CN2582297Y - Low power consumption type inactive circuit for liquid crystal TV set - Google Patents
Low power consumption type inactive circuit for liquid crystal TV set Download PDFInfo
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- CN2582297Y CN2582297Y CN 02255703 CN02255703U CN2582297Y CN 2582297 Y CN2582297 Y CN 2582297Y CN 02255703 CN02255703 CN 02255703 CN 02255703 U CN02255703 U CN 02255703U CN 2582297 Y CN2582297 Y CN 2582297Y
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Abstract
The utility model relates to an inactive circuit with low power consumption for a liquid crystal TV, which is composed of a monolithic computer chip connected with a power supply circuit of a TV, a switch power supply connected with the 18V output end of a power supply of a TV, a three-terminal voltage regulator (LDO) with low pressure difference, two MOS pipe circuits IRF7314 of a double-P channel and four switch triodes whose base electrodes are respectively connected with the four output ends of the monolithic computer chip, wherein the output ends of the two IRF7314 circuits are respectively connected with a VPC3230D circuit of the TV, an AD9883 circuit, a PW1220 monolithic computer circuit, an SDRAM circuit, a brightness regulation circuit of a backlight lamp, a power supply of the backlight lamp and an accompanying sound processing and power amplification circuit; the monolithic computer chip can be a PW112 type chip. The utility model can be operated with low power consumption when the TV is inactive. Therefore, the utility model has the advantages of energy saving, capital saving, simple circuit and low cost. The utility model can be widely used for various liquid crystal TV sets.
Description
Technical field
The utility model belongs to technical field of television sets, more specifically to the design of the low-power consumption standby circuit of liquid crystal TV set.
Background technology
Existing most of television set does not use special-purpose low-power consumption standby circuit.Therefore,, bigger power consumption is arranged also, caused unnecessary energy loss even under holding state.Both waste user's fund, wasted social resource again.
The purpose of this utility model just is to overcome above-mentioned shortcoming and defect, and a kind of special use in the television set of can being installed in is provided, can low power operation when the television set standby, thus save the low-power consumption standby circuit of the liquid crystal TV set of the energy and fund.
Summary of the invention
In order to achieve the above object, the utility model is by the singlechip chip that is connected with the power circuit of television set, the Switching Power Supply that is connected with the 18V output of TV set power, the low pressure reduction three terminal regulator (LDO) that is connected with the 5V output of Switching Power Supply, the metal-oxide-semiconductor circuit I RF7314 of two P raceway grooves that its 3 pin is connected with the 3.3V output of LDO, second IRF7314 circuit that its 1 pin is connected with the 18V output of TV set power with and base stage respectively with the output Contro11 of singlechip chip, Contro12, Contro13, Contro14 connect and its collector electrode respectively with 2 of IRF7314 circuit, 2 of 4 pin and second IRF7314 circuit, 4 switch triodes that 4 pin connect are formed.The 5V output of Switching Power Supply also is connected with 1 pin of IRF7314 circuit and 3 pin of second IRF7314 circuit.The 5th, 6 pin of IRF7314 circuit are connected with the VPC3230D of television set.The 7th, 8 pin of IRF7314 circuit and the VPC3230D of television set and AD9883 and PW1220 and SDRAM are connected.5,6 pin of second IRF7314 circuit are connected with the brightness regulating circuit of the backlight of television set.7,8 pin of second IRF7314 circuit are connected with sound accompaniment processing and audio power amplifier circuit with the power supply of the backlight of television set.Above-mentioned singlechip chip is the PW112 type.
