CN205993001U - A kind of light adjusting circuit of compatible multiple dimming modes and display device - Google Patents
A kind of light adjusting circuit of compatible multiple dimming modes and display device Download PDFInfo
- Publication number
- CN205993001U CN205993001U CN201620957074.9U CN201620957074U CN205993001U CN 205993001 U CN205993001 U CN 205993001U CN 201620957074 U CN201620957074 U CN 201620957074U CN 205993001 U CN205993001 U CN 205993001U
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- switching tube
- resistance
- audion
- switch pipe
- adjusting circuit
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Abstract
This utility model belongs to display control circuit technical field, the light adjusting circuit of more particularly, to a kind of compatible multiple dimming modes and display device.In this utility model embodiment, the light adjusting circuit that this utility model embodiment adopts increases the compatible factory of peripheral circuit multiple dimming mode, greatly reducing PCBA assembly, minimizing need not stock, facilitate factory to get the raw materials ready.Improve production efficiency and the maintenance efficiency of light adjusting circuit.
Description
Technical field
This utility model belongs to display control circuit technical field, the light modulation of more particularly, to a kind of compatible multiple dimming modes
Circuit and display device.
Background technology
One block of constant-current driving plate all can be had to light lamp bar use in liquid crystal display and TV at present, circuit design principle is exactly
Simple BOOST constant-current circuit, but due to whole electrical-mechanical performance requirement, usual software has two kinds of dimming modes, and that is, PWM adjusts
Light is dimmed with DC.Hardware also has the scheme of compatible both software light modulation at present, but current way is application two constant current plate
Item number, to match both light modulations, thus can increase PCBA assembly item number, and factory gets the raw materials ready and also bothers it is easy to constant current plate causes
Stock, often burns wrong software in factory, and such as constant current plate is DC light modulation, but software burns till PWM light modulation, and now whole machine is
Point does not work.This problem will go for reason and can allow a lot of manpower of expense and material resources.The big heavy discount to company's production efficiency.Mesh after sale
Before be also, after keeping in repair new board, also to need again burned software, such as burn mistake and also can significantly waste maintenance efficiency.
Therefore, existing light adjusting circuit there is a problem of reducing production efficiency and maintenance efficiency.
Utility model content
The purpose of this utility model embodiment is to provide a kind of light adjusting circuit of compatible multiple dimming modes and display to set
For it is intended to solve the problems, such as that present light adjusting circuit exists to reduce production efficiency and maintenance efficiency.
This utility model embodiment is achieved in that a kind of light adjusting circuit of compatible multiple dimming modes, described compatibility
The light adjusting circuit of multiple dimming modes includes：
Resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, resistance
R29, resistance R30, resistance R31, electric capacity C1, electric capacity C2, electric capacity C3, first switch pipe, second switch pipe, the 3rd switching tube,
Four switching tubes, the 5th switching tube and LED drive chip U1；
The first end of described resistance R21 is dim signal input, and described resistance R31 is connected to described dim signal input
Between end and the PWM dim signal input DIM of LED drive chip U1, the second described first switch of termination of described resistance R21
The control end of pipe, the hot end of described first switch pipe connects the control end of described 3rd switching tube by resistance R24, and described
The cold end ground connection of one switching tube, described resistance R22 is connected between control end and the cold end of described first switch pipe,
The control end of described 3rd switching tube connects the hot end of described 3rd switching tube by resistance R23, described 3rd switching tube
Hot end is grounded by electric capacity C2, and the cold end of described 3rd switching tube is grounded by electric capacity C1, described 5th switching tube
Control end connect the cold end of described 3rd switching tube by resistance R29, described resistance R30 is connected to described 5th switching tube
Control end and ground between, the cold end of described 5th switching tube ground connection, the high potential termination of described 5th switching tube is described
The DC dim signal input BF/DMO of LED drive chip U1, described electric capacity C3 are connected to described DC dim signal input BF/
Between DMO and ground, described resistance R25 is connected between described dim signal input and the control end of the 4th switching tube, described
The cold end ground connection of the 4th switching tube, described resistance R26 is connected between control end and the ground of the 4th switching tube, and the described 4th
The high potential of switching tube terminates the control end of described second switch pipe, and the hot end of described second switch pipe passes through described resistance
R28 connects DC source, and described resistance R27 is connected between control end and the hot end of second switch pipe, described second switch
The cold end of pipe is grounded by electric capacity C2.
