CN103731618B - Display device and its readiness control circuit - Google Patents
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- CN103731618B CN103731618B CN201310618726.7A CN201310618726A CN103731618B CN 103731618 B CN103731618 B CN 103731618B CN 201310618726 A CN201310618726 A CN 201310618726A CN 103731618 B CN103731618 B CN 103731618B
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- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000007600 charging Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005404 monopole Effects 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a kind of display device readiness control circuit.The display device readiness control circuit, including first line, the second circuit and pulse width modulating chip, the first line are connected to the first end of the pulse width modulating chip；Second end of the pulse width modulating chip is connected to ground wire；First switching element and commutation diode are provided with the first line；It is breaking between second circuit and the pulse width modulating chip first end when the first switching element turns off.In display device readiness control circuit in the present invention, no matter phase line and center line are just to connect or reversal connection, after civil power is cut off, first line and the second circuit disconnect the electrical connection between pulse width modulating chip first end immediately, therefore the output voltage of readiness control circuit being capable of power down immediately, intuitively impression to user is exactly that switching on and shutting down indicator lamp extinguishes rapidly, may determine that have been switched off success immediately.
Description
Technical field
The present invention relates to display technology field, more particularly to this is standby for a kind of display device readiness control circuit and application
The display device of control circuit.
Background technology
In the prior art, the attaching plug of the display device such as most domestic TVs is commonly two-pin plug, the two-phase
The phase line that plug passes through insert row and civil power（It is commonly called as live wire）And center line（It is commonly called as zero line）Connection, in addition, should connect with phase line
On the circuit connect, a single knife switch is also configured with, passes through the single knife switch, you can controls the switch of display device.
However, because most insert rows in current China do not have fool proof for two-phase socket（In order to avoid wrong plug and anti-inserted
Design）Measure, and also without any about just connecing or the mark of reversal connection on attaching plug；Thus it is very easy to cause
There is the problem of reversal connection when phase line and center line access TV.
Basic readiness control circuit is provided with display device power panel, readiness control circuit is mainly used in as display
Equipment mainboard and the power supply of switching on and shutting down indicator lamp, it includes rectifying component and pulsewidth modulation（Pulse Width
Modulation, it is abbreviated as PWM）The components such as chip.Although do not have when phase line and center line reversal connection to the normal work of display device
Any influence, but for readiness control circuit, after civil power is cut off, the reversal connection of phase line and center line will influence Opportunity awaiting control for linear electricity
The power down time of road output voltage, when readiness control circuit output voltage can not power down immediately when, then for display device master
The power supply of plate and switching on and shutting down indicator lamp also can continue a bit of time accordingly, and it is exactly that switching on and shutting down refer to intuitively to experience to user
Show that lamp extinguishes slow, can not judge whether to have been switched off success immediately；This point drives standby in full-bridge high-voltage charging
What is showed in control circuit is especially pronounced.
Therefore, one kind after civil power is cut off, can enable the technology of the output voltage power down immediately of readiness control circuit
Scheme urgently provides.
The content of the invention
For some or all of problem in background technology, the invention provides a kind of display device readiness control circuit
And the display device using the readiness control circuit, for realizing after civil power is cut off, the output voltage of readiness control circuit
Being capable of power down immediately.
Specifically, the display device readiness control circuit, including first line, the second circuit and pulsewidth modulation core
Piece, the first line are connected to the first end of the pulse width modulating chip；Second end of the pulse width modulating chip is connected to
Ground wire；
First switching element and commutation diode are provided with the first line；Turned off in the first switching element
When, it is breaking between second circuit and the pulse width modulating chip first end.
The display device, including above-mentioned readiness control circuit.
From above technical scheme, in display device readiness control circuit provided by the present invention, in first line
Be provided with first switching element and commutation diode, when first switching element turns off, first line naturally with pulsewidth modulation
It is breaking between chip first end, it is now, also breaking between the second circuit and pulse width modulating chip first end；So, no matter phase line
It is just to connect or reversal connection with center line, after civil power is cut off, first line and the second circuit disconnects immediately and pulse width modulating chip
Electrical connection between first end, thus the output voltage of readiness control circuit can power down immediately, the intuitively impression to user
It is exactly that switching on and shutting down indicator lamp extinguishes rapidly, may determine that have been switched off success immediately.
