CN105959600A - Circuit capable of quickly turning off TV indicator lamp after power off, and television - Google Patents
Circuit capable of quickly turning off TV indicator lamp after power off, and television Download PDFInfo
- Publication number
- CN105959600A CN105959600A CN201610495603.2A CN201610495603A CN105959600A CN 105959600 A CN105959600 A CN 105959600A CN 201610495603 A CN201610495603 A CN 201610495603A CN 105959600 A CN105959600 A CN 105959600A
- Authority
- CN
- China
- Prior art keywords
- audion
- switching tube
- resistance
- electrochemical capacitor
- quickly
- 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.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The present invention belongs to the technical field of power control, and particularly relates to a circuit capable of quickly turning off a TV indicator lamp after power off, and a television. The circuit capable of quickly turning off the TV indicator lamp after power off is provided with a unit capable of quickly turning off the TV indicator lamp. After the television is power off, the unit quickly turning off the TV indicator lamp discharges an electrolytic capacitor in a direct current output unit, so as to turn off the TV indicator lamp quickly, so that a problem that an existing television indicator lamp ages due to long time work is solved.
Description
Technical field
The invention belongs to power supply and control technical field, after particularly relating to a kind of power down, quickly extinguish TV display lamp
Circuit and television set.
Background technology
The standard be given according to certification authority, present television set be all requirement stand-by power consumption at below 0.5W,
So existing TV power panel all must use the scheme of low standby power loss to meet design requirement, set at these
Under the conditions of meter scheme, when, after input power power-off, big electrochemical capacitor primary in power panel and secondary export
In filter capacitor storage electric energy be can not abrupt release out, thus arise that shutoff alternating current after,
Display lamp on television set also can persistently be lighted for a long time, some type two or three minutes rear indicator light or bright.
So television indicator light can be aging because of working long hours.
Summary of the invention
The purpose of the embodiment of the present invention quickly extinguishes TV indicator light circuit and TV after being to provide a kind of power down
Machine, it is intended to solve the problem that existing television indicator light can be aging because of working long hours.
The embodiment of the present invention quickly extinguishes TV indicator light circuit, with friendship after being achieved in that a kind of power down
Stream input circuit connects, and quickly extinguishes TV indicator light circuit and include after described power down:
It is connected with described ac input circuit, the DC output unit to TV main board power supply；
It is connected with described DC output unit, the electrochemical capacitor in described DC output unit is discharged,
That extinguishes TV display lamp quickly extinguishes TV indicator unit.
In said structure, described DC output unit includes:
Schottky diode D1, electrochemical capacitor C1, electrochemical capacitor C2, electrochemical capacitor C3, inductance L1；
The anode of described Schottky diode D1 meets the transformer secondary coil of described ac input circuit, institute
The negative electrode stating Schottky diode D1 connects first end of described inductance L1, second termination of described inductance L1
Described TV mainboard and quickly extinguishing TV indicator unit, described electrochemical capacitor C1 and electrochemical capacitor C2 is also
Being associated between the first end and the ground of described inductance L1, described electrochemical capacitor C3 is connected to described inductance L1's
Between second end and ground.
In said structure, described quick extinguishing TV indicator unit includes:
Diode D2, resistance R1, resistance R2, resistance R3, filter capacitor C4, filter capacitor C5 and
Switching tube；
The anode of described diode D2 connects the transformer secondary coil of described ac input circuit, described two poles
The negative electrode of pipe D2 connects first end of described resistance R1, the second described switching tube of termination of described resistance R1
Controlling end, described resistance R2, filter capacitor C4 and filter capacitor C5 are connected in parallel on the control of described switching tube
Between end and ground, the first end of described switching tube connects second end of described inductance L1 by described resistance R3,
Second end ground connection of described switching tube.
