CN104299602B - A kind of backlight compensation method - Google Patents
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- CN104299602B CN104299602B CN201410433331.4A CN201410433331A CN104299602B CN 104299602 B CN104299602 B CN 104299602B CN 201410433331 A CN201410433331 A CN 201410433331A CN 104299602 B CN104299602 B CN 104299602B
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- 238000001514 detection method Methods 0.000 claims abstract description 18
- 230000035515 penetration Effects 0.000 claims abstract description 5
- 238000004020 luminiscence type Methods 0.000 claims description 43
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Abstract
The present invention relates to a kind of backlight compensation method, described backlight compensation method is for compensating the change in each frame time of the light transmitance in the liquid crystal layer of display floater, it comprises the steps: S1, the light of multiple predeterminable areas of the detection backlight directive display floater transmitance in liquid crystal layer standards change in a frame time；S2, according to described light penetration standards change in a frame time, when the brightness of the multiple predeterminable areas calculating display floater of sening as an envoy to keeps constant in this frame time, the brightness flop presented needed for the light of each predeterminable area of backlight directive；And arrange backlight in each frame time to multiple predeterminable areas of display floater launch present corresponding bright change light.The brightness that above-mentioned backlight compensation method can make display floater shown in a frame time keeps constant, thus avoids scintillation.
Description
Technical field
The present invention relates to technical field of liquid crystal display, in particular it relates to a kind of backlight compensation method.
Background technology
At Thin Film Transistor-LCD (Thin Film Transistor Liquid Crystal
Display, hereinafter referred to as TFT LCD) in, flicker (Flicker) phenomenon is a kind of ratio
More typically bad.The principal element causing scintillation includes the common electrical on public electrode wire
Resistance on pressure signal bias, public electrode is uneven, the leakage current of thin film transistor (TFT) (TFT)
Bigger etc..
Wherein, the reason of the scintillation that the leakage current of TFT causes more greatly is: work as TFT
When leakage current is bigger, the voltage retention of storage electric capacity can be not enough, say, that to storage
Electric capacity carries out in the time interval of twice charging, and the voltage on pixel electrode can be reduced to preset model
Outside enclosing, so that the voltage difference between pixel electrode and public electrode has reduction by a relatively large margin
Or increase, and then cause the deflection of liquid crystal molecule, and cause the brightness of this pixel to brighten or dimmed,
The most so-called " flicker " phenomenon.
In actual applications, array (Array) technique of TFT can be prepared by improvement,
Reduce the leakage current of TFT, reach to improve the purpose of scintillation, but this method can extend
The cycle of technique, and there is bigger technology difficulty, the raising of preparation cost can be caused.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art, it is proposed that one
Planting backlight compensation method, described backlight compensation method can regulate backlight in every frame time and penetrate
To the brightness of the light of the predeterminable area of display floater, to light in the liquid crystal layer of display floater
The change of transmitance compensate, make display floater display brightness in a frame time keep
Constant.
A kind of backlight compensation method is provided, for light is being shown for realizing the purpose of the present invention
Show that the change in each frame time of the transmitance in the liquid crystal layer of panel compensates, make display
Panel display brightness in a frame time keeps constant, comprises the steps: S1, detection
The light of multiple predeterminable areas of backlight directive display floater transmitance in liquid crystal layer exists
Standards change in one frame time；S2, according to described light penetration in a frame time
Standards change, calculates the display brightness of multiple predeterminable areas of display floater of sening as an envoy at a frame time
When interior holding is constant, the brightness presented needed for the light of each predeterminable area of backlight directive becomes
Change；And arrange backlight in multiple predeterminable areas from each frame time to display floater launch in
The light of existing corresponding bright change.
Wherein, light the passing through in liquid crystal layer of the described each predeterminable area of backlight directive
Rate standards change in a frame time is the light of the presetted pixel in this predeterminable area of directive
The change in a frame time of the transmitance in liquid crystal layer.
Wherein, described presetted pixel is positioned at the center of described predeterminable area.
Wherein, light the passing through in liquid crystal layer of the described each predeterminable area of backlight directive
Rate standards change in a frame time is all pixels in this predeterminable area of directive or wherein
The meansigma methods of the light of the partial pixel transmitance in liquid crystal layer change in a frame time.
