CN201345612Y - Power supply circuit of display - Google Patents
Power supply circuit of display Download PDFInfo
- Publication number
- CN201345612Y CN201345612Y CNU2009201296182U CN200920129618U CN201345612Y CN 201345612 Y CN201345612 Y CN 201345612Y CN U2009201296182 U CNU2009201296182 U CN U2009201296182U CN 200920129618 U CN200920129618 U CN 200920129618U CN 201345612 Y CN201345612 Y CN 201345612Y
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- voltage
- display
- divider resistance
- output
- switching tube
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- 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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model is applicable to the field of power supplies and provides a power supply circuit of a display. The power supply circuit of the display comprises a transformer and further comprises a voltage control module and a power conversion module, wherein, the input terminal of the voltage control module is connected to the output terminal of the transformer and is used for controlling the switching between the starting voltage and the standby voltage of the display; and the input terminal of the power conversion module is connected to the output terminal of the voltage control module, the output terminal of the power conversion module is connected to the power end of a main circuit board of the display, and the voltage output by the voltage control module is transformed into the standby voltage of the display. The power supply circuit of the display, provided by the utility model, adopts the voltage control module to control the switching between the starting voltage and the standby voltage of the display and meanwhile, adopts the power conversion module to transform the voltage output by the transformer into standby voltage; and the power supply inputs power consumption below 0.15 W under the standby condition, the power consumption is reduced and the energy is saved.
Description
Technical field
The utility model belongs to field of power supplies, relates in particular to a kind of display power supply circuit.
Background technology
At present, a lot of displays can both provide shutdown and idle function, yet shutdown and stand-by power consumption are higher, do not meet national standard (stand-by power consumption is that 0.5W is following), cause the energy waste phenomenon.
The utility model content
The display power supply circuit that provides a kind of stand-by power consumption low is provided the purpose of this utility model.
The utility model is achieved in that a kind of display power supply circuit, comprises transformer, and described display power supply circuit also comprises:
Voltage control module, its input is connected to the output of described transformer, the switching between control display starting voltage and the display standby voltage;
Power transfer module, its input is connected to the output of described voltage control module, and the output of power transfer module is connected to the power end of display main circuit board, and the voltage transitions that voltage control module is exported is a display standby supply power voltage.
The display power supply circuit that the utility model embodiment provides adopts the switching between voltage control module control display starting voltage and the display standby voltage, and adopting power transfer module simultaneously is the standby supply power voltage with the voltage transitions of voltage control module output; Make power supply under holding state, import power consumption below 0.15W, reduced power consumption, saved the energy.
Description of drawings
Fig. 1 is the structure chart of the display power supply circuit that provides of the utility model embodiment;
Fig. 2 is the circuit diagram of the power transfer module that provides of the utility model embodiment;
Fig. 3 is the circuit diagram of the voltage control module that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The display power supply circuit that the utility model embodiment provides adopts the switching between voltage control module control display starting voltage and the display standby voltage, and adopting power transfer module simultaneously is the standby supply power voltage with the voltage transitions of voltage control module output; Reduce power consumption, saved the energy.
Fig. 1 shows the structure of the display power supply circuit that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment, and details are as follows.
The display power supply circuit that the utility model embodiment provides comprises transformer 1, power transfer module 2, voltage control module 3, wherein, the input of power transfer module 2 is connected to the output of voltage control module 3, the output of power transfer module 2 is connected to the power end of display main circuit board, and the voltage transitions that voltage control module is exported is the standby supply power voltage; Voltage control module 3 is connected between the input of the output of transformer 1 and power transfer module 2, the switching between the voltage when voltage during the control display starting and display standby.
The circuit of power transfer module 2 for convenience of explanation, only shows the part relevant with the utility model embodiment as shown in Figure 2, and details are as follows.
