CN206097871U - LCD backlight drive device and mobile terminal - Google Patents
LCD backlight drive device and mobile terminal Download PDFInfo
- Publication number
- CN206097871U CN206097871U CN201621068283.4U CN201621068283U CN206097871U CN 206097871 U CN206097871 U CN 206097871U CN 201621068283 U CN201621068283 U CN 201621068283U CN 206097871 U CN206097871 U CN 206097871U
- Authority
- CN
- China
- Prior art keywords
- backlight
- drive circuit
- led light
- cpu
- backlight driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Liquid Crystal Display Device Control (AREA)
Abstract
The utility model discloses a LCD backlight drive device and mobile terminal, LCD backlight drive device connect CPU, including setting up a plurality of drive circuit in a poor light and the FPC board of setting in the LCD module on the mainboard, be provided with on the FPC board predetermineeing the separately a plurality of LED banks of combination of a LED lamp, a LED banks corresponds with a drive circuit in a poor light and is connected, and drive circuit connection CPU is shaded, drive circuit respectively in a poor light still controls electric current increase or the recovering initial value that corresponds the LED banks according to the flash of light enable signal who exports according to the bright state of going out of the corresponding LED banks of enable signal in a poor light control of CPU output. LED lamp of predetermineeing through having now falls into a plurality of groups, is equivalent to and reduces the backlight number that the driving voltage that every LED banks needs also reduces, makes the efficiency of circuit rise. The problem of current LCD be shaded and take the photograph output voltage increase when dodging the light filling function before doing, but the efficiency of circuit reduces is solved.
Description
Technical field
This utility model is related to LCD backlight technical field, more particularly to a kind of LCD backlight driving means and movement are eventually
End.
Background technology
It is with user's auto heterodyne Requirement Increasess, proactive（Front-facing camera）Increase sudden strain of a muscle light filling function and be increasingly becoming a kind of new sending out
Exhibition trend.It is a kind of feasible program as proactive flash light compensation by the use of LCD (Liquid Crystal Display) backlight,
Take pictures moment proactive, LCD backlight brightness is brought up to into a higher grade, the effect of light filling is played.
In order to realize that LCD backlight can bring up to higher grade, backlight drive circuit is needed to export bigger power.Often
The backlight drive circuit of rule can drive 10 to 14 LED lamps, and the maximum current per LED lamp is 20mA.To realize that LCD is carried on the back
Light does proactive sudden strain of a muscle light filling function, and the electric current of every lamp is brought up to 40mA to 60mA by needs.Because output improves 2 to 3
Times, then backlight drive circuit is put forward higher requirement, such as output voltage needs increase, output to increase, but circuit
Efficiency is reduced；Some devices（Such as power inductance, diode）Type selecting because current boost, make cost and volume increase.
Thus prior art could be improved and improve.
Utility model content
In view of in place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of LCD backlight to drive dress
Put and mobile terminal, to solve output voltage increase when existing LCD backlight does proactive sudden strain of a muscle light filling function, but the efficiency of circuit is reduced
Problem.
In order to achieve the above object, this utility model takes technical scheme below：
A kind of LCD backlight driving means, connect CPU, and which includes：
Several backlight drive circuits being arranged on mainboard and the FPC plates being arranged in LCD modules, on the FPC plates
Several LED light groups that default LED lamp is separately combined are provided with, a LED light group is corresponding with a backlight drive circuit to be connected,
Backlight drive circuit connects CPU；
Each backlight drive circuit enables the light on and off state of signal control correspondence LED light group according to the backlight that CPU is exported, and goes back root
The electric current increase of signal control correspondence LED light group is enabled according to the flash of light that CPU is exported or recovers initial value.
In described LCD backlight driving means, the first backlight drive circuit is provided with the mainboard and the second backlight is driven
Galvanic electricity road, is provided with first LED light group and the second LED light group of default LED lamp equal subassembly on the FPC plates；
First backlight drive circuit enables the light on and off shape that signal controls the first LED light group according to the backlight that CPU is exported
State, the flash of light always according to CPU outputs enable the electric current increase of signal the first LED light group of control or recover initial value；
Second backlight drive circuit enables the light on and off state that signal controls the second LED light group according to the backlight, also
Electric current increase or the recovery initial value that signal controls the second LED light group is enabled according to the flash of light；
First backlight drive circuit connects the first LED light group, and the second backlight drive circuit connects the second LED light group；
First backlight drive circuit and the second backlight drive circuit are all connected with CPU.
In described LCD backlight driving means, first backlight drive circuit include the first backlight driving chip, first
Inductance, the first diode, first resistor, second resistance and the first metal-oxide-semiconductor；
The Vin feet of first backlight driving chip connect one end of the first inductance and power end, the first backlight drive core
The LX feet of piece connect the positive pole of the other end and the first diode of the first inductance, and the negative pole of the first diode connects the first LED
The positive pole of group, the EN feet of the first backlight driving chip connect the second backlight drive circuit and CPU；The FB of the first backlight driving chip
Foot connects one end of the negative pole, one end of first resistor and second resistance of the first LED light group, the other end connection the of first resistor
The source electrode and ground of one metal-oxide-semiconductor, the other end of second resistance connect the drain electrode of the first metal-oxide-semiconductor, the grid connection second of the first metal-oxide-semiconductor
Backlight drive circuit and CPU.
In described LCD backlight driving means, first metal-oxide-semiconductor is NMOS tube, and the first diode is isolating diode,
Model KTD257M of the first backlight driving chip.
In described LCD backlight driving means, first backlight drive circuit also includes the first electric capacity and the second electric capacity；
One end of first electric capacity connects one end of the first inductance and power end, and the other end of the first electric capacity is grounded, the second electric capacity
One end connects the positive pole of the negative pole and the first LED light group of the first diode, the other end ground connection of the second electric capacity.
In described LCD backlight driving means, second backlight drive circuit include the second backlight driving chip, second
Inductance, the second diode, 3rd resistor, the 4th resistance and the second metal-oxide-semiconductor；
The Vin feet of second backlight driving chip connect one end of the second inductance and power end, the second backlight drive core
The LX feet of piece connect the positive pole of the other end and the second diode of the second inductance, and the negative pole of the second diode connects the second LED
The positive pole of group, the EN feet of the second backlight driving chip connect the EN feet and CPU of the first backlight driving chip；Second backlight drive core
The FB feet of piece connect one end of the negative pole, one end of 3rd resistor and the 4th resistance of the second LED light group, the other end of 3rd resistor
Connect the source electrode and ground of the second metal-oxide-semiconductor, the other end of the 4th resistance connects the drain electrode of the second metal-oxide-semiconductor, and the grid of the second metal-oxide-semiconductor connects
Connect the grid and CPU of the first metal-oxide-semiconductor.
In described LCD backlight driving means, second metal-oxide-semiconductor is NMOS tube, and the second diode is isolating diode,
Model KTD257M of the second backlight driving chip.
In described LCD backlight driving means, second backlight drive circuit also includes the 3rd electric capacity and the 4th electric capacity；
One end of 3rd electric capacity connects one end of the second inductance and power end, and the other end of the 3rd electric capacity is grounded, the 4th electric capacity
One end connects the positive pole of the negative pole and the second LED light group of the second diode, the other end ground connection of the 4th electric capacity.
In described LCD backlight driving means, the specification of first inductance and the second inductance is 10uH 1A, the one or two
The specification of pole pipe and the second diode is IF 1A；The specification of the second electric capacity and the 4th electric capacity is 10uF 25V.
A kind of mobile terminal, including CPU, which also includes described LCD backlight driving means, and the CPU connects LCD backlight
Driving means：
The CPU outputs backlight enables the backlight state that signal controls LCD backlight driving means；Drive in LCD backlight and fill
Put when carrying out backlight luminescence, CPU also exports flash of light and enables signal control back facet current increase or recover initial value.
Compared to prior art, LCD backlight driving means and mobile terminal that this utility model is provided, by will be existing
The default LED lamp of series connection is divided into some groups in LCD modules, increases for drawing the anode and negative electrode of LED light group on FPC plates
Wire, the anode of a LED light group and negative electrode connect a backlight drive circuit.Equivalent to by existing series connection after being so grouped
Backlight number reduce, then corresponding each LED light group required voltage is also reduced, and raises the efficiency of circuit.In output
In the case of equal-wattage, improve can output current correspondence, it is easy to reach the proactive current requirements for dodging light filling.
Description of the drawings
Fig. 1 is the structured flowchart of the mobile terminal that this utility model is provided.
Fig. 2 is the circuit diagram of the LCD backlight driving means that this utility model is provided.
Fig. 3 is efficiency comparative's figure of the LCD backlight driving means that this utility model is provided.
Specific embodiment
This utility model provides a kind of LCD backlight driving means and mobile terminal, can reach raising driving force, reduce setting
The effect of meter difficulty.To make the purpose of this utility model, technical scheme and advantage clearer, clear and definite, referring to the drawings simultaneously
This utility model is further described for embodiment.It should be appreciated that specific embodiment described herein is only to explain
This utility model, is not used to limit this utility model.
Fig. 1 is referred to, the LCD backlight driving means that this utility model is provided include several backlights being arranged on mainboard
Drive circuit and the FPC being arranged in LCD modules（Flexible Printed Circuit, FPC or flexible circuit
Plate）Plate 30, is provided with default LED lamp on the FPC plates 30（The i.e. existing LED string for being connected into a string）Separately combine
Several LED light groups, a LED light group it is corresponding with a backlight drive circuit connection.The back of the body of each backlight drive circuit according to input
Light enables signal BL（Exported by CPU）The light on and off state of control correspondence LED light group.Sudden strain of a muscle of each backlight drive circuit always according to input
Light enables the electric current increase of signal FL control correspondence LED light groups or recovers initial value.
By the LED backlight connected in existing LCD modules is divided into some groups, increase on FPC plates for drawing LED
The wire of the anode and negative electrode of lamp group, the anode of a LED light group and negative electrode connect a backlight drive circuit.After being so grouped
Reduce equivalent to the backlight number by existing series connection, then corresponding each LED light group required voltage is also reduced, and makes circuit
Efficiency is raised.In the case of output equal-wattage, the present embodiment improves can output current correspondence, it is easy to reach proactive sudden strain of a muscle
The current requirements of light filling.
In the preferred embodiment, some groups is to be provided with the first backlight drive circuit 10 and the second backlight on 2 groups, i.e. mainboard
Drive circuit 20, is provided with first LED light group 310 and the 2nd LED of default LED lamp equal subassembly on the FPC plates 30
Lamp group 320.That is the LED number of the first LED light group 310 is the half of default, the LED number of the second LED light group 320 with
First LED light group 310 is equal.It is divided into 2 groups for preferred embodiment, if being divided into 3 groups or 4 groups, effectively can not be carried in performance
Rise, cost increases too many.First backlight drive circuit 10 connects the first LED light group 310, and the second backlight drive circuit 20 connects
Connect the second LED light group 320.First backlight drive circuit 10 enables signal BL according to the backlight of input（Exported by CPU）Control
The light on and off state of the first LED light group 310 is made, the flash of light always according to input enables the electric current that signal FL controls the first LED light group 310
Increase recovers initial value.Second backlight drive circuit 20 enables signal BL according to the backlight of input（Exported by CPU）Control
The light on and off state of the second LED light group 320, the flash of light always according to input enable signal FL（Exported by CPU）Control the second LED light group
320 electric current increase recovers initial value.
Fig. 2 is seen also, first backlight drive circuit 10 includes the first backlight driving chip IC1, the first inductance
L1, the first diode D1, first resistor R1, second resistance R2 and the first metal-oxide-semiconductor Q1；First backlight driving chip IC1
Vin feet connect one end of the first inductance L1 and power end Vcc, and the LX feet of the first backlight driving chip IC1 connect the first inductance L1
The other end and the first diode D1 positive pole, the negative pole of the first diode D1 connects the positive pole of the first LED light group 310, first
The EN feet of backlight driving chip IC1 connect the second backlight drive circuit 20 and CPU；The FB feet of the first backlight driving chip IC1 connect
Connect one end of the negative pole, one end of first resistor R1 and second resistance R2 of the first LED light group 310, the other end of first resistor R1
Connect the source electrode and ground of the first metal-oxide-semiconductor Q1, the other end of second resistance R2 connects the drain electrode of the first metal-oxide-semiconductor Q1, the first metal-oxide-semiconductor Q1
Grid connect the second backlight drive circuit 20 and CPU.
Wherein, the first metal-oxide-semiconductor Q1 be NMOS tube, the first diode D1 be isolating diode, the first backlight driving chip IC1
Model KTD257M.Power end Vcc connects the positive pole of battery, i.e. battery is powered to the first backlight driving chip IC1.CPU is defeated
The backlight that goes out enables the keying that signal BL controls the first backlight driving chip IC1, and such as backlight enables when signal BL is high level the
One backlight driving chip IC1 opens work, and cell voltage boosting outputting drive voltage Vout is lighted the first LED light group 310；When
When backlight enable signal BL is low level, the first backlight driving chip IC1 does not work, and 310 dead electricity of the first LED light group is extinguished.The
The FB feet of one backlight driving chip IC1 are feedback detection foot, for detecting and feeding back the feedback electricity of 310 negative pole of the first LED light group
Press and flow through the electric current of the first LED light group 310.The grid input flash of light of the first metal-oxide-semiconductor Q1 enables signal FL, when backlight circuit is made
When using for common LCD backlight, i.e., when backlight enable signal BL is high level, flash of light enables signal FL for low level, a MOS
Pipe Q1 disconnects, and electric current only passes through first resistor R1；When needing to use flash function, it is high level and sudden strain of a muscle that backlight enables signal BL
Light enables signal FL for high level, the first metal-oxide-semiconductor Q1 conductings, and now first resistor R1 and second resistance R2 are in parallel, and impedance diminishes,
The increase of the first LED light group 310 because driving voltage Vout is constant, is then flow through, motor current during so as to having reached proactive sudden strain of a muscle light filling
Purpose.
In further embodiment, first backlight drive circuit 10 is also included for filtering the power supply noise of cell voltage
The first electric capacity C1 and the second electric capacity C2 for being filtered to driving voltage Vout；One end connection of the first electric capacity C1
One end of first inductance L1 and power end Vcc, the other end ground connection of the first electric capacity C1, one end connection the one or two of the second electric capacity C2
The positive pole of the negative pole of pole pipe D1 and the first LED light group 310, the other end ground connection of the second electric capacity C2.
Please continue to refer to Fig. 2, second backlight drive circuit 20 includes the second backlight driving chip IC2, the second inductance
L2, the second diode D2,3rd resistor R3, the 4th resistance R4 and the second metal-oxide-semiconductor Q2；Second backlight driving chip IC2
Vin feet connect one end of the second inductance L2 and power end Vcc, and the LX feet of the second backlight driving chip IC2 connect the second inductance L2
The other end and the second diode D2 positive pole, the negative pole of the second diode D2 connects the positive pole of the second LED light group 320, second
The EN feet of backlight driving chip IC2 connect the EN feet and CPU of the first backlight driving chip IC1；Second backlight driving chip IC2
FB feet connect one end of the negative pole, one end of 3rd resistor R3 and the 4th resistance R4 of the second LED light group 320,3rd resistor R3
The source electrode and ground of the other end the second metal-oxide-semiconductor Q2 of connection, the drain electrode of the other end second metal-oxide-semiconductor Q2 of connection of the 4th resistance R4, second
The grid of metal-oxide-semiconductor Q2 connects the grid and CPU of the first metal-oxide-semiconductor Q1.
In further embodiment, second backlight drive circuit 20 is also included for filtering the power supply noise of cell voltage
The 3rd electric capacity C3 and the 4th electric capacity C4 for being filtered to driving voltage Vout；One end connection of the 3rd electric capacity C3
One end of second inductance L2 and power end Vcc, the other end ground connection of the 3rd electric capacity C3, one end connection the two or two of the 4th electric capacity C4
The positive pole of the negative pole of pole pipe D2 and the second LED light group 320, the other end ground connection of the 4th electric capacity C4.
It is to be appreciated that the circuit structure of the second backlight drive circuit 20, type of device and operation principle and first back of the body
Light drive circuit 10 is identical, does not repeat herein.
The default LED lamp that the present embodiment will be connected in existing LCD modules（Such as 10 ~ 14）2 groups are divided into, in FPC plates
The wire of the upper anode and negative electrode for drawing this 2 groups of LED light groups respectively is simultaneously connected to corresponding backlight drive circuit.So divide 2 groups
Afterwards equivalent to existing backlight number is halved, output voltage also halves.Backlight drive circuit exports the situation of equal-wattage
Under, output current can be doubled, that is, reach 40mA requirements, if necessary to 60mA, it is only necessary to slightly improve inductance and diode
Specification 1.5 can reach again, such as use custom circuit, need to improve 3 times of specification.
In other words, the present embodiment is compared with traditional backlight drive circuit, although increased a backlight drive circuit, but
Because the electrical property specification requirement to inductance and diode is reduced, no inferior position in cost and cloth plate suqare is made |（Do not increase
Addition sheet and volume）.For example, to meet 40mA current needs, inductance specification needs to be set to 10uH traditional backlight drive circuit
2A, diode specification need to be set to IF 2A, and two electric capacity specifications are 10uF 50V；This kind of device current specification is this enforcement
2 times of example, and and unconventional materials, device volume is larger, relatively costly.And the packet of default LED lamp is made which by the present embodiment
Quantity halves, and reduces output voltage, can reduce the specification of above-mentioned device, such as the specification of the first inductance L1 and the second inductance L2
Specification for 10uH 1A, the first diode D1 and the second diode D2 is IF 1A；The rule of the second electric capacity C2 and the 4th electric capacity C4
Lattice are 10uF 25V.The reduction of specification is cost-saved and reduces device volume, and in the case of same current, backlight drive
The efficiency of circuit also compared to existing technology high voltage when it is higher, reach save power consumption effect.
The efficiency comparative of backlight drive circuit is as shown in Figure 3.X-axis in Fig. 3（Transverse axis）For the input voltage of power end Vcc
（V）, Y-axis（Vertical pivot）For efficiency（%）, the line in figure represents the efficiency and input voltage of the LED of the different number of LED light group series connection
Relation.4LED represents that LED light group has the LED of 4 series connection, and Vout=13 represents 4LED, the electric current of LED light group is 20mA, electric
Driving voltage Vout in the case of feeling for 22uH is 13V.As can be drawn from Figure 3, compared with 8 lamps, efficiency is obvious for 4 lamps
Lifted.
Based on above-mentioned LCD backlight driving means, this utility model also provides a kind of mobile terminal, as shown in figure 1, mobile
Terminal includes above-mentioned LCD backlight driving means and CPU.The CPU connects LCD backlight driving means, and CPU output backlights enable letter
Number BL controls the backlight state of LCD backlight driving means；When LCD backlight driving means carry out backlight luminescence, CPU also exports sudden strain of a muscle
Light enables signal FL control back facet current increases or recovers initial value.In the present embodiment, mobile terminal is preferably mobile phone, and LCD backlight drives
It is 10 ~ 14 that LED lamp is preset in dynamic device, then be respectively 5 ~ 7 after being divided into 2 groups.In the specific implementation, mobile terminal may be used also
The electronic product of LCD modules, such as panel computer, then a number correspondence change of its default LED lamp are adopted for other.
In sum, LCD backlight driving means of the present utility model and mobile terminal, by will go here and there in existing LCD modules
The LED backlight of connection is divided into 2 groups, increases for drawing the wire of the anode and negative electrode of LED light group, a LED on FPC plates
The anode and negative electrode of group connects a backlight drive circuit；The specification of the devices such as inductance, diode and electric capacity is reduced simultaneously.This
The backlight number of existing series connection is halved by sample, and the driving voltage that each LED light group needs also halves, then the efficiency of circuit becomes
Greatly.In the case of output equal-wattage, improve can output current correspondence, it is easy to which reaching the proactive electric current for dodging light filling will
Ask.The reduction of specification is cost-saved and reduces device volume, and in the case of same current, the efficiency of backlight drive circuit
Also compared to existing technology high voltage when it is higher, reach save power consumption effect.
It should be appreciated that application of the present utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come
Say, can be improved according to the above description or be converted, all these modifications and variations should all belong to the appended power of this utility model
The protection domain that profit is required.
Claims (10)
1. a kind of LCD backlight driving means, connect CPU, it is characterised in that include：
Several backlight drive circuits being arranged on mainboard and the FPC plates being arranged in LCD modules, are arranged on the FPC plates
There are several LED light groups that default LED lamp is separately combined, LED light group connection corresponding with a backlight drive circuit, backlight
Drive circuit connects CPU；
Each backlight drive circuit enables the light on and off state of signal control correspondence LED light group according to the backlight that CPU is exported, always according to
The flash of light of CPU outputs enables the electric current increase of signal control correspondence LED light group or recovers initial value.
2. LCD backlight driving means according to claim 1, it is characterised in that the first backlight is provided with the mainboard
Drive circuit and the second backlight drive circuit, are provided with the first LED of default LED lamp equal subassembly on the FPC plates
Group and the second LED light group；
First backlight drive circuit enables the light on and off state that signal controls the first LED light group according to the backlight that CPU is exported, also
The electric current increase of signal the first LED light group of control is enabled according to the flash of light of CPU outputs or recovers initial value；
Second backlight drive circuit enables the light on and off state that signal controls the second LED light group according to the backlight, always according to
The flash of light enables signal and controls the electric current increase of the second LED light group or recover initial value；
First backlight drive circuit connects the first LED light group, and the second backlight drive circuit connects the second LED light group；First
Backlight drive circuit and the second backlight drive circuit are all connected with CPU.
3. LCD backlight driving means according to claim 2, it is characterised in that first backlight drive circuit includes
First backlight driving chip, the first inductance, the first diode, first resistor, second resistance and the first metal-oxide-semiconductor；
The Vin feet of first backlight driving chip connect one end of the first inductance and power end, the first backlight driving chip
LX feet connect the positive pole of the other end and the first diode of the first inductance, and the negative pole of the first diode connects the first LED light group
Positive pole, the EN feet of the first backlight driving chip connect the second backlight drive circuit and CPU；The FB feet of the first backlight driving chip connect
Connect one end of the negative pole of the first LED light group, one end of first resistor and second resistance, the other end connection first of first resistor
The source electrode and ground of metal-oxide-semiconductor, the other end of second resistance connect the drain electrode of the first metal-oxide-semiconductor, and the grid connection second of the first metal-oxide-semiconductor is carried on the back
Light drive circuit and CPU.
4. LCD backlight driving means according to claim 3, it is characterised in that first metal-oxide-semiconductor is NMOS tube, the
One diode be isolating diode, model KTD257M of the first backlight driving chip.
5. LCD backlight driving means according to claim 3, it is characterised in that first backlight drive circuit is also wrapped
Include the first electric capacity and the second electric capacity；One end of first electric capacity connects one end of the first inductance and power end, the first electric capacity
The other end is grounded, and one end of the second electric capacity connects the positive pole of the negative pole and the first LED light group of the first diode, the second electric capacity it is another
One end is grounded.
6. LCD backlight driving means according to claim 5, it is characterised in that second backlight drive circuit includes
Second backlight driving chip, the second inductance, the second diode, 3rd resistor, the 4th resistance and the second metal-oxide-semiconductor；
The Vin feet of second backlight driving chip connect one end of the second inductance and power end, the second backlight driving chip
LX feet connect the positive pole of the other end and the second diode of the second inductance, and the negative pole of the second diode connects the second LED light group
Positive pole, the EN feet of the second backlight driving chip connect the EN feet and CPU of the first backlight driving chip；Second backlight driving chip
FB feet connect one end of the negative pole, one end of 3rd resistor and the 4th resistance of the second LED light group, the other end connection of 3rd resistor
The source electrode of the second metal-oxide-semiconductor and ground, the other end of the 4th resistance connect the drain electrode of the second metal-oxide-semiconductor, the grid connection of the second metal-oxide-semiconductor the
The grid and CPU of one metal-oxide-semiconductor.
7. LCD backlight driving means according to claim 6, it is characterised in that second metal-oxide-semiconductor is NMOS tube, the
Two diodes be isolating diode, model KTD257M of the second backlight driving chip.
8. LCD backlight driving means according to claim 6, it is characterised in that second backlight drive circuit is also wrapped
Include the 3rd electric capacity and the 4th electric capacity；One end of 3rd electric capacity connects one end of the second inductance and power end, the 3rd electric capacity
The other end is grounded, and one end of the 4th electric capacity connects the positive pole of the negative pole and the second LED light group of the second diode, the 4th electric capacity it is another
One end is grounded.
9. LCD backlight driving means according to claim 8, it is characterised in that first inductance and the second inductance
Specification is IF 1A for the specification of 10uH 1A, the first diode and the second diode；The specification of the second electric capacity and the 4th electric capacity is
10uF 25V。
10. a kind of mobile terminal, including CPU, it is characterised in that also include the LCD backlight as described in any one of claim 1-9
Driving means, the CPU connect LCD backlight driving means：
The CPU outputs backlight enables the backlight state that signal controls LCD backlight driving means；Enter in LCD backlight driving means
During row backlight luminescence, CPU also exports flash of light and enables signal control back facet current increase or recover initial value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621068283.4U CN206097871U (en) | 2016-09-21 | 2016-09-21 | LCD backlight drive device and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621068283.4U CN206097871U (en) | 2016-09-21 | 2016-09-21 | LCD backlight drive device and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206097871U true CN206097871U (en) | 2017-04-12 |
Family
ID=58479214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621068283.4U Expired - Fee Related CN206097871U (en) | 2016-09-21 | 2016-09-21 | LCD backlight drive device and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206097871U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114255709A (en) * | 2020-09-25 | 2022-03-29 | 京东方科技集团股份有限公司 | Backlight circuit, driving method thereof, display panel and display device |
-
2016
- 2016-09-21 CN CN201621068283.4U patent/CN206097871U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114255709A (en) * | 2020-09-25 | 2022-03-29 | 京东方科技集团股份有限公司 | Backlight circuit, driving method thereof, display panel and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102682721B (en) | Light emitting diode (LED) backlight system and display device | |
| CN202549254U (en) | Drive circuit for high-power LED (Light Emitting Diode) backlight source | |
| CN102647170B (en) | Grid high voltage generator and display module | |
| CN102622986A (en) | Light emitting diode (LED) backlight drive circuit, backlight module, and liquid crystal display device | |
| CN107086026A (en) | A kind of constant-current circuit and television set of driving LED backlight | |
| CN105845091B (en) | A kind of backlight drive circuit and terminal device | |
| CN102013233B (en) | Backlight circuit control method, backlight circuit and booster circuit | |
| CN206097871U (en) | LCD backlight drive device and mobile terminal | |
| CN104966494A (en) | LED driving circuit for display screen back lighting | |
| CN102376273B (en) | LED (Light Emitting Diode) backlight driving device | |
| CN208111043U (en) | Switching circuit and backlight drive circuit | |
| CN206379158U (en) | A kind of LED backlight drive circuit | |
| CN102354483A (en) | LED (Light Emitting Diode) backlight-source boosting driving circuit, LED backlight source and liquid crystal display device | |
| CN208834723U (en) | Multi-channel LED backlight drive circuit and LCD TV | |
| CN207217083U (en) | A kind of backlight regulation protection circuit, liquid crystal display die set and electric terminal | |
| CN115035867B (en) | Backlight driving circuit and method, backlight module and display device | |
| CN103354083B (en) | Backlight drive circuit and display device | |
| CN103648216B (en) | A kind of Intelligent constant flow drives the method for great power LED | |
| CN107633811A (en) | A kind of SCM Based OLED static state displays drive device | |
| CN205451749U (en) | Backlight drive circuit and television | |
| CN101964176A (en) | Backlight LED driving chip and TD terminal | |
| CN106782349A (en) | A kind of LED backlight drive circuit and liquid crystal display | |
| CN104602396B (en) | WLED (White Light Emitting Diode) driver and driving control method thereof | |
| CN202759649U (en) | LED lamp tube rectifier and filter circuit and constant-current LED lamp tube circuit | |
| CN207835853U (en) | A kind of flash lamp module and terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20170921 |