In said structure, described switching tube includes audion Q1 and audion Q2, described audion Q1's
Base stage is the control end of described switching tube, and the colelctor electrode of described audion Q1 and the colelctor electrode of audion Q2 are same
Time ground connection, the emitter stage of described audion Q1 connects the base stage of described audion Q2, described audion Q2's
Launch the first end of the most described switching tube.
The another object of the embodiment of the present invention is to provide a kind of television set, including quickly extinguishing TV after power down
Indicator light circuit, is connected with ac input circuit, quickly extinguishes TV indicator light circuit and include after described power down:
It is connected with described ac input circuit, the DC output unit to TV main board power supply；
It is connected with described DC output unit, the electrochemical capacitor in described DC output unit is discharged,
That extinguishes TV display lamp quickly extinguishes TV indicator unit.
In said structure, described DC output unit includes:
Schottky diode D1, electrochemical capacitor C1, electrochemical capacitor C2, electrochemical capacitor C3, inductance L1；
The anode of described Schottky diode D1 meets the transformer secondary coil of described ac input circuit, institute
The negative electrode stating Schottky diode D1 connects first end of described inductance L1, second termination of described inductance L1
Described TV mainboard and quickly extinguishing TV indicator unit, described electrochemical capacitor C1 and electrochemical capacitor C2 is also
Being associated between the first end and the ground of described inductance L1, described electrochemical capacitor C3 is connected to described inductance L1's
Between second end and ground.
In said structure, described quick extinguishing TV indicator unit includes:
Diode D2, resistance R1, resistance R2, resistance R3, filter capacitor C4, filter capacitor C5 and
Switching tube；
The anode of described diode D2 connects the transformer secondary coil of described ac input circuit, described two poles
The negative electrode of pipe D2 connects first end of described resistance R1, the second described switching tube of termination of described resistance R1
Controlling end, described resistance R2, filter capacitor C4 and filter capacitor C5 are connected in parallel on the control of described switching tube
Between end and ground, the first end of described switching tube connects second end of described inductance L1 by described resistance R3,
Second end ground connection of described switching tube.
In said structure, described switching tube includes audion Q1 and audion Q2, described audion Q1's
Base stage is the control end of described switching tube, and the colelctor electrode of described audion Q1 and the colelctor electrode of audion Q2 are same
Time ground connection, the emitter stage of described audion Q1 connects the base stage of described audion Q2, described audion Q2's
Launch the first end of the most described switching tube.
In embodiments of the present invention, quickly extinguish TV indicator light circuit after power down to be provided with and quickly extinguish TV
Indicator unit, after television set power-off, quickly extinguishes TV indicator unit in DC output unit
Electrochemical capacitor discharges, it is thus possible to quickly extinguish TV display lamp, solves existing television indicator light meeting
The problem aging because of working long hours.
Accompanying drawing explanation
Fig. 1 is the quick structure chart extinguishing TV indicator light circuit after the power down that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
Only in order to explain the present invention, it is not intended to limit the present invention.
Fig. 1 quickly extinguishes the structure of TV indicator light circuit after showing the power down that the embodiment of the present invention provides,
For convenience of description, illustrate only the part relevant to the embodiment of the present invention.
Quickly extinguish TV indicator light circuit after a kind of power down, be connected with ac input circuit 10, described power down
The rear TV indicator light circuit that quickly extinguishes includes:
It is connected with described ac input circuit 10, the DC output unit 1 to TV mainboard 20 power supply；
It is connected with described DC output unit 1, the electrochemical capacitor in described DC output unit 1 is put
Electricity, that extinguishes TV display lamp quickly extinguishes TV indicator unit 2.
As one embodiment of the invention, described DC output unit 1 includes:
Schottky diode D1, electrochemical capacitor C1, electrochemical capacitor C2, electrochemical capacitor C3, inductance L1；
The anode of described Schottky diode D1 connects the transformer secondary coil of described ac input circuit 10,
The negative electrode of described Schottky diode D1 connects first end of described inductance L1, second end of described inductance L1
Connect described TV mainboard 20 and quickly extinguish TV indicator unit 2, described electrochemical capacitor C1 and electrolysis electricity
Holding between the first end and the ground that C2 is connected in parallel on described inductance L1, described electrochemical capacitor C3 is connected to described electricity
Between second end and the ground of sense L1.