Wherein, the light of described pixel of directive predeterminable area is detected according to following method at liquid
The transmitance in crystal layer change in a frame time: S10, detection predeterminable area in described
The thin film transistor (TFT) of pixel leakage current in a frame time；S11, according to described leakage current,
Calculate the change in a frame time of the voltage on the pixel electrode of described pixel；S12, root
According to the voltage difference between pixel electrode and public electrode and light the transmitance in liquid crystal layer it
Between corresponding relation, and the change that the voltage on described pixel electrode is in a frame time, obtain
Obtain the light of the pixel transmitance in liquid crystal layer change in a frame time described in directive.
Wherein, the light of described pixel of directive predeterminable area is detected according to following method at liquid
The transmitance in crystal layer change in a frame time: S10, to the predeterminable area of display floater
The backlight of brightness constancy is provided；S11, the display brightness of the described pixel in detection predeterminable area
Change in a frame time；S12, exists according to the display brightness of the described pixel of predeterminable area
Change in one frame time, calculates the light of described pixel of directive predeterminable area at liquid crystal layer
In transmitance change in a frame time.
Wherein, described backlight includes multiple luminescence unit, and the quantity of luminescence unit is with default
The quantity in region is equal, and the two one_to_one corresponding；Each luminescence unit includes that at least one is luminous
Device, described luminescent device is for launching light to the predeterminable area corresponding with described luminescence unit
Line, and described luminescent device can regulate the predeterminable area that its directive is corresponding with described luminescence unit
The brightness of light.
Wherein, described luminescent device is light emitting diode or Organic Light Emitting Diode.
Wherein, each described luminescence unit includes a luminescent device.
Wherein, described backlight is direct-light-type backlight；Corresponding with described luminescence unit is pre-
If region is the region that a pixel is corresponding, or, it is the region including multiple pixel.
Wherein, described light source is side backlight source；Each predeterminable area includes one-row pixels
Or adjacent multirow pixel.
The method have the advantages that
The backlight compensation method that the present invention provides, in every frame time, controls backlight to aobvious
Show that multiple predeterminable areas of panel launch the light presenting corresponding bright change, described light bright
The change of described light transmitance in liquid crystal layer is compensated by degree change, makes the plurality of
Predeterminable area display brightness in a frame time keeps constant, such that it is able to avoid display floater
" flicker " phenomenon occurs.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the one of description
Part, is used for explaining the present invention together with detailed description below, but is not intended that this
The restriction of invention.In the accompanying drawings:
The flow chart of the backlight compensation method that Fig. 1 provides for the embodiment of the present invention one.
Fig. 2 is the schematic diagram of voltage-transmittance curve；
Fig. 3 is backlight backlight and schematic diagram of display floater when being side backlight source；
Fig. 4 is that the change in the many frame times of continuous print of the display brightness of multiple predeterminable area is shown
It is intended to.
Description of reference numerals
10: display floater；11: predeterminable area；12: backlight；13: luminescence unit；
14: luminescent device.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.Should manage
Solving, detailed description of the invention described herein is merely to illustrate and explains the present invention, not
For limiting the present invention.
Embodiment one:
The flow chart of the backlight compensation method that Fig. 1 provides for the embodiment of the present invention one.Such as Fig. 1
Shown in, backlight compensation method for light transmitance in the liquid crystal layer of display floater often
Change in one frame time compensates, and makes display floater display brightness in a frame time protect
Holding constant, it comprises the steps:
S1, the light of multiple predeterminable areas of detection backlight directive display floater is at liquid crystal layer
In transmitance standards change in a frame time；
S2, according to described light penetration standards change in a frame time, calculating is sent as an envoy to
When the display brightness of multiple predeterminable areas of display floater keeps constant in a frame time, backlight
The brightness flop presented needed for the light of each predeterminable area of source directive；And backlight is set often
Launch the light presenting corresponding bright change to multiple predeterminable areas of display floater in one frame time
Line.
According to the content described in background technology, for any one display floater,
On this display floater of directive, the light of any region transmitance in liquid crystal layer can be when a frame
Between (so-called " frame time " refers to that this predeterminable area is carried out between twice sweep by gate line
Time interval) in change.
In the present embodiment, so-called " standards change " for representing one predeterminable area of directive
The parameter of all light transmitance in liquid crystal layer change in a frame time；And step
In S2, calculate multiple predeterminable areas of display floater of sening as an envoy to according to above-mentioned " standards change "
When display brightness keeps constant in a frame time, the light of each predeterminable area of backlight directive
Needed for the brightness flop that presents；Further, backlight in each frame time according to corresponding brightness
Change and launch light to multiple predeterminable areas.Thus, in every frame time, backlight directive
The brightness of the light of one predeterminable area according to the light of all these predeterminable areas of directive at liquid crystal layer
In the change of transmitance and change；Further, when the transmitance of light increases, backlight is sent out
The luminance-reduction of the light penetrated；When the transmitance of light reduces, the light that backlight is launched
Brightness increases, and the brightness making this predeterminable area shown in a frame time keeps constant, keeps away
Exempt from that " flicker " phenomenon occurs.
In the present embodiment, the light of the described each predeterminable area of backlight directive is at liquid crystal layer
In the transmitance " standards change " in a frame time be all in this predeterminable area of directive
The change in a frame time of the light of pixel or the wherein partial pixel transmitance in liquid crystal layer
The meansigma methods changed；That is, with all pixels in this predeterminable area of directive or wherein partial pixel
The meansigma methods of the light transmitance in liquid crystal layer change in a frame time represents all penetrating
To the change in a frame time of the light of this predeterminable area transmitance in liquid crystal layer.
Specifically, according to the light of the described pixel in following method detection directive predeterminable area
The change in a frame time of the transmitance in liquid crystal layer:
S10, the thin film transistor (TFT) of the described pixel in detection predeterminable area is in a frame time
Leakage current；
S11, according to described leakage current, the voltage calculated on the pixel electrode of described pixel exists
Change in one frame time；
S12, according to the voltage difference between pixel electrode and public electrode and light in liquid crystal layer
Transmitance between corresponding relation, and the voltage on described pixel electrode is in a frame time
Change, it is thus achieved that the light of pixel described in directive transmitance in liquid crystal layer is in a frame time
Change.
All pixels in directive predeterminable area or wherein partial pixel are obtained according to said method
The change in a frame time of the light transmitance in liquid crystal layer, and then calculate the plurality of change
The meansigma methods changed, is described " standards change ".
In step S11 of said method, calculate described pixel according to following formula (1)
Voltage on pixel electrode, and obtain the change in a frame time of the voltage on pixel electrode,
Wherein C is the size storing electric capacity of pixel, and i is the electric leakage of the thin film transistor (TFT) of pixel
Stream, V is the voltage on pixel electrode.
In step s 12, voltage difference between pixel electrode and public electrode and light are at liquid
The relation between transmitance in crystal layer according to test determination, this relation normally behave as voltage-
Transmittance curve, i.e. V-T curve.Fig. 2 is the schematic diagram of voltage-transmittance curve, wherein,
Transverse axis represents the voltage difference between pixel electrode and public electrode, and the longitudinal axis represents that light is at liquid crystal layer
In transmitance.
Specifically, in the present embodiment, as it is shown on figure 3, backlight 12 includes multiple luminescence
The quantity of the predeterminable area 11 on unit 13, the quantity of luminescence unit 13 and display floater 10
Equal, and the two one_to_one corresponding；Each luminescence unit 13 includes at least one luminescent device 14,
Described luminescent device 14 is for launching to the predeterminable area 11 corresponding with described luminescence unit 13
Light, and described luminescent device 14 can to regulate its directive corresponding with described luminescence unit 13
The brightness of the light of predeterminable area 11.Thus in a frame time, according to each luminescence unit
The change of the light that the luminescent device 14 in 13 sends transmitance in liquid crystal layer, this luminescence
Luminescent device 14 in unit 13 can regulate the brightness of the light of its injection, makes and this luminescence
The brightness shown by a frame time of the predeterminable area 11 of unit 13 correspondence keeps constant.Excellent
Selection of land, described luminescent device 14 is light emitting diode (LED) or Organic Light Emitting Diode
(OLED)。
Preferably, each luminescence unit 13 includes a luminescent device, so makes and each
The predeterminable area 11 of light unit 13 correspondence only relies upon a luminescent device 14 and transmits to light
Line, thus when the brightness of the light to directive predeterminable area 11 is adjusted, only need regulation
The brightness of the light that one luminescent device 14 is sent, it is clear that such regulative mode
Easier.
In figure 3, backlight 12 is side backlight source, in the case, each default
Region 11 includes one-row pixels or adjacent multirow pixel.In actual applications, backlight 12
Can also be direct-light-type backlight, in this case, each luminescence unit 13 correspondence pre-
If region 11 includes the region of multiple pixel；Further, corresponding with each luminescence unit 13
Predeterminable area 11 be region corresponding to a pixel.
It should be noted that in the present embodiment, the described each predeterminable area of backlight directive
The light transmitance in liquid crystal layer standards change in a frame time be directive this preset
The light of all pixels in region or wherein partial pixel transmitance in liquid crystal layer is one
The meansigma methods of the change in frame time, but the present invention is not limited to this, in actual applications, institute
State the light of each predeterminable area of the backlight directive transmitance in liquid crystal layer at a frame time
Interior standards change can also be that the light of the presetted pixel in this predeterminable area of directive is at liquid crystal
The change in a frame time of the transmitance in Ceng, so can be easier to and obtain institute easily
State " standards change ".Preferably, described presetted pixel is positioned at the centre bit of described predeterminable area
Put.
Embodiment two:
The present embodiment provides a kind of backlight compensation method equally, and compared with embodiment one, it is same
Sample comprises the steps:
S1, the light of multiple predeterminable areas of detection backlight directive display floater is at liquid crystal layer
In transmitance standards change in a frame time；
S2, according to described light penetration standards change in a frame time, calculating is sent as an envoy to
When the display brightness of multiple predeterminable areas of display floater keeps constant in a frame time, backlight
The brightness flop presented needed for the light of each predeterminable area of source directive；And backlight is set often
Launch the light presenting corresponding bright change to multiple predeterminable areas of display floater in one frame time
Line.The backlight compensation method provided due to the present embodiment and other something in common of embodiment one are
In embodiment one, there is detailed description, do not repeated them here.
Below with regard to the present embodiment provide backlight compensation method different from above-described embodiment one it
Place is described in detail.
In step S1 of the present embodiment, according to the institute of following method detection directive predeterminable area
State the change in a frame time of the light of the pixel transmitance in liquid crystal layer:
S10, provides the backlight of brightness constancy to the predeterminable area of display floater；
S11, the change in a frame time of the display brightness of the described pixel in detection predeterminable area
Change；
S12, according to the change in a frame time of the display brightness of the described pixel of predeterminable area
Change, calculate the light of described pixel of the directive predeterminable area transmitance in liquid crystal layer one
Change in frame time.
Light according to the presetted pixel in said method detection directive predeterminable area is at liquid crystal layer
In transmitance change in a frame time；Or, owning in detection directive predeterminable area
The change in a frame time of the light of pixel or the wherein partial pixel transmitance in liquid crystal layer
Change, and calculate its meansigma methods；Thus obtain described " standards change ".As shown in Figure 4, its
In every line represent the change in the many frame times of continuous print of the display brightness of a predeterminable area.
Specifically, in step S11, detect institute by optical detecting instruments such as brightness detection instruments
State the standards change of the display brightness of predeterminable area.And in step s 12, due to backlight
Brightness constancy, therefore, the display brightness of the described pixel in predeterminable area is in a frame time
Change is the light of pixel described in directive transmitance in liquid crystal layer in a frame time
Change.
In the present embodiment, by when the brightness of backlight is constant, each predeterminable area is detected
Brightness flop in a frame time, it is thus achieved that the light of each predeterminable area of directive is in liquid crystal layer
Transmitance standards change in a frame time, and then by regulation backlight in a frame time
Brightness flop, the display in a frame time of the multiple predeterminable areas on display floater can be made
Brightness keeps constant.
In sum, the backlight compensation method that the embodiment of the present invention one and embodiment two provide,
In every frame time, control backlight and present corresponding to multiple predeterminable areas transmitting of display floater
The light of brightness flop, the brightness flop of described light is to described light passing through in liquid crystal layer
Rate compensates, and makes the plurality of predeterminable area display brightness in a frame time keep not
Become, such that it is able to avoid the occurrence of " flicker " phenomenon.
Embodiment three:
The present embodiment provides a kind of backlight, and it is for providing backlight to display floater, described
Backlight can be according to the light of the predeterminable area of its directive display floater at described display floater
Liquid crystal layer in transmitance change in a frame time and regulate its directive display floater
The brightness of the light of predeterminable area.
Specifically, described backlight is direct-light-type backlight, and it includes multiple luminescence unit；
With one, each luminescence unit includes that the region of multiple pixel is corresponding, described luminescence unit include to
A few luminescent device, described luminescent device is for sending out to the region corresponding with described luminescence unit
Penetrate light, and described luminescent device can regulate the brightness of the light in region described in its directive.From
And in a frame time, showing according to the light that the luminescent device in each luminescence unit sends
The change of the transmitance in the liquid crystal layer of panel, the luminescent device in this luminescence unit can regulate
The brightness of the light of its injection, makes the region corresponding with this luminescence unit be shown in a frame time
The brightness shown keeps constant.Preferably, described luminescent device be light emitting diode (LED) or
Organic Light Emitting Diode (OLED).
Specifically, each luminescence unit includes a luminescent device, so makes and each luminescence
The region that unit is corresponding only relies upon a luminescent device and transmits to light, thus to directive
When the brightness of the light in described region is adjusted, only need to regulate a luminescent device and be sent
The brightness of light, it is clear that such regulative mode is easier.
It should be noted that in the present embodiment, each luminescence unit and one include multiple
The region of pixel is corresponding, but the present invention is not limited to this, in actual applications, each luminous single
Unit can also be corresponding with a pixel, and in the case, described luminescence unit includes that one is sent out
Optical device, described luminescent device is used for the pixel emission light corresponding with described luminescence unit,
And described luminescent device can regulate the brightness of the light of pixel described in its directive.
Embodiment four:
The present embodiment provides a kind of backlight for providing backlight to display floater equally, with
Embodiment three is compared, and it can exist according to the light of the predeterminable area of its directive display floater equally
The change in a frame time of the transmitance in the liquid crystal layer of described display floater and regulate it and penetrate
Brightness to the light of the predeterminable area of display floater.The backlight of the present embodiment offer and enforcement
Other something in common of example three are owing to there being detailed description in embodiment three, the most superfluous at this
State.
The backlight provided with regard to the present embodiment below is carried out with the difference of embodiment three in detail
Describe.In the present embodiment, described light source is side backlight source, and it includes multiple luminous single
Unit；Each luminescence unit is corresponding with one-row pixels or adjacent multirow pixel, described luminous single
Unit includes at least one luminescent device, and described luminescent device is for corresponding with described luminescence unit
Described one-row pixels or adjacent multirow pixel emission light, and described luminescent device can adjust
Save the brightness of the light of one-row pixels described in its directive or adjacent multirow pixel.Thus at a frame
In time, the light sent according to the luminescent device in each luminescence unit is in liquid crystal layer
The change of transmitance, the luminescent device in this luminescence unit can regulate the bright of the light of its injection
Degree, makes the described one-row pixels corresponding with this luminescence unit or adjacent multirow pixel when a frame
Interior display brightness keeps constant.Preferably, described luminescent device is light emitting diode
Or Organic Light Emitting Diode (OLED) (LED).
In sum, the backlight that the embodiment of the present invention three and embodiment four provide, it is possible to root
According to the light of predeterminable area of its directive display floater transmitance in liquid crystal layer when a frame
In change and regulate the brightness of the light of the predeterminable area of its directive display floater, thus can
With by regulation backlight brightness of the light of directive display floater in a frame time, to light
The change of the transmitance in liquid crystal layer compensates, and makes display floater showing in a frame time
Show that brightness keeps constant, thus avoid the occurrence of " flicker " phenomenon.
Embodiment five:
The present embodiment provides a kind of display device, and it includes display floater and backlight, described
Display floater is provided with multiple predeterminable area, and described backlight is for providing to described display floater
Backlight, and the backlight that the described backlight employing embodiment of the present invention three and embodiment four provide.
The display device that the present embodiment provides, it uses the embodiment of the present invention three and embodiment four
The backlight provided, can be by regulation backlight directive display floater pre-in a frame time
If the brightness of the light in region, the change to light transmitance in the liquid crystal layer of display floater
Compensate, such that it is able to make display device display brightness in a frame time keep constant,
Avoid the occurrence of " flicker " phenomenon.
It is understood that the principle that is intended to be merely illustrative of the present of embodiment of above and adopt
Illustrative embodiments, but the invention is not limited in this.General in this area
For logical technical staff, without departing from the spirit and substance in the present invention, can make
Various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (11)
1. a backlight compensation method, for saturating in the liquid crystal layer of display floater of light
Cross rate change in each frame time to compensate, make display floater showing in a frame time
Show that brightness keeps constant, it is characterised in that comprise the steps:
S1, the light of multiple predeterminable areas of detection backlight directive display floater is at liquid crystal layer
In transmitance standards change in a frame time；
S2, according to described light penetration standards change in a frame time, calculating is sent as an envoy to
When the display brightness of multiple predeterminable areas of display floater keeps constant in a frame time, backlight
The brightness flop presented needed for the light of each predeterminable area of source directive；And backlight is set often
Launch the light presenting corresponding bright change to multiple predeterminable areas of display floater in one frame time
Line.
Backlight compensation method the most according to claim 1, it is characterised in that the described back of the body
The light of each predeterminable area of light source directive transmitance in liquid crystal layer is in a frame time
Standards change is light the passing through in liquid crystal layer of the presetted pixel in this predeterminable area of directive
Rate change in a frame time.
Backlight compensation method the most according to claim 2, it is characterised in that described pre-
If pixel is positioned at the center of described predeterminable area.
Backlight compensation method the most according to claim 1, it is characterised in that the described back of the body
The light of each predeterminable area of light source directive transmitance in liquid crystal layer is in a frame time
Standards change is that the light of all pixels in this predeterminable area of directive or wherein partial pixel exists
The meansigma methods of the change in a frame time of the transmitance in liquid crystal layer.
5. according to the backlight compensation method described in claim 2 or 4, it is characterised in that root
Light passing through in liquid crystal layer according to the described pixel of following method detection directive predeterminable area
Rate change in a frame time:
S10, the thin film transistor (TFT) of the described pixel in detection predeterminable area is in a frame time
Leakage current；
S11, according to described leakage current, the voltage calculated on the pixel electrode of described pixel exists
Change in one frame time；
S12, according to the voltage difference between pixel electrode and public electrode and light in liquid crystal layer
Transmitance between corresponding relation, and the voltage on described pixel electrode is in a frame time
Change, it is thus achieved that the light of pixel described in directive transmitance in liquid crystal layer is in a frame time
Change.
6. according to the backlight compensation method described in claim 2 or 4, it is characterised in that root
Light passing through in liquid crystal layer according to the described pixel of following method detection directive predeterminable area
Rate change in a frame time:
S10, provides the backlight of brightness constancy to the predeterminable area of display floater；
S11, the change in a frame time of the display brightness of the described pixel in detection predeterminable area
Change；
S12, according to the change in a frame time of the display brightness of the described pixel of predeterminable area
Change, calculate the light of described pixel of the directive predeterminable area transmitance in liquid crystal layer one
Change in frame time.
Backlight compensation method the most according to claim 1, it is characterised in that the described back of the body
Light source includes multiple luminescence unit, and the quantity of luminescence unit is equal with the quantity of predeterminable area, and
The two one_to_one corresponding；
Each luminescence unit includes at least one luminescent device, described luminescent device for
The predeterminable area that described luminescence unit is corresponding launches light, and described luminescent device can regulate it
The brightness of the light of the predeterminable area that directive is corresponding with described luminescence unit.
Backlight compensation method the most according to claim 7, it is characterised in that described
Optical device is light emitting diode or Organic Light Emitting Diode.
Backlight compensation method the most according to claim 7, it is characterised in that Mei Gesuo
State luminescence unit and include a luminescent device.
10. according to the backlight compensation method described in claim 7 or 9, it is characterised in that institute
Stating backlight is direct-light-type backlight；
The predeterminable area corresponding with described luminescence unit is the region that a pixel is corresponding, or,
It it is the region including multiple pixel.
11. according to the backlight compensation method described in claim 7 or 9, it is characterised in that institute
Stating light source is side backlight source；
Each predeterminable area includes one-row pixels or adjacent multirow pixel.
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