CN208317056U - A kind of multifunctional integrated low-cost backlight circuit and display equipment - Google Patents
A kind of multifunctional integrated low-cost backlight circuit and display equipment Download PDFInfo
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- CN208317056U CN208317056U CN201820349129.7U CN201820349129U CN208317056U CN 208317056 U CN208317056 U CN 208317056U CN 201820349129 U CN201820349129 U CN 201820349129U CN 208317056 U CN208317056 U CN 208317056U
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Abstract
A kind of multifunctional integrated low-cost backlight circuit and display equipment, it includes backlight control chip, power supply module, the boost module being connected between power supply module and backlight module, the overvoltage protective module being connect with boost module, for receiving the adjusting port of PWM dim signal, the positive and negative adjustment module being connect with adjusting port, the DC light-adjusting module being connect with positive and negative adjustment module, the PWM light-adjusting module being connect with positive and negative adjustment module, the over-current detection module being connect with boost module, the current detection module being connect with DC light-adjusting module and backlight module, pass through the compatible PWM light-adjusting module of setting, DC light-adjusting module and positive and negative adjustment module, it can realize that simultaneously PWM is dimmed on a board, DC light modulation, a variety of dimming modes of positive light modulation and negative light modulation, different components are made to reach a plate general, pole Big reduction board component, and different potted elements and change peripheral cell quantity, greatly improvement cost can be selected according to the size of backlight module.
Description
Technical field
The utility model belongs to display control circuit technical field, more particularly to a kind of multifunctional integrated low-cost backlight
Circuit and display equipment.
Background technique
Currently, the backlight regulative mode of display equipment becomes increasingly complex, including DC is dimmed, PWM light modulation, positive light modulation, negative tune
The various combinations such as light, low current, high current, small voltage and big voltage, and every kind of different backlight tune in existing display equipment
Section mode corresponds to a board, such as: PWM light modulation uses a board, and DC light modulation uses another board, leads to board
It is more, to keep board collocation difficult.
Therefore, present in traditional technical solution for show equipment backlight circuit have a single function and it is at high cost
The problem of.
Utility model content
The utility model provides a kind of multifunctional integrated low-cost backlight circuit, it is intended to solve in traditional technical solution
It is existing for show equipment backlight circuit have a single function and problem at high cost.
The utility model is realized in this way a kind of multifunctional integrated low-cost backlight circuit, comprising:
For providing the power supply module of electric energy；
It is connected between the power supply module and backlight module, for the output voltage of the power supply module to be carried out voltage
The boost module of the backlight module is supplied electricity to after transformation；
It is connect with the boost module, for detecting the output voltage and output voltage feedback signal of the boost module
Overvoltage protective module；
For receiving the adjusting port of PWM dim signal；
It is connect with the adjusting port, the positive and negative adjustment module for overturning the PWM dim signal；
It is connect with the positive and negative adjustment module, for receiving the PWM light-adjusting module of the PWM dim signal；
It is connect with the positive and negative adjustment module, for the received PWM dim signal to be adjusted to the DC tune of DC signal
Optical module；
It is connect with the boost module, the output electric current and output overcurrent for detecting the boost module detect signal
Over-current detection module；
It is connect with the DC light-adjusting module and the backlight module, for detecting the operating current of the backlight module and defeated
The current detection module of current feedback signal out；
With the power supply module, the boost module, the over-current detection module, the overvoltage protective module, the PWM
Light-adjusting module, the DC light-adjusting module and current detection module connection, for receiving and being believed according to the Voltage Feedback
Number, at least one of the PWM dim signal, the DC signal, the over-current detection signal and the current feedback signal
Adjust the output voltage of the boost module or the backlight control chip of electric current.