As one embodiment of the invention, described quick extinguishing TV indicator unit 2 includes:
Diode D2, resistance R1, resistance R2, resistance R3, filter capacitor C4, filter capacitor C5 and
Switching tube 21；
The anode of described diode D2 connects the transformer secondary coil of described ac input circuit 10, and described two
The negative electrode of pole pipe D2 connects first end of described resistance R1, the second described switching tube of termination of described resistance R1
The control end of 21, described resistance R2, filter capacitor C4 and filter capacitor C5 are connected in parallel on described switching tube 21
Control end and ground between, the first end of described switching tube 21 meets described inductance L1 by described resistance R3
The second end, the second end ground connection of described switching tube 21.
As one embodiment of the invention, described switching tube 21 includes audion Q1 and audion Q2, described
The base stage of audion Q1 is the control end of described switching tube 21, the colelctor electrode of described audion Q1 and three poles
The colelctor electrode of pipe Q2 ground connection simultaneously, the emitter stage of described audion Q1 connects the base stage of described audion Q2,
First end of the most described switching tube of transmitting 21 of described audion Q2.
The embodiment of the present invention also provides for a kind of television set, including quickly extinguishing TV indicator light circuit after power down,
It is connected with ac input circuit 10, quickly extinguishes TV indicator light circuit after described power down and include:
It is connected with described ac input circuit 10, the DC output unit 1 to TV mainboard 20 power supply；
It is connected with described DC output unit 1, the electrochemical capacitor in described DC output unit 1 is put
Electricity, that extinguishes TV display lamp quickly extinguishes TV indicator unit 2.
As one embodiment of the invention, described DC output unit 1 includes:
Schottky diode D1, electrochemical capacitor C1, electrochemical capacitor C2, electrochemical capacitor C3, inductance L1；
The anode of described Schottky diode D1 connects the transformer secondary coil of described ac input circuit 10,
The negative electrode of described Schottky diode D1 connects first end of described inductance L1, second end of described inductance L1
Connect described TV mainboard 20 and quickly extinguish TV indicator unit 2, described electrochemical capacitor C1 and electrolysis electricity
Holding between the first end and the ground that C2 is connected in parallel on described inductance L1, described electrochemical capacitor C3 is connected to described electricity
Between second end and the ground of sense L1.
As one embodiment of the invention, described quick extinguishing TV indicator unit 2 includes:
Diode D2, resistance R1, resistance R2, resistance R3, filter capacitor C4, filter capacitor C5 and
Switching tube 21；
The anode of described diode D2 connects the transformer secondary coil of described ac input circuit 10, and described two
The negative electrode of pole pipe D2 connects first end of described resistance R1, the second described switching tube of termination of described resistance R1
The control end of 21, described resistance R2, filter capacitor C4 and filter capacitor C5 are connected in parallel on described switching tube 21
Control end and ground between, the first end of described switching tube 21 meets described inductance L1 by described resistance R3
The second end, the second end ground connection of described switching tube 21.
As one embodiment of the invention, described switching tube 21 includes audion Q1 and audion Q2, described
The base stage of audion Q1 is the control end of described switching tube 21, the colelctor electrode of described audion Q1 and three poles
The colelctor electrode of pipe Q2 ground connection simultaneously, the emitter stage of described audion Q1 connects the base stage of described audion Q2,
First end of the most described switching tube of transmitting 21 of described audion Q2.
The operation principle quickly extinguishing TV indicator light circuit after power down is:
Alternating current AC inputs from ac input circuit 10, after DC output unit 1 rectifying and wave-filtering, defeated
Go out a stable 5V direct current to supply electricity to TV mainboard 20 and power.
