have E2000, TC099 in the future, its minimum power saving wattage need be below 3 watts, if control with line design now, then need to spend expensive design cost, just can meet the demand of E2000 and TC099.
Fig. 1 is the existing circuit block diagram that carries out the power supply device of power-saving control, and it mainly comprises a transformer Tr, a Wave-wide regulation controlled electric device PWM, an accessory power supply Aux.Power, an electronic switch SW and a microcontroller MCU.When the monitor normal operation, the voltage Vo that electronic switch SW connects transformer Tr output uses to monitor, this voltage comprises three voltages of 80 volts, 15 volts and 6.3 volts, microcontroller also can receive the signal S that produces from its inside, for example the horizontal signal Hs of screen or vertical signal Vs simultaneously.When monitor enters power down mode, horizontal signal or vertical signal can disappear, and microprocessor can be controlled electronic switch according to this, makes it to cut off the power supply Vo of output.
The existing power-saving control circuit that carries out is except the electronic switch SW that is subjected to the control of two groups of control power supplys at transformer Tr secondary power place, also need provide one group of accessory power supply Aux.Power to come operation circuit, as the power supply of microcontroller MCU, control the operating state of primary power.Though it can arrive the purpose of power-saving control, the design cost that is spent improves relatively, and makes the complex circuitization of design.
In other words, under existing power down mode, connect electronic switch SW in the time of must occurring once again because of signal S owing to microprocessor,, therefore just have the consumption of electric power so must additionally provide an accessory power supply Aux.Power to come for its basic running.In addition, owing to just cut off the power supply Vo of electronic switch SW output,, but can't make each element of power supply device inside be in the state of power saving so can only make other circuit of monitor inside not consume electric power.To power supply device is that load (loading) descends, and in fact, transformer Tr and Wave-wide regulation controlled electric device elements such as (PWM) still can pass to electric current every now and then, consume electric power constantly.
In order to make above-mentioned power down mode power consumption less than 3 watts requirement, the expensive design cost of obviously essential cost is to reduce the power consumption of inner each element of power supply device.And low-price computers in vogue now, computer design is low-cost day by day, and existing way is difficult to popularly, obviously is eliminated.
The object of the present invention is to provide a kind of power supply module of tool power-saving control of with low cost, the regulations that meet E2000 and TC099.
The object of the present invention is achieved like this, a kind of power supply module of tool power-saving control, it is by an external signal and control it by the variation of signal and enter power down mode, it is characterized in that it comprises: a power supply module, and it has one and is stablized the modulator of output in order to control this power supply module; And, a control circuit, it is electrically connected to this power supply module, and controls the modulator of this power supply module by accepting described signal, makes this modulator control this power supply module and enters this power down mode.
Wherein, described signal is the horizontal signal or the vertical signal of a screen.
Described power supply module also comprises: a transformer, and it is electrically connected to described modulator, and stablizes out-put supply by described modulator control, and this power supply of output is also feedback to the usefulness of described modulator for control; One on-off circuit, it is electrically connected to this transformer, in order to control the output of this power supply; And, a microcontroller, it is electrically connected to this on-off circuit, and because of the variation of this signal, and controls the switch of this on-off circuit.
Described on-off circuit is a transistor circuit.
Described modulator is a Wave-wide regulation controlled electric device.
Described control circuit comprises: one signal-voltage control circuit, because of the variation of described signal is converted to one first voltage signal; And, a power saving delay control circuit, it is electrically connected to this modulator and this signal-voltage control circuit, and controls described modulator because of the variation of described first voltage signal produces one second voltage signal.
Described control circuit also comprises a pilot lamp control circuit, changes the color of demonstration because of the variation of a feedback voltage.
The color of described demonstration determines it by the light emitting diode of two different colours of this pilot lamp control circuit inside.
Also be electrically connected an optically-coupled switch between described signal-voltage control circuit and this power saving delay control circuit, so that the conversion by photoelectricity is sent to described power saving delay control circuit with described first voltage signal.
Described power saving delay control circuit also starts because of the first time of this power supply module, makes this power supply module action normal.
Described power saving delay control circuit is when described power supply module enters power down mode, and delay a period of time is closed this power supply module again.
When described signal-voltage control circuit enters power down mode at described power supply module,, described power saving delay control circuit is decommissioned because of described signal produces described first voltage signal.
When described power saving delay control circuit decommissioned, described power supply module was an opening.
Described power supply module is a power supply device.
Owing to adopted above-mentioned technical solution, the present invention need not resembled existingly provides power supply to microcontroller by an accessory power supply, thereby has reduced cost, and reaches the electricity-saving function of power supply device,
The present invention is described in detail below in conjunction with embodiments of the invention and accompanying drawing.
