CN108597457A - a kind of backlight driving method, device and display device - Google Patents
a kind of backlight driving method, device and display device Download PDFInfo
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- CN108597457A CN108597457A CN201810293024.9A CN201810293024A CN108597457A CN 108597457 A CN108597457 A CN 108597457A CN 201810293024 A CN201810293024 A CN 201810293024A CN 108597457 A CN108597457 A CN 108597457A
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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
Abstract
The embodiment provides a kind of backlight driving method, device and display devices, it is related to display technology field, solve in the prior art due in liquid crystal display panel pixel electrode charging need the regular hour, it is located at the liquid crystal of charging stage not deflect completely, cause the backlight that back light unit exports that can not effectively penetrate liquid crystal, the part backlight that the back light unit exports can only be converted into luminance information, cause the waste of electric energy.The device includes detection unit, the charge number for when detecting the field sync signal of back light unit, detecting the pixel electrode of pixel unit in the corresponding display unit of back light unit；Processing unit, for when the charge number of the pixel electrode of pixel unit in the corresponding display unit of back light unit for determining detection unit detection meets predetermined condition, opening back light unit.The embodiment of the present invention is used for the manufacture of display device.
Description
Technical field
The present invention relates to a kind of display technology field more particularly to backlight driving method, device and display devices.
Background technology
In the prior art, display device as shown in Figure 1 include driving circuit -5 and the backlight module -1 arranged successively, under
Polarizing film -2, liquid crystal module -3 and upper polarizer -4；Wherein, liquid crystal module -3 includes the pixel unit of array arrangement, each picture
Plain unit includes：Tin indium oxide (full name in English：Indium tin oxide, referred to as：ITO) pixel electrode -30, public electrode 31
And the liquid crystal -32 between ITO pixel electrodes -30 and public electrode 31, each ITO pixel electrodes -30 and public electrode
31 form an independent pixel electrode, and backlight module -1 includes the back light unit of multiple array arrangements, each back light unit pair
At least one pixel unit is answered, includes at least one light emitting diode (full name in English in back light unit：Light Emitting
Diode, referred to as：LED)；After driving circuit -5 receives the first field sync signal Vsync, ITO pixel electrodes -30 are powered simultaneously
Start stored charge, and since there are potentials between ITO pixel electrodes -30 and public electrode 31 during charge accumulated
Difference, therefore electric field is formed between ITO pixel electrodes -30 and public electrode 31, the electric field formed at this time can drive ITO pixels electric
Liquid crystal between pole -31 and public electrode 31 deflects so that the emergent ray of backlight module -1 penetrates liquid crystal module -3；Together
When, after backlight module -1 receives the Vsync, corresponding back light unit is opened in control.
However, as shown in Fig. 2, the degree that liquid crystal deflects in pixel unit includes following two stages：
First stage, the corresponding pixel electrode of pixel unit receive Vsync when the pixel electrode is fully charged, usually
The referred to as charging stage is located in the pixel unit of charging stage at this time since pixel electrode charging needs the regular hour
Liquid crystal do not deflect completely, cause back light unit export backlight can not effectively penetrate pixel unit in liquid crystal -32, i.e.,
The part backlight that the back light unit exports can only be converted into luminance information by the corresponding pixel unit of back light unit 1, cause electric energy
Waste.
Second stage, the pixel electrode are fully charged when receiving next Vsync, commonly referred to as the stabilization sub stage, at this time
Liquid crystal in the pixel electrode deflects completely, and the backlight of back light unit output can be completely through the liquid in pixel unit
Crystalline substance -32.
It can be seen from the above, in the prior art due in liquid crystal display panel pixel electrode charging need the regular hour, that is, to be located at
Liquid crystal in the pixel electrode of charging stage does not deflect completely, causes the backlight that back light unit exports can not effective permeate
The part backlight that the back light unit exports can only be converted into luminance information, cause the waste of electric energy by crystalline substance.
Invention content
The embodiment of the present invention provides a kind of backlight driving method, device and display device, solve in the prior art by
Pixel electrode charging needs the regular hour in liquid crystal display panel, that is, the liquid crystal being located in the pixel electrode of charging stage is not complete
Full-scale deflection causes the backlight that back light unit exports that can not effectively penetrate liquid crystal, can only carry on the back the part that the back light unit exports
Light is converted into luminance information, the problem of causing the waste of electric energy.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that：
First aspect, the embodiment of the present invention provide a kind of backlight drive device, are applied to display device, display device packet
The backlight module being cascading, liquid crystal module are included, backlight module includes multiple back light units of array arrangement, liquid crystal module
Including multiple display units, each display unit includes the pixel unit of M row N column arrays arrangement, and display unit corresponds at least one
A back light unit, including：Detection unit, for when detecting the field sync signal of back light unit, detection back light unit to correspond to
Display unit in pixel unit pixel electrode charge number；Processing unit, for when the backlight for determining detection unit detection
When the charge number of the pixel electrode of pixel unit meets predetermined condition in the corresponding display unit of unit, back light unit is opened, M is
Integer more than or equal to 1, N are the integer more than or equal to 1.
Optionally, processing unit is specifically used for when in the corresponding display unit of back light unit for determining detection unit detection
When the charge number of the pixel electrode of any one pixel unit is greater than or equal to charge number threshold value, back light unit is opened.
Optionally, processing unit is specifically used in the corresponding display unit of back light unit for determining detection unit detection,
When the charge number of the pixel electrode of the pixel unit of the predetermined quantity of n-th row is all higher than or is equal to charge number threshold value, backlight is opened
Unit, n are integer and n ∈ N.
Optionally, processing unit is specifically used for when the corresponding back light unit pair of back light unit for determining detection unit detection
In the display unit answered, the charge number of the pixel electrode of the pixel unit of the predetermined quantity of the n-th row is all higher than or is equal to charge number
When threshold value, back light unit is opened after the preset time that is delayed, n is integer and n ∈ N.
Second aspect, the embodiment of the present invention provide a kind of backlight driving method, are applied to the back of the body provided such as first aspect
Drive unit, including：When detecting the field sync signal of back light unit, picture in the corresponding display unit of detection back light unit
The charge number of the pixel electrode of plain unit；When the electricity for determining the pixel electrode of pixel unit in the corresponding display unit of back light unit
When lotus number meets predetermined condition, back light unit is opened, M is the integer more than or equal to 1, and N is the integer more than or equal to 1.
Optionally, when determining that it is pre- that the charge number of the pixel electrode of pixel unit in the corresponding display unit of back light unit meets
When fixed condition, opening back light unit includes：When determining in the corresponding display unit of back light unit, the pixel of any one pixel unit
When the charge number of electrode is greater than or equal to charge number threshold value, back light unit is opened.
Optionally, when determining that it is pre- that the charge number of the pixel electrode of pixel unit in the corresponding display unit of back light unit meets
When fixed condition, opening back light unit includes：When determining in the corresponding display unit of back light unit, the picture of the predetermined quantity of the n-th row
When the charge number of the pixel electrode of plain unit is all higher than or is equal to charge number threshold value, back light unit is opened, n is integer and n ∈ N.
Optionally, when determining that it is pre- that the charge number of the pixel electrode of pixel unit in the corresponding display unit of back light unit meets
When fixed condition, opening back light unit includes：When determining in the corresponding display unit of back light unit, the picture of the predetermined quantity of the n-th row
When the charge number of the pixel electrode of plain unit is all higher than or is equal to charge number threshold value, back light unit, n are opened after the preset time that is delayed
For integer and n ∈ N.
The third aspect, the embodiment of the present invention provide a kind of display device, include any person's back provided such as first aspect
Drive unit.
A kind of backlight driving method of the embodiment of the present invention offer, device and display device are corresponded to when obtaining back light unit
At least one pixel unit field sync signal when, the charge number of the corresponding pixel electrode of detection pixel unit, and when true
When the charge number of the corresponding pixel electrode of at least one pixel unit meets predetermined condition calmly, at least one pixel unit pair is opened
The back light unit answered, i.e., when the charge number of pixel electrode is unsatisfactory for predetermined condition, the corresponding backlight of at least one pixel unit
Unit will not be opened, to realize the corresponding back light unit of at least one pixel unit of delayed start-up, due to field sync signal
Synchronizing cycle it is certain, therefore the backlight driving method provided according to an embodiment of the invention reduces at least one pixel unit
The opening time of corresponding back light unit thereby reduces the power consumption of backlight module, solves in the prior art due to liquid crystal surface
Pixel electrode charging needs the regular hour in plate, that is, the liquid crystal being located in the pixel electrode of charging stage does not deflect completely,
Cause the backlight that back light unit exports that can not effectively penetrate liquid crystal, the part backlight which exports can only be converted into
Luminance information, the problem of causing the waste of electric energy.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the pixel unit of liquid crystal display panel in the prior art；
Fig. 2 is backlight open time diagram in the prior art；
Fig. 3 is a kind of flow diagram for backlight driving method that the embodiment of the present invention provides；
Fig. 4 is a kind of another flow diagram for backlight driving method that the embodiment of the present invention provides；
Fig. 5 is a kind of another flow diagram for backlight driving method that the embodiment of the present invention provides；
Fig. 6 is a kind of another flow diagram for backlight driving method that the embodiment of the present invention provides；
Fig. 7 is the schematic diagram of the backlight open time for backlight driving method that the embodiment of the present invention provides a kind of；
Fig. 8 is another signal of the backlight open time for backlight driving method that the embodiment of the present invention provides a kind of
Figure；
Fig. 9 is another signal of the backlight open time for backlight driving method that the embodiment of the present invention provides a kind of
Figure；
Figure 10 is a kind of structural schematic diagram for backlight drive device that the embodiment of the present invention provides.
Reference numeral：
Backlight drive device -10；
Detection unit -101；Processing unit -102.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In actual application, usually pass through two in display device (introduction in specific structural reference background technology)
Drive integrated circult (full name in English：Integrated Circuit, referred to as：IC backlight module and liquid crystal module) are controlled respectively；
Wherein, the driving IC for controlling liquid crystal module receives the first field sync signal, and liquid crystal module is controlled according to the first field sync signal
Grid line simultaneously drives source electrode line to charge to pixel electrode, realizes the deflection of liquid crystal in control pixel unit；Control backlight module
It drives IC to receive the second field sync signal, being turned on or off for back light unit is controlled according to the second field sync signal.
Since backlight module and liquid crystal module pass through two different driving IC controls so that when liquid crystal module receives the
After one field sync signal, the liquid crystal of corresponding pixel unit has begun to overturning, while backlight module can also receive second
Synchronizing signal so that the corresponding back light unit of pixel unit is opened, and what such pixel unit can only export the back light unit
Part backlight is converted into luminance information；Therefore, the embodiment of the present invention in order to ensure backlight module and liquid crystal module display when
Between it is synchronous, drive IC by the way that third is arranged or the driving IC of liquid crystal module will be controlled and control the driving IC of backlight module and close
And at a driving IC；Specifically, when driving IC by third or the driving IC and control backlight of liquid crystal module being controlled
The driving IC of module is merged into a driving IC, controls liquid crystal module and backlight module realization method is as follows：
When display device includes controlling driving IC, the driving IC for controlling backlight module and the third driving of liquid crystal module
When IC, third drives the times that drives IC and the driving IC that controls backlight module of the IC for synchronous control liquid crystal module, this
When third driving IC issue control signal (including the first field sync signal and second according to the image data that should show is received
Synchronizing signal) to the driving IC for the controlling liquid crystal module and driving IC for controlling backlight module, (the second field sync signal is of the invention
The field sync signal that back light unit in embodiment one and embodiment two in backlight module receives)；
Alternatively,
When display device includes a driving IC (the driving IC of liquid crystal module will be controlled and control the driving of backlight module
IC is merged into a driving IC), driving IC issues control signal (including first same according to receiving the image data that should show
Walk signal and the second field sync signal) to the driving IC for the controlling liquid crystal module and driving IC for controlling backlight module, (second is same
Step signal is the field sync signal that the back light unit in the embodiment of the present invention one and embodiment two in backlight module receives)；
Therefore, liquid crystal module controls the liquid crystal deflection of pixel unit according to the first field sync signal, and backlight module is according to the second field synchronization
Signal controls the delayed start-up of back light unit corresponding with the liquid crystal display, to reduce the power consumption of liquid crystal module,
Concrete implementation mode is as follows：
Embodiment one,
The embodiment of the present invention provides a kind of backlight driving method, is applied to display device, and display device includes layer successively
The backlight module of folded setting, liquid crystal module, backlight module includes multiple back light units of array arrangement, and liquid crystal module includes multiple
Display unit, each display unit include the pixel unit of M row N column arrays arrangement, and display unit corresponds at least one backlight list
Member includes as shown in Figure 3：
S101, when detecting the field sync signal of back light unit, pixel in the corresponding display unit of detection back light unit
The charge number of the pixel electrode of unit.