The another object of this utility model embodiment is to provide a kind of display device, and described display device includes as above-mentioned
The multiple dimming mode of compatibility light adjusting circuit.
In this utility model embodiment, the light adjusting circuit increase peripheral circuit that this utility model embodiment adopts is compatible
The multiple dimming mode of factory, greatly reducing PCBA assembly, minimizing need not stock, facilitate factory to get the raw materials ready.Improve light modulation
The production efficiency of circuit and maintenance efficiency.
Brief description
Fig. 1 is the structure chart of the light adjusting circuit of the multiple dimming mode of compatibility that this utility model embodiment provides.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
Fig. 1 shows the structure of the light adjusting circuit of the multiple dimming mode of compatibility that this utility model embodiment provides, in order to
It is easy to illustrate, illustrate only the part related to this utility model embodiment.
A kind of light adjusting circuit of compatible multiple dimming modes, the light adjusting circuit of described compatible multiple dimming modes includes：
Resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, resistance
R29, resistance R30, resistance R31, electric capacity C1, electric capacity C2, electric capacity C3, first switch pipe 1, second switch pipe 2, the 3rd switching tube 3,
4th switching tube 4, the 5th switching tube 5 and LED drive chip U1；
The first end of described resistance R21 is dim signal input, and described resistance R31 is connected to described dim signal input
Between end and the PWM dim signal input DIM of LED drive chip U1, the second described first switch of termination of described resistance R21
The control end of pipe 1, the hot end of described first switch pipe 1 meets the control end of described 3rd switching tube 3, institute by resistance R24
State the cold end ground connection of first switch pipe 1, described resistance R22 is connected to control end and the electronegative potential of described first switch pipe 1
Between end, the control end of described 3rd switching tube 3 connects the hot end of described 3rd switching tube 3 by resistance R23, and the described 3rd
The hot end of switching tube 3 is grounded by electric capacity C2, and the cold end of described 3rd switching tube 3 is grounded by electric capacity C1, described
The control end of the 5th switching tube 5 connects the cold end of described 3rd switching tube 3 by resistance R29, and described resistance R30 is connected to institute
State between control end and the ground of the 5th switching tube 5, the cold end ground connection of described 5th switching tube 5, described 5th switching tube 5
High potential terminates the DC dim signal input BF/DMO of described LED drive chip U1, and described electric capacity C3 is connected to described DC and adjusts
Between optical signal input BF/DMO and ground, described resistance R25 is connected to described dim signal input and the 4th switching tube 4
Between control end, the cold end ground connection of described 4th switching tube 4, described resistance R26 is connected to the control end of the 4th switching tube 4
And ground between, the high potential of described 4th switching tube 4 terminates the control end of described second switch pipe 2, described second switch pipe 2
Hot end connects DC source by described resistance R28, and described resistance R27 is connected to control end and the height electricity of second switch pipe 2
Between the end of position, the cold end of described second switch pipe 2 is grounded by electric capacity C2.
As this utility model one embodiment, described first switch pipe 1 adopts audion Q1, the base stage of described audion Q1
For the control end of described first switch pipe 1, the hot end of the extremely described first switch pipe 1 of current collection of described audion Q1, institute
State the cold end of the extremely described first switch pipe 1 of transmitting of audion Q1.
As this utility model one embodiment, described second switch pipe 2 adopts audion Q2, the base stage of described audion Q2
For the control end of described second switch pipe 2, the hot end of the extremely described second switch pipe 2 of current collection of described audion Q2, institute
State the cold end of the extremely described second switch pipe 2 of transmitting of audion Q2.
As this utility model one embodiment, described 3rd switching tube 3 adopts audion Q3, the base stage of described audion Q3
For the control end of described 3rd switching tube 3, the hot end of extremely described 3rd switching tube 3 of transmitting of described audion Q3, institute
State the cold end of extremely described 3rd switching tube 3 of current collection of audion Q3.
As this utility model one embodiment, described 4th switching tube 4 adopts audion Q4, the base stage of described audion Q4
For the control end of described 4th switching tube 4, the hot end of extremely described 4th switching tube 4 of current collection of described audion Q4, institute
State the cold end of extremely described 4th switching tube 4 of transmitting of audion Q4.