The power supply of 18V is converted to 5V by Switching Power Supply LM2576 earlier.The power supply of 5V is divided into three the tunnel subsequently.One the tunnel removes the low pressure reduction three terminal regulator (LDO) of 3.3V, the 3.3V that voltage stabilizing is come out goes the IRF7314 circuit to carry out on/off switch, and realization is to the Opportunity awaiting control for linear of the power supply of the 3.3V of decoding chip VPC3230D, A/D conversion chip AD9883, picture processing chip PW1220 and SDRAM chip.The other two-way of 5V directly goes the IRF7314 circuit to carry out on/off switch, and realization is to the control of the power supply of the 5V of liquid crystal display screen power supply and decoding chip VPC3230D.The power supply of the power supply of the sound accompaniment processing that in addition, power consumption is very big and the 18V of audio power amplifier circuit and the backlight of liquid crystal display screen also is to control by the IRF7314 circuit.During standby, the power supply of the power supply of audio power amplifier and acoustic processing chip is all controlled cut-out by the metal-oxide-semiconductor of IRF7314.Because the particularity of liquid crystal TV set, the power consumption of its backlight is very big.During start, can realize that backlight power supply, liquid crystal display screen power supply power on than other power supply hysteresis, to reduce the start big power consumption of moment by the control of software.
Therefore, under holding state, except that PW112 and peripheral circuit maintenance work thereof, remaining circuit all is cut off.By the control of software, can also make PW112 self also be in the low power operation pattern.Thereby reduced stand-by power consumption to greatest extent, the stand-by power consumption of actual complete machine can be less than 1.2W.
The purpose of this utility model comes to this and realizes.
Can low power operation when the utility model makes the television set standby, save the energy and fund, circuit is simple, and cost only has increase slightly.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Shown in Figure 1, the utility model by the metal-oxide-semiconductor IRF7314 circuit 5 of singlechip chip 1, the Switching Power Supply 3 that is connected with the 18V output 2 of TV set power, 4, two two P raceway grooves of low pressure reduction three terminal regulator (LDO) with 6 with and base stage form with 4 switch triodes 7～10 that four outputs of singlechip chip 1 are connected respectively.Two IRF7314 circuit 5 and 6 output are connected with sound accompaniment processing and audio power amplifier circuit 13 with the brightness regulating circuit 11 of VPC3230D circuit, AD9883 circuit, PW1220 single chip circuit, SDRAM circuit and the backlight of television set, the power supply 12 of backlight respectively.Above-mentioned singlechip chip 1 is the PW112 type.
Embodiment
The low-power consumption standby circuit of 1. 1 kinds of liquid crystal TV sets of embodiment, as shown in Figure 1.It by the metal-oxide-semiconductor circuit I RF7314 of the singlechip chip that is connected with the power circuit of television set, the Switching Power Supply that is connected with the 18V output of TV set power, low pressure reduction three terminal regulator (LDO), two two P raceway grooves with and base stage form with 4 switch triodes that four outputs of singlechip chip are connected respectively.The DC power supply of 18V is divided into two-way, and one the tunnel is input to 2 pin of switching power supply LM2576, and the 5V that voltage stabilizing is come out exports from 3 pin.Be divided into three the tunnel from the 5V of 3 pin output.Output to the pin 2 of three terminal regulator, the pin 1 of IRF7314 and the pin 3 of another IRF7314 respectively.The 5V that is input to three terminal regulator from its 3 pin output 3.3V, is input to the pin 3 of IRF7314 through after the voltage stabilizing subsequently.Other one road 18V is directly inputted to the pin 1 of another IRF7314.The four-way power supply that arrives two IRF7314 has like this been realized the circuit control of the hardware of standby power by two IRF7314 and four peripheral switch triodes 3904.Under holding state, export four tunnel control signal Contro11, Contro12, Contro13, Contro14 control output by CPU, with dump from 7,8,5,6 pin of two IRF7314 circuit.Thereby make except that the PW112 peripheral circuit work relevant with it, other circuit all is in dissengaged positions.
Overall Power Consumption during embodiment 1 standby is less than 1.2W.Power savings is fairly obvious.