Preferably, the boost module includes switch chip, inductance, first diode, first capacitor, the switch chip
Control terminal as the boost module control terminal and connect with the driving pin of the backlight control chip, the inductance
First end as the boost module voltage input end and connect with the voltage output end of the power supply module, the inductance
The anode of second end and the first diode is connect with the input terminal of the switch chip, the output end of the switch chip
As the boost module the first output end and connect with the input terminal of the over-current detection module, the of the first capacitor
The cathode of one end and the first diode connect altogether as the boost module second output terminal and with the backlight module
Anode connection, the second end ground connection of the first capacitor.
Preferably, the overvoltage protective module includes the second capacitor, first resistor and second resistance, second capacitor
First end, the first end of the first end of the first resistor and the second resistance connects altogether as the overvoltage protective module
Voltage output end and connect with the overvoltage protection pin of the backlight control chip, the second end of the first resistor is as institute
It states the voltage input end of overvoltage protective module and is connect with the second output terminal of the boost module, the second of the second resistance
The second end of end and second capacitor is grounded altogether.
Preferably, the over-current detection module includes 3rd resistor, the 4th resistance and the 5th resistance, the 3rd resistor
First end, the first end of the 4th resistance and the first end of the 5th resistance connect altogether as the over-current detection module
Input terminal and connect with the first output end of the boost module, the second end of the 3rd resistor and the 4th resistance
Second end is grounded altogether, the second end of the 5th resistance as the over-current detection module output end and with the backlight control
The overcurrent feedback pin of chip connects.
Preferably, the current detection module include the 6th resistance and the 7th resistance, the first end of the 6th resistance and
The first end of 7th resistance connects the input terminal as the current detection module altogether and connect with the negative terminal of the backlight module, institute
State the current feedback of the second end of the 7th resistance as the output end of the current detection module and with the backlight control chip
Pin connection, the second end ground connection of the 6th resistance.
Preferably, the PWM light-adjusting module includes third capacitor, the 8th resistance and the 9th resistance, the 8th resistance
First end as the PWM light-adjusting module input terminal and connect with the output end of the positive and negative light-adjusting module, the described 8th
The first end of the second end of resistance, the first end of the third capacitor and the 9th resistance is connect altogether as the PWM light-adjusting module
Output end and connect with the pwm signal input pin of the backlight control chip, the second end of the third capacitor and
The second end of nine resistance is grounded altogether.
Preferably, the DC light-adjusting module includes the second diode, the 4th capacitor, the tenth resistance and eleventh resistor,
The first end of tenth resistance as the DC light-adjusting module input terminal and connect with the positive and negative light-adjusting module, described
The anode of the first end of four capacitors and second diode is connect with the second end of the tenth resistance, the 4th capacitor
Second end ground connection, the cathode of second diode connect with the first end of 11 resistance, the second of the eleventh resistor
It holds the output end as the DC light-adjusting module and is connect with the current feedback pin of the backlight control chip.
Preferably, the positive and negative adjustment module includes triode, twelfth resistor and thirteenth resistor, and the described 12nd
The first end of resistance as the positive and negative adjustment module input terminal and connect with the adjusting port, the twelfth resistor
Second end is connect with the base stage of the triode, the emitter of triode ground connection, the collector of the triode with it is described
The first end of thirteenth resistor connects, output end of the second end of the thirteenth resistor as the positive and negative adjustment module.
In addition, a kind of display equipment is additionally provided, including above-mentioned multifunctional integrated low-cost backlight circuit.
Above-mentioned multifunctional integrated low-cost backlight circuit passes through the compatible PWM light-adjusting module of setting, DC light-adjusting module
And positive and negative adjustment module, a variety of of PWM light modulation, DC light modulation, positive light modulation and negative light modulation can be realized simultaneously on a board
Dimming mode makes different components reach a plate general, is significantly reduced board component, and repairing factory process and producing line becomes letter
It is single, while having saved cost.Further, it is also possible to select different potted elements and change peripheral cell according to the size of backlight module
Quantity selects small package element and reduces peripheral cell such as the backlight module of small size, to realize big voltage, small voltage, big
The adjusting of electric current and low current, greatly improvement cost.
