CN108461069A - A kind of multi partition backlight drive circuit and display device - Google Patents
A kind of multi partition backlight drive circuit and display device Download PDFInfo
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- CN108461069A CN108461069A CN201810470297.6A CN201810470297A CN108461069A CN 108461069 A CN108461069 A CN 108461069A CN 201810470297 A CN201810470297 A CN 201810470297A CN 108461069 A CN108461069 A CN 108461069A
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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
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a kind of multi partition backlight drive circuit and display devices, when solving when in use to divide in the prior art multiplexing control multichannel driving, after being powered off to backlight, remaining electricity makes backlight occur the problem of slightly lighting when should not be bright in circuit and backlight.Multi partition back of the body driving circuit includes the discharge module being connect with multichannel backlight in the embodiment of the present invention；When implementing, the discharge module is for discharging the electricity retained in the backlight and the conducting wire being connected with the backlight.Since the discharge module in the embodiment of the present invention can discharge the electricity in backlight and the conducting wire being connected with the backlight, after the switch being connect with backlight anode disconnects, remaining electricity can be discharged module release in backlight and the conducting wire being connected with backlight, therefore when the first metal-oxide-semiconductor output high level makes the negative terminal of backlight be in connected state, due to no remaining electricity, backlight is not in the phenomenon that being lit.
Description
Technical field
The present invention relates to display technology field more particularly to a kind of multi partition backlight drive circuit and display devices.
Background technology
Currently, liquid crystal display extensive use in people's lives, while with a large amount of uses of liquid crystal display, to liquid crystal
The static contrast of the picture of display and the stereovision of picture require also higher.
In the prior art, the static contrast and picture of liquid crystal display picture are controlled using multi partition backlight control function
Stereovision.Backlight subarea number is more, more can effectively promote the stereovision of the static contrast and picture of picture.But with
Backlight subarea number increases, and the driving circuit used also becomes to become increasingly complex.Therefore in these cases, multichannel backlight passes through
Time-multiplexed mode shares the development trend that driving circuit all the way has become field of liquid crystal display.
Currently, when being multiplexed by time division multiplexing mode, since the power supply of multichannel backlight is in frequent switch
Switching state may result in if the velocity of discharge of power supply is slower and have remaining electricity in a few road backlights of common drive circuit
Amount.Therefore, after a loss of power due to also having remaining electricity, backlight to there is also in the state of should not light in backlight
Slight the case where lighting.
To sum up, in the prior art, using time division multiplexing control multichannel drive when, after being powered off to backlight, circuit and
Remaining electricity makes backlight occur the case where slightly lighting when should not be bright in backlight.
Invention content
An embodiment of the present invention provides a kind of multi partition backlight drive circuit and display devices, to solve in the prior art
When dividing multiplexing control multichannel driving when in use, after being powered off to backlight, remaining electricity makes backlight in circuit and backlight
Occurs the problem of slightly lighting when should not be bright.
In a first aspect, the embodiment of the present invention provides a kind of multi partition backlight drive circuit, the multi partition backlight drive circuit
Including：Multichannel backlight；And connect with the backlight anode for discharge the backlight and with the backlight phase
The discharge module of electricity is retained in conducting wire even.
Foregoing circuit, the discharge module are connected with the anode of the multichannel backlight, when implementation, the discharge module
For discharging the electricity retained in the backlight and the conducting wire being connected with the backlight.Due to putting in the embodiment of the present invention
Electric module can discharge the electricity in backlight and the conducting wire being connected with the backlight, in connect with backlight anode
After two switches disconnect, remaining electricity can be discharged module release in backlight and the conducting wire being connected with backlight, therefore work as
When first metal-oxide-semiconductor output high level makes the negative terminal of backlight be in connected state, due to no remaining electricity, backlight will not
The phenomenon that being lit.
In one possible implementation, discharge module includes a discharge cell and multiple anti-short-circuit units, described
Anti- short-circuit unit is corresponded with the backlight；
The input terminal of the discharge cell is connect with the output end of the multiple anti-short-circuit unit, the discharge cell it is defeated
Outlet is grounded；
Anode per backlight all the way is connected with the input terminal of the corresponding anti-short-circuit unit.
Foregoing circuit is connect per backlight all the way with anti-short-circuit unit, each anti-short-circuit unit connects with discharge cell
It connects, when second switch is not connect with any backlight, i.e., converter does not export supply voltage, is connected before with second switch
Backlight in voltage and the voltage in the conducting wire that is connected with the backlight pass through anti-short-circuit unit and discharge cell quilt
Release, since remaining capacity does not discharge, the phenomenon that backlight will not be lit when that should not light.
In one possible implementation, discharge cell includes resistance, MOS (Metal-Oxide-
Semiconductor, MOS field-effect transistor) it manages and the first controller；
The grid of the metal-oxide-semiconductor is connect with first controller, and the drain electrode of the metal-oxide-semiconductor connects with one end of the resistance
It connects, the source electrode ground connection of the metal-oxide-semiconductor；
The other end of the resistance is connect with the output end of the anti-short-circuit unit；
The controller is used to control cut-off/conducting state of the metal-oxide-semiconductor, described first after backlight power-off
Controller controls the metal-oxide-semiconductor conducting.
Foregoing circuit clearly provides the component that discharge cell includes, and is discharged in operation in determination, institute
It states controller and controls the metal-oxide-semiconductor conducting, and then keep the discharge module in the conduction state, the discharge cell starts work
Make, retains electricity in release backlight and the conducting wire being connected with backlight, so that backlight is not appeared in should not be lit
When and the phenomenon that of being lit.
In one possible implementation, the discharge cell includes at least one resistance；One end of the resistance with
The output end of the anti-short-circuit unit connects, the other end ground connection of the resistance.
Foregoing circuit when including only in the discharge cells resistance, does not need controller and is controlled at this time, but the moment
State in electric discharge, after backlight and second switch disconnect, discharge module continues to discharge backlight still in the state of conducting
Electricity in source and the conducting wire being connected with the backlight, makes backlight not appear in when should not be lit and be lit
Phenomenon.
In one possible implementation, the discharge module include a discharge cell, an anti-short-circuit unit,
First switch and second controller；
The input terminal of the anti-short-circuit unit is connect by first switch with the anode of the multichannel backlight, described anti-short
The output end of road unit is connect with the input terminal of the discharge cell；
The output end of the discharge cell is grounded；
Wherein, the second controller is used to control the open/closed state of the first switch, disconnected in the backlight
The second controller controls the first switch and is closed after electricity.
Foregoing circuit controls the state of first switch by second controller, makes the backlight L to discharge and prevents
After short-circuit unit is connected, the electricity in the conducting wire being connected in backlight and with the backlight is discharged, and then work as second switch
When closure and the first metal-oxide-semiconductor are connected, the backlight that should not be lit is not in slight the phenomenon that lighting.
In a kind of mode in the cards, the discharge cell includes：Resistance, metal-oxide-semiconductor and the first controller；
The grid of the metal-oxide-semiconductor is connect with first controller, and the drain electrode of the metal-oxide-semiconductor connects with one end of the resistance
It connects, the source electrode ground connection of the metal-oxide-semiconductor；
The other end of the resistance is connect with the output end of the anti-short-circuit unit；
First controller is used to control cut-off/conducting state of the metal-oxide-semiconductor, described after backlight power-off
First controller controls the metal-oxide-semiconductor conducting.
Foregoing circuit is determining that second controller controls first switch and is closed when needing to carry out discharge operation, the first control
Device controls the metal-oxide-semiconductor conducting, and then keeps the discharge module in the conduction state, and discharge module is started to work, and backlight is discharged
Remaining electricity in source and the conducting wire being connected with the backlight, makes backlight not appear in when should not be lit and by point
Bright phenomenon.
In a kind of mode in the cards, the discharge cell includes resistance；
One end of the resistance is connect with the output end of the anti-short-circuit unit, the other end ground connection of the resistance.
Foregoing circuit, after the backlight and the second switch disconnect, second controller controls first switch, release
Electricity in backlight and the conducting wire being connected with backlight, the backlight are not in the case where being lit.
In one possible implementation, the anti-short-circuit unit includes diode.
Foregoing circuit clearly provides component included in anti-short-circuit unit, ensures when carrying out discharge operation, will not
There is the phenomenon of short circuit.
In one possible implementation, in the discharge module include multiple discharge cells, the discharge cell with
The backlight corresponds；The input terminal of the discharge cell is connect with the anode of the backlight, the discharge cell
Output end is grounded.
Foregoing circuit is all connected with discharge cell per backlight all the way, and each discharge cell is grounded, when needs are to the back of the body
When light source carries out discharge operation, the voltage in backlight is transmitted to discharge module from the anode of backlight, is finally released,
Due to not having voltage in backlight, backlight under the first metal-oxide-semiconductor conducting state, will not occur when second switch breaks
Slight the phenomenon that lighting.
In one possible implementation, the discharge cell includes：Resistance, metal-oxide-semiconductor, the first controller；
The grid of the metal-oxide-semiconductor is connect with first controller, and the drain electrode of the metal-oxide-semiconductor is connect with the resistance；Institute
State the source electrode ground connection of metal-oxide-semiconductor；The other end of the resistance is connect with the anode of the backlight；First controller is for controlling
Cut-off/the conducting state for making the metal-oxide-semiconductor, first controller controls the metal-oxide-semiconductor conducting after backlight power-off.
Foregoing circuit clearly provides the component contained in discharge cell and connection type, discharges in determination
In operation, the controller controls the metal-oxide-semiconductor conducting, and then keeps the discharge module in the conduction state, the electric discharge
Unit is started to work, and retains electricity in release backlight and the conducting wire being connected with backlight, backlight is made not appear in
The phenomenon that of being lit when should not be lit.
In one possible implementation, the discharge cell includes resistance；
One end of the resistance is connect with the anode of the backlight, the other end ground connection of the resistance.
Foregoing circuit clearly provides in discharge cell when including only resistance, and after being powered off to backlight, discharge module is still
The state being on continues to discharge the electricity in backlight and the conducting wire being connected with the backlight, makes backlight will not
It appeared in when should not be lit and the phenomenon that of being lit.
The embodiment of the present invention provides a kind of circuit of multi partition backlight drive, the circuit of multi partition backlight drive, including：Become
Parallel operation, driver, backlight processing unit, multichannel backlight and connect with backlight anode for discharge the backlight and
The discharge module of electricity is retained in the conducting wire being connected with the backlight；
Wherein, the input terminal of converter is connect with power supply, output end by second switch and the multichannel backlight just
End connection；
Driver is connect with the backlight processing unit and the converter, and passes through the first metal-oxide-semiconductor and multichannel backlight
The negative terminal and sample circuit in source connect；
Backlight processing unit is for controlling the driver, the converter and the second switch.
Foregoing circuit provides component and connection structure that entire multi partition backlight drive circuit includes, and each
Effect of the component in multi partition backlight drive circuit.
An embodiment of the present invention provides the backlight drives described in any one of a kind of display device, including above-mentioned technical proposal
Circuit.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the schematic diagram of the driving circuit of multichannel time-sharing multiplex in the prior art；
Fig. 2 is a kind of structural schematic diagram of backlight drive circuit provided in an embodiment of the present invention；
Fig. 3 is the concrete structure schematic diagram of discharge module in the first backlight drive circuit provided in an embodiment of the present invention；
Fig. 4 is the concrete structure schematic diagram of discharge module in second of backlight drive circuit provided in an embodiment of the present invention；
Fig. 5 is the discharge circuit schematic diagram of discharge module in the first backlight drive circuit provided in an embodiment of the present invention；
Power supply timing figure when Fig. 6 is multiplexing provided in an embodiment of the present invention；
Fig. 7 is the control of discharge sequence diagram of the embodiment of the present invention；
Fig. 8 be second of backlight drive provided in an embodiment of the present invention circuit in discharge module discharge circuit principle
Figure；
Fig. 9 (a) is the first connection type of resistance in discharge cell in the embodiment of the present invention；
Fig. 9 (b) is second of connection type of resistance in discharge cell in the embodiment of the present invention；
Fig. 9 (c) is the third connection type of resistance in discharge cell in the embodiment of the present invention；
Figure 10 be the third multi partition backlight drive provided in an embodiment of the present invention circuit in discharge module specific knot
Structure schematic diagram；
Figure 11 is the discharge circuit of discharge module in the third multi partition backlight drive circuit provided in an embodiment of the present invention
Schematic diagram；
Figure 12 is the discharge circuit of discharge module in the 4th kind of multi partition backlight drive circuit provided in an embodiment of the present invention
Schematic diagram；
Figure 13 be the 4th kind of multi partition backlight drive provided in an embodiment of the present invention circuit in discharge module specific knot
Structure schematic diagram；
Figure 14 be the 5th kind of multi partition backlight drive provided in an embodiment of the present invention circuit in discharge module specific knot
Structure schematic diagram；
Figure 15 be the 6th kind of multi partition backlight drive provided in an embodiment of the present invention circuit in discharge module specific knot
Structure schematic diagram；
Figure 16 is electric for the electric discharge of discharge module in the circuit of the 5th kind of multi partition backlight drive provided in an embodiment of the present invention
Road schematic diagram；
Figure 17 is electric for the electric discharge of discharge module in the circuit of the 6th kind of multi partition backlight drive provided in an embodiment of the present invention
Road schematic diagram；
The concrete structure that Figure 18 discharges in the circuit for another multi partition backlight drive provided in an embodiment of the present invention shows
It is intended to.
Specific implementation mode
The framework and business scenario of the embodiment of the present application description are to more clearly illustrate the embodiment of the present application
Technical solution does not constitute the restriction for technical solution provided by the embodiments of the present application, those of ordinary skill in the art it is found that
With the appearance of new business scene, technical solution provided by the embodiments of the present application is equally applicable for similar technical problem.
Currently, liquid crystal display is increasingly common in life, it is widely used in the electronic products such as TV, computer, mobile phone；
Simultaneously in order to simplify the complexity of driving circuit, most of liquid crystal display is carried on the back by multi partition under time division multiplexing mode
Optical controlling function realizes the state of backlight L in subregion backlight 12 in liquid crystal display, containing more wherein in subregion backlight 12
Road backlight L, and multichannel backlight L shares backlight drive all the way.As shown in Figure 1, for multichannel time-sharing multiplex in the prior art
The schematic diagram of driving circuit, specifically includes：Converter 10, second switch K2, subregion backlight 12, the first metal-oxide-semiconductor 13, sampling electricity
Road Rs14, driver 15, backlight processing unit 16；
Wherein, the converter 10 can be DC/DC (Direct Current/Direct Current, DC/DC)
Converter 10 or AC/DC (Alternating current/Direct Current, ac/dc) converter 10；Described
Two switch K2 are multiplexing selecting switch；In the subregion backlight 12 is one or more LED per backlight L all the way
(Light Emitting Diode, Light-Emitting Diode) is connected in series；The driver 15 is PWM (Pulse Width
Modulation, pulse width modulation) driver 15.
With converter 10 for DC/DC converters 10, driver 15 is that (Pulse Width Modulation, pulse are wide by PWM
Degree modulation) for driver 15, as shown in Figure 1, the driving circuit of multichannel time-sharing multiplex has following connection type：
Wherein, converter 10 is connect by second switch K2 with the anode of the backlight L in subregion backlight 12, the subregion back of the body
The negative terminal of backlight L in light source 12 is connect with the drain electrode of the first metal-oxide-semiconductor 13, grid and the pwm driver 15 of the first metal-oxide-semiconductor 13
One end connection, the source electrode of the first metal-oxide-semiconductor 13 connect with sample circuit Rs14, and sample circuit Rs14 is grounded, pwm driver 15
The other end is connect with backlight processing unit 16.
In force, the backlight processing unit 16 controls the back of the body all the way in the output subregion of the converter 10 backlight 12
Light source L required supply voltages when lighting, and after determining that the converter 10 exports supply voltage, control second switch K2
It is closed, supply voltage is made to flow into backlight；Driver 15 is controlled simultaneously and exports high level, and control the first metal-oxide-semiconductor conducting is constituted back
Road, backlight L are lighted.
As can be known from Fig. 1, the backlight L in subregion backlight 12 shares a pwm driver 15, therefore is lighted at one
In period, the voltage that converter 10 exports is supplied in subregion backlight 12 successively per backlight L, while pwm driver 15 all the way
Also according to the state output drive signal lighted required for every backlight L all the way in subregion backlight 12.
Wherein, the ignition period is determined according to signaling mode, the general integral multiple for using 60Hz or 50Hz, such as
PAL (Phase Alteration Line, quadrature amplitude balance phase-aoternation line system) is 50Hz, and NTSC (National
Television Standards Committee, quadrature amplitude balance system) it is 60Hz.
Specifically, after power input is to the converter 10, exports one or more by the converter 10 and be applicable in
In the supply voltage VLED of the backlight L, when the second switch K2 is connect with the backlight L in the subregion backlight 12
Afterwards, the pwm signal that the output of pwm driver 15 is connected for controlling first metal-oxide-semiconductor 13, wherein could be provided as PWM drivings
Device 15 lights the backlight L in subregion backlight 12 when exporting high, backlight L extinguishes when exporting low.
At this point, after second switch K2 is connect with the L of backlight all the way in subregion backlight 12, pwm driver 15 exports
Pwm signal when being high, it is in the conduction state between the positive electrode and negative electrode for backlight L connect with second switch K2, make described in
Backlight L is lighted.Since second switch K2 speed is sufficiently fast, simultaneously because the persistence of vision effect of human eye, can make to share one
Multichannel backlight L in the subregion backlight 12 of a pwm driver 15 carries out brightness adjustment control respectively.