It should be noted that after the driving IC of control liquid crystal module receives the first field sync signal in practical applications,
The charge number for the pixel electrode that pixel electrode is formed with public electrode can be gradually increased until the specified electricity for reaching the pixel electrode
Lotus number；Wherein, according to formulaIt is found that since the distance between public electrode and pixel electrode are certain, pixel electricity
Voltage between pole and public electrode is directlyed proportional to the charge number between pixel electrode and public electrode, and wherein U indicates pixel electricity
Voltage between pole and public electrode, Q indicate that the charge number between pixel electrode and public electrode, D indicate pixel electrode and public affairs
The distance between common electrode；Again because the charge number on public electrode is certain, therefore the size and picture of the charge number of pixel electrode
The intensity electric field that is directly proportional, and being formed between pixel electrode and public electrode of the electric field formed between plain electrode and public electrode
Intensity it is directly proportional to the deflection intensity of the liquid crystal between the pixel electrode and public electrode；Therefore, pixel electricity in pixel unit
The charge number of pole can characterize the deflection intensity of liquid crystal in the pixel unit；Again because the emergent light of back light unit is through therewith
Corresponding pixel unit luminous flux is directly proportional to the deflection intensity of liquid crystal in the pixel unit, so passing through detection pixel unit pair
The charge number of the pixel electrode answered it is known that in the pixel unit liquid crystal deflection intensity, it will also be appreciated that corresponding at this time
Luminous flux is how many.
S102, when determining that it is predetermined that the charge number of the pixel electrode of pixel unit in the corresponding display unit of back light unit meets
When condition, back light unit is opened, M is the integer more than or equal to 1, and N is the integer more than or equal to 1.
It should be noted that the backlight driving method that embodiment through the invention provides, control and at least one picture
The driving IC of the corresponding back light unit of plain unit will not open the back light unit immediately after receiving the second drive signal, but
When determining that the charge number of the corresponding pixel electrode of at least one pixel unit meets predetermined condition (by backlight list known to step S101
The emergent light of member is directly proportional to the deflection intensity of liquid crystal in the pixel unit through corresponding pixel unit luminous flux, so
By the charge number of the corresponding pixel electrode of detection pixel unit it is known that in the pixel unit liquid crystal deflection intensity,
It is known that corresponding luminous flux is how many at this time) when, the back light unit is just opened, to reduce the time of backlight open,
Reduce the power consumption of liquid crystal module.
Specifically, since backlight module can not judge the deflection journey for the liquid crystal for including in each pixel unit in liquid crystal module
Degree, it is therefore desirable to be corresponded to according to the charge number of the corresponding pixel electrode of pixel unit to discriminate whether to need to open the pixel unit
Back light unit, and differentiate foundation be preset condition；Illustratively, preset condition includes：
1, in the corresponding display unit of back light unit, the charge number of the pixel electrode of any one pixel unit whether be more than or
Equal to charge number threshold value.
2, in the corresponding display unit of back light unit, the charge of the pixel electrode of the pixel unit of the predetermined quantity of the n-th row
Whether number is greater than or equal to charge number threshold value.
3, in the corresponding display unit of back light unit, the charge of the pixel electrode of the pixel unit of the predetermined quantity of the n-th row
Whether number is greater than or equal to charge number threshold value.
Therefore, the driving IC that control back light unit is turned on or off can be according to preset condition and the back light unit pair
The state of the charge number of the pixel electrode of pixel unit in the display unit answered, to discriminate whether to be turned on or off the backlight list
Member；The driving IC that specific control back light unit is turned on or off is turned on or off the reality of back light unit according to preset condition
Existing mode, is referred to realization method recorded in Fig. 4, Fig. 5 and Fig. 6, details are not described herein again.
Optionally, the embodiment of the present invention as shown in Figure 4 is provided in a kind of backlight driving method when determining back light unit pair
When the charge number of the pixel electrode of pixel unit meets predetermined condition in the display unit answered, opening back light unit includes：When true
Determine in the corresponding display unit of back light unit, the charge number of the pixel electrode of any one pixel unit is greater than or equal to charge number threshold
When value, back light unit is opened.