Claims (2)
1. the low-power consumption standby circuit of a liquid crystal TV set, it is characterized in that it is by the singlechip chip that is connected with the power circuit of television set, the Switching Power Supply that is connected with the 18V output of TV set power, the low pressure reduction three terminal regulator (LDO) that is connected with the 5V output of Switching Power Supply, the metal-oxide-semiconductor circuit I RF7314 of two P raceway grooves that its 3 pin is connected with the 3.3V output of LDO, second IRF7314 circuit that its 1 pin is connected with the 18V output of TV set power with and base stage respectively with the output Contro11 of singlechip chip, Contro12, Contro13, Contro14 connect and its collector electrode respectively with 2 of IRF7314 circuit, 2 of 4 pin and second IRF7314 circuit, 4 switch triodes that 4 pin connect are formed, the 5V output of Switching Power Supply also is connected with 1 pin of IRF7314 circuit and 3 pin of second IRF7314 circuit, the 5th of IRF7314 circuit, 6 pin are connected with the VPC3230D of television set, the 7th of IRF7314 circuit, the VPC3230D of 8 pin and television set and AD9883 and PW1220 and SDRAM are connected, 5 of second IRF7314 circuit, 6 pin are connected with the brightness regulating circuit of the backlight of television set, 7 of second IRF7314 circuit, 8 pin are connected with sound accompaniment processing and audio power amplifier circuit with the power supply of the backlight of television set.
2. according to the low-power consumption standby circuit of the described liquid crystal TV set of claim 1, it is characterized in that said singlechip chip is the PW112 type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02255703 CN2582297Y (en) | 2002-11-29 | 2002-11-29 | Low power consumption type inactive circuit for liquid crystal TV set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02255703 CN2582297Y (en) | 2002-11-29 | 2002-11-29 | Low power consumption type inactive circuit for liquid crystal TV set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2582297Y true CN2582297Y (en) | 2003-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02255703 Expired - Fee Related CN2582297Y (en) | 2002-11-29 | 2002-11-29 | Low power consumption type inactive circuit for liquid crystal TV set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2582297Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352273C (en) * | 2005-12-05 | 2007-11-28 | 深圳创维－Rgb电子有限公司 | Stand by control circuit of TV set and TV set with said stand by control circuit |
| CN100383687C (en) * | 2005-02-23 | 2008-04-23 | 冠捷科技（北京）有限公司 | Electricity saving controller |
| CN100466701C (en) * | 2004-08-13 | 2009-03-04 | Tcl王牌电子(深圳)有限公司 | Low-power consumption stand by circuit of TV set |
| CN101197979B (en) * | 2007-12-05 | 2010-10-06 | 深圳创维数字技术股份有限公司 | Energy-saving standby system of digital television receiver |
| CN102930834A (en) * | 2012-11-15 | 2013-02-13 | 深圳市华星光电技术有限公司 | Method for reducing standby power consumption |
| CN103488228A (en) * | 2013-09-12 | 2014-01-01 | 天脉聚源(北京)传媒科技有限公司 | Output voltage control circuit |
-
2002
- 2002-11-29 CN CN 02255703 patent/CN2582297Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100466701C (en) * | 2004-08-13 | 2009-03-04 | Tcl王牌电子(深圳)有限公司 | Low-power consumption stand by circuit of TV set |
| CN100383687C (en) * | 2005-02-23 | 2008-04-23 | 冠捷科技（北京）有限公司 | Electricity saving controller |
| CN100352273C (en) * | 2005-12-05 | 2007-11-28 | 深圳创维－Rgb电子有限公司 | Stand by control circuit of TV set and TV set with said stand by control circuit |
| CN101197979B (en) * | 2007-12-05 | 2010-10-06 | 深圳创维数字技术股份有限公司 | Energy-saving standby system of digital television receiver |
| CN102930834A (en) * | 2012-11-15 | 2013-02-13 | 深圳市华星光电技术有限公司 | Method for reducing standby power consumption |
| CN102930834B (en) * | 2012-11-15 | 2014-11-05 | 深圳市华星光电技术有限公司 | Method for reducing standby power consumption |
| CN103488228A (en) * | 2013-09-12 | 2014-01-01 | 天脉聚源(北京)传媒科技有限公司 | Output voltage control circuit |
| CN103488228B (en) * | 2013-09-12 | 2015-06-10 | 天脉聚源(北京)传媒科技有限公司 | Output voltage control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |