CN106067292A - A kind of backlight source driving circuit and display device - Google Patents
A kind of backlight source driving circuit and display device Download PDFInfo
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- CN106067292A CN106067292A CN201610630246.6A CN201610630246A CN106067292A CN 106067292 A CN106067292 A CN 106067292A CN 201610630246 A CN201610630246 A CN 201610630246A CN 106067292 A CN106067292 A CN 106067292A
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- subelement
- control module
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- resistance
- brightness control
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention belongs to backlight control field, it is provided that a kind of backlight source driving circuit and display device.The embodiment of the present invention controls the amplitude of supply voltage by voltage control module, avoid due to excessive pressure damages drive circuit, improve the reliability and stability of drive circuit, and generate the first brightness control signal and the second brightness control signal respectively by the first independent brightness control module and the second brightness control module, to drive control the first backlight source module and the brightness of the second backlight source module respectively, the brightness making backlight shows more accurate, promotes display effect.
Description
Technical field
The invention belongs to backlight control field, particularly relate to a kind of backlight source driving circuit and display device.
Background technology
Backlight is widely used in the row such as touch screen, TV, LCD/LCM, mobile phone, panel computer, GPS, solaode
Industry, locates industry-leading level, and the automatic coating production line of company's multimachine combination realizes full automation and produces, and can be that client saves
The direct labor of more than 80%, realizes recruitment cost is greatly lowered for enterprise, provides a whole set of production technology being suitable for for enterprise
Flow process and production solution.
At present, backlight source driving circuit uses the driving source of single channel to realize driving mostly, it is impossible to the finest control shows
Show brightness.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of backlight source driving circuit, it is intended to solve current backlight driver electricity
Road can not be the finest control display brightness problem.
The embodiment of the present invention is achieved in that a kind of backlight source driving circuit, is connected between power supply and backlight, institute
State circuit to include:
Voltage control module, for controlling the amplitude of electric power output voltage, the input of described voltage control module is with power supply even
Connect；
First brightness control module, generates the first brightness control signal, the electricity of described first brightness control module after power supply
Source is connected with the outfan of voltage control module；
Second brightness control module, generates the second brightness control signal, the electricity of described second brightness control module after power supply
Source is connected with the outfan of voltage control module；
Drive module, for according to described first brightness control signal and described second brightness control signal respectively to the first backlight
Source module and the second backlight source module are driven controlling and brightness regulation, and the power end of described driving module is connected with power supply,
First control end of described driving module, second control end respectively with the outfan of described first brightness control module, described the
The outfan of two brightness control module connects, the first outfan of described driving module, the second outfan respectively with the first backlight
The current input terminal of source module, the current input terminal of the second backlight source module connect, the current output terminal of the first backlight source module,
The current output terminal of the second backlight source module is connected with the first feedback end and second feedback end of described driving module respectively.
The another object of the embodiment of the present invention is to provide a kind of display device using above-mentioned backlight source driving circuit.
The embodiment of the present invention controls the amplitude of supply voltage by voltage control module, it is to avoid owing to excessive pressure damages drives
Circuit, improves the reliability and stability of drive circuit, and by the first brightness control module and the second brilliance control mould
Block generates the first brightness control signal and the second brightness control signal respectively, to drive control the first backlight source module and the respectively
The brightness of two backlight source module, makes the brightness of backlight show more accurate, promotes display effect.
Accompanying drawing explanation
The structure chart of the backlight source driving circuit that Fig. 1 provides for the embodiment of the present invention；
The preferred exemplary circuit diagram of the backlight source driving circuit that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Below in conjunction with specific embodiment the present invention implemented and is described in detail:
Fig. 1 shows the structure of the backlight source driving circuit that the embodiment of the present invention provides, and for convenience of description, illustrate only and this
The part that invention is relevant.
As one embodiment of the invention, this backlight source driving circuit 1 is connected between power supply and backlight, including:
Voltage control module 12, for controlling the amplitude of electric power output voltage, the input of voltage control module 12 is with power supply even
Connect；
First brightness control module 13, generates the first brightness control signal, the electricity of the first brightness control module 13 after power supply
Source is connected with the outfan of voltage control module 12；
Second brightness control module 14, generates the second brightness control signal, the electricity of the second brightness control module 14 after power supply
Source is connected with the outfan of voltage control module 12；
Drive module 11, for according to the first brightness control signal and the second brightness control signal respectively to the first backlight source module
It is driven controlling and brightness regulation with the second backlight source module, drives the power end of module 11 to be connected with power supply, drive module
The first control end of 11, second control end respectively with outfan, second brightness control module 14 of the first brightness control module 13
Outfan connect, drive the first outfan of module 11, the second outfan to input with the electric current of the first backlight source module respectively
End, the current input terminal of the second backlight source module connect, the current output terminal of the first backlight source module, second backlight source module
Current output terminal is connected with the first feedback end driving module 11 and the second feedback end respectively.