As shown in Figure 1, when second switch K2 is opened to position 1, pwm driver 15 exports subregion in one cycle
The pwm signal of brightness needed for backlight L1 in backlight 12, the first metal-oxide-semiconductor 13 is in the conduction state at this time, and backlight L1 is by point
It is bright；After an of short duration interval time (dead time), in same period when second switch K2 is opened to position 2,
Pwm driver 15 exports the pwm signal of brightness needed for backlight L2 in subregion backlight 12, and the first metal-oxide-semiconductor 13 is in and leads at this time
Logical state, backlight L2 are lit；When backlight L2 is lit, switch is disconnected with position 1, and backlight L1 has been at this time
It is inputted through no supply voltage, but due to retaining electricity when being lit before in backlight L1 and conducting wire, so in PWM
The output of driver 15 is when lighting the pwm signal needed for backlight L2, under the first metal-oxide-semiconductor 13 is in the conduction state, backlight L1 and leads
The electricity retained in line will circulate, and backlight L1 is made to occur slight light at the time of should not light.
The embodiment of the present invention increases by one in the anode supply line of the multichannel backlight L in subregion backlight 12 and puts
Electric module 21, while the anode that can be connected within a certain period of time to backlight L and with the backlight L by driver 15
The electricity retained in supply lines carries out discharge operation.
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
Specifically, as shown in Fig. 2, a kind of structural representation of multi partition backlight drive circuit provided in an embodiment of the present invention
Figure, the multi partition backlight drive circuit is in addition to including above-mentioned converter 10, second switch K2, the first metal-oxide-semiconductor 13, sampling electricity
Road Rs14, driver 15, backlight processing unit 16 etc. further include：Multichannel backlight L；And the electric discharge being connect with the backlight L
Module 21, the discharge module 21 are used to discharge to retain in the backlight 12 and the conducting wire being connected with the backlight 12
Electricity.
In embodiments of the present invention, the discharge module 21 is connected with the anode of the multichannel backlight L, when implementation,
The discharge module 21 is for discharging the electricity retained in the backlight L and the conducting wire being connected with the backlight L.Due to this
Discharge module 21 in inventive embodiments can discharge the electricity in backlight L and the conducting wire being connected with the backlight L,
After the second switch K2 being connect with backlight L anodes is disconnected, remaining electricity in backlight L and the conducting wire being connected with backlight L
Amount can be discharged the release of module 21, therefore when the first metal-oxide-semiconductor output high level makes the negative terminal of backlight L be in connected state,
Due to no remaining electricity, backlight L is not in the phenomenon that being lit.
Wherein, the discharge module 21 has a variety of existence forms, is specifically introduced below with section Example.
Embodiment one：The discharge module 21 includes discharge cell 22 and anti-short-circuit unit 23.
Optionally, the discharge module 21 includes a discharge cell 22 and multiple anti-short-circuit units 23, the anti-short circuit
The unit 23 and backlight L is corresponded；
The input terminal of the discharge cell 22 is connect with the output end of the multiple anti-short-circuit unit 23, the discharge cell
22 output end ground connection；
Anode per backlight 12 all the way is connected with the input terminal of the corresponding anti-short-circuit unit 23.
As shown in figure 3, in the first multi partition backlight drive circuit in the embodiment of the present invention discharge module 21 it is specific
Structural schematic diagram, for containing four road backlights (L1, L2, L3, L4) in subregion backlight 12.
Wherein, the anti-short-circuit unit 23 (being indicated with anti-short-circuit unit 1 in figure) of the first via and first in subregion backlight 12
The anode of road backlight L1 is connected；The anti-short-circuit unit 23 (being indicated with anti-short-circuit unit 2 in figure) in second tunnel and subregion backlight 12
In the anode of the second road backlight L2 be connected；The anti-short-circuit unit 23 (being indicated with anti-short-circuit unit 3 in figure) in third road with point
The anode of third road backlight L3 in area's backlight 12 is connected；The anti-short-circuit unit in 4th tunnel 23 is (with anti-short-circuit unit 4 in figure
Indicate) it is connected with the anode of the 4th road backlight L4 in subregion backlight 12；Per the output end of anti-short-circuit unit 23 all the way
All it is connected with discharge module 21.
It should be noted that in embodiments of the present invention, the anti-short-circuit unit of multichannel 23 can share a discharge cell 22,
Different discharge cells 22 can also be used, as shown in figure 4, in the embodiment of the present invention in second of multi partition backlight drive circuit
The concrete structure schematic diagram of discharge module 21, as can be known from Fig. 4：The anti-short-circuit unit in anti-23 and second tunnel of short-circuit unit of the first via 23
A discharge cell 22 is shared, anti-23 and the 4th anti-short-circuit unit 23 in tunnel of short-circuit unit in third road shares a discharge cell 22,
Specifically how to be used in multi partition backlight drive circuit, is the wire structures of the circuit of backlight drive when depending on initial.
Wherein, the anti-short-circuit unit 23 is for making the voltage in backlight 12 and the conducting wire being connected with backlight 12 can
Normally to discharge, the phenomenon for occurring short circuit in circuit is prevented.
It when implementing, is connect with anti-short-circuit unit 23 per backlight L all the way, each anti-short-circuit unit 23 is single with electric discharge
Member 22 connects, and when second switch K2 is not connect with any backlight L in subregion backlight 12, i.e., converter 10 does not export power supply
When voltage, voltage in the backlight L being connected with second switch K2 before and the electricity in the conducting wire being connect with the backlight L
Pressure is released by anti-short-circuit unit 23 and discharge cell 22, since remaining capacity is released, when switch and the subregion
In backlight 12 when other backlights L connections, under the first metal-oxide-semiconductor 13 is in the conduction state, it is connected before with second switch K2
Backlight L will not appear in when should not light and the phenomenon that of being lit.
Wherein, the discharge cell 22 is specifically introduced below there are a variety of connection types.
Mode one：The discharge cell 22 includes：Resistance R30, metal-oxide-semiconductor 31 and the first controller 32；
Optionally, the grid of the metal-oxide-semiconductor 31 is connect with first controller 32, the drain electrode of the metal-oxide-semiconductor 31 and institute
State one end connection of resistance R30, the source electrode ground connection of the metal-oxide-semiconductor 31；
The other end of the resistance R30 is connect with the output end of the anti-short-circuit unit 23.
As shown in figure 5, for the electric discharge of discharge module 21 in the circuit of the first multi partition backlight drive of the embodiment of the present invention
Circuit diagram.Wherein, the anti-short-circuit unit 23 is by taking diode as an example.
Specifically, the anode per backlight L all the way in the subregion backlight 12 is all connected, there are one diode, two poles
The output end of pipe is connect with resistance R30, and the other end of resistance R30 is connect with the drain electrode of the metal-oxide-semiconductor 31, the metal-oxide-semiconductor 31
Source electrode is grounded, and the grid of the metal-oxide-semiconductor 31 is connect with first controller 32.
Wherein, first controller 32 is used to control cut-off/conducting (cut-off or conducting) state of the metal-oxide-semiconductor 31,
After being disconnected with the second switch K2, first controller 32 controls described the backlight L being connected with second switch K2
Metal-oxide-semiconductor 31 is connected.
Wherein, first controller 32 includes but not limited to some or all of following：
FPGA (Field-Programmable Gate Array, field programmable gate array), CPU (Central
Processing Unit, central processing unit), MCU (Micro controller Unit, micro-control unit).
It is specifically, the backlight L being connected with second switch K2 is with the second switch K2 after disconnecting, i.e., described with the
When the backlight L accesses that two switch K2 are connected are low level, the electric discharge that first controller 32 exports high level is enabled,
Keep the metal-oxide-semiconductor 31 in the conduction state, the discharge module 21 is started to work, the back of the body being connect with second switch K2 before release
Electricity in light source L and the conducting wire being connected with the backlight L.
In embodiments of the present invention, when adjacent two-way backlight L is lit by supply voltage in subregion backlight 12, phase
There are the intermittent times between two adjacent supply voltages.Intermittent time between two neighboring supply voltage is first control
The time that device 32 works, i.e. output discharge the enabled time, and first controller 32 controls the conducting of the metal-oxide-semiconductor 31 at this time,
And then discharge module 21 is made to work.
To share four road backlights (L1, L2, L3, L4) in subregion backlight 12, and four road backlights share backlight all the way
For driving, 12 Zhong of subregion backlight, tetra- road backlights need four supply voltage VLED1~VLED4, when supply voltage is
Gao Shi, backlight L are lit, and when supply voltage is low, backlight L is in OFF state.
As shown in fig. 6, power supply timing figure when being multiplexed for four tunnel provided in an embodiment of the present invention, in one cycle, four
Road backlight (L1, L2, L3, L4) is lit successively, in subregion backlight 12 per the time that all the way backlight L is lit when be
Consistent, therefore a cycle corresponding period is divided into four periods, each period is lit by backlight L
Time and two neighboring supply voltage between intermittent time composition.
By taking a cycle is 60Hz (period 16.67ms) as an example, 60Hz is divided into four periods, each time
Section is 240Hz (period 4.17ms), it is assumed that the time that each backlight L is lighted is 4ms, intermittent time 0.17ms.
As can be known from Fig. 6, first time period, when the intermittent time is a, VLED1 is low, and first via backlight L1, which is in, not to be had
The state lighted, the 4th road backlight L4 are also at the state that do not light, and discharge module 21 is started to work at this time, but at this time
What is discharged is the remaining electricity in the 4th road backlight L4 and the conducting wire being connected with the 4th road backlight L4；In period b
Interior, VLED1 is height, and first via backlight L1 is lit；Second time period, when the intermittent time is c, VLED1 is low, and VLED2 is
It is low, the remaining electricity in first via backlight L1 and the conducting wire being connected with first via backlight L1 is discharged at this time；In the time
In section d, VLED2 is height, and the second road backlight L2 is lit at this time；The third period, the intermittent time be e when, VLED2 be it is low,
VLED3 is low, discharges the remaining electricity in the second road backlight L2 and the conducting wire being connected with the second road backlight L2 at this time；
In period f, VLED3 is height, and third road backlight L3 is lit；The third period, when the intermittent time is g, VLED3 is low,
VLED4 is low, discharges the remaining electricity in third road backlight L3 and the conducting wire being connected with third road backlight L3 at this time；
In period f, VLED4 is height, and the 4th road backlight L4 is in illuminating state at this time, and above-mentioned is more points in technical solution of the present invention
The workflow of area's backlight drive circuit in one cycle.
Specifically, when discharge module 21 works, backlight L in release subregion backlight 12 and with the backlight
The schematic diagram of remaining capacity in the conducting wire that source L is connected, as shown in 7 figures, when being control of discharge provided in an embodiment of the present invention
Sequence figure.
As can be known from Fig. 7, when the VLED1 is low, when VLED2 is low, i.e., the described supply voltage VLED1 and VLED2
When in the intermittent time, electric discharge enables when being high, and discharge module 21 is started to work, as long as control VLED releases to VLED-Vf's
Voltage is hereinafter, backlight L would not be lit；Wherein, required voltage when the Vf is the LED conductings in backlight L.
In embodiments of the present invention, improved multi partition backlight drive circuit is due to including discharge module 21,
The electricity ratio released within a certain period of time is more without improving the electricity released before；If or release identical electricity, include
The multi partition backlight drive circuit of discharge module 21 is faster than the multi partition backlight drive circuit velocity of discharge before improvement, most short
Electricity in backlight L and the conducting wire being connected with the backlight L is discharged in time, can be maximally reduced pair
The influence of VLED power supplies, while so that user is not observed backlight L and the phenomenon that slightly lighting occur.
Mode two：The discharge cell 22 includes resistance R30.
Optionally, one end of the resistance R30 is connect with the output end of the anti-short-circuit unit 23, the resistance R30's
The other end is grounded.
As shown in figure 8, for discharge module 21 in second of multi partition backlight drive circuit provided in an embodiment of the present invention
Discharge circuit schematic diagram；The anti-short-circuit unit 23 is by taking diode as an example.
Specifically, anode of the subregion backlight 12 per the backlight L described all the way is all connected there are one diode, diode
Output end is connect with resistance R30, resistance R30 ground connection.After the anode of the backlight L is disconnected with the second switch K2, by
Anti- short-circuit unit 23 and discharge cell 22 in the discharge module 21 with still in conducting state, at this time backlight L and with
It is discharged through overdischarge module 21 after voltage in the conducting wire that backlight L is connected.