Brief description of the drawings
Fig. 1 is a kind of structural representation of display device readiness control circuit in the prior art；
Fig. 2 is a kind of structural representation of display device readiness control circuit in an embodiment of the present invention；
Fig. 3 is the structural representation of another display device readiness control circuit in the prior art；
Fig. 4 is the structural representation of another display device readiness control circuit in the prior art；
Fig. 5 is the voltage waveform of display device readiness control circuit A points when turning on single-pole single-throw switch (SPST) in Fig. 4；
Fig. 6 is the voltage waveform of display device readiness control circuit A points when turning off single-pole single-throw switch (SPST) in Fig. 4；
Fig. 7 is schematic equivalent circuit of the display device readiness control circuit when turning off single-pole single-throw switch (SPST) in Fig. 4；
Fig. 8 is a kind of structural representation of display device readiness control circuit in another embodiment of the present invention；
Fig. 9 is schematic equivalent circuit of the display device readiness control circuit when turning off double-pole single throw in Fig. 8；
Figure 10 is a kind of structural representation of display device readiness control circuit in another embodiment of the invention.
Embodiment
Embodiment one
By the long-term practice research and comparison observation of inventor, display device Opportunity awaiting control for linear of the prior art is found
Circuit, as shown in fig. 1, mainly including first line, the second circuit and pulse width modulating chip, first line and the second line
Road is connected to the first end of pulse width modulating chip, the second end ground connection of pulse width modulating chip, first line and the second circuit
On be provided with commutation diode D；But due to being wherein only provided with a single-pole single-throw switch (SPST) S0 in first line,
If phase line is just connecing with center line, i.e., phase line, which is connected to, is provided with single-pole single-throw switch (SPST) S0 first line, when cut-out hilted broadsword list
After throw switch S0, because center line is zero potential to the earth, therefore do not produce loop current, pulse width modulating chip be it is idle, this
When television set switching on and shutting down indicator lamp normally extinguish quickly.If on the contrary, phase line and center line reversal connection, i.e., center line, which is connected on, is provided with list
In monopole single throw switch S0 first line, after single-pole single-throw switch (SPST) S0 is cut off, because phase line is also connected on pulse width modulating chip,
Do not disconnect immediately, and electrical potential difference between phase line and the earth be present, loop current can be produced, therefore pulse width modulating chip can be caused
Still work a period of time, this phenomenon shows especially pronounced in the readiness control circuit that full-bridge high-voltage charging drives.
Above-mentioned analysis foundation is based on, the invention provides a kind of display device readiness control circuit, the display device
Readiness control circuit mainly includes first line, the second circuit and pulse width modulating chip, wherein, both can be that first line connects
Be connected to phase line, the second connection to center line, or or first line be connected to center line, the second connection to phase
Line；First line is connected to the first end of pulse width modulating chip；Second end of pulse width modulating chip is connected to ground wire；First
First switching element and commutation diode are provided with circuit；When first switching element turns on, pass through commutation diode
Rectified action, is DC pulse voltage by the current rectification inputted by first line, and DC pulse voltage is inputted to pulsewidth and adjusted
Coremaking piece, via the processing of pulse width modulating chip, a series of equal pulse signal of amplitudes is exported to display device, so as to control
The working condition of display device；And the present invention is with one of the main distinction of prior art, when first switching element turns off,
It is breaking not exclusively between first line and pulse width modulating chip first end, and the second circuit and pulse width modulating chip first end
Between open circuit, so, no matter phase line and center line are just to connect or reversal connection, due to after civil power is cut off, first line and the second line
Road disconnects the electrical connection between pulse width modulating chip first end immediately, therefore the output voltage of readiness control circuit can be stood
That is power down, the intuitively impression to user are exactly that switching on and shutting down indicator lamp extinguishes rapidly, may determine that have been switched off success immediately.
Embodiment two
A kind of display device readiness control circuit is provided in the present embodiment, as shown in Figure 2, the standby control of the display device
Circuit processed mainly includes first line, the second circuit and pulse width modulating chip；First line is connected to pulse width modulating chip
First end, also, the second circuit is also connected to the first end of pulse width modulating chip；Second end of pulse width modulating chip, which is connected to, to be connect
Ground wire；First switching element S1 and commutation diode D is provided with first line, also, is provided with the second circuit
Second switch element S2 and commutation diode D；Wherein, first switching element S1 is synchronous with second switch element S2 action,
That is first switching element S1 is simultaneously turned on or simultaneously turned off with second switch element S2.
When first switching element S1 and second switch element S2 are simultaneously turned on, using commutation diode D rectified action,
It is DC pulse voltage by the ac voltage rectifier inputted by first line, the second circuit, is full-wave rectification now；Direct current
Pulse voltage is inputted to pulse width modulating chip, via the processing of pulse width modulating chip, exports a series of equal pulse letter of amplitudes
Number to display device, so as to control the working condition of display device；In first switching element S1 and second switch element S2 simultaneously
It is not only breaking between first line and pulse width modulating chip first end during shut-off, and the second circuit and pulse width modulating chip the
It is breaking between one end.