In embodiments of the present invention, by voltage control module 11 to carrying out voltage stabilizing after source voltage, to reduce
Supply voltage, it is to avoid too high voltage burns the first brightness control module and the second brightness control module, voltage control module handle
Voltage after blood pressure lowering, voltage stabilizing is supplied to the first brightness control module 13 and the second brightness control module 14, the first brilliance control
Module 13 and the second brightness control module 14 generate the first brightness control signal and the second brightness control signal respectively, with by driving
First backlight source module and the second backlight source module are driven controlling by multiple control ends of dynamic model block 11 respectively.
The embodiment of the present invention controls the amplitude of supply voltage by voltage control module, it is to avoid owing to excessive pressure damages drives
Circuit, improves the reliability and stability of drive circuit, and by the first independent brightness control module and the second brightness
Control module generates the first brightness control signal and the second brightness control signal respectively, to drive control the first backlight mould respectively
Group and the brightness of the second backlight source module, make the brightness of backlight show more accurate, promote display effect.
Fig. 2 shows the preferred exemplary circuit structure of the backlight source driving circuit that the embodiment of the present invention provides, for the ease of
Illustrate, illustrate only part related to the present invention.
As one embodiment of the invention, backlight includes the first backlight source module, the second backlight source module and the 3rd back of the body
Light source module, voltage control module 12 includes: resistance R4, electric capacity C4 and Zener diode D1；
One end of resistance R4 is the input of voltage control module 12, and the other end of resistance R4 is the output of voltage control module 12
End is connected with one end of electric capacity C4 and the negative electrode of Zener diode D1 simultaneously, the other end of electric capacity C4 and the sun of Zener diode D1
Pole ground connection simultaneously.
Preferably, the first brightness control module 13 includes: it is single that resistance RA1, resistance RB1, electric capacity C5 and second control son
Unit U2；
One end of resistance RA1 is that the power end and second of the first brightness control module 13 controls the power end V+ of subelement U2 even
Connecing, the other end of resistance RA1 is connected with one end and the second charging end DIS controlling subelement U2 of resistance RB1 simultaneously, resistance
The other end of RB1 and second controls the threshold test end TH of subelement U2 and connects, and second controls the threshold test end of subelement U2
TH is also connected with the second triggering end TRIG controlling subelement U2, and second controls the triggering end TRIG of subelement U2 by electric capacity C5
Ground connection, second controls the earth terminal ground connection of subelement, and the second outfan controlling subelement is the first brightness control module 13
Outfan.
As one embodiment of the present invention, the second brightness control module 14 includes: resistance RA2, resistance RB2, electric capacity C6
And the 3rd control subelement U3；
One end of resistance RA2 is that the power end and the 3rd of the second brightness control module 14 controls the power end V+ of subelement U3 even
Connecing, the other end of resistance RA2 is connected with one end and the 3rd charging end DIS controlling subelement U3 of resistance RB2 simultaneously, resistance
The other end of RB2 and the 3rd controls the threshold test end TH of subelement U3 and connects, and the 3rd controls the threshold test end of subelement U3
TH is also connected with the 3rd triggering end TRIG controlling subelement U3, and the 3rd controls the triggering end TRIG of subelement U3 by electric capacity C6
Ground connection, the 3rd controls the earth terminal ground connection of subelement U3, and the 3rd outfan controlling subelement U3 is the second brightness control module
The outfan of 14.
As one embodiment of the present invention, module 11 is driven to include: resistance R1, resistance R2, resistance R3, electric capacity C1, electricity
Hold C2, electric capacity C3 and first and control subelement U1；
The first multiple inputs (IN1, IN2, IN3) controlling subelement U1 are the power end driving module 11 by electric capacity C1
Ground connection, first controls the earth terminal GND ground connection of subelement U1, and the first output end of pressure-stabilizing REG controlling subelement U1 passes through electric capacity
C3 ground connection, the first multiple control ends (DIM1, DIM2, DIM3) controlling subelement U1 are respectively the multiple controls driving module 11
End, the first detection set of time end LGC controlling subelement U1 passes through electric capacity C2 ground connection, and first controls the multiple defeated of subelement U1
Going out end (OUT1, OUT2, OUT3) is the multiple outfans driving module 11, and first controls multiple test sides of subelement U1
(CS1, CS2, CS3) be respectively drive module 11 multiple feedback end, first control subelement U1 multiple test sides (CS1,
CS2, CS3) respectively by resistance R1, resistance R2, resistance R3 ground connection.