Specifically, in embodiments of the present invention, the resistance R30 can be that multiple resistance R30 adopt series, parallel or string simultaneously
Join and form after the mode that is combined connects, i.e., may include multiple resistance R30 in the discharge cell 22.
Include at least resistance R30 as shown in Fig. 9 (a)-Fig. 9 (c), in discharge cell 22 according to the present invention, and at least
Resistance R30 is connected by series connection and/or parallel way.I.e.：At least resistance R30 can be connected only by series system for this,
Can also only be connected by parallel way, alternatively, connected in such a way that series, parallel is combined, the present invention not to this into
Row is specific to be limited.Specifically, as shown in Fig. 9 (a), which includes three resistance R30, and these three resistance R30 is logical
Series system is crossed to link together.As shown in Fig. 9 (b), which includes three resistance R30, and these three resistance R30
It is linked together by parallel way.As shown in Fig. 9 (c), which includes four resistance R30, wherein two resistance
R30 is connected in series with other two resistance R30.It should be noted that specifically containing in the discharge cell 22 several
How to be connected between resistance R30 and each resistance R30 mainly by manually to multi partition backlight drive circuit according to actual needs
It is configured.
In force, after the backlight L and the second switch K2 are disconnected, the backlight L and with the backlight L
Electricity in the conducting wire being connected is released by anti-short-circuit unit 23 and discharge cell 22, due to the electricity quilt in backlight L
Release, therefore when switch is connect with other backlights L, under the first metal-oxide-semiconductor 13 is in the conduction state, the backlight L will not
The case where being lit.
Embodiment two, the discharge module include that there are one discharge cell 22 and an anti-short-circuit units 23.
Optionally, the discharge module 21 includes a discharge cell 22 and anti-short-circuit unit 23, a first switch
K1 and second controller 33；
The input terminal of the anti-short-circuit unit 23 is connect by first switch K1 with the anode of the multichannel backlight L, institute
The output end for stating anti-short-circuit unit 23 is connect with the input terminal of the discharge cell 22；
The output end of the discharge cell 22 is grounded；
As shown in Figure 10, be the third multi partition backlight drive of the embodiment of the present invention circuit in discharge module 21 it is specific
Structural schematic diagram, for containing four road backlights (L1, L2, L3, L4) in subregion backlight 12.
As can be known from Fig. 10, there are one anti-short-circuit unit 23 and discharge cells 22, i.e. four tunnels for the correspondence of subregion backlight module 12
Backlight (L1, L2, L3, L4) shares an anti-short-circuit unit 23 and a discharge cell 22.Wherein, four road backlights (L1,
L2, L3, L4) first switch K1 is provided between anti-short-circuit unit 23, and it is provided with second controller 33, second controller 33
Opened/closed (open or close) state for controlling first switch K1.
Specifically, determining when the intermittent time, backlight L was discharged all the way, the control of second controller 33 first
Switch K1 is connected on the backlight L to discharge, is that backlight L is connected with anti-short-circuit unit 23 and discharge cell 22,
Carry out subsequent discharge operation.
For example, when determination needs to discharge to the second road backlight L2, second controller 33 controls first switch at this time
K1 is connected with anti-short-circuit unit 23, carries out discharge operation.
In force, the state that first switch K1 is controlled by second controller 33, makes the backlight L to discharge
After being connected with anti-short-circuit unit 23, the electricity in the conducting wire being connected in backlight L and with the backlight L is discharged, and then work as
When second switch K2 is closed and the first metal-oxide-semiconductor 13 is connected, the backlight L that should not be lit is not in showing of slightly lighting
As.
Wherein, the discharge cell 22 is specifically introduced below there are a variety of connection types.
Mode one, the discharge cell include：Resistance R30, metal-oxide-semiconductor 31 and the first controller 32；
Optionally, the grid of the metal-oxide-semiconductor 31 is connect with first controller 32, the drain electrode of the metal-oxide-semiconductor 31 and institute
State one end connection of resistance R30, the source electrode ground connection of the metal-oxide-semiconductor 31；
The other end of the resistance is connect with the output end of the anti-short-circuit unit.
As shown in figure 11, it is discharge module 21 in the third multi partition backlight drive circuit provided in an embodiment of the present invention
Discharge circuit schematic diagram；The anti-short-circuit unit 23 is by taking diode as an example.
Specifically, first switch K1 is connected with diode, the output end of diode is connect with resistance R30, resistance R30's
The other end is connect with the drain electrode of the metal-oxide-semiconductor 31, the source electrode of the metal-oxide-semiconductor 31 ground connection, the grid of the metal-oxide-semiconductor 31 and described the
One controller 32 connects.
Wherein, first controller 32 is used to control cut-off/conducting state of the metal-oxide-semiconductor 31, when determine with it is described
After the backlight L that second switch K2 the is connected and second switch K2 is disconnected, first controller 32 controls the metal-oxide-semiconductor
Conducting.
Specifically, after being disconnected to the backlight L the connecting and second switch K2 with second switch K2, second control
Device 33 controls first switch K1 and is closed, and connects backlight L and diode, while the first controller 32 controls the metal-oxide-semiconductor and is in
Conducting state makes backlight L and diode, resistance R30 constitute circuit, discharges backlight L and is connected with the backlight L
Electricity in conducting wire.
For example, the backlight L being connected with second switch K2 is the second road backlight L2, as second switch K2 and described the
After two road backlight L2 are disconnected, second controller 33 controls first switch K1 and connects the second road backlight L2 and diode, simultaneously
First controller 32 control metal-oxide-semiconductor it is in the conduction state, discharge at this time the second road backlight L2 and with second road backlight
Electricity in the conducting wire that L2 is connected.
In force, determining that second controller 33 controls first switch K1 and is closed when needing to carry out discharge operation, first
Controller 32 controls the metal-oxide-semiconductor conducting, and then keeps the discharge module 21 in the conduction state, and discharge module 21 starts work
Make, discharges remaining electricity in backlight L and the conducting wire being connected with the backlight L, so that backlight is not appeared in should not
The phenomenon that being lit when being lit.
Mode two, the discharge cell 22 include resistance R30；
Optionally, one end of the resistance R30 is connect with the output end of the anti-short-circuit unit 23, the resistance R30's
The other end is grounded.
As shown in figure 12, it is discharge module 21 in the 4th kind of multi partition backlight drive circuit provided in an embodiment of the present invention
Discharge circuit schematic diagram；The anti-short-circuit unit 23 is by taking diode as an example.
Specifically, one end of first switch K1 is connect with the backlight L in subregion backlight 12, the other end connects with diode
It connects, diode is also connect with resistance R30, the other end ground connection of resistance R30.In the anode and second switch of the L of the backlight
After K2 is disconnected, second controller 33 controls first switch K1 and is closed, and connects the backlight L to discharge and is connect with diode
It is logical, so that the discharge cell 22 in discharge module 21 is constituted circuit with anti-short-circuit unit 23 and backlight L, discharge backlight L and with
Electricity in the conducting wire that backlight L is connected.
In force, after the backlight L and second switch K2 is disconnected, second controller 33 controls first switch
K1 discharges the electricity in backlight L and the conducting wire being connected with backlight L, and the backlight L is not in the feelings being lit
Condition.
It should be noted that the first switch K1 is multiplexer switch in the above method.Wherein, it described first opens
It can also be common switch to close K1.
When the first switch K1 is regular tap, first switch K1, the second control are all connected with per backlight L all the way
The quantity of device 33 can be consistent with the quantity of first switch K1, can also a second controller 33 control multiple first and open
Close K1.As shown in figure 13, in the circuit of the 4th kind of multi partition backlight drive provided in an embodiment of the present invention discharge module 21 tool
Body structural schematic diagram, by taking a second controller 33 controls multiple first switch K1 as an example, under first switch K1 described in figure
Broken line representation controls first switch K1 by second controller 33.
Specifically, when need to certain backlight L discharges all the way when, second controller K2 controls L pairs of the backlight
The first switch K1 answered is closed.For example, determination discharges to the second road backlight L2, second controller 33 controls the second road back of the body
The corresponding first switch K1 of light source L2 are closed, and carry out discharge operation.
Embodiment three：Include multiple discharge cells 22 in the discharge module 21.
Optionally, in the discharge module 21 include multiple discharge cells 22, the discharge cell 22 and backlight L
It corresponds；
The input terminal of the discharge cell 22 is connect with the anode of the backlight L, the output end of the discharge cell 22
Ground connection.
As shown in figure 14, be the 5th kind of multi partition backlight drive of the embodiment of the present invention circuit in discharge module 21 it is specific
Structural schematic diagram, for containing four road backlights (L1, L2, L3, L4) in subregion backlight 12.
Wherein, it is all connected with discharge cell 22 per the anode of backlight L all the way, as can be known from Fig. 14, first via backlight
L1 is connected with the first discharge cell 22 (being indicated with discharge cell 1 in figure)；Second road backlight L2 and the second road discharge cell
22 are connected；Third road backlight L3 is connected with third road discharge cell 22；4th road backlight L4 and the electric discharge of the 4th tunnel are single
Member 22 is connected；And it is all grounded per the output end of discharge cell 22 all the way.
In force, often backlight L is connected with discharge cell 22 all the way, and each discharge cell 22 is grounded, when need
When carrying out discharge operation to backlight L, the voltage in backlight L is transmitted to discharge module 21 from the anode of backlight L,
It is finally released, due to there is no voltage in backlight L, when switch is connect with other backlights L, at the first metal-oxide-semiconductor 13
Under conducting state, the backlight L will not be appeared in when should not light and the phenomenon that of being lit.
In embodiments of the present invention, it when all being corresponded to there are one when discharge cell 22 per backlight L all the way, can also discharge
Anti- short-circuit unit 23 is provided between unit 22 and backlight L, specifically, being the 6th kind of the embodiment of the present invention as shown in figure 15
The concrete structure schematic diagram of discharge module 21 in the circuit of multi partition backlight drive.
Wherein, the discharge cell 22 is specifically introduced below there are a variety of connection types.
Mode one：The discharge cell 22 includes：Resistance R30, metal-oxide-semiconductor 31 and the first controller 32；
Optionally, the discharge cell 22 includes：Resistance R30, metal-oxide-semiconductor 31, the first controller 32；
The grid of the metal-oxide-semiconductor 31 is connect with first controller 32, the drain electrode of the metal-oxide-semiconductor 31 and the resistance
R30 connections, the source electrode ground connection of the metal-oxide-semiconductor 31；
The other end of the resistance R30 is connect with the anode of the backlight L.
Wherein, first controller 32 is used to control cut-off/conducting state of the metal-oxide-semiconductor 31, in the backlight L
First controller 32 controls the conducting of the metal-oxide-semiconductor 31 after power-off.
As shown in figure 16, it is the electric discharge of discharge module 21 in the circuit of the 5th kind of multi partition backlight drive of the embodiment of the present invention
Circuit diagram.It is all connected with resistance R30, the drain electrode of the other end and metal-oxide-semiconductor 31 of resistance R30 per the anode of backlight L all the way
Connection, the source electrode ground connection of the metal-oxide-semiconductor 31, the grid of the metal-oxide-semiconductor 31 are connect with first controller 32, first control
Device 32 processed exports high level after backlight L power-off, is connected for controlling the metal-oxide-semiconductor 31.
Specifically, as shown in figure 16, after first via backlight L1 and the disconnection of the switch 1, upper first controller
32 output high level, control the conducting of the metal-oxide-semiconductor 31, at this time first via backlight L1, and resistance R30, metal-oxide-semiconductor 31 forms access,
Remaining capacity in first via backlight L1 and the conducting wire being connected with first via backlight L1 passes through resistance R30,31 quilt of metal-oxide-semiconductor
Discharge module 21 discharges, therefore first via backlight L1 is not at the state being lit.
Mode two：The discharge cell 22 includes resistance R30.
Optionally, the discharge cell 22 includes resistance R30；
One end of the resistance R30 is connect with the anode of the backlight L, the other end ground connection of the resistance R30.
As shown in figure 17, it is discharge module 21 in the circuit of the 6th kind of multi partition backlight drive provided in an embodiment of the present invention
Discharge circuit schematic diagram.The specific anode per backlight L all the way is all connected with resistance R30, and each resistance R30's is another
End is all grounded.At this time after backlight L and second switch K2 are disconnected, since anode and the resistance R30 of the backlight L are formed again
Residue in one circuit, therefore after backlight L and second switch K2 is disconnected, backlight L and the conducting wire being connect with backlight L
Electricity can be released by resistance R30, therefore backlight L is not at the state being lit.
It should be noted that in the above-described embodiments, the resistance R30 in discharge module 21 can be at least one resistance
What R30 series, parallel or connection in series-parallel were formed.
In embodiments of the present invention, control device can be only set, switched in the embodiment of the present invention for controlling
It is closed and the closure conducting state of metal-oxide-semiconductor, the control device can be the backlight processing unit 16 in available circuit.I.e. in electricity
The first controller 32 and second controller 33 can be not provided in the design on road, by backlight processing unit control metal-oxide-semiconductor cut-off/
The cut-off/close of conducting state and first switch K1.Specifically, being another kind provided in an embodiment of the present invention as shown in figure 18
The concrete structure schematic diagram discharged in the circuit of multi partition backlight drive.Wherein, first switch K1, second switch K2 and metal-oxide-semiconductor
31 are all controlled by backlight processing unit 16.
Optionally, the embodiment of the present invention also provides a kind of display device, and the display includes being carried in above-mentioned technical proposal
Any one the described backlight drive circuit supplied.
Display device provided by the present invention can be mobile phone, TV, tablet computer, laptop, digital camera, navigation
In any product or component with display function such as instrument.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of system (equipment) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every in flowchart and/or the block diagram
The combination of flow and/or box in one flow and/or box and flowchart and/or the block diagram.These computers can be provided
Processing mould of the program instruction to all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing systems
Block, to generate a machine so that the instruction executed by the processing module of computer or other programmable data processing systems
It generates for realizing the work(specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes
The method of energy.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing systems with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing systems so that counted
Series of operation steps are executed on calculation machine or other programmable systems to generate computer implemented processing, in computer or
The instruction executed on other programmable systems is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. a kind of multi partition backlight drive circuit, which is characterized in that the multi partition backlight drive circuit includes：Multichannel backlight；
And what is connect with the backlight anode retains electricity for discharging in the backlight and the conducting wire being connected with the backlight
The discharge module of amount.
2. driving circuit as described in claim 1, which is characterized in that the electric discharge mould includes that discharge cell and anti-short circuit are single
Member；
The anti-short-circuit unit is connect with the anode of the backlight；
The input terminal of the discharge cell is connect with the output end of the anti-short-circuit unit, the output termination of the discharge cell
Ground.
3. driving circuit as claimed in claim 2, which is characterized in that the discharge cell includes：Resistance, OH are brilliant
Body pipe metal-oxide-semiconductor and the first controller；
The grid of the metal-oxide-semiconductor is connect with first controller, and the drain electrode of the metal-oxide-semiconductor is connect with one end of the resistance,
The source electrode of the metal-oxide-semiconductor is grounded；
The other end of the resistance is connect with the output end of the anti-short-circuit unit；
The controller is used to control cut-off/conducting state of the metal-oxide-semiconductor, first control after backlight power-off
Device controls the metal-oxide-semiconductor conducting.
4. driving circuit as claimed in claim 2, which is characterized in that the discharge cell includes resistance；
One end of the resistance is connect with the output end of the anti-short-circuit unit, the other end ground connection of the resistance.
5. driving circuit according to any one of claims 1-4, which is characterized in that in the discharge module and the backlight
Anode between further include first switch.
6. driving circuit as claimed in claim 5, which is characterized in that further include second controller in the driving circuit；Its
In, the second controller is used to control the open/closed state of the first switch, described the after backlight power-off
Two controllers control the first switch and are closed.
7. the driving circuit as described in claim 2~3 is any, which is characterized in that the anti-short-circuit unit includes diode.
8. a kind of multi partition backlight drive circuit, which is characterized in that the multi partition backlight drive circuit, including：Converter,
Pwm driver, backlight processing unit, multichannel backlight and connect with the backlight anode for discharging the backlight
And the discharge module of electricity is retained in the conducting wire being connected with the backlight；
Wherein, the input terminal of the converter is connect with power supply, output end by second switch and the multichannel backlight just
End connection；
The pwm driver is connect with the backlight processing unit and the converter, and by the first metal-oxide-semiconductor with it is described more
The negative terminal and sample circuit of road backlight connect；
The backlight processing unit is for controlling the pwm driver, the converter and the second switch.
9. a kind of display device, which is characterized in that the multi partition backlight drive circuit including any one of claim 1-8.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010979849.3A CN112086074A (en) | 2018-05-16 | 2018-05-16 | Multi-partition backlight driving circuit and display device |
| CN201810470297.6A CN108461069B (en) | 2018-05-16 | 2018-05-16 | Multi-partition backlight driving circuit and display device |
| PCT/CN2018/107689 WO2019218568A1 (en) | 2018-05-16 | 2018-09-26 | Backlight driving circuit, backlight driving method, and display device |
| US16/256,175 US10834795B2 (en) | 2018-05-16 | 2019-01-24 | Backlight drive circuit, backlight driving method, and display device |
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| CN201810470297.6A CN108461069B (en) | 2018-05-16 | 2018-05-16 | Multi-partition backlight driving circuit and display device |
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| KR20200034849A (en) * | 2018-09-21 | 2020-04-01 | 삼성전자주식회사 | Light emitting diode module, light emitting diode driver, and light emitting diode lighting apparatus |
| KR102650693B1 (en) * | 2018-09-21 | 2024-03-25 | 삼성전자주식회사 | Light emitting diode module, light emitting diode driver, and light emitting diode lighting apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112086074A (en) | 2020-12-15 |
| CN108461069B (en) | 2020-09-25 |
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