CN201532756U - Power supply switch device for LCD TV - Google Patents
Power supply switch device for LCD TV Download PDFInfo
- Publication number
- CN201532756U CN201532756U CN2009202055465U CN200920205546U CN201532756U CN 201532756 U CN201532756 U CN 201532756U CN 2009202055465 U CN2009202055465 U CN 2009202055465U CN 200920205546 U CN200920205546 U CN 200920205546U CN 201532756 U CN201532756 U CN 201532756U
- Authority
- CN
- China
- Prior art keywords
- power supply
- module
- pin
- lcd
- liquid crystal
- 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.)
- Expired - Fee Related
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 33
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 claims description 18
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 claims description 18
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The utility model discloses a power supply switch device for an LCD TV, which aims to realize that partial power supply of the power supply switch device of the LCD TV can be turned off in specific working mode of the TV, and has the advantages of simple circuit, low power consumption, and high security of the TV system. The utility model adopts the technical scheme that the first output power supply VCC 1 pin of the power module of the LCD TV is connected with the power input VCC-IN pin of a load module through a diode VD1; the standby power supply VCC- stb pin of the power module of the LCD TV is connected with a MCU control module, and also connected with the power input VCC- IN pin of the load module through two diodes VD2; the second output power supply VCC 2 of the power module of the LCD TV is connected with a backlight module; and the switch control ON/OFF pin of the power module of the LCD TV is connected with the universal input output control port GPIO of the MCU. Compared with the prior art, the utility model can realize the switching of the main power supply and auxiliary power supply of the LCD TV, so that the power module can be in an energy-saving mode, and the security of the TV system is improved.
Description
Technical field
The utility model relates to a kind of liquid crystal television power supply switching device shifter, particularly a kind of liquid crystal television power supply switching device shifter with energy saver mode.
Background technology
The liquid crystal television power supply switching device shifter of prior art generally adopts VCC-stb and the VCC1 mode that Each performs its own functions, as shown in Figure 1, the VCC-stb of liquid crystal television power supply module is less because of load capacity, the main electric of being responsible for standby and starting shooting and all need power, the electric that can turn-off after mainly responsible big electric current of VCC1 and the standby, when (when being in the standby download) under certain mode of operation as Web TV, the load current of VCC1 power supply relatively hour, VCC-stb can bear this part electric current fully, but this moment, VCC1 still will export, so both waste the electric energy of liquid crystal television power supply module work, increased potential safety hazard again.
Summary of the invention
The purpose of this utility model provides a kind of liquid crystal television power supply switching device shifter, the technical matters that solves is the part power supply that can turn-off the liquid crystal television power supply switching device shifter when realizing the specific operation mode of televisor, its circuit is simple, low in energy consumption, system for TV set safe.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of liquid crystal television power supply switching device shifter, comprise the liquid crystal television power supply module, backlight module, load blocks and MCU control module, described liquid crystal television power supply module connects backlight module and MCU control module respectively, the first out-put supply VCC1 pin of described liquid crystal television power supply module connects the power supply input VCC-IN pin of load blocks through diode one VD1, the standby power VCC-stb pin of liquid crystal television power supply module connects the MCU control module, connect the power supply input VCC-IN pin of load blocks simultaneously through diode two VD2, the second out-put supply VCC2 pin of liquid crystal television power supply module connects backlight module, and the switch control ON/OFF pin of liquid crystal television power supply module is connected with the general input and output control port GPIO of MCU.
Diode one VD1 of the present utility model and diode two VD2 are Schottky-barrier diode.
The utility model compared with prior art, adopt the schottky diode of two low forward conduction voltages, realize that the LCD TV primary and secondary power switches, the master chip even load module that makes LCD TV is powered by VCC1 when normal pattern, during specific energy saver mode, turn-off VCC1, power by VCC-stb, make power module also be in energy saver mode, improve the security of system for TV set.
Description of drawings
Fig. 1 is the circuit block diagram of prior art.