Wherein, first switching element S1 and second switch element S2 can have a variety of implementations, for example, it may be throwing
Throw formula switch or simulation gate-controlled switch etc.；Preferably, in the present embodiment, in order to ensure first switching element S1
With the synchronism of second switch, first switching element S1 and second switch element S2 form double-pole single throw, double by switching
The contact condition of static contact group and movable contact spring group on monopole single throw switch, so as to control first switching element S1 and second switch simultaneously
Element S2 conducting or shut-off.
In addition, such as EMI Filtering can also be included in the display device readiness control circuit in the present embodiment
The electronic components such as device, current-limiting resistance；For example, it may be it is additionally provided with electromagnetic interference in first line and the second circuit
Wave filter, keep noise caused by the inside of display device not leak out by EMI FILTER, while prevent from showing
Noise caused by the alternating current circuit of device external enters display device；Current-limiting resistance is used to limit input to pulse width modulating chip
The amplitude of DC pulse voltage, avoid input too high to the DC pulse voltage of pulse width modulating chip；It is EMI FILTER, whole
Stream diode D current-limiting resistances and first switching element S1 and second switch element S2 position can be set according to the actual requirements
It is fixed, for example, in the present embodiment, from the first end of pulse width modulating chip, what is set gradually is：Current-limiting resistance, the pole of rectification two
Pipe D, first switching element S1 and second switch element S2 and EMI FILTER；It is of course also possible to it is that other positions are set
It is fixed, for example, from the first end of pulse width modulating chip, what is set gradually is：Commutation diode D, current-limiting resistance, electromagnetic interference filter
Ripple device and first switching element S1 and second switch element S2 etc..
In the present embodiment, illustrated so that pulse width modulating chip is FSB127H microchips as an example；FSB127H microchips have
Have the advantages that stand-by power consumption and non-loaded power consumption can be greatly reduced, therefore be highly suitable for the display that the present embodiment is provided
In device standby control circuit；If it is understood that considering for cost etc. is reduced, other types can also be used
Pulse width modulating chip, do not do particular determination herein.
In the prior art, using above-mentioned FSB127H microchips a kind of circuit as shown in Figure 3.In the circuit, first
Circuit and the second circuit are respectively used to connect with phase line with center line, and the ac commercial power voltage exported by phase line and center line is done through electromagnetism
After disturbing filter filtering, the HV ends of FSB127H microchips are connected to by commutation diode D and current-limiting resistance R respectively（It is i.e. above-mentioned
First end）, so as to be charged to the electric capacity CDD of FSB127H microchip vdd terminals, the GND ends of FSB127H microchips（I.e. above-mentioned second
End）Ground connection；In display device readiness control circuit as shown in Figure 4, FSB127H microchip internal structures are shown, work as VDD
After the capacitance voltage at end reaches cut-in voltage, the charge circuit to vdd terminal can be turned off inside FSB127H microchips, and by outside
Assists winding continues to power, and FSB127H microchips normally start.
In Fig. 4, when turning on single-pole single-throw switch (SPST) S0, theory analysis show that the voltage waveform of A points in Fig. 5 is line voltage
Voltage waveform after full-wave rectification；Now, the average voltage after rectification is：
Wherein, VACRepresent alternating voltage.
In phase line and center line reversal connection, after turning off single-pole single-throw switch (SPST) S0, center line and the connection at FSB127H microchip HV ends
Interrupt, phase line is connected to the HV ends of FSB127H microchips still through commutation diode D；Now voltage waveform such as Fig. 6 of A points
Shown in, average voltage, which is calculated, is：
Now there is voltage；And it can be filled by moving towards to form electric current as shown in Figure 7 to electric capacity CY
Electricity, electric capacity CY disconnects after charging is full of, and loop also disconnects, and now FSB127H microchips are stopped, and switching on and shutting down indicator lamp puts out
Go out；It can be seen that it is exactly the time to electric capacity CY chargings that switching on and shutting down indicator lamp, which extends the time extinguished,.
In contrast thereto, when using provided technical scheme is invented, obtained display device Opportunity awaiting control for linear
As shown in Figure 8, the equivalent circuit diagram when turning off double-pole single throw is as shown in Figure 9 for circuit, it can be clearly seen that, shut-off
Double-pole single throw（That is, simultaneously turn off first switching element S1 and second switch element S2）Afterwards, center line and FSB127H
The disconnecting at microchip HV ends, phase line and the connection at FSB127H microchip HV ends are also interrupted simultaneously, will not form loop current
Charged to electric capacity CY, i.e., FSB127H microchips can be stopped immediately, and switching on and shutting down indicator lamp can extinguish immediately.