As one embodiment of the invention, this backlight source driving circuit 1 can also include:
At least one the 3rd brightness control module 15, generates the 3rd brightness control signal, the 3rd brightness control module after power supply
The power end of 15 is connected with the outfan of voltage control module 11, the outfan of the 3rd brightness control module 15 and driving module 11
One or more 3rd control ends connect.
The internal structure of the 3rd brightness control module 15 and the first brightness control module 13 or the second brightness control module 14
Internal structure identical, here is omitted.
As one embodiment of the present invention, second control subelement or the described 3rd to control subelement to be first micro-process
Chip, the first control subelement is the second micro-chip processor.
Below the operation principle of the embodiment of the present invention is illustrated: owing to first controls the pressure degree of subelement U1 relatively
Greatly, therefore need not supply voltage blood pressure lowering, directly supply voltage is controlled subelement U1 to first and power, the first brilliance control
Module the 13, second brightness control module 14 and the 3rd brightness control module 15 are controlled to first by DIM1, DIM2, DIM3 respectively
Subunit U1 inputs brightness control signal PWM1, PWM2, PWM3, by the dutycycle of each brightness control signal PWM respectively
Regulate each road and drive electric current, and then realize individually regulating the brightness of each backlight source module, and brightness control signal PWM1, PWM2,
The dutycycle of PWM3 can be by resistance RA1 corresponding to regulation and resistance RB1, or resistance RA2 and resistance RB2, or resistance RA3 and
The resistance of resistance RB3 is adjusted.
Brightness control signal PWM enables effectively for input when high level, such as, when DIM1 end is high level, pass through
Corresponding OUT1 end output driving current, drives the first backlight source module with correspondence.When DIM end input low level, closedown is driven
Dynamic output.
First controls subelement U1 detects each road driving electric current by CS1, CS2, CS3 end, and each road drives current feedback extremely
After first controls subelement U1, by comparing, if feedback current is excessive, PWM1 signal can be regulated by resistance RA1 and resistance RB1
Reduce dutycycle, drive electric current to reduce, otherwise, if feedback current is excessive, then regulate PWM1 by resistance RA1 and resistance RB1
Signal increase dutycycle, with raise drive electric current.
GOOD end is backlight open circuit test side, when backlight connects normal, exports high level, opens if backlight connects
Road, or the input of brightness control signal exceedes delay time, GOOD end then output low level, and this port can hang in the not used time
Sky, and whether be open circuit by detecting the high and low electrical level judging backlight of this port whenever necessary.
The another object of the embodiment of the present invention is to provide a kind of display device using above-mentioned backlight source driving circuit.
The embodiment of the present invention controls the amplitude of supply voltage by voltage control module, it is to avoid owing to excessive pressure damages drives
Circuit, improves the reliability and stability of drive circuit, and by the first independent brightness control module and the second brightness
Control module generates the first brightness control signal and the second brightness control signal respectively, to drive control the first backlight mould respectively
Group and the brightness of the second backlight source module, make the brightness of backlight show more accurate, promote display effect.
These are only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Any amendment, equivalent and the improvement etc. made within principle, should be included within the scope of the present invention.
Claims (9)
1. a backlight source driving circuit, is connected between power supply and backlight, it is characterised in that described backlight includes first
Backlight source module and the second backlight source module, described circuit includes:
Voltage control module, for controlling the amplitude of electric power output voltage, the input of described voltage control module is with power supply even
Connect；
First brightness control module, generates the first brightness control signal, the electricity of described first brightness control module after power supply
Source is connected with the outfan of voltage control module；
Second brightness control module, generates the second brightness control signal, the electricity of described second brightness control module after power supply
Source is connected with the outfan of voltage control module；
Drive module, for according to described first brightness control signal and described second brightness control signal respectively to the first backlight
Source module and the second backlight source module are driven controlling and brightness regulation, and the power end of described driving module is connected with power supply,
First control end of described driving module, second control end respectively with the outfan of described first brightness control module, described the
The outfan of two brightness control module connects, the first outfan of described driving module, the second outfan respectively with the first backlight
The current input terminal of source module, the current input terminal of the second backlight source module connect, the current output terminal of the first backlight source module,
The current output terminal of the second backlight source module is connected with the first feedback end and second feedback end of described driving module respectively.
