CN101568210B - Television indicator light circuit capable of reducing the standby power consumption - Google Patents
Television indicator light circuit capable of reducing the standby power consumption Download PDFInfo
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- CN101568210B CN101568210B CN2009101069821A CN200910106982A CN101568210B CN 101568210 B CN101568210 B CN 101568210B CN 2009101069821 A CN2009101069821 A CN 2009101069821A CN 200910106982 A CN200910106982 A CN 200910106982A CN 101568210 B CN101568210 B CN 101568210B
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Abstract
The invention discloses a television indicator light circuit capable of reducing the standby power consumption, comprising a CPU circuit, a control circuit connected with the CPU circuit and a light-emitting diode circuit connected with the control circuit, wherein the control circuit comprises a first triode Q46, a second triode Q47 connected with the first triode Q46 by a fourth resistance R4; and the light-emitting diode circuit comprises a double-color light-emitting diode and a sixth resistance R6 connected with the double-color light-emitting diode. The CPU controls the I/O port of the indicator out of work when the television is at standby state and the triode of the light-emitting diode is controlled at cut-off stage, therefore the television standby power consumption is reduced.
Description
[technical field]
The present invention relates to technical field of television sets, particularly a kind of television indicator light circuit that reduces stand-by power consumption.
[background technology]
Television set becomes the requisite household electrical appliance of people's daily life now, and the increasing time is used by people.Temporarily do not use under the situation of television set people many times, often television set is set to holding state.So both conveniently open television set again, also be convenient to reduce under without the situation of television set the dissipation of power.Method with light-emitting diode indication TV machine state (start or standby) generally is used for current system for TV set.Generally all adopt the sign of the light-emitting diode of different patterns at present as power supply indicator.Particularly dichromatic LED as the color television set of indicator light at ubiquity on the market, when TV was in different conditions, indicator light showed various colors.The mode of controlling this dichromatic LED has a lot, and for example: the I/O mouth output high level with control IC is lighted light-emitting diode, and perhaps the I/O mouth output low level of control IC makes light-emitting diode light or the like for high level after the anti-phase of process triode.Because the power consumption of light-emitting diode is little, so generally all do not consider the power problems under the holding state.Yet when user's television set was set to holding state, power supply indicator often was in bright state, and the electric energy that long-time standby consumes is very big, and this makes that under holding state the power consumption that how to reduce television set just becomes extremely important.
[summary of the invention]
For addressing the above problem, main purpose of the present invention is to provide a kind of television indicator light circuit that reduces stand-by power consumption.
For realizing above-mentioned purpose, technical scheme of the present invention is:
A kind of television indicator light circuit that reduces stand-by power consumption, comprise cpu circuit, the control circuit that is connected with cpu circuit and with the circuit of LED that is connected control circuit; Wherein, said control circuit includes the first triode Q46, passes through the second triode Q47 that one the 4th resistance R 4 is connected with the first triode Q46; And the 6th resistance R 6 that said circuit of LED includes dichromatic LED and is connected with dichromatic LED.
Compared to prior art; The present invention can reduce the television indicator light circuit of stand-by power consumption, and when television set was in holding state, the I/O mouth of CPU control indicator light was not worked; The triode of control light-emitting diode is in cut-off state, thereby reduces standby power consumption of television set.
[description of drawings]
Fig. 1 is a circuit theory diagram of the present invention.
[embodiment]
A kind of television indicator light circuit that reduces stand-by power consumption of the present invention; When television set was in holding state, the I/O mouth of CPU control indicator light was not worked, and the triode of control light-emitting diode is in cut-off state; Thereby reach under holding state, reduce the purpose of the whole stand-by power consumption of television set.