Because TV mainboard 20 is when standby, it is power taking above 5VSB, when normally working, electrochemical capacitor
C1, electrochemical capacitor C2, electrochemical capacitor C3 are to strobe, owing to their Capacity Ratio is relatively big, and electric capacity
The electric energy of upper storage also compares many, when after AC power-off, and the enough TV masters of energy that these three electric capacity is stored
Work the longest break time when plate is standby, so display lamp meeting continuous firing is for a long time, and increases now and quickly put out
Go out TV indicator unit 2, it is simply that can be quickly electrochemical capacitor C1, electrochemical capacitor after AC power-off
On C2, tri-electrochemical capacitors of electrochemical capacitor C3, the electric energy of storage is bled off, thus reaches TV mainboard because not having
The electric energy that persistently maintains and quick closedown display lamp.The operation principle of detailed repid discharge is as follows: diode
D2 is connected on transformer secondary output together with Schottky D1, when working properly, through D2 rectification, resistance R1
And R2 dividing potential drop, then after electric capacity C4, C5 filter, obtain the unidirectional current of an about 3V, 3V electricity
Pressure is powered to audion Q1 base stage, because Q1 is PNP type triode, when base stage has a high level electricity
Pressure, this audion is not turn on, and the emitter stage of Q1 is connected with audion Q2 base stage, because Q1 does not has
Leading energy, emitter stage is in vacant state, so Q2 is also in cut-off state, resistance R3 and electrochemical capacitor
C1, electrochemical capacitor C2, electrochemical capacitor C3 are connected also will not form loop, the most quickly extinguishes TV
Indicator unit 2 is idle.When, after AC power-off, primary circuit and DC circuit be not all because having electricity
And do not work, diode D2 also will not work, and the base voltage of audion Q1 will quickly be converted to low
Level, so that audion Q1 conducting, audion Q2 is as base voltage drags down and becomes conducting
State, such Q2 emitter stage is connected with R3 and will form a loop, because the resistance of R3 is 100 Europe
Nurse, so will quickly, thus realize electrochemical capacitor C1, electrochemical capacitor C2, electrochemical capacitor C3 electric discharge
The quickly purpose to electric capacity electric discharge.Without the electric energy of storage on electric capacity, that TV mainboard 20 also cannot work
Make, the problem therefore reaching to solve quickly to extinguish display lamp.
In embodiments of the present invention, quickly extinguish TV indicator light circuit after power down to be provided with and quickly extinguish TV and refer to
Show lamp unit, after television set power-off, quickly extinguish TV indicator unit to the electrolysis in DC output unit
Electric capacity discharges, it is thus possible to quickly extinguish TV display lamp, solving existing television indicator light can be because of long
Time service and aging problem.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.
Claims (8)
1. quickly extinguishing a TV indicator light circuit after power down, be connected with ac input circuit, its feature exists
In, quickly extinguish TV indicator light circuit after described power down and include:
It is connected with described ac input circuit, the DC output unit to TV main board power supply；
It is connected with described DC output unit, the electrochemical capacitor in described DC output unit is discharged,
That extinguishes TV display lamp quickly extinguishes TV indicator unit.
2. quickly extinguish TV indicator light circuit after power down as claimed in claim 1, it is characterised in that institute
State DC output unit to include:
Schottky diode D1, electrochemical capacitor C1, electrochemical capacitor C2, electrochemical capacitor C3, inductance L1；
The anode of described Schottky diode D1 meets the transformer secondary coil of described ac input circuit, institute
The negative electrode stating Schottky diode D1 connects first end of described inductance L1, second termination of described inductance L1
Described TV mainboard and quickly extinguishing TV indicator unit, described electrochemical capacitor C1 and electrochemical capacitor C2 is also
Being associated between the first end and the ground of described inductance L1, described electrochemical capacitor C3 is connected to described inductance L1's
Between second end and ground.
