CN109188778A - Backlight module, display device and its driving method - Google Patents
Backlight module, display device and its driving method Download PDFInfo
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- CN109188778A CN109188778A CN201811291008.2A CN201811291008A CN109188778A CN 109188778 A CN109188778 A CN 109188778A CN 201811291008 A CN201811291008 A CN 201811291008A CN 109188778 A CN109188778 A CN 109188778A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention provides a kind of backlight module, display device and its driving method, it is related to field of display technology, for solving how while improving the smear problem of display device, the problem of the service life of backlight module will not be reduced, or the refreshing frequency of display device will not be reduced.Backlight module, including light guide plate and the first lamp bar and the second lamp bar；First lamp bar extends along direction and is provided with multiple the first lamp sources being intervally arranged, and second lamp bar extends along direction and is provided at least one second lamp source, the first lamp source face in second lamp source and multiple first lamp sources；First lamp source of face is identical with the light emitting angle of second lamp source and orthographic projection on the incidence surface of the light guide plate is overlapped；Wherein, the first lamp source independent control in first lamp bar, the second lamp source independent control in second lamp bar, first lamp source and second lamp source of face open or close simultaneously.
Description
Technical field
The present invention relates to field of display technology more particularly to backlight modules, display device and its driving method.
Background technique
With the development of display technology, liquid crystal display is with its high resolution ratio, extremely wide colour gamut and ultra-thin ruler
The very little hot spot for having become display field development, however, the place that liquid crystal display also has it to need to be improved, for example, due to liquid
Not fast enough the caused dynamic menu smear problem of brilliant response speed.
In order to solve the dynamic menu smear problem of liquid crystal display device, the prior art introduces black insertion technology, such as Fig. 1 institute
Show, in a frame, backlight closed stage, display panel completes picture scanning and liquid crystal overturning；The backlight open stage opens backlight
Mould group to next frame starts.So, it is completed in picture scanning and liquid crystal switching process in display panel, backlight module not work
Make；When backlight module is lighted, display panel does not work.
However, display device in the prior art, due to the application of black insertion technology, the time pole for causing backlight module to be opened
Big shortening, and in order to guarantee that backlight module provides enough brightness, the moment brightness needs of light source mention very high, lead to backlight
Mould group service life reduces；Or backlight module opening time needs to extend, and causes picture refreshing frequency that can not be promoted.No matter which
Kind settling mode, can all bring new technical problem, and therefore, smear problem is still that those skilled in the art need to continue research
Problem.
Summary of the invention
The embodiment of the present invention provides a kind of backlight module, display device and its driving method, how to change for solving
While the smear problem of kind display device, the service life of backlight module will not be reduced, or the brush of display device will not be reduced
The problem of new frequency.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
In a first aspect, provide a kind of backlight module, including light guide plate and the light guide plate is respectively arranged at respect to two
The first lamp bar and the second lamp bar of incident side；First lamp bar extends along direction and is provided with multiple the first lamps being intervally arranged
Source, second lamp bar extend along direction and are provided at least one second lamp source, second lamp source and multiple described first
The first lamp source face in lamp source；First lamp source of face is identical with the light emitting angle of second lamp source,
And the orthographic projection on the incidence surface of the light guide plate is overlapped；Wherein, first lamp source in first lamp bar is independently controlled
It makes, the second lamp source independent control in second lamp bar, first lamp source and second lamp source of face are simultaneously
It opens or closes.
Optionally, multiple first lamp sources in first lamp bar are equidistantly arranged.
Optionally, second lamp bar includes multiple second lamp sources, first lamp source and second lamp source one
One is corresponding.
Optionally, first lamp source and second lamp source are LED.
Second aspect provides a kind of display device, further includes being arranged described including backlight module described in first aspect
Backlight module light emission side display panel；The display panel includes multirow sub-pix, and the first lamp source of face and the second lamp source are used
In providing backlight to the sub-pix of mutually going together；Wherein, sub-pix described in a line is connect with same root grid line.
The third aspect, provides a kind of driving method of display device, and display device includes display panel and backlight module, institute
Stating display panel includes M row sub-pix, and the first lamp bar that the backlight module includes is provided with N number of the first lamp being intervally arranged
Source, M and N are positive integer；The driving method of the display device include: sub-pix described in M row to the display panel line by line
Input the data of image to be displayed；It is provided described in the input of sub-pix described in the multirow of backlight to as same first lamp source
After the data of image to be displayed, first lamp source unlatching is controlled；The multirow of backlight is being provided to by same first lamp source
Before the sub-pix inputs the data of the image to be displayed, first lamp source closing is controlled.