Circuit the most according to claim 1, it is characterised in that described voltage control module includes: resistance R4, electric capacity C4 with
And Zener diode D1；
The input that one end is described voltage control module of described resistance R4, the other end of described resistance R4 is described voltage control
The outfan of molding block is connected with the negative electrode of one end of described electric capacity C4 and described Zener diode D1 simultaneously, described electric capacity C4's
The anode of the other end and described Zener diode D1 ground connection simultaneously.
Circuit the most according to claim 1, it is characterised in that described first brightness control module includes: resistance RA1, electricity
Resistance RB1, electric capacity C5 and second controls subelement；
One end of described resistance RA1 is power end and described second power supply controlling subelement of described first brightness control module
End connects, and the other end of described resistance RA1 controls the charging end of subelement with one end of described resistance RB1 and described second simultaneously
Connecting, the other end of described resistance RB1 is connected with the described second threshold test end controlling subelement, and described second controls son list
The threshold test end of unit is also connected with the described second triggering end controlling subelement, and described second controls the triggering end of subelement U2
By described electric capacity C5 ground connection, described second controls the earth terminal ground connection of subelement, and described second controls the outfan of subelement
Outfan for described first brightness control module.
Circuit the most according to claim 1, it is characterised in that described second brightness control module includes: resistance RA2, electricity
Resistance RB2, electric capacity C6 and the 3rd controls subelement；
One end of described resistance RA2 is power end and the described 3rd power supply controlling subelement of described second brightness control module
End connects, and the other end of described resistance RA2 controls the charging end of subelement with one end of described resistance RB2 and the described 3rd simultaneously
Connecting, the other end of described resistance RB2 is connected with the described 3rd threshold test end controlling subelement, and the described 3rd controls son list
The threshold test end of unit is also connected with the described 3rd triggering end controlling subelement, and the described 3rd triggering end controlling subelement leads to
Crossing described electric capacity C6 ground connection, the described 3rd controls the earth terminal ground connection of subelement, and the described 3rd outfan controlling subelement is
The outfan of described second brightness control module.
5. according to the circuit described in claim 3 or 4, it is characterised in that described second controls subelement or the described 3rd controls
Subelement is the first micro-chip processor.
6. according to the circuit described in any one of Claims 1-4, it is characterised in that described driving module includes: resistance R1, electricity
Resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3 and first control subelement；Described first controls the multiple defeated of subelement
Enter end and be the power end of described driving module by described electric capacity C1 ground connection, the ground connection termination of described first control subelement
Ground, the described first output end of pressure-stabilizing controlling subelement passes through described electric capacity C3 ground connection, and described first controls the multiple of subelement
Controlling end and be respectively multiple control ends of described driving module, the described first detection set of time end controlling subelement passes through institute
Stating electric capacity C2 ground connection, described first controls multiple outfans that multiple outfans are described driving module of subelement, and described the
The one multiple test sides controlling subelement are respectively multiple feedback end of described driving module, and described first control subelement is many
Individual test side is respectively by described resistance R1, described resistance R2, described resistance R3 ground connection.
Circuit the most according to claim 6, it is characterised in that described first control subelement is the second micro-chip processor.
8. according to the circuit described in any one of Claims 1-4, it is characterised in that described circuit also includes: at least one the 3rd is bright
Degree control module, generates the 3rd brightness control signal, the power end of described 3rd brightness control module and voltage after power supply
The outfan of control module connects, one or more the of the outfan of described 3rd brightness control module and described driving module
Three control end connects.
9. a display device, it is characterised in that described display device includes according to the back of the body described in any one of claim 1 to 8
Light source driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630246.6A CN106067292A (en) | 2016-08-04 | 2016-08-04 | A kind of backlight source driving circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630246.6A CN106067292A (en) | 2016-08-04 | 2016-08-04 | A kind of backlight source driving circuit and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106067292A true CN106067292A (en) | 2016-11-02 |
Family
ID=57206806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610630246.6A Pending CN106067292A (en) | 2016-08-04 | 2016-08-04 | A kind of backlight source driving circuit and display device |
Country Status (1)
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| CN (1) | CN106067292A (en) |
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| CN107230456A (en) * | 2017-08-10 | 2017-10-03 | 京东方科技集团股份有限公司 | A kind of display device and brightness adjusting method |
| CN116131618A (en) * | 2022-12-13 | 2023-05-16 | 深圳市麦格米特驱动技术有限公司 | Aging test device, method and system |
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