Detailed description of the invention
Fig. 1 is multifunctional integrated low-cost backlight circuit module schematic diagram provided by the embodiment of the utility model；
Fig. 2 is the multifunctional integrated low-cost backlight circuit diagram that an embodiment of the present invention provides；
Fig. 3 is the multifunctional integrated low-cost backlight circuit diagram that another embodiment of the utility model provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 shows the multifunctional integrated low-cost backlight circuit module signal of the utility model preferred embodiment offer
Figure, for ease of description, only the parts related to this embodiment are shown, and details are as follows:
With reference to Fig. 1, a kind of multifunctional integrated low-cost backlight circuit, comprising: power supply module 100, boost module 200,
Overvoltage protective module 300, over-current detection module 401, current detection module 402, PWM light-adjusting module 501, DC light-adjusting module 502,
Positive and negative adjustment module 600 and backlight control chip 700.
Wherein, power supply module 100 is for providing electric energy；Boost module 200 be connected to power supply module 100 and backlight module it
Between, for supplying electricity to backlight module after the output voltage of power supply module 100 is carried out voltage transformation；Overvoltage protective module 300 with
Boost module 200 connects, for detecting the output voltage and output voltage feedback signal of boost module 200；Port is adjusted to be used for
Receive PWM dim signal；Positive and negative adjustment module 600 is connect with port is adjusted, for overturning PWM dim signal；PWM dims mould
Block 501 is connect with positive and negative adjustment module 600, for receiving PWM dim signal；DC light-adjusting module 502 and positive and negative adjustment module 600
Connection, for received PWM dim signal to be adjusted to DC signal；Over-current detection module 401 is connect with boost module 200, is used
Signal is detected in the output electric current and output overcurrent of detection boost module 200；Current detection module 402 and DC light-adjusting module 502
It is connected with backlight module, for detecting the operating current of backlight module and exporting current feedback signal；Backlight control chip 700 divides
Not with power supply module 100, boost module 200, over-current detection module 401, overvoltage protective module 300, PWM light-adjusting module 501, DC
Light-adjusting module 502 and current detection module 402 connect, for receiving and according to voltage feedback signal, PWM dim signal, DC
The output voltage or electric current of at least one of signal, over-current detection signal and current feedback signal adjusting boost module 200.
Fig. 2 is referred in one of the embodiments, which includes switch chip Q1, inductance L, the one or two pole
The control terminal of pipe D1 and first capacitor C1, switch chip Q1 as boost module 200 control terminal and with backlight control chip
700 driving pin GATE connection, the first end of inductance L as boost module 200 voltage input end and with power supply module 100
Voltage output end connection, the second end of inductance L and the anode of first diode D1 connect with the input terminal of switch chip Q1,
The output end of switch chip Q1 as boost module 200 the first output end and connect with the input terminal of over-current detection module 401,
The first end of first capacitor C1 and the cathode of first diode D1 connect the second output terminal and and backlight as boost module 200 altogether
The anode of mould group connects, the second end ground connection of first capacitor C1.Above description is said by taking small-power/small size backlight module as an example
Bright related embodiment.In the present embodiment, capacitor quantity can be increased and decreased according to backlight module size/watt level, be implemented as
This reduction.
In another embodiment, with reference to Fig. 3, by taking high-power/large scale backlight module as an example, the boost module 200 packet
The control terminal of switch chip Q1, inductance L, first diode D1 and multiple first capacitor C1, switch chip Q1 are included as boosting
The control terminal of module 200 is simultaneously connect with the driving pin GATE of backlight control chip 700, and the first end of inductance L is as boosting mould
The voltage input end of block 200 is simultaneously connect with the voltage output end of power supply module 100, the second end and first diode D1 of inductance L
Anode connect with the input terminal of switch chip Q1, the first output of the output end of switch chip Q1 as boost module 200
It holds and is connect with the input terminal of over-current detection module 401, the first end of multiple first capacitor C1 and the cathode of first diode D1
The second output terminal as boost module 200 is connect altogether and is connect with the anode of backlight module, the second end of multiple first capacitor C1
Ground connection.Specifically, selecting C1 number of first capacitor by size/power decision of backlight module.In the present embodiment, according to backlight
Mould packet size/power increases to increase quantity/capacity of output capacitance, improves capacitor stability, while improving capacitor
Service life.