As an embodiment of the present utility model, power transfer module 2 also comprises: the first semifixed resistor R5, the second semifixed resistor R6 and isolation capacitance C; Wherein, the end of the first semifixed resistor R5 is connected to the output of voltage control module 3, and the other end of the first semifixed resistor R5 is connected to the output of the first voltage-regulation unit 23; The end of the second semifixed resistor R6 is connected to the output of voltage control module 3, and the other end of the second semifixed resistor R6 is connected to the control end of first switching tube 21; The end of isolation capacitance C is connected to the output of the first voltage-regulation unit 23, and the other end of isolation capacitance C is connected to the control end of the first voltage-regulation unit 23.
In the utility model embodiment, the first voltage-regulation unit 23 is the adjustable shunting a reference source of three ends chip U1; First switching tube 21 is PMOS pipe Q1; Second switch pipe 22 is NMOS pipe Q2.
As an embodiment of the present utility model, power transfer module 2 also comprises resistance R 4, is connected between the control end and ground of second switch pipe 22.
In the utility model embodiment, power transfer module 2 can (3.3V～5V) be converted to the output voltage V out of 3.3V, keeps the operate as normal of display chip group with input voltage vin; After the first voltage-regulation unit U1 shunt feedback, the voltage all-the-time stable of control end is at 2.5V, and being connected on the electric current that flows through in the resistance between control end and the ground so is constant current; When the resistance of the first divider resistance R1 and the second divider resistance R2 was determined, both introduced feedback to the dividing potential drop of output voltage V out, if output voltage V out increases, feedback quantity increases, and the shunting of U1 also just increases, from and cause output voltage V out to descend.The negative-feedback circuit of this degree of depth is inevitable stable when the voltage of U1 control end equals reference voltage, at this moment output voltage V out=(1+R1/R2) Vref; By mating the resistance of the first divider resistance R1 and the second divider resistance R2, can obtain output voltage V out is 3.3V.
The circuit of voltage control module 3 for convenience of explanation, only shows the part relevant with the utility model embodiment as shown in Figure 3, and details are as follows.
As an embodiment of the present utility model, the 3rd switching tube 31 is positive-negative-positive triode Q6; The second voltage-regulation unit 32 is the adjustable shunting fiducial chip of three ends U5.
As an embodiment of the present utility model, voltage-stabilizing device 34 comprises optical coupler unit U3 and the resistance R S8 that is connected in parallel with optical coupler unit U3; Wherein, optical coupler unit U3 is connected between the input of the second voltage-regulation unit 32 and power transfer module 2.
In the utility model embodiment, realize switching between 5V and the 3.5V in the time of can controlling display starting and standby according to switch controlling signal ON/OFF; When display during at open state, switch controlling signal ON/OFF is a high level, the 3rd switching tube Q6 conducting, the control end of the second voltage-regulation unit U5 and the equivalent resistance between the ground are the parallel resistance (supposing that resistance is that substitutional resistance after RS11, RS14, the RS9 parallel connection is RS01) of RS11, RS14, RS9, the voltage of A point output (+5V) by resistance R S7 and RS01 decision.When display during at standby or off-mode, switch controlling signal ON/OFF is a low level, the 3rd switching tube Q6 ends, the control end of the second voltage-regulation unit U5 and the equivalent resistance between the ground are the parallel resistance (supposing that the equivalent resistance after resistance R S11, the RS14 parallel connection is RS02) of resistance R S11 and resistance R S14, and the output voltage that A is ordered is by resistance R S7 and RS02 decision; At this moment, the output voltage that A is ordered drops to 3.5V, and power consumption also decreases.
In the utility model embodiment, voltage control module 3 also comprises: filter unit 33, be connected between the other end of the output of the second voltage-regulation unit 32 and the 4th divider resistance RS9, wherein, filter unit 33 further comprises: resistance R S10 and capacitor C S10, CS11; The end of resistance R S10 is connected with the output of the second voltage-regulation unit 32, and the other end of resistance R S10 is connected with the 3rd divider resistance RS7 by capacitor C S10; The end of capacitor C S11 is connected with the output of the second voltage-regulation unit 32, and the other end of capacitor C S11 is connected with the 3rd divider resistance RS7.In the utility model embodiment, voltage control module 3 also comprises: pull-up resistor RS16 is connected between the output of the control end of the 3rd switching tube 31 and voltage control module 2.As an embodiment of the present utility model, voltage control module 3 also comprises: resistance R S5 and resistance R S17; Wherein the control end of the 3rd switching tube 31 is connected with switch controlling signal ON/OFF by series resistance RS17, and photoelectrical coupler unit 34 is connected to the output of transformer 1 by resistance R S5.
In order to illustrate further the utility model, it is as follows now in conjunction with Fig. 2, Fig. 3 in detail the operation principle of the display power supply circuit that the utility model embodiment provides to be described in detail: transformer 1 is converted to the supply power voltage output of 5V with external power source, and power transfer module 2 is the display standby supply power voltage of 3.3V with the 5V voltage transitions; Switching between voltage control module 3 control display starting voltage 5V and the display standby voltage 3.5V; When display during at open state, switch controlling signal ON/OFF is a high level, the 3rd switching tube Q6 conducting, the control end of the second voltage-regulation unit U5 and the equivalent resistance between the ground are the parallel resistance (supposing that resistance is that substitutional resistance after RS11, RS14, the RS9 parallel connection is RS01) of RS11, RS14, RS9, the voltage of A point output (+5V) by resistance R S7 and RS01 decision.When display during at standby or off-mode, switch controlling signal ON/OFF is a low level, the 3rd switching tube Q6 ends, the control end of the second voltage-regulation unit U5 and the equivalent resistance between the ground are the parallel resistance (supposing that the equivalent resistance after resistance R S11, the RS14 parallel connection is RS02) of resistance R S11 and resistance R S14, and the output voltage that A is ordered is by resistance R S7 and RS02 decision; At this moment, the output voltage that A is ordered drops to 3.5V, and power consumption also decreases; The stand-by power consumption of display can be reduced to below the 0.15W through detecting, be met national standard, power consumption number is far below the standard of similar enterprise.
The display power supply circuit that the utility model embodiment provides adopts the switching between voltage control module control display starting voltage and the display standby voltage, and adopting power transfer module simultaneously is the standby supply power voltage with the voltage transitions of transformer output; Make power supply under holding state, import power consumption below 0.15W, reduced power consumption, saved the energy.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1, a kind of display power supply circuit comprises transformer, it is characterized in that, described display power supply circuit also comprises:
Voltage control module, its input is connected to the output of described transformer, the switching between control display starting voltage and the display standby voltage;
Power transfer module, its input is connected to the output of described voltage control module, and the output of power transfer module is connected to the power end of display main circuit board, and the voltage transitions that voltage control module is exported is a display standby supply power voltage.
2, display power supply circuit as claimed in claim 1 is characterized in that, described power transfer module further comprises:
First switching tube, second switch pipe, the first voltage-regulation unit, first divider resistance and second divider resistance;
First end of described first switching tube is connected to the output of described voltage control module, second end of described first switching tube is connected to the power end of described display main circuit board, and described first control end of switching tube is connected to first end of described second switch pipe;
The second end ground connection of described second switch pipe, the control end of described second switch pipe is connected to the output of the described first voltage-regulation unit by a resistance;
The input end grounding of the described first voltage-regulation unit, the control end of the described first voltage-regulation unit is connected to second end of described first switching tube by described first divider resistance, and the control end of the described first voltage-regulation unit is also by the described second divider resistance ground connection.
3, display power supply circuit as claimed in claim 2 is characterized in that, described power transfer module also comprises:
First semifixed resistor, second semifixed resistor and isolation capacitance;
One end of described first semifixed resistor is connected to the output of described voltage control module, and the other end of described first semifixed resistor is connected to the output of the described first voltage-regulation unit;
One end of described second semifixed resistor is connected to the output of described voltage control module, and the other end of described second semifixed resistor is connected to described first control end of switching tube;
One end of described isolation capacitance is connected to the output of the described first voltage-regulation unit, and the other end of described isolation capacitance is connected to the control end of the described first voltage-regulation unit.
4, display power supply circuit as claimed in claim 2 is characterized in that, the described first voltage-regulation unit is the adjustable shunting fiducial chips of three ends.
5, display power supply circuit as claimed in claim 2 is characterized in that, described first switching tube is the PMOS pipe.
6, display power supply circuit as claimed in claim 2 is characterized in that, described second switch pipe is the NMOS pipe.
7, display power supply circuit as claimed in claim 1 is characterized in that, described voltage control module further comprises:
The 3rd switching tube, the 3rd divider resistance, the 4th divider resistance, the 5th divider resistance, the 6th divider resistance and the second voltage-regulation unit;
Described the 3rd control end of switching tube connects switch controlling signal, and first end of described the 3rd switching tube is connected to an end of described the 4th divider resistance, the second end ground connection of described the 3rd switching tube;
The other end of described the 4th divider resistance is connected to the output of described transformer by described the 3rd divider resistance;
One end of described the 5th divider resistance is connected to the other end of described the 4th divider resistance, and the other end of described the 5th divider resistance is connected to second end and the ground connection of described the 3rd switching tube;
Described the 6th divider resistance and described the 5th divider resistance are connected in parallel;
The output of the described second voltage-regulation unit is connected to the input of described power transfer module successively by voltage-stabilizing device and inductance, the input end grounding of the described second voltage-regulation unit, the control end of the described second voltage-regulation unit is connected to the other end of described the 4th divider resistance.
8, display power supply circuit as claimed in claim 7 is characterized in that, described the 3rd switching tube is the positive-negative-positive triode.
9, display power supply circuit as claimed in claim 7 is characterized in that, described voltage-stabilizing device comprises optical coupler unit and the resistance that is connected in parallel with described optical coupler unit; Described optical coupler unit is connected between the input of described second voltage-regulation unit and described power transfer module.
10, display power supply circuit as claimed in claim 7 is characterized in that, described voltage control module also comprises:
Pull-up resistor is connected between the output of described the 3rd control end of switching tube and described transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201296182U CN201345612Y (en) | 2009-01-19 | 2009-01-19 | Power supply circuit of display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201296182U CN201345612Y (en) | 2009-01-19 | 2009-01-19 | Power supply circuit of display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201345612Y true CN201345612Y (en) | 2009-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201296182U Expired - Fee Related CN201345612Y (en) | 2009-01-19 | 2009-01-19 | Power supply circuit of display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201345612Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871211A (en) * | 2016-05-20 | 2016-08-17 | 南京超闪通讯科技有限公司 | External power supply switching circuit on chip and application |
| CN112713753A (en) * | 2020-12-31 | 2021-04-27 | 深圳市世纪联合创新科技有限公司 | Circuit and method for reducing standby and shutdown power of display |
-
2009
- 2009-01-19 CN CNU2009201296182U patent/CN201345612Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871211A (en) * | 2016-05-20 | 2016-08-17 | 南京超闪通讯科技有限公司 | External power supply switching circuit on chip and application |
| CN112713753A (en) * | 2020-12-31 | 2021-04-27 | 深圳市世纪联合创新科技有限公司 | Circuit and method for reducing standby and shutdown power of display |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangxi the Great Wall Computer Co., Ltd. Assignor: China Changcheng Computer Shenzhen Co., Ltd. Contract record no.: 2010440020134 Denomination of utility model: Power supply circuit of display Granted publication date: 20091111 License type: Common License Record date: 20100816 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangxi the Great Wall Computer Co., Ltd. Assignor: China Changcheng Computer Shenzhen Co., Ltd. Contract record no.: 2010440020210 Denomination of utility model: Power supply circuit of display Granted publication date: 20091111 License type: Exclusive License Record date: 20101013 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091111 Termination date: 20130119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangxi the Great Wall Computer Co., Ltd. Assignor: China Changcheng Computer Shenzhen Co., Ltd. Contract record no.: 2010440020134 Denomination of utility model: Power supply circuit of display Granted publication date: 20091111 License type: Common License Record date: 20100816 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |