CN110267396A - The negative light adjusting circuit of direct current and display device - Google Patents
The negative light adjusting circuit of direct current and display device Download PDFInfo
- Publication number
- CN110267396A CN110267396A CN201910509009.8A CN201910509009A CN110267396A CN 110267396 A CN110267396 A CN 110267396A CN 201910509009 A CN201910509009 A CN 201910509009A CN 110267396 A CN110267396 A CN 110267396A
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- circuit
- comparison circuit
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- direct current
- input terminal
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention discloses a kind of negative light adjusting circuit of direct current and display devices, the negative light adjusting circuit of direct current includes bleeder circuit and comparison circuit, the input terminal of the bleeder circuit receives analog voltage signal, the output end of the bleeder circuit is connect with the first input end of the comparison circuit, second input terminal of the comparison circuit and the output end of master chip connect, and the output end of the comparison circuit and the input terminal of backlight module connect.Technical solution of the present invention can be realized the negative light modulation of direct current.
Description
Technical field
The present invention relates to field of display technology, in particular to the negative light adjusting circuit of a kind of direct current and display device.
Background technique
There are two types of the dimming modes of display device, and one is direct current light modulation, another kind is PWM light modulation.
PWM light modulation is to make to flow through the electric current of LED light string constantly turn-on and turn-off by HF switch, passes through control
LED light string conducting dutycycle processed, to realize brightness regulation.
The direct current light modulation, is by the electric current of linear regulation LED light string, to realize brightness regulation.Wherein, most of tool
The LED drive chip of standby simulation dimming function is required to direct current and just dims (low level is dark, and high level is bright), and for part main core
For piece, the negative light modulation (low level is bright, and high level is dark) of direct current is more conducive to system design.But the dim signal of master chip can not
LED backlight control chip is directly fed, to not be able to satisfy requirement of the system to the negative light modulation of direct current.
Above content is only used for the technical solution that auxiliary understands the application, does not represent and recognizes that above content is existing skill
Art.
Summary of the invention
The present invention provides a kind of negative light adjusting circuit of direct current and display device, it is intended to realize the negative light modulation of direct current.
To achieve the above object, the present invention provides a kind of negative light adjusting circuit of direct current, and the negative light adjusting circuit of direct current includes:
The input terminal of bleeder circuit, the bleeder circuit receives analog voltage signal；The bleeder circuit, be configured as by
It is exported after the analog voltage signal partial pressure；
Comparison circuit, the first input end of the comparison circuit are connect with the output end of the bleeder circuit, the comparison
Second input terminal of circuit and the output end of master chip connect, and the output end of the comparison circuit and the input terminal of backlight module connect
It connects；The comparison circuit is configured as being greater than second input terminal in the value of the voltage signal of first input end input
When the value of the first dim signal of input, the second dim signal of high level is exported to the backlight module；
The comparison circuit is additionally configured to be less than described second in the value of the voltage signal of first input end input
When the value of the first dim signal of input terminal input, low level second dim signal is exported to the backlight module.
Optionally, the bleeder circuit includes first resistor and second resistance, and the first end of the first resistor is institute
State the input terminal of bleeder circuit, the second end of the first resistor is the output end of the bleeder circuit, and with second electricity
The first end of resistance connects, the second end ground connection of the second resistance.
Optionally, when the first dim signal of master chip output is high level, the value of first dim signal
Greater than the value of the voltage signal of bleeder circuit output.
Optionally, the comparison circuit includes voltage comparator, and the positive input terminal of the voltage comparator is the comparison
The first input end of circuit, the negative input end of the voltage comparator are the second input terminal of the comparison circuit, the voltage
The output end of comparator is the output end of the comparison circuit.
Optionally, the comparison circuit further includes 3rd resistor, and the first end of the 3rd resistor is compared with the voltage
The output end of device connects, the second end ground connection of the 3rd resistor.
Optionally, the comparison circuit further includes first capacitor, one end of the first capacitor and the voltage comparator
Output end connection, the first capacitor the other end ground connection.
Optionally, the power positive end of the voltage comparator receives digital voltage signal, the power supply of the voltage comparator
Negativing ending grounding；The value of second dim signal of the high level of the voltage comparator output is equal to the power supply of the voltage comparator
The value of the value of the received digital voltage signal of anode, low level second dim signal of the voltage comparator output is 0.
To achieve the above object, the present invention also provides a kind of negative light adjusting circuits of direct current, are applied to display device, the direct current
Negative light adjusting circuit includes:
The input terminal of bleeder circuit, the bleeder circuit receives analog voltage signal；The bleeder circuit, be configured as by
It is exported after the analog voltage signal partial pressure；
Comparison circuit, the first input end of the comparison circuit are connect with the output end of the bleeder circuit, the comparison
Second input terminal of circuit and the output end of master chip connect, and the output end of the comparison circuit and the input terminal of backlight module connect
It connects；The comparison circuit is configured as being greater than second input terminal in the value of the voltage signal of first input end input
When the value of the first dim signal of input, the second dim signal of high level is exported to the backlight module；Wherein, described first
The level of dim signal is opposite with the level of second dim signal；
The comparison circuit is additionally configured to be less than described second in the value of the voltage signal of first input end input
When the value of the first dim signal of input terminal input, low level second dim signal is exported to the backlight module.
To achieve the above object, the present invention also provides a kind of display device, the display device includes institute any one of as above
The negative light adjusting circuit of the direct current stated.
Optionally, the display device further includes master chip and backlight module, the output end of the master chip with it is described
Second input terminal of the comparison circuit of the negative light adjusting circuit of direct current connects, the input terminal of the backlight module and the negative light modulation of the direct current
The output end of the comparison circuit of circuit connects.
Technical solution of the present invention, the second input terminal of the comparison circuit receive the first light modulation letter of master chip output
Number, the first input end of the comparison circuit receives the voltage signal of bleeder circuit output；In the first light modulation of master chip output
When signal is high, comparison circuit exports low level second dim signal to backlight module；In the first light modulation of master chip output
When signal is low, comparison circuit exports the second dim signal of high level to backlight module.By be arranged comparison circuit, output with
The second opposite dim signal of first dim signal level is to backlight module, to meet requirement of the system to the negative light modulation of direct current.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural block diagram of negative one embodiment of light adjusting circuit of direct current of the present invention；
Fig. 2 is the electrical block diagram of negative one embodiment of light adjusting circuit of direct current of the present invention.
Drawing reference numeral explanation:
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
The present invention proposes a kind of negative light adjusting circuit of direct current.
Referring to Fig.1, the negative light adjusting circuit of the direct current includes bleeder circuit 10 and comparison circuit 20, the bleeder circuit 10
Input terminal receive analog voltage signal, the first input end of the output end of the bleeder circuit 10 and the comparison circuit 20 connects
Connect, the second input terminal of the comparison circuit 20 is connect with the output end of master chip 30, the output end of the comparison circuit 30 with
The input terminal of backlight module connects.
The bleeder circuit 10 can be realized using multiple resistance series connection partial pressure；The bleeder circuit 10 is used for dispatch from foreign news agency
It exports after the analog voltage signal partial pressure that road provides to the first input end of comparison circuit 20.
The comparison circuit 20 can be realized using the circuit of comparator composition；Second input of the comparison circuit 20
End receives the first dim signal that master chip 30 exports.Wherein, the characteristic of comparison circuit 20 is, if the voltage of its first input end
Greater than the voltage of its second input terminal, comparison circuit 20 exports high level；If it is second defeated that the voltage of its first input end is less than it
Enter the voltage at end, comparison circuit 20 exports low level.
Wherein, first dim signal is the dim signal of square, and first dim signal includes high level
The first dim signal, such as the first dim signal and low level first dim signal of 5V, such as the first light modulation of 0V
Signal.The master chip, for exporting the first dim signal, the backlight module 40, for providing light source for display panel.
In the present embodiment, the input terminal of the bleeder circuit 10 receives external circuit, such as the analog voltage letter that power supply provides
Number, after bleeder circuit 10 divides the analog voltage signal, voltage signal after output partial pressure to the of comparison circuit 20
One input terminal.Wherein, by the circuit design of bleeder circuit 10, make the output of bleeder circuit 10 to the voltage signal of comparison circuit 20
Value be less than the high level that master chip 30 exports the first dim signal value, for example, if the high level that master chip 30 exports
First dim signal is 5V, then the analog voltage signal that external circuit provides exports after the partial pressure of bleeder circuit 10 to comparison circuit
The value of 20 voltage signal is less than 5V, for example, can be 2V.Second input terminal of comparison circuit 20 receives what master chip 30 exported
First dim signal, first dim signal are the dim signal of square.If the first light modulation letter that master chip 30 exports
It number is low level first dim signal, such as 0V, the value of low level first dim signal is less than the output of bleeder circuit 10
Voltage signal value, such as 2V, then comparison circuit 20 exports the second dim signal of high level to backlight module 40, for example,
The second dim signal of 3.3V is exported to backlight module 40, keeps backlight module 40 bright.If the first light modulation letter that master chip 30 exports
It number is the first dim signal of high level, such as 5V, the value of the first dim signal of the high level is greater than the output of bleeder circuit 10
Voltage signal value, then comparison circuit 20 exports low level second dim signal to backlight module 40, for example, output 0V
Second dim signal keeps backlight module 40 dark to backlight module 40.By the negative light adjusting circuit of direct current, so that master chip 30 exported
When first dim signal is high, be input to the second dim signal of backlight module 40 be it is low, backlight module 40 is dark；In master chip 30
When first dim signal of output is low, the second dim signal of backlight module 40 is input to as height, backlight module 40 is bright.
The technical solution of the present embodiment provides voltage letter by bleeder circuit 10 for the first input end of comparison circuit 20
Number, the second input terminal of the comparison circuit 20 receives the first dim signal that master chip 30 exports；It is exported in master chip 30
When first dim signal is high, comparison circuit 20 exports low level second dim signal to backlight module 40；In master chip 30
When first dim signal of output is low, comparison circuit 20 exports the second dim signal of high level to backlight module 40.Pass through
Bleeder circuit 10 and comparison circuit 20 are set, keep the level for the second dim signal for being input to backlight module 40 and master chip 30 defeated
The level of the first dim signal out is on the contrary, to meet requirement of the system to the negative light modulation of direct current.
In one embodiment, referring to Fig. 2, the bleeder circuit 10 includes first resistor R1 and second resistance R2, described
The first end of first resistor R1 is the input terminal of the bleeder circuit 10, and the second end of the first resistor R1 is the partial pressure electricity
The output end on road 10, and connect with the first end of the second resistance R2, the second end ground connection of the second resistance R2.
Specifically, first resistor R1 and second resistance R2 be using series connection partial pressure, according to the principle of partial pressure, first resistor R1 with
The ratio of second resistance R2 is bigger, and the voltage got on first resistor R1 is bigger, by adjusting first resistor R1 and second
The resistance value of resistance R2, the voltage swing of the adjustable first input end for being input to comparison circuit 20.
In one embodiment, referring to Fig. 2, the comparison circuit 20 includes voltage comparator U1, the voltage comparator U1
Positive input terminal be the comparison circuit 20 first input end, the negative input end of the voltage comparator U1 is that the comparison is electric
Second input terminal on road 20, the output end of the voltage comparator U1 are the output end of the comparison circuit 20.
The characteristic of voltage comparator U1 is, if the voltage of its positive input terminal is greater than the voltage of its negative input end, voltage compares
Device U1 exports high level；If the voltage of its positive input terminal is less than the voltage of its negative input end, voltage comparator U1 exports low level.
Specifically, the positive input terminal of the voltage comparator U1 receives the voltage signal that bleeder circuit 10 exports, such as 2V
Voltage signal, the negative input end of voltage comparator U1 receives the first dim signal that master chip 30 exports, voltage comparator U1
Power positive end receive digital voltage signal VDD, such as the digital voltage signal of 3.3V, the power supply negative terminal of voltage comparator U1 connect
Ground.
If the first dim signal that master chip 30 exports is low level, such as 0V, then the positive input terminal of voltage comparator U1
Voltage signal value be greater than its negative input end the first dim signal value, voltage comparator U1 export high level second dim
Signal is to backlight module 40, for example, the second dim signal of output 3.3V is to backlight module 40.Wherein, voltage comparator U1 is defeated
Power positive end received digital voltage signal VDD of the value of second dim signal of high level out equal to voltage comparator U1
Value, for example, the received digital voltage signal VDD of the power positive end of voltage comparator U1 is 3.3V, then the second light modulation of high level
The value of signal is also 3.3V.
If the first dim signal that master chip 30 exports is high level, such as 5V, then the positive input terminal of voltage comparator U1
Voltage signal value be less than its negative input end the first dim signal value, voltage comparator U1 export low level second dim
Signal is to backlight module 40, for example, the second dim signal of output 0V is to backlight module 40.Wherein, due to voltage comparator U1
Power supply negative terminal ground connection, therefore, voltage comparator U1 output low level second dim signal value be 0.
Wherein, the comparison circuit 20 further includes 3rd resistor R3, the first end of the 3rd resistor R3 and the voltage
The output end of comparator U1 connects, the second end ground connection of the 3rd resistor R3.The 3rd resistor R3 is pull down resistor, in electricity
When the second dim signal of comparator U1 output being pressed to be low, there is drop-down.
In one embodiment, referring to Fig. 2, the comparison circuit 20 further includes first capacitor C1, the first capacitor C1's
One end is connect with the output end of the voltage comparator U1, the other end ground connection of the first capacitor C1.
The first capacitor C1 has filter action, can be improved the stability of circuit.
The present invention also provides a kind of display device, the display device includes the negative light adjusting circuit of direct current, master chip and back
Optical mode group.
Referring to Fig.1, the negative light adjusting circuit of the direct current includes bleeder circuit 10 and comparison circuit 20, the bleeder circuit 10
Input terminal receive analog voltage signal, the first input end of the output end of the bleeder circuit 10 and the comparison circuit 20 connects
Connect, the second input terminal of the comparison circuit 20 is connect with the output end of master chip 30, the output end of the comparison circuit 30 with
The input terminal of backlight module connects.
In the present embodiment, the input terminal of the bleeder circuit 10 receives external circuit, such as the analog voltage letter that power supply provides
Number, after bleeder circuit 10 divides the analog voltage signal, voltage signal after output partial pressure to the of comparison circuit 20
One input terminal.Wherein, by the circuit design of bleeder circuit 10, make the output of bleeder circuit 10 to the voltage signal of comparison circuit 20
Value be less than the high level that master chip 30 exports the first dim signal value, for example, if the high level that master chip 30 exports
First dim signal is 5V, then the analog voltage signal that external circuit provides exports after the partial pressure of bleeder circuit 10 to comparison circuit
The value of 20 voltage signal is less than 5V, for example, can be 2V.Second input terminal of comparison circuit 20 receives what master chip 30 exported
First dim signal, first dim signal are the dim signal of square.If the first light modulation letter that master chip 30 exports
It number is low level first dim signal, such as 0V, the value of low level first dim signal is less than the output of bleeder circuit 10
Voltage signal value, such as 2V, then comparison circuit 20 exports the second dim signal of high level to backlight module 40, for example,
The second dim signal of 3.3V is exported to backlight module 40, keeps backlight module 40 bright.If the first light modulation letter that master chip 30 exports
It number is the first dim signal of high level, such as 5V, the value of the first dim signal of the high level is greater than the output of bleeder circuit 10
Voltage signal value, then comparison circuit 20 exports low level second dim signal to backlight module 40, for example, output 0V
Second dim signal keeps backlight module 40 dark to backlight module 40.By the negative light adjusting circuit of direct current, so that master chip 30 exported
When first dim signal is high, be input to the second dim signal of backlight module 40 be it is low, backlight module 40 is dark；In master chip 30
When first dim signal of output is low, the second dim signal of backlight module 40 is input to as height, backlight module 40 is bright.
In the present embodiment, display device can be television set, tablet computer, mobile phone etc. and fill with the display of display panel
It sets.
The foregoing is merely alternative embodiments of the invention, are not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (10)
1. a kind of negative light adjusting circuit of direct current, which is characterized in that the negative light adjusting circuit of direct current includes:
The input terminal of bleeder circuit, the bleeder circuit receives analog voltage signal；The bleeder circuit, being configured as will be described
It is exported after analog voltage signal partial pressure；
Comparison circuit, the first input end of the comparison circuit are connect with the output end of the bleeder circuit, the comparison circuit
The second input terminal and the output end of master chip connect, the input terminal of the output end of the comparison circuit and backlight module connects；
The comparison circuit is configured as inputting in the value of the voltage signal of first input end input greater than second input terminal
The first dim signal value when, export the second dim signal of high level to the backlight module；
The comparison circuit is additionally configured to be less than second input in the value of the voltage signal of first input end input
When holding the value of the first dim signal of input, low level second dim signal is exported to the backlight module.
2. the negative light adjusting circuit of direct current as described in claim 1, which is characterized in that the bleeder circuit include first resistor and
Second resistance, the first end of the first resistor are the input terminal of the bleeder circuit, and the second end of the first resistor is institute
The output end of bleeder circuit is stated, and is connect with the first end of the second resistance, the second end ground connection of the second resistance.
3. the negative light adjusting circuit of direct current as claimed in claim 2, which is characterized in that in the first light modulation letter of master chip output
When number being high level, the value of first dim signal is greater than the value of the voltage signal of bleeder circuit output.
4. the negative light adjusting circuit of direct current as described in claim 1, which is characterized in that the comparison circuit includes voltage comparator,
The positive input terminal of the voltage comparator is the first input end of the comparison circuit, and the negative input end of the voltage comparator is
Second input terminal of the comparison circuit, the output end of the voltage comparator are the output end of the comparison circuit.