It should be noted that switch chip Q1 is N-type metal-oxide-semiconductor, the input, output end of switch chip Q1 and control terminal point
Not Wei metal-oxide-semiconductor drain electrode, source electrode and grid.
Fig. 2 is referred in one of the embodiments, which includes the second capacitor C2, first resistor R1
And second resistance R2, the first end of the first end of the second capacitor C2, the first end of first resistor R1 and second resistance R2 are total
It connects the voltage output end as overvoltage protective module 300 and is connect with the overvoltage protection pin OVP of backlight control chip 700, the
The second end of one resistance R1 as overvoltage protective module 300 voltage input end and with the second output terminal of boost module 200 connect
It connects, the second end of the second end of second resistance R2 and the second capacitor C2 are grounded altogether.
Fig. 2 is referred in one of the embodiments, which includes 3rd resistor R3, the 4th resistance R4
And the 5th resistance R5, the first end of the first end of 3rd resistor R3, the first end of the 4th resistance R4 and the 5th resistance R5 are total
It connects the input terminal as over-current detection module 401 and is connect with the first output end of boost module 200, the second of 3rd resistor R3
End and the second end of the 4th resistance R4 are grounded altogether, the second end of the 5th resistance R5 as over-current detection module 401 output end simultaneously
It is connect with the overcurrent feedback pin CS of backlight control chip 700.
Fig. 2 is referred in one of the embodiments, which includes the 6th resistance R6 and the 7th resistance
R7, the first end of the 6th resistance R6 and the first end of the 7th resistance R7 connect altogether as current detection module 402 input terminal and with
The negative terminal of backlight module connects, output end and and backlight control of the second end of the 7th resistance R7 as current detection module 402
The current feedback pin FB connection of chip 700, the second end ground connection of the 6th resistance R6.Specifically, can be by adjusting the 7th resistance
The resistance value of R7 adjusts the operating current of backlight module.Wherein, the 7th resistance R11 can be 2K Ω.
In another embodiment, with reference to Fig. 3, which includes multiple 6th resistance R6 and one the 7th
Resistance R7, the first end of multiple 6th resistance R6 and the first end of the 7th resistance R7 are connect altogether as the defeated of current detection module 402
Enter to hold and connect with the negative terminal of backlight module, the second end of the 7th resistance R7 as current detection module 402 output end and with
The current feedback pin FB connection of backlight control chip 700, the second end ground connection of multiple 6th resistance R6.Specifically, selecting the
Six numbers of resistance R6 by backlight module size/power decision.It in the present embodiment, can be according to size/function of backlight module
Rate size adjusts the quantity of above-mentioned 6th resistance R6, so that changing resistance value reaches the mesh for changing the electric current by backlight module
, realize that such as large scale/power backlight module multiple 6th resistance R6 can be selected, to increase in the adjusting of high current and low current
Pass through the electric current of backlight module greatly.
Fig. 2 is referred in one of the embodiments, which includes third capacitor C3, the 8th resistance R8
And the first end of the 9th resistance R9, the 8th resistance R8 as PWM light-adjusting module 501 input terminal and with positive and negative light-adjusting module
600 output end connection, the first end of the second end of the 8th resistance R8, the first end of third capacitor C3 and the 9th resistance R9 are total
It connects the output end as PWM light-adjusting module 501 and is connect with the pwm signal input pin PWM of backlight control chip 700, third
The second end of capacitor C3 and the second end of the 9th resistance R9 are grounded altogether.