As this utility model one embodiment, described 5th switching tube 5 adopts audion Q5, the base stage of described audion Q5
For the control end of described 5th switching tube 5, the hot end of extremely described 5th switching tube 5 of current collection of described audion Q5, institute
State the cold end of extremely described 5th switching tube 5 of transmitting of audion Q5.
A kind of display device of this utility model embodiment, described display device includes the multiple dimming mode of above-mentioned compatibility
Light adjusting circuit.
The operation principle of the light adjusting circuit of compatible multiple dimming modes is：
When the input of PWM square-wave signal, reach the PWM dim signal input DIM of LED drive chip U1 through resistance R31,
The high threshold values of the audion Q1 number of winning the confidence, the low valve valve of the audion Q4 number of winning the confidence, high threshold values through resistance R21, R22, audion Q1,
Q1 turns on, and R24 current potential is pulled low to low level, now Q3 conducting, and low valve valve signal is through resistance R25, R26 to audion Q4, Q4
Cut-off, 12V passes through resistance R28, R27 to Q2 base stage, and Q2 turns on, and current potential flows to electric capacity C2, charges to C2, and current potential flows to Q3 current collection
Pole, Q3 conducting through electric capacity C1, becomes high potential signal (now signal is not also pure direct current signal) pure after being filtered by C1
Direct current signal, high potential turns on through R29 to Q5 base stage, Q5, and Q5 colelctor electrode connects the DC dim signal input of LED drive chip U1
End BF/DMO, drags down DC dim signal input BF/DMO over the ground after conducting, now LED drive chip U1 mode of operation is exactly
PWM light-modulating mode.
When DC direct current signal high level or low level come in (because DC light modulation inside is divided just dimming dimming) with negative again, electricity
Holding on C1 is no-voltage, reaches the PWM dim signal input DIM of LED drive chip U1 through resistance R31, and high level passes through
Resistance R21, R22, Q1 conducting, Q3 conducting, but turning on through resistance R25, R26, Q4 simultaneously, Q2 just ends.Just there is no high electricity
Ordinary mail number is given to Q3, and now C1 is no-voltage, and because Q5 is N pipe, low level is ended, so the DC light modulation letter of LED drive chip U1
Number input BF/DMO is now to meet electric capacity C3 over the ground.Now LED drive chip U1 mode of operation is exactly DC light-modulating mode.Otherwise
Low level comes in be also this reason, and Q4 ends, and Q2 turns on.But Q3 ends, and now C1 is no-voltage, so LED drives core
The DC dim signal input BF/DMO of piece U1 is now to meet electric capacity C3 over the ground, and LED drive chip U1 mode of operation is exactly that DC adjusts
Optical mode.
In this utility model embodiment, the light adjusting circuit increase peripheral circuit that this utility model embodiment adopts is compatible
The multiple dimming mode of factory, greatly reducing PCBA assembly, minimizing need not stock, facilitate factory to get the raw materials ready.Improve light modulation
The production efficiency of circuit and maintenance efficiency.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this
Any modification, equivalent and improvement made within the spirit of utility model and principle etc., should be included in this utility model
Protection domain within.
Claims (7)
1. a kind of light adjusting circuit of compatible multiple dimming modes is it is characterised in that the light modulation of described compatible multiple dimming modes is electric
Road includes：
Resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, resistance R29,
Resistance R30, resistance R31, electric capacity C1, electric capacity C2, electric capacity C3, first switch pipe, second switch pipe, the 3rd switching tube, the 4th open
Guan Guan, the 5th switching tube and LED drive chip U1；
The first end of described resistance R21 be dim signal input, described resistance R31 be connected to described dim signal input with
Between the PWM dim signal input DIM of LED drive chip U1, the second described first switch pipe of termination of described resistance R21
Control end, the hot end of described first switch pipe connects the control end of described 3rd switching tube by resistance R24, and described first opens
Close the cold end ground connection of pipe, described resistance R22 is connected between control end and the cold end of described first switch pipe, described
The control end of the 3rd switching tube connects the hot end of described 3rd switching tube, the high electricity of described 3rd switching tube by resistance R23
Position end is grounded by electric capacity C2, and the cold end of described 3rd switching tube is grounded by electric capacity C1, the control of described 5th switching tube
End processed connects the cold end of described 3rd switching tube by resistance R29, and described resistance R30 is connected to the control of described 5th switching tube
Between end processed and ground, the cold end ground connection of described 5th switching tube, the described LED of high potential termination of described 5th switching tube drives
The DC dim signal input BF/DMO of dynamic chip U1, described electric capacity C3 be connected to described DC dim signal input BF/DMO with
Between ground, described resistance R25 is connected between described dim signal input and the control end of the 4th switching tube, and the described 4th opens
Close the cold end ground connection of pipe, described resistance R26 is connected between control end and the ground of the 4th switching tube, described 4th switching tube
High potential terminate the control end of described second switch pipe, the hot end of described second switch pipe connect by described resistance R28
DC source, described resistance R27 is connected between control end and the hot end of second switch pipe, described second switch pipe low
Potential end is grounded by electric capacity C2.
