CN106328072A - Backlight intensity circuit and display device thereof - Google Patents
Backlight intensity circuit and display device thereof Download PDFInfo
- Publication number
- CN106328072A CN106328072A CN201610948857.5A CN201610948857A CN106328072A CN 106328072 A CN106328072 A CN 106328072A CN 201610948857 A CN201610948857 A CN 201610948857A CN 106328072 A CN106328072 A CN 106328072A
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- control module
- backlight
- integrated chip
- divider resistance
- voltage stabilizing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention, applicable for the backlight control field, provides a backlight intensity circuit and a display device thereof. Backlight intensity circuit comprises a current control module, a power supply module, a feedback resistance and an intensity control modules. In the invention embodiment, the intensity control module of backlight intensity circuit contains multiple photoperiod control branches, wherein each photoperiod control branch comprises series resistance and electronic switches, and each photoperiod control branch is grounding with feedback resistance in series, by controlling the on-off of electronic switches, the value of feedback resistance can be changed, so that to control current of flowing past the backlight, and reach the purpose of controlling backlight intensity, besides, the backlight intensity circuit has the advantages of simple structure and low cost.
Description
Technical field
The invention belongs to backlight control field, particularly relate to a kind of back light source brightness control circuit and display device.
Background technology
Backlight is in liquid crystal display a kind of light source behind, and its illumination effect will directly influence liquid crystal display
Module visual effect.
At present, commonly used pwm pulse pattern carries out brightness adjustment control, and it has, and efficiency is high, unit power volume is little, weight
The advantage such as light, but it needs the device such as single-chip microcomputer or pulse generation gas, so circuit structure is complicated, cost height.
Summary of the invention
It is an object of the invention to provide a kind of back light source brightness control circuit, it is intended to solve present back light source brightness control
There is the problem that circuit structure is complicated, cost is high in circuit processed.
The present invention is achieved in that a kind of back light source brightness control circuit, is connected with backlight, described back light source brightness
Control circuit includes:
Current control module, its output terminates described backlight, for exporting constant-voltage power supply to backlight；
Power control module, it inputs termination power, the input of the output described current control module of termination and Enable Pin, is used for
Control the break-make that current control module is powered by power supply；
The described power supply of commonly connected termination of feedback resistance, ground connection of connecting with described backlight, described feedback resistance and backlight
The feedback end of control module, described feedback resistance is used for the current feedback by flowing through described backlight to described electricity flow control module
Block；And
The brightness control module being connected with the public connecting end of described feedback resistance and backlight, for flowing through backlight by control
The electric current in source, controls the brightness of backlight, and described brightness control module includes:
Multiple control light branch roads being formed in parallel, described each control light prop up route one resistance and electrical switch be in series, described often
Individual control light branch road all with feedback resistance earth.
Another object of the present invention is to provide a kind of display device including back light source brightness control circuit.
In the present invention, the brightness control module of back light source brightness control circuit includes multiple control light branch road, each control light
Branch road include series connection resistance and electrical switch, each control light branch road all with feedback resistance earth, by control electronic cutting
The break-make closed, thus it is possible to vary the resistance of feedback resistance, thus control to flow through the electric current of backlight, reach to control back light source brightness
Purpose, the advantage that this back light source brightness control circuit has simple in construction, low cost.
Accompanying drawing explanation
Fig. 1 is the module map of the back light source brightness control circuit that the embodiment of the present invention provides；
Fig. 2 is the circuit structure diagram of the back light source brightness control circuit that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows the modular structure of the back light source brightness control circuit that the embodiment of the present invention provides, for convenience of description,
Illustrate only the part relevant to the embodiment of the present invention, details are as follows.
Back light source brightness control circuit, is connected with backlight, and back light source brightness control circuit includes power control module
100, current control module 200, brightness control module 300 and feedback resistance R7.
The output termination backlight of current control module 200, for exporting constant-voltage power supply to backlight；
The input termination power of power control module 100, the input of output termination current control module 200 and Enable Pin, use
In controlling the break-make that current control module 200 is powered by power supply；
Feedback resistance R7 connects with backlight ground connection, the commonly connected termination power control module of feedback resistance R7 and backlight
The feedback end of 200, feedback resistance R7 is for flowing through the current feedback of backlight to current control module 200；
Brightness control module 300 is connected with the public connecting end of feedback resistance R7 and backlight, for flowing through backlight by control
The electric current in source, controls the brightness of backlight；
Brightness control module 300 includes:
Multiple control light branch roads being formed in parallel, each control light props up route one resistance and electrical switch is in series, and each control light props up
Lu Junyu feedback resistance R7 earth.
As one embodiment of the invention, back light source brightness control circuit also includes overvoltage protective module 400, overvoltage protection mould
Block 400 is connected between the positive pole of backlight and the Enable Pin of current control module 200, is used for detecting backlight overvoltage, control
Current control module 200 processed stops output electric current.
Fig. 2 shows the circuit structure of the back light source brightness control circuit that the embodiment of the present invention provides, for convenience of description,
Illustrate only the part relevant to the embodiment of the present invention, details are as follows.
As one embodiment of the invention, power control module 100 includes:
Filter capacitor C1, electrical switch S1, field effect transistor Q1, diode Q2, divider resistance R1, divider resistance R2 and divider resistance
R3；
The source electrode of field effect transistor Q1 is the input of power control module 100, and filter capacitor C1 is connected between power supply and ground, point
Piezoresistance R1 is connected between the source electrode of field effect transistor Q1 and grid, the source of first termination field effect transistor Q1 of electrical switch S1
Pole, second end of electrical switch S1 is electric by divider resistance R2 and divider resistance R3 ground connection, divider resistance R2 and the dividing potential drop of series connection
The base stage of the commonly connected termination diode Q2 of resistance R3, the grounded emitter of diode Q2, the colelctor electrode of diode Q2 connects field effect
Should the grid of pipe Q1, the outfan that the drain electrode of field effect transistor Q1 is power control module 100.
As one embodiment of the invention, current control module 200 includes:
Voltage stabilizing integrated chip U1, diode D1, sustained diode 2, pull-up resistor R4, electric capacity C2, filter capacitor C3 and energy storage electricity
Sense L1；
Voltage stabilizing integrated chip U1 has been internally integrated a metal-oxide-semiconductor, and start end BOOST of voltage stabilizing integrated chip U1 connects the grid of metal-oxide-semiconductor,
The power end Vin of voltage stabilizing integrated chip U1 connects the drain electrode of metal-oxide-semiconductor, and the outfan SW of voltage stabilizing integrated chip U1 connects the source electrode of metal-oxide-semiconductor,
The input that power end Vin is current control module 200 of voltage stabilizing integrated chip U1, Enable Pin EN of voltage stabilizing integrated chip U1 is
The Enable Pin of current control module 200 connects the outfan of power control module 100 by pull-up resistor R4, and diode D1 is connected to
Between power end Vin and start end BOOST of voltage stabilizing integrated chip U1, electric capacity C2 is connected to the start end of voltage stabilizing integrated chip U1
Between BOOST and outfan SW, the ground end GND ground connection of voltage stabilizing integrated chip U1, the feedback end FB of voltage stabilizing integrated chip U1 is electricity
The feedback end of flow control module 200, the outfan SW of voltage stabilizing integrated chip U1 connects first end of energy storage inductor L1, the of inductance L1
Two ends are the outfan of current control module 200, and sustained diode 2 is connected between the first end and the ground of inductance L1, filtered electrical
Hold between the second end and the ground that C3 is connected to inductance L1.
As one embodiment of the invention, brightness control module 300 includes:
Resistance R8, resistance R9, resistance R10, electrical switch S2, electrical switch S3 and electrical switch S4；
A resistance R8 and electrical switch S2 control light branch road in series, a resistance R9 control light in series with electrical switch S3 props up
Road, a resistance R10 and electrical switch S4 control light branch road in series, each control light branch road all with feedback resistance R7 earth.
As one embodiment of the invention, overvoltage protective module 400 includes:
Zener diode D3, divider resistance R5, divider resistance R6 and audion Q3；
The negative electrode of Zener diode D3 connects the positive pole of backlight, and the anode of Zener diode D3 connected the divider resistance R5 of series connection
With the base stage of the commonly connected termination audion Q3 of divider resistance R6 ground connection, divider resistance R5 and divider resistance R6, audion Q3
Grounded emitter, the colelctor electrode of audion Q3 connects the Enable Pin of power control module 200.
The operation principle of this back light source brightness control circuit is:
After switching on power, pressing electrical switch S1, the base stage of audion Q2 obtains high voltage signal ON operation, field effect
The grid voltage of pipe Q1 is pulled low and ON operation, and Enable Pin EN of voltage stabilizing integrated chip U1 obtains the electric high level that is pulled to, voltage stabilizing
Integrated chip U1 obtains electric and starts working, and provides for backlight and drives electric current.The operation principle of voltage stabilizing integrated chip U1 is exactly root
Automatically the duty cycle of switching of internal metal-oxide-semiconductor, the switching frequency of metal-oxide-semiconductor is adjusted according to the pressure drop (for steady state value) above feedback resistance R7
The highest, within a cycle, when metal-oxide-semiconductor is opened, whole current supply circuit is open-minded, and backlight is started working, and energy storage inductor L1 stores up
Depositing energy, when metal-oxide-semiconductor is closed, whole current supply circuit disconnects, and the operating current of backlight maintains by the electricity of energy storage inductor L1,
Until next cycle metal-oxide-semiconductor is open-minded, thus reach the purpose of constant-voltage power supply, as long as i.e. feedback resistance value determines, then output
Constant-voltage power supply i.e. determines.The feedback end FB of voltage stabilizing integrated chip U1 and internal reference voltage source form a comparator, feedback
After the end FB comparison according to sampled voltage and reference voltage, chip internal automatically adjusts control metal-oxide-semiconductor and opens, closes accounting for of pulse
Empty ratio, if sampled voltage is more than reference voltage, illustrates to export electric current more than setting value, then the dutycycle of pulse just reduces,
Reduction output electric current is to setting value, if sampled voltage is less than reference voltage, illustrates to export electric current less than setting value, then pulse
Dutycycle just raise, increase output electric current to setting value.
If overvoltage occurs in the anode of backlight, Zener diode D3 is breakdown, and the base stage of audion Q3 is high level, three
Pole pipe Q3 turns on, and the Enable Pin EN ground connection of voltage stabilizing integrated chip U1, voltage stabilizing integrated chip U1 no longer exports supply current to backlight
Source, thus protect backlight.
If need light modulation, can press electrical switch S2, electrical switch S3, electrical switch S4 and to electrical switch S2,
Electrical switch S3, the state combination in any of electrical switch S4, such feedback resistance R7, resistance R8, resistance R9, resistance R10 are permissible
It is arbitrarily made with different resistances, then backlight will be operated in different current values, thus reaches the purpose of light modulation, it is achieved
Backlight has level to dim, and meets people's demand to light modulation.
Another embodiment of the present invention also provides for a display device including above-mentioned back light source brightness control circuit.
In embodiments of the present invention, the brightness control module of back light source brightness control circuit includes multiple control light branch road, often
Individual control light branch road include series connection resistance and electrical switch, each control light branch road all with feedback resistance earth, by control
The break-make of electrical switch, thus it is possible to vary the resistance of feedback resistance, thus control to flow through the electric current of backlight, reach to control backlight
The purpose of brightness, the advantage that this back light source brightness control circuit has simple in construction, low cost.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (10)
1. a back light source brightness control circuit, is connected with backlight, it is characterised in that described back light source brightness control circuit bag
Include:
Current control module, its output terminates described backlight, for exporting constant-voltage power supply to backlight；
Power control module, it inputs termination power, the input of the output described current control module of termination and Enable Pin, is used for
Control the break-make that current control module is powered by power supply；
The described power supply of commonly connected termination of feedback resistance, ground connection of connecting with described backlight, described feedback resistance and backlight
The feedback end of control module, described feedback resistance is used for the current feedback by flowing through described backlight to described electricity flow control module
Block；And
The brightness control module being connected with the public connecting end of described feedback resistance and backlight, for flowing through backlight by control
The electric current in source, controls the brightness of backlight；
Described brightness control module includes: multiple control light branch roads being formed in parallel, and described each control light props up route one resistance and electricity
Son switch be in series, described each control light branch road all with feedback resistance earth.
2. back light source brightness control circuit as claimed in claim 1, it is characterised in that described back light source brightness control circuit is also
Including:
It is connected between positive pole and the Enable Pin of current control module of described backlight, and is used for described backlight mistake being detected
Pressure, controls described current control module and stops the overvoltage protective module of output electric current.
3. back light source brightness control circuit as claimed in claim 1, it is characterised in that described power control module includes: filter
Ripple electric capacity C1, electrical switch S1, field effect transistor Q1, diode Q2, divider resistance R1, divider resistance R2 and divider resistance R3；
The source electrode of described field effect transistor Q1 is the input of power control module, described filter capacitor C1 be connected to described power supply and
Between ground, described divider resistance R1 is connected between the source electrode of field effect transistor Q1 and grid, first end of described electrical switch S1
Connecing the source electrode of field effect transistor Q1, second end of described electrical switch S1 is connect by the divider resistance R2 and divider resistance R3 of series connection
Ground, the base stage of the commonly connected termination diode Q2 of described divider resistance R2 and divider resistance R3, the transmitting of described diode Q2
Pole ground connection, the colelctor electrode of described diode Q2 connects the grid of field effect transistor Q1, and the drain electrode of described field effect transistor Q1 is power supply control
The outfan of module.
4. back light source brightness control circuit as claimed in claim 1, it is characterised in that described current control module includes: steady
Press integrated chip U1, diode D1, sustained diode 2, pull-up resistor R4, electric capacity C2, filter capacitor C3 and energy storage inductor L1；
Described voltage stabilizing integrated chip U1 has been internally integrated a metal-oxide-semiconductor, and start end BOOST of described voltage stabilizing integrated chip U1 connects described
The grid of metal-oxide-semiconductor, the power end Vin of described voltage stabilizing integrated chip U1 meets the drain electrode of described metal-oxide-semiconductor, described voltage stabilizing integrated chip U1
Outfan SW connect the source electrode of described metal-oxide-semiconductor, the input that power end Vin is current control module of described voltage stabilizing integrated chip U1
End, the Enable Pin that Enable Pin EN is current control module of described voltage stabilizing integrated chip U1 connects described power supply by pull-up resistor R4
The outfan of control module, described diode D1 be connected to the power end Vin of voltage stabilizing integrated chip U1 and start end BOOST it
Between, described electric capacity C2 is connected between start end BOOST and the outfan SW of voltage stabilizing integrated chip U1, the integrated chip of described voltage stabilizing
The ground end GND ground connection of U1, the feedback end that feedback end FB is described power control module of described voltage stabilizing integrated chip U1, described surely
The outfan SW pressing integrated chip U1 connects first end of energy storage inductor L1, and second end of described inductance L1 is current control module
Outfan, described sustained diode 2 is connected between the first end and the ground of inductance L1, and described filter capacitor C3 is connected to inductance
Between second end and the ground of L1.
5. back light source brightness control circuit as claimed in claim 2, it is characterised in that described overvoltage protective module includes: steady
Pressure diode D3, divider resistance R5, divider resistance R6 and audion Q3；The negative electrode of described Zener diode D3 is just connecing backlight
Pole, the anode of described Zener diode D3 connected divider resistance R5 and divider resistance R6 ground connection, the described divider resistance of series connection
The base stage of the commonly connected termination audion Q3 of R5 and divider resistance R6, the grounded emitter of described audion Q3, described three poles
The colelctor electrode of pipe Q3 connects the Enable Pin of described power control module.
6. a display device, including backlight, it is characterised in that described display device also includes that back light source brightness controls electricity
Road, described back light source brightness control circuit includes:
Current control module, its output terminates described backlight, for exporting constant-voltage power supply to backlight；
Power control module, it inputs termination power, the input of the output described current control module of termination and Enable Pin, is used for
Control the break-make that current control module is powered by power supply；
The described power supply of commonly connected termination of feedback resistance, ground connection of connecting with described backlight, described feedback resistance and backlight
The feedback end of control module, described feedback resistance is used for the current feedback by flowing through described backlight to described electricity flow control module
Block；And
The brightness control module being connected with the public connecting end of described feedback resistance and backlight, for flowing through backlight by control
The electric current in source, controls the brightness of backlight；
Described brightness control module includes: multiple control light branch roads being formed in parallel, and described each control light props up route one resistance and electricity
Son switch be in series, described each control light branch road all with feedback resistance earth.
7. back light source brightness control circuit as claimed in claim 6, it is characterised in that described back light source brightness control circuit is also
Including: it is connected between positive pole and the Enable Pin of current control module of described backlight, and is used for described backlight being detected
Overvoltage, controls described current control module and stops the overvoltage protective module of output electric current.
8. back light source brightness control circuit as claimed in claim 6, it is characterised in that described power control module includes: filter
Ripple electric capacity C1, electrical switch S1, field effect transistor Q1, diode Q2, divider resistance R1, divider resistance R2 and divider resistance R3；
The source electrode of described field effect transistor Q1 is the input of power control module, described filter capacitor C1 be connected to described power supply and
Between ground, described divider resistance R1 is connected between the source electrode of field effect transistor Q1 and grid, first end of described electrical switch S1
Connecing the source electrode of field effect transistor Q1, second end of described electrical switch S1 is connect by the divider resistance R2 and divider resistance R3 of series connection
Ground, the base stage of the commonly connected termination diode Q2 of described divider resistance R2 and divider resistance R3, the transmitting of described diode Q2
Pole ground connection, the colelctor electrode of described diode Q2 connects the grid of field effect transistor Q1, and the drain electrode of described field effect transistor Q1 is power supply control
The outfan of module.
9. back light source brightness control circuit as claimed in claim 6, it is characterised in that described current control module includes: steady
Press integrated chip U1, diode D1, sustained diode 2, pull-up resistor R4, electric capacity C2, filter capacitor C3 and energy storage inductor L1；
Described voltage stabilizing integrated chip U1 has been internally integrated a metal-oxide-semiconductor, and start end BOOST of described voltage stabilizing integrated chip U1 connects described
The grid of metal-oxide-semiconductor, the power end Vin of described voltage stabilizing integrated chip U1 meets the drain electrode of described metal-oxide-semiconductor, described voltage stabilizing integrated chip U1
Outfan SW connect the source electrode of described metal-oxide-semiconductor, the input that power end Vin is current control module of described voltage stabilizing integrated chip U1
End, the Enable Pin that Enable Pin EN is current control module of described voltage stabilizing integrated chip U1 connects described power supply by pull-up resistor R4
The outfan of control module, described diode D1 be connected to the power end Vin of voltage stabilizing integrated chip U1 and start end BOOST it
Between, described electric capacity C2 is connected between start end BOOST and the outfan SW of voltage stabilizing integrated chip U1, the integrated chip of described voltage stabilizing
The ground end GND ground connection of U1, the feedback end that feedback end FB is described power control module of described voltage stabilizing integrated chip U1, described surely
The outfan SW pressing integrated chip U1 connects first end of energy storage inductor L1, and second end of described inductance L1 is current control module
Outfan, described sustained diode 2 is connected between the first end and the ground of inductance L1, and described filter capacitor C3 is connected to inductance
Between second end and the ground of L1.
10. back light source brightness control circuit as claimed in claim 7, it is characterised in that described overvoltage protective module includes: steady
Pressure diode D3, divider resistance R5, divider resistance R6 and audion Q3；
The negative electrode of described Zener diode D3 connects the positive pole of backlight, and the anode of described Zener diode D3 connected dividing of series connection
Piezoresistance R5 and divider resistance R6 ground connection, the base of the commonly connected termination audion Q3 of described divider resistance R5 and divider resistance R6
Pole, the grounded emitter of described audion Q3, the colelctor electrode of described audion Q3 connects the Enable Pin of described power control module.
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| CN201610948857.5A CN106328072A (en) | 2016-10-27 | 2016-10-27 | Backlight intensity circuit and display device thereof |
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|---|---|---|---|
| CN201610948857.5A CN106328072A (en) | 2016-10-27 | 2016-10-27 | Backlight intensity circuit and display device thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910445A (en) * | 2017-04-13 | 2017-06-30 | 昆山龙腾光电有限公司 | Current control method and liquid crystal module based on non-programmable LED drive circuit |
| CN107342059A (en) * | 2017-08-31 | 2017-11-10 | 京东方科技集团股份有限公司 | A kind of current control circuit and control method, backlight module, display device |
| CN108564924A (en) * | 2018-03-22 | 2018-09-21 | 昆山龙腾光电有限公司 | Backlight regulating circuit and backlight adjusting method |
| CN108882442A (en) * | 2018-05-18 | 2018-11-23 | 京东方科技集团股份有限公司 | The control method and display device of backlight, backlight |
| CN109036293A (en) * | 2018-07-27 | 2018-12-18 | 青岛小鸟看看科技有限公司 | A kind of liquid crystal display brightness regulating circuit and a kind of liquid crystal display |
| CN110070836A (en) * | 2019-04-19 | 2019-07-30 | 重庆两江联创电子有限公司 | Drive circuit for backlight module group |
| CN111081192A (en) * | 2019-12-05 | 2020-04-28 | 芜湖宏景电子股份有限公司 | Two-stage brightness control circuit for backlight lamp of vehicle-mounted multimedia display screen |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646288A (en) * | 2009-08-27 | 2010-02-10 | 佛山市美博照明有限公司 | Dimming method applicable to traditional dimmers and LED dimmable drive power |
| CN101707826A (en) * | 2009-03-19 | 2010-05-12 | 海洋王照明科技股份有限公司 | LED constant current driving circuit |
| CN101707836A (en) * | 2009-11-12 | 2010-05-12 | 英飞特电子（杭州）有限公司 | Circuit for dimming through power switch |
| CN101720148A (en) * | 2009-07-21 | 2010-06-02 | 海洋王照明科技股份有限公司 | LED driving circuit and LED device |
| CN102711307A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | Dimmable light-emitting diode (LED) drive circuit and lamp |
-
2016
- 2016-10-27 CN CN201610948857.5A patent/CN106328072A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707826A (en) * | 2009-03-19 | 2010-05-12 | 海洋王照明科技股份有限公司 | LED constant current driving circuit |
| CN101720148A (en) * | 2009-07-21 | 2010-06-02 | 海洋王照明科技股份有限公司 | LED driving circuit and LED device |
| CN101646288A (en) * | 2009-08-27 | 2010-02-10 | 佛山市美博照明有限公司 | Dimming method applicable to traditional dimmers and LED dimmable drive power |
| CN101707836A (en) * | 2009-11-12 | 2010-05-12 | 英飞特电子（杭州）有限公司 | Circuit for dimming through power switch |
| CN102711307A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | Dimmable light-emitting diode (LED) drive circuit and lamp |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106910445A (en) * | 2017-04-13 | 2017-06-30 | 昆山龙腾光电有限公司 | Current control method and liquid crystal module based on non-programmable LED drive circuit |
| CN107342059A (en) * | 2017-08-31 | 2017-11-10 | 京东方科技集团股份有限公司 | A kind of current control circuit and control method, backlight module, display device |
| CN107342059B (en) * | 2017-08-31 | 2019-07-23 | 京东方科技集团股份有限公司 | A kind of current control circuit and control method, backlight module, display device |
| CN108564924A (en) * | 2018-03-22 | 2018-09-21 | 昆山龙腾光电有限公司 | Backlight regulating circuit and backlight adjusting method |
| CN108882442A (en) * | 2018-05-18 | 2018-11-23 | 京东方科技集团股份有限公司 | The control method and display device of backlight, backlight |
| CN109036293A (en) * | 2018-07-27 | 2018-12-18 | 青岛小鸟看看科技有限公司 | A kind of liquid crystal display brightness regulating circuit and a kind of liquid crystal display |
| CN110070836A (en) * | 2019-04-19 | 2019-07-30 | 重庆两江联创电子有限公司 | Drive circuit for backlight module group |
| CN110070836B (en) * | 2019-04-19 | 2021-01-26 | 重庆两江联创电子有限公司 | Backlight module driving circuit |
| CN111081192A (en) * | 2019-12-05 | 2020-04-28 | 芜湖宏景电子股份有限公司 | Two-stage brightness control circuit for backlight lamp of vehicle-mounted multimedia display screen |
| CN111653243A (en) * | 2020-06-23 | 2020-09-11 | 上海天马微电子有限公司 | Driving circuit, backlight structure, display panel, display device and driving method |
| CN111653243B (en) * | 2020-06-23 | 2022-02-08 | 上海天马微电子有限公司 | Driving circuit, backlight structure, display panel, display device and driving method |
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Application publication date: 20170111 |