Fig. 2 is referred in one of the embodiments, which includes the second diode D2, the 4th capacitor
C4, the tenth resistance R10 and eleventh resistor R11, input terminal of the first end of the tenth resistance R10 as DC light-adjusting module 502
And connect with positive and negative light-adjusting module 600, the anode of the first end of the 4th capacitor C4 and the second diode D2 with the tenth resistance R10
Second end connection, the second end ground connection of the 4th capacitor C4, the cathode of the second diode D2 connect with the first end of 11 resistance,
The second end of eleventh resistor R11 as DC light-adjusting module 502 output end and draw with the current feedback of backlight control chip 700
Foot FB connection.Wherein, eleventh resistor R11 can be 22K Ω.
Fig. 2 is referred in one of the embodiments, which includes triode Q2, twelfth resistor
The first end of R12 and thirteenth resistor R13, twelfth resistor R12 as positive and negative adjustment module 600 input terminal and with adjusting
Port connection, the second end of twelfth resistor R12 are connect with the base stage of triode Q2, the emitter ground connection of triode Q2, three poles
The collector of pipe Q2 is connect with the first end of thirteenth resistor R13, and the second end of thirteenth resistor R13 is as positive and negative adjustment module
600 output end.In the present embodiment, PWM dim signal can be made to overturn by positive and negative adjustment module, realize positive light modulation and born
Light modulation.
Fig. 2 is referred in one of the embodiments, the chip which can be used SOP8 encapsulation is realized,
The over-current detection pin CS of the backlight control chip 700 is the first pin, and driving pin GATE is second pin, power pins
Vin is third pin, and ground pin GND is the 4th pin, and PWM input pin PWM is the 5th pin, and current feedback pin FB is the
Six pins, it is the 8th pin that over-voltage, which detects pin OVP,.
Fig. 2 is referred in one of the embodiments, and multifunctional integrated low-cost backlight circuit further includes filter module
800, filter module 800 is connected between boost module and backlight module, to defeated after boost module carries out voltage transformation
Voltage is filtered out, wherein the filter module 800 includes the 5th capacitor C5, and the first end of the 5th capacitor C5 forms filter
The input terminal and output end of wave module 800, the second end ground connection of the 5th capacitor C5, with reference to Fig. 2, the 5th capacitor C5 can be one
Capacitor is constituted；In a further embodiment, it is also possible to multiple capacitors with reference to Fig. 3, the 5th capacitor C5 to constitute in series and parallel.
Its working principle is illustrated by taking circuit shown in Fig. 3 as an example below, details are as follows:
PWM tune is exported to PWM light-adjusting module 501 or DC light-adjusting module 502 according to the specific light-modulating mode of backlight module
Optical signal is directly inputted to the pwm signal of backlight control chip 700 when PWM light-adjusting module 501 receives PWM dim signal
Pin PWM output pwm signal, when DC light-adjusting module 502 receives PWM dim signal, DC light-adjusting module 502 dims PWM
Signal is adjusted to DC signal, and exports DC signal, backlight control chip to the current feedback FB pin of backlight control chip 700
700 based on the received pwm signal or DC signal make its drive pin GATE control switch chip Q1 on-off so that power supply mould
Output is to filter module 800 after the output voltage of block 100 carries out voltage transformation, and filter module 800 is to the output voltage after transformation
It exports after being filtered to backlight module, in the whole process, 401 real-time detection boost module 200 of over-current detection module
Output electric current and the over-current detection pin CS fed-back current signals to backlight control chip 700, over-voltage detection module 300 it is real-time
The output voltage of boost module 200 and the over-voltage feedback pin OVP feedback voltage signal to backlight control chip 700 are detected, when
When output electric current is greater than reference current or output voltage greater than reference voltage, the driving pin GATE of backlight control chip 700
Control switch chip Q1 is disconnected, and the output voltage of boost module 200 is reduced, to protect backlight module.