Illustratively, with the liquid crystal display panel include as shown in Figure 7 multiple display areas, backlight module includes multiple backlight areas
Domain, each display area correspond to a backlight area, and each display area includes the pixel unit of M rows N row, each backlight area
Interior includes at least one back light unit, and at least one back light unit is corresponding with the pixel unit that M rows N is arranged, and liquid crystal module
Scan mode is from left to right, to be illustrated for the mode progressively scanned from top to bottom：
Driving IC due to controlling liquid crystal module in actual application receive after the first field sync signal can from a left side to
The right side, at least one back light unit can be triggered that is, when scanning the pixel unit of the 1st row by progressively scanning pixel unit from top to bottom
It opens and (when determining that the charge number of the corresponding pixel electrode of at least one pixel unit meets predetermined condition, opens at least one
The corresponding back light unit of pixel unit), and when scanning the pixel unit of the 2nd row, it still can trigger at least one back light unit
It opens, until when scanning the pixel unit of M rows, still can trigger the unlatching of at least one back light unit；It is frequent in this way to touch
Hair at least one back light unit is turned on or off the service life that at least one back light unit will certainly be lost；Therefore, in order to prevent
Within the synchronizing cycle of the first field sync signal, at least one back light unit, the backlight that the embodiment of the present invention provides repeatedly are opened
Driving method, when determine the charge number of the pixel electrode of any of the corresponding display unit of back light unit pixel unit be more than or
When equal to charge number threshold value, back light unit is opened；That is, when in the corresponding display unit of back light unit, any one pixel
When the charge number of the pixel electrode of unit reaches charge number threshold value, the back light unit is opened in just control, until control backlight module
Driving IC when receiving next field sync signal, just close the back light unit；Although cannot reduce to the greatest extent in this way
Power consumption is (when may control the driving IC of liquid crystal module and being progressively scanned according to the first field sync signal, when scanning to the 2nd row pixel list
When first, the charge number of the corresponding pixel electrode of scanned pixel unit reaches charge number threshold value, and corresponding 3rd row is to the
The pixel unit of M rows does not scan, and the pixel unit only scanned can just penetrate light), backlight module is realized according to same
The delayed start-up that signal controls back light unit corresponding with the liquid crystal display is walked, to reduce the power consumption of liquid crystal module,
And backlight driving method provided in an embodiment of the present invention can make the display of liquid crystal display panel under identical backlight output power
Brightness is more uniform.
It should be noted that usually taking the pixel capacitance formed by pixel electrode and public electrode in actual application
Rated capacity as charge number threshold value；The sum of charging time, delay time and back light unit opening time believe equal to field synchronization
Number synchronizing cycle, wherein the charging time refer between pixel electrode and public electrode be in the charging stage duration, prolong
When the time refer to the difference for terminating the time that time and the back light unit of charging stage are opened between pixel electrode and public electrode, carry on the back
The light unit opening time refers to that time when back light unit is switched to open state by closed state is synchronous with field sync signal
The difference of the end time in period.
Optionally, the embodiment of the present invention as shown in Figure 5 is provided in a kind of backlight driving method when determining back light unit pair
When the charge number of the pixel electrode of pixel unit meets predetermined condition in the display unit answered, opening back light unit includes：When true
Determine in the corresponding display unit of back light unit, the charge number of the pixel electrode of the pixel unit of the predetermined quantity of the n-th row is all higher than
Or when equal to charge number threshold value, back light unit is opened, n is integer and n ∈ N.
It should be noted that the charge number of the pixel electrode of the pixel unit of the predetermined quantity of the n-th row includes：
1, the pixel electrode of the partial pixel unit of the n-th row charge number (it is illustrative, when being equal to 10 such as line number M, at this time
Predetermined quantity can be any one of 1,2,3,4,5,6,7,8,9, i.e., partial pixel unit can be H pixel unit, H
∈[1,2,3,4,5,6,7,8,9])。
2, the pixel electrode of each pixel unit of the n-th row charge number (when such as line number M is equal to 10, predetermined number at this time
Amount can be 10, i.e. each pixel unit refers to each pixel unit in 10 pixels).
Due to the use of the difference of environment, the numerical value of technical staff's sets itself " predetermined quantity " according to the actual needs is protected
Demonstrate,prove the display effect of display device.
Illustratively, with the liquid crystal display panel include as shown in Figure 8 multiple display areas, backlight module includes multiple backlight areas
Domain, each display area correspond to a backlight area, and each display area includes the pixel unit of M rows N row, each backlight area
Interior includes at least one back light unit, and at least one back light unit is corresponding with the pixel unit that M rows N is arranged, and liquid crystal module
Scan mode is from left to right, to be illustrated for the mode progressively scanned from top to bottom：
In order to prevent within the synchronizing cycle of the first field sync signal, at least one back light unit is repeatedly opened, it is of the invention
The backlight driving method that embodiment provides, when determining the pixel unit of M row Nth columns in the corresponding display unit of back light unit
When the charge number of pixel electrode is all higher than or is equal to charge number threshold value, back light unit is opened；A kind of achievable mode is to work as the back of the body
In the corresponding display unit of light unit, the charge number of the pixel electrode of the pixel unit of the predetermined quantity of the n-th row is all higher than or waits
In charge number threshold value, the back light unit is opened；Wherein, the length of the opening time of the back light unit is existed according to field sync signal
The brightness decision of this area image；Can greatly reduce in this way power consumption (may control the driving IC of liquid crystal module according to
When first field sync signal progressively scans, when scanning to M rows the 9th arranges the pixel unit of (vacation lets n equal 18), M rows the 1st
The charge number of the pixel electrode of the pixel unit of row is all higher than or is equal to charge number threshold value, and corresponding M rows the 10th are arranged to M rows
18th row pixel unit do not scan, the pixel unit only scanned can just penetrate light), realize backlight module according to
Synchronizing signal controls the delayed start-up of back light unit corresponding with the liquid crystal display, to reduce the work(of liquid crystal module
Consumption, and backlight driving method provided in an embodiment of the present invention can make the aobvious of liquid crystal display panel under identical backlight output power
Show that brightness is more uniform.
It should be noted that the scheme that above-mentioned steps execute usually is known as center alignment techniques；In actual application,
After the driving IC for controlling liquid crystal module receives the first field sync signal, due to driving picture using the mode of progressive scan
Plain unit, therefore can exist when the pixel unit that the pixel unit that scanning to the 1st row the 1st arranges is arranged with scanning to M rows the 1st and prolong
When；The sum of charging time, delay time and back light unit opening time are equal to the synchronizing cycle of field sync signal, wherein when charging
Between refer to the 1st row the 1st row pixel electrode and public electrode between be in duration of charging stage, delay time refers to the
Terminate the pixel electrode and public affairs that the time of charging stage arranges with M rows the 1st between pixel electrode and public electrode that 1 row the 1st arranges
Terminate the difference of the time of charging stage between common electrode, the back light unit opening time refers to the pixel electrode and public affairs that M rows the 1st arrange
Terminate the difference of the end time of the time of charging stage and the synchronizing cycle of field sync signal between common electrode.
Optionally, the embodiment of the present invention as shown in Figure 6 is provided in a kind of backlight driving method when determining back light unit pair
When the charge number of the pixel electrode of pixel unit meets predetermined condition in the display unit answered, opening back light unit includes：When true
Determine in the corresponding display unit of back light unit, the charge number of the pixel electrode of the pixel unit of the predetermined quantity of the n-th row is all higher than
Or when equal to charge number threshold value, back light unit is opened after the preset time that is delayed, n is integer and n ∈ N.
Illustratively, with the liquid crystal display panel include as shown in Figure 9 multiple display areas, backlight module includes multiple backlight areas
Domain, each display area correspond to a backlight area, and each display area includes the pixel unit of M rows N row, each backlight area
Interior includes at least one back light unit, and at least one back light unit is corresponding with the pixel unit that M rows N is arranged, and liquid crystal module
Scan mode is from left to right, to be illustrated for the mode progressively scanned from top to bottom：
In order to prevent within the synchronizing cycle of the first field sync signal, at least one back light unit is repeatedly opened, it is of the invention
The backlight driving method that embodiment provides, when determining the pixel unit of M row Nth columns in the corresponding display unit of back light unit
When the charge number of pixel electrode is all higher than or is equal to charge number threshold value, back light unit is opened after the preset time that is delayed；One kind can be real
Existing mode is, when determining in the corresponding display unit of back light unit, the pixel electrode of the pixel unit of the predetermined quantity of the n-th row
Charge number be all higher than or equal to charge number threshold value when, at this time control liquid crystal module driving IC according to the first field sync signal by
When row scanning, only scanning the pixel unit of (vacation lets n equal 18) may be arranged to M rows the 9th, and the row of M rows the 10th are to M rows the
The pixel unit of 18 row does not scan, and in order to reduce power consumption to the greatest extent, the backlight list is opened after the preset time that can be delayed
Member, at this time preset time be equal to M rows the 10th and arrange being all higher than for each pixel unit in the pixel unit that is arranged to M rows the 18th
Or (or driving IC is swept according to the first field sync signal from M rows the 10th Leies equal to the charge number threshold value required time
Retouch the pixel unit the time it takes arranged to M rows the 18th), due to each pixel unit in the pixel unit of the row of M rows N at this time
The charge number of pixel electrode be all higher than or be equal to charge number threshold value, open the corresponding backlight of pixel unit of M rows N row at this time
Unit can reduce the power consumption (journey that the liquid crystal in the pixel unit of M rows N row in each pixel unit deflects at this time to the greatest extent
Degree is maximum), and backlight driving method provided in an embodiment of the present invention can make liquid crystal surface under identical backlight output power
The display brightness of plate is more uniform.
It should be noted that the scheme that above-mentioned steps execute usually is known as tail alignment techniques；Technical staff can basis
Actual demand carries out front and back delay to the opening time of back light unit, to reach best display effect；Charging time, delay
The sum of time and back light unit opening time are equal to the synchronizing cycle of field sync signal, and the wherein charging time refers to the 1st row the 1st row
Pixel electrode and public electrode between be in the charging stage duration, delay time refer to refer to the 1st row the 1st row pixel
Terminate to terminate between the time of charging stage and the pixel electrode and public electrode of the row of M rows the 1st between electrode and public electrode
The sum of difference and preset time of the time of charging stage, back light unit opening time refer to that back light unit is switched by closed state
For open state when time and field sync signal synchronizing cycle end time difference.
The embodiment of the present invention provides a kind of backlight driving method, when the corresponding at least one pixel list of acquisition back light unit
When the field sync signal of member, the charge number of the corresponding pixel electrode of detection pixel unit, and when determining at least one pixel list
When the charge number of the corresponding pixel electrode of member meets predetermined condition, the corresponding back light unit of at least one pixel unit is opened, i.e.,
When the charge number of pixel electrode is unsatisfactory for predetermined condition, the corresponding back light unit of at least one pixel unit will not be opened, from
And the corresponding back light unit of at least one pixel unit of delayed start-up is realized, since the synchronizing cycle of field sync signal is certain,
Therefore the backlight driving method provided according to an embodiment of the invention reduces the corresponding back light unit of at least one pixel unit
Opening time, thereby reduce the power consumption of backlight module, solve in the prior art due in liquid crystal display panel pixel electrode fill
Electricity needs the regular hour, that is, the liquid crystal being located in the pixel electrode of charging stage does not deflect completely, causes back light unit defeated
The backlight gone out can not effectively penetrate liquid crystal, can only the part backlight that the back light unit exports be converted into luminance information, caused
The problem of waste of electric energy.
Embodiment two,
The embodiment of the present invention provides a kind of backlight drive device 10, is applied to display device, and display device includes successively
The backlight module that is stacked, liquid crystal module, backlight module include multiple back light units of array arrangement, and liquid crystal module includes more
A display unit, each display unit include the pixel unit of M row N column arrays arrangement, and display unit corresponds at least one backlight
Unit includes as shown in Figure 10：
Detection unit 101, for when detecting the field sync signal of back light unit, detecting the corresponding display of back light unit
The charge number of the pixel electrode of pixel unit in unit.
Processing unit 102, for when pixel list in the corresponding display unit of back light unit for determining the detection of detection unit 101
When the charge number of pixel electrode of member meets predetermined condition, open back light unit, M is the integer more than or equal to 1, N be more than
Or the integer equal to 1.
Optionally, processing unit 102 are specifically used for when the corresponding display of back light unit for determining that detection unit 101 detects
In unit, when the charge number of the pixel electrode of any one pixel unit is greater than or equal to charge number threshold value, back light unit is opened.
Optionally, processing unit 102 are specifically used for when the corresponding display of back light unit for determining that detection unit 101 detects
In unit, when the charge number of the pixel electrode of the pixel unit of the predetermined quantity of the n-th row is all higher than or is equal to charge number threshold value, open
Open back light unit.
Optionally, processing unit 102 are specifically used for when the corresponding display of back light unit for determining that detection unit 101 detects
In unit, when the charge number of the pixel electrode of the pixel unit of the predetermined quantity of the n-th row is all higher than or is equal to charge number threshold value, prolong
When preset time after open back light unit.
The embodiment of the present invention provides a kind of backlight drive device, when the corresponding at least one pixel list of acquisition back light unit
When the field sync signal of member, the charge number of the corresponding pixel electrode of detection pixel unit, and when determining at least one pixel list
When the charge number of the corresponding pixel electrode of member meets predetermined condition, the corresponding back light unit of at least one pixel unit is opened, i.e.,
When the charge number of pixel electrode is unsatisfactory for predetermined condition, the corresponding back light unit of at least one pixel unit will not be opened, from
And the corresponding back light unit of at least one pixel unit of delayed start-up is realized, since the synchronizing cycle of field sync signal is certain,
Therefore the backlight driving method provided according to an embodiment of the invention reduces the corresponding back light unit of at least one pixel unit
Opening time, thereby reduce the power consumption of backlight module, solve in the prior art due in liquid crystal display panel pixel electrode fill
Electricity needs the regular hour, that is, the liquid crystal being located in the pixel electrode of charging stage does not deflect completely, causes back light unit defeated
The backlight gone out can not effectively penetrate liquid crystal, can only the part backlight that the back light unit exports be converted into luminance information, caused
The problem of waste of electric energy.
Embodiment three,
The embodiment of the present invention provides a kind of display device, includes any one backlight drive device 10 such as embodiment two.
Specific backlight drive device may refer to the associated description in above-mentioned apparatus embodiment two, and details are not described herein again.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of backlight drive device, be applied to display device, the display device include the backlight module being cascading,
Liquid crystal module, the backlight module include multiple back light units of array arrangement, and the liquid crystal module includes multiple display units,
Each display unit includes the pixel unit of M row N column arrays arrangement, and the display unit corresponds at least one backlight list
Member, which is characterized in that including：
Detection unit, it is single for when detecting the field sync signal of back light unit, detecting the corresponding display of the back light unit
The charge number of the pixel electrode of pixel unit in member；
Processing unit, for when pixel unit in the corresponding display unit of the back light unit for determining the detection unit detection
The charge number of pixel electrode when meeting predetermined condition, open the back light unit, M is the integer more than or equal to 1, and N is big
In or equal to 1 integer.
2. backlight drive device according to claim 1, which is characterized in that the processing unit is specifically used for when determination
In the corresponding display unit of the back light unit of the detection unit detection, the charge of the pixel electrode of any one pixel unit
When number is greater than or equal to charge number threshold value, the back light unit is opened.
3. backlight drive device according to claim 1, which is characterized in that the processing unit is specifically used for when determination
In the corresponding display unit of the back light unit of the detection unit detection, the charge of the pixel electrode of the n-th row pixel unit
When number is greater than or equal to charge number threshold value, the back light unit is opened, n is positive integer.
4. backlight drive device according to claim 1, which is characterized in that the processing unit is specifically used for when determination
In the corresponding display unit of the back light unit of the detection unit detection, the charge of the pixel electrode of the n-th row pixel unit
When number is greater than or equal to charge number threshold value, the back light unit is opened after the preset time that is delayed, n is positive integer.
5. a kind of backlight driving method is applied to the backlight drive device as described in claim 1-4, which is characterized in that including：
When detecting the field sync signal of back light unit, pixel unit in the corresponding display unit of the back light unit is detected
The charge number of pixel electrode；
When determining that the charge number of the pixel electrode of pixel unit in the corresponding display unit of the back light unit meets predetermined condition
When, the back light unit is opened, M is the integer more than or equal to 1, and N is the integer more than or equal to 1.
6. according to the method described in claim 5, it is characterized in that, described work as the corresponding display unit of the determining back light unit
When the charge number of the pixel electrode of middle pixel unit meets predetermined condition, opening the back light unit includes：
When determine the charge number of the pixel electrode of any of the corresponding display unit of back light unit pixel unit be more than or
When equal to charge number threshold value, the back light unit is opened.
7. according to the method described in claim 5, it is characterized in that, described work as the corresponding display unit of the determining back light unit
When the charge number of the pixel electrode of middle pixel unit meets predetermined condition, opening the back light unit includes：
When determining in the corresponding display unit of the back light unit, the charge number of the pixel electrode of the n-th row pixel unit be more than or
When equal to charge number threshold value, the back light unit is opened, n is integer.
8. according to the method described in claim 5, it is characterized in that, described work as the corresponding display unit of the determining back light unit
When the charge number of the pixel electrode of middle pixel unit meets predetermined condition, opening the back light unit includes：
When determining in the corresponding display unit of the back light unit, the charge number of the pixel electrode of the n-th row pixel unit be more than or
When equal to charge number threshold value, the back light unit is opened after the preset time that is delayed, n is integer.
9. a kind of display device, which is characterized in that including backlight drive device according to any one of claims 1-4.
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