In display device readiness control circuit provided in the present embodiment, no matter phase line and center line are just to connect or instead
Connect, after civil power is cut off, the output voltage of readiness control circuit can power down immediately；Also, cost of implementation is very low, for example,
Only need the single-pole single-throw switch (SPST) S0 in display device readiness control circuit in the prior art replacing with double-pole single throw,
With very strong practicality.
Embodiment three
A kind of display device readiness control circuit is provided in the present embodiment, the display device readiness control circuit mainly wraps
Include first line, the second circuit and pulse width modulating chip；First line is connected to the first end of pulse width modulating chip, and pulsewidth is adjusted
Second end of coremaking piece is connected to ground wire；First switching element and commutation diode are provided with first line；With reality
The main distinction for applying example one is, is open circuit all the time in the present embodiment, between the second circuit and the first end of pulse width modulating chip
's；In the present embodiment, still to be carried out exemplified by the display device readiness control circuit of FSB127H microchips is applied in embodiment two
Illustrate, i.e., as shown in Figure 10.
When turning on first switching element S1, due to only having a commutation diode D, therefore, after halfwave rectifier can only being exported
DC-pulse be depressed into the HV ends of FSB127H microchips（I.e. above-mentioned first end）, so as to FSB127H microchip vdd terminals
Electric capacity CDD charges, compared to the DC pulse voltage after the full-wave rectification in embodiment two, due to being to lose half alternating current
The rectification effect exchanged for for cost is flowed, current utilization rate is relatively low, therefore the average voltage of electric capacity CDD chargings is reduced,
Cause the startup time slack-off, but the time delayed is that millisecond rank is at all imperceptible for TV user.
After turning off first switching element S1, even if phase line and center line reversal connection, i.e., center line, which is connected on, is provided with first switching element
In S1 first line, phase line also will not form loop current by FSB127H microchips and be charged to electric capacity CY, i.e.,
FSB127H microchips can be stopped immediately, so avoid user using when occur turning off switch, switching on and shutting down indicator lamp is very
The problem of just extinguishing for a long time.
In display device readiness control circuit provided in the present embodiment, in addition to above-mentioned device and annexation, remaining
Device can be identical with relevant portion in embodiment two such as current-limiting resistance, EMI FILTER, can also individually carry out
Setting.
Compared to the display device readiness control circuit in embodiment two, the display device Opportunity awaiting control for linear in the present embodiment is electric
It is slower that although road starts the time, at all imperceptible for TV user because the time delayed is millisecond rank；
Moreover, the display device readiness control circuit in the present embodiment need not increase new electronic component, cost of implementation is relatively lower；
Further, since the volume of double-pole single throw is larger in embodiment two, therefore the display device Opportunity awaiting control for linear electricity in the present embodiment
Road can also avoid the occurrence of the problem of space hold is larger, therefore practicality is stronger.
Example IV
A kind of display device is provided in the present embodiment, the display device includes what embodiment one was provided to embodiment three
Any one readiness control circuit；In addition, the display panel and peripheral circuit in addition to readiness control circuit being connected
Etc.；The display device can be liquid crystal display, plasma display panel device, OLED（Organic Light-Emitting
Diode, Organic Light Emitting Diode）Display device etc..Due in the display device, no matter phase line and center line be just connecing or
Reversal connection, after civil power is cut off, the output voltage of readiness control circuit can power down immediately, therefore, the intuitively impression to user
It is exactly that switching on and shutting down indicator lamp extinguishes rapidly, may determine that have been switched off success immediately, so as to the demand being more close to the users.
These are only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements done etc., it should be included within the scope of protection of the invention.
Claims (10)
1. a kind of display device readiness control circuit, including first line, the second circuit and pulse width modulating chip, described first
Connection to the pulse width modulating chip first end；Second end of the pulse width modulating chip is connected to ground wire；It is special
Sign is：
First switching element and commutation diode are provided with the first line；When the first switching element turns off,
It is breaking between second circuit and the pulse width modulating chip first end.
2. readiness control circuit according to claim 1, it is characterised in that the first line is connected to phase line, and second
Connection is to center line；Or the first line is connected to center line, the second connection to phase line.
3. readiness control circuit according to claim 1, it is characterised in that the commutation diode is arranged on described first
Between switch element and the first end of pulse width modulating chip.
4. according to the readiness control circuit described in claim 1-3 any one, it is characterised in that second connection is extremely
The first end of the pulse width modulating chip, second synchronous with first switching element action is provided with second circuit
Switch element and commutation diode.