Fig. 1 is the circuit block diagram of existing power supply device;
Fig. 2 is the circuit block diagram of the power supply module of tool power-saving control of the present invention;
Fig. 3 is the circuit diagram of the power supply module of tool power-saving control of the present invention;
Fig. 4 is the signal-voltage control circuit figure among the present invention;
Fig. 5 is the power saving delay control circuit figure among the present invention;
Fig. 6 is the another kind of power saving delay control circuit figure among the present invention;
Fig. 7 is another the power saving delay control circuit figure among the present invention;
Fig. 8 is the pilot lamp control circuit figure among the present invention.
See also Fig. 2, the power supply module of tool power-saving control of the present invention, mainly the disappearance because of signal S (the horizontal signal Hs of screen or vertical signal Vs) enters a power down mode, and when detecting signal S and occur once again, the switchback duty.Power supply device 21 mainly comprises transformer Tr, Wave-wide regulation controlled electric device PWM, microcontroller MCU and electronic switch SW.Wave-wide regulation controlled electric device PWM makes it the power supply Vo of stable output in order to control this power supply module.22 of control circuits are connected to this power supply device 21, and because of the appearance of signal S or disappear and control the Wave-wide regulation controlled electric device PWM of power supply device 21, make Wave-wide regulation controlled electric device PWM control power supply device 21 enter power down mode or duty.
Be that with existing difference the accessory power supply Aux.Power that the present invention need not to provide extra directly comes the energized charger by control circuit by detecting screen level signal or vertical signal to microcontroller under power down mode.So on cost, can reduce the expense of accessory power supply.
In addition, under power down mode, control circuit is directly controlled the Wave-wide regulation controlled electric device, make voltage no longer include output, that is Wave-wide regulation controlled electric device and transformer are to maintain the state that does not operate at this moment, therefore can save more electric power, and then reach the regulation that is no more than 3w among up-to-date energy regulations E2000 and the TC099.
Certainly, the main control circuit that still is can be reached with lower-cost circuit, and this makes the cost of whole power supply module greatly reduce again.Then details are as follows about the practice of control circuit and principle:
Fig. 3 is preferred embodiment of the present invention.Wherein transformer Tr is subjected to the control of Wave-wide regulation controlled electric device and the voltage of 80 volts, 15 volts of stable outputs and 6.3 volts.Diode D201, D202 and D203 and capacitor C 201, C202 and C203 are used for rectification and filtering.Transistor Q201 and Q202 then are subjected to the control of microcontroller MCU (IC201), when horizontal signal Hs or vertical signal Vs enter power down mode because of disappearance, then transistor Q201 and Q202 can cut off the voltage of output, make other circuit of monitor enter power down mode.Remove this, the present invention also passes through the running of signal-voltage control circuit 33 and power saving delay control circuit 32, the result of detection level signal and vertical signal is passed to power supply device inside, Wave-wide regulation controlled electric device PWM (IC101) and transformer Tr are decommissioned, further save the expense of electric power.
In addition, optically coupled integrated circuit IC102 is in working order the time, then feedbacks the voltage of output to give Wave-wide regulation controlled electric device PWM, to keep stable output voltage.
Wherein, control circuit mainly comprises signal-voltage control circuit 33 and power saving delay line 32, removes this and also comprises pilot lamp control circuit 31.Signal-voltage control circuit 33 is converted to the first voltage signal V1 (see figure 4) with horizontal signal Hs and the vertical signal Vs because of screen.Power saving delay control circuit 32 is connected to this modulator PWM and signal-voltage control circuit 33, and because of the first voltage signal V1 to produce one second voltage signal V2 (see figure 5) control wave width modulation device PWM (IC101).In addition, pilot lamp control circuit 31 because of feedback synchronizing signal+FB and-the having or not of FB, and change the color of demonstration.
That is, signal-Control of Voltage circuit 33 major functions are, when power supply during at power down mode, one detects horizontal signal Hs or vertical signal Vs when any signal input is arranged, impel optically coupled integrated circuit IC104 conducting, allow power saving delay control circuit 32 fail then, and then power supply device is opened.And power saving delay control circuit fundamental purpose have two: one, when power supply device starts for the first time, make it not have misoperation; Two, when just entering the power down mode state, postpone a period of time earlier, restart power supply device, in order to avoid cause the misoperation of internal circuit.In addition, the pilot lamp control circuit then by feedback synchronizing signal+FB and-FB controls the change color of light emitting diode, generally be green in working order, then is orange at power down mode.
Be described further with next each frame at control circuit:
Fig. 4 is signal-voltage delay circuit of the present invention, its circuit have four signals-voltage controling input end 6.3V, Hs, Vs and USB upstream it+5V.Under normal operation, four signal-voltages all exist, and make capacitor C 204 charging when a certain voltage quasi position, allow optically coupled integrated circuit IC104 conducting.Light condenses integrated circuit (IC) 104 when conducting state, and the power saving delay line will be cut off, and makes whole power supply device normal operation.