See also shown in Figure 1, a kind of television indicator light circuit that reduces stand-by power consumption of the present invention comprise cpu circuit, the control circuit that is connected with cpu circuit and with the circuit of LED that is connected control circuit.Said control circuit includes the first triode Q46, passes through the second triode Q47 of one the 4th resistance R 4 and the first triode Q46.Wherein, the first triode Q46 is connected to the I/O mouth of CPU control light-emitting diode through second resistance R 2.Power supply+12V passes through the DC-DC voltage transitions, passes through low pressure drop (LDO) linear voltage regulator again and converts into+3.3AVDD, and+3.3AVDD connects second resistance R, 2 one ends through first resistance R 1, and second resistance R, 2 other ends connect the base stage of the first triode Q46.The collector electrode of the first triode Q46 is connected with 5VSTB through the 3rd resistance R 3, and the collector electrode of the first triode Q46 passes through the base stage that the 4th resistance R 4 connects the second triode Q47 simultaneously, and the collector electrode of the second triode Q47 connects circuit of LED.The 6th resistance R 6 that circuit of LED includes dichromatic LED and is connected with dichromatic LED.Said dichromatic LED has three pins 1,2,3, for convenient explanation, among Fig. 1 dichromatic LED separately is expressed as red diodes D2A and green diode D1B, and the 2nd pin is red diodes D2A and the public pin of green diode D1B.Wherein, red diodes D2A is promptly connected the collector electrode of the first triode Q46 through the collector electrode of the 5th resistance R 5 connections first triode Q46 through the 5th resistance R 5 by the 1st pin of dichromatic LED; 5V-1F is connected to green diode D1B (being the 3rd pin of dichromatic LED) through the 6th resistance R 6, and the collector electrode of the second triode Q47 also is connected to green diode D1B simultaneously.The 2nd pin common ground of the emitter of first, second triode Q46, Q47 and dichromatic LED.
The power supply of television boot-strap state is output as+12V, and through the DC-DC voltage transitions, general+12V converts into+5V.Wherein ,+5V a part becomes+5V-IF through magnetic bead, and a part converts into+3.3AVDD through LDO.Because exporting, power supply+12V is reduced to 0 at holding state.So corresponding+5V, 5V-IF ,+3.3AVDD all is reduced to 0 voltage, and no matter 5VSTB then is positive 5V high level in start or holding state.
Under holding state, the I/O mouth of CPU control light-emitting diode is a low level, and promptly LED is a low level.Simultaneously, power supply+12V is 0 during standby, so+3.3AVDD also is 0 level.The base stage of the first triode Q46 is 0 voltage, and grounded emitter voltage is 0, is in cut-off state; And collector voltage is high level+2.2V, and promptly LED_I/O is a high level, and this high level makes that through the 5th resistance R 5 red diodes D2A is luminous, is used for indication television set this moment and is in holding state.Because LED_I/O is a high level, so the base stage of the second triode Q47 is a high level, under holding state; 5V-IF is 0 level; Collector voltage through the 6th resistance R 6, the second triode Q47 also is 0, and the grounded emitter of the second triode Q47 is 0 voltage; So the second triode Q47 ends, the 6th resistance R 6 voltage are 0.At this moment, being used to indicate television set is that the green diode D1B (being GREEN) of open state is not luminous, and light-emitting diode D1B is not luminous.Under holding state, the part control circuit of CPU control led status can not worked, and first, second triode Q46, Q47 also be in cut-off state, so greatly reduce the stand-by power consumption under the holding state.
Under the open state, when television set received starting-up signal, power supply+12V work provided positive 12V voltage, the each several part service restoration.This moment corresponding+3.3AVDD, 5VSTB, 5V-IF are high level.CPU work this moment, the I/O mouth of control indicator light sends high level, and promptly LED is a high level.This high level through with+first resistance R 1 that 3.3AVDD links to each other on high level is supplied to the base stage of the first triode Q46 after drawing.The collector electrode of the first triode Q46 offers high level by 5VSTB through the 3rd resistance R 3, so the first triode Q46 conducting.The grounded emitter of the first triode Q46 makes after the conducting that collector electrode is dragged down, so LED_I/O is a low level, this moment, red diodes D2A was not luminous, did not promptly send out a warning.The low level of LED_I/O makes that the base stage of the second triode Q47 is a low level, and the grounded emitter of the second triode Q47 is 0, so the second triode Q47 ends.5V-IF gives green diode D1B power supply through the 6th resistance R 6, makes green diode D1B luminous, gives a green light.So television set is in the open state green light, indicator light is shown in green.Glow at holding state, indicator light is red.