2. the light adjusting circuit of compatible multiple dimming modes as claimed in claim 1 is it is characterised in that described first switch pipe is adopted
Use audion Q1, the base stage of described audion Q1 is the control end of described first switch pipe, the current collection of described audion Q1 is extremely
The hot end of described first switch pipe, the cold end of the extremely described first switch pipe of transmitting of described audion Q1.
3. the light adjusting circuit of compatible multiple dimming modes as claimed in claim 1 is it is characterised in that described second switch pipe is adopted
Use audion Q2, the base stage of described audion Q2 is the control end of described second switch pipe, the current collection of described audion Q2 is extremely
The hot end of described second switch pipe, the cold end of the extremely described second switch pipe of transmitting of described audion Q2.
4. the light adjusting circuit of compatible multiple dimming modes as claimed in claim 1 is it is characterised in that described 3rd switching tube is adopted
Use audion Q3, the base stage of described audion Q3 is the control end of described 3rd switching tube, the transmitting of described audion Q3 is extremely
The hot end of described 3rd switching tube, the cold end of extremely described 3rd switching tube of current collection of described audion Q3.
5. the light adjusting circuit of compatible multiple dimming modes as claimed in claim 1 is it is characterised in that described 4th switching tube is adopted
Use audion Q4, the base stage of described audion Q4 is the control end of described 4th switching tube, the current collection of described audion Q4 is extremely
The hot end of described 4th switching tube, the cold end of extremely described 4th switching tube of transmitting of described audion Q4.
6. the light adjusting circuit of compatible multiple dimming modes as claimed in claim 1 is it is characterised in that described 5th switching tube is adopted
Use audion Q5, the base stage of described audion Q5 is the control end of described 5th switching tube, the current collection of described audion Q5 is extremely
The hot end of described 5th switching tube, the cold end of extremely described 5th switching tube of transmitting of described audion Q5.
7. a kind of display device it is characterised in that described display device include compatible many as described in any one of claim 1-6
Plant the light adjusting circuit of dimming mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620957074.9U CN205993001U (en) | 2016-08-26 | 2016-08-26 | A kind of light adjusting circuit of compatible multiple dimming modes and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620957074.9U CN205993001U (en) | 2016-08-26 | 2016-08-26 | A kind of light adjusting circuit of compatible multiple dimming modes and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205993001U true CN205993001U (en) | 2017-03-01 |
Family
ID=58107777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620957074.9U Withdrawn - After Issue CN205993001U (en) | 2016-08-26 | 2016-08-26 | A kind of light adjusting circuit of compatible multiple dimming modes and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205993001U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211474A (en) * | 2016-08-26 | 2016-12-07 | 合肥惠科金扬科技有限公司 | The light adjusting circuit of the multiple dimming mode of a kind of compatibility and display device |
-
2016
- 2016-08-26 CN CN201620957074.9U patent/CN205993001U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211474A (en) * | 2016-08-26 | 2016-12-07 | 合肥惠科金扬科技有限公司 | The light adjusting circuit of the multiple dimming mode of a kind of compatibility and display device |
| CN106211474B (en) * | 2016-08-26 | 2018-04-17 | 合肥惠科金扬科技有限公司 | A kind of light adjusting circuit and display device of a variety of dimming modes of compatibility |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170301 Effective date of abandoning: 20180417 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170301 Effective date of abandoning: 20180417 |