When at power down mode, Hs, Vs and USB upstream are low-potential state, after this moment, microcontroller was judged, can remove to cut off transistor Q203 again, make voltage stabilizing diode ZD201 close, this moment, the pressure position of the first voltage V1 was an electronegative potential, and then optically coupled integrated circuit IC104 is cut off, the power saving delay control circuit just is unlocked, thereby closes the Wave-wide regulation controlled electric device PWM (IC101) of primary power control usefulness.After Wave-wide regulation controlled electric device PWM (IC101) was closed, all electric power just were cut off, and reached the purpose of power saving less than 3w.
Fig. 5 is power saving delay control circuit figure.When the first voltage V1 was electronegative potential, light lotus root intersection became IC circuit 104 to cut off.At this moment, capacitor C 102 begins charging, and when reaching 3.6V, transistor Q102 just is switched on, and the output that the error of Wave-wide regulation controlled electric device PWM (IC101) pin 1 inside is amplified is just received electronegative potential by transistor Q102.When the pin 1 of Wave-wide regulation controlled electric device was pulled to electronegative potential, its action just was stopped, and makes transformer Tr do not controlled by it, thereby whole power supply device enters cut-off state, reached the purpose of power-saving control.
If power supply device is start for the first time, because capacitor C 102 instantaneous short-circuits do not have charging voltage, so voltage stabilizing diode ZD101 and transistor Q102 just can not be switched on, the Wave-wide regulation controlled electric device just can start by normal boot-strap.
Fig. 6 is another kind of power saving delay control circuit figure.Alternative Wave-wide regulation controlled electric device integrated circuit combines field-effect transistor Q101, so just needn't additionally connect a field-effect transistor again in wiring, gets final product but directly output to transformer Tr.In addition, pin 4 is input ends that voltage stabilizing is feedback, and optically coupled integrated circuit IC102 is a voltage stabilizing back coupling integrated circuit.
Fig. 7 is again another kind of power saving delay control circuit.The control of identical circuit also can be used on the Wave-wide regulation controlled electric device integrated circuit of the same size that is numbered UC3842 or different label, wherein pin connect 1 and pin 2 be connected with province electric delay operation circuit.
Fig. 8 is the pilot lamp control circuit.When operate as normal, feedback voltage+FB utilizes coupling scheme to sense a pulse from the monitor horizontal alignment, is rectified into the accurate position of direct current Vc through diode D104 and capacitor C 103.After the accurate position of direct current Vc sets up, transistor Q103 conducting, voltage Vb is a low-voltage.When voltage Vb was electronegative potential, constant-current circuit was closed, and no current flows through, so the orange lamp of light emitting diode does not work, and diode D103 opens at this moment, and the green light of light emitting diode is lighted.Wherein hand switch SW101 is the power switch of monitor, 2A, is central point on 2nd, switches to 1A, 1B or 3A, 3B.
When entering power down mode, tieback signal+FB no signal, then voltage Vc is an electronegative potential, and transistor Q103 closes, and the constant-current circuit operate as normal provides electric current to flow through the orange luminescence diode, makes it show orange fragrant plant lamp.
By above-mentioned diagram and the explanation as can be known, the present invention is in the low-cost design mode, reach the electricity-saving function of power supply device, the input/output terminal that it is amplified by the error of control wave width modulation (PWM) integrated circuit, make the Wave-wide regulation controlled electric integrated circuit open or close, and need not resemble existingly as to provide power supply to microcontroller by an accessory power supply in addition, and removing the state of control wave width modulation integrated circuit again, design cost is higher.
Claims (15)
1. the power supply module of a tool power-saving control, it is by an external signal and control it by the variation of signal and enter power down mode, it is characterized in that it comprises:
One power supply module, it have one in order to control this power supply module stablized output modulator; And
One control circuit, it is electrically connected to this power supply module, and controls the modulator of this power supply module by accepting described signal, makes this modulator control this power supply module and enters this power down mode.
2. the power supply module of tool power-saving control as claimed in claim 1 is characterized in that, described signal is a screen level signal.
3. the power supply module of tool power-saving control as claimed in claim 1 is characterized in that, described signal is a screen vertical signal.
4. the power supply module of tool power-saving control as claimed in claim 1 is characterized in that, described power supply module also comprises:
One transformer, it is electrically connected to described modulator, and stablizes out-put supply by described modulator control, and this power supply of output is also feedback to the usefulness of described modulator for control;
One on-off circuit, it is electrically connected to this transformer, in order to control the output of this power supply; And
One microcontroller, it is electrically connected to this on-off circuit, and because of the variation of this signal, and controls the switch of this on-off circuit.
5. the power supply module of tool power-saving control as claimed in claim 4 is characterized in that, described on-off circuit is a transistor circuit.
6. the power supply module of tool power-saving control as claimed in claim 1 is characterized in that, described modulator is a Wave-wide regulation controlled electric device.
7. the power supply module of tool power-saving control as claimed in claim 1 is characterized in that, described control circuit comprises:
One signal-voltage control circuit is because of the variation of described signal is converted to one first voltage signal; And
One power saving delay control circuit, it is electrically connected to this modulator and this signal-voltage control circuit, and controls described modulator because of the variation of described first voltage signal produces one second voltage signal.
8. the power supply module of tool power-saving control as claimed in claim 7 is characterized in that, described control circuit also comprises a pilot lamp control circuit, changes the color of demonstration because of the variation of a feedback voltage.
9. the power supply module of tool power-saving control as claimed in claim 8 is characterized in that, the color of described demonstration determines it by the light emitting diode of two different colours of this pilot lamp control circuit inside.
10. the power supply module of tool power-saving control as claimed in claim 7, it is characterized in that, also be electrically connected an optically-coupled switch between described signal-voltage control circuit and this power saving delay control circuit, so that by the conversion of photoelectricity, described first voltage signal is sent to described power saving delay control circuit.
11. the power supply module of tool power-saving control as claimed in claim 7 is characterized in that, described power saving delay control circuit also starts because of the first time of this power supply module, makes this power supply module action normal.
12. the power supply module of tool power-saving control as claimed in claim 7 is characterized in that, described power saving delay control circuit is when described power supply module enters power down mode, and delay a period of time is closed this power supply module again.
13. the power supply module of tool power-saving control as claimed in claim 7, it is characterized in that, when described signal-voltage control circuit enters power down mode at described power supply module,, described power saving delay control circuit is decommissioned because of described signal produces described first voltage signal.
14. the power supply module of tool power-saving control as claimed in claim 13 is characterized in that, when described power saving delay control circuit decommissioned, described power supply module was an opening.
15. the power supply module of tool power-saving control as claimed in claim 14 is characterized in that, described power supply module is a power supply device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99102194A CN1263293A (en) | 1999-02-09 | 1999-02-09 | Power supply module with electricity-saving control device |
| GB9920533A GB2346787A (en) | 1999-02-09 | 1999-09-01 | Power supply module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99102194A CN1263293A (en) | 1999-02-09 | 1999-02-09 | Power supply module with electricity-saving control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1263293A true CN1263293A (en) | 2000-08-16 |
Family
ID=5270770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99102194A Pending CN1263293A (en) | 1999-02-09 | 1999-02-09 | Power supply module with electricity-saving control device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1263293A (en) |
| GB (1) | GB2346787A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359432C (en) * | 2004-07-23 | 2008-01-02 | 宏碁股份有限公司 | Power supply monitoring method |
| CN101727161B (en) * | 2008-10-16 | 2011-05-11 | 宏碁股份有限公司 | Electronic device, power supply detection system and method |
| CN102054462B (en) * | 2009-11-05 | 2013-08-14 | 晨星软件研发(深圳)有限公司 | Low power consumption display control method and relevant display controller |
| CN106648159A (en) * | 2015-10-28 | 2017-05-10 | 翰硕电子股份有限公司 | Capacitance pen with electricity-saving device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW521479B (en) * | 2001-06-08 | 2003-02-21 | Primax Electronics Ltd | Control circuit for switching type power converter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2313027B (en) * | 1996-05-08 | 2000-03-22 | Icl Systems Ab | Video display unit |
| KR100224085B1 (en) * | 1996-08-14 | 1999-10-15 | 윤종용 | Power saving display device and method for controlling power thereof |
-
1999
- 1999-02-09 CN CN99102194A patent/CN1263293A/en active Pending
- 1999-09-01 GB GB9920533A patent/GB2346787A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100359432C (en) * | 2004-07-23 | 2008-01-02 | 宏碁股份有限公司 | Power supply monitoring method |
| CN101727161B (en) * | 2008-10-16 | 2011-05-11 | 宏碁股份有限公司 | Electronic device, power supply detection system and method |
| CN102054462B (en) * | 2009-11-05 | 2013-08-14 | 晨星软件研发(深圳)有限公司 | Low power consumption display control method and relevant display controller |
| CN106648159A (en) * | 2015-10-28 | 2017-05-10 | 翰硕电子股份有限公司 | Capacitance pen with electricity-saving device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9920533D0 (en) | 1999-11-03 |
| GB2346787A (en) | 2000-08-16 |
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