Fig. 2 is a circuit block diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.Be illustrated in figure 1 as the circuit diagram of prior art, when televisor is in specific low power mode of operation (but not being the lowest power consumption pattern of standby), prior art does not need to show anything at this pattern tv display screen, but certain task processing is being done on the system backstage, this moment, the first out-put supply VCC1 still must export, the switch control ON/OFF of power module will be the ON state, can't make LCD TV under specific pattern, turn-off VCC1, the primary and secondary power that also has that has switches, but circuit complexity, the VCC1 of general LCD TV and the shared transformer of the second out-put supply VCC2 of powering to backlight, therefore when TV not turning off VCC1 during long-term work, mean that VCC1 and VCC2 are simultaneously in output, this is concerning CCFL LCD TV backlight, the input power supply that means its inverter does not have cut-out, this has increased unsafe factor unnecessary, and concerning the LCD TV of LED-backlit, its VCC2 is the high voltage direct current of volt more than 100 especially, as the transformer long-term work of exporting this high pressure, can be more dangerous.
As shown in Figure 2, liquid crystal television power supply switching device shifter of the present utility model, comprise the liquid crystal television power supply module, backlight module, load blocks and MCU control module, the VCC1 pin of described liquid crystal television power supply module connects the voltage out-put supply input VCC-IN pin of load blocks through diode one VD1, the standby power VCC-stb pin of liquid crystal television power supply module connects the MCU control module, connect the VCC-IN pin of load blocks simultaneously through diode two VD2, the VCC2 pin of liquid crystal television power supply module connects backlight module, switch control ON/OFF pin connects the Ctr pin of the general input and output control port GPIO of MCU control module, described diode one VD1 and diode two VD2 are schottky diode (Schottky, claim Schottky-barrier diode again, be called for short SBD).
When the televisor operate as normal, the ON/OFF pin control end of liquid crystal television power supply module is ON, this moment is because of VCC1＞VCC-stb, diode one VD1 conducting, the VCC-IN pin of load blocks is generally 0.3V for the VCC1 pin deducts the conduction voltage drop of diode one VD1 because of conduction voltage drop is very for a short time, the voltage of the VCC-IN pin of load blocks is also greater than the VCC-stb pin, diode two not conductings of VD2, this moment, the VCC1 pin of liquid crystal television power supply module was powered to system load by conducting diode one VD1.
When system is in specific operation mode, the ON/OFF control end of liquid crystal television power supply module can place the OFF state, this moment, VCC1/VCC2 all turn-offed, diode two VD2 conductings, diode one VD1 turn-offs, the VCC-IN pin of load blocks is the diode two VD2 powering loads of the VCC-stb pin of liquid crystal television power supply module by conducting for the VCC-stb pin deducts diode two VD2 forward conduction voltage drops at this moment.
Liquid crystal television power supply switching device shifter of the present utility model, circuit is simple, realizes the part power supply of televisor power cutoff module when aforementioned specific operation mode, has reduced power consumption, improves the security of system for TV set.
Claims (2)
1. liquid crystal television power supply switching device shifter, comprise the liquid crystal television power supply module, backlight module, load blocks and MCU control module, described liquid crystal television power supply module connects backlight module and MCU control module respectively, it is characterized in that: first out-put supply (VCC1) pin of described liquid crystal television power supply module connects power supply input (VCC-IN) pin of load blocks through diode one (VD1), the standby power of liquid crystal television power supply module (VCC-stb) pin connects the MCU control module, connect power supply input (VCC-IN) pin of load blocks simultaneously through diode two (VD2), second out-put supply (VCC2) pin of liquid crystal television power supply module connects backlight module, and switch control (ON/OFF) pin of liquid crystal television power supply module is connected with the general input and output control port (GPIO) of MCU.