Optionally, first lamp bar includes N number of first lamp source of spaced set；To by same described
After sub-pix described in the multirow of one lamp source offer backlight inputs the data of the image to be displayed, first lamp source unlatching is controlled,
Include: to start to after the data of the input image to be displayed of sub-pix described in (M/N) * X+1 row, controls the X of the lamp bar
First lamp source is opened, and X first lamp source is used for sub-pix described in (M/N) * (X-1)+1~(M/N) * X row
Backlight is provided；Wherein, M is the multiple of N, and X is the positive integer less than N.
Optionally, described to be shown to the input of sub-pix described in the multirow of backlight is provided as same first lamp source
Before the data of image, first lamp source closing is controlled, comprising: before first lamp source is opened under control, control is current
First lamp source opened is closed, so that providing sub-pix described in the multirow of backlight to as same first lamp source
Before inputting the data of the image to be displayed, which has been in close state.
Optionally, described to be shown to the input of sub-pix described in the multirow of backlight is provided as same first lamp source
Before the data of image, first lamp source closing is controlled, comprising: providing the multirow institute of backlight to by same first lamp source
It states after sub-pix inputs the data of the image to be displayed, controls first lamp source unlatching, and keep it turning on first lamp source
State, until before inputting the data of the image to be displayed to sub-pix described in the multirow for providing backlight as the light source again, control
Make first lamp source closing.
Optionally, the backlight module further includes the second lamp bar being oppositely arranged with first lamp bar, second lamp
At least one second lamp source, first lamp source in second lamp source and multiple first lamp sources are provided on item
Face, first lamp source of face are used to provide backlight to the sub-pix of mutually going together with second lamp source；The display
The driving method of device further include: first lamp source and second lamp source of face open or close simultaneously.
The present invention provides a kind of backlight module, display device and its driving method, when backlight module is applied to display dress
When setting, during introducing the driving after black insertion technology, when controlling backlight module unlatching, the first lamp source and the second lamp of face
Source is opened simultaneously, and double lamp bars shine to shine available higher brightness relative to single lamp bar.So, improving display dress
While the smear problem set, the instantaneous starting electric current of lamp source can be reduced, the service life of lamp source is effectively increased, thus extended back
The service life of optical mode group.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of driver' s timing schematic diagram for display device that the prior art provides；
Fig. 2 is a kind of structural schematic diagram of backlight module provided in an embodiment of the present invention；
Fig. 3 is a kind of flow diagram of the driving method of display device provided in an embodiment of the present invention；
Fig. 4 is a kind of timing diagram of the driving method of display device provided in an embodiment of the present invention；
Fig. 5 is the timing diagram of the driving method of another display device provided in an embodiment of the present invention.
Appended drawing reference:
10- light guide plate；The first lamp bar of 20-；The first lamp source of 21-；The second lamp bar of 30-；The second lamp source of 31-.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described 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.
Display device is particularly applied to the display dress of VR (Virtual Reality, virtual reality technology) display field
It sets, during the driving of display device, it will usually black insertion technology is introduced, for reducing motion blur phenomenon.With refreshing frequency
It increases and pixel is promoted (increase resolution, sweep time are promoted), the backlight bright time is shorter and shorter, required instantaneous
Brightness is also higher and higher, has increasingly higher demands to the performance of backlight.
The embodiment of the present invention provides a kind of backlight module, as shown in Fig. 2, including light guide plate 10 and being respectively arranged at leaded light
First lamp bar 20 and second lamp bar 30 of the plate 10 with respect to two incident sides；First lamp bar 20 extends along direction and is provided with multiple
Every the first lamp source 21 of arrangement, the second lamp bar 30 extends along direction and is provided at least one second lamp source 31, the second lamp source 31
With 21 face of the first lamp source in multiple first lamp sources 21；First lamp source 21 of face and the light emitting angle of the second lamp source 31
Identical and on the incidence surface of light guide plate 10 orthographic projection is overlapped；Wherein, the independent control of the first lamp source 21 in the first lamp bar 20
It makes, 31 independent control of the second lamp source in the second lamp bar 30, the first lamp source 21 of face and the second lamp source 31 are opened or closed simultaneously
It closes.