Most preferred embodiment described above only is that the present invention is set forth and explains, but is not limited to disclosed any concrete form, and it is possible carrying out many modifications and variation.
Claims (4)
1. television indicator light circuit that can reduce stand-by power consumption; Comprise cpu circuit, the control circuit that is connected with cpu circuit and with the circuit of LED that is connected control circuit, it is characterized in that: second triode (Q47) that said control circuit includes first triode (Q46), is connected with first triode (Q46) through one the 4th resistance (R4); And said circuit of LED includes dichromatic LED and the 6th resistance (R6) that is connected with dichromatic LED; Said first triode (Q46) is connected to the I/O mouth of CPU control light-emitting diode through second resistance (R2); Power supply+12V through the DC-DC voltage transitions is+5V; Convert into+3.3AVDD through low-voltage-drop linear voltage regulator again; + 3.3AVDD connects second resistance (R2) end through first resistance (R1), and the other end of second resistance (R2) connects the base stage of first triode (Q46); The collector electrode of said first triode (Q46) is connected with 5VSTB standby power supply through the 3rd resistance (R3); The collector electrode of first triode (Q46) passes through the base stage that the 4th resistance (R4) connects second triode (Q47) simultaneously, and the collector electrode of second triode (Q47) connects circuit of LED.
2. the television indicator light circuit that reduces stand-by power consumption as claimed in claim 1; It is characterized in that: said dichromatic LED includes red diodes (D2A) and green diode (D1B); It has three pins (1), (2), (3); Wherein, the 2nd pin (2) is red diodes (D2A) and the public pin of green diode (D1B).
3. the television indicator light circuit that reduces stand-by power consumption as claimed in claim 2 is characterized in that: the 1st pin (1) of said red light emitting diodes connects the collector electrode of first triode (Q46) through the 5th resistance (R5); 5V-IF is connected to the 3rd pin (3) of dichromatic LED through the 6th resistance (R6); Simultaneously, the collector electrode of second triode (Q47) also is connected to green diode (D1B).
4. the television indicator light circuit that reduces stand-by power consumption as claimed in claim 3 is characterized in that: the 2nd pin (2) common ground of the emitter of said first, second triode (Q46), (Q47) and dichromatic LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101069821A CN101568210B (en) | 2009-05-15 | 2009-05-15 | Television indicator light circuit capable of reducing the standby power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101069821A CN101568210B (en) | 2009-05-15 | 2009-05-15 | Television indicator light circuit capable of reducing the standby power consumption |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101568210A CN101568210A (en) | 2009-10-28 |
| CN101568210B true CN101568210B (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101069821A Expired - Fee Related CN101568210B (en) | 2009-05-15 | 2009-05-15 | Television indicator light circuit capable of reducing the standby power consumption |
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| CN (1) | CN101568210B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123543B (en) * | 2010-11-12 | 2015-01-21 | 康佳集团股份有限公司 | Indicating lamp control circuit of television and television |
| CN102395016A (en) * | 2011-11-23 | 2012-03-28 | 上海大亚科技有限公司 | Control circuit structure for realization of low power standby in set-top box device |
| CN109121255B (en) * | 2018-10-09 | 2020-09-01 | 深圳市亿联智能有限公司 | Control circuit for controlling operation of two LED lamps by using single IO port |
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2009
- 2009-05-15 CN CN2009101069821A patent/CN101568210B/en not_active Expired - Fee Related
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| CN101568210A (en) | 2009-10-28 |
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