In addition, also providing a kind of display equipment, which includes above-mentioned multifunctional integrated low-cost backlight electricity
Road.
The utility model has the beneficial effects that
(1) PWM light-adjusting module, DC light-adjusting module and the positive and negative adjustment module compatible by setting, can be in a board
A variety of dimming modes that are upper while realizing PWM light modulation, DC light modulation, positive light modulation and negative light modulation, make different components reach a plate logical
With being significantly reduced board component, repairing factory process and producing line becomes simple, saves production cost.
(2) setting can select different potted elements and change peripheral cell quantity according to the size of backlight module, from
And realize the adjusting of big voltage, small voltage, high current and low current, as small size backlight module can be selected small package element and
Peripheral cell quantity is reduced, cost can be greatly reduced.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (9)
1. a kind of multifunctional integrated low-cost backlight circuit, which is characterized in that the backlight circuit includes:
For providing the power supply module of electric energy；
It is connected between the power supply module and backlight module, for the output voltage of the power supply module to be carried out voltage transformation
The boost module of the backlight module is supplied electricity to afterwards；
It is connect with the boost module, the over-voltage of output voltage and output voltage feedback signal for detecting the boost module
Protective module；
For receiving the adjusting port of PWM dim signal；
It is connect with the adjusting port, the positive and negative adjustment module for overturning the PWM dim signal；
It is connect with the positive and negative adjustment module, for receiving the PWM light-adjusting module of the PWM dim signal；
It is connect with the positive and negative adjustment module, the DC for the received PWM dim signal to be adjusted to DC signal dims mould
Block；
It is connect with the boost module, for detecting the output electric current of the boost module and the overcurrent of output overcurrent detection signal
Detection module；
It is connect with the DC light-adjusting module and the backlight module, for detecting the operating current of the backlight module and exporting electricity
Flow the current detection module of feedback signal；
It is dimmed with the power supply module, the boost module, the over-current detection module, the overvoltage protective module, the PWM
Module, the DC light-adjusting module and current detection module connection, for receiving and according to the voltage feedback signal, institute
It states at least one of PWM dim signal, the DC signal, the over-current detection signal and described current feedback signal and adjusts institute
State the output voltage of boost module or the backlight control chip of electric current.
2. multifunctional integrated low-cost backlight circuit as described in claim 1, which is characterized in that the boost module includes
Switch chip, inductance, first diode, first capacitor, control of the control terminal of the switch chip as the boost module
It holds and is connect with the driving pin of the backlight control chip, the first end of the inductance is defeated as the voltage of the boost module
Enter to hold and connect with the voltage output end of the power supply module, the anode of the second end of the inductance and the first diode is equal
Connect with the input terminal of the switch chip, the output end of the switch chip as the boost module the first output end simultaneously
It is connect with the input terminal of the over-current detection module, the cathode of the first end of the first capacitor and the first diode connects altogether
As the boost module second output terminal and connect with the anode of the backlight module, the first capacitor second termination
Ground.
3. multifunctional integrated low-cost backlight circuit as claimed in claim 1 or 2, which is characterized in that the overvoltage protection
Module includes the second capacitor, first resistor and second resistance, and the first of the first end of second capacitor, the first resistor
End and the second resistance first end connect altogether as the overvoltage protective module voltage output end and with the backlight control
The overvoltage protection pin of coremaking piece connects, voltage input end of the second end of the first resistor as the overvoltage protective module
And connect with the second output terminal of the boost module, the second end of the second end of the second resistance and second capacitor is total
Ground connection.