2. liquid crystal television power supply switching device shifter according to claim 1 is characterized in that: described diode one (VD1) is a Schottky-barrier diode with diode two (VD2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202055465U CN201532756U (en) | 2009-10-12 | 2009-10-12 | Power supply switch device for LCD TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202055465U CN201532756U (en) | 2009-10-12 | 2009-10-12 | Power supply switch device for LCD TV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201532756U true CN201532756U (en) | 2010-07-21 |
Family
ID=42528157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202055465U Expired - Fee Related CN201532756U (en) | 2009-10-12 | 2009-10-12 | Power supply switch device for LCD TV |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201532756U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523405A (en) * | 2011-12-08 | 2012-06-27 | 青岛海信电器股份有限公司 | Method for controlling power panel voltage, power panel of liquid crystal display television and liquid crystal display television |
| CN102955551A (en) * | 2011-08-19 | 2013-03-06 | 善元科技股份有限公司 | Power supply device |
| CN103873932A (en) * | 2014-03-18 | 2014-06-18 | 深圳市九洲电器有限公司 | Power supply management method of set top box, set top box and remote control unit |
| CN111063296A (en) * | 2020-01-11 | 2020-04-24 | 安徽成业电子科技有限公司 | LED display screen power switch control system |
-
2009
- 2009-10-12 CN CN2009202055465U patent/CN201532756U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955551A (en) * | 2011-08-19 | 2013-03-06 | 善元科技股份有限公司 | Power supply device |
| CN102955551B (en) * | 2011-08-19 | 2016-10-12 | 善元科技股份有限公司 | Power supply device |
| CN102523405A (en) * | 2011-12-08 | 2012-06-27 | 青岛海信电器股份有限公司 | Method for controlling power panel voltage, power panel of liquid crystal display television and liquid crystal display television |
| CN102523405B (en) * | 2011-12-08 | 2014-05-07 | 青岛海信电器股份有限公司 | Method for controlling power panel voltage, power panel of liquid crystal display television and liquid crystal display television |
| CN103873932A (en) * | 2014-03-18 | 2014-06-18 | 深圳市九洲电器有限公司 | Power supply management method of set top box, set top box and remote control unit |
| CN111063296A (en) * | 2020-01-11 | 2020-04-24 | 安徽成业电子科技有限公司 | LED display screen power switch control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201532756U (en) | Power supply switch device for LCD TV | |
| CN103647333B (en) | Visualization low profile photovoltaic intelligent power supply and charging method | |
| TW201426274A (en) | Power supply unit and method of supplying power | |
| CN203674082U (en) | Relay control circuit | |
| CN102866769B (en) | Display terminal | |
| CN103545914A (en) | Dual-path electricity supply circuit with automatic switching function | |
| CN201369471Y (en) | Multi-functional safe energy-saving timing socket | |
| CN202145692U (en) | LED flicker filter circuit | |
| CN105262183A (en) | Power-saving type USB charging structure | |
| CN203366709U (en) | Liquid crystal display screen dormancy control device applied for solar inverter | |
| CN202443412U (en) | Power supply control circuit of computer | |
| CN217087570U (en) | Switch power supply redundant circuit | |
| CN217590352U (en) | Power control circuit, power controller, control circuit and consumer | |
| CN204089722U (en) | A kind of solar power distributes collector-shoe gear | |
| CN206894325U (en) | A kind of control circuit of new low standby power loss | |
| CN102902336B (en) | The power supply link block of mainboard, mainboard and electronic equipment thereof | |
| CN202587188U (en) | Liquid crystal display television (LCD TV) power supply device for integrated multi-voltage output | |
| JP4622044B2 (en) | Liquid crystal display device | |
| CN2838024Y (en) | Switch circuit in device power supply circuit | |
| CN202906569U (en) | Internal and external power-supply switching circuit for electric energy meter | |
| CN202565389U (en) | Low-power-consumption digital television power supply unit | |
| CN202840989U (en) | Power supply circuit | |
| CN202257433U (en) | Computer universal serial bus (USB) port charging control circuit | |
| CN203422622U (en) | Circuit reducing whole machine standby power consumption | |
| CN110429800A (en) | A kind of low pressure drop driver and implementation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100721 Termination date: 20121012 |