CN106100336B - DC voltage converting circuit and display panel with the DC voltage converting circuit - Google Patents
DC voltage converting circuit and display panel with the DC voltage converting circuit Download PDFInfo
- Publication number
- CN106100336B CN106100336B CN201610682288.4A CN201610682288A CN106100336B CN 106100336 B CN106100336 B CN 106100336B CN 201610682288 A CN201610682288 A CN 201610682288A CN 106100336 B CN106100336 B CN 106100336B
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- 238000001514 detection method Methods 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 5
- 230000005669 field effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention provides a kind of DC voltage converting circuit and display panel, DC voltage converting circuit includes current source combination, first voltage-multiplying circuit, second voltage-multiplying circuit, amplifying circuit, detection circuit, subtracter, sequence controller, adjuster, the input terminal of the output end connection amplifying circuit of first voltage-multiplying circuit, the control terminal of current source combination connection amplifying circuit, second voltage-multiplying circuit is connected between the output end and voltage output end of amplifying circuit, detection circuit, which is used to detect the electric current of voltage output end and obtains detection voltage output according to electric current, detects voltage to subtracter, subtracter is used to export the difference of detection voltage and reference voltage to sequence controller, sequence controller is used to send control signal after receiving difference to the adjuster, the adjuster is used for wherein one that the current source according to the control signal behavior combines Current source is connected to the control terminal of the amplifying circuit, to adjust the electric current of the voltage output end.
Description
Technical field
The present invention relates to field of display screen more particularly to a kind of DC voltage converting circuit and there is DC voltage conversion
The display panel of circuit.
Background technique
DC/DC converter is used to be converted to DC voltage the DC voltage of different voltages value, is applied to electricity in large quantities
In sub-device.Existing DC/DC converter is directly connected to load circuit, and the electric current that different load circuits needs is different, existing
DC/DC converter be unable to adjust output electric current and match different load circuits.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention provide it is a kind of it is adjustable output electric current DC voltage converting circuit and
Display panel with the DC voltage converting circuit.
A kind of DC voltage converting circuit, the DC voltage converting circuit include current source combination, the first voltage-multiplying circuit,
Second voltage-multiplying circuit, amplifying circuit, detection circuit, subtracter, sequence controller, adjuster, first voltage-multiplying circuit it is defeated
Outlet connects the input terminal of the amplifying circuit, and the current source combination includes multiple current sources, the current source combination connection
The control terminal of the amplifying circuit, second voltage-multiplying circuit be connected to the amplifying circuit output end and voltage output end it
Between, the voltage output end is used to detect the electric current of the voltage output end simultaneously for connecting load circuit, the detection circuit
Detection voltage is obtained according to the electric current and exports detection voltage to the subtracter, and the subtracter is for exporting detection voltage
The sequence controller is given with the difference of reference voltage, the sequence controller is used to send control letter after receiving the difference
Number give the adjuster, the adjuster be used for according to it is described control signal behavior described in current source combine a wherein current source
It is connected to the control terminal of the amplifying circuit, to adjust the electric current of the voltage output end.
Further, the detection circuit includes photo-coupler, and the photo-coupler includes light emitting diode, photosensitive three pole
Pipe, first resistor, second resistance；The light emitting diode be connected to second voltage-multiplying circuit output end and the voltage it is defeated
Between outlet, the collector of the phototriode is grounded by the first resistor, and the emitter of the phototriode is logical
The second resistance connection power end is crossed, the collector of the phototriode is also connected with comparison circuit to export the detection electricity
It presses to the subtracter.
Further, the subtracter includes normal phase input end, reverse input end, output end, and the normal phase input end connects
The collector of the phototriode is connect, the reverse input end is for receiving the reference voltage, the output of the subtracter
End connects the sequence controller.
Further, first voltage-multiplying circuit includes first input end and the second input terminal, and the first input end is logical
Cross the anode of resistance connection first diode, the cathode of the first diode connects the anode of the second diode, and described second
The cathode of diode connects the input terminal of the amplifying circuit, and second input terminal passes through the series connection institute of resistance and capacitor
The cathode of first diode is stated, the first input end is for receiving DC voltage, and second input terminal is for receiving pulse
Signal.
Further, the amplifying circuit includes PNP type triode, described in the emitter conduct of the PNP type triode
The input terminal of amplifying circuit, output end of the collector of the PNP type triode as the amplifying circuit, the positive-negative-positive three
Control terminal of the base stage of pole pipe as the amplifying circuit.
Further, second voltage-multiplying circuit includes third input terminal and the 4th input terminal, and the third input terminal is logical
The anode of resistance connection third diode is crossed, the third input terminal connects the collector, the cathode of the third diode
The anode of the 4th diode is connected, the cathode of the 4th diode connects the input terminal of the detection circuit, and the described 4th is defeated
Enter end by the cathode of the series connection third diode of resistance and capacitor, the 4th input terminal is for receiving pulse letter
Number.
Further, it includes two level signals, institute that the sequence controller, which is exported to the control signal of the adjuster,
Stating current source combination includes four current sources, and the adjuster is used for the electricity according to the lever selection of described two level signals
A current source in the combination of stream source.
Further, each current source includes current source ontology, and the current source ontology is grounded by switch element, described
Adjuster be used for according to the level of described two level signals send four switching signals to four switch elements so that its
In a switching elements conductive and select the current source ontology of the corresponding switch element be connected to be connected to the control terminal of the amplifying circuit.
A kind of display panel, the display panel include above-mentioned DC voltage converting circuit.
Beneficial effects of the present invention: the DC voltage converting circuit includes current source combination, amplifying circuit, detection electricity
Road, subtracter, sequence controller, adjuster, the electric current and root of the detection circuit and subtracter detection voltage output end
Detection voltage is obtained according to the electric current and exports the difference of detection voltage and reference voltage to the sequence controller, the timing
Controller is used to send control signal after receiving the difference to the adjuster, and the adjuster is used for according to the control
A wherein current source for the combination of current source described in signal behavior is connected to the control terminal of the amplifying circuit, defeated to adjust the voltage
The electric current of outlet.The DC voltage converting circuit selects corresponding electric current by detecting the size of current of voltage output end
Source, to play the role of adjusting the electric current of voltage output end.
Detailed description of the invention
Fig. 1 is that the invention shows the system block diagrams of the DC voltage converting circuit better embodiment of panel.
Fig. 2 is that the invention shows the circuit connection diagrams of the DC voltage converting circuit better embodiment of panel.
Specific embodiment
In the following, will be described in detail in conjunction with attached drawing to various embodiments of the present invention.
Fig. 1 and Fig. 2 is please referred to, the DC voltage converting circuit better embodiment the invention shows panel includes current source
Combine the 73, first voltage-multiplying circuit 101, the second voltage-multiplying circuit 105, amplifying circuit 103, detection circuit 31, subtracter 33, timing control
Device 50 processed, adjuster 71.In the present embodiment, the current source combination 73 and the adjuster 71 are integrated in an integrated chip
In.
As shown in Fig. 2, the amplifying circuit 105 includes PNP type triode, the emitter conduct of the PNP type triode
The input terminal of the amplifying circuit, output end of the collector of the PNP type triode as the amplifying circuit, the PNP
Control terminal of the base stage of type triode as the amplifying circuit.
First voltage-multiplying circuit 101 includes first input end and the second input terminal, and the first input end is for receiving
DC voltage VAA, second input terminal are used for return pulse signal LX1, and the first input end VAA is connected by resistance R3
The anode connection of the anode of first diode D1, the first diode D1 is grounded by the capacitor C1.One or two pole
The cathode of pipe D1 connects the anode of the second diode D2, and the cathode of the second diode D2 connects the amplifying circuit 105
Input terminal, the second input terminal of first voltage-multiplying circuit 101 pass through the series connection the described 1st of resistance R4 and capacitor C2
The cathode of pole pipe D1.
Second voltage-multiplying circuit 105 includes third input terminal and the 4th input terminal, and the third input terminal passes through resistance
The anode of R6 connection third diode D3, the third input terminal connect the collector, the cathode of the third diode D3
The anode of the 4th diode D4 is connected, the cathode of the 4th diode D4 connects the input terminal of the detection circuit 31, described
Cathode of 4th input terminal by the series connection third diode D3 of resistance R5 and capacitor C4, the 4th input terminal use
In return pulse signal LX1.
The detection circuit 31 includes photoelectrical coupler, resistance R1, resistance R2, and the photoelectrical coupler includes light-emitting diodes
Pipe, phototriode.
The anode of the light emitting diode connects the cathode of the 4th diode D4, the cathode of the light emitting diode connects
The voltage output end VGH is met, the collector of the phototriode is grounded by the resistance R1, the phototriode
Emitter is also connected with the subtracter 33 by the resistance R2 connection power end Vcc, the collector of the phototriode
Normal phase input end.The light emitting diode is used to be shone according to the size of the voltage output end VGH, the phototriode
312 for generating corresponding couple current according to the luminance of the light emitting diode 311, the phototriode 312
Collector generates the normal phase input end of detection voltage output to the subtracter 33.
The inverting input terminal of the subtracter 33 is for receiving reference voltage Vref, the output end connection of the subtracter 33
The sequence controller 50.The sequence controller 50 connects the adjuster 71.
The current source combination 73 includes multiple current sources, and in the present embodiment, the current source group includes 4 electric currents
Source.4 current sources are grounded by switch element respectively.In the present embodiment, 4 current sources pass through 4 field-effects respectively
Pipe Q1, Q2, Q3, Q4 ground connection.The grid of described field-effect tube Q1, Q2, Q3, Q4 as the switch element control terminal and with institute
State the connection of adjuster 71.
In use, the subtracter 33 exports the detection electricity after receiving the detection voltage from the detection circuit 31
Pressure and the difference of reference voltage give the sequence controller 50, and the sequence controller 50 exports control signal according to the difference
To the adjuster 71, in the present embodiment, the control signal includes two level signals.The adjuster 71 is according to described
Control signal export a group selection signal selected current source combination to described 4 field-effect tube Q1, Q2, Q3, Q4 its
In a current source be connected to the control terminal of the amplifying circuit 105, so as to adjust the electric current of the voltage output end.For example,
The sequence controller 50 exports two level signals B0, B1 according to the difference and gives the adjuster 71, the adjuster 71
According to described two level signal B0, the level of B1 is different, exports 4 selection signals A1, A2, A3, A4 to 4 field-effects
Pipe Q1, Q2, Q3, Q4,4 selection signals A1, A2, A3, A4 one of them for high level signal select corresponding current source.
Although the present invention has shown and described referring to specific embodiment, it should be appreciated by those skilled in the art that:
In the case where not departing from the spirit and scope of the present invention being defined by the claims and their equivalents, can carry out herein form and
Various change in details.
Claims (9)
1. a kind of DC voltage converting circuit, which is characterized in that the DC voltage converting circuit includes current source combination, first
Voltage-multiplying circuit, the second voltage-multiplying circuit, amplifying circuit, detection circuit, subtracter, sequence controller, adjuster, first multiplication of voltage
The output end of circuit connects the input terminal of the amplifying circuit, and the current source combination includes multiple current sources, the current source
Combination connects the control terminal of the amplifying circuit, and second voltage-multiplying circuit is connected to the output end and voltage of the amplifying circuit
Between output end, the voltage output end is for connecting load circuit, and the detection circuit is for detecting the voltage output end
Electric current and detection voltage is obtained according to the electric current and exports detection voltage to the subtracter, the subtracter is for exporting
The difference of voltage and reference voltage is detected to the sequence controller, the sequence controller after receiving the difference for sending out
Send control signal to the adjuster, the adjuster combines wherein for the current source according to the control signal behavior
One current source is connected to the control terminal of the amplifying circuit, to adjust the electric current of the voltage output end.
2. DC voltage converting circuit according to claim 1, which is characterized in that the detection circuit includes optical coupling
Device, the photo-coupler include light emitting diode, phototriode, first resistor, second resistance；The light emitting diode connection
Between the output end and the voltage output end of second voltage-multiplying circuit, the collector of the phototriode passes through described
The emitter of first resistor ground connection, the phototriode connects power end, the phototriode by the second resistance
Collector be also connected with comparison circuit to export the detection voltage to the subtracter.