4. multifunctional integrated low-cost backlight circuit as claimed in claim 1 or 2, which is characterized in that the over-current detection
Module includes 3rd resistor, the 4th resistance and the 5th resistance, and the first of the first end of the 3rd resistor, the 4th resistance
End and the 5th resistance first end connect altogether as the over-current detection module input terminal and with the boost module
The second end of the connection of first output end, the second end of the 3rd resistor and the 4th resistance is grounded altogether, the 5th resistance
Second end as the over-current detection module output end and connect with the overcurrent feedback pin of the backlight control chip.
5. multifunctional integrated low-cost backlight circuit as described in claim 1, which is characterized in that the current detection module
Including the 6th resistance and the 7th resistance, the first end of the 6th resistance and the first end of the 7th resistance are connect altogether as the electric current
The input terminal of detection module is simultaneously connect with the negative terminal of the backlight module, and the second end of the 7th resistance is examined as the electric current
It surveys the output end of module and is connect with the current feedback pin of the backlight control chip, the second termination of the 6th resistance
Ground.
6. multifunctional integrated low-cost backlight circuit as described in claim 1, which is characterized in that the PWM light-adjusting module
Including third capacitor, the 8th resistance and the 9th resistance, the first end of the 8th resistance is as the defeated of the PWM light-adjusting module
Enter to hold and connect with the output end of the positive and negative adjustment module, the first of the second end of the 8th resistance, the third capacitor
End and the 9th resistance first end connect altogether as the PWM light-adjusting module output end and with the backlight control chip
The connection of pwm signal input pin, the second end of the third capacitor and the second end of the 9th resistance are grounded altogether.
7. multifunctional integrated low-cost backlight circuit as described in claim 1 or 6, which is characterized in that the DC dims mould
Block includes the second diode, the 4th capacitor, the tenth resistance and eleventh resistor, described in the first end of the tenth resistance is used as
The input terminal of DC light-adjusting module is simultaneously connect, the first end of the 4th capacitor and the two or two pole with the positive and negative adjustment module
The anode of pipe is connect with the second end of the tenth resistance, the second end ground connection of the 4th capacitor, second diode
Cathode connect with the first end of 11 resistance, output end of the second end of the eleventh resistor as the DC light-adjusting module
And it is connect with the current feedback pin of the backlight control chip.
8. multifunctional integrated low-cost backlight circuit as described in claim 1, which is characterized in that the positive and negative adjustment module
Including triode, twelfth resistor and thirteenth resistor, the first end of the twelfth resistor is as the positive negative regulator mould
The input terminal of block is simultaneously connect with the adjusting port, and the second end of the twelfth resistor is connect with the base stage of the triode,
The emitter of the triode is grounded, and the collector of the triode is connect with the first end of the thirteenth resistor, and described the
Output end of the second end of 13 resistance as the positive and negative adjustment module.
9. a kind of display equipment, including the described in any item multifunctional integrated low-cost backlight circuits of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820349129.7U CN208317056U (en) | 2018-03-14 | 2018-03-14 | A kind of multifunctional integrated low-cost backlight circuit and display equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820349129.7U CN208317056U (en) | 2018-03-14 | 2018-03-14 | A kind of multifunctional integrated low-cost backlight circuit and display equipment |
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| CN208317056U true CN208317056U (en) | 2019-01-01 |
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| CN201820349129.7U Active CN208317056U (en) | 2018-03-14 | 2018-03-14 | A kind of multifunctional integrated low-cost backlight circuit and display equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377595A (en) * | 2018-03-14 | 2018-08-07 | 合肥惠科金扬科技有限公司 | A kind of multifunctional integrated low-cost backlight circuit and display equipment |
-
2018
- 2018-03-14 CN CN201820349129.7U patent/CN208317056U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108377595A (en) * | 2018-03-14 | 2018-08-07 | 合肥惠科金扬科技有限公司 | A kind of multifunctional integrated low-cost backlight circuit and display equipment |
| CN108377595B (en) * | 2018-03-14 | 2023-10-20 | 合肥惠科金扬科技有限公司 | Multifunctional integrated low-cost backlight circuit and display device |
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