5. readiness control circuit according to claim 4, it is characterised in that the first switching element and second switch member
Part forms double-pole single throw.
6. readiness control circuit according to claim 4, it is characterised in that the first end of the pulse width modulating chip is set
Limited leakage resistance；The first line and the second circuit are connected to the of the pulse width modulating chip by the current-limiting resistance
One end.
7. according to the readiness control circuit described in claim 1-3 any one, it is characterised in that second circuit with it is described
It is breaking between the first end of pulse width modulating chip.
8. readiness control circuit according to claim 1, it is characterised in that in the first line and the second circuit also
It is provided with EMI FILTER.
9. according to the readiness control circuit described in claim 1-3,5-6 or 8 any one, it is characterised in that the pulsewidth is adjusted
Coremaking piece is FSB127H microchips.
10. a kind of display device, it is characterised in that including the readiness control circuit according to claim 1-9 any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310618726.7A CN103731618B (en) | 2013-11-27 | 2013-11-27 | Display device and its readiness control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310618726.7A CN103731618B (en) | 2013-11-27 | 2013-11-27 | Display device and its readiness control circuit |
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| Publication Number | Publication Date |
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| CN103731618A CN103731618A (en) | 2014-04-16 |
| CN103731618B true CN103731618B (en) | 2017-12-12 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105959600B (en) * | 2016-06-29 | 2023-04-07 | 重庆惠科金扬科技有限公司 | Circuit for quickly turning off TV indicator lamp after power failure and television |
| US11200837B2 (en) | 2018-09-25 | 2021-12-14 | Hisense Visual Technology Co., Ltd. | OLED display device, and method for controlling the OLED display device |
| WO2020062905A1 (en) * | 2018-09-25 | 2020-04-02 | 青岛海信电器股份有限公司 | Oled display device and control method therefor |
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|---|---|---|---|---|
| WO2004088829A1 (en) * | 2003-03-28 | 2004-10-14 | Sony Corporation | Switching power supply apparatus |
| CN201075823Y (en) * | 2007-08-15 | 2008-06-18 | 李世煌 | Compensation type switch power source |
| CN101232191A (en) * | 2007-12-14 | 2008-07-30 | 艾默生网络能源有限公司 | Uninterruptible power supply |
| CN101976107A (en) * | 2010-11-19 | 2011-02-16 | 东莞市金河田实业有限公司 | Power supply of zero-standby power consumption computer |
| CN203590331U (en) * | 2013-11-27 | 2014-05-07 | 乐视致新电子科技（天津）有限公司 | Display equipment and standby control circuit thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2653670Y (en) * | 2003-09-26 | 2004-11-03 | 杨家明 | Double knife switch |
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2013
- 2013-11-27 CN CN201310618726.7A patent/CN103731618B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004088829A1 (en) * | 2003-03-28 | 2004-10-14 | Sony Corporation | Switching power supply apparatus |
| CN201075823Y (en) * | 2007-08-15 | 2008-06-18 | 李世煌 | Compensation type switch power source |
| CN101232191A (en) * | 2007-12-14 | 2008-07-30 | 艾默生网络能源有限公司 | Uninterruptible power supply |
| CN101976107A (en) * | 2010-11-19 | 2011-02-16 | 东莞市金河田实业有限公司 | Power supply of zero-standby power consumption computer |
| CN203590331U (en) * | 2013-11-27 | 2014-05-07 | 乐视致新电子科技（天津）有限公司 | Display equipment and standby control circuit thereof |
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Address after: Room 301-1, Room 301-3, Area B2, Animation Building, No. 126 Animation Road, Zhongxin Eco-city, Tianjin Binhai New Area, Tianjin Patentee after: LE SHI ZHI XIN ELECTRONIC TECHNOLOGY (TIANJIN) Ltd. Address before: 300453 Tianjin Binhai New Area, Tianjin Eco-city, No. 126 Animation and Animation Center Road, Area B1, Second Floor 201-427 Patentee before: Xinle Visual Intelligent Electronic Technology (Tianjin) Co.,Ltd. Address after: 300453 Tianjin Binhai New Area, Tianjin Eco-city, No. 126 Animation and Animation Center Road, Area B1, Second Floor 201-427 Patentee after: Xinle Visual Intelligent Electronic Technology (Tianjin) Co.,Ltd. Address before: 300467 Tianjin Binhai New Area, ecological city, animation Middle Road, building, No. two, B1 District, 201-427 Patentee before: LE SHI ZHI XIN ELECTRONIC TECHNOLOGY (TIANJIN) Ltd. |
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