3. DC voltage converting circuit according to claim 2, which is characterized in that the subtracter includes positive input
End, reverse input end, output end, the normal phase input end connect the collector of the phototriode, the reverse input end
For receiving the reference voltage, the output end of the subtracter connects the sequence controller.
4. DC voltage converting circuit according to claim 1, which is characterized in that first voltage-multiplying circuit includes first
Input terminal and the second input terminal, the first input end connect the anode of first diode, the first diode by resistance
Cathode connect the second diode anode, the cathode of second diode connects the input terminal of the amplifying circuit, described
Second input terminal is by the cathode of the series connection first diode of resistance and capacitor, and the first input end is for receiving
DC voltage, second input terminal are used for return pulse signal.
5. DC voltage converting circuit according to claim 4, which is characterized in that the amplifying circuit includes positive-negative-positive three
Pole pipe, input terminal of the emitter of the PNP type triode as the amplifying circuit, the collector of the PNP type triode
As the output end of the amplifying circuit, control terminal of the base stage of the PNP type triode as the amplifying circuit.
6. DC voltage converting circuit according to claim 5, which is characterized in that second voltage-multiplying circuit includes third
Input terminal and the 4th input terminal, the third input terminal connect the anode of third diode, the third input terminal by resistance
The collector is connected, the cathode of the third diode connects the anode of the 4th diode, the cathode of the 4th diode
The input terminal of the detection circuit is connected, the 4th input terminal passes through the series connection third diode of resistance and capacitor
Cathode, the 4th input terminal be used for return pulse signal.
7. DC voltage converting circuit according to claim 1, which is characterized in that the sequence controller is exported to described
The control signal of adjuster includes two level signals, and the current source combination includes four current sources, and the adjuster is used for
According to the current source in the combination of current source described in the lever selection of described two level signals.
8. DC voltage converting circuit according to claim 7, which is characterized in that each current source includes current source sheet
Body, the current source ontology are grounded by switch element, and the adjuster is used to be sent out according to the level of described two level signals
Send four switching signals to four switch elements so that wherein a switching elements conductive and select the corresponding switch member be connected
The current source ontology of part is connected to the control terminal of the amplifying circuit.
9. a kind of display panel, which is characterized in that the display panel includes that the DC voltage of any one of claim 1 to 8 turns
Change circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610682288.4A CN106100336B (en) | 2016-08-17 | 2016-08-17 | DC voltage converting circuit and display panel with the DC voltage converting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610682288.4A CN106100336B (en) | 2016-08-17 | 2016-08-17 | DC voltage converting circuit and display panel with the DC voltage converting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106100336A CN106100336A (en) | 2016-11-09 |
| CN106100336B true CN106100336B (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610682288.4A Active CN106100336B (en) | 2016-08-17 | 2016-08-17 | DC voltage converting circuit and display panel with the DC voltage converting circuit |
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| CN (1) | CN106100336B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109448621B (en) * | 2018-10-19 | 2021-01-15 | 深圳市华星光电技术有限公司 | Drive circuit and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005528875A (en) * | 2002-06-04 | 2005-09-22 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | DC-DC converter |
| DE10334598A1 (en) * | 2003-07-29 | 2005-02-24 | Infineon Technologies Ag | Multi-channel DC-DC converter |
| US6933874B2 (en) * | 2003-11-13 | 2005-08-23 | Texas Instruments Incorporated | Applying desired voltage at a node |
| CN201854186U (en) * | 2010-08-16 | 2011-06-01 | 雅达电子有限公司 | Modular DC-DC (Direct Current-Direct Current) converter system and control device thereof |
| CN102255505B (en) * | 2011-07-29 | 2015-03-18 | 索尔思光电（成都）有限公司 | APD (avalanche photo diode) voltage control circuit and method |
| CN204145330U (en) * | 2014-09-30 | 2015-02-04 | 西安电子工程研究所 | A kind of high-pressure electrostatic pulse power |
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