3. quickly extinguish TV indicator light circuit after power down as claimed in claim 2, it is characterised in that institute
State quickly extinguishing TV indicator unit to include:
Diode D2, resistance R1, resistance R2, resistance R3, filter capacitor C4, filter capacitor C5 and
Switching tube；
The anode of described diode D2 connects the transformer secondary coil of described ac input circuit, described two poles
The negative electrode of pipe D2 connects first end of described resistance R1, the second described switching tube of termination of described resistance R1
Controlling end, described resistance R2, filter capacitor C4 and filter capacitor C5 are connected in parallel on the control of described switching tube
Between end and ground, the first end of described switching tube connects second end of described inductance L1 by described resistance R3,
Second end ground connection of described switching tube.
4. quickly extinguish TV indicator light circuit after power down as claimed in claim 3, it is characterised in that institute
State switching tube and include that audion Q1 and audion Q2, the base stage of described audion Q1 are described switching tube
Control end, the colelctor electrode of described audion Q1 and the colelctor electrode of audion Q2 ground connection, described audion simultaneously
The emitter stage of Q1 connects the base stage of described audion Q2, the most described switching tube of transmitting of described audion Q2
The first end.
5. a television set, including quickly extinguishing TV indicator light circuit after power down, with ac input circuit even
Connect, it is characterised in that quickly extinguish TV indicator light circuit after described power down and include:
It is connected with described ac input circuit, the DC output unit to TV main board power supply；
It is connected with described DC output unit, the electrochemical capacitor in described DC output unit is discharged,
That extinguishes TV display lamp quickly extinguishes TV indicator unit.
6. television set as claimed in claim 5, it is characterised in that described DC output unit includes:
Schottky diode D1, electrochemical capacitor C1, electrochemical capacitor C2, electrochemical capacitor C3, inductance L1；
The anode of described Schottky diode D1 meets the transformer secondary coil of described ac input circuit, institute
The negative electrode stating Schottky diode D1 connects first end of described inductance L1, second termination of described inductance L1
Described TV mainboard and quickly extinguishing TV indicator unit, described electrochemical capacitor C1 and electrochemical capacitor C2 is also
Being associated between the first end and the ground of described inductance L1, described electrochemical capacitor C3 is connected to described inductance L1's
Between second end and ground.
7. television set as claimed in claim 6, it is characterised in that described quick extinguishing TV display lamp list
Unit includes:
Diode D2, resistance R1, resistance R2, resistance R3, filter capacitor C4, filter capacitor C5 and
Switching tube；
The anode of described diode D2 connects the transformer secondary coil of described ac input circuit, described two poles
The negative electrode of pipe D2 connects first end of described resistance R1, the second described switching tube of termination of described resistance R1
Controlling end, described resistance R2, filter capacitor C4 and filter capacitor C5 are connected in parallel on the control of described switching tube
Between end and ground, the first end of described switching tube connects second end of described inductance L1 by described resistance R3,
Second end ground connection of described switching tube.
8. television set as claimed in claim 7, it is characterised in that described switching tube includes audion Q1
With the control end that base stage is described switching tube of audion Q2, described audion Q1, described audion Q1
Colelctor electrode and the colelctor electrode simultaneously ground connection of audion Q2, the emitter stage of described audion Q1 connects described three poles
The base stage of pipe Q2, the first end of the most described switching tube of transmitting of described audion Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610495603.2A CN105959600B (en) | 2016-06-29 | 2016-06-29 | Circuit for quickly turning off TV indicator lamp after power failure and television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610495603.2A CN105959600B (en) | 2016-06-29 | 2016-06-29 | Circuit for quickly turning off TV indicator lamp after power failure and television |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105959600A true CN105959600A (en) | 2016-09-21 |
| CN105959600B CN105959600B (en) | 2023-04-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610495603.2A Active CN105959600B (en) | 2016-06-29 | 2016-06-29 | Circuit for quickly turning off TV indicator lamp after power failure and television |
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| Publication number | Publication date |
|---|---|
| CN105959600B (en) | 2023-04-07 |
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