5. the negative light adjusting circuit of direct current as claimed in claim 4, which is characterized in that the comparison circuit further includes 3rd resistor,
The first end of the 3rd resistor is connect with the output end of the voltage comparator, the second end ground connection of the 3rd resistor.
6. the negative light adjusting circuit of direct current as claimed in claim 5, which is characterized in that the comparison circuit further includes first capacitor,
One end of the first capacitor is connect with the output end of the voltage comparator, the other end ground connection of the first capacitor.
7. the negative light adjusting circuit of direct current as claimed in claim 6, which is characterized in that the power positive end of the voltage comparator receives
Digital voltage signal, the power supply negative terminal ground connection of the voltage comparator；The second of the high level of the voltage comparator output is adjusted
The value of optical signal is equal to the value of the received digital voltage signal of power positive end of the voltage comparator, and the voltage comparator is defeated
The value of low level second dim signal out is 0.
8. a kind of negative light adjusting circuit of direct current, it is applied to display device, which is characterized in that the negative light adjusting circuit of direct current includes:
The input terminal of bleeder circuit, the bleeder circuit receives analog voltage signal；The bleeder circuit, being configured as will be described
It is exported after analog voltage signal partial pressure；
Comparison circuit, the first input end of the comparison circuit are connect with the output end of the bleeder circuit, the comparison circuit
The second input terminal and the output end of master chip connect, the input terminal of the output end of the comparison circuit and backlight module connects；
The comparison circuit is configured as inputting in the value of the voltage signal of first input end input greater than second input terminal
The first dim signal value when, export the second dim signal of high level to the backlight module；Wherein, first light modulation
The level of signal is opposite with the level of second dim signal；
The comparison circuit is additionally configured to be less than second input in the value of the voltage signal of first input end input
When holding the value of the first dim signal of input, low level second dim signal is exported to the backlight module.
9. a kind of display device, which is characterized in that the display device includes direct current as claimed in any one of claims 1 to 8
Negative light adjusting circuit.
10. display device as claimed in claim 9, which is characterized in that the display device further includes master chip and backlight
Mould group, the output end of the master chip are connect with the second input terminal of the comparison circuit of the negative light adjusting circuit of the direct current, the back
The input terminal of optical mode group is connect with the output end of the comparison circuit of the negative light adjusting circuit of the direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509009.8A CN110267396B (en) | 2019-06-11 | 2019-06-11 | Direct current negative dimming circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509009.8A CN110267396B (en) | 2019-06-11 | 2019-06-11 | Direct current negative dimming circuit and display device |
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| Publication Number | Publication Date |
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| CN110267396A true CN110267396A (en) | 2019-09-20 |
| CN110267396B CN110267396B (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910509009.8A Active CN110267396B (en) | 2019-06-11 | 2019-06-11 | Direct current negative dimming circuit and display device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101784151A (en) * | 2009-01-16 | 2010-07-21 | 国琏电子（上海）有限公司 | Light source driving device |
| CN203492241U (en) * | 2013-09-29 | 2014-03-19 | 郑州创亿达照明有限公司 | Novel LED dimming module |
| CN206210352U (en) * | 2016-10-28 | 2017-05-31 | 合肥惠科金扬科技有限公司 | A kind of PWM adjusting control circuits and display device |
| CN106710533B (en) * | 2017-02-21 | 2018-06-29 | 深圳市华星光电技术有限公司 | A kind of direct current bears light adjusting circuit and liquid crystal display |
| CN108366448A (en) * | 2018-01-12 | 2018-08-03 | 深圳市崧盛电子股份有限公司 | One kind can just can negative logic LED light adjusting circuits and driving power |
-
2019
- 2019-06-11 CN CN201910509009.8A patent/CN110267396B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101784151A (en) * | 2009-01-16 | 2010-07-21 | 国琏电子（上海）有限公司 | Light source driving device |
| CN203492241U (en) * | 2013-09-29 | 2014-03-19 | 郑州创亿达照明有限公司 | Novel LED dimming module |
| CN206210352U (en) * | 2016-10-28 | 2017-05-31 | 合肥惠科金扬科技有限公司 | A kind of PWM adjusting control circuits and display device |
| CN106710533B (en) * | 2017-02-21 | 2018-06-29 | 深圳市华星光电技术有限公司 | A kind of direct current bears light adjusting circuit and liquid crystal display |
| CN108366448A (en) * | 2018-01-12 | 2018-08-03 | 深圳市崧盛电子股份有限公司 | One kind can just can negative logic LED light adjusting circuits and driving power |
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| CN110267396B (en) | 2021-10-01 |
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