It should be noted that first, backlight module provided by the invention includes the first lamp bar 20 and the second lamp bar 30, because
This, for light guide plate 10,20 place side of the first lamp bar and 30 place side of the second lamp bar are the incident side of light guide plate 10, this
The light guide plate 10 at place is, for example, rectangle.
The second, the first lamp bar 20 and the second lamp bar 30 are arranged in 10 opposite sides of light guide plate, to the incidence surface of light guide plate 10
Shine, therefore, as shown in Fig. 2, the first lamp bar 20 and the second lamp bar 30 prolong to stretch direction identical, be provided in the second lamp bar 30 more
When a second lamp source 31, the arragement direction of the second lamp source 31 is identical as the arragement direction of the first lamp source 21.
Wherein, the second lamp source 31 and 21 face of the first lamp source in multiple first lamp sources 21, that is to say, that the second lamp
The number in source 31 is less than or equal to the number of the first lamp source 21, and first lamp source 21 and the second lamp are always had in the first lamp bar 20
31 face of source.
Third, the first lamp source 21 of face identical and in light guide plate 10 incidence surface with the light emitting angle of the second lamp source 31
On orthographic projection be overlapped, refer to, when backlight module is used for display device, the first lamp source 21 of face and the second lamp source 31
Light emitting region is identical, for providing backlight to mutually colleague's sub-pix.
4th, the first lamp source 21 and the second lamp source 31 of face open or close simultaneously, but 21 He of the first lamp source of face
Second lamp source 31 can be with co- controlling, can also be with independent control.
5th, backlight module provided by the invention can be applied to the display device using black insertion technology, in backlight module
During driving, the first lamp source 21 and the second lamp source 31 of face open or close simultaneously, and the driver' s timing of backlight module can be with
It is same as the prior art.
Backlight module provided in an embodiment of the present invention is introducing black plug skill when backlight module is applied to display device
During postoperative driving, when controlling backlight module unlatching, the first lamp source 21 and the second lamp source 31 of face are opened simultaneously, double
Lamp bar shines to shine available higher brightness relative to single lamp bar.So, in the smear problem for improving display device
While, the instantaneous starting electric current of lamp source can be reduced, the service life of lamp source is effectively increased, to extend the use of backlight module
Service life.
In addition, structure of the backlight module using double lamp bars, since there are lamp bar in the two sides of light guide plate, it can be very big
The homogeneity of the raising display picture of degree.
In order to simplify the layout of backlight module, in some embodiments, multiple first lamp sources 21 in the first lamp bar 20 etc.
Spacing arrangement.
Wherein, multiple second lamp sources 31 when in the second lamp bar 30 including multiple second lamp sources 31, in the second lamp bar 30
Also equidistant arrangement, and the spacing between the spacing between the second lamp source 31 and the first lamp source 21 is equal.
In order to further ensure that the light emission luminance of each first lamp source, 21 position, in some embodiments, such as Fig. 2
Shown, the second lamp bar 30 includes multiple second lamp sources 31, and the first lamp source 21 and the second lamp source 31 correspond.
Wherein, one-to-one two the first lamp sources 21 and 31 face of the second lamp source, light emitting angle are identical.
In order to save cost, in some embodiments, the first lamp source 21 and the second lamp source 31 are LED (Light
Emitting Diode, light emitting diode).
The embodiment of the present invention also provides a kind of display device, including above-mentioned backlight module, further includes being arranged in backlight module
The display panel of light emission side, display panel include multirow sub-pix, and the first lamp source 21 and the second lamp source 31 of face are used for phase
Sub-pix of going together provides backlight；Wherein, a line sub-pix is connect with same root grid line.
It should be noted that first, the extending direction and data line of the first lamp bar 20 and the second lamp bar 30 in backlight module
Extending direction it is identical, when the first lamp source 21 in the first lamp bar 20 is opened one by one, direction that the first lamp source 21 is opened one by one
It is identical as the scanning direction of grid line in display panel.
Wherein, the first lamp source 21 of one group of face provides backlight to sub-pix of mutually going together with the second lamp source 31, and difference group is just
Pair the first lamp source 21 and the second lamp source 31 to do not go together sub-pix provide backlight.
The first lamp source of difference 21 in the second, the first lamp bar 20 can open simultaneously, can also open one by one, and specifically adopt
The driving method of black insertion technology is related.
Third, the first lamp source 21, which for example can be set, is used to provide the middle position of the multirow sub-pix of backlight at it.
Display device provided in an embodiment of the present invention, including any of the above-described kind of backlight module, its advantages and above-mentioned back
The beneficial effect of optical mode group is identical, and details are not described herein again.
The embodiment of the present invention also provides a kind of driving method of display device, and display device includes display panel and backlight mould
Group, display panel include M row sub-pix, and the first lamp bar that backlight module includes is provided with N number of the first lamp source being intervally arranged, M
It is positive integer with N；Wherein, the arragement direction of the first lamp bar and the line direction of sub-pix are vertical.
As shown in figure 3, the driving method of display device includes:
S10, the data for inputting image to be displayed line by line to the M row sub-pix of display panel.
Wherein, this process is to drive the process of display panel, inputs open signal line by line to grid line, is inputted to data line
Corresponding data-signal, so that the liquid crystal in M row sub-pix is overturn line by line.
S20, to by same first lamp source provide backlight multirow sub-pix input image to be displayed data after, control
Make first lamp source unlatching.
Illustratively, 10 row sub-pixes provide backlight to first the first lamp source forward, input in 10 row sub-pixes forward
After the data of image to be displayed, at a certain moment for starting the data to the 11st row sub-pix input image to be displayed, control the
One the first lamp source is opened.
For example, if first the first lamp source forward 10 row sub-pixes provide backlight, this design method is by first
The halation range of first lamp source is taken into account, though the halation range of first the first lamp source is not taken into account, neglect
The slightly influence of the halation of first the first lamp source then can be after the data to the 10th row sub-pix input image to be displayed,
First the first lamp source is controlled at once to open.If not taking into account the halation range of first the first lamp source, but consider first
The influence of the halation of a first lamp source is also possible to after the data to the 10th row sub-pix input image to be displayed, Zai Guoshe
It fixes time, just controls first the first lamp source and open, can ensure the reliability used.
S30, to by same first lamp source provide backlight multirow sub-pix input image to be displayed data before, control
Make first lamp source closing.
Illustratively, the first lamp source of third provides backlight to 31-40 row sub-pix, inputs to the 40th row sub-pix
At a certain moment after the data of image to be displayed, control third the first lamp source is opened, into after next frame, to the 31st row Asia picture
The a certain moment before the data of element input image to be displayed need to control the first lamp source of third and close.
For example, it may be always maintained at unlatchings after present frame opens third the first lamp source, up to next frame is to the 31st
Row sub-pix, which inputs before the data of image to be displayed, closes third the first lamp source and (such as inputs to the 30th row sub-pix to be shown
The first lamp source of third is immediately closed off after the data of image).It is also possible to present frame to open the first lamp source of third, unlatching is set
The first lamp source of third, before next frame inputs the data of image to be displayed to the 31st row sub-pix, third are shut off after fixing time
A first lamp source has been in close state.
It should be noted that first, the driving method of display device provided by the invention can be applied suitable for existing
The display device of black insertion technology, the opening and closing time of each component is unlike the prior art.
Second, above-mentioned steps S10-S30 are not limited to successively execute, and sub-pix inputs the feelings of the data of image to be displayed
Condition is matched with the switch state of the first lamp source.
The driving method of display device provided in an embodiment of the present invention, by providing backlight to by same first lamp source
Multirow sub-pix input image to be displayed data after, control first lamp source unlatching, the subsequent M row Asia picture to display panel
While element inputs the data of image to be displayed line by line, the first lamp source is also opened one by one.So, without reserved back in a frame
The time that optical module is opened is solving to trail as long as reserving the time of the data of every row sub-pix input image to be displayed
On the basis of problem, the refreshing frequency of display panel can be significantly promoted, to realize the effect of quick response.
It illustratively, as shown in Figure 4 and Figure 5, include 80 row sub-pixes (L1-L80) with display panel, the first lamp bar includes
8 the first lamp sources (D1-D8), each first lamp source for providing backlight for 10 row sub-pixes for being illustrated.Wherein, Fig. 4
It indicates to open input signal with the high level in Fig. 5, low level indicates cut-off not input signal, and L1-10 high level indicates 1-
10 row sub-pixes input the data of image to be displayed line by line.
As shown in Figure 4 and Figure 5, the data of image to be displayed are inputted line by line to the row of L1~10 sub-pix, L10 row sub-pix is defeated
After the data for entering image to be displayed, controls first the first lamp source D1 and open.
Input the data of image to be displayed line by line to the row of L11~20 sub-pix, L20 row sub-pix inputs image to be displayed
After data, controls second the first lamp source D2 and open.
And so on, input the data of image to be displayed line by line to the row of L71~80 sub-pix, the input of L80 row sub-pix to
After the data for showing image, controls the 8th the first lamp source D8 and open.
It repeats the above process, but before inputting the data of image to be displayed line by line to the row of L1~10 sub-pix, control first
A first lamp source D1 is closed.
Before inputting the data of image to be displayed line by line to the row of L11~20 sub-pix, controls second the first lamp source D2 and close
It closes.
And so on, before inputting the data of image to be displayed line by line to the row of L71~80 sub-pix, control the 8th first
Lamp source D8 is closed.
During above-mentioned driving as can be seen that when first the first lamp source D1 is opened, display device is to display panel
The row of L11~20 sub-pix input the data of image to be displayed line by line.When second the first lamp source D2 is opened, display device exists
Input the data of image to be displayed line by line to the row of L21~30 sub-pix of display panel.The row of sub-pix input data and
One lamp source is staggered, and the refreshing frequency of the first lamp source and the refreshing frequency of display panel are identical, and two signals can synchronize defeated
Enter, do not interfere with each other, being only that the first lamp bar is more late than display panel starts one and input figure to be shown line by line to the row of L1~10 sub-pix
The time (1/8 frame) of the data of picture.Also, the driving of the first lamp source is not take up the time in a frame.
In order to simplify driving process, in some embodiments, the first lamp bar includes N number of first lamp source of spaced set.
Step S20 includes:
Start the first lamp of X that lamp bar is controlled after the data that (M/N) * X+1 row sub-pix inputs image to be displayed
Source is opened, and the first lamp source of X is used to provide backlight to (M/N) * (X-1)+1~(M/N) * X row sub-pix；Wherein, M N
Multiple, X is positive integer less than N.
Wherein it is possible to be the control X the when to the data of (M/N) * X+1 row sub-pix input image to be displayed
One lamp source is opened；It is also possible to after the data that (M/N) * X+1 row sub-pix inputs image to be displayed, when using setting
Between, control the first lamp source of X is opened.
Illustratively, as shown in Figure 4 and Figure 5, after the data to the 11st row sub-pix input image to be displayed, lamp is controlled
Article the 1st the first lamp source open.
For the ease of control, and tailing problem is preferably solved, in some embodiments, as shown in figure 4, step S30
Include:
Before first lamp source is opened under control, controls the first lamp source currently opened and close, so that in Xiang Youtong
Before one the first lamp source provides the data of multirow sub-pix input image to be displayed of backlight, which has been in closing
State.
That is, next first lamp source is opened, upper first lamp source is closed, the first lamp source in the first lamp bar according to
Secondary, single unlatching.
In order to reduce the transient current of each first lamp source, extend the opening time of each first lamp source, in some implementations
In example, as shown in figure 5, step S30 includes:
To after providing the data of multirow sub-pix input image to be displayed of backlight by same first lamp source, control should
First lamp source is opened, and keeps it turned on first lamp source, until providing the multirow Asia picture of backlight to by the light source again
Before the data of element input image to be displayed, first lamp source closing is controlled.
That is, being kept it turned on after first lamp source is opened, until next frame is needed to by first lamp source
At a certain moment before the data of the multirow sub-pix input image to be displayed of backlight are provided, first lamp source closing is controlled, it is same
It is in the open state that moment has multiple first lamp sources.
In order to improve the brightness of backlight, in some embodiments, backlight in the case where not improving the transient current of lamp source
Mould group further includes the second lamp bar being oppositely arranged with the first lamp bar, is provided at least one second lamp source in the second lamp bar, and second
A first lamp source face in lamp source and multiple first lamp sources, the first lamp source of face and second lamp source are used for identical
Row sub-pix provides backlight.
The driving method of display device further include:
The first lamp source and the second lamp source of face open or close simultaneously.
That is, the opening and closing of the second lamp source and, first lamp in face state identical as the first lamp source of its face
Source and the second lamp source are opened simultaneously to be simultaneously closed off.
The driving method of display device provided in an embodiment of the present invention, due to without reserving backlight module driving in a frame
Period, can significantly improve the refreshing frequency of display device.Illustratively, when the frequency upgrading of display device to 90Hz very
When to 120Hz or more, corresponding frame picture is nearly all the number to each row sub-pix of display panel input image to be displayed
According to time, backlight can satisfy above-mentioned brush almost without response time, driving method provided in an embodiment of the present invention completely
New frequency.
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 (10)
1. a kind of backlight module, which is characterized in that including light guide plate and be respectively arranged at the light guide plate opposite two and enter light
The first lamp bar and the second lamp bar of side；
First lamp bar extends along direction and is provided with multiple the first lamp sources being intervally arranged, and second lamp bar extends along
Direction is provided at least one second lamp source, first lamp source in second lamp source and multiple first lamp sources
Face；First lamp source of face is identical with the light emitting angle of second lamp source and on the incidence surface of the light guide plate
Orthographic projection be overlapped；
Wherein, the first lamp source independent control in first lamp bar, second lamp source in second lamp bar are only
Vertical control, first lamp source and second lamp source of face open or close simultaneously.
2. backlight module according to claim 1, which is characterized in that multiple first lamp sources in first lamp bar
Equidistant arrangement.
3. backlight module according to claim 1, which is characterized in that second lamp bar includes multiple second lamps
Source, first lamp source and second lamp source correspond.
4. backlight module according to claim 1-3, which is characterized in that first lamp source and second lamp
Source is LED.
5. a kind of display device, which is characterized in that further include setting including the described in any item backlight modules of claim 1-4
In the backlight module light emission side display panel；
The display panel includes multirow sub-pix, and the first lamp source of face is used for the second lamp source to the sub-pix of mutually going together
Backlight is provided；
Wherein, sub-pix described in a line is connect with same root grid line.
6. a kind of driving method of display device, which is characterized in that display device includes display panel and backlight module, described aobvious
Show that panel includes M row sub-pix, the first lamp bar that the backlight module includes is provided with N number of the first lamp source being intervally arranged, M and
N is positive integer；The driving method of the display device includes:
Sub-pix described in M row to the display panel inputs the data of image to be displayed line by line；
The data that sub-pix described in the multirow of backlight inputs the image to be displayed are being provided to as same first lamp source
Afterwards, first lamp source unlatching is controlled；
The data that sub-pix described in the multirow of backlight inputs the image to be displayed are being provided to as same first lamp source
Before, control first lamp source closing.
7. the driving method of display device according to claim 6, which is characterized in that first lamp bar includes equidistant
N number of first lamp source being arranged；
The data that sub-pix described in the multirow of backlight inputs the image to be displayed are being provided to as same first lamp source
Afterwards, first lamp source unlatching is controlled, comprising:
Start to control the X institute of the lamp bar after the data that sub-pix described in (M/N) * X+1 row inputs image to be displayed
The unlatching of the first lamp source is stated, X first lamp source to sub-pix described in (M/N) * (X-1)+1~(M/N) * X row for mentioning
For backlight；
Wherein, M is the multiple of N, and X is the positive integer less than N.
8. the driving method of display device according to claim 6, which is characterized in that by same first lamp
Before sub-pix described in the multirow of source offer backlight inputs the data of the image to be displayed, first lamp source closing is controlled, comprising:
Before first lamp source is opened under control, control first lamp source currently opened and close so as to
Before the sub-pix as described in the multirow of the same first lamp source offer backlight inputs the data of the image to be displayed, this first
Lamp source has been in close state.
9. the driving method of display device according to claim 6, which is characterized in that by same first lamp
Before sub-pix described in the multirow of source offer backlight inputs the data of the image to be displayed, first lamp source closing is controlled, comprising:
The data that sub-pix described in the multirow of backlight inputs the image to be displayed are being provided to as same first lamp source
Afterwards, first lamp source unlatching is controlled, and keeps it turned on first lamp source, until providing backlight to by the light source again
Before sub-pix described in multirow inputs the data of the image to be displayed, first lamp source closing is controlled.
10. according to the driving method of the described in any item display devices of claim 6-9, which is characterized in that the backlight module
Further include the second lamp bar being oppositely arranged with first lamp bar, at least one second lamp source be provided in second lamp bar,
The first lamp source face in second lamp source and multiple first lamp sources, first lamp source of face and institute
The second lamp source is stated for providing backlight to the sub-pix of mutually going together；
The driving method of the display device further include:
First lamp source and second lamp source of face open or close simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811291008.2A CN109188778A (en) | 2018-10-31 | 2018-10-31 | Backlight module, display device and its driving method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811291008.2A CN109188778A (en) | 2018-10-31 | 2018-10-31 | Backlight